Keyboard instrument support with adjustable ability
First Claim
1. In a keyboard instrument support having two legs horizontally separated from each other, two outer tubes respectively and obliquely extending out from distal ends of the two legs, two inner tubes slidably received in the two outer tubes respectively, two arms horizontally separated from each other and extending from free ends of the two inner tubes, two connecting tubes with two sliding tubes each slidably received in a corresponding one of the two connecting tubes being securely connected to outer faces of a respective one of the outer tubes and the corresponding one of the inner tubes, wherein distal ends of the two sliding tubes are securely connected to outer faces of one of the outer tubes and one of the inner tubes and each of the connecting tubes is provided with pivotal plate with an eccentric block integrally formed with the pivotal plate and selectively extendable through the outer face of the connecting tube to engage the outer face of the sliding tube so as to limit the sliding movement of the sliding tubes inside the connecting tubes, wherein the improvements comprise:
- a first seat and a second seat mounted on a corresponding one of the two outer tubes and respectively composed of two plates to rotatably receive therebetween a roller with multiple bosses formed on an outer periphery of the roller to correspond to a hole adapted to be defined in each of the outer tubes and each boss being received in one of multiple adjusting holes adapted to be defined in each of the inner tubes;
a first rotation tube with a first end securely adapted to be connected to an outer face of the second seat and having an open second end to securely receive therein a second rotation tube integrally formed with two extensions, two threaded bolts integrally formed with each of the extensions and respectively extending through a corresponding one of the rollers sandwiched between the first and second seats;
a ratchet firmly connected to the extension of the second rotation tube and selectively rotated to drive the roller in each of the first and second seats to rotate; and
means for selectively driving the ratchet to rotate such that the rotation of the roller in the first and second seats lifts or retracts the inner tubes with respect to the outer tubes and the arms are able to move simultaneously to maintain the keyboard instrument placed on top of the two arms horizontal.
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Accused Products
Abstract
A keyboard instrument support has a driving device to control upward and downward movement of inner tubes relative to the outer tubes and a ratchet device to retain the elevation of the inner tubes. The ratchet device is composed of a ratchet alternatively rotated by the driving device and a leverage to abut a ratchet tooth such that after the inner tubes are elevated by the driving device, the abutment of the leverage to the ratchet retains the elevation of the inner tubes.
21 Citations
20 Claims
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1. In a keyboard instrument support having two legs horizontally separated from each other, two outer tubes respectively and obliquely extending out from distal ends of the two legs, two inner tubes slidably received in the two outer tubes respectively, two arms horizontally separated from each other and extending from free ends of the two inner tubes, two connecting tubes with two sliding tubes each slidably received in a corresponding one of the two connecting tubes being securely connected to outer faces of a respective one of the outer tubes and the corresponding one of the inner tubes, wherein distal ends of the two sliding tubes are securely connected to outer faces of one of the outer tubes and one of the inner tubes and each of the connecting tubes is provided with pivotal plate with an eccentric block integrally formed with the pivotal plate and selectively extendable through the outer face of the connecting tube to engage the outer face of the sliding tube so as to limit the sliding movement of the sliding tubes inside the connecting tubes, wherein the improvements comprise:
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a first seat and a second seat mounted on a corresponding one of the two outer tubes and respectively composed of two plates to rotatably receive therebetween a roller with multiple bosses formed on an outer periphery of the roller to correspond to a hole adapted to be defined in each of the outer tubes and each boss being received in one of multiple adjusting holes adapted to be defined in each of the inner tubes;
a first rotation tube with a first end securely adapted to be connected to an outer face of the second seat and having an open second end to securely receive therein a second rotation tube integrally formed with two extensions, two threaded bolts integrally formed with each of the extensions and respectively extending through a corresponding one of the rollers sandwiched between the first and second seats;
a ratchet firmly connected to the extension of the second rotation tube and selectively rotated to drive the roller in each of the first and second seats to rotate; and
means for selectively driving the ratchet to rotate such that the rotation of the roller in the first and second seats lifts or retracts the inner tubes with respect to the outer tubes and the arms are able to move simultaneously to maintain the keyboard instrument placed on top of the two arms horizontal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A keyboard instrument support comprising:
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two Z-shaped brackets with a distance apart from each other;
at least one connecting tube connecting the two brackets together and having a sliding tube slidably received in the connecting tube to adjust the distance between the two brackets, wherein each bracket has an outer tube and an inner tube slidably received in and extending out of the outer tube;
a first seat and a second seat mounted on a corresponding one of the two outer tubes and respectively composed of two plates to rotatably receive therebetween a roller with multiple bosses formed on an outer periphery of the roller to correspond to a hole adapted to be defined in each of the outer tubes and each boss being received in one of multiple adjusting holes defined in each of the inner tubes;
a first rotation tube with a first end securely adapted to be connected to an outer face of one of the second seat and an open second end to slidably receive therein a second rotation tube integrally formed with two extensions extending out of the first rotation tube, a threaded bolt integrally formed with the extension and extending through the rollers sandwiched between the first and second seats;
means for ratcheting elevation of the inner tubes relative to the outer tubes; and
means for alternatively driving the ratchet means to rotate such that the rotation of the roller in the first and second seats lifts or retracts the inner tubes with respect to the outer tubes and the arms are able to move simultaneously to maintain the keyboard instrument placed on top of the two arms horizontal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification