Systems and methods for single handed operation of an adjustable stand
A disclosed adjustable stand may include a stand base, a stand cradle rotatably coupled to the stand base, and a handle rotatably coupled to the stand cradle. The adjustable stand, when the handle is rotated to an adjustment position and the stand cradle is rotated to a rotational position with respect to the stand base, may set an angle of the stand cradle with respect to the stand base to a selected angle. The adjustable stand, when the handle is rotated to a retention position, may lock the angle of the stand cradle to the selected angle.
1. An adjustable stand, comprising:
a stand base;
a stand cradle rotatably coupled to the stand base proximate a bottom edge of the stand cradle and a front edge of the stand base;
a stand arm rotatably coupled to the stand base proximate a bottom edge of the stand arm and a middle section of a top side of the stand base, and movably coupled to the stand cradle proximate two side edges of the stand cradle;
a handle rotatably coupled to the stand cradle proximate a top edge of the stand cradle;
two sets of rack teeth, each set of rack teeth coupled to a back side of the stand cradle proximate a respective one of the two side edges of the stand cradle; and
two rack tooth mechanisms, each rack tooth mechanism including a locking-sliding mechanism having a set of teeth, each locking-sliding mechanism rotatably coupled to a respective one of two ends of the handle, the rack tooth mechanism configured to:
when the handle is rotated to an adjustment position, cause each locking-sliding mechanism to rotate to an unlocked position and each set of teeth of the locking-sliding mechanism to disengage from a respective one of the two sets of rack teeth;
when the handle is in the adjustment position and the stand cradle is rotated to a first rotational position with respect to the stand base, set an angle of the stand cradle with respect to the stand base to a selected one of a plurality of angles at which the stand cradle can be set; and
when the handle is rotated to a retention position, cause each locking-sliding mechanism to rotate to a locked position, each set of teeth of the locking-sliding mechanism to engage with a portion of the respective one of the two sets of rack teeth, and lock the angle of the stand cradle to the selected angle.
2. The adjustable stand of claim 1 , wherein each locking-sliding mechanism is rotatably coupled to the respective one of the two ends of the handle by a cam rod of a respective one of the two rack tooth mechanisms.
3. The adjustable stand of claim 1 , wherein each locking-sliding mechanism is rotatably coupled to the respective one of the two ends of the handle by a rotational direction transfer mechanism of a respective one of the two rack tooth mechanisms, each rotational direction transfer mechanism transfers rotations of the handle in a first plane to rotations of the respective locking-sliding mechanism in a second plane perpendicular to the first plane.
4. The adjustable stand of claim 3 , wherein:
each rotational direction transfer mechanism is further rotatably coupled to the respective one of the locking-sliding mechanisms and the respective one of the two ends of the handle by a coil spring of the rotational direction transfer mechanism; and
when the handle is released, the coil spring causes the handle to rotate back to the retention position.
5. The adjustable stand of claim 3 , wherein:
each rotational direction transfer mechanism includes a first beveled gear and a second beveled gear rotatably coupled to the first beveled gear; and
each rotational direction transfer mechanism transfers rotations of the handle in the first plane by the respective first beveled gear to rotations of the respective one of the locking-sliding mechanisms in the second plane by the respective second beveled gear.
6. The adjustable stand of claim 1 , wherein:
the stand cradle is rotatably coupled to the stand base by a first hinge proximate the bottom edge of the stand cradle; and
when the stand cradle is rotated to the first rotational position, the stand cradle pivots around the first hinge.
7. The adjustable stand of claim 1 , wherein:
the stand arm is rotatably coupled to the stand base by a second hinge proximate the bottom edge of the stand arm; and
when the stand cradle is rotated to the first rotational position, the stand arm pivots around the second hinge.
8. The adjustable stand of claim 7 , wherein:
the second hinge includes a coil spring to create a rotational tension force in an upward rotational direction; and
when the angle of the stand cradle is being increased, the rotational tension force in the upward rotational direction reduces a load on the stand cradle.
9. The adjustable stand of claim 1 , wherein:
the adjustable stand further comprises two slots, each slot coupled to the back side of the stand cradle proximate a respective one of the two sets of rack teeth;
the stand arm is movably coupled to the two slots proximate a top edge of the stand arm; and
when the stand cradle is rotated to the first rotational position, the top edge of the stand arm moves in the two slots in a linear direction parallel to the back side of the stand cradle.
10. The adjustable stand of claim 9 , wherein when the stand cradle is rotated in an upward rotational direction, the linear direction of the top edge of the stand arm is an upward linear direction.
11. The adjustable stand of claim 9 , wherein when the stand cradle is rotated in a downward rotational direction, the linear direction of the top edge of the stand arm is a downward linear direction.
12. The adjustable stand of claim 1 , wherein:
each set of rack teeth includes a first set of angled teeth at a first angle and a second set of angled teeth at a second angle opposite the first angle;
the set of teeth of each locking-sliding mechanism includes a third set of angled teeth at the second angle and a fourth set of angled teeth at the first angle; and
when the handle is rotated to the retention position:
each third set of angled teeth engages with a portion of the first set of angled teeth of a respective one of the two sets of rack teeth; and
each fourth set of angled teeth engages with a portion of the second set of angled teeth of a respective one of the two sets of rack teeth.
13. The adjustable stand of claim 1 , wherein, when the stand cradle is rotated in a downward rotational direction, the angle of the stand cradle with respect to the stand base is decreased.
14. The adjustable stand of claim 1 , wherein, when the stand cradle is rotated in an upward rotational direction, the angle of the stand cradle with respect to the stand base is increased.
15. The adjustable stand of claim 1 , wherein the plurality of angles range from a 0 degree angle to a 90 degree angle.
16. The adjustable stand of claim 1 , wherein the plurality of angles vary by a fixed increment that is dependent on a pitch of the two sets of rack teeth.
17. An adjustable stand, comprising:
a stand base;
a stand cradle rotatably coupled to the stand base proximate a bottom edge of the stand cradle and a front edge of the stand base;
a stand arm rotatably coupled to the stand base proximate a bottom edge of the stand arm and a middle section of a top side of the stand base, and movably coupled to the stand cradle proximate two side edges of the stand cradle;
a handle rotatably coupled to the stand cradle proximate a top edge of the stand cradle;
a first set of rack teeth coupled to a back side of the stand cradle proximate a first side edge of the stand cradle;
a first locking-sliding mechanism including a first set of teeth; and
a first cam rod coupled to the first locking-sliding mechanism and rotatably coupled to a first end of the handle, the first cam rod configured to:
when the handle is rotated to an adjustment position, rotate to an unlocked position and cause the first set of teeth of the first locking-sliding mechanism to disengage from the first set of rack teeth;
when the handle is in the adjustment position and the stand cradle is forced in a rotational direction with respect to the stand base, set an angle of the stand cradle to a selected one of a plurality of angles at which the stand cradle can be set; and
when the handle is rotated to a retention position, rotate to a locked position and cause the first set of teeth of the first locking-sliding mechanism to engage with a portion of the first set of rack teeth to lock the angle of the stand cradle to the selected angle.
18. The adjustable stand of claim 17 , further comprising:
a second set of rack teeth coupled to the back side of the stand cradle proximate a second side edge of the stand cradle;
a second locking-sliding mechanism including a second set of teeth; and
a second cam rod coupled to the second locking-sliding mechanism and rotatably coupled to a second end of the handle opposite the first end, the second cam rod to:
when the handle is rotated to a retention position, rotate to a locked position and cause the second set of teeth to engage with a portion of the second set of rack teeth to lock the angle of the stand cradle to the selected angle.
19. The adjustable stand of claim 17 , wherein:
the first cam rod is rotatably coupled to the first end of the handle by a first rotational direction transfer mechanism of the first rack tooth mechanism; and
the first rotational direction transfer mechanism transfers rotations of the handle in a first plane to rotations of the first cam rod in a second plane perpendicular to the first plane.
20. The adjustable stand of claim 19 , wherein:
the first rotational direction transfer mechanism is further rotatably coupled to the first cam rod and the first end of the handle by a coil spring of the rotational direction transfer mechanism; and
when the handle is released, the coil spring causes the handle to rotate back to the retention position.