CN221980388U - A folding chair frame - Google Patents

Abstract

A folding chair frame comprises a cross supporting rod set pivoted between the front part and the rear part of two supporting frames, wherein the supporting frames respectively comprise a rear supporting rod, an inclined supporting rod, a sitting rod, a grab bar and a handrail supporting rod, the upper ends of the inclined supporting rods are pivoted on a rear connecting seat, the lower ends of the handrail supporting rods are slidably connected on the inclined supporting rod, the sitting rod is pivoted on the rear supporting rod and the inclined supporting rod, the grab bar is connected between the rear supporting rod and the handrail supporting rod, a backrest rod is pivoted on the rear connecting seat, an elastically telescopic positioning column and a push button capable of pushing the positioning column to retract are arranged at the lower ends of the backrest rod, a socket is arranged at the position of the near rear end of the sitting rod, a socket is arranged in the socket, the end heads at the bottoms of the positioning column extend out of the bottom end of the backrest rod and are positioned in the socket when the positioning column resets, and the end heads of the positioning column retract inwards under the push button push to retract back the socket to be separated. The utility model is matched with the backrest rod which is stably supported and is leaning and comfortable, and can be matched with the chair frame to realize integral unfolding or folding.

Description

Folding chair frame

Technical Field

The present utility model relates to chairs, and more particularly to a folding chair 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, a backrest is also arranged in a plurality of folding chairs, and a backrest rod and backrest cloth which can be unfolded and folded simultaneously are added in the chair frame.

For the folding chairs with backrest rods, most of the backrest is in a fixed form, and the backrest rods are matched with the chair frame to be unfolded and folded integrally. In some common folding chairs with backrests, the chair frame comprises two backrest rods positioned at the rear side, the backrest rods are generally upright rod bodies, the height of the rod bodies is higher than that of a sitting rod or an armrest of the chair frame, the lower sections of the backrest rods form rear supports of the chair frame, and the upper sections of the backrest rods form backrests. In such a chair frame, because the backrest rod is fixed, certain leaning action can not be realized according to the use requirement when sitting, and the folding chair is convenient to fold, but is uncomfortable to use, so that a human body can not be well rested and relaxed, and the higher requirement can not be met on the comfort. In some folding chairs, in order to incline the backrest part, the upper section of the backrest rod needs to be separately formed into a rod piece and pivoted at the rear end of the seat rod of the chair frame, so that the linkage relation of the backrest rod needs to be changed (the backrest rod can be matched and folded), the structure is complicated, and in the use process, the backrest of a user is unstable, and the use experience is greatly influenced.

Disclosure of utility model

The utility model aims to provide a folding chair frame, wherein a backrest rod which is stable in support and comfortable to lean against is matched in the chair frame, the backrest rod is easy to operate, and the chair frame can be matched to realize integral unfolding or folding.

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

The utility model provides a folding chair frame, including bilateral symmetry's support frame, still rotatable pin joint has the cross branch group between the front portion and the rear portion of two support frames respectively, each support frame includes back bracing piece respectively, the diagonal brace, the seat pole, the handrail bracing piece, rotatable pin joint in a back connecting seat in upper end of diagonal brace, but the lower extreme sliding connection of handrail bracing piece is on the diagonal brace, the seat pole pin joint is on back bracing piece and diagonal brace simultaneously, the handrail pole is connected between back bracing piece and the handrail bracing piece that is located its place ahead, still be equipped with a back pole, the back pole pin joint is on the back connecting seat and be located seat pole top, the elastic positioning subassembly is installed to the lower extreme of back pole, but elastic positioning subassembly is including a flexible reference column and a push button that can promote the reference column and retract, a socket is installed to the nearly rear end department of seat pole, be equipped with a socket in the socket, the end that stretches out back pole bottom the socket is stretched into when the reference column resets is fixed a position in the socket, the back pole slope location is on the seat pole, the end of reference column is back is retracted inwards under the push button and is deviate from.

Further, the backrest rod is a hollow tube body, the positioning column extends into the lower section of the backrest rod from bottom to top, an upper positioning hole and a positioning groove positioned below the upper positioning hole are formed in the positioning column, a spring is arranged in the positioning groove, the lower positioning hole is positioned above the spring, the push button is sleeved on the lower section of the backrest rod, an upper pin penetrates through the push button and the upper positioning hole at the same time, a lower pin penetrates through the backrest rod and the lower positioning hole, the push button is pushed upwards to drive the positioning column to move upwards, and the spring in the positioning groove is compressed by the lower pin when the positioning column moves upwards.

Further, side strip holes through which upper pins can pass are symmetrically formed in the lower section of the backrest rod, the upper pins retract downwards after moving upwards in the side strip holes, positioning grooves are formed in the length direction of the positioning columns, and the springs are longitudinally inserted and limited in the positioning grooves.

Further, the end of the positioning column extends out of the bottom end of the backrest rod in a spring reset state, the end of the positioning column forms an inclined transition surface with low front and high rear, in the socket, a blocking edge capable of blocking the backrest rod is convexly arranged on the periphery of the socket, and a notch capable of enabling the backrest rod to lean backwards is formed at the front end of the blocking edge.

Further, an inner sleeve is connected in the rear supporting rod, the rear connecting seat is connected with the upper end of the inner sleeve, and the inner sleeve extends upwards from the rear supporting rod when the folding chair frame is folded.

Further, the front end of the grab rail is pivoted at the upper end of the grab rail supporting rod, the rear end of the grab rail is pivoted on a supporting piece, and the supporting piece is connected at the near upper end of the rear supporting rod and is positioned below the rear connecting seat.

Further, a group of rear cross strut groups are pivoted between the two rear support rods, and the upper ends of the two rear struts in the rear cross strut groups are respectively pivoted to the rear connecting seat; the front ends of the two diagonal braces are pivoted with a group of front cross brace rod groups, the upper ends of the two front brace rods in the front cross brace rod groups are respectively pivoted on a front connecting seat, the front connecting seat is connected on the armrest support rod, and the front ends of the sitting bars are arranged on the front connecting seat.

Further, a sliding block capable of sliding on the diagonal brace is arranged at the lower end of the diagonal brace and located above the lower pivot point of the crossed strut group, a U-shaped block is arranged on the sliding block, and the lower end of the handrail supporting rod is pivoted in the U-shaped block.

Further, the upper end of the armrest supporting rod is provided with an outwards bent bending part, the bending part is positioned above the front connecting seat, the upper section of the backrest rod is positioned above the rear connecting seat, and a section of straight section positioned at the upper part is formed in the upper section of the backrest rod after bending.

By adopting the structure, the backrest rod which can be stably supported and is leaning on and comfortable is matched in the chair frame of the folding chair frame, so that the user experience is greatly improved, the backrest rod is supported in the chair frame through the elastic positioning component to be positioned, and the positioning is released when the chair frame is folded, so that the integral folding of the chair frame is not influenced, the operation is simple, the integral structure of the chair frame is stable, the integral unfolding or folding can be realized, and the use is convenient.

Drawings

Fig. 1 is a schematic perspective view of the present utility model (backrest bar positioning support state);

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic perspective view of the present utility model (back bar unlocked);

FIG. 4 is a partial enlarged view at B in FIG. 3;

FIG. 5 is a schematic view of the structure of the elastic positioning assembly and the socket according to the present utility model;

Fig. 6 is a schematic structural view of the rear support bar in the folded 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.

Referring to fig. 1 to 4, the utility model discloses a folding chair frame, which comprises left and right symmetrical supporting frames, wherein crossed supporting rod groups are rotatably pivoted between the front parts and the rear parts of the two supporting frames, and each supporting frame comprises a rear supporting rod 1, an inclined supporting rod 2, a sitting rod 3, a handrail rod 4 and a handrail supporting rod 5. The rear support bar 1 serves only as a rear support and is no longer extended upward as an upright backrest bar. The upper end of the diagonal brace 2 is rotatably pivoted on a rear connecting seat 61, the lower end of the handrail support rod 5 is slidably connected on the diagonal brace 2, the sitting rod 3 is simultaneously pivoted on the rear support rod 1 and the diagonal brace 2, and the handrail rod 4 is connected between the rear support rod 1 and the handrail support rod 5 positioned in front of the rear support rod 1. A group of rear cross strut groups 11 are pivoted between the two rear support rods 1, and the upper ends of the two rear struts 111 in the rear cross strut groups 11 are respectively pivoted to the rear connecting seats 61. A group of front cross strut groups 21 are pivoted between the front ends of the two diagonal struts 2, the upper ends of the two front struts 211 in the front cross strut groups are respectively pivoted on a front connecting seat 62, the front connecting seat 62 is connected on the armrest supporting rod 5, and the front ends of the sitting bars 3 are arranged on the front connecting seats 62.

Specifically, the front end of the grab rail 4 is pivotally connected to the upper end of the grab rail 5, the rear end of the grab rail 4 is pivotally connected to a supporting member 41, the supporting member 41 is connected to the upper end of the rear support bar 1, and the supporting member 41 is located below the rear connection seat 61. In order to enable the armrest support rod 4 to be matched with the armrest rod 4 when the chair frame is folded, a sliding block 22 capable of sliding on the inclined support rod 2 is arranged at the lower end of the inclined support rod 2, the sliding block 22 is positioned above the lower pivot point of the front support rod 211 in the front cross support rod group, so that the sliding block 22 is not blocked by sliding up and down, a U-shaped block 221 is arranged on the sliding block 22, and the lower end of the armrest support rod 5 is pivoted in the U-shaped block 221. Meanwhile, a bending part 51 which bends outwards can be formed at the upper end of the armrest supporting rod 5 and is positioned above the front connecting seat 62, so that the armrest supporting rod 5 can be positioned at the outer side of the seat part, and the armrest supporting rod is convenient for a user to put up hands when sitting and accords with the ergonomic design.

In order to fold the chair frame integrally into a small volume, as shown in fig. 6, the rear support rod 1 is connected with an inner sleeve 12, a rear connecting seat 61 is connected to the upper end of the inner sleeve 12, and the inner sleeve 12 extends upwards from the rear support rod 1 when the folding chair frame is folded to cooperate with the combination of the rear cross support rod group 11.

The main improvement of the utility model is that a backrest rod 7 is also arranged, the backrest rod 7 is pivoted on the rear connecting seat 61 and is positioned above the sitting rod 3, and the lower end of the backrest rod 7 is provided with an elastic positioning component. The elastic positioning assembly comprises a positioning column 81 which can stretch out and draw back elastically and a push button 82 which can push the positioning column to retract, meanwhile, a socket 31 is arranged at the near rear end of the seat rod 3, a socket 311 with an upward opening is arranged in the socket 31, the positioning column 81 can stretch out and draw back (compressed inwards and reset to stretch out), an end 810 at the bottom of the positioning column 81 stretches out of the bottom end of the backrest rod 7 and stretches into the socket 311 to be positioned when the positioning column 81 resets, the backrest rod 7 can be positioned on the seat rod 3 in an inclined mode to form a backrest at the moment, when the chair frame needs to be folded, the push button 82 can be pushed upwards, the end 810 of the positioning column 81 can be pushed by the push button 82 to retract inwards and then is separated from the socket 311, and therefore supporting positioning of the backrest rod 7 in use is achieved, and positioning is released when the chair frame is folded. The upper section of the backrest rod 7 can be bent to form a straight section 71 positioned at the upper part, so that the upper section of the backrest rod 7 can be better abutted against the shoulder and neck of a human body, and the human body engineering is more accordant.

Specifically, referring to fig. 2, 4 and 5, the backrest rod 7 is a hollow tube, the positioning column 81 extends into the lower section of the backrest rod 7 from bottom to top, an upper positioning hole 811 and a positioning groove 812 below the upper positioning hole are provided in the positioning column 81, a spring 83 is provided in the positioning groove 812, and a lower positioning hole 813 is also provided in the positioning groove 812 above the spring 83. When in installation, the push button 82 is sleeved on the lower section of the backrest rod 7, an upper pin 91 passes through the push button 82 and the upper positioning hole 811 at the same time, a lower pin 92 passes through the backrest rod 7 and the lower positioning hole 813, the push button 82 is pushed upwards to drive the positioning column 81 to move upwards, and the spring 83 in the positioning groove 812 is compressed by the lower pin 92 when the positioning column 81 moves upwards and is reset after the push button 82 is released. The push button 82 is provided with two opposite positioning holes 821 on the peripheral surface, and the common pin 91 passes through and is positioned. The push button 82 may also be provided with a tab 822 that may be conveniently pushed up by the hand. Side strip holes 72 (as shown in fig. 2 or 4) through which the upper pins 91 pass are symmetrically provided on the lower section of the backrest rod 7, and the side strip holes 72 are provided along the length direction of the backrest rod, and the upper pins 91 can retract downward after moving upward in the side strip holes 72. In the positioning column 81, the positioning groove 812 is arranged along the length direction of the positioning column 81, and the spring 83 is longitudinally inserted and limited in the positioning groove 812. As shown in fig. 4, the end 810 of the positioning post 81 may extend out of the bottom end of the backrest rod 7 in the reset state of the spring 83, the end 810 of the positioning post 81 may form an inclined transition surface with a low front and a high rear, and form an arc surface, and when the bottom of the backrest rod 7 needs to be positioned, the end 810 may slide into the socket 311 of the socket 31.

Meanwhile, as shown in fig. 2 and 4, in the socket 31, a blocking edge 312 capable of blocking the backrest rod 7 is convexly arranged at the periphery of the socket 311, and the bottom of the backrest rod 7 can be limited and blocked in the socket 31 to form stable positioning. The blocking edge 312 may be formed in a U shape, and a notch 313 is formed at the front end of the blocking edge for the backrest rod 7 to lean backward.

When the folding chair frame is used, along with the unfolding of the two supporting frames in the chair frame, the rear cross supporting rod group 11 and the front cross supporting rod group 21 are unfolded, the handrail supporting rods 5 move downwards, the opening of the handrail rods 4 is realized when the two side chair frames are unfolded, the sitting rods 3 are unfolded, after the chair frame is unfolded, for example, in the state shown in fig. 3, when the backrest rods 7 are required to be supported and positioned, only the bottoms of the backrest rods 7 are required to be moved backwards and then inserted into the sockets 31, and the ends 810 of the positioning columns 81 are sprung up and slide into the sockets 311 to be clamped and positioned, so that the two backrest rods 7 are supported in a positioning manner, and the stable support and the comfortable leaning of the backrest rods 7 are realized as shown in fig. 1. When the folding chair frame needs to be folded, the front and rear sets of crossed strut groups are collected and leaned, the upper ends of the two rear struts 111 in the rear crossed strut groups drive the rear connecting seat 61 to move upwards together with the inner sleeve 12, when the upper ends of the two front struts 211 in the front crossed strut groups move upwards, the sliding blocks 22 at the bottom ends of the handrail support rods 5 slide upwards on the diagonal struts 2, the upward movement of the handrail support rods 5 drives the front ends of the handrail rods 4 to lift up, so that the folding is realized, and finally, the collection and leaning (not shown in the figure) of the whole folding chair frame are completed, so that the folding chair frame with the minimum volume is realized. When the folding chair frame is used, the chair frame is movably connected with chair cloth (not shown in the figure), the chair cloth can comprise sitting cloth and backrest cloth, a sitting cloth forming seat part is connected between the two sitting rods 3, a backrest cloth forming backrest part is connected between the two backrest rods 7, the sitting cloth and the backrest cloth can be separated or connected into a whole, and the chair cloth can be folded and unfolded along with the chair frame.

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 (9)

1. The utility model provides a folding chair frame, including bilateral symmetry's support frame, still rotatable pin joint has cross strut group between the front portion and the rear portion of two support frames respectively, each support frame includes back bracing piece, diagonal brace, sits pole, handrail bracing piece respectively, the rotatable pin joint of upper end of diagonal brace is on a back connecting seat, but the lower extreme sliding connection of handrail bracing piece is on diagonal brace, sits the pole pin joint simultaneously on back bracing piece and diagonal brace, the handrail pole is connected behind between bracing piece and the handrail bracing piece that is located its the place ahead, its characterized in that: the back rod is pivoted on the rear connecting seat and is positioned above the sitting rod, the lower end of the back rod is provided with an elastic positioning component, the elastic positioning component comprises a positioning column which can stretch out and draw back and a push button which can push the positioning column to retract, a socket is arranged at the near rear end of the sitting rod, a socket is arranged in the socket, the end head at the bottom of the positioning column stretches out of the bottom end of the back rod and stretches into the socket to be positioned when the positioning column resets, the back rod is obliquely positioned on the sitting rod, and the end head of the positioning column is pulled out of the socket after being retracted inwards under the push of the push button.

2. A folding chair as claimed in claim 1, wherein: the backrest rod is a hollow tube body, the positioning column extends into the lower section of the backrest rod from bottom to top, an upper positioning hole and a positioning groove positioned below the upper positioning hole are formed in the positioning column, a spring is arranged in the positioning groove, the lower positioning hole is positioned above the spring, a push button is sleeved on the lower section of the backrest rod, an upper pin penetrates through the push button and the upper positioning hole at the same time, a lower pin penetrates through the backrest rod and the lower positioning hole, the push button is pushed upwards to drive the positioning column to move upwards, and the spring in the positioning groove is compressed by the lower pin when the positioning column moves upwards.

3. A folding chair as claimed in claim 2, wherein: the lower section of the backrest rod is symmetrically provided with side strip holes through which upper pins can pass, the upper pins retract downwards after moving upwards in the side strip holes, the positioning grooves are arranged along the length direction of the positioning columns, and the springs are longitudinally inserted and limited in the positioning grooves.

4. A folding chair as claimed in any one of claims 1 to 3 wherein: the end of the positioning column stretches out of the bottom end of the backrest rod in a spring reset state, the end of the positioning column forms an inclined transition surface with a low front part and a high rear part, a blocking edge capable of blocking the backrest rod is convexly arranged on the periphery of the socket, and a notch capable of enabling the backrest rod to lean backwards is formed at the front end of the blocking edge.

5. A folding chair as claimed in claim 1, wherein: the rear supporting rod is connected with an inner sleeve, the rear connecting seat is connected with the upper end of the inner sleeve, and the inner sleeve extends upwards from the rear supporting rod when the folding chair frame is folded.

6. A folding chair as claimed in claim 1, wherein: the front end of the grab rail is pivoted at the upper end of the grab rail supporting rod, the rear end of the grab rail is pivoted on a supporting piece, and the supporting piece is connected at the near upper end of the rear supporting rod and is positioned below the rear connecting seat.

7. A folding chair as claimed in claim 1, wherein: a group of rear cross strut groups are pivoted between the two rear support rods, and the upper ends of the two rear struts in the rear cross strut groups are respectively pivoted to the rear connecting seat; the front ends of the two diagonal braces are pivoted with a group of front cross brace rod groups, the upper ends of the two front brace rods in the front cross brace rod groups are respectively pivoted on a front connecting seat, the front connecting seat is connected on the armrest support rod, and the front ends of the sitting bars are arranged on the front connecting seat.

8. A folding chair as claimed in claim 1, wherein: the lower end of the diagonal brace is provided with a sliding block which can slide on the diagonal brace, the sliding block is positioned above the lower pivot point in the crossed supporting rod group, the sliding block is provided with a U-shaped block, and the lower end of the handrail supporting rod is pivoted in the U-shaped block.

9. A folding chair as claimed in claim 1, wherein: the upper end of the armrest supporting rod is provided with an outwards bent part, the bent part is positioned above the front connecting seat, the upper section of the backrest rod is positioned above the rear connecting seat, and a section of straight section positioned at the upper part is formed in the upper section of the backrest rod after bending.