Full-face helmet

Abstract

The present invention addresses the problem of providing a full-face helmet in which shield retention is not easily released by impact.　A full-face helmet 1 comprises: a full-face-type helmet shell 2; a shield 3 for opening / closing the front opening of the helmet shell 2; and a retention device for retaining a closed state of the shield 3. The full-face helmet is characterized in that: the shield 3 is supported by right and left independent or combined shafts so as to be turnable with respect to the helmet shell 2; the retention device is provided to an upper portion of a chin guard part of the helmet shell 2, and has a latch piece 41 for latching the shield 3; the latch piece 41 is attached to the helmet shell 2 by means of a fixation member 82; and an elastic member 83 is interposed between the inner surface of the helmet shell 2 and the fixation member 82.

Description

Full-face helmet

[0001] The present invention relates to a full-face helmet, and particularly to a full-face helmet provided with a holding means for holding a shield in a closed state.

[0002] Conventionally, there has been known a full-face helmet provided with a holding means for holding an openable / closable shield that covers the front opening of the cap body of the full-face helmet in a closed state. (Patent Documents 1 to 2)

[0003] Japanese Utility Model Laid-Open No. 5-62528, Japanese Patent Laid-Open No. 2021-110058

[0004] The full-face helmet described in the above Patent Document 1 includes a lock mechanism that locks the lock lever through engagement or fitting by sliding or rotating the lock lever. The full-face helmet disclosed in the above Patent Document 2 is provided with a holding device that holds the shield by latching a latched piece of the shield to a latching piece of the cap body. In the full-face helmets described in Patent Documents 1 and 2, there has been a problem that the holding may be easily released depending on the direction and magnitude of an impact applied to the lock mechanism or the full-face helmet.

[0005] Therefore, an object of the present invention is to solve the above problem and provide a full-face helmet in which the holding of the shield is not easily released by an impact.

[0006] In order to solve the above problems, the present invention has the following configuration. A full-face helmet comprising: a full-face type cap body; a shield that opens and closes a front opening of the cap body; and a holding device that holds the shield in a closed state, wherein the shield is rotatably supported relative to the cap body by one or a combination of left and right shafts, the holding device is provided at an upper portion of a chin guard portion of the cap body and has a latching piece for latching the shield, the latching piece is attached to the cap body by a fixing member, and an elastic member is sandwiched between an inner surface of the cap body and the fixing member.

[0007] The full-face helmet of the present invention has a latching piece provided on the upper part of the chin guard portion of the helmet body for latching the shield, the latching piece is attached to the helmet body by a fastening member, and an elastic member is sandwiched between the inner surface of the helmet body and the fastening member. As a result, even if an impact is applied to the helmet body, the impact is absorbed by the elastic member, reducing the impact applied to the latching piece, and providing a full-face helmet in which the shield is not easily released.

[0008] This is a side view of the full-face helmet 1 according to Embodiment 1 of the present invention. This is a diagram showing the latching piece 41 according to Embodiment 1 of the present invention. This is a diagram showing the latched piece 42 according to Embodiment 1 of the present invention. This is a diagram showing the locking piece 43 according to Embodiment 1 of the present invention. This is a diagram showing the latching piece 41 according to Embodiment 1 of the present invention. This is a diagram showing the latching piece 41 and locking piece 43 according to Embodiment 1 of the present invention. This is a diagram showing the spring 44 according to Embodiment 1 of the present invention. This is a diagram showing the mounting structure of the latching piece 41 according to Embodiment 1 of the present invention. This is a diagram showing the operation of the retaining device 4 according to Embodiment 1 of the present invention. This is a diagram showing the closing operation of the retaining device 4 according to Embodiment 1 of the present invention. This is a diagram showing the opening operation of the retaining device 4 according to Embodiment 1 of the present invention. This is a side view of the full-face helmet 1 according to Embodiment 2 of the present invention. This is a diagram showing the latching piece 61 according to Embodiment 2 of the present invention. This is a diagram showing the latching piece fixing plate 62 according to Embodiment 2 of the present invention. This is a diagram showing the mounting of Embodiment 2 of the present invention. This is a diagram showing the mounting structure of the latching piece 61 according to Embodiment 2 of the present invention.

[0009] [Embodiment 1] Embodiment 1 of the present invention will be described in detail with reference to the drawings. In this specification, the direction of the wearer's face is referred to as front, the opposite side as back, the left side when facing forward as left, the right side as right, the direction of the top of the head as up, and the opposite side as down.

[0010] [Overall Configuration] Figure 1 is a view from the left of a full-face helmet 1 according to Embodiment 1 of the present invention, where (a) is the open state of the shield 3, (b) is the state in which the fastening piece 42 is fastened to the fastening piece 41 and the locking piece 43 is unlocked, and (c) is the state in which the fastening piece 42 is fastened to the fastening piece 41 and the locking piece 43 is locked. The full-face helmet 1 has a helmet body 2 molded into a full-face shape, a shield 3 that opens and closes the front opening 21 of the helmet body 2, and a holding device 4 that holds the shield 3 in the closed state.

[0011] [Helmet Shell] The helmet shell 2 is a known helmet shell and consists of a shell molded from resin or fiber-reinforced resin (glass fiber reinforced resin, carbon fiber reinforced resin, etc.), an impact-absorbing liner made of expanded polystyrene, etc., attached to the inside of the shell, and interior pads placed inside the impact-absorbing liner. Chin straps (not shown) for securing the full-face helmet 1 to the wearer's head are attached to the inner surfaces of the left and right sides near the lower opening of the helmet shell 2. The front of the helmet shell 2 is provided with a front opening 21 to expose a part of the wearer's face, and a chin guard portion 22 is formed below it to protect the area around the chin. Sealing rubber (not shown) is attached around the entire circumference of the inner peripheral edge 21a of the front opening 21, and is configured to maintain airtightness by being in close contact with the inner surface of the shield 3 when the shield 3 is closed. Shield support members 23 that rotatably support the shield 3 are attached to both the left and right sides of the front opening 21.

[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 body 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 holding 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 hooked 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 hooked piece 42 of the holding device 4 are attached near the left-right center of the chin guard portion 22 and the shield 3, respectively, but 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 for attachment to the chin guard portion 22 are formed on both the left and right sides. The latching projection portion 41b is formed in the left and right center of the fixing plate portion 41a so as to protrude forward when attached to the chin guard portion 22. The latching protrusion portion 41c is integrally formed below the latching projection portion 41b. The latching projection 41c may be attached to 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.

[0015] Figure 3 shows a locking piece 42 of Embodiment 1 according to the present invention. The upper left is a top view, the upper right is a perspective view, the lower left is a front view, the middle right is a left view, and the lower right is a perspective view. The locking piece 42 has an attachment portion 42a at the top and a locking portion 42b at the bottom, and connecting portions 42c connecting the left and right sides of the attachment portion 42a and the locking portion 42b are integrally molded from metal or resin. A locking opening 42d is formed in the center of the locking piece 42 by the attachment portion 42a, the locking portion 42b, and the connecting portions 42c. When viewed from the side, the locking piece 42 is formed in the shape of a thin plate. An engaging projection 42e is formed near the boundary between the locking portion 42b and the left and right connecting portions 42c. This engaging projection 42e is the point that 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. The upper left figure is a top view, the upper right figure is a perspective view, the lower left figure is a front view, the middle right figure is a left view, and the lower right figure is 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. A locking opening 43d is formed in the center of the locking piece 43 by these pivot shaft portion 43a, locking portion 43b, and support portion 43c. 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 projections 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 holding device 4 in Embodiment 1 of the present invention. Figure 6 is a diagram showing the latching piece 41 and locking piece 43, which are part of the holding device 4 in Embodiment 1 of the present invention, where (a) shows the unlocked state (unlocked state) of the locking piece 43, and (b) shows the locked state of the locking piece 43, with the top diagram being a perspective view, the middle diagram being a view from the front, and the bottom diagram being a view from the left. Figure 7 is a diagram showing the spring 44 in Embodiment 1 of the present invention. 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 the latching portion 411 and the base portion 412, and the latching projection 41b and the 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] In this embodiment 1, as shown in Figures 6 and 7, a spring 44 is interposed between the latching piece 41 and the locking piece 43 to bias the locking piece 43 into a locked state. 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, one torsion spring may be used, or any known spring may be appropriately selected and used. With the pivot shaft portion 43a of the lock piece 43, to which the spring 44 is attached, 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 bolts 81 and nuts 82 (fixing members) described later, and the latch piece 41 and lock piece 43 are fixed to the helmet body 2 in the assembled state shown in Figure 6.

[0019] Figure 8 shows the mounting structure of the fastening piece 41 to the helmet body 2 according to Embodiment 1 of the present invention, where (a) is a side view and a partially enlarged cross-sectional view, and (b) is a view of the helmet body 2 from the inside. As described above, when attaching the fastening piece 41 to the helmet body 2 with a bolt 81 and a nut 82, a rubber sheet 83 (elastic member) is sandwiched between the nut 82 and the inner surface of the helmet body 2. As shown in the cross-sectional view of Figure 8(a), the nut 82, rubber sheet 83, helmet body 2, fastening piece 41, and bolt 81 are arranged in that order from the inner surface side of the helmet body 2. In this embodiment 1, when an impact is applied to the helmet shell 2, particularly when the impact is applied in the direction from the outer surface to the inner surface of the helmet shell 2 (in this embodiment 1, the direction from front to back), the impact is transmitted from the helmet shell 2 to the latching piece 41 via the bolt 81 and nut 82, causing the locking piece 43 to be released or the latched piece 42 to detach from the latching piece 41, which can cause the shield 3 to open. However, in this embodiment 1, by sandwiching a rubber sheet 83 between the inner surface of the helmet shell 2 and the nut 82, a portion of the impact is absorbed by the rubber sheet 83, reducing the impact applied to the latching piece 41, which prevents the locking piece 43 from being released or the latched piece 42 from detaching from the latching piece 41, thus preventing the shield 3 from opening.

[0020] In this embodiment 1, a rubber sheet 83 with a diameter slightly larger than the diameter of the nut 82 is used so that one rubber sheet 83 is placed for each of the two sets of bolts 81 and nuts 82. However, a larger rubber sheet 83 can also be used so that one rubber sheet 83 is placed for each of the two sets of bolts 81 and nuts 82. Alternatively, a rubber sheet may be sandwiched between the outer surface of the helmet shell 2 and the latching piece 41. In this case, a portion of the impact transmitted directly from the helmet shell 2 to the latching piece 41 is absorbed by the rubber sheet 83, reducing the impact applied to the latching piece 41. This prevents the locking piece 43 from being released, or even prevents the latched piece 42 from coming off the latching piece 41, thus preventing the shield 3 from opening. Furthermore, the elastic member sandwiched between the helmet shell 2 and the nut 82, and between the helmet shell 2 and the latching piece 41, is not limited to an elastic body such as an elastic sheet like the rubber sheet 83. Any structure that can absorb the impact from the helmet shell 2 to the nut 82 and from the helmet shell 2 to the latching piece 41 may be used.

[0021] Figure 9 shows the operation of the holding device 4 of Embodiment 1 according to the present invention, where (a) shows the operating range of the locking piece 43, and (b) shows the engagement state of the engaging projection 42e of the hooked piece 42 and the engaging projection 43e 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 portion 41d of the hooked piece 41. As will be described later, the locking piece 43 is in an unlocked state when rotated downward and in a locked state when rotated upward. The locking piece 43 also rotates (moves) between an upper locked position and a lower unlocked position (unlocked position) such that the inner circumferential surface of the lock opening 43d is aligned with the outside of the outer surface of the hooking projection 41b. As shown in Figure 9(b), when the shield 3 is closed, the hooked portion 42b of the hooked piece 42 engages with the hooking projection 41c of the hooked piece 41. Furthermore, when the locking piece 43 is in the locked state, the engaging projection 42e of the latched piece 42 engages with the engaging projection 43e of the locking piece 43.

[0022] [Holding Operation] Figure 10 shows the holding operation (closing operation) of the holding device 4 of Embodiment 1 according to the present invention, and the holding operation proceeds in the order of (a), (b), (c), and (d). The latching piece 42 is attached to the outer surface of the shield 3 so as to protrude downward from the lower edge near the left and right center of the shield 3, and when the shield 3 is closed, the latching piece 42 can be latched onto the latching piece 41. As shown in Figure 10(a), from the open state of the shield 3, the upper mounting portion 42a of the latching piece 42 is pushed downward with a finger (for example, one index finger) to move the shield 3 to the closed state so that the latching opening 42d of the latching piece 42 fits onto the latching projection 41b of the latching piece 41. At this time, the locking piece 43 is in the upper locked position by the spring 44. As shown in Figure 10(b), the lower surface of the engaging projection 42e of the retained piece 42 contacts the upper surface of the locking portion 43b of the locking piece 43 in the locked position from above. As shown in Figure 10(c), as the retained piece 42 is further pushed downward, the locking piece 43 is pushed downward in the direction of 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 42e 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 10(d), when the locking piece 43 rotates to the locked position, the engaging projection 43e of the locking piece 43 passes over the engaging projection 42e of the retained piece 42, and the lower surface of the engaging projection 43e and the upper surface of the engaging projection 42e engage. (See also Figure 9(b)) At this time, the hooked portion 42b of the hooked piece 42 moves to the rear side of the hooking projection 41c of the hooked piece 41, and the front surface of the hooked portion 42b engages with the rear surface of the hooking projection 41c.

[0023] Even when the hooked portion 42b of the hooked piece 42 is hooked onto the hooked projection 41c of the hooked 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 the closed state. When the shield 3 is in the open state, the locking piece 43 is in a locked position rotated upward. When the locking piece 43 is in the locked position, when closing the shield 3 and fitting the hooked piece 42 onto the hooked piece 41, the locking piece 43 can be pushed downward by the hooked piece 42 as described above, and the locking piece 43 does not interfere with the operation of hooking the hooked piece 42 onto the hooked piece 41. Furthermore, in this embodiment 1, 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 embodiment 1, the shield 3 can be locked in the closed position with only one action: pushing down the retained piece 42 and engaging it with the retaining piece 41. As described above, this embodiment 1 can achieve the effect of locking the shield 3 more reliably with a simple operation.

[0024] [Release Operation] Figure 11 shows the release operation (opening operation) of the retaining device 4 of Embodiment 1 of the present invention, and the release operation proceeds in the order of (a), (b), and (c). As shown in Figure 11(a), in the locked state of the shield 3, the engaging projection 42e of the retained piece 42 is engaged with the engaging projection 43e of the locking piece 43, and the retained portion 42b of the retained piece 42 is engaged with the engaging projection 41c of the retaining 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 43e pushes the engaging projection 42e downward, and the engagement between the two is released. At this time, the engaging projection 42e, i.e., the retained piece 42, is pushed down, and the shield 3 is biased in the opening direction by the sealing rubber attached to the entire circumference of the inner edge 21a of the front opening 21 of the helmet body 2. As a result, the engagement between the retained portion 42b of the retained piece 42 and the retaining projection 41c of the retaining piece 41 is released, and the retained piece 42 moves slightly forward. As shown in Figure 11(b), the upper surface of the engaging projection 43e of the pushed-down locking piece 43 comes into contact with the lower surface of the engaging projection 42e of the retained piece 42 that has moved forward, preventing the locking piece 43 from moving to the upper locked position by the spring 44. As shown in Figure 11(c), with the engaging projection 43e in contact with the engaging projection 42e 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.

[0025] In this embodiment 1, 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 43e of the locking piece 43 comes into contact with the engaging projection 42e of the retained 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 opening operation of the shield 3 can be easily performed with only two actions: rotating the locking piece 43 to the unlocked position and pulling up the retained piece 42. As described above, this embodiment 2 can achieve the effect of making it easier to release the more securely locked shield 3 and open it.

[0026] [Embodiment 2] Embodiment 2 of the present invention will be described in detail with reference to the drawings. Embodiment 2 differs from Embodiment 1 in its holding device.

[0027] [Overall Configuration] Figure 12 is a view from the left of the full-face helmet 1 of Embodiment 2 according to the present invention, where (a) and (b) show the shield 3 in the open state, and (c) shows the shield 3 in the closed state. The full-face helmet 1 has a helmet shell 2 molded into a full-face shape, a shield 3 that opens and closes the front opening 21 of the helmet shell 2, and a holding device 6 that holds the shield 3 in the closed state. The helmet shell 2 and shield 3 have the same configuration as in Embodiment 1, so a detailed explanation is omitted.

[0028] [Holding device] The holding device 6 has a latching piece 61 and a latching piece fixing plate 62. In this embodiment 2, the latching piece 61 and the latching piece fixing plate 62 of the holding device 6 are attached near the left end of the chin guard portion 22, but 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.

[0029] Figure 13 shows the fastening piece 61 of Embodiment 2 according to the present invention, with the left side view (viewed from the front when attached to the helmet body 2), the upper right view (viewed from the left), the middle right view (viewed from below), and the lower right view (viewed from the right). Figure 14 shows the fastening piece fixing plate 62 of Embodiment 2 according to the present invention, with the upper left view (viewed from above when attached to the helmet body 2), the lower left view (viewed from the left when attached to the helmet body 2), and the lower right view (viewed from the rear). Figure 15 shows the attachment of the fastening piece 61 of Embodiment 2 according to the present invention. Figure 16 shows the attachment structure of the fastening piece 61 to the helmet body 2 of Embodiment 2 according to the present invention, with (a) being a side view (including a partially enlarged view) and a partially enlarged cross-sectional view, and (b) being a view of the helmet body 2 from the inside.

[0030] The latching piece 61 has a pivot portion 61a, an operating portion 61b, and a latching portion 61c. The latching piece 61 rotates around the pivot portion 61a between a locked position and an unlocked position. An operating portion 61b for operating the latching piece 61 with a finger is formed on the front side of the pivot portion 61a, and a latching portion 61c for locking the shield 3 in the closed state is formed on the rear side. The latching piece fixing plate 62 is a member that is installed between the latching piece 61 and the helmet body 2 to fix the latching piece 61 to the helmet body 2, and has a plate-shaped member plate portion 62a, a shaft hole 62b concentric with the pivot portion 61a of the latching piece 61 and a pin hole 62c concentric with the engagement pin portion 84a (described later) formed on the plate portion 62a, and a projection 62d formed on the rear end edge of the plate portion 62a.

[0031] As shown in Figure 15, the latching piece 61 and the latching piece fixing plate 62 are attached to the chin guard portion 22 of the helmet body 2 by bolts 81 and nuts 82 (fastening members) and bolts 84 and nuts 82 (fastening members). The latching piece fixing plate 62 and the latching piece 61 are stacked on the outer surface of the helmet body 2 in that order. The bolt 81 is inserted through the pivot portion 61a of the latching piece 61 and the pivot hole 62b of the latching piece fixing plate 62. A rubber sheet 83 (elastic member) is placed on the inner surface of the helmet body 2, and the bolt 81 is inserted through the rubber sheet 83, and the bolt 81 and nut 82 are fastened together. In addition, a bolt 84 is inserted through the pin hole 62c of the latching piece fixing plate 62, and a rubber sheet 83 (elastic member) is placed on the inner surface of the helmet body 2, and the bolt 84 is inserted through the rubber sheet 83, and the bolt 84 and nut 82 are fastened together. The latching piece fixing plate 62 is fixed to the helmet body 2 at two points by two fastening members: a bolt 81 and a nut 82, and a bolt 84 and a nut 82. The latching piece 61 is pivotally supported on the bolt 81 and rotates (moves) between a locked position that locks the shield 3 in the closed position and an unlocked position that releases the shield 3, as will be described later.

[0032] A protruding engagement pin portion 84a is formed on the head of the bolt 84. The shield 3 has an engagement hole 3a that engages with the engagement pin portion 84a when closed. The coil portion of a torsion spring 63 is fitted onto the pivot portion 61a of the latching piece 61, with one end of the torsion spring 63 extending toward the operating portion 61b and the other end engaging with the projection 62d of the latching piece fixing plate 62 (see Figure 13). This torsion spring 63 biases the latching piece 61 to rotate counterclockwise (towards the locked position) when viewed from the outside of the helmet body 2 (in the direction in which the operating portion 61b moves away from the upper shield 3, and in the direction in which the latching portion 61c contacts the upper shield 3). When the shield 3 is open, the latching piece 61 stops at a position where the latching portion 61c contacts the engagement pin portion 84a, as shown in Figures 12(a) and (b).

[0033] As described above, when attaching the latching piece 61 and the latching piece fixing plate 62 to the helmet body 2 with bolts 81 and nuts 82, and bolts 84 and nuts 82, a rubber sheet 83 is placed between the nut 82 and the inner surface of the helmet body 2. As shown in the cross-sectional view of Figure 16(a), the arrangement from the inner surface side of the helmet body 2 is in the order of nut 82, rubber sheet 83, helmet body 2, latching piece fixing plate 62, latching piece 61, and bolt 81, and from the inner surface side of the helmet body 2 is in the order of nut 82, rubber sheet 83, helmet body 2, latching piece fixing plate 62, and bolt 84. When an impact is applied to the helmet shell 2 in the direction from the outer surface toward the inner surface (in this embodiment 2, from left to right), the impact is transmitted from the helmet shell 2 to the latching piece 61 and latching piece fixing plate 62 via bolts 81 and nut 82, and bolts 84 and nut 82. This can cause the latching piece 61 to rotate, the engagement hole 3a to disengage from the engagement pin portion 84a, and the shield 3 to open. However, as in this embodiment 2, by sandwiching a rubber sheet 83 between the inner surface of the helmet shell 2 and the nut 82, a portion of the impact is absorbed by the rubber sheet 83, reducing the impact applied to the latching piece 61 and latching piece fixing plate 62. This prevents the latching piece 61 from rotating, the engagement hole 3a from disengaging from the engagement pin portion 84a, and the shield 3 from opening.

[0034] In this embodiment 2, a rubber sheet 83 with a diameter slightly larger than the diameter of the nut 82 is used so that one rubber sheet 83 is placed on each of the bolt 81 and nut 82 and bolt 84 and nut 82. However, a larger rubber sheet 83 can also be used so that one rubber sheet 83 is placed on each of the bolt 81 and nut 82 and bolt 84 and nut 82. Alternatively, a rubber sheet may be sandwiched between the outer surface of the helmet shell 2 and the fastening piece fixing plate 62. In this case, a portion of the impact transmitted directly from the helmet shell 2 to the fastening piece fixing plate 62 is absorbed by the rubber sheet, reducing the impact applied to the fastening piece fixing plate 62, which prevents the fastening piece 61 from rotating, the engagement hole 3a from disengaging from the engagement pin portion 84a, and the shield 3 from opening. Furthermore, the elastic members sandwiched between the helmet shell 2 and the nut 82, and between the helmet shell 2 and the fastening plate 62, are not limited to elastic materials such as elastic sheets like the rubber sheet 83, but can be any material that can absorb the impact from the helmet shell 2 to the nut 82 and the impact from the helmet shell 2 to the fastening plate 62.

[0035] [Holding Operation] When the shield 3, which is in the open position as shown in Figures 12(a) and (b), is moved in the closing direction (downward), the lower edge of the shield 3 bulges outward due to the engagement pin portion 84a and comes into contact with the locking portion 61c of the locking piece 61 from above, causing the locking portion 61c to rotate clockwise (towards the unlocked position) against the biasing force of the torsion spring 63. When the shield 3 is moved further, as shown in Figure 12(c), the lower edge of the shield 3 goes over the engagement pin portion 84a, and the engagement hole 3a engages with the engagement pin portion 84a. The lower edge of the shield 3 returns inward, and contact with the locking portion 61c is released. Due to the biasing force of the torsion spring 63, the locking piece 61 rotates counterclockwise (towards the locked position), and the locking piece 61 locks the shield 3 so that the locking portion 61c covers the outer surface of the shield 3. The latching piece 61 stops when the latching portion 61c abuts against the engagement pin portion 84a (locked position). By latching the shield 3 from the outside, the latching piece 61 prevents the engagement hole 3a from disengaging from the engagement pin portion 84a, thereby locking the shield 3 in the closed position.

[0036] [Release Operation] By operating the operating part 61b of the locking piece 61 in the locked state as shown in Figure 12(c) with a finger, the locking piece 61 is rotated clockwise (towards the unlocked position) against the biasing force of the torsion spring 63. This causes the locking part 61c to detach from the shield 3, and the upper part of the operating part 61b, which is in contact with the lower edge of the shield 3, pushes the shield 3 upward in the opening direction, causing the engagement hole 3a to disengage from the engagement pin 84a, and the lock is released as shown in Figure 12(b). When the finger that was operating the locking piece 61 is removed, the locking piece 61 rotates in the direction of the locked position (counterclockwise) and stops in the locked position. After that, the shield 3 is rotated by hand to the open state as shown in Figure 12(a).

[0037] As described above, the holding operation of the shield 3 can be easily locked with just one action: pushing the shield 3 down to the closed position by hand. Furthermore, the releasing operation can be easily rotated to the open position with just two actions: rotating the latching piece 61 towards the unlocked position with a finger (for example, a thumb), and then pushing the shield 3 up to the open position by hand.

[0038] Although Embodiments 1 and 2 of the present invention have been described in detail above with reference to the drawings, the specific configurations are not limited to these embodiments, and any design changes, etc., that do not depart from the gist of the present invention are also included. Furthermore, Embodiments 1 and 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.

[0039] 1 Full-face helmet 2 Helmet shell 21 Front opening 21a Inner edge 22 Chin guard 23 Shield support member 3 Shield 3a Engagement hole 4 Retaining device 41 Hooking piece 41a Fixing plate 41b Hooking projection 41c Hooking protrusion 41d Hole 411 Hooking part 411d Hooking part side groove 412 Base 412d Base side groove 42 Hooked piece 42a Mounting part 42b Hooked part 42c Connecting part 42d Hooked opening 42e Engagement protrusion 43 Locking piece 43a Rotating shaft part 43b Locking part 43c Support part 43d Lock opening 43e Engagement protrusion 44 Spring 6 Retaining device 61 Hooking piece 61a Support part 61b Operating part 61c Locking part 62 Locking piece fixing plate 62a Plate part 62b Axle hole 62c Pin hole 62d Projection part 63 Torsion spring 81 Bolt 82 Nut 83 Rubber sheet 84 Bolt 84a Engaging pin part

Claims

1. A full-face helmet comprising a full-face helmet shell, a shield for opening and closing the front opening of the helmet shell, and a retaining device for holding the shield in a closed state, wherein the shield is rotatably supported by left and right single or combined axes relative to the helmet shell, the retaining device is provided on the upper part of the chin guard portion of the helmet shell and has a latching piece for latching the shield, the latching piece is attached to the helmet shell by a fixing member, and an elastic member is sandwiched between the inner surface of the helmet shell and the fixing member.

2. The full-face helmet according to claim 1, wherein the shield is provided at the lower part and has a retaining piece that can be retained with the retaining piece, and a locking piece that prevents the retaining piece retained with the retaining piece from coming off the retaining piece, the locking piece being movably attached to the retaining piece between a locked position and an unlocked position.

3. The full-face helmet according to claim 1, wherein the latching piece is rotatably provided on the helmet body between a locked position and an unlocked position, and the latching piece prevents the shield from disengaging from the helmet body in the locked position.

Images