JP5957590B1 - Telescopic telescopic helmet - Google Patents

Abstract

In a telescopic telescopic helmet that is changed between a retracted state and an unfolded state by a wearer, the buckling resistance of the helmet in the unfolded state is reduced because the helmet is retractable. To suppress that. In a telescopic stretchable helmet 1000 to be worn on a wearer's head, a shell 10 in which a plurality of segments are connected so as to be relatively displaceable in the height direction of the helmet, and an uppermost segment 20 or A continuum 450 extending between the uppermost mating member being another member attached thereto and the lowermost segment 26 or the lowermost mating member being another member attached thereto, the continuum comprising: In the maximum deployed state of the helmet, the uppermost mating member is switched between a locked state and a released state according to the wearer's operation, but the lowermost mating member is maintained in the locked state. [Selection] Figure 23

Description

  The present invention relates to a helmet that can be changed between a retracted state and an unfolded state by a wearer, and in particular, telescopically expands and contracts in the height direction of the helmet by a force applied by the wearer, whereby the helmet is The present invention relates to a telescopic telescopic helmet that changes between a fully deployed state and a fully retracted state.

  Various helmets worn on human heads for the purpose of protecting the human head from impact are already in widespread use.

  As this type of helmet, there has already been proposed a foldable helmet that can be reduced in size when the wearer folds or shrinks it when not in use.

  Patent Document 1 discloses a telescopic telescopic helmet as an example of a folding helmet. This telescopic telescopic helmet is configured to telescopically expand and contract in the height direction of the helmet due to the force applied by the wearer, thereby changing the helmet into a deployed state and a retracted state. .

  Specifically, this telescopic telescopic helmet is a shell (or a cap body or a helmet body) formed by laminating a plurality of segments (or movable members) extending in the horizontal direction, and is attached to the wearer's head. The segments are connected to each other so that they can move relative to each other in the height direction of the helmet.

  Further, when the helmet is changed from the retracted state to the expanded state, the helmet is changed to the retracted state against the wearer's will in the expanded state. In order to prevent this, the wearer has a band member that is selectively slidably mounted at a predetermined position in the helmet.

  When the band member is attached to a predetermined position of the helmet by the wearer, relative movement between the plurality of segments is not completely prevented, thereby maintaining the helmet in the deployed state. . On the other hand, when the band member is detached from the predetermined position of the helmet by the wearer, relative movement between the plurality of segments is permitted, so that the wearer can store the helmet or It is possible to develop from.

JP 2000-192320 A

  However, when using this conventional helmet, the wearer is forced to perform an operation of attaching or removing the band member to a predetermined position of the helmet.

  Furthermore, when this conventional helmet is used, when the band member is attached to a predetermined position of the helmet by the wearer, relative movement between the plurality of segments is limited. However, the band member is not attached to each of a plurality of segments constituting the shell of the helmet in a locked state.

  Therefore, even if the helmet member is deployed because the band member is mounted at a predetermined position of the conventional helmet, it is worn unless additional measures different from the band member are taken. Due to an external force acting on a person, some segments of the shell may approach other local segments or be locally deformed to form a gap with other adjacent segments. There is a possibility that.

  In this unfolded state of the helmet, if an unplanned movement occurs between adjacent segments, the wearer feels that the helmet shell used is not rigid enough, and thus the shock absorption of the helmet. You may feel anxious about your lack of sex. This is because all users have a fixed idea that a helmet is a product that can absorb shock only after maintaining its shape against external forces.

  Against this backdrop, the present invention is a telescopic telescopic helmet that can be changed between a retracted state and an unfolded state by a wearer, and the rigidity of the helmet in the unfolded state can be stored in the helmet. It is made as a subject to suppress that it falls for a cause.

In order to solve the problem, according to one aspect of the present invention, there is a telescopic stretchable helmet to be worn on the wearer's head, in the height direction of the helmet by a force applied by the wearer. Telescopically expanding and contracting, whereby the helmet changes between a fully deployed state and a fully retracted state,
A telescopic telescopic shell that is generally hemispherical to be worn on the wearer's head, and comprises a plurality of segments that are relatively displaceable in the height direction;
A connection mechanism that connects the plurality of segments together by a continuous body that continuously extends from the uppermost segment to the lowermost segment of the plurality of segments along the inner surface of the helmet, and in the deployed state, The plurality of segments are respectively locked to prevent relative displacement between the segments, but in the retracted state, at least one of the plurality of segments is released to allow relative displacement between the segments. Telescopic telescopic helmets including and are provided.

  According to this helmet, thanks to the connection mechanism, in the deployed state of the helmet, the relative position between the plurality of segments does not need to change dramatically, thereby making the connection between the segments stronger, As a result, the overall rigidity of the helmet is improved. Thereby, the sense of security that the wearer can obtain from the helmet increases.

  Further, the helmet has a function in which the coupling mechanism prevents unscheduled separation between segments (deployment exceeding the deployment limit) in the deployed state of the helmet, and unscheduled access between the segments (stored). And the ability to simultaneously block unscheduled bi-directional motion between segments.

  According to this embodiment, in order to prevent the relative position between the plurality of segments from changing suddenly in the deployed state of the helmet, it is not indispensable to additionally take measures different from the coupling mechanism. Disappear. As a result, the number of parts of the helmet can be reduced, the number of manufacturing steps can be reduced, and the manufacturing cost can be easily reduced.

  In this helmet, the continuum and the longitudinal member (an example of the continuum) have a hemispherical surface assuming a hemispherical surface that approximates the inner surface of the shell geometrically. It is possible to lay out so as to extend substantially along one meridian defined above, to extend so as to intersect with the meridian, or to extend in a spiral shape.

  The following aspects are obtained by the present invention. Each aspect is divided into sections, each section is given a number, and is described in a form that cites other section numbers as necessary. This is to facilitate understanding of some of the technical features that the present invention can employ and combinations thereof, and the technical features that can be employed by the present invention and combinations thereof are limited to the following embodiments. Should not be interpreted. That is, it should be construed that it is not impeded to appropriately extract and employ the technical features described in the present specification as technical features of the present invention although they are not described in the following embodiments.

  Further, describing each section in the form of quoting the numbers of the other sections does not necessarily prevent the technical features described in each section from being separated from the technical features described in the other sections. It should not be construed as meaning, but it should be construed that the technical features described in each section can be appropriately made independent depending on the nature.

(1) A telescopic telescopic helmet worn on the wearer's head,
A hemispherical shell formed by connecting a plurality of segments having at least an uppermost segment and a lowermost segment so as to be relatively displaceable in the height direction of the helmet;
An uppermost mating member which is the uppermost segment or another member attached thereto, and a continuous body extending between the lowermost segment or the lowermost mating member which is another member attached thereto, and
The continuum is in a locked state in which, in the maximum deployed state in the height direction of the helmet, the uppermost counterpart member is locked at least in the length direction of the continuum according to the operation of the wearer A telescopic telescopic helmet that switches to a released state but is maintained in a locked state in which the lowermost mating member is locked at least in the length direction of the continuous body.

(2) A telescopic telescopic helmet to be worn on the wearer's head, and telescopically expands and contracts in the height direction of the helmet by the force applied by the wearer, whereby the helmet is fully deployed Changing between state and fully stored state,
A telescopic telescopic shell that is generally hemispherical to be worn on the wearer's head, and comprises a plurality of segments that are relatively displaceable in the height direction;
A coupling mechanism that couples the plurality of segments to each other, and prevents the approach in the height direction between at least the uppermost segment and the lowermost segment of the plurality of segments when the helmet is fully deployed. However, in the fully retracted state of the helmet, the one that allows separation in the height direction between the plurality of segments adjacent to each other, and
The coupling mechanism is
A continuous body continuously extending along the inner surface of the helmet from the position of the uppermost segment to the position of the lowermost segment;
A locking portion provided over the continuous body and the uppermost segment or a mating member which is another member mounted on the uppermost segment, and the continuous body and the mating member are engaged with each other. The locked state that restricts relative displacement between the continuum and the mating member, and the release state in which both are separated from each other and allow the relative displacement, and always in the locked state;
An operation portion operated by a wearer to switch the lock portion from the locked state to the released state, and
The continuum is a telescopic telescopic helmet that does not separate from the lowermost segment or another member attached to it regardless of whether the helmet is in the fully deployed state or the fully retracted state.

(3) The lock portion includes a first engaging portion that is a part of the continuous body or another member attached to the continuous body, and another part of the counterpart member or another member attached to the counterpart member. A second engaging portion which is a member, and the first engaging portion and the second engaging portion are engaged with each other to realize the locked state, while the first engaging portion and the second engaging portion are realized. The telescopic telescopic helmet according to item (2), wherein the release state is realized by the engagement parts being separated from each other.

(4) The continuum is displaceable relative to the second engagement portion in a direction intersecting the length direction of the continuum even in the locked state. Arranged along the inner surface of the helmet,
The operation portion causes an operation force applied by a wearer to act on the first engagement portion so that the first engagement portion is separated from the second engagement portion, thereby causing the lock portion to move. The telescopic telescopic helmet according to item (3), which switches from the locked state to the released state.

(5) The telescopic telescopic helmet according to any one of (2) to (4), wherein the operation unit is arranged on the helmet so that the wearer can access the inside of the helmet.

(6) The telescopic telescopic helmet according to any one of (2) to (4), wherein the operation unit is disposed on the helmet so that the wearer can access the helmet from the outside.

(7) The continuum includes a plurality of longitudinal members extending between the uppermost mating member and the lowermost mating member, respectively, and the telescopic expansion and contraction according to any one of (1) to (6) Helmet.

(8) The telescopic telescopic helmet according to any one of (1) to (7), wherein the number of the plurality of segments is two, three, or four.

  According to the present invention, the following aspects are also obtained.

(1) A helmet that is worn on the wearer's head and telescopically expands and contracts in the height direction of the helmet due to the force applied by the wearer, so that the height dimension of the helmet is maximum. A telescopic telescopic helmet that changes between a maximum stretched state and a maximum contracted state in which the height dimension is minimum.

(2) The helmet includes a generally hemispherical shell;
The shell includes a plurality of movable members that can be fitted to each other and have a nested structure,
These movable members can be relatively displaced in the height direction,
The telescopic telescopic helmet according to item (1), wherein the movable members are connected to each other so as not to be separated from each other.

(3) Furthermore, including a connection mechanism that selectively connects and releases the plurality of movable members by a wearer's operation,
The coupling mechanism includes: a first target movable member that is at least one of at least one intermediate movable member excluding the uppermost movable member and the lowermost movable member among the plurality of movable members; A first connecting portion that selectively connects and releases an upper movable member adjacent to one target movable member on the upper side thereof and a lower movable member adjacent to the first target movable member on the lower side thereof. Including
The first connecting portion has a first movable portion common to the first target movable member, the upper movable member, and the lower movable member, and both of the first movable portion around the first horizontal axis. Due to the direction rotation, the connection and release between the first target movable member and the upper movable member and the connection and release between the first target movable member and the lower movable member are substantially synchronized with each other. Telescopic telescopic helmet according to item (2).

(4) The first connecting portion further includes a first fixing portion that is fixed to the first target movable member,
The first movable part can rotate relative to the first fixed part around the first horizontal axis,
Both end portions of the first movable portion include an upper engagement portion that can be engaged with the upper movable member, and a lower engagement portion that can be engaged with the lower movable member,
The unidirectional rotation of the first movable portion around the first horizontal axis releases the connection between the upper movable member and the upper engagement portion, and the lower movable member and the lower engagement portion. The connection between the upper movable member and the upper engagement portion is caused by the reverse rotation of the first movable portion around the first horizontal axis. The telescopic telescopic helmet according to item (3), in which the connection between the lower movable member and the lower engagement portion is substantially synchronously performed.

(5) The connection mechanism includes a second target movable member that is at least one of at least one non-first target movable member excluding the first target movable member among the plurality of movable members; The second horizontal axis of the second movable part common to the second target movable member and the counterpart movable member is connected to and released from the counterpart movable member adjacent to the two target movable members on the upper side or the lower side thereof. Including a second connecting portion selectively performed by a bi-directional bending motion with an elastic hinge extending along the fulcrum as a fulcrum,
The second connecting part further includes a second fixed part fixed to the second target movable member,
The second movable part is coupled to the second fixed part in a cantilever manner via the elastic hinge at the base end part thereof,
Of the both ends of the second movable part, the free end part away from the coupling part with the elastic hinge includes an engaging part that can be engaged with the counterpart movable member,
While the second movable part releases the connection between the counterpart movable member and the engaging part by a one-way bending motion with the elastic hinge as a fulcrum, the elastic hinge of the second movable part The telescopic telescopic helmet according to (3) or (4), wherein the connection between the counterpart movable member and the engaging portion is performed by a backward bending motion with fulcrum as a fulcrum.

(6) The connection mechanism further includes:
Including a safety device operated by the wearer to prevent at least the first target movable member of the first target movable member and the second target movable member from being accidentally rotated by the wearer;
The safety device is
An operating member operated by the wearer;
When the operation member is operated by the wearer in a direction different from the direction in which the first target movable member can rotate, the operation member is independent in the different direction without the rotation of the first target movable member. On the other hand, following the movement, when the operation member is operated by the wearer in the same direction as the direction in which the first target movable member is rotatable, the operation member is moved in the same direction. The telescopic telescopic helmet according to any one of (3) to (5), including a motion control mechanism that controls the motion of the operation member so as to move together with the target movable member.

(11) A telescopic telescopic helmet to be worn on the wearer's head, which telescopically expands and contracts in the height direction of the helmet by the force applied by the wearer, whereby the helmet is fully deployed Changing between state and fully stored state,
A telescopic telescopic shell that is generally hemispherical to be worn on the wearer's head, and comprises a plurality of segments that are relatively displaceable in the height direction;
A coupling mechanism that couples the plurality of segments to each other, and prevents the approach in the height direction between at least the uppermost segment and the lowermost segment of the plurality of segments when the helmet is fully deployed. However, in the fully retracted state of the helmet, a telescopic telescopic helmet including: a plurality of segments that are adjacent to each other and permitting separation in the height direction.

(12) A telescopic telescopic helmet to be worn on the wearer's head, which telescopically expands and contracts in the height direction of the helmet by the force applied by the wearer, whereby the helmet is fully deployed Changing between state and fully stored state,
A telescopic telescopic shell that is generally hemispherical to be worn on the wearer's head, and comprises a plurality of segments that are relatively displaceable in the height direction;
A connecting mechanism for connecting the plurality of segments to each other by a continuous body continuously extending from the uppermost segment to the lowermost segment of the plurality of segments along the inner surface of the helmet, wherein the helmet is fully deployed. In this case, at least the uppermost segment and the lowermost segment of the plurality of segments are respectively locked to prevent relative displacement between the segments. A telescopic telescopic helmet including: a plurality of segments excluding the lowermost segment and allowing relative displacement between the segments.

(13) The plurality of segments include an uppermost segment, at least one intermediate segment, and a lowermost segment arranged in the height direction,
The coupling mechanism is
A flexible longitudinal member extending between the uppermost segment and the lowermost segment along a plurality of inner surfaces of the plurality of segments, the innermost end located at the uppermost segment; Having at least one intermediate portion located in the at least one intermediate segment, and an outermost end portion located in the lowermost segment;
A plurality of first engaging portions provided on the longitudinal member;
A plurality of second engaging portions respectively provided in the uppermost segment and the at least one intermediate segment, wherein the helmet is fully locked with the plurality of first engaging portions in a fully deployed state. The telescopic telescopic helmet according to item (11) or (12), which includes engaging and disengaging from the plurality of first engaging portions in the fully retracted state and the halfway retracted state of the helmet.

(14) The coupling mechanism further includes:
The outermost end is displaced to the lowermost segment, and the outermost end is relatively displaced in the direction of approaching the uppermost segment with respect to the lowermost segment in both the unfolded state and the retracted state. The telescopic telescopic helmet according to item (13), including a third engaging portion that engages so that a limit to be controlled is regulated.

(15) The relative positional relationship between the plurality of first engaging portions and the plurality of second engaging portions is such that the longitudinal member is relative to the lowermost segment in the length direction thereof. Displacement is prevented in both the deployed state and the retracted state, and relative displacement with respect to the at least one intermediate segment is permitted in the retracted state, but in the fully deployed state And is allowed to be displaced relative to the uppermost segment in the retracted state but not in the fully deployed state (13) or (14 ) Telescopic telescopic helmet according to item.

(16) The coupling mechanism further includes:
Among the plurality of segments, at least two segments adjacent to each other or not adjacent to each other are each a plurality of mounting devices provided to be displaced together in the height direction, and Mounted on the inner surface of the helmet at a plurality of positions arranged discretely in the length direction, thereby holding the continuum inside the helmet in both the unfolded state and the retracted state The telescopic stretchable helmet according to item (12) including:

(17) A telescopic stretchable helmet to be worn on the wearer's head, which telescopically expands and contracts in the height direction of the helmet by the force applied by the wearer, whereby the helmet is unfolded And the storage state,
A telescopic telescopic shell that is generally hemispherical to be worn on the wearer's head, and comprises a plurality of segments that are relatively displaceable in the height direction;
A first connecting mechanism for connecting the plurality of segments to each other, wherein in the fully deployed state of the helmet, the segments adjacent to each other are prevented from being separated from each other in the height direction; In the fully retracted state and the halfway retracted state of the helmet, the adjacent segments are allowed to approach and separate from each other in the height direction,
A second connecting mechanism for connecting the plurality of segments to each other by a continuous body continuously extending from an uppermost segment to a lowermost segment of the plurality of segments along an inner surface of the helmet, In the unfolded state, at least approach in the height direction between at least the uppermost segment and the lowermost segment among the plurality of segments is prevented. Adjoining / separating in the height direction between adjacent ones is permitted, and in the fully retracted state of the helmet, at least separation in the height direction between adjacent ones of the plurality of segments is prevented. Telescopic telescopic helmet including.

(18) A telescopic helmet to be worn on the wearer's head, which expands and contracts in the height direction of the helmet by a force applied by the wearer, whereby the helmet is in a deployed state and a retracted state. Which changes to
A shell that is generally hemispherical to be worn on the wearer's head, and is extendable in the height direction;
An elastic telescopic interior mounted inside the helmet that directly contacts the wearer's head and promotes the helmet being held by the wearer's head in the unfolded state. Including things,
Whether the helmet is in the unfolded state or the retracted state, the interior body is contracted by its own elasticity and flat when it is not attached to the wearer's head. However, when the helmet is mounted on the wearer's head in the unfolded state, the inner body is pushed and pulled by the wearer's head, thereby the head of the wearer. Telescopic helmet that transitions into a recessed deployment state to follow the shape of the.

FIG. 1 is a perspective view showing an appearance of a helmet according to a first exemplary embodiment of the present invention in a use state that is a maximum extension state. FIG. 2 is a perspective view showing the helmet shown in FIG. 1 in a retracted state which is a maximum contracted state. FIG. 3 is a front view showing the appearance of the helmet shown in FIG. 1 in a use state which is a maximum extension state. FIG. 4 is a side view showing the appearance of the helmet shown in FIG. 1 in a use state which is a maximum extension state. FIG. 5 is a front cross-sectional view showing the helmet shown in FIG. 1 in a fully extended state in use. FIG. 6 is a front sectional view showing the helmet shown in FIG. 1 in a retracted state which is a maximum contracted state. FIG. 7 is a rear view showing the internal structure of the helmet shown in FIG. 1 in a use state which is a maximum extension state. FIG. 8 is a perspective view showing the internal structure of the helmet shown in FIG. 1 in a use state which is a maximum extension state. FIG. 9 is a perspective view showing an example of a connecting portion that connects a plurality of movable members in the helmet shown in FIG. 1. FIG. 10 is a perspective view showing an example of a lock for locking a plurality of movable members in the helmet shown in FIG. FIG. 11 is a perspective view illustrating an appearance of a connection mechanism for selectively performing connection and release between four movable members in a helmet according to the second exemplary embodiment of the present invention. 12 is a longitudinal sectional view showing the coupling mechanism shown in FIG. FIG. 13 is a lower side connection part for selectively performing connection and release between the third-stage movable member and the fourth-stage movable member of the helmet shown in FIG. 11 among the connection mechanisms shown in FIG. It is the some perspective view and sectional drawing which show this. 14 selectively connects and releases the first-stage movable member, the second-stage movable member, and the third-stage movable member of the helmet shown in FIG. 11 among the coupling mechanisms shown in FIG. It is the some perspective view which shows the upper side connection part for performing, and a some longitudinal cross-sectional view. FIG. 15 (a) shows four segments of a helmet according to a third exemplary embodiment of the present invention, together with a coupling mechanism for selectively coupling and releasing the segments in the fully deployed state. FIG. 15 (b) is a cross-sectional view, and FIG. 15 (b) is a front view showing the connecting mechanism together with a portion of the four segments located around the connecting mechanism in the fully deployed state. ) Is a cross-sectional view showing four segments of the helmet together with a connection mechanism for selectively connecting and releasing the segments in the fully retracted state. FIG. 16 is a perspective view showing a part of the coupling mechanism shown in FIG. 15 together with a part of the four segments located around the coupling mechanism in the fully deployed state. FIG. 17 (a) shows four segments of a helmet according to the fourth exemplary embodiment of the present invention together with a connection mechanism for selectively connecting and releasing the segments in the halfway retracted state. FIG. 17B is a cross-sectional view showing four segments of the helmet together with the connection mechanism in a fully retracted state, and FIG. 17C is a cross-sectional view of the connection mechanism. It is a perspective view showing typically one of a plurality of wearing tools. 18 (a) is a bottom perspective view showing the helmet according to the fifth exemplary embodiment of the present invention in its fully retracted state and the interior body in the flat maximum contracted state, and FIG. b) is a side cross-sectional view showing the helmet together with the interior body in its fully unfolded state and in a depressed maximum stretched state. FIG. 19 (a) shows four segments of a helmet according to a sixth exemplary embodiment of the present invention, together with a coupling mechanism for selectively coupling and releasing the segments in the fully deployed state. FIG. 19B is a cross-sectional view, and FIG. 19B is a front view showing the connecting mechanism together with a portion of the four segments located around the connecting mechanism in the fully deployed state. ) Is a cross-sectional view showing four segments of the helmet together with the connecting mechanism in a fully retracted state. FIG. 20 (a) shows a state in which the hammock of the helmet according to the seventh exemplary embodiment of the present invention is partially removed in the state where the shell is removed from the helmet and in the fully deployed state. It is an upper perspective view shown with the upper end part of a longitudinal member, a lock part, and an operation part, and Drawing 20 (b) is a perspective view which takes out and shows the upper end part of the above-mentioned longitudinal member, a lock part, and an operation part. 20 (c) is a cross-sectional view showing the first-stage segment, the second-stage segment, and the hammock of the helmet together with the upper end portion, the lock portion, and the operation portion of the longitudinal member in a fully deployed state. is there. FIG. 21 (a) shows a coupling mechanism in a fully deployed state of the hammock, second stage segment, third stage segment, and fourth stage segment of the helmet according to the eighth exemplary embodiment of the present invention. Fig. 21 (b) is a lower perspective view showing a longitudinal member, a lock portion, and an operation portion of the helmet, and Fig. 21 (b) shows the first-stage segment, second-stage segment, and hammock of the helmet partially and fully developed. It is sectional drawing shown in a state with the upper end part of the said longitudinal member, a lock part, and an operation part. FIG. 22 (a) shows a first-stage segment, a second-stage segment, a third-stage segment, and a fourth-stage segment of the helmet according to the ninth exemplary embodiment of the present invention partially in a fully deployed state. FIG. 22B is an upper perspective view showing the operation portion of the connection mechanism, and FIG. 22B shows the upper end portion, the lock portion, and the operation portion of the longitudinal member of the connection mechanism as a first-stage segment from the helmet. FIG. 22 (c) is a cross-sectional view showing the operation unit, and FIG. 22 (d) shows a first-stage segment and a hammock of the helmet. FIG. 4 is a cross-sectional view partially showing the upper end portion, the lock portion, and the operation portion of the longitudinal member in a fully deployed state. FIG. 23 is an exploded perspective view partially showing a first-stage segment and a hammock of a helmet according to the tenth exemplary embodiment of the present invention, together with a guide belt, a tongue, a buckle, and a push button of a coupling mechanism. Yes, this figure shows the helmet upside down. 24 is an exploded perspective view showing the coupling mechanism shown in FIG. 23 in an enlarged manner. FIG. 25 is an enlarged partial cross-sectional view of the coupling mechanism shown in FIG. 23 in the unfolded state of the helmet shown in FIG. FIG. 26 is a partial cross-sectional view showing the connection mechanism shown in FIG. 23 in an enlarged manner in the storage state of the helmet shown in FIG.

  Hereinafter, some of the more specific embodiments of the present invention will be described in detail with reference to the drawings.

<First embodiment>

  1 and 2 show a perspective view of a helmet 10 according to a first exemplary embodiment of the present invention. This helmet 10 is a telescopic telescopic helmet that is worn on the wearer's head.

  Specifically, the helmet 10 telescopically expands and contracts in the height direction of the helmet 10 due to the force applied by the wearer, whereby the helmet 10 is in an expanded state (stretched state, worn state, use state). ) And a storage state (a contraction state, a storage state, a non-use state). Among the deployed states, the state in which the height dimension of the helmet 10 is the maximum is the fully deployed state, and the state in which the height dimension is the smallest is the fully retracted state. The transition state between the states is the halfway storage state (or halfway expanded state).

  The height of the helmet 10 is, for example, about 100 to about 120 mm in the stretched state, and is about 35 to about 45 mm, for example, in the contracted state.

  FIG. 1 shows the helmet 10 in an extended state, i.e., a state that can be worn by the wearer, while FIG. 2 shows the helmet 10 in a contracted state, i.e., a state in which it can be stored by the wearer. .

  The helmet 10 includes a shell (or a cap body or a helmet body) 14 having a generally hemispherical shape. The material of the shell 14 is a material having rigidity, for example, a synthetic resin such as ABS, PE, PP.

  FIG. 3 shows a front view of the helmet 10 in the extended state of use, while FIG. 4 shows a side view of the helmet 10 in the extended state of use.

  As shown in FIGS. 3 and 4, the shell 14 includes a plurality of movable members (segments) 20, 22, 24, and 26 that complement each other in shape and can be relatively displaced in the height direction. I have. In the present embodiment, the number of the movable members 20, 22, 24, and 26 is four. However, the number of movable members 20, 22, 24, and 26 may be two, three, or five or more.

  FIG. 5 is a front cross-sectional view showing the helmet 10 in a stretched state, and FIG. 6 is a front cross-sectional view showing the helmet 10 in a retracted state.

  The four movable members 20, 22, 24, and 26 have a nested structure and can perform a telescopic operation. Further, the movable members 20, 22, 24 and 26 are connected to each other so as not to be separated from each other. The structure for the connection will be described in detail later.

  In the present embodiment, the four movable members 20, 22, 24, and 26 are relatively displaced by a linear motion along the height direction. Instead, for example, a spiral motion around a straight line extending in the height direction is used. The relative displacement may be achieved by

  From an ergonomic point of view, as a wearer, in order to expand and contract the four movable members 20, 22, 24, and 26, the movable members 20, 22, 24, and 26 move relative to each other rather than move linearly. It is considered that the operation is easier when the spiral movement is performed. However, when the movable members 20, 22, 24, and 26 are spirally moved with each other, the spiral motion is a combined motion of a linear motion and a rotational motion, and the direction of the rotational motion is clockwise in design. The wearer must spirally move the movable members 20, 22, 24, and 26 in their requested orientations because they are uniquely required to be either counterclockwise or counterclockwise. An additional constraint is imposed.

  When the helmet 10 is viewed from directly above, the four movable members 20, 22, 24, and 26 include a central movable member (uppermost segment) 20, two intermediate movable members (two intermediate segments) 22 and 24, and an outer side. And a movable member (lowermost segment) 26. The two intermediate movable members 22 and 24 are interposed between the central movable member 20 and the outer movable member 26. The outer movable member 26 has a collar 28 for the helmet 10 on its front side. By looking at the helmet 10 from the side, the central movable member 20 is the first movable member, the intermediate movable member 22 is the second movable member, the intermediate movable member 24 is the third movable member, and the outer movable member 26 is It can also be referred to as a fourth-stage movable member.

  In the present embodiment, the outer movable member 26 is configured as one member having a generally annular shape, but instead, for example, a pair of straight lines extending in the front-rear direction and separated in the left-right direction, respectively. It is possible to form a member or a pair of linear members that extend in the left-right direction and are separated in the front-rear direction.

  Thanks to these movable members 20, 22, 24 and 26, the shell 14 expands and contracts in the height direction due to the relative displacement between the four movable members 20, 22, 24 and 26 due to the force applied by the wearer. Is possible. In the contracted state, the four movable members 20, 22, 24, and 26 are closest to each other to minimize the height dimension, while in the extended state, the four movable members 20, 22, 24 and 26 are the farthest away from each other to maximize the height dimension.

  As shown in FIG. 6, for each of the two intermediate movable members 22 and 24 and the outer movable member 26, the cross section obtained by virtually cutting along the vertical plane is generally a vertical portion 30 extending in the height direction. And a horizontal portion 32 extending generally horizontally at the upper end of the vertical portion 30.

  The height dimension of each of the four movable members 20, 22, 24, and 26 is set so that the height dimension of the outer movable member 26 is the maximum dimension and the other movable members 20, The respective sizes of 22 and 24 can be set so as not to exceed the maximum size, or the four movable members 20, 22, 24 and 26 can be set to substantially coincide with each other.

  For each of the two intermediate movable members 22 and 24 and the outer movable member 26, the horizontal portion 32 has a shoulder surface 34 that extends in a generally horizontal direction. The shoulder surface 34 has an area where the wearer can make contact with the tip of the finger.

  Thanks to the presence of such a contactable region, the wearer places the helmet 10 in the contracted state on the head such that the inner surface of the central movable member 20 faces the uppermost surface of the wearer's head, Subsequently, both the left and right sides of the outer movable member 26 are gripped with both hands, and at that time, it becomes possible to contact the shoulder surface 34 of the horizontal portion 32 with the middle finger (or index finger or ring finger) of each hand.

  In that position, the wearer leaves the central movable member 20 on the wearer's head and leaves the other movable members 22, 24 and 26, ie, the two intermediate movable members 22 and 24 and the outer movable member 26. Press down. As a result, the four movable members 20, 22, 24, and 26 perform a telescopic operation from the contracted state, and eventually shift to the extended state.

  FIG. 7 shows a rear view of the helmet 10 in the extended state of use, and FIG. 8 shows a perspective view of the helmet 10 in the extended state of use.

  The helmet 10 further includes a plurality of connecting portions 40, 42, and 44 provided between two adjacent movable members among the four movable members 20, 22, 24, and 26. As shown in FIGS. 5 and 6, the connecting portion 40 is disposed across the central movable member (first stage) 20 and the upper intermediate movable member (second stage) 22. As shown in FIGS. 7 to 9, the upper intermediate movable member (second stage) 22 and the lower intermediate movable member (third stage) 24 are arranged across the upper intermediate movable member (second stage) 24. As shown in FIG. 8, the lower intermediate movable member (third stage) 24 and the lowermost outer movable member (fourth stage) 26 are disposed.

  In the present embodiment, the number of the connecting portions 40, 42 and 44 for each connecting interface between the four movable members 20, 22, 24 and 26 is four. The number can be 5 or more, an even number, or an odd number.

  Specifically, as shown in FIGS. 5 and 6, the connecting portion 40 includes a contact portion 40 a provided at the lower end of the central movable member (first stage) 20 and an upper intermediate movable member (second stage). ) The receiving portion 40b provided at the inner edge portion of the horizontal portion 32 of 22 is connected to the height direction so as to be relatively displaceable. In this connection part 40, the upper surface of the contact part 40a is limited by the limit that the central movable member (first stage) 20 and the upper intermediate movable member (second stage) 22 are separated from each other in the height direction. It is defined by contacting the downward surface of the receiving portion 40b.

  As shown in FIG. 9 representatively showing the connecting portion 42, each connecting portion 42, 44 is configured such that a male portion and a female portion respectively arranged on the two adjacent movable members are slidably fitted to each other. In order to realize the contracted state, the slide fitting portion 50, an approach limit stopper 52 that defines a limit at which the two adjacent movable members approach each other, and the two adjacent members to realize the extended state A separation limit stopper 54 that defines a limit for the movable members to be separated from each other is provided. In the example illustrated in FIG. 9, the slide fitting portion 50 includes a slide bar 56 as a male portion and a guide 58 as a female portion.

  As for the connecting portion 42, the lower one of the two adjacent movable members, that is, the lower intermediate movable member (third stage) 24, an approach limit stopper 52, a separation limit stopper 54, and a slide bar 56. And the guide 58 is attached to the upper one of the two adjacent movable members, that is, the upper intermediate movable member (second stage) 22.

  As shown in FIG. 7, each movable member 20, 22, 24, 26 is positive on the front side portion and the rear side portion of the wearer's head when the helmet 10 is worn on the wearer's head. The front curved portion 70 and the rear curved portion 72, and the right curved portion 74 and the left straight portion 76 that face the both sides of the wearer's head in the wearing state, respectively. Having a linearity higher than 72 (long radius of curvature, low degree of curvature).

  Four connecting portions 40 for the central movable member 20 and the intermediate movable member 22, four connecting portions 42 for the two intermediate movable members 22 and 24, and four connecting portions 44 for the intermediate movable member 24 and the outer movable member 26 are The left and right straight portions 74 and 76 of the corresponding movable members 20, 22, 24, and 26 are arranged in the same number and symmetrical to each other with respect to the front-rear vertical plane passing through the center of the helmet 10. The When it is necessary for the wearer to change the helmet 10 from the contracted state to the extended state, the wearer can move the left and right straight portions 74 and 76 of the shoulder surface 34 of the horizontal portion 32 of the outer movable member 26 with both hands. It is necessary to push down the outer movable member 26 in contact with each other.

  At this time, the left straight portion 74 and the right straight portion 76 have two action points of force from the wearer to the helmet 10, and there are four connection portions 40, four connection portions 42 and Four connecting portions 44 are arranged close to each other. Therefore, the force from the wearer is harmful to the connecting portions 40, 42, and 44 even though the connecting portions 40, 42, and 44 have a structure based on a slide motion in which problems such as twisting are likely to occur. Since the transmission is reliably performed without causing elastic deformation, problems such as twisting of the connecting portions 40, 42, and 44 do not occur. As a result, the wearer can easily extend the helmet 10 smoothly by the telescopic operation.

  As shown in FIGS. 7 and 8, the helmet 10 further has at least one lock 80, 82 and 84 disposed between the two adjacent movable members. In the present embodiment, the number of locks 80, 82, 84 for each connection interface between the four movable members 20, 22, 24, and 26 is four, but it may be two, three, It is possible to use the above number. The four locks 80 for the central movable member 20 and the intermediate movable member 22 are arranged along the circumference at equal angular intervals. This arrangement also applies to the four locks 82 for the two intermediate movable members 22 and 24 and the four locks 84 for the intermediate movable member 24 and the outer movable member 26.

  The lock 80 is disposed across the central movable member (first stage) 20 and the upper intermediate movable member (second stage) 22, and the lock 82 is arranged with the upper intermediate movable member (second stage) 22. It is arranged across the lower intermediate movable member (third stage) 24, and the lock 84 includes the lower intermediate movable member (third stage) 24 and the lowermost outer movable member (fourth stage). 26.

  Each of the locks 80, 82, 84 shifts from the unlocked state to the locked state when the two adjacent movable members attempt to shift from the contracted state to the extended state.

  Specifically, each of the locks 80, 82, and 84 allows the two adjacent movable members to be displaced from each other in the unlocked state, while the two adjacent movable members in the locked state. The two adjacent movable members are held in the extended state unless a force equal to or higher than a set value is applied from the wearer so as not to reverse the stretched state to the contracted state against the wearer's intention.

  In FIG. 10, the structure of each of the locks 80, 82, 84 is schematically shown in a perspective view, taking the lock 84 as an example. The lock 84 includes an engagement protrusion 92 having an upward surface 90, a guide 94 for guiding a linear displacement of the engagement protrusion 92, and a receiving portion 98 having a downward surface 96 on which the upward surface 90 of the engagement protrusion 92 is seated. It has.

  Regarding the lock 84, a guide 94 and a receiving portion 98 are mounted on the upper one of the two adjacent movable members, that is, the lower intermediate movable member (third stage) 24, and the two adjacent movable members are mounted. The engaging protrusion 92 is mounted on the lower one of the members, that is, the outer movable member (fourth stage) 26.

  As the helmet 10 shifts from the contracted state to the extended state, the guide 94 and the receiving portion 98 are displaced upward with respect to the engaging protrusion 92. The receiving portion 98 is elastically deformed (flexed) when the engaging projection 92 approaches from below and comes into contact with the receiving portion 98, and eventually gets over the engaging projection 92. When the receiving portion 98 gets over the engaging protrusion 92, the upward surface 90 of the engaging protrusion 92 is seated on the downward surface 96 of the receiving portion 98, and as a result, the receiving portion 98 is displaced downward with respect to the engaging protrusion 92. To be prevented. The intermediate movable member 24 and the outer movable member 26 are locked to each other by the joint action of the lock 84 and the separation limit stopper 54.

  Four locks 80 on the same movable member, four locks 82 on another movable member, and four locks 84 on yet another movable member, the two adjacent movable members transition from the contracted state to the extended state. When trying to do so, it is designed to shift from the unlocked state to the locked state at substantially the same timing.

  Instead, four locks 80 for the central movable member 20 and the intermediate movable member 22, four locks 82 for the two intermediate movable members 22 and 24, and four locks for the intermediate movable member 24 and the outer movable member 26. 84, when the two adjacent movable members try to shift from the contracted state to the extended state, a part of the four locks is changed from the unlocked state to the locked state at a timing different from the remaining locks. It is possible to change the design to shift to

  In one example, the four locks are not placed on the same plane, but the remaining two locks are placed on another plane that is vertically offset from the plane on which the two locks are placed. The In this way, the amount of force that the wearer must apply to the helmet 10 to activate each of the four locks 80, four locks 82, and four locks 84 is greatly increased temporarily. You do n’t have to.

  As is clear from the above description, in the present embodiment, each lock 80, 82, 84 constitutes an example of the “coupling mechanism” in the present invention. In contrast, the relative position between the plurality of movable members does not need to be changed unnecessarily, whereby the connection between the movable members becomes stronger, and as a result, the overall rigidity of the helmet 10 is improved.

  When the helmet 10 in the contracted state is viewed from directly above, the outline of the helmet 10 can have a rectangular shape or a square shape. In the present embodiment, the outline of the helmet 10 is designed not to exceed the outline of a paper having a size (for example, A4 size) according to a predetermined standard.

  As described above, the helmet 10 can be downsized to a thin shape so as to be notebook size and have a thickness not exceeding about 40 mm. Therefore, the helmet 10 can be stored in a space (for example, a document shelf, a desk drawer, etc.) that is too small to be stored by the size of a conventional helmet, and the wearer can carry it in a bag or bag. It can be easily carried at all times or as needed. In addition, the helmet 10 can be stored over a wall.

  As shown in FIG. 6 which is a side sectional view and FIG. 7 which is a bottom view, the helmet 10 is further disposed on the inner surface of the shell 14 and the foam 100 disposed inside the center portion of the shell 14, And an interior fitting for fixing the shell 14 to the wearer's head. The interior equipment includes a hammock 102 that supports the user's head from above, a headband (not shown) that supports the user's head from the side, and a chin strap that supports the wearer's chin from below (not shown). ).

  Both the foam 100 and the hammock 102 have a function of mitigating the impact force when the fallen object collides with the wearer's head. In the present embodiment, as shown in FIG. 6, both the foam 100 and the hammock 102 are mounted on the inner surface of the central movable member 20.

  When the helmet 10 is worn, the hammock 102 contacts the top of the wearer's head from above and supports the user's head from above in a direction in which the top is separated from the foam 100. Hammock to do. The hammock can be, for example, a part integrally formed of synthetic resin, but can be a net formed of a string-like body such as a plurality of straps instead.

<Second Embodiment>

  Next, a helmet 200 according to a second exemplary embodiment of the present invention will be described with reference to FIGS. 11 to 14. However, since this helmet 200 has many elements in common with the helmet 10 according to the first embodiment described above, only different elements will be described in detail, and the common elements will be referred to with the same name or reference numeral. Thus, a duplicate description is omitted.

  As shown in FIG. 11, the shell 14 of the helmet 200 has four movable members 20 capable of relative displacement in the height direction, like the helmet 10 according to the first embodiment shown in FIGS. 5 and 6. 22, 24 and 26 are provided. As a result, the helmet 200, like the helmet 10, is also worn by the wearer (the helmet 200 is actually being worn or is going to be worn in the future, or for potential wear in the future). Regardless of whether it is in a state of being prepared and stored, it can be selectively telescopically in the height direction, that is, in the vertical direction, by the user or a person concerned (for example, a guardian, a supporter, a caregiver, etc.) By being expanded and contracted, it is changed to a non-use state, that is, a contracted state (stored state) and a use state, that is, an extended state (deployed state).

  Hereinafter, for convenience of explanation, the four movable members 20, 22, 24 and 26 constituting the shell 14 are observed from the side of the shell 14 of the helmet 200 in a worn state, whereby the first-stage shell segment 20, These are referred to as the second-stage shell segment 22, the third-stage shell segment 24, and the fourth-stage shell segment 26, respectively.

  FIG. 11 is a perspective view showing the appearance of a connection mechanism 210 for the wearer to selectively connect and release the four shell segments 20, 22, 24, and 26, and FIG. The connecting mechanism 210 is shown in a longitudinal sectional view.

  As shown in FIG. 11 and FIG. 12, specifically, the coupling mechanism 210 includes a first-stage shell segment 20, a second-stage shell segment 22, and a third-stage shell segment 24. Connection and release between two shell segments, ie, an upper connection part 212 for selectively connecting and releasing two shell segments, and a third-stage shell segment 24 and a fourth-stage shell segment 26 And a lower connecting portion 214 for selectively performing the above.

  The upper connecting portion 212 is mainly installed in the second-stage shell segment 22, while the lower connecting portion 214 is mainly installed in the third-stage shell segment 24. Both the upper connecting portion 212 and the lower connecting portion 214 are made of synthetic resin.

  In the present embodiment, each of the upper connecting portion 212 and the lower connecting portion 214 hits the left side of the wearer's head in the wearing state in the helmet 200 (for example, a position near the wearer's left ear). It is installed as a left side connection part and a right side connection part, respectively, at two positions called a position corresponding to the right side of the head (for example, a position near the right ear of the wearer). The wearer operates the left connection portion and the right connection portion with both hands at the same time for each of the upper connection portion 212 and the lower connection portion 214, thereby causing the plurality of related shell segments to be in an expanded state and a contracted state. It becomes possible to change to.

  FIG. 13 shows the lower connecting portion 214 in a perspective view and a cross-sectional view.

  The lower connecting portion 214 has a main body portion 220 and a support portion 222 formed locally on the third-stage shell segment 24 as separate parts, and the main body portion 220 is attached to the support portion 222. Thereby, the lower side connection part 214 is comprised.

  The main body 220 connects the front plate 230 as a movable portion, the rear plate 232 as a fixed portion, and the front plate 230 to the rear plate 232 at one end thereof so as to be cantilevered and elastically deformable. The elastic hinge part 234 to be formed has an integral structure or a divided structure. At least the elastic hinge portion 234 of the main body 220 has, for example, a shape that is more easily elastically deformed than the third-stage shell segment 24 (for example, the plate thickness is made thinner than the shell segment 24), or the third-stage shell. It is desirable that the segment 24 is made of a material that is more easily elastically deformed.

  The front plate portion 230 has an upper end portion and a lower end portion, and is fixed to the elastic hinge portion 234 at the upper end portion. As a result, the front plate portion 230 can be bent in a cantilever manner with the elastic hinge portion 234 as a fulcrum. The upper end portion of the front plate portion 230 is a proximal end portion closest to the elastic hinge portion 234, while the lower end portion is a free end portion farthest from the elastic hinge portion 234.

  The support portion 222 has a base portion 240 fixed to the third-stage shell segment 24 and a concave portion 242 defined by the base portion 240, and the main body portion 220 is in the concave portion 242. 242 is inserted to complement 242 almost completely. As a result, as shown in FIG. 11, the surface of the main body 220 has the same cross-sectional shape as the surface of the portion adjacent to the main body 220 in the third-stage shell segment 24.

  At this time, as shown in FIG. 12, the rear plate portion 232 of the main body portion 220 is fixed to the base portion 240 of the support portion 222, and as a result, the front plate portion 230 is fixed to the base portion 240. On the other hand (ie, with respect to the third-stage shell segment 24), it is possible to bend relatively in the direction (release direction) indicated by the arrow A in FIG.

  As shown in FIG. 12, in the state where the main body 220 is mounted on the support 222, the upper end of the front plate 230 is positioned below the upper connecting portion 212 mounted on the second shell segment 22. On the other hand, the lower end portion of the front plate portion 230 is adjacent to the upper portion of the fourth-stage shell segment 24.

  As shown in FIGS. 12, 13, and 14 (d) to 14 (f), an upper engagement recess 244 is formed on the back surface of the upper end portion (the portion fixed to the elastic hinge portion 234) of the rear plate portion 232. Is formed. The lower engaging convex portion 246 of the upper connecting portion 212 is engaged with the upper engaging concave portion 244 in a locked state, so that the second-stage shell segment 22 and the third-stage shell segment 24 are mutually connected. Connected. Due to the engagement between the upper engagement concave portion 244 and the lower engagement convex portion 246, the second-stage shell segment 22 and the third-stage shell segment 24 may be relatively displaced in the height direction. Be blocked. Therefore, the combination of the upper engagement concave portion 244 and the lower engagement convex portion 246 constitutes an example of the “coupling mechanism” in the present invention.

  Further, as shown in FIGS. 12 and 13, a lower engagement convex portion 250 is formed on the surface of the lower end portion of the front plate portion 230. The lower engagement protrusion 250 protrudes in the direction opposite to the release direction indicated by the arrow A. The lower engaging convex portion 250 engages with an upper engaging concave portion 252 formed on the back surface of the upper portion of the fourth-stage shell segment 26 in a locked state, whereby the third-stage shell segment 24 is engaged. And the fourth shell segment 26 are connected to each other. Due to the engagement between the lower engaging convex portion 250 and the upper engaging concave portion 252, the third-stage shell segment 24 and the fourth-stage shell segment 26 may be relatively displaced in the height direction. Be blocked. Therefore, the combination of the lower engagement convex part 250 and the upper engagement concave part 252 constitutes an example of the “coupling mechanism” in the present invention.

  Such a connected state of the front plate portion 230 is a state that is established when the front plate portion 230 is in a natural state where it does not receive external force. In the natural state, the upper plate portion 230 has an upper engagement recess 244. The lower engaging convex portion 246 of the upper connecting portion 212 is engaged in the locked state, and the lower engaging convex portion 250 of the front plate portion 230 is engaged with the upper engaging concave portion 252 of the fourth shell segment 26. In order to match, the dimensional relationship of related members is set in advance.

  When the wearer pushes and bends the lower end portion (the free end portion) of the front plate portion 230 from this connected state, the lower engagement convex portion 250 is displaced in the release direction indicated by the arrow A, and the four steps. The upper shell is disengaged from the upper engaging recess 252 of the shell segment 26, thereby releasing the connection between the third-stage shell segment 24 and the fourth-stage shell segment 26.

  In this released state, the two adjacent shell segments 24 and 26 can be telescopically moved in the contraction direction by the wearer, thereby allowing the transition from the stretched state to the contracted state. . Further, the two adjacent shell segments 24 and 26 can be telescopically moved by the wearer in the direction of extension, and thereby transitioned from the contracted state to the extended state.

  When the wearer weakens the force by which the wearer presses the lower end portion (the free end portion) of the front plate portion 230 from this released state, the front plate portion 230 is restored by the elasticity of the elastic hinge portion 234 itself (the rear plate portion). 232 is displaced in the direction in which the amount of deflection from 232 decreases, that is, the direction indicated by the arrow A), and the lower engagement convex portion 250 again enters the upper engagement concave portion 252 of the fourth-stage shell segment 26. Engage in a locked state, so that the connection between the third stage shell segment 24 and the fourth stage shell segment 26 is made again.

  As shown in FIGS. 12 and 13, the lower connecting portion 214 includes a safety device 260 for preventing a wearer from operating incorrectly. Specifically, as shown in FIG. 13, the safety device 260 includes a button 262 that can be slid in the horizontal direction and that is selectively slid to a locked position and an unlocked position.

  The button 262 is attached to the surface of the front plate portion 230. An example of the button 262 has a protrusion on the surface thereof, and an operation of hooking with one finger of the wearer or pinching with two fingers is easy. The button 262 is attached to the surface of the lower end portion of the front plate portion 230 or the vicinity thereof.

  As a result, the wearer can bend the front plate portion 230 by pressing the button 262 in a state where the button 262 is slid to the unlock position. Therefore, it is possible to continuously perform the movement of sliding the button 262 and the movement of bending the front plate portion 230 without changing the contact position of the wearer's finger. As a result, deterioration of the operability of the coupling mechanism 210 due to the addition of the safety device 260 is suppressed.

  As shown in FIG. 13, the safety device 260 further includes a male part 264 that moves integrally with the button 262, a slot 266 that guides the male part 264 to be slidable in the horizontal direction, and the male part 264 is always locked. And a biasing portion 268 that biases elastically toward the position.

  The biasing portion 268 is, for example, an elastic member fixed between the button 262 and the main body 220 (for example, a synthetic resin leaf spring extending integrally from the main body 220 or a synthetic resin independent of the main body 220. Or a leaf spring made of metal or the like.

  Further, the safety device 260 does not face the male part 264 of the button 262 in the locked position of the button 262, but the male part 264 faces the male part 264 of the button 262 in the unlocked position. It has a female portion 270 that permits and allows its male portion 264 to advance. As a result, the button 262 is prevented from advancing in the locked position as will be described later, and the front plate portion 230 is also prevented from bending with respect to the rear plate portion 232, while the female portion is prevented from being unlocked. Advancement is permitted by entering into 270, and the front plate portion 230 is allowed to bend with respect to the rear plate portion 232.

  The female portion 270 may be formed on the base portion 240 of the third-stage shell segment 24 as in the example shown in FIG. 13B, but is relatively stationary with respect to the front plate portion 230. You may form in the backplate part 232 which is common at the point which is the member which is doing. When the female part 270 is formed on the base part 240, the male part 264 is prevented from moving forward by contacting the surface of the base part 240 in the locked position, while the female part 270 is attached to the rear plate part 232. When formed, the male portion 264 is prevented from advancing by contacting the surface of the rear plate portion 232 in the locked position.

  The button 262 is always in the locked position as shown in FIG. In this state, since the male portion 264 is prevented from moving forward by the base portion 240, the front plate portion 230 can be bent even if the wearer pushes the button 262 together with the front plate portion 230 in the locked position. Therefore, the connection between the third-stage shell segment 24 and the fourth-stage shell segment 26 is maintained without being released.

  Therefore, as long as the button 262 is in the locked position, even if the wearer accidentally presses the front plate portion 230, the front plate portion 230 cannot be bent. The connection with the eye shell segment 26 is not broken.

  After that, when the button 262 is slid by the wearer from the locked position to the unlocked position, the male part 264 slides and approaches the female part 270, and eventually enters the female part 270, whereby the male part 264 Advance is allowed. As a result, when the wearer tries to push the button 262 together with the front plate portion 230 in the unlocked position, the front plate portion 230 can be bent, and thus the lower engagement convex portion 250 is in the fourth step. The upper engagement recess 252 of the shell segment 26 is detached. As a result, the connection between the third-stage shell segment 24 and the fourth-stage shell segment 26 is released.

  As shown in FIG. 13 (c), the rear plate portion 232 has two rails 280 and 280 extending parallel to each other in the vertical direction on the back surface thereof, and these rails 280 and 280 are shown in FIG. As described above, the two slots 282 and 282 extending in parallel with each other in the vertical direction on the surface of the upper connecting portion 212 are slidably fitted. As a result, the second-stage shell segment 22 and the third-stage shell segment 24 are guided so as to be relatively movable in the vertical direction.

  As shown in FIG. 11, two slots 290 and 290 extending in parallel with each other in the vertical direction are formed on the surface of the lower connecting portion 214, and are further slidably fitted into the slots 290 and 290. Two rails 292 and 292 are formed on the back surface of the fourth-stage shell segment 26. As a result, the third-stage shell segment 24 and the fourth-stage shell segment 26 are guided so as to be relatively movable in the vertical direction.

  12 and 14 show the upper connecting portion 212 in a perspective view and a sectional view.

  Similar to the lower connection portion 214, the upper connection portion 212 includes a main body portion 300 and a support portion 302 that is locally formed on the second-stage shell segment 22 as separate parts. Is attached to the support portion 302, whereby the upper connecting portion 212 is configured.

  As shown in FIGS. 12 and 14, the support portion 302 includes a base portion 310 fixed to the second-stage shell segment 22, and the base portion, like the support portion 222 of the lower connection portion 214. The main body 300 is inserted into the recess so as to almost completely complement the recess. As a result, as shown in FIG. 11, the surface of the main body 300 has the same cross-sectional shape as the surface of the portion adjacent to the main body 300 in the second-stage shell segment 22.

  As shown in FIG. 14, the main body 300 includes a center portion 330 as a movable portion, and two side portions 332 and 332 as fixed portions, which sandwich the center portion 330 from both left and right sides. Both of these side portions 332 and 332 are fixed to the base portion 310, and thus fixed to the second-stage shell segment 22.

  As shown in FIGS. 12, 14 (c), and 14 (f), the main body 300 further includes a support portion 340 that supports the center portion 330 so as to be rotatable around a horizontal axis.

  An example of the support portion 340 is a protrusion 342 extending from a substantially central portion in the height direction of the center portion 330 toward the base portion 310 as shown in FIG. With the contact point between the projection 342 and the base portion 310 as a fulcrum, the center portion 330 can rotate around the horizontal axis.

  Another example of the support 340 is a shaft extending in the horizontal axis direction across the center portion 330 and the two side portions 332 and 332, and the center portion 330 and the two side portions 332 and 332 can be rotated relative to each other. To be linked.

  As a result, the center portion 330 can rotate about the horizontal axis with respect to the base portion 310, and can further rotate about the horizontal axis with respect to the first and third shell segments 20 and 24. It is.

  The center portion 330 has a pair of ends that are opposed to each other across the horizontal axis, that is, an upper end and a lower end, both of which are free ends. These ends are displaced in opposite directions when the center portion 330 rotates in one direction around the horizontal axis.

  As shown in FIGS. 12 and 14, when the main body 300 is mounted on the support 302, the upper end of the center portion 330 is adjacent to the lower part of the first-stage shell segment 20, The lower end portion of the center portion 330 is adjacent to the upper portion of the lower connecting portion 214 attached to the third-stage shell segment 24.

  An upper engagement recess 350 is formed on the back surface of the upper end portion of the center portion 330. The lower engagement convex portion 352 of the first-stage shell segment 20 is engaged with the upper engagement recess 350 in a locked state, whereby the first-stage shell segment 20 and the second-stage shell segment 20 are engaged. 22 are connected to each other. The lower engaging protrusion 352 protrudes in the same direction as the direction indicated by the arrow C in FIG. Due to the engagement between the upper engagement concave portion 350 and the lower engagement convex portion 352, the first-stage shell segment 20 and the second-stage shell segment 22 may be relatively displaced in the height direction. Be blocked. Therefore, the combination of the upper engaging concave portion 350 and the lower engaging convex portion 352 constitutes an example of the “coupling mechanism” in the present invention.

  Further, the lower engagement convex portion 246 is formed on the surface of the lower end portion of the center portion 330. The lower engaging convex portion 246 engages with the upper engaging concave portion 244 of the lower connecting portion 214 in a locked state, whereby the second-stage shell segment 22 and the third-stage shell segment 24 are Are connected to each other. The lower engaging protrusion 246 protrudes in the direction opposite to the direction indicated by the arrow B in FIG.

  Further, although not shown, the upper connecting portion 212 has a biasing portion that always biases the center portion 330 in a direction in which this connected state is established. The urging portion may be, for example, an elastic member whose both ends are fixed between the center portion 330 and the side portion 322 or the base portion 310 (for example, a coil spring or a plate wound around a shaft extending coaxially with the horizontal axis) Spring).

  This connected state is a state that is established when there is an initial state in which no external force is received from the wearer. In this initial state, the lower engaging convex portion of the first shell segment 20 is placed in the upper engaging concave portion 350. 352 is engaged in the locked state, and the lower engaging convex portion 246 is engaged with the upper engaging concave portion 244 of the lower connecting portion 214 attached to the third-stage shell segment 24 in the locked state. In addition, the dimensional relationship of related members is preset.

  From this connected state, the wearer displaces the center portion 330 and, as shown in FIG. 14 (f), the lower end portion is displaced inward (direction indicated by arrow B in the figure) from the third-stage shell segment 24. On the other hand, when the upper end is rotated in one direction so that the upper end is displaced outward from the first-stage shell segment 20 (the direction indicated by arrow C in the figure), the upper engagement recess 350 is moved to the first-stage The lower engagement convex portion 352 of the shell segment 20 and the lower engagement convex portion 246 of the lower connecting portion 214 attached to the third-stage shell segment 24. Leaving 244 occurs substantially simultaneously.

  Thereby, the connection between the first-stage shell segment 20 and the second-stage shell segment 22 and the connection between the second-stage shell segment 22 and the third-stage shell segment 24; Are released at substantially the same time. In this released state, the three adjacent shell segments 20, 22, and 24 can be telescopically moved in the contraction direction by the wearer, thereby allowing the transition from the stretched state to the contracted state. It is. Furthermore, the three adjacent shell segments 20, 22 and 24 can be telescopically moved by the wearer in the direction of extension, and thereby moved from the contracted state to the extended state.

  From this released state, the wearer rotates the center portion 330 in the direction opposite to the direction shown in FIG. 14F (the force applied by the wearer to the center portion 330 is reduced because the biasing portion exists). Then, the center portion 330 attempts to automatically restore due to the elastic force of the biasing portion), and the upper engagement recess 350 is locked to the lower engagement projection 352 of the first-stage shell segment 20. Engaging in the state, and engaging the lower engaging convex portion 246 in a locked state with the upper engaging concave portion 244 of the lower connecting portion 214 attached to the third-stage shell segment 24. At substantially the same time so that the connection between the first stage shell segment 20 and the second stage shell segment 22 and the second stage shell segment 22 and the third stage shell segment 22 The connection with the segment 24 It is done qualitatively at the same time.

  As shown in FIG. 12, the upper connecting portion 212 has a safety device 260 for preventing a wearer from operating incorrectly, like the lower connecting portion 214. Specifically, as shown in FIG. 14, the safety device 260 includes a button 262, a male part 264 that moves integrally with the button 262, and the male part 264, as with the lower connection part 214. The slot 266 is slidably guided in the horizontal direction, and has a biasing portion (not shown) that elastically biases the male portion 264 toward the lock position.

  Further, like the lower connecting portion 214, the safety device 260 does not face the male portion 264 of the button 262 in the locked position of the button 262, but faces the male portion 264 of the button 262 in the unlocked position. It has a female portion 270 that allows the male portion 264 to enter and allows the male portion 264 to advance. As a result, the button 262 is prevented from moving forward in the locked position and the center portion 330 is also prevented from rotating, while in the unlocked position, advancement is permitted and the center portion 330 is allowed to rotate. Is done.

  The button 262 is always in the locked position as shown in FIG. In this state, the advancement of the male part 264 is prevented by the base part 310, so that even if the wearer pushes the button 262 together with the center part 330 in the locked position, the center part 330 cannot rotate, and therefore 1 The connection between the second-stage shell segment 20 and the second-stage shell segment 22 and the connection between the second-stage shell segment 22 and the third-stage shell segment 24 are not released. Maintained.

  Therefore, as long as the button 262 is in the locked position, even if the wearer accidentally presses the center portion 330, the center portion 330 cannot be rotated, so the first-stage shell segment 20 and the second-stage shell segment The connection between the second-stage shell segment 22 and the third-stage shell segment 24 does not have to be released.

  After that, when the button 262 is slid by the wearer from the locked position to the unlocked position, the male part 264 slides and approaches the female part 270, and eventually enters the female part 270, whereby the male part 264 Advance is allowed. As a result, when the wearer tries to push the button 262 with the center portion 330 in the unlocked position, the center portion 330 can rotate in the release direction, so that the upper engagement recess 350 is in the first shell segment. 20, the lower engaging convex portion 246 is disengaged from the upper engaging concave portion 244 of the lower connecting portion 214 attached to the third-stage shell segment 24. As a result, the connection between the first-stage shell segment 20, the second-stage shell segment 22, and the third-stage shell segment 24 is released.

  Although not shown, two slots extending in parallel with each other in the vertical direction are formed on the surface of the first-stage shell segment 20, and two rails slidably fitted into these slots are connected to the upper side. It is formed in the part 212. As a result, the first-stage shell segment 20 and the second-stage shell segment 22 are guided so as to be relatively movable in the vertical direction.

  In the present embodiment, the number of the shell segments 20, 22, 24 and 26 is four, and the number of the connecting interfaces between them is three, but the upper connecting portion 212 and the lower connecting portion are three. The number of connecting parts is only two, such as the connecting part 214. This is because the lower connecting portion 214 selectively connects and disconnects the two shell segments, the third-stage shell segment 24 and the fourth-stage shell segment 26, while the upper connection portion 212. However, it is possible to selectively connect and release the three shell segments: the first-stage shell segment 20, the second-stage shell segment 22, and the third-stage shell segment 24. Because there is.

  Therefore, according to the present embodiment, the overall structure of the connecting mechanism 210 for connecting the shell segments 20, 22, 24, and 26 to each other can be simplified and the number of necessary parts can be easily reduced. .

  Furthermore, according to the present embodiment, the combination of the upper engagement concave portion 244 and the lower engagement convex portion 246 constitutes an example of the “coupling mechanism” in the present invention, and the lower engagement convex portion 250 The combination of the upper engagement recess 252 constitutes an example of the “connection mechanism” in the present invention, and the combination of the upper engagement recess 350 and the lower engagement protrusion 352 is the “connection mechanism” in the present invention. In cooperation with constructing an example of the helmet 200, the helmet 200 does not have to change the relative position between the plurality of segments in an unfolded state against an external force, thereby further strengthening the connection between the segments. As a result, the overall rigidity of the helmet 200 is improved.

  In this embodiment, rails and slots for guiding adjacent shell segments so as to be relatively movable in the height direction are installed in association with the connection mechanism 210. As shown in the first embodiment of the present invention, similarly to the locks 80, 82, and 84 (see FIG. 10) as the coupling mechanism, the effect of the operation of the coupling mechanism 210 is applied to a position distant from the coupling mechanism 210. It is possible to install without receiving.

<Third embodiment>

  A helmet 400 according to a third exemplary embodiment of the present invention will now be described with reference to FIGS. 15 and 16. However, since this helmet 400 has many elements in common with the helmet 10 according to the first embodiment described above, only different elements will be described in detail, and the common elements will be referred to with the same names or symbols. Thus, a duplicate description is omitted.

  As shown in FIG. 15, the shell 14 of the helmet 400 has four segments (movable members) 20 that can be relatively displaced in the height direction of the helmet 400, similarly to the shell 14 of the helmet 10 shown in FIGS. 5 and 6. , 22, 24, and 26 which are nested together to form a nested structure. In the present embodiment, the segment 20 is the first stage segment (an example of the uppermost segment), the segment 22 is the second stage segment (an example of the intermediate segment), and the segment 24 is the third stage segment. (Another example of the intermediate segment), and the segment 26 is the fourth stage segment (an example of the lowermost segment).

  As shown in FIGS. 1 and 15, the first-stage segment 20 has a main body portion 402 that has a disk shape that is convex outward in the center and concave inward, and is further illustrated in FIG. 15. As described above, a flange 404 extending outward from the outer peripheral edge of the main body 402 is provided. Further, as shown in FIGS. 1 and 15, the second-stage segment 22 has a main body portion 406 having a generally cylindrical shape (conical frustum shape), and further, as shown in FIG. The upper flange 408 extends outward from the upper outer peripheral edge, and the lower flange 410 extends outward from the lower outer peripheral edge of the main body 406.

  Similarly, as shown in FIGS. 1 and 15, the third stage segment 24 has a main body portion 412 having a generally cylindrical shape (conical frustum shape), and further, as shown in FIG. 15, the main body portion 412. The upper flange 414 extends outward from the upper outer peripheral edge of the main body 412 and the lower flange 416 extends outward from the lower outer peripheral edge of the main body portion 412. Similarly, as shown in FIGS. 1 and 15, the fourth-stage segment 26 has a main body 418 having a generally cylindrical shape (conical frustum shape), and further, as shown in FIG. The upper flange 420 extends outward from the upper outer peripheral edge of the main body 418 and the lower flange 422 extends outward from the lower outer peripheral edge of the main body 418.

  As shown in FIG. 15A, when the helmet 400 is deployed, the upper surface of the flange 404 of the first stage segment 20 contacts the lower surface of the upper flange 408 of the second stage segment 22, and the second stage segment. 22 is in contact with the lower surface of the upper flange 414 of the third stage segment 24, and the upper surface of the lower flange 416 of the third stage segment 24 is the lower surface of the upper flange 420 of the fourth stage segment 26. Touching.

  As a result, the four segments 20, 22, 24 and 26 can be deployed in a posture adjacent to each other without any gap in the height direction. The unfolded state means the limit at which the segments 20, 22, 24 and 26 are separated from each other in the height direction, that is, the maximum height state.

  As shown in FIG. 15, the helmet 400 includes a connection mechanism 440 that connects the four segments 20, 22, 24, and 26 adjacent to each other. The coupling mechanism 440 mechanically engages the adjacent segments 20, 22, 24, and 26, respectively, in the deployed state of the helmet 400, so that the adjacent segments 20, 22, 24, and 26 are in the helmet. The relative displacement in the height direction of 400 is mechanically prevented. This connection mechanism 440 selectively exhibits a relative displacement prevention function only in the unfolded state.

  In order to realize such a function, the coupling mechanism 440 is a flexible member extending between the first stage segment 20 and the fourth stage segment 26 along the inner surfaces of the four segments 20, 22, 24 and 26. It has a longitudinal member 450 (having flexibility). The longitudinal member 450 is configured to have, for example, a material characteristic that can be elastically bent but hardly elastically stretch in the length direction. This longitudinal member 450 is an example of the “continuum” in the present invention.

  The longitudinal member 450 can be formed of, for example, a synthetic resin (for example, PE or PP) or a metal. In the present embodiment, the longitudinal member 450 is formed as a band-shaped member as shown in FIG. 15B, but is not limited to this, for example, one or a plurality of linear members. Or a single or a plurality of rod-shaped members, or a member in which a plurality of elements arranged in a line in the longitudinal direction of the longitudinal member 450 are coupled to each other.

  As shown in FIG. 15A, the elongated member 450 includes an innermost end portion 460 located in the first-stage segment 20 and an intermediate portion 462 located in the second-stage segment 22 when the helmet 400 is deployed. And an intermediate portion 464 located in the third-stage segment 24 and an outermost end portion 466 located in the fourth-stage segment 26.

  The coupling mechanism 440 further includes a plurality of female portions (may be male portions) (an example of “a plurality of first engaging portions” in the present invention) 480 provided on the longitudinal member 460. The female portions 480 are configured such that the relative position in the length direction with respect to the longitudinal member 460 does not change.

  Only one elongate member 460 may be installed for one helmet 400, but a plurality of elongate members 460 may be installed.

  When a plurality of longitudinal members 460 are installed, for example, a connecting tool (not shown) that connects a plurality of innermost ends 460 respectively corresponding to the longitudinal members 460 may be provided. With this connecting tool, as will be described later, the work of lifting the plurality of longitudinal members 450 from the inner surface of the helmet 400 (release work) becomes easier than without this connecting tool.

  For example, the connector may be a ring-shaped member common to the innermost ends 460 to which the plurality of innermost ends 460 are attached, or the innermost ends 460 to which the plurality of innermost ends 460 are attached. It is possible to use a common plate.

  Some examples of such plates include a dedicated plate or a reverse hammock harness inside the helmet 400 (for example, a shock absorbing harness or a helmet 400 that facilitates holding the helmet 400 to cover the wearer's head) There is a plate that also serves as a plate that is mounted to connect a plurality of straps that constitute an interior body). In the latter example, both ends of the plurality of straps are connected to the shell 14 and the plate, respectively.

  The coupling mechanism 440 further includes a plurality of male parts (may be female parts) provided in the first stage segment 20, the second stage segment 22, and the third stage segment 24 (“a plurality of second relations” in the present invention). 490) which is an example of “joint part”. The male portions 490 are configured such that the relative positions in the height direction do not change with respect to the corresponding segments 20, 22, and 24, respectively.

  As shown in FIG. 15 (a), these male parts 490 engage with a plurality of female parts 480 in a locked state as shown in FIG. 15 (a), but in the retracted state, as shown in FIG. 15 (c). , Respectively, from the plurality of female portions 480.

  The coupling mechanism 440 further couples the outermost end 466 and the fourth-stage segment 26 of the longitudinal member 450 to each other so as to be rotatable and non-separable relative to each other both in the deployed state and in the retracted state. The pivot portion 500 (an example of the “third engagement portion” in the present invention) is included.

  The pivot portion 500 pivotally connects the elongate member 450 to the four segments 20, 22, 24 and 26 in a vertical plane, both in the deployed state and in the retracted state.

  As shown in FIG. 16, the pivot portion 500 specifically includes a movable portion 502 fixed to the outermost end portion 466 of the longitudinal member 450 and a fourth-stage segment 26 (for example, the outer flange 422). And a receiving portion 504 fixed to a part thereof. The movable part 502 is connected to the receiving part 504 by a pin or the like so that the movable part 502 can rotate and cannot be detached. The axis of rotation (for example, the center line of the pin) is set to be parallel to a tangent to the outer peripheral edge of the shell 14. Thanks to the pivot portion 500, the longitudinal member 450 is connected to the fourth-stage segment 26 so as to be capable of pivoting in a vertical plane (a plane parallel to the paper surface of FIG. 15A) and inseparable.

  The coupling mechanism 440 further includes a plurality of guides 510 as shown in FIGS. 15 and 16. Each guide 510 allows the longitudinal member 450 to move in the length direction while preventing the longitudinal member 450 from moving in the width direction of the helmet 400 in the deployed state of the helmet 400.

  Specifically, as shown in FIG. 16, each guide 510 is moved from the release position (stored state) shown in FIG. 15C when the helmet 400 is moved from the stored state to the deployed state. FIG. 15A shows a pair of vertical walls 512 and 512 that guide the transition to the locked position (deployed state) shown in FIG. 15A and that face each other in the width direction of the longitudinal member 450.

  As shown in FIG. 16, a portion of each guide 510 through which the longitudinal member 450 passes, that is, a guide hole is opened on the upper surface thereof, whereby the guides of the longitudinal member 450 to each guide 510 are opened. Attaching / detaching is possible.

  The guides 510 are provided at the first stage segment 20 (for example, at the same position as the boundary line between the main body portion 402 and the flange 404, that is, the bending point on the inner surface of the first stage segment 20 or in the vicinity thereof). And a guide 510 provided on the second stage segment 22 (for example, at the same position as the boundary line between the main body 406 and the lower flange 410, that is, the bending point on the inner surface of the second stage segment 22). A guide 510 provided on the third stage segment 24 (for example, at the same position as or near the bending point on the inner surface of the third stage segment 24, that is, the boundary line between the main body portion 412 and the lower flange 416). Have.

  As shown in FIGS. 15 (a) and 15 (b), in the unfolded state of the helmet 400, the elongated member 450 is arranged in a posture that is substantially in close contact with the inner surface of the shell 14, and at that time, a plurality of female portions 480 are disposed. A plurality of male portions 490 engage with each other in a locked state.

  The coupling between the female portion 480 and the male portion 490 corresponding to the first-stage segment 20 (hereinafter referred to as “male-male coupling between the first-stage segment 20 and the elongated member 450”, hereinafter the same), and the second-stage The relative displacement between the first stage segment 20 and the second stage segment 22 is prevented by the male and female coupling between the segment 22 and the longitudinal member 450.

  Furthermore, the second-stage segment 22 and the third-stage segment 24 are obtained by the male and female coupling between the second-stage segment 22 and the elongated member 450 and the male-female coupling between the third-stage segment 24 and the elongated member 450. The relative displacement between is prevented.

  Furthermore, a male and female coupling between the third stage segment 24 and the elongated member 450 and a pivot coupling between the fourth stage segment 26 and the outermost end portion 466 of the elongated member 450 provide a third stage. Relative displacement between the segment 24 and the fourth stage segment 26 is prevented.

  As a result, the relative position between the four segments 20, 22, 24 and 26 is fixed, thereby improving the overall rigidity of the shell 14 compared to the case where neither the above-described male-male coupling nor the pivot coupling exists.

  When it is necessary for the wearer to store the helmet 400, the wearer first holds the innermost end 460 of the longitudinal member 450 (for example, the operation portion of the innermost end 460) by hand and lifts it up. (For example, it is possible to pull and lift the above-mentioned connecting tool), and then the entire longitudinal member 450 is lifted from the inner surface of the helmet 400 by the pivot movement. Thereby, the plurality of female portions 480 are detached from the plurality of male portions 490, respectively.

  As a result, the four segments 20, 22, 24, and 26 can be displaced relative to each other, and in this state, the wearer compresses the segments 20, 22, 24, and 26 with respect to each other, whereby the segments 20, 22, 24 and 26 contract telescopically. Thereby, the segments 20, 22, 24 and 26 are stored in each other. Thereby, the helmet 400 shifts to the retracted state.

  In contrast, when the wearer needs to unfold the helmet 400, the wearer first stretches the four segments 20, 22, 24, and 26 so that the segments 20, 22, 24, and 26 are telescopic. Stretch. In this state, the wearer presses the entire longitudinal member 450 against the inner surface of the helmet 400 by the pivot motion. Thereby, the plurality of female portions 480 engage with the plurality of male portions 490 in a locked state, respectively.

  As a result, relative displacement of the segments 20, 22, 24, and 26 is prevented, whereby the helmet 400 shifts to a fully deployed state, and the plurality of female portions 480 are locked to the plurality of male portions 490, respectively. As long as the helmet 400 is engaged, the helmet 400 is maintained in the fully deployed state against the external force.

  As is clear from the above description, according to the present embodiment, thanks to the coupling mechanism 440, the helmet 400 can be compared between the four segments 20, 22, 24, and 26 against an external force in the fully deployed state. The position does not need to change drastically, thereby providing a stronger connection between the segments 20, 22, 24 and 26 and, as a result, improving the overall rigidity of the helmet 400.

<Fourth embodiment>

  Next, a helmet 600 according to a fourth exemplary embodiment of the present invention will be described with reference to FIG. However, since this helmet 600 has many elements in common with the helmet 400 according to the third embodiment described above, only different elements will be described in detail, and the common elements will be referred to with the same name or reference numeral. Thus, a duplicate description is omitted.

  As shown in FIG. 15, in the above-described third embodiment, in order to store the helmet 400, all the female parts 480 are respectively moved by manually lifting the entire longitudinal member 450 from the inner surface of the helmet 400. Although it is intended to be manually detached (manually released) from the corresponding male part 490, this is not essential for practicing the present invention.

  As shown in FIG. 17, in the present embodiment, each mounting tool 610 of the coupling mechanism 440 places the longitudinal member 450 on the inner surface of the helmet 600 in a state in which it cannot be detached from the inner surface (for example, the longitudinal member 450). In a state where it cannot be removed in both the width direction and the thickness direction).

  FIG. 17A is a cross-sectional view showing the four segments 20, 22, 24, and 26 of the helmet 600 in an intermediate storage state (a state in which a transition is made from a fully deployed state to a fully stored state). FIG. 17B is a cross-sectional view showing the segments 20, 22, 24 and 26 in a fully retracted state. FIG. 17C is a perspective view representatively showing one of the plurality of mounting tools 610 of the coupling mechanism 440.

  In the present embodiment, when the helmet 600 is deployed, the longitudinal members 450 are held by a plurality of wearing tools 610 fixed on the inner surface of the helmet 600 so as to be discretely arranged in the longitudinal direction thereof. Is done. When the helmet 600 is stored, the continuous elongated member 450 has a plurality of bending portions (from other bending portions) so that the contact point with each wearing tool 610 is a joint point (constraint point) in kinematics. It is divided into flexible parts that perform independent motion.

  In order to specifically describe these bent portions, the bent portion located on the right side in the drawing with respect to the mounting tool 610 located in the first-stage segment 20 in the longitudinal member 450 is the innermost end portion 460. Of the longitudinal member 450, a bent portion sandwiched between the mounting tool 610 located in the first stage segment 20 and the mounting tool 610 located in the second stage segment 22 is an intermediate part 462. Of the longitudinal member 450, a bent portion sandwiched between the mounting tool 610 located in the second stage segment 22 and the mounting tool 610 located in the third stage segment 24 is an intermediate part 464. Of the longitudinal member 450, the outermost end portion 466 is a bent portion sandwiched between the mounting tool 610 located in the third stage segment 24 and the pivot portion 500 located in the fourth stage segment 26.

  Each wearing tool 610 that functions as a joint point (constraint point) for the longitudinal member 450 is a portion of the longitudinal member 450 that contacts each joint point (of the four flexible portions 460, 462, 464, and 466, each other). Constrains the movement of adjacent points), but does not constrain the movement of other parts.

  Therefore, each of the flexible portions 462 and 464 sandwiched between two adjacent fittings 610, that is, two joint points adjacent to each other, has its own flexibility (it is somewhat elastically stretchable in the length direction). It is possible to approach and separate from the inner surface of the helmet 600 by a bending / extending motion using

  On the other hand, the bent portion 466 is sandwiched between the mounting tool 610 corresponding to the third stage segment 24 and the pivot portion 500. Therefore, in the bent portion 466, the portions that contact the wearing tool 610 and the pivot portion 500 are restrained, but the movement of the portion sandwiched between these two restraining points is not restrained, and the flexibility still remains. Have.

  In the present embodiment, the fully deployed state of the helmet 600 is the same as that shown in FIG. 15A, and in this fully deployed state, the respective bent portions 460, 462, 464, 466 are in a natural state (no load state). ) And extends almost straight. At this time, the outermost end 466 has an angle extending substantially along the inner surface of the fourth stage segment 26.

  On the other hand, in the halfway storage state of the helmet 600, as shown in FIG. 17A, the four segments 20, 22, 24 and 26 are closer to each other than in the fully deployed state. In conjunction with the approaching operation, the linear distance between the male parts 490 and 490 adjacent to each other and the linear distance between the male parts 490 and the pivot part 500 adjacent to each other are reduced more than in the fully deployed state. In conjunction with the decrease in the distance, the linear distance between the female parts 480 and 480 adjacent to each other and the linear distance between the female part 490 and the pivot part 500 adjacent to each other are also reduced in the fully deployed state.

  As a result, an axial compressive force acts on each of the bent portions 462, 464, 466, and as a result, each of the bent portions 462, 464, 466 is bent more inwardly in the fully deployed state. The elongate member 450 is designed such that each flexible portion 462, 464, 466 bends inward when it is compressed axially. An example of such a design is a bending inducing portion such as a notch or a notch formed inwardly at a portion corresponding to each joint point of the elongated member 450.

  As a result, the frictional force between the respective bending portions 462, 464 and 466 at the respective joint points and the respective mounting tools 610 is increased more than in the fully-deployed state, thereby the movement of each bending portion 462, 464 and 466 (in particular, The movement of the longitudinal member 450 in the length direction and the movement in the thickness direction) is substantially locally restrained by each wearing tool 610 at each joint point.

  As each deflected portion 462, 464, 466 is deflected more inwardly in the fully deployed state, the gap between each deflected portion 462, 464, 466 and the corresponding segment 20, 22, 24, 26 is completely complete. More than in the deployed state. Thereby, the female portion 480 corresponding to each of the bent portions 462 and 464 is facilitated to be partially or completely detached from the corresponding male portion 490.

  The innermost end portion 460 is bent inward by the wearer's hand picking and lifting the tip (for example, the operation portion) by hand, so that the corresponding female portion 480 becomes the corresponding male portion. Leave from 490. This completely releases all male and female connections for the elongated member 450 manually. At this time, the outermost end 466 has a larger angle with respect to the inner surface of the fourth stage segment 26 in the fully deployed state.

  In the fully retracted state of the helmet 600 shifted from the above-described midway storage state, as shown in FIG. 17B, the four segments 20, 22, 24, and 26 are closer to each other than in the midway storage state, The linear distance between the joint points of the flexures 462, 464, and 466 is less than in the halfway retracted state, thereby deflecting each flexure 462, 464, and 466 inward than in the midway stowed state. At this time, each of the bent portions 462 and 464 completely separate from the corresponding male portion 490.

  The male part 490 corresponding to each flexible part 460, 462, 464 acts to push and bend each flexible part 460, 462, 464 from the back surface of each flexible part 460, 462, 464, and as a result, each flexible part 460. , 462, 464 are further facilitated to bend inwardly. At this time, the outermost end 466 has a larger angle with respect to the inner surface of the fourth stage segment 26 in the halfway retracted state.

  As shown in FIG. 17C, each mounting tool 610 has a guide hole 612. The guide hole 612 is a closed hole. For example, the guide hole 612 may be a hole that is partially opened on the upper surface and / or the side surface as long as the elongate member 450 is not easily detached from each mounting tool 610 in the thickness direction. Due to the partial opening, both the holding of the elongate member 450 and the insertion of the elongate member 450 into each guide hole 612 are realized.

  Thus, in this embodiment, the wearer first causes the four segments 20, 22, 24 and 26 to approach each other in order to retract the helmet 600, thereby causing each flexion of the longitudinal member 450 to be retracted. The portions 460, 462, 464, and 466 are bent in a direction away from the inner surface of the helmet 600, and as a result, the engagement between the female portion 480 and the male portion 490 corresponding to each other is released.

  Eventually, if all the female parts 480 are separated from the corresponding male parts 490, a more free relative displacement between the four segments 20, 22, 24 and 26 of the shell 14 becomes possible. In this state, the wearer can retract the helmet 400 by compressing the segments 20, 22, 24, and 26 with each other.

  As is clear from the above description, according to the present embodiment, regardless of whether the helmet 600 is in the retracted state or in the deployed state, the longitudinal member 450 extends substantially over the entire length of the longitudinal member 450 on the inner surface of the helmet 600. As a result, the accommodating property of the longitudinal member 450 is improved.

  Further, according to the present embodiment, the innermost end portion 460 of the longitudinal member 450 is released from the inner surface of the helmet 600 (that is, the male-female connection related to the first-stage segment 20 is released) by the wearer. If done manually, the release of other parts of the elongated member 450 from the inner surface of the helmet 600 (i.e., the release of the male-female connection associated with the second stage segment 22 and the third stage segment 24). This is automatically performed in accordance with the contraction operation (storage operation) of the four segments 20, 22, 24 and 26 by the wearer.

  Therefore, according to the present embodiment, the work that the wearer needs to perform on the helmet 600 in order to store the helmet 600 may be reduced more than in the third embodiment.

  Further, according to the present embodiment, from the viewpoint of material mechanics, the longitudinal member 450 is formed by combining the four mounting tools 490 and the pivot portion 500 to form a plurality of elements (that is, four flexible portions 460, 462, 464, and 466). ). As a result, in the longitudinal member 450, bending (or buckling) due to the contraction operation of the four segments 20, 22, 24, and 26 occurs in each element unit.

  As a result, a bending force generated in each element (a force acting on each element in the bending direction and separating each element from the inner surface of the shell 14) is generated in the longitudinal member 450 without being divided into the elements. It is presumed that there is a tendency to increase more than the bending force. If so, it is estimated that the female part 480 and the male part 490 corresponding to each other are more reliably detached.

  However, the effect of automatic release of the longitudinal member 450 can be realized even if there is a difference in degree even if the longitudinal member 450 is not divided into a plurality of elements using the mounting tool 490.

  Furthermore, according to the present embodiment, regardless of whether the helmet 600 is in the deployed state or in the retracted state, the longitudinal member 450 as a continuous body is attached to the four segments 20, 22, 24 and 26. Is maintained, thereby preventing the segments 20, 22, 24, and 26 from being scattered apart in the process of approaching each other. That is, the four segments 20, 22, 24, and 26 always form one collection.

  By the way, in the present embodiment, the outermost end portion 466 of the longitudinal member 450 is connected to the fourth stage segment 26 so as not to be separable and pivotable, but it is indispensable to implement the present invention in this way. For example, the present invention can be implemented in such a manner that it can be separated and connected to the fourth-stage segment 26 in a state where the limit of access to the central portion of the helmet 600 is limited. This is because the longitudinal member 450 is attached to the remaining segments 20, 22, and 24 in an unseparable manner at other sites.

<Fifth embodiment>

  Next, a helmet 800 according to a fifth exemplary embodiment of the present invention will be described with reference to FIG. However, since this helmet 800 has many elements in common with the helmets 10, 200, 400, and 600 according to the first to third embodiments, only different elements will be described in detail, and the common elements have the same names. Or, a duplicate description is omitted by citing with reference numerals.

  The helmet 800 according to the present embodiment is a telescopic telescopic type having four segments 20, 22, 24, and 26 that can be displaced from each other, like the helmets 10, 200, 400, and 600 according to the first to fourth embodiments. Shell 14.

  The helmet 800 has an elastic telescopic interior body 810 attached to the inside of the shell 14. As is well known, the interior body 810 has a function of directly contacting the wearer's head and promoting the helmet 800 to be held by the wearer's head. The interior body 810 can also be applied to the helmets 10, 200, 400 and 600 according to the first to third embodiments described above.

  First, the interior body 810 will be contracted and flattened by its own elasticity as shown in FIG. 18 (a) when the helmet 800 is not attached to the wearer's head. Although in the retracted state, when the helmet 800 is worn on the wearer's head, the wearer's head is locally pushed into the interior body 810 as shown in FIG. By pulling 810, it shifts to the unfolded unfolded state so as to follow the shape of the wearer's head.

  More specifically, the inner body 810 is connected to some of the outer edges of the shell 14 at several of its outer edges, whereby the inner body 810 is The shell 14 is supported in a floating state at the center.

  The interior body 810 has an upper support 812 that contacts the top of the wearer's head when the helmet 800 is worn. For example, an impact absorbing material is disposed on the back surface of the upper support 812, and one end portions (end portions not restrained by the shell 14) of the plurality of straps described above are connected.

  The interior body 810 further includes a front pad 820 that comes into contact with the wearer's forehead when the helmet 800 is worn, a rear pad 822 that comes into contact with the back of the head, and a pair of sides that touch the left and right side of the head. -It has pads 824 and 824.

  A lower end portion of the front pad 820 is pivotally connected to a corresponding portion of the shell 14 via a rotary hinge 830. On the other hand, the upper end portion of the front pad 820 is connected to the front portion of the upper support 812 in a bendable manner via a net-like connecting tool 832 that can be expanded and contracted and a flexible hinge 834.

  The upper end portion of the rear pad 822 is connected to the rear portion of the upper support 812 via a flexible hinge 836 so as to be bent. On the other hand, the lower end portion of the rear pad 822 is pivotally connected to a corresponding portion of the shell 14 via an extendable net-like connector 838 and a rotary hinge 840.

  A lower end portion of each side pad 824 is pivotally connected to a corresponding portion of the shell 14 via a rotary hinge 842. On the other hand, the upper end portion of each side pad 824 is connected to the side portion of the upper support 812 in a bendable manner via an extendable net-like connector 844 and a flexible hinge 846.

  Therefore, according to the present embodiment, when the wearer takes off the helmet 800, first, the interior body 810 automatically contracts and shifts to a flat retracted state. The wearer then telescopically shrinks the helmet 800, thereby causing the helmet 800 to retract.

  On the other hand, when wearing the helmet 800 from now on, the wearer first stretches the helmet 800 in a telescopic manner, thereby unfolding the helmet 800. Thereafter, the wearer wears the helmet 800, and then the interior body 810 automatically expands and shifts to a depressed state.

  As a result, according to the present embodiment, the wearer does not need to perform a complicated operation of deploying or storing the interior body 810 depending on whether the helmet 800 is in the expanded state or in the retracted state. Thereby, the usability of the helmet 800 is improved.

  In addition, in some embodiments described above, in the deployed state of each helmet 10, 200, 400, 600, the limit that the four segments 20, 22, 24, and 26 are separated from each other upward (deployed). In addition to being limited by the structure of the segments 20, 22, 24 and 26 themselves (the overlapping of the aforementioned flanges), the limit between the segments 20, 22, 24 and 26 Both the unscheduled separation (deployment beyond the deployment limit) and approach (storage beyond the storage limit), that is, the upward and downward bi-directional movements in the height direction are connected to each coupling mechanism 40, 42, 44. , 210, 440.

  That is, in the unfolded state of each helmet 10, 200, 400, 600, unscheduled separation between the segments 20, 22, 24, and 26 (deployment exceeding the unfolding limit) causes each coupling mechanism 40, 42, 44, 210 and 440 and each coupling mechanism 40, 42, 44, 210 and 440 are blocked by another mechanism (for example, the structure of the segments 20, 22, 24 and 26 themselves).

  On the other hand, according to the present invention, unscheduled separation between the segments 20, 22, 24, and 26 (deployment exceeding the deployment limit) is prevented only by the coupling mechanisms 40, 42, 44, 210, and 440. In an embodiment, unscheduled separation between the segments 20, 22, 24 and 26 (deployment beyond the deployment limit) is prevented by a mechanism separate from each coupling mechanism 40, 42, 44, 210, 440. However, unscheduled access between the segments 20, 22, 24, and 26 can also be implemented in a manner that is blocked only by each coupling mechanism 40, 42, 44, 210, 440.

<Sixth embodiment>

  Next, a helmet 900 according to a sixth exemplary embodiment of the present invention will be described with reference to FIG. However, since this helmet 900 has many elements in common with the helmet 600 according to the above-described fourth embodiment, only different elements will be described in detail, and the common elements will be referred to with the same names or symbols. Thus, a duplicate description is omitted.

  FIG. 19A is a cross-sectional view showing four segments of the helmet 900 according to the present embodiment together with the connecting mechanism 440 in the fully deployed state. FIG. 19B is a front view showing the connecting mechanism 440 together with a portion of the four segments 20, 22, 24 and 26 located around the connecting mechanism 440 in the fully deployed state. FIG. 19C is a cross-sectional view showing the four segments 20, 22, 24 and 26 of the helmet 900 together with the connecting mechanism 440 in the fully retracted state.

  In the helmet 600 shown in FIG. 17, the longitudinal member 450 is positioned at the innermost end portion 460, the two intermediate portions 462 and 464, and the outermost end portion 466 in the fully deployed state of the helmet 600. The respective segments 20, 22, 24, and 26 are engaged with each other in a locked state. Therefore, according to the helmet 600, relative displacement between the segments 20, 22, 24, and 26 is more reliable in the fully deployed state than when only a part of the four segments 20, 22, 24, and 26 is locked. This has the advantage that the overall rigidity of the helmet 600 is improved.

  On the other hand, in the helmet 900 according to the present embodiment, as shown in FIG. 19, the longitudinal member 450 has a longitudinal shape of an innermost end portion 460 and an outermost end portion 466 in the fully deployed state of the helmet 900. Only in the respective positions at both ends of the member 450, the corresponding segments 20 and 26 are locked (for example, the innermost end portion 460 is prevented from rotating in the longitudinal direction of the longitudinal member 450 while preventing relative rotation. In the completely locked state, that is, in the completely constrained state in which neither the width direction nor the thickness direction is relatively displaced, on the other hand, the outermost end portion 466 is also moved in the longitudinal direction of the longitudinal member 450 while allowing relative rotation. Engage in a quasi-complete lock state (ie, a quasi-completely constrained state) that does not relatively displace in the width direction or thickness direction.

  Therefore, according to the helmet 900, there is an advantage that the operation of the wearer is simplified and the usability is improved as compared with the case where all the segments 20, 22, 24 and 26 are locked in the fully deployed state. As shown in FIG. 19A, the plurality of guide members 510 that guide the longitudinal member 450 are the same as or near the lower ends of the corresponding segments 20, 22, and 24, unlike the helmet 600. Are arranged.

  The helmet 900 has a first connecting mechanism 910 that connects the four segments 20, 22, 24 and 26 constituting the shell 14 to each other.

  In the fully deployed state of the helmet 900, the first connecting mechanism 910 is configured such that adjacent ones of the four segments 20, 22, 24, and 26 are separated from each other in the height direction (that is, the helmet 900 is completely An operation that attempts to move from the expanded state to the opposite side of the fully retracted state, for example, a movement in which a segment moves upward relative to a segment below it in the fully expanded state) In the fully retracted state and the halfway retracted state of 900, adjacent ones of the four segments 20, 22, 24 and 26 approach each other in the height direction (that is, the helmet 900 changes from the partially retracted state to the fully deployed state. Or an operation to shift from the fully stored state to the halfway stored state, for example, In a fully retracted state, a segment moves upward relative to a segment below it, and separated (ie, when the helmet 900 attempts to move from a fully retracted state to a side opposite to a fully deployed state). Yes, for example, in a fully retracted state, a segment is allowed to move downward relative to a segment below it.

  In the present embodiment, the first coupling mechanism 910 is realized by a combination of flanges 404 and 408, 410 and 414, and 416 and 420 that are stacked on each other in the fully deployed state of the helmet 900.

  Specifically, for example, when the flange 404 of the uppermost segment 20 is disposed below the upper flange 4048 of the second-stage segment 22, the uppermost segment 20 is relatively positioned with respect to the second-stage segment 22. Moving further upward, that is, movement of the uppermost segment 20 approaching the second-stage segment 22 is prevented.

  The helmet 900 further includes a second connecting mechanism 920 that connects the four segments 20, 22, 24, and 26 to each other. In the present embodiment, the second coupling mechanism 920 includes a longitudinal member 450 having flexibility as a continuous body continuously extending from the uppermost segment 20 to the lowermost segment 26 along the inner surface of the helmet 900. This is realized by a combination of the female portion 480 fixed to the innermost end portion 460, the male portion 490 fixed to the uppermost segment 20, and the pivot portion 500.

  Specifically, in the fully deployed state of the helmet 900, the second connecting mechanism 920 includes a coupling between the female portion 480 and the male portion 490 in a locked state and a pivot portion, as shown in FIG. With the pivot coupling of 500, at least approach in the height direction between at least the uppermost segment 20 and the lowermost segment 26 (in the present embodiment, not only approach but also separation) is prevented.

  As shown in FIG. 17A, the second coupling mechanism 920 performs pivot coupling of the pivot portion 500 and coupling of the female portion 480 and the male portion 490 in the halfway retracted state of the helmet 900. Without being accompanied, it is performed alone, thereby permitting the approach and separation in the height direction between the four segments 20, 22, 24 and 26 adjacent to each other.

  In the fully retracted state of the helmet 900, the second coupling mechanism 920 is in the height direction between the four segments 20, 22, 24 and 26 adjacent to each other, as shown in FIG. It is configured to prevent at least separation.

  Specifically, in the second coupling mechanism 920, when the helmet 900 is fully retracted, as shown in FIG. 19C, the continuous longitudinal member 450 is composed of the uppermost segment 20 and the second-stage segment 22. And the three guide members 510 and the pivot portion 500 respectively fixed to the third stage segment 24 are bound and restrained substantially linearly on a plane substantially along a horizontal plane, whereby the four segments 20 and 22 are constrained. , 24 and 26 adjacent to each other in the height direction (that is, the movement of the helmet 900 from the fully retracted state to the side opposite to the fully deployed state) is prevented but approached ( In other words, (that is, the operation of the helmet 900 attempting to shift from the fully retracted state to the halfway retracted state) is permitted. It is.

  Specifically, for example, when the flange 404 and the guide member 510 of the uppermost segment 20 are separated downward from the second-stage segment 22, the flange 404 and the guide member 510 of the uppermost segment 20 are moved downward. Attempts to move downward from the surface are prevented by striking a longitudinal member 450 extending substantially horizontally.

  That is, in the present embodiment, the combination of the elongated member 450 and the three guide members 510 fixed to the uppermost segment 20, the second-stage segment 22, and the third-stage segment 24 respectively, A separation limit in the height direction between adjacent ones of 22, 24 and 26 is defined, whereby a fully retracted state of the helmet 900 is realized.

  As is clear from the above description, according to the present embodiment, one segment is located above the other segment in the fully deployed state of the helmet 900, thanks to the coexistence of the first and second coupling mechanisms 910 and 920. In addition, in the fully retracted state of the helmet 900, any segment is prevented from falling downward from the other segments.

  However, in this embodiment, even if only the first coupling mechanism 910 is present, in the fully deployed state of the helmet 900, any segment is prevented from separating upward from the other segments, but the second coupling mechanism 920, the uppermost segment 20 and the lowermost segment 26 are respectively locked by the longitudinal member 450 and the pivot portion 500, so that the overall rigidity of the helmet 900 is not present in the second coupling mechanism 920. Increase more.

<Seventh embodiment>

  Next, a helmet 1000 according to a seventh exemplary embodiment of the present invention will be described with reference to FIG. However, since this helmet 1000 has many elements in common with the helmet 600 according to the above-described fourth embodiment, only different elements will be described in detail, and the common elements will be referred to with the same name or symbol. Thus, a duplicate description is omitted.

  FIG. 20A shows a longitudinal member of the coupling mechanism 440 in a state where the hammock 102 of the helmet 1000 according to the present embodiment is partially removed from the helmet 100 and the shell 10 is fully deployed. FIG. 6 is an upper perspective view showing an innermost end portion 460 (for example, an upper end portion and an inner end portion) of a 450 (for example, a belt-like member extending straight in a plate-like cross section), a lock portion 1002, and an operation portion 1004. FIG. 20B is a perspective view showing the innermost end portion 460, the lock portion 1002, and the operation portion 1004 of the longitudinal member 450 taken out.

  Further, FIG. 20 (c) shows that the first stage segment 20, the second stage segment 22 and the hammock 102 of the helmet 1000 are partially and fully deployed, and the innermost end 460 of the longitudinal member 450, the lock FIG. 6 is a cross-sectional view shown together with a unit 1002 and an operation unit 1004.

  The hammock 102 is attached to the first stage segment 20 and is displaced integrally with the first stage segment 20. Specifically, the hammock 102 is made of a synthetic resin and is generally formed on a disk. The hammock 102 is firmly attached to the first-stage segment 20 at a plurality of locations (for example, 6 locations) on the periphery thereof. Fixed.

  In a state in which the helmet 1000 is worn by the wearer, the inner side surface (lower surface) of the hammock 102 contacts the top of the head of the wearer. In this state, the hammock 102 is suspended upward from the shell 10. Yes. Thus, the hammock 102 is also referred to as a reverse hammock because it is used in a posture opposite to that of a normal hammock.

  In the helmet 600 shown in FIG. 17, as described above, the elongated member 450 has the innermost end portion 460, the two intermediate portions 462 and 464, and the outermost end portion 466 in the fully deployed state of the helmet 600. In each position, it engages with the corresponding segment 20, 22, 24, 26 in a locked state.

  On the other hand, in the helmet 1000 according to the present embodiment, as in the helmet 900 shown in FIG. 19, the longitudinal member 450 has its innermost end portion 460 and outermost end portion 466 in the fully deployed state of the helmet 1000. Only at the respective positions at both ends of the longitudinal member 450, the uppermost segment 20 and the lowermost segment 26 corresponding to each other are locked (for example, the innermost end portion 460 can be The member 450 is in a completely locked state, that is, in a completely constrained state in which it is not relatively displaced in the length direction, the width direction, or the thickness direction, while the outermost end portion 466 has a longitudinal The member 450 is engaged in a quasi-complete lock state (ie, a quasi-completely constrained state) in which the member 450 is not relatively displaced in the length direction, width direction, or thickness direction.

  The helmet 1000 has a plurality of guides 510 as in the helmet 400 shown in FIGS. 15 and 16. Each guide 510 includes, for example, at least one of the first stage segment 20, the second stage segment 22, and the third stage segment 24 (for example, the plurality of segments 20, 22, 24 and 26 excluding the lowermost segment 26. One segment).

  Each guide 510 indicates that, in the deployed state of the helmet 1000, the longitudinal member 450 moves relatively slowly relative to the corresponding segments 20, 22, 24, 26 in the width direction and the thickness direction thereof. Allow it to move relative to its length while blocking. That is, each guide 510 restrains the portion of the longitudinal member 450 that passes through each guide 510 with respect to the position in the width direction and the position in the thickness direction of the longitudinal member 450, and the length of the longitudinal member 450. It is guided so as to be movable in the vertical direction.

  Specifically, after the longitudinal member 450 is attached to the plurality of segments 20, 22, 24, and 26, the helmet 1000 is surrounded by the longitudinal member 450 and each segment 20, 22, 24, 26. The relative position in the height direction of the helmet 1000 is allowed to change while the relative position in the direction and the relative position in the radial direction of the helmet 1000 are maintained. That is, the elongated member 450 is held on the inner surface of the helmet 1000 (that is, restrained) so as not to be displaced inward or in any circumferential direction from the segments 20, 22, 24, 26, and is long. It can move in the vertical direction.

  As a result, when the longitudinal member 450 is locked to the plurality of segments 20, 22, 24 and 26 in the fully deployed state of the helmet 1000, even if a downward force acts on the zenith portion of the helmet 1000 in that state, The posture of the longitudinal member 450 is maintained, and side bending of the longitudinal member 450 is prevented. On the other hand, the longitudinal member 450 does not substantially expand or contract in the length direction due to its material.

  As a result, even if the helmet 1000 receives the downward force, since the longitudinal member 450 is restrained in position and does not buckle, the plurality of segments 20, 22, 24, and 26 do not relatively approach. It's done (ie, it doesn't seem to buckle). Therefore, according to this embodiment, it becomes easy to achieve the longitudinal rigidity of the helmet 1000 as a whole so as to approach the longitudinal rigidity achieved when the shell 10 is configured by a single continuous member.

  As shown in FIG. 20A, the lock portion 1002 includes a female portion (an example of the first engaging portion, for example, a through hole, a concave portion) 1010 formed at the innermost end portion 460 of the longitudinal member 450. And a male part (an example of the second engaging part) 1014 formed on a movable member 1012 that is hinged to a hammock 102 (an example of the mating member) in a cantilever manner. The movable member 1012 can be elastically deformed around the hinge portion with respect to the hammock 102, and has elasticity to restore the original position. In FIG. 20B and FIG. 20B, the position indicated by “A” is the lock position (original position or non-operation position) of the male part 1014, while the position indicated by “B” is the male part. 1014 is a release position (operation position or non-lock position).

  In the locked position, the male part 1014 is fitted to the female part 1010 (concave fitting), and the longitudinal member 450 is relatively to the hammock 102 and thus the shell 10 in the longitudinal direction. Is prevented from being displaced. As a result, the elongate member 450 is prevented from traveling toward the center of the helmet 1000. As a result, the four segments 20, 22, 24 and 26 are prevented from being relatively displaced in the direction of approaching each other, and the helmet 1000 is maintained in the fully deployed state.

  Specifically, the longitudinal member 450 does not substantially expand and contract in the length direction thereof. On the other hand, the plurality of segments 20, 22, 24, and 26, which the longitudinal member 450 straddles, telescopically expands and contracts as shown in 19 as an example of the operation of the helmet 900. FIG. 19A shows a state in which the helmet 1000 is fully deployed, and the plurality of segments 20, 22, 24, and 26 are most extended. On the other hand, FIG. 19C shows a state in which the helmet 1000 is completely stored, and the plurality of segments 20, 22, 24, and 26 are most contracted.

  On the other hand, the outermost end 466 of the longitudinal member 450 is always fixed to the lowermost segment 26. Precisely, the outermost end 466 and the lowermost segment 26 of the longitudinal member 450 allow the relative rotation between them, and the thickness direction in the longitudinal direction and the width direction of the longitudinal member 450. Also, relative displacement is prevented.

  Therefore, in the fully deployed state of the helmet 1000, the innermost end portion 460, which is the end portion on the opposite side of the outermost end portion 466, of the longitudinal member 450 is the first stage segment 20 or the hammock 102. Located away from the center. On the other hand, in the fully retracted state of the helmet 1000, the innermost end portion 460 of the longitudinal member 450 is in a position near the center of the first stage segment 20 or the hammock 102. Thus, the relative position of the innermost end 460 of the longitudinal member 450 with respect to the first stage segment 20 or the center of the hammock 102 changes depending on whether the helmet 1000 is in a fully deployed state or a fully retracted state. .

  If the relative position of the innermost end 460 of the longitudinal member 450 with respect to the first stage segment 20 or the center of the hammock 102 is fixed in the fully deployed state of the helmet 1000, the helmet 1000 is unexpectedly contracted from the fully deployed state. Is prevented.

  Although the locking position has been described above, in the release position, the male part 1014 is detached from the female part 1010 in the length direction of the male part 1014, and the longitudinal member 450 is relative to the hammock 102 and thus the shell 10. In addition, the longitudinal member 450 is allowed to be displaced in the length direction. As a result, the longitudinal member 450 is allowed to travel toward the center of the helmet 1000. As a result, the four segments 20, 22, 24, and 26 are allowed to be relatively displaced in a direction approaching each other, and the helmet 1000 is allowed to shift from the fully deployed state to the fully retracted state.

  The male part 1014 is always in the locked position A, but when the user accesses the movable member 1012 from the inside of the helmet 1000 and pulls the movable member 1012 toward the user, the male part 1014 is elastically bent to lock the male part 1014. Transition from A to release position B. At this time, the male portion 1014 moves away from the longitudinal member 450 in a direction substantially perpendicular to the surface of the longitudinal member 450 (also the direction in which the male portion 1014 extends), and eventually the male portion 1014 moves away from the female portion 1010. Leave completely. At this time, the elongate member 450 is allowed to travel toward the center of the helmet 1000, and as a result, the four segments 20, 22, 24 and 26 are allowed to be relatively displaced in a direction approaching each other. Is done.

  In this state, when the user releases his / her hand from the movable member 1012, the movable member 1012 is restored to the lock position A which is the original position by its own elasticity. As a result, the male part 1014 is also restored from the release position B to the lock position A. At this time, the male portion 1014 approaches the longitudinal member 450 in a direction substantially perpendicular to the surface of the longitudinal member 450, and the male portion 1014 eventually fits into the female portion 1010. As described above, the movable member 1012 constitutes a part of the lock unit 1002, but also constitutes a part of the operation unit 1004.

  In addition, in the present embodiment, the lock portion 1002 is configured to straddle the longitudinal member 450 and the hammock 102 in the present embodiment. On the other hand, in the above-described fourth embodiment, as shown in FIG. 17, a portion 490 corresponding to the lock portion 1002 is formed across the longitudinal member 450 and the first stage segment 20. However, in any embodiment, the lock portion 1002 is disposed at the position of the first stage segment 20, and the innermost end portion 460 of the longitudinal member 450 extends from the position of the first stage segment 20.

  In addition, in the present embodiment, the male portion 1014 is attached to the hammock 102 in this embodiment, but may be attached to the inner surface of the first-stage segment 20 instead. In this aspect, the first stage segment 20 corresponds to an example of the counterpart member.

  In addition, in this embodiment, while the female portion 1010 is disposed on the longitudinal member 450 and the male portion 1014 is disposed on the mating member, the female portion 1010 is replaced by the mating member. The present invention may be implemented in such a manner that the male portion 1014 is disposed on the longitudinal member 450 while being disposed on the member.

  In addition, in this embodiment, the longitudinal member 450 is configured as a belt-like member, and is bent and deformed in the thickness direction of the longitudinal member 450 (an example of a direction intersecting the length direction). (Bending deformation in the width direction is limited due to its own cross-sectional shape), thereby switching between the lock position and the release position.

  However, instead of this, the longitudinal member 450 is configured as a string-like member (for example, a synthetic resin wire), the width direction of the longitudinal member 450 (the direction along the inner surface of the helmet 1000), Even if the present invention is implemented in a mode that can be switched between the lock position and the release position by being bent and deformed in another example of the intersecting direction (the bending deformation in the width direction is not limited by its own cross-sectional shape). Good. The same applies to any other embodiment.

  In addition, in the present embodiment, only one longitudinal member 450 is installed along the inner surface of the helmet 1000, but instead, a plurality of two, three, four, etc. The present invention may be implemented in such a manner that the elongated member 450 is installed along the inner surface of the helmet 1000. As the number of the longitudinal members 450 used in the same helmet 1000 increases, the longitudinal rigidity (for example, buckling strength) of the helmet 1000 in the maximum deployed state tends to be improved.

<Eighth embodiment>

  Next, a helmet 1100 according to an eighth exemplary embodiment of the present invention will be described with reference to FIG. However, since this helmet 1100 has many elements in common with the helmet 1000 according to the above-described seventh embodiment, only different elements will be described in detail, and the common elements will be referred to with the same name or symbol. Thus, a duplicate description is omitted.

  FIG. 21 (a) shows a connection mechanism in the hammock 102, the second stage segment 22, the third stage segment 24, and the fourth stage segment 26 of the helmet 1100 according to the present embodiment partially and fully deployed. 440 is a lower perspective view together with the longitudinal member 450, the lock portion 1102, and the operation portion 1104 of 440. FIG. 21B shows the innermost end portion 460 and the lock portion 1102 of the longitudinal member 450 in a state where the first-stage segment 20, the second-stage segment 22, and the hammock 102 of the helmet 1100 are partially and fully deployed. 4 is a cross-sectional view shown together with an operation unit 1104. FIG.

  The lock portion 1002 is fixedly formed on a protrusion (an example of the first engaging portion) 1110 formed on the innermost end 460 of the longitudinal member 450 and a hammock 102 (an example of the mating member). And a stopper (an example of the second engaging portion) 1112. As shown in FIGS. 21A and 21B, the protrusion 1110 is always in a locked position (original position or non-operating position) that engages with the stopper 1112.

  In the locked position, the protrusion 1110 is prevented from getting over the stopper 1112, thereby preventing the elongate member 450 from moving toward the helmet 1100 toward its center. As a result, the four segments 20, 22, 24, and 26 are prevented from being relatively displaced in the direction of approaching each other, and the helmet 1100 is maintained in the fully deployed state.

  On the other hand, when the user presses the operation unit 1104 that is a part of the longitudinal member 450 (for example, in the vicinity of the projection 1110 and has unevenness for preventing slippage) with a finger, the projection The part 1110 moves from the stopper 1112 in such a direction that the protrusion 1110 can get over the stopper 1112, and eventually the protrusion 1110 completely separates from the stopper 1112. In this release position, the longitudinal member 450 is allowed to travel toward the helmet 1100 toward its center. As a result, the four segments 20, 22, 24, and 26 are allowed to be relatively displaced in the directions approaching each other, and the helmet 1100 is allowed to transition from the fully deployed state to the fully retracted state.

  Although the male part 1110 is always in the locked position, when the user accesses the operation part 1104 from the inside of the helmet 1100 and presses the operation part 1104 with a finger, the longitudinal member 450 is elastically pushed and bent. Transition from the locked position to the released position. When the user removes his / her finger from the operation unit 1104, the longitudinal member 450 is restored to its original position by its own elasticity, and accordingly, the protrusion 1110 is restored to the locked position. As described above, the longitudinal member 450 constitutes a part of the lock part 1102, but also constitutes a part of the operation part 1104.

  In addition, in the present embodiment, the stopper 1112 is attached to the hammock 102 in this embodiment, but it may be attached to the inner surface of the first stage segment 20 instead. In this aspect, the first stage segment 20 corresponds to an example of the counterpart member.

  In addition, in the present embodiment, the protrusion 1110 is disposed on the longitudinal member 450 while the stopper 1112 is disposed on the counterpart member. Instead, the protrusion 1110 is provided on the counterpart member. On the other hand, the present invention may be implemented in such a manner that the stopper 1112 is disposed on the longitudinal member 450.

<Ninth embodiment>

  Next, a helmet 1200 according to a ninth exemplary embodiment of the present invention will be described with reference to FIG. However, since this helmet 1200 has many elements in common with the helmet 1000 according to the seventh embodiment described above, only different elements will be described in detail, and the common elements will be referred to with the same names or symbols. Thus, a duplicate description is omitted.

  FIG. 22 (a) shows that the first stage segment 20, the second stage segment 22, the third stage segment 24, and the fourth stage segment 26 of the helmet 1200 according to the present embodiment are partially connected in the fully deployed state. FIG. 11 is an upper perspective view shown together with an operation unit 1202 of a mechanism 440. 22B shows the innermost end portion 460, the lock portion 1204, and the operation portion 1202 of the longitudinal member 450 of the coupling mechanism 440, with the first-stage segment 20 removed from the helmet 1200. It is a perspective view.

  Further, FIG. 22C is a cross-sectional view showing the operation unit 1202. 22D shows the first-stage segment 20 and the hammock 102 of the helmet 1200 partially together with the innermost end portion 460, the lock portion 1204, and the operation portion 1202 of the longitudinal member 450 in the fully deployed state. It is sectional drawing.

  As shown in FIG. 22B, the lock portion 1204 is a female portion (an example of the first engaging portion, such as a through hole, a concave portion, etc.) 1210 formed at the innermost end portion 460 of the longitudinal member 450. And a male part (an example of the second engaging part) 1212 fixedly formed on the hammock 102 (an example of the mating member). The longitudinal member 450 is always in a locked position (original position or non-operating position) where the female portion 1210 engages with the male portion 1212 as indicated by “X” in FIG.

  In the locked position X, the longitudinal member 450 is prevented from being displaced relative to the hammock 102 and thus the shell 10 in the longitudinal direction of the longitudinal member 450, so that the longitudinal member 450 is attached to the helmet 1200. On the other hand, it is prevented from proceeding towards its center. As a result, in the locked position, the four segments 20, 22, 24, and 26 are prevented from being relatively displaced in a direction approaching each other, and the helmet 1200 is maintained in the fully deployed state.

  As shown in FIG. 22B, the operation unit 1202 is rotatably mounted on the shell 10 with a pair of rotating shafts 1220 extending coaxially. Further, as shown in FIG. 22A, the operation unit 1202 is fitted so as to fit into the notch 1222 of the first stage segment 20, and the surface of the operation part 1202 extends from the first stage segment 20. Exposed. The notch 1222 has a recess 1224 so that the user's finger can access the tip of the operation unit 1202.

  As shown in FIG. 22C, the operation unit 1202 is hollow, and specifically has an internal passage 1230 that allows the elongate member 450 to pass therethrough. The internal passage 1230 is defined by an upper plate portion 1232, a lower plate portion 1234, and a pair of side plate portions 1236 and 1236.

  As shown in FIG. 22 (d), the operation unit 1202 is always at a position where the lock position indicated by “A” in the drawing, that is, the lock position X of the longitudinal member 450 is realized. When the operation portion 1202 is at the position A, the downward surface of the upper plate portion 1232 locally contacts the upward surface of the longitudinal member 450, thereby facilitating insertion of the female portion 1210 into the male portion 1212. It prevents that the female part 121 will detach | leave from the male part 1212 unexpectedly. In other words, the upper plate portion 1232 functions as a guide that guides the longitudinal member 450 so as to change the trajectory of the longitudinal member 450 by pushing down the longitudinal member 450 from above.

  When a user accesses the operation unit 1202 from the outside of the helmet 1200 and rotates the operation unit 1202 outward around the rotation shaft 1220, the operation unit 1202 is positioned at the position indicated by “B” in the drawing. 1234 contacts the downward surface of the longitudinal member 450 locally on the upward surface.

  When the operation part 1202 is further rotated in the same direction, the lower plate part 1234 pushes up the longitudinal member 450 from below. That is, the lower plate portion 1234 functions as a guide that guides the longitudinal member 450 to be pushed up from below to change the trajectory of the longitudinal member 450. As a result, the longitudinal member 450 is elastically deformed in a direction away from the male portion 1210. In the position indicated by “C” in the figure, the operation unit 1202 realizes that the female part 1210 completely separates from the male part 1212. Therefore, the longitudinal member 450 moves from the lock position X to the release position Y.

  At the release position Y, the longitudinal member 450 is allowed to be displaced in the longitudinal direction of the longitudinal member 450 relative to the hammock 102 and thus the shell 10. This allows the elongate member 450 to travel toward the center of the helmet 1200. As a result, the four segments 20, 22, 24, and 26 are allowed to be relatively displaced in the directions approaching each other, and the helmet 1200 is allowed to transition from the fully deployed state to the fully retracted state.

  When the user removes his / her hand from the operation unit 1202, the longitudinal member 450 is restored to the original lock position X by the elasticity of a return spring (not shown), and the female part 1210 is re-engaged with the male part 1212 accordingly. It is done. Thereby, the female part 1210 and the male part 1212 are restored to the locked state.

  In addition, in this embodiment, although the male part 1212 is attached to the hammock 102 in this embodiment, it may be attached to the inner surface of the first stage segment 20 instead. In this aspect, the first stage segment 20 corresponds to an example of the counterpart member.

  In addition, in this embodiment, while the female portion 1210 is disposed on the longitudinal member 450 and the male portion 1212 is disposed on the counterpart member, the female portion 1210 is replaced by the counterpart member. The present invention may be implemented in such a manner that the male part 1212 is disposed on the longitudinal member 450 while being disposed on the member.

  As is clear from the above description, according to the plurality of embodiments described above in which the plurality of segments are connected to each other by the elongated member, the shell 14 is divided into a plurality of segments in a plurality of horizontal cross sections. Nevertheless, in the fully deployed state of the helmet, the segments are joined together by the longitudinal member in a state where the longitudinal member does not easily buckle against vertical external forces, The longitudinal rigidity of the helmet is improved.

  In these embodiments, in order to achieve the effect of improving the longitudinal rigidity, the upper end of the longitudinal member is locked to the uppermost segment or another member attached thereto according to the operation of the wearer. While being linked so as to switch to the released state, the lower end portion of the longitudinal member is linked to the lowermost segment or another member attached thereto so that it is always in a locked state.

  However, the effect of improving the longitudinal rigidity is another aspect, that is, the upper end of the longitudinal member is always linked to the uppermost segment or another member attached thereto so that it is always locked. The lower end portion of the longitudinal member can also be achieved in such a manner that the lowermost segment or another member attached thereto is linked to be switched between a locked state and a released state in accordance with the wearer's operation.

  However, in this alternative embodiment, in the maximum retracted state of the helmet, the lower end portion of the longitudinal member protrudes downward from the lowermost segment of the helmet and is obstructive. According to the form, in the maximum retracted state of the helmet, the upper end portion of the longitudinal member extends toward the center of the uppermost segment of the helmet from the position where the helmet is fully deployed, but the extension The protruding part is still housed inside the uppermost segment and will not jump out of the helmet.

  Thus, according to these embodiments, the helmet can be reduced in size by telescopically shrinking in a state where all the components of the helmet are compactly accommodated in the helmet.

  As is clear from the above description, in the plurality of embodiments described above, in the case where the plurality of segments are connected to each other by the longitudinal member, the outermost end portion 466 and the lowermost segment 26 of the longitudinal member 450. Are always allowed to rotate relative to each other, but the relative rotation between the two is always blocked, for example, the outermost end 466 of the longitudinal member 450 and the lowermost stage. It is also possible to implement the present invention in such a manner that the segments 26 are fixed to each other inseparably.

<Tenth embodiment>

  Next, a helmet 1300 according to a tenth exemplary embodiment of the present invention will be described with reference to FIG. However, since this helmet 1300 has many elements in common with the helmet 1000 according to the above-described seventh embodiment, only different elements will be described in detail, and the common elements will be referred to with the same name or symbol. Thus, a duplicate description is omitted.

  A helmet 1000 according to the seventh embodiment shown in FIG. 20 is a coupling mechanism that switches between a locked state and a released state between the innermost end 460 of the elongated member 450 and the hammock 102 attached to the first-stage segment 20. 440.

  On the other hand, as shown in FIG. 23, the helmet 1300 according to the present embodiment replaces the coupling mechanism 440 with an innermost end portion 460 of a longitudinal member 450 (referred to as a “guide belt” in the present embodiment). Is connected to the first stage segment 20 so that the buckle 1312 can be fixed or swingable, and the tongue 1310 can be detachably engaged with the buckle 1312 according to the wearer's operation. A mechanism 1314 is included.

  As shown in FIG. 23, the helmet 1300 has three guide belts 450. The hammock 102 has a notch 1316 that allows each guide belt 450 to pass through. A buckle 1312 is prepared for each guide belt 450.

  The buckle 1312 is designed to lock the tongue 1310 when the tongue 1310 is inserted and release the tongue 1310 in response to the wearer's operation. The tongue 1310 is inserted from the entrance of the buckle 1312 and protrudes from the exit. The buckle 1312 is installed with respect to the helmet 1300 so that the entrance is located near the outer periphery and the exit is located near the center.

  As shown in FIG. 24, the buckle 1312 is a hollow housing 1320 that allows the guide belt 450 to pass therethrough, and a lock 1322 that is attached to the housing 1320 via an elastic hinge, and is detachably engaged with the tongue 1310. The lock 1322 is always positioned at the lock position, and has a release mechanism that switches the lock 1322 from the lock position to the release position by operating force when the buckle 1312 is operated by the wearer.

  Further, the buckle 1312 is a pair of push buttons 1328 and 1328 as an operation unit operated by the wearer to release the buckle 1312, and is exposed at least partially on both sides of the housing 1320. The two fingers (for example, thumb and index finger) are pushed and operated from both sides.

  As shown in FIG. 24, the buckle 1312 is attached to the inner surface of the first stage segment 20 so as to be pivotable (slidable) around the horizontal axis. Therefore, the buckle 1312 has a pair of pivot shafts 1330 and 1330, and the first stage segment 20 has a mounting portion 1332 that supports the pivot shafts 1330 and 1330 from one side surface direction. The hammock 102 has a mounting portion 1334 that supports the pivot shafts 1330 and 1330 from opposite side directions.

  Each pivot shaft 1330 is sandwiched from both sides by opposing mounting portions 1332 and 1334 and is rotatably supported. As a result, the buckle 1312 can swing around the horizontal axis with respect to the first stage segment 20, and the first stage segment 20 has a stopper 1340 that defines the lowermost position of the buckle 1312.

  FIG. 25 shows an enlarged view of the coupling mechanism 1314 in the deployed state of the helmet 1300. A liner 1350 as an impact absorbing material is attached to the inner surface of the first stage segment 20, and in the developed state, the guide belt 450 is positioned at the position of the stopper 134 so as to extend along the concave inner surface of the liner 1350. And the shape is set.

  FIG. 26 shows the coupling mechanism 1314 in an enlarged manner in the storage state of the helmet 1300. In the storage state, the plurality of segments 20, 22, 24, and 26 are relatively close to each other, and finally, the segments 20, 22, 24, and 26 are both in the upper surface position and the lower surface position. , 22, 24 and 26 coincide with each other. Therefore, in the stored state, all of the three guide belts 450 need to extend linearly.

  Each guide belt 450 can be bent (flexed) elastically, and linearly extends in the natural state. In the deployed state shown in FIG. 25, each guide belt 450 is bent by an external force. .

  On the other hand, in the storage state shown in FIG. 26, each guide belt 450 tries to be restored to its natural state by its own elasticity, and as a result, as shown in FIG. The upper portion of each guide belt 450 extends linearly, and the other portions of each guide belt 450 also extend linearly, although not shown, and each guide belt 450 is linear as a whole. Extended.

  In the unfolded state shown in FIG. 25, each guide belt 450 is bent by an external force. Therefore, in this state, each guide belt 450 is in a state of being restored to a natural state, that is, in FIG. 25, the tongue 1310 is directed toward the center position of the top of the helmet 1300 with respect to the buckle 1312. It is in a state of trying to extend.

  As a result, when the wearer folds the helmet 1300 and pushes and releases the buckle 1312 with a finger so as to realize the storage state, the guide belt 450 spontaneously protrudes further inward from the buckle 1312. Therefore, even if the wearer removes his / her finger from the buckle 1312 and tries to restore the lock 1322 of the buckle 1312 to the locked position in that state, at that time, the engaged part of the tongue 1310 is located at a position facing the lock 1322. Since the part 1360 is not located, the tongue 1310 is not locked by the buckle 1312 again.

  By the way, in general, the buckle is designed to prevent bidirectional movement in the length direction of the tongue inserted in the buckle in the locked state. On the other hand, in this embodiment, as shown in FIGS. 25 and 26, as described above, the guide belt 450 is in a direction in which the helmet 1300 is contracted by its own restoring force when the helmet 1300 is deployed. Is applied to the helmet 1300, which means that the guide belt 450 has a tendency to be inserted deeper into the buckle 1312, that is, a tendency to protrude further inward from the buckle 1312.

  Therefore, in the unfolded state of the helmet 1300, when the tongue 1310 is locked to the buckle 1312, as shown in FIG. This causes a compressive load on the tongue 1310 along its length.

  That is, in the present embodiment, in the locked state of the buckle 1312, no force is generated that the tongue 1310 tries to detach from the buckle 1312 in the direction opposite to the insertion direction. Therefore, the buckle 1310 is different from the above-described buckle in the direction of inducing the movement of the tongue 1310 in one direction, that is, the helmet 1300 is folded on its own and shifts from the expanded state to the retracted state. It is only designed to prevent movement. That is, the buckle 1310 is not a bidirectional lock type but a one-way lock type.

  As shown in FIGS. 25 and 26, in the present embodiment, when the helmet 1300 is folded, the amount of inward protrusion of the guide belt 450 from the buckle 1310 increases. A length portion protruding inward from 1310 is accommodated in a space between the liner 1350 and the hammock 102 as shown in FIG. Therefore, the part does not contact a wearer's head.

  As described above, some of the embodiments of the present invention have been described in detail with reference to the drawings. However, these are exemplifications, and are based on the knowledge of those skilled in the art including the aspects described in the section of [Summary of the Invention]. The present invention can be implemented in other forms with various modifications and improvements.

Claims (4)

A telescopic telescopic helmet worn on the wearer's head,
A hemispherical shell formed by connecting a plurality of segments having at least an uppermost segment and a lowermost segment so as to be relatively displaceable in the height direction of the helmet;
A continuum extending between the position of the uppermost segment and the position of the lowermost segment;
Provided in the uppermost mating member which is the uppermost segment or another member attached thereto, and when the portion corresponding to the uppermost mating member of the continuum is inserted as a tongue, the tongue is locked, A buckle that releases the tongue according to the operation of the wearer,
Telescopic including an engaging portion provided on the lowermost mating member which is the lowermost segment or another member attached to the lowermost segment, and engaged with a portion of the continuous body corresponding to the lowermost mating member in an inseparable manner Telescopic helmet.   The telescopic telescopic helmet according to claim 1, wherein the buckle is slidably attached to the uppermost mating member.   The telescopic telescopic helmet according to claim 1 or 2, wherein the engaging portion is attached to the lowermost mating member so as to be swingable. The continuum extends linearly in a natural state, and when the external force acts on the continuum because the helmet has shifted from the deployed state to the retracted state, the elastic body flexes elastically and the external force no longer acts. The telescopic telescopic helmet according to any one of claims 1 to 3, which is restored to the natural state.

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