CN220655170U - Folding chair frame - Google Patents

Abstract

A folding chair frame comprises side brackets which are positioned on two side surfaces and are symmetrical, a front cross supporting rod group and a rear cross supporting rod group which are positioned on a front elevation and a rear elevation, wherein the front cross supporting rod group and the rear cross supporting rod group comprise two crossed front supporting rods and rear supporting rods, and each side bracket comprises a backrest rod, a handrail rod and a sitting rod; the back rest rod is supported in a backward inclined way, the front part of the seat rod is supported on a supporting seat arranged at the front part of the back rest rod, the front end of a connecting sheet is pivoted on the supporting seat, the rear end of the connecting sheet is pivoted on the seat rod, the rear part of the back rest rod is pivoted with a sliding sleeve, the upper part of the back rest rod penetrates out of the sliding sleeve and the sliding sleeve can slide on the back rest rod, and the lower end of the back rest rod is pivoted at the rear part of the seat rod; the upper end and the lower end of the front supporting rod are respectively pivoted at the front end of the sitting rod and the front end of the grab rail in a rotatable manner, and the upper end and the lower end of the rear supporting rod are respectively pivoted at the rear end of the grab rail and the rear end of the sitting rod in a rotatable manner. The utility model has simple structure and can solve the problem that the back plastic connecting piece is easy to twist and deform.

Description

Folding chair frame

Technical Field

The utility model relates to the field of seats, in particular to a folding seat frame.

Background

The folding chair has the characteristics of portability and foldability, is convenient to carry and saves space, and is widely applied to various public places or is convenient to carry as an outdoor chair. The common folding chairs comprise a chair frame and chair cloth connected with the chair frame, the chair frame can be folded integrally, and a backrest and a handrail are arranged in a plurality of folding chairs.

For folding chairs with a backrest in the chair frame, the chair frame is matched with cross struts to form front and back supports, the two side surfaces of the folding chair are provided with sitting bars or front support rods for supporting the sitting bars, and the folding chairs are also matched with grab bars. In order to achieve the integrated folding, the backrest, the cross struts and the other rod piece form linkage, as shown in fig. 1, the folding chair comprises a front cross strut 1', a rear cross strut 2', a backrest rod 3', seat rods 4' and a grab rail 5 'at two sides, a plastic connecting piece 6' is arranged at the rear of the chair frame, the upper ends of the cross struts 2 'at the rear are pivoted on the plastic connecting piece 6', the rear ends of the grab rail 5 'are pivoted to the other ends of the plastic connecting piece 6', the backrest rod 3 'slides at the opening at the middle part of the plastic connecting piece 6', and the plastic connecting piece 6 'bears the force of three rod pieces in different directions, so that the plastic connecting piece 6' is easy to be severely distorted and deformed after being used, the chair is easy to damage, the service life is reduced, the support stability of the chair frame is poor, and the use experience is affected.

For example, the back-rest folding chair support frame of chinese patent No. CN201020553546.7, the back of the grab rail is hinged with the first sliding sleeve 10 which is slidably fitted over the back-rest bar 4, the two ends of the upper part of the back transverse support frame 7 are respectively hinged with the first sliding sleeves 10 which are respectively sleeved on the back-rest bar 4 on two sides, and the first sliding sleeve 10 is also easy to generate torsion deformation due to stress problem. Or a folding chair and a folding mechanism thereof according to chinese patent No. CN201721435996.4, in the folding chair, the upper end of the first cross rod 3 and the upper end of the rear rod 12 are hinged on the second sliding sleeve 6, the second sliding sleeve 6 is slidably sleeved on the backrest rod 5, and the second sliding sleeve 6 also has the problem of easy deformation.

Therefore, the present designer is designed to solve many drawbacks and inconveniences caused by the imperfection of the existing folding chairs in structural design, and to develop the present creation by actively researching and modifying trial.

Disclosure of Invention

The utility model aims to provide a folding chair frame which is simple in structure, can solve the problem that a back plastic connecting piece is easy to twist and deform, improves the use experience, and is more firm and durable.

In order to achieve the above object, the solution of the present utility model is:

the folding chair frame comprises side brackets which are positioned on two side surfaces and are symmetrical, a front cross supporting rod group and a rear cross supporting rod group which are positioned on a front elevation and a rear elevation, wherein the front cross supporting rod group comprises two crossed front supporting rods, the rear cross supporting rod group comprises two crossed rear supporting rods, and each side bracket comprises a backrest rod, a handrail rod and a sitting rod; the back rest rod is supported in a backward inclined way, the front part of the seat rod is supported on a supporting seat arranged at the front part of the back rest rod, the front end of a long connecting sheet is pivoted on the supporting seat, the rear end of the connecting sheet is pivoted on the seat rod, the rear part of the back rest rod is pivoted with a sliding sleeve, the upper part of the back rest rod penetrates out of the sliding sleeve and the sliding sleeve can slide on the back rest rod, and the lower end of the back rest rod is pivoted at the rear part of the seat rod; the upper end and the lower end of the front supporting rod are respectively pivoted at the front end of the sitting rod and the front end of the grab rail in a rotatable manner, and the upper end and the lower end of the rear supporting rod are respectively pivoted at the rear end of the grab rail and the rear end of the sitting rod in a rotatable manner.

Further, a supporting groove capable of supporting the sitting rod is formed in the middle of the supporting seat, and the front end of the connecting sheet is pivoted on the inner side face of the supporting seat.

Further, the rear section of the sitting rod is bent or folded downwards to form a rear leg supporting rod, the lower end of the backrest rod is pivoted on the rear leg supporting rod, and the rear part of the connecting sheet is pivoted at the front part of the rear leg supporting rod.

Further, the front ends of the rear leg support rods in the seat rod can form a seat support rod, the upper ends of the front support rods are rotatably pivoted to the front parts of the seat support rods, and the seat support rods also form an extension section outside the pivoted part of the upper ends of the front support rods.

Further, the upper end of the rear supporting rod and the rear end of the corresponding grab bar are pivoted to a connecting piece, and a pivoting notch for pivoting the end part of the rear supporting rod and the end part of the grab bar is formed in the connecting piece, and the two pivoting notches are vertical.

Further, a through hole for the backrest rod to pass through is formed in the middle of the sliding sleeve, and a clamping part or a limiting part is fixedly arranged on the backrest rod below the sliding sleeve.

Further, the front end of the grab rail is pivoted on a front foot seat, the rear end of the sitting bar is pivoted on a rear foot seat, and the lower ends of the front supporting rod and the rear supporting rod are respectively pivoted on the front foot seat and the rear foot seat.

Further, the grab bar forms an arcuate bar and the backrest bar is inclined rearwardly when deployed.

After the structure is adopted, the folding chair frame is simple in integral structure and convenient to integrally unfold and fold, the back support rod is connected with the grab rail in a sliding sleeve connected to the upper part of the grab rail, the back support rod is connected with the grab rail in a sliding sleeve, and the back cross support rod and the grab rail are mutually independent and staggered with the sliding sleeve, so that the problem that three rod pieces are connected to the same back plastic connecting piece and are easy to twist and deform is avoided, the use experience is improved, and the chair frame is firm and durable.

Drawings

FIG. 1 is a schematic view of a conventional folding chair;

FIG. 2 is a schematic view of the structure of the utility model in an unfolded state;

fig. 3 is a schematic view of the folding state of the present utility model.

Detailed Description

In order to further explain the technical scheme of the utility model, the utility model is explained in detail by specific examples.

As shown in fig. 2 and 3, a folding chair frame includes symmetrical side brackets on two sides, a front cross strut set and a rear cross strut set on a front elevation and a rear elevation, and a piece of chair cloth (not shown) may be sleeved on the chair frame, and the chair cloth may be sleeved on the chair frame after being unfolded, or may be integrally sleeved and connected to the chair frame, and the chair frame includes a seat cloth and a backrest cloth corresponding to the unfolding form of the chair frame, which is the prior art and will not be described in detail herein. In the chair frame, the front cross support rod group 1 comprises two crossed front support rods 11, the rear cross support rod group 2 comprises two crossed rear support rods 21, and the folding of the side supports at two sides can be driven by the front cross support rod group 1 and the rear cross support rod group 2.

Each side bracket comprises a backrest rod 3, a grab bar 4 and a sitting rod 5, wherein the grab bar 4 is supported in a backward inclined way, and is supported on the side surface of the chair frame in an inclined way when unfolded, and the grab bar 4 can form an arc-shaped rod. The sitting rod 5 is arranged below the grab rail 4, the front part of the sitting rod 5 is supported on a supporting seat 6 arranged at the front part of the grab rail 4, the front end of a long connecting sheet 7 is pivoted on the supporting seat 6, and the rear end of the connecting sheet 7 is pivoted on the sitting rod 5. The back rest rod 4 is pivoted with a sliding sleeve 41 at the rear part, the upper part of the back rest rod 3 penetrates out of the sliding sleeve 41, the sliding sleeve 41 can slide on the back rest rod 3, the lower end of the back rest rod 3 is pivoted at the rear part of the sitting rod 5, and the back rest rod 3 is connected between the sitting rod 5 and the back rest rod 4. The backrest rod 3 may be slightly inclined backward when unfolded to improve the comfort of sitting and leaning. In the two crossed strut groups, the upper end of the front strut 11 is rotatably pivoted at the front end of the sitting rod 5, and the lower end of the front strut 11 is rotatably pivoted at the front end (namely the lower end) of the grab rail 4; the upper end of the rear supporting rod 21 is rotatably pivoted at the rear end (and the upper end) of the grab bar 4, and the lower ends of the rear supporting rod 21 are rotatably pivoted at the rear end of the sitting bar 5 respectively.

Specifically, the rear section of the sitting bar 5 is bent or folded downward to form a rear leg support bar 51, and the lower end of the backrest bar 3 is pivotally connected to the rear leg support bar 51, and the rear leg support bar 51 may form a rear support of the sitting bar 5. The front end of the rear leg supporting rod 51 in the sitting rod 5 can form a sitting portion supporting rod 52, the rear end of the connecting sheet 7 is pivoted at the front of the rear leg supporting rod, the rear end of the connecting sheet 7 can be pivoted on the sitting portion supporting rod 52, the connecting sheet 7 can limit the sitting rod 5 on the inner side of the grab rail 4, and folding of the sitting rod 5 is not affected. The upper end of the front strut 11 is rotatably pivoted to the front part of the seat support rod 52, and the seat support rod 52 forms an extension 521 outside the pivot of the upper end of the front strut 11, and the extension 521 forms an extension of the seat part, so that the seat can be conveniently sleeved on or connected with a seat cloth. The middle part of the supporting seat 6 is provided with a supporting groove 61 for supporting the sitting rod, and the front end of the connecting sheet 7 is pivoted on the inner side surface of the supporting seat 6.

The upper end of the rear supporting rod 21 and the rear end of the corresponding grab bar 4 can be pivoted to a connecting piece 8, and a pivoting notch for pivoting the end of the rear supporting rod and the end of the grab bar is arranged in the connecting piece 8, and the two pivoting notches can be vertical. The upper part of the backrest rod 3 passes through the sliding sleeve 41, a through hole for the backrest rod 3 to pass through is formed in the middle of the sliding sleeve 41, and a blocking part or a limiting part (not shown in the figure) can be fixedly arranged on the backrest rod below the sliding sleeve 41 so as to fix the sliding sleeve 41 not to slide down in the seat supporting state. The connecting piece 8 and the sliding sleeve 41 are mutually independent and staggered, the backrest rod is independently stressed, and the folding of the rear cross supporting rod group 2 can drive the folding of the armrest rod and the backrest rod. Meanwhile, the front end (bottom end) of the grab rail 4 is pivoted on a front foot seat 91, the rear end (bottom end) of the sitting bar 5 is pivoted on a rear foot seat 92, and the lower ends of the front supporting rod 11 and the rear supporting rod 21 are respectively pivoted on the front foot seat 91 and the rear foot seat 92, so that the bottom of the chair frame is firmer.

When the chair is used by combining with figures 2 and 3, after the chair frame is unfolded, the front cross support rod group 1 and the rear cross support rod group 2 are unfolded, the two grab bars 4 are unfolded, the two sitting bars 5 and the backrest bars 3 are also unfolded along with the unfolding, the backrest bars 3 slide downwards relative to the sliding sleeve 41, the front parts of the sitting bars 5 are supported on the supporting seats 6, and the chair frame is unfolded integrally. When the chair frame needs to be folded, the front cross strut group 1 and the rear cross strut group 2 are respectively and intensively folded, the backrest rod 3 moves downwards in the sliding sleeve 41, meanwhile, the seat rod 5 is lifted upwards and folded in the middle, and finally, the chair frame is intensively folded to be the minimum volume, as shown in fig. 3.

The above examples and drawings are not intended to limit the form or form of the present utility model, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present utility model.

Claims (8)

1. The utility model provides a folding chair frame, chair frame is including being located both sides face and being symmetrical side stand, be located preceding cross support group and the back cross support group of preceding facade and back facade, preceding cross support group includes two crisscross preceding branches, back cross support group includes two crisscross back branches, its characterized in that: each side bracket comprises a backrest rod, a grab rail and a sitting rod; the back rest rod is supported in a backward inclined way, the front part of the seat rod is supported on a supporting seat arranged at the front part of the back rest rod, the front end of a long connecting sheet is pivoted on the supporting seat, the rear end of the connecting sheet is pivoted on the seat rod, the rear part of the back rest rod is pivoted with a sliding sleeve, the upper part of the back rest rod penetrates out of the sliding sleeve and the sliding sleeve can slide on the back rest rod, and the lower end of the back rest rod is pivoted at the rear part of the seat rod; the upper end and the lower end of the front supporting rod are respectively pivoted at the front end of the sitting rod and the front end of the grab rail in a rotatable manner, and the upper end and the lower end of the rear supporting rod are respectively pivoted at the rear end of the grab rail and the rear end of the sitting rod in a rotatable manner.

2. A folding chair as claimed in claim 1, wherein: the middle part of the supporting seat is provided with a supporting groove capable of supporting the sitting rod, and the front end of the connecting sheet is pivoted on the inner side surface of the supporting seat.

3. A folding chair as claimed in claim 1, wherein: the back section of the sitting rod is bent or folded downwards to form a back leg supporting rod, the lower end of the backrest rod is pivoted on the back leg supporting rod, and the back of the connecting sheet is pivoted at the front part of the back leg supporting rod.

4. A folding chair as claimed in claim 3, wherein: the front ends of the rear leg supporting rods in the seat rod can form a seat supporting rod, the upper ends of the front supporting rods are rotatably pivoted to the front parts of the seat supporting rods, and the seat supporting rods also form an extension section outside the pivoted part of the upper ends of the front supporting rods.

5. A folding chair as claimed in claim 1, wherein: the upper end of the rear supporting rod and the rear end of the corresponding grab bar are connected to a connecting piece through pin joint, a pin joint notch used for pin joint of the end part of the rear supporting rod and the end part of the grab bar is arranged in the connecting piece, and the two pin joint notches are vertical.

6. A folding chair as claimed in claim 1, wherein: the middle part of the sliding sleeve is provided with a through hole for the backrest rod to pass through, and the backrest rod below the sliding sleeve is fixedly provided with a clamping part or a limiting part.

7. A folding chair as claimed in claim 1, wherein: the front end of the grab rail is pivoted on a front foot seat, the rear end of the sitting bar is pivoted on a rear foot seat, and the lower ends of the front supporting rod and the rear supporting rod are respectively pivoted on the front foot seat and the rear foot seat.

8. A folding chair as claimed in claim 1, wherein: the grab bar forms an arcuate bar and the backrest bar is inclined rearwardly when deployed.