Abstract: A quick-release cymbal locking device to be mounted to a stand rod includes a first locking member and a second locking member. The first locking member has an upper nut portion and a lower nut portion. A receiving space is defined between the upper and lower nut portions. The upper and lower nut portions each have a first through hole with a diameter greater than that of the stand rod. The first through hole includes a first threaded portion and a first smooth portion. The second locking member has a head portion and a handle portion. The head portion is inserted into the receiving space and has a second through hole with a diameter greater than that of the stand rod. The second through hole includes a second threaded portion and a second smooth portion.

Abstract: A tightening structure of a musical instrument stand includes stationary or immovable member and a movable member. The movable member includes a cylindrical shaft extending outward in an axial direction. One side of the immovable member has a recess. A bottom of the recess forms a semi-circular arc with a radius of curvature corresponding to that of the shaft. When the shaft is inserted into the recess it abuts against the bottom of the recess. The immovable member has a screw hole communicating with the recess. The screw hole is perpendicular to the axial direction of the cylindrical shaft. A fastening bolt is screwed into the screw hole. One end of the first fastening bolt is inserted into the recess and has a flared end portion to press against the shaft, and another end is connected with a handle. By rotating the handle, the flared end portion is drawn against the shaft, thereby rendering the movable member stationary.

Abstract: A tightening structure of a musical instrument stand includes stationary or immovable member and a movable member. The movable member includes a cylindrical shaft extending outward in an axial direction. One side of the immovable member has a recess. A bottom of the recess forms a semi-circular arc with a radius of curvature corresponding to that of the shaft. When the shaft is inserted into the recess it abuts against the bottom of the recess. The immovable member has a screw hole communicating with the recess. The screw hole is perpendicular to the axial direction of the cylindrical shaft. A fastening bolt is screwed into the screw hole. One end of the first fastening bolt is inserted into the recess and has a flared end portion to press against the shaft, and another end is connected with a handle. By rotating the handle, the flared end portion is drawn against the shaft, thereby rendering the movable member stationary.

Abstract: A level shifter receiving an input with a relatively narrow voltage range and provides an output with a relatively wide voltage range. The level shifter including a transistor with a turn-on voltage. Control circuitry applies a bias to the level shifter such that the transistor does not receive the turn-on voltage.

Abstract: A level shifter receiving an input with a relatively narrow voltage range and provides an output with a relatively wide voltage range. The level shifter including a transistor with a turn-on voltage. Control circuitry applies a bias to the level shifter such that the transistor does not receive the turn-on voltage.

Abstract: A joint instrument support assembly has a rotating elbow with two ear parts. A groove is formed between the two ear parts. One ear part communicates with the groove via a circular hole. Each ear part has a circular wall facing toward the groove. A rotating block is disposed in the rotating elbow. A rod goes through the rotating block. A limiting element locks on the rod and positions in the axle hole to rotate with respect to the rotating block. A sliding block with a through hole and an outer thread part is disposed in an accommodating room. A pad is mounted on the outer thread part and strides across the outer edges of the two circular walls. A fastening element locks onto the outer thread part outside the pad.

Abstract: An anti-skid sleeve for a musical instrument stand comprises a body, having a containing portion formed on the top end of the body for insertion of the musical instrument stand and concavely provided on one side face of the body with a receiving portion extending toward the bottom end of the body, and two side walls formed respectively at two opposite sides of the receiving portion; a non-slip stud, having one end pivotally disposed between the two side walls of the receiving portion by a pivot assembly such that the other end of the non-slip stud may be pivotally moved between a first position in the receiving portion and a second position outside the receiving portion, and the pivot assembly able to clamp the two side walls of the receiving portion for fixing the position of the non-slip stud.

Abstract: An anti-skid sleeve for a musical instrument stand comprises a body, having a containing portion formed on the top end of the body for insertion of the musical instrument stand and concavely provided on one side face of the body with a receiving portion extending toward the bottom end of the body, and two side walls formed respectively at two opposite sides of the receiving portion; a non-slip stud, having one end pivotally disposed between the two side walls of the receiving portion by a pivot assembly such that the other end of the non-slip stud may be pivotally moved between a first position in the receiving portion and a second position outside the receiving portion, and the pivot assembly able to clamp the two side walls of the receiving portion for fixing the position of the non-slip stud.

Abstract: A joint instrument support assembly is disclosed. Both sides of a rotating elbow have an ear part, respectively. A groove is formed between the two ear parts. One ear part communicates with the groove via a circular hole. The two ear parts have a circular wall toward the groove, respectively. A rotating block is disposed in the rotating elbow. A rod goes through the rotating block. A limiting element locks on the rod and positions in the axle hole to rotate with respect to the rotating block. A sliding block having a through hole and an outer thread part is disposed in an accommodating room. A pad is mounted on the outer thread part and strides across the outer edges of the two circular walls. A fastening element locks onto the outer thread part outside the pad.

Abstract: A tube tightening structure of a music instrument is disclosed. A plastic body is provided inside a metal hollow shell. The body has a through hole for the insertion of a tube. The body has an extension part that has a tightening part. A threaded element is connected with a rotating element outside the shell. The rotation of the rotating element displaces the threaded element, so that the tightening part tightly holds the tube in the through hole of the body.

Abstract: A support for a practicing drum or electronic drum includes a pipe element with several stands. The pipe element is penetrated with a vertical bar. The support has a bar element whose both ends have first and second adjusting structures, respectively. The vertical bar goes through the first adjusting structure. The second adjusting structure has a side bar whose end is disposed with an instrument, such as drum or cymbal. The first and second adjusting structures enable the bar element and the side bar to change their orientations and positions. An instrument pedal is disposed underneath the pipe element. The instrument pedal and the pipe element are connected by a connecting structure to achieve firm positioning.

Abstract: An instrument stand with variable ground contact positions of its supporting pods is disclosed. It has a standing post mounted with two positioning rings. One of them is fixed, and the other can slide relative to the former. The positioning rings have several supporting bases and several connecting elements that fix with the supporting bases after angle adjustment. The supporting pods are locked on the two positioning rings. Each supporting pod is controlled by the relative motion of the two positioning rings to expand and collapse. The ground contact positions of the supporting pods of the invention are thus variable.

Abstract: A heelless instrument pedal device includes a bottom board and a pedal board. The bottom board is in connection with an instrument support and has two pivotal connection elements protruding upwards with a ball shape. The rear bottom surface of the pedal board has a pivotal connection base corresponding to the pivotal connection elements. The pedal board is connected to the pivotal connection elements on the bottom board using the pivotal connection base. Thus, the pedal board can swing in the direction of the force applied by the user's foot. The front end of the pedal board has a linking element, so that the linking element moves as the pedal board swings with respect to the pivotal connection elements.

Abstract: An instrument stand with variable ground contact positions of its supporting pods is disclosed. It has a standing post mounted with two positioning rings. One of them is fixed, and the other can slide relative to the former. The positioning rings have several supporting bases and several connecting elements that fix with the supporting bases after angle adjustment. The supporting pods are locked on the two positioning rings. Each supporting pod is controlled by the relative motion of the two positioning rings to expand and collapse. The ground contact positions of the supporting pods of the invention are thus variable.

Abstract: A musical instrument stand assembly with a foldable pedal includes a main stand body, and the main stand body includes a main rod, and the bottom of the main rod includes two support rods each with a recession, and the recession includes a first circular serration; two side frames, and a sidewall of each side frame includes a protrusion and a second circular serration at the protrusion, and each side frame is installed by engaging each protrusion with the recession of each support rod, such that the first and second circular serrations are engaged with each other. With the design of rotably engaging the two side frames and the two support rods, the main stand body of the musical instrument has the function of adjusting its inclination with respect to a vertical position, and the effect of conveniently folding the pedal of the musical instrument.

Abstract: A musical instrument stand assembly with a foldable pedal includes a main stand body, and the main stand body includes a main rod, and the bottom of the main rod includes two support rods each with a recession, and the recession includes a first circular serration; two side frames, and a sidewall of each side frame includes a protrusion and a second circular serration at the protrusion, and each side frame is installed by engaging each protrusion with the recession of each support rod, such that the first and second circular serrations are engaged with each other. With the design of rotably engaging the two side frames and the two support rods, the main stand body of the musical instrument has the function of adjusting its inclination with respect to a vertical position, and the effect of conveniently folding the pedal of the musical instrument.

Abstract: A drum bracket including an adjustment rod and three support bars pivotally connected with upper end of the adjustment rod at equal angular intervals. Each support bar has a swinging end. An L-shaped claw section is pivotally connected with the swinging end of each support bar and fixable with the support bar. A bush is axially movably fitted on the adjustment rod. Three links are pivotally connected with the bush at equal angular intervals. Each link is also pivotally connected with a middle section of each support bar. A bottom of the adjustment rod is formed with outer thread under the bush. An adjustment nut is screwed on the outer thread.

Abstract: An angle adjust device for a cymbal includes a connecting seat mounted to a free end of a cymbal stand. The connecting includes a hollow stub longitudinally extending through the connecting seat and a protrusion laterally extending from the connecting seat. A connector is mounted to the protrusion of the connecting seat and has a trough defined in the connector. The trough has an opening defined in one side of the connector facing the connecting seat. An actuated rod is limited in the connector. The actuated rod has a threaded section screwed into the threaded hole in the slider and a polygonal head co-axially extending from the threaded section through the connector for user to easily rotate the actuated rod and adjust a distance between the slider and the connecting seat.

Abstract: An instrument support elbow includes a seat body. A coupling seat upward extends from one side of the seat body for rotatably coupling with a rotary block. The rotary block is formed with a radial through hole for a support rod to extend therethrough. The rotary block is formed with a cavity perpendicularly intersecting the through hole. A fixing member passes through the cavity to the through hole. The fixing member is formed with a ring hole corresponding to the through hole, whereby the support rod extends through the ring hole and the through hole. A turning member extending out of the rotary block serves to drive the fixing member to move along the radius of the support rod.

Abstract: An instrument support elbow includes a seat body. A coupling seat upward extends from one side of the seat body for rotatably coupling with a rotary block. The rotary block is formed with a radial through hole for a support rod to extend therethrough. The rotary block is formed with a cavity perpendicularly intersecting the through hole. A fixing member passes through the cavity to the through hole. The fixing member is formed with a ring hole corresponding to the through hole, whereby the support rod extends through the ring hole and the through hole. A turning member extending out of the rotary block serves to drive the fixing member to move along the radius of the support rod.