JP2015028233A - Telescopic expansion helmet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a helmet that is attached to a wearer's head and that can be easily miniaturized and housed by the wearer in disuse.SOLUTION: A telescopic expansion helmet 10 is telescopically expanded/contracted in the height direction of the helmet by a force imparted from a wearer. Thus, the height dimension of the helmet is changed into the expansion state of being maximized and the contraction state of being minimized.

Description

  The present invention relates to a helmet to be worn on a wearer's head, and more particularly to a helmet that can be easily downsized and stored by a wearer when not in use.

  Patent document 1 is disclosing the helmet with which a wearer's head is mounted | worn. This helmet can be reduced in size by being folded by the wearer when not in use. This helmet can be stored in a narrow space and is convenient.

JP 2007-162179 A

  This type of helmet has various demands at least from the viewpoint of the wearer. These requests include, for example, a desire to reduce the size of the helmet in the storage state to facilitate storage without hindering basic functions (for example, strength, rigidity, impact properties, etc.) Wants to simplify the operations required of the wearer in order to restore the helmet when the need to use the helmet suddenly becomes necessary There is a desire to ensure that the structural and performance of the helmet is restored when the use of the helmet is urgently needed.

  In view of such circumstances, the present invention is to provide a helmet to be worn on the wearer's head, which is easy for the wearer to downsize and store when not in use. It was made.

  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 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 stretchable helmet that changes between an extended state and a 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.

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 in an extended state. FIG. 2 is a perspective view showing the helmet shown in FIG. 1 in a retracted state. FIG. 3 is a front view showing the appearance of the helmet shown in FIG. FIG. 4 is a side view showing the appearance of the helmet shown in FIG. 1 in a stretched state. FIG. 5 is a front cross-sectional view showing the helmet shown in FIG. 1 in a use state in an extended state. FIG. 6 is a front cross-sectional view showing the helmet shown in FIG. FIG. 7 is a rear view showing the internal structure of the helmet shown in FIG. FIG. 8 is a perspective view showing the internal structure of the helmet shown in FIG. 1 in a stretched 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.

  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, thereby, the stretched state in which the height dimension of the helmet 10 is maximum, It changes to the contracted state where the height dimension is the minimum. The height of the helmet 10 is, for example, about 100 to about 120 mm in the stretched state (when worn), and is about 35 to about 45 mm in the contracted state (when stored), for example. is there.

  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 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 20, 22, 24, and 26 that complement each other in shape and are capable of relative displacement in the height direction. . 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.

  The four movable members 20, 22, 24 and 26 have a central movable member 20, two intermediate movable members 22 and 24, and an outer movable member 26 when the helmet 10 is viewed from directly above. 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. No need to

  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, whereby the second-stage shell segment 22 and the third-stage shell segment 24 are connected to each other. .

  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 engagement convex portion 250 engages with an upper engagement concave portion 252 formed on the back surface of the upper portion of the fourth-stage shell segment 26, and thereby the third-stage shell segment 24 and the fourth-stage shell segment 24. The eye shell segments 26 are connected to each other.

  This connected state 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 this natural state, the upper engagement recess 244 of the rear plate portion 232 is placed on the lower side of the upper connection portion 212. The dimensions of the associated members so that the engaging projection 246 engages and the lower engaging projection 250 of the front plate 230 engages the upper engaging recess 252 of the fourth stage shell segment 26. The relationship is preset.

  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, thereby re-connecting between the third stage shell segment 24 and the fourth stage shell segment 26.

  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 engaging convex portion 352 of the first-stage shell segment 20 is engaged with the upper engaging concave portion 350, whereby the first-stage shell segment 20 and the second-stage shell segment 22 are connected. Connected to each other. The lower engaging protrusion 352 protrudes in the same direction as the direction indicated by the arrow C in FIG.

  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, whereby the second-stage shell segment 22 and the third-stage shell segment 24 are connected to each other. Is done. 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, 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. Dimensional relationships are 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 concave portion 350 is engaged with the lower engagement convex portion 352 of the first-stage shell segment 20. And the engagement of the lower engagement projection 246 with the upper engagement recess 244 of the lower connection portion 214 attached to the third-stage shell segment 24 substantially simultaneously. Thereby connecting between the first-stage shell segment 20 and the second-stage shell segment 22 and between the second-stage shell segment 22 and the third-stage shell segment 24. Concatenation takes place substantially simultaneously.

  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. .

  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.

  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 (6)

  A helmet that is worn on the wearer's head and that telescopically expands and contracts in the height direction of the helmet due to the force applied by the wearer, so that the height of the helmet is maximized A telescopic telescopic helmet that changes into a state and a contracted state in which the height dimension is minimum. 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 claim 1, wherein the movable members are connected to each other so as not to be separated from each other. Furthermore, including a connection mechanism for selectively connecting and releasing the plurality of movable members by the 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. The telescopic telescopic helmet according to claim 2, which is performed automatically. The first connecting part further includes a first fixed part 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 claim 3, wherein the connection between the lower movable member and the lower engagement portion is substantially synchronously performed. The coupling 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, and the second target movable member. The connection and release between the member movable member adjacent to the member on the upper side or the lower side thereof is performed along the second horizontal axis of the second movable part common to the second target movable member and the partner movable member. Including a second connecting portion selectively performed by a bi-directional bending motion with an extending elastic hinge 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 claim 3 or 4, wherein the connection between the counterpart movable member and the engaging portion is performed by a reverse direction bending motion with the fulcrum as a fulcrum. The coupling 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 claim 3, further comprising: a movement control mechanism that controls movement of the operation member so as to move together with the target movable member.

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