Patent ID: 7439433

Claim:
A snare drum strainer comprising: a switch stand forming a hollow cylindrical shape and having a top with an opening, a bottom, a first sidewall and a second sidewall being opposite to the first sidewall, wherein the switch stand further has a steady part extending outward from the first external sidewall for fastening to a drum body; a long opening parallel to an axis and defining through the second external sidewall; and two opposite pivot parts extending outward from the second external sidewall, each of which defines a pivot hole; a brake part installed inside the switch stand and comprising a self-lubricating bearing having a vertical opening consisted of a upper circular opening and a lower square opening, wherein an adjustment spiral pole is installed inside the vertical opening and has an upper non-spiral section passing through the upper circular opening and a lower spiral section located inside the lower square opening; and a horizontal opening; a shaft sleeve being of a tubular shape and mounted on the self-lubricating bearing to be fastened inside the switch stand; and a tie bar being of a square pillar shape and matches the lower square opening of the self-lubricating bearing to locate inside the lower square opening, wherein the tie bar further defines a third spiral opening through both ends of the tie bar along an axial direction, wherein an upper end of the tie bar is spirally coupled to multiple spirals of the adjustment spiral pole; a suspender steady base comprising a base body spirally coupled to a bottom of the tie bar to be driven to ascend or descend by the brake part; and a base clamp spirally coupled to the base body for clipping snares in-between the base body and the base clamp; and a pull handle driven part comprising a driven pole having two opposite ends, wherein one end of the driven pole inserts into the horizontal opening of the self-lubricating bearing through the long opening of the switch stand, and the other end of the driven pole defines a pivotal hole; two driven buttons, each of which has a first and second ends, wherein the first end of each driven button is pivotally connected to the driven pole; and a pull handle comprising a first pivotal connection part formed at a lower internal side of the pull handle and pivotally coupled to the two opposite pivot parts of the switch stand; and a second pivotal connection part formed at a lower internal side of the pull handle and pivotally coupled to the second ends of the two driven buttons.