U.S. patent application number 11/707401 was filed with the patent office on 2008-08-21 for chair with controllable wheel assembly.
Invention is credited to Wen-Jye Chen.
Application Number | 20080197586 11/707401 |
Document ID | / |
Family ID | 39705989 |
Filed Date | 2008-08-21 |
United States Patent
Application |
20080197586 |
Kind Code |
A1 |
Chen; Wen-Jye |
August 21, 2008 |
Chair with controllable wheel assembly
Abstract
A chair with a controllable wheel assembly comprises a chair
body having a bottom plate; the chair body being formed with a
plurality of openings; a plurality of buckling seats having an
approximate U shape with two post; each post of the buckling seat
being installed with a guide groove; a side of the buckling seat
being formed with a plurality of hooks; between each buckling seat
and the bottom plate being formed with a through hole; a plurality
of wheel sets being included; and two sides of the movable block
having respective sliding grooves; each sliding groove having a
plurality of notches for receiving the hooks of the buckling seat
so that the movable block is movably combined to the chair body;
and thus the movable block is slideable along the guide groove.
Inventors: |
Chen; Wen-Jye; (Taipei City,
TW) |
Correspondence
Address: |
WEN-JYE CHEN
235 Chung-Ho, Box 8-24
Taipei
omitted
|
Family ID: |
39705989 |
Appl. No.: |
11/707401 |
Filed: |
February 20, 2007 |
Current U.S.
Class: |
280/30 |
Current CPC
Class: |
A47C 12/02 20130101 |
Class at
Publication: |
280/30 |
International
Class: |
A47C 3/00 20060101
A47C003/00 |
Claims
1. A chair with a controllable wheel assembly, comprising: a chair
body having a bottom plate; the chair body being formed with a
plurality of openings; a plurality of buckling seats having an
approximate U shape with two post; each post of the buckling seat
being installed with a guide groove; a side of the buckling seat
being formed with a plurality of hooks; between each buckling seat
and the bottom plate being formed with a through hole; a plurality
of wheel sets being included; each wheel set having a corresponding
buckling seat; each wheel set having an elastic element and a wheel
body; the elastic element having a U shape; one end of the elastic
element being connected to the wheel body and another end thereof
passing through a corresponding through hole so that the elastic
element is connected to the chair body; and two sides of the
movable block having respective sliding grooves; each sliding
groove having a plurality of notches for receiving the hooks of the
buckling seat so that the movable block is movably combined to the
chair body; thus the movable block is slideable along the guide
groove; a stop block being installed at a lower side of the movable
block; a rear side of the movable block having a push button; the
push button being received in one of the opening of the chair
body.
2. The chair with a controllable wheel assembly as claimed in claim
1, wherein a bottom of each through hole has at least one
recess.
3. The chair with a controllable wheel assembly as claimed in claim
1, wherein the elastic element has a U shape.
4. The chair with a controllable wheel assembly as claimed in claim
3, wherein the elastic element has at least one protrusion; when
the elastic element passes through the through hole, the two
protrusions are received in the recesses.
5. The chair with a controllable wheel assembly as claimed in claim
3, wherein the end of the elastic element is screwed to the wheel
body.
6. The chair with a controllable wheel assembly as claimed in claim
1, wherein the movable block has a U shape and each side of the
movable block has one of the two sliding grooves; and a lower side
is protruded with the stop block.
7. The chair with a controllable wheel assembly as claimed in claim
6, wherein the push button is installed with at least on rib and an
edge of the opening is formed with at least one trench; when the
rib is buckled in the trench, the push button is damped and is
positioned in the opening.
8. The chair with a controllable wheel assembly as claimed in claim
1, wherein pushing the push button toward an interior of the
opening, the rib is buckled to the trench of the opening so that
the movement of the movable block is damped and positioned to a
predetermined position so as to control the movement of the wheel
set.
9. The chair with a controllable wheel assembly as claimed in claim
1, wherein when the top seat is below the bottom seat, the top seat
is formed with a receiving space for receiving other objects.
10. The chair with a controllable wheel assembly as claimed in
claim 9, wherein the chair body has a round tapered shape or
polygonal shape.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to chairs, and particularly to
a chair with a controllable wheel assembly, wherein the sliding of
the chair is controllable. When a user sits upon the chair, the
chair can be retained in static state. When it is desired to move
the chair, the wheel set can be controlled to be movable. If the
user treads upon the chair, the chair is adjusted to be
unmovable.
BACKGROUND OF THE INVENTION
[0002] Most of current chairs are not installed with wheel set.
When it is desired to move the chair, it is often that the chair is
moved by the pushing of worker's legs. However, this will make the
chair fall down, or make large noises. This is unsuitable,
especially in plants, stores, or libraries.
[0003] Although many office chairs have been installed with wheel
sets, it will make danger, when the user treads upon the chair for
being at a higher place. The movable wheels at the lower side of
chairs will possibly move to induce dangerous accidents to the
workers. Thus, the wheel is installed with a brake like retaining
structure. The structure is installed with a push button which is
connected to a brake unit for stopping the wheels from rolling.
However, the brake unit is operated by two hands. As the hands hold
other object, the operation can not be performed.
SUMMARY OF THE INVENTION
[0004] Accordingly, the primary object of the present invention is
to provide a chair with a controllable wheel assembly, wherein the
sliding of the chair is controllable. When a user sits upon the
chair, the chair can be retained in static state. When it is
desired to move the chair, the wheel set can be controlled to be
movable. If the user treads upon the chair, the chair is adjusted
to be unmovable.
[0005] To achieve above objects, the present invention provides a
chair with a controllable wheel assembly, comprising: a chair with
a controllable wheel assembly, a chair body having a bottom plate;
the chair body being formed with a plurality of openings; a
plurality of buckling seats having an approximate U shape with two
post; each post of the buckling seat being installed with a guide
groove; a side of the buckling seat being formed with a plurality
of hooks; between each buckling seat and the bottom plate being
formed with a through hole; a plurality of wheel sets being
included; each wheel set having a corresponding buckling seat; each
wheel set having an elastic element and a wheel body; the elastic
element having a U shape; one end of the elastic element being
connected to the wheel body and another end thereof passes through
a corresponding through hole so that the elastic element is
connected to the chair body; and two sides of the movable block
having respective sliding grooves; each sliding groove having a
plurality of notches for receiving the hooks of the buckling seat
so that the movable block is movably combined to the chair body;
thus the movable block is slideable along the guide groove; a stop
block being installed at a lower side of the movable block; a rear
side of the movable block having a push button; the push button
being received in one of the opening of the chair body.
[0006] A bottom of each through hole has at least one recess. The
elastic element has a U shape. The elastic element has at least one
protrusion; when the elastic element passes through the through
hole, the two protrusions are received in the recesses. The end of
the elastic element is screwed to the wheel body. The movable block
has a U shape and each side of the movable block has one of the two
sliding grooves; and a lower side is protruded with the stop
block.
[0007] The push button is installed with at least one rib and an
edge of the opening is formed with at least one trench. When the
rib is buckled in the trench, the push button is damped and is
positioned in the opening. Pushing the push button toward an
interior of the opening, the rib is buckled to the trench of the
opening so that the movement of the movable block is damped and
positioned to a predetermined position so as to control the
movement of the wheel set.
[0008] When the top seat is below the bottom seat, the top seat is
formed with a receiving space for receiving other objects. The
chair body is a round tapered shape or polygonal shape.
[0009] The various objects and advantages of the present invention
will be more readily understood from the following detailed
description when read in conjunction with the appended drawing.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 is an elevational perspective view of the first
embodiment of the present invention.
[0011] FIGS. 2 and 3 are schematic views showing the operation of
the wheel set and the movable block of the present invention.
[0012] FIG. 4 is an elevational view about the bottom seat of the
chair body of the present invention.
[0013] FIG. 5 shows the wheel set of the first embodiment of the
present invention.
[0014] FIG. 6 is a cross sectional view showing the through hole
connected the bottom seat and the bottom plate of the chair
body.
[0015] FIG. 7 is a cross sectional view about the combination of
the through hole and the wheel set of the present invention.
[0016] FIG. 8A shows a perspective view of the movable block of the
present invention.
[0017] FIG. 8B is a perspective view about the opening and the
chair body of the present invention.
[0018] FIG. 8C is a partial enlarged view of FIG. 8B.
[0019] FIGS. 9 and 10 are operational schematic views of the first
embodiment of the present invention.
[0020] FIGS. 11 and 12 are further perspective views of the first
embodiment of the present invention.
[0021] FIGS. 11A and 11B are perspective views about the bottom
seat of the second embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0022] In order that those skilled in the art can further
understand the present invention, a description will be provided in
the following in details. However, these descriptions and the
appended drawings are only used to cause those skilled in the art
to understand the objects, features, and characteristics of the
present invention, but not to be used to confine the scope and
spirit of the present invention defined in the appended claims.
[0023] Referring to FIGS. 1 to 6, the roller set of a chair of the
present invention is illustrated. The present invention has the
following elements.
[0024] A chair body 10 has a bottom plate 101 in an interior of the
chair body 10. The chair body 10 is formed with a plurality of
openings 14. An edge of the opening 14 is formed with at least one
trench 141. The buckling seat 11 is installed at a lower side of
the bottom plate 101 and is connected to the opening 14.
[0025] A plurality of buckling seats 11 have an approximate U shape
with two posts. Each post of the buckling seat 11 is installed with
a guide groove 113. A side of the buckling seat 11 is formed with a
plurality of hooks 111. Between each buckling seat 11 and the
bottom plate 101 is formed with a through hole 12. A bottom of each
through hole 12 has two recesses 121
[0026] A plurality of wheel sets 20 are included. Each wheel set 20
has a corresponding buckling seat 11. Each wheel set 20 has an
elastic element 21 and a wheel body 22 (see FIG. 3). The elastic
element 21 has a U shape. One end of the elastic element 21 is
screwed to the wheel body 22 and another end thereof passes through
a corresponding through hole 12 so that the elastic element 21 is
connected to the chair body 10. The elastic element 21 has two
protrusions 211, referring to FIGS. 5, 6, and 7. When the elastic
element 21 passes through the through hole 12, the two protrusions
211 are received in the recesses 121 so as to have a resisting
effect.
[0027] Referring to FIGS. 8A to 8C, the movable block 30 has a U
shape. Two sides of the movable block 30 have respective sliding
grooves 31. Each sliding groove 31 has a plurality of notches 311
for receiving the hooks 111 of the buckling seat 11 so that the
movable block 30 is movably combined to the chair body 10. Thus the
movable block 30 is slideable along the guide groove 113. A stop
block 32 is installed at a lower side of the movable block 30. A
rear side of the movable block 30 has a push button 33. The push
button 33 is received in one of the opening 14 of the chair body
10. The push button 33 is installed with at least one rib 331.
[0028] Referring to FIGS. 2, 3, 9 and 10, as the rib 331 is buckled
to the trench 141 (referring to FIGS. 3 and 10), when the movable
block 30 is stopped between the chair body 10 and the wheel set 20
and an external force M is applied to the elastic element 21, the
elastic element 21 will be stopped by the movable block 30 so that
it can not deform and the wheel set 20 slides continuously. One the
contrary, see FIGS. 2 and 9, when the rib 331 is pushed out of the
trench 141, if it is not stopped by the movable block 30, the
elastic element 21 deforms due to an external force M, and the
chair body 10 will descend to the ground. Thus the stop block 32 of
the movable block 30 will resist against the wheel set 20 so that
the wheel set 20 cannot rotate. When the external force M is
released, the chair body 10 lifts upwards. The wheel sets 20 will
be in contact with the ground by the elastic resilient force of the
elastic element 21. Thus the chair body 10 can move to other place
by the driving of the legs of the user.
[0029] With reference to FIGS. 11 and 11A, the chair body 10
includes a bottom seat 10a and a top seat 10b. Generally, the top
seat 10b is combined above the bottom seat 10a. When the top seat
10b is below the bottom seat 10a, the top seat 10b is formed with a
receiving space P for receiving other objects.
[0030] Referring to FIG. 12, another embodiment of the present
invention is illustrated. The chair body 10 is a round tapered
shape with wheel sets 20 which has the same effect as the former
embodiment. Furthermore the chair body 10 may have other shapes,
such as polygonal shapes.
[0031] By above mentioned structure, the sliding of the chair is
controllable. When a user sits upon the chair, the chair can be
retained in static state. When it is desired to move the chair, the
wheel set 20 can be controlled to be movable. If the user treads
upon the chair, the chair is adjusted to be unmovable.
[0032] Furthermore the present invention has a simple structure and
it can be assembled easily and conveniently.
[0033] The present invention is thus described, it will be obvious
that the same may be varied in many ways. Such variations are not
to be regarded as a departure from the spirit and scope of the
present invention, and all such modifications as would be obvious
to one skilled in the art are intended to be included within the
scope of the following claims.
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