Folding chair

Abstract

The application discloses a folding chair, which comprises a seat plate, front legs and rear legs, the rear legs are telescopic, the rear legs comprise an outer tube and an inner tube which is movably and telescopically inserted into the outer tube, the top end of the inner tube extends from the upper end of the outer tube and is directly or indirectly rotationally connected with the upper part of the front leg, the inner tube gradually extends into the outer tube during the unfolding of the folding chair until the lower end of the inner tube is blocked by the limiting structure, when the lower end of the inner tube is blocked by the limiting structure, the extension section between the upper end of the inner tube and the upper end of the outer tube is exposed to avoid the fingers being pinched by the upper end of the inner tube and the upper end of the outer tube. The hidden limiting structure can avoid the situation that the fingers are directly pinched, and after the folding chair is completely unfolded, the upper part of the inner tube is still exposed to the extension section, so that the fingers cannot be pinched by the upper end of the inner tube and the upper end of the outer tube, and the operation is safe.

Description

TECHNICAL FIELD

[0001] The present application relates to a folding chair. BACKGROUND

[0002] Folding chairs can be opened and folded at will, although the styles are various, but the basic structure is roughly the same, that is, the front legs and the rear legs are hingedly connected in a herringbone shape, and the front legs and the rear legs jointly support the seat cushion. Among them, in order to ensure that the folding chair can be normally opened and closed, a yielding structure is essential. One kind of yielding structure is to provide a sliding groove between the seat cushion and the front legs and / or the rear legs, and the sliding groove provides the yielding freedom required in the opening and closing process of the folding chair. Another yielding structure is to design the rear legs as telescopic legs, which provide the yielding freedom required in the opening and closing process by lengthening and shortening.

[0003] The first sliding groove type of yielding structure, in addition to setting a sliding groove on the seat cushion, the front and rear legs also need to set sliding support parts corresponding to the sliding groove, the structure is relatively complex. SUMMARY

[0004] The present application provides a folding chair which is simple in structure and safer in opening and closing operation. The technical scheme adopted by the present application to solve its technical problems is:

[0005] The folding chair comprises a seat plate and a herringbone support structure symmetrically arranged on the left and right sides of the seat plate, the seat plate is pivotally connected with the herringbone support structure, the herringbone support structure comprises front legs and rear legs, the rear legs are telescopic, the rear legs comprise an outer tube and an inner tube movably and telescopically connected with the outer tube, the top end of the inner tube extends from the upper end of the outer tube and is directly or indirectly pivotally connected with the upper part of the front leg, the inner tube gradually extends into the outer tube during the opening of the folding chair until the lower end of the inner tube is blocked by the limiting structure, and the inner tube exposes an extension section between the upper end of the inner tube and the upper end of the outer tube when the lower end of the inner tube is blocked by the limiting structure, which is used to avoid the fingers being pinched by the upper end of the inner tube and the upper end of the outer tube.

[0006] The limiting structure is hidden, so that the fingers are prevented from being directly touched and pinched, and after the folding chair is fully opened, the upper end of the inner tube and the upper end of the outer tube are still exposed, so that the fingers are prevented from being pinched, the operation is safe, and the technical requirement of preventing the fingers from being pinched by the child is fully met. In addition, the limiting structure is used for limiting the maximum degree of the descending of the inner tube, and can be a step, or a closed surface, or a bundle opening structure, and has the advantages of simple structure.

[0007] In a preferred embodiment, the length of the extension section is greater than or equal to the thickness of the fingers.

[0008] In a preferred embodiment, the middle or lower middle of the outer tube is provided with a necking for forming the limiting structure. The necking is directly used on the outer tube to block the descending of the inner tube, without the need of additionally increasing components, and the structure is simple.

[0009] In a preferred embodiment, the rear legs between the left and right sides of the seat plate are provided with rear leg connecting rods, the end portions of the rear leg connecting rods are inserted into the rear legs, and the portions of the rear leg connecting rods inserted into the rear legs form the limiting structure. The portions of the rear leg connecting rods inserted into the rear legs form the limiting structure, without the need of additionally increasing components, and the strength and stability of the rear leg connecting rods are improved.

[0010] In a preferred embodiment, the portions of the rear leg connecting rods inserted into the rear legs are flat structures. The flat holes are arranged on the outer tube corresponding to the flat end portions, so that the strength of the outer tube is better guaranteed.

[0011] In a preferred embodiment, the front leg is provided with a pivot sleeve, the rear side of the pivot sleeve extends rearward to form a pivot portion, the upper end of the inner tube is movably connected with the pivot portion, the lower end of the front leg is provided with a foot cap, the rear side of the foot cap is upwardly bent to form a convex portion, and after folding, the convex portion of the foot cap abuts against the rear leg, and the front leg and the rear leg are separated to allow the fingers to freely enter and exit. The pivot portion is formed by the rear side of the pivot sleeve extending rearward, so that the distance between the upper end of the inner tube and the front leg is pulled apart, and in addition, the convex portion is formed by the rear side of the foot cap upwardly bent, so that the distance between the lower end of the front leg and the rear leg is also pulled apart in the folded state. Therefore, the fingers are prevented from being pinched between the front leg and the rear leg in the use or the folded state.

[0012] In a preferred embodiment, the upper end of the inner tube is a flat joint, and the middle portion of the pivot portion is correspondingly provided with a slot.

[0013] In a preferred embodiment, a pivot shaft is arranged between the front legs and the seat side, the middle part of the seat side is pivotally connected to the pivot shaft, and the front legs and the seat side are free for fingers to pass in and out; a connecting piece is arranged between the rear legs and the seat side, the rear part of the seat side is pivotally connected to the connecting piece, and the rear legs and the seat side are free for fingers to pass in and out. The pivot shaft pulls apart the seat and the front legs, and the connecting piece pulls apart the seat and the rear legs, so that even if a child's fingers are placed on the seat side, the fingers will not be pinched.

[0014] In a preferred embodiment, the connecting piece is in the shape of a U. The U-shaped connecting piece can make the front and rear legs close to each other after the folding chair is folded, so as to minimize the thickness occupied in the folded state.

[0015] In a preferred embodiment, a front leg connecting rod is arranged between the two front legs, the upper ends of the two front legs are connected by a horizontal rod, and a backrest plate is further included, the backrest plate is connected to the upper ends of the two front legs and the horizontal rod, and the backrest plate and the seat plate are both plastic absorption plates. BRIEF DESCRIPTION OF DRAWINGS

[0016] The application will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 A perspective view of the folding chair is shown.

[0018] Figure 2 A partial perspective view of the folding chair is shown.

[0019] Figure 3 A perspective view of Figure 2 is shown.

[0020] Figure 4 A perspective view of Figure 1 is shown.

[0021] Figure 5 A perspective view of Figure 1 is shown.

[0022] Figure 6 A perspective view of Figure 1 is shown.

[0023] Figure 7 A perspective view of Figure 1 is shown.

[0024] Figure 8 A perspective view of Figure 1 is shown. Figure 7 .

[0025] Figure 9 illustrated Figure 1 illustrated DETAILED DESCRIPTION

[0026] Please refer to Figures 1 to 9 , the folding chair, including the seat plate 10 and the herringbone support structure symmetrically arranged on the left and right sides of the seat plate, the herringbone support structure is used for supporting the seat plate 10. The seat plate 10 is pivotally connected with the herringbone support structure, and the herringbone support structure includes front legs 20 and rear legs 30, and the rear legs 30 are telescopic, that is, the length can be changed. The rear leg 30 includes an outer tube 31 and an inner tube 32 movably and telescopically inserted into the outer tube, and the top end of the inner tube 32 extends from the upper end of the outer tube 31 and is directly or indirectly pivotally connected with the upper part of the front leg 20. The inner tube 32 is gradually inserted into the outer tube 31 during the opening of the folding chair until the lower end of the inner tube is blocked by the limiting structure 33, that is, the rear leg 30 is in the elongated state when the folding chair is folded, and is in the contracted state when the folding chair is opened. When the inner tube 32 is blocked by the limiting structure 33, that is, when the folding chair is opened, the inner tube 32 exposes an extension section 322 between the upper end of the inner tube and the upper end of the outer tube, and the extension section 322 is used to avoid the fingers being pinched by the upper end of the inner tube and the upper end of the outer tube. That is, if the folding chair is to be opened when it is in the folded state, even if the fingers are held at the position of the extension section 32, the inner tube 32 gradually extends into the outer tube 31 when the folding chair is opened, and finally the lower end of the inner tube is blocked by the limiting structure 33. At this time, the extension section 322 of the inner tube is still exposed outside, although the distance between the upper end of the inner tube and the upper end of the outer tube is becoming smaller during the opening of the folding chair, but because of the existence of the extension section 322, the fingers will not be pinched by the upper end of the inner tube and the upper end of the outer tube.

[0027] Preferably, the length of the extension section 322 is at least greater than the thickness of the fingers, or is substantially the same as the thickness of the fingers. Substantially the same as the thickness of the fingers can be slightly smaller than the thickness of the fingers, although the fingers are slightly squeezed by the upper end of the inner tube and the upper end of the outer tube, but the human body muscle has elasticity, and slight deformation will not appear pinching.

[0028] Preferably, the rear legs 30 between the left and right sides of the seat plate are provided with rear leg connecting rods 34, the end portions of the rear leg connecting rods 34 are inserted into the outer tubes 31 of the rear legs 30, and the portions of the rear leg connecting rods 34 inserted into the outer tubes 31 of the rear legs form the limiting structures 33. Therefore, the maximum degree of the inner tube 32 being retracted into the outer tube 31 is that the lower end of the inner tube abuts against the limiting structure 33, at this time, the folding chair just completes the opening action.

[0029] Preferably, the part of the rear leg connecting rod 34 inserted into the rear leg outer tube is a flat structure. It is understood that the rear leg connecting rod 34 can be a pipe in its entirety, as long as the diameter of the rear leg connecting rod 34 is smaller than that of the outer tube 31. It is understood that the step surface or bottleneck structure in the outer tube 31 can be formed by directly adopting a necked-in manner, which can also be used to block the inner tube, or the inner cavity of the outer tube is a stepped hole structure, etc.

[0030] Preferably, the front leg 20 is provided with a pivot sleeve 40, the rear side of the pivot sleeve 40 extends rearward to form a pivot part 42, and the upper end of the inner tube 32 is movably hinged with the pivot part 42; the lower end of the front leg 20 is sleeved with a foot cap 50, and the rear side of the foot cap 50 is tilted rearward to form a convex part 52. After folding, the convex part 52 of the foot cap abuts against the outer tube of the rear leg 30, and the top end of the rear leg is pulled away from the front leg by the pivot part 42, so that the space between the front leg 20 and the rear leg 30 is free for fingers to enter and exit.

[0031] Preferably, the upper end of the inner tube 32 is a flat joint, and the middle part of the pivot part 42 is correspondingly provided with a slot.

[0032] Preferably, a pivot shaft 22 is arranged between the inner side of the front leg 20 and the seat side 10, the middle part of the side edge of the seat plate 10 is rotatably connected with the pivot shaft 22, and the space between the front leg 20 and the side edge of the seat plate 10 is free for fingers to enter and exit; a connecting piece 36 is arranged between the rear leg 30 and the side edge of the seat plate 10, and the rear part of the side edge of the seat plate 10 is rotatably connected with the connecting piece 36, and the space between the rear leg 30 and the side edge of the seat plate 10 is free for fingers to enter and exit.

[0033] Preferably, the connecting piece 34 is in the shape of a

[0034] Preferably, a front leg connecting rod 24 is arranged between the two front legs 20, the upper ends of the two front legs are connected together by a cross rod 26, and a backrest plate 60 is further included, the backrest plate is connected with the upper ends of the two front legs and the cross rod, and the backrest plate and the seat plate are both plastic suction plates.

[0035] When folding, the front end of the seat plate 10 is lifted upward, as Figures 6-9 the seat plate 10 rotates clockwise around the pivot shaft 22, driving the front leg 20 and the rear leg 30 to approach each other, and because the pivot point of the connecting piece 36 and the seat plate 10 is constantly descending, the rear leg is elongated during the folding process, and finally the convex part 52 of the foot cap 50 abuts against the rear leg 30. In the unfolded state of the folding chair, the exposed length of the inner tube 32 is the shortest, and in the folded state, the exposed length of the inner tube 32 is the longest, so if the folding chair is unfolded from the folded state, the exposed part of the inner tube 32 is always decreasing until the inner tube is stopped by the limiting structure, and the exposed part of the inner tube finally reaches the minimum to form the extension section.

[0036] The above merely describes preferred embodiments of the present application, and therefore cannot limit the scope of the present application, i.e. equivalent changes and modifications made according to the patent scope and content of the present application should still fall within the scope of the present application.

Claims

1. A folding chair comprising a seat plate and a herringbone support structure symmetrically arranged on the left and right sides of the seat plate, the seat plate being pivotally connected with the herringbone support structure, the herringbone support structure comprising front legs and rear legs, the rear legs being telescopic, the rear legs comprising an outer tube and an inner tube telescopically connected with the outer tube, the top end of the inner tube extending from the upper end of the outer tube and being directly or indirectly pivotally connected with the upper part of the front legs, characterized in that: The outer tube is internally provided with a limiting structure, and the inner tube gradually extends into the outer tube during unfolding of the folding chair until the lower end of the inner tube is blocked by the limiting structure. When the limiting structure blocks the lower end of the inner tube, an extension section is exposed between the upper end of the inner tube and the upper end of the outer tube to avoid finger injury caused by the upper end of the inner tube and the upper end of the outer tube.

2. The folding chair of claim 1, wherein: The length of the extension section is at least greater than the thickness of the finger or is substantially equal to the thickness of the finger.

3. The folding chair of claim 1, wherein: The middle or lower-middle part of the outer tube is provided with a necked part for forming the limiting structure.

4. The folding chair of claim 1, wherein: A rear leg connecting rod is arranged between the rear legs on the left and right sides of the seat plate, the end of the rear leg connecting rod is inserted into the rear legs, and the part of the rear leg connecting rod inserted into the rear legs forms the limiting structure.

5. The folding chair of claim 4, wherein: The part of the rear leg connecting rod inserted into the rear legs is a flat structure.

6. The folding chair of any one of claims 1 to 5, wherein: A pivot connecting sleeve is arranged on the front leg, the rear side of the pivot connecting sleeve extends rearward to form a pivot part, the upper end of the inner tube is movably connected with the pivot part, a foot cap is arranged on the lower end of the front leg, the rear side of the foot cap is upwardly bent to form a convex part, and after folding, the convex part of the foot cap abuts against the rear leg, and the front leg and the rear leg are free for fingers to enter and exit.

7. The folding chair of claim 6, wherein: The upper end of the inner tube is a flat joint, and a slot is arranged in the middle of the pivot part.

8. The folding chair of claim 6, wherein: A pivot shaft is arranged between the inner side of the front leg and the seat side, the middle of the side edge of the seat plate is rotatably connected with the pivot shaft, the front leg and the side edge of the seat plate are free for fingers to enter and exit, a connecting piece is arranged between the rear leg and the side edge of the seat plate, the rear part of the side edge of the seat plate is rotatably connected with the connecting piece, and the rear leg and the side edge of the seat plate are free for fingers to enter and exit.

9. The folding chair of claim 8, wherein: The connecting piece is in a shape of.

10. The folding chair of claim 8, wherein: A front leg connecting rod is arranged between the two front legs, the upper ends of the two front legs are connected by a horizontal rod, a backrest plate is further arranged, the backrest plate is connected with the upper ends of the two front legs and the horizontal rod, and the backrest plate and the seat plate are both plastic absorption plates.

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