Patent ID: 8240789
Filing Date: 2012-08-14
Classification: A47B,F16C

Abstract:
1. A positioning device of a slide assembly, the slide assembly comprising: a first rail, a second rail slidably connected to the first rail and defining a path, and a third rail slidably connected to the path of the second rail, the third rail comprises a main part and a sidewall extending from one of two sides of the main part; the positioning device comprising: a positioning member securely connected to the second rail, the positioning member comprising a board portion and two extension portions which extend from two sides of the board portion, the board portion and the two extension portions defining a space; an engaging member pivotably connected to the positioning member and comprising an engaging board and an extension arm extending from a side of the engaging board, the extension arm located in the space of the positioning member and having an engaging portion at an end thereof, an extension wing extending from a side of the engaging board and a pivotal portion located between the extension arm and the extension wing, the extension wing having an inclined surface relative to a horizontal plane and extending toward the path of the second rail; a resilient member releasably coupled to a front end of said positioning member, the resilient member disposed between the positioning member and the engaging member, the extension wing of the engaging member being slidable toward the third rail by a force of the resilient member; the first rail comprising a positioning portion which is located corresponding to the engaging portion of the engaging member, and when the second rail is pulled out a position relative to the first rail, the engaging portion of the engaging member is engaged with the positioning portion of the first rail, when the third rail is retracted to a position relative to the second rail, the sidewall of the third rail movably presses the extension wing of the engaging member to move the engaging member and the resilient member is pressed to release the engaging portion of the engaging member from the positioning portion of the first rail.