Folding chair with hidden multi-stage adjustment

Abstract

This invention provides a folding chair with concealed multi-stage adjustment, comprising two handles, two first support rods, a first seat rod, and a second seat rod. The bottom end of each handle is concealed with a guide groove containing a plurality of engaging elements. The top end of each first support rod has a slider and an abutment element correspondingly slidable within the guide groove. When the handle is in an adjusted position, the engaging elements of the guide groove disengage from the abutment elements of the slider, allowing the slider to slide within the guide groove. This, in turn, drives the second seat rod via the first support rod, thereby actuating the first seat rod to adjust the angle between the first and second seat rods. When the handle is reset, the locking element of the guide groove abuts against the abutting element of the slider to position the first support rod, thereby fixing the included angle between the first seat rod and the second seat rod. The included angle between the first seat rod and the second seat rod can be adjusted in multiple stages, allowing the user to adjust the reclining angle according to their seating needs, thus improving the comfort of sitting. Furthermore, by concealing the guide groove, locking element, slider, and abutting element within the handle, not only is the aesthetics improved, but the injury of scratching or pinching hands caused by conventional protruding adjustment pieces can also be effectively prevented, providing excellent safety for use.

Claims

1. A folding chair with concealed multi-stage adjustment, comprising: two handles arranged parallel to each other, each having a guide groove recessed at its bottom end, and a plurality of engaging elements arranged at intervals along the direction of the handles within the guide grooves; each handle being pivotally connected to a first seat rod at one end, the first seat rods being fixedly connected to each other via a crossbar; and two first support rods arranged parallel to each other, each having a slider corresponding to a slider sliding in the guide groove at its top end, the slider having an abutment element corresponding to the engaging element; each of the first support rods being pivotally connected to a second seat rod at its middle section, the second seat rod being pivotally connected to the end of the first seat rod; and each of the first support rods being pivotally connected to a second support rod at its upper end, the second support rod being pivotally connected to either the first seat rod or the second seat rod. Therefore, when the handle is in an adjusted position, the locking element of the guide groove disengages from the abutting element of the slider, allowing the slider to slide in the guide groove. This, in turn, drives the second seat rod through the first support rod, thereby actuating the first seat rod to adjust the angle between the first and second seat rods. When the handle is reset, the locking element of the guide groove abuts against the abutting element of the slider to position the first support rod and thus fix the angle between the first and second seat rods.

2. The folding chair with concealed multi-stage adjustment as described in claim 1, wherein, The handle is recessed at its bottom end and accommodates a slide rail, and the slide rail is provided with the guide groove and the snap-fit ​​element.

3. A folding chair with concealed multi-stage adjustment as described in claim 1, wherein, The snap-fit ​​element is a protrusion disposed on the side wall of the guide groove.

4. A folding chair with concealed multi-stage adjustment as described in claim 1, wherein, The width of the slider and the abutment element is equal to or slightly less than the distance between the inner edges of the guide groove.

5. A folding chair with concealed multi-stage adjustment as described in any one of claims 1 to 4, wherein, At least a portion of the first seat rod and the second seat rod are respectively sleeved within a connecting element.

6. A folding chair with concealed multi-stage adjustment as described in any one of claims 1 to 4, wherein, Between the first support rods, two fixed rods are provided. One end of each fixed rod is pivotally mounted on one of the first support rods, and the other end is pivotally mounted on the second support rod located at the opposite end. The fixed rods are arranged in a cross-pivot configuration.

7. A folding chair with concealed multi-stage adjustment as described in any one of claims 1 to 4, wherein, Between the first seat rods, a reinforcing rod is provided, which is parallel to the crossbar and is fixedly connected to the first seat rod of a different type.

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