TELESCOPIC ARM FOR A PC TABLE

BRAS TELESCOPIQUE POUR TABLETTE DE SUPPORT D'ORDINATEUR PERSONNEL

English Abstract

Rotating telescopic column that includes an outer sleeve (7) with a number of interior cams, a telescopic sleeve (11) located inside the outer sleeve (7) and that has a corresponding number of outer slots (15), as the cams in the outer sleeve (7) is designed to intervene in the slots (15) in the telescopic sleeve (11) and thereby prevents the telescopic sleeve from turning relative to the outer sleeve, a locking clamping mechanism attached to the outer sleeve (7), and grip the telescopic sleeve (11), and is designed to lock the telescopic sleeve to the outer sleeve when the telescopic sleeve is in a selected position relative to the outer sleeve, an axle (10) located inside the telescopic sleeve (11) and is rotatable in relation to this.

French Abstract

L'invention concerne une colonne téléscopique rotative qui comprend un manchon extérieur (7) pourvu d'un certain nombre de cames intérieures, un manchon téléscopique (11) placé à l'intérieur du manchon extérieur (7) et sur lequel est ménagé un nombre correspondant de fentes extérieures (15), les cames du manchon extérieur (7) étant conçues pour agir dans les fentes (15) ménagées sur le manchon téléscopique (11) de façon à empêcher ce dernier de tourner par rapport au manchon extérieur, un mécanisme de serrage et verrouillage fixé au manchon extérieur (7) et serrant le manchon téléscopique (11), conçu pour verrouiller le manchon téléscopique au manchon extérieur lorsque le manchon téléscopique se trouve dans une position sélectionnée par rapport au manchon extérieur, et enfin, un axe (10) placé à l'intérieur du manchon téléscopique (11) par rapport auquel il pivote.

Claims

4
Claims
1. Rotating telescopic column, comprising:
an outer sleeve (7),
a telescopic sleeve (11) located inside the outer sleeve (7),
a lockable clamp mechanism that is attached to the outer sleeve (7) and grips
the
telescopic sleeve (11) and is designed to lock the telescopic sleeve to the
outer
sleeve when the telescopic sleeve is in a selected position relative to the
outer
sleeve,
a shaft (10) located inside the telescopic sleeve (11) and which is rotatable
in
relation to this,
characterized in that the outer sleeve has a number of internal
cams, said telescopic sleeve has a corresponding number of outer slots (15),
as the
cams in the outer sleeve (7) are designed to intervene in the slots (15) in
the
telescopic sleeve (11) and thereby prevent the telescopic sleeve from turning
relative to the outer sleeve.
2. Rotating telescopic column according to claim 1, where the lockable
clamping mechanism includes a locking sleeve (16) with a number of locking
knobs
(19), as the locking sleeve (16) is attached to the outer sleeve (7), and a
locking
ring (20) arranged to clamp the locking tabs (19) against the telescopic
sleeve
(11).
3. Rotating telescopic column according to claim 1, as it further includes a
number of spring washers (12) arranged between a screw head (13) on shaft (10)
and one end of the telescopic sleeve (11), and which serves to determine the
friction between the shaft and telescopic sleeve.
4. Rotating telescopic column according to claim 1, as it further includes
first
(21) and second (22) end caps mounted on the ends of the telescopic sleeve
(11)
and acts as bearings for the axle (10).
5. Rotating telescopic column according to claim 1, where the telescopic
sleeve
consists of an outer and an inner tube connected by a number of longitudinal
bridges.

4
6. PC table comprising a table top (1) and a fastening mechanism such as a
clamp attachment (6), having a rotatable telescopic column according to one of
claims 1 - 5 is arranged between the table top and the fastening mechanism.

Description

CA 02774880 2012-03-21
WO 2011/049458 1 PCT/N02010/000366
Telescopic arm for a PC table
Technical field
The present invention regards a rotatable telescopic column. The column has a
general
application, but is particularly suitable for use in furniture, and more
specifically in the PC
table.
Background
The applicant markets a PC table which includes a table top that can carry a
computer,
more specifically a laptop computer, often called a laptop. The PC table
includes an arm
that carries the table top itself. The arm is attached to a column that has
adjustable
height and is rotatable, and which in turn is attached to a piece of
furniture. The arm
must be swung in and out of the workspace of the user, so that it easily can
be placed in
the correct working position and can be swung away when not in use. The height
adjust-
able column includes a clamp coupling that locks the column in the desired
height and
with an appropriate friction so that the arm can be rotated. The prior art
column has a
weakness in that the friction does not remain constant during use. Wear occurs
in the
clamp coupling, and it is easily loosened when the joint pivots back and
forth.
It is therefore a need for an improved telescopic bar that is more stable in
use, where the
friction can be easily adjusted, respectively, that can be locked, and where
the settings
are retained over time.
Summary
The present invention is intended to produce such a column. This is achieved
with a tele-
scopic column according to the present invention. The scope of the invention
is shown in
the following patent claims. Specifically, it is arranged a rotatable
telescopic column that
includes an outer sleeve, a telescopic sleeve which is located inside the
outer sleeve, a
locking clip mechanism attached to the outer sleeve and that grabs around the
telescopic
sleeve and is designed to lock the telescopic sleeve to the outer sleeve when
the tele-
scopic sleeve is in a selected position relative to the outer sleeve and a
shaft located in-
side the telescopic sleeve and is rotatable in relation to this. It is thereby
achieved that
the functions for length adjustment and turning of the column are separated
and do not
affect each other. The column is therefore more stable in use. The clamping
mechanism
will not loosen during use, while the turning feature becomes very strong
because of the
continuous shaft.

CA 02774880 2012-03-21
WO 2011/049458 PCT/N02010/000366
2
Brief description of the drawings
An embodiment of the present invention will now be described in detail by
reference to
the enclosed figures, where:
Figure 1 is a drawing of a PC table,
Figure 2 is a perspective sketch of a telescopic column according to the
invention,
Figure 3 shows a cross sectional view through the telescopic column.
Detailed description
Figure 1 shows a PC table including a table top 1. The table top is attached
to a swivel
joint 2, which in turn is attached to an upper arm 3. The upper arm is
attached to a
swivel arm or a telescopic column 4, which in turn is attached to a lower arm
5 and a
clamp attachment 6. The telescopic column 4 may be varied in length, and can
rotate
around the vertical axis with appropriate friction.
The telescopic column 4 includes an outer sleeve 7 which is attached to the
lower arm 5,
and a swivel and clamping mechanism which is located inside the outer sleeve
7. The
inner mechanism is illustrated in Figure 2, as an exploded view. The mechanism
includes
a shaft 10 which is attached to the upper arm 3, for example with threads. The
shaft 10
runs in a telescopic sleeve 11. The shaft is rotatable relative to the sleeve
and the friction
between the shaft and the sleeve is determined by the spring washers 12, which
located
between the screw head 13 on the shaft 10 and the end of the sleeve.
The telescopic sleeve 11 is in the form of a dual walled profile with an outer
and an inner
tube connected in the same hub and a number of longitudinal bridges.
Furthermore the
telescopic sleeve 11 is equipped with a number of longitudinal slots 15 that
are designed
to intervene in the corresponding cams inside the outer sleeve 7. The sleeves
cannot
thereby turn relative to each other. This means that all the turning movement
occurs
between the shaft 10 and the telescopic sleeve 11, while the longitudinal
telescopic
movement occurs between the outer sleeve 7 and the telescopic sleeve 11.
The telescoping column also includes a locking sleeve 16 which is arranged to
be fas-
tened in the outer sleeve 7. The locking sleeve can, for this purpose, include
a knob de-
signed to intervene in a recess, slot or opening in the outer sleeve 7. The
locking sleeve
16 has a number of cams 17 on the inside designed to intervene in the tracks
15 on the
telescopic sleeve, and also include a threaded section 18 on the outside, and
locking
knobs 19. Furthermore, there is a locking ring 20 that is oriented to be
turned on the

CA 02774880 2012-03-21
WO 2011/049458 PCT/N02010/000366
3
locking sleeve 16 and the clamp locking knobs 19 against the telescopic sleeve
11 when
the telescopic column is locked in a particular length. The other details
shown in the fig-
ure may include end caps 21, 22 which act as bearings for the rotary movement,
as well
as the bushings 23, 24, 25.
Figure 3 shows the mechanism in the mounted condition, ready to be put into
the outer
casing and locked to it.
In a simpler version of the PC table, it is conceivable that the telescopic
column is ar-
ranged directly between the clamp attachment 6 and attached to the table top
1.
The telescopic column according to the invention has been described applied to
a PC ta-
ble. However, it may find other applications, such as in a rotating mechanism
for the seat
on a chair, or other general applications outside the furniture industry.

Representative Drawing