Duorest D2 Series User manual

Limited Warranty
27, Gajaeul-ro 32beon-gil, Seo-gu, Incheon, Korea, 22829
[phone]
DUOBACK CO.,LTD.
THREE YEARS to FIVE YEARS
Beware of armrests from catching fingers when rotating.
It may cause a serious injury.
When a child is using, please teach them the right method of use, and
check if child is using right.
It may cause a serious injury.
It is for one person use only.
The chair may break down, and may cause a serious injury.
Please DO NOT use the chair in place of direct sunlight, using fire.
Risk of fire.
Please DO NOT throw or push the product hard.
It may cause other person a serious injury.
Please DO NOT leave the product inclined area.
The product may be damaged due to impact of fall.
Please DO NOT use chair in humid areas.
If the product slide, it may cause a serious injury.
Please DO NOT use near humidifier.
When using humidifier, the compounds of calcium would vent out dissolved in humidifier, and
may dust the product.
Please put protective mat on top of damageable surfaces.
The surface would be contaminated or damaged.
When washing contaminated fabric, please DO NOT disassemble nor
wash with water.
The appearance of the product may be changed and may be out of order.
If the fabric is contaminated partially, please use neutral detergent to wash out the spots, and
use it when it is completely dried.
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This product is one person use only, and it is recommended to use at
indoor/office/home.
This product is indoor use only.
When you do the maintenance on the chair, please periodically check
fasteners to ensure tightness, and please clean it with vacuum cleaner
or soft fabric
Please use it right.
Exercising on the chair or sleep on the chair may cause a serious injury.
Please DO NOT stand/lean on the chair.
If the chair rotates or fall while you are standing/leaning on the chair, it may cause a serious injury.
Please DO NOT rest your foot on high place while you are seating.
It may cause a serious injury, in case of the chair falls or slides.
Please DO NOT lean back excessively.
It may cause a serious injury, in the case of chair falls.
Please use it right.
If you sit on the backrest, or armrest or other places, it may cause a serious injury.
Please DO NOT push or rotate the chair when the person is sitting.
It may cause a serious injury.
Please DO NOT put your finger into the working parts.
It may cause a serious injury, when the finger is caught in the working part
Make sure DO NOT let children, babies or pets bite/suck the product.
They may cause a suffocation from small parts.
Beware of castors from catching toes.
It may cause a serious injury.
This indicates about incorrect usage of the chair that
may result in serious injury.
This indicates about incorrect usage of the chair that
may result in serious injury or material damage.
Below are Cautions and Warnings while using DUOREST chair
safely and prevent any possible accidents. Please read carefully
and use rightly.
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Safety Instructions
D2 Series
User’s Manual
DUOREST THEORY
Analysis of Human
For right use and maintenance, please read this manual carefully.
DUOREST chairs are designed to relieve pressure on the back and
straightening the spine. This is the “DUOREST Theory” pioneered by
German physicist Dr. Matthias Brunig, which resulted in innovative
chair design based on ergonomics. The DUOREST design is based
on a breakthrough concept and technology with two separate backrests,
adapting easily to any shapes of body and posture reducing the pressure
on the vertebrae up to 30 Kgs. The special rubber connecter reacts
to upper body movements, and our product provides firm support to
the spine. The reason for the space between two separate backrests
is to not getting spinal nervous cords pressured, and to make the chair
perfect, even for people with back issues.
DUOREST gives firm support while you are seated.
Body Frame
Mechanism, Cylinder,
Form, Casters
Flexible Rubber Connector,
Seat Pan Materials
(Mesh, Fabric and Leather)
Backrest Frame, Armrest Frame
and Other Body Frames
Malfunction of Adjusting Height &
Width, Swiveling and Locking
Damage and Discoloration of
Materials
Year
Year
Year

Adjust the height to such an extent that you
want( ), while you pressing the adjusting
button( )
Adjust position you want, holding Armrest
pads.(both height and angle is adjustable)
Please be careful not to pinch your fingers
when you move the Armrest pads.
It applies to the model with adjustable Armrest
Caution
Reference
1
1
2
2
Seat Depth
2
1
Seat Height
2
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What is Self Tilt Tension ?
18
Adjusting Self Tilt Tension
2
1
Headrest Angle/Height/the front and
the rear position
2
1
8
Armrest height/the front and the rear
position/left and right angle adjusting
W(seat width) D(seat depth) H(chair height)
H1076/1205mm
W500mm
D488mm
H828/957mm
W500mm
D488mm
H1076/1205mm
W490mm
D485mm
H828/957mm
W490mm
D485mm
Latex type
Basic type
with Headrest without Headrest
12

D2
Backrest Width/Height adjustment Guide
This product is one-person-use designed, and indoor use (in
office and home).It should not be used outdoors
27, Gajaeul-ro 32beon-gil, Seo-gu, Incheon, Korea, 22829
[phone]
DUOBACK CO.,LTD.
Open the control box cover on the rear of the backrest( ).
Loosen the locking lever by turning it to the left( )
Turning the backrest width control dial ( ) counterclockwise narrows the backrest and
turning it clockwise widens the backrest.
Place the width at the desired position( ).
Tighten the locking lever by turning it to the right( ).
Close the control box( ).
Open the control box cover on the rear of the backrest( ).
Loosen the locking lever by turning it to the left( ).
Push both sides of the backrest height control buttons, while holding the backrest frame by
left hand( ). Then, raise or lower the backrest to the desired position( ).
Tighten the locking lever by turning it to the right( ).
Close the control box( ).
Backrest Height
1
2
5
6
<Part name>
3
4
3
+-
4
+
+-
Backrest Width
1
5
6
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You are recommended to tighten locking lever when it is loosened.
You are recommended to tighten the locking lever when it is loosened.

1.Male
Height Recommended adjustment (Male)
Gradation indicator for backrest width control Gradation indicator for backrest height control
up to 160 cm
(up to 63 inches)
Direction to
2 o’clock 2nd stage
161~168 cm
(63.1~66.1 inches)
Direction to
1 o’clock 2nd stage
169~176 cm
(66.2~69.3 inches)
Direction to
12 o’clock 3rd stage
177~184 cm
(69.4~72.4 inches)
Direction to
10 o’clock 4th stage
over 185 cm
(over 72.5 inches)
Direction to
8 o’clock 5th stage
* According to the gradation indicator for backrest width control, backrest width narrow or widens.
* According to the gradation indicator for backrest height control, you can set the proper height fit for your
body size.
* This guide is only for usual reference because the shape of individual users body varies.
2.Female
Height Recommended adjustment (Female)
Gradation indicator for backrest width control Gradation indicator for backrest height control
up to 150 cm
(up to 59 inches)
Direction to
3 o’clock 1st stage
150~154 cm
(60~60.6 inches)
Direction to
2 o’clock 2nd stage
155~160 cm
(60.7~62.9 inches)
Direction to
1 o’clock 2nd stage
161~169 cm
(63~66.5 inches)
Direction to
12 o’clock 3rd stage
over 170 cm
(over 66.6 inches)
Direction to
11 o’clock 4th stage
* According to the gradation indicator for backrest width control, backrest width narrow or widens.
* According to the gradation indicator for backrest height control, you can set the proper height fit for your
body size.
* This guide is only for usual reference because the shape of individual users body varies.
Guide tips for backrest width / height control