| 摘要 |
The present invention provides an apparatus comprising a rigid block with two rigid arms such that there is at least one flexible flap extending from each of the arms in mutual convergent attitude and biased toward a center of the space between the rigid arms. The space between the rigid arms provides integral convexly curved surface such that it enables the invention to advantageously accept a downwardly facing surface of the rocker in line contact. The invented device, wedged between a rocker of a chair and a floor surface, receives the rocker in the space between the rigid arms, upon which the flexible flaps, having by construction bias sufficient to grip of the rocker, hold the invention on the rocker so that the chair is precluded from a rocking motion and thus is immobilized. Additionally, the apparatus' surface facing a floor surface is adapted with an anti-skidding device for contact with the floor. For partial immobilization, the invented device may be used on the front or back rocker to immobilize the front or back rocking motion, respectively. Alternatively, the apparatus may be used wherein two rigid blocks placed in opposing positions on the rocker of the rocking chair and in contact with the floor surface, thus rendering the rocking chair fully immobilized.
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