CN219331130U - Multifunctional chair capable of simply adjusting angle - Google Patents

Abstract

The utility model relates to a multifunctional chair capable of simply adjusting an angle, which comprises a support frame, a cushion fixedly arranged on the top side of the support frame, a backrest rotatably arranged on the rear side of the cushion, and a foot rest seat slidably arranged at the bottom of the cushion, wherein strip gaps are arranged at the bottoms of the left side and the right side of the cushion, the top end of the support frame is arranged in the gaps, and the cushion and the backrest are connected through an angle adjusting device. According to the utility model, the backrest can be rotated by adjusting the long rod handle of the angle adjusting device, and then the leg rest seat is pulled out, so that the lying position can be realized.

Description

Multifunctional chair capable of simply adjusting angle

Technical Field

The utility model belongs to the technical field of angle-adjustable seats, and particularly relates to a multifunctional chair capable of simply adjusting an angle.

Background

The conventional seat is generally adjustable in height, the angle of the backrest is generally not adjustable, the special seat with the adjustable backrest angle is complex in structure and high in price, or the angle can be adjusted only by great effort, and the conventional seat is difficult to be applied in combination with the factors that the budget of a school is generally low, the effort of a pupil is small and the like in the aspect of meeting the requirements of lying rest of a user in noon break for the scenes of schools, particularly middle schools and the like.

And, for the angle regulator in the seat that the back is rotatable, the common angle regulator on the market at present is comparatively thin, and in use, also breaks away from easily, unstable. When the existing angle adjusters are applied to angle adjustment of sofas, tables and the like, quality conditions of multiple functional failures can be generated.

Besides the problem that the existing angle regulator is thinner, the existing angle regulator has only one heavy guarantee, namely the angle regulator only has one rotating connection structure, when the unique rotating connection structure is damaged, the whole angle regulator directly breaks down or cannot be used, and the use risk is increased.

Disclosure of Invention

The utility model provides a multifunctional chair capable of simply adjusting an angle, which has a simple and stable structure, is easy to adjust a backrest, is also provided with a foot rest seat, does not occupy redundant space, and can meet the requirements of a user for resting in a lying posture during noon break.

The technical means adopted by the utility model are as follows:

the utility model provides a but simple and easy angle regulation's multi-functional chair, includes the support frame, fixedly sets up the cushion in the support frame top side and rotates the back that sets up at the cushion rear side to and still including sliding the bracket seat that sets up in the cushion bottom.

Preferably, the bottoms of the left side and the right side of the cushion are provided with strip gaps, and the top ends of the supporting frames are arranged in the gaps.

Preferably, the support frame comprises a bottom frame, wherein the bottom frame comprises an I-shaped base and a first supporting pipe arranged on the base, and a first adjusting hole is formed in the first supporting pipe; the support frame further comprises an upper frame arranged in the first support pipe through a pipe sleeve, the upper frame comprises a second support pipe sleeved in the first support pipe and a transverse pipe arranged at the top end of the second support pipe, the transverse pipe is arranged in the notch, a second adjusting hole corresponding to the first adjusting hole in position is arranged in the second support pipe, and an adjusting nail penetrates through the first adjusting hole and the second adjusting hole.

Preferably, two sliding seats are arranged on the inner sides of the notches on the two sides of the bottom of the seat cushion, two sliding rods are arranged in the sliding seats in a sliding mode, one ends, close to the front side of the seat cushion, of the two sliding rods are connected through a connecting rod, and a foot rest seat is arranged on the connecting rod.

Preferably, the bottom of the cushion is fixedly provided with an angle adjusting device, the angle adjusting device comprises a chassis fixedly arranged at the bottom of the cushion and a rotating piece rotatably arranged on the chassis, and the rotating piece is connected with the backrest through a connecting pipe.

Preferably, the chassis and the rotating member are connected through a fastener, the fastener is movably connected with the chassis and the rotating member, and a handle capable of poking the fastener is further arranged on the chassis in a rotating manner.

Preferably, the chassis is U-shaped, and first openings are formed in two side edges of the U-shaped chassis, which are close to the rotating piece, and are close to the bottom edge of the U-shaped chassis; and the rotating piece is U-shaped, two side edges of the rotating piece are arranged on the outer sides of the two side edges of the chassis, a second opening is formed in the position corresponding to the first opening, a first connecting nail is arranged on the two side edges of the rotating piece, and the rotating piece penetrates through the first opening and the second opening.

Preferably, a third opening and a fourth opening are respectively arranged on two sides of the U-shaped groove-shaped chassis, which are close to the rotating piece, and the third opening and the fourth opening are close to the opening of the U-shaped groove-shaped chassis; the third opening and the fourth opening are arranged through two sides of the shaft, the diameter of the shaft is smaller than that of the third opening, and the diameter of the third opening is smaller than that of the fourth opening; the outer side of the third opening is provided with a fixed nut sleeved on the penetrating shaft;

a fifth opening is further formed in the two side edges of one end, far away from the second opening, of the rotating piece, and a second connecting nail is arranged and penetrates through the fifth openings in the two sides;

the fastener is provided with a first perforation at one end close to the penetrating shaft, the first perforation is sleeved on the periphery of the penetrating shaft between two side edges of the chassis, and a second perforation is provided at one end close to the second connecting nail, the second perforation is a long hole, and the second perforation is sleeved on the periphery of the second connecting nail between two side edges of the rotating piece.

Preferably, a U-shaped groove-shaped connecting piece is arranged outside the fourth hole, is perpendicular to the side edge of the chassis and is consistent with the opening direction of the chassis; the handle comprises a rotating shaft arranged in two sides of the connecting piece, a connecting rod connected to the side wall of the rotating shaft far away from the fourth perforation, a handheld part arranged at one end of the connecting rod far away from the rotating shaft, and a wedge part arranged on the side wall of the rotating shaft near the fourth perforation, wherein the wedge part is clamped between the penetrating shaft and the fourth perforation.

Preferably, a connecting ring is further arranged on the inner side of the fourth opening at the side where the connecting piece is arranged in an inward extending mode, the diameter of the connecting ring is the same as that of the fourth opening, and the wedge part is clamped between the penetrating shaft and the fourth opening and/or the connecting ring;

and a connecting plate which is positioned on the same plane with the bottom edge of the chassis is further arranged on the chassis, a first mounting hole is formed in the connecting plate, a screw penetrates through the first mounting hole to be arranged at the bottom of the cushion, a second mounting hole is formed in the rotating piece, and the screw penetrates through the second mounting hole to be arranged on the connecting pipe.

Compared with the prior art, the utility model has the following beneficial technical effects:

1. the operation is lighter, and this scheme only needs the handle of upper and lower regulation seat cushion downside can realize the rotation of back, and the handle is connected by the stock, utilizes lever principle to adjust, and is more laborsaving, also is applicable to the user that strength is less.

2. The angle adjusting device of back and cushion is connected to simple structure and stable, and this angle adjusting device is triangular structure when locking, and locking structure is more stable, uses safelyr.

3. The human engineering is in a lying posture for noon break, the backrest can be adjusted to form a certain obtuse angle with the cushion, the bottom of the cushion is also provided with the hidden foot rest seat, and when in noon break, the leg can be supported and lifted, so that the leg can be effectively supported and relaxed, and the lying posture with a certain angle is inclined, so that the digestion can be promoted under the condition of physical guiding force, and aiming at the actual situation, the sitting posture of the student can be guaranteed on physical health, and the student can be relaxed in a short time to obtain noon break.

Drawings

FIG. 1 is a schematic view of an exploded structure of a multifunctional chair with a simple angle adjustment according to the present utility model.

Fig. 2 is a schematic view of the assembled backrest of fig. 1 in a vertical state.

Fig. 3 is a schematic view of the structure of the back view of fig. 2.

Fig. 4 is a schematic view of the bottom view of fig. 2.

Fig. 5 is a right side view of fig. 1.

Fig. 6 is a schematic view of the backrest of fig. 2 rotated and the footrest developed.

Fig. 7 is a schematic view of the structure of the back view of fig. 6.

Fig. 8 is a schematic view of the bottom view of fig. 6.

Fig. 9 is a right side view of fig. 6.

Fig. 10 is an exploded view of the angle adjusting device.

Fig. 11 is a schematic perspective view of the assembled locking state of fig. 10.

Fig. 12 is a schematic perspective view of another view of fig. 11.

Fig. 13 is a front view of fig. 12.

Fig. 14 is a schematic perspective view of the angle adjusting device in an angle adjustable state after unlocking.

Fig. 15 is a schematic perspective view of another view of fig. 14.

Fig. 16 is a front view of fig. 15.

Fig. 17 is a schematic structural view of the slide bar.

Wherein:

1 an angle adjusting device;

11 chassis, 111 first opening, 112 third opening, 113 fourth opening, 114 connecting ring, 115 connecting plate, 116 first mounting hole, 117 connecting piece;

12 rotating member, 121 second opening, 122 fifth opening, 123 second mounting hole;

13 fasteners, 131 first perforations, 132 second perforations;

14, threading a shaft;

151 first connecting pin, 152 second connecting pin;

16 handles, 161 shaft, 162 links, 163 handholds, 164 wedges;

17 fixing a nut;

18, fixing pins;

2, supporting frames;

21 chassis, 211 base, 212 first adapter tube, 213 first adjustment hole, 214 foot pad;

22 pipe sleeves;

23 upper rack, 231 second adapter tube, 232 second adjusting hole, 233 horizontal tube;

3, a cushion;

31 notches;

41 connecting pipes;

42 a backrest;

51 sliding seat;

52 slide bars, 521 first plugs, 522 second plugs, 523 connecting holes;

53 connecting rods;

54 foot rest and 541 mount bar.

Detailed Description

The utility model relates to a multifunctional chair capable of simply adjusting an angle, which comprises a support frame 2, a seat cushion 3 fixedly arranged on the top side of the support frame 2, a backrest 42 rotatably arranged on the rear side of the seat cushion 3, and a foot rest seat 54 slidably arranged on the bottom of the seat cushion 3, as shown in fig. 1 and 7.

As shown in fig. 1, the bottoms of the left and right sides of the cushion 3 are provided with elongated notches 31, the top ends of the supporting frames 2 are arranged in the notches 31, and the wrapped notches 31 can enable the top of the supporting frame 2 to be good in the supporting column cushion 3, so that the structure is more stable.

Specifically, as shown in fig. 1, the support frame 2 includes a chassis 21, the chassis 21 includes an i-shaped base 211 and a first receiving tube 212 disposed on the base 211, so as to improve stability of the support frame 2, as shown in fig. 1, on one hand, a semi-wrapping foot pad 214 is disposed at four corners of the i-shaped base 211, to increase friction force, and at the same time, to prevent foot from being knocked, and on the other hand, with the first receiving tube 212 as a boundary, a length of a rear side of the base 211 is greater than a length of a front side of the base 211, so as to prevent the seat from being turned backwards when lying down.

The first socket pipe 212 is provided with a first adjustment hole 213; and the support frame 2 further comprises an upper frame 23 arranged in the first joint pipe 212 through a pipe sleeve 22, wherein an opening is arranged on the pipe sleeve 22; the upper frame 23 comprises a second receiving pipe 231 sleeved in the first receiving pipe 212, and a transverse pipe 233 arranged at the top end of the second receiving pipe 231, wherein the transverse pipe 233 is arranged in the notch 31, a second adjusting hole 232 corresponding to the first adjusting hole 213 in position is arranged in the second receiving pipe 231, and an adjusting nail penetrates through the first adjusting hole 213 and the second adjusting hole 232, and the height of the seat is adjusted by adjusting the positions of the adjusting nail in the first adjusting hole 213 and the second adjusting hole 232.

As shown in fig. 1 and fig. 4, two sliding seats 51 are arranged at the inner sides of the notches 31 at the two sides of the bottom of the seat cushion 3, and two sliding rods 52 are arranged in the sliding seats 51 in a sliding manner, preferably, as shown in fig. 17, a first plug 521 and a second plug 522 are respectively arranged at the front end and the rear end of each sliding rod 52, so that the sliding rods 52 can slide in the sliding seats 51 without separating from the sliding seats 51, one ends, close to the front side of the seat cushion 3, of the two sliding rods 52 are connected through a connecting rod 53, and in particular, as shown in fig. 17, the connecting rod 53 is connected to the first plugs 521 at the front ends of the two sliding rods 52; the connecting rod 53 is provided with a leg rest seat 54, specifically, the first plug 521 is further provided with a connecting hole 523, the bottom of the leg rest seat 54 is fixedly provided with a mounting rod 541, and the mounting rod 541 is disposed in the connecting hole 523 so as to fixedly dispose the leg rest seat 54 on the slide rod 52.

And for the height of the foot rest seat 54, it is preferable that when the foot rest seat 54 slides to the bottom of the seat cushion 3, the top of the foot rest seat 54 is slightly lower than the bottom of the seat cushion 3, and the front end of the foot rest seat 54 does not exceed the front end of the seat cushion 3, so that normal use in a sitting posture state of the seat is not affected.

And, the bottom of the cushion 3 is fixedly provided with an angle adjusting device 1, as shown in fig. 10, the angle adjusting device 1 includes a chassis 11 disposed at the bottom of the cushion 3 and a rotating member 12 rotatably disposed on the chassis 11, the rotating member 12 is connected with a backrest 42 through a connecting tube 41, the back side of the backrest 42 is preferably provided with a wrapping type connecting structure, the connecting tube 41 is disposed in the connecting structure to prevent exposure to the outside; and the chassis 11 and the rotating member 12 are connected through a fastening member 13, the fastening member 13 is movably connected with the chassis 11 and the rotating member 12, and a handle 16 capable of stirring the fastening member 13 is further rotatably arranged on the chassis 11 so as to stir the movable position of the fastening member 13 on the chassis 11, and the fastening member 13 is adjusted to be in a fastening locking state or a rotatable state.

As shown in fig. 10 and 11, the chassis 11 has a U-shaped groove shape, and first openings 111 are provided on both side edges of the U-shaped groove-shaped chassis 11 near the rotating member 12, the first openings 111 being provided near the bottom edge of the U-shaped groove-shaped chassis 11; and the rotating member 12 is in a U-shaped groove, two sides of the rotating member 12 are disposed at outer sides of two sides of the chassis 11, and a second opening 121 is disposed at a position corresponding to the first opening 111, and a first connecting pin 151 is disposed through the first opening 111 and the second opening 121, that is, through the first connecting pin 151, the chassis 11 is rotationally connected with the rotating member 12. Of course, the chassis 11 and the rotating member 12 may have other shapes, and the positions of the connecting nails can be provided and the connecting nails can be rotatably connected, so that the U-shaped groove is only one of the preferred embodiments.

As to how to further control the rotation start and stop and the rotation angle between the chassis 11 and the rotating member 12, as shown in fig. 10 and 11, a third opening 112 and a fourth opening 113 are respectively provided on both sides of the U-shaped groove-shaped chassis 11 near the rotating member 12, and the third opening 112 and the fourth opening 113 are provided near the opening of the U-shaped groove-shaped chassis 11; and a shaft 14 passing through the third and fourth openings 112 and 113 on both sides, wherein the diameter of the shaft 14 is smaller than that of the third opening 112, and the diameter of the third opening 112 is smaller than that of the fourth opening 113; and a fixing nut 17 sleeved on the penetrating shaft 14 is arranged outside the third opening 112.

And, there are also fifth openings 122 on both sides of one end of the rotary member 12 far from the second opening 121, and second connecting nails 152, which are disposed through the fifth openings 122 on both sides.

The fastener 13 has a first through hole 131 at one end near the shaft 14, the first through hole 131 is sleeved on the periphery of the shaft 14 between two sides of the chassis 11, and a second through hole 132 at one end near the second connecting pin 152, the second through hole 132 is a long hole, and the second through hole 132 is sleeved on the periphery of the second connecting pin 152 between two sides of the rotating member 12.

The diameter of the through shaft 14 is smaller than that of the third opening 112 and the fourth opening 113, so that the through shaft 14 can move in the third opening 112 and the fourth opening 113 to drive the fastener 13 to move, thereby adjusting the position of the second connecting pin 152 in the long hole of the fastener 13, as shown in fig. 11, the through shaft 14 is fixed between the third opening 112 and the fourth opening 113, and when the second connecting pin 152 abuts against one end of the long hole, the chassis 11 and the rotating member 12 are locked and cannot rotate, as shown in fig. 14, the position of the through shaft 14 between the holes of the third opening 112 and the fourth opening 113 is movable, and when the second connecting pin 152 is in the middle position of the long hole, the chassis 11 and the rotating member 12 are movable, so that the rotating member 12 can rotate to a designated angle, and then the through shaft 14 is fixed to fix the rotating member 12 at the designated angle.

For further convenient adjustment and fixing of the position of the shaft 14, as shown in fig. 10 and 11, a U-shaped groove-shaped connecting piece 117 is provided outside the fourth opening 113, the connecting piece 117 is perpendicular to the side edge of the chassis 11 and is consistent with the opening direction of the chassis 11, the bottom edge of the U-shaped groove of the connecting piece 117 can also have the function of limiting the excessive rotation of the connecting rod 162, and the connecting piece 117 can also have other shapes, which can meet the requirement of rotating the handle 16 thereon; and the handle 16 includes a rotating shaft 161 rotatably disposed in two sides of the connecting member 117, a connecting rod 162 connected to a side wall of the rotating shaft 161 far away from the fourth through hole, a hand-holding portion 163 disposed at one end of the connecting rod 162 far away from the rotating shaft 161, and a wedge portion 164 disposed on a side wall of the rotating shaft 161 near the fourth through hole, wherein the wedge portion 164 is clamped between the through shaft 14 and the fourth through hole 113.

And a connecting ring 114 is further extended inward on the inner side of the fourth hole 113 on the side where the connecting piece 117 is provided, the diameter of the connecting ring 114 is the same as that of the fourth hole 113, and the wedge portion 164 is clamped between the through shaft 14 and the fourth hole 113 and/or the connecting ring 114.

The length of the link 162 is preferably such that the holding portion 163 at one end of the link 162 is just located at the bottom side of the edge of the seat cushion, so that the operation is convenient. And for the wedge portion 164, preferably, in one embodiment, when the handle 16 rotates to the first position, as shown in fig. 11-13, the wedge portion 164 is clamped between the through shaft 14 and the inner side wall of the connecting ring 114 near one side of the long hole, so that the through shaft 14 moves in the direction away from the long hole in the connecting ring 114 and is locked by the wedge portion 164 to be unable to move, thereby driving the fastener 13 to move in the direction away from the second connecting nail 152, so that the second connecting nail 152 is propped against one end of the long hole away from the through shaft 14, and the rotation structure of the whole chassis 11 and the rotation member 12 is locked; when the handle 16 is rotated to the second position, as shown in fig. 14-16, the wedge 164 is separated from the position between the through shaft 14 and the inner wall of the connecting ring 114, the through shaft 14 loses the pushing force provided by the wedge 164 and can freely move in the connecting ring 114, the second connecting nail 152 is not tightly pushed against one end of the long hole, the rotating member 12 can freely rotate around the chassis 11 to realize angle adjustment, and after the angle adjustment is proper, the handle 16 is rotated to the first position as shown in fig. 11 to realize fixation.

In one embodiment as shown in fig. 14, a notch is formed at a position on the side of the rotating member 12 near the opening of the U-shaped groove-shaped connecting member 117, when the rotating member 12 rotates toward the opening direction of the connecting member 117, the notch on the rotating member 12 abuts against the side of the connecting member 117, at this time, a certain included angle is formed between the rotating member 12 and the chassis 11, preferably an obtuse angle, and the wedge 164 abuts against the notch, so that the structure is more stable. In practice, the seat may be provided with a reclined condition.

Preferably, as shown in fig. 10, a connecting plate 115 that is located on the same plane with the bottom edge of the chassis 11 is further disposed on the chassis 11, a first mounting hole 116 is disposed on the connecting plate 115, a screw or a fixing pin is disposed on the bottom of the seat cushion 3 through the first mounting hole 116, and a second mounting hole 123 is disposed on the rotating member 12, and a screw or a fixing pin is disposed on the connecting pipe 41 through the second mounting hole 123. The connection plate 115 is preferably provided in two at front and rear sides as shown in fig. 10, so that stable installation is facilitated. The first mounting hole 116 and the second mounting hole 123 are used for mounting two parts to be rotated, such as a seat cushion and a backrest of a chair, respectively, through the fixing pin 18 and the like, so as to realize the rotation of the backrest.

Fig. 2 to 5 are schematic structural views of the sitting posture and fig. 6 to 9 are schematic structural views of the reclining posture with the footrest 54 and the backrest 42 both unfolded.

Claims (8)

1. The multifunctional chair capable of simply adjusting the angle is characterized by comprising a support frame (2), a seat cushion (3) fixedly arranged on the top side of the support frame (2), a backrest (42) rotatably arranged on the rear side of the seat cushion (3), and a foot rest seat (54) slidably arranged on the bottom of the seat cushion (3);

an angle adjusting device (1) is fixedly arranged at the bottom of the seat cushion (3), the angle adjusting device (1) comprises a chassis (11) fixedly arranged at the bottom of the seat cushion (3) and a rotating piece (12) rotatably arranged on the chassis (11), and the rotating piece (12) is connected with a backrest (42) through a connecting pipe (41);

the chassis (11) is connected with the rotating piece (12) through a fastening piece (13), the fastening piece (13) is movably connected with the chassis (11) and the rotating piece (12), and a handle (16) capable of poking the fastening piece (13) is further rotatably arranged on the chassis (11).

2. The multifunctional chair with simple angle adjustment according to claim 1, wherein the bottoms of the left and right sides of the seat cushion (3) are provided with strip notches (31), and the top ends of the supporting frames (2) are arranged in the notches (31).

3. The multifunctional chair with simple angle adjustment according to claim 2, characterized in that the support frame (2) comprises a bottom frame (21), the bottom frame (21) comprises an i-shaped base (211) and a first support pipe (212) arranged on the base (211), and a first adjustment hole (213) is arranged on the first support pipe (212); and the support frame (2) further comprises an upper frame (23) arranged in the first joint pipe (212) through a pipe sleeve (22), the upper frame (23) comprises a second joint pipe (231) sleeved in the first joint pipe (212) and a transverse pipe (233) arranged at the top end of the second joint pipe (231), the transverse pipe (233) is arranged in the notch (31), a second adjusting hole (232) corresponding to the first adjusting hole (213) in position is arranged in the second joint pipe (231), and an adjusting nail penetrates through the first adjusting hole (213) and the second adjusting hole (232).

4. The multifunctional chair with simple angle adjustment according to claim 2, characterized in that two sliding seats (51) are arranged on the inner sides of two side notches (31) at the bottom of the seat cushion (3), two sliding rods (52) are arranged in the sliding seats (51) in a sliding manner, one ends, close to the front side of the seat cushion (3), of the two sliding rods (52) are connected through a connecting rod (53), and a foot rest seat (54) is arranged on the connecting rod (53).

5. The multifunctional chair with simple angle adjustment according to claim 1, characterized in that the chassis (11) is U-shaped, and first openings (111) are arranged on two sides of the U-shaped chassis (11) near the rotating member (12), and the first openings (111) are arranged near the bottom edge of the U-shaped chassis (11); and the rotating piece (12) is U-shaped, two side edges of the rotating piece (12) are arranged on the outer sides of two side edges of the chassis (11), and a second opening (121) is arranged on the two side edges of the rotating piece (12) at a position corresponding to the first opening (111), and a first connecting nail (151) penetrates through the first opening (111) and the second opening (121).

6. The multifunctional chair with simple angle adjustment according to claim 5, characterized in that a third opening (112) and a fourth opening (113) are respectively arranged on two sides of the U-shaped groove-shaped chassis (11) close to the rotating piece (12), and the third opening (112) and the fourth opening (113) are arranged close to the opening of the U-shaped groove-shaped chassis (11); and a shaft (14) passing through the third opening (112) and the fourth opening (113) on both sides, wherein the diameter of the shaft (14) is smaller than that of the third opening (112), and the diameter of the third opening (112) is smaller than that of the fourth opening (113); and a fixing nut (17) sleeved on the penetrating shaft (14) is arranged outside the third opening (112);

a fifth opening (122) is further arranged on two side edges of one end, far away from the second opening (121), of the rotating piece (12), and a second connecting nail (152) is arranged, and the second connecting nail (152) penetrates through the fifth openings (122) on two sides;

one end of the fastener (13) close to the penetrating shaft (14) is provided with a first perforation (131), the first perforation (131) is sleeved on the periphery of the penetrating shaft (14) between two side edges of the chassis (11), and one end of the fastener (13) close to the second connecting nail (152) is provided with a second perforation (132), the second perforation (132) is a long hole, and the second perforation (132) is sleeved on the periphery of the second connecting nail (152) between two side edges of the rotating piece (12).

7. The multifunctional chair with simple angle adjustment according to claim 6, characterized in that a U-shaped groove-shaped connecting piece (117) is arranged outside the fourth opening (113), and the connecting piece (117) is perpendicular to the side edge of the chassis (11) and is consistent with the opening direction of the chassis (11); the handle (16) comprises a rotating shaft (161) arranged in two side edges of the connecting piece (117), a connecting rod (162) connected to the side wall of the rotating shaft (161) far away from the fourth perforation side, a handheld part (163) arranged at one end of the connecting rod (162) far away from the rotating shaft (161), and a wedge part (164) arranged on the side wall of the rotating shaft (161) near the fourth perforation side, wherein the wedge part (164) is clamped between the penetrating shaft (14) and the fourth perforation (113).

8. The multifunctional chair with simple angle adjustment according to claim 7, characterized in that a connecting ring (114) is further extended inwards on the inner side of the fourth opening (113) on the side where the connecting piece (117) is arranged, the diameter of the connecting ring (114) is the same as the diameter of the fourth opening (113), and the wedge part (164) is clamped between the penetrating shaft (14) and the fourth opening (113) and/or the connecting ring (114);

and a connecting plate (115) which is positioned on the same plane with the bottom edge of the chassis (11) is further arranged on the chassis (11), a first mounting hole (116) is formed in the connecting plate (115), a screw penetrates through the first mounting hole (116) to be arranged at the bottom of the seat cushion (3), a second mounting hole (123) is formed in the rotating piece (12), and the screw penetrates through the second mounting hole (123) to be arranged on the connecting pipe (41).

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