CN205053381U

CN205053381U - Folding beach chair

Info

Publication number: CN205053381U
Application number: CN201520813715.9U
Authority: CN
Inventors: 庞明方
Original assignee: Taicang Chezhongbao Leisure Products Co Ltd
Current assignee: Taicang Chezhongbao Leisure Products Co Ltd
Priority date: 2015-10-21
Filing date: 2015-10-21
Publication date: 2016-03-02
Anticipated expiration: 2025-10-21

Abstract

The utility model provides a folding beach chair, including the waist circle, four legs, curved bar in two, pole before two, two back poles, well chair cloth cover, preceding chair cloth cover and back chair cloth cover, the waist circle is that a nylon circle has the circle of four partitions to perforate, the leg is by the bent pipe, middle part rivet nut, step bolt, top rivet nut, the bolt is twisted to the hand and the podotheca is formed by connecting, four legs are connected to in the waist circle, well curved bar is by the S -shaped pipe, two rivet nuts, two cylindricality connecting pin and two bolted connection form, the curved bar is positioned the top of four legs in two, preceding pole is by the rectangle head tube, the vexed stopper of rectangle connecting pin and rectangle is formed by connecting, back pole is managed after by the rectangle, the vexed stopper of rectangle connecting pin and rectangle is formed by connecting, curved bar in two is connected to well chair cloth cover, pole before two is connected to preceding chair cloth cover, back chair cloth cover is connected in two back poles, the pole is connected with two well curved bar front ends before two, two back poles are connected with two well curved bar rear ends.

Description

Folding beach chair

Technical field

The utility model relates to one and is convenient to folding and unfolding, portable chaise longue, and particularly one facilitates sandy beach to play use, is convenient for carrying, opens and draws in folding beach chair easily.

Background technology

At present searching conveniently can launch and draws in, portable folding beach chair being difficult on the market.

Utility model content

The purpose of this utility model will provide a kind of and be convenient for carrying, is conducive to the folding beach chair that carries out playing at sandy beach.The purpose of this utility model is achieved in that folding beach chair, comprise curved bar in Yao Quan, four foot levers, two, two front bars, two rear bars, middle chair cloth cover, front chair cloth cover and rear chair cloth cover, it is characterized in that: waist circle is that the inner side of a nylon circle has four arc-shaped recess, a circle perforation is respectively had in four arc-shaped recess of waist circle, waist circle circle perforation outside with counterbore, when the arc-shaped recess of waist circle struts with foot lever and time folding wavy bend corresponding, foot lever comprises swan-neck, middle part blind nut, shoulder bolt, top blind nut, hand twists bolt and footmuff, swan-neck is formed by metal circular tube bending ram, in the middle of swan-neck, corrugate bends, the top of swan-neck curves inwardly, the outside that in the middle of swan-neck, corrugate is bending is with circular hole, swan-neck curves inwardly the outside above locating with circular hole, in circular hole in the middle of swan-neck, riveted joint has middle part blind nut, in the circular hole on swan-neck top, riveted joint has top blind nut, swan-neck bottom socket footmuff, four foot levers are penetrated in the nylon circle of waist circle, four shoulder bolts are penetrated in four circle perforation of waist circle, and twist in the middle part blind nut received on four foot levers, and tighten, allow four foot levers rotate with Yao Quan be connected, four hands being twisted bolt is screwed in the top blind nut of four foot levers, in two, curved bar respectively comprises S shape pipe, two blind nut, two cylindricality connection plugs and two bolts, S shape pipe is bent into the S shape of lying down by rectangular metal pipe, the bottom surface of S shape pipe front and rear respectively has a circular hole, arrange about two S shape pipes, penetrate into after in the pipe box on middle chair cloth cover both sides until two S shape pipes, four blind nut are penetrated from bottom to top the pipe box on middle chair cloth cover both sides, to penetrate into again in the circular hole of two S shape pipe front and rears and to rivet, by the bottom surface of four blind nut riveted joints with two S shape pipe front and rears, middle chair cloth cover is fixedly connected with two S shape pipes simultaneously, cylindricality connection plug is the connection plug of the vertical cylindricality with nylon injection-molding, there is a gap side of cylindricality connection plug bottom, the opening position of cylindricality connection plug has a circular hole vertical with gap, the axis of cylindricality connection plug has a through hole, the through hole of the axis of cylindricality connection plug is communicated with the gap of cylindricality connection plug bottom, penetrate in the through hole of four cylindricality connection plug axis with four bolts, and twist and to receive in two in the blind nut of curved bar front and rear bottom surface four, the bottom surface of four cylindricality connection plugs and two S shape pipe front and rears is fixed, four cylindricality connection plugs of two S shape pipe front and rears will be connected to, penetrate in the pore at four foot lever swan-neck tops from the top down, and twist bolt with four hands and be screwed in the circular hole of cylindricality connection plug opening position, curved bar in two is allowed to be positioned the top of four foot levers, front bar is managed by before rectangle, rectangle connection plug and the vexed plug of rectangle are formed, before rectangle, pipe is made up of rectangular metal pipe, rectangle connection plug is the blank of rectangular aluminium type, rectangle connection plug to be filled in before rectangle in the pore of pipe rear end, and it is fixing by self-plugging rivet riveted joint, the vexed plug of rectangle is injection molded by plastics, the front end of pipe before rectangle filled in by the vexed plug of rectangle, rear bar is managed by after rectangle, rectangle connection plug and the vexed plug of rectangle are formed, after rectangle, pipe is made up of rectangular metal pipe, rectangle connection plug to be filled in after rectangle in the pore of pipe front end, and it is fixing by self-plugging rivet riveted joint, the rear end of the vexed gag of rectangle pipe after rectangle, middle chair cloth cover is made by nylon cloth to form, there is the pipe box corresponding with middle curved bar on the both sides of middle chair cloth cover, the pipe box on middle chair cloth cover both sides is applicable to wear curved bar in two, front chair cloth cover is made by nylon cloth to form, there is the bagging corresponding with front bar on the both sides of front chair cloth cover, two front bars are penetrated from back to front respectively in the bagging on front chair cloth cover both sides, rear chair cloth cover is made by nylon cloth to form, there is the bagging corresponding with rear bar on the both sides of rear chair cloth cover, two rear bars are penetrated in the bagging on rear chair cloth cover both sides from front to back respectively, two front bars are penetrated in the pore of curved bar front end in two from front to back respectively, and be inconjunction with the front that front chair cloth cover is connected to middle chair cloth cover, two rear bars are penetrated in the pore of curved bar rear end in two from back to front respectively, and is inconjunction with the rear that rear chair cloth cover is connected to middle chair cloth cover.

The beneficial effects of the utility model are: the outside riveted joint blind nut in the middle of four foot levers, and penetrate four circle perforation of waist circle with four shoulder bolts after, be screwed in the middle riveted joint blind nut of four foot levers again, such connected mode is better than connecting with self-plugging rivet, the outside riveted joint blind nut on four foot lever tops, and twist bolt with four hands and twist in the riveted joint blind nut receiving four foot lever tops, then twisting receives in the circular hole of insertion four foot lever upper end pore center pillar shape connection plug, and the kind validity of connected mode and stability are all due to original ∝ shape jump ring like this; The utility model folds beach chair simple structure, folding and unfolding is flexible, easy to carry.

Accompanying drawing explanation

Fig. 1 is the utility model structure and appearance schematic diagram;

Fig. 2 is the structural representation of the utility model Yao Quan and four foot levers;

Fig. 3 is the organigram of the utility model cylindricality connection plug;

Fig. 4 is gathering figure schematic diagram of the present utility model;

In figure: 1---waist circle, 2---foot lever, 3---middle curved bar, 4---front bar, 5---rear bar, 6---middle chair cloth cover, 7---front chair cloth cover, 8---rear chair cloth cover.

Detailed description of the invention

According to Fig. 1, Fig. 2 and Fig. 3, described folding beach chair comprises: waist circle 1, foot lever 2, middle curved bar 3, front bar 4, rear bar 5, middle chair cloth cover 6, front chair cloth cover 7 and rear chair cloth cover 8;

Described waist circle 1 is by the circle part of nylon injection-molding, there are four arc-shaped recess the inner side of described waist circle 1, a circle perforation is respectively had in the middle of four arc-shaped recess of described waist circle 1, the outside of described waist circle 1 circle perforation is connected with counterbore, four circles of described waist circle 1 circle bore a hole into quartering distribution, the arc-shaped recess of described waist circle 1 is positioned at forming V-shape on circle perforation, the arc-shaped recess of described waist circle 1 is positioned under circle perforation and becomes inverted V-arrangement, the V-arrangement of the arc-shaped recess of described waist circle and inverted V-arrangement, wavy bending corresponding when strutting with foot lever and time folding, the counterbore in described waist circle 1 four circle perforation outside is corresponding with the head of described shoulder bolt.

Described foot lever 2 comprises swan-neck, middle part blind nut, shoulder bolt, top blind nut, hand twists bolt and footmuff, described swan-neck is that Φ 22.2mm metal circular tube bending ram forms by diameter, the middle corrugate of described swan-neck bends, the top of described swan-neck curves inwardly, curving inwardly of described swan-neck, the swan-neck described in four to coordinate with described waist circle 1 launch time, described swan-neck to curve inwardly with ground be vertical shape, the outside that in the middle of described swan-neck, corrugate is bending is with circular hole, in the middle of described swan-neck, the aperture of outer mother rib lateral rotundum is Φ 7mm, described swan-neck curves inwardly the outside above locating with circular hole, the aperture of described swan-neck upper outer circular hole is Φ 7mm, in circular hole in the middle of described swan-neck, riveted joint has described middle part blind nut, described middle part blind nut is the blind nut of M5, in the circular hole on described swan-neck top, riveted joint has described top blind nut, described top blind nut is the blind nut of M5, footmuff described in the socket of described swan-neck bottom, described footmuff is plastic cement oblique angle footmuff, foot lever 2 described in four is penetrated in the nylon circle of described waist circle 1, described shoulder bolt is the shoulder bolt of M5 × 11, the screw thread place of described shoulder bolt with resistance to fall glue, shoulder bolt described in four is penetrated in four circle perforation of described waist circle 1, and twist receive in the middle part blind nut of foot lever 1 described in four, and tighten, allow the foot lever 2 described in four rotate with described waist circle be connected, it is that the hand of M5 × 20 twists bolt that described hand twists bolt, hand described in four is twisted bolt be screwed in the top blind nut of foot lever 2 described in four.

Described middle curved bar 3 comprises S shape pipe, two blind nut, two cylindricality connection plugs and two bolts, described S shape pipe is bent into the S shape of lying down by rectangular metal pipe, the bottom surface punching at described S shape pipe rear portion has an oblique counterbore, the oblique counterbore in described S shape pipe rear portion is corresponding with curving inwardly of described swan-neck top when launching, the bottom surface of described S shape pipe front portion has the circular hole of a Φ 7mm, the circular hole of a Φ 7mm is had in the counterbore that described S shape pipe rear portion is oblique, S shape about Guan Zhongfen described in two is arranged, described blind nut riveting is the blind nut riveting of M5, penetrate into after in the pipe box on middle chair cloth cover both sides until the S shape pipe described in two, blind nut described in four is penetrated from bottom to top the pipe box on middle chair cloth cover both sides, to penetrate into again in the circular hole of two S shape pipe front and rears and to rivet, blind nut described in four is riveted on the bottom surface of S shape pipe front and rear described in two, middle chair cloth cover is fixedly connected with two S shape pipes simultaneously, described cylindricality connection plug is the connection plug of the vertical cylindricality with nylon injection-molding, the diameter of the vertical cylindricality of described cylindricality connection plug is Φ 18.5mm, there is a U-shaped gap side of described cylindricality connection plug bottom, the opening of described cylindricality connection plug bottom U-shaped gap is 9mm, the degree of depth of described cylindricality connection plug bottom U-shaped gap is 13.7mm, a circular hole is had bottom the U-shaped of the U-shaped gap of described cylindricality connection plug, the aperture of the circular hole of described cylindricality connection plug is Φ 6mm, the circular hole of described cylindricality connection plug and the U-shaped bottom extremity of described cylindricality connection plug U-shaped gap, the axis of described cylindricality connection plug has a through hole, the aperture of described cylindricality connection plug axially extending bore is Φ 5mm, the through hole of the axis of described cylindricality connection plug is communicated with the gap of described cylindricality connection plug bottom, penetrate in the through hole of cylindricality connection plug axis described in four with four bolts, and twist in the blind nut received described in two described in S shape pipe front and rear bottom surface four, the bottom surface of S shape pipe front and rear described in four cylindricality connection plugs and two is fixed, by be connected to S shape pipe front and rear described in two four described in cylindricality connection plug, penetrate in the pore at foot lever 2 swan-neck top described in four from the top down, and twist bolt with the hand described in four and be screwed in the circular hole of described cylindricality connection plug opening position, the middle curved bar 3 described in two is allowed to be positioned the top of foot lever 2 described in four.

Described front bar 4, manage before comprising rectangle, rectangle connection plug and the vexed plug of rectangle, before described rectangle pipe by level metal rectangular pipe make, before described rectangle, bottom surface, pipe rear end has the hole of upward and downward, before described rectangle, the aperture in upward and downward hole, pipe rear end is Φ 4.2mm, described rectangle connection plug is the blank of rectangular aluminium type, the external diameter of described rectangle connection plug is corresponding with the caliber of pipe before described rectangle, described rectangle connection plug one has the hole of upward and downward, the aperture in a described rectangle connection plug upward and downward hole is Φ 4.2mm, described rectangle connection plug to be filled in before rectangle in the pore of pipe rear end, the hole of the upward and downward of described rectangle connection plug one, corresponding with the hole of the upward and downward of bottom surface, pipe rear end before described rectangle, the vexed plug of described rectangle is injection molded by plastics, the vexed plug of described rectangle is filled in the pore of pipe front end before described rectangle, front bar described in two about 4 points uses in pairs.

Described rear bar 5, comprise and managing by after rectangle, rectangle connection plug and the vexed plug of rectangle, after described rectangle, pipe is made up of level metal rectangular pipe, after described rectangle, bottom surface, pipe front end has the hole of upward and downward, after described rectangle, the aperture in upward and downward hole, pipe front end is Φ 4.2mm, described rectangle connection plug is the blank of rectangular aluminium type, the external diameter of described rectangle connection plug is corresponding with the caliber of pipe after described rectangle, described rectangle connection plug one has the hole of upward and downward, the aperture in a described rectangle connection plug upward and downward hole is Φ 4.2mm, described rectangle connection plug to be filled in after rectangle in the pore of pipe front end, the hole of a described rectangle connection plug upward and downward, corresponding with the hole of bottom surface, pipe front end upward and downward after described rectangle, the vexed plug of described rectangle is filled in the pore of pipe rear end after described rectangle, rear bar described in two about 5 points uses in pairs.

Described middle chair cloth cover 6 is made by nylon cloth to form, the both sides of described middle chair cloth cover 6 have manages corresponding pipe box with described S shape, S shape pipe described in two is penetrated respectively in the pipe box on described middle chair cloth cover 6 both sides, with the riveted joint bolt described in four by the circular hole of S shape pipe front and rear described in two and described in chair cloth cover 6 rivet fixing.

Described front chair cloth cover 7 is made by nylon cloth to form, there is the bagging corresponding with described front bar 4 on the both sides of described front chair cloth cover 7, front bar 4 described in two is penetrated from back to front respectively in the bagging on described front chair cloth cover 7 both sides, the layer of cloth on described front chair cloth cover 7 liang of baggings is penetrated from bottom to top with two self-plugging rivets, before penetrating rectangle described in two again, the hole of bottom surface, pipe rear end upward and downward neutralizes in the hole of rectangle connection plug upward and downward described in two and rivets, and is fixedly connected with by two of described front chair cloth cover 7 cover sacks with front bar described in two 4 back with rectangle connection plug described in two.

Described rear chair cloth cover 8 is made by nylon cloth to form, there is the bagging corresponding with described rear bar 5 on the both sides of described rear chair cloth cover 8, rear bar 5 described in two is penetrated from front to back respectively in the bagging on described rear chair cloth cover 8 both sides, the layer of cloth on described rear chair cloth cover 8 liang of baggings is penetrated from bottom to top with two self-plugging rivets, after penetrating rectangle described in two again, the hole of bottom surface, pipe front end upward and downward neutralizes in the hole of rectangle connection plug upward and downward described in two and rivets, and is fixedly connected with by two of described rear chair cloth cover 8 cover sacks with rear bar described in two 5 front with rectangle connection plug described in two.

By not with holes for two described rectangle connection plugs fixing with described front bar 4 one, penetrate in the pore of S shape pipe front end described in two from front to back respectively, and be inconjunction with the front that described front chair cloth cover 7 is connected to described middle chair cloth cover 6 together, by not with holes for two described rectangle connection plugs fixing with described rear bar 5 one, penetrate respectively from back to front in the pore of S shape pipe rear end described in two, and be inconjunction with the rear that described rear chair cloth cover 7 is connected to described middle chair cloth cover 5 together.

Claims

1. a folding beach chair, comprise curved bar in Yao Quan, four foot levers, two, two front bars, two rear bars, middle chair cloth cover, front chair cloth cover and rear chair cloth cover, it is characterized in that: waist circle is that the inner side of a nylon circle has four arc-shaped recess, a circle perforation is respectively had in four arc-shaped recess of waist circle, waist circle circle perforation outside with counterbore, when the arc-shaped recess of waist circle struts with foot lever and time folding wavy bend corresponding, foot lever comprises swan-neck, middle part blind nut, shoulder bolt, top blind nut, hand twists bolt and footmuff, swan-neck is formed by metal circular tube bending ram, in the middle of swan-neck, corrugate bends, the top of swan-neck curves inwardly, the outside that in the middle of swan-neck, corrugate is bending is with circular hole, swan-neck curves inwardly the outside above locating with circular hole, in circular hole in the middle of swan-neck, riveted joint has middle part blind nut, in the circular hole on swan-neck top, riveted joint has top blind nut, swan-neck bottom socket footmuff, four foot levers are penetrated in the nylon circle of waist circle, four shoulder bolts are penetrated in four circle perforation of waist circle, and twist in the middle part blind nut received on four foot levers, and tighten, allow four foot levers rotate with Yao Quan be connected, four hands being twisted bolt is screwed in the top blind nut of four foot levers, in two, curved bar respectively comprises S shape pipe, two blind nut, two cylindricality connection plugs and two bolts, S shape pipe is bent into the S shape of lying down by rectangular metal pipe, the bottom surface of S shape pipe front and rear respectively has a circular hole, arrange about two S shape pipes, penetrate into after in the pipe box on middle chair cloth cover both sides until two S shape pipes, four blind nut are penetrated from bottom to top the pipe box on middle chair cloth cover both sides, to penetrate into again in the circular hole of two S shape pipe front and rears and to rivet, by the bottom surface of four blind nut riveted joints with two S shape pipe front and rears, middle chair cloth cover is fixedly connected with two S shape pipes simultaneously, cylindricality connection plug is the connection plug of the vertical cylindricality with nylon injection-molding, there is a gap side of cylindricality connection plug bottom, the opening position of cylindricality connection plug has a circular hole vertical with gap, the axis of cylindricality connection plug has a through hole, the through hole of the axis of cylindricality connection plug is communicated with the gap of cylindricality connection plug bottom, penetrate in the through hole of four cylindricality connection plug axis with four bolts, and twist and to receive in two in the blind nut of curved bar front and rear bottom surface four, the bottom surface of four cylindricality connection plugs and two S shape pipe front and rears is fixed, four cylindricality connection plugs of two S shape pipe front and rears will be connected to, penetrate in the pore at four foot lever swan-neck tops from the top down, and twist bolt with four hands and be screwed in the circular hole of cylindricality connection plug opening position, curved bar in two is allowed to be positioned the top of four foot levers, front bar is managed by before rectangle, rectangle connection plug and the vexed plug of rectangle are formed, before rectangle, pipe is made up of rectangular metal pipe, rectangle connection plug is the blank of rectangular aluminium type, rectangle connection plug to be filled in before rectangle in the pore of pipe rear end, and it is fixing by self-plugging rivet riveted joint, the vexed plug of rectangle is injection molded by plastics, the front end of pipe before rectangle filled in by the vexed plug of rectangle, rear bar is managed by after rectangle, rectangle connection plug and the vexed plug of rectangle are formed, after rectangle, pipe is made up of rectangular metal pipe, rectangle connection plug to be filled in after rectangle in the pore of pipe front end, and it is fixing by self-plugging rivet riveted joint, the rear end of the vexed gag of rectangle pipe after rectangle, middle chair cloth cover is made by nylon cloth to form, there is the pipe box corresponding with middle curved bar on the both sides of middle chair cloth cover, the pipe box on middle chair cloth cover both sides is applicable to wear curved bar in two, front chair cloth cover is made by nylon cloth to form, there is the bagging corresponding with front bar on the both sides of front chair cloth cover, two front bars are penetrated from back to front respectively in the bagging on front chair cloth cover both sides, rear chair cloth cover is made by nylon cloth to form, there is the bagging corresponding with rear bar on the both sides of rear chair cloth cover, two rear bars are penetrated in the bagging on rear chair cloth cover both sides from front to back respectively, two front bars are penetrated in the pore of curved bar front end in two from front to back respectively, and be inconjunction with the front that front chair cloth cover is connected to middle chair cloth cover, two rear bars are penetrated in the pore of curved bar rear end in two from back to front respectively, and is inconjunction with the rear that rear chair cloth cover is connected to middle chair cloth cover.

2. folding beach chair according to claim 1, it is characterized in that: described waist circle is by the circle part of nylon injection-molding, there are four arc-shaped recess the inner side of described waist circle, four circles of described waist circle circle bore a hole into quartering distribution, the arc-shaped recess of described waist circle is positioned at forming V-shape on circle perforation, the arc-shaped recess of described waist circle is positioned under circle perforation and becomes inverted V-arrangement, the V-arrangement of the arc-shaped recess of described waist circle and inverted V-arrangement, wavy bending corresponding when strutting with foot lever and time folding, the counterbore in described waist circle four circle perforation outside is corresponding with the head of described shoulder bolt.

3. folding beach chair according to claim 1, is characterized in that: curving inwardly of described swan-neck, the swan-neck described in four to coordinate with described waist circle launch time, described swan-neck to curve inwardly with ground be vertical shape.

4. folding beach chair according to claim 1, it is characterized in that: the bottom surface punching at described S shape pipe rear portion has an oblique counterbore, the oblique counterbore in described S shape pipe rear portion is corresponding with curving inwardly of described swan-neck top when launching, the bottom surface of described S shape pipe front portion has the circular hole of a Φ 7mm, has the circular hole of a Φ 7mm in the counterbore that described S shape pipe rear portion is oblique.

5. folding beach chair according to claim 1, it is characterized in that: described blind nut riveting is the blind nut of M5, described cylindricality connection plug is the connection plug of the vertical cylindricality with nylon injection-molding, there is a U-shaped gap side of described cylindricality connection plug bottom, a circular hole is had, the circular hole of described cylindricality connection plug and the U-shaped bottom extremity of described cylindricality connection plug U-shaped gap bottom the U-shaped of the U-shaped gap of described cylindricality connection plug.

6. folding beach chair according to claim 1, it is characterized in that: before described rectangle, bottom surface, pipe rear end has the hole of upward and downward, before described rectangle, the aperture in upward and downward hole, pipe rear end is Φ 4.2mm, the external diameter of described rectangle connection plug is corresponding with the caliber of pipe before described rectangle, described rectangle connection plug one has the hole of upward and downward, and the aperture in a described rectangle connection plug upward and downward hole is Φ 4.2mm.

7. folding beach chair according to claim 1, is characterized in that: the hole of a described rectangle connection plug upward and downward, and corresponding with the hole of bottom surface, pipe rear end upward and downward before described rectangle, the vexed plug of described rectangle is injection molded by plastics.

8. folding beach chair according to claim 1, it is characterized in that: after described rectangle, bottom surface, pipe front end has the hole of upward and downward, after described rectangle, the aperture in upward and downward hole, pipe front end is Φ 4.2mm, the external diameter of described rectangle connection plug is corresponding with the caliber of pipe after described rectangle, described rectangle connection plug one has the hole of upward and downward, and the aperture in a described rectangle connection plug upward and downward hole is Φ 4.2mm.

9. folding beach chair according to claim 1, is characterized in that: the hole of a described rectangle connection plug upward and downward, corresponding with the hole of bottom surface, pipe front end upward and downward after described rectangle.

10. folding beach chair according to claim 1, it is characterized in that: penetrate the layer of cloth on described front chair cloth cover two bagging from bottom to top with two self-plugging rivets, before penetrating rectangle described in two again, the hole of bottom surface, pipe rear end upward and downward neutralizes in the hole of rectangle connection plug upward and downward described in two and rivets, two of described front chair cloth cover cover sacks are fixedly connected with rectangle connection plug described in two with rod rear end front described in two, the layer of cloth on described rear chair cloth cover two bagging is penetrated from bottom to top with two self-plugging rivets, after penetrating rectangle described in two again, the hole of bottom surface, pipe front end upward and downward neutralizes in the hole of rectangle connection plug upward and downward described in two and rivets, two of described rear chair cloth cover cover sacks are fixedly connected with rectangle connection plug described in two with rear bar front described in two.