| 摘要 |
A waistrest assembly comprises two adjusting seats securely attached to two lateral sides of a backrest, respectively, two connecting blocks, and a waistrest. Each adjusting seat includes a vertical guide slot. Each connecting block is snugly held in and slidable along an associated vertical guide slot. The waistrest comprises a support plate and a pad securely attached to a side of the support plate. The support plate includes a connecting portion in each of two ends thereof. A fastener is extended through an associated connecting block and an associated connecting portion to thereby secure the support plate and the connecting block together. The connecting blocks are movable in the vertical guide slots to thereby adjust a vertical position of the pad of the waistrest.
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