TW201515605A - Foldable chair - Google Patents

Abstract

A foldable chair includes a supporting unit, a collapsible unit and a chair surface unit. The supporting unit includes an installation rod. The collapsible unit includes a positioning seat sleeved on the installation rod, an upper sliding seat, a foldable rod pivotally connected to the positioning seat, and a linkage rod pivotally connected to the foldable rod and the upper sliding seat. The chair surface unit includes a main chair surface, two side chair surfaces and two tracks. Each track has an expanding terminal and a folding terminal. The collapsible unit and the chair surface unit can be changed, relative to the supporting unit, between an expanding position and a folding position. At the expanding position, the linkage rod and the foldable rod are respectively distant from the installation rod and are intersected with each other to form an angle, and the top of the foldable rod is located at the expanding terminal of the track. At the folding position, the foldable rod and the linkage rod are drawn to each other for being close to the installation rod, and the top of the foldable rod is located at the folding terminal.

Description

Folding chair

The invention relates to a chair, in particular to an installation A folding chair on the rod.

Most of the movable folding chairs installed on the poles are mostly used. For crutches or multi-purpose umbrellas, for additional use, the purpose is to allow the user to rest and rest along the way depending on the physical condition during walking. Therefore, such folding chairs must take into account the rapid folding and folding Easy to carry features.

For example, US2,380,437 and US3,999,565 and other patent cases The exposed folding chair has a support rod and a set of a tripod and a seat respectively which can be folded together with the support rod. However, the folding design is in the folded state, the tripod and the The structure of the seat is exposed, and a plurality of slits are formed due to the rod-shaped folding structure, which is not only visually unattractive, but also easy to pinch the finger due to inattention during use, and has doubts about poor safety of use. .

For example, the folding chair disclosed in TW102112330, although It is enough to overcome the lack of the above patents, but the manufacturing cost is increased due to the complicated structure of the folding unit, and the rods of the folding unit are more pivoted to each other, and also fall. Low structural strength.

Therefore, the object of the present invention is to provide a reduction in The structurally stable folding chair.

Therefore, the folding chair of the present invention comprises a supporting unit and a folding a unit, and a seat unit, the support unit includes a mounting rod, the folding unit includes a positioning seat disposed on the mounting rod, and an upper sliding seat sleeved on the mounting rod and located above the positioning seat a folding rod connected to the positioning seat at the bottom end, and an opposite end connected to the connecting rod of the folding rod and the upper sliding seat respectively, the seat unit includes a main seat surface, two and the main a side seat surface pivotally connected to the seat surface, and two rails located at the bottom of the side seat surfaces, the main chair mask having an inner end portion pivotally connected to the upper sliding seat and an outer end portion opposite to the inner end portion And a side edge portion between the inner end portion and the outer end portion, wherein one side edge of each of the side chair surfaces is pivotally connected to the side edge portions, and the rails are used for The top end of the folding lever is slidably disposed, the rail has an unfolding end adjacent to the outer end portion away from the main seat surface, and a folding end adjacent to the inner end portion and adjacent to the main seat surface, wherein The folding unit and the seat unit can be changed between a deployed position and a folded position relative to the supporting unit, where When the position is open, the main seat surface and the side seat surfaces are located at an angle of intersection with the mounting rod, the upper sliding seat is adjacent to the positioning seat, the positioning seat is fixed to the mounting rod, and the folding rods are The top end is located at the unfolding end of the rails, and the top end of the folding lever and the outer end of the main seat are away from the mounting rod. In the folded position, the seat unit is U-shaped and covered by the folding Unit, the upper sliding seat is away from the positioning seat, the folding levers, The linkage rods are gathered close to each other to the mounting rod, and the top ends of the folding rods are located at the folding end points of the rails, and are adjacent to the mounting rods with the outer end portions of the main seat surfaces.

The folding chair of the present invention, wherein the supporting unit further comprises An upper limit member fixed to the mounting rod, and a lower limit member fixed to the mounting rod. In the deployed position, the upper sliding seat abuts against the upper positioning member and does not move down, the positioning The seat is placed against the lower positioning member and is not moved downward.

The folding chair of the present invention, wherein the folding unit further comprises A pulling elastic member connected between the mounting rod and the positioning seat is provided, and the pulling elastic member provides an elastic force for bringing the positioning seat downward to the lower limit member.

The folding chair of the present invention, wherein the folding unit further comprises a sliding elastic member connected between the mounting rod and the upper sliding seat, the sliding elastic member providing an elastic force for moving the upper sliding seat toward the positioning seat, the sliding elastic member providing the upper sliding seat to approach downward The elastic force of the upper limit member.

The folding chair of the present invention, wherein the supporting unit further comprises a tripod that can be folded, in the deployed position, the tripod can support the mounting rod such that the mounting rod is obliquely standing on the ground, and the seating plane intersects the mounting rod at an acute angle, in the folded position, The tripod is housed in the seat unit adjacent to the mounting rod.

The folding chair of the present invention, wherein the support unit The mounting rod is erected to the ground, and the positioning seat is fixed to the mounting rod, and in the deployed position, the seating plane intersects the mounting rod at a right angle.

The folding chair of the present invention, wherein the support unit The mounting bar has a plurality of grooves arranged in parallel at an outer peripheral surface.

The folding chair of the present invention, wherein the folding unit further comprises Two sets of pivoting seats respectively disposed at the top ends of the folding levers.

The folding chair of the present invention, wherein the pivoting seat components The upper pivot seat is slidably disposed on the rail, and a lower pivot seat pivotally connected to the upper pivot seat. The upper pivotal seat and the rail are connected to each other by two opposite ends. The hinged members of the font are pivotally connected to each other.

The folding chair of the present invention, wherein the seat unit has In the rounded design, the main seat surface further includes two arc surfaces disposed adjacent to the side edge portions, the side chair surfaces respectively including arcuate surfaces disposed adjacent to the side edge portions.

The folding chair of the present invention, wherein the folding unit further comprises a connecting spring connected between the positioning seat and the upper sliding seat, the supporting unit further comprising an upper stopping member corresponding to the positioning seat and disposed on the mounting rod, from the deployed position When the folding position is reached, the upper sliding seat is pulled upward and the positioning seat is pulled upward by the folding unit and the seat unit. When the positioning seat has been pulled up to the position of the upper stopping member, the positioning is performed. The seat is blocked by the upper stop member, the folding unit and the seat unit are close to the mounting rod, and the upper sliding seat is positioned at a latch, so that the folding chair reaches the folding position, When the folding position is to the unfolding position, the fixing between the upper sliding seat and the latch is released, and the upper sliding seat is pulled downward to the positioning seat by the elastic restoring force of the connecting spring, so that the folding unit and the folding unit The seat unit is unfolded, and the folding unit, the seat unit, the positioning seat, and the upper sliding seat are pulled down to the upper limit member and the lower limit member.

The effect of the invention is that the structure of the rod of the folding unit is simple Single, only the folding levers and the linkage rods can reach the seat unit The efficiency of the folding, so the manufacturing cost is reduced, and the folding bars are integrally formed rather than multi-stage pivoting, which can increase the structural strength.

1‧‧‧Support unit

11‧‧‧Installation rod

111‧‧‧ Groove

112‧‧‧Handles

12‧‧ ‧ tripod

121‧‧‧Upper foot

122‧‧‧ Lower leg

123‧‧‧Action rod

13‧‧‧ upper limit

14‧‧‧lower limit

15‧‧‧Upper stop

2‧‧‧Collection unit

21‧‧‧ Positioning Block

211‧‧‧ positioning slot

22‧‧‧Upper slide

221‧‧ ‧ Kadong

222‧‧‧ button

23‧‧‧ folding bar

24‧‧‧ linkage rod

25‧‧‧ pivoting block

251‧‧‧Upper hub

252‧‧‧ lower pivot socket

253‧‧‧ pivotal parts

26‧‧‧ Pulling elastic parts

27‧‧‧Sliding elastic parts

28‧‧‧Carmen

280‧‧‧Flexible components

29‧‧‧Connected spring

3‧‧‧Seat unit

31‧‧‧ main chair

311‧‧‧Inside

312‧‧‧Outer end

313‧‧‧ Side edge

314‧‧‧ curved surface

32‧‧‧ side seat

321‧‧‧ curved surface

33‧‧‧ Track

331‧‧‧Expanding the endpoint

332‧‧‧ folding endpoint

E‧‧‧ ride plane

The other features and advantages of the present invention will be apparent from the following description of the preferred embodiments of the present invention. FIG. 1 is a perspective view of a first preferred embodiment of the preferred embodiment of the folding chair of the present invention; Figure 2 is a perspective view of a folded-out preferred embodiment of the preferred embodiment; Figure 3 is a perspective view of a portion of the preferred embodiment of the preferred embodiment, omitting one side of the chair and an upper leg and a lower foot; 4 is a schematic view of a folding of a partial part of the preferred embodiment; FIG. 5 is a bottom plan view of a seat unit of the preferred embodiment; and FIG. 6 is a side of a seating plane expressing the preferred embodiment. FIG. 7 is a schematic middle view of the chair unit of the preferred embodiment of FIG. 6; FIG. 8 is a front view of a folding unit and the seat unit of the preferred embodiment; 9 is a perspective view of a positioning base of the preferred embodiment; FIG. 10 is a schematic cross-sectional view of a pivoting seat set of the preferred embodiment; and FIG. 11 is a pivotal arm of the pivoting seat set of the preferred embodiment. A bottom view of the seat; Figure 12 is an illustration of the preferred embodiment a card hole and a cassette; and Figure 13 is a schematic view showing the middle of the first preferred embodiment of the preferred embodiment of the folding chair of the present invention.

Referring to FIG. 1 and FIG. 2, a first preferred embodiment of the folding chair of the present invention is applied to a portable cane chair, and comprises a supporting unit 1, a folding unit 2, and a main seat surface 31 and The seat unit 3 pivotally connected to the side seat surface 32 of the main seat surface 31.

The support unit 1 includes a mounting rod 11, a tripod 12 that can be folded, an upper limit member 13 fixed to the mounting rod 11, and a lower limit member 14 fixed to the mounting rod 11.

The mounting rod 11 has a plurality of grooves 111 arranged in parallel on the outer peripheral surface, and a handle 112 at the top end. The groove 111 can increase the structural strength of the mounting rod 11 and provide the folding unit 2 The track is actuated to increase the stability of the overall operation.

The tripod 12 has two upper legs 121 pivotally connected to the folding unit 2, two lower legs 122 pivotally connected to the upper legs 121, and two ends respectively pivotally connected to the upper legs 121 and The actuating lever 123 of the folding unit 2.

The folding unit 2 includes a positioning seat 21 disposed on the mounting rod 11 , an upper sliding seat 22 that is sleeved on the mounting rod 11 and located above the positioning seat 21 , and two bottom ends pivotally connected to the positioning seat The folding lever 23 of the 22 and the opposite ends of the folding lever 23 are respectively pivotally connected to the connecting rod 24 of the folding lever 23 and the upper sliding seat 22, and the pivoting seat set 25 respectively disposed at the top end of the folding lever 23. a pulling elastic member 26 connected between the mounting rod 11 and the positioning seat 21, and a sliding elastic member 27 connected between the mounting rod 11 and the upper sliding seat 22, And a cassette 28 disposed on the mounting rod 11.

The relationship between the folding unit 2 and the stand 12 is: the positioning seat 21 is pivotally connected to the top end of the upper leg 121; the upper sliding seat 22 is pivotally connected to the top end of the actuating rod 123.

The linkage rods 24 are pivotally connected to the positions of the folding rods 23 In the middle and biased toward the positioning seat 21, the length of the linkage rods 24 is smaller than the length of the folding rods 23, which facilitates the movement of the folding rods 23 relative to the seat unit 3.

The pulling elastic member 26 is received in one of the grooves 111, and For the elastic force of the positioning seat 21 to be close to the lower limit member 14, with reference to FIG. 9, the positioning seat 21 has a lower positioning groove 211 corresponding to the lower limit member 14. The sliding elastic member 27 is received in one of the grooves 111 and provides an elastic force for moving the upper sliding seat 22 toward the positioning seat 21. In the first preferred embodiment, the sliding elastic member 27 provides The upper slide 22 approaches downwardly to the elastic force of the upper limit member 13.

In the embodiment, the pulling elastic member 26 and the sliding elasticity The members 27 are respectively tension springs. Further, the mounting rod 11 has four grooves 111, and the tension elastic members 26 and the sliding elastic members 27 can also be designed in one to four numbers.

The seat unit 3 includes the main seat surface 31 and is pivotally connected to the main chair The side chair 32 of the face 31 has an inner end portion 311 pivotally connected to the upper slide 22, an outer end portion 312 opposite to the inner end portion 311, and two are located therein. A side edge portion 313 is disposed between the end portion 311 and the outer end portion 312 and oppositely disposed.

One side edge of the side chair 32 is pivotally connected to the side edges 313, and the bottom surfaces of the side chairs 32 are connected to the pivot sockets 25.

The seat unit 3 further includes two bottoms of the side chairs 32 The rails 33 are arranged for the pivoting seat set 25 at the top end of the folding levers 23 to be slidably disposed. Referring to FIG. 8, FIG. 10 and FIG. 11, the pivoting socket groups 25 respectively have one. The upper pivot seat 251 pivotally disposed on the rail 33 and a lower pivot seat 252 pivotally connected to the upper pivot seat 251. The upper pivot seat 251 and the rail 33 are separated by two The pivoting members 253, which are inverted to each other in an H-shape, are connected to each other to achieve pivotal connection with each other.

Referring to Figure 8, it is further illustrated that the seat surface of the present invention The unit 3 has a rounded design, and the main seat surface 31 further includes two curved surfaces 314 disposed adjacent to the side edge portions 313, and the side side surfaces 32 respectively include curved surfaces disposed adjacent to the side edge portions 313. By this design, the seat unit 3 can be prevented from being caught in the user's underwear in the deployed position.

The folding levers 23 are pivotally connected to the lower pivoting seats 252, respectively. The rail 33 has an unfolded end point 331 adjacent to the outer end portion 312 and away from the side edge portion 313 of the main seat surface 31, and a fold adjacent to the inner end portion 311 and adjacent to the side edge portion 313 of the main seat surface 31. The end points 332, it is worth mentioning that the rails 33 between the unfolding end points 331 and the folding end points 332 are in the shape of a straight line, and the shapes of the rails 33 can also be designed as curved or other shapes as needed. .

Referring to FIG. 1, FIG. 2, FIG. 3 and FIG. 4, the folding unit 2 and The seat unit 3 is convertible relative to the support unit 1 between a deployed position and a folded position.

Referring to Figures 1, 5 and 6, in the deployed position, the foot The upper and lower legs 121 and 122 of the frame 12 are respectively away from the mounting rod 11 so that the frame 12 can support the mounting rod 11 such that the mounting rod 11 is inclined to the ground.

The upper slide 22 is oriented toward the positioning by the sliding elastic member 27 The seat 21 is approaching the upper limit member 13, and the positioning seat 21 is approached by the tensioning elastic member 26 and positioned on the lower limit member 14, and when the upper slider 22 continues to approach the positioning seat At 21 o'clock, the upper sliding seat 22 is moved down to the upper limit position member 13. The connecting rods 24 and the folding rods 23 are respectively away from the mounting rod 11 and intersect at an angle, and the folding levers 23 support the chair. The side chairs 32 of the face unit 3, and the top ends of the folding bars 23 are located at the unfolding end points 331 of the rails 33, and the top ends of the folding bars 23 are away from the outer end portion 312 of the main seat surface 31. Mounting rod 11.

At this time, the main seat surface 31 is co-located with the side chairs 32 A seating plane E (shown in FIG. 6) that intersects the mounting rod 11 at an angle. In the present embodiment, since the mounting rod 11 is inclined to the ground, the seating plane intersects the mounting rod 11 at an acute angle.

Referring to Figure 3, Figure 4 and Figure 7, it is intended to change from the deployed position. When changing to the folding position, it is only necessary to apply upward to the upper sliding seat 22 such that the upper sliding seat 22 slides along the mounting rod 11 in a direction away from the positioning seat 21, when the upper sliding seat 22 The sliding seat 21 is temporarily held downwardly against the lower limit member 14 by the pulling elastic member 26, so that the upper sliding seat 22 can drive the tripod pivotally connected to the positioning seat 21. 12, and driving the folding unit 2 and the seat unit 3 to start folding.

It is worth noting that in Figure 3 and Figure 4, in order to be clear The internal structure is omitted, and one of the side seat surfaces 32 and the corresponding upper leg 121, lower leg 122 and the like are omitted.

The actuating levers 123 of the tripod 12 are pivotally connected to the upper sliding seat 22, therefore, when the upper sliding seat 22 slides upward, the upper sliding rods 121 are rotated upwards and gradually approach the mounting rod 11, so that the lower sliding rods 122 can gradually face the upper side due to gravity. The foot rod 121 pivots close to the mounting rod 11, and the lower foot rod 122 is surely brought closer to the mounting rod 11 by externally applying force. The upper foot rod 121 is a U-shaped rod. When the position is folded, the lower legs 122 are respectively received in the upper legs 121.

Referring to FIG. 3 and FIG. 5, the process of folding the folding unit 2 The upper sliding portion 22 is pushed up, and since the inner end portion 311 of the main seat surface 31 is pivotally connected to the upper sliding seat 22, the inner end portion 311 of the main seat surface 31 also moves upward with the upper sliding seat 22 Moving, the main seat surface 31 will gradually turn closer to the mounting rod 11 with the inner end portion 311 pivoting downward.

In addition, the upper sliding seat 22 can be driven by the linkage rods 24 The folding levers 23 are pivoted upward with the positioning seat 21 as a pivot point, and the rails 33 of the bottom surfaces of the side chairs 32 are connected to the folding levers 23, and the linkage levers 24 are pivotally connected thereto. The position of the folding lever 23 is close to the middle and is biased toward the positioning seat 21, and the length of the linking rods 24 is smaller than the length of the folding rods 23, which facilitates the movement of the folding rods 23 relative to the seat unit 3. When the folding lever 23 is rotated upward, the top ends of the folding levers 23 will be slid by the unfolding end points 331 of the rails 33 toward the folding end point 332, whereby the side seat surfaces 32 will rotate downwards gradually. Close to the mounting rod 11 and facing the main seat The 31 direction is close together, and finally the main seat surface 31 and the side seat surfaces 32 are U-shaped to cover the folding unit 2 and the stand 12.

Referring to Figures 2, 4 and 7, when the stand 12, the receipt The unit 2 and the seat unit 3 gradually close the mounting rod 11 until the seat unit 3 is U-shaped and covers the folding unit 2 and the stand 12 such that the folding unit 2 and the stand 12 Separately stored in the seat unit 3, at this time, the stand 12, the folding unit 2 and the seat unit 3 are changed to the folding position, and the main seat surface 31 and the side chairs 32 are substantially The upper slides 22 are respectively parallel to the positioning rods 21, and the upper sliding blocks 22 are away from the positioning bases 21, and the folding rods 23 and the connecting rods 24 are close to each other and close to the mounting rod 11, and the tripod 12 is on the upper side. The foot rod 121 is adjacent to the mounting rod 11, and the top end of the folding rods 23 is located at the folding end point 332 of the rails 33, and is adjacent to the mounting rod 11 with the outer end portion 312 of the main seat surface 31.

Referring to FIG. 12, it is further explained that waiting for the foot The frame 12, the folding unit 2 and the seat unit 3 are moved closer to the mounting rod 11, and then the upper sliding seat 22 is moved up to the handle 112. At this time, a card hole 221 of the upper sliding seat 22 is The latches 28 are fixed to each other for fixing the upper slider 22, and the tripod 12, the folding unit 2 and the seat unit 3 are held in the folding position, and when the fixing is to be released, The cassette 28 is pressed against the card hole 221 by a button 222. In the first preferred embodiment, the cassette 28 is kept constantly convex by an elastic member 280.

Referring to FIG. 2, the tripod 12 is at the folding position. The folding unit 2 and the seat unit 3 are close to the handle 112, so that the first The center of gravity of the preferred embodiment is high, so that when the user uses the first preferred embodiment as a crutch, the user can swing more labor-savingly.

Referring to Figure 13, a second preferred embodiment of the folding chair of the present invention is The first preferred embodiment is substantially the same, except that the folding unit 2 of the second preferred embodiment further includes a connecting spring 29 connected between the positioning seat 21 and the upper sliding seat 22, the support The unit 1 further includes an upper stop 15 corresponding to the positioning seat 21 at the folding position and disposed on the mounting rod 11, the second preferred embodiment pulling the positioning position from the deployed position to the folding position The upper slide 22 is upwardly pulled up by the folding unit 2 and the seat unit 3, and the action manner is substantially the same as that of the first preferred embodiment. When the positioning seat 21 has been pulled up to the upper block In the position of the stopper 15, the positioning seat 21 is blocked by the upper stopper 15, the folding unit 2 and the seat unit 3 are close to the mounting rod 11, and the upper sliding seat 22 is positioned at The cassette 28 (Fig. 12) causes the folding chair to reach the folding position.

Release the upper slide from the folding position to the deployed position Fixing between the latching portion 22 and the latching portion 28, the upper slider 22 is pulled downward toward the positioning seat 21 by the elastic restoring force of the connecting spring 29, and the folding unit 2 and the seat unit 3 are deployed. After the folding unit 2 and the seat unit 3 are deployed, the folding unit 2, the seat unit 3, the positioning seat 21, and the upper sliding seat 22 are pulled down to the upper limit position 13 and the lower limit position. Item 14.

It should be noted that the connecting spring 29 may be an elastic rope element or a spiral element made of a rigid material.

Through the above composition, the functions and advantages of the folding chair of the present invention can be summarized as follows:

1. The tripod 12, the folding unit 2 and the seat unit 3 can be changed between the deployed position and the folding position with respect to the mounting rod 11, and the user only needs to move the upper sliding seat 22 by one hand. The folding unit is oriented toward the folding position, and the seat unit 3 is automatically pulled into a U shape and covers the stand 12 and the folding unit 2, thereby having the advantages of increased aesthetics and convenient operation.

Secondly, the tripod 12 and the folding unit 2 can be respectively accommodated in the seat unit 3, and the gap between the legs 12 and the folding unit 2 can be effectively blocked to avoid inadvertent use. The accident caused by a user's pinch injury also has the effect of improving the safety of use.

3. The structure of the rod of the folding unit 2 is simple, and only the folding rods 23 and the linkage rods 24 can achieve the effect of folding the seat unit 3, so the manufacturing cost is reduced, and the collection is reduced. The folding bar 23 is integrally formed instead of a multi-segment pivoting, which increases structural strength.

It is to be noted that the support unit 1 may not be provided with the stand 12 , and only the mounting rod 11 needs to be erected on the ground, and the limiting member 12 is fixed to the mounting rod 11 . In this application, the seating plane will intersect the mounting rod 11 at right angles in the deployed position, and the present invention can be applied to mobile spaces such as buses, MRT, steamboats, yachts, etc. through such changes. Or it can be used as an expansion seat for indoor spaces such as stations, department stores, and bar chairs.

However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent change of the patent application scope and the patent specification content of the present invention is Modifications are still within the scope of the invention.

1‧‧‧Support unit

11‧‧‧Installation rod

111‧‧‧ Groove

12‧‧ ‧ tripod

121‧‧‧Upper foot

122‧‧‧ Lower leg

123‧‧‧Action rod

13‧‧‧ upper limit

14‧‧‧lower limit

2‧‧‧Collection unit

21‧‧‧ Positioning Block

22‧‧‧Upper slide

221‧‧‧Kakong

23‧‧‧ folding bar

24‧‧‧ linkage rod

25‧‧‧ pivoting block

26‧‧‧ Pulling elastic parts

27‧‧‧Sliding elastic parts

28‧‧‧Carmen

3‧‧‧Seat unit

31‧‧‧ main chair

311‧‧‧Inside

312‧‧‧Outer end

313‧‧‧ Side edge

32‧‧‧ side seat

33‧‧‧ Track

331‧‧‧Expanding the endpoint

332‧‧‧ folding endpoint

Claims (11)

A folding chair comprises: a supporting unit comprising a mounting rod; a folding unit comprising a positioning seat disposed on the mounting rod, a sliding sleeve disposed on the mounting rod and located above the positioning seat a folding lever connected to the positioning seat and a connecting rod connected to the connecting rod of the folding lever and the upper sliding seat respectively; and a seat unit including a main seat surface and two a side seat surface pivotally connected to the main seat surface, and two tracks located at the bottom of the side seat surface, the main seat cover having an inner end portion pivotally connected to the upper sliding seat and a opposite end portion The outer end portion and the second side edge portion between the inner end portion and the outer end portion are opposite to each other, and one side edge of the side seat surfaces is pivotally connected to the side edge portions, and the rails are used for the rails Provided to be slidably disposed at a top end of the folding lever, the rail having an unfolded end adjacent to the outer end and away from the main seat surface, and a folding end adjacent to the inner end and adjacent to the main seat surface Wherein the folding unit and the seat unit can be changed between a deployed position and a folded position relative to the supporting unit In the unfolded position, the main seat surface and the side seat surfaces are located at an angle of intersection with the mounting rod, the upper sliding seat is adjacent to the positioning seat, and the positioning seat is fixed to the mounting rod, and the receiving seat is fixed The top end of the folding rod is located at the unfolding end of the rails, and the top end of the folding rod and the outer end of the main seat surface are away from the mounting rod. In the folding position, the seat unit is U-shaped and covered a folding unit, the upper sliding seat is away from the a positioning seat, the folding levers, the connecting rods are close to each other, and the top ends of the folding rods are located at the folding end points of the rails, and are adjacent to the outer end of the main seat surface. Rod. The folding chair of claim 1, wherein the supporting unit further comprises an upper limit member fixed to the mounting rod, and a lower limit member fixed to the mounting rod, in the deployed position, the The upper sliding seat is not moved downward by the upper positioning member, and the positioning seat is not moved downwards against the lower positioning member. The folding chair of claim 2, wherein the folding unit further comprises a pulling elastic member connected between the mounting rod and the positioning seat, the pulling elastic member provides the positioning seat to be approached downward The elastic force of the lower limit member. The folding chair of claim 2, wherein the folding unit further comprises a sliding elastic member connected between the mounting rod and the upper sliding seat, the sliding elastic member providing the upper sliding seat toward the positioning seat The moving elastic force, the sliding elastic member provides an elastic force that brings the upper sliding seat downward toward the upper limit member. The folding chair according to claim 1, wherein the supporting unit further comprises a tripod that can be folded, and in the deployed position, the tripod can support the mounting rod such that the mounting pole stands obliquely to the ground. The seating plane intersects the mounting bar at an acute angle. In the folded position, the stand is received in the seating unit adjacent to the mounting bar. The folding chair according to claim 1, wherein the mounting rod of the supporting unit is erected on the ground, and the positioning seat is fixed to the mounting rod. In the deployed position, the seating plane is at a right angle to the mounting bar. The folding chair according to claim 1, wherein the mounting rod of the supporting unit has a plurality of grooves arranged in parallel at an outer peripheral surface. The folding chair according to claim 1, wherein the folding unit further comprises two pivoting seat sets respectively disposed at the top ends of the folding bars. The folding chair according to claim 8, wherein the pivoting seat sets respectively have an upper pivot seat pivotably disposed on the track, and a lower pivot pivotally connected to the upper pivot seat a seat, the upper pivotal seat and the rail are pivotally connected to each other by two pivoting members that are butted in an inverted H-shape. The folding chair according to claim 1, wherein the seat unit has a rounded design, and the main seat further includes two curved surfaces disposed adjacent to the side edges, the side chairs respectively including A curved surface disposed adjacent to the side edges. The folding chair of claim 2, wherein the folding unit further comprises a connecting spring connected between the positioning seat and the upper sliding seat, the supporting unit further comprising a corresponding positioning seat at the folding Positioning the upper stop member on the mounting rod, and pulling the upper sliding seat upward from the unfolding position to the folding position, and pulling the positioning seat upwardly by the folding unit and the seat unit, when When the positioning seat has been pulled up to the position of the upper stopping member, the positioning seat is blocked by the upper stopping member, and the folding unit and the seat unit are close to the mounting rod, and the upper sliding seat Set in a card to make the receipt When the folding chair reaches the folding position, when the folding position reaches the unfolding position, the fixing between the upper sliding seat and the latch is released, and the upper sliding seat is pulled down to the positioning by the elastic restoring force of the connecting spring The folding unit and the seat unit are unfolded, and the folding unit, the seat unit, the positioning seat and the upper sliding seat are pulled down to the upper limit member and the lower limit member.