Helmet buckle and helmet

Abstract

Provide a buckle that prevents unlocking against the user's will without overly complicating the operation of removing the band from the buckle. 【Solution means】 It includes a base 21 and a locking portion 35 locked to the claw portion 11. A locking member 31 is rotationally biased in the 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 the insertion direction of the band 8. It also includes an operating member 41 for rotating the locking member 31 in the anti-locking direction to release the locked state between the claw portion 11 and the locking portion 35. The operating member 41 is moved from a standby position not in cooperation with the locking member 31 to a lockable unlocking position in cooperation therewith when operated in the first operating direction, and rotates the locking member 31 in the anti-locking direction when operated in the second operating direction, changing the locking member 31 from the locked state to the unlocked state between the claw portion 11 and the locking portion.

Description

Technical Field

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

Background Art

[0002] Helmets such as those for motorcycles are provided with a pair of left and right chin straps. One of the chin straps is provided with a band having a ratchet, and the other chin strap is provided with a buckle.

[0003] For example, the buckle of Patent Document 1 includes a base unit, a lock unit, and an operation unit. The lock unit is rotatable with respect to the base unit. The operation unit is slidable with respect to the base unit. When the operation unit is slid in one direction, the inclined portion provided at the tip of the operation unit rotates so as to lift the lock unit. As a result, the locking state between the lock unit and the claw portion provided on the band is released. That is, this buckle can remove the band from the buckle by simply performing one operation of sliding the operation unit in one direction by the user.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] From the viewpoint of operability, it is preferable that the band can be removed from the buckle by a simple operation for the buckle used for the chin strap of the helmet. On the other hand, it is not preferable that the lock is released against the will of the user. It is necessary that the buckle can be unlocked by a simple operation when the user has the intention to unlock it.

Means for Solving the Problems

[0006] The buckle for a helmet for solving the above problems is a buckle for fixing a band provided with claw portions on one surface, and includes a bottom plate and a pair of side plates. In an inner space defined by the bottom plate and the pair of side plates, a base into which the band is inserted such that the other surface opposite to the one surface contacts the bottom plate, and a locking portion that is locked to the claw portion are provided. A locking member that is 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, and an operating member that directly or indirectly rotates the locking member in a reverse locking direction opposite to the locking direction to release the locked state between the claw portion and the locking portion are provided. The operating member is moved from a standby position not in cooperation with the locking member to a lock-releasable position capable of cooperation when operated in a first operation direction, and is directly or indirectly rotated in a second operation direction intersecting the first operation direction to rotate the locking member in the reverse locking direction, and the locking member is changed from the locked state to a state where the claw portion and the locking portion are unlocked.

[0007] A helmet for solving the above problems includes a first jaw strap having a band and a second jaw strap having a buckle for fixing the band, wherein the band has claw portions on one surface, the buckle includes a bottom plate and a pair of side plates, and in an inner space defined by the bottom plate and the pair of side plates, a base into which the band is inserted such that the other surface opposite to the one surface contacts the bottom plate, a locking portion that is locked to the claw portions, a locking member that is rotated in a locking direction in which the locking portion is locked to the claw portions 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 an unlocking direction opposite to the locking direction to release the locked state between the claw portions and the locking portion. The operating member is moved from a standby position not in cooperation with the locking member to a lock-releasable position capable of cooperation when operated in a first operating direction, and when operated in a second operating direction intersecting the first operating direction, directly or indirectly rotates the locking member in the unlocking direction to change the locking member from the locked state to a state in which the claw portions and the locking portion are unlocked.

[0008] According to the above configuration, the operating member in the standby position is operated in the first operating direction. As a result, the operating member moves to a lock-releasable position where the locked state between the claw portions and the locking portion can be released. Next, while keeping the operating member pressed in the first operating direction, it is further operated in a second operating direction intersecting the first operating direction. Then, the operating member rotates the locking member in the unlocking direction. Thereby, the locked state between the claw portions and the locking portion is released. By maintaining this state, the band can be pulled out from the buckle. Thus, two-directional operations are required to unlock the buckle. Therefore, it is possible to prevent the unlocking from occurring against the user's will. Also, after operating the operating member in the first operating direction and continuously operating it in the second operating direction, the lock is released. Therefore, the complication of the operating method for unlocking can also be suppressed.

[0009] In the above-mentioned buckle for a helmet and the helmet, a cover that is disposed on the base and covers the locking member is further provided. The operation member includes a user operation part that faces the outside from the cover. The operation member may be configured to be movable in the first operation direction with respect to the cover through the user operation part and to be rotatable in the second operation direction.

[0010] According to the above configuration, since the inner space of the base is covered by the cover, it is possible to make it difficult for the locking member and the operation member disposed in the inner space to malfunction. The operation of the operation member can be performed at a portion that faces the outside from the cover.

[0011] In the above-mentioned buckle for a helmet and the helmet, the cover may be configured to partition the insertion port of the band together with the base. According to the above configuration, since the insertion port is partitioned by the cover and the opening is restricted, it becomes easier to insert the insertion end of the band between the base and the locking part.

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

[0013] In the above-mentioned buckle for a helmet and the helmet, the operation member may be further configured to include a second biasing member that biases the operation member in the anti-first operation direction opposite to the first operation direction. According to the above configuration, the operation member can be configured to move to the unlocking position only when the user operates in the first operation direction by the biasing force of the second biasing member.

[0014] In the above-mentioned buckle for a helmet and the helmet, the operation member may be configured to directly rotate the locking member in the anti-locking direction when pushed in the second operation direction. According to the above configuration, since the locking member can be directly rotated by operating the operation member, an increase in the number of parts can be suppressed.

[0015] In the above buckle for a helmet and the helmet, when the operation member is pulled up in the second operation direction, the locking member may further include an indirect member that rotates in the unlocking direction. According to the above configuration, by interposing the indirect member, the rotation of the locking member when the operation member is pulled up in the second operation direction can be made in the unlocking direction.

Effects of the Invention

[0016] According to the present invention, it is possible to prevent unlocking against the user's will without overly complicating the operation of removing the band from the buckle.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Mode for Carrying Out the Invention

[0018] Referring to FIGS. 1 to 19, a helmet to which the present invention is applied will be described. 〔First Embodiment〕 〔Overall Configuration〕 The helmet 1 shown in FIG. 1 is a helmet such as a motorcycle helmet as an example. The helmet 1 includes a shell 2 having a spherical shape. The shell 2 constitutes the outer shell of the helmet. The shell 2 is a resin member having a hemispherical shape. The shell 2 houses, for example, a shock absorption liner 3 which is an interior member for absorbing shocks. The shell 2 is provided with a vision opening for securing a field of vision. The helmet 1 is provided with a shield which is a colorless and transparent plate member having light transmissivity. The shield opens and closes the vision opening.

[0019] The shell 2 is provided with a mounting opening 4. The mounting opening 4 is formed in the 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 jaw straps 6, 7 are attached to the mounting opening 4. The base ends of the left and right jaw straps 6, 7 are fixed to the shell 2. A band 8 having a ratchet formed at its free end is attached to the free end of one of the first jaw straps 6. A buckle 9 is attached to the free end of the other second jaw strap 7. The pair of left and right jaw straps 6, 7 are connected in series by connecting the band 8 and the buckle 9.

[0020] 〔Band〕 As shown in FIGS. 3 and 4, the jaw straps 6, 7 are belt-like members made of synthetic resin that are flexible in the thickness direction. The band 8 is a sheet metal made of metal such as stainless steel, and its tip end has an arc shape. This arc-shaped portion serves as the insertion end 16 into the buckle 9. The band 8 has a ratchet formed on one side. Specifically, the band 8 is provided with a plurality of claw portions 11 that form the ratchet along the longitudinal direction. The plurality of claw portions 11 are arranged side by side in the longitudinal direction at the central position in the width direction orthogonal to the longitudinal direction, and a recess 12 is provided between the adjacent claw portions 11. Each claw portion has an inclined surface 13 on the tip end 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. On the other side of the band 8 opposite to the side where the ratchet is formed, it is a surface that contacts the bottom plate of the base 21 and is a flat surface. A mounting hole 15 for attaching the first jaw strap 6 is provided at the base end of the band 8. The band 8 functions as an adjuster for adjusting the length of the jaw straps 6, 7 by locking the claw portion 11 at an arbitrary position and the locking portion 35 of the locking member 31.

[0021] 〔Buckle〕 As shown in FIGS. 2 and 3, the helmet buckle 9 includes a base 21, a locking member 31, and an operating member 41. Further, the buckle 9 includes a cover 51.

[0022] 〔Base〕 The base 21 includes a bottom plate 22 and a pair of side plates 23, and an inner space 24 is formed inside. The base 21 is formed by bending sheet metal. The inner space 24 is a space where the locking member 31 and the cover 51 are arranged. Also, in the inner space 24, the portion between the bottom plate 22 and the locking member 31 is where the band 8 is inserted. The inner surface of the bottom plate 22 is formed as a flat surface to facilitate the movement of the band 8. The band 8 is inserted along the bottom plate 22. The insertion-side end portion 22a of the bottom plate 22 has an arc shape. Also, the insertion-side end portion 22a is curved downward so as to be an insertion guide portion. In the bottom plate 22, the mounting-side end portion 22b on the side opposite to the insertion-side end portion 22a is the mounting side of the second jaw string 7. Near the mounting-side end portion 22b of the bottom plate 22, there is a mounting hole 25 for mounting the second jaw string 7.

[0023] The pair of side plates 23 are taller on the insertion-side end portion 22a side than on the mounting-side end portion 22b side. The pair of side plates 23 are provided with support holes 26 near the insertion-side end portion. The pair of support holes 26 support both ends of the support shaft 29 that rotatably supports the locking member 31. Also, the pair of side plates 23 are provided with positioning recesses 27 for attaching the cover 51 on the vertical side edges on the mounting-side end portion 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 34.

[0025] The locking plate 32 is provided with a locking portion 35 that is locked to the locking surface 14 of the claw portion 11 of the band 8 between the pair of rotation support pieces 33. The locking portion 35 is composed of an edge facing the locking surface 14, a stepped portion, etc. In the first embodiment, the locking portion 35 is provided in two rows by the edge of the locking plate 32 and the step formed in the locking plate 32 (see FIG. 9). Of course, the locking portion 35 may be in one row or three or more rows.

[0026] The pair of pivot support pieces 33 are provided with through holes 36 through which the support shaft 29 is inserted. The locking portion 35 is located on the side opposite to the pivot point of the locking member 31. The locking portion 35 approaches and separates from the bottom plate 22 by rotating about the support shaft 29. Further, the pivot support piece 33 is provided with an operated piece 34 bent inward. A part of the operating member 41 enters below the operated piece 34. The locking member 31 is rotated so as to be lifted by the operating member 41 when a part of the operating member 41 enters below the operated piece 34.

[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 disposed 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 with respect to the end of the side wall portion 54 to form an operation recess 59. The operation recess 59 exposes the user operation portion 42 of the operating member 41 to the outside.

[0028] The side wall portion 54 is provided with a positioning step 56 that engages with the positioning recess 27 provided in the pair of side plates 23 of the base 21. The cover 51 is attached to the base 21 when the support shaft 29 is inserted into the insertion hole 55 and the positioning step 56 is engaged with the positioning recess 27. The cover 51 is not a member that rotates, slides, or moves with respect to the base 21, but is a member that is integrally fixed to the base 21.

[0029] The side wall portion 54 is provided with a guide groove 57 that guides the movement of the operating member 41. The guide groove 57 is an elongated through groove extending in a direction parallel to the insertion direction of the band. In the guide groove 57, the end portion on the insertion side of the band 8 is formed as an arc recess 57a to serve as a pivot point portion when pressing the operating member 41 downward.

[0030] As shown in FIG. 5, the support portion 53 is a portion located above the insertion-side end of the bottom plate 22, and includes a guide recess 58 for forming the insertion port 19 of the band 8. By restricting the size of the insertion port 19, the guide recess 58 facilitates the insertion of the insertion end of the band 8 between the bottom plate 22 and the locking plate 32.

[0031] Incidentally, a first biasing member 39 for pivotally biasing the locking portion 35 of the locking member 31 in the direction of the bottom plate 22 is attached to the support shaft 29. 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 coil portion has the support shaft 29 inserted therein. One arm is locked to the back surface of the cover 51. The other arm is locked to the locking plate 32. Thereby, the locking member 31 is pivotally biased in the locking direction (arrow D2 direction) in which the locking portion 35 approaches the bottom plate 22 about the support shaft 29 by the biasing force of the first biasing member 39. That is, due to the biasing force of the first biasing member 39, the locking portion 35 is reliably locked to the claw portion 11 of the band 8.

[0032] 〔Operating member〕 The operating member 41 includes a user operating portion 42 and a rotation operating portion 43. The operating member 41 is a member disposed below the cover 51. The user operating portion 42 is located on the mounting-side end portion side of the bottom plate 22 and faces the outside from the operation recess 59 of the cover 51.

[0033] The rotation operating portion 43 extends to the opposite side of the user operating portion 42. The rotation operating portion 43 is composed of two leg portions and forms a space 44 therebetween. The upper surface of each rotation operating portion 43 is provided with a cam portion 45. The cam portion 45 is formed of an inclined surface that descends toward the tip of the leg portion 44. When the cam portion 45 enters below the operated piece 34, the cam portion 45 lifts the locking member 31 against the biasing force of the first biasing member 39.

[0034] In the space 44, a second biasing member 49 that biases the operation member 41 in the reverse first operation direction (the direction opposite to the arrow D1), which is also the insertion direction of the band 8, is disposed. The second biasing member 49 is, for example, a compression coil spring. 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 constituted by convex portions that fit into the coil.

[0035] The side wall portion of the operation member 41 includes a shaft portion 46. The shaft portion 46 engages the operation member 41 with the guide groove 57 of the cover 51. As a result, the operation member 41, the shaft portion 46 is a horizontally long boss, and the portion facing the arc recess 57a of the guide groove 57 is an arc protrusion 46a having a corresponding arc shape. Thereby, the operation member 41 can move linearly along the guide groove 57. Further, the operation member 41 can rotate when the arc protrusion 46a abuts against the arc recess 57a. Further, the shaft portion 46 includes a linear engagement protrusion 46b on the side opposite to the arc protrusion 46a. The guide groove 57 includes 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 operation 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. Further, the user operation portion 42 faces the outside from the operation recess 59. Then, the cover 51 is combined between the rotation support pieces 33 of the locking member 31. Then, the locking member 31 is 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. And both ends of the support shaft 29 are supported by the support holes 26. At this time, the support shaft 29 is inserted into the coil portion of the first biasing member 39. The buckle 9 assembled as described above has the second jaw string 7 attached to the attachment hole 25 of the base 21. On the other hand, the band 8 has the first jaw string 6 attached to the attachment hole 15.

[0037] [Lock Operation] As shown in FIGS. 6 and 7, before the band 8 is inserted, the operation member 41 is biased in the reverse first operation direction (opposite to the arrow D1 direction) by the biasing force of the second biasing member 49. As a result, the shaft portion 46 is located on the side opposite to the arc-shaped concave portion 57a in the guide groove 57 (the right side in FIGS. 6 and 7) (standby position). And the cam portion 45 of the rotation operation portion 43 has retreated from the operated piece 34 of the locking member 31 and is in a state of not cooperating with 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] And as shown in FIGS. 8 and 9, the band 8 has its insertion end 16 inserted into the insertion port 19 of the buckle 9 (in the direction of arrow D3). And the band 8 is inserted between the bottom plate 22 and the locking plate 32 while being in sliding contact with the bottom plate 22. At this time, the band 8 has the locking portion 35, which is rotationally biased in the direction of arrow D2 by the first biasing member 39, overcoming one by one the claw portions 11 against the biasing force and advancing. The locking portion 35 can easily overcome along the inclined surface 13 of the claw portion 11 when the band 8 moves in the insertion direction (arrow D3 direction). At this time, a click feeling is given to the user.

[0039] On the other hand, the movement of the band 8 in the reverse insertion direction (opposite to the arrow D3 direction) is blocked from moving in the removal direction by the locking portion 35 being locked to the locking surface 14. Even if the operation member 41 is pushed in the second operation direction (arrow D4 direction) before being operated in the first operation direction (arrow D1 direction), the engaging protrusion 46b of the shaft portion 46 is engaged with the engaging concave portion 57b of the guide groove 57. Therefore, the movement in the second operation direction (arrow D4 direction) is blocked. Also, this state is also a state where the cam portion 45 and the operated piece 34 are separated and not cooperating. In this way, the locking member 31 is prevented from rotating in the reverse locking direction (opposite to the arrow D2 direction). Thereby, it is possible to prevent the lock from being released without the operation member 41 being pushed in the first operation direction (arrow D1 direction).

[0040] [Unlock Operation] As shown in FIGS. 10 and 11, to remove the band 8 from the buckle 9, first, the operation member 41 in the standby position is pushed in the first operation direction (the direction of arrow D1). Specifically, the user operation portion 42 in the operation member 41 is pushed in the first operation direction (the direction of arrow D1) against the biasing force of the second biasing member 49. As a result, the operation member 41 in the standby position linearly moves with respect to the cover 51 until the arc protrusion 46a of the shaft portion 46 abuts against the arc 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 operation member 41 moves to a lock release possible position where the locking state between the claw portion 11 and the locking portion 35 can be released. And the cam portion 45 enters below the operated piece 34 of the locking member 31. In this state, the locking state between the claw portion 11 and the locking portion 35 still remains maintained.

[0041] Next, as shown in FIG. 12, while keeping the operation member 41 pushed in the first operation direction (the direction of arrow D1), the user operation portion 42 is further pushed in the second operation direction (the direction of arrow D4) that intersects the first operation direction (the direction of arrow D1) to release the locking state between the claw portion 11 and the locking portion 35. Then, the operation member 41 rotates about the arc protrusion 46a of the shaft portion 46, and the cam portion 45 located on the opposite side across the user operation portion 42 and the shaft portion 46 lifts the locking member 31 through the operated piece 34 against the biasing force of the first biasing member 39. And the locking member 31 rotates in the anti-locking direction (the direction of anti-arrow D2) about the support shaft 29. As a result, the locking state between the claw portion 11 and the locking portion 35 is released to a lock release state. By maintaining this state, the band 8 can be pulled out from the buckle 9.

[0042] As described above, according to the first embodiment, the following effects can be obtained. (1-1) In buckle 9, the operating member 41 in the standby position is operated in the first operating direction (the direction of arrow D1). As a result, the operating member 41 moves to a position where the locking state between the claw portion 11 and the locking portion 35 can be released. Next, while keeping the operating member 41 pushed in the first operating direction (the direction of arrow D1), it is further operated in the second operating direction (the direction of arrow D4) that intersects the first operating direction (the direction of arrow D1). Then, the operating member 41 rotates the locking member 31 in the unlocking direction (the direction opposite to arrow D2). As a result, the locking state between the claw portion 11 and the locking portion 35 is released. By maintaining this state, the band 8 can be pulled out from the buckle 9.

[0043] Thus, to unlock the buckle 9, operations in two different directions are required. Since there are multiple operating directions, it is possible to prevent the buckle from being unlocked against the user's will. Also, after operating the operating member 41 in the first operating direction (the direction of arrow D1), the lock is released by continuously operating it in the second operating direction (the direction of arrow D4). Therefore, it is possible to prevent the complication of the operation method for unlocking.

[0044] Even if the operating member 41 is accidentally pushed in the second operating direction (the direction of arrow D4) before being operated in the first operating direction (the direction of arrow D1), the locking member 31 is prevented from rotating in the unlocking direction (the direction opposite to arrow D2). Therefore, it is possible to prevent accidental unlocking.

[0045] (1-2) Since the inner space 24 of the base 21 is covered by the cover 51, it is possible to suppress the occurrence of malfunction of the locking member 31 and the operating member 41 arranged in the inner space 24 due to foreign objects hitting them or the like. The operation of the operating member 41 can be performed at a portion facing the outside from the operation recess 59 of the cover 51.

[0046] (1-3) The insertion port 19 is partitioned by the guide recess 58 of the cover 51 and the opening is restricted, so that it becomes 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 securely lock the locking portion 35 to the claw portion 11. (1-5) By the biasing force of the second biasing member 49, the operating member 41 can be configured to move to the unlocking position only when the user operates in the first operation direction (the direction of arrow D1). That is, the operating member 41 can maintain the standby position unless the user performs an operation of pushing in the direction of arrow D1.

[0048] (1-6) Since the locking member 31 can be directly rotated by operating the operating member 41, an increase in the number of parts can be suppressed. For example, the number of parts can be reduced because the indirect member 61 in the second embodiment described below does not need to be arranged.

[0049] 〔Second Embodiment〕 As shown in FIGS. 13 and 14, the buckle 60 in the second embodiment is different from the buckle 9 in the first embodiment in the operating direction of the operating member. In the buckle 9 of the first embodiment, the user operating portion 42 of the operating member 41 was pushed in the direction of arrow D4, whereas in the buckle 60 of the second embodiment, the operating member is pulled up in the direction opposite to arrow D4 (the direction of arrow D5).

[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. And the buckle 60 includes the indirect member 61, so that the operating member 41 indirectly operates the locking member 31.

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

[0052] The operating member 41 does not include the rotation operating portion 43 included in the operating member 41 of the first embodiment. Instead, the operating member 41 includes a linking portion 47 for rotationally operating the indirect member 61. The linking portion 47 is provided on the side opposite to the user operating portion 42. The linking portion 47 is composed of an inclined surface, and when the operating member 41 is pulled up, it presses the indirect member 61 so as to rotate in the opposite direction.

[0053] The indirect member 61 includes a pressed portion 66 that is operated by the linking portion 47 of the operating member 41, and a rotation operating 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 operating portion 67 extends to the side opposite to the pressed portion 66. The rotation operating portion 67 is composed of two leg portions. The upper surface of each rotation operating portion 67 includes a cam portion 68. The cam portion 68 enters below the operated piece 34 and lifts the locking member 31 against the biasing force of the first biasing member 39. An insertion hole 69 through which the shaft member 62 is inserted is provided at an intermediate position between the pressed portion 66 and the rotation operating portion 67 of the indirect member 61.

[0054] 〔Assembly〕 The buckle 60 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 and 48b. Also, the user operating portion 42 faces the outside from the operation recess 59. Further, the shaft member 62 is inserted into the insertion hole 69 of the indirect member 61, and both ends of the shaft member 62 are supported by the shaft holes 63.

[0055] The cover 51 is combined between the rotation support pieces 33 of the locking member 31. And the locking member 31 is disposed in the inner space 24 of the base 21. Then, the support shaft 29 is inserted through the support hole 26, the through hole 36, and the insertion hole 55. And both ends of the support shaft 29 are supported by the support holes 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 close to the linking portion 47 of the operating member 41, and the rotation operating portion 67 enters below the operated piece 34. The buckle 9 assembled as described above has the second jaw string 7 attached to the mounting hole 25 of the base 21. On the other hand, the band 8 has the first jaw string 6 attached to the mounting hole 15.

[0056] 〔Locking operation〕 As shown in FIGS. 15 and 16, before the band 8 is inserted, the operating member 41 is biased in the reverse first operation direction (the direction opposite to the arrow D1) by the biasing force of the second biasing member 49. As a result, the shaft portion 46 is located on the side opposite to the arc concave portion 57a (the right side in FIGS. 15 and 16) in the guide groove 57 (standby position). And the linking portion 47 is retracted by being separated 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 is in contact with the bottom plate 22 of the base 21.

[0057] Then, the insertion end 16 of the band 8 is inserted into the insertion port 19 of the buckle 9 (in the direction of arrow D3). And the band 8 is inserted between the bottom plate 22 and the locking plate 32 while contacting the bottom plate 22. At this time, the band 8 is rotationally biased by the first biasing member 39 (in the direction of arrow D2), and the locking portion 35 pushes up and advances each claw portion 11 against the biasing force one by one. The locking portion 35 can easily get over along the inclined surface 13 of the claw portion 11 when the band 8 moves in the insertion direction (arrow D3 direction).

[0058] On the other hand, the movement of the band 8 in the reverse insertion direction (the direction opposite to the arrow D3) is blocked by the locking portion 35 being locked to the locking surface 14, preventing movement in the removal direction. Even if the operation member 41 is pulled up in the second operation direction (arrow D5 direction) before being operated in the first operation direction (arrow D1 direction), the engaging protrusion 46b of the shaft portion 46 is engaged with the engaging recess 57b of the guide groove 57. Therefore, the movement in the second operation direction (arrow D5 direction) is blocked. Also, this state is a state in which the linking portion 47 and the pressed portion 66 are separated and not linked. In this way, the locking member 31 is prevented from rotating in the anti-locking direction (anti-arrow D2 direction). Thereby, it is possible to prevent the operation member 41 from being pushed in the first operation direction (arrow D1 direction) and the lock from being released.

[0059] 〔Unlock operation〕 As shown in FIGS. 17 and 18, to remove the band 8 from the buckle 9, first, the operation member 41 in the standby position is pushed in the first operation direction (arrow D1 direction). Specifically, the user operation portion 42 in the operation member 41 is pushed in the first operation direction (arrow D1 direction) against the biasing force of the second biasing member 49. As a result, the operation member 41 in the standby position linearly moves with respect to the cover 51 until the arc protrusion 46a of the shaft portion 46 abuts against the arc recess 57a of the guide groove 57. As a result, the operation member 41 moves to a lock release possible position where the locked state between the claw portion 11 and the locking portion 35 can be released. And the linking portion 47 comes into contact with and links to the pressed portion 66. In this state, the locked state between the claw portion 11 and the locking portion 35 still remains maintained.

[0060] Next, as shown in FIG. 19, while keeping the operation member 41 pressed in the first operation direction (the direction of arrow D1), the user operation unit 42 is further pulled up in the second operation direction (the direction of arrow D5) that releases the locked state between the claw portion 11 and the locking portion 35 that intersects the first operation direction (the direction of arrow D1). Then, the operation member 41 rotates about the arc-shaped protrusion 46a of the shaft portion 46, and the cooperation portion 47 located on the opposite side across the user operation unit 42 and the shaft portion 46 presses the pressed portion 66 of the intermediate member 61. Then, the intermediate member 61 rotates about the shaft member 62, and the cam portion 68 of the rotation operation 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. Then, the locking member 31 rotates in the anti-locking direction (the direction of anti-arrow D2) about the support shaft 29. Thereby, the locked state between the claw portion 11 and the locking portion 35 is released. By maintaining this state, the band 8 can be pulled out from the buckle 9.

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

[0062] [Modification Example] The first embodiment and the second embodiment can be implemented with the following modifications. The first embodiment, the second embodiment, and the following modification examples can be implemented in combination with each other within a technically non-conflicting range.

[0063] ·In the second embodiment, an intermediate member 61 is provided between the locking member 31 and the operation member 41, but a further intermediate member may be provided between the intermediate member 61 and the locking member 31. Also, a further intermediate member may be provided between the operation member 41 and the intermediate member 61.

[0064] · In the first and second embodiments, the second biasing member 49 is not limited to a compression coil spring. Also, 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 the wall portion for forming the guide recess 58 is not provided, the insertion port 19 of the band 8 will open widely. On the other hand, by making the guide recess 58 smaller, the insertion port 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 portion 46 of the operation member 41 is engaged will be provided on the side plate 23 of the base 21. Also, even when the guide groove 57 is provided on the side plate 23, the cover may be arranged on the base 21.

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

[0068] · It is sufficient that at least one claw portion 11 provided on the band 8 can be locked to the locking portion 35. · As the helmet, in addition to the motorcycle helmet, a bicycle helmet, an automobile helmet, a civil engineering work helmet, a light work helmet, an electrical work helmet, etc. may also be used.

Explanation of Reference Numerals

[0069] 8... Band 9... Buckle 11... Claw Portion 21... Base 22… Bottom plate 22a… Insertion side end 22b… Attachment side end 23… Side plate 24… Inner space 26… Support hole 27… Positioning recess 29… Support shaft 31… Locking member 32… Locking plate 34… Operated piece 35… Locking part 39… First biasing member 41… Operating member 42… User operation part 43… Rotation operation part 45… Cam part 46… Shaft part 46a… Arc 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 fixing 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 such 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; 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 locking state between the claw portion and the locking portion, The operating member is moved from a standby position not linked to the locking member to a lock-disengaging position where the operating member can be linked to the locking member by being operated in a first operating direction, and is also directly or indirectly rotated in the counter locking direction by being operated in a second operating direction intersecting the first operating direction, thereby causing the locking member to move from the locked state to a state where the claw portion and the locking portion are released from the locked state. Helmet buckle.

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

2. 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. The locking member further includes a first biasing member that biases the locking member to rotate in the locking direction.

2. The helmet buckle according to claim 1.

5. The actuator further includes a second biasing member that biases the operating member in a counter-first operating direction that is opposite to the first operating direction.

2. The helmet buckle according to claim 1.

6. The operating member is pressed in the second operating direction to directly rotate the locking member in the counter locking direction.

6. A helmet buckle according to claim 1.

7. The locking member is further provided with an intermediary member that rotates the locking member in the counter locking direction by the operating member being pulled up in the second operating direction.

6. A helmet buckle according to claim 1.

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 such 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; 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 locking state between the claw portion and the locking portion, The operating member is moved from a standby position not linked to the locking member to a lock-disengaging position where the operating member can be linked to the locking member by being operated in a first operating direction, and is also directly or indirectly rotated in the counter locking direction by being operated in a second operating direction intersecting the first operating direction, thereby causing the locking member to move from the locked state to a state where the claw portion and the locking portion are released from the locked state. helmet.

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