Buckle for helmet and helmet

Abstract

To provide a buckle which prevents unlocking against the intention of a user without excessively complicating the operation of removing a band from the buckle.SOLUTION: A locking member 31 including a base 21 and a locking portion 35 locked to the claw portion 11, the locking member 31 being rotationally biased in a locking direction in which the locking portion 35 is locked to the claw portion 11 of the band 8 inserted between the locking portion 35 and the bottom plate 22 from an insertion direction of the band 8; When the operating member 41 is operated in the first operating direction, the operating member 41 is moved from the standby position where it is not associated with the locking member 31 to the lock-releasable position where it can be associated with the locking member 31, and when the operating member 41 is operated in the second operating direction, the operating member 41 rotates the locking member 31 in the anti-locking direction to bring the locking member 31 from the locked state to the unlocked state of the locking portion and the claw portion 11.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a helmet buckle and a helmet. [Background technology]

[0002] Helmets such as motorcycle helmets are equipped with a pair of left and right chin straps, one of which has a band with a ratchet and the other has a buckle.

[0003] For example, the buckle in Patent Document 1 includes a base unit, a lock unit, and an operation unit. The lock unit is rotatable relative to the base unit. The operation unit is slidable relative to the base unit. When the operation unit is slid in one direction, an inclined portion at the tip of the operation unit rotates the lock unit so as to lift it up. This releases the lock unit from the claw portion on the band. In other words, with this buckle, the user can remove the band from the buckle simply by performing a single operation of sliding the operation unit in one direction. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] European Patent No. 3238558 Summary of the Invention [Problem to be solved by the invention]

[0005] From the viewpoint of ease of use, it is desirable for the buckle used in the chin strap of a helmet to be able to release the band from the buckle with a simple operation. On the other hand, it is undesirable for the lock to be released against the user's will. The buckle must be able to be unlocked with a simple operation when the user wishes to unlock it. [Means for solving the problem]

[0006] The helmet buckle for solving the above problem is a buckle for fixing a band having a claw portion on one surface, and includes a bottom plate and a pair of side plates. The buckle includes a base into which the band is inserted so that the other surface opposite to the one surface contacts the bottom plate in an inner space defined by the bottom plate and the pair of side plates. The buckle includes a locking portion that is locked to the claw portion, and a locking member that is rotated from the insertion direction of the band in a locking direction in which the locking portion is locked to the claw portion of the band inserted between the locking portion and the bottom plate. and an operating member that rotates the locking member in a counter-locking direction opposite to the locking direction to release the locked state between the claw portion and the locking portion, and when the operating member is operated in a first operating direction, it is moved from a standby position not linked to the locking member to a lock-release position where it can be linked, and when the operating member is operated in a second operating direction intersecting the first operating direction, it directly or indirectly rotates the locking member in the counter-locking direction, causing the locking member to switch from the locked state to a unlocked state between the claw portion and the locking portion.

[0007] A helmet for solving the above problem is a helmet comprising a first chin strap having a band, and a second chin strap having a buckle for fixing the band, wherein the band has a claw portion on one side, and the buckle has a bottom plate and a pair of side plates, and comprises a base into which the band is inserted so that the other side opposite to the one side contacts the bottom plate in an inner space defined by the bottom plate and the pair of side plates, and a locking portion that is locked to the claw portion, and the locking portion is locked to the claw portion of the band inserted between the locking portion and the bottom plate from the insertion direction of the band. and an operating member that directly or indirectly rotates the locking member in a counter-locking direction opposite to the locking direction to release the lock state between the claw portion and the locking portion, wherein the operating member is moved from a standby position not linked to the locking member to a lock-release position where it can be linked, when operated in a first operating direction, and is operated in a second operating direction intersecting the first operating direction to directly or indirectly rotate the locking member in the counter-locking direction, causing the locking member to switch from the locked state to a state where the claw portion and the locking portion are unlocked.

[0008] According to the above configuration, the operating member, which is in the standby position, is operated in a first operating direction. As a result, the operating member moves to an unlockable position where the locking state between the claw portion and the locking portion can be released. Next, while continuing to press the operating member in the first operating direction, the operating member is further operated in a second operating direction intersecting the first operating direction. This causes the operating member to rotate the locking member in the counter-locking direction. This releases the locking state between the claw portion and the locking portion. By maintaining this state, the band can be pulled out of the buckle. In this way, operation in two directions is required to unlock the buckle. This prevents the buckle from being unlocked against the user's will. Furthermore, the lock is released by operating the operating member in the first operating direction and then continuously operating it in the second operating direction. This also prevents the operation method for unlocking from becoming too complicated.

[0009] The above-mentioned helmet buckle and helmet may further include a cover disposed on the base and covering the locking member, the operating member having a user operation unit facing the outside from the cover, and the operating member may be configured to be movable in the first operating direction relative to the cover via the user operation unit and rotatable in the second operating direction.

[0010] According to the above-described configuration, the cover covers the interior space of the base, making it possible to prevent malfunction of the locking member and the operating member disposed in the interior space. The operating member can be operated from the portion exposed to the outside through the cover.

[0011] In the helmet buckle and the helmet, the cover may be configured to define an insertion opening for the band together with the base. According to the above configuration, the insertion opening is defined by the cover, and the opening is limited, making it easier to insert the insertion end of the band between the base and the locking portion.

[0012] The above-mentioned helmet buckle and helmet may further include a first biasing member that biases the locking member to rotate in the locking direction. According to the above-mentioned configuration, the locking portion can be reliably locked to the claw portion by the biasing force of the first biasing member.

[0013] The above-mentioned helmet buckle and helmet may further comprise a second biasing member that biases the operating member in a counter-first operating direction that is opposite to the first operating direction. According to the above-mentioned configuration, the operating member can be configured to move to the unlockable position only when the user operates it in the first operating direction due to the biasing force of the second biasing member.

[0014] In the above-described helmet buckle and helmet, the operating member may be configured to directly rotate the locking member in the anti-locking direction when pressed in the second operating direction. According to the above-described configuration, the locking member can be directly rotated by operating the operating member, thereby suppressing an increase in the number of parts.

[0015] The above-mentioned helmet buckle and helmet may further include an indirect member that rotates the locking member in the counter-locking direction when the operating member is pulled up in the second operating direction. According to the above-mentioned configuration, by interposing the indirect member, the rotation of the locking member when the operating member is pulled up in the second operating direction can be made in the counter-locking direction. [Effects of the Invention]

[0016] According to the present invention, it is possible to prevent the band from being unlocked against the user's will without making the operation of releasing the band from the buckle excessively complicated. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. [Figure 2] FIG. 2 is a perspective view of the buckle according to the first embodiment. [Figure 3] FIG. 2 is an exploded perspective view of the buckle according to the first embodiment. [Figure 4] FIG. 2 is a plan view of the buckle and the band in the first embodiment. [Figure 5] FIG. 2 is a rear view of the buckle according to the first embodiment. [Figure 6] 1 is a side view showing a state before a band is inserted in the buckle according to the first embodiment. FIG. [Figure 7] 1 is a cross-sectional view showing a state before a band is inserted in a buckle according to a first embodiment. [Figure 8] 4 is a side view showing a state in which the claw portion and the locking portion are locked in place in the first embodiment. FIG. [Figure 9] 4 is a cross-sectional view showing a state in which a claw portion and a locking portion are locked together in the first embodiment. FIG. [Figure 10] 1 is a side view of the buckle according to the first embodiment, showing a state in which an operating member is pressed in a first operating direction. [Figure 11] 3 is a cross-sectional view of the buckle according to the first embodiment, showing a state in which an operating member is pressed in a first operating direction. FIG. [Figure 12] 4 is a cross-sectional view of the buckle according to the first embodiment, showing a state in which the lock is released by pressing the operating member in a second operating direction, which is a release direction. FIG. [Figure 13] FIG. 10 is a perspective view of a buckle according to a second embodiment. [Figure 14] FIG. 10 is an exploded perspective view of a buckle according to a second embodiment. [Figure 15] FIG. 10 is a side view showing a state before a band is inserted in a buckle according to a second embodiment. [Figure 16] FIG. 10 is a cross-sectional view showing a state before a band is inserted in a buckle according to a second embodiment. [Figure 17] 10 is a side view of the buckle according to the second embodiment, showing a state in which the operating member is pressed in a first operating direction. FIG. [Figure 18] 10 is a cross-sectional view of a buckle according to a second embodiment, showing a state in which an operating member is pressed in a first operating direction. FIG. [Figure 19] 10 is a cross-sectional view of the buckle according to the second embodiment, showing a state in which the lock is released by pulling up the operating member in a second operating direction, which is the release direction. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] A helmet to which the present invention is applied will be described with reference to FIGS. [First embodiment] [Overall structure] The helmet 1 shown in FIG. 1 is, for example, a helmet such as a motorcycle helmet. The helmet 1 has a spherical shell 2. The shell 2 forms the outer shell of the helmet. The shell 2 is a semi-spherical resin member. The shell 2 houses, for example, an impact absorbing liner 3, which is an interior member for absorbing impact. The shell 2 has a vision opening to ensure visibility. The helmet 1 has a shield, which is a colorless, transparent plate member that is light-transmitting. The shield opens and closes the vision opening.

[0019] The shell 2 has a mounting opening 4. The mounting opening 4 is formed in a lower region of the shell 2. The mounting opening 4 is an opening for inserting the user's head. A pair of left and right chin straps 6, 7 are attached to the mounting opening 4. The base ends of each of the left and right chin straps 6, 7 are fixed to the shell 2. A band 8 having a ratchet is attached to the free end of one of the first chin straps 6. A buckle 9 is attached to the free end of the other second chin strap 7. The pair of left and right chin straps 6, 7 become continuous when the band 8 and buckle 9 are connected.

[0020] 〔band〕 As shown in Figures 3 and 4, the chin straps 6 and 7 are strip-shaped members made of synthetic resin and flexible in the thickness direction. The band 8 is a metal sheet made of stainless steel or other metal, with an arc-shaped tip. This arc-shaped portion is the insertion end 16 into the buckle 9. One surface of the band 8 is formed with a ratchet. Specifically, the band 8 has multiple pawls 11 forming the ratchet arranged along its longitudinal direction. The multiple pawls 11 are arranged side by side in the longitudinal direction at a central position in the width direction perpendicular to the longitudinal direction, and a recess 12 is formed between adjacent pawls 11. Each pawl has an inclined surface 13 on the tip side of the band 8 and a locking surface 14 on the opposite side. The locking surface 14 is, for example, a vertical surface on which the locking portion of the buckle 9 can be locked. The other surface of the band 8 opposite the surface on which the ratchet is arranged is a flat surface that contacts the bottom plate of the base 21. The base end of band 8 is provided with attachment holes 15 for attaching first chin strap 6. Band 8 functions as an adjuster for adjusting the length of chin straps 6, 7 by engaging claw portions 11 at any position with locking portions 35 of locking member 31.

[0021] 〔buckle〕 2 and 3, the helmet buckle 9 includes a base 21, a locking member 31, and an operating member 41. The buckle 9 further includes a cover 51.

[0022] 〔base〕 The base 21 includes a bottom plate 22 and a pair of side plates 23, and defines an internal space 24. The base 21 is formed by bending a metal plate. The internal space 24 is a space in which the locking member 31 and the cover 51 are disposed. The band 8 is inserted into the internal space 24 between the bottom plate 22 and the locking member 31. The inner surface of the bottom plate 22 is flat to facilitate movement of the band 8. The band 8 is inserted along the bottom plate 22. The bottom plate 22 has an insertion end 22a of the band 8 that is arc-shaped. The insertion end 22a is also curved downward to serve as an insertion guide. The attachment end 22b of the bottom plate 22, opposite the insertion end 22a, is the attachment side for the second chin strap 7. The bottom plate 22 has an attachment hole 25 near the attachment end 22b for attaching the second chin strap 7.

[0023] The pair of side plates 23 are taller on the insertion side end 22a side than on the attachment side end 22b side. The pair of side plates 23 are provided with support holes 26 near the insertion side end. The pair of support holes 26 support both ends of a support shaft 29 that rotatably supports the locking member 31. The pair of side plates 23 also have positioning recesses 27 for attaching the cover 51 on the vertical side edges on the attachment side end 22b side.

[0024] [Locking member] The locking member 31 includes a locking plate 32, a pair of rotation support pieces 33, and a pair of operated pieces .

[0025] The locking plate 32 has locking portions 35 between a pair of pivot support pieces 33 that are locked onto the locking surfaces 14 of the claw portions 11 of the band 8. The locking portions 35 are composed of edges, steps, etc. that face the locking surfaces 14. In the first embodiment, the locking portions 35 are provided in two rows, consisting of the edges of the locking plate 32 and the steps formed on the locking plate 32 (see FIG. 9). Of course, the number of locking portions 35 may be one row, or three or more rows.

[0026] The pair of rotation support pieces 33 have through holes 36 through which the support shafts 29 are inserted. The locking portions 35 are located on the opposite side of the rotation fulcrum of the locking member 31. The locking portions 35 move toward and away from the bottom plate 22 by rotating around the support shafts 29. The rotation support pieces 33 also have operated pieces 34 that are bent inward. A portion of an operating member 41 fits under the operated piece 34. As a portion of the operating member 41 fits under the operated piece 34, the locking member 31 is rotated by being lifted by the operating member 41.

[0027] 〔cover〕 The cover 51 includes a covering portion 52, a support portion 53, and a side wall portion 54. The covering portion 52 is a portion that covers the inner space 24, and covers the locking member 31 arranged in the inner space 24 from above. The support portion 53 is provided with an insertion hole 55 through which the support shaft 29 is inserted. The covering portion 52 is recessed relative to the end of the side wall portion 54, and forms an operation recess 59. The operation recess 59 exposes the user operation portion 42 of the operation member 41 to the outside.

[0028] The side wall portion 54 has positioning steps 56 that engage with positioning recesses 27 provided in the pair of side plates 23 of the base 21. The cover 51 is attached to the base 21 by inserting the support shaft 29 into the insertion hole 55 and engaging the positioning steps 56 with the positioning recesses 27. The cover 51 is not a member that moves relative to the base 21 by rotating, sliding, or the like, but is a member that is fixed integrally to the base 21.

[0029] The side wall 54 is provided with a guide groove 57 that guides the movement of the operating member 41. The guide groove 57 is a long, narrow groove that penetrates the band 8 and extends in a direction parallel to the insertion direction of the band 8. The end of the guide groove 57 on the insertion side of the band 8 is configured with an arc-shaped recess 57a that serves as a pivot point when the operating member 41 is pressed downward.

[0030] 5, the support portion 53 is a portion located above the insertion end portion of the bottom plate 22, and is provided with a guide recess 58 that forms the insertion opening 19 for the band 8. The guide recess 58 limits the size of the insertion opening 19, making it easier for the insertion end of the band 8 to be inserted between the bottom plate 22 and the locking plate 32.

[0031] Meanwhile, a first biasing member 39 is attached to the support shaft 29 to urge the locking portion 35 of the locking member 31 to rotate toward the bottom plate 22. The first biasing member 39 is, for example, a torsion coil spring, and includes a coil portion and a pair of arms extending from the coil portion. The support shaft 29 is inserted into the coil portion. One of the arms is engaged with the rear surface of the cover 51. The other arm is engaged with the locking plate 32. As a result, the biasing force of the first biasing member 39 biases the locking member 31 to rotate around the support shaft 29 in the locking direction (direction of arrow D2) in which the locking portion 35 approaches the bottom plate 22. In other words, the biasing force of the first biasing member 39 reliably engages the locking portion 35 with the claw portion 11 of the band 8.

[0032] [Operation member] The operation member 41 includes a user operation portion 42 and a rotation operation portion 43. The operation member 41 is a member disposed below the cover 51. The user operation portion 42 is located on the attachment end side of the bottom plate 22, and is exposed to the outside through an operation recess 59 of the cover 51.

[0033] The rotation operation portion 43 extends on the opposite side of the user operation portion 42. The rotation operation portion 43 is composed of two legs, with a space 44 formed therebetween. The upper surface of each rotation operation portion 43 is provided with a cam portion 45. The cam portion 45 is composed of an inclined surface that slopes downward toward the tip of the leg portion 44. When the cam portion 45 enters the underside of the operated piece 34, it lifts the locking member 31 against the biasing force of the first biasing member 39.

[0034] A second biasing member 49 is disposed in the space 44 and biases the operating member 41 in the opposite direction to the first operating direction (opposite the direction of arrow D1), which is also the insertion direction of the band 8. One end of the second biasing member 49 is supported by a holding portion 48a provided on the inner surface of the cover 51, and the other end is supported by a holding portion 48b provided on the side wall of the space 44. The holding portions 48a and 48b are, for example, recesses into which the coil fits, and are also configured with protrusions into which the coil fits.

[0035] The side wall of the operating member 41 is provided with a shaft 46. The shaft 46 engages the operating member 41 with a guide groove 57 of the cover 51. As a result, the shaft 46 of the operating member 41 is a horizontally elongated boss, and the portion facing the arc-shaped recess 57a of the guide groove 57 is an arc-shaped protrusion 46a having a corresponding arc shape. This allows the operating member 41 to move linearly along the guide groove 57. Furthermore, the operating member 41 becomes rotatable when the arc-shaped protrusion 46a abuts against the arc-shaped recess 57a. Furthermore, the shaft 46 is provided with a linear engagement protrusion 46b on the side opposite the arc-shaped protrusion 46a. The guide groove 57 is provided with a linear engagement recess 57b corresponding to the engagement protrusion 46b.

[0036] 〔assembly〕 The buckle 9 configured as described above is assembled as follows. Specifically, the operating member 41 is combined with the cover 51 by engaging the shaft portion 46 with the guide groove 57. At this time, the second biasing member 49 is disposed between the holding portions 48a, 48b. The user operating portion 42 is exposed to the outside through the operation recess 59. The cover 51 is then combined with the pivot support pieces 33 of the locking member 31. The locking member 31 is then disposed in the inner space 24 of the base 21. Thereafter, the support shaft 29 is inserted through the support hole 26, the through-hole 36, and the insertion hole 55. Both ends of the support shaft 29 are supported by the support hole 26. At this time, the support shaft 29 is inserted into the coil portion of the first biasing member 39. In the buckle 9 assembled as described above, the second chin strap 7 is attached to the mounting hole 25 of the base 21. Meanwhile, the first chin strap 6 is attached to the band 8 through the mounting hole 15.

[0037] [Lock operation] As shown in FIGS. 6 and 7, before the band 8 is inserted, the operating member 41 is biased in the counter-first operating direction (counter-arrow D1 direction) by the biasing force of the second biasing member 49. As a result, the shaft portion 46 is positioned (standby position) on the opposite side of the guide groove 57 from the arc-shaped recess 57a (right side in FIGS. 6 and 7). The cam portion 45 of the turning operating portion 43 is retracted from the operated piece 34 of the locking member 31 and is not linked to the operated piece 34. The locking member 31 is biased in the locking direction (arrow D2 direction) by the biasing force of the first biasing member 39. As a result, the locking portion 35 is in contact with the bottom plate 22 of the base 21.

[0038] 8 and 9, the insertion end 16 of the band 8 is inserted into the insertion opening 19 of the buckle 9 (in the direction of arrow D3). The band 8 is then inserted between the bottom plate 22 and the locking plate 32 while sliding against the bottom plate 22. At this time, the locking portions 35 of the band 8, which are biased to rotate in the direction of arrow D2 by the first biasing member 39, move over the claw portions 11 one by one against the biasing force. As the band 8 moves in the insertion direction (in the direction of arrow D3), the locking portions 35 can easily move over the inclined surfaces 13 of the claw portions 11. At this time, the user feels a clicking sensation.

[0039] On the other hand, the band 8 is prevented from moving in the direction opposite to the insertion direction (direction opposite to the arrow D3) by the locking portion 35 being locked by the locking surface 14. Even if the operating member 41 is pushed in the second operating direction (arrow D4 direction) before being operated in the first operating direction (arrow D1 direction), the engaging protrusion 46b of the shaft 46 is engaged with the engaging recess 57b of the guide groove 57. Therefore, movement in the second operating direction (arrow D4 direction) is prevented. This state also means that the cam portion 45 and the operated piece 34 are separated and not linked together. In this way, the locking member 31 is prevented from rotating in the anti-locking direction (anti-arrow D2 direction). This prevents the operating member 41 from being pushed in the first operating direction (arrow D1 direction) and the lock from being released.

[0040] [Unlocking operation] As shown in FIGS. 10 and 11 , to remove the band 8 from the buckle 9, first, the operating member 41, which is in the standby position, is pushed in the first operating direction (the direction of arrow D1). Specifically, the user-operated portion 42 of the operating member 41 is pushed in the first operating direction (the direction of arrow D1) against the biasing force of the second biasing member 49. As a result, the operating member 41, which is in the standby position, moves linearly relative to the cover 51 until the arcuate protrusion 46a of the shaft 46 abuts against the arcuate recess 57a of the guide groove 57. Then, the engaging protrusion 46b disengages from the engaging recess 57b of the guide groove 57. As a result, the operating member 41 moves to an unlockable position where the engagement between the claw portion 11 and the locking portion 35 can be released. Then, the cam portion 45 enters below the operated piece 34 of the locking member 31. In this state, the engagement between the claw portion 11 and the locking portion 35 is still maintained.

[0041] Next, as shown in FIG. 12 , while the operating member 41 is being pressed in the first operating direction (arrow D1 direction), the user further presses the user-operated portion 42 in a second operating direction (arrow D4 direction) that intersects with the first operating direction (arrow D1 direction) and disengages the pawl portion 11 from the locking portion 35. This causes the operating member 41 to rotate around the arcuate protrusion 46a of the shaft 46, and the cam portion 45, located on the opposite side of the shaft 46 from the user-operated portion 42, lifts the locking member 31 through the operated piece 34 against the biasing force of the first biasing member 39. The locking member 31 then rotates around the support shaft 29 in the counter-locking direction (counter-arrow D2 direction). This releases the engagement between the pawl portion 11 and the locking portion 35, resulting in a disengaged state. By maintaining this state, the band 8 can be pulled out of the buckle 9.

[0042] As described above, according to the first embodiment, the following effects can be obtained. (1-1) In the buckle 9, the operating member 41, which is in the standby position, is operated in a first operating direction (arrow D1 direction). As a result, the operating member 41 moves to a disengageable position where the engagement between the claw portion 11 and the locking portion 35 can be released. Next, while the operating member 41 is being pressed in the first operating direction (arrow D1 direction), it is further operated in a second operating direction (arrow D4 direction) that intersects with the first operating direction (arrow D1 direction). This causes the operating member 41 to rotate the locking member 31 in the counter-locking direction (counter-arrow D2 direction). This releases the engagement between the claw portion 11 and the locking portion 35. By maintaining this state, the band 8 can be pulled out of the buckle 9.

[0043] In this way, unlocking the buckle 9 requires operation in two different directions. Because there are multiple operation directions, it is possible to prevent the lock from being unlocked against the user's will. Furthermore, the lock is released by operating the operating member 41 in the first operation direction (arrow D1 direction) and then continuously operating it in the second operation direction (arrow D4 direction). This prevents the operation method for unlocking from becoming complicated.

[0044] Even if the operating member 41 is pushed in the second operating direction (arrow D4 direction) before being operated in the first operating direction (arrow D1 direction), the locking member 31 is prevented from rotating in the anti-locking direction (anti-arrow D2 direction), thereby preventing accidental unlocking.

[0045] (1-2) The cover 51 covers the inner space 24 of the base 21, which can prevent the locking member 31 and the operating member 41 arranged in the inner space 24 from malfunctioning due to contact with foreign objects, etc. The operating member 41 can be operated from the portion of the cover 51 that faces the outside through the operating recess 59.

[0046] (1-3) The insertion opening 19 is defined by the guide recess 58 of the cover 51 and the opening is limited, making it easier to insert the insertion end 16 of the band 8 between the bottom plate 22 of the base 21 and the locking portion 35.

[0047] (1-4) The biasing force of the first biasing member 39 can reliably lock the locking portion 35 onto the claw portion 11 . (1-5) The operating member 41 can be configured to move to the unlockable position only when the user operates it in the first operating direction (the direction of arrow D1) by the biasing force of the second biasing member 49. In other words, the operating member 41 can maintain the standby position unless the user presses it in the direction of arrow D1.

[0048] (1-6) The number of parts can be reduced because the locking member 31 can be directly rotated by operating the operating member 41. For example, the number of parts can be reduced by the amount that the indirect member 61 in the second embodiment described next does not need to be provided.

[0049] Second Embodiment 13 and 14, the buckle 60 of the second embodiment differs from the buckle 9 of the first embodiment in the operation direction of the operation member. In the buckle 9 of the first embodiment, the user operation portion 42 of the operation member 41 is pushed in the direction of arrow D4, whereas in the buckle 60 of the second embodiment, the operation member is pulled up in the direction opposite to arrow D4 (arrow D5 direction).

[0050] Specifically, such a buckle 60 includes a base 21, a locking member 31, an operating member 41, a cover 51, and an indirect member 61. In the buckle 60, the indirect member 61 is an additional member compared to the buckle 9 of the first embodiment. The buckle 60 includes the indirect member 61, so that the operating member 41 indirectly operates the locking member 31.

[0051] The base 21 has shaft holes 63 that support each end of a shaft member 62 for rotatably supporting the intermediate member 61. The locking member 31 uses the same material as in the first embodiment. The cover 51 also uses the same material as in the first embodiment.

[0052] The operating member 41 does not have the rotation operation unit 43 that is included in the operating member 41 of the first embodiment. Instead, the operating member 41 has a linking unit 47 for rotating the indirect member 61. The linking unit 47 is provided on the opposite side of the user operation unit 42. The linking unit 47 is configured with an inclined surface, and when the operating member 41 is pulled up, it presses the indirect member 61 to rotate in the opposite direction.

[0053] The indirect member 61 includes a pressed portion 66 operated by the linking portion 47 of the operating member 41, and a rotation operation portion 67. The pressed portion 66 is a portion that is pressed by the linking portion 47 when the operating member 41 is pulled up. The rotation operation portion 67 extends on the opposite side of the pressed portion 66. The rotation operation portion 67 is composed of two legs. The upper surface of each rotation operation portion 67 includes a cam portion 68. The cam portion 68 fits under the operated piece 34 and lifts the locking member 31 against the biasing force of the first biasing member 39. The indirect member 61 has an insertion hole 69, through which the shaft member 62 is inserted, at a position intermediate between the pressed portion 66 and the rotation operation portion 67.

[0054] 〔assembly〕 The buckle 60 configured as above is assembled as follows. Specifically, the operating member 41 is combined with the cover 51 by engaging the shaft portion 46 with the guide groove 57. At this time, the second biasing member 49 is disposed between the holding portions 48a and 48b. The user operating portion 42 is exposed to the outside through the operation recess 59. The shaft member 62 is inserted into the insertion hole 69 of the intermediate member 61, and both ends of the shaft member 62 are supported in the shaft holes 63.

[0055] The cover 51 is fitted between the pivot support pieces 33 of the locking member 31. The locking member 31 is then placed in the inner space 24 of the base 21. The support shaft 29 is then inserted through the support hole 26, the through-hole 36, and the insertion hole 55. Both ends of the support shaft 29 are supported in the support hole 26. At this time, the support shaft 29 is inserted inside the coil portion of the first biasing member 39. In the indirect member 61, the pressed portion 66 is adjacent to the connecting portion 47 of the operating member 41, and the pivot operating portion 67 is inserted below the operated piece 34. In the buckle 9 assembled as described above, the second chin strap 7 is attached to the mounting hole 25 of the base 21. Meanwhile, the first chin strap 6 is attached to the band 8 through the mounting hole 15.

[0056] [Lock operation] As shown in Figures 15 and 16, before the band 8 is inserted, the operating member 41 is biased in the counter-first operating direction (counter-arrow D1 direction) by the biasing force of the second biasing member 49. As a result, the shaft 46 is positioned in the guide groove 57 on the opposite side from the arcuate recess 57a (right side in Figures 15 and 16) (standby position). The linking portion 47 is retracted by moving away from the pressed portion 66 and is in a non-linked state. The locking member 31 is biased in the locking direction (arrow D2 direction) by the biasing force of the first biasing member 39. As a result, the locking portion 35 contacts the bottom plate 22 of the base 21.

[0057] Then, the insertion end 16 of the band 8 is inserted into the insertion opening 19 of the buckle 9 (in the direction of arrow D3). The band 8 is then inserted between the bottom plate 22 and the locking plate 32 while in contact with the bottom plate 22. At this time, the locking portions 35 of the band 8 are biased to rotate by the first biasing member 39 (in the direction of arrow D2), and push up the claw portions 11 one by one against the biasing force, and move forward. When the band 8 moves in the insertion direction (in the direction of arrow D3), the locking portions 35 can easily ride over the inclined surfaces 13 of the claw portions 11.

[0058] On the other hand, the band 8 is prevented from moving in the direction opposite to the insertion direction (direction opposite to the arrow D3) by the locking portion 35 being locked by the locking surface 14. Even if the operating member 41 is pulled up in the second operating direction (arrow D5 direction) before being operated in the first operating direction (arrow D1 direction), the engaging protrusion 46b of the shaft 46 is engaged with the engaging recess 57b of the guide groove 57. Therefore, movement in the second operating direction (arrow D5 direction) is prevented. This state also means that the linking portion 47 and the pressed portion 66 are separated and not linked together. In this way, the locking member 31 is prevented from rotating in the counter-locking direction (counter-arrow D2 direction). This prevents the operating member 41 from being pressed in the first operating direction (arrow D1 direction) and the lock from being released.

[0059] [Unlocking operation] As shown in FIGS. 17 and 18 , to remove the band 8 from the buckle 9, first, the operating member 41, which is in the standby position, is pushed in the first operating direction (the direction of arrow D1). Specifically, the user-operated portion 42 of the operating member 41 is pushed in the first operating direction (the direction of arrow D1) against the biasing force of the second biasing member 49. This causes the operating member 41, which is in the standby position, to move linearly relative to the cover 51 until the arcuate protrusion 46a of the shaft 46 abuts against the arcuate recess 57a of the guide groove 57. As a result, the operating member 41 moves to an unlockable position where the locked state between the claw portion 11 and the locking portion 35 can be released. Then, the linking portion 47 comes into contact with the pressed portion 66 and enters a linked state. In this state, the locked state between the claw portion 11 and the locking portion 35 is still maintained.

[0060] Next, as shown in FIG. 19 , while the operating member 41 is being pressed in the first operating direction (the direction of arrow D1), the user operates the user-operated portion 42 by further lifting it in a second operating direction (the direction of arrow D5) that intersects with the first operating direction (the direction of arrow D1) and disengages the hook 11 from the locking portion 35. This causes the operating member 41 to rotate about the arcuate protrusion 46a of the shaft 46, and the linking portion 47, located on the opposite side of the shaft 46 from the user-operated portion 42, presses the pressed portion 66 of the indirect member 61. This causes the indirect member 61 to rotate about the shaft 62, and the cam portion 68 of the rotation operating portion 67, located on the opposite side of the pressed portion 66, lifts the locking member 31 through the operated piece 34 against the biasing force of the first biasing member 39. The locking member 31 then rotates about the support shaft 29 in the counter-locking direction (the direction of arrow D2). This releases the engagement between the claw portion 11 and the engagement portion 35. By maintaining this state, the band 8 can be pulled out of the buckle 9.

[0061] As described above, according to the second embodiment, in addition to the same effects as the first embodiment, the following unique effects can be obtained. (2-1) In the buckle 60, the rotation of the locking member 31 when the operating member 41 is pulled up in the second operating direction (arrow D5 direction) can be made to be the counter-locking direction (counter-arrow D2 direction) by interposing the indirect member 61. In the second embodiment, the second operating direction of the operating member 41 can be made to be opposite to the second operating direction of the operating member 41 in the first embodiment.

[0062] [Modification] The first and second embodiments can be modified as follows: The first and second embodiments and the following modifications can be combined and implemented within the scope of technical compatibility.

[0063] In the second embodiment, the indirect member 61 is provided between the locking member 31 and the operating member 41, but an additional indirect member may be provided between the indirect member 61 and the locking member 31. Also, an additional indirect member may be provided between the operating member 41 and the indirect member 61.

[0064] In the first and second embodiments, the second biasing member 49 is not limited to a compression coil spring. The second biasing member 49 may be omitted. In the first and second embodiments, the first biasing member 39 is not limited to a torsion coil spring. Also, the first biasing member 39 may be omitted.

[0065] In the first and second embodiments, the cover 51 may omit the guide recess 58. If a wall portion for forming the guide recess 58 is not provided, the insertion opening 19 for the band 8 will open wide. On the other hand, by making the guide recess 58 smaller, the insertion opening 19 can be made smaller.

[0066] In the first and second embodiments, the cover 51 may be omitted. In this case, the guide groove 57 with which the shaft 46 of the operating member 41 engages is provided in the side plate 23 of the base 21. Also, even if the guide groove 57 is provided in the side plate 23, the cover may be disposed on the base 21.

[0067] The first operation direction (arrow D1 direction) may be a linear movement or a curved movement that bulges upward or downward. The longer the movement amount of the operating member 41 in the first operation direction (arrow D1 direction), the more erroneous operation can be suppressed and the operating force required in the second operation direction can be reduced, improving the operating feel.

[0068] The band 8 may be provided with at least one claw portion 11 that can be engaged with the engaging portion 35 . The helmet may be a motorcycle helmet, a bicycle helmet, a car helmet, a civil engineering helmet, a light work helmet, an electrical work helmet, or the like. [Explanation of symbols]

[0069] 8...Band 9...Buckle 11...Claw part 21...Bass 22…Bottom plate 22a...insertion side end 22b...Mounting end 23...Side panel 24...Inner space 26...Support hole 27... Positioning recess 29…Spindle 31...Locking member 32...Latching plate 34...Operated piece 35...Latching part 39...First biasing member 41...Operating member 42...User operation unit 43...Rotation operation unit 45...Cam section 46...Shaft 46a...Circular protrusion 49...Second biasing member 51...Cover 56... Positioning step 57...Guide groove 57a...Arc recess 58...Guide recess 59...Operation recess

Claims

1. A buckle for fastening a band having a claw portion on one side, a base including a bottom plate and a pair of side plates, the band being inserted into an inner space defined by the bottom plate and the pair of side plates so that the other surface opposite to the one surface is in contact with the bottom plate; a locking member including a locking portion that is locked to the claw portion, the locking member being rotated in a locking direction in which the locking portion is locked to the claw portion of the band inserted between the locking portion and the bottom plate from the insertion direction of the band; an operating member that directly or indirectly rotates the locking member in a counter-locking direction opposite to the locking direction to release the locking state between the claw portion and the locking portion, The operating member is operated in a first operating direction to move from a standby position not linked with the locking member to an unlockable position where the locking member can be linked, and is operated in a second operating direction intersecting the first operating direction to directly or indirectly rotate the locking member in the counter-locking direction, thereby switching the locking member from the locked state to a state in which the claw portion and the locking portion are unlocked. Helmet buckle.

2. a cover disposed on the base and covering the locking member; the operating member includes a user operation portion exposed to the outside through the cover, The operating member is movable relative to the cover in the first operating direction through the user operating portion and is rotatable in the second operating direction. The helmet buckle according to claim 1.

3. The cover and the base define an insertion opening for the band. The helmet buckle according to claim 2.

4. a first biasing member that biases the locking member in a rotational direction of the locking member; The helmet buckle according to claim 1.

5. a second biasing member that biases the operating member in a counter-first operating direction that is opposite to the first operating direction; The helmet buckle according to claim 1.

6. When the operating member is pushed in the second operating direction, the operating member directly rotates the locking member in the counter-locking direction. The helmet buckle according to any one of claims 1 to 5.

7. The locking member is further provided with an indirect member that rotates the locking member in the counter-locking direction when the operating member is pulled up in the second operating direction. The helmet buckle according to any one of claims 1 to 5.

8. A helmet comprising a first chin strap having a band and a second chin strap having a buckle for fastening the band, The band has a claw portion on one surface, The buckle is a base including a bottom plate and a pair of side plates, the band being inserted into an inner space defined by the bottom plate and the pair of side plates so that the other surface opposite to the one surface is in contact with the bottom plate; a locking member including a locking portion that is locked to the claw portion, the locking member being rotated in a locking direction in which the locking portion is locked to the claw portion of the band inserted between the locking portion and the bottom plate from the insertion direction of the band; an operating member that directly or indirectly rotates the locking member in a counter-locking direction opposite to the locking direction to release the locking state between the claw portion and the locking portion, The operating member is operated in a first operating direction to move from a standby position not linked with the locking member to an unlockable position where the locking member can be linked, and is operated in a second operating direction intersecting the first operating direction to directly or indirectly rotate the locking member in the counter-locking direction, thereby switching the locking member from the locked state to a state in which the claw portion and the locking portion are unlocked. helmet.

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