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[0001] 1. Field of the Invention
[0002] This invention relates to a supporting structure of chin-ventilation shutter for a full-face type helmet.
[0003] 2. Description of the Related Art
[0004] In a full-face type helmet, its shell is formed in a shape of covering a head and a chin portion of a user, and eye opening part is covered by a face shield, fogging may be caused to inner surface of the face shield by accumulating heat inside the helmet in some occasions.
[0005] Thus, as shown in
[0006] The ventilating hole
[0007] At this time, in order to reduce the face shield fogging and accumulation of heat inside the helmet, efficiency of channeling air inside the helmet can be considered by increasing the volume of channeling outside air inside the helmet. As one of methods therefor, it is thought that the volume of channeling outside air is increased by forming a large ventilating hole.
[0008] However, since the size of the chin-ventilation shutter corresponds to the size of the ventilation hole, if the chin-ventilation shutter has a supporting shape of the above-mentioned turning center to be unique, for example, as shown in
[0009] Accordingly, it may be thought that an angle at the time of opening fully the chin-ventilation shutter is lessened and the volume of protruding is lessened. For such a case, the volume of channeling outside air cannot be increased even if the hole of ventilation is widened.
[0010] On the contrary, a method in which the chin-ventilation shutter is opened and closed towards the inside of the helmet can be considered. For this method, the chin-ventilation shutter protrudes widely towards the inside of the helmet, thus a space for the chin-ventilation shutter needs to be kept inside the chin guard portion and such a method may not be adopted actually from a point of view of operability for opening and closing.
[0011] That is to say, there may be certain limit to set a central point for turning the chin-ventilation shutter enabling the volume of channeling outside air.
[0012] The object of the present invention is to provide a supporting structure of a novel structure chin-ventilation shutter to enabling the volume of channeling outside air inside the helmet.
[0013] The technical means thereof is achieved by having a supporting structure of supporting a chin-ventilation shutter for opening and closing a ventilating hole provided in a chin guard of a full-face type helmet about a chin-ventilation shutter supporting part fixed to the shell side, having two or more central points for turning for opening and closing the chin-ventilation shutter, and allowing the aforementioned central portion for turning to switch on the way to which the chin-ventilation shutter performs an opening function from a closing condition to an opening condition. (Claim
[0014]
[0015]
[0016]
[0017]
[0018]
[0019]
[0020]
[0021]
[0022]
[0023]
[0024]
[0025] As a structure for embodying the aforementioned claim
[0026] the aforementioned first guide shaft (S
[0027] According to the supporting structure of the present invention, the first central point P
[0028] The embodiment of the above-mentioned example is the embodiment having two turning center points of the chin-ventilation shutter
[0029] In the drawings, each engaging part is provided in the chin-ventilation shutter
[0030] In claim
[0031] Further, in the case of claim
[0032] a step is provided in the second engaging part (U
[0033] [Preferred Embodiment]
[0034] The embodiment of the present invention is explained hereinafter with reference to drawings.
[0035]
[0036] The full-face type helmet A of the present embodiment is a publicly known embodiment which includes a shock absorbing liner C structured of expanded polystine stylofoam or material having the same kind of absorbing efficiency inside a shell B formed in the predetermined shape by fiber-strengthen resin, an inner pad D of a head portion, which is made of carbamic acid ester provided inside the shock absorbing liner C thereof in an attachable and detachable way, cheek pads DL and DR provided in both sides corresponding to the cheek and chin portions, and a shield E formed in the predetermined form using a resin plate having a transparent or colored transparent property and an elastic property.
[0037] The chin-ventilation shutter
[0038] The chin-ventilation shutter supporter
[0039] The chin-ventilation shutter
[0040] To give an actual example, as shown in FIGS.
[0041] The chin-ventilation shutter
[0042] In the following, the structure for switching the turning central point is explained in detail. As shown in
[0043] The first engaging part U
[0044] A position in which the central point is switched is a position in which a curved portion U
[0045] The opening and closing operation of the chin-ventilation shutter
[0046] First of all, as shown in
[0047] Next, the chin-ventilation shutter
[0048] Then, when the chin-ventilation shutter
[0049] If the chin-ventilation shutter
[0050] Further, for the full open condition, as shown in
[0051] According to the supporting structure of the present embodiment, for the full open condition, it is possible to open the whole region of the ventilating hole
[0052]
[0053] At this stage, engaging parts of
[0054] For the forms of the first engaging part U
[0055] To give an actual example, the radius of an arc C
[0056] That is to say, the turning center point of the arc C
[0057] In this case, there exist plural center points between the first central point P
[0058] Then, while it is ended to turn along the arc C
[0059] Therefore, the turning center points of the chin-ventilation shutter of the aforementioned embodiment have three points, such as the first, second, and third center point, and plural center points existing between the first central point P
[0060] The embodiments of the first engaging part U
[0061] This structure is made such that the turning operation is regulated at the time that each guide shaft touches the curved portion in turning operation of the chin-ventilation shutter. Using this regulation, a ratchet function comes to be effective to the operation of opening the chin-ventilation shutter.
[0062] Further, for this structure, strictly speaking the chin-ventilation shutter cannot move as a turning movement since the chin-ventilation shutter moves along each straight line, but the chin-ventilation shutter performs the movement nearly the same as the turning movement in view of the whole movement of the chin-ventilation shutter.
[0063] That is to say, since it is performed to try to turn by moving along each straight line, a gap is caused during the movement thereof. In general, it can be judged that it is performed to turn about the turning center point of a turning center point P
[0064] Therefore, the embodiment of the present invention has two or more turning center points.
[0065] Although the first engaging part U
[0066] In the following, although the embodiment of the first engaging part and the second engaging part having the channel structure of the present invention are explained hereinafter, reference characters U
[0067] Further, the reference characters S
[0068] For the basic outer shape, the first engaging part U
[0069] The height position of the bottom face U
[0070] The first guide shaft S
[0071] According to the present embodiment, in the same way as the aforementioned embodiment, for the full open condition, the whole area of the ventilating hole
[0072]
[0073] The chin-ventilation shutter
[0074] A first engaging part U
[0075] The flow regulating plate
[0076] The first flow regulating plate
[0077] In accordance with the chin-ventilation shutter
[0078] As described above, the present invention can open, for the full open condition of the chin-ventilation shutter, the whole area of a ventilating hole without letting the top end portion of the chin-ventilation shutter protrude in the outer direction from the surface of the shutter supporter.
[0079] Therefore, it is possible to increase the amount of outside air's channel, also have straightforward visual appearance.
[0080] Further, according to the invention recited in claim
[0081] Further, according to the invention recited in claim
[0082] Having described specific preferred embodiments of the invention with reference to the accompanying drawings, it will be appreciated that the present invention is not limited to those precise embodiments, and that various changes and modifications can be effected therein by one of ordinary skill in the art without departing from the scope of the invention as defined by the appended claims.