| 摘要 |
An adjustable bookrack includes a base with a guideway provided in an upper surface thereof, the guideway having a first frictional surface; a stationary upright end wall mounted securely at one end of base; a movable upright end wall disposed detachably on the guideway; a gliding member secured to the underside of the moveable upright end wall and slidable on the guideway; a braking member releasably disposed under the gliding member and having a second frictional surface opposing the first frictional surface; and means for biasing the braking member toward the gliding member so as to impel the second frictional surface against the first frictional surface, including an actuator member. Thereby, when the actuator member is pushed, the braking member is released from the guideway so as to adjust the space between the stationary and movable upright end wall.
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