Crash helmet that is assembled easily and rapidly
View Patent ↗A crash helmet includes a helmet body, a face mask, and a binding device for attaching the face mask to the helmet body. Thus, the face mask is mounted on and removed from the helmet body easily and rapidly by operation of the binding device, so that the crash helmet is assembled and disassembled easily and rapidly, thereby facilitating a user mounting and dismantling the crash helmet. In addition, the face mask is mounted on the helmet body by the binding device without needing a metallic spring to prevent the crash helmet from being inoperative during a long-term utilization, thereby enhancing the lifetime of the crash helmet.
1. A crash helmet, comprising a helmet body, a face mask, and a binding device for attaching the face mask to the helmet body, wherein
the helmet body has two opposite sides each formed with a mounting cavity;
the face mask has two opposite sides each having an inner face provided with a protruding ring having a periphery formed with two arc-shaped protruding blocks, and a gap is defined between each of the two protruding blocks and the inner face of the face mask;
the binding device is mounted in the mounting cavity of the helmet body and includes a fixed board and a movable board;
the fixed board is formed with a through hole and provided with an elastic positioning arm having an outward extending protruding positioning block;
the movable board has a first face formed with a circular protruding plate received in the through hole of the fixed board;
the movable board has a second face formed with a circular receiving recess having a periphery formed with two opposite arc-shaped receiving grooves and two opposite arc-shaped catch plates;
the protruding ring of the face mask is received in the receiving recess of the movable board, and the two protruding blocks of the face mask are extended through the two receiving grooves of the movable board;
each of the two catch plates of the movable board is locked in the gap of the respective protruding block of the face mask by rotation of the movable board;
the movable board has a side provided with a frame having a side formed with a locking slot lockable on the positioning block of the fixed board by rotation of the movable board.
2. The crash helmet in accordance with claim 1 , wherein the movable board is further provided with an elastic press plate received in the frame and rested on the positioning block of the fixed board.
3. The crash helmet in accordance with claim 1 , wherein the two protruding blocks of the face mask are stopped by the two catch plates of the movable board by rotation of the movable board.
4. The crash helmet in accordance with claim 1 , wherein the helmet body is placed on a user's head.
5. The crash helmet in accordance with claim 1 , wherein the face mask is an arc-shaped transparent plate to shield the user's face.
6. The crash helmet in accordance with claim 1 , wherein:
the fixed board is further provided with an adjusting arm located adjacent to the through hole, the adjusting arm has a face formed with a plurality of adjusting depressions;
the inner face of the face mask is provided with a protruding flange located adjacent to the protruding ring, the protruding flange of the face mask has a first side formed with a protruding edge facing the protruding ring and a second side formed with an arc-shaped locking block;
the protruding edge of the protruding flange of the face mask is movable in the adjusting depressions of the adjusting arm of the fixed board to adjust a position of the face mask.
7. The crash helmet in accordance with claim 6 , wherein the protruding edge of the protruding flange of the face mask is received in an uppermost one of the adjusting depressions of the adjusting arm when the protruding ring of the face mask is received in the receiving recess of the movable board and the two protruding blocks of the face mask are extended through the two receiving grooves of the movable board.
8. The crash helmet in accordance with claim 6 , wherein:
the fixed board is further provided with an inwardly curved arc-shaped slide track located adjacent to the adjusting arm;
the movable board has a side provided with an upward extending arc-shaped extension arm having an inner side formed with an arc-shaped locking groove and an outer side integrally formed with a slide plate slidable into the slide track of the fixed board.
9. The crash helmet in accordance with claim 8 , wherein when the protruding plate of the movable board is received in the through hole of the fixed board, a distal end of the slide plate of the movable board is slidable into the slide track of the fixed board.
10. The crash helmet in accordance with claim 8 , wherein when the locking slot of the movable board is lockable on the positioning block of the fixed board by rotation of the movable board, the locking block of the face mask is inserted into and locked in the locking groove of the extension arm of the movable board, and the slide plate of the movable board is slidable into the slide track of the fixed board.
11. The crash helmet in accordance with claim 1 , wherein the extension arm of the movable board has a root portion provided with the frame.
12. The crash helmet in accordance with claim 2 , wherein the elastic press plate has an end connected to the frame and a side depending in the frame.
13. The crash helmet in accordance with claim 1 , wherein the fixed board is secured in the mounting cavity of the helmet body.
14. The crash helmet in accordance with claim 1 , wherein the protruding plate of the movable board is rotatable in the through hole of the fixed board by a screw member.
15. The crash helmet in accordance with claim 14 , wherein the mounting cavity has a screw bore, the protruding plate of the movable board has a central hole, and the screw member is extended through the central hole of the movable board and screwed into the screw bore of the helmet body.