This document serves as an instruction manual for the C-3718 office chair, providing comprehensive guidance on assembly, safe usage, and maintenance.
Function Description:
The C-3718 is an office chair designed for comfortable seating during work or leisure. Its primary function is to provide ergonomic support and adjustability to accommodate various user preferences and body types. The chair features a backrest, seat, armrests, gas lift for height adjustment, a five-star base with casters for mobility, and a mechanism that allows for recline and tilt functions. The design emphasizes user comfort and support, aiming to reduce strain during prolonged sitting.
Important Technical Specifications:
The chair's components are clearly itemized in the "Package List" section, indicating the quantity and type of each part required for assembly.
- Backrest (A): 1 unit
- Seat (B): 1 unit
- Armrests (C): 1L (Left) and 1R (Right) unit, totaling 2 armrests. These are crucial for upper body support and are installed on both the backrest and the seat.
- Mechanism (D): 1 unit. This component is central to the chair's adjustability, enabling tilt and recline functions. It connects the seat to the gas lift.
- Gas Lift (E): 1 unit. This is a hydraulic cylinder that allows for smooth height adjustment of the chair.
- Base (F): 1 unit. This is the five-star base that supports the entire chair structure.
- Legs (G): 5 units. These are the individual spokes of the five-star base, into which the casters are inserted.
- Casters (H): 5 units. These are the wheels that attach to the legs, providing mobility to the chair.
- Bolts: Various types and quantities are provided for secure assembly:
- (I)*4 Bolts: Used for attaching armrests to the backrest.
- (J)*6 Bolts: Used for attaching armrests to the seat.
- (K)*10 Bolts: Used for securing the legs to the base.
- (L)*4 Bolts: Used for attaching the mechanism to the seat.
- Wrench (M): 1 unit. An essential tool provided for tightening all bolts during assembly.
The assembly process involves several steps, ensuring a sturdy and functional chair:
- Base Assembly: The five legs (G) are inserted into the base (F) and secured with 10 bolts (K) using the wrench (M).
- Caster Installation: The five casters (H) are pressed into the ends of the legs (G).
- Gas Lift Insertion: The gas lift (E) is inserted into the assembled base (F).
- Backrest and Armrest Connection (Part 1): The armrests (C) are attached to the backrest (A) using 4 bolts (I). It's noted that these bolts should initially be tightened only to 50% to allow for adjustment. The armrests are marked "L" and "R" for correct orientation.
- Seat and Armrest Connection (Part 2): The armrests (C) are then attached to the seat (B) using 6 bolts (J). The seat (B) is marked "FRONT" to ensure correct installation direction.
- Mechanism Attachment: The mechanism (D) is attached to the seat (B) using 4 bolts (L). The "FRONT" direction of the mechanism must align with the seat's "FRONT" direction.
- Final Assembly and Tightening: The assembled seat/backrest/armrest unit is placed onto the gas lift (E). All previously installed bolts (I) on the armrests are then fully tightened to 100%. The chair is pressed down until it is fully secured onto the gas lift.
- Completion: The assembly process is finished once all components are securely in place.
Usage Features:
The manual provides clear instructions and illustrations for proper and safe usage:
- Correct Sitting Posture: Users should sit in the center of the chair with their back against the backrest.
- Mobility: The chair is equipped with casters for easy movement.
- Recline Function: The chair allows for reclining, as indicated by the illustrations showing a person leaning back.
- Height Adjustment: The gas lift enables easy adjustment of the chair's height.
The manual emphasizes several critical safety points to prevent injury and damage to the chair:
- Centered Sitting: Always sit in the center of the chair, with your back to the backrest.
- Avoid Front Edge Sitting: Do not sit on the front edge of the chair, as this can lead to instability and falls.
- No Standing: Do not stand on the chair.
- Single Person Use: The chair is designed for use by one person only.
- Avoid Pushing While Occupied: Do not push the chair around when someone is sitting in it.
- No Excessive Force on Backrest: Do not push down on the backrest when a person is reclined, as this could damage the mechanism or cause the chair to tip.
- Even Weight Distribution: Do not place all your weight on only the backrest.
Maintenance Features:
Proper maintenance is crucial for extending the life of the chair and ensuring continued safe operation:
- Deodorizing Leather: For new chairs, if there is a leather odor, leave the chair in a shady outdoor area for 1-2 days to deodorize.
- Regular Bolt Tightening: For longer use, re-tighten all bolts every 6 months using the provided allen-key. This is a critical step to maintain the chair's stability and prevent loosening of components.
- Manual Tightening: It is explicitly stated that using an electric drill for tightening bolts can damage the chair. All bolts should be re-tightened manually.
- Pre-Use Check: Before using the chair, always check to ensure that all bolts are fully tightened.
- Lubrication: All moving parts should be lubricated, and all bolts should be tightened every 6 months or whenever needed. This ensures smooth operation and prevents wear and tear.
In summary, the C-3718 office chair is a user-friendly and adjustable seating solution, with a strong emphasis on safe assembly, proper usage, and regular maintenance to ensure longevity and user well-being.
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