Patent ID: 8946531
Filing Date: 2015-02-03
Classification: F16F,G10D

Abstract:
1. A spring force adjustment structure for a coil spring in a high-hat stand comprising: a tubular stand main body that is supported by a stand leg and a pedal device and has an upper end part to which a lower cymbal is attached; an up/down rod that is inserted into the stand main body, has a protruding upper end part at which an upper cymbal is held, and has a lower end part to which a pedal is connected; and the coil spring that is attached to the inside of the stand main body to bias upward the up/down rod locked onto one end side thereof, wherein a lock member is provided with a lock part locked onto the other end side of the coil spring and biased downward within the stand main body and an extension part extended to the outside through an elongated groove penetrating a peripheral wall of the stand main body, the lock member being movable vertically along the elongated groove, a cylindrical adjustment member supporting from below the extension part of the lock member is provided so as to be turnable around an axis at a predetermined vertical position on an outer peripheral part of the stand main body, a plurality of engagement steps different in height is circumferentially formed in a stair-like pattern in order of height at a supporting part of the adjustment member supporting the extension part and/or a supported part of the extension part supported by the adjustment member, a return spring is provided to rotate and bias the adjustment member in a direction in which the engagement steps supporting the extension part and/or the engagement steps supported by the adjustment member become gradually higher with respect to the stand main body, when the adjustment member is turned in a direction in which the engagement steps supporting the extension part and/or the engagement steps supported by the adjustment member become gradually lower with respect to the stand main body, the lock member descends along the elongated groove to lower a spring force of the coil spring, and when the lock member is moved upward along the elongated groove, the spring force of the coil spring increases and the adjustment member is biased and rotated by the return spring, and the engagement steps supporting the extension part and/or the engagement steps supported by the adjustment member support the extension part and/or are supported by the adjustment member at higher engagement steps, whereby the lock member is held at the position.