Full-face helmet
The full-face helmet employs a rotatably supported shield with a dual-action locking mechanism to prevent shield release from impacts, enhancing security and reliability.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- ARAI HELMET LTD
- Filing Date
- 2024-12-05
- Publication Date
- 2026-06-17
Smart Images
Figure 2026098311000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a full-face helmet, particularly a full-face helmet provided with holding means for maintaining the shield in a closed state.
Background Art
[0002] Conventionally, a full-face helmet provided with holding means for holding an openable and closable shield that covers the front opening of the cap body of the full-face helmet in a closed state is known. (Patent Documents 1 to 3)
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Patent Document 2
Patent Document 3
Summary of the Invention
Problems to be Solved by the Invention
[0004] The full-face helmets described in Patent Documents 1 and 2 above are provided with a locking mechanism that locks by engagement or fitting through the sliding or rotation of a lock lever. The full-face helmet of Patent Document 3 above is provided with a holding device that holds the shield by hooking a hooked piece of the shield on a hooked piece of the cap body. In the full-face helmets described in Patent Documents 1 to 3, the shield is held by one engagement, fitting, or hooking, and there is a problem that the holding may be easily released depending on the direction and magnitude of the impact applied to the locking mechanism or the full-face helmet.
[0005] Therefore, the object of the present invention is to solve the above problems and provide a full-face helmet in which the shield is not easily released due to impact. [Means for solving the problem]
[0006] To solve the aforementioned problems, the present invention has the following configuration. A full-face helmet comprising a full-face shell, a shield that opens and closes the front opening of the shell, and a retaining device that holds the shield in a closed state, The shield is rotatably supported by the helmet body on one or a combination of left and right axes, The retaining device includes a fastening piece provided on the upper part of the chin guard portion of the helmet body, a retaining piece provided on the lower part of the shield that can be fastened to the fastening piece, and a locking piece that prevents the retaining piece fastened to the fastening piece from coming off the fastening piece. A full-face helmet characterized in that the locking piece is attached to the latching piece so as to be movable between a locked position and an unlocked position. [Effects of the Invention]
[0007] The full-face helmet of the present invention has a fastening piece provided on the upper part of the chin guard portion of the helmet body, a receiving piece provided on the lower part of the shield that can be fastened to the fastening piece, and a locking piece that prevents the receiving piece from coming off when fastened to the fastening piece. By attaching the locking piece to the fastening piece so as to be movable between a locked position and an unlocked position, a full-face helmet can be provided in which the shield is not easily released regardless of the direction or magnitude of the impact, through a double retention system of fastening between the receiving piece and the fastening piece and locking of the locking piece. [Brief explanation of the drawing]
[0008] [Figure 1] This is a side view of a full-face helmet 1 according to Embodiment 1 of the present invention. [Figure 2] This figure shows the latching piece 41 of Embodiment 1 according to the present invention. [Figure 3] FIG. showing the engaged piece 42 of Embodiment 1 according to the present invention. [Figure 4] FIG. showing the locking piece 43 of Embodiment 1 according to the present invention. [Figure 5] FIG. showing the engaging piece 41 of Embodiment 1 according to the present invention. [Figure 6] FIG. showing the engaging piece 41 and the locking piece 43 of Embodiment 1 according to the present invention. [Figure 7] FIG. showing the operation of the holding device 4 of Embodiment 1 according to the present invention. [Figure 8] FIG. showing the engaging piece 51 and the locking piece 53 of Modification 1 according to the present invention. [Figure 9] Side view of the full-face helmet 1 of Embodiment 2 according to the present invention. [Figure 10] FIG. showing the engaging piece 41 of Embodiment 2 according to the present invention. [Figure 11] FIG. showing the engaged piece 42 of Embodiment 2 according to the present invention. [Figure 12] FIG. showing the locking piece 43 of Embodiment 2 according to the present invention. [Figure 13] FIG. showing the engaging piece 41 of Embodiment 2 according to the present invention. [Figure 14] FIG. showing the engaging piece 41 and the locking piece 43 of Embodiment 2 according to the present invention. [Figure 15] FIG. showing the spring 44 of Embodiment 2 according to the present invention. [Figure 16] FIG. showing the operation of the holding device 4 of Embodiment 2 according to the present invention. [Figure 17] FIG. showing the closing operation of the holding device 4 of Embodiment 2 according to the present invention. [Figure 18] FIG. showing the opening operation of the holding device 4 of Embodiment 2 according to the present invention. [Figure 19] FIG. showing the engaging piece 51 and the locking piece 53 of Modification 2 according to the present invention.
MODE FOR CARRYING OUT THE INVENTION
[0009] [Embodiment 1] Embodiment 1 according to the present invention will be described in detail based on the drawings. In this specification, the face direction of the wearer is defined as front, the opposite side as rear, the left side when facing forward as left, the right side as right, the top of the head as up, and the opposite side as down.
[0010] [Overall Structure] FIG. 1 is a view of the full-face helmet 1 according to Embodiment 1 of the present invention as seen from the left. (a) shows the open state of the shield 3, (b) shows the latching state of the latched piece 42 to the latching piece 41 and the non-locked state of the lock piece 43, and (c) shows the latching state of the latched piece 42 to the latching piece 41 and the locked state of the lock piece 43. The full-face helmet 1 has a cap body 2 formed in a full-face shape, a shield 3 for opening and closing the front opening 21 of the cap body 2, and a holding device 4 for holding the shield 3 in the closed state.
[0011] [Cap Body] The cap body 2 is a known cap body, and is composed of a shell formed of resin, fiber reinforced resin (such as glass fiber reinforced resin, carbon fiber reinforced resin, etc.), an impact absorption liner attached to the inside thereof and formed of foamed styrene, and an interior pad disposed inside the impact absorption liner. On the inner surfaces of the left and right side portions near the lower opening of the cap body 2, a chin strap (not shown) for fixing the full-face helmet 1 to the wearer's head is attached. On the front surface of the cap body 2, a front opening 21 for exposing a part of the wearer's face is provided, and a chin guard portion 22 for protecting the vicinity of the chin is formed below it. Sealing rubber (not shown) is attached to the entire circumference of the inner peripheral edge 21a of the front opening 21, and is configured to be in close contact with the inner surface of the shield 3 when the shield 3 is in the closed state to maintain airtightness. On both left and right side portions of the front opening 21, shield support members 23 for rotatably supporting the shield 3 are attached.
[0012] [Shield] The shield 3 is rotatably supported by shield support members 23 attached to both the left and right sides of the front opening 21 of the helmet shell 2. In this embodiment 1, although a detailed explanation is omitted, it is configured to rotate on a composite axis. It is also possible to configure it to rotate on a single axis.
[0013] [Holding device] The retaining device 4 is a component for holding the shield 3 in a closed state, and has a latching piece 41 attached to the lower outer surface of the front opening 21 at the upper part near the left-right center of the chin guard portion 22 of the helmet body 2, a retaining piece 42 attached near the left-right center of the lower edge of the shield 3, and a locking piece 43 attached to the latching piece 41. In this embodiment 1, the latching piece 41 and the latched piece 42 of the retaining device 4 are attached near the left and right center of the chin guard portion 22 and the shield 3, respectively. However, they are not limited to this and may be attached at any position between the right end and the left end of the chin guard portion 22 and the shield 3.
[0014] Figure 2 shows the latching piece 41 of Embodiment 1 according to the present invention, with the upper left figure being a top view, the upper right figure being a perspective view, the lower left figure being a front view, and the lower right figure being a left view. The latching piece 41 has a fixing plate portion 41a, a latching projection portion 41b, and a latching protrusion portion 41c. The fixing plate portion 41a and the latching projection portion 41b are integrally molded from metal or resin. The fixing plate portion 41a has a long shape from left to right, and screw holes are formed on both the left and right sides for attachment to the chin guard portion 22. At the left and right center of the fixing plate portion 41a, a latching projection 41b is formed so as to protrude forward when attached to the chin guard portion 22. The latching projection 41c is mounted on the lower surface of the latching projection 41b so as to be retractable, and is biased in the direction of protrusion by a biasing member (not shown) housed within the latching projection 41b, such as a compression coil spring. The latching projection 41c may also be integrally formed with the lower part of the latching projection 41b.
[0015] Figure 3 shows the fastening piece 42 of Embodiment 1 according to the present invention, with the upper left figure being a top view, the upper right figure being a perspective view, the lower left figure being a front view, and the lower right figure being a left view. The retaining piece 42 has an attachment portion 42a at the top and a retaining portion 42b at the bottom, and a connecting portion 42c that connects the left and right sides of the attachment portion 42a and the retaining portion 42b, all integrally molded from metal or resin. These mounting portion 42a, the hooked portion 42b, and the connecting portion 42c form a hooked opening 42d in the center of the hooked piece 42. The latching piece 42 is formed in a thin, plate-like shape when viewed from the side. An engaging recess 42e is formed near the boundary between the latched portion 42b and the left and right connecting portions 42c. This engaging recess 42e is the point where it engages with the engaging projection 43e of the locking piece 43, which will be described later.
[0016] Figure 4 shows a locking piece 43 of Embodiment 1 according to the present invention, with the upper left figure being a top view, the upper right figure being a perspective view, the lower left figure being a front view, and the lower right figure being a left view. The locking piece 43 is integrally molded from metal or resin and consists of two left and right pivot shaft portions 43a, a locking portion 43b, and a support portion 43c connecting the left and right sides of these pivot shaft portions 43a and locking portion 43b. The rotating shaft portion 43a, the locking portion 43b, and the support portion 43c form a locking opening 43d in the center of the locking piece 43. When viewed from the side, the locking piece 43 is formed in the shape of a thin plate. Engaging projections 43e are formed at the left and right rear ends of the locking portion 43b. These engaging projections 43e are the points that engage with the engaging recesses 42e of the latched piece 42.
[0017] Figure 5 is an exploded and assembled view of a latching piece 41, which is part of the retaining device 4 of Embodiment 1 according to the present invention. Figure 6 shows a latching piece 41 and a locking piece 43, which are part of the retaining device 4 of Embodiment 1 according to the present invention. (a) shows the unlocked state of the locking piece 43, and (b) shows the locked state of the locking piece 43. The top figure is a perspective view, the middle figure is a view from the front, and the bottom figure is a view from the left. In this embodiment 1, as shown in Figure 5, the latching piece 41 is composed of two members: a latching portion 411 and a base portion 412. The latching portion 411 and the base portion 412 are integrally molded from metal or resin, respectively. The fixing plate portion 41a is composed of a latching portion 411 and a base portion 412, and the latching projection 41b and latching protrusion 41c are formed on the latching portion 411. The latching portion 411 and the base portion 412 have a latching portion side groove portion 411d of the latching portion 411 and a base portion side groove portion 412d of the base portion 412, which form a hole 41d when the latching portion 411 and the base portion 412 are assembled.
[0018] With the pivot shaft portion 43a of the locking piece 43 engaged with either the side groove portion 411d of the latching piece or the side groove portion 412d of the base piece, the latching piece 411 and the base 412 are assembled and attached to the helmet body 2 with screws, and the latching piece 41 and the locking piece 43 are fixed to the helmet body 2 in the assembled state shown in Figure 6. The locking piece 43 is rotatable up and down around a pivot shaft portion 43a that is inserted and supported in the hole 41d of the latching piece 41. As will be described later, the locking piece 43 is unlocked when rotated upward and locked when rotated downward. The locking piece 43 is rotatable to a position where it contacts the front surface of the latching projection 41c attached to the latching projection 41b, even when the latched piece 42 is not latched to the latching piece 41. The locking piece 43 rotates (moves) between an upper unlocked position (unlocked position) and a lower locked position such that the inner circumferential surface of the locking opening 43d is aligned with the outer surface of the latching projection 41b.
[0019] Projections 41b1 are provided on both the left and right sides of the latching projection 41b of the latching piece 41, and grooves 43c1 are formed on the inner surfaces of the left and right support portions 43c of the locking piece 43. The groove 43c1 is formed at the lower part of the support portion 43c, with its lower end opening below the support portion 43c and its upper end forming a stepped portion. In the unlocked state of the locking piece 43, the projection 41b1 of the latching piece 41 is fitted into the groove 43c1 of the locking piece 43 and engages with the stepped portion at the upper end of the groove 43c1, preventing the locking piece 43 from rotating from the unlocked position to the locked position (see Figure 6(a)). When the locking piece 43 is rotated downward from the unlocked position, the stepped portion at the upper end of the groove 43c1 of the locking piece 43 overcomes the projection 41b1 of the latching piece 41, and the locking piece 43 moves to the locked position. When the locking piece 43 is in the locked position, the projection 41b1 of the latching piece 41 abuts from above against the upper edge 43c2 above the groove 43c1 of the support portion 43c of the locking piece 43, thereby preventing the locking piece 43 from rotating from the locked position to the unlocked position (see Figure 6(b)). When the locking piece 43 is rotated upward from the locked position, the upper edge 43c2 of the locking piece 43 overcomes the projection 41b1 of the latching piece 41, the projection 41b1 of the latching piece 41 engages with the groove 43c1 of the locking piece 43, and the locking piece 43 rotates (moves) to the unlocked position.
[0020] [Holding operation] Figure 7 shows the operation of the holding device 4 of Embodiment 1 according to the present invention, where (a) shows the rotational operation of the locking piece 43, and (b) shows the engagement operation of the engaging recess 42e of the retained piece 42 and the engaging projection 43e of the locking piece 43. The retaining piece 42 is attached to the outer surface of the shield 3 so as to protrude downward from the lower edge near the left-right center of the shield 3, and when the shield 3 is closed, the retaining piece 42 can be hooked onto the retaining piece 41. With the shield 3 in the open position, push downwards with your finger (for example, one index finger) on the upper mounting portion 42a of the latching piece 42 to fit the latching opening 42d of the latching piece 42 onto the latching projection 41b of the latching piece 41. Then, the rear surface of the hooked portion 42b of the hooked piece 42 comes into contact with the front surface of the hooking projection 41c, which is retractably attached to the lower surface of the hooking projection 41b of the hooked piece 42. When the mounting portion 42a, etc., is pushed further to the rear in this contact state, the hooking projection 41c retracts into the interior of the hooking projection 41b against the biasing member. The hooked portion 42b then moves to the rear side of the hooking projection 41c, and the rear surface of the hooking projection 41c, which has been pushed out by the biasing member, comes into contact with the front surface of the hooked portion 42b, and the hooked piece 42 is hooked to the hooking projection 41c so that it does not move forward.
[0021] Even when the retaining portion 42b of the retaining piece 42 is retained on the retaining projection 41c of the retaining piece 41, the shield 3 can be sufficiently prevented from opening. However, there is a risk that the shield 3 may open if a greater force is applied to the helmet body 2, or depending on the location and direction of the force applied to the helmet body 2. Therefore, in this embodiment 1, a locking piece 43 is provided to more reliably hold the shield in a closed state. When the shield 3 is open, the locking piece 43 is in an unlocked position rotated upward. When the locking piece 43 is in the unlocked position, and the shield 3 is closed to engage the retaining piece 42 with the retaining piece 41, the locking piece 43 can pass through the retaining opening 42d of the retaining piece 42, and the locking piece 43 does not obstruct the action of engaging the retaining piece 42 with the retaining piece 41. With the retaining piece 42 engaged with the retaining piece 41, press the locking portion 43b of the locking piece 43 downward with your finger (for example, one index finger) to rotate the locking piece 43 to the lower locked position and lock the retaining piece 42. The locking piece 43 prevents the retained piece 42 from coming off the retaining piece 41, thereby reliably preventing the retained piece 42 from coming off the retaining piece 41. As described above, the closed state of the shield 3 can be reliably maintained by only two actions: fitting the retained piece 42 onto the retaining piece 41 and rotating the locking piece 43 to the locked position.
[0022] The locking mechanism of the locking piece 43 effectively prevents the retaining piece 42 from coming off the retaining piece 41. However, there is a risk that the retaining piece 42 may come off if a greater force is applied to the helmet body 2, or depending on the location and direction of the force applied to the helmet body 2. Therefore, in this embodiment 1, an engaging member is formed between the retaining piece 42 and the locking piece 43. As described above, an engagement recess 42e is formed near the boundary between the latched portion 42b and the left and right connecting portions 42c. This engagement recess 42e is formed to be recessed in the thickness direction when viewed from the side of the latched piece 42. Furthermore, engaging projections 43e are formed at the left and right rear ends of the locking portion 43b. These engaging projections 43e are formed to protrude from the left and right rear ends of the locking portion 43b toward the pivot shaft portion 43a. As shown in Figure 7(b), when the locking piece 43 is rotated from the unlocked position (unlocked position) to the locked position while the locking piece 42 is locked onto the locking piece 41, the engaging recess 42e and the engaging projection 43e are configured to engage. As shown by the arrows in Figure 7(b), the trajectory of the retained piece 42 rotating in the direction of disengaging from the retained state and the trajectory of the locking piece 43 rotating in the direction of the unlocked position are in different directions. Even if a large force is applied to the retained piece 42 in the direction of disengaging from the retained state, the engaging recess 42e and the engaging projection 43e fit together securely, making it possible to more reliably prevent the retained piece 42 from rotating in the direction of disengaging.
[0023] [Hold release operation] By placing a finger (for example, one index finger) on the locking portion 43b of the locking piece 43 in the locked position from below, the locking piece 43 is lifted upward, and the locking piece 43 is rotated to the upper unlocked position. At this time, the engaging projection 43e disengages from the engaging recess 42e, and the lock by the locking piece 43 is released. Next, place a finger (for example, a thumb) on the back of the hooked portion 42b at the lower end of the hooked piece 42 and pull the hooked piece 42 upward. At this time, the front surface of the hooked portion 42b comes into contact with the rear surface of the hooking projection 41c of the hooking projection 41b. When pulled further, the hooking projection 41c retracts into the interior of the hooking projection 41b against the biasing member, and the hooked portion 42b can move to the front side of the hooking projection 41c. Then, the hooked opening 42d of the hooked piece 42 disengages from the hooking projection 41b of the hooked piece 41, and the holding state of the holding device 4 is released. In this way, the closed state of the shield 3 can be easily released by only two actions: rotating the locking piece 43 to the unlocked position and pulling it out from the retained piece 42.
[0024] [Example 1] A modified example of Embodiment 1 according to the present invention will be described. Figure 8 shows a latching piece 51 and a locking piece 53, which are part of the retaining device of Modification 1 according to the present invention. (a) shows the unlocked state of the locking piece 53, and (b) shows the locked state of the locking piece 53. The upper figure is a perspective view, and the lower figure is a view from the left. The full-face helmet of Modification 1 differs from the full-face helmet 1 of Embodiment 1 only in the movement structure of the locking piece; all other configurations are the same as the full-face helmet 1 of Embodiment 1. In this modified example 1, the locking piece 53 is attached to the fixing plate portion 51a of the latching piece 51 so as to slide (move) in the vertical direction, as indicated by the arrow in Figure 8. Although not shown, the locking piece 53 has a sliding support portion formed at the same position as the pivot shaft portion 43a of the locking piece 43 in Embodiment 1, and sliding grooves are formed at two locations on the left and right sides of the fixing plate portion 51a to slidably support the sliding support portion.
[0025] In this modified example 1, the holding operation involves hooking the retaining piece (not shown, but having the same configuration as the retaining piece 42 in Embodiment 1) onto the retaining piece 51, then pressing the locking portion 53b of the locking piece 53 downward with a finger (for example, one index finger) to slide the locking piece 53 to the lower locking position and lock the retaining piece. The locking piece 53 prevents the retained piece from coming off the retaining piece 51, thereby reliably preventing the retained piece from coming off the retaining piece 51. Protrusions 51b1 are provided on both the left and right sides of the latching projection 51b of the latching piece 51. When the locking piece 53 is in the unlocked position, the projection 51b1 of the latching piece 51 abuts against the support portion 53c of the locking piece 53 from below, preventing the locking piece 53 from moving from the unlocked position to the locked position (see Figure 8(a)). Furthermore, when the locking piece 53 is in the locked position, the projection 51b1 of the latching piece 51 abuts against the support portion 53c of the locking piece 53 from above, preventing the locking piece 53 from moving from the locked position to the unlocked position (see Figure 8(b)). The locking piece 53 moves between the unlocked position and the locked position, with the support portion 53c moving over the projection 51b1.
[0026] In this modified example 1, although not shown in the figures, similar to Embodiment 1, the retaining piece has an engaging recess and the locking piece 53 has an engaging projection. The locking piece 53 is configured to engage with the engaging recess and engaging projection when the locking piece 53 is slid from the unlocked position to the locked position while the locking piece is engaged with the locking piece 51. The trajectory of the locking piece as it rotates in the direction of disengaging from the locked state and the trajectory of the locking piece as it slides in the direction of disengaging from the locked state are in different directions. Even if a large force is applied to the locking piece in the direction of disengaging from the locked state, the engaging recess and engaging projection will firmly engage, more reliably preventing the locking piece from rotating in the direction of disengaging. These engaging recesses and engaging protrusions allow for more secure retention of the shield 3. Then, a finger (for example, one index finger) is placed on the locking portion 53b of the locking piece 53 in the locked position from below, and the locking piece 43 is lifted upward, sliding the locking piece 53 to the upper unlocked position. At this time, the engaging projection disengages from the engaging recess, and the lock by the locking piece 53 is released.
[0027] [Embodiment 2] Embodiment 2 of the present invention will be described in detail with reference to the drawings. This second embodiment differs from the first embodiment mainly in its locking mechanism.
[0028] [Overall structure] Figure 9 is a view from the left of the full-face helmet 1 according to Embodiment 2 of the present invention, where (a) is the open state of the shield 3, (b) is the state in which the retaining piece 42 is retained on the retaining piece 41 and the locking piece 43 is not locked, and (c) is the state in which the retaining piece 42 is retained on the retaining piece 41 and the locking piece 43 is locked. The full-face helmet 1 includes a shell 2 molded into a full-face shape, a shield 3 that opens and closes the front opening 21 of the shell 2, and a retaining device 4 that holds the shield 3 in the closed position. Since the helmet shell 2 and shield 3 have the same configuration as in Embodiment 1, a detailed explanation will be omitted.
[0029] [Holding device] The holding device 4, like in Embodiment 1, has a latching piece 41, a latched piece 42, and a locking piece 43. In this embodiment 2, the latching piece 41 and the latched piece 42 of the retaining device 4 are attached near the left and right center of the chin guard portion 22 and the shield 3, respectively. However, they are not limited to this and may be attached at any position between the right end and the left end of the chin guard portion 22 and the shield 3.
[0030] Figure 10 shows the latching piece 41 of Embodiment 2 according to the present invention, with the upper left figure being a top view, the upper right figure being a perspective view, the lower left figure being a front view, and the lower right figure being a left view. The latching piece 41 has a fixing plate portion 41a, a latching projection portion 41b, and a latching protrusion portion 41c. The fixing plate portion 41a has a long shape from left to right, and screw holes are formed on both the left and right sides for attachment to the chin guard portion 22. At the left and right center of the fixing plate portion 41a, a latching projection 41b is formed so as to protrude forward when attached to the chin guard portion 22. In this second embodiment, unlike in embodiment 1, the latching projection 41c is integrally formed on the lower part of the latching projection 41b. Alternatively, the latching projection 41c may be mounted on the lower surface of the latching projection 41b so as to be retractable, and may be biased in the direction of protrusion by a biasing member housed within the latching projection 41b, similar to embodiment 1.
[0031] Figure 11 shows the fastening piece 42 of Embodiment 2 according to the present invention, with the upper left figure being a top view, the upper right figure being a perspective view, the middle left figure being a front view, the middle right figure being a left view, and the lower right figure being a perspective view. The retaining piece 42 has an attachment portion 42a at the top and a retaining portion 42b at the bottom, and a connecting portion 42c that connects the left and right sides of the attachment portion 42a and the retaining portion 42b, all integrally molded from metal or resin. These mounting portion 42a, the hooked portion 42b, and the connecting portion 42c form a hooked opening 42d in the center of the hooked piece 42. The latching piece 42 is formed in a thin, plate-like shape when viewed from the side. An engaging projection 42f is formed near the boundary between the latched portion 42b and the left and right connecting portions 42c. This engaging projection 42f is the point where it engages with the engaging projection 43f of the locking piece 43, which will be described later.
[0032] Figure 12 shows a locking piece 43 of Embodiment 2 according to the present invention, with the upper left figure being a top view, the upper right figure being an oblique view, the middle left figure being a front view, the middle right figure being a left view, and the lower right figure being a perspective view. The locking piece 43 is integrally molded from metal or resin, comprising a pivot shaft portion 43a, a locking portion 43b, and a support portion 43c connecting the left and right sides of the pivot shaft portion 43a and the locking portion 43b. The rotating shaft portion 43a, the locking portion 43b, and the support portion 43c form a locking opening 43d in the center of the locking piece 43. When viewed from the side, the locking piece 43 is formed in the shape of a thin plate. Engaging projections 43f are formed at the left and right rear ends of the locking portion 43b. These engaging projections 43f are the points that engage with the engaging projections 42f of the latched piece 42.
[0033] Figure 13 is an exploded and assembled view of a latching piece 41, which is part of the retaining device 4 of Embodiment 2 according to the present invention. Figure 14 shows a latching piece 41 and a locking piece 43, which are part of the retaining device 4 of Embodiment 2 according to the present invention. (a) shows the unlocked state of the locking piece 43, and (b) shows the locked state of the locking piece 43. The top figure is a perspective view, the middle figure is a view from the front, and the bottom figure is a view from the left. In this second embodiment, as in the first embodiment, the latching piece 41 is composed of two members, a latching portion 411 and a base portion 412, as shown in Figure 13. The latching portion 411 and the base portion 412 are integrally molded from metal or resin, respectively. The fixing plate portion 41a is composed of a latching portion 411 and a base portion 412, and the latching projection 41b and latching protrusion 41c are formed on the latching portion 411. The latching portion 411 and the base portion 412 have a latching portion side groove portion 411d of the latching portion 411 and a base portion side groove portion 412d of the base portion 412, which form a hole 41d when the latching portion 411 and the base portion 412 are assembled.
[0034] In this second embodiment, as shown in Figures 14 and 15, a spring 44 (elastic member) that biases the locking piece 43 to a locked state is interposed between the latching piece 41 and the locking piece 43. The spring 44 is a double torsion spring, with two coil sections fitted onto both ends of the pivot shaft portion 43a of the locking piece 43, both ends being locked to the base portion 412, and the connecting portion of the two coil sections being locked to the locking portion 43b of the locking piece 43. Note that the spring 44 is not limited to a double torsion spring; two torsion springs may be used in pairs, or a single torsion spring may be used, or any known spring may be appropriately selected and used. When the pivot shaft portion 43a of the lock piece 43, to which the spring 44 is attached, is engaged with either the side groove portion 411d of the latch portion or the side groove portion 412d of the base portion, the latch portion 411 and the base portion 412 are assembled and attached to the helmet body 2 with screws, the latch piece 41 and the lock piece 43 are fixed to the helmet body 2 in the assembled state shown in Figure 14.
[0035] Figure 16 is a diagram showing the operation of the holding device 4 of Embodiment 2 according to the present invention, where (a) is a diagram showing the operating range of the locking piece 43, and (b) is a diagram showing the engagement state of the engaging projection 42f of the retained piece 42 and the engaging projection 43f of the locking piece 43. The locking piece 43 is rotatable up and down around a pivot shaft portion 43a that is inserted and supported in the hole 41d of the latching piece 41. As will be described later, the locking piece 43 is unlocked when rotated downwards and locked when rotated upwards. Furthermore, the locking piece 43 rotates (moves) between an upper locked position and a lower unlocked position (unlocked position) such that the inner circumferential surface of the locking opening 43d is aligned with the outer surface of the latching projection 41b. As shown in Figure 16(b), when the shield 3 is closed, the latched portion 42b of the latched piece 42 engages with the latching projection 41c of the latched piece 41. Also, when the lock piece 43 is locked, the engaging projection 42f of the latched piece 42 engages with the engaging projection 43f of the lock piece 43.
[0036] [Holding operation] Figure 17 shows the holding operation (closing operation) of the holding device 4 of Embodiment 2 according to the present invention, and the holding operation proceeds in the order of (a), (b), (c), and (d). The retaining piece 42 is attached to the outer surface of the shield 3 so as to protrude downward from the lower edge near the left-right center of the shield 3, and when the shield 3 is closed, the retaining piece 42 can be hooked onto the retaining piece 41. As shown in Figure 17(a), from the open position of the shield 3, the upper mounting portion 42a of the retaining piece 42 is pushed downward with a finger (for example, one index finger) to move the shield 3 to the closed position so that the retaining opening 42d of the retaining piece 42 fits onto the retaining projection 41b of the retaining piece 41. At this time, the locking piece 43 is in the upper locked position due to the spring 44. As shown in Figure 17(b), the lower surface of the engaging projection 42f of the latched piece 42 abuts from above against the upper surface of the locking portion 43b of the locking piece 43 in the locked position. As shown in Figure 17(c), when the retaining piece 42 is further pushed downward, the locking piece 43 is pushed downward in the unlocked position (unlocked position) against the biasing force of the spring 44. When the locking piece 43 is pushed down to near the unlocked position, the engagement between the lower surface of the engaging projection 42f of the retained piece 42 and the upper surface of the locking portion 43b of the locking piece 43 is released, and the locking piece 43 rotates to the upper locked position due to the action of the spring 44. As shown in Figure 17(d), when the locking piece 43 rotates to the locked position, the engaging projection 43f of the locking piece 43 overcomes the engaging projection 42f of the retained piece 42, and the lower surface of the engaging projection 43f engages with the upper surface of the engaging projection 42f. (See also Figure 16(b)) At this time, the hooked portion 42b of the hooked piece 42 moves to the rear side of the hooked projection 41c of the hooked piece 41, and the front surface of the hooked portion 42b engages with the rear surface of the hooked projection 41c.
[0037] Even when the retaining portion 42b of the retaining piece 42 is retained on the retaining projection 41c of the retaining piece 41, the shield 3 can be sufficiently prevented from opening. However, there is a risk that the shield 3 may open if a greater force is applied to the helmet body 2, or depending on the location and direction of the force applied to the helmet body 2. Therefore, in this embodiment 2, a locking piece 43 is provided to more reliably hold the shield in a closed state. When the shield 3 is open, the locking piece 43 is in a locked position rotated upward. When the locking piece 43 is in the locked position, and the shield 3 is closed to engage the retaining piece 42 with the retaining piece 41, the locking piece 43 can be pushed downward by the retaining piece 42 as described above, and the locking piece 43 does not obstruct the action of engaging the retaining piece 42 with the retaining piece 41. Furthermore, in this second embodiment, the spring 44 biases the locking piece 43 toward the locked position, and when the retained piece 42 is engaged with the retaining piece 41, the locking piece 43, which has been pushed down to near the lower unlocked position, returns to the upper locked position. Therefore, the locking piece 43 can be rotated to the locked position simply by pushing down the retained piece 42. In other words, in this second embodiment, the shield 3 can be locked in the closed position with only one action: pushing down the latched piece 42 to engage it with the latched piece 41. As described above, this second embodiment offers the advantage of being able to lock the shield 3 more reliably with simple operations.
[0038] [Hold release operation] Figure 18 shows the release operation (opening operation) of the holding device 4 of Embodiment 2 according to the present invention, and the release operation proceeds in the order of (a), (b), and (c). As shown in Figure 18(a), in the locked state of the shield 3, the engaging projection 42f of the latched piece 42 engages with the engaging projection 43f of the lock piece 43, and the latched portion 42b of the latched piece 42 engages with the latching projection 41c of the latch piece 41. When the locking piece 43 is pushed down from the locked position to the unlocked position with a finger (for example, one index finger), the engaging projection 43f pushes down the engaging projection 42f, disengaging the two. At this time, because the engaging projection 42f, i.e., the retaining piece 42, is pushed down, and the shield 3 is biased in the opening direction by the sealing rubber attached around the entire circumference of the inner edge 21a of the front opening 21 of the helmet body 2, the engagement between the retaining portion 42b of the retaining piece 42 and the retaining projection 41c of the retaining piece 41 is disengaged, and the retaining piece 42 moves slightly forward. As shown in Figure 18(b), the upper surface of the engaging projection 43f of the pressed-down locking piece 43 abuts from below against the lower surface of the engaging projection 42f of the latched piece 42 which has moved forward, thereby preventing the locking piece 43 from moving to the upper locked position by the spring 44. As shown in Figure 18(c), with the engaging projection 43f in contact with the engaging projection 42f from below, the shield 3 can be moved to the open position by placing a finger (for example, a thumb) on the back of the retaining portion 42b at the lower end of the retaining piece 42 and pulling the retaining piece 42 upward.
[0039] In this second embodiment, the spring 44 biases the locking piece 43 toward the locked position, and even if the locking piece 43 is pushed down to the unlocked position, it tries to return to the locked position. However, as described above, the engaging projection 43f of the locking piece 43 comes into contact with the engaging projection 42f of the latched piece 42, preventing it from returning to the locked position. Therefore, it is not necessary to hold the locking piece 43 in the unlocked position with a finger or the like, making it easier to release the lock. In this way, the shield 3 can be easily opened with only two actions: rotating the locking piece 43 to the unlocked position and lifting the latched piece 42. As described above, this second embodiment offers the advantage of being able to more reliably unlock the shield 3 and open it easily.
[0040] [Differentiation 2] A modified example of Embodiment 2 according to the present invention will be described. Figure 19 shows a latching piece 51 and a locking piece 53, which are part of the retaining device of Modification 2 according to the present invention. (a) shows the locking piece 53 in the unlocked state, and (b) shows the locking piece 53 in the locked state. The upper figure is a perspective view, and the lower figure is a view from the left. The latching piece 51 and locking piece 53 in this modified example 2 have the same configuration as the latching piece 51 and locking piece 53 in modified example 1. In this modified example 2, the upper position of the locking piece 53 is the locked position, and the lower position is the unlocked position. Furthermore, as in Embodiment 2, the locking piece 53 can be configured to be biased upward towards the locked position by a spring. Also, the latching projection 51c may be formed integrally with the lower part of the latching projection 51b, as in Embodiment 2.
[0041] Although Embodiment 1, Modification 1, Embodiment 2, and Modification 2 of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and any design changes, etc., that do not depart from the spirit of the present invention are also included. Furthermore, Embodiment 1, Modification 1, Embodiment 2, and Modification 2 can be combined by utilizing each other's technologies, as long as there are no particular contradictions or problems in their purpose and configuration. [Explanation of symbols]
[0042] 1 Full-face helmet 2. Helmet shell 21 Front opening 21a Inner periphery 22 Chin guard section 23 Shield support member 3 Shields 4 Holding device 41 Latch piece 41a Fixed plate part 41b Latching protrusion 41b1 Protrusion 41c Locking projection 41d Hole 411 Latch part 411d Locking part side groove 412 Base 412d Base side groove section 42 Latched piece 42a Mounting part 42b Latched part 42c connection part 42d Latched opening 42e Engaging recess 42f Engagement protrusion 43 Rock Pieces 43a Rotating shaft section 43b Lock section 43c Support part 43c1 Groove 43c2 Upper edge 43d Lock opening 43e Engagement protrusion 43f Engagement protrusion 44 Springs 51 Latch piece 51a Fixed plate part 51b Latching protrusion 51b1 Protrusion 51c Locking projection 53 Rock Pieces 53b Lock section 53c Support part
Claims
1. A full-face helmet comprising a full-face shell, a shield that opens and closes the front opening of the shell, and a retaining device that holds the shield in a closed state, The shield is rotatably supported by the helmet body on one or a combination of left and right axes, The retaining device includes a fastening piece provided on the upper part of the chin guard portion of the helmet body, a retaining piece provided on the lower part of the shield that can be fastened to the fastening piece, and a locking piece that prevents the retaining piece, which is fastened to the fastening piece, from coming off the fastening piece. A full-face helmet characterized in that the locking piece is attached to the latching piece so as to be movable between a locked position and an unlocked position.
2. The full-face helmet according to claim 1, characterized in that the locking piece is rotatably attached to the latching piece.
3. The full-face helmet according to claim 1, characterized in that the locking piece is slidably attached to the latching piece.
4. The full-face helmet according to claim 1, characterized in that the locking piece is biased in the direction of the locked position by an elastic member.
5. The locking piece has an engaging projection, and the receiving piece has an engaging recess. A face helmet according to any one of claims 1 to 4, characterized in that when the locking piece is in the locked position, the engaging projection engages with the engaging recess.
6. Each of the locking piece and the latching piece has an engaging projection formed thereon. A face helmet according to any one of claims 1 to 4, characterized in that when the locking piece is in the locked position, the two engaging protrusions engage.