Chair

A chair includes a frame unit including a seat frame, a leg rest that is pivotally mounted to the seat frame, and a rest adjusting mechanism that is connected between the leg rest and the seat frame. The rest adjusting mechanism is convertible between an unlocked state, where the leg rest is permitted to pivot relative to the seat frame, and a locked state, where the leg rest is not permitted to pivot relative to the seat frame.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of the priority date of Chinese Utility Model Patent Application No. 201922377850.4, filed on Dec. 25, 2019.

FIELD

The disclosure relates to a chair, more particularly to a chair with an adjustable leg rest.

BACKGROUND

Those with impaired physical mobility may need to make use of tools such as walkers, walking sticks and wheelchairs in order to move or be moved. A conventional wheelchair supports an assisted person in a sitting position and includes a seat and a leg rest mounted to the seat for the assisted person to rest their legs thereagainst. However, the leg rest of the conventional wheelchair is not movable relative to the seat to adjust an angle between the seat and the leg rest. Thus, the conventional wheelchair cannot achieve support for a variety of positions where the legs of the assisted person are bent at different angles.

SUMMARY

Therefore, the object of the disclosure is to provide a chair which can alleviate the drawback of the prior art.

According to the disclosure, a chair includes a frame unit including a seat frame, a leg rest that is pivotally mounted to the seat frame, and a rest adjusting mechanism that is connected between the leg rest and the seat frame.

The rest adjusting mechanism is convertible between an unlocked state, where the leg rest is permitted to pivot relative to the seat frame, and a locked state, where the leg rest is not permitted to pivot relative to the seat frame.

DETAILED DESCRIPTION

Referring toFIG. 1, an embodiment of a chair1according to the disclosure includes a frame unit10and a wheels unit19. In this embodiment, the chair1is exemplified as a wheelchair. In other embodiments, the chair1may be exemplified as other chairs, such as a stroller, a car seat, or a high chair, and the wheels unit19may be omitted. The frame unit10includes two front legs11, two rear legs12, a back rest13, a seat frame14, a leg rest15that is pivotally mounted to the seat frame14, and a rest adjusting mechanism110that is connected between the leg rest15and the seat frame14. The rest adjusting mechanism110is convertible between an unlocked state, where the leg rest15is permitted to pivot relative to the seat frame14, and a locked state, where the leg rest15is not permitted to pivot relative to the seat frame14.

In this embodiment, the frame unit10further includes a seat adjusting mechanism120, a canopy frame16mounted to the back rest13, and a canopy adjusting mechanism130mounted to the back rest13. The canopy adjusting mechanism130is convertible between an unfastened state, where a height of the canopy frame16relative to the back rest13is permitted to be adjusted, and a fastened state, where the canopy frame16is fixed to the back rest13.

Referring toFIG. 1, the leg rest15has two rest rods151, a horizontal rod152interconnecting the rest rods151, and a pair of foot rests153connected respectively to two ends of the rest rods151. The front legs11are connected pivotally to the seat frame14and proximate to the leg rest15. The rear legs12are disposed at a rear side of the front legs11and connected to the seat frame14. The frame unit10further includes a bottom frame17connected to the front and rear legs11,12. The bottom frame17is substantially rectangular and has a front rod171proximate to the front legs11, a rear rod172proximate to the rear legs12, and two side rods173interconnecting the front and rear rods171,172. The rest adjusting mechanism110is mounted between the front rod171and the horizontal rod152of the leg rest15.

Referring toFIGS. 4, 5 and 6, the rest adjusting mechanism110includes an operating member111, a locking member112, a positioning rod113, a biasing member114, and a mounting casing115. Specifically, the mounting casing115is mounted to a center portion of the front rod171of the bottom frame17, and surrounds the positioning rod113. The operating member111is connected to the locking member112and pivotally connected to the mounting casing115. The biasing member114is connected between the operating member111and the mounting casing115. In this embodiment, the operating member111and the locking member112are molded as one piece, with the locking member112formed on one end of the operating member111. The positioning rod113has a plurality of engaging holes1131and is co-movably and pivotally connected to the horizontal rod152of the leg rest15. Specifically, the positioning rod113has one end pivotally connected to a hinge portion116mounted fixedly to the horizontal rod152. When the rest adjusting mechanism110is in the locked state, the locking member112engages one of the engaging holes1131so that the positioning rod113is not permitted to move relative to the locking member112. When the rest adjusting mechanism110is in the locked state, the operating member111is operable against a resilient force of the biasing member114to disengage the locking member112from the one of the engaging holes1131to convert the rest adjusting mechanism110to the unlocked state to permit movement of the positioning rod113relative to the locking member112and to thereby permit pivot movement of the leg rest15relative to the seat frame14. As such, as shown inFIGS. 2 and 3, an angle of tilt of the leg rest15relative to the seat frame14may be adjusted. In this embodiment, the leg rest15may be secured at a plurality of predetermined angles corresponding respectively to the engaging holes1131. In certain embodiments, the number of the engaging holes1131, and thus of the predetermined angles, may be between 3 and 5.

Referring toFIG. 5, the seat frame14includes inner and outer tubes141,142coupled telescopically to each other, and the seat adjusting mechanism120is mounted to the inner and outer tubes141,142and convertible between an engaging state, where movement between the inner and outer tubes141,142is not allowed, and a disengaging state, where movement between the inner and outer tubes141,142is allowed. Further referring toFIGS. 7, 8, 9 and 12, the seat adjusting mechanism120includes an engaging member1420that is disposed on the outer tube142, a push knob121mounted to the inner tube141, a driving block122, a locking set123, and a connecting rod124interconnecting the push knob121and the driving block122. The locking set123is connected to the inner tube141and engages the engaging member1420. The driving block122is connected to the locking set123, and is operable for disengaging the locking set123from the engaging member1420to convert the seat adjusting mechanism120to the disengaging state.

Specifically, the locking set123includes a fixed member1231mounted to the inner tube141, a locking block1232sandwiched between the driving block122and the fixed member1231, and a locking pin1233. The fixed member1231is formed with a vertical groove1231a, the locking block1232is formed with a through hole1232a, and the driving block122is formed with a guiding groove122aextending obliquely to the vertical groove1231a. The locking pin1233extends sequentially through the guiding groove122aof the driving block122, the through hole1232aof the locking block1232, and the vertical groove1231aof the fixed member1231. The locking pin1233is movable relative to the fixed member1231and the driving block122due to being movably retained in both the guiding groove122aand the vertical groove1231a. The locking block1232is connected co-movably to the locking pin1233. The engaging member1420has a plurality of locking holes1421formed in the outer tube142, and the locking block1232engages one of the locking holes1421of the outer tube142when the seat adjusting mechanism120is in the engaging state. When the seat adjusting mechanism120is in the engaging state, the driving block122is movable relative to the fixed member1231to move the locking pin1233under guidance of the guiding groove122aand the vertical groove1231a, thereby driving the locking block1232to be disengaged from one of the locking holes1421and converting the seat adjusting mechanism120to the disengaging state.

Specifically, the push knob121may be actuated to move the driving block122away from the locking set123via the connecting rod124. Under guidance of the guiding groove122aand the vertical groove1231a, the locking pin1233then moves away from the locking holes1421, which drives the locking block1232to retract between the driving block122and the fixed member1231and disengage from one of the locking holes1421to convert the seat adjusting mechanism120to the disengaging state. Once the inner and outer tubes141,142have been adjusted to a desired configuration, the push knob121may be released so that the driving block122may move back toward the fixed member1231to thereby drive the locking block1232to protrude from between the fixed member1231and the driving block122to thereby engage with one of the locking holes1421and lock the outer tube142relative to the inner tube141.

Referring toFIGS. 10 and 11, the back rest13includes a rest rod13a, and the canopy frame16is mounted to the back rest13via the canopy adjusting mechanism130. In this embodiment, the canopy adjusting mechanism130is two in number, but only one canopy adjusting mechanism.130is discussed hereinafter for conciseness of this disclosure. The canopy adjusting mechanism130includes a surrounding base131surrounding and slidable along the rest rod13a, an actuating member132mounted on the surrounding base131, a resilient member133disposed between the surrounding base131and the actuating member132, and a plurality of positioning holes13bformed on the rest rod13aof the back rest13. When the canopy adjusting mechanism130is in the fastened state, the actuating member132engages one of the positioning holes13b, and is operable against a resilient force of the resilient member133to be disengaged from the one of the positioning holes13bto convert the canopy adjusting mechanism130to the unfastened state, thereby permitting movement of the canopy frame16relative to the rest rod13a.