Various systems and methods relate to an adaptive chair system having (i) a stowed mode in which members of the chair frame are compactly contained within a multi-function bag (MFB), and (ii) a deployed mode in which the multi-purpose chair is configured to transition between at least two seating modes. In an illustrative example, the chair may be provided with an adaptive frame which may be reconfigured to transition between the seating modes. For example, the chair may transition between any of a vertical/upright (chair) mode (e.g., FIG. 8B), a vertical/upright (chair) mode using trek pole handle segment(s) (e.g., FIG. 1C), a low-profile/recon (seat) mode (e.g., FIG. 2B), and a longitudinal/lounge mode (e.g., FIG. 2B). Various embodiments may advantageously provide an adaptive chair system in an ultralight form factor which may fulfill multiple functions including, by way of example and not limitation, seating, sun/rain canopy, footrest, or some combination thereof.

A foldable chair, comprises a foldable chair frame (10) and a chair seat (1) made of a flexible material; the chair frame (10) comprising an X-shaped left support frame (101), an X-shaped right support frame (102) connected through a connecting crossbar (3), the chair seat (1) is connected to the chair frame (10) through a plurality of connecting pieces; a detachable pole (2) extends from top to bottom of the chair frame (10), and the connecting crossbar (3) has two first through holes (34) for the poles (2) to pass through; correspondingly, the connecting crossbar (3) has two second through holes (33) for a plurality of support tubes (100) to pass through; each pole (2) and the corresponding support tube (100) forms the X-shaped left or right support frame. This chair has the advantages of simple and reasonable structure, easy installation and disassembly, simple manufacture process and low cost, and is especially suitable for carrying around when traveling.

A foldable chair, comprises a foldable chair frame (10) and a chair seat (1) made of a flexible material; the chair frame (10) comprising an X-shaped left support frame (101), an X-shaped right support frame (102) connected through a connecting crossbar (3), the chair seat (1) is connected to the chair frame (10) through a plurality of connecting pieces; a detachable pole (2) extends from top to bottom of the chair frame (10), and the connecting crossbar (3) has two first through holes (34) for the poles (2) to pass through; correspondingly, the connecting crossbar (3) has two second through holes (33) for a plurality of support tubes (100) to pass through; each pole (2) and the corresponding support tube (100) forms the X-shaped left or right support frame. This chair has the advantages of simple and reasonable structure, easy installation and disassembly, simple manufacture process and low cost, and is especially suitable for carrying around when traveling.

Embodiments of chair systems incorporating trekking poles include a low-back design employing fixed-length trekking poles, and a high-back design employing adjustable-length trekking poles that allow for adjusting the recline angle of the chair. The chair system generally includes a tubular frame that releasably engages a flexible seat. The tubular frame includes a front hub and a rear hub spaced one from the other by a cross bar, plus front and rear footings which stabilize the chair system on the ground or undersurface. A V-shaped upper support extending from the front hub supports and holds open the leg portion of the flexible seat, while the trekking poles are releasably engaged with and extend upwardly from the rear hub to support, and hold open and upright the back portion of the flexible seat.

A conversion kit for converting a pair of standard trekking poles into a camp chair consists of two corner brackets, two cross brackets, two compression brackets, and a fabric sling for a seat. Standard trekking poles have 3 segments that combine together, a handle segment, a middle segment and a tip segment. The corner brackets connect the two tip segments, and one of the middle segments. The cross brackets connect the two handle segments to the two tip segments. The compression bracket connects the two handle segments to the other middle segment. The fabric sling is attached to the two middle segments, and the two tip segments.

A conversion kit for converting a pair of standard trekking poles into a camp chair consists of two corner brackets, two cross brackets, two compression brackets, and a fabric sling for a seat. Standard trekking poles have 3 segments that combine together, a handle segment, a middle segment and a tip segment. The corner brackets connect the two tip segments, and one of the middle segments. The cross brackets connect the two handle segments to the two tip segments. The compression bracket connects the two handle segments to the other middle segment. The fabric sling is attached to the two middle segments, and the two tip segments.

Embodiments of chair systems incorporating trekking poles include a low-back design employing fixed-length trekking poles, and a high-back design employing adjustable-length trekking poles that allow for adjusting the recline angle of the chair. The chair system generally includes a tubular frame that releasably engages a flexible seat. The tubular frame includes a front hub and a rear hub spaced one from the other by a cross bar, plus front and rear footings which stabilize the chair system on the ground or undersurface. A V-shaped upper support extending from the front hub supports and holds open the leg portion of the flexible seat, while the trekking poles are releasably engaged with and extend upwardly from the rear hub to support, and hold open and upright the back portion of the flexible seat.

A backpack seat configured for allowing a user to sit in a chair like device while wearing the backpack. The backpack seat includes a tethering system configured for attaching to a backpack. The tethering system includes a plurality of straps that are can be adjustable and configured to attach to a variety of backpacks. A seat is attached to the bottom of the tethering system. At least one receiving cup is attached to the tethering system. The receiving cups are configured for receiving a first support rod and a second support rod. The backpack seat allows a user wearing a backpack to comfortable sit in the seat with the support from the support rods inserted into the receiving cups.

A backpack seat configured for allowing a user to sit in a chair like device while wearing the backpack. The backpack seat includes a tethering system configured for attaching to a backpack. The tethering system includes a plurality of straps that are can be adjustable and configured to attach to a variety of backpacks. A seat is attached to the bottom of the tethering system. At least one receiving cup is attached to the tethering system. The receiving cups are configured for receiving a first support rod and a second support rod. The backpack seat allows a user wearing a backpack to comfortable sit in the seat with the support from the support rods inserted into the receiving cups.

A foldable supporting device includes a linkage unit, a supporting unit and a converting unit. The supporting unit includes a main supporting member that has a first main supporting surface, and at least one auxiliary supporting member that has a first auxiliary supporting surface. The converting unit has at least one converting part that is drivable by movement of the linkage unit to convert the supporting unit between a folded state in which the first main supporting surface and the first auxiliary supporting surface cooperatively form a first angle, and an unfolded state in which the first main supporting surface and the first auxiliary supporting surface cooperatively form a second angle.