| Helmet having removable jaw guard -> Monitor Keywords |
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Helmet having removable jaw guardRelated Patent Categories: Apparel, Guard Or Protector, For Wearer's Head, And FaceHelmet having removable jaw guard description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070124852, Helmet having removable jaw guard. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a helmet having a removable jaw guard, and more specifically to a helmet having a removable jaw guard in which the locking mechanism of the jaw guard is improved so that open/close operation is further facilitated and the helmet can be taken off without damage in case of emergency. [0003] 2. Description of the Related Art [0004] In general, motorcycle riders must wear a safety helmet to protect the head and the front of helmet should have a shield installed to prevent sight obstruction and breathing difficulty due to the wind blowing from front during driving. In such helmets, there is such a kind of helmet of which the jaw guard can be opened and closed. [0005] In order to open and close the jaw guard in such a helmet, it needs a hinge mechanism as well as a locking mechanism for keeping it closed. [0006] As a conventional helmet provided with such devices, there is a patent described below for which the applicant of the present invention filed on Dec. 24, 2003. [0007] Namely, in the Korean Patent Laid-Open No. 10-2005-64696 (2005. Jun. 29) titled "A helmet having a removable jaw guard," a helmet provided with a locking mechanism was disclosed. As shown in FIGS. 1 and 2, the locking mechanism F500 includes a pair of locking brackets F510 which are attached symmetrically to both of the insides of the helmet body F1 and have locking slot F511; sliders F520 on both left and right sides provided such that one end can enter into the locking slot F511 of the locking brackets F510; guide plates F530 attached to the inside of the jaw guard to prevent the breaking away of the sliders F520 while guiding the sliding of them; springs F540 connected between guide plates for the return of the sliders F520; a connecting bar F550 arranged in arc shape along the middle inside of the jaw guard F4 while the both ends are connected to the ends of left and right sliders F520 so as to simultaneously operate the sliders F520 on both left and right sides; and an unlock lever F570 which crosses lengthwise to pull the middle portion of the connecting bar F550 to front, while the upper end of which is connected by the hinge lever F560 to the inside of the jaw guard F4 and the lower end of which is extended downward so as to be partly exposed below the jaw guard F4. [0008] But in the jaw guard of the above patent, opening is possible after the locked slider F520 is completely off the locking slot F511, and because the direction of the slider F520 breaking away does not correspond to the direction of opening the jaw guard, it has a drawback that locking is not released unless the unlock lever F570 is operated all the way to the end. [0009] Such a drawback has a problem that the helmet cannot be taken off the wearer unless the helmet is broken in case of accident. [0010] Also, the conventional jaw guard is manufactured with a certain amount of weight to ensure sufficient durability, so sometimes opening cannot be maintained by the hooking mechanism alone for control of pivot angle when it was rotated upward, necessitating additionally a stop means at the position opened and lifted to the maximum. SUMMARY OF THE INVENTION [0011] Accordingly, it is an object of the present invention to provide a helmet having a removable jaw guard which can be taken off without breaking the helmet in case of emergency, by providing it with a hinge mechanism for preventing slipping down when opened by providing a separate auxiliary hooking jaw and rotating it upward, and a locking mechanism for releasing more easily the locking of the locking latch in the opening direction of the jaw guard. [0012] In accordance with the present invention, there is provided a helmet having a removable jaw guard which is opened and closed by a hinge means for protecting the wearer by covering part of an opening of a helmet body, and which has a locking means for maintaining the locking condition, the locking means comprising: a pair of left and right locking brackets attached symmetrically to both insides of the helmet body and having locking bars respectively; latches on both the left and right sides engaged with the locking bars of the locking brackets; latch plates on which the latches are fitted rotatably at a predetermined angle by a pivot; a return spring of which one end is connected to the upper end of the latch and the other end is connected to the latch plate so as to return latches to the original position when unlocked; a connecting bar in which the extending portions of both ends are connected to the ends of latches and are arranged in arc shape along the front inside of the jaw guard in order to operate simultaneously the latches on both the left and right sides; and an unlock lever which is crossed longitudinally to pull the middle of the connecting bar forward, and of which the upper end is connected to the inside of the jaw guard by a hinge lever and the lower end is extended downward to be partly exposed below the jaw guard. [0013] Preferably, the hook of the latch rotates within a predetermined range of angle around the pivot, and rotates upward in the direction of the rotation of the jaw guard during unlocking. [0014] Preferably, the hinge means comprising hinge holes formed on the side of the helmet body corresponding to the shaft holes formed on the left and right extending portions of the jaw guard, hooking protuberances formed on the inside of the shaft holes, support holes formed in the hinge holes, and a screw shaft inserted into the hinge holes 1a to maintain open condition. BRIEF DESCRIPTION OF THE DRAWINGS [0015] Other objects and aspects of the present invention will become apparent from the following description of embodiments with reference to the accompanying drawings in which: [0016] FIG. 1 is a perspective view showing a conventional removable jaw guard; [0017] FIG. 2 is a longitudinal sectional view of a helmet showing the installation of the conventional removable jaw guard. [0018] FIG. 3 is a perspective view showing a helmet having a removable jaw guard according to the present invention; [0019] FIG. 4 is an exploded perspective view showing the main configuration of the removable jaw guard according to the present invention; [0020] FIG. 5 is a partially sectional view of a helmet showing the installation of the removable jaw guard according to the present invention; [0021] FIG. 6 is an enlarged sectional view showing the locking of the removable jaw guard according to the present invention; Continue reading about Helmet having removable jaw guard... Full patent description for Helmet having removable jaw guard Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Helmet having removable jaw guard patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. 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