Patent ID: 8001752

Claim:
An auxiliary device adapted to be electrically connected to a lawn mower comprising: a connecting unit adapted to be mounted to the lawn mower, and having a mounting wall which defines a first axis normal thereto and substantially parallel to the ground, and a first arcuate rack member which is disposed on said mounting wall and which extends angularly about the first axis; a housing which has a tubular surface that surrounds a second axis transverse to the first axis, and which is mounted on and which is turnable relative to said mounting wall about the first axis between a first position, where the second axis is in an upright line that is substantially normal to the ground, and a second position, where the second axis forms an included angle relative to the upright line, said tubular surface having operating-side and cutting-side tubular regions opposite to each other along the second axis; a guard member having a major wall which is mounted on and which is turnable relative to said cutting-side tubular region about the second axis, said major wall having mount and marginal regions which are radially opposite to each other, and which extend angularly about the second axis, a skirt portion which extends parallel to the second axis from said marginal region, and a second arcuate rack member which is disposed on said mount region, and which extends angularly about the second axis; and first and second pinions which are coaxially with each other, which are mounted on said cutting-side tubular region, and which are revolvable relative to said cutting-side tubular region, said first and second pinions being in meshed engagements with said first and second arcuate rack members, respectively, such that, when said housing is turned from the first position to the second position, said skirt portion is displaced angularly from a first guarding position to a second guarding position which is angularly spaced apart from said first guarding position relative to the second axis.