Folding chair

A folding chair includes a left lateral folding mechanism, a left handrail mechanism, a right lateral folding mechanism, a right handrail mechanism, a front supporting mechanism, a rear supporting mechanism and a load-bearing structure. Therefore, the folding chair can be folded up like an umbrella and thus takes up little space and is portable and can be unfolded to demonstrate high stability and high load-bearing capability.

CROSS-REFERENCE TO RELATED APPLICATION

This non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No(s). 107147385 filed in Taiwan, R.O.C. on Dec. 27, 2018, the entire contents of which are hereby incorporated by reference.

FIELD OF THE INVENTION

The present disclosure relates to folding chairs and, more particularly, to a folding chair not only capable of being folded and stored but also capable of being unfolded and used.

BACKGROUND OF THE INVENTION

A conventional folding chair consists of a frame, two legs, a pad and a back rest. The legs movably cross the frame to fit thereto. The pad movably fits to the frame. The back rest is mounted on the top of the frame. Therefore, the legs and the pad are unfolded on one side of the frame such that a sitter can sit on the pad. Alternatively, the legs and the pad can press against each other toward the frame, thereby allowing the folding chair to be folded.

However, the conventional folding chair has drawbacks described below. Folding the conventional folding chair involves pressing the legs and the pad against each other toward the frame; as a result, the width of the frame and the width of the pad remain unchanged, regardless of whether the conventional folding chair is folded or unfolded, and thus the conventional folding chair takes up much space and is not portable. Furthermore, after the folding chair has been unfolded, only the bottom of the frame and the legs are in contact with the ground to bear the weight of the folding chair, thereby compromising the stability and load-bearing capability of the folding chair.

Therefore, it is imperative to provide a folding chair which can be folded up like an umbrella and thus takes up little space and is portable and can be unfolded to demonstrate high stability and high load-bearing capability.

SUMMARY OF THE INVENTION

In view of the aforesaid drawbacks of the prior art, it is an objective of the present disclosure to provide a folding chair which can be folded up like an umbrella and thus takes up little space and is portable and can be unfolded to demonstrate high stability and high load-bearing capability.

In order to achieve the above and other objectives, the present disclosure provides a folding chair comprising a left lateral folding mechanism, a left handrail mechanism, a right lateral folding mechanism, a right handrail mechanism, a front supporting mechanism, a rear supporting mechanism and a load-bearing structure. The left lateral folding mechanism comprises a left frame rod, a left frame rotating element, a left rear leg sliding element, a left rear leg rod, a left rear leg fixing element, a left back rest rod, a left back rest rod sliding element, a left front leg rod, a left front leg terminal, a left connecting rod and a left rear leg terminal. The left frame rotating element being movably coupled to the vicinity of one end of the left frame rod, the left rear leg sliding element being movably coupled to the other end of the left frame rod, the left rear leg rod being movably, penetratingly disposed at the left rear leg sliding element, the left rear leg fixing element being movably coupled to one end of the left rear leg rod, the left back rest rod having one end movably coupled to the left frame rod, the left rear leg fixing element being disposed at the vicinity of one end of the left back rest rod, the left back rest rod sliding element being movably fitted to the left back rest rod, the left front leg rod having one end movably coupled to the left back rest rod sliding element, the left front leg terminal being movably coupled to the other end of the left front leg rod, the left connecting rod having one end movably coupled to the left rear leg rod, the left connecting rod having the other end movably coupled between the left frame rod and the left front leg rod, the left rear leg terminal being movably coupled to the other end of the left rear leg rod; the left handrail mechanism being connected to the left lateral folding mechanism, the left handrail mechanism comprising a left handrail rod, a left handrail fixing element, a left handrail supporting rod and a left supporting rod sliding element, the left handrail rod having one end movably coupled to the left back rest rod, the left frame rotating element being disposed at the left handrail supporting rod, the left handrail fixing element being disposed at the vicinity of the other end of the left handrail rod, the left handrail supporting rod having one end movably coupled to the left handrail fixing element, the left supporting rod sliding element being coupled to the other end of the left handrail supporting rod, the left supporting rod sliding element being movably fitted to the left front leg rod; the right lateral folding mechanism being opposingly disposed on one side of the left lateral folding mechanism, the right lateral folding mechanism comprises a right frame rod, a right frame rotating element, a right rear leg sliding element, a right rear leg rod, a right rear leg fixing element, a right back rest rod, a right back rest rod sliding element, a right front leg rod, a right front leg terminal, a right connecting rod and a right rear leg terminal, the right frame rotating element being movably coupled to the vicinity of one end of the right frame rod, the right rear leg sliding element being movably coupled to the other end of the right frame rod, the right rear leg rod being movably, penetratingly disposed at the right rear leg sliding element, the right rear leg fixing element being movably coupled to one end of the right rear leg rod, the right back rest rod having one end movably coupled to the right frame rod, the right rear leg fixing element being disposed at the vicinity of one end of the right back rest rod, the right back rest rod sliding element being movably fitted to the right back rest rod, the right front leg rod having one end movably coupled to the right back rest rod sliding element, the right front leg terminal being movably coupled to the other one end of the right front leg rod, the right connecting rod having one end movably coupled to the right rear leg rod, the right connecting rod having the other end movably coupled between the right frame rod and the right front leg rod, the right rear leg terminal being movably coupled to the other end of the right rear leg rod; the right handrail mechanism being connected to the right lateral folding mechanism and opposing the left handrail mechanism, the right handrail mechanism comprising a right handrail rod, a right handrail fixing element, a right handrail supporting rod and a right supporting rod sliding element, the right handrail rod having one end movably coupled to the right back rest rod, the right frame rotating element being disposed at the right handrail supporting rod, the right handrail fixing element being disposed at the vicinity of the other end of the right handrail rod, the right handrail supporting rod having one end movably coupled to the right handrail fixing element, the right supporting rod sliding element being coupled to the other end of the right handrail supporting rod, and the right supporting rod sliding element being movably fitted to the right front leg rod; the front supporting mechanism being disposed between the left lateral folding mechanism and the right lateral folding mechanism, the front supporting mechanism comprising a first front supporting rod and a second front supporting rod, wherein the first front supporting rod and the second front supporting rod cross each other so as to be movably coupled together, the first front supporting rod having one end movably coupled to the left frame rotating element, the first front supporting rod having the other end movably coupled to the right front leg terminal, the second front supporting rod having one end movably coupled to the right frame rotating element, the second front supporting rod having the other end movably coupled to the left front leg terminal; the rear supporting mechanism being disposed between the left lateral folding mechanism and the right lateral folding mechanism, the rear supporting mechanism comprising a first rear supporting rod and a second rear supporting rod, wherein the first rear supporting rod and the second rear supporting rod cross each other so as to be movably coupled together, the first rear supporting rod having one end movably coupled to the left back rest rod sliding element, the first rear supporting rod having the other end movably coupled to the right rear leg terminal, the second rear supporting rod having one end movably coupled to the right back rest rod sliding element, the second rear supporting rod having the other end movably coupled to the left rear leg terminal; the load-bearing structure being disposed at the left lateral folding mechanism and the right lateral folding mechanism.

In an embodiment of the folding chair, the left frame rotating element has a first pivotal connection portion and a first straddling portion, the first straddling portion being disposed on the top surface of the first pivotal connection portion, the first front supporting rod having one end movably coupled to the first pivotal connection portion, and the left frame rod being movably coupled to the first straddling portion.

In an embodiment of the folding chair, the left rear leg sliding element has a first fitting portion and a second pivotal connection portion, the second pivotal connection portion being disposed at one end of the first fitting portion, the left rear leg rod being movably, penetratingly disposed at the first fitting portion, and the left frame rod having the other end movably coupled to the second pivotal connection portion.

In an embodiment of the folding chair, the left rear leg fixing element has a second securing portion and a third pivotal connection portion, the second securing portion being disposed at one end of the third pivotal connection portion, the second securing portion being coupled to the vicinity of one end of the left back rest rod, and the left rear leg rod having one end movably coupled to the third pivotal connection portion.

In an embodiment of the folding chair, the left back rest rod sliding element has a second fitting portion, a fourth pivotal connection portion and a fifth pivotal connection portion, the fourth pivotal connection portion being disposed at one end of the second fitting portion, the fifth pivotal connection portion being disposed on one side of the second fitting portion, the left back rest rod being movably, penetratingly disposed at the second fitting portion, the left front leg rod having one end movably coupled to the fourth pivotal connection portion, and the first rear supporting rod having one end movably coupled to the fifth pivotal connection portion.

In an embodiment of the folding chair, the right frame rotating element has a sixth pivotal connection portion and a second straddling portion, the second straddling portion being disposed on the top surface of the sixth pivotal connection portion, the second front supporting rod having one end movably coupled to the sixth pivotal connection portion, and the right frame rod being movably coupled to the second straddling portion.

In an embodiment of the folding chair, the right rear leg sliding element has a third fitting portion and a seventh pivotal connection portion, the seventh pivotal connection portion being disposed at one end of the third fitting portion, the right rear leg rod being movably, penetratingly disposed at the third fitting portion, and the right frame rod having the other end movably coupled to the seventh pivotal connection portion.

In an embodiment of the folding chair, the right rear leg fixing element has a fourth securing portion and an eighth pivotal connection portion, the fourth securing portion being disposed at one end of the eighth pivotal connection portion, the fourth securing portion being coupled to the vicinity of one end of the right back rest rod, and the right rear leg rod having one end movably coupled to the eighth pivotal connection portion.

In an embodiment of the folding chair, the right back rest rod sliding element has a fourth fitting portion, a ninth pivotal connection portion and a tenth pivotal connection portion, the ninth pivotal connection portion being disposed at one end of the fourth fitting portion, the tenth pivotal connection portion being disposed on one side of the fourth fitting portion, the right back rest rod being movably, penetratingly disposed at the fourth fitting portion, the right front leg rod having one end movably coupled to the ninth pivotal connection portion, and the second rear supporting rod having one end movably coupled to the tenth pivotal connection portion.

In an embodiment of the folding chair, the load-bearing structure comprises a sitting portion and a back rest portion, the sitting portion being disposed at the left frame rod and the right frame rod, the back rest portion being disposed at the left back rest rod and the right back rest rod, and the back rest portion being connected to the sitting portion.

Therefore, the folding chair of the present disclosure can be folded up like an umbrella and thus takes up little space and is portable and can be unfolded to demonstrate high stability and high load-bearing capability.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Objectives, features, and advantages of the present disclosure are hereunder illustrated with specific embodiments, depicted with drawings, and described below.

Referring toFIG. 1throughFIG. 4, the present disclosure provides a folding chair comprising a left lateral folding mechanism10, a left handrail mechanism20, a right lateral folding mechanism30, a right handrail mechanism40, a front supporting mechanism50, a rear supporting mechanism60and a load-bearing structure70.

The left lateral folding mechanism10comprises a left frame rod101, a left frame rotating element102, a left rear leg sliding element103, a left rear leg rod104, a left rear leg fixing element105, a left back rest rod106, a left back rest rod sliding element107, a left front leg rod108, a left front leg terminal109, a left connecting rod110and a left rear leg terminal111. The left frame rotating element102is movably coupled to the vicinity of one end of the left frame rod101. The left rear leg sliding element103is movably coupled to the other end of the left frame rod101. The left rear leg rod104is movably, penetratingly disposed at the left rear leg sliding element103. The left rear leg fixing element105is movably coupled to one end of the left rear leg rod104. The left back rest rod106has one end movably coupled to the left frame rod101. The left rear leg fixing element105is disposed at the vicinity of one end of the left back rest rod106. The left back rest rod sliding element107is movably fitted to the left back rest rod106. The left front leg rod108has one end movably coupled to the left back rest rod sliding element107. The left front leg terminal109is movably coupled to the other end of the left front leg rod108. The left connecting rod110has one end movably coupled to the left rear leg rod104. The left connecting rod110has the other end movably coupled between the left frame rod101and the left front leg rod108. The left rear leg terminal111is movably coupled to the other end of the left rear leg rod104.

The left handrail mechanism20is connected to the left lateral folding mechanism10. The left handrail mechanism20comprises a left handrail rod201, a left handrail fixing element202, a left handrail supporting rod203and a left supporting rod sliding element204. The left handrail rod201has one end movably coupled to the left back rest rod106. The left frame rotating element102is disposed at the left handrail supporting rod203. The left handrail fixing element202is disposed at the vicinity of the other end of the left handrail rod201. The left handrail supporting rod203has one end movably coupled to the left handrail fixing element202. The left supporting rod sliding element204is coupled to the other end of the left handrail supporting rod203. The left supporting rod sliding element204is movably fitted to the left front leg rod108.

The right lateral folding mechanism30is opposingly disposed on one side of the left lateral folding mechanism10. The right lateral folding mechanism30comprises a right frame rod301, a right frame rotating element302, a right rear leg sliding element303, a right rear leg rod304, a right rear leg fixing element305, a right back rest rod306, a right back rest rod sliding element307, a right front leg rod308, a right front leg terminal309, a right connecting rod310and a right rear leg terminal311. The right frame rotating element302is movably coupled to the vicinity of one end of the right frame rod301. The right rear leg sliding element303is movably coupled to the other end of the right frame rod301. The right rear leg rod304is movably, penetratingly disposed at the right rear leg sliding element303. The right rear leg fixing element305is movably coupled to one end of the right rear leg rod304. The right back rest rod306has one end movably coupled to the right frame rod301. The right rear leg fixing element305is disposed at the vicinity of one end of the right back rest rod306. The right back rest rod sliding element307is movably fitted to the right back rest rod306. The right front leg rod308has one end movably coupled to the right back rest rod sliding element307. The right front leg terminal309is movably coupled to the other end of the right front leg rod308. The right connecting rod310has one end movably coupled to the right rear leg rod304. The right connecting rod310has the other end movably coupled between the right frame rod301and the right front leg rod308. The right rear leg terminal311is movably coupled to the other end of the right rear leg rod304.

The right handrail mechanism40is connected to the right lateral folding mechanism30and opposes the left handrail mechanism20. The right handrail mechanism40comprises a right handrail rod401, a right handrail fixing element402, a right handrail supporting rod403and a right supporting rod sliding element404. The right handrail rod401has one end movably coupled to the right back rest rod306. The right frame rotating element302is disposed at the right handrail supporting rod403. The right handrail fixing element402is disposed at the vicinity of the other end of the right handrail rod401. The right handrail supporting rod403has one end movably coupled to the right handrail fixing element402. The right supporting rod sliding element404is coupled to the other end of the right handrail supporting rod403. The right supporting rod sliding element404is movably fitted to the right front leg rod308.

The front supporting mechanism50is disposed between the left lateral folding mechanism10and the right lateral folding mechanism30. The front supporting mechanism50comprises a first front supporting rod501and a second front supporting rod502. The first front supporting rod501and the second front supporting rod502cross each other so as to be movably coupled together. The first front supporting rod501has one end movably coupled to the left frame rotating element102. The first front supporting rod501has the other end movably coupled to the right front leg terminal309. The second front supporting rod502has one end movably coupled to the right frame rotating element302. The second front supporting rod502has the other end movably coupled to the left front leg terminal109.

The rear supporting mechanism60is disposed between the left lateral folding mechanism10and the right lateral folding mechanism30. The rear supporting mechanism60comprises a first rear supporting rod601and a second rear supporting rod602. The first rear supporting rod601and the second rear supporting rod602cross each other so as to be movably coupled together. The first rear supporting rod601has one end movably coupled to the left back rest rod sliding element107. The first rear supporting rod601has the other end movably coupled to the right rear leg terminal311. The second rear supporting rod602has one end movably coupled to the right back rest rod sliding element307. The second rear supporting rod602has the other end movably coupled to the left rear leg terminal111.

The load-bearing structure70is disposed at the left lateral folding mechanism10and the right lateral folding mechanism30. The load-bearing structure70is made of a soft material, such as fabric or plastic.

Referring toFIG. 2throughFIG. 4, to fold the folding chair, a user grips one end of the left back rest rod106(or the right back rest rod306) and one end of the left frame rod101(or the right frame rod301) simultaneously and then moves the left frame rod101toward the left back rest rod106such that the left frame rod101moves away from the left frame rotating element102and rotates about the left front leg rod108. Furthermore, the left frame rotating element102drives the left handrail supporting rod203upward while the first front supporting rod501moves above the right front leg terminal309and toward the right lateral folding mechanism30. Furthermore, the left rear leg sliding element103slides downward along the left rear leg rod104such that the left rear leg rod104moves above the left rear leg fixing element105and toward the right lateral folding mechanism30. Furthermore, the left back rest rod106moves toward the right lateral folding mechanism30such that the left back rest rod sliding element107slides upward along the left back rest rod106. Owing to the left connecting rod110, the left front leg rod108moves toward the left rear leg rod104such that the first rear supporting rod601moves above the right rear leg terminal311and toward the right lateral folding mechanism30. The supporting rod sliding element204slides upward above the left front leg rod108. Owing to the left handrail supporting rod203and the left handrail fixing element202, the left handrail rod201moves toward the left back rest rod106. While the left lateral folding mechanism10is operating as described above, the right lateral folding mechanism20causes the right frame rod301to move toward the right back rest rod306such that the right frame rod301moves away from the right frame rotating element302and rotates about the right front leg rod308. Furthermore, the right frame rotating element302drives the right handrail supporting rod403upward. While the right handrail supporting rod403is moving upward, the second front supporting rod502moves above the left front leg terminal109and toward the left lateral folding mechanism10. The right rear leg sliding element303slides downward along the right rear leg rod304so as to drive the right rear leg rod304above the right rear leg fixing element305and toward the left lateral folding mechanism10. The right back rest rod306moves toward the left lateral folding mechanism10such that the right back rest rod sliding element307slides upward along the right back rest rod306to not only drive, in conjunction with the right connecting rod310, the right front leg rod308toward the right rear leg rod304but also drive the second rear supporting rod602toward the left lateral folding mechanism10along the left rear leg terminal111and cause the supporting rod sliding element304to slide upward along the right front leg rod308. Owing to the right handrail supporting rod403and the right handrail fixing element402, the right handrail rod401moves toward the right back rest rod306. Therefore, the folding chair can be folded up like an umbrella and thus takes up little space and is portable.

In the course of folding or unfolding the folding chair, the left front leg terminal109, the left rear leg terminal111, the right front leg terminal309and the right rear leg terminal311provide protection to the left front leg rod108, the second front supporting rod502, the left rear leg rod104, the second rear supporting rod602, the right front leg rod308, the first front supporting rod501, the right rear leg rod304and the first rear supporting rod601, respectively, to not only prevent them from coming into direct contact with the ground and thus getting damaged, but also render them resistant to slipping such that the left lateral folding mechanism10and the right lateral folding mechanism30demonstrate high stability and high load-bearing capability.

In an embodiment of the present disclosure, as shown inFIG. 2throughFIG. 4, the left frame rotating element102has a first pivotal connection portion1021and a first straddling portion1022. The first straddling portion1022is disposed on the top surface of the first pivotal connection portion1021. The first front supporting rod501has one end movably coupled to the first pivotal connection portion1021. The left frame rod101is movably coupled to the first straddling portion1022. Therefore, to unfold the folding chair, the user moves the left frame rod101into the first straddling portion1022to fit them together and uses the first pivotal connection portion1021of the left frame rotating element102to drive the movement of the first front supporting rod501, so as to not only allow the left frame rotating element102to easily drive the first front supporting rod501to move, but also enable the left frame rod101and the first front supporting rod501to demonstrate high stability and high load-bearing capability after the folding chair has been unfolded.

In an embodiment of the present disclosure, as shown inFIG. 2throughFIG. 4, the left rear leg sliding element103has a first fitting portion1031and a second pivotal connection portion1032. The second pivotal connection portion1032is disposed at one end of the first fitting portion1031. The left rear leg rod104is movably, penetratingly disposed at the first fitting portion1031. The left frame rod101has the other end movably coupled to the second pivotal connection portion1032. Therefore, regardless of whether the folding chair is folded or unfolded, the first fitting portion1031of the left rear leg sliding element103slides downward or upward along the left rear leg rod104. Owing to the second pivotal connection portion1032, the left frame rod101can be moved away from or moved to the first straddling portion1022. Therefore, not only can the left rear leg sliding element103be moved smoothly, but the left frame rod101also demonstrates high stability and high load-bearing capability after the folding chair has been unfolded.

In an embodiment of the present disclosure, as shown inFIG. 2throughFIG. 4, the left rear leg fixing element105has a second securing portion1051and a third pivotal connection portion1052. The second securing portion1051is disposed at one end of the third pivotal connection portion1052. The second securing portion1051is coupled to the vicinity of one end of the left back rest rod106. The left rear leg rod104has one end movably coupled to the third pivotal connection portion1052. Therefore, regardless of whether the folding chair is folded or unfolded, owing to the third pivotal connection portion1052, the left rear leg rod104moves toward the right lateral folding mechanism30or moves away from the right lateral folding mechanism30. Owing to the second securing portion1051and the left back rest rod106, not only can the left rear leg rod104move smoothly, but the left rear leg rod104and the left back rest rod106also demonstrate high stability and high load-bearing capability after the folding chair has been unfolded.

In an embodiment of the present disclosure, as shown inFIG. 2throughFIG. 4, the left back rest rod sliding element107has a second fitting portion1071, a fourth pivotal connection portion1072and a fifth pivotal connection portion1073. The fourth pivotal connection portion1072is disposed at one end of the second fitting portion1071. The fifth pivotal connection portion1073is disposed on one side of the second fitting portion1071. The left back rest rod106is movably, penetratingly disposed at the second fitting portion1071. The left front leg rod108has one end movably coupled to the fourth pivotal connection portion1072. The first rear supporting rod601has one end movably coupled to the fifth pivotal connection portion1073. Therefore, regardless of whether the folding chair is folded or unfolded, the second fitting portion1071of the left back rest rod sliding element107slides downward or upward along the left back rest rod106to not only allow the left front leg rod108to move toward the left rear leg rod104or move away from the left rear leg rod104because of the fourth pivotal connection portion1072and the fifth pivotal connection portion1073, but also allow the first rear supporting rod601to move toward the right lateral folding mechanism30or move away from the right lateral folding mechanism30. Therefore, not only does the left back rest rod sliding element107move smoothly, but the left back rest rod106, the left front leg rod108and the first rear supporting rod601also demonstrate high stability and high load-bearing capability after the folding chair has been unfolded.

In an embodiment of the present disclosure, as shown inFIG. 2throughFIG. 4, the right frame rotating element302has a sixth pivotal connection portion3021and a second straddling portion3022. The second straddling portion3022is disposed on the top surface of the sixth pivotal connection portion3021. The second front supporting rod502has one end movably coupled to the sixth pivotal connection portion3021. The right frame rod301is movably coupled to the second straddling portion3022. Therefore, to unfold the folding chair, the user moves the right frame rod301into the second straddling portion3022to fit them together and uses the sixth pivotal connection portion3021of the right frame rotating element302to drive the movement of the second front supporting rod502, so as to not only allow the right frame rotating element302to easily drive the second front supporting rod502to move, but also enable the right frame rod301and the second front supporting rod502to demonstrate high stability and high load-bearing capability after the folding chair has been unfolded.

In an embodiment of the present disclosure, as shown inFIG. 2throughFIG. 4, the right rear leg sliding element303has a third fitting portion3031and a seventh pivotal connection portion3032. The seventh pivotal connection portion3032is disposed at one end of the third fitting portion3031. The right rear leg rod304is movably, penetratingly disposed at the third fitting portion3031. The right frame rod301has the other end movably coupled to the seventh pivotal connection portion3032. Therefore, regardless of whether the folding chair is folded or unfolded, the third fitting portion3031of the right rear leg sliding element303slides downward or upward along the right rear leg rod304, whereas owing to the seventh pivotal connection portion3032, the right frame rod301moves away from or moves to the second straddling portion3022. Therefore, not only does the right rear leg sliding element103move smoothly, but the right frame rod301also demonstrates high stability and high load-bearing capability after the folding chair has been unfolded.

In an embodiment of the present disclosure, as shown inFIG. 2throughFIG. 4, the right rear leg fixing element305has a fourth securing portion3051and an eighth pivotal connection portion3052. The fourth securing portion3051is disposed at one end of the eighth pivotal connection portion3052. The fourth securing portion3051is coupled to the vicinity of one end of the right back rest rod306. The right rear leg rod304has one end movably coupled to the eighth pivotal connection portion3052. Therefore, regardless of whether the folding chair is folded or unfolded, owing to the eighth pivotal connection portion3052, the right rear leg rod304moves toward the left lateral folding mechanism10or moves away from the left lateral folding mechanism10. In addition, owing to the fourth securing portion3051and the right back rest rod306, not only does the right rear leg rod304move smoothly, but the right rear leg rod304and the right back rest rod306also demonstrate high stability and high load-bearing capability after the folding chair has been unfolded.

In an embodiment of the present disclosure, as shown inFIG. 2throughFIG. 4, the right back rest rod sliding element307has a fourth fitting portion3071, a ninth pivotal connection portion3072and a tenth pivotal connection portion3073. The ninth pivotal connection portion3072is disposed at one end of the fourth fitting portion3071. The tenth pivotal connection portion3073is disposed on one side of the fourth fitting portion3071. The right back rest rod306is movably, penetratingly disposed at the fourth fitting portion3071. The right front leg rod308has one end movably coupled to the ninth pivotal connection portion3072. The second rear supporting rod602has one end movably coupled to the tenth pivotal connection portion3073. Therefore, regardless of whether the folding chair is folded or unfolded, the fourth fitting portion3071of the right back rest rod sliding element307slides downward or upward along the right back rest rod306. Hence, owing to the ninth pivotal connection portion3072and the tenth pivotal connection portion3073, the right front leg rod308moves toward the right rear leg rod304or moves away from the right rear leg rod304; meanwhile, the second rear supporting rod602moves toward the left lateral folding mechanism10or moves away from the left lateral folding mechanism10. Therefore, not only does the right back rest rod sliding element307move smoothly, but the right back rest rod306, the right front leg rod308and the second rear supporting rod602also demonstrate high stability and high load-bearing capability after the folding chair has been unfolded.

In an embodiment of the present disclosure, as shown inFIG. 1, the load-bearing structure70comprises a sitting portion701and a back rest portion702. The sitting portion701is disposed at the left frame rod101and the right frame rod301. The back rest portion702is disposed at the left back rest rod106and the right back rest rod206. The back rest portion702is connected to the sitting portion701. Therefore, the sitter can sit at the sitting portion701and has his/her back pressed against the back rest portion702, thereby enhancing user experience.

The present disclosure is disclosed above by preferred embodiments. However, persons skilled in the art should understand that the preferred embodiments are illustrative of the present disclosure only, but shall not be interpreted as restrictive of the scope of the present disclosure. Hence, all equivalent modifications and replacements made to the aforesaid embodiments shall fall within the scope of the present disclosure. Accordingly, the legal protection for the present disclosure shall be defined by the appended claims.