JP2013102839A - Buckle for helmet and helmet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a buckle for helmet that can suppress both force required for releasing the connection of a band used for mounting a helmet and the increase of a structure and to provide a helmet for which the buckle is used as a band.SOLUTION: The buckle 50 for helmet includes: a band locking member 55 attached to one end of the band; and a release member 70 tiltably attached to the band locking member 55. The band locking member 55 includes: a claw part 62 engaging with an adjusting part 35; and an elastic plate 61 for applying energizing force, for energizing the claw part 62 to the adjusting part 35, to the claw part 62. The release member 70 includes: a base end 52 being a tilting center connected to the band locking member 55; a distal end 51 for approaching and separating to the band by the tilt of the release member 70; and a hook 74 connected to an energizing part between the base end 52 and the distal end 51.

Description

  The present invention relates to a helmet buckle for fixing a band used for wearing a helmet, and a helmet in which the buckle is used for a band.

  Conventionally, helmets that are worn on the head and protect the head are known. In such a helmet, a hemispherical cap body (shell) that constitutes the outer shell of the helmet, a hammock that is provided inside the cap body and maintains a predetermined distance between the cap body, and a cap body is provided. And a headband that surrounds the head of the wearer and fixes the helmet. Further, the headband is provided with a mechanism capable of adjusting the circumference of the headband according to the size of the wearer's head. As a headband of a helmet having such an adjustment mechanism, for example, there is a headband described in Patent Document 1.

  The headband described in Patent Literature 1 is provided with a toothed engagement tooth row at one end, and a buckle that connects the band by engagement with the engagement tooth row at the other end. Are connected. This buckle is provided with an engaging claw having a saw-tooth receiving projection, and the engaging claw is provided with a thick wall portion on which a finger is applied. And the engagement state of the to-be-engaged tooth row | line | column of a band and an engagement nail | claw is cancelled | released by raising the thick part of an engagement nail | claw from a band surface. However, the force required to operate the thickened portion of the locking claw varies depending on the design, for example, if the engagement force is increased to stabilize the engagement state, a stronger force is required accordingly. It was. Therefore, for example, there is a headband described in Patent Document 2 as a headband of a helmet that can appropriately adjust the force required for operation with respect to the engagement force that is appropriately changed according to the design or the like.

  Similarly to the above, the headband described in Patent Document 2 includes a serrated engagement portion at one end of the headband, and a sawtooth receiving protrusion at the other end of the band. Each has a joint. Further, the headband is provided with a swinging portion that pushes the engaging portion toward the band surface. The swinging portion has an action end that lifts across the rotation shaft when the free end is pushed down so that the action end that lifts contacts the engagement portion and pushes the engagement portion up from the band surface. It has become. Even if the engaging force is changed according to the design or the like by transmitting the force for pushing up the engaging portion from the band surface to the locking portion from the swinging portion by utilizing the lever principle. When releasing the engagement, the pressing force required for operating the free end of the swinging portion can be adjusted to an appropriate force.

JP 2003-49315 A Japanese Patent No. 4103043

  According to the above-described headband of Patent Document 2, it is possible to appropriately adjust the force required to disengage the engaging portion. However, if the force required for the operation is to be made constant, The more force required to push up, the longer the free end of the oscillating portion is away from the rotating shaft and the longer the free end can be pushed. That is, when the swinging part tries to cope with a strong force, the free end is separated from the band, so that the part away from the band is not caught by anything around the free end. It is inevitable that the size of the protective portion provided so as to cover the cover increases.

  The present invention has been made in view of such a situation, and its purpose is to achieve both the suppression of the force required to release the connection of the band used for mounting the helmet and the suppression of the size of the structure. It is to provide a possible buckle for a helmet and a helmet in which the buckle is used for a band.

In order to solve the above-mentioned problems, the present invention is provided at one end of a band used for wearing a helmet, and connects the band by engagement with an engaged portion formed at the other end of the band. A helmet buckle comprising: a band locking member attached to the one end of the band; and a release member attached to the band locking member so as to be tiltable.
An engaging portion for engaging the engaged portion with the band engaging member; and an urging portion for applying an urging force for urging the engaging portion to the engaged portion to the engaged portion. The release member is a base end portion that is a tilt center connected to the band locking member, a tip end portion that approaches and separates from the band due to the tilt of the release member, and the base end portion A connecting portion connected to the urging portion between the tip portion and the tip portion receiving a tilting force in a direction of detachment from the band. The gist is that a releasing force against the urging force is applied to the engaging portion.

  In order to solve the above-mentioned problem, the present invention is a helmet provided with a headband, wherein the headband includes an attachment part attached to the helmet and two branch parts provided in the attachment part. Two branched bands that are branched and connected via a buckle in the rear direction on the occipital side, and one of the two branched bands has an engaged portion on the band surface. The other branch band of the two branch bands includes a band support portion that inserts and supports the one branch band, and the band support portion described above as a buckle that connects the two branch bands. The main point is to have a buckle.

  According to such a structure, when the front-end | tip part of a cancellation | release member rotates in the direction away from a band, a cancellation | release force is applied to the engaging part of a band locking member via the connection part of a cancellation | release member, and a band The engagement between the engaging portion of the locking member and the engaged portion of the band is released. At this time, since the band is released using the principle of lever, the strength of the force required to release the engagement between the engaged portion of the band and the engaging portion of the band locking member is reduced. Regardless, the force required for operating the tip of the release member can be adjusted appropriately.

  In addition, a part of the urging force applied to the engagement portion of the band locking member continues to act on the distal end portion of the release member via the connection portion of the release member. Therefore, when the tip portion does not receive the tilting force in the direction away from the band, the tip portion is arranged at a position close to the band according to the biasing force described above. As a result, the band is connected in a state in which the release member including the tip portion is close to the band in the rotation range thereof, and thus the buckle having such a release member can be reduced in size.

  Further, according to the present invention, in the buckle for a helmet described above, the engaged portion has a sawtooth engaged tooth row, and the engaging portion can engage with the engaged tooth row. And the urging portion has a cantilever beam to which the claw portion is connected and applies the urging force to the claw portion, and the linking portion is connected to a tip end of the cantilever beam. This is the gist.

  According to such a configuration, the cantilever beam in the engaging portion applies a biasing force to the claw portion, and the connecting portion of the release member is connected to the tip of the cantilever beam. Therefore, in order to make the clearance between the engaged tooth row and the claw part as much as possible, it is possible to reduce the force applied to the cantilever compared to the aspect in which the connecting part is connected in addition to the tip of the cantilever. is there. Therefore, when releasing the engagement between the engaged portion of the band and the engaging portion of the band locking member, it is possible to reduce the rotational force required for the distal end portion of the release member. It is also possible to improve the operability.

  Furthermore, the present invention provides the helmet buckle described above, wherein the connecting portion has a hook that engages with the tip of the cantilever, and the return of the hook is the band at the tip of the cantilever. The gist is to contact the side.

  According to such a configuration, since the connecting portion comes into contact with the distal end portion of the cantilever from the band side of the distal end portion, the space between the cantilever beam and the band is separated from the band locking portion and the release member. It becomes possible to utilize as a connection part. Therefore, it is possible to reduce the thickness of the buckle.

  Furthermore, the present invention provides the helmet buckle described above, wherein the band locking member has a shaft portion extending along the band surface, and a base end portion of the release member rotatably supports the shaft portion. The gist of the present invention is to have a bearing portion, and the bearing portion is made of a resin that can be fitted to and removed from the shaft portion.

  According to such a configuration, the band locking member and the release member are integrated by fitting the shaft portion and the resin bearing portion that can be fitted to and removed from the shaft portion. Assembling of the buckle composed of the release member is facilitated. In addition, since the band locking member and the release member are configured to be rotatable via the shaft portion, the rotation operation of the distal end portion of the release member is facilitated, and the distal end portion and the proximal end portion are It is possible to reduce the fatigue of every release operation. Therefore, compared to the case where the base end portion and the band locking member are connected by a flexible member, durability against repetition of the release operation can be improved.

  Further, according to the present invention, in the above-described helmet buckle, the release member has a plate shape that covers the side of the band locking member opposite to the band, and the band locking portion is the base of the release member. An abutting portion that abuts on the band side at the end portion, and the abutting portion biases the base end portion of the release member in a direction to separate from the band, and the distal end of the release member The gist is to urge the portion in a direction to approach the band.

  According to such a configuration, when the release operation is not performed, the distal end portion of the release member is held at a position close to the band. For this reason, the buckle can be more suitably downsized.

  Further, the gist of the present invention is that the band locking member and the release member are formed of a resin material harder than the band in the helmet buckle described above.

  According to such a configuration, by using a member harder than the band as the band locking member, the biasing force applied by the biasing portion of the band locking member to the engaging portion, or the contact portion of the band locking member The urging force applied to the release member can be increased.

Furthermore, the gist of the present invention is that, in the helmet described above, the band is rotatably connected to the branch portion.
According to such a configuration, since the tightening position of the band can be adjusted, the uncomfortable feeling felt by the wearer can be suppressed. Also, as a band, suitability to the shape of the head is improved, and appropriate wearing is expected.

  Further, according to the present invention, in the helmet described above, the branch portion has a plurality of concentric sliding grooves, and the branch band is concentrically formed on a surface facing the branch portion. The gist of the invention is to have a plurality of sliding protrusions that fit into each of the dynamic grooves.

  According to such a configuration, since the sliding groove of the branching portion and the sliding protrusion of the branching band are fitted over the entire circumference, the branching band can be rotated with respect to the mounting portion. Since these fitting forces are also increased, the possibility that such fitting is released is reduced. In other words, since the band is made of a flexible material, the branch part and the branch band may be distorted by an external force, but since the fitting length between the branch part and the branch band is long, The maintaining power of the fitting state against the strain is increased. Further, since the sliding groove and the sliding protrusion are formed of the same material as the branching portion and the branching band, it can be distorted to some extent while maintaining the fitting. Thereby, the flexibility of the headband of the helmet is maintained.

Furthermore, the gist of the present invention is that, in the helmet described above, the branch band is formed of a resin material containing polyethylene.
According to such a structure, moderate intensity | strength and a softness | flexibility can be provided now to the rotation part formed in a band.

  According to such a helmet buckle and a helmet in which the buckle is used for a band, it is possible to suppress the force required to release the connection of the band used for mounting the helmet and to suppress the enlargement of the structure. It becomes possible.

The rear view which shows the structure of the back side of the helmet provided with the buckle about one embodiment of the helmet provided with the buckle for the helmet according to the present invention. The top view which shows the expansion | deployment structure of the headband equipped with the helmet of the embodiment. The front view which is a part of headband of the embodiment, and shows the front structure of the band to which the buckle and the buckle are attached. The perspective view which is a part of headband of the embodiment, and shows the perspective structure of the engagement state of the two belts latched by the buckle. The perspective view which shows the perspective structure of the buckle of the embodiment. Sectional drawing which shows the cross-section in the 6-6 line | wire of FIG. 4 about the buckle of the embodiment. Sectional drawing which shows the cross-section in the state by which engagement of a belt is open | released about the buckle of the embodiment. The top view which shows the decomposition | disassembly structure of the branch part by which the belt is rotationally supported about the helmet of the embodiment. The perspective view which shows the perspective structure of the latching | locking part which comprises a buckle about other embodiment of the buckle for helmets which concerns on this invention.

  Hereinafter, an embodiment in which a buckle for a helmet of the present invention and a helmet including the buckle are embodied will be described with reference to FIG. In addition, this helmet is a helmet for head protection worn mainly on a human head.

  As shown in FIG. 1, the outer shell of the helmet is constituted by a hollow hemispherical cap body 10. The cap body 10 is made of, for example, an ABS resin such as acrylonitrile butadiene styrene copolymer, and a folded portion that is folded back to the outer peripheral side in the opening portion 12 that is a circumferential opening formed by a hollow hemispherical shape. 14 is provided. In addition, with respect to the rear side shown in figure, the front side which is not shown in figure may be provided with the collar part which protrudes in an outer peripheral direction so that a user's face may be protected from rain, a fallen object, etc. The helmet is attached to the wearer's head with the back of the head positioned on the back and the face facing the front. In the helmet body 10, the opening side of the opening 12 is the lower side, and the hemispherical top side is the upper side.

  The cap body 10 is provided with a circumferential headband 20 around the opening 12 so as to fix the position of the cap body 10 with respect to the wearer's head. The headband 20 has an adjustment band 30 as a branch band in which a plurality of recesses 32 as engaged teeth are formed on a band surface 31 that is an outer peripheral side surface of the headband 20 as one end. As an end portion of the headband 20, a holding band 40 is provided as a branching band that holds the adjustment band 30 on the band surface 41 that is the outer peripheral side surface of the headband 20. The holding band 40 is provided with a buckle 50 that can connect the position of the adjustment band 30 superimposed on the holding band 40 to the holding band 40. The buckle 50 can also release the connection between the holding band 40 and the adjustment band 30 by an opening operation. As a result, the headband 20 is adjusted in the degree of tightening with respect to the head based on the circumference adjusted in accordance with the change in the length of the adjustment band 30 superimposed on the holding band 40. The properly adjusted tightening state is maintained when the buckle 50 continues to connect the adjustment band 30 and the holding band 40.

  Next, the headband 20 will be described in detail with reference to FIG. FIG. 2 is a plan view in which the headband 20 removed from the cap body 10 is developed so that the outer peripheral surface side is shown. The headband 20 is attached to the cap body 10 at both ends. It arrange | positions at the back side (back of the head) of a helmet, and a center part is arrange | positioned at the front side (face side) of a helmet.

  The headband 20 is provided with a main band 21 extending from the front side to the rear side of the helmet and extending the opening 12 along the opening 12 by a half or more, and the adjustment band 30 and the holding band 40 described above are the main band. 21 are provided as bands extending from the rear side toward the lower rear side.

The main band 21, the adjustment band 30, and the holding band 40 are each formed from a resin material made of polyethylene such as low density polyethylene (LDPE), linear low density polyethylene (L-LDPE), or high density polyethylene (HDPE). ing. The LDPE of the present embodiment has, for example, a density of 0.910 to 0.925 [g / cm ³ ], a crystallinity of 45 to 55 [%], and a melting point of 98 to 115 [° C.]. And a density of 0.918 to 0.940 [g / cm ³ ], a crystallinity of 50 to 60 [%], and a melting point of 122 to 124 [° C.]. HDPE has, for example, a density of 0.941 to 0.970 [g / cm ³ ], a crystallinity of 65 to 85 [%], and a melting point of 130 to 137 [° C.]. In general, the headband 20 tends to improve the wearing comfort when it is a soft material, whereas the strength of the headband 20 tends to be improved when it is a slightly hard material. In this case, polyethylene is selected as a material that can bring these conditions concerning the comfort and strength into a suitable state.

  The main band 21 includes four band locking portions 22 at positions facing the inner peripheral surface of the cap body 10, and these band locking portions 22 correspond to the respective band locking portions 22. It is adapted to be fitted to a headband mounting portion (not shown) formed on the inner peripheral surface of the head. That is, the headband 20 is attached to the cap body 10 by fitting the corresponding band locking portions 22 to the respective headband attachment portions inside the cap body 10. Further, the main band 21 is provided with branch portions 23A and 23B at the branch positions set between two continuous band locking portions 22 on the end side closer to the rear side, The adjustment band 30 is branched from the branch portion 23A, and the holding band 40 is branched from the other branch portion 23B.

  The adjustment band 30 is connected to the one branch part 23A so as to extend rearward, a connection part 33 connected to the one branch part 23A, an intermediate part 34 extending rearward and downward from the connection part 33, and An adjusting portion 35 is provided as an engaged portion that extends rearward from the intermediate portion 34 and can be superimposed on the holding band 40. The adjustment portion 35 is formed in a straight line so as to be superposed on the holding band 40, and the plurality of concave portions 32 described above are formed in the band surface 31. Each recess 32 is formed in a rectangular shape that is long in a direction perpendicular to the band width direction, and has a side surface perpendicular to the thickness direction on the band tip side as shown in FIG. It has the inclined surface which inclines with respect to the thickness direction in the base end side which is.

  As shown in FIG. 3, the holding band 40 is connected to the other branch part 23 </ b> B so as to extend downward on the rear side, and a connection part 43 connected to the other branch part 23 </ b> B and a rear side from the connection part 43. An intermediate portion 44 that extends downward, and a holding portion 45 that extends rearward from the intermediate portion 44 and that can overlap the adjustment band 30 are provided. The holding portion 45 is formed in a straight line so that the adjustment band 30 can be overlaid. On the band surface 41 of the holding portion 45, there are a buckle mounting portion 46 for attaching a buckle on the distal end side of the band and an adjustment band 30 superimposed on the base end side which is the band branching portion side from the buckle mounting portion 46. A band holding portion 47 that is held along the line 41 is formed.

  Two buckle holding portions 46 </ b> A that protrude from the band surface 41 and extend along the direction in which the holding band 40 extends are disposed on the buckle attaching portion 46 so as to face each other in the width direction of the holding band 40. Between the two opposing buckle holding portions 46A, the adjustment band 30 can be inserted, and an interval at which the buckle 50 can be fitted is secured. In other words, the buckle 50 is fitted into the buckle attachment portion 46, and is attached to the buckle attachment portion 46 so that the side surfaces 51A and 51B face the corresponding buckle holding portions 46A.

  Referring also to FIG. 4, each buckle holding portion 46 </ b> A is provided with two fitting holes 46 a and 46 b for fitting the buckle 50 at predetermined intervals in the extending direction of the holding band 40. Yes. The band holding portion 47 is provided with a plurality of claws 48 protruding from the band surface 41 so as to form two rows along the direction in which the holding band 40 extends. The space | interval which can insert the adjustment band 30 which is more than this width | variety is ensured. Further, the leading end of each row of claws 48 has a protruding portion that protrudes in the direction of the other row, and an adjustment band that is not less than the thickness of the adjustment band 30 between the protruding portion and the band surface 41. The space | interval which can insert 30 is ensured. Thus, when the adjustment band 30 is inserted between the two rows of claws 48, the width direction of the adjustment band 30 is maintained between the parallel claws 48, and between the protruding portion and the band surface 41. The thickness direction of the adjustment band 30 is maintained.

  The buckle 50 is provided with a distal end portion 51 that is a free end portion that can be moved away from the band surface 41 in order to release the coupling, and a proximal end portion 52 that is connected to the holding band 40. In the present embodiment, the buckle 50 attached to the buckle attaching portion 46 has the tip 51 of the buckle 50 disposed on the tip of the holding band 40, which is the side facing the holding band 40 in the direction in which the adjustment band 30 enters. The base end portion 52 of the buckle 50 is disposed on the base end side of the holding band 40, which is the side facing the holding band 40 in the retracting direction of the adjustment band 30. When the wearer operates to apply a force from the distal end portion to the proximal end portion so that the distal end portion 51 is separated from the band, the holding band 40 is separated from the adjustment band 30, that is, the adjustment band 30 is held by the holding band. Power is applied so that it can be pulled out of 40. As a result, the disengagement operation of the tip 51 also becomes an operation of pulling out the adjustment band 30 from the holding band 40, and the release operation of the buckle 50 is performed by releasing the engagement of the buckle and the band required for releasing the headband 20. A plurality of operations for pulling out can be performed as a unit.

  As shown in FIG. 5, the buckle 50 is fitted and fixed to the holding band 40 to lock the adjustment band 30. The buckle 50 is released to unlock the band locking member 55 from the adjustment band 30. It is comprised from the member 70. FIG.

  The band locking member 55 is fitted between the two buckle holding portions 46 </ b> A, and sandwiches the adjustment band 30 superimposed on the holding band 40 between the band surface 41 of the holding band 40. . The band locking member 55 is provided with two support members 56 disposed so as to contact the band surface 41 and extending in a direction along the buckle holding portion 46A. The two support members 56 are arranged so as to sandwich the adjustment band 30 from the width direction by being opposed to each other in parallel along the corresponding buckle holding portions 46A.

  In addition, the band locking member 55 is provided with a connecting member 57 that maintains the interval between the two support members 56 that are opposed to each other in parallel to the interval through which the adjustment band 30 can be inserted. The connecting member 57 is provided at the tip 51 of the support member 56. The connecting member 57 is disposed so as to be orthogonal to the two support members 56, and is disposed so that the distance from the band surface 41 is longer than the thickness of the adjustment band 30. As a result, the band locking member 55 supports the connecting member 57 supported by the support member 56 in such a manner that the adjustment band 30 inserted between the holding band 40 and the connecting member 57 is straddled.

  Each support member 56 is provided with two convex portions 59 protruding in a direction facing the corresponding buckle holding portion 46A, that is, a direction not facing the other support member 56 at a predetermined interval. A predetermined interval is secured between the two convex portions 59, and the predetermined interval is the same as the interval between the two fitting holes 46a and 46b provided in the buckle holding portion 46A. By fitting the two support members 56 between the two buckle holding portions 46A, the convex portions 59 are fitted into the corresponding fitting holes 46a and 46b. Thereby, the band locking member 55 is fitted and fixed to the buckle holding portion 46A. That is, the buckle 50 is attached to the holding band 40.

  The support member 56 is provided with a convex guide 60 that protrudes from the connecting member 57 toward the base end portion 52 in a direction in which the support members 56 face each other. In the convex guide 60, the distance between the convex guide 60 and the band surface 41 is set to be slightly wider than the thickness of the adjustment band 30, and the adjustment band 30 inserted through the band locking member 55 is the holding band. 40 or the convex guide 60, while being held between the convex guide 60 and the band surface 41.

  As a result, the band locking member 55 is inserted into the space defined by the band surface 41, the two support members 56, and the two convex guides 60 while being attached to the buckle holding portion 46 </ b> A. It is possible to make it.

  Further, the band locking member 55 is provided with an elastic plate 61 as a cantilever-like biasing portion extending from the connecting member 57 in the direction of the base end portion 52. Although the elastic plate 61 is connected to the connecting member 57 at the base end, it is arranged in parallel between the two support members 56, that is, the other part is not connected to the band locking member 55. The tip of 61 can be elastically deformed in the direction of the band surface 41 or in the direction opposite to the band surface 41.

  As shown in FIG. 6, a claw portion 62 as an engaging portion protrudes toward the band surface 41 at the tip of the elastic plate 61. The claw portion 62 has a substantially triangular cross-sectional shape, and the surface facing the distal end (base end portion 52) of the elastic plate 61 is substantially perpendicular to the elastic plate 61, that is, the band surface 41 (31). On the other hand, it protrudes in the direction of the band surface 41 (31) as a surface substantially orthogonal to the surface. Further, the claw portion 62 has a band surface 41 as a surface in which the surface facing the base end (tip portion 51) of the elastic plate 61 is inclined with respect to the elastic plate 61, that is, a surface inclined with respect to the band surface 41 (31). It protrudes in the (31) direction. Furthermore, the tip of the claw portion 62 protruding in the direction of the band surface 41 (31) extends closer to the band surface 41 than the convex guide 60. Therefore, the elastic plate 61 applies a force that presses the adjustment band 30 that has entered between the band surface 41 and the convex guide 60 in the thickness direction to the claw portion 62 as an urging force, and the claw portion 62 is applied to the adjustment band. It is made to enter into the recessed part 32 formed in the band surface 31 of 30, and is fitted.

  For these reasons, when the adjustment band 30 enters the buckle 50, the inclined surface of the recess 32 comes into contact with the inclined surface of the claw portion 62. Therefore, when a force in the approach direction is applied to the recess 32, the inclined surface of the recess 32 moves in the approach direction while pushing up the elastic plate 61 via the inclined surface of the claw portion 62. On the other hand, when the adjustment band 30 is pulled out from the buckle 50, the vertical side surface of the recess 32 abuts on the vertical surface of the claw portion 62. Therefore, when a force is applied in the direction in which the concave portion 32 is pulled out, the concave portion 32 of the adjustment band 30 and the claw portion 62 are engaged with each other, so that the relative positional relationship between them cannot be changed. The position will be maintained.

  A connected portion 63 is formed at the tip of the claw portion 62 of the elastic plate 61. The coupled portion 63 has a surface facing the band surface 41, and has a groove facing the band surface 41 on the surface.

  The band locking member 55 is made of a thermoplastic resin such as polycarbonate (PC) or polyacetal (POM). Polycarbonate and polyacetal can impart appropriate durability to the claw portion 62 that engages with the adjustment band 30 and can appropriately suppress wear of the concave portion 32 of the adjustment band 30 with which the claw portion 62 is engaged. . Also, an appropriate elastic force can be applied to the elastic plate 61. As the thermoplastic resin, polyethylene, polystyrene, polyvinyl chloride, or the like may be used.

  Each support member 56 is formed with a cylindrical shaft portion 64 that protrudes toward the buckle holding portion 46A from the side surface facing the corresponding buckle holding portion 46A, which is the outer side surface on the base end portion 52 side. . That is, the shaft portion 64 protrudes from the support member 56 in a direction that does not face the other support member 56. Note that the buckle holding portion 46 </ b> A is formed with a recess at a portion corresponding to the shaft portion 64 so as not to interfere with the shaft portion 64. The two shaft portions 64 are respectively arranged at equal intervals from the connecting member 57. That is, the two shaft portions 64 are formed so as to be substantially orthogonal to the direction in which the holding band 40 extends and to be disposed on one shaft parallel to the band surface 41.

  A resin spring 65 is installed between the support members 56 on the inner side surface on the base end portion 52 side. The resin spring 65 has a protruding portion 66 as an abutting portion that protrudes further toward the base end portion 52 between both the support members 56. In the present embodiment, the resin spring 65 is a rod-shaped member that connects the two support members 56, and the protruding portion 66 is formed to protrude toward the base end portion 52 in such a manner as to bypass the base end portion 52 side. .

  As shown in FIG. 5, the release member 70 is a member for releasing the engagement of the adjustment band 30 to the holding band 40 by the band locking member 55, and is formed from a thermoplastic resin such as polycarbonate (PC). ing. Note that polyacetal, polyethylene, polystyrene, polyvinyl chloride, or the like may be used as the thermoplastic resin.

  The release member 70 includes a plate-like base material 71 provided so as to face the band surface 41 in parallel, and the above-described tip portion 51 is provided in the tip direction of the holding band 40 in the base material 71. The above-described base end portion 52 is provided in the base 71 in the base end direction of the holding band 40. In addition, the release member 70 includes two bearing portions 72 in which the two shaft portions 64 of the band locking member 55 are rotatably fitted to the base end portion 52, and the release member 70 is attached to the distal end portion 51. An operation unit 73 to be operated is provided. Further, the release member 70 includes a hook 74 as a connecting portion that contacts the connected portion 63 of the band locking member 55 from the band surface 41 side between the bearing portion 72 and the operation portion 73, and a tip portion from the bearing portion 72. Pressure receiving portion 75 extending in a direction away from 51. In the present embodiment, since the pressure receiving portion 75 is provided with the resin gate portion for forming the release member 70, a recess is provided in that portion, and the resin in the resin gate portion does not protrude from the pressure receiving portion 75 after molding. I am doing so.

  Each bearing portion 72 is formed in a shape protruding from the base material 71, and a circular space 72 </ b> A for holding the corresponding shaft portion 64 is formed, and the circular space 72 </ b> A from the outside is formed at the tip in the protruding direction. A cut 72B for fitting the shaft portion 64 is formed. As a result, the bearing portion 72 fitted with the shaft portion 64 can be rotated about the central axis of the shaft portion 64 as a rotation center.

  The operation part 73 is a part for the wearer to operate with a finger, and is formed with a recess for facilitating the application of the finger. Further, in order to make it easier to put a finger or to search with a finger, the operation unit 73 may be raised from the base material 71 in the direction opposite to the band surface 41, that is, in the outer direction.

  The hook 74 is a part for pulling up the engaged portion 63 to be engaged in the direction opposite to the band surface 41, and protrudes from the base material 71 toward the band surface 41, and at the distal end portion 51 side at the distal end. A return portion 74A is formed. The return portion 74 </ b> A has a groove formed on the surface facing the base material 71, and can be fitted with the groove facing the groove formed in the coupled portion 63. Further, since the hook 74 is provided between the bearing portion 72 and the operation portion 73, the force required to move the hook 74 can be adjusted by the lever principle. That is, the force applied to the operation unit 73 acts on the hook 74 as a larger force due to the structure in which the action point is the hook 74, the fulcrum is the bearing unit 72, and the force point is the operation unit 73. ing.

  The pressure receiving portion 75 is disposed in the opposite direction of the distal end portion 51 from the bearing portion 72, that is, in the proximal end portion 52. Since the base end portion 52 corresponds to the base material 71 that is inclined so as to approach the band surface 41, the pressure receiving portion 75 is in contact with the protruding portion 66 that protrudes along the band surface 41 from the resin spring 65. It has become.

Next, the effect | action of this buckle for helmets is demonstrated with reference to FIG.
As shown in FIG. 7, when the tip 51 is pushed up in the direction of separating from the band surface 31 (41), the direction of the arrow in the figure, the base material 71 of the release member 70 tilts around the shaft 64. Along with this tilting, the hook 74 moves in a direction away from the band surface 31 (41), the return portion 74A of the hook 74 abuts on the connected portion 63 of the elastic plate 61, and the connected portion 63 is moved to the band surface. It moves in the direction away from 31 (41). As the connected portion 63 moves away from the band surface 31 (41), the elastic plate 61 and the claw portion 62 move away from the band surface 31 (41). It comes off from the recess 32 of the adjustment band 30. Thereby, the engagement between the adjustment band 30 and the holding band 40 is released, that is, the tilting force acting on the release member 70 is converted into the release force of the engagement, and the adjustment band 30 can be pulled out from the holding band 40. It becomes.

  Further, when the distal end portion 51 of the release member 70 is pulled, a force pushing the buckle 50 toward the proximal end portion 52 is applied to the distal end portion 51, so that the force from the buckle 50 toward the proximal end portion 52 is maintained. Applied to the band 40, the holding band 40 is pulled toward the proximal end. By the way, in order to loosen the headband 20, the holding band 40 and the adjustment band 30 are overlapped by pulling at least one of the holding band 40 and the adjustment band 30 in the direction of the proximal end of the holding band 40 or the adjustment band 30. Try to shorten the mating length. That is, by pulling the distal end portion 51 of the release member 70, the engagement between the adjustment band 30 and the holding band 40 is released, and the holding band 40 is pulled toward the base end portion. The band can be released and loosened in one operation, which must be operated separately.

  As shown in FIG. 7, in this embodiment, when the holding band 40 is moved to the right, the adjustment band 30 is pulled out, that is, the headband 20 is loosened. In this case, when the buckle 50 is operated with the right hand turned to the back of the head, a force in the right direction, which is the direction in which the arm returns to the natural position, is automatically applied to the buckle 50 together with the force to lift the tip 51 away from the band. Will come to be. For this reason, the above-described release and loosening of the band can be performed as one action in the natural movement of the hand or arm.

  Next, a branch structure of the main band 21, the adjustment band 30, and the holding band 40 will be described with reference to FIG. Note that the branch structure of the other branch portion 23B and the holding band 40 is different from the branch structure of the one branch portion 23A and the adjustment band 30 in the mirror image relationship, but the other structures are the same. . Therefore, in the following, the branch structure of one branch portion 23A and the adjustment band 30 will be described, while the description of the branch structure of the other branch portion 23B and the holding band 40 will be omitted.

  As shown in FIG. 8, one branch portion 23 </ b> A of the main band 21 has a first convex portion 90 formed in a circular shape and a second convex portion formed concentrically on the outer periphery of the first convex portion 90. 91, a third convex portion 92 concentrically formed on the outer periphery of the second convex portion 91, and a fourth convex portion 93 formed of a concentric circular arc on the outer periphery of the third convex portion 92, respectively. A through hole 90 </ b> A including the center of a circle such as the first convex portion 90 is formed in the center of the first convex portion 90. Four rib portions 92a each having a circular arc shape obtained by dividing the circumference of the outer surface into four parts are provided on the outer surface of the protruding end portion of the third convex portion 92. In consideration of the range in which the adjustment band 30 may move, the fourth convex portion 93 is in the range of 100 ° to 180 ° with respect to the center of the circle from the third convex portion 92 to the front portion of the main band 21. It is preferable to be provided. Considering a highly convenient movable range, it is preferably provided at approximately 170 °, that is, the center angle is particularly preferably approximately 170 °. With this setting, as will be described later in detail, the adjustment band 30 can be prevented from rotating more than necessary. A positioning pin 94 is formed to project from the rear portion of the main band 21.

  Further, the connecting portion 33 of the adjustment band 30 is formed with a central shaft 80, a first projecting portion 82 formed concentrically outside the central shaft 80, and a concentric circle formed on the outer periphery of the first projecting portion 82. A second protrusion 83 and a third protrusion 84 formed concentrically on the outer periphery of the second protrusion 83 are provided. A folded portion 81 having a shape that opens toward the adjustment band 30 is provided at the tip of the central shaft 80. A groove that is recessed toward the outer periphery is formed on the inner peripheral surface of the third protrusion 84. An arcuate pin guide portion 85 is recessed in the intermediate portion 34 extending from the connecting portion 33 along the outer periphery of the third protruding portion 84. The pin guide portion 85 is a portion formed in an arc shape in the intermediate portion 34, and the inner peripheral surface on the inner side is constituted by the outer periphery of the third protruding portion 84. In addition, the pin guide portion 85 is provided with stoppers 86 at both ends of the arc in the recess, and a plurality of protrusions projecting in the center direction of the circle on the outer inner peripheral surface facing the inner inner peripheral surface of the third projecting portion 84. A plurality of positioning guides 88 including a plurality of recesses between the arcuate convex portions 87 are provided.

  Then, the connecting portion 33 of the adjustment band 30 is fitted into one branch portion 23 </ b> A of the main band 21. That is, the central shaft 80 is inserted into the through hole 90A, and the folded portion 81 of the central shaft 80 inserted through the through hole 90A is opened, so that the central shaft 80 is prevented from being removed from the through hole 90A. In addition, a first protrusion 82 as a sliding protrusion is fitted into the sliding groove formed between the first protrusion 90 and the second protrusion 91, and the first protrusion 82 and the second protrusion A second convex portion 91 as a sliding projection is fitted into the sliding groove formed between the projection 83. The third convex portion 92 is abutted and fitted to the inner peripheral outer surface of the third projecting portion 84, and the inner peripheral outer surface of the third projecting portion 84 is opened by turning back the rib portion 92 a at the tip of the third convex portion 92. The third protrusions 92 are prevented from coming off from the third protrusions 84 by being fitted into the grooves formed in the first protrusions 84. Further, the outer periphery of the third projecting portion 84 is in contact with the fourth projecting portion 93, thereby preventing the third projecting portion 92 from coming off from the inner periphery of the third projecting portion 84.

  A positioning pin 94 is inserted into the pin guide portion 85. The portion where the positioning guide 88 is formed in the pin guide portion 85 has a space similar to the width of the positioning pin 94 between the inner inner peripheral surface and the outer inner peripheral surface. Therefore, the positioning pin 94 is fixedly held at the position of one of the positioning guides 88. In addition, since the width | variety of the part in which the circular arc-shaped convex part 87 is provided is only narrow, the circular arc-shaped convex part 87 can also be moved to the other positioning guide 88 which adjoins by applying strong force. Thereby, the positioning of the adjustment band 30 with respect to the main band 21 is performed with a reliable operational feeling, and the positioning position is suitably held. That is, the adjustment band 30 can be rotated with respect to the one branch portion 23A by an angle range corresponding to an angle at which the arcuate convex portion 87 can move within the pin guide portion 85. Further, according to the central angle set on the fourth convex portion 93 of the main band 21, both ends of the fourth convex portion 93 are connected when the adjustment band 30 rotates about the central axis 80 of the connecting portion 33. Since the part from 33 to the intermediate part 34 contacts, it becomes possible to suppress the rotation of the adjustment band 30 more than necessary.

  By the way, there exists a possibility that the branch part 23A and the connection part 33 which are formed from polyethylene may be distorted by an external force. In the present embodiment, the branch portion 23A and the connecting portion 33 can be similarly distorted with respect to some bending by giving the branch portion 23A and the connecting portion 33 the same flexibility. Become. Further, by fitting the branching portion 23A and the connecting portion 33 by a combination of a plurality of convex portions and projecting portions, the fitting can be maintained with respect to some bending and the mobility can also be maintained. It is like that.

As described above, according to the helmet buckle of this embodiment, the effects listed below can be obtained.
(1) When the distal end portion 51 of the release member 70 rotates in the direction away from the band, a release force is applied to the claw portion 62 of the band locking member 55 via the hook 74 of the release member 70, and the band engagement The engagement between the claw portion 62 of the stop member 55 and the band adjustment portion 35 is released. At this time, since the band is released using the lever principle, the force required to release the engagement between the band adjustment portion 35 and the claw portion 62 of the band locking member 55 is reduced. Regardless, the force required to operate the distal end portion 51 of the release member 70 can be appropriately adjusted.

  Further, part of the urging force applied to the claw portion 62 of the band locking member 55 continues to act on the distal end portion 51 of the release member 70 via the hook 74 of the release member 70. Therefore, when the tip 51 does not receive the tilting force in the direction away from the band, the tip 51 is arranged at a position close to the band according to the biasing force described above. Thereby, since the band is connected in a state where the release member 70 including the distal end portion 51 is close to the band in its rotation range, the buckle having such a release member 70 can be reduced in size.

  (2) The cantilevered elastic plate 61 in the claw portion 62 applies a biasing force to the claw portion 62, and the hook 74 of the release member 70 is connected to the tip of the elastic plate 61. Therefore, in order to make the gaps between the plurality of concave portions 32 and the claw portions 62 as much as possible, it is possible to reduce the force applied to the elastic plate 61 as compared to the mode in which the hook 74 is connected in addition to the tip of the elastic plate 61. is there. Therefore, in releasing the engagement between the band adjustment portion 35 and the claw portion 62 of the band locking member 55, it is possible to reduce the rotational force required for the distal end portion 51 of the release member 70. In addition, the operability of the buckle can be improved.

  (3) Since the hook 74 comes into contact with the distal end portion of the elastic plate 61 from the band side of the distal end portion, the space between the elastic plate 61 and the band is connected to the band locking member 55 and the release member 70. It becomes possible to use as. Therefore, it is possible to reduce the thickness of the buckle.

  (4) Since the band locking member 55 and the release member 70 are integrated by fitting the shaft portion 64 and the resin bearing portion 72 that can be fitted to and removed from the shaft portion 64, the band locking member 55. Assembling of the buckle 50 including the release member 70 is facilitated. Further, since the band locking member 55 and the release member 70 are configured to be rotatable via the shaft portion 64, the rotation operation of the distal end portion 51 of the release member 70 is facilitated, and the distal end portion 51 is facilitated. And the base end portion 52 can be reduced in fatigue every time the release operation is performed. Therefore, compared to a case where the base end portion 52 and the band locking member 55 are connected by a flexible member, durability against repeated release operations can be improved.

(5) When the release operation is not performed, the distal end portion 51 of the release member 70 is held at a position close to the band. For this reason, the buckle can be more suitably downsized.
(6) By using a member that is harder than the band for the band locking member 55, the urging force that the elastic plate 61 of the band locking member 55 applies to the claw portion 62 or the protruding portion 66 of the band locking member 55 is released. The biasing force applied to the member 70 can be increased.

  (7) Since the tightening position of the band can be adjusted by the buckle 50, the uncomfortable feeling felt by the wearer can be suppressed. Also, as a band, suitability to the shape of the head is improved, and appropriate wearing is expected.

  (8) Since the sliding groove of the branch portion 23A (23B) and the sliding protrusions of the adjustment band 30 and the holding band 40 are fitted over the entire circumference, the adjustment band 30 and the holding portion are attached to the mounting portion. While the band 40 can be rotated, the fitting force of these bands can be increased, so that the possibility of such a fitting being released is reduced. That is, since the band is made of a flexible material, the branch part and each band may be distorted by an external force, but since the fitting length between the branch part and each band is long, The maintaining power of the fitting state against the strain is increased. Further, since the sliding groove and the sliding protrusion are formed of the same material as the branching portion and each band, it can be distorted to some extent while maintaining the fitting. Thereby, the flexibility of the headband of the helmet is maintained.

(9) Appropriate strength and flexibility can be imparted to the rotatable branch structure formed in the band.
(Other embodiments)
In addition, the said embodiment can also be implemented with the following aspects.

  In the above embodiment, the case where the elastic plate 61 having a predetermined width is extended from the connecting member 57 of the band locking member 55 to the claw 62 portion is illustrated. However, the present invention is not limited to this, and the elastic plate may be provided in any shape as long as the claw portion can be pressed against the adjustment band and fitted into the recess of the adjustment band. For example, as shown in FIG. 9, the elastic plate extended from the connecting member 57 may be composed of a thin portion 61A and a claw support portion 61B. That is, the thickness of the thin portion 61A may be made thinner than the connecting member 57, or the width of the thin portion 61A may be made narrower than that of the claw support portion 61B. Thus, by changing the thickness of the thin wall portion 61A or changing the width, the pressing force of the claw portion 62 against the adjustment band is adjusted, and the force required for the release operation by the buckle is adjusted by the elastic plate 61. Can be adjusted. Thereby, the freedom degree of design as a buckle for helmets becomes high.

  In the above-described embodiment, the case where the protruding portion 66 is provided in such a manner that the rod-shaped resin spring 65 is bypassed is illustrated. However, the present invention is not limited thereto, and the protrusion may be provided so as to protrude from a resin spring provided in a straight line so as to be orthogonal to the support member. That is, it is only necessary to be able to urge the force in the direction away from the band surface with respect to the opposite side of the free end across the rotation shaft of the release member. As a result, the design freedom of the buckle is increased, and the position of the operation member on the buckle can be suitably maintained.

  In the above embodiment, the release member 70 is illustrated as being rotatable with respect to the band locking member 55. However, the present invention is not limited to this, and the release member may be operated in the opposite direction of the band in order to move the claw portion of the band locking member in the opposite direction of the band. For example, if the release member is movable by being bent with respect to the band locking member, for example, the release member is connected to the band locking member by a plate-like member, the release member is locked. The aspect of fixing to the member may be any form. Thereby, the freedom degree of a buckle structure comes to improve.

  -In above-mentioned embodiment, it illustrated about the case where the cancellation | release member 70 and the band latching member 55 consist of another member. However, the present invention is not limited to this, and if the release member can be operated in the opposite direction of the band in order to move the claw portion of the band engagement member in the opposite direction of the band, the release member and the band engagement member are more It may be formed. In this case, the release member may be formed so as to bend with respect to the band locking member. Thereby, the freedom degree of a buckle structure comes to improve.

  In the above embodiment, the release member 70 is illustrated as being biased by the pressure receiving portion 75. However, the present invention is not limited to this, and the release member may not be biased by the pressure receiving portion. In this case, a resin spring is not required for the band locking member. Even in this case, it is possible to prevent the operation portion of the release member from being separated from the band surface by the contact between the coupled portion and the hook. Thereby, the design freedom as a buckle for a helmet improves.

  DESCRIPTION OF SYMBOLS 10 ... Cap body, 12 ... Opening part, 14 ... Folding part, 20 ... Headband, 21 ... Main band, 22 ... Band locking part, 23A ... Branching part, 23B ... Branching part, 30 ... Adjustment band, 31 ... Band Surface, 32 ... concave portion, 33 ... connecting portion, 34 ... intermediate portion, 35 ... adjusting portion, 40 ... holding band, 41 ... band surface, 43 ... connecting portion, 44 ... intermediate portion, 45 ... holding portion, 46 ... buckle mounting Part 46A ... Buckle holding part 46a, 46b ... fitting hole 47 ... band holding part 48 ... claw part 50 ... buckle 51 ... tip part 51A, 51B ... side face 52 ... base end part 55 ... Band locking member, 56 ... Support member, 57 ... Communication member, 59 ... Convex part, 60 ... Convex guide, 61 ... Elastic plate, 61A ... Thin part, 61B ... Claw forming part, 62 ... Claw part, 63 ... Coated Connecting part, 64 ... shaft part, 65 ... resin spring, 66 ... protrusion , 70 ... release member, 71 ... base material, 72 ... bearing part, 72A ... circular space, 72B ... notch, 73 ... operation part, 74 ... hook, 74A ... return part, 75 ... pressure receiving part, 80 ... central axis, 81: Folded portion, 82: First protruding portion, 83: Second protruding portion, 84: Third protruding portion, 85: Pin guide portion, 86 ... Stopper, 87 ... Arc-shaped convex portion, 88 ... Positioning guide, 90 ... 1st convex part, 90A ... through-hole, 91 ... 2nd convex part, 92 ... 3rd convex part, 92a ... rib part, 93 ... 4th convex part, 94 ... positioning pin.

Claims (10)

A helmet buckle that is provided at one end of a band used for wearing a helmet and connects the band by engagement with an engaged portion formed at the other end of the band,
A band locking member attached to the one end of the band;
A release member that is tiltably attached to the band locking member,
The band locking member is
An engaging portion that engages with the engaged portion;
A biasing portion that applies a biasing force that biases the engaging portion to the engaged portion to the engaging portion;
The release member is
A base end portion that is a tilt center connected to the band locking member;
A tip that approaches and separates from the band by tilting the release member;
A coupling portion coupled to the urging portion between the base end portion and the distal end portion;
A release force against the urging force is applied to the engaging portion through the connecting portion when the tip portion receives a tilting force in a direction of detachment from the band. buckle. The engaged portion has a serrated engaged tooth row,
The engaging portion has a claw portion engageable with the engaged tooth row,
The urging portion has a cantilever beam to which the claw portion is connected and applies the urging force to the claw portion,
The helmet buckle according to claim 1, wherein the connecting portion is connected to a tip of the cantilever. The connecting portion has a hook that engages with a tip of the cantilever;
The helmet buckle according to claim 2, wherein the hook return comes into contact with the band side at the tip of the cantilever. The band locking member has a shaft portion extending along the band surface;
The base end portion of the release member has a bearing portion that rotatably supports the shaft portion,
The buckle for a helmet according to any one of claims 1 to 3, wherein the bearing portion is made of a resin that can be fitted to and detached from the shaft portion. The release member has a plate shape that covers the opposite side of the band locking member from the band,
The band locking portion has a contact portion that contacts the band side at the base end portion of the release member,
The abutting portion biases the base end portion of the release member in a direction to separate from the band, and biases the distal end portion of the release member in a direction to approach the band. The buckle for helmets as described in any one of 1-4. The helmet buckle according to any one of claims 1 to 5, wherein the band locking member and the release member are formed of a resin material harder than the band. A helmet with a headband,
The headband includes an attachment portion attached to the helmet, and two branch bands each branched from two branch portions provided on the attachment portion and connected via a buckle in the rear direction on the back of the head. Have
One of the two branch bands has an engaged portion on the band surface,
The other branch band of the two branch bands includes a band support portion for inserting and supporting the one branch band,
The said band support part has a buckle for helmets as described in any one of Claims 1-6 as a buckle which connects the said two branch bands. The helmet characterized by the above-mentioned. The helmet according to claim 7, wherein the band is rotatably connected to the branch portion. The branch portion has a plurality of concentric sliding grooves,
The helmet according to claim 8, wherein the branch band has a plurality of sliding protrusions concentrically formed on a surface facing the branch portion and fitted into each of the plurality of sliding grooves. The helmet according to claim 8 or 9, wherein the branch band is formed of a resin material containing polyethylene.

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