Height adjustment mechanism

Patent metadata

Field	Value
Publication number	US-11160366-B2
Application number	US-201916680235-A
Country	US
Kind code	B2
Filing date	Nov 11, 2019
Priority date	Mar 30, 2018
Publication date	Nov 2, 2021
Grant date	Nov 2, 2021

Abstract

An embodiment includes a leg height adjustment mechanism that includes a first and second latch arms, a first and second retractors, and an activator. The latch arms each include an engagement structure. The retractors each include a sloped surface and a receiving structure. The receiving structure is engaged with one of the engagement structures of the first or the second latch arms. The first latch arm extends in a first lateral direction and the second latch arm extends a second lateral direction. The second retractor is separated from the first retractor in a second lateral direction that is opposite the first lateral direction. The activator includes angled lower surfaces that are positioned outwardly relative to the sloped surfaces.

First claim

What is claimed is:

1. A height adjustment mechanism, the height adjustment mechanism comprising:
a first latch arm including a first engagement structure;
a first retractor including a first sloped surface and a first receiving structure, the first receiving structure and the first engagement structure connecting the first latch arm and the first retractor;
a second latch arm including a second engagement structure;
a second retractor including a second sloped surface and a second receiving structure, the second receiving structure and the second engagement structure connecting the second latch arm and the second retractor;
an activator including a first angled surface and a second angled surface, the first angled surface of the activator contacting the first sloped surface of the first retractor, the second angled surface of the activator contacting the second sloped surface of the second retractor, the first sloped surface of the first retractor and the second sloped surface of the second retractor being at least partially disposed between the first angled surface and the second angled surface of the activator;
a first longitudinal opening of the activator;
a second longitudinal opening of the activator, the first angled surface of the activator and the second angled surface of the activator being at least partially disposed between the first longitudinal opening of the activator and the second longitudinal opening of the activator; and
a biasing member disposed between the first retractor and the second retractor, the biasing member sized and configured to bias the first retractor and the second retractor away from one another.

2. The height adjustment mechanism of claim 1 , wherein the angled surfaces of the activator are shaped such that a translation of the activator towards the first retractor and the second retractor in a longitudinal direction causes the angled surfaces to move relative to the first sloped surface and the second sloped surface and draws the first retractor and the second retractor towards one another.

3. The height adjustment mechanism of claim 1 , wherein, in an inactive position, the activator is disposed in a first longitudinal position relative to the first retractor and the second retractor, the first retractor and the second retractor being separated by a first distance; and
wherein, in an active position, the activator is disposed in a second longitudinal position relative to the first retractor and the second retractor and the angled surfaces of the activator contact the first sloped surface and the second sloped surface to cause inward translation of the first retractor and the second retractor, the first retractor and the second retractor being separated by a second distance, the second distance being less than the first distance.

4. The height adjustment mechanism of claim 3 , wherein at least a portion of the first retractor, at least a portion of the second retractor, at least a portion of the activator, at least a portion of the first latch arm, and at least a portion of the second latch arm are disposed in a cavity of a crossbar assembly;
wherein at least a portion of the first latch arm extends through a first opening of the crossbar assembly when the activator is in the inactive position; and
wherein at least a portion of the second latch arm extends through a second opening of the crossbar assembly when the activator is in the inactive position.

5. The height adjustment mechanism of claim 4 , wherein the activator includes a protrusion that extends from the cavity of the crossbar assembly.

6. The height adjustment mechanism of claim 5 , wherein the crossbar assembly includes a protrusion; and
wherein a height of the protrusion of the activator is generally equal to a height of the protrusion of the crossbar assembly.

7. The height adjustment mechanism of claim 1 , wherein the biasing member contacts to an inner surface of the first retractor and an inner surface of the second retractor.

8. The height adjustment mechanism of claim 7 , further comprising:
a first biasing member retainer on the inner surface of the first retractor; and
a second biasing member retainer on the inner surface of the second retractor, the biasing member disposed between the inner surface of the first retractor and the inner surface of the second retractor.

9. The height adjustment mechanism of claim 1 , further comprising two pins:
wherein the activator includes two longitudinal pin apertures;
wherein the first and second latch arms each include a lateral pin aperture that partially overlaps one of the two longitudinal pin apertures;
wherein each of the two pins is positioned in one of the longitudinal pin apertures and one of the lateral pin apertures; and
wherein the pins limit motion of the activator to a substantially longitudinal direction and limit motion of the first and second latch arms to a substantially lateral direction.

10. A leg assembly that is pivotally connected to a frame and a table top, the leg assembly comprising:
a first leg subassembly including an upper leg with one or more upper latch openings and a lower leg with one or more lower latch openings, one or more of the lower latch openings being selectively aligned with one or more of the upper latch openings;
a second leg subassembly including an upper leg with one or more upper latch openings and a lower leg with one or more lower latch openings, one or more of the lower latch openings being selectively aligned with one or more of the upper latch openings;
a crossbar assembly disposed between the first leg subassembly and the second leg subassembly, the crossbar assembly including a first opening at a first end and a second opening at a second end;
a height adjustment mechanism at least partially contained in the crossbar assembly, the height adjustment mechanism comprising:
a first retractor including a first sloped surface and a first receiving structure;
a second retractor including a second sloped surface and a second receiving structure;
a first latch arm including a first engagement structure that is engaged with the first receiving structure of the first retractor;
a second latch arm including a second engagement structure that is engaged with the second receiving structure of the second retractor; and
an activator including a first angled surface, a second angled surface, a first longitudinal opening, and a second longitudinal opening, the first angled surface of the activator contacting the first sloped surface of the first retractor, the second angled surface of the activator contacting the second sloped surface of the second retractor, the first sloped surface of the first retractor and the second sloped surface of the second retractor being at least partially disposed between the first angled surface and the second angled surface of the activator, the first angled surface and the second angled surface of the activator being at least partially disposed between the first longitudinal opening and the second longitudinal opening, the activator being configurable in an inactive position to enable the first latch arm and second latch arm to extend from the first opening and the second opening of the crossbar assembly, and in an active position in which the angled surfaces contact the first sloped surface and the second sloped surface to cause inward translation of the first retractor and the second retractor such that the first latch arm and the second latch arm are drawn into the crossbar assembly via the first and second openings.

11. The leg assembly of claim 10 , wherein the crossbar assembly is coupled to the first upper leg and the second upper leg such that the f

Assignees

• Lifetime Prod Inc

Inventors

• Clegg Frank
• Ho Baik Kwang
• Cai Leo
• Du William

Classifications

• A47B2003/0835

  being superimposed, hinged and foldable · CPC title

• A47B9/14 Primary

  with pins coacting with holes · CPC title

• A47B3/083 Primary

  with foldable top leaves · CPC title

• A47B13/02

  Underframes · CPC title

• A47B9/20

  Telescopic guides · CPC title