U.S. patent application number 16/386487 was filed with the patent office on 2020-10-22 for rotation adjuster of armrest.
The applicant listed for this patent is Yen-Chi Lai, Yu-Shan Lai. Invention is credited to Yen-Chi Lai, Yu-Shan Lai.
Application Number | 20200329869 16/386487 |
Document ID | / |
Family ID | 1000005132176 |
Filed Date | 2020-10-22 |
![](/patent/app/20200329869/US20200329869A1-20201022-D00000.png)
![](/patent/app/20200329869/US20200329869A1-20201022-D00001.png)
![](/patent/app/20200329869/US20200329869A1-20201022-D00002.png)
![](/patent/app/20200329869/US20200329869A1-20201022-D00003.png)
![](/patent/app/20200329869/US20200329869A1-20201022-D00004.png)
![](/patent/app/20200329869/US20200329869A1-20201022-D00005.png)
![](/patent/app/20200329869/US20200329869A1-20201022-D00006.png)
![](/patent/app/20200329869/US20200329869A1-20201022-D00007.png)
United States Patent
Application |
20200329869 |
Kind Code |
A1 |
Lai; Yu-Shan ; et
al. |
October 22, 2020 |
Rotation Adjuster of Armrest
Abstract
A rotation adjuster of an armrest is connected on a bottom of a
supporting extension, a rotatable fixer connected on a holding
tray, and a U-shaped plate having a circular groove, a slidable
seat, a support post, two slidable engagement structures, and
multiple arcuate notches. The holding tray includes a body and
multiple spaced recesses. The rotatable fixer includes multiple
columns, a circular protrusion, multiple receiving orifices
configured to accommodate multiple springs, multiple balls and the
multiple pushing elements respectively, and a connection orifice.
The U-shaped plate includes the circular groove, a first rib, a
threaded orifice, and two locking pegs. The slidable seat includes
a U-shaped frame, a covering sheet, a first slot, and two second
slots. Each slidable engagement structure includes multiple arcuate
notches and a flexible projection received in a trench. A screw is
inserted through the connection orifice of the rotatable fixer.
Inventors: |
Lai; Yu-Shan; (Taibao City,
TW) ; Lai; Yen-Chi; (Chiayi City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Lai; Yu-Shan
Lai; Yen-Chi |
Taibao City
Chiayi City |
|
TW
TW |
|
|
Family ID: |
1000005132176 |
Appl. No.: |
16/386487 |
Filed: |
April 17, 2019 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47C 1/0308 20180801;
A47C 1/0307 20180801; A47C 7/541 20180801 |
International
Class: |
A47C 1/03 20060101
A47C001/03; A47C 7/54 20060101 A47C007/54 |
Claims
1. A rotation adjuster of an armrest comprising: a supporting
extension, a holding tray connected on a bottom of the supporting
extension, a rotatable fixer connected on a bottom of the holding
tray, and a U-shaped plate having a circular groove which is
rotatably connected with the rotatable fixer, a slidable seat
engaged with an end of the U-shaped plate, a support post connected
with a bottom of the slidable seat, and two slidable engagement
structures respectively defined between the holding tray and the
rotatable fixer and between the U-shaped plate and the slidable
seat, wherein the rotatable fixer includes multiple pushing
elements fixed thereon, and multiple arcuate notches surround
around an inner rim of the circular groove; wherein the holding
tray includes a body and multiple spaced recesses; wherein the
rotatable fixer includes multiple columns, a circular protrusion,
multiple receiving orifices configured to accommodate multiple
springs, multiple balls and the multiple pushing elements
respectively, and a connection orifice; wherein the U-shaped plate
includes the circular groove, a first rib, a threaded orifice, and
two locking pegs; wherein the slidable seat includes a U-shaped
frame and a covering sheet corresponding to a shape of the U-shaped
frame, a first slot defined on the covering sheet and accommodating
the first rib, two second slots defined on the U-shaped frame
accommodating the two locking pegs so as to limit the moving
distance, wherein two openings of the two second slots 54 are
opposite to an opening of the first slot; wherein each of the two
slidable engagement structures includes multiple arcuate notches
formed on a first contact face of each slidable engagement
structure, and each slidable engagement structure includes a
flexible projection received in a trench so as to flexibly engage
with the multiple arcuate notches; wherein a screw is inserted
through the connection orifice of the rotatable fixer to screw with
the threaded orifice of the U-shaped plate so that the circular
protrusion is rotatably connected with the circular groove, and the
multiple pushing elements abut against the multiple arcuate notches
respectively, thus rotating and moving the supporting extension
relative to the support post forward, backward, leftward, and
rightward.
2. The rotation adjuster as claimed in claim 1, wherein the first
contact face of each slidable engagement structure has multiple
second ribs, and the second contact face of each slidable
engagement structure has multiple rails corresponding to the
multiple second ribs individually.
3. The rotation adjuster as claimed in claim 1, wherein the
flexible projection receives a resilient element for contacting
with the trench.
4. The rotation adjuster as claimed in claim 2, wherein the
flexible projection receives a resilient element for contacting
with the trench.
Description
BACKGROUND OF THE INVENTION
Field of the Invention
[0001] The present invention relates to a rotation adjuster of an
armrest which contains a holding tray connected on a bottom of a
supporting extension, a rotatable fixer connected on a bottom of
the holding tray, and a U-shaped plate having a circular groove
which is rotatably connected with the rotatable fixer, a slidable
seat engaged with an end of the U-shaped plate, and a support post
connected with a bottom of the slidable seat, such that the
supporting extension is rotated and moved forward, backward,
leftward, and rightward relative to the support post.
Description of the Prior Art
[0002] A conventional armrest structure is arranged on a chair so
as to support user's arms according to using ergonomics and
requirements.
[0003] However, only a height of a supporting extension of the
armrest is adjustable or the supporting extension is rotated to a
specific angle, hence the user cannot move and rotate the
supporting extension freely so as to support the user's arms
stably. In other words, the height of the supporting extension of
the armrest is adjustable, but the supporting extension cannot be
rotated randomly based on the using requirements.
[0004] In addition, a width between two supporting extensions on
two sides of the chair and a position of the two supporting
extensions cannot be adjusted, thus lacking ergonomics.
[0005] The present invention has arisen to mitigate and/or obviate
the afore-described disadvantages.
SUMMARY OF THE INVENTION
[0006] The primary objective of the present invention is to provide
a rotation adjuster of an armrest which contains a supporting
extension is adjustably moved forward and backward relative to a
rotatable fixer via a holding tray, and the rotatable fixer is
rotated 360 degrees relative to a circular groove of a U-shaped
plate, hence an end of the U-shaped plate is engaged with a
slidable seat so as to adjust the supporting extension leftward and
rightward, and after a bottom of the slidable seat is connected
with a support post, the supporting extension is rotated and moved
forward, backward, leftward, and rightward relative to the support
post.
[0007] Thereby, after fixing the rotation adjuster on two sides of
a chair seat, the supporting extension is adjustable based on using
requirements so as to support a user's two arms and to obtain using
ergonomics.
[0008] To obtain above-mentioned objectives, a rotation adjuster of
an armrest provided by the present invention contains: a supporting
extension, a holding tray connected on a bottom of the supporting
extension, a rotatable fixer connected on a bottom of the holding
tray, and a U-shaped plate having a circular groove which is
rotatably connected with the rotatable fixer, a slidable seat
engaged with an end of the U-shaped plate, a support post connected
with a bottom of the slidable seat, and two slidable engagement
structures respectively defined between the holding tray and the
rotatable fixer and between the U-shaped plate and the slidable
seat.
[0009] The rotatable fixer includes multiple pushing elements fixed
thereon, and multiple arcuate notches surround around an inner rim
of the circular groove.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 is a perspective view showing the assembly of a
rotation adjuster of an armrest according to a preferred embodiment
of the present invention.
[0011] FIG. 2 is a perspective view showing the exploded components
of the rotation adjuster of the armrest according to the preferred
embodiment of the present invention.
[0012] FIG. 2-1 is an amplified perspective view of a back surface
of FIG. 2.
[0013] FIG. 3 is a perspective view showing the exploded components
of a rotatable fixer of the rotation adjuster of the armrest
according to the preferred embodiment of the present invention.
[0014] FIG. 4 is a perspective view showing the exploded components
of a slidable seat of the rotation adjuster of the armrest
according to the preferred embodiment of the present invention.
[0015] FIG. 5 is a side plan view showing the operation of the
rotation adjuster of the armrest according to the preferred
embodiment of the present invention.
[0016] FIG. 6 is a side plan view showing the assembly of a
slidable engagement structure defined between a U-shaped plate and
the slidable seat of the rotation adjuster of the armrest according
to the preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0017] The present invention will be clearer from the following
description when viewed together with the accompanying drawings,
which show, for purpose of illustrations only, a preferred
embodiment in accordance with the present invention.
[0018] A rotation adjuster of an armrest according to a preferred
embodiment of the present invention comprises: a supporting
extension 1, a holding tray 2 connected on a bottom of the
supporting extension 1, a rotatable fixer 3 connected on a bottom
of the holding tray 2, and a U-shaped plate 4 having a circular
groove 41 which is rotatably connected with the rotatable fixer 3
(as shown in FIGS. 1, 2 and 2-1), a slidable seat 5 engaged with an
end of the U-shaped plate 4, a support post 6 connected with a
bottom of the slidable seat 5, and two slidable engagement
structures 7 respectively defined between the holding tray 2 and
the rotatable fixer 3 and between the U-shaped plate 4 and the
slidable seat 5, wherein the rotatable fixer 3 includes multiple
pushing elements 36 fixed thereon, and multiple arcuate notches 42
surround around an inner rim of the circular groove 41 (as shown in
FIG. 3).
[0019] The holding tray 2 includes a body 21 locked on the
supporting extension 1 (the bottom of the supporting extension 1 is
depressed and corresponds to a shape of the body 21 so that the
supporting extension 1 accommodates and is locked with the holding
tray 2), and the holding tray 2 includes multiple spaced recesses
22 defined in the body 21.
[0020] The rotatable fixer 3 includes multiple columns 31 extending
from a top thereof and locked with the multiple spaced recesses 22
respectively so as to limit a moving distance of the supporting
extension 1, a circular protrusion 32 extending from a bottom of
the rotatable fixer 3 and corresponding to the circular groove 41,
multiple receiving orifices 33 configured to accommodate multiple
springs 34, multiple balls 35 and the multiple pushing elements 36
respectively, and a connection orifice 37 defined on a center of
the rotatable fixer 3.
[0021] The U-shaped plate 4 includes the circular groove 41, a
first rib 44 extending from a center of an inner surface of the
U-shaped plate 4 (as illustrated in FIG. 4), the multiple arcuate
notches 42 surrounding around the inner rim of the circular groove
41, a threaded orifice 43 defined on a center of the circular
groove 41, and two locking pegs 45 extending from a distal end of
an outer surface of the U-shaped plate 4.
[0022] The slidable seat 5 includes a U-shaped frame 51 and a
covering sheet 52 corresponding to a shape of the U-shaped frame
51, a first slot 53 defined on the covering sheet 52 and
accommodating the first rib 44, two second slots 54 defined on the
U-shaped frame 51 accommodating the two locking pegs 45 so as to
limit the moving distance, wherein two openings of the two second
slots 54 are opposite to an opening of the first slot 53, and a
surface of the U-shaped plate 4 having the two locking pegs 45
limits a movement distance of connection.
[0023] Each of the two slidable engagement structures 7 includes
multiple arcuate notches 71 formed on a first contact face of each
slidable engagement structure 7, and each slidable engagement
structure 7 includes a flexible projection 72 received in a trench
73 so as to flexibly engage with the multiple arcuate notches
71.
[0024] In assembly, a screw 8 is inserted through the connection
orifice 37 of the rotatable fixer 3 to screw with the threaded
orifice 43 of the U-shaped plate 4 so that the circular protrusion
32 is rotatably connected with the circular groove 41, and the
multiple pushing elements 36 abut against the multiple arcuate
notches 42 respectively, thus rotating and moving the supporting
extension 1 relative to the support post 6 forward, backward,
leftward, and rightward.
[0025] In operation, multiple spaced recesses 22 of the holding
tray 2 are slid relative to the multiple columns 31 of the
rotatable fixer 3 respectively so as to adjustably move the
supporting extension 1 forward and backward (in this embodiment,
some of multiple spaced recesses 22 are aligned in a row, and the
other spaced recesses 22 are aligned in the other row, wherein the
multiple spaced recesses 22 in each row are combined to form a sole
recess having a longer length), and the two slidable engagement
structures 7 fix the holding tray 2 and the rotatable fixer 3 (the
flexible projection 72 engages with any one of the multiple arcuate
notches 71, when a sliding force is more than an engaging force,
the flexible projection 72 flexibly deforms downward so that one of
the multiple arcuate notches 71 passes through the flexible
projection 72). Since the rotatable fixer 3 is rotated 360 degrees
relative to the circular groove 41, and the multiple balls 35 of
the pushing elements 36 are pushed by the multiple springs 34
individually to engage with any one arcuate notch 42 (The pushing
elements 36 is configured in a plurality of numbers) when a
rotating force is more than the engaging force of the multiple
springs 34, the multiple arcuate notches 42 slide through the
multiple balls 35) so that the supporting extension 1 is adjustably
rotated relative to the support post 6. Thereafter, the end of the
U-shaped plate 4 is engaged with the slidable seat. 5, and one of
the two slidable engagement structures 7 is defined between the
U-shaped plate 4 and the slidable seat 5 (as shown in FIGS. 5 and
6) so as to slide the supporting extension 1 relative to the
support post 6 leftward and rightward, thus rotating and moving the
supporting extension 1 relative to the support post 6 forward,
backward, leftward, and rightward. Thereby, after fixing the
rotation adjuster on two sides of a chair seat, the supporting
extension is adjustable based on using requirements so as to
support a user's two arms and to obtain using ergonomics.
Preferably, the supporting extension 1 is lifted and descended as a
conventional support post 6. Since it is a well-known art to lift
and descent the supporting extension 1, further remarks are
omitted.
[0026] Furthermore, the first contact face of each slidable
engagement structure 7 has multiple second ribs 81, and the second
contact face of each slidable engagement structure 7 has multiple
rails 82 corresponding to the multiple second ribs 81 individually
so as to slide the first and second contact faces of each slidable
engagement structure 7 smoothly. The trench 73 receives a resilient
element 83 for contacting with the flexible projection 72 so as to
provide an engagement of the multiple arcuate notches 71.
[0027] While various embodiments in accordance with the present
invention have been shown and described, it is clear to those
skilled in the art that further embodiments may be made without
departing from the scope of the present invention.
* * * * *