Office Chair 509

The term 'Office Chair 509' may involve the following three types of information, as detailed below:

1. Price Range of Jiayi Brand Office Chairs
Among the selected office chairs launched by the Jiayi brand in 2025, some models are priced within the range of 479-509 yuan. These products are ergonomic computer chairs with core features including:

• Long-Sitting Comfort: Designed to distribute body pressure through ergonomic principles, reducing the burden on the lower back during prolonged sitting.
• Lunch Break Recline Function: The chair back can be adjusted to a nearly flat angle, meeting the need for short rests during lunch breaks.
• High Load-Bearing Capacity: The structure is reinforced to accommodate users with larger body weights, extending the chair's service life.
  These products are suitable for office settings or home use where budget is limited but basic functionality is required.

2. Installation Process for Computer Chair Model '509'
There exists a computer chair with the model number '509', whose installation steps are demonstrated in detail through a video. The main process includes:

• Wheel Installation: Insert the five universal wheels vertically into the holes at the bottom of the chair legs, ensuring the clips are fully secured.
• Gas Lift Installation: Align the bottom of the gas lift (height adjustment column) with the center hole of the chair legs and gently press until fully embedded.
• Tray Fixation: Install the chair back adjustment tray (including control buttons) onto the top of the gas lift, paying attention to aligning the direction.
• Back Rod and Seat Connection: Insert the metal rod of the chair back into the fixing slot at the back of the seat and tighten with screws.
• Overall Debugging: After installation, check the flexibility of each component, including height adjustment, tilting, and rotation functions.
  During the installation process, pay attention to the proper use of tools to avoid scratching the chair surface or damaging parts.

3. Promotional Offer for the Ergohuman P1 Chair
The Ergohuman P1 model ergonomic chair has a market price of 649 yuan, but can be reduced to 509 yuan with a coupon. The product features include:

• Material: Made of premium mesh fabric, which offers better breathability than ordinary fabric, suitable for summer or prolonged use scenarios.
• Design: Conforms to ergonomic curves, providing waist and back support to reduce fatigue.
• Scene Adaptation: Suitable for both office and home use, it can be paired with desks or conference tables.
  Promotional offers may vary by platform or time, so it is advisable to confirm the post-coupon price and inventory status before purchasing.

Summary: If you need to purchase an office chair, you can choose from the Jiayi brand or the Ergohuman P1 based on your budget; if you need to install it yourself, refer to the installation video for the chair model '509'; if you are concerned about cost-effectiveness, keep an eye on promotional offers for the Ergohuman P1.