CN219165999U - Multi-functional chair that can multi-angle be expanded - Google Patents

Abstract

The utility model relates to a multi-functional chair capable of being unfolded at multiple angles, which comprises a lower support frame and an upper support frame sleeved on the lower support frame, wherein a seat is fixedly arranged at the top end of the upper support frame, a rotating piece is arranged at the front side and the rear side of the upper support frame, the rotating piece comprises a fixed piece fixed on the upper support frame and a rotating piece capable of being rotatably arranged on the fixed piece at a certain angle, a first support tube is fixedly arranged on the rotating piece of the rotating piece arranged at the front side of the upper support frame, a foot rest seat is fixedly arranged at the upper end of the first support tube, a second support tube is fixedly arranged on the rotating piece of the rotating piece arranged at the rear side of the upper support frame, and a semi-wrapping chair back is fixedly arranged on the side face, close to the seat, of the second support tube. The multifunctional chair of this scheme has foot rest and the back of the chair that can certain angle modulation, and the back of the chair after expanding and the foot rest can supply the student to recline, and not the complete level expansion has solved the problem of noon break under the circumstances that does not occupy great space.

Description

Multi-functional chair that can multi-angle be expanded

Technical Field

The utility model belongs to the technical field of multifunctional chairs, and particularly relates to a multifunctional chair capable of being unfolded at multiple angles.

Background

At present, most schools generally have small indoor area and space, and a large number of people are required, so that the students are difficult to provide lying conditions. In the market, a noon break bed capable of directly lying and sleeping or a noon break bed capable of being folded is provided, but for the noon break bed capable of directly lying at 180 degrees, too much space is occupied for placement and unfolding, and many situations still cannot meet the condition that students in whole class can only one bed in a classroom.

Therefore, how to design a chair with a tiltable backrest to use the space between desks and hallways is a subject of concern.

Disclosure of Invention

The utility model provides a multi-angle-unfolding multifunctional chair which is integrally formed and provided with a foot rest and a chair back which can be adjusted at a certain angle, and solves the problem of noon break by enabling students to recline after unfolding under the condition that the incomplete flat unfolding occupies more space.

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

the utility model provides a but multi-functional chair of multi-angle expansion, includes the upper support frame on the lower support frame is located to lower support frame and cover, and the top of upper support frame is fixed and is provided with the seat support, and the front side and the rear side of this upper support frame all set up a rotation piece, wherein, set up the fixed first stay tube that sets up on the rotation piece of upper support frame front side, the fixed foot rest seat that is provided with of upper end of this first stay tube, the fixed second stay tube that sets up on the rotation piece of upper support frame rear side, the fixed half parcel formula back of the chair that is provided with on the side that is close to the seat support of this second stay tube.

Preferably, the rotating member comprises a fixing plate fixed on the upper supporting frame and a rotating plate capable of rotating at a certain angle and arranged on the fixing plate, wherein a first supporting tube is fixedly arranged on the rotating plate of the rotating member arranged on the front side of the upper supporting frame, and a second supporting tube is fixedly arranged on the rotating plate of the rotating member arranged on the rear side of the upper supporting frame.

Preferably, the lower support frame comprises an I-shaped base and a lower support tube vertically arranged at the top end of the intersection of two sides of the I-shaped base, a plurality of first adjusting holes are formed in the inner side of the top of the lower support tube, and foot pads wrapped up and down are arranged at four corners of the I-shaped base.

Preferably, the upper support frame comprises an upper seat arranged at the bottom end of the seat, the upper seat at least comprises two transverse pipes corresponding to the width between two lower support pipes, the upper seat further comprises a joint pipe arranged between the two transverse pipes and a joint pipe arranged between the transverse pipes and the joint pipe, the bottom ends of the two transverse pipes are provided with two upper support pipes, the upper support pipes are sleeved in the lower support pipes, the inner sides of the two upper support pipes are provided with a plurality of second adjusting holes, and the positioning pins penetrate through the second adjusting holes and the first adjusting holes; and a plurality of first fixing holes are formed at the left side and the right side of the front side and the rear side of the connecting pipe, and the first fixing holes are fixedly connected with the fixing pieces of the rotating piece.

Preferably, the fixing piece comprises a first connecting piece and a limiting piece arranged at one end of the first connecting piece, which is close to the rotating piece, wherein the first connecting piece is provided with second fixing holes corresponding to the positions and the numbers of a plurality of first fixing holes arranged on the bearing pipe, and the screws penetrate through the second fixing holes and the first fixing holes; the middle part of the limiting piece is provided with a first perforation, two sides of the first perforation are provided with two limiting grooves which are symmetrical by taking the first perforation as a center, the limiting grooves are formed by right-angle sides facing the opening of the first perforation and multi-section arc sides opposite to the right-angle sides, the multi-section arc sides comprise a major arc connected with one end of the right-angle sides and a minor arc arranged between the other end of the major arc and the other end of the right-angle sides, and the inner arc of the minor arc faces the first perforation; and an elastic sheet is arranged in the limiting groove, the elastic sheet comprises an arc part clamped at the major arc of the limiting groove, one end of the arc part close to one side of the right-angle side of the limiting groove is connected with a first straight part, the other end of the arc part is connected with a second straight part, the shape of the arc part corresponds to the major arc of the limiting groove, and a certain included angle is formed between the first straight part and the right-angle side close to the major arc of the limiting groove.

Preferably, the rotating piece comprises a second connecting piece and two clamping pieces which are oppositely arranged at one end, close to the fixing piece, of the second connecting piece, a second through hole is formed in the middle of the clamping piece, two clamping grooves which are symmetrical with the second through hole as a center are formed in two sides of the second through hole, and the limiting piece is arranged between the two clamping pieces and provided with a rivet penetrating through the first through hole and the second through hole; the clamping groove consists of a toothed arc edge and a plurality of sections of edges opposite to the arc edge, the plurality of sections of edges comprise a vertical edge connected with one end of the toothed arc edge, the other end of the vertical edge is connected with a semicircular arc edge, the other end of the semicircular arc edge is connected with a flat edge, the other end of the flat edge is connected with the other end of the toothed arc edge, the inner arc of the semicircular arc edge faces the second perforation, and the toothed arc edge of the clamping groove is a minor arc; the copper sheets are arranged in the two clamping grooves at the corresponding positions of the two clamping sheets oppositely arranged, one end of each copper sheet is propped against the toothed arc edge of the corresponding clamping groove, the other end of each copper sheet is propped against the multi-section edge of the opposite side of the toothed arc edge of the corresponding clamping groove, each copper sheet penetrates through the space between the elastic sheet in the corresponding limiting groove and the inferior arc of the corresponding limiting groove, and the first straight part of each elastic sheet is pressed on each copper sheet; and a plurality of third fixing holes are formed in the second connecting sheet.

Preferably, the first support tube and the second support tube are provided with fourth fixing holes on both sides near one end of the rotating member, and the rivet penetrates through the third fixing holes and the fourth fixing holes.

Preferably, two first decorative covers are symmetrically arranged on the upper side and the lower side of the two ends of the connecting pipe, which are provided with the fixing sheets, and each first decorative cover comprises a half-wrapped square frame and a half-hollow cylindrical wrapping frame arranged at one end of the square frame, which is close to the rotating sheets; and two second decorative covers are symmetrically arranged on the upper side and the lower side of the end parts of the first support tube and the second support tube, which are provided with rotating sheets, the second decorative covers comprise a half-wrapped square frame and a half-wrapped frame which is arranged at one end of the square frame, which is close to the fixing sheets, wherein the half-wrapped frame of the second decorative cover is wrapped on the periphery of the clamping sheets, and the half-hollow cylindrical wrapped frame of the first decorative sheet is positioned on the inner side of the half-wrapped frame of the second decorative sheet.

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

1. the integrated into one piece bracket seat can carry out different inclination and adjust through rotating the piece, satisfies the student when noon break, and the foot is the slope and drops the state supported, lets the foot obtain comfortable rest and relax.

2. The integrally formed chair back and the semi-bag type curved surface radian ergonomic shape, whether in sitting or lying state, can enable the body to be supported by the semi-bag, and comfortable support and relaxation can be obtained. Meanwhile, different inclination angles are adjusted through the rotating piece, so that students can lie obliquely and comfortably, and space is saved compared with 180-degree lying.

3. The seat of the lower support frame of the chair is I-shaped and is more stable and has longer support length than that of a common desk and chair.

4. The connecting piece of the adjustable chair seat, the chair back and the foot rest seat are provided with decorative covers for safety protection and anti-pinch design.

Drawings

FIG. 1 is a schematic view of an exploded structure of a multi-angle deployable multifunctional chair of the present utility model.

Fig. 2 is a schematic view of an undeployed three-dimensional structure of the multifunctional chair of the present utility model after assembly.

Fig. 3 is a schematic perspective view of the bottom view of fig. 2.

Fig. 4 is a schematic perspective view of the multifunctional chair of the present utility model after being assembled and unfolded.

Fig. 5 is a schematic perspective view of the bottom view of fig. 4.

Fig. 6 is a schematic view showing a process of gradually unfolding the multifunctional chair according to the present utility model from a folded state.

Fig. 7 is a schematic perspective view of a limiting plate.

Fig. 8 is a schematic front view of the limiting plate.

Fig. 9 is a schematic perspective view of the rotor plate.

Fig. 10 is a schematic front view of the rotor plate.

FIG. 11 is a schematic view of the rotation process of the rotary member.

Wherein:

1, a lower support frame, 11 bases, 12 lower support pipes, 121 first adjusting holes, 13 foot pads and 14 pipe sleeves;

2 upper support frame, 21 upper seat, 211 horizontal tube, 212 bearing tube, 2121 first fixing hole, 22 upper support tube, 221 second adjusting hole;

3 a rotating piece, a 31 fixing piece, a 311 first connecting piece, a 3111 second fixing hole, a 312 limiting piece, a 3121 limiting groove and a 3122 first perforation; 32 rotating plates, 321 second connecting plates, 3211 third fixing holes, 322 clamping plates, 3221 clamping grooves, 3222 teeth and 3223 second through holes; 33, 331 arc, 332 first straight portion, 333 second straight portion; 34 copper sheets;

41 a first support tube, 42 a foot-separating seat, 43 a second support tube, 44 a chair back and 45 a fourth fixing hole;

51 a first decorative cover, 52 a second decorative cover;

6, a chair seat.

Detailed Description

The utility model provides a multi-angle unfolding multifunctional chair, which comprises a lower support frame 1 and an upper support frame 2 sleeved on the lower support frame 1, wherein the top end of the upper support frame 2 is fixedly provided with a seat 6, the front side and the rear side of the upper support frame 2 are respectively provided with a rotating piece 3, the rotating piece 3 comprises a fixed piece 31 fixed on the upper support frame 2 and a rotating piece 32 capable of rotating at a certain angle and arranged on the fixed piece 31, wherein a first support tube 41 is fixedly arranged on the rotating piece 3 arranged on the front side of the upper support frame 2, specifically, the rotating piece 32 of the rotating piece 3 arranged on the front side of the upper support frame 2 is fixedly provided with a first support tube 41, the upper end of the first support tube 41 is fixedly provided with a foot rest seat, wherein the upper end of the upper support tube refers to the upper end face which is opposite to the first support tube 41 after being unfolded, the foot rest seat can be conveniently placed on the seat 6, thus, the foot rest can be folded to the bottom of the seat 6 when the foot rest is not used, the foot rest can be unfolded, the space is not occupied, and the foot rest can be better rest for the foot rest when the foot rest is used. And, set up the fixed second stay tube 43 that sets up on the rotating member 3 of upper bracket 2 rear side, specifically, set up the fixed second stay tube 43 that sets up on the rotating piece 32 of rotating member 3 of upper bracket 2 rear side, the fixed half parcel formula back of the chair 44 that is provided with on the side that is close to seat support 6 of this second stay tube 43, preferably this half parcel formula back of the chair 44 means when leaning on back of the chair 44, the waist both sides position inwards includes for have fine parcel nature under the position of sitting and lying the appearance condition. And as shown in fig. 3, the foot rest stand and the chair back 44 are provided with semi-wrapped plastic shells at the connection positions of the first support tube 41 and the second support tube 43 respectively, the first support tube 41 and the second support tube 43 are fixedly arranged between the foot rest stand and the chair back 44 and the plastic shells respectively, the support tube is prevented from being exposed, the abrasion consumption or damage of the support tube is prevented, and the use safety is improved.

In one embodiment, as shown in fig. 1 and 2, the lower support frame 1 comprises an i-shaped base 11 and a lower support tube 12 vertically arranged at the top end of the intersection of two sides of the i-shaped base 11, a plurality of first adjusting holes 121 are formed in the inner side of the top of the lower support tube 12, foot pads 13 wrapped up and down are arranged at four corners of the i-shaped base 11, so that the exposed base 11 is prevented from bumping feet, the stability of the chair is improved, and as shown in fig. 1, the four end feet of the i-shaped base 11 are inclined, the foot pads 13 are of buffer structures which incline inwards gradually from bottom to top at the inclined positions, and the problem that the foot pads 11 are easy to bump in the right-angle structure of the base 11 is further avoided.

Preferably, as shown in fig. 1, the upper support frame 2 includes an upper seat 21 disposed at the bottom end of the seat 6, the upper seat 21 includes at least two transverse tubes 211 corresponding to the width between the two lower support tubes 12, the upper seat 21 further includes a support tube 212 disposed between the two transverse tubes 211 and a connection tube between the transverse tubes 211 and the support tube 212, two upper support tubes 22 are disposed at the bottom ends of the two transverse tubes 211, the upper support tubes 22 are sleeved inside the lower support tubes 12, and a plurality of second adjusting holes 221 are disposed inside the two upper support tubes 22, and the positioning pins pass through the second adjusting holes 221 and the first adjusting holes 121, which can be other common devices for realizing the up-down adjustment of the upper support tubes 22 in the lower support tubes 12, so as to facilitate the adjustment of the height of the chair if necessary; and, a plurality of first fixing holes 2121 are provided at both left and right sides of the front and rear sides of the adapter 212, and the first fixing holes 2121 are fixedly connected to the fixing piece 31 of the rotating member 3. In one embodiment, as shown in fig. 1, a sleeve 14 may also be provided at the junction of the upper support tube 22 and the lower support tube 12 to improve the stability of the connection between the lower support frame 1 and the upper support frame 2.

And, as shown in fig. 1, 7 and 8, the fixing piece 31 includes a first connection piece 311 and a limiting piece 312 provided at one end of the first connection piece 311 near the rotating piece 32, wherein the first connection piece 311 is provided with second fixing holes 3111 corresponding to the positions and the number of the plurality of first fixing holes 2121 provided on the receiving pipe 212, and a screw passes through the second fixing holes 3111 and the first fixing holes 2121 to fix the rotating piece 3; the middle part of the limiting piece 312 is provided with a first perforation 3122, and two limiting grooves 3121 which are symmetrical with the first perforation 3122 as a center are arranged at two sides of the first perforation 3122, the limiting groove 3121 is surrounded by a right-angle side which is opened towards the first perforation 3122 and a plurality of sections of arc sides which are opposite to the right-angle side, each section of arc side comprises a major arc connected with one end of the right-angle side and a minor arc arranged between the other end of the major arc and the other end of the right-angle side, wherein the inner arc of the minor arc is towards the first perforation 3122; the elastic piece 33 is disposed in the limiting slot 3121, the elastic piece 33 includes an arc portion 331 clamped at the major arc of the limiting slot 3121, and a first straight portion 332 is connected to one end of the arc portion 331 near one side of the right-angle side of the limiting slot 3121, and a second straight portion 333 is connected to the other end of the arc portion 331, however, the second straight portion 333 may not be set up, so that the stability of the elastic piece 33 and the clamping of the copper sheet 34 can be achieved; wherein the shape of the arc portion 331 corresponds to the major arc of the limiting groove 3121, and the first straight portion 332 forms an angle with the right-angle side near the major arc of the limiting groove 3121. Wherein only one embodiment of the limiting groove 3121 is described herein, the limiting groove 3121 is configured to clamp the elastic sheet 33 and elastically press the elastic sheet 33 against the copper sheet 34 described later.

As shown in fig. 9 and 10, the rotating plate 32 includes a second connecting plate 321 and two clamping plates 322 disposed opposite to each other at one end of the second connecting plate 321 near the fixing plate 31, a second through hole 3223 is disposed in the middle of the clamping plate 322, two clamping grooves 3221 symmetrical about the second through hole 3223 are disposed at two sides of the second through hole 3223, and the limiting plate 312 is disposed between the two clamping plates 322 and has a rivet passing through the first through hole 3122 and the second through hole 3223; the clamping groove 3221 is composed of an arc edge with teeth 3222 and a plurality of sections of edges opposite to the arc edge, each section of edge comprises a vertical edge connected with one end of the arc edge with teeth 3222, the other end of the vertical edge is connected with a semicircular arc edge, the other end of the semicircular arc edge is connected with a flat edge, the other end of the flat edge is connected with the other end of the arc edge with teeth 3222, wherein the inner arc of the semicircular arc edge faces the second perforation 3223, and the arc edge with teeth 3222 of the clamping groove 3221 is a minor arc; and two clamping grooves 3221 of the corresponding positions of the two opposite clamping sheets 322 are internally provided with copper sheets 34 which span the two clamping grooves 3221, one end of each copper sheet 34 is propped against the arc edge of the toothed section 3222 of the corresponding clamping groove 3221, the other end is propped against the multi-section edge opposite to the arc edge of the toothed section 3222 of the corresponding clamping groove 3221, each copper sheet 34 passes through the space between the elastic sheet 33 in the limiting groove 3121 and the minor arc of the limiting groove 3121, and the first straight part 332 of each elastic sheet 33 is pressed on each copper sheet 34; and, the second connecting piece 321 is provided with a plurality of third fixing holes 3211.

And as shown in fig. 1, the two sides of the first support tube 41 and the second support tube 43, which are close to one end of the rotating member 3, are respectively provided with a fourth fixing hole 45, and rivets pass through the third fixing hole 3211 and the fourth fixing hole 45, so that the first support tube 41 and the second support tube 43 are respectively connected to the rotating pieces 32 of the rotating member 3 on the front side and the rear side, and the rotation of the leg rest clamp on the first support tube 41 and the chair back 44 on the second support tube 43 relative to the chair seat 6 is realized by means of the rotating member 3, so as to meet different use situations.

In one embodiment, as shown in fig. 7-11, the limiting piece 312 of the fixing piece 31 is disposed between two opposite positioning pieces 322, and a pin or other fixing component rotates through the first through hole 3122 of the limiting piece 312 and the two second through holes 3223 of the two positioning pieces 322, so as to realize the relative rotation of the limiting piece 312 and the positioning pieces 322. The principle of the specified angle is that the copper sheet 34 passes through the clamping groove 3221 and the limiting groove 3121, one end of the copper sheet 34 in the limiting groove 3121 is propped against the right-angle edge pointed by the first straight part 332 of the elastic sheet 33 in the limiting groove 3121, the other end is propped against the arc edge or the end part of the second straight part 333 of the elastic sheet 33, and the first straight part 332 of the elastic sheet 33 is pressed on the copper sheet 34, so that the elastic fixation of the copper sheet 34 on the limiting sheet 312 is realized; accordingly, the copper sheet 34 in the catch 322 has one end abutting against the teeth 3222 of the catch 3221 on the straight side of the catch 3121 and the other end abutting against the multiple sides opposite the teeth 3222 of the catch 3221. As shown in fig. 11, when an external force is applied to rotate the spacing piece 312 and the clamping piece 322 relatively, the copper piece 34 is separated from the teeth 3222 of the original clamping position, so that one end of the copper piece 34, which is close to the teeth 3222, moves along the teeth 3222 of the arc edge, the other end of the copper piece 34 moves along the multiple sections of the opposite sides of the teeth 3222, after the copper piece 34 moves to a designated angle, the external force disappears, the copper piece 34 is clamped on the new teeth 3222, and under the pressure of the first straight part 332 of the elastic piece 33, the copper piece 34 is fixed on the teeth 3222, and further the rotation of the rotating piece 32 is completed, namely the folding and unfolding of the chair back 44 and the leg rest 42 are realized. As shown in the last state diagram of fig. 11, under the elastic fixation of the limiting piece 312 and the elastic piece 33, one end of the copper piece 34 abuts against the tooth 3222, and the other abuts against the straight edge opposite to the tooth 3222 of the clamping groove 3221, the whole rotating piece 3 is in a right angle state, and the corresponding rotating piece 3 between the chair back 44 and the chair seat 6 is in a right angle state between the chair back 44 and the chair seat 6.

Preferably, when one end of the copper sheet 34 abuts against two ends of the arc edge of the toothed portion 3222 of the clamping groove 3221, the copper sheet 34 is in a non-rotating state and a rotating maximum angle state of the rotating member 3 respectively, the corresponding non-rotating state is that the leg rest seat 42 is completely retracted, the chair seat 6 is in an upright state, the corresponding rotating maximum angle state is that the leg rest seat 42 is completely unfolded, and the chair seat 6 is rotated to an inclined state, and when the inclined state is adopted, the included angle between the chair back 44 and the chair seat 6 is smaller than 180 degrees, preferably, the space between the front desk and the rear desk or the space between two rows of desks can be fully utilized when the chair back 44 is in the fully unfolded state, so that the normal use of the chair is ensured under the condition that more space is not occupied, and better noon break conditions can be provided. In addition, since the rotating piece 32 and the fixing piece 31 rotate relatively, the rotating piece 32 structure in this embodiment can be fixedly arranged on the support pipe 212, and the fixing piece 31 structure in this embodiment can be fixedly arranged on the first support pipe 41 and the second support pipe 43, so that the same function can be achieved.

Fig. 11 is a schematic view showing a process of rotating the rotating member 3 by a rotation angle. Only the stopper piece 312 is shown in the figure, and one end of the stopper piece 312 away from the rotation piece 32 is connected to the first connecting piece 311. Fig. 6 is a schematic view of the corresponding seat back 44 and leg rest 42 gradually unfolding under the drive of the rotating member 3.

As shown in fig. 1, 4 and 5, two first decorative covers 51 are symmetrically disposed on the upper and lower sides of the two ends of the adaptor 212 where the fixing piece 31 is disposed, and the first decorative covers 51 include a half-wrapped square frame and a half-hollow cylindrical wrapping frame disposed at one end of the square frame near the rotating piece 32; and two second decoration covers 52 are symmetrically arranged on the upper and lower sides of the end parts of the first support tube 41 and the second support tube 43 where the rotating piece 32 is arranged, the second decoration covers 52 comprise a half-wrapped square frame and a half-round wrapping frame arranged at one end of the square frame near the fixing piece 31, wherein the half-round wrapping frame of the second decoration cover 52 wraps the periphery of the clamping piece 322, and the half-hollow cylindrical wrapping frame of the first decoration piece is positioned at the inner side of the half-round wrapping frame of the second decoration piece, so that the two half-round wrapping frames of the second decoration piece wrap the clamping pieces 322 at the outermost ends of the two sides, and the half-hollow cylindrical wrapping frame of the first decoration piece wraps the part of the bearing tube 212 between the two side clamping pieces 322, so that the rotating piece 32 is not exposed to the outside, the service life is prolonged, and the use safety is also improved.

The above only shows the preferred embodiments, and the setting angles, materials and the like of the specific components can be adjusted according to the actual engineering requirements, and the utility model also belongs to the protection scope of the utility model.

Claims (8)

1. The utility model provides a but multi-functional chair of multi-angle expansion, a serial communication port, including lower carriage (1) and cover locate upper bracket (2) on lower carriage (1), the fixed seat (6) that is provided with in top of upper bracket (2), the front side and the rear side of this upper bracket (2) all set up one and rotate piece (3), wherein, set up fixed first stay tube (41) on rotating piece (3) of upper bracket (2) front side, the upper end of this first stay tube (41) is fixedly provided with foot rest (42), set up fixed second stay tube (43) on rotating piece (3) of upper bracket (2) rear side, the fixed back of the chair (44) that is provided with on the side that is close to seat (6) of this second stay tube (43).

2. The multi-angle deployable multifunctional chair according to claim 1, wherein the rotating member (3) comprises a fixing plate (31) fixed on the upper supporting frame (2) and a rotating plate (32) rotatably arranged on the fixing plate (31) at a certain angle, wherein a first supporting tube (41) is fixedly arranged on the rotating plate (32) of the rotating member (3) arranged on the front side of the upper supporting frame (2), and a second supporting tube (43) is fixedly arranged on the rotating plate (32) of the rotating member (3) arranged on the rear side of the upper supporting frame (2).

3. The multi-angle expandable multifunctional chair according to claim 2, wherein the lower support frame (1) comprises an i-shaped base (11) and a lower support tube (12) vertically arranged at the top end of the intersection of two sides of the i-shaped base (11), a plurality of first adjusting holes (121) are formed in the inner side of the top of the lower support tube (12), and foot pads (13) wrapped up and down are arranged at four corners of the i-shaped base (11).

4. A multi-angle deployable multifunctional chair according to claim 3, wherein the upper support frame (2) comprises an upper seat (21) arranged at the bottom end of the seat (6), the upper seat (21) at least comprises two transverse pipes (211) corresponding to the width between the two lower support pipes (12), the upper seat (21) further comprises a connecting pipe (212) arranged between the two transverse pipes (211) and a connecting pipe between the transverse pipes (211) and the connecting pipe (212), the bottom ends of the two transverse pipes (211) are provided with two upper support pipes (22), the upper support pipes (22) are sleeved inside the lower support pipes (12), a plurality of second adjusting holes (221) are arranged inside the two upper support pipes (22), and the positioning pins penetrate through the second adjusting holes (221) and the first adjusting holes (121); and, the left and right sides of the front and back sides of the adapter tube (212) are provided with a plurality of first fixing holes (2121), and the first fixing holes (2121) are fixedly connected with the fixing piece (31) of the rotating piece (3).

5. The multi-angle deployable multifunctional chair as claimed in claim 4, wherein the fixing piece (31) comprises a first connecting piece (311) and a limiting piece (312) arranged at one end of the first connecting piece (311) near the rotating piece (32), wherein the first connecting piece (311) is provided with second fixing holes (3111) corresponding to the positions and the numbers of the first fixing holes (2121) arranged on the receiving tube (212), and the screw passes through the second fixing holes (3111) and the first fixing holes (2121); the middle part of the limiting piece (312) is provided with a first perforation (3122), two limiting grooves (3121) which are symmetrical by taking the first perforation (3122) as a center are arranged at two sides of the first perforation (3122), the limiting groove (3121) is surrounded by a right-angle side which is opened towards the first perforation (3122) and a plurality of sections of arc sides which are opposite to the right-angle side, each section of arc side comprises a major arc connected with one end of the right-angle side and a minor arc arranged between the other end of the major arc and the other end of the right-angle side, wherein the inner arc of the minor arc is towards the first perforation (3122); and an elastic sheet (33) is arranged in the limiting groove (3121), the elastic sheet (33) comprises an arc part (331) clamped at the major arc of the limiting groove (3121), one end of the arc part (331) close to one side of the right-angle side of the limiting groove (3121) is connected with a first straight part (332), the other end of the arc part (331) is connected with a second straight part (333), the shape of the arc part (331) corresponds to the major arc of the limiting groove (3121), and the first straight part (332) forms a certain included angle with the right-angle side close to the major arc of the limiting groove (3121).

6. The multi-angle unfolding multifunctional chair according to claim 5, wherein the rotating piece (32) comprises a second connecting piece (321) and two clamping pieces (322) which are oppositely arranged at one end, close to the fixing piece (31), of the second connecting piece (321), a second through hole (3223) is formed in the middle of the clamping piece (322), two clamping grooves (3221) which are symmetrical with the second through hole (3223) as a center are formed in two sides of the second through hole (3223), the limiting piece (312) is arranged between the two clamping pieces (322), and rivets penetrate through the first through hole (3122) and the second through hole (3223); the clamping groove (3221) is composed of an arc edge with teeth (3222) and a plurality of sections of edges on the opposite sides of the arc edge, each section of edge comprises a vertical edge connected with one end of the arc edge with the teeth (3222), the other end of the vertical edge is connected with a semicircular arc edge, the other end of the semicircular arc edge is connected with a flat edge, the other end of the flat edge is connected with the other end of the arc edge with the teeth (3222), the inner arc of the semicircular arc edge faces the second perforation (3223), and the arc edge with the teeth (3222) of the clamping groove (3221) is a minor arc; a copper sheet (34) crossing the two clamping grooves (3221) is arranged in the two clamping grooves (3221) at the corresponding positions of the two opposite clamping sheets (322), one end of the copper sheet (34) is propped against the arc edge of the toothed belt (3222) of the clamping groove (3221), the other end is propped against the multi-section edge of the opposite side of the arc edge of the toothed belt (3222) of the clamping groove (3221), the copper sheet (34) passes through the space between the elastic sheet (33) in the limiting groove (3121) and the minor arc of the limiting groove (3121), and the first straight part (332) of the elastic sheet (33) is pressed on the copper sheet (34); and a plurality of third fixing holes (3211) are formed in the second connecting piece (321).

7. The multi-angle deployable multifunctional chair as claimed in claim 6, wherein the first support tube (41) and the second support tube (43) are provided with fourth fixing holes (45) on both sides near one end of the rotating member (3), and rivets are provided through the third fixing holes (3211) and the fourth fixing holes (45).

8. The multi-angle deployable multifunctional chair as claimed in claim 6, wherein two first decorative covers (51) are symmetrically provided at upper and lower sides of the two ends of the receiving tube (212) where the fixing piece (31) is provided, the first decorative covers (51) comprising a half-wrapped square frame and a half-hollow cylindrical wrapping frame provided at one end of the square frame near the rotating piece (32); and two second decoration covers (52) are symmetrically arranged on the upper side and the lower side of the end parts of the first support tube (41) and the second support tube (43) where the rotating sheet (32) is arranged, the second decoration covers (52) comprise a square frame which is semi-wrapped and a semi-circular wrapping frame which is arranged at one end of the square frame and is close to the fixing sheet (31), wherein the semi-circular wrapping frame of the second decoration covers (52) wraps the periphery of the clamping sheet (322), and the semi-hollow cylindrical wrapping frame of the first decoration sheet is positioned at the inner side of the semi-circular wrapping frame of the second decoration sheet.

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