CN210961115U - Chair leg bridging piece and butterfly chair - Google Patents

Abstract

The utility model relates to a chair foot bridgeware, wherein: the bridging piece is formed by punching a steel plate, two groups of bending surfaces are arranged on the same surface, two bending surfaces in each group are parallel to each other, and a through hole for a rivet or a shaft to pass through is formed; and the axial leads of the through holes in the two groups of bending surfaces form an included angle, so that the bridging positioning of the two vertical surface supports of the folding chair is met. The bridging piece formed by the steel plate is more durable than the plastic bridging piece, is not easy to age and has large bearing capacity; the butterfly chair using the bridge piece and the additional reinforcing wrapping piece designed at the hinge point of the pipe fitting can be directly manufactured by adopting a lighter pipe fitting, and the structure is light.

Description

Chair leg bridging piece and butterfly chair

The technical field is as follows:

the utility model belongs to the folding chair field, in particular to chair foot bridging piece and butterfly chair, especially the bridging piece is by steel sheet stamping forming, has better intensity and toughness.

Background art:

the butterfly chair is a specific style in the classification of folding chairs, simulates the modeling effect of butterfly double wings according to different modeling of the sitting and leaning fabrics, and meets different aesthetic requirements. For example, CN02270597X discloses a butterfly-shaped chair frame, which is formed by pivotally connecting a plurality of pipe elements, and comprises a first backrest body, a second backrest body, a first chair seat body and a second chair seat body, wherein the pipe elements have the same structure, and two ends of the pipe elements are made into a flat body with different arc surfaces to increase the bending resistance of the pipe elements. The adjacent pipe fittings are connected by means of hinging between the flat bodies, and the middle parts of the two pipe fittings in the same vertical surface are hinged with each other to form a complete supporting body. According to the patent, adjacent surfaces are directly riveted by rivets without an additional bridging piece, but the pipe fitting needs to adopt solid steel bars or steel wires, otherwise, the bearing requirement cannot be met, and the processing such as flattening, bending and the like is relatively troublesome.

CN201420432593.4, further discloses an improved butterfly chair, which comprises a support frame and a seat and back fabric, wherein the support frame comprises four long rods and four short rods; the front vertical face is hinged by two short rod pieces in a crossed manner, the rear vertical face is hinged by two long rod pieces in a crossed manner, the vertical faces at two sides are hinged by a short rod piece and a long rod piece, the upper end parts of the adjacent vertical face rod pieces are hinged with each other to form a front supporting point and a rear supporting point, and the lower end parts of the adjacent vertical face rod pieces are hinged with each other to form four landing supporting points; four contacts of the sitting and leaning fabric are respectively hung on the two front supporting points and the two rear supporting points. The chair frame directly utilizes the square tube to replace a solid steel bar or a steel wire, does not need to be bent and flattened, and has lighter overall weight.

CN2016206655957 discloses a solid wood crossed foldable butterfly chair, which is made of square hard solid wood to achieve the purpose of reducing weight. Of course, the butterfly chair also provides a novel supporting structure which comprises side supporting frames at the left side and the right side, a front supporting frame and a rear supporting frame which are arranged between the side supporting frames, and a seat cloth; the side support frame includes the side support pole, rotates handrail and the back supporting leg of connecting at the side support pole middle part, and preceding moving part is installed to the lower terminal surface of side support pole front end and bar, preceding support frame is installed in the front on the moving part, install back moving part on the upper end of side support pole and the back end of back support frame, back support frame is installed on the moving part of back, the fixed part is reserved respectively to the end before the bar and the side support pole rear end, the seat cloth is fixed on the fixed part. In the structure, a supporting rod is arranged in each of the front vertical surface and the rear vertical surface and needs to be broken into two sections, the supporting rods are connected by a fixing piece and form cross hinge with the other supporting rod, and the processing technology is complex.

In summary, the movable members or the hinge members are required to be used between adjacent vertical surfaces of all the folding chairs for providing the movable hinge joint between the rod members or the pipe members, and the movable members or the hinge members at the landing ends also play a role in supporting the landing. Therefore, a reasonable high-strength bridging piece is provided, which is the object of the present invention.

The invention content is as follows:

the utility model aims at designing a chair leg bridging piece formed by stamping steel plates and a butterfly chair formed by hinging the bridging piece.

The utility model discloses technical scheme realizes like this: a chair foot bridge, comprising: the bridging piece is formed by punching a steel plate, two groups of bending surfaces are arranged on the same surface, two bending surfaces in each group are parallel to each other, and a through hole for a rivet or a shaft to pass through is formed.

The included angle of the axes of the through holes on the two groups of bending surfaces is between 70 and 120 degrees.

The bridging piece is provided with a plastic sleeve at least on one grounded surface and has the following two structures: firstly, the plastic sleeve is independently formed and embedded on the bridging piece; secondly, the bridging piece is embedded and molded in the plastic sleeve.

A butterfly chair comprises a sitting and leaning fabric, side brackets corresponding to or symmetrical with a left vertical surface and a right vertical surface, a front bracket of a front vertical surface, a rear bracket of a rear vertical surface and a chair leg bridging piece; the side supports of the left vertical surface and the right vertical surface are connected by a front support and a rear support to form a foldable and openable whole, and the sitting and leaning fabric is suspended on the upper edges of the front vertical surface and the rear vertical surface; the method is characterized in that: the side support, the front support and the rear support are all formed by processing hollow pipe fittings, and the landing end parts of adjacent vertical surface pipe fittings are hinged on the through holes of the bending surfaces of the corresponding groups of the bridging pieces; and at least in the front bracket, the surface of the pipe fitting with the hinge point in the middle is fixedly riveted or welded with a reinforced wrapping sheet, and the reinforced wrapping sheet covers the pipe fitting at one section of the hinge point to share the stress of the hinge shaft or the rivet.

The front support and the rear support are both composed of two pipe fittings with the middle parts thereof hinged together in a crossed manner, and the side supports of the left vertical surface and the right vertical surface comprise a backrest rod, a support rod and a cushion rod; the lower end part of the backrest rod is hinged to the bridge piece of the front vertical surface, the upper part of the backrest rod is hinged to the upper end part of the pipe fitting of the rear vertical surface through a hinge piece, the lower end part of the support rod is hinged to the bridge piece of the rear vertical surface, the upper end part of the support rod is hinged to the middle part of the backrest rod, the front part of the cushion rod is hinged to the upper end part of the pipe fitting of the front vertical surface through a hinge piece, and the rear end; the front end of the sitting and leaning fabric is sleeved and fixed at the front end parts of the two cushion rods at least at two corners, and the rear end is sleeved and fixed at the upper end part of the backrest rod.

In the side bracket, the hinge points of the cushion rod, the supporting rod and the backrest rod are vertically distributed and hinged at the same side of the backrest rod, and a bearing piece is hinged between the two hinge points; the surface of one side of the backrest rod, which is far away from the cushion rod, is fixedly riveted or welded with a reinforcing wrapping sheet.

The front end of the cushion rod and the upper end of the backrest rod are both locked with plastic pads.

The end part of the pipe fitting hinged to the bridging piece is sleeved with a bearing pad, the bearing pad is of a disc structure formed by plastic, a rivet hole is formed in the axis of the bearing pad, and an insertion hole orthogonal to the rivet hole is formed in the radial direction; the pipe fitting is inserted into the jack, and the rivet of the riveting bridging piece penetrates through the bearing pad and the pipe fitting to form a three-part hinged structure.

The reinforcing wrapping sheet is in a semicircular arc shape, the inner diameter of the reinforcing wrapping sheet is equivalent to the outer diameter of the pipe fitting and can be attached to the surface of the pipe fitting, and the length of the reinforcing wrapping sheet is between 15cm and 25 cm.

Two pipe fittings with the middle parts hinged together in a crossed manner in the front support and the rear support are hinged with a double-section hinge between the two pipe fittings above the hinged point, and the double-section hinge restricts the opening angles of the front support and the rear support.

The utility model provides a steel plate forming bridging piece for a folding chair, which is more durable than a plastic forming bridging piece, is not easy to age, has large bearing capacity and resists impact; the butterfly chair using the bridge piece and the additional reinforcing wrapping piece designed at the hinge point of the pipe fitting can be directly manufactured by adopting a lighter pipe fitting, and the structure is light.

Description of the drawings:

the present invention will be further explained with reference to the following specific drawings:

FIG. 1 is a schematic view of a bridge

FIG. 2 is a top view of the bridge

FIG. 3 is an exploded view of the bridge

FIG. 4 is a schematic view of a butterfly chair

FIG. 5 is a schematic view of a butterfly chair support

FIG. 6 is an enlarged view of part A of FIG. 5

FIG. 7 is an enlarged view of a portion B of FIG. 5

FIG. 8 is an enlarged view of a portion C of FIG. 5

FIG. 9 is a schematic view of a butterfly chair support in elevation

FIG. 10 is an enlarged view of a portion D of FIG. 9

Wherein

1-bridge piece 10-hinge piece 11-bending surface 12-through hole

13-plastic cover 2-sitting and leaning fabric 3-side bracket 31-backrest rod

32-support rod 33-cushion rod 34-bearing piece 4-front support

5-rear support 6-pipe fitting 61-bearing pad 611-rivet hole

612-jack 7-reinforced wrapping sheet 8-plastic pad 9-double-section hinge

91-hinge piece 92-angle X-axis line included angle

The specific implementation mode is as follows:

referring to fig. 1, 2 and 3, a bridge 1 of the chair leg bridge is formed by punching a steel plate, and has two groups of bending surfaces 11 facing the same surface, wherein two bending surfaces 11 in each group are parallel to each other and are provided with through holes 12 for passing rivets or shafts; an included angle is formed between the two groups of bending surfaces 11 so as to meet the hinging positioning of two adjacent vertical surface supports. More specifically, the included angle X between the axes of the through holes 12 on the two bending surfaces is 70 degrees to 120 degrees, and most folding chairs are of a four-vertical-surface structure, so that the two through holes 12 are 90 degrees. However, some folding chairs have a shape that the front vertical surface is wide and the rear vertical surface is narrow, at the moment, two groups of bridging pieces with the included angle of the bending surfaces smaller than 90 degrees need to be used at two foot ends of the front vertical surface, and two groups of bridging pieces with the included angle of the bending surfaces larger than 90 degrees need to be used when the rear vertical surface is opposite.

In order to avoid the bridge 1 formed by the steel plate directly contacting the ground, the bridge 1 is provided with a plastic sleeve 13 at least on one surface which lands on the ground, and has the following two structures: firstly, the plastic sleeve 13 is independently formed, is embedded on the bridging piece 1 and can be riveted together by a rivet which passes through the through hole 12 and is hinged with the pipe fitting; secondly, the bridging piece 1 is embedded and molded in the plastic sleeve, namely, the bridging piece 1 is wrapped with plastic. In addition to injection molding, hot spray molding may also be used. There is also a state where the pipe member, which is landed using the folding chair, is landed while the bridge 1 is suspended without contacting the ground.

As shown in fig. 4 to 10, a butterfly chair comprises a sitting fabric 2, side brackets 3 corresponding to or symmetrical to each other on left and right vertical surfaces, a front bracket 4 on a front vertical surface, a rear bracket 5 on a rear vertical surface, and the above-mentioned chair leg bridge 1; the side brackets 3 of the left and right vertical surfaces are connected by a front bracket 4 and a rear bracket 5 to form a foldable and openable whole; the side support 3, the front support 4 and the rear support 5 are all formed by processing hollow pipe fittings 6, the landing end parts of adjacent vertical surface pipe fittings are hinged on the through holes 12 of the bending surfaces of the corresponding group of the bridging part 1, namely, the pipe fittings 6 of the adjacent surface landing ends are hinged into a whole through the bridging part 1; at least in the front bracket 4, a reinforced wrapping sheet 7 is riveted or welded on the surface of the pipe fitting 6 with a hinge point in the middle, and the reinforced wrapping sheet 7 covers the pipe fitting at one section of the hinge point and shares the stress of the hinge shaft or the rivet together. Furthermore, the reinforcing wrapping sheet 7 is in a semicircular arc shape, the inner diameter of the reinforcing wrapping sheet is equivalent to the outer diameter of the pipe fitting 6 and can be attached to the surface of the pipe fitting, the length of the reinforcing wrapping sheet 7 is 15 cm-25 cm, and the bearing capacity of one section of the pipe fitting at the hinged point is enhanced.

The four feet of the butterfly chair can be landed on the bridge 1 or the end of the pipe fitting 6, and the bridge 1 is in a micro-suspension state. In the former, the plastic sleeve 13 sleeved outside the bridging piece can be used for landing, so that the bridging piece 1 is prevented from directly contacting the ground and wearing the floor; the latter, in turn, is supported by the end of the tube 6, for which purpose the end of the tube 6 is treated as follows:

as shown in fig. 5 and 8, and fig. 9 and 10, the end of the pipe hinged to the bridge 1 is sleeved with a bearing pad 61, the bearing pad 61 is of a disc structure formed by plastic, a rivet hole 611 is formed at the axial center, and a jack 612 orthogonal to the rivet hole is radially formed; the pipe fitting 6 is inserted into the insertion hole 612, and the rivet riveting the bridge 1 penetrates through the bearing pad 61 and the pipe fitting 6 to form a three-part hinge structure. The function of the bearing pad 61 can reduce the friction between the metal pipe fitting 6 and the metal bridging piece 1, and the bridging piece 1 can be landed by the bearing pad, and the bridging piece 1 is slightly floated, so that the bearing pad is lighter than the plastic sleeve 13 when viewed from the outside.

The front bracket 4 and the rear bracket 5 are both composed of two pipe fittings 6 with the middle parts thereof hinged together in a crossed way, and the side brackets 3 of the left and right vertical surfaces comprise a backrest rod 31, a support rod 32 and a cushion rod 33; the lower end of the backrest rod 31 is hinged on the bridge 1 on which the front vertical surface 3 lands, the upper part of the backrest rod 31 is hinged with the upper end of the pipe fitting of the rear vertical surface 5 through a hinge 10, the lower end of the support rod 32 is hinged on the bridge 1 on which the rear vertical surface 5 lands, the upper end of the support rod is hinged in the middle of the backrest rod 31, the front part of the cushion rod 33 is hinged with the upper end of the pipe fitting of the front vertical surface 4 through the hinge 10, and the rear end of the; the front end of the sitting and leaning fabric 2 is sleeved and fixed at the front end parts of the two cushion rods 33 at least at two corners, and the rear end is sleeved and fixed at the upper end part of the backrest rod 31, so that a suspension structure with a low front part and a high rear part is formed, and the sitting and leaning requirements are met. Therefore, the plastic cushions 8 are locked at the front end parts of the cushion rods 33 and the upper end parts of the backrest rods 31, so that the stress area can be increased, and the stress concentration of the sitting and leaning fabric 2 is reduced.

In addition, in the structure, the cushion rods 33 on the left side and the right side are relatively flat, so that the sitting fabric 2 can be directly sleeved on the two cushion rods 33 corresponding to the two sides of the cushion part, thereby forming a larger area of support, namely forming a common folding chair shape. The butterfly chair is only one specific style of common folding chairs, is mainly embodied in the cutting shape of the sitting and leaning fabric 2, is similar to a butterfly shape, and has no essential difference.

In the side brackets 3 at two sides, the hinged points of the cushion rod 33 and the support rod 32 with the backrest rod 31 are distributed up and down and hinged at the same side of the backrest rod 31, and a bearing piece 34 is hinged between the two hinged points; the surface of one side of the backrest rod 31 far away from the cushion rod 33 is also riveted or welded with a reinforcing wrapping sheet 7 to reinforce the bearing force of the middle part of the pipe fitting of the backrest rod 31.

Further, two pipe fittings 6 are hinged together in the middle of the front support 4 and the rear support 5 in a crossed mode, a double-section hinge 9 is hinged between the two pipe fittings 6 above a hinge point, the double-section hinge 9 restrains the opening angles of the front support 4 and the rear support 5, and meanwhile stress at the hinge point can be relieved. The reinforcing wrap 7 corresponding thereto also extends over the hinge point of the hinge double hinge 9. In addition, the double-section hinge 9 is formed by hinging one end of two hinge pieces 91, a bevel 92 is arranged at the end corner of one hinge piece 91, the bevel 92 is used for blocking the edge of the other hinge piece to form limiting constraint, the double-section hinge 9 is prevented from being opened to be parallel, namely, the opening angle of the double-section hinge 9 is within 180 degrees, and the two hinge pieces 91 of the double-section hinge can be folded along the same direction during the folding operation of the folding chair, so that the operation process is not hindered. Certainly, the adoption of a scheme without limit is not excluded, the structure with 180 degrees or over 180 degrees can be opened, and the folding operation of the folding chair can be smoothly completed only by lifting the two links 9 with two hands in the folding process.

Claims (10)

1. A chair foot bridge, comprising: the bridging piece is formed by punching a steel plate, two groups of bending surfaces are arranged on the same surface, two bending surfaces in each group are parallel to each other, and a through hole for a rivet or a shaft to pass through is formed.

2. A chair foot bridge according to claim 1 wherein: the included angle of the axes of the through holes on the two groups of bending surfaces is between 70 and 120 degrees.

3. A chair foot bridge according to claim 1 wherein: the bridging piece is provided with a plastic sleeve at least on one surface which lands on the ground and has the following two structures: firstly, the plastic sleeve is independently formed and embedded on the bridging piece; secondly, the bridging piece is embedded and molded in the plastic sleeve.

4. A butterfly chair comprises a sitting and leaning fabric, side brackets corresponding to or symmetrical with a left vertical surface and a right vertical surface, a front bracket of a front vertical surface and a rear bracket of a rear vertical surface, wherein the side brackets of the left vertical surface and the right vertical surface are connected by the front bracket and the rear bracket to form a whole which can be folded and unfolded, and the sitting and leaning fabric is suspended on the upper edges of the front vertical surface and the rear vertical surface; the method is characterized in that: further comprising a chair foot bridge according to any one of claims 1 to 3; the side support, the front support and the rear support are all formed by processing hollow pipe fittings, and the landing end parts of adjacent vertical surface pipe fittings are hinged on the through holes of the bending surfaces of the corresponding groups of the bridging pieces; and at least in the front bracket, the surface of the pipe fitting with the hinge point in the middle is fixedly riveted or welded with a reinforced wrapping sheet, and the reinforced wrapping sheet covers the pipe fitting at one section of the hinge point to share the stress of the hinge shaft or the rivet.

5. The butterfly chair as claimed in claim 4, wherein: the front support and the rear support are both composed of two pipe fittings with the middle parts thereof hinged together in a crossed way, and the side supports of the left vertical surface and the right vertical surface comprise a backrest rod, a support rod and a cushion rod; the lower end part of the backrest rod is hinged to the bridge piece of the front vertical surface, the upper part of the backrest rod is hinged to the upper end part of the pipe fitting of the rear vertical surface through a hinge piece, the lower end part of the support rod is hinged to the bridge piece of the rear vertical surface, the upper end part of the support rod is hinged to the middle part of the backrest rod, the front part of the cushion rod is hinged to the upper end part of the pipe fitting of the front vertical surface through a hinge piece, and the rear end; the front end of the sitting and leaning fabric is sleeved and fixed at the front end parts of the two cushion rods at least at two corners, and the rear end is sleeved and fixed at the upper end part of the backrest rod.

6. The butterfly chair as claimed in claim 5, wherein: in the side bracket, the hinge points of the cushion rod, the supporting rod and the backrest rod are distributed up and down and are hinged at the same side of the backrest rod, and a bearing piece is hinged between the two hinge points; the surface of one side of the backrest rod, which is far away from the cushion rod, is fixedly riveted or welded with a reinforcing wrapping sheet.

7. The butterfly chair as claimed in claim 6, wherein: the front end of the cushion rod and the upper end of the backrest rod are both locked with plastic pads.

8. The butterfly chair as claimed in claim 4 or 5, wherein: the end part of the pipe fitting hinged on the bridging piece is sleeved with a bearing pad, the bearing pad is of a disc structure formed by plastic, a rivet hole is formed at the axis, and a jack orthogonal to the rivet hole is radially formed; the pipe fitting is inserted into the jack, and the rivet of the riveting bridging piece penetrates through the bearing pad and the pipe fitting to form a three-part hinged structure.

9. The butterfly chair as claimed in claim 4 or 6, wherein: the reinforcing wrapping sheet is in a semicircular arc shape, the inner diameter of the reinforcing wrapping sheet is equivalent to the outer diameter of the pipe fitting and can be attached to the surface of the pipe fitting, and the length of the reinforcing wrapping sheet is between 15cm and 25 cm.

10. The butterfly chair as claimed in claim 4 or 5, wherein: two pipe fittings that the middle part alternately articulated together in fore-stock and the after-poppet, it has two sections hinges still to articulate between two pipe fittings above the pin joint, and this two sections hinges restraint fore-stock and after-poppet open angle.

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