Differences in Office Chair Bases
The differences in office chair bases are primarily reflected in design, functionality, and materials, as detailed below:
Single Torsion Spring Base: Commonly found in office chairs priced around 300-400 yuan, such as the JD.COM Jingzao Z5 Pro. Its design features a slender shape with a single torsion spring structure, equipped with two independent control levers for adjusting seat height and backrest recline. The backrest is directly inserted through holes withoutไผธ็ผฉ (this Chinese word means 'telescopic' or 'adjustable in length', but in this context, it might imply no adjustable feature, so we can use 'adjustable' in a negative sense or simply omit a direct translation if it's clear from context) function, offering no resistance adjustment during recline, resulting in a simple structure but limited functionality.
Similar Appearance Bases: Such as those found in the enova Le Xue Pai and Jingzao Z7comfort second generation, these bases have a similar appearance but differ in connection methods. The enova Le Xue Pai has its backrest directly fixed to the seat with screws, where the base serves only as a pressure plate sharing screws without a spring design; the Jingzao Z7comfort second generation may adopt a similar structure with optimized details, relying on screws for overall stability.
Single Spring Lever Control Base: This type achieves backrest locking, height adjustment, and other operations through a single control lever, equipped with a knob to adjust recline force. However, force adjustment is uneven, making it difficult for lighter individuals to recline and strenuous for heavier individuals to rise, suitable for users with low precision requirements for adjustment.
Self-Weight Adjusting Base: Essentially an upgraded version of the dual-spring base, it optimizes the recline resistance issue through independent design. It automatically adjusts the recline force based on the user's weight, improving the uneven resistance phenomenon of traditional spring bases, but not completely solving the root problem, still relying on the spring structure.
Thickened Steel Base: Such as the Sihoo C300 second generation Lite, it uses thickened steel combined with an explosion-proof gas lift, with a load-bearing capacity exceeding 150 kilograms. Its core innovation is the "lumbar-back gliding dynamic support" system, where during recline, the base่ๅจ the lumbar support and backrest to slide synchronously, providing smooth movement and natural support, suitable for heavier individuals or those requiring prolonged recline.
Full Aluminum Alloy Base: Such as the ENOVA Le Wa Alloy Master second generation, it uses lightweight aluminum alloy as the material, balancing strength with a metallic aesthetic appearance. Compared to steel bases, it is lighter but more costly, mostly used in high-end office chairs, suitable for scenarios pursuing portability and aesthetics.
Mechanical Base vs. Cable-Controlled Base: Early office chairs commonly used mechanical bases, achieving functional adjustments through physical levers; cable-controlled bases, on the other hand, connect to control modules via cables, offering more convenient operation (such as one-touch adjustment, hidden control levers). Cable-controlled bases are gradually becoming mainstream, but mechanical bases still hold a place in the low-end market due to their simple structure and ease of maintenance.
