Abstract:
A motorcycle helmet includes a jaw protector pivotably attached to the helmet along opposite sides thereof. The jaw protector is provided with at least one releasable lock fixing the jaw protector in a lowered use position. The lock is deactivated for enabling a pivoting of the jaw protector to a raised position.

Description:
FIELD OF THE INVENTION 
     The invention relates to a jaw protecting apparatus of helmet so as to stabilize a feeling of wearing by smoothly moving up and down a jaw protection, which is installed in front of the helmet, and then letting the center of gravity be located in the rear of the helmet, in a helmet which is worn to protect the head of a person taking a motorbicycle. 
     DESCRIPTION OF THE PRIOR ART 
     Generally where a person rides on two wheeled vehicles such as motorbicycles, etc . . . , a rider should necessarily wear a helmet for protecting a head, in order to protect his head. Such helmets are made so as to not obstruct the view of people wearing them due to wind force rising in front of him, and to solve respiratory distress. 
     Meanwhile, conventional helmets installed and used in the same manner as stated above, have jaw protections at their below portions to protect jaws of peoples wearing helmets. This jaw protecting apparatus is made so as to fix the two ends at both sides of the body of the said helmet. A jaw protection fixed at the said helmet, is firmly fixed and installed not to be detached from the helmet. 
     However, a person wearing the helmet can neither talk with the other party nor drink beverage nor smoke. In addition, the same conventional helmet protections as stated above, was made in order for the fixture, the pivot of the gravity center to be firmly installed at the center of said helmet body on the condition that an antishocking member is equipped in the inside of the outer body. 
     Therefore, conventional jaw protections of helmets have a defect that a feeling of wearing helmets is very bad since when wearing the said helmet, the loading of said jaw protection is pressed in the front of the person wearing it. 
     In addition, since the jaw protection of said helmet is fixed on the condition that it is not rotated, when said helmet is put on or taken off, the said jaw protection is being an obstacle and furthermore, has problems, that is to say, it is very inconvenient for a person to wear or take off said helmet. 
     SUMMARY OF THE INVENTION 
     The present invention is devised by considering all problems of the same conventional helmets as stated above, and contriving solutions. The purpose of the present invention is to provide a jaw protecting apparatus of helmet which is designed to stabilize a feeling of wearing a helmet, by smoothly moving up and down the jaw protection which is installed in front of the helmet, to protect the jaw of a person wearing the helmet, and by locating the gravity center of said jaw protection at the back of the helmet, in the helmet which is worn to protect the head of the rider when he rides on a motorbicycle. Hereinafter, the detailed descriptions pursuant to the enclosed drawings, will be provided. 
    
    
     BRIEF DESCRIPTION OF DRAWINGS 
     FIG. 1 is a unilateral cross-sectional view showing the installation state of the first embodiment of the present invention. 
     FIG. 2 is a cross-sectional view showing the state of the helmet jaw protection when the helmet jaw protection of the first embodiment of the present invention is fixed. 
     FIG. 3 is a cross-sectional view showing the state where the helmet jaw protection of the first embodiment of the present invention is moved up. 
     FIG. 4 is a lateral view showing the state where the helmet jaw protection of the first embodiment of the present invention is installed. 
     FIG. 5 is a unilateral cross-sectional view showing the state of the installation of the second embodiment of the present invention. 
     FIG. 6 is a cross-sectional view showing the state where the helmet jaw protection of the second embodiment of the present invention is fixed. 
     FIG. 7 is a cross-sectional view showing the stated where the helmet jaw protection of the second embodiment of the present invention is moved up. 
     FIG. 8 is a lateral view showing the state where the jaw protection of the second embodiment of the present invention is installed. 
    
    
     &lt;The Explanation of Signs of the Main Portion of Drawings&gt; 
     
       
         
               
               
               
               
             
           
               
                   
               
             
             
               
                  1. 
                 Helmet body 
                  2. 
                 Opening portion 
               
               
                  3. 
                 Shield 
                  4. 
                 Jaw protection 
               
               
                  5, 501: 
                 Fixture 
                  6, 701: 
                 Guide 
               
               
                  7, 601: 
                 locker 
                  8: 
                 shaft 
               
               
                  9: 
                 Supporter 
                 10, 101: 
                 Rotation member 
               
               
                 11: 
                 Handle 
                 12: 
                 Band 
               
               
                 13, 131: 
                 Rotary link 
                 14, 602: 
                 elongated arcuate slot 
               
               
                   
                   
                   
                 or hole 
               
               
                 15: 
                 Rotary central pivot 
                 16: 
                 Protrusion 
               
               
                 17, 171, 19, 191: 
                 Planetary gear 
                 18: 
                 Fixed pivot 
               
               
                 20: 
                 control bolt 
                 21: 
                 Guider 
               
               
                 22, 221: 
                 Stopper 
                 23: 
                 Spring 
               
               
                 24: 
                 Wire guide 
                 25: 
                 Wire 
               
               
                 26: 
                 Bridging 
                 27: 
                 Extension plate 
               
               
                   
               
             
          
         
       
     
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In having installed a shield ( 3 ) enabled to move up and down in the front opening portion ( 2 ) of a helmet body ( 1 ) and a jaw protection ( 4 ) equipped with an antishocking member in the front of the lower portion of a shield ( 3 ), a fixture ( 5 ) having bridgings at both side ends of the said helmet body ( 1 ) is installed and a locker ( 7 ), which is supported on each of guide ( 6 ) at the two-sides of said jaw protection ( 4 ), and then turns on the center of pivot ( 8 ), is oppositely installed. 
     A supporter ( 9 ) is installed inside of the front of said jaw protecting apparatus ( 4 ), and a rotation member wherein a handle ( 11 ) is formed thereto, is installed so as to enable to rotate. At said rotation member ( 10 ), the central portion of a band ( 12 ) connected to said lockers ( 7 ), is fixedly install, thereby lockers ( 7 ) connected to a band ( 12 ) according to the rotation member ( 10 ), are rotated. And subsequently, the lockers are locked at said fixture ( 5 ), at the time of their rotation. 
     A rotary link ( 13 ) wherein an elongated slot in the form of a circular arc ( 14 ) is provided, is installed at the upper portion of the protecting apparatus ( 4 ). At this rotary link ( 13 ), a rotary central pivot ( 15 ) wherein a protrusion is formed and a planetary gear ( 17 ) are installed and at a pivot ( 18 ) of a central shield ( 3 ) of the helmet body ( 1 ), a second planetary gear ( 19 ) engaging with the first planetary gear ( 17 ) is installed. At an upper portion of the pivot ( 18 ), a control bolt ( 20 ) and a guider ( 21 ) are formed respectively, and the control bolt ( 20 ) is installed in a manner that it may be inserted into the arcuate slot ( 14 ) of the rotary link ( 13 ) and that the rotary central pivot ( 15 ) may be inserted at the guider ( 21 ) and that a stopper ( 22 ) may be fixed on the jaw protection assembly at a location below the fixed pivot ( 18 ). 
     In addition, in the one direction of a fixture ( 501 ) having a bridging, as in FIG. 5 to FIG. 8, a guide ( 701 ) is installed and a locker or locking element ( 601 ) which is elastically installed with a spring ( 23 ) at this guide ( 701 ), is installed in such a manner that it may slide along a guide slot ( 602 ) and in a state where the one end of a wire ( 25 ) guided by a wire guide ( 24 ) at the inner side end of the jaw protection ( 4 ), is fixed, this wire ( 25 ) is coupled to a rotation member ( 101 ), and the other end of the wire ( 25 ) is installed by sticking it to the locker ( 601 ). 
     In the rear of said jaw protecting apparatus ( 4 ), a rotary link ( 131 ) having a planetary gear ( 171 ) is installed, and a planetary gear ( 191 ) is engaged with said planetary gear ( 171 ). In this context, this planetary gear ( 19 ) is installed in such a manner that the gear is controlled by a stopper ( 221 ) controlled by a bridging ( 26 ) and a resilient plate ( 27 ). 
     Hereinafter, we are explaining the status of action of the present invention composed as described above. 
     In having installed a shield ( 3 ), which is movable up and down, at the front opening portion ( 2 ) of said helmet body ( 1 ) and a jaw protection ( 4 ) equipped with an anti-shocking material at the front lower portion of the shield ( 3 ), a fixture ( 5 ) having bridgings at both side ends of said helmet body ( 1 ) is installed and a locker ( 7 ) which is supported on each guide ( 6 ) at two sides of the said jaw protection ( 4 ), and which turns on a axis ( 8 ), is oppositely installed. Under the condition that a rotation member ( 10 ) wherein a handle ( 11 ) is formed at a supporter ( 9 ) in the inner front side of said jaw protection ( 4 ), and which is allowed to turn, is installed, 
     the central portion of a band ( 12 ) connecting to said lockers ( 7 ) is fixedly installed. Therefore, according to a rotation of a rotation member ( 10 ), lockers ( 7 ) connected to a band ( 12 ) is rotated. When the lockers are rotated, they are locked at said fixture  5 ). If a handle ( 11 ) of said rotation part ( 10 ) is pressed, said rotation member ( 10 ) is rotated and at the same time, the band ( 12 ) fixed thereto, will become pulled. According as this band ( 12 ) is pulled, said locker ( 7 ) turns on a shaft ( 8 ), and is detached from a fixture ( 5 ) The detachment of this locker ( 7 ) allows the up movement of said jaw protection ( 4 ). If said jaw protection ( 4 ), which was moved up, is moved down, said locker ( 7 ) will be moved down according to the slant portion of the fixture ( 5 ) and at the same time, it is suspended on the fixture ( 5 ). Therefore, said jaw protection ( 4 ) becomes fixed. 
     In addition, a rotation link ( 13 ) is installed, wherein a rotary central pivot ( 15 ) is formed, and wherein a circular arc slot ( 14 ) and a protrusion ( 16 ) are provided on the upper portion of the jaw protection assembly. At this rotation link ( 13 ), a planetary gear ( 17 ) is installed and at the same time, it is connected to and installed at a fixed pivot ( 18 ). In this context, the planetary gear ( 17 ) is installed in order for it to go in gear with a second planetary gear ( 19 ) installed at the fixed pivot ( 18 ). By doing so, at the time the jaw protection assembly ( 4 ) is moved up, the center of rotation of the jaw protection assembly ( 4 ) is allowed to be located at the back of the fixed pivot ( 18 ). Subsequently, by inserting and installing an arcuate slot ( 14 ) and a rotation center pivot ( 15 ) of the rotation link ( 13 ) at a control bolt ( 20 ) and a guider ( 21 ), which is fixed to the jaw protection assembly at a location above the fixed pivot ( 18 ), the rotation link ( 13 ) is allowed to be smoothly rotated. In addition, after the rotation link ( 13 ) is opened and rotated, a stopper ( 22 ) which is fixed to the jaw protection assembly at a location below the fixed pivot ( 18 ), leads to the suppression of reverse rotation. The protrusion ( 16 ) of the rotation center pivot ( 15 ) inserted and installed at the guider ( 21 ), controls the scope of rotation of the rotation link ( 13 ). 
     Additionally, if the invention is realized as embodiments shown in FIGS. 5 to  8 , when a person wishes to open a jaw protection assembly or device ( 4 ), a rotation member ( 101 ) connected to a wire ( 25 ) needs to be pulled. In this context, if this rotation member ( 101 ) is pulled, wire ( 25 ) connected thereto will pull a locker or locking element ( 601 ) installed at a guide ( 701 ). The locker ( 601 ) slides in a slot ( 602 ) formed in the guide ( 701 ) and is detached from a fixture ( 501 ) having said bridging and subsequently, the jaw protection device can be opened. 
     If said jaw protection ( 4 ) is moved down just as it is when said opened jaw protection ( 4 ) is closed, said locker ( 601 ) is under the resilience of a spring ( 23 ) and at the same time, the slant portion formed in one direction, leads to be hung on said fixture ( 501 ). 
     When a jaw protection ( 4 ) is opened and closed as stated above, a rotation link ( 131 ) having a planetary gear ( 171 ) which is installed at the back of said jaw protection ( 4 ) rotates according to the replacement and combination of the rotation link ( 131 ) with a planetary gear ( 191 ). When such rotation is made, a planetary gear ( 19 ) is controlled by a stopper ( 221 ) which is controlled by a bridging ( 26 ) and a resilient plate ( 27 ). Such action can prevent it from moving down by itself by small power where the jaw protection is moved up at maximum. 
     The present invention as stated above is to allow a jaw protection ( 4 ) installed in the lower front portion of a helmet body ( 1 ) to move up and down, thereby only the jaw protection is permitted to be rotated and moved upwardly on the state where a rider wears said helmet. Eventually, the present enables the motorcyclist to a person to freely talk with another person and to drink and smoke. 
     And, the present invention provide the prevention of the flow of the jaw protection by moving up and down said jaw protection, and by fixedly maintaining the fixation condition. 
     In addition, the rotation gravity of said jaw protection should be located at the back of a fixed pivot of a shield, the center portion of the helmet and therefore, the loading of the gravity center of said jaw protection may not bias the front side of the helmet and the transfer of the gravity center may allow the whole weight and loading of the helmet, when said helmet is worn, to be at work evenly in the head of the wearer. By doing so, a feeling of wearing the helmet can be stabilized.