CN217365127U

CN217365127U - Folding chair structure

Info

Publication number: CN217365127U
Application number: CN202121389159.9U
Authority: CN
Inventors: 丁晨; 潘琛璐; 黄忠建
Original assignee: Anji Longwin Furniture Co Ltd
Current assignee: Anji Longwin Furniture Co Ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-09-06
Anticipated expiration: 2031-06-22

Abstract

The utility model relates to the technical field of furniture, specifically be a folding chair structure, including the preceding chair body and the back chair body and be used for the folding deformation platform that switches between two functions of the back of the chair and the desktop body, folding deformation platform including warp the frame and the platen of installing is inlayed in warping the frame, warp frame left side part and be fixed with left back and warp the linking arm, warp frame right side part and be fixed with right back and warp the linking arm, warp frame left side part still articulated have stretch to the chair body and lean on the part of keeping away from warp frame one end with can drag again in the regional swing back and forth in deformation frame left side after the fixing of preceding chair body left side part warp the linking arm before the left side of preceding chair body back-and-forth movement, warp frame right side part still articulated stretch to the chair body and lean on the part of keeping away from warp frame one end with can drag again in the regional swing back and forth in deformation frame right side after the fixing of preceding chair body right side part warp the deformation frame front deformation linking arm back-and-forth movement before the right side of preceding chair body back-and-forth movement warp the linking arm A connecting arm.

Description

Folding chair structure

Technical Field

The utility model relates to the technical field of furniture, in particular to a folding chair structure.

Background

The existing chairs are various in types and more diversified in functions and structures, wherein the folding chair is a chair which is very popular among people in the chairs used in the house, and the existing folding chair is also full of precious.

For example, chinese patent application No. 201220694184.2 discloses a folding chair, which includes a first back lever and a second back lever, which are used to mount a chair back and are arranged in parallel with each other; the first handrail rod is connected with the first backrest rod in a sliding way, and meanwhile, the folding chair can be clamped when in an open state; the second handrail rod is connected with the second back rest rod in a sliding mode, and meanwhile clamping can be achieved when the folding chair is in an open state, wherein the first handrail rod and the second handrail rod are arranged in parallel and have the same structure;

also, for example, the chinese patent with application number 201721907245.8 discloses an aluminum alloy folding chair with adjustable backrest angle, which comprises a main leg of the folding chair, a cup fixing opening, a head rest and a base of the folding chair, an auxiliary inclined strut is arranged above the main supporting leg of the folding chair, a handrail of the folding chair is arranged above the fixing opening of the water cup, a folding chair main body is arranged above the back support rod, the head rest frame is connected above the folding chair main body, a folding chair limiter is arranged below the head leaning frame, an angle adjusting head is arranged below the folding chair limiter, a small hydraulic cylinder is communicated with the lower part of the angle adjusting head, the base of the folding chair is arranged below the small hydraulic cylinder, a base mounting groove is installed below a base of the folding chair, a protection bearing is installed below a back support rod, and a rotary adjusting head is installed below the protection bearing.

The existing folding chairs are convenient to fold, store and unfold for use, are generally used by one person, and are not optimized in the aspects of functions, applicability of users and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a folding chair structure suitable for public occasion.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a folding chair structure, includes the preceding chair body and the back chair body and be used for the folding deformation platform that switches between two functions of the back of the chair and the desktop body that is connected between the preceding chair body and the back chair body, folding deformation platform including can roll around the back chair body backward and drive preceding chair body rebound coincide on the back chair body and roll forward and drive the preceding chair body remove forward take off the deformation frame of back chair body and inlay the platen of installing among the deformation frame, deformation frame left side part be fixed with stretch to the back chair body and lean on the part of keeping away from deformation frame one end with can be in after the articulated back chair body left side part back the regional swing back and forth left back deformation link arm in back chair body left side, deformation frame right side part be fixed with stretch to the back chair body and lean on the part of keeping away from deformation frame one end with after chair body right side part articulates can be in the regional swing back and forth back right back deformation link arm in back chair body right side, the left side part of the deformation frame is also hinged with a left front deformation connecting arm which extends to the front chair body, is close to one end far away from the deformation frame, can swing back and forth in the left area of the deformation frame after being fixed with the left side part of the front chair body and drag the front chair body to move back and forth, and the right side part of the deformation frame is also hinged with a right front deformation connecting arm which extends to the front chair body, is close to one end far away from the deformation frame, can swing back and forth in the right area of the deformation frame after being fixed with the right side part of the front chair body and drag the front chair body to move back and forth.

As right the utility model discloses a preferred, back chair body left side part is fixed with and extends left and supplies the spacing carrier block in a left side of shelving behind the back warp linking arm after the backswing of a left side, back chair body right side part is fixed with and extends right and supplies the spacing carrier block in a right side of shelving behind the back warp linking arm after the backswing of a right side.

As right the utility model discloses a preferred, the back chair body includes left back frame and right back frame and erects the erection joint and be in back seat support on left back frame top and the right back frame top, the top region at left back frame top and right back frame top still is formed with and is located back seat support the place ahead is used for supplying the amalgamation space that the front chair body moved the coincide backward.

As right the utility model discloses a preferred, the back frame in a left side include left back ejector pin and the first bracing piece in the back left side and the back left second bracing piece that the interval set up around being fixed with on the ejector pin in a left side, the first bracing piece in back left side and the back left second bracing piece form the plane support frame of upright form, the frame includes right back ejector pin and the back right first bracing piece in the back right side and the back right second bracing piece that the interval set up around being fixed with on the ejector pin in the back right side, ejector pin, right back right first bracing piece and back right second bracing piece also form the plane support frame of upright form in the back right side.

As to the utility model discloses a preferred, the back left side warp the linking arm and is located the left side region of back left side frame, the back right side warp the linking arm and is located the right side region of back right frame.

As right the utility model discloses a preferred, the deformation frame is connected gradually by preceding pole, left pole, back pole and the right pole and surrounds and form, the deformation linking arm is located before the left side pole with the left side region of the deformation linking arm behind the left side, the deformation linking arm is located before the right side pole with the right side region of the deformation linking arm behind the right side.

As to the utility model discloses a preferred, the front chair body include left front frame and right front frame and be connected some can put into the preceding seat support in the amalgamation space between left front frame and the right front frame.

As right the utility model discloses a preferred, left side front frame include left front ejector pin and the left front first bracing piece and the left front second bracing piece that the interval set up around being fixed with on the left front ejector pin, left front first bracing piece and left front second bracing piece form the plane support frame of upright form, right front frame include right front ejector pin and right front first bracing piece and right front second bracing piece that the interval set up around being fixed with on the right front ejector pin, right front first bracing piece and right front second bracing piece also form the plane support frame of upright form.

As right the utility model discloses a preferred, the preceding linking arm that warp in a left side is fixed and is leaned on the part that leans on the back at left front frame top and to the back top, the preceding linking arm that warp in the right side is fixed and is leaned on the part that leans on the back at the top of frame before the right side to the back top.

As right the utility model discloses a preferred, a left side preceding deformation connection arm with fixedly connected with left L type bar between the frame top before the left side, the right side preceding deformation connection arm with fixedly connected with right L type bar between the right front frame top.

The utility model has the advantages that: 1. the folding and unfolding switching device is more suitable for being used in public places, has better applicability, can switch between a single chair body and a double chair body through folding and unfolding actions, can switch a single chair to a table and chair complex which can be used by more people for eating, reading and the like, and has better flexibility of the number of people;

2. the operation is comparatively convenient, and the cooperation degree between the structure is better, uses comparatively smoothly.

Drawings

FIG. 1 is a perspective view of a left rear perspective of a folding chair according to one embodiment of the present invention;

FIG. 2 is a perspective view of the folding chair of FIG. 1 from a front right perspective;

FIG. 3 is a perspective view of the folding chair of FIG. 1 from a rear top perspective;

FIG. 4 is a perspective view of the folding chair of FIG. 1 during the process of folding back by deforming the frame;

FIG. 5 is a perspective view of the folding chair of FIG. 1 from a front left perspective;

fig. 6 is a perspective view of a left rear perspective of a folding chair according to another embodiment after being unfolded.

In the figure, a front chair body, b, a rear chair body, c, a folding deformation platform, d, a deformation frame, d0, a bedplate, e1, a left rear deformation connecting arm, e2, a right rear deformation connecting arm, e3, a left front deformation connecting arm, e4, a right front deformation connecting arm, b01, a left limit bearing block, b02, a right limit bearing block, b1, a left rear frame, b2, a right rear frame, b3, a rear chair seat, b30, a splicing space, b11, a left rear push rod, b12, a left rear first supporting rod, b12, a left rear second supporting rod, b12, a right rear push rod, b12, a right rear first supporting rod, b12, a right rear second supporting rod, d 12, a front supporting rod, d 12, a left front supporting rod, d 12, a rear supporting rod, a right front supporting rod, a12, a right front supporting rod, a12, a front supporting rod, a12, a right supporting rod, a front supporting rod, 12, a front supporting rod and a front supporting rod 12, a23, a right front second support rod, f1, a left L-shaped grab rail, f2 and a right L-shaped grab rail.

Detailed Description

The following specific embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent laws and protection within the scope of the present invention.

The folding chair of the embodiment adopts a structure that two chair bodies are connected, and can be changed into a folding chair body through folding, and the unfolding is a structural state that the two chair bodies are separated. In the unfolding state, the folding deformation table c can be connected between the two separated chair bodies and becomes a table top, at the moment, the front chair body a and the rear chair body b are in the separating state, and each chair body can be used by multiple people for dining, reading and the like; and under the state that the folding chair body is folded to be an overlapped chair body, the folding deformation table c becomes the chair back, the front chair body a and the rear chair body b are overlapped to be a chair body, under the state, a row of people can sit on the overlapped chair body and lean against the chair back for use, and the chair is used for resting in a more comfortable state. The left and right lengths of the front chair body a and the rear chair body b determine the number of people sitting on each chair body, preferably the left and right lengths are more than one meter, so that each chair body can be used by more than two people independently, the folded chair body can also be used by more than two people, but it can be easily seen that the number of people sitting on the folded chair body is twice as large as that of people sitting on the folded chair body in the unfolded state, and the folded deformation table c with the functions of the chair back and the table top body switched is more suitable for public occasions such as dining halls, libraries and the like because the front chair body a and the rear chair body b which are more similar to the stools are arranged at a distance from each other in the unfolded state and connected with a table top in the middle, and the front chair body a and the rear chair body b are mainly of a structure without the backrest as much as possible, and preferably of two long stools, the specific structure will be described in detail later, and the chair can be similar to the existing fixed dining table stool conjoined structure used in canteens and libraries, and the difference lies in that the folding chair of the application can be folded to become a chair, especially in canteens and libraries of factories, for example, after eating rice and reading books, people want to sit and rest better, the front chair body a and the rear chair body b are folded to form an integral chair with a chair back in the true sense, so that the chair can not only reduce the volume to match with the requirements in logistics during transportation or storage, and more importantly, the chair can realize two distinct use functions through folding and unfolding. Specifically, the method comprises the following steps:

the folding deformation platform c comprises a deformation frame d which can roll backwards around a rear chair body b to drive a front chair body a to move backwards and overlap on the rear chair body b and roll forwards to drive the front chair body a to move forwards and separate from the rear chair body b, and a platform plate d0 embedded and installed in the deformation frame d, wherein the platform plate d0 is fixed in the deformation frame d as a bearing panel, the deformation frame d preferably adopts a rectangular frame, and in an unfolded state, the deformation frame d is in a flat-laid shape and is used as a table in order to enable the folding deformation platform c to be used as a table and to be unfolded to a folded state, the deformation frame d is realized by rolling backwards to an area behind the rear chair body b, so that the folding deformation platform c can be used as a chair back, of course, the folding deformation platform c can be overlapped on the rear chair body b by driving the front chair body a to move backwards while rolling backwards, and is recovered to the unfolded state from folding to roll forwards the deformation frame d, meanwhile, the chair back form of the folding deformation table c is switched to the table form, and the backward rolling angle of the deformation frame d from the horizontal state is preferably between 90 and 120 degrees, so that if the angle exceeds 90 degrees, the folding deformation table c can be inclined by 0 to 30 degrees after rolling, and the back of a human body is comfortable to lean on. To realize that the backward rolling angle of the deformed frame d from the horizontal state is preferably 90-120 degrees, the left rear deformed connecting arm e1 and the right rear deformed connecting arm e2 are required to be inclined forward and upward in the unfolded state, the left rear deformed connecting arm e1 and the right rear deformed connecting arm e2 are mentioned later, and when they are finally folded backward, they are preferably horizontal, that is, the included angle between the left rear deformed connecting arm e1 and the horizontal plane of the rear side is 90-120 degrees, and this included angle is exactly the angle of the deformed frame d which is turned backward from the horizontal, and the right rear deformed connecting arm e2 on the right side is also designed in the same way as on the left side, and is preferably in left-right mirror symmetry. In the unfolded state, the folding deformation table c is flatly laid at the position above the front and back intervals of the front chair body a and the back chair body b, and the folding deformation table c, the front chair body a and the back chair body b are in a triangular arrangement. Further, in order to realize the above-mentioned switching states, a left rear deformable connecting arm e1 is fixed to the left side of the deformable frame d, which extends toward the rear body b, a portion of the deformable frame d near one end of the deformable frame d is hinged to the left side of the rear body b, and can swing back and forth in the left area of the rear body b, a right rear deformable connecting arm e2 is fixed to the right side of the deformable frame d, which extends toward the rear body b, a portion of the deformable frame d near one end of the deformable frame d is hinged to the right side of the rear body b, and can swing back and forth in the right area of the rear body b, a left front deformable connecting arm e3 is hinged to the left side of the deformable frame d, which can swing back and forth in the left area of the deformable frame d and drag the front body a to move back and forth after a portion of the deformable frame a near one end of the deformable frame d is fixed to the left side of the front body a, the right side part of the deformation frame d is also hinged with a right front deformation connecting arm e4 which extends to the front chair body a, is fixed with the part of the right side part of the front chair body a, and can swing back and forth in the area of the right side of the deformation frame d and drag the front chair body a to move back and forth. The left rear deformable connecting arm e1 and the right rear deformable connecting arm e2 can swing around the rear chair body b, namely can rotate and roll back and forth in a vertical plane, so that a fixed deformable frame d can be driven to roll back and forth to adjust the position and the angle so as to deform, and due to the arrangement of the left front deformable connecting arm e3 and the right front deformable connecting arm e4, the front chair body a can be dragged backwards by the deformable frame d after the deformable frame d rolls backwards, and meanwhile, due to the design of hinging with the deformable frame d, the left rear deformable connecting arm e1 and the right rear deformable connecting arm e2 have a horizontal supporting form which can be always kept in a use state, so that the left rear deformable connecting arm e1 and the right rear deformable connecting arm e can be used independently in an unfolding state or can be folded on the rear chair body b in a folding state, and the use state can be kept for people to use.

On the premise of the frame structure, specific structural details can be further designed to achieve better effects.

A left limit bearing block b01 which extends leftwards and is used for the left rear transformable connecting arm e1 to swing backwards and to be placed is fixed at the left side part of the rear chair body b, and a right limit bearing block b02 which extends rightwards and is used for the right rear transformable connecting arm e2 to swing backwards and to be placed is fixed at the right side part of the rear chair body b. The left limit bearing block b01 and the right limit bearing block b02 enable the deformed frame d to be limited when being turned backwards, and the deformed frame d can be supported on the left limit bearing block b01 and the right limit bearing block b02 through the left rear deformation connecting arm e1 and the right rear deformation connecting arm e2 in the process of turning backwards the folding chair body, so that the deformed frame d can be well supported and is not easy to move upwards and downwards. The left and right lengths of the left limit bearing block b01 and the right limit bearing block b02 are not too large, so long as the left rear transformable connecting arm e1 and the right rear transformable connecting arm e2 can be used by touching, and the overlapping of the left and right side structures of the front chair body a can be influenced by too long length.

Further, the rear chair body b comprises a left rear frame b1, a right rear frame b2 and a rear chair seat b3 which is erected and connected on the top of the left rear frame b1 and the top of the right rear frame b2, and a split space b30 which is positioned in front of the rear chair seat b3 and used for enabling the front chair body a to move backwards and fold is further formed above the top of the left rear frame b1 and the top of the right rear frame b 2. That is, a portion of the top of the left rear frame b1 and the top of the right rear frame b2 is located so as to protrude forward beyond the rear seat b3, and the upper region of the protruding portion is the fitting space b30, so that the seat portion of the front body a can be placed backward in the fitting space b30 and supported on the top of the left rear frame b1 and the top of the right rear frame b 2. After the front chair body a is put into the splicing space b30, the frame parts of the left and right sides of the front chair body a can be just supported on the ground as far as possible, so that the weight of the chair and the bearing weight can be shared better by the frame parts of the left and right sides of the rear chair body b and the front chair body a, and the supporting performance can be better.

Specifically, the left rear frame b1 includes a left rear post bar b11, a left rear first support bar b12 and a left rear second support bar b13 fixed to the left rear post bar b11 at a distance from each other, a left rear first support bar b12 may be fixed to a front end of the left rear post bar b11, a left rear second support bar b13 may be fixed to a rear end of the left rear post bar b11, the left rear first support bar b12 and the left rear second support bar b13 extend downward for support, the left rear post bar b11, the left rear first support bar b12 and the left rear second support bar b13 form an upright planar support frame, the left rear first support bar b12 and the left rear second support bar b13 serve as left two legs, and the left rear post bar b11, the left rear first support bar b12 and the left rear second support bar b13 may be fixed by welding using square steel tubes. Generally, the left rear ejector pin b11 can be horizontally extended, and the left rear first supporting rod b12 and the left rear second supporting rod b13 are in a standing supporting state; the left rear first support bar b12 preferably inclines downward and the left rear second support bar b13 preferably inclines downward, so that the rear seat b can be raised in the front and rear support range to improve the stability without being completely vertically arranged. The structure of the planar support frame means that the left side surfaces of the left rear ejector rod b11, the left rear first support rod b12 and the left rear second support rod b13 are preferably coplanar, and the right side surfaces are also preferably coplanar, so that mainly more parts of the frame structure formed by the left rear ejector rod b11, the left rear first support rod b12 and the left rear second support rod b13 are located in the same vertical plane in the vertical direction to better support in the vertical direction, and the left side and the right side are kept flat, so that the planar support frame is made of square steel pipes with the same left and right dimensions. Similarly, the right rear frame b2 includes a right rear post rod b21, and a right rear first support rod b22 and a right rear second support rod b23 that are fixed to the right rear post rod b21 and are spaced apart from each other in the front-rear direction, the right rear first support rod b22 may be fixed to a portion of the right rear post rod b21 near the front end, the right rear second support rod b23 may be fixed to a portion of the right rear post rod b21 near the rear end, the right rear first support rod b22 and the right rear second support rod b23 may also extend downward for support, and the right rear post rod b21, the right rear first support rod b22 and the right rear second support rod b23 may also form an upright planar support frame. The right rear frame b2 and the left rear frame b1 are in left-right mirror symmetry and can be made of square steel tubes. The left limit bearing block b01 can be welded and fixed on the left side surface of the left rear second support bar b13, or the left side surface of the left rear ejector pin b11, or the left side surface of the junction of the left rear second support bar b13 and the left rear ejector pin b11 by adopting a square steel pipe or a square steel block, and the left limit bearing block b01 is arranged at the rear part of the left rear frame b1, for example, at the upper end position of the left rear second support bar b 13; the right limit bearing block b02 can also be welded and fixed on the right side surface of the right rear second support bar b23, or the right side surface of the right rear ejector pin b21, or the right side surface of the junction of the right rear second support bar b23 and the right rear ejector pin b21 by adopting a square steel pipe or a square steel block, and the right limit bearing block b02 is positioned at the rear part of the right rear frame b2, for example, at the upper end position of the right rear second support bar b 23.

Further, the left rear tether arm e1 is located in the left side region of the left rear frame b1, and the right rear tether arm e2 is located in the right side region of the right rear frame b 2. The left rear transformable connecting arm e1 and the right rear transformable connecting arm e2 are preferably made of square steel tubes, in the unfolded state, the left rear transformable connecting arm e1 and the right rear transformable connecting arm e2 are in a downward extending state, the lower end part of the left rear transformable connecting arm e1 is preferably hinged with the front end part of the left rear first supporting rod b12 through a hinge shaft which penetrates through the left rear first supporting rod and the right rear first supporting rod from left to right and is positioned on the left side of the left rear frame b1, the left rear transformable connecting arm e1 can freely swing back and forth until the lower end part of the left rear transformable connecting arm e1 is limited by the continuous swinging of the left limiting bearing block b01 from back to bottom, of course, the lower end part of the left rear transformable connecting arm e1 can also be hinged with other parts of the left rear frame b1, and the left rear transformable connecting arm e1 can drive the transformable frame d to swing and deform back and forth by hinging with the front parts. In addition, in order to better limit and support the left rear transformable connecting arm e1 abutting against the left limit bearing block b01, the upper surface of the left limit bearing block b01 is kept as horizontal as possible, the hinged shaft of the left rear transformable connecting arm e1 and the left rear frame b1 is preferably arranged in the front upper part of the left limit bearing block b01, thus, the left rear deformation connecting arm e1 can be just flatly leaned on the left limit bearing block b01 when swinging backwards and keeping the horizontal state, the vertical distance between the center of the hinge shaft and the upper surface of the left limit bearing block b01 can be equal to the vertical distance between the center of the hinge shaft and the bottom surface of the left rear transformable connecting arm e1 when the left rear transformable connecting arm e1 is horizontally placed, the better leaning support can be realized, of course, the length of the left rear deformation connecting arm e1 can swing backwards to lean against the left limit bearing block b01, and after all, the deformation frame d is rolled to the rear side area of the rear chair body b. Similarly, the lower end portion of the right rear tether arm e2 is preferably hinged to the front end portion of the right rear first support rod b22 through a hinge shaft passing through the right and left rear support rods and located on the right side of the right rear frame b2 so as to be able to swing freely back and forth until it is restrained by the right stopper bearing block b02 from continuing to swing back and down to support the right rear tether arm e 2. Of course, the right rear link deformable arm e2 may be hinged to the other portion of the right rear frame b2 in the front direction, and the right rear link deformable arm e2 may be hinged to the other portion in the front direction, so that the deformable frame d is deformed to swing back and forth. Thus, the left rear tether arm e1 and the right rear tether arm e2 are deformed to bring the deforming frame d to an effective rolling motion at both left and right sides. The structural design of the right rear transformable connecting arm e2 and the right limit bearing block b02 can refer to the structures of the left rear transformable connecting arm e1 and the left limit bearing block b01 on the left and right, and the structural design is left-right mirror symmetry with the left structure, and mainly aims to enable the right rear transformable connecting arm e2 to swing better, and improve the stability of the limit static support, the avoidance performance during movement between structures and the like.

Furthermore, the deformed frame d is formed by sequentially connecting and surrounding a front side rod d1, a left side rod d2, a rear side rod d3 and a right side rod d4, the front side rod d1, the left side rod d2, the rear side rod d3 and the right side rod d4 can also be made of square steel pipes and are sequentially connected end to end through welding to form a rectangular frame structure, and the frame structure is also flat. And the left front tether arm e3 is located in the left side region of the left side bar d2 and the left rear tether arm e1, and the right front tether arm e4 is located in the right side region of the right side bar d4 and the right rear tether arm e2, which are similar to the linkage structure between the rear seat body and the tether frame d, but different from each other, specifically, the left side bar d2 and the left rear tether arm e1 are preferably formed in a planar L-shape or a structure similar to the L-shape, that is, the left and right sides are coplanar, the top end of the left rear tether arm e1 is preferably welded and fixed to the bottom surface of the rear end of the left side bar d2, so that the left front tether arm e3 can move freely in the left side region of the left side bar d2 and the left rear tether arm e1 without interference during folding or unfolding, and the left rear tether arm e1 is not interfered by the left rear frame b1, therefore, the left rear deformable connecting arm e1 and the left front deformable connecting arm e3 can move freely during folding and unfolding of the left side part of the chair. Similarly, the right rod d4 and the right rear tether arm e2 are preferably formed in a planar L-shape or a structure similar to the L-shape, i.e. the left and right sides are coplanar, and the top end of the right rear tether arm e2 is preferably welded and fixed to the bottom surface of the rear end of the right rod d4, also for the smooth movement of the tether. The flat or planar frame structure is not only non-interfering with the deformation, but is also a more stable structure to the forces applied to the structure itself.

The coplanar condition in the planar frame structure mentioned above or later is preferably at least that the parts of the left side structure and the right side structure of the chair are coplanar, for example, in the planar frame structure on the left side of the chair, the coplanar condition is ensured as much as possible because the outer part is the part where the deformation action will affect, and the optimization of the structure itself and the reduction of the action interference are all better.

The structure of the front side of the whole chair is as follows: the front chair body a comprises a left front frame a1, a right front frame a2, and a front chair seat a3 which is connected between the left front frame a1 and the right front frame a2 and can be placed in a split space b 30. More specifically, the left front frame a1 includes a left front post rod a11, a left front first support rod a12 and a left front second support rod a13 fixed to the left front post rod a11 and spaced apart from each other in the front-rear direction, the left front post rod a11, the left front first support rod a12 and the left front second support rod a13 form an upright planar support frame, the right front frame a2 includes a right front post rod a21, a right front first support rod a22 and a right front second support rod a23 fixed to the right front post rod a21 and spaced apart from each other in the front-rear direction, and the right front post rod a21, the right front first support rod a22 and the right front second support rod a23 also form an upright planar support frame. Each rod in the left front frame a1 and the right front frame a2 can also be made of square steel tubes and fixed by welding, and the structure can refer to the left rear frame and the right rear frame, and the difference lies in the connection mode of the left front deformation connecting arm e3 and the right front deformation connecting arm e 4: the left front morphing connecting arm e3 is fixed on the rear portion of the top of the left front frame a1 and is inclined to the rear and the upper direction, the right front morphing connecting arm e4 is fixed on the rear portion of the top of the right front frame a2 and is inclined to the rear and the upper direction, preferably, both the left front morphing connecting arm e3 and the right front morphing connecting arm e4 can also adopt a square steel tube structure, in the unfolded state, the lower end of the left front morphing connecting arm e3 can be welded and fixed with the rear end portion of the left front push rod a11 or welded and fixed with the upper end portion of the left front second support rod a13, specifically, in a way, the rear end of the left front push rod a11 is fixedly welded on the upper portion of the front side face of the left front second support rod a13, the left front second support rod a13 is in a standing state, the main body extends downwards and the upper end portion exceeds the left front push rod a11 and is welded and fixed with the lower end portion of the left front morphing connecting arm e3, the left front linking arm e3 and the left and right side surfaces of the left front push rod a11 are preferably coplanar, i.e. the left front linking arm e3 and the left front frame a1 form a flat planar frame, so as to optimize the structure, the left front first supporting rod a12 can be welded and fixed at the front end of the left front push rod a11 through the upper part of the rear side surface thereof, the left front first supporting rod a12 is also required to extend downwards, and the front first supporting rod a12 and the left front second supporting rod a13 are used as two legs on the left side of the front chair body. Preferably, in the unfolded state of the entire chair, the upper end portion of the left front tether e3 is positioned to the left of the left rod d2 and is hinged by means of a hinge shaft passing through both the upper end portion of the left front tether e3 and the front end portion of the left rod d2 in the left-right direction. The structure of the left front deformable linking arm e3 that is inclined is also of special significance and preferably to a greater extent than the left rear deformable linking arm e1, the angle between the left front deformable linking arm e3 and the front horizontal plane is preferably between 120 and 150 degrees, which is also understood to be the angle between the left front deformable linking arm e3 and the left front carrier rod a11 towards the front, while the left front deformable linking arm e3 and the left front frame a1 are fixed structures so that the angle is always fixed, unlike the left rear deformable linking arm e1, the left rear deformable linking arm e1 is the main driving part for rolling, and is inclined in the unfolded state but becomes horizontal in the folded state by rolling backwards. The left front deformable linking arm e3 is inclined such that there is a horizontal space between the front seat a3 and the front rod d1 of the deformable frame d, when the whole chair is unfolded, the two chair bodies are used independently, so that the user can have enough space to enter the front chair body, when the two chair bodies are folded, the deformable frame d can be wound around the rear side of the rear seat b3, so that the rear seat is better between the front seat a3 and the deformable frame d, that is, after the front seat a3 fills the splicing space b30, so that the three can keep a better horizontal contact state, and when the chair is unfolded, the rear seat side has the splicing space b30, so that all users can conveniently enter the rear chair body, so that the left rear deformable linking arm e1 is not inclined too much or not inclined, and if there is inclined, the deformable frame d is turned over, so that the user can lean backwards with a certain inclination, the foregoing has been mentioned in this regard. While the connection of the left front tether arm e3 has been described in detail in this paragraph, the right front tether arm e4 can be fully referred to the left front tether arm e3, i.e. the right side relates to the connection structure of the right front tether arm e4, and can be in a left side configuration and preferably mirror image with the left side configuration, and certainly in order to operate synchronously with the left side configuration during use or adjustment of the chair.

It is important to note that the heights of the hinge axes of the left front transformable connecting arm e3 and the left rod d2 and the hinge axes of the right front transformable connecting arm e4 and the right rod d4 are the same in the unfolded state and the folded state of the chair, that is, the heights of the hinge axes are not changed before and after the transformation frame is turned over, so as to ensure that the front chair body only moves horizontally and does not move vertically, thereby ensuring that the front chair body is better used, based on the structure, taking the left side structure of the chair as an example, the vertical height difference between the upper surface and the lower surface of the left limiting bearing block b01 in the unfolded state of the hinge axes of the left front transformable connecting arm e3 and the left rod d2 is equal to the vertical distance between the hinge axes of the left front transformable connecting arm e3 and the left rod d2 in the unfolded state and the rear side of the left transformable connecting arm e1, and the right side of the chair is designed with reference to the left side, the articulated shaft at the position can ensure that the front chair body does not move up and down when the articulated shaft is unfolded to a state of overturning and forward folding.

Preferably, the hinge axis j of the upper end portion of the left front transformable connecting arm e3 and the front end portion of the left rod d2 is located at the rear side of the front end face of the left rod d2, so that the left rod d2 forms a left overlapped lifting section d200 between the hinge axis and the front end face of the left rod d2, the front portion of the right rod d4 forms a corresponding right overlapped lifting section d400, the left front transformable connecting arm e3 is preferably welded and fixed with a left limit support lifting rod d201 extending to the right, the right front transformable connecting arm e4 is preferably welded and fixed with a right limit support lifting rod d401 extending to the left, in the unfolded use state of the chair, the left limit support lifting rod d201 is preferably located below the left rod d2 and right abuts against the left rod d2, and the right limit support lifting rod d401 is preferably located below the right rod d4 and right abuts against the right rod d4, in the unfolded use state of the left rod 2 and the right rod d4, therefore, on one hand, the vertical support of the hinge shafts on two sides can be shared; on one hand, the deformation frame d can be limited to continuously roll forwards to cause the forward movement or the easy movement of the front chair body under the condition that a person sits, so that the structure is not stable enough, and the backward rolling is needed to lift the front chair body, so that the person is not easy to move under the condition that the person sits, and the limitation structure is not needed; on the other hand, it is important that when the chair needs to be folded, the front chair body can be lifted first, the front chair body supports the deformed frame d by the left limit support lifting rod d201 and the right limit support lifting rod d401, and is lifted upwards and backwards, so that the deformed frame d is turned backwards by the left rear deformable connecting arm e1 and the right rear deformable connecting arm e2, thus a lever force is very labor-saving, when the left rear deformable connecting arm e1 and the right rear deformable connecting arm e2 are located, namely reach a backward horizontal position, then the deformed frame d is located correspondingly, especially when the left limit bearing block b01 and the right limit bearing block b02 are present, the left rear deformable connecting arm e1 and the right rear deformable connecting arm e2 can be located better, thus the chair is folded by half, and then the lifted front chair body is turned downwards by the hinge shaft j of the left front deformable connecting arm e3 and the right front deformable connecting arm e4 and the deformed frame d and the hinge shaft j of the front seat 3 are put into the front seat space 30 b 78 b Can be prepared.

In a more preferable design of the chair structure, a left rear bottom reinforcing rod b14 extending forward and backward and located below the left rear top bar b11 is fixed between the left rear first supporting rod b12 and the left rear second supporting rod b13, the left rear bottom reinforcing rod b14 may be a square steel tube, and is welded and fixed at front and rear ends between the left rear first supporting rod b12 and the left rear second supporting rod b13, a right rear bottom reinforcing rod b24 extending forward and backward and located below the right rear top bar b21 is fixed between the right rear first supporting rod b22 and the right rear second supporting rod b23, and the right rear bottom reinforcing rod b24 may be a square steel tube, and is welded and fixed at front and rear ends between the right rear first supporting rod b22 and the right rear second supporting rod b 23. And the left rear bottom reinforcing rod b14 is a middle rear reinforcing bottom rod b124 which extends left and right between the front and rear middle parts of the left rear bottom reinforcing rod b14 and the front and rear middle parts of the right rear bottom reinforcing rod b24, the middle rear reinforcing bottom rod b124 can be welded between the left rear bottom reinforcing rod b14 and the right rear bottom reinforcing rod b24 by adopting a square steel tube, and the three parts of the reinforcing structure are in a T shape, so that the strength of the rear chair body is enhanced, and particularly in the folding state of the chair, the rear chair body can play a more role of supporting the base. The front chair body does not need to adopt the T-shaped structure, on one hand, much support is supported by the rear chair body when the front chair body is folded, and in the folded state, the two chair bodies share the T-shaped reinforcing structure, on the other hand, the folding action can be influenced by the T-shaped reinforcing structure, and particularly, if the front chair body has a structure extending leftwards and rightwards like the middle rear reinforcing bottom rod b124, the downward action can be blocked when the front chair body is folded on the rear chair body.

It is also important to design the seat, wherein the rear seat b3 may include two rear seat reinforcing rods b31 spaced apart from each other in the front-rear direction and extending in the left-right direction, and a rear seat plate b32 fixed to the two rear seat reinforcing rods b31 in the front-rear direction and extending in the left-right direction, the rear seat reinforcing rods b31 are preferably square steel tubes, and the lower surfaces of the left and right ends of the rear seat reinforcing rod b31 may be welded to the upper surface of the left rear push rod b11 and the upper surface of the right rear push rod b21, so that the rear seat reinforcing rod b31 is above the left rear push rod b11 and the right rear push rod b21, that is, the rear seat reinforcing rod b31 is higher than the left rear push rod b11 and the right rear push rod b21, the rear seat plate b32 may be of wood plate structure or wood-plastic plate structure, etc., so that the rear seat plate b32 and the rear seat reinforcing rod b31 may be fixed by passing through the through holes of the two and connecting nuts, in addition, the rear seat plate b32 can be laid with more comfortable plate exterior elements such as soft pads and leather sleeves and a better rear seat plate b32 on the upper surface or the front surface of a base plate such as a wooden plate, however, the uppermost side of the rear seat plate b32 is preferably higher than the rear seat reinforcing rod b31 to ensure the sitting comfort. It can be seen from the above structure that the rear seat b3 is protruded from the upper side of the left rear lift bar b11 and the right rear lift bar b21 as a whole, and according to the design of the split space b30, the split space b30 is the stepped space structure of the front side of the rear seat b3, and the front seat a3 is to be integrated into it, so that the structural design has a better overall effect after being folded. The design of the front seat a3 is preferably different from that of the rear seat, the front seat a3 may include two front seat stiffening rods a31 spaced apart from each other and extending left and right, and a front seat plate a32 extending left and right and fixed between the front seat stiffening rods a31, the two front seat stiffening rods a31 are also preferably made of square steel tubes, and the left and right ends of the two front seat stiffening rods a31 may be welded and fixed to the right side surface of the left front push rod a11 and the left side surface of the right front push rod a21, respectively, the upper and lower thickness dimensions of the two front seat stiffening rods a31 and the left and right front push rods a11 and a21 are preferably equal and the upper and lower heights thereof are kept the same, so that a flat frame structure is formed, the front seat plate a32 is fixed in the frame structure, and the front seat plate a32 is mounted between the two front seat stiffening rods a31, the uppermost side of the front seat plate a32 is preferably higher than the two front seat reinforcing rods a31, and also for comfort, but the difference between the front seat a3 is that the two front seat reinforcing rods a31 are level with the left front ejector rod a11 and the right front ejector rod a21, unlike the aforementioned rear seat reinforcing rod b31 above the left rear ejector rod b11 and the right rear ejector rod b21, so that the rear seat b3 and the front seat a3 can be better stacked on the left rear ejector rod b11 and the right rear ejector rod b21 and can be more level when they are folded, and the overall effect after folding is better, so the upper and lower heights of the rear seat b3 and the front seat a3 are kept as consistent as much as possible. Further, based on this structure, the height of the left front push rod a11 and the right front push rod a21 is higher than the height of the left rear push rod b11 and the right rear push rod b21, which is advantageous in that, in the case where the front-rear length of the left front push rod a11 and the right front push rod a21 is left and right, the rear portions of the left front push rod a11 and the right front push rod a21 can cover the end portions of the left and right ends of at least a part of the rear seat reinforcing rod b31 in the horizontal left-right direction, and the exposure of the end portions is reduced in the superimposed state, of course, the two ends of the two front seat reinforcing rods a31 are also fixed and covered by the left front push rod a11 and the right front push rod a21 in the left-right direction, and the rear one front seat reinforcing rod a31 of the two front seat reinforcing rods a31 is preferably located at a distance in front of the rear end surfaces of the left front push rod a11 and the right front push rod a21, such as at a21 in the left and right front end surfaces of the left front push rod a11 and the right push rod a21, has better use effect.

Furthermore, a left L-shaped grab bar f1 is fixedly connected between the left front transformable connecting arm e3 and the top of the left front frame a1, and a right L-shaped grab bar f2 is fixedly connected between the right front transformable connecting arm e4 and the top of the right front frame a 2. The left L-shaped grab rail f1 and the right L-shaped grab rail f2 may be structural rods formed by bending square steel pipes and may be fixed by welding. On the one hand, the structural strength of the front chair body can be enhanced, and on the other hand, the front chair body can be really used as an armrest of the chair in a folding state.

In addition, the platen d0 embedded and fixed in the deformed frame d can be fixed by the existing bolt or screw, the platen d0 can adopt a wood plate as the base plate, but the upper side of the base plate in the unfolded state of the chair is preferably polished and waxed for some surface treatment, and the lower side is preferably covered with some soft pads and leather sheath structures, because in the unfolded state, the upper side of the platen d0 is the use surface, and in the folded state of the chair, the lower side of the platen d0 in the unfolded state becomes the use surface which is forward for the human body to lean against.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The folding chair structure is characterized by comprising a front chair body (a), a rear chair body (b) and a folding deformation table (c) which is connected between the front chair body (a) and the rear chair body (b) and used for switching between two functions of a chair back and a table top body, wherein the folding deformation table (c) comprises a deformation frame (d) which can roll backwards around the rear chair body (b) to drive the front chair body (a) to move backwards and be superposed on the rear chair body (b) and roll forwards to drive the front chair body (a) to move forwards and be separated from the rear chair body (b) and a table plate (d 0) embedded in the deformation frame (d), a part on the left side of the deformation frame (d) is fixedly provided with a left rear deformation connecting arm (e 1) which extends towards the rear chair body (b) and is hinged to a part far away from one end of the deformation frame (d) and a part on the left side of the rear chair body (b) and can swing forwards and backwards in a region on the left side of the rear chair body (b), a right rear deformation connecting arm (e 2) which extends to the rear chair body (b) and is hinged with the right side part of the rear chair body (b) and can swing back and forth in the right side area of the rear chair body (b) is fixed at the right side part of the deformation frame (d), the left side part of the deformation frame (d) is also hinged with a left front deformation connecting arm (e 3) which extends to the front chair body (a), is close to one end far away from the deformation frame (d), can swing back and forth in the left side area of the deformation frame (d) after being fixed with the left side part of the front chair body (a) and drag the front chair body (a) to move back and forth, the right side part of the deformation frame (d) is hinged with a right front deformation connecting arm (e 4) which extends to the front chair body (a) and is close to one end far away from the deformation frame (d), and the right front deformation connecting arm can swing back and forth in the right side area of the deformation frame (d) and drag the front chair body (a) to move back and forth after being fixed with the right side part of the front chair body (a).

2. A folding chair structure according to claim 1, characterized in that the left side part of the rear chair body (b) is fixed with a left position limiting bearing block (b 01) extending leftwards and allowing the left rear transformable connecting arm (e 1) to swing backwards and to be rested, and the right side part of the rear chair body (b) is fixed with a right position limiting bearing block (b 02) extending rightwards and allowing the right rear transformable connecting arm (e 2) to swing backwards and to be rested.

3. A folding chair structure as claimed in claim 1, wherein said rear chair body (b) comprises a left rear frame (b 1) and a right rear frame (b 2), and a rear chair seat (b 3) mounted and connected on the top of said left rear frame (b 1) and the top of said right rear frame (b 2), and a splicing space (b 30) located in front of said rear chair seat (b 3) and used for enabling said front chair body (a) to move backwards and fold is formed above the top of said left rear frame (b 1) and the top of said right rear frame (b 2).

4. A folding chair structure according to claim 3, characterized in that the left rear frame (b 1) comprises a left rear top bar (b 11) and a left rear first support bar (b 12) and a left rear second support bar (b 13) fixed on the left rear top bar (b 11) and arranged at a distance from each other in the front-rear direction, the left rear top bar (b 11), the left rear first support bar (b 12) and the left rear second support bar (b 13) form an upright plane type support frame, the right rear frame (b 2) comprises a right rear top bar (b 21) and a right rear first support bar (b 22) and a right rear second support bar (b 23) fixed on the right rear top bar (b 21) and arranged at a distance from each other in the front-rear direction, and the right rear top bar (b 21), the right rear first support bar (b 22) and the right rear second support bar (b 23) also form an upright plane type support frame.

5. A folding chair structure according to claim 4, characterized in that the rear left deformable connecting arm (e 1) is located in the left area of the rear left frame (b 1) and the rear right deformable connecting arm (e 2) is located in the right area of the rear right frame (b 2).

6. A folding chair structure according to claim 3, characterized in that said deformable frame (d) is formed by a front side bar (d 1), a left side bar (d 2), a rear side bar (d 3) and a right side bar (d 4) which are connected and enclosed in sequence, said left front deformable linking arm (e 3) being located in the left side area of said left side bar (d 2) and said left rear deformable linking arm (e 1), and said right front deformable linking arm (e 4) being located in the right side area of said right side bar (d 4) and said right rear deformable linking arm (e 2).

7. A folding chair structure according to claim 6, characterized in that the front chair body (a) comprises a left front frame (a 1) and a right front frame (a 2) and a front chair seat (a 3) which is connected between the left front frame (a 1) and the right front frame (a 2) and can be placed in the split space (b 30).

8. The folding chair structure according to claim 7, wherein the left front frame (a 1) comprises a left front top bar (a 11) and a left front first support bar (a 12) and a left front second support bar (a 13) fixed on the left front top bar (a 11) and arranged at a distance from each other in the front-back direction, the left front top bar (a 11), the left front first support bar (a 12) and the left front second support bar (a 13) form an upright plane type support frame, the right front frame (a 2) comprises a right front top bar (a 21) and a right front first support bar (a 22) and a right front second support bar (a 23) fixed on the right front top bar (a 21) and arranged at a distance from each other in the front direction, and the right front top bar (a 21), the right front first support bar (a 22) and the right front second support bar (a 23) also form an upright plane type support frame.

9. The folding chair structure as claimed in claim 8, wherein said left front tether (e 3) is fixed to the rear top portion of the left front frame (a 1) and inclined rearwardly and upwardly, and said right front tether (e 4) is fixed to the rear top portion of the right front frame (a 2) and inclined rearwardly and upwardly.

10. A folding chair structure, according to claim 9, characterized in that between said left front articulated arm (e 3) and the top of said left front frame (a 1) there is fixedly connected a left L-shaped grab bar (f 1), and between said right front articulated arm (e 4) and the top of said right front frame (a 2) there is fixedly connected a right L-shaped grab bar (f 2).