CN2298725Y - Folding chair - Google Patents

Abstract

The utility model relates to a folding tubular metal chair which comprises a front and a back foot tubes, a cushion and a backup plate. The upper end of the front foot tube is provided with inlaying grooves for inlaying and inserting inlaid flaps additionally arranged at both sides of the backup plate, a convex pole is arranged in the middle part of the front foot tube, and a U-shaped pin bush arranged above the convex pole is additionally provided with a clip projecting rearward. The upper end of the back foot tube is clamped in the clip and connected with the clip by a pin, and the back foot tube is provided with a rail groove. The center of the cushion is provided with a casing tube for sheathing with the convex pole of the front foot tube, and the back end of the cushion is provided with a sliding tube which is inlaid in the rail groove of the back foot tube. The utility model has the advantages that the components of the utility model has high structural strength and high stability; the extension or the fold of the utility model is completed by the displacement and the match of the sliding tube in the rail groove, so the utility model has smooth action, convenient use and long service life.

Description

A kind of fold-down seat

The utility model relates to a kind of metallic chair of folding tubulose.

General chair is with the place and the purposes of its use, and different moulding and material are arranged, wherein supplying with not the qualified majority people gathers and uses chair, usually all adopt fold-down seat, can amount to by it, to reach the facility of harvesting carrying, commonly use fold-down seat (1), as shown in Figure 1, be before inciting somebody to action, rear foot tube (11) (12) utilizes a pin sheet (13) that is strip to be riveted by outer side edges, simultaneously cushion (14) is with preceding, the rear foot tube corresponding section dashes establishes with after the perforation, utilize pin (15) keying in preceding, locate on the rear foot tube, and nationality and the action that launches and amount to, backup plate (16) then lies in dual side-edge and establishes with ringent volume circle (17) in addition, it is fixing to utilize the volume circle of this dual side-edge to be set in place, front foot pipe upside, this structure can reach the function of amounting to admittedly and be convenient to harvesting, the perforation that but comes cushion to dash establishes, under there is no other safeguard procedures just directly with before, rear foot barrel bolt closes, therefore after the pressure of long-term grantee's body weight is negative, be easy to cause perforation thereby distortion, cause the location that cushion can't be firm, and can rock, in addition because the volume of backup plate circle is the opening shape, therefore under long-term leaning on, the volume circle will take place strutted, cause backup plate to come off, even have the thing that crushes, in addition, front/back foot tube is only with the pin sheet keying of strip, not only more built on the sand, and the also thing that jams a finger easily.

In addition, as shown in Figure 2, the dealer who has is to be coated on front foot pipe (11) upper end after directly establishing so that a steel plate is curved to be welded in order to improve the drawback that backup plate comes off easily again, make and form backup plate (18), it can avoid rolling up the defective that circle is strutted admittedly, but because of being to utilize electric welding machine spot welding to fix, if in operation, the carelessness part is arranged slightly, when causing not prison welding solid, when there being collision to take place slightly, will burst apart, so also do not improve really.

The purpose of this utility model aims to provide that a kind of structure is firm, expansion and folding are smooth and easy, the convertible chair of long service life.

The utility model is made up of front foot pipe, rear foot tube, cushion and backup plate, forward and backward pin pipe is the hollow tube of arbitrary geometry, the embedding ditch is offered in the inboard, upper end of front foot pipe, mouth of pipe cutting ferrule one pipe box, middle appropriate location is established a projection, the body rear side of projection top sets firmly one " Qian " shape guide, and guide lower end two sides extend the intermediate plate that protrudes backward, and establishes connecting leg at the downside appropriate location spiral shell of two bodys of front foot pipe.The also sheathed pipe box of the rear foot tube upside mouth of pipe, the body inboard sets firmly a rail groove, and two body downsides also spiral shell are established a connecting leg.In guide downside two intermediate plates of two bodys upper end cutting ferrule on front foot pipe of rear foot tube, and utilize pin or blind rivet pin to close.Cushion sets firmly a sleeve pipe in the nearly centre of the downside of framework, and to be nested in the projection side face of front foot pipe, the rear end of framework two sides extends the slip pipe of outside protrusion, and embeds in the rail groove of rear foot tube.Backup plate extends dummy slider in two sides of a plate body, and this dummy slider is inserted the inlay card location, embedding ditch place be embedded in front foot pipe, on the plate body and establish a concave arc that protrudes backward.

The utility model because of before, rear foot tube is the guide keying one with the U-shaped shape, and guide is folder Shu Yuqian, the side face of rear foot tube, therefore be a very firm form after the combination, before, the thing that rear foot tube can never rock, cushion system is placed in the projection place of front foot pipe with the casing clamp that is fixedly arranged on its framework downside simultaneously, thereby can commonly use with the solid person of perforated pins and have higher capacity, even long-term negative pressure, the also thing that can not burst apart, in addition, backup plate system is intercalated in the location, embedding ditch place of front foot pipe upper end, does not therefore have to commonly use that the volume circle is stressed to strut so that break away from, or the thing that comes off admittedly of not prison welding, thereby the structural strength at each position of the utility model comparatively not commonly used the person be good, and can prolong the life-span of using, and the end face of backup plate is provided with concave arc, this design just is available for users to leaning on back, has improved comfort level.Its expansion or to amount to be to utilize the cooperation of slip pipe in the displacement of rail groove in addition, therefore very smooth and easy of action especially when amounting to, as long as promptly fold automatically on the other hand chair is improved, needn't need operate with both hands as the person of commonly using, and can improve the convenience in the use.

Fig. 1,2 stereograms for existing fold-down seat.

Fig. 3 is a stereogram of the present utility model.

Fig. 4 is STRUCTURE DECOMPOSITION figure of the present utility model.

Fig. 5,6 is an action schematic diagram of the present utility model.

Fig. 7 is another embodiment schematic diagram.

Below in conjunction with accompanying drawing structure of the present utility model is described further.

Embodiment 1:

At first see also Fig. 3,4, the utility model fold-down seat (2) is the same as with the person of commonly using front foot pipe (21), rear foot tube (22), cushion (23) and backup plate (24) are formed, wherein, rear foot tube (21) (22) is square hollow tube, offer with embedding ditch (211) in the inboard, upper end of front foot pipe (21), and at the pipe box (212) of mouth of pipe cutting ferrule one plastic cement material, then establish a projection (213) at middle appropriate location, certainly establish with connecting leg (214) at downside appropriate location spiral shell as the person of commonly using of front foot pipe (21) two bodys, two bodys are combined as a whole, at rear side end upside place sheathing one guide (215) back spiral shell fixed bit, this guide (215) is to extend the intermediate plate (2151) that protrudes with backward in a U-iron lower end two sides simultaneously.

The also sheathed pipe box of rear foot tube (22) the upside mouth of pipe (221), and set firmly the rail groove (222) of a suitable length in the inboard, same rear foot tube (22) two body downside appropriate locations also spiral shell are established a connecting leg (223), and two bodys are combined as a whole.

The central authorities that cushion (23) ties up to a framework (231) are installed with the wire side (232) that weaves with rattan peel, and set firmly a sleeve pipe (233) in the nearly centre of framework (231) downside, the projection (213) of the outside of this sleeve pipe (233) and front foot pipe (21) is suitable, extends the slip pipe (234) with outside protrusion simultaneously and in the rear end of framework (231) two sides.

Two sides that backup plate (24) then ties up to a plate body (241) have extended dummy slider (242), this dummy slider (242) can be inserted the embedding ditch (211) that is embedded in front foot pipe (21) and locate, and make backup plate (24) inlay card locate, dummy slider (242) also can be against the internal perisporium of front foot pipe (21) simultaneously, making is a firm positioning states, can not rock the unstable thing of vibrations, and go up and establish a concave arc (243) that protrudes backward at plate body (241).

During combination, cushion (23) is nested in projection (213) side face of front foot pipe (21) with the sleeve pipe (233) of its downside, the slip pipe (234) of rear end then embeds in the rail groove (222) of rear foot tube (22) simultaneously, again with rear foot tube (22) upper end cutting ferrule in guide (215) downside two intermediate plates (2151), and utilize pin (or blind rivet) to sell and establish combination, and making the movable location of rear foot tube (22) for swinging, backup plate (24) is then located from embedding ditch (211) the insertion inlay card of front foot pipe (21) upper end with the dummy slider (242) of its two side again.

See also Fig. 5 again, Fig. 6, when desire makes chair amount to, as long as holding backup plate (24) up carries, then can swing because of rear foot tube (22), therefore just draw close in liftoff back and paste together to front foot pipe (21), and along with the closing of rear foot tube (22) to front foot pipe (21), cushion (23) is owing to nearly centre is located in the projection (213) of front foot pipe (21) with sleeve pipe (233) cutting ferrule, and rear side then is intercalated within the rail groove (222) of rear foot tube (22) with slip pipe (234), therefore the front side end of cushion (23) is upwards swing of benchmark with sleeve pipe (233) promptly, the slip pipe (234) of rear side then follows rail groove (222) to lower slider simultaneously, and the state that makes chair be amounting to, when launching as if desire in addition, then as long as push downwards facing to the front end application of force of cushion (23), even same cushion (23) be the center swing with sleeve pipe (233), and the slip pipe (234) that makes its rear side is by the past location that rises to of rail groove (222) downside, with the time and with the past rear distraction of rear foot tube (22), making is a state that launches.

Embodiment 2: referring to Fig. 7, cushion (23) also can be hollow plate body shape, dashes the draw-in groove of establishing to inwardly concave in dual side-edge and front foot pipe (21) inner side edge projection (213) corresponding section simultaneously, and is nested for projection (213), make cushion and front foot pipe tabling, and swing with projection.The cushion rear side is equally also established in the rail groove that slip pipe is embedded in rear foot tube, makes the cushion can strong fix.

Claims (5)

1. fold-down seat, comprise front foot pipe, rear foot tube, cushion and backup plate, the equal spiral shell of two body downsides of forward and backward pin pipe is established a connecting leg, the embedding ditch is offered in the inboard, upper end that it is characterized in that front foot pipe, a projection is established in the stage casing, and the body rear side of projection top sets firmly one " Qian " shape guide, and guide lower end two sides extend the intermediate plate that protrudes backward, two bodys of rear foot tube upper end cutting ferrule and closes with pin or blind rivet pin in intermediate plate; Two body inboards of rear foot tube set firmly the rail groove; Cushion sets firmly a sleeve pipe in the both sides of the framework nearly centre of downside, and to be nested in the projection of front foot pipe, the rear end of framework two sides extends the slip pipe of outside protrusion, and embeds in the rail groove of rear foot tube; Backup plate extends dummy slider in two sides of a plate body, and this dummy slider is inserted the inlay card location, embedding ditch place that is embedded in front foot pipe.

2. a kind of fold-down seat as claimed in claim 1 is characterized in that on the plate body of backup plate and establishes a concave arc that protrudes backward.

3. a kind of fold-down seat as claimed in claim 1 is characterized in that all sheathed pipe box of the upside mouth of pipe of forward and backward pin pipe.

4. a kind of fold-down seat as claimed in claim 1 is characterized in that cushion is that central authorities in a framework set firmly the wire side with the rattan peel braiding.

5. a kind of fold-down seat as claimed in claim 1 is characterized in that cushion is hollow plate body shape, and the dual side-edge stage casing dashes establishes the projection inlay card that the draw-in groove that inwardly concaves supplies front foot pipe.

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