CN203195123U

CN203195123U - Multifunctional chair

Info

Publication number: CN203195123U
Application number: CN 201320166091
Authority: CN
Inventors: 陈浩; 嵇红亮; 高宝岩; 宣琳
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-04-03
Filing date: 2013-04-03
Publication date: 2013-09-18
Anticipated expiration: 2023-04-03

Abstract

The utility model discloses a multifunctional chair, and designs for solving the problem of single function of the existing similar products. The chair comprises a seat body and a tabulate backup plate, and is characterized in that the seat body is connected with the backup plate by at least two groups of strut members; the strut members are connected with the seat body in a detachable mode; the strut members are hinged with the backup plate, and the hinged parts are provided with fixers capable of angularly rotating; the backup plate and the strut members form a desk body with a support after being separated from the seat body, wherein the backup plate serves as the desk panel of the desk body, and the strut members serve as desk legs of the desk body. When in use, by adjusting the backup plate, an integrated desk and chair or back rest desk is formed, and by detaching and separating the backup plate, the strut members and the seat body, an independently-used desk body is formed by the backup plate and the strut members. The multifunctional chair disclosed by the utility model is simple in structure, convenient to use and operate, various in function, wide in application range, and applicable to office and learning sites and other sites, or structure improvement of similar products.

Description

Multifunction chair

Technical field

The utility model relates to a kind of chair, is a kind of multifunction chair.

Background technology

Chair is a kind of thing to sit on, and it generally comprises pedestal, backrest, and some also comprises handrail, and existing chair mostly function is comparatively single, only has the function of seat.For this reason, Granted publication CN2277220Y such as the Chinese patent literature publication, on April 1 1998 Granted publication day, the utility model name is called " easy folding table/chair ", and it mainly is made of the first hack lever, the second hack lever, bull stick, portable plate and soft cushion, wherein after the two hack levers intersection twisting, 4 of bottoms consist of feets, and end face sets up cushion and consists of folding seat, the second hack lever both sides bull stick that is hinged, the horizon bar combining movement plate on bull stick top, and locked by a spanner.Should middle folding seat can after it launches fully, form seat state, adjust the angle of portable plate, and can make folding seat have table function, or have backrest function, fold under also bull stick can being turned, become a simple seat, also fully folding convenient folding and unfolding.

Also have, Granted publication CN202588939U such as the Chinese patent literature publication, December 12 2012 Granted publication day, the utility model name is called " a kind of military rumble seat ", comprise leg assembly, cushion and back cushion, cushion is installed on the leg assembly, travel(l)ing rest for connection cushion and back cushion is installed on the cushion, travel(l)ing rest comprises rack body, portable plate one and portable plate two, upper end and the back cushion of rack body are rotationally connected, lower end and the cushion of rack body are rotationally connected, portable plate one and portable plate two all are positioned at rack body away from a side of cushion, and the upper end of portable plate one and the bottom surface of back cushion are rotationally connected, and the upper end of the lower end of portable plate one and portable plate two is rotationally connected, lower end and the rack body of portable plate two are rotationally connected, and are provided with torsion spring between portable plate one and the portable plate two.By adopting said structure, this military rumble seat has the function of square stool, chair and combined table and chair assembly.

Above two patent documentations, although disclose the chair with tables and chairs function, function is still less, applicable scope is also comparatively limited to, therefore have much room for improvement.

Summary of the invention

For overcoming above-mentioned deficiency, the purpose of this utility model is that a kind of multifunction chair that changes integrated tables and chairs, chair, private table body into is provided to this area, makes it solve the existing comparatively single technical problem of like product function.It is achieved by the following technical solution.

This multifunction chair comprises pedestal and backup plate, backup plate is tabular, its structural feature is that described pedestal connects described backup plate by support member, detachable is connected between described support member and the described pedestal, hinged between described support member and the described backup plate, and hinge point is provided with the angle rotary fixing device, and described backup plate, support member form with the table body that supports after breaking away from described pedestal, described backup plate is as the table of this body, and described support member is as the table leg of this body.In the said structure, by described angle rotary fixing device is set, so that backup plate can form table with respect to the rotation of table body, by being designed to detachable, described support member and pedestal be connected again, so that support member cooperates backup plate can independently form a body, this body can be used as the small-sized desk uses such as note computer desk, and is not only simple, and diverse in function.

According to said structure, the concrete scheme structure that the utility model adopts is: described pedestal is by the two groups of hinged described backup plate of symmetrically arranged support member both sides, support arm is hinged consists of by two joints for described support member, hinge point is provided with described angle rotary fixing device, a wherein joint support arm of described support member is connected with described pedestal detachable, and another joint support arm and described backup plate are hinged.Support arm is hinged consists of by two joints by support member is designed to, and when support member, backup plate separate rear formation note computer desk with pedestal, by regulating the hinge angles between the two joint support arms, can realize that the height of a body is regulated.

Described support arm with the structure that described pedestal detachable is connected is: described pedestal is provided with and the flexible positioning seat that cooperates of described support arm, and positioning seat is provided with the locking member of locking support arm.By flexible adjustable with being designed between support arm and the pedestal, thereby be convenient to regulate spacing between backup plate and the pedestal, so that the scope of application is wider.

Described angle rotary fixing device refers to limit counterrotating device between two hinged ends of described hinge point.For example, adopt following scheme.

Scheme one: a hinged end of described hinge point is provided with the bar consent of jointed shaft and circle distribution, the jointed shaft end is provided with screw thread, another hinged end is provided with and the hinge hole of described jointed shaft cooperation and the spacing hole corresponding with described bar consent, described jointed shaft passes described hinge hole and end thread coupling nut, be provided with the gag lever post plug in the described bar consent, gag lever post plug one end stretches out the hinged end at described bar consent place, and is connected by screw and draws cap.The principle of this scheme is: draw cap by pulling, make the gag lever post plug break away from spacing hole, remove spacingly between two hinged ends of hinge point, two hinged ends can rotate relatively; By promoting to draw cap, the gag lever post plug is placed in bar consent and the spacing hole simultaneously, at this moment, spacing between two hinged ends of hinge point, two hinged ends are relatively fixing.

Scheme two: a hinged end of described hinge point is provided with the protruding axle with cannelure, protruding shaft end is provided with spacing hole, another hinged end of hinge point is provided with and the axis hole of protruding axle cooperation and the bar consent corresponding with the spacing hole of protruding axle, described protruding axle is by arranging two semi-ring axle sleeves in described cannelure, and protruding axle, semi-ring axle sleeve be matched with in the axis hole, by bolt the semi-ring axle sleeve is fixed in the axis hole, namely forms the hinged of two hinged ends; Be provided with the gag lever post plug in spacing slip between the two in described bar consent, the spacing hole, gag lever post plug one end stretches out the hinged end at described bar consent place, and is connected by screw and draws cap.This scheme also can realize that the angle rotation identical with scheme one is fixing, but the articulated manner of this scheme is more easier than scheme one.

Scheme three: a hinged end side of described hinge point is provided with to push away turns round groove, pushes away to turn round to be provided with in the groove to push away and turns round, and turns round that groove aligns and turns round the limited mouth that is slidingly matched with pushing away with described pushing away when another hinged end side of hinge point is provided with and rotates.This scheme principle is: when limited mouth along with the rotation of hinge point with push away when turning round groove and aliging, push away by slip and turn round, make to push away to turn round to place simultaneously to push away and turn round in groove and the limited mouth, namely form spacingly between two hinged ends, can't relatively rotate; Push away when turning round when resetting, remove spacingly, can relatively rotate between two hinged ends.This scheme structure is comparatively simple, and it is comparatively convenient to operate.

When support member was fixed structure, the using method of this multifunction chair was: by rotating described backup plate, this multifunction chair can switch between integrated tables and chairs and chair; Separate by described support member is dismantled with described pedestal, and rotate described backup plate, described support member and described backup plate form with the table body that supports, and support member is as the table leg of this body, and backup plate is as the table of this body.

When support member adopts bascule, being support member, support arm is hinged when consisting of by two joints, the using method of this multifunction chair is: by rotating described backup plate, and regulate in the described support member hinge angle of two joint support arms, this multifunction chair can switch between integrated tables and chairs, chair, desk three; By described support member is separated with described pedestal dismounting, and rotate described backup plate, and the hinge angle of regulating two joint support arms in the described support member, described support member and described table form with the adjustable table body of bearing height, described backup plate is as the table of this body, and two joint support arms of described support member are as the table leg of this height adjusting.Can learn by above, when support member adopts bascule, not only be convenient to regulate, and form more use state, the scope of application is wider.

In above-mentioned using method, described pedestal bottom is provided with supporting leg, and the supporting leg that wherein is positioned at described backup plate one side is provided with the jack of pegging graft and cooperating with described support member lower end support arm.When this multifunction chair uses as integrated tables and chairs, the support member of described backup plate one side separates with described pedestal dismounting, and with two joint support arms in this support member relatively rotation to the support arm of lower end cooperates with described jack, with the stability of raising to the backup plate support.

In said structure, end, described extension is provided with the fixed bar that is movably hinged, the fixed bar end is provided with elbow bend, the support arm that inserts described jack in the described support member is provided with the fixing hole that cooperates with described fixed bar elbow bend, by this fixed bar, fix the stability that backup plate is supported to improve support member with forming trigonometric expression between support arm and the extension.

The utility model structure is comparatively simple, and it is comparatively convenient to use, and diverse in function is applied widely, and be fit to the places such as all kinds of offices, study and use, or the architecture advances of like product.

Description of drawings

Fig. 1 is the structural representation that the utility model uses as chair.

Fig. 2 is the structural representation that the utility model uses as integrated tables and chairs.

Fig. 3 is the isolated table of the utility model body structure schematic diagram, and backup plate has increased baffle plate among the figure.

Fig. 4 is the utility model as another visual angle structural representation that uses with integrated tables and chairs, has done A section among the figure, B section confines.

Fig. 5 is the A section structure for amplifying schematic diagram of Fig. 4.

Fig. 6 is the B section structure for amplifying schematic diagram of Fig. 4.

Fig. 7 is another visual angle structural representation of the isolated table of the utility model body.

Fig. 8 is the structural representation that drawer is set up in table body bottom among Fig. 7.

Fig. 9 is the structural representation that the slide fastener bag is set up in table body bottom among Fig. 7.

Figure 10 is that the utility model uses time bottom to set up the structural representation of rack as chair.

Figure 11 is that the utility model uses time bottom to set up the structural representation of drawer as chair.

Figure 12 is the structural representation that the utility model uses as the dais, and supporting leg adopts telescopic structure among the figure.

Figure 13 is the structural representation that the utility model uses as the multilayer table, and supporting leg adopts telescopic structure among the figure.

Figure 14 is scheme one structural representation of the angle rotary fixing device of the utility model hinge point, and hinge point is lock-out state among the figure.

Figure 15 is the status architecture schematic diagram that hinge point unlocks among Figure 14.

Figure 16 is scheme two structural representations of the angle rotary fixing device of the utility model hinge point, and hinge point is lock-out state among the figure.

Figure 17 is the status architecture schematic diagram that hinge point unlocks among Figure 16.

Figure 18 is scheme three structural representations of the angle rotary fixing device of the utility model hinge point, and hinge point is released state among the figure.

Figure 19 is the cross-sectional view of Figure 18.

Figure 20 is the status architecture schematic diagram of hinge point locking among Figure 18.

The name of sequence number is called among the figure: 1, pedestal, 2, backup plate, 201, baffle plate, 3, angle rotary fixing device, 4, support arm, 401, fixing hole, 5, supporting leg, 6, the extension, 601, jack, 602, fixed bar, 7, sleeve pipe, 8, alignment pin, 9, I-shaped bracket, 10, drawer, 11, the slide fastener bag, 12, rack, 13, nut, 14, jointed shaft, 15, spacing hole, 16, draw cap, 17, screw, 18, bar consent, 19, the gag lever post plug, 20, protruding axle, 21, axis hole, 22, the semi-ring axle sleeve, 23, push away and turn round, 24, push away and turn round groove, 25, limited mouth.

The specific embodiment

Now by reference to the accompanying drawings, the utility model is further described.

Shown in Fig. 1～6, this multifunction chair comprises that the pedestal 1 with supporting leg 5, two groups of symmetrically arranged support members, surfaces are the backup plate 2 on plane, two groups of support members connect respectively pedestal, backup plate both sides, mode by flexible location between support member and the pedestal forms detachable and is connected, be hinged between support member and the backup plate, and hinge point is provided with angle rotary fixing device 3.As shown in Figure 7, in order to improve the intensity of backup plate, support member and backup plate directly hinged replaceable be a first hinged I-shaped bracket 9 of support member, pass through the affixed backup plate of bolt by I-shaped bracket again.Support member, backup plate separate the rear independent table body with support that uses that forms with the pedestal dismounting, namely support member is as the table leg of this body, and backup plate is as the table of this body.

Therefore design this multifunctional chair period of the day from 11 p.m. to 1 a.m, only support member need to be designed to and can be used for supporting after pedestal separates, such supporting piece structure pattern is a lot, and the utility model has adopted fixed support member and has been movably hinged two kinds of formula support members.

Fixed support member (not drawing accompanying drawing), namely support member itself is unadjustable, when its with pedestal, when backup plate is connected, only rotate backup plate and can make this multifunction chair form integrated tables and chairs or chair; When support member, backup plate separate with pedestal, rotate backup plate and can form with the table body that supports, support member is unadjustable as the table leg of this body, and backup plate is as the table of this body, by the hinge point between support member and the backup plate, can regulate the angle of inclination of table.

Be movably hinged the formula support member, shown in Fig. 1～4, joint support arm 4 is hinged consists of by two for support member, wherein a joint support arm is connected with the pedestal detachable, another joint support arm and backup plate are hinged, when support member with pedestal, when backup plate is connected, by rotating backup plate and regulate hinge angles between the two joint support arms, this multifunction chair can form any one of integrated tables and chairs, chair, desk three; When support member, backup plate separate with pedestal, by rotating backup plate and regulating the hinge angle of two joint support arms in the support member, can form with the adjustable table body of bearing height, support member is as the table leg of this body, by the hinge angle of two joint support arms in the adjusting support member, but the height of desk with adjustable body, and backup plate is as the table of this body, by regulating the hinge angle of support member and backup plate, can regulate the angle of inclination of table.

In this multifunction chair, the concrete structure that support member is connected with the pedestal detachable is: the pedestal both sides are provided with positioning seat, as positioning seat be the collar or sleeve pipe 7(namely: have socket join structure all can), support member is provided with and the collar or the flexible supporting section that cooperates of sleeve pipe.By supporting section is stretched in the collar or the sleeve pipe, and by alignment pin 8 supporting section and pedestal position are fixed, namely finished being connected of support member and pedestal.By regulating alignment pin, the fixed position of telescopic section on pedestal, can realize the adjusting of support member and pedestal relative position.When needs separate support member with pedestal, only need unload alignment pin, supporting section can be extracted out in the collar or sleeve pipe, realize that support member separates with pedestal.

In this multifunction chair, the angle rotary fixing device of each hinge point refers to limit counterrotating device between two hinged ends of hinge point, as: adopt following three kinds of schemes:

Scheme one, shown in Figure 14,15, a hinged end of hinge point is provided with the bar consent 18 of jointed shaft 14 and circle distribution, the jointed shaft end is provided with screw thread, another hinged end is provided with and the hinge hole of jointed shaft cooperation and the spacing hole 15 corresponding with the bar consent, and jointed shaft passes hinge hole and end thread coupling nut 13, is provided with the gag lever post plug 19 of spacing slip in bar consent, spacing hole, the hinged end at gag lever post plug one end extension bar consent place, and connect by screw 17 and to draw cap 16.The principle of this scheme is: draw cap by pulling, make the gag lever post plug break away from spacing hole, remove spacingly between two hinged ends of hinge point, two hinged ends can rotate relatively; By promoting to draw cap, the gag lever post plug is placed in bar consent and the spacing hole simultaneously, at this moment, spacing between two hinged ends of hinge point, two hinged ends are relatively fixing.

Scheme two, shown in Figure 16,17, a hinged end of hinge point is provided with the protruding axle 20 with cannelure, protruding shaft end is provided with spacing hole 15, the axis hole 21 that another hinged end of hinge point is provided with and protruding axle cooperates and the bar consent 18 corresponding with the spacing hole of protruding axle, protruding axle be by arranging two semi-ring axle sleeves 22 in cannelure, and protruding axle, semi-ring axle sleeve are matched with in the axis hole, by bolt the semi-ring axle sleeve is fixed in the axis hole, namely forms the hinged of two hinged ends.Be provided with the gag lever post plug 19 in spacing slip between the two in bar consent, the spacing hole, the hinged end at gag lever post plug one end extension bar consent place, and connect by screw 17 and to draw cap 16.This scheme is that from the difference of such scheme one hinged mode is different, but the mode that rotation is fixed is identical.

Scheme three, shown in Figure 18～20, a hinged end side of hinge point is provided with to push away turns round groove 24, pushes away to turn round to be provided with in the groove to push away and turns round 23, turns round that groove aligns and turns round the limited mouth 25 that is slidingly matched with pushing away with above-mentioned pushing away when another hinged end side of hinge point is provided with and rotates.When limited mouth with push away when turning round groove and aliging, turn round between groove and the limited mouth by pushing away to turn round to slide into to push away, can realize that the angle of hinge point is fixed.The quantity of limited mouth determines the adjustable scope of hinge point angle, and namely limited mouth is more, and the angle fixed position of hinge point is more, and adjustable extent is wider.

Except the design of above-mentioned three kinds of angle rotary fixing devices, as long as purpose is in order to realize angle rotation adjusting, also can to adopt other angle rotary fixing device to substitute.

In conjunction with said structure, adopt the hinged example that constitutes of two joint support arms with support member, use of the present utility model and achieved function are explained as follows.

Function one: use as chair.As shown in Figure 1, when using as chair (or chaise longue), by rotating the hinge angle of two joint support arms in backup plate and the adjusting support member, can realize the adjusting of backup plate angle of inclination and height, by regulating the fixed position between support member and the pedestal, can regulate the spacing between backup plate and the pedestal.The user can pass through these two kinds of regulative modes, regulates the comfort level of chair.

Function two: use as integrated tables and chairs.As shown in Figure 2, when using as integrated tables and chairs, backup plate namely uses as table.By rotating the hinge angle of two joint support arms in backup plate and the adjusting support member, can regulate angle of inclination and the height of backup plate, by regulating the fixed position between support member and the pedestal, can regulate the spacing between backup plate and the pedestal.The user can pass through these two kinds of regulative modes, and the comfort of regulation integrated tables and chairs also can be regulated table, thereby forms the desktop of inclination, easy-to-read.

Based on function two, stability when using in order to improve integrated tables and chairs, as shown in Figure 4, the pedestal bottom is provided with supporting leg 5, the supporting leg bottom is provided with extension 6, and supporting leg and extension combination are L-shaped, and the extension is provided with jack 601, the end, extension is provided with the fixed bar 602 that is movably hinged, and the fixed bar end is provided with elbow bend.When this multifunction chair uses as integrated tables and chairs, the support member of backup plate one side separates with the pedestal dismounting, and with the extremely vertical state of the relative rotation of two joint support arms in this support member, the support arm that is positioned at the lower end inserts above-mentioned jack, on this support arm, also be provided with the fixing hole 401 that cooperates with above-mentioned fixed bar elbow bend, by fixed bar support arm and extension formation trigonometric expression are fixed, improved the stability that backup plate is supported with this.

Function three: support member, backup plate and after pedestal separates, form the independent table body that uses by support member, backup plate, support member is as the table leg of table body, and backup plate is as the table of table body, and the pedestal after the separation can use as chair separately.By rotating the hinge angle of two joint support arms in backup plate and the adjusting support member, can regulate angle of inclination and the height of backup plate, the user can pass through this mode, the comfort of regulating this body.This body also can be used as note computer desk and uses except can be used as general desk use.When using as note computer desk, set up baffle plate 201 in the backup plate front, can effectively prevent the notebook computer landing.

Function four: as shown in figure 13, integrated tables and chairs shown in the function two, also can do following use: the pedestal part of integrated tables and chairs is used as desktop, backup plate is used as another desktop, namely this multifunction chair has formed the function that possesses the multilayer desktop, for example: the pedestal seat surface is designed to can be used for writing behind the plane, and backup plate can be used for placing laptop.When using as this function, the supporting leg of pedestal can be designed to collapsible or scalable, thereby make things convenient for the adjusting of pedestal height, also described support member can be designed to scalable, thereby further facilitate the adjusting of backup plate height and angle.This device also can use in bed, can by adding footmuff at its table leg, reach the purpose of clean hygiene.In addition, as shown in figure 12, these integrated tables and chairs also can change the dais into and use.Regulate support arm, backup plate be positioned at directly over the base, regulate the collapsing length of support arm and pedestal bottom support leg, make it to reach different people to the instructions for use of table body.

Function of the present utility model is not limited to above-mentioned four kinds, as long as structure relies on above-mentioned backup plate, support member, pedestal three's conversion, form the structure that possesses other function, for example: as the drawing board with chair, as music easel etc., all belong within the scope disclosed in the utility model.

More convenient for the utility model is used, can also do the following improvement to the utility model.

One, shown in Fig. 8～11, all design storeroom in pedestal bottom and the backup plate back side, storeroom can adopt drawer 10 forms, slide fastener bag 11 forms or rack 12 forms.Thereby conveniently deposit some ordinary articles, increase its accommodation function.This type of storeroom also can be designed to the structure of detachable or scalability, the convenient use.

Two, set up hook etc. in pedestal bottom and the backup plate back side, make things convenient for suspended item; The backup plate front can be made the desktop that to put tea set, make things convenient for holding water cup etc.

Three, set up cushion at pedestal, improve the comfort level of using.

Four, can put into the Transparent frame photograph of illustration in the positive design of backup plate, like the background patterns that backup plate is set with the aspect user according to self.

The setting of above 26S Proteasome Structure and Function is intended to illustrate technological means of the present utility model, and unrestricted technical scope of the present utility model.Those skilled in the art do apparent improvement in conjunction with existing common practise to the utility model, all fall within the utility model technical scope.

Claims

1. multifunction chair, this chair comprises pedestal (1) and backup plate (2), backup plate is tabular, it is characterized in that described pedestal (1) connects described backup plate (2) by support member, detachable is connected between described support member and the described pedestal, hinged between described support member and the described backup plate, and hinge point is provided with angle rotary fixing device (3), described backup plate, support member form with the table body that supports after breaking away from described pedestal, described backup plate is as the table of this body, and described support member is as the table leg of this body.

2. described multifunction chair according to claim 1, it is characterized in that described pedestal (1) is by two groups of hinged described backup plates of symmetrically arranged support member (2) both sides, described support member is by the hinged formation of two joint support arms (4), hinge point is provided with described angle rotary fixing device (3), a wherein joint support arm of described support member is connected with described pedestal detachable, and another joint support arm and described backup plate are hinged.

3. described multifunction chair according to claim 2, it is characterized in that described support arm (4) with the structure that described pedestal (1) detachable is connected is: described pedestal is provided with and the flexible positioning seat that cooperates of described support arm, and positioning seat is provided with the locking member of locking support arm.

4. described multifunction chair according to claim 1 and 2 is characterized in that described angle rotary fixing device (3) refers to limit counterrotating device between two hinged ends of described hinge point.

5. described multifunction chair according to claim 4, the structure that it is characterized in that described angle rotary fixing device is: a hinged end of described hinge point is provided with the bar consent (18) of jointed shaft (14) and circle distribution, the jointed shaft end is provided with screw thread, another hinged end is provided with the hinge hole that cooperates with described jointed shaft, and the spacing hole (15) corresponding with described bar consent, described jointed shaft passes described hinge hole and end thread coupling nut (13), described bar consent, be provided with the gag lever post plug (19) in spacing slip between the two in the spacing hole, gag lever post plug one end stretches out the hinged end at described bar consent place, and is connected by screw and draws cap (16).

6. described multifunction chair according to claim 4, the structure that it is characterized in that described angle rotary fixing device is: a hinged end of described hinge point is provided with the protruding axle (20) with cannelure, protruding shaft end is provided with spacing hole (15), another hinged end of hinge point is provided with the axis hole (21) that cooperates with protruding axle, and the bar consent (18) corresponding with the spacing hole of protruding axle, described protruding axle is by arranging two semi-ring axle sleeves (22) in described cannelure, and with protruding axle, the semi-ring axle sleeve is matched with in the axis hole, by bolt the semi-ring axle sleeve is fixed in the axis hole, namely forms the hinged of two hinged ends; Be provided with the gag lever post plug (19) in spacing slip between the two in described bar consent, the spacing hole, gag lever post plug one end stretches out the hinged end at described bar consent place, and draws cap (16) by screw (17) connection.

7. described multifunction chair according to claim 4, the structure that it is characterized in that described angle rotary fixing device is: a hinged end side of described hinge point is provided with to push away turns round groove (24), push away to turn round to be provided with in the groove to push away and turn round (23), turn round that groove aligns and turn round the limited mouth (25) that is slidingly matched with pushing away with described pushing away when another hinged end side of hinge point is provided with and rotates.

8. described multifunction chair according to claim 1 is characterized in that described pedestal is provided with supporting leg, and described support member, supporting leg are stretching structure.

9. described multifunction chair according to claim 1, it is characterized in that described pedestal (1) bottom is provided with supporting leg (5), the supporting leg that wherein is positioned at described backup plate (2) one sides is provided with extension (6), and the extension is provided with the jack (601) of pegging graft and cooperating with described support member lower end support arm.

10. the using method of described multifunction chair according to claim 9, it is characterized in that end, described extension (6) is provided with the fixed bar (602) that is movably hinged, the fixed bar end is provided with elbow bend, the support arm (4) that inserts described jack in the described support member is provided with the fixing hole (401) that cooperates with described fixed bar elbow bend, by this fixed bar, fix forming trigonometric expression between support arm and the extension.