Shintenchi Ergonomic Office Chair STC-BGY001-OFCH User Manual

1. Introduction

Thank you for choosing the Shintenchi Ergonomic Office Chair. This manual provides essential information for the proper assembly, operation, and maintenance of your new chair. Please read these instructions carefully before use to ensure safe and efficient operation. This chair is designed to provide comfort and support for extended periods of sitting, featuring adjustable lumbar support, a breathable mesh back, and a high-quality construction.

Image 1.1: Shintenchi Ergonomic Office Chairs in a modern office environment, showcasing their design and suitability for various workspaces.

2. Safety Information

Always follow basic safety precautions when using this product to reduce the risk of injury. Keep this manual for future reference.

• Ensure all components are securely fastened before use. Periodically check and tighten all screws and bolts.
• Do not stand on the chair. Use it only for sitting.
• Do not use the chair if any parts are damaged or missing. Contact customer support for replacement parts.
• Keep children away from the chair during assembly and adjustment to prevent injury.
• Do not exceed the maximum weight capacity of 330 lbs (150 kg).
• Avoid placing the chair near heat sources or in direct sunlight for prolonged periods to prevent material degradation.

3. Parts List

Before assembly, verify that all parts are present and undamaged. If any parts are missing or damaged, please contact Shintenchi customer service.

• Backrest Assembly (Mesh Back with Headrest)
• Seat Cushion
• Armrests (2)
• Gas Lift Cylinder
• Base (5-star)
• Casters (5)
• Mechanism Plate
• Hardware Kit (Screws, Washers, Allen Wrench)

4. Setup and Assembly

Follow these steps carefully to assemble your Shintenchi Ergonomic Office Chair. It is recommended to assemble the chair on a soft, clean surface to prevent damage.

1. Attach Casters to Base: Insert each of the five casters into the holes at the end of each leg of the 5-star base until they click securely into place.
2. Insert Gas Lift: Place the gas lift cylinder into the center hole of the assembled base. Ensure it sits firmly.
3. Attach Mechanism Plate to Seat: Align the mechanism plate with the screw holes on the underside of the seat cushion. Secure it with the provided screws, ensuring the front of the mechanism faces the front of the seat.
4. Attach Armrests to Seat: Secure the armrests to the sides of the seat cushion using the designated screws. Do not overtighten initially.
5. Attach Backrest to Seat: Connect the backrest to the mechanism plate or the rear of the seat cushion using the appropriate screws. Ensure a firm connection.
6. Connect Seat Assembly to Gas Lift: Carefully place the assembled seat onto the gas lift cylinder, ensuring the tapered end of the gas lift fits into the mechanism plate's opening. Press down firmly to secure.
7. Final Tightening: Once all parts are assembled, go back and securely tighten all screws.

Image 4.1: Close-up view of the smooth, silent casters designed for various floor types, highlighting their ease of installation and durability.

5. Operating Instructions

Your Shintenchi Ergonomic Office Chair offers multiple adjustments to customize your seating experience for optimal comfort and support.

5.1. Seat Height Adjustment

To adjust the seat height, locate the lever on the right side, under the seat. While seated, pull the lever up to lower the seat. To raise the seat, stand up slightly and pull the lever up. Release the lever at the desired height.

5.2. Backrest Recline and Tilt-Lock

The chair features a 90°–135° backrest tilt. To recline, pull the lever on the left side, under the seat, outwards. Lean back to the desired angle and push the lever inwards to lock the position. To unlock, pull the lever outwards again.

Image 5.1: Visual guide demonstrating the chair's recline and tilt-rock capabilities, along with height and tension adjustments.

5.3. Tilt Tension Adjustment

Adjust the resistance of the recline function by turning the round knob located under the seat, at the front of the mechanism plate. Turn clockwise to increase tension (harder to recline) and counter-clockwise to decrease tension (easier to recline).

5.4. Adjustable Lumbar Support

The lumbar support can be adjusted both vertically and in depth. To adjust the height, gently push the lumbar support up or down. To adjust the depth (forward/backward), rotate the knob located on the side of the lumbar support.

Image 5.2: Detailed illustration of the adjustable lumbar support, showing how to move it forward/backward and up/down for personalized comfort.

5.5. Headrest Adjustment

The headrest can be adjusted vertically to provide optimal neck support. Simply grasp the headrest and slide it up or down to your preferred position.

5.6. Armrest Height Adjustment

To adjust the height of the armrests, press the button located on the side of each armrest post. While holding the button, move the armrest up or down. Release the button to lock it in place.

6. Maintenance

Regular maintenance will help prolong the life and appearance of your Shintenchi Ergonomic Office Chair.

• Cleaning: For the mesh back and fabric seat, use a soft cloth dampened with mild soap and water. Avoid harsh chemicals or abrasive cleaners. For the plastic and metal parts, wipe with a damp cloth.
• Inspection: Periodically check all screws and bolts to ensure they are tight. Retighten as necessary to maintain stability and safety.
• Caster Care: Keep the casters free of hair and debris to ensure smooth movement. You can use a small brush or vacuum cleaner to clean them.
• Lubrication: The gas lift mechanism is sealed and does not require lubrication. If you notice squeaking, check for loose connections in the base or seat assembly.

7. Troubleshooting

If you encounter issues with your chair, refer to the following common problems and solutions.

• Chair Squeaks:
  Solution: Check all screws and bolts, especially where the backrest meets the seat and the mechanism plate attaches to the seat. Tighten any loose fasteners. A small amount of silicone spray on moving metal parts (avoiding the gas lift cylinder) may help.
• Chair Does Not Adjust Height:
  Solution: Ensure the height adjustment lever is fully engaged. Check if the gas lift cylinder is properly seated in the base and mechanism. If the gas lift is faulty, it may need replacement.
• Casters Do Not Roll Smoothly:
  Solution: Inspect casters for trapped debris (hair, lint). Clean them thoroughly. Ensure casters are fully inserted into the base.
• Backrest Does Not Recline or Lock:
  Solution: Verify that the recline/tilt-lock lever is functioning correctly and not obstructed. Check the tilt tension knob; if it's too tight, the backrest may not recline easily.

8. Specifications

Image 8.1: Detailed product dimensions, including height, width, depth, and maximum load capacity of 330 lbs.

9. Warranty Information

Shintenchi products are manufactured to high-quality standards. For specific warranty details regarding your Ergonomic Office Chair, please refer to the warranty card included with your purchase or visit the official Shintenchi website. The warranty typically covers manufacturing defects under normal use.

10. Customer Support

If you have any questions, require assistance with assembly, or need replacement parts, please contact Shintenchi customer support. Have your model number (STC-BGY001-OFCH) and purchase information ready when contacting support.

Shintenchi Official Website: Visit the Shintenchi Store on Amazon