Jason.L Smile & enjoy User manual

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PARTS LIST
Caster x5 Armrest x2
Gast lift x1 Back cushion x1
Allen wrench
Bolts & Washers
1/4*5/8’’mm for armrest
1/4*1’’mm for armrest
M8 x 17mm for backrest
Base x1 Seat cushion x1

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PRODUCT ASSEMBLY INSTRUCTION
STEP 1 STEP 2
STEP 3 STEP 4

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FUNCTION CONTROLS
Armrest height adjustment button
Single rod control lever for seat slide, seat height and B
Backrest tilt tension adjustment handle
1
1
2
2
3
3

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FUNCTION CONTROLS
Backrest tilt angle and tilt
tension adjustment
Arm pad angle adjustment
Arm pad forward and
backward adjustment
Armrest height adjustment
Seat height and depth
adjustment
A
B
C
D
E

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B1 BACKREST TILT ANGLE ADJUSTMENT
Pull the single rod control lever
completely backward and lean
against back until a desired
angle is achieved, and then
return the lever to the original
middle position to lock at an
ideal angle. There are 4
positions with 25° range.
The proper Backrest Angle can
reduce the pressure on the
spine.

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B2 BACKREST TENSION ADJUSTMENT
Swivelling clockwise oe
anti-clockwise the Backrest
esible tilt tension adjust
button, one can enhance or
reduce the tilt tension.
The synchro mechanism is
ergonomically designed to
enhance comfort and reduce
strain. The back-to-seat
adjustment / tilt is 3:1 ratio.

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B3 BACKREST HEIGHT ADJUSTMENT
Sitting on the chair, holding and
pushing up the Backrest height
adjust mechanism, one could
adjust the backrest up or down,
the backrest would be returned
back to the lowest when
pushed to the top. There is
six-position and 6.5cm
adjustable.
It is the best suitable position
that the 3-4 vertebra is
supported on the lumbar-rest
position, and with the especial
contour design, one’s vertebra
could be in the most health
position.
B4 LUMBAR SUPPORT HEIGHT ADJUSTMENT

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C1 ARMREST HEIGHT ADJUSTMENT
Press the two-side armrest
height adjustment buttons to
raise or lower the armrest. There
are 8 positions with 3. 15’’ range.
Recommended armrest
position: Allow arms to rest
comfortably on the armrest at a
90° angle while the armrest is 1’’
higher than the elbow.

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C2 ARM PAD ANGLE ADJUSTMENT
Arm pad angle adjutment: A
range of 15° can be achieved by
swiveling the arm pads inwards.
The best angle could be
reached when the arms can rest
naturally on the arm pads while
working.

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C4 ARM PAD FORWARD AND BACKWARD ADJUSTMENT
Forward and backward
adjustment: push the arm
pads forward or backward to a
desired position. The range for
ir is about 2’’.

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D1 SEAT HEIGHT ADJUSTMENT
Pull up the single rod control
lever and hold it while raising
or lowering the seat to change
the seat height. When the
lever is released, the seat
height is locked.
Since an incorrect seat height
contributes to back’s fatigue,
it is recommended that the
angle of knees is slightly less
than 90° and feet are level
with the oor.

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D2 SEAT DEPTH ADJUSTMENT
Push the single rod control
lever forward to adjust the
seat depth (The approximate
range is 1.97’’). Then the pull is
released, the position will be
xed.
Ideal depth is achieved when
the upper legs are on the seat,
the lumbar area is in touch
with the backrest of the chair,
and the back of knees do not
touch the edge of seat
cushion.