CN108814227A - A kind of plastic stool support frame - Google Patents

Abstract

The present invention provides a kind of plastic stool support frames, belong to utility field, including suspension plate and mounting plate, connecting column is provided in the middle part of the suspension plate, the mounting plate is connected to the suspension plate, and the connecting column passes through the mounting plate, and the mounting plate and connecting column are rotatablely connected, the bottom end of the connecting column is provided with the bottom tube being detachably connected with it, and the side of the bottom tube is provided with multiple barrier sheets.This support frame can be used to support connection plastic bench, and plastic bench is connected to below indoor ceiling, be able to ascend indoor effective usable floor area, offer convenience to life.

Description

A kind of plastic stool support frame

Technical field

The present invention relates to utility fields, in particular to a kind of plastic stool support frame.

Background technique

Stool is very common articles, and easy plastic bench is even more very common.Common plastic bench is by stool surface And stool leg is constituted, and is also had some strengthening parts, is generally an integral structure.It is provided with through-hole, in the middle part of stool surface with convenient Stool is taken.

The usable floor area of most families is smaller, and the interior space is all to need to maximally utilize, and more furniture is also all can It folds, is shrinkable, moveable.Some families can select more plastic bench to use, because of plastic bench small volume, hold Easily move.When not in use, although plastic bench can be stacked together, it is empty that it can still occupy certain ground Between.On the other hand, for the family for having child, plastic bench that is removable, easily toppling over also can constitute potential prestige to child The side of body.

Summary of the invention

The present invention provides a kind of plastic stool support frames, it is intended to solve the above problem in the prior art.

The invention is realized in this way：

A kind of plastic stool support frame, including suspension plate and mounting plate are provided with connecting column, the installation in the middle part of the suspension plate Plate is connected to the suspension plate, and the connecting column passes through the mounting plate, and the mounting plate and connecting column are rotatablely connected, the company The bottom end for connecing column is provided with the bottom tube being detachably connected with it, and the side of the bottom tube is provided with multiple barrier sheets.

Further, the suspension plate is in rectangular configuration, the rounded structure of mounting plate；It is provided in the suspension plate Multiple mounting holes, the mounting hole are located at the outside of the mounting plate.

Further, there are two positioning components for setting on the mounting plate, and two positioning components are about the connection Column is symmetrical；The positioning component includes pedestal, elastic slice and motion bar, and the motion bar includes push rod and support rod, the branch Strut is vertically connected at the push rod, and one end of the push rod forms support end, is articulated with the base in the middle part of the motion bar Seat；The elastic slice is arc-shaped, and the pedestal is fixed in one end of the elastic slice, and the other end of elastic slice offsets with the support end It connects；There is the first supporting surface and the second supporting surface, first supporting surface and the elastic slice abut against when institute on the support end It states support rod when support rod is abutted against in the state that tilts down, second supporting surface and the elastic slice and is parallel to the peace Loading board.

Further, casing is arranged in the middle part of the connecting column, the outside of the connecting column is additionally provided with tension spring, described The top of tension spring is connected to the suspension plate, and the bottom end of the tension spring and the top of described sleeve pipe connect；The barrier sheet is along institute The circumferentially-spaced distribution of bottom tube is stated, the end of the barrier sheet and the bottom tube are hinged, the top surface of the barrier sheet and the set It is connected between the bottom end of pipe by bracing wire.

Further, the edge of the mounting plate is provided with limiting tooth, and limited block, the limit are provided in the suspension plate Position block is provided with the limiting slot to match with the limiting tooth close to the side of the mounting plate.

Further, the edge of the mounting plate is circumferentially arranged multiple mounting grooves, in each described mounting groove It is provided with the limiting tooth, one end of the limiting tooth and the mounting plate are hinged, also connect between the limiting tooth and mounting plate It is connected to return spring.

Further, the mounting groove has 6-8, and there are two the limited block tools, and two limited blocks are about institute State connection column symmetry.

Further, the arc-shaped structure of the limiting tooth, the intrados of limiting tooth is towards the return spring.

Plastic stool support frame provided by the invention, this support frame can be used to support connection plastic bench, by plastic stool Son is connected to below indoor ceiling, is able to ascend indoor effective usable floor area, is offered convenience to life.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.

Fig. 1 is the elevational schematic view of plastic stool support frame provided in an embodiment of the present invention；

Fig. 2 is the schematic side view of plastic stool support frame provided in an embodiment of the present invention；

Fig. 3 is the schematic side view of connecting column in plastic stool support frame provided in an embodiment of the present invention, and barrier sheet is towards updip at this time Tiltedly；

Fig. 4 is the elevational schematic view of connecting column in plastic stool support frame provided in an embodiment of the present invention；

Fig. 5 is the schematic side view of connecting column in plastic stool support frame provided in an embodiment of the present invention, and barrier sheet court has a down dip at this time Tiltedly；

Fig. 6 is the structural schematic diagram of positioning component in plastic stool support frame provided in an embodiment of the present invention, and push rod tilts at this time；

Fig. 7 is the structural schematic diagram of positioning component in plastic stool support frame provided in an embodiment of the present invention, and push rod is horizontal at this time；

Fig. 8 is the structural schematic diagram of motion bar in plastic stool support frame provided in an embodiment of the present invention.

Appended drawing reference summarizes：Suspension plate 11, mounting plate 12, connecting column 13, mounting hole 14, bottom tube 15, barrier sheet 16, end plate 17, connector 18, attachment base 19, casing 20, tension spring 21, bracing wire 22, blocker ring 23, perforation 24, positioning component 26, pedestal 27, Elastic slice 28, motion bar 29, push rod 30, support rod 31, support end 32, the first supporting surface 33, the second supporting surface 34, blocking portion 35, Strip-shaped hole 36, mounting groove 37, limiting tooth 38, return spring 39, limited block 40, limiting slot 41.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

Please refer to Fig. 1-8.

A kind of plastic stool support frame is present embodiments provided, this support frame can be used to support connection plastic bench, will Plastic bench is connected to below indoor ceiling, is able to ascend indoor effective usable floor area, is offered convenience to life.

As shown in Figures 1 and 2, this plastic stool support frame includes suspension plate 11, and multiple installations are provided in suspension plate 11 Hole 14, the middle part of suspension plate 11 are provided with connecting column 13, and the bottom end of connecting column 13 is provided with the bottom tube 15 being detachably connected with it, The side of bottom tube 15 is provided with multiple barrier sheets 16.

As shown in Figure 3-Figure 5, for barrier sheet 16 along the circumferentially-spaced distribution of bottom tube 15, the bottom of bottom tube 15 has end plate 17, Through-hole is offered on end plate 17, the bottom end of connecting column 13 offers threaded hole；Bottom tube 15 is connected with connecting column 13 by connector 18 It connects, connector 18 passes through through-hole and is spirally connected with connecting column 13.

The middle part of suspension plate 11 is provided with attachment base 19, and the top of connecting column 13 is connected to attachment base 19；Connecting column 13 Middle part is arranged with casing 20, and the outside of connecting column 13 is additionally provided with tension spring 21, and the top of tension spring 21 is connected to attachment base 19, tension spring 21 bottom end is connect with the top of casing 20；The end of barrier sheet 16 and bottom tube 15 are hinged, the top surface of barrier sheet 16 and casing 20 Bottom end between be connected with bracing wire 22；The top of bottom tube 15 has the blocker ring 23 outwardly protruded.The bottom end of casing 20 is provided with The top of perforation 24, bracing wire 22 passes through perforation 24；The outer diameter of casing 20 is less than the internal diameter of bottom tube 15.

As shown in Figure 1 and Figure 6, suspension plate 11 is connected with mounting plate 12, and connecting column 13 passes through mounting plate 12；Mounting plate 12 Side far from suspension plate 11 is provided with multiple positioning components 26；Suspension plate 11 is in rectangular configuration, and mounting plate 12 is circular configuration, Mounting plate 12 and connecting column 13 are rotatablely connected, and mounting plate 12 is rotated relative to connecting column 13.Mounting hole 14 is located at described The outside of mounting plate 12.

Positioning component 26 includes pedestal 27, elastic slice 28 and motion bar 29, and motion bar 29 includes push rod 30 and support rod 31, branch Strut 31 is vertically connected at push rod 30, and one end of push rod 30 forms support end 32, and the middle part of motion bar 29 is articulated with pedestal 27；Bullet Piece 28 is arc-shaped, and pedestal 27 is fixed in one end of elastic slice 28, and the other end and the support end 32 of elastic slice 28 abut against；On support end 32 With the first supporting surface 33 and the second supporting surface 34, support rod 31 is in and tilts down when the first supporting surface 33 is abutted against with elastic slice 28 State, support rod 31 is parallel to mounting plate 12 when the second supporting surface 34 is abutted against with elastic slice 28.Pedestal 27 is close to the portion of push rod 30 Position forms blocking portion 35, and push rod 30 is abutted against with blocking portion 35 when the second supporting surface 34 is abutted against with elastic slice 28.

As shown in Figure 1, two positioning components 26 are about the symmetrical setting of connecting column 13 there are two positioning components 26.Installation Two strip-shaped holes 36 for connecting positioning component 26 are provided on plate 12, the length direction of two strip-shaped holes 36 is consistent.

The edge of mounting plate 12 is provided with limiting tooth 38, limited block 40 is provided in suspension plate, limited block 40 is close to installation The side of plate 12 is provided with the limiting slot 41 to match with limiting tooth 38, and the edge of mounting plate 12 is circumferentially arranged multiple installations Slot 37 is provided with limiting tooth 38 in each mounting groove 37, and one end of limiting tooth 38 and mounting plate 12 are hinged, limiting tooth 38 with Return spring 39 is also connected between mounting plate 12, mounting groove 37 has 6-8, and there are two the tools of limited block 40, two limited blocks 40 About connection column symmetry, the arc-shaped structure of limiting tooth 38, the intrados of limiting tooth 38 is towards return spring 39.

Suspension plate 11 is one piece of rectangle or circular plank, is for the plastic stool support frame to be installed under ceiling Side.There is the flange being turned over downwards at the edge of suspension plate 11, its aesthetics and intensity are able to ascend by flange.It is hanging Mounting hole 14 is set on plate 11, suspension plate 11 is enable to be ceiling mounted.

Connecting column 13 is set in the middle part of suspension plate 11, and connecting column 13 is inserted into the centre bore in the middle part of plastic bench, passes through company It connects column 13 and connects plastic bench.Bottom tube 15 is arranged in 13 bottom of connecting column, and bottom tube 15 is detachably connected with it, can be according to practical feelings Condition dismantles bottom tube 15.Barrier sheet 16 is provided in bottom tube 15, after plastic bench is connected to connecting column 13, plastic bench Centre bore is located at the top of barrier sheet 16, and barrier sheet 16 plays barrier effect to it from the lower section of plastic bench, makes plastic bench It can be fixed in suspension plate 11.

As it can be seen that the support frame by this structure can connect plastic bench on the ceiling, stool is made to prevent take up room The ground space of interior preciousness vacates bigger effective available space to interior, and child will not be made to touch, The risk tripped when child runs indoors can be reduced.

Attachment base 19 is arranged in the middle part of suspension plate 11, and attachment base 19 can be an integral structure with suspension plate 11, can also be with It is split type structure.The setting of attachment base 19 enables connecting column 13 to be advantageously connected in suspension plate 11, and makes spring Equal other components are easy connection.

The casing 20 being arranged in the middle part of connecting column 13 can move up and down on connecting column 13, and casing 20 is solid by tension spring 21 It is fixed, a certain position on connecting column 13 can be stablized in the pulling force effect setting of casing 20 of tension spring 21, when casing 20 is by downward It can be moved down after active force.And so that tension spring 21 is stretched, tension spring 21 is made to be capable of providing the effect bigger to casing 20 Power.

Barrier sheet 16 and bottom tube 15 are hingedly arranged, and bracing wire 22 is arranged between barrier sheet 16 and casing 20, so that resistance Baffle 16 can be overturn with respect to bottom tube 15, make user when connecting plastic bench, be directly inserted into the centre bore of plastic bench and connected Column 13 is connect, is provided a great convenience to the installation of plastic bench.

Barrier sheet 16 have it is multiple, and along the circumferentially-spaced distribution of bottom tube 15, when barrier sheet 16 is flipped up or is turned over downwards After turning, the diameter that the periphery of multiple barrier sheets 16 is formed is smaller, and the centre bore of plastic bench is passed through.When barrier sheet 16 When centrally located, that is, when being generally horizontal, with biggish radial dimension, so that the centre bore of plastic bench It can not pass through, barrier sheet 16 is enable to play a supporting role plastic bench.

As shown in figure 3, between barrier sheet 16 and casing 20 have bracing wire 22, by the effect of tension spring 21 and bracing wire 22 so that Barrier sheet 16 is in acclivitous state.When connecting plastic bench, user holds the stool leg of plastic bench, pushes up Dynamic plastic bench, the centre bore of plastic bench pass through the bottom of connecting column 13, push up barrier sheet 16, barrier sheet 16 is pushed To top, and barrier sheet 16 is made to pass through centre bore.After the hand of user unclamps plastic bench, plastic bench is under gravity It falls downwards, and drives barrier sheet 16 to open downwards, but since plastic bench itself is lighter, the pulling force for being limited by tension spring 21 is made With, plastic bench can not fully open downwards barrier sheet 16, and so that barrier sheet 16 is fitted in the lower section of plastic bench, and Play the role of support to plastic bench to stop, plastic bench is enable steadily to connect on the support frame.

When needing to take down plastic bench, user holds stool leg in lower section, plastic bench is firmly pulled downward on, in user Pulling force under the action of, plastic bench gives barrier sheet 16 downward active force, downwardly turns over barrier sheet 16, passes through bracing wire 22 Casing 20 is pulled, casing 20 is moved down, and stretches tension spring 21.Barrier sheet 16 downwardly turns over, so that in plastic bench Heart hole can finally pass through barrier sheet 16, and plastic bench is enable to take off from support frame.After plastic bench is taken off, Each member resets such as barrier sheet 16, casing 20 and tension spring 21.

The top of bottom tube 15 is provided with blocker ring 23, and blocker ring 23 has biggish diameter, and is greater than the outer diameter of bottom tube 15, This set overturn barrier sheet 16 will not to vertical state when being flipped up, it is made to be in heeling condition always；Make to mould Stool is expected when pushing up barrier sheet 16, and barrier sheet 16 will not be to vertical state, can be always in the work of gravity It is downwardly turned over automatically with lower.

In the bottom end of casing 20, setting perforation 24, enables the end of bracing wire 22 to be steadily connected to the end of casing 20. Connection ring is set in the top surface of barrier sheet 16, the bottom end of bracing wire 22 is connected in connection ring.

The structure of bottom end with end plate 17 for top end opening of bottom tube 15, so that after bottom tube 15 is connected on connecting column 13 It will not move up and down.Through-hole is set in the middle part of end plate 17, connector 18 is passed through, by the connection of connector 18, makes bottom Pipe 15 can steadily be connected to the bottom of connecting column 13, and can easily dismantle.

Mounting plate 12 is set in suspension plate 11, positioning component 26 is set on mounting plate 12, enables positioning component 26 Play the role of positioning support from the side of plastic bench, plastic bench is more stably connected on the support frame.

Mounting plate 12 is rounded, and middle part has hole, and connecting column 13 passes through mounting plate 12.Mounting plate 12 is rotationally connected to On connecting column 13 or on attachment base 19, mounting plate 12 is enable to rotate relative to suspension plate 11, so that after plastic bench installation It can be rotated around vertical axis.Indoors in use, such be arranged so that plastic bench is during installation or after installation Facilitate adjusting angle, enable plastic bench installation and to remove work more convenient.Also, it is such to be arranged so that the branch Support has certain entertainment, brings entertaining to user's daily life.In addition, it also has certain ornamental value, shows Property, it can be used in shop or exhibition room, plastic bench or other articles are mounted on to the lower section of support frame, pass through rotational installation Plate 12 can be such that plastic bench or other articles rotates, to be preferably shown to article, it is comprehensively right to facilitate viewer It is understood.

There is the surrounding edge of certain altitude in the lower section of the seat plate of plastic bench, surrounding edge strengthens the intensity of plastic bench.It is logical Surrounding edge can be supported by crossing positioning component 26, and plastic bench is enable more stably to connect on the support frame.

Pedestal 27 is the foundation structure of positioning component 26, can be hollow, is also possible to solid.Elastic slice 28 and work Lever 29 is connected on pedestal 27.Motion bar 29 is mobilizable rod-like structure part, substantially l-shaped structure, in its corner With the support end 32 extended downwardly, can be cooperated with elastic slice 28 by support end 32.Push rod 30 and support rod 31 are basic Perpendicular, push rod 30 has the length greater than support rod 31.Support end 32 be it is abnormally-structured, be mainly used to prop up motion bar 29 Support, and play positioning action.There are two important faces, i.e. the first supporting surface 33 and the second supporting surface 34 for the tool of support end 32.The One supporting surface 33 and the second supporting surface 34 are mutually inclined, with circular arc or tiltedly between the first supporting surface 33 and the second supporting surface 34 Face transition.

The main portions of elastic slice 28 are arcuate structure, can generate elastic force.Its position for being used to connect makes in plane Its lower section that can be steadily connected to pedestal 27.

As shown in fig. 6, motion bar 29 is connected to the side of pedestal 27, elastic slice 28 is connected to the bottom of pedestal 27.Elastic slice 28 Arc part extend to motion bar 29 support end 32 lower section.In the initial state, the first supporting surface 33 is fitted in elastic slice 28 top, elastic slice 28 have upward elastic force to motion bar 29, motion bar 29 are stablized in this state.It pushes away at this time Bar 30 and support rod 31 are in heeling condition, and the extension of push rod 30 is longer, so that plastic bench is in the process pushed up In can push push rod 30.

When connecting plastic bench, plastic bench is pushed up, and touches push rod 30, and push rod 30 is pushed up, is made Motion bar 29 is begun turning, the first supporting surface 33 and the elastic slice 28 of support end 32 are detached from, during overturning elastic slice 28 to Under be extruded, and the second supporting surface 34 is finally enable to be moved to the top of elastic slice 28, enables the second supporting surface 34 and elastic slice 28 top fitting.Push rod 30 is substantially at vertical state at this time, and support rod 31 is substantially at horizontal state, and support rod 31 end can extend to the lower section of the surrounding edge of plastic bench, and play a supporting role to plastic bench.By the bullet of elastic slice 28 Power effect, motion bar 29 can be stablized in the position.

When removing plastic bench downwards, user holds the stool leg of plastic bench, pulls downward on plastic bench, makes plastic stool The surrounding edge of son applies downward active force to support rod 31 so that motion bar 29 is begun turning downwards, make the second supporting surface 34 with Elastic slice 28 separates, and is bonded the first supporting surface 33 with elastic slice 28, overturns push rod 30 and support rod 31 to skewed State.After plastic bench and positioning component 26 are detached from, motion bar 29 can be stablized in this state.

Pedestal 27 close to the position of push rod 30 have blocking portion 35, enable blocking portion 35 to push rod 30 play blocking and The effect of support enables motion bar 29 to preferably keep stabilization.

By the setting of positioning component 26, further supporting role can be played to plastic bench, so that plastic bench It can more stably connect on the support frame.

In the present embodiment, positioning component 26 is set as two, and two positioning components 26 cooperate, from plastic bench Two sides play a supporting role to plastic bench, keep support force more preferable, and more stable.What is be arranged on mounting plate 12 is fixed for installing The hole of hyte part 26 is strip-shaped hole 36, enables positioning component 26 to be installed in different positions, so that two positioning components The distance between 26 is adjustable, and user can adjust the distance between positioning component 26 according to the different situations of plastic bench, with more Facilitate installation plastic bench.

Limiting tooth 38, the limit that setting is used to match with limiting tooth 38 in suspension plate 11 are additionally provided on mounting plate 12 Block 40, so that mounting plate 12 can be defined in place in the course of rotation, so that user be not rotatablely installed Each component is able to maintain stabilization when plate 12.

As shown in Figure 1, being provided with multiple mounting grooves 37, setting in each mounting groove 37 at the edge of circular mounting plate 12 There is limiting tooth 38, one end of limiting tooth 38 and mounting plate 12 are hinged, and the other end is in free state.It is also set up in mounting groove 37 Have a return spring 39, return spring 39 connects the middle part of limiting tooth 38, return spring 39 limiting tooth 38 can be played pulling force effect and Certain thrust.

There are two the close mounting plates 12 that limited block 40, limited block 40 are arranged for setting in suspension plate 11.Limited block 40 Limiting slot 41 is arranged in middle part, and limiting slot 41 can be matched with limiting tooth 38.

During being rotatablely installed plate 12, after limiting tooth 38 is bonded with limited block 40, mounting plate 12 is continued to rotate, Limiting tooth 38 can be made to fall into limiting slot 41, by the mutual cooperation of limiting tooth 38 and limiting slot 41, enable mounting plate 12 It is enough to stablize in the position.Mounting plate 12 is continued to rotate, return spring 39 can be made to stretch or compress, mounting plate 12 is made to be detached from the position It sets.

As can be seen that the plastic stool support frame by this structure can make plastic bench be steadily connected to ceiling On, to vacate more useful spaces to interior, offer convenience to life.

The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.

Claims (8)

1. a kind of plastic stool support frame, which is characterized in that including suspension plate and mounting plate, the company of being provided in the middle part of the suspension plate Column is connect, the mounting plate is connected to the suspension plate, and the connecting column passes through the mounting plate, and the mounting plate and connecting column turn Dynamic connection, the bottom end of the connecting column are provided with the bottom tube being detachably connected with it, and the side of the bottom tube is provided with multiple resistances Baffle.

2. plastic stool support frame according to claim 1, which is characterized in that the suspension plate is in rectangular configuration, the peace The rounded structure of loading board；Multiple mounting holes are provided in the suspension plate, the mounting hole is located at the outside of the mounting plate.

3. plastic stool support frame according to claim 1, which is characterized in that there are two positioning groups for setting on the mounting plate Part, two positioning components are symmetrical about the connecting column；The positioning component includes pedestal, elastic slice and motion bar, institute Stating motion bar includes push rod and support rod, and the support rod is vertically connected at the push rod, and one end of the push rod forms support It holds, is articulated with the pedestal in the middle part of the motion bar；The elastic slice is arc-shaped, and the base is fixed in one end of the elastic slice Seat, the other end of elastic slice are abutted against with the support end；There is the first supporting surface and the second supporting surface on the support end, it is described First supporting surface and the elastic slice when abutting against the support rod in the state that tilts down, second supporting surface and the elastic slice The support rod is parallel to the mounting plate when abutting against.

4. plastic stool support frame according to claim 3, which is characterized in that it is arranged with casing in the middle part of the connecting column, The outside of the connecting column is additionally provided with tension spring, and the top of the tension spring is connected to the suspension plate, the bottom end of the tension spring with The top of described sleeve pipe connects；The barrier sheet along the bottom tube circumferentially-spaced distribution, the end of the barrier sheet with it is described Bottom tube is hinged, is connected between the top surface of the barrier sheet and the bottom end of described sleeve pipe by bracing wire.

5. plastic stool support frame according to claim 3, which is characterized in that the edge of the mounting plate is provided with limit Tooth is provided with limited block in the suspension plate, and the limited block is provided with and the limiting tooth close to the side of the mounting plate The limiting slot to match.

6. plastic stool support frame according to claim 5, which is characterized in that the edge of the mounting plate is circumferentially arranged to be had Multiple mounting grooves are provided with the limiting tooth, one end of the limiting tooth and the mounting plate in each described mounting groove Hingedly, return spring is also connected between the limiting tooth and mounting plate.

7. plastic stool support frame according to claim 6, which is characterized in that the mounting groove has 6-8, the limit There are two block tools, and two limited blocks are about the connection column symmetry.

8. plastic stool support frame according to claim 6, which is characterized in that the arc-shaped structure of limiting tooth, limiting tooth Intrados towards the return spring.