Patent ID: 6847522
Filing Date: 2005-01-25
Classification: F16M,G06F

Abstract:
1. An electronic device comprising: a housing having a generally horizontal housing portion adapted to be placed on a horizontal support surface, and an upright housing portion, said generally horizontal housing portion having a rear end, said upright housing portion having a front surface, a rear surface opposite to said front surface, a lower end connected fixedly to said rear end of said generally horizontal housing portion, and two opposite side portions that are formed respectively with two aligned vertical slide slots therethrough; two aligned positioning members mounted fixedly on said front surface of said upright housing portion of said housing and disposed between and respectively adjacent to said slide slots in said upright housing portion of said housing, each of said positioning members having a front surface that is formed with an annular guide slot, an upright divider rib which is formed in said annular guide slot to divide said annular guide slot into an inner slot portion and an outer slot portion, and a plurality of positioning ribs that are disposed within said outer slot portion and that extend inwardly toward and that are spaced apart from said divider rib so as to define a vertical row of positioning slot portions in said outer slot portion, said inner and outer slot portions of each of said positioning members having upper ends connected with each other, and lower ends connected with each other; an upright back-supporting plate having a lower end that is adapted to be placed on the horizontal support surface, and an upper portion that abuts against said rear surface of said upright housing portion of said housing; two sliding members connected fixedly to said upper portion of said back-supporting plate and received respectively and slidably within said slide slots in said upright housing portion of said housing so as to permit movement of said back-supporting plate relative to said upright housing portion; a mounting member mounted fixedly on said front surface of said upright housing portion of said housing; a pair of first and second connecting rods, each of which has two ends that are connected respectively and fixedly to said sliding members; two movable members sleeved respectively and movably around two end portions of said second connecting rod, each of said movable members having a sleeve body that is sleeved around said second connecting rod, and a tongue that is connected fixedly to and that extends rearwardly from said sleeve body and that is received slidably within said annular guide slot in a corresponding one of said positioning members; two first biasing members for biasing said sliding members and said first and second connecting rods to move downwardly relative to said housing; a second biasing members for biasing said movable members to press respectively against said sliding members so as to permit movement of said tongues of said movable members from said upper ends of said inner slot portions in said annular guide slots in said positioning members into said upper ends of said outer slot portions in said annular guide slots in said positioning members and so as to prevent movement of said tongues of said movable members from said upper ends of said outer slot portions in said annular guide slots in said positioning members into said upper ends of said inner slot portions in said annular guide slots in said positioning members, thereby biasing said tongue of each of said movable members to move into a selected one of said positioning slot portion of said outer slot portion of said annular guide slot in a corresponding one of said positioning members; and a limiting unit for preventing movement of said tongues of said movable members from said lower ends of said inner slot portions of said annular guide slots in said positioning members into said lower ends of said outer slot portions of said annular guide slots in said positioning members while permitting movement of said tongues of said movable members from said lower ends of said outer slot portions of said annular guide slots in said positioning members into said lower ends of said inner slot portions of said annular guide slots in said positioning members; whereby, when said back-supporting plate is moved forcibly relative to said housing along a direction parallel to said slide slots in said housing so as to change an inclination angle of said upright housing portion of said housing relative to the horizontal support surface, said tongues of said movable members are limited to move from said upper ends of said inner slot portions of said annular guide slots in said positioning members into said upper ends of said outer slot portions of said annular guide slots in said positioning members, and from said lower ends of said outer slot portions of said annular guide slots in said positioning members into said lower ends of said inner slot portions of said annular guide slots in said positioning members.