CN114271605A - Foldable desk and chair with protection function - Google Patents

Abstract

The invention relates to a desk and chair, in particular to a foldable desk and chair with a protection function. The technical problem to be solved is as follows: the foldable desk and chair with the protection function can be folded. The technical scheme of the invention is as follows: the utility model provides a folded cascade has safeguard function's desk chair, is including first mount, seatpad, spacing, first frame, second frame etc. the seatpad left and right sides all is provided with first mount, and first mount top front side all is provided with spacing, and first mount rear end all is provided with first frame, and first mount front side all is provided with the second frame. According to the invention, the rotator rotates to drive the protection frame to rotate upwards, then the screw is manually inserted into the limiting frame, and the protection frame is blocked and limited by the screw, so that the protection frame can protect the buttocks of people.

Description

Foldable desk and chair with protection function

Technical Field

The invention relates to a desk and chair, in particular to a foldable desk and chair with a protection function.

Background

School generally can use the desk chair, and current desk chair is single, generally comprises four desk chair leg and a seat.

CN202023199750.6 patent application number is a multi-functional desk chair of regulation formula, including the desk chair, the bottom both sides of desk chair all are provided with the supporting leg, and the top of every group supporting leg all is connected with the lift leg, every group the top of lift leg all is connected with the lift box, and the top of lift box is connected with the seat, the one end of seat is connected with the spliced pole, and the top of spliced pole is connected with the back, two the opposite side of lift box all is seted up the arc track, and the one end of arc track is provided with the gim peg, the inside of lift box is provided with a plurality of fixed stopper, and all is provided with the bolt hole between a plurality of fixed stopper, the gim peg is provided with the removal stopper with the bolt hole junction, the inside of back is provided with spacing strip, and the junction of spliced pole is provided with the kelly piece inside of spacing strip, be provided with the spring between spacing strip and the kelly piece, and both sides of the limiting strip are connected with L rods.

This multi-functional desk chair of regulation formula is through setting up arc track, gim peg, fixed stopper, bolt hole, removing the high regulatory function that realizes the desk chair such as stopper to make the desk chair can effectively go up and down, but can't fold the desk chair, so be not convenient for remove the desk chair, consequently research and development now can realize carrying on the folded cascade have safeguard function's desk chair.

Disclosure of Invention

In order to overcome the defect that the prior adjustable multifunctional desk and chair can not be folded, the technical problem to be solved is that: the foldable desk and chair with the protection function can be folded.

The technical scheme of the invention is as follows: the utility model provides a folded cascade has safeguard function's desk chair, including first mount, the seatpad, spacing, first frame, the second frame, the protection frame, protection machanism, back mechanism, foreleg supporting mechanism and screens mechanism, the seatpad left and right sides all is provided with first mount, first mount top front side all is provided with spacing, first mount rear end all is provided with first frame, first mount front side all is provided with the second frame, seatpad bottom front side is provided with protection machanism, the last protection frame that is provided with of protection machanism, be provided with back mechanism between first mount and the first frame, be provided with hind leg supporting mechanism between the mount, be provided with foreleg supporting mechanism between the first mount, be provided with screens mechanism on the seatpad.

According to a preferable technical scheme of the invention, the protection mechanism comprises a fixed plate, a rotator and first torsion springs, the fixed plates are arranged on the left side and the right side of the front side of the bottom of the seat cushion, the rotator is rotatably connected between the fixed plates, the left side and the right side of the rotator are connected with the protection frame, and the two first torsion springs are arranged between the protection frame and the fixed plates.

As a preferred technical solution of the present invention, the backrest mechanism includes a backrest chair, a first rotating shaft, a first gear and a second torsion spring, the first rotating shaft is rotatably connected between the rear portion of the first fixing frame and the first frame, the backrest chair is disposed between the first rotating shafts, the first gear is disposed on the inner side of each first rotating shaft, the second torsion spring is disposed between each first rotating shaft and the first fixing frame, and when the first rotating shaft rotates, the first rotating shaft rotates.

As a preferable technical scheme of the invention, the rear leg supporting mechanism comprises a first supporting frame, a limiting rod, a second rotating shaft, a second gear and a third gear, wherein the rear part of the first fixing frame is rotatably connected with the second rotating shaft, the second rotating shaft is positioned at the rear side of the first rotating shaft, the inner sides of the second rotating shafts are respectively provided with the second gear, the second gear is meshed with the adjacent first gear, the middle part of the second rotating shaft is respectively provided with the third gear, the outer sides of the second rotating shafts are respectively provided with the first supporting frame, and the first supporting frame is respectively provided with the limiting rod.

According to a preferable technical scheme, the front leg supporting mechanism comprises fixed shafts, a connecting frame, a rack frame, a fourth gear and a second supporting frame, the two fixed shafts are arranged at the rear part of the outer side of the first fixing frame, the connecting frame is connected between the two fixed shafts in a sliding mode, the rack frame is arranged at the bottom of the connecting frame, the second supporting frame is connected to the front side of the first fixing frame in a rotating mode, and the fourth gear is arranged on the outer side of the second supporting frame.

According to a preferable technical scheme of the invention, the clamping mechanism comprises an arc-shaped rail, clamping pins and tension springs, the arc-shaped rail is arranged on the left side and the right side of the bottom of the seat cushion, the clamping grooves are formed in the upper side and the lower side of the arc-shaped rail, the clamping pins are connected to the lower portion of the second support frame in a sliding mode, and the tension springs are arranged between the clamping pins and the second support frame.

The invention also comprises a guardrail handrail mechanism, wherein the guardrail handrail mechanism comprises a second fixing frame, a rotating rod, a third frame, a sliding rail, a slider, connecting iron sheets and handrail frames, the second fixing frame is arranged on the left side and the right side of the rear part of the backrest chair, the rotating rod is arranged on the second fixing frame, the third frame is arranged on the rear side of the top of the first fixing frame, the third frame is positioned on the front side of the fixing shaft, the sliding rail is connected on the third frame, the slider is connected on the sliding rail in a sliding manner, the connecting iron sheets are arranged on the slider, and the handrail frames are arranged on the top of the connecting iron sheets.

The storage mechanism comprises a storage frame, a closing plate, a first hinge, a second hinge and third torsion springs, the storage frame is arranged at the rear part of the backrest chair, the second hinges are arranged on the left side and the right side of the rear part of the backrest chair, the first hinge is rotatably connected to the second hinges, the two third torsion springs are arranged between the first hinge and the second hinge, and the closing plate is arranged between the bottoms of the first hinges.

Has the advantages that: 1. according to the invention, the rotator rotates to drive the protection frame to rotate upwards, then the screw is manually inserted into the limiting frame, and the protection frame is blocked and limited by the screw, so that the protection frame can protect the buttocks of people.

2. According to the invention, under the action of the tension spring, the clamping pin can be clamped into the clamping groove, the second support frame can be kept in a vertical or folded state, the stability of the specimen class seat can be improved in the vertical state, and people can conveniently collect the class seat in the folded state.

3. The invention adopts a mode of swinging, retracting or swinging and unfolding the backrest chair, so that the rotating rod jacks up the slider, or the slider freely descends, and further the armrest frame is lifted.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the present invention.

Fig. 3 is a schematic perspective view of a first protection mechanism according to the present invention.

Fig. 4 is a schematic perspective view of a second protection mechanism according to the present invention.

Fig. 5 is a schematic perspective view of the backrest mechanism of the present invention.

Fig. 6 is a schematic perspective view of a first rear leg support mechanism according to the present invention.

Fig. 7 is a schematic perspective view of a second rear leg support mechanism according to the present invention.

Fig. 8 is a schematic perspective view of the front leg support mechanism of the present invention.

Fig. 9 is a schematic perspective view of the locking mechanism of the present invention.

Fig. 10 is a schematic perspective view of a part of the locking mechanism of the present invention.

Fig. 11 is a schematic perspective view of the guardrail handrail mechanism of the present invention.

Fig. 12 is a schematic view of a first partial body structure of the guardrail armrest mechanism of the present invention.

Fig. 13 is a schematic view of a second partial structure of the guardrail armrest mechanism of the invention.

Fig. 14 is a perspective view of the storage mechanism of the present invention.

Fig. 15 is an enlarged perspective view of the invention at a.

Labeled as: 1-a first fixed frame, 2-a seat cushion, 3-a limiting frame, 4-a first frame, 41-a second frame, 5-a protecting frame, 6-a protecting mechanism, 61-a fixed plate, 62-a rotator, 63-a first torsion spring, 7-a backrest mechanism, 71-a backrest chair, 72-a first rotating shaft, 73-a first gear, 74-a second torsion spring, 8-a rear leg supporting mechanism, 81-a first supporting frame, 82-a limiting rod, 83-a second rotating shaft, 84-a second gear, 85-a third gear, 9-a front leg supporting mechanism, 91-a fixed shaft, 92-a connecting frame, 93-a rack frame, 94-a fourth gear, 95-a second supporting frame, 10-a clamping mechanism, 101-an arc track, 102-bayonet lock, 103-tension spring, 104-bayonet lock, 11-guardrail handrail mechanism, 111-second fixed frame, 112-rotating rod, 113-third frame, 114-sliding rail, 115-sliding device, 116-connecting iron sheet, 117-handrail frame, 12-storage mechanism, 121-storage frame, 122-closing plate, 123-first hinge, 124-second hinge and 125-third torsion spring.

Detailed Description

The invention is described in further detail below with reference to the drawings and the detailed description, but the invention is not limited to the scope of protection and application.

Example 1

A foldable desk and chair with protection function is disclosed, as shown in figures 1-10, comprising a first fixing frame 1, a seat cushion 2, a limiting frame 3, a first frame 4, a second frame 41, a protecting frame 5, a protecting mechanism 6, a backrest mechanism 7, a front leg supporting mechanism 9 and a clamping mechanism 10, wherein the seat cushion 2 is used for people to rest when sitting, the first fixing frame 1 is welded on the left side and the right side of the seat cushion 2, the limiting frame 3 is welded on the front side of the top of the first fixing frame 1, the first frame 4 is welded on the rear end of the first fixing frame 1, the second frame 41 is welded on the front side of the first fixing frame 1, the protecting mechanism 6 is arranged on the front side of the bottom of the seat cushion 2, the protecting mechanism 6 is provided with the protecting frame 5 for protecting the buttocks of people, the buttocks of people can be limited, the backrest mechanism 7 is arranged between the first fixing frame 1 and the first frame 4, people can lean the back against the backrest mechanism 7, a rear leg supporting mechanism 8 is arranged between the fixing frames 1, a front leg supporting mechanism 9 is arranged between the first fixing frames 1, and a clamping mechanism 10 is arranged on the seat cushion 2, so that the whole desk and chair can be folded and clamped.

As shown in fig. 3 and 4, the protection mechanism 6 includes a fixed plate 61, a rotator 62 and a first torsion spring 63, the fixed plate 61 is disposed on the left and right sides of the front side of the bottom of the seat cushion 2 through bolts, the rotator 62 is rotatably connected between the fixed plates 61, the fixed plate 61 can guide the rotator 62, the left and right sides of the rotator 62 are connected with the protection frame 5, the rotator 62 rotates to drive the protection frame 5 to rotate, and two first torsion springs 63 are disposed between the protection frame 5 and the fixed plates 61.

As shown in fig. 5 and 6, the backrest mechanism 7 includes a backrest chair 71, a first rotating shaft 72, a first gear 73 and a second torsion spring 74, the first rotating shaft 72 is rotatably connected between the rear portion of the first fixing frame 1 and the first frame 4, the backrest chair 71 is disposed between the first rotating shafts 72, the backrest chair 71 is used for resting, the first gear 73 is disposed inside the first rotating shaft 72, the second torsion spring 74 is disposed between the first rotating shaft 72 and the first fixing frame 1, and when the first rotating shaft 72 rotates, the second torsion spring 74 is twisted.

As shown in fig. 6 and 7, the rear leg supporting mechanism 8 includes a first supporting frame 81, a limiting rod 82, a second rotating shaft 83, a second gear 84 and a third gear 85, the rear portion of the first fixing frame 1 is rotatably connected with the second rotating shaft 83, the second rotating shaft 83 is located at the rear side of the first rotating shaft 72, the inner side of the second rotating shaft 83 is provided with the second gear 84, the second gear 84 is meshed with the adjacent first gear 73, the first gear 73 rotates to drive the second rotating shaft 83 to rotate through the second gear 84, the middle portion of the second rotating shaft 83 is provided with the third gear 85, the outer side of the second rotating shaft 83 is provided with the first supporting frame 81, the first supporting frame 81 is used for supporting on the ground, and the first supporting frame 81 is provided with the limiting rod 82 through a bolt.

As shown in fig. 8, the front leg supporting mechanism 9 includes a fixing shaft 91, a connecting frame 92, a rack frame 93, a fourth gear 94 and a second supporting frame 95, two fixing shafts 91 are welded on the rear portion of the outer side of the first fixing frame 1, the connecting frame 92 is connected between the two fixing shafts 91 in a sliding mode, the fixing shafts 91 can guide the connecting frame 92, the rack frame 93 is welded on the bottom of the connecting frame 92, the third gear 85 rotates to drive the rack frame 93 to move, the second supporting frame 95 is connected to the front side of the first fixing frame 1 in a rotating mode, the second supporting frame 95 can be supported on the ground, the fourth gear 94 is arranged on the outer side of the second supporting frame 95, and the rack frame 93 moves forward to drive the fourth gear 94 to rotate.

As shown in fig. 9 and 10, the clamping mechanism 10 includes an arc-shaped rail 101, a detent 102 and a tension spring 103, the arc-shaped rail 101 is welded on the left and right sides of the bottom of the seat cushion 2, the arc-shaped rail 101 is arc-shaped, the upper and lower sides of the arc-shaped rail 101 are provided with clamping grooves 104, the detent 102 is slidably connected to the lower portion of the second support frame 95, the inner side of the detent 102 can be matched with the clamping grooves 104, the tension spring 103 is arranged between the detent 102 and the second support frame 95, and the tension spring 103 can be deformed by pulling the detent 102.

When people need to use the desk and chair, the first support frame 81 and the second support frame 95 can be supported on the ground, and in an initial state, the clamping pin 102 is clamped in the clamping groove 104 below the first support frame, so that the position of the second support frame 95 can be limited, and the stability of the desk and chair is improved; then, a person can sit on the seat cushion 2, under the action of the gravity of the human body, the first supporting frame 81 and the second supporting frame 95 are tightly attached to the ground, the second rotating shaft 83 and the third gear 85 cannot rotate, meanwhile, the second gear 84 cannot rotate, the second gear 84 can clamp the first gear 73, and further the backrest chair 71 is limited, so that when the back of the person leans against the backrest chair 71, the backrest chair 71 cannot swing backwards, then the rotator 62 can be manually rotated, the rotator 62 rotates to drive the protection frame 5 to rotate upwards, the first torsion spring 63 is twisted, so that the upper part of the protection frame 5 rotates to the rear direction of the limiting frame 3, then the screw can be inserted into the upper part of the limiting frame 3, so that the screw is blocked at the front side of the upper part of the protection frame 5, then the protection frame 5 is released, under the action of the first torsion spring 63, the protection frame 5 swings forwards and is attached with the screw, the screw can limit the protective frame 5, and the protective frame 5 can protect the buttocks of people, so that the limiting effect is achieved; when the desk and chair is not used, the screw can be taken out, under the action of the first torsion spring 63, the protection frame 5 swings downwards to reset and can leave the seat cushion 2, then the bayonet lock 102 moves outwards and the bayonet slot 104 on the lower side is separated, the tension spring 103 is stretched, then the backrest chair 71 swings forwards, the backrest chair 71 drives the first rotating shaft 72 and the first gear 73 to rotate, the second torsion spring 74 is twisted, the first gear 73 rotates to drive the second gear 84 and the second rotating shaft 83 to rotate, the second rotating shaft 83 rotates to drive the third gear 85, the first support frame 81 and the limiting rod 82 to rotate, so that the first support frame 81 and the limiting rod 82 swing forwards, the third gear 85 rotates to drive the rack frame 93 and the engaging frame 92 to move forwards, the rack frame 93 moves forwards to drive the fourth gear 94 to rotate, the fourth gear 94 rotates to drive the second support frame 95 to swing backwards to retract, the second support frame 95 swings backwards to drive the bayonet lock 102 and the tension spring 103 to swing backwards, when the bayonet lock 102 swings to be in contact with the clamping groove 104 on the upper side, the bayonet lock 102 is driven to move inwards to reset and clamp into the clamping groove 104 on the upper side under the action of the tension spring 103, so that the position of the second support frame 95 can be limited, and the backrest chair 71 can be prevented from being automatically opened in a natural state; when people need to use the chair, the bayonet lock 102 can be moved outwards again to be separated from the bayonet groove 104 on the upper side, the tension spring 103 is stretched, then under the action of the second torsion spring 74, the first rotating shaft 72 and the first gear 73 are driven to rotate and reset, the first gear 73 rotates and resets and drives the second rotating shaft 83 to rotate and reset through the second gear 84, the second rotating shaft 83 rotates and drives the third gear 85, the first support frame 81 and the limiting rod 82 to rotate and reset, so that the first support frame 81 and the limiting rod 82 rotate downwards to open, the rack frame 93 and the connecting frame 92 are driven by the third gear 85 to move backwards, the rack frame 93 moves backwards and drives the fourth gear 94 and the second support frame 95 to rotate and reset, so that the second support frame 95 is supported on the ground, the second support frame 95 rotates and resets, so that the bayonet lock 102 and the tension spring 103 swing and reset, under the action of the tension spring 103, so that bayonet 102 is inserted into bayonet slot 104 on the underside.

Example 2

On the basis of embodiment 1, as shown in fig. 1, fig. 2, fig. 11, fig. 12 and fig. 13, the guardrail armrest mechanism 11 is further included, which is capable of being placed by hands of people conveniently, the guardrail armrest mechanism 11 includes a second fixing frame 111, a rotating rod 112, a third frame 113, a sliding rail 114, a slider 115, a connecting iron sheet 116 and an armrest frame 117, the second fixing frame 111 is disposed on the left and right sides of the rear portion of the back chair 71 through bolts, the rotating rod 112 is disposed on the second fixing frame 111 through bolts, the rotating rod 112 can be driven by the back chair 71 through the second fixing frame 111 to rotate, the third frame 113 is disposed on the rear side of the top portion of the first fixing frame 1 through bolts, the third frame 113 is disposed on the front side of the fixing shaft 91, the sliding rail 114 is connected to the third frame 113, the sliding rail 115 is connected to the sliding rail 114, the sliding slider 115 can slide up and down on the sliding rail 114, the rotating rod 112 rotates to jack up the slider 115 upwards, the slider 115 is provided with the connecting iron sheet 116, the top of the connecting iron sheet 116 is provided with the armrest frame 117, and the armrest frame 117 is used for placing hands of people.

When the back rest chair 71 swings forwards and is folded, the second fixing frame 111 and the rotating rod 112 can be driven to swing downwards, so that the rotating rod 112 is separated from the slider 115, and the slider 115, the connecting iron sheet 116 and the armrest frame 117 move downwards under the action of gravity, so that the armrest frame 117 can be folded; when the back rest chair 71 swings and unfolds, the second fixing frame 111 and the rotating rod 112 can be driven to swing upwards, and when the rotating rod 112 contacts with the slider 115, the slider 115 is driven to move upwards, so that the connecting iron sheet 116 and the armrest frame 117 move upwards, and then people can place hands on the armrest frame 117.

As shown in fig. 1, 2, 14 and 15, the folding backrest chair further comprises a storage mechanism 12 for storing articles, the storage mechanism 12 comprises a storage frame 121, a closing plate 122, a first hinge 123, a second hinge 124 and a third torsion spring 125, the storage frame 121 is arranged at the rear part of the backrest chair 71 through bolts, the storage frame 121 is used for storing articles, the second hinge 124 is arranged at the left side and the right side of the rear part of the backrest chair 71 through bolts, the first hinge 123 is rotatably connected to the second hinge 124, the two third torsion springs 125 are arranged between the first hinge 123 and the second hinge 124, the closing plate 122 is arranged between the bottoms of the first hinges 123, and the closing plate 122 is used for covering the storage frame 121.

When people need to place objects, the closing plate 122 can be opened to drive the first hinge 123 to rotate, so that the third torsion spring 125 is twisted, then the objects are placed in the storage frame 121, and then the hands are released, and the first hinge 123 and the closing plate 122 are driven to rotate and reset under the action of the third torsion spring 125.

The embodiments described above are provided to enable persons skilled in the art to make or use the invention and that modifications or variations can be made to the embodiments described above by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of protection of the present invention is not limited by the embodiments described above but should be accorded the widest scope consistent with the innovative features set forth in the claims.

Claims (8)

1. The utility model provides a folded cascade has safeguard function's desk chair, including first mount (1), seatpad (2), spacing (3), first frame (4) and second frame (41), the seatpad (2) left and right sides all is provided with first mount (1), first mount (1) top front side all is provided with spacing (3), first mount (1) rear end all is provided with first frame (4), first mount (1) front side all is provided with second frame (41), its characterized in that: the seat cushion is characterized by further comprising a protection mechanism (6), a protection frame (5), a backrest mechanism (7), a front leg supporting mechanism (9) and a clamping mechanism (10), wherein the protection mechanism (6) is arranged on the front side of the bottom of the seat cushion (2), the protection frame (5) is arranged on the protection mechanism (6), the backrest mechanism (7) is arranged between the first fixing frame (1) and the first frame (4), the rear leg supporting mechanism (8) is arranged between the fixing frames (1), the front leg supporting mechanism (9) is arranged between the first fixing frames (1), and the clamping mechanism (10) is arranged on the seat cushion (2).

2. A foldable desk and chair with protection function as claimed in claim 1, wherein: protection machanism (6) all are provided with fixed plate (61) including fixed plate (61), rotating ware (62) and first torsion spring (63) about the left and right sides of seatpad (2) bottom front side, and the rotary type is connected with rotating ware (62) between fixed plate (61), and the rotating ware (62) left and right sides all is connected with protection frame (5), all is provided with two first torsion springs (63) between protection frame (5) and fixed plate (61).

3. A foldable desk and chair with protection function as claimed in claim 2, wherein: the backrest mechanism (7) comprises a backrest chair (71), a first rotating shaft (72), a first gear (73) and a second torsion spring (74), the first rotating shaft (72) is rotatably connected between the rear portion of the first fixing frame (1) and the first frame (4), the backrest chair (71) is arranged between the first rotating shafts (72), the first gear (73) is arranged on the inner side of each first rotating shaft (72), the second torsion spring (74) is arranged between each first rotating shaft (72) and the first fixing frame (1), and when the first rotating shafts (72) rotate.

4. A foldable desk and chair with protection function as claimed in claim 3, wherein: rear leg supporting mechanism (8) is including first support frame (81), gag lever post (82), second pivot (83), second gear (84) and third gear (85), first mount (1) rear portion all rotary type is connected with second pivot (83), second pivot (83) are located first pivot (72) rear side, second pivot (83) inboard all is provided with second gear (84), second gear (84) and adjacent first gear (73) meshing, second pivot (83) middle part all is provided with third gear (85), second pivot (83) outside all is provided with first support frame (81), all be provided with gag lever post (82) on first support frame (81).

5. A foldable desk and chair with protection function as claimed in claim 4, wherein: front leg supporting mechanism (9) all is provided with two fixed axles (91) including fixed axle (91), linking frame (92), rack (93), fourth gear (94) and second support frame (95) outside rear portion first mount (1) outside, and equal sliding connection has linking frame (92) between two fixed axles (91), links up and all is provided with rack (93) bottom frame (92), and the equal rotary type in first mount (1) front side is connected with second support frame (95), and second support frame (95) outside all is provided with fourth gear (94).

6. A foldable desk and chair with protection function as claimed in claim 5, wherein: the clamping mechanism (10) comprises an arc-shaped rail (101), clamping pins (102) and tension springs (103), the arc-shaped rail (101) is arranged on the left side and the right side of the bottom of the seat cushion (2), the clamping grooves (104) are formed in the upper side and the lower side of the arc-shaped rail (101), the clamping pins (102) are connected to the lower portion of the second support frame (95) in a sliding mode, and the tension springs (103) are arranged between the clamping pins (102) and the second support frame (95).

7. A foldable desk and chair with protection function as claimed in claim 6, wherein: the novel backrest chair is characterized by further comprising a guardrail handrail mechanism (11), the guardrail handrail mechanism (11) comprises a second fixing frame (111), a rotating rod (112), a third frame (113), a sliding rail (114), sliders (115), a connecting iron sheet (116) and a handrail frame (117), the second fixing frame (111) is arranged on the left side and the right side of the rear portion of the backrest chair (71), the rotating rod (112) is arranged on the second fixing frame (111), the third frame (113) is arranged on the rear side of the top of the first fixing frame (1), the third frame (113) is located on the front side of the fixed shaft (91), the sliding rail (114) is connected onto the third frame (113), the sliders (115) are connected onto the sliding rail (114) in a sliding mode, the connecting iron sheet (116) is arranged on the sliders (115), and the handrail frame (117) is arranged on the top of the connecting iron sheet (116).

8. The foldable desk and chair with protection function as claimed in claim 7, wherein: the folding backrest chair is characterized by further comprising a storage mechanism (12), the storage mechanism (12) comprises a storage frame (121), a closing plate (122), a first hinge (123), a second hinge (124) and third torsion springs (125), the storage frame (121) is arranged at the rear portion of the backrest chair (71), the second hinge (124) is arranged on the left side and the right side of the rear portion of the backrest chair (71), the first hinge (123) is connected to the second hinge (124) in an equal rotating mode, the two third torsion springs (125) are arranged between the first hinge (123) and the second hinge (124), and the closing plate (122) is arranged between the bottoms of the first hinge (123).

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