JP5582705B2 - helmet - Google Patents

Description

  The present invention relates to a helmet including a helmet body having a front opening and a shield plate detachably attached to the helmet body.

  A helmet worn when a motorcycle is driven includes a shield plate that opens and closes the front opening of the helmet body. It is desirable that the shield plate can be easily replaced without using a tool. The reason for replacing the shield plate is to change the color of the shield plate according to the running condition of the motorcycle (day and night, fine weather, rainy weather, etc.), or to replace the shield plate with a scratched surface with a new one. It is.

Examples of conventional helmets that can easily replace the shield plate include those described in Patent Documents 1 to 3.
The helmet disclosed in Patent Document 1 includes a helmet body having a front opening, a fixed shaft base member attached to the left and right sides of the helmet body, and a rotatable and detachable attachment to the fixed shaft base member. And a shield plate. This shield plate is for opening and closing the front opening.

The fixed shaft base member includes a fixed side engaging portion that constitutes a shaft that rotatably supports the shield plate, and an arcuate engaging portion that supports the shield plate in cooperation with the fixed side engaging portion. Is provided. The arcuate engagement portion is formed to extend in an arcuate shape with the axis as the center.
On the other hand, the shield plate is provided with a movable side engaging portion that engages with the fixed side engaging portion, and an engaging projection that can be engaged with the arcuate engaging portion from the front side of the helmet.

These movable side engaging portions and engaging protrusions are respectively provided on both side portions of the shield plate in the left-right direction.
The fixed-side engaging portion and the movable-side engaging portion are disengaged by opening the shield plate further above the position where the front opening is fully opened and positioning the shield plate at a predetermined attachment / detachment position. It is configured.

In order to attach the shield plate to the helmet body, the procedure described in the following (1) to (5) is performed.
(1) The shield plate is positioned at the attachment / detachment position, and the engagement protrusion located on one side in the left-right direction is engaged with the arcuate engagement portion located on one side in the left-right direction.
(2) The movable side engaging portion located on one side in the left-right direction is inserted into the fixed side engaging portion located on one side in the left-right direction from the side of the helmet.

(3) Engage the engagement protrusion located on the other side in the left-right direction with the arcuate engagement portion located on the other side in the left-right direction.
(4) The movable side engaging portion located on the other side in the left-right direction is inserted into the fixed side engaging portion located on the other side in the left-right direction from the side of the helmet.
(5) Close the shield plate. By closing the shield plate in this manner, the fixed-side engaging portion and the movable-side engaging portion are engaged, and the shield plate can be attached to the fixed shaft base member (helmet body).

  In order to remove the shield plate from the helmet body, the shield plate is opened to the attachment / detachment position to release the engagement between the fixed side engaging portion and the movable side engaging portion. The two movable side engaging portions are pulled away from the fixed side engaging portion to the side of the helmet. Then, the shield plate can be removed from the helmet body by moving the shield plate to the front of the helmet relative to the helmet body and releasing the engagement between the pair of left and right engaging projections and the arcuate engagement portion.

The helmet described in Patent Document 2 and Patent Document 3 includes a helmet body, a fixed shaft base member, and a shield plate, similarly to the helmet shown in Patent Document 1. The fixed-side engaging portion of the fixed shaft base member shown in Patent Documents 2 and 3 is provided with a sliding claw piece and a small protrusion.
The claw piece is configured to move in a direction in which the engagement is released against the elastic force of the compression coil spring when the movable side engaging portion on the shield plate side is pressed from the outside of the helmet. .

The nail piece is provided with a finger hooking projection so that it can be artificially slid in a direction in which the engagement with the movable engagement portion is released.
In the helmets described in Patent Documents 2 and 3, in order to attach the shield plate to the helmet body, the movable side engaging portion is pressed against the fixed side engaging portion from the outside of the helmet with the shield plate positioned at a predetermined attachment / detachment position. By doing.

By this pressing, the claw piece slides against the elastic force of the compression coil spring, and the movable side engaging portion that interferes with the small protrusion is deformed to engage with the fixed side engaging portion, so that the shield plate It is attached to the fixed shaft base member (helmet body).
On the other hand, in order to remove the shield plate from the helmet body, the claw pieces are artificially slid in the direction in which the engagement is released while the shield plate is positioned at the attachment / detachment position, and the movable side engaging portion is a small protrusion. Forcibly by pulling to the side of the helmet while deforming both sides of the shield plate while engaged.

JP 2007-92244 A Japanese Patent Publication No. 7-35601 Japanese Patent Publication No. 6-47762

  In the helmet described in Patent Document 1, there is a problem that the work for attaching the shield plate is complicated. This is because the position when the shield plate is attached to the helmet body and the position when the shield plate is removed from the helmet body are the same position.

  That is, when the shield plate of the helmet described in Patent Document 1 is attached to the helmet, one of the engaging projections in the left-right direction of the shield plate and the movable side engaging portion are temporarily engaged with the movable side engaging portion. This is because it is necessary to engage the other engaging protrusion and the movable side engaging portion with the fixed shaft base member with the other hand while holding it with one hand so that it does not come off.

Such inconvenience is eliminated by adopting a configuration in which the movable side engaging portion is pressed against the fixed side engaging portion so as to be engaged with each other as disclosed in Patent Documents 2 and 3. be able to.
However, in the helmets shown in Patent Documents 2 and 3, when removing the shield plate from the helmet body, the claw pieces must be slid in the direction in which the engagement is released, and the engagement between the movable side engaging portion and the small protrusions is required. In order to release the joint, both ends of the shield plate must be deformed. For this reason, when this structure is adopted, the shield plate cannot be easily removed from the helmet body.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a helmet capable of easily attaching and detaching a shield plate.

In order to achieve this object, the helmet of the invention described in claim 1 includes a helmet body having a front opening, a fixed shaft base member for supporting a shield plate fixed to both left and right sides of the helmet body, A helmet including a shield plate rotatably and detachably supported on the fixed shaft base member via an engagement portion, wherein the engagement portion is a fully open position where the front opening is fully opened. And the fully closed position where the front opening is fully closed is engaged, and the shield plate is non-rotated when rotated outside the normal range. A plurality of engaging pieces that are engaged, and a part of the engaging pieces is fixed to a fixed shaft by positioning the shield plate at a predetermined attachment position in the normal range when attaching the shield plate to the helmet body. Helmet outside on base Formed by claws which moves in the direction in which the engagement by the elastic is released by pressing al, and the attachment position of the shield plate when attached to the helmet body, different position of the shield plate is when detached from the helmet body It is what.

  According to a second aspect of the present invention, in the helmet according to the first aspect, the position of the shield plate at which the engaging portion is disengaged is a position where the shield plate is opened from the fully open position. .

According to a third aspect of the present invention, in the helmet according to the first or second aspect, the engaging portion is a fixed-side engaging portion and a shield of a fixed shaft base member located at the rotating shaft portion of the shield plate. A movable-side engaging portion of the plate, an arc-shaped engaging portion of the fixed shaft base member extending in an arc shape at a position separated from the rotating shaft portion, and an engaging protrusion of the shield plate engaged with the fixed-shaft base member The claw piece is provided at the fixed side engaging portion .
According to a fourth aspect of the present invention, in the helmet according to the first or second aspect, the engaging portion includes a fixed-side engaging portion and a shield of the fixed shaft base member located at the rotating shaft portion of the shield plate. A movable-side engaging portion of the plate, an arc-shaped engaging portion of the fixed shaft base member extending in an arc shape at a position separated from the rotating shaft portion, and an engaging protrusion of the shield plate engaged with the fixed-shaft base member The claw piece is provided in the arcuate engagement portion.

According to a fifth aspect of the present invention, in the helmet according to the third or fourth aspect , the claw piece is a slider that is movably supported by the fixed shaft base member, and the slider and the fixed shaft base member. And a shock-absorbing material partly in contact with the spring member .

The invention described in claim 6 is the helmet described in claim 3 or 4 , wherein the claw piece is integrally formed with the fixed shaft base member by integral molding.

According to a seventh aspect of the present invention, in the helmet according to any one of the third to sixth aspects, the shield plate is a part of the arcuate engagement portion, and the shield plate is the fixed side engagement. In a portion corresponding to the engagement protrusion in a state where the engagement between the engagement portion and the movable engagement portion is released, a first notch portion into which the engagement protrusion can be inserted is provided. It is provided.

The invention transferred to claim 8 is the helmet according to any one of claims 3 to 7 , wherein a part of the arcuate engaging portion is engaged with the engaging protrusion. A second cutout portion to be released is formed.

According to the present invention, by positioning the shield plate at the mounting position and pressing the shield plate against the fixed shaft base member, the claw piece moves in a direction in which the engagement is released against the elasticity, and the engaging portion is in the engaged state. become. That is, the shield plate can be attached to the helmet body by an operation of pressing the shield plate against the fixed side engaging portion.
In order to remove the rotating shaft portion of the shield plate from the helmet body, the shield plate is rotated outside the normal range to disengage the engaging portion, and in this state, both sides of the shield plate are moved to the side. Do by pulling towards.

That is, this helmet has a structure that is easy to attach at the position when the shield plate is attached to the helmet body because the position when the shield plate is attached to the helmet body is different from the position when it is removed from the helmet body. It is possible to adopt a structure that can be easily removed at the position when the shield plate is removed from the helmet body.
As a result, according to the present invention, it is possible to provide a helmet in which the shield plate can be easily attached and detached.

It is a side view of the helmet concerning the present invention. It is a side view of a fixed shaft base member. It is the side view seen from the helmet body side of the fixed axis base member. FIG. 2A is a cross-sectional view taken along line AA in FIG. 2, FIG. 2B is a cross-sectional view taken along line BB in FIG. 2, and FIG. CC sectional drawing, the figure (D) is the DD sectional view taken on the line in FIG. It is a side view which shows the state which assembled | attached the slider of the fixed shaft base member. It is the VI-VI sectional view taken on the line in FIG. FIG. 4A is a plan view, FIG. 4B is a side view, and FIG. 4C is a cross-sectional view taken along line CC in FIG. It is a perspective view of a fixed shaft base member. In FIG. 8, the opening formed in the plate-like portion of the fixed shaft base member at the time of molding is omitted. It is a figure which shows a part of shield board, The figure (A) is the perspective view seen from the helmet body side, The figure (B) is a side view. It is the XX sectional view taken on the line in FIG. It is the XI-XI sectional view taken on the line in FIG. 9 (B). It is a side view of the fixed shaft base member for demonstrating the position of the latching piece and engaging protrusion when a shield board is located in an attachment position. FIG. 12 is a cross-sectional view taken along line AA in FIG. 12, in which FIG. 12A shows a state in which the engaging protrusion is inserted into the arcuate engaging portion, and FIG. 12B shows a state in which the slider is moving. FIG. 5C shows a state where the shield plate is attached to the fixed shaft base member. FIG. 12B is a cross-sectional view taken along the line BB in FIG. 12. FIG. 12A shows a state where the engaging protrusion is in contact with the stopper, and FIG. 12B shows a state when the engaging protrusion gets over the stopper. It is a side view of the fixed shaft base member for demonstrating the position of the latching piece and engaging protrusion when a shield board is located in a fully closed position. It is a side view of the fixed shaft base member for demonstrating the position of the latching piece and engaging protrusion when a shield board is located in a removal position. FIG. 16 is a cross-sectional view taken along line XVII-XVII in FIG. 16, in which FIG. 16A shows a state when the detachment operation is started, and FIG. 16B shows a state where the movable side engaging portion is pulled out from the fixed side engaging portion. FIG. 3C shows a state where the engagement between the engagement protrusion and the arcuate engagement portion is released. It is a side view of the fixed axis | shaft base member which shows the other Example which forms a notch in a circular arc-shaped engaging part. It is a side view of the fixed axis | shaft base member which shows the other Example which forms a notch in a circular arc-shaped engaging part. It is a side view of the fixed axis | shaft base member which shows the other Example which forms a notch in a circular arc-shaped engaging part. It is a side view of the fixed axis | shaft base member which shows the other Example which forms a notch in a circular arc-shaped engaging part. It is a side view of a fixed axis base member for explaining other examples of a fixed side engaging part. It is the sectional view on the AA line in FIG.

Hereinafter, an embodiment of a helmet according to the present invention will be described in detail with reference to FIGS.
A helmet 1 shown in FIG. 1 is worn by a passenger such as a motorcycle (not shown), and includes a shield plate 4 for opening and closing the front opening 3 of the helmet body 2. The shield plate 4 is formed in a predetermined shape by a transparent synthetic resin material, and is attached to a fixed shaft base member 5 provided in the helmet body 2 so as to be rotatable and detachable. In addition to forming the shield plate 4 colorless and transparent, the shield plate 4 can be colored and semi-transparent.

  As shown in FIG. 1, the shield plate 4 according to this embodiment has a normal range A between a fully closed position P1 where the front opening 3 is fully closed and a fully open position P2 where the front opening 3 is fully open. Used as. The shield plate 4 is attached to the helmet body 2 at the fully opened position P2, and is removed from the helmet body 2 in a state of being moved to the removal position P3 opened from the fully opened position P2.

The fixed shaft base member 5 is provided on each side of the helmet body 2 in the left-right direction, and the shield plate 4 is formed by a fixed-side engaging portion 11 (see FIG. 2) and an arc-shaped engaging portion 12 which will be described later. Both ends are supported so as to be rotatable and detachable.
The fixed shaft base member 5 is formed into a predetermined shape by a plastic material, and is fixed to the helmet body 2 by two fixing bolts 13 and 14 (see FIG. 1).

  As shown in FIGS. 2, 5, and 8, the fixed shaft base member 5 according to this embodiment includes a plate-like portion 15 formed so as to be able to overlap the outer surface of the helmet body 2, and the plate-like portion. 15, a fixed side engaging portion 11 and an arcuate engaging portion 12 provided on the opposite side of the helmet body 2.

  Two circular holes 16 and 17 through which the fixing bolts 13 and 14 are passed are formed in the plate-like portion 15. The helmet 1 according to this embodiment is configured such that the center C of the circular hole 16 located on the upper side of the two circular holes 16 and 17 becomes the rotation center of the shield plate 4.

The fixed side engaging portion 11 is provided in the vicinity of the periphery of the circular hole 16 located on the upper side. Specifically, as shown in FIGS. 2, 5, and 8, the fixed-side engaging portion 11 includes a protruding wall 21 integrally formed with the plate-like portion 15 so as to surround the circular hole 16, and the protruding portion. The slider 22 is connected to the wall 21 and a compression coil spring 23 that urges the slider 22 toward the inside of the circular hole 16. The slider 22 and the compression coil spring 23 constitute a claw piece 24 in the present invention, and the compression coil spring 23 constitutes a spring member in the invention of claim 5 .

  As shown in FIG. 2, the protruding wall 21 includes a bearing portion 21 a formed in a substantially cylindrical shape located on the same axis as the circular hole 16, and an obliquely front lower portion of the helmet 1 from the lower end portion of the bearing portion 21 a. It is comprised by the 1st, 2nd guide parts 21d and 21f connected to the arc-shaped engagement part 12 mentioned later, and the 1st, 2nd guide parts 21b and 21c extended toward.

A shaft hole 25 is formed in the bearing portion 21a in a C-shaped shape in a side view shown in FIG.
As shown in FIG. 4B, first and second locking pieces 26 and 27 extending inside the bearing portion 21a (inside the shaft hole 25) are provided at the protruding end portion of the bearing portion 21a. Is provided. As shown in FIG. 2, the first and second locking pieces 26 and 27 are positioned at positions facing each other across the center C. In the side view shown in FIG. It is formed in an arc shape extending in the circumferential direction by a predetermined length as a center.

  The first locking piece 26 is formed diagonally forward and upward of the helmet 1 from the center C, and the second locking piece 27 is formed diagonally rearward and downward of the helmet 1 from the center C. As shown in FIG. 4B, the tip portions of the first and second locking pieces 26 and 27 (portions facing the shaft hole 25) that are directed to the side of the helmet 1 are shown. In addition, an inclined surface 28 is formed. The inclined surface 28 is formed so that the thicknesses of the first and second locking pieces 26 and 27 gradually decrease toward the center C.

  A mold (not shown) for molding the fixed shaft base member 5 according to this embodiment has a structure in which the mold is clamped in a direction perpendicular to the paper surface of FIG. Of these molds, the mold for molding the inner surfaces of the first and second locking pieces 26 and 27 (surfaces facing the helmet body 2 side) penetrates the plate-like portion 15. For this reason, as shown in FIG. 3, a hole 29 for inserting a mold is formed in the plate-like portion 15.

  This kind of hole 29 is similarly formed at a position corresponding to the first and second guide portions 21b and 21c of the protruding wall 21 and a position corresponding to an arcuate engagement portion 12 described later. The plate-like portion 15 has a hole 30 for avoiding interference with the compression coil spring 23 in addition to the die insertion hole 29, and a hole for giving the arcuate engagement portion 12 predetermined elasticity. 31 is formed.

  A portion extending downward from the first locking piece 26 in the bearing portion 21a, a first guide portion 21b located on the front side of the helmet 1 out of the pair of guide portions 21b and 21c, and a connection at three locations Among the portions 21d to 21f, the second connecting portion 21e located at the center has a relatively short (low) dimension protruding laterally from the plate-like portion 15 as shown in FIGS. ). That is, a relatively low stepped portion 32 is formed on the projecting wall 21 on the obliquely lower front side of the shaft hole 25.

  As shown in FIGS. 5 and 6, the slider 22 is inserted between the first and second guide portions 21b and 21c, and is movably supported by the guide portions 21b and 21c. . The slider 22 according to this embodiment is inserted into a concave portion 33 formed between the pair of guide portions 21 b and 21 c in the plate-like portion 15 and is held movably in the concave portion 33. The direction in which the slider 22 moves is a direction in which the guide portions 21b and 21c extend, and is a direction substantially orthogonal to the axial direction of the circular hole 16 and the shaft hole 25.

  As shown in FIG. 7, a circular convex portion 34 is formed at one end portion of the slider 22 that faces an arcuate engagement portion 12 described later, and in the center portion in the width direction. The circular convex portion 34 is formed to have a size to which one end portion of the compression coil spring 23 is fitted. As shown in FIGS. 5 and 13, the other end of the compression coil spring 23 is fitted into a circular convex portion 35 protruding from an arcuate engagement portion 12 described later.

  The compression coil spring 23 is elastically mounted between the slider 22 and the arcuate engagement portion 12, and biases the slider 22 toward the shaft hole 25 (upward in FIG. 5). The slider 22 is held between the guide members 21b and 21c in a state in which one end portion located on the shaft hole 25 side is in contact with the end surface 33a of the concave portion 33 (see FIGS. 4A and 13).

Further, the end of the slider 22 opposite to the circular convex portion 34 is formed in an arc shape so as to constitute a part of the hole wall surface of the shaft hole 25.
Further, one side portion {the left end portion in FIG. 7A) held by the first guide portion 21b of the slider 22 is the stepped portion 32 as shown in FIGS. 6 and 7B. It is formed thinner than other parts so as to have the same thickness.

  As shown in FIG. 5 and FIG. 7 (A), the slider 22 is a portion formed so as to have a relatively large thickness. The three locking pieces 36 project so as to face the shaft hole 25. As shown in FIG. 5, the third locking piece 36 has an arc shape (an arc shape centered on the center C) along the hole wall surface of the shaft hole 25, and the slider 22 has a compression coil spring 23. It is formed so as to be aligned with the second locking piece 27 in a state in which it is pressed against the end surface of the recess 33 by the elastic force (a state held between the guide portions 21b and 21c).

  Further, an inclined surface 37 is formed at the tip of the third locking piece 36 as shown in FIG. The inclined surface 37 is formed by inclining the side surface of the third locking piece 36 that faces the side of the helmet 1. The inclined surface 37 is formed such that the thickness of the third locking piece 36 gradually decreases toward the center C.

  The arcuate engagement portion 12 of the fixed shaft base member 5 is for restricting the shield plate 4 from opening and closing unnecessarily, and for determining the attachment position and the removal position of the shield plate 4. As shown in FIGS. 2, 5, and 8, the arcuate engagement portion 12 includes a projecting wall 42 for forming an arcuate guide groove 41 centered on the center C, and The locking piece 43 is integrally formed so as to face into the guide groove 41, and a stopper 44 provided at the upper part in the guide groove 41.

  As shown in FIG. 4A, the protruding wall 42 is formed to have the same height as the protruding wall 21 of the fixed side engaging portion 11. Are connected via the connecting portions 21d to 21f. The guide groove 41 is formed to open toward the side of the helmet 1 and to extend in an arc shape from the upper end portion to the lower end portion of the plate-like portion 15.

  As shown in FIG. 2, a lateral groove 45 extending obliquely forward and downward from the helmet 1 is integrally formed on the upper part of the guide groove 41. The horizontal groove 45 is formed by a pair of vertical walls 45 a and 45 b connected to the protruding wall 42 that forms the guide groove 41. Further, the lateral groove 45 extends along a virtual line (not shown) extending obliquely forward and downward from the center C through the step portion 32, and directed from the front end edge of the fixed shaft base member 5 to the front downward direction. It is formed to be opened. In the upper end portion of the guide groove 41 according to this embodiment, a wide portion 41a having a wider groove width than other portions is formed.

  The locking piece 43 of the arcuate engagement portion 12 is formed in an arc shape substantially along the guide groove 41 from the upper end portion to the lower end portion of the guide groove 41. A plurality of concave portions 46 to 49 are formed at the radially outer end portion of the arcuate locking piece 43. Of these recesses 46 to 49, the first recess 46 located at the top in FIG. 2 is formed at a position corresponding to the wide portion 41a. The first recess 46 is formed such that the width of the locking piece 43 (the width in the left-right direction in FIG. 2 and the width in the front-rear direction of the helmet 1) is reduced by a predetermined dimension.

  Of the four concave portions 46 to 49, the second concave portion 47 located second from the top is formed at a position corresponding to the lateral groove 45. This 2nd recessed part 47 is for hold | maintaining the shield plate 4 mentioned later in the fully open position P2. Of the recesses 46 to 49, the third recess 48 located third from the top is for holding the shield plate 4 in a slightly open position, and the fourth recess 49 located at the bottom. Is for holding the shield plate 4 in the fully closed position P1. The 2nd-4th recessed parts 47-49 are formed in the shape which the said edge part of the latching piece 43 was dented in circular arc shape.

  The stopper 44 is for stopping the shield plate 4 at the fully open position P2, and is provided between a portion of the guide groove 41 to which the lateral groove 45 is connected and the wide portion 41a. As shown in FIG. 4D, the stopper 44 protrudes from the bottom so that the bottom of the guide groove 41 is partially raised. The stopper 44 is formed with a regulation surface 44 a that is continuous with one vertical wall 45 a of the horizontal groove 45 and an inclined surface 44 b that is connected to the wide portion 41 a of the guide groove 41. The regulation surface 44a is formed so as to stand from the bottom of the guide groove 41 toward the opening side of the guide groove 41 (side of the helmet 1). The inclined surface 44b is formed such that the height of the stopper 44 gradually decreases toward the wide portion 41a.

  The shield plate 4 is formed so as to extend from one side of the helmet body 2 in the left-right direction to the other side. As shown in FIG. 9, a movable side engaging portion 51 and an engaging protrusion 52 to be described later are respectively provided at both ends of the shield plate 4 in the left-right direction and facing the helmet body 2. ing. The movable side engaging portion 51 and the engaging protrusion 52 are integrally formed on the plate-like main body 4a of the shield plate 4 by integral molding. In this embodiment, the movable side engaging portion 51, the engaging protrusion 52, and the fixed side engaging portion 11 and the arcuate engaging portion 12 of the fixed shaft base member 5 form an engaging portion according to the present invention. It is configured.

The shield plate 4 engages the movable side engaging portion 51 with the fixed side engaging portion 11 of the fixed shaft base member 5, and engages the engaging protrusion 52 with the arcuate engaging portion 12 of the fixed shaft base member 5. By being combined, the fixed shaft base member 5 is configured to be rotatably supported.
As shown in FIGS. 9A, 10, and 11, the movable side engaging portion 51 includes a cylinder 53 that protrudes from the plate-like body 4 a of the shield plate 4 toward the inside of the shield plate 4, and the cylinder 53. The upper locking piece 54 and the lower locking piece 55 project outward from the distal end portion in the radial direction.

The outer diameter of the cylinder 53 is formed such that it can be fitted inside the first to third locking pieces 26, 27, 36 in the radial direction. The length of the cylinder 53 in the axial direction is formed to be slightly longer than the height of the protruding wall 21 of the fixed side engaging portion 11.
The upper locking piece 54 and the lower locking piece 55 have an arc shape extending in the circumferential direction by a predetermined length around the axis of the cylinder 53 and slide on the hole wall surface of the shaft hole 25. It is formed in a shape that can be freely fitted.

  As shown in FIG. 16, the circumferential length of the upper locking piece 54 is within the upper sector space S <b> 1 formed on the rear side of the helmet 1 with respect to the first locking piece 26 of the fixed side engaging portion 11. It is formed in the dimension which can be inserted in. As described above, the lower locking piece 55 is connected to the first locking piece 26 and the third engagement of the fixed engagement portion 11 in a state where the upper locking piece 54 is inserted into the upper fan-shaped space S1. It is formed so that it can be inserted into the lower fan-shaped space S <b> 2 formed between the stop piece 36.

Further, the thickness of the upper locking piece 54 and the lower locking piece 55 is between the first to third locking pieces 26, 27, 36 of the fixed side engaging portion 11 and the plate-like portion 15. It is dimensioned so that it can be inserted.
9A and 9B is a radial outer edge portion of the upper locking piece 54 and the lower locking piece 55 of the shield plate 4 on the opposite side of the shield body 4 from the plate-like main body 4a. As shown in A), an inclined surface 56 is formed. The inclined surface 56 is formed such that the thickness of the upper and lower locking pieces 54 and 55 gradually decreases as it goes outward in the radial direction. Note that the inclined surface 56 and the inclined surfaces 28 and 37 formed on the first to third locking pieces 26, 27 and 36 of the fixed side engaging portion 11 are not only formed on a flat surface but also a cross-sectional circle. It can also be formed in an arc shape.

As shown in FIGS. 9A and 10, the engagement protrusion 52 of the shield plate 4 includes a columnar portion 52 a that protrudes from the plate-like main body 4 a of the shield plate 4 toward the inside of the shield plate 4, and this columnar shape. The engaging piece 52b protrudes from the tip of the portion 52a toward the movable side engaging portion 51. The height of the columnar part 52 a is formed to be substantially the same as the height of the cylinder 53, and the outer diameter of the columnar part 52 a is first to first provided on the locking piece 43 of the arcuate engagement part 12. It is formed in a dimension that can be inserted into the fourth recesses 46 to 49.
As shown in FIG. 16, the positions where the engaging protrusions 52 are formed are such that the upper locking piece 54 and the lower locking piece 55 of the movable side engaging portion 51 are formed in the upper fan-shaped space S1 and the lower fan-shaped space. The position is such that it is inserted into the wide portion 41a of the guide groove 41 in the state of being inserted into the space S2. In this embodiment, the first to third locking pieces 26, 27, and 36 of the fixed side engaging portion 11, the locking pieces 43 of the arcuate engaging portion 12, and the upper side engaging of the movable side engaging portion 51. The stop piece 54, the lower side lock piece 55, and the lock piece 52b of the engagement protrusion 52 constitute a lock piece in the present invention.

  In the helmet 1 configured as described above, the shield plate 4 is attached to the helmet body 2 by connecting the movable side engaging portion 51 and the engagement protrusion 52 located on one side of the shield plate 4 in the left-right direction of the helmet body 2. The fixed shaft base member 5 located on the same one side is engaged, and then the movable side engaging part 51 and the engaging protrusion 52 located on the other side in the left-right direction are fixed on the other side part of the helmet body 2. This is performed by engaging with the shaft base member 5. Here, the procedure for attaching the shield plate 4 to the helmet body 2 will be described with reference to FIGS.

  In order to attach the shield plate 4 to the helmet body 2, first, as shown in FIG. 12, an engagement protrusion 52 (on the left side in FIG. 12) The projection 52 is inserted into the transverse groove 45 of the arcuate engagement portion 12 from the front of the helmet 1. Then, the shield plate 4 is moved rearward so that the engagement protrusion 52 moves rearward in the lateral groove 45, and the engagement protrusion 52 is advanced into the guide groove 41 of the arcuate engagement portion 12. Thus, when the engaging protrusion 52 enters the guide groove 41, the engaging piece 52 b of the engaging protrusion 52 is inserted inside the engaging piece 43 of the arcuate engaging portion 12. At this time, the columnar portion 52 a of the engaging protrusion 52 is inserted into the second recess 47 formed in the locking piece 43.

  Next, as shown in FIG. 13A, the end of the shield plate 4 in the left-right direction is brought close to the helmet body 2 so that the movable side engaging portion 51 is moved to the fixed side engaging portion 11 from the side of the helmet 1. Overlapping. At this time, as shown in FIG. 12, the upper side locking piece 54 of the movable side engaging portion 51 faces the upper sector space S1 of the fixed side engaging portion 11, and the lower side locking piece 55 is lower fan-shaped. It faces the space S2 and the third locking piece 36. Therefore, at this time, the lower locking piece 55 of the movable side engaging portion 51 is pressed against the third locking piece 36.

  Thereafter, the shield plate 4 is further pressed to the helmet body 2 side while the lower locking piece 55 is in contact with the third locking piece 36. When the shield plate 4 is pressed in this manner, the inclined surface 56 formed at the tip of the lower locking piece 55 is inclined by the third locking piece 36 as shown in FIG. The surface 37 will be pushed. As a result, the slider 22 having the third locking piece 36 moves away from the lower locking piece 55 against the elastic force of the compression coil spring 23 as shown in FIG. It moves in the direction in which the engagement between the stop pieces is released, and the direction in which the first and second guide portions 21b and 21c extend). In other words, the claw piece 24 moves in a direction in which engagement is released against elasticity.

  When the shield plate 4 is further pressed and the lower locking piece 55 moves to the plate-like portion 15 side beyond the third locking piece 36, the slider 22 is moved to the initial position by the elastic force of the compression coil spring 23. After returning, as shown in FIG. 13C, the third locking piece 36 enters the inside of the lower locking piece 55. In this way, by inserting the third locking piece 36 inside the lower locking piece 55 of the movable side engaging part 51, the movable side engaging part 51 engages with the fixed side engaging part 11. It will be.

  One side portion of the shield plate 4 is supported by the helmet body 2 when the movable side engaging portion 51 and the fixed side engaging portion 11 are engaged as described above. After supporting one side of the shield plate 4 on the helmet body 2 in this manner, the other side of the shield plate 4 is supported on the helmet body 2 by the same procedure as described above, whereby the helmet body 2 of the shield plate 4 is moved to the helmet body 2. The installation work is completed.

  Therefore, according to the helmet 1 according to this embodiment, the shield plate 4 is attached to the helmet body 2 by pressing the movable side engaging portion 51 of the shield plate 4 against the fixed side engaging portion 11 of the fixed shaft base member 5. Can do. This attachment operation can be easily performed as compared with a conventional helmet that requires one side to operate the other side with the other hand while supporting one side of the helmet with one hand.

  The shield plate 4 is normally used so that the above-described mounting position is the fully open position P2. The shield plate 4 is rotated (opened / closed) around the cylinder 53 of the movable side engaging portion 51 by being pushed downward or upward after being attached to the helmet body 2. When the shield plate 4 rotates, the upper locking piece 54 and the lower locking piece 55 of the movable side engaging portion 51 move along the hole wall surface of the shaft hole 25 of the fixed side engaging portion 11. The engagement protrusion 52 of the shield plate 4 moves in the vertical direction in the guide groove 41 of the arcuate engagement portion 12.

  The columnar portion 52a of the engaging projection 52 is formed at a position where the shield plate 4 enters the second recess 47 in a state where the shield plate 4 is in the attachment position (fully opened position P2). When moved downward or upward from the mounting position, the arcuate engagement portion 12 is pressed against the outer peripheral end surface of the locking piece 43. For this reason, when the shield plate 4 is opened and closed, resistance due to friction between the columnar portion 52 a and the locking piece 43 is given.

  The engaging protrusion 52 when moving in the vertical direction in the guide groove 41 has the engaging piece 52b inserted inside the engaging piece 43 of the arcuate engaging portion 12 and the columnar portion 52a. It is held in the guide groove 41 by being sandwiched between the stop piece 43 and the projecting wall 42 (see FIG. 12) on the helmet front side of the guide groove 41.

  As shown in FIG. 15, the shield plate 4 moves to the lowermost part of the guide groove 41 and the columnar part 52 a is inserted into the fourth recess 49 of the locking piece 43, so that It is held at the closed position P1. The upper locking piece 54 and the lower locking piece 55 of the movable side engaging portion 51 are shown in FIG. 12 by moving the shield plate 4 from the mounting position (fully opened position P2) to the fully closed position P1. From the position, it rotates counterclockwise in the figure and moves to the position shown in FIG.

When the shield plate 4 is in the fully open position P2, the upper locking piece 54 of the movable side engaging portion 51 is in a state of being disengaged, and when the shield plate 4 is closed from the fully open position P2, the fixed side engagement is achieved. It is inserted into the inside of the first locking piece 26 of the joint portion 11 and becomes engaged.
Further, the lower locking piece 55 of the movable side engaging portion 51 is in a state of being engaged with the third locking piece 36 of the fixed side engaging portion 11 when the shield plate 4 is in the fully open position P2. When the shield plate 4 is closed, as shown in FIG. 15, not only the third locking piece 36 but also the second locking piece 27 is engaged. Thus, the upper side locking piece 54 and the lower side locking piece 55 of the movable side engaging part 51 are engaged with the first to third locking pieces 26, 27, 36 of the fixed side engaging part 11. Thus, it becomes impossible to remove both ends of the shield plate 4 from the helmet body 2.

  Further, the shield plate 4 is held in a ventilation position slightly opened from the fully closed position P <b> 1 by inserting the columnar part 52 a of the engaging protrusion 52 into the third recess 48. The movement of the shield plate 4 in the opening direction is restricted by the engagement protrusion 52 coming into contact with the restriction surface 44a of the stopper 44 as shown in FIG. When the movement of the shield plate 4 is restricted in this way, the columnar portion 52a of the engagement protrusion 52 is inserted into the second recess 47 and held at the fully open position P2.

  When removing the shield plate 4 from the helmet body 2, first, the shield plate 4 is opened to the fully open position P2, and then both ends of the shield plate 4 are directed to the side of the helmet 1 as shown in FIG. Pull. By this operation, the state in which the engagement protrusion 52 is in contact with the stopper 44 is released.

Then, the shield plate 4 is further opened from the fully open position P2 while pulling the shield plate 4 to the side, and the engagement protrusion 52 is moved into the wide portion 41a of the guide groove 41 as shown in FIG. When the engagement protrusion 52 enters the wide portion 41a, the shield plate 4 moves to the removal position P3.
In this state, the upper locking piece 54 of the movable side engaging portion 51 moves to the rear of the helmet 1 from the first locking piece 26 of the fixed side engaging portion 11 so as to be positioned in the upper sector space S1. become. Further, the lower locking piece 55 of the movable side engaging portion 51 moves upward from the third locking piece 36 of the fixed side engaging portion 11 and comes to be positioned in the lower fan-shaped space S2. That is, when the shield plate 4 moves to the removal position P3, the engaged state between the movable side engaging portion 51 and the fixed side engaging portion 11 is released as shown in FIG.

  Next, as shown in FIG. 17 (B), the left and right end portions of the shield plate 4 are pulled away from the helmet body 2 on both sides, and the movable side engaging portion 51 of the fixed side engaging portion 11 is pulled. Pull out. Then, as shown in FIG. 17C, the shield plate 4 is moved to the front of the helmet 1 as a whole, and the engagement between the engagement protrusion 52 of the shield plate 4 and the arcuate engagement portion 12 is released. Thereafter, the shield plate 4 can be detached from the fixed shaft base member 5 (helmet body 2) by further pulling both sides of the shield plate 4 away from the helmet body 2.

  For this reason, in the helmet 1 according to this embodiment, the shield plate 4 is simply removed by rotating the shield plate 4 to the removal position P3 and pulling both sides of the shield plate 4 sideways and forward. be able to. In the helmet 1 according to this embodiment, an operation as described in Patent Document 2 and Patent Document 3, that is, an operation of releasing the engagement by pushing the nail piece with a finger and fixing the movable side engaging portion of the shield plate. The operation for releasing the engagement of the shaft base member with the small protrusion is not necessary.

Accordingly, in the helmet 1 according to this embodiment, the position of the shield plate 4 (fully opened position P2) when attached to the helmet body 2 is different from the position of the shield plate 4 when removed from the helmet body 2 (detachment position P3). Therefore, it is possible to adopt a structure that can be easily attached at the position when the shield plate 4 is attached to the helmet body 2, and a structure that is easy to remove at the position when the shield plate 4 is removed from the helmet body 2. I was able to.
As a result, as shown in this embodiment, the helmet 1 in which the shield plate 4 can be easily attached and detached can be provided.

  In the helmet 1 according to this embodiment, the shield plate 4 is moved to the removal position P3 by opening the shield plate 4 to the maximum outside the normal range A. For this reason, since it can be easily located in the position when removing the shield plate 4, the operation | work which removes the shield plate 4 from the helmet body 2 can be performed much more easily.

As the removal position P3, in addition to the position shown in this embodiment, that is, the shield plate 4 is positioned at a position further opened than the fully opened position P2, the shield plate 4 is positioned at a position further closed than the fully closed position P1. Is possible.
Moreover, the attachment position when attaching the shield plate 4 to the helmet body 2 is not limited to the fully open position P2, and may be anywhere between the fully closed position P1 and the fully open position P2, and may be changed as appropriate. it can.

  The claw piece 24 according to this embodiment includes a slider 22 movably supported by the fixed shaft base member 5 and a compression coil spring 23 elastically mounted between the slider 22 and the fixed shaft base member 5. It is configured. For this reason, since elasticity can be provided to the claw piece 24 by the compression coil spring 23, the degree of freedom is increased in setting the urging force that urges the claw piece 24 to the initial position (engagement position).

  Therefore, according to this embodiment, the claw piece 24 moves easily when the lower locking piece 55 of the movable side engaging portion 51 is pressed against the third locking piece 36 of the claw piece 24. Since the urging force can be set, it is possible to provide a helmet in which the frictional contact portion between the lower locking piece 55 and the claw piece 24 is not easily worn.

  A buffer material 61 can be provided around the compression coil spring 23 as shown by a two-dot chain line in FIG. The buffer material 61 is made of, for example, foamed plastic, and is bonded to the fixed shaft base member 5 in a state where a part thereof is in contact with the compression coil spring 23. By providing the cushioning material 61 in this manner, it is possible to reduce noise generated by the vibration of the compression coil spring 23 when the shield plate 4 is attached to the helmet body 2.

  The arcuate engagement portion 12 of the fixed shaft base member 5 can be formed with a notch 62 through which an engagement protrusion 52 (not shown) can be inserted, as shown in FIGS. The notch 62 has a larger opening than the engaging piece 52b of the engaging protrusion 52 so that the engaging piece 52b of the engaging protrusion 52 cannot engage with the engaging piece 43 of the arcuate engagement portion 12. It is formed to do.

The notch 62 shown in FIG. 18 is formed at a position corresponding to the engagement protrusion 52 when the shield plate 4 is removed and positioned at the position P3. In other words, the notch 62 is a part of the locking piece 43 of the arcuate engagement portion 12, and the shield plate 4 is disengaged from the fixed side engagement portion 11 and the movable side engagement portion 51. It is formed in the part corresponding to the protrusion 52 for engagement of the shield board 4 in the state located in the position.
The notch 62 shown in FIG. 18 constitutes a first notch portion according to the seventh aspect of the present invention.

  Thus, by providing the notch 62 at the removal position P3, the engagement between the engagement protrusion 52 and the arcuate engagement portion 12 is released only by removing the shield plate 4 to the position P3. . For this reason, according to this embodiment, it is not necessary to move the shield plate 4 forward when removing the shield plate 4 from the helmet body 2, and it is only necessary to move both ends of the shield plate 4 to the side. Therefore, according to this embodiment, it is possible to provide a helmet capable of further easily removing the shield plate 4 from the helmet body 2.

  The notch 62 shown in FIG. 19 is formed at a position corresponding to the engaging protrusion 52 when the shield plate 4 is positioned at the attachment position (fully opened position P2). By providing the notch 62 at the mounting position of the shield plate 4 in this way, it is not necessary to translate the shield plate 4 toward the rear of the helmet 1 when the shield plate 4 is mounted on the helmet body 2. Can be more easily installed.

The notch 62 shown in FIG. 20 is formed at a position corresponding to the engaging protrusion 52 when the shield plate 4 is moved to an intermediate position between the fully closed position P1 and the fully open position P2. In other words, the notch 62 shown in FIG. 20 is formed at an intermediate portion in the longitudinal direction of the arcuate engagement portion 12.
In this embodiment, the engagement between the engagement protrusion 52 and the arcuate engagement portion 12 can be released by moving the shield plate 4 so that the engagement protrusion 52 moves to the notch 62.

  As an example of releasing the engagement between the engagement protrusion 52 and the arcuate engagement part 12 at the intermediate part of the arcuate engagement part 12, for example, when the shield plate 4 is attached to the helmet body 2, the movable side There is a case where the shield plate 4 is closed from the attachment position without noticing that the engaging portion 51 is not correctly engaged with the fixed-side engaging portion 11. Since the shield plate 4 is made of plastic and easily bends, either the upper locking piece 54 or the lower locking piece 55 of the movable side engaging portion 51 is correctly engaged with the fixed side engaging portion 11. Even if it is not in the state, it can be closed.

  In order to return such a state to a normal state, it is necessary to release the shield plate 4 to the removal position and release the engagement of the engagement portion. However, in such a case, since the shield plate 4 is inclined as compared with a normal state, the engaging protrusion 52 is pressed more strongly than the normal and the arc-shaped engaging portion 12 cannot be easily opened. . According to this embodiment, the engaging protrusion 52 can be brought out of the arc-shaped engaging portion 12 by passing the engaging protrusion 52 through the notch 62 formed in the intermediate portion of the arc-shaped engaging portion 12. Therefore, the shield plate 4 can be easily opened to the removal position, and can be easily returned to the normal state. The notch of the arcuate engagement portion described in Patent Document 3 is for engaging the engagement projection of the shield plate with the arcuate engagement portion. 62 is different.

The notch 62 shown in FIG. 21 is formed in the middle portion of the projecting wall 42 of the arcuate engagement portion 12 in the longitudinal direction. Thus, by providing the notch 62 in the protruding wall 42, the engagement protrusion 52 of the shield plate 4 can be projected from the arcuate engagement portion 12 to the front of the helmet 1. For this reason, this embodiment also has the same effect as the embodiment shown in FIG. In providing the notch 62 in the projecting wall 42, the position of the notch 62 is used when the shield plate 4 is located at the removal position P3 in addition to the intermediate portion of the arcuate engagement portion 12. The position corresponding to the protrusion 52 may be sufficient. The second notch referred to in the invention according to claim 8 of the present invention is constituted by the notch 62 shown in FIGS.

  In the embodiment shown in FIGS. 1 to 21, an example in which the claw piece 24 of the fixed shaft base member 5 is configured by the slider 22 and the compression coil spring 23 is shown. Can be formed as shown. In these drawings, the same or equivalent members as those described with reference to FIGS. 1 to 21 are denoted by the same reference numerals, and detailed description thereof is omitted as appropriate.

The claw pieces 71 shown in FIGS. 22 and 23 are integrally formed with the fixed shaft base member 5 by integral molding. The claw piece 71 constitutes the claw piece referred to in the invention of claim 6 . More specifically, the claw piece 71 according to this embodiment includes an arm portion 72 projecting from the projecting wall 21 of the fixed side engaging portion 11 so as to constitute a part of the hole wall surface of the shaft hole 25, and the arm portion. The columnar part 73 (refer FIG. 23) extended toward the side of the helmet 1 from the front-end | tip of 72, and the 3rd latching piece 36 provided in the front-end | tip part of this columnar part 73 are comprised.

The arm portion 72 is formed so as to be easily elastically deformable in a direction away from the center of the shaft hole 25 when a pressing force is applied to the third locking piece 36.
Although the columnar portion 73 and the third locking piece 36 are not shown, the lower locking piece 55 of the movable side engaging portion 51 in a state where the shield plate 4 is positioned at the mounting position (fully opened position P2). (For example, see FIG. 12).

  According to this embodiment, as compared with the embodiments shown in FIGS. 1 to 21, the work of assembling the claw piece 24 to the fixed shaft base member 5 becomes unnecessary, the number of parts is reduced, and the assembly man-hour of the helmet 1 is reduced. Therefore, a helmet that can be easily assembled can be provided.

  In the embodiment shown in FIGS. 1 to 23, an example in which the claw piece referred to in the present invention is provided in the fixed-side engagement portion 11 is shown, but the claw piece can be provided in the arcuate engagement portion 12. In this case, the slider 22 or the columnar portion 73 is formed so as to constitute a part of the locking piece 43 and is supported by the fixed shaft base member 5 so as to be movable. The position where the slider 22 or the columnar portion 73 is provided is a position where the second recess 47 is formed.

  DESCRIPTION OF SYMBOLS 1 ... Helmet, 2 ... Helmet main body, 4 ... Shield plate, 5 ... Fixed shaft base member, 11 ... Fixed side engaging part, 12 ... Arc-shaped engaging part, 21, 42 ... Projection wall, 22 ... Slider, 23 ... Compression coil spring, 24 ... claw piece, 26 ... first locking piece, 27 ... second locking piece, 36 ... third locking piece, 43 ... locking piece, 51 ... movable side engaging portion, 52 ... engaging projection, 54 ... upper locking piece, 55 ... lower locking piece, 71 ... claw piece, P1 ... fully closed position, P2 ... mounting position (fully opened position), P3 ... removal position.

Claims (8)

A helmet body having a front opening;
A fixed shaft base member for supporting a shield plate fixed to the left and right sides of the helmet body;
In a helmet comprising a shield plate rotatably and detachably supported via an engaging portion on the fixed shaft base member,
The engaging portion is in an engaged state when the shield plate is rotated in a normal range between a fully open position where the front opening is fully open and a fully closed position where the front opening is fully closed. And a plurality of locking pieces that are disengaged when the shield plate is rotated out of the normal range,
A part of the locking piece is engaged by elasticity by positioning the shield plate at a predetermined mounting position in the normal range and pressing the fixed plate base member from the outside of the helmet when the shield plate is attached to the helmet body. Formed by a nail piece that moves in the direction in which it is released ,
The helmet in which the mounting position of the shield plate when attached to the helmet body is different from the position of the shield plate when removed from the helmet body .   The helmet according to claim 1, wherein the position of the shield plate where the engagement portion is in the disengaged state is a position where the shield plate is opened from the fully open position. 3. The helmet according to claim 1, wherein the engaging portion includes a fixed-side engaging portion of a fixed shaft base member and a movable-side engaging portion of the shield plate, which are located on a rotating shaft portion of the shield plate, The rotation shaft portion is composed of an arcuate engagement portion of a fixed shaft base member extending in an arc shape at a position separated from the rotation shaft portion, and an engagement protrusion of a shield plate engaged therewith,
The claw piece is a helmet provided in the fixed side engaging portion . 3. The helmet according to claim 1, wherein the engaging portion includes a fixed-side engaging portion of a fixed shaft base member and a movable-side engaging portion of the shield plate, which are located on a rotating shaft portion of the shield plate, The rotation shaft portion is composed of an arcuate engagement portion of a fixed shaft base member extending in an arc shape at a position separated from the rotation shaft portion, and an engagement protrusion of a shield plate engaged therewith,
  The claw piece is a helmet provided in the arcuate engagement portion. The helmet according to claim 3 or 4 , wherein the claw pieces are slidably supported by the fixed shaft base member, and a spring member provided between the slider and the fixed shaft base member ; A helmet configured by a cushioning material, a part of which is in contact with the spring member . The helmet according to claim 3 or 4 , wherein the claw piece is integrally formed with the fixed shaft base member by integral molding. The helmet according to any one of claims 3 to 6 , wherein the shield plate is a part of the arcuate engagement portion, and the shield plate includes the fixed-side engagement portion and the movable-side engagement portion. The helmet is provided with a first cutout portion through which the engagement protrusion can be inserted in a portion corresponding to the engagement protrusion in a state where the engagement protrusion is released. The helmet according to any one of claims 3 to 7 , wherein a part of the arcuate engagement portion includes a second notch portion that is disengaged from the engagement protrusion. Helmet that is formed.

Images