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US 6,186,460 B1Granted
Keyboard support adjusting device
OwnerChin-Chih Lininventor
Life of this patent
Estimating the term…
Abstract
A keyboard support adjusting device includes a rotary frame, two frame plates, a connecting seat, and two brackets. A shaft connects the frame plates to the rotary frame. The connecting seat is pivotally connected at one end to the rotary frame. The other end of the connecting seat has a projecting extension seat with a through seat hole in a transverse direction and a curved groove. A tightening device passes through the frame plates, the brackets and the curved groove. The brackets are disposed on both sides of the extension seat, each of which includes a vertical portion provided with a through hole and a curved opening, and a horizontal portion defining a bracket face that may be connected to a keyboard support.
Claims20
A keyboard support adjusting device, comprising:
- a rotary frame having a substantially inverted U-shape with two side wings respectively provided on sides thereof, and a pivotal connection provided at a front end thereof, said side wings being provided with symmetrical wing holes, respectively;
- two frame plates, each of which has an end hole at one end and a plate hole at an opposite end, a shaft passing through said end holes and said wing holes to pivotally connect said frame plates to said rotary frame;
- a connecting seat having a rear side pivotally connected to said pivotal connection of said rotary frame, a front side of said connecting seat being provided with a projecting extension seat, said extension seat having a through seat hole in a transverse direction and a curved groove disposed below said through seat hole;
- two brackets, each being substantially L-shaped and disposed on opposite sides of said extension seat, each of said brackets including a first portion and a second portion, said first portion being provided with a through hole and a curved opening;
- a tightening device passing through said frame plates, one of said through hole and said curved opening of said brackets, and said curved groove;
- and a connecting device passing through the other of said curved opening and said through hole, whereby said curved openings enable elevation adjustment, said second portions of said brackets defining bracket faces;
- whereby said tightening device can be loosened to allow downward adjustment of said front end of said connecting seat so that said tightening device can only be displaced towards a front end of said curved groove, said tightening device being tightened after such adjustment to position said connecting seat.
4 more elements
A keyboard support adjusting device, comprising:
- a rotary frame having a substantially inverted U-shape with two side wings respectively provided on sides thereof, and a pivotal connection provided at a front end thereof, said side wings being provided with symmetrical wing holes, respectively;
- two frame plates, each of which has an end hole at one end and a plate hole at an opposite end, a shaft passing through said end holes and said wing holes to pivotally connect said frame plates to said rotary frame;
- a connecting seat having a rear side pivotally connected to said pivotal connection, a front side of said connecting seat being provided with a projecting extension seat, said extension seat having a through seat hole in a transverse direction, a side groove formed on either lateral side thereof, said side groove having a spring post projecting from a first end thereof, a spring having a first end attached to said spring post and a second end being a movable end located at a bottom end of a through curved groove located at a second end of said side grooves, and a tightening device passing through said frame plates, said two brackets, said springs, and said curved groove;
- two brackets, each being substantially L-shaped and disposed on opposite sides of said extension seat, each of said brackets including a first portion and a second portion, said first portion being provided with a through hole and a curved opening, said tightening device passing through said frame plates, one of said through hole and said curved opening of said brackets, and said curved groove;
- and a connecting device passing through the other of said curved opening and said through hole, whereby said curved openings enable elevation adjustment, said second portions defining bracket faces;
- whereby said tightening device can be loosened to allow downward adjustment of said front end of said connecting seat so that said tightening device can only be displaced towards a front end of said curved groove to stretch said springs, said tightening device being tightened after such adjustment to position said connecting seat.
3 more elements
Dependencies are inferred from the claim text.