| 摘要 |
<p>A parking brake device includes a booster mechanism 14 having an intermediate lever 24 pivotally supported at a bracket 22, and a movable pulley 28 supported at a tip end of the intermediate lever 24. When a first operation cable 13 is pulled by operating a parking brake pedal 12, the movable pulley 28 around which an intermediate portion of the inner cable 13 i is wound is pulled with doubled force, and the doubled pulling force is further boosted due to the lever ratio of the intermediate lever 24 which supports the movable pulley 28, and is transmitted via an equalizer 15 and a second operation cable 16 to a brake device 11 provided at a wheel with the pulling force boosted to a boost ratio twice as much as the lever ratio. By combining the movable pulley28 and the intermediate lever 24, the length of the intermediate lever 24 to obtain the same boost ratio can be made half as compared with the case where only the intermediate lever 24 is used, thereby making the booster mechanism 14 compact. Thus, a parking brake device is made compact while a boost ratio of a booster mechanism 14 of the parking brake device is secured. <IMAGE></p> |
