Patent ID: 6705689
Filing Date: 2004-03-16
Classification: A47B

Abstract:
A track device comprising:a first track comprising an upper longitudinal lip and a lower longitudinal lip, the first track further comprising a first stop and an engaging block having a retaining portion; a second track slidably received between the upper longitudinal lip and the lower longitudinal lip of the first track, the second track comprising a second stop for abutting against the first stop of the first track, the second track further including a third stop with a protrusion, the second track further including an upper longitudinal lip and a lower longitudinal lip, the second track further including a first engaging member on an end thereof, the first engaging member including an extension member, the extension member including an engaging section and a foot; and a third track slidably received between the upper longitudinal lip and the lower longitudinal lip of the second track, the third track including a second engaging member for abutting against the third stop of the second track, the second engaging member including an engaging edge and a leg, the leg being pressable to allow disengagement of the engaging edge from the protrusion on the third stop; wherein when the second track moves inward into the first track, the engaging section abuts against the retaining portion of the engaging block, thereby preventing inward movement of the second track; and wherein when the foot of the first engaging member is pressed against by a bottom of the third track, the extension member is lifted for disengaging the engaging section with the retaining portion of the engaging block.