| 摘要 |
<p>The present invention relates to a framework (1) consisting of a suitable number of members (2) which, when jointed with one another by means of several axles or pins (3) form a lazy-tongs linkwork. The members (2) are articulated with one another at the joints and at the ends, showing a permanently curved shape or a flexibility which is sufficient to ensure a certain curving whenever the framework is mounted. The size of the framework depends upon the length and upon the number of the members thereof. The mounting of said framework is achieved by stretching the pin-jointed system until it reaches a pre-established limit. Once dismounted the whole system retracts, occupying a very small space. <IMAGE></p> |
