Movable chair frame and folding chair

Abstract

The utility model relates to the technical field of folding chairs, and provides a movable chair frame and a folding chair, the movable chair frame comprises supporting rod groups arranged in pairs and a connecting assembly connected between the supporting rod groups, each supporting rod group comprises a first foot rod, a second foot rod, a seat rod and a back supporting rod, the seat rod is used for fixing a cushion of the folding chair, and the back supporting rod is used for supporting the back supporting rod. A first connecting piece is arranged at the top end of the first foot rod, the second foot rod is connected with the first foot rod through the first connecting piece, the bottom end of the first foot rod and the bottom end of the second foot rod form bottom feet of the movable chair frame, and the seat rod is connected with the first foot rod and the second foot rod; a second connecting piece is arranged at the top end of the second foot rod, and the back supporting rods are hinged to the second connecting piece so that the backrest fixed between the back supporting rods can rotate. The back supporting rod and the backrest can be tightly attached to the back of a user and support the body of the user along with the posture of the human body, and the flexibility of sitting posture adjustment of the user is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of folding chairs, in particular to a movable chair frame and a folding chair. Background Art

[0002] In modern life, chairs are essential daily furniture for people to sit and rest, avoiding fatigue caused by lying or standing for a long time and reducing energy consumption from standing for a long time. Therefore, they are widely used in various training institutions, schools at all levels, public places, hospitals, restaurants, hotels, companies, homes and other places for users.

[0003] Chairs have a variety of structural designs. Among them, the folding chair is a special structure of chair that is not only easy to carry and transport, but can also be folded when not in use to reduce the space it occupies. Folding chairs are usually a combination of pipes and fabrics. The fabric seat surface can evenly distribute the load when the user sits, ensuring user comfort.

[0004] However, in the process of using the existing folding chair, the user is often unable to flexibly adjust the sitting posture, which often causes the user's waist and back discomfort. Therefore, how to provide a folding chair that is easy to adjust the sitting posture has become a technical problem to be solved in the art. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model provides a movable chair frame and a folding chair, and the folding chair backrest angle of the movable chair frame is adjustable, which is convenient for users to adjust their sitting posture and can improve the user experience.

[0006] To achieve the above-mentioned purpose, as one aspect of the utility model, a movable chair frame of a folding chair is provided, the movable chair frame comprising a pair of support rods and a connecting assembly connected between the support rods, the support rods comprising a first foot rod, a second foot rod, a seat rod and a back support rod, the seat rod is used to fix the seat cushion of the folding chair, the top end of the first foot rod is provided with a first connecting piece, the second foot rod is connected to the first foot rod through the first connecting piece, the bottom ends of the first foot rod and the second foot rod are both formed as the bottom feet of the movable chair frame, and the seat rod is connected to the first foot rod and the second foot rod;

[0007] A second connecting piece is arranged at the top end of the second foot rod, and the back support rod is hinged to the second connecting piece so that the backrest fixed between the back support rods can rotate.

[0008] Optionally, the cross-sectional shape of each rod in the support rod group is circular.

[0009] Optionally, a first foot piece is disposed at the bottom end of the first foot rod, and the first foot piece is made of plastic.

[0010] Optionally, the bottom of the first foot member has a first anti-slip contact surface, and a plurality of first anti-slip grooves arranged in parallel and at intervals are formed on the first anti-slip contact surface.

[0011] Optionally, a second foot piece is disposed at the bottom end of the second foot rod, and the second foot piece is made of plastic.

[0012] Optionally, the bottom of the second foot piece has a second anti-slip contact surface, and a plurality of second anti-slip grooves arranged in parallel and at intervals are formed on the second anti-slip contact surface.

[0013] Optionally, the second connecting member includes a mounting sleeve and a first hinged portion, the mounting sleeve is arranged on the top end of the second foot rod, the first hinged portion is fixedly connected to the side of the mounting sleeve, and the back support rod is hinged to the first hinged portion.

[0014] Optionally, a first hinge hole is formed on the side of the first hinge portion facing the second connecting member on the opposite side, a second hinge hole is formed in the back support rod, and the back support rod is hinged to the first hinge portion via a fastener that passes through the first hinge hole and the second hinge hole in sequence.

[0015] Optionally, a reinforcing rib is provided between the side wall of the mounting sleeve and the top of the first hinged portion.

[0016] Optionally, a limit platform is fixedly provided on the side of the mounting sleeve facing the opposite second connecting member, and the first hinged portion is located on the side of the limit platform close to the bottom end of the second foot rod. The limit platform can abut against the back support rod when the top end of the back support rod rotates away from the bottom end of the second foot rod to limit the rotation angle of the back support rod.

[0017] Optionally, the limiting platform has a matching inclined surface on a side facing the back support rod, and the angle of the matching inclined surface corresponds to the angle when the back support rod is rotated to contact the limiting platform.

[0018] Optionally, an accommodating groove is formed on the matching inclined surface, and when the back support rod is rotated to contact the limiting platform, it is partially matched and accommodated in the accommodating groove.

[0019] Optionally, an avoidance cavity is formed in the limit platform, and at least one first fastener is arranged in the avoidance cavity. The first fastener passes through a through hole penetrating the side wall of the mounting sleeve and is fixedly connected to the second foot rod.

[0020] Optionally, at least one second fastener is further provided on the second connecting member, and the second fastener passes through a through hole penetrating the side wall of the mounting sleeve and is fixedly connected to the second foot rod.

[0021] Optionally, the second connecting member includes a mounting sleeve and a second hinged portion, the mounting sleeve is mounted on the top end of the second foot rod, and the second hinged portion is fixedly connected to the side of the mounting sleeve;

[0022] The connecting assembly includes a first connecting rod arranged crosswise, the top end of the first connecting rod is hinged to the second hinged parts of the second connecting members on both sides respectively, and the bottom end of the first connecting rod is hinged to the bottom end of the first foot rod on the opposite side.

[0023] Optionally, the movable chair frame also includes a first hinge, the top end of the first connecting rod is hinged to the second hinge part of the second connecting member through the first hinge, the first hinge includes a first hinge plate and a second hinge plate, the second hinge part is formed with a third hinge hole on the side of the second connecting member facing the opposite side, a fourth hinge hole is formed in the first hinge plate, the second hinge part is hinged to the first hinge plate through a connecting member passing through the fourth hinge hole and the third hinge hole, and the top end of the first connecting rod is hinged to the second hinge plate.

[0024] Optionally, the bottom end of the first connecting rod is hinged to the bottom end of the first foot rod through the corresponding first foot piece.

[0025] Optionally, the top end of the second foot bar passes through the first connecting member, the second foot bar is hinged to the top end of the first foot bar through the first connecting member and can slide in the first connecting member, and the seat bar is hingedly connected to the first foot bar and the second foot bar.

[0026] Optionally, a first limiting hole is formed on the second foot rod, a first limiting nail is arranged in the first limiting hole, the first limiting nail is located between the first connecting member and the top end of the second foot rod, and can abut against the first connecting member to limit the first connecting member.

[0027] Optionally, the first connecting member includes a sleeve portion and a pair of connecting plates, the connecting plate is arranged parallel to one side of the sleeve portion, the sleeve portion is sleeved on the second foot rod, a first hinged connection hole is formed in the connecting plate, a second hinged connection hole is formed at the top end of the first foot rod, the top end of the first foot rod is located between the connecting plates, and the top end of the first foot rod is hinged to the connecting plate via a connecting member passing through the first hinged connection hole and the second hinged connection hole.

[0028] Optionally, the top end of the second foot rod is bent, and the first connecting member is arranged between the bending part of the second foot rod and the bottom end of the second foot rod.

[0029] Optionally, the connecting assembly includes a second connecting rod arranged crosswise, the top of the second connecting rod is hinged to the seat rods on both sides respectively, and the bottom of the second connecting rod is hinged to the second foot rod on the opposite side;

[0030] The top end of the second connecting rod is bent toward a side away from the second connecting rod on the opposite side to form a handle portion.

[0031] Optionally, the connecting assembly includes cross-arranged second connecting rods, the top ends of the second connecting rods are respectively hinged to the seat rods on both sides, and the bottom ends of the second connecting rods are hinged to the second foot rods on the opposite sides.

[0032] Optionally, the movable chair frame also includes a second hinge, the top of the first connecting rod is hinged to the seat rod through the second hinge, the first hinge includes a third hinge plate and a fourth hinge plate, a fifth hinge hole is formed on the side of the seat rod facing the opposite side of the seat rod, a sixth hinge hole is formed in the third hinge plate, the second hinge part is hinged to the third hinge plate through a connector passing through the fifth hinge hole and the sixth hinge hole, and the top end of the second connecting rod is hinged to the fourth hinge plate.

[0033] Optionally, the bottom end of the second connecting rod is hinged to the bottom end of the second foot rod.

[0034] Optionally, the bottom end of the second connecting rod is hinged to the bottom end of the second foot rod through the corresponding second foot piece.

[0035] Optionally, the movable chair frame also includes an armrest rod, a support rod and a third connecting member, one end of the armrest rod is hinged to the first connecting member, the bottom of the armrest rod has a slide groove extending along the extension direction of the armrest rod, the support rod is hinged to the seat rod, and the top end of the support rod is slidably arranged in the slide groove, the bottom end of the support rod is hinged to the third connecting member, and the third connecting member is mounted on the second foot rod and can slide along the second foot rod.

[0036] Optionally, a second limiting hole is formed on the second foot rod, a second limiting nail is arranged in the second limiting hole, the second limiting nail is located between the third connecting member and the bottom end of the second foot rod, and is used to limit the third connecting member.

[0037] As a second aspect of the utility model, a folding chair is provided, comprising a seat cushion, a backrest and the aforementioned movable chair frame, wherein the seat cushion is fixed between the seat rods of the movable chair frame, and the backrest is fixed between the back support rods of the movable chair frame.

[0038] In the movable chair frame provided by the utility model, a second connecting piece is provided at the top end of the second leg rod, and the back support rod is hinged to the second leg rod through the second connecting piece, so that the backrest fixed on the back support rod can rotate around the top end of the second leg rod, and then when the user lies on the folding chair, the backrest angle can be flexibly adjusted according to the user's own needs. Specifically, when the user wants to lie down backward, he can fall back on the backrest to make the top end of the back support rod rotate backward. When the user sits up straight, the back support rod can also adapt to the user's posture changes and the bottom end rotates backward. Therefore, the back support rod and the backrest fixed thereon can follow the different posture angles of the human body, fit closely to the user's back and support the user's body, thereby ensuring the user's flexibility in adjusting the sitting posture and improving the user's experience.

[0039] In addition, the back support rod is hinged to the second foot rod only through a single second connecting member, and the structure is simple and easy to disassemble and maintain. The back support rod will not interfere with other rods during the folding process, thereby ensuring the smoothness of the folding action of the folding chair. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The utility model is further described below in conjunction with the accompanying drawings:

[0041] Figure 1 It is a schematic diagram of the structure of the movable chair frame back support rod provided by the embodiment of the utility model in the reclining state;

[0042] Figure 2 yes Figure 1 Side view of the middle movable chair frame;

[0043] Figure 3 It is a schematic diagram of the structure of the movable chair frame provided by the embodiment of the utility model in a forward-leaning state of the back support rod;

[0044] Figure 4 yes Figure 3 Side view of the middle movable chair frame;

[0045] Figure 5 yes Figure 1 A partial enlarged schematic diagram of the structure of the middle movable chair frame A area;

[0046] Figure 6 It is a schematic diagram of the relative position between the back support rod and the second connecting member in the movable chair frame provided by the embodiment of the utility model in the forward tilted state;

[0047] Figure 7It is a schematic diagram of the relative position between the back support rod and the second connecting member in the movable chair frame provided by the embodiment of the utility model in the reclining state;

[0048] Figure 8 It is a structural schematic diagram of a first connecting member in a movable chair frame provided in an embodiment of the utility model;

[0049] Figures 9 and 10 It is a schematic diagram of the folding principle of the movable chair frame provided by the embodiment of the utility model;

[0050] Fig.11 It is a schematic diagram of the structure of the movable chair frame back support rod provided by the embodiment of the utility model in the reclining state;

[0051] Fig.12 yes Fig.11 Side view of the middle movable chair frame;

[0052] Fig.13 It is a schematic diagram of the structure of the movable chair frame provided by the embodiment of the utility model in a forward-leaning state of the back support rod;

[0053] Fig.14 yes Fig.13 Side view of the movable chair frame.

[0054] Description of reference numerals:

[0055] The support rod assembly 100, the first foot rod 110, the second foot rod 120, the first limiting hole 121, the second limiting hole 122, the seat rod 130, the back support rod 140, the connecting assembly 200, the first connecting rod 210, the second connecting rod 220, the first connecting member 300, the sleeve portion 310, the connecting plate 320, the second connecting member 400, the mounting sleeve 410, the first hinge portion 420, the hinge portion body 421, the hinge boss 422, the first hinge hole 423, The limiting platform 430, the matching inclined surface 431, the accommodating groove 432, the avoiding cavity 433, the second hinge part 440, the third hinge hole 441, the first fastener 451, the second fastener 452, the first foot member 510, the second foot member 520, the first hinge member 610, the first hinge plate 611, the second hinge plate 612, the second hinge member 620, the handrail assembly 700, the handrail rod 710, the slide groove 711, the support rod 720, the third connecting member 730, DETAILED DESCRIPTION

[0056] The following is a detailed description of embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments in the implementation manner are intended to be used to explain the present invention and should not be construed as limiting the present invention.

[0057] References to "one embodiment" or "an example" or "an example" in this specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment itself may be included in at least one embodiment disclosed in the present utility model. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0058] In the related art, the backrest of a folding chair is usually kept at a fixed angle after being unfolded, so no matter how the user moves, the angle of the back is fixed when lying in the folding chair, making it difficult to effectively adjust the sitting posture to resist fatigue.

[0059] In order to solve the above technical problems, as one aspect of the utility model, a movable chair frame of a folding chair is provided, such as Figures 1 to 4 , Figures 11 to 14 As shown, the movable chair frame includes a pair of support rods 100 and a connecting assembly 200 connected between the support rods 100, the support rods 100 include a first foot rod 110, a second foot rod 120, a seat rod 130 and a back support rod 140, the seat rod 130 is used to fix the seat cushion of the folding chair, the top of the first foot rod 110 is provided with a first connecting member 300, the second foot rod 120 is connected to the top of the first foot rod 110 through the first connecting member 300, the bottom ends of the first foot rod 110 and the bottom ends of the second foot rod 120 are both formed as the bottom feet of the movable chair frame, and the seat rod 130 is connected to the first foot rod 110 and the second foot rod 120;

[0060] A second connecting member 400 is disposed at the top end of the second foot rod 120 , and the back support rods 140 are hinged to the second connecting member 400 , so that the backrest fixed between the back support rods 140 can rotate.

[0061] In the movable chair frame provided by the present invention, the seat rod 130 is used to fix the seat cushion, the back support rod 140 is used to fix the backrest, the bottom ends of the first foot rod 110 and the second foot rod 120 are respectively supported in front and behind the center of gravity of the movable chair frame, so as to form a folding chair structure, and a second connecting member 400 is provided at the top end of the second foot rod 120, and the back support rod 140 is hinged to the second foot rod 120 through the second connecting member 400, so that the backrest fixed on the back support rod 140 can rotate around the top end of the second foot rod 120, and then when the user lies on the folding chair, the backrest angle can be flexibly adjusted according to the user's own needs. Specifically, when the user wants to lie down backwards, he can fall backwards on the backrest to make the top end of the back support rod 140 rotate backwards, such as Figure 1 , Figure 2 , Fig.11 , Fig.12 When the user sits upright, the back support rod 140 can also adapt to the user's posture changes, and the bottom end rotates backward to Figure 3 , Figure 4 , Fig.13 , Fig.14In the state shown, the back support rod 140 and the backrest fixed thereon can follow different posture angles of the human body, fit closely to the user's back and support the user's body, thereby ensuring the user's flexibility in adjusting the sitting posture and improving the user's experience.

[0062] In addition, the back support rod 140 is hinged to the second foot rod 120 only through a single second connecting member 400, and the structure is simple and easy to disassemble and maintain. In addition, the back support rod 140 will not interfere with other rods during the folding process, thereby ensuring the smoothness of the folding action of the folding chair.

[0063] As an optional implementation of the present utility model, Figures 1 to 4 , Figures 11 to 14 As shown, the top end of the second foot bar 120 passes through the first connecting member 300 , the second foot bar 120 is hingedly connected to the top end of the first foot bar 110 through the first connecting member 300 and can slide in the first connecting member 300 , and the seat bar 130 is hingedly connected to the first foot bar 110 and the second foot bar 120 .

[0064] When you need to fold up the folding chair, Figures 9 and 10 As shown (the direction of the arrow in the figure is the driving and rotation direction of each rod), the second foot rod 120 slides upward in the first connecting member 300, while driving the seat rod 130, and finally the second foot rod 120 and the seat rod 130 are rotated to be close to the first foot rod 110; when the folding chair is unfolded, the transformation action of the movable chair frame is opposite, which will not be repeated here.

[0065] As an optional implementation of the present utility model, Figures 1 to 4 , Figures 11 to 14 As shown, the cross-sectional shape of each rod in the support rod group 100 is circular (ie, a round tube).

[0066] As a preferred embodiment of the present invention, Figures 1 to 4 , Figures 11 to 14 As shown, a first foot piece 510 is disposed at the bottom end of the first foot rod 110. The first foot piece 510 is made of plastic, thereby reducing the pressure of the bottom of the folding chair on the ground through the bottom plastic piece, protecting the ground structure and ensuring the service life of the folding chair.

[0067] As an optional embodiment of the present invention, the bottom of the first base member 510 has a first anti-slip contact surface, and a plurality of first anti-slip grooves 711 arranged in parallel and spaced apart are formed on the first anti-slip contact surface, thereby further increasing the friction between the bottom of the first base member 510 and the ground, ensuring the grip effect of the folding chair, and further ensuring the stability of the folding chair.

[0068] Similarly, as a preferred embodiment of the present invention, a second foot piece 520 is disposed at the bottom end of the second foot rod 120 , and the material of the second foot piece 520 is plastic.

[0069] As an optional embodiment of the present invention, the bottom of the second base member 520 has a second anti-slip contact surface, and a plurality of second anti-slip grooves 711 arranged in parallel and spaced apart are formed on the second anti-slip contact surface, thereby further increasing the friction between the bottom of the second base member 520 and the ground, ensuring the grip effect of the folding chair, and further ensuring the stability of the folding chair.

[0070] As an optional implementation of the present utility model, Figure 5 As shown, the second connecting member 400 includes a mounting sleeve 410 and a first hinged portion 420 . The mounting sleeve 410 is mounted on the top of the second foot rod 120 . The first hinged portion 420 is fixedly connected to the side of the mounting sleeve 410 . The back support rod 140 is hinged to the first hinged portion 420 .

[0071] Specifically, Figure 5 As shown, a first hinge hole 423 is formed on the side of the first hinge portion 420 facing the second connecting member 400 on the opposite side, a second hinge hole is formed in the back support rod 140, and the back support rod 140 is hinged to the first hinge portion 420 by a fastener passing through the first hinge hole 423 and the second hinge hole in sequence.

[0072] Alternatively, if Figure 5 As shown, the first hinge part 420 includes a hinge part body 421 fixed to the side of the mounting sleeve 410 and a hinge boss 422 formed on the hinge part body 421 and protruding toward the opposite side of the second connecting member 400, and a first hinge hole 423 is formed on the hinge boss 422.

[0073] In order to improve the structural strength of the second connecting member 400, as a preferred embodiment of the present invention, Figure 5 As shown, a reinforcing rib 424 is provided between the side wall of the mounting sleeve 410 and the top of the first hinge portion 420 .

[0074] As a preferred embodiment of the present invention, Figure 5 As shown, a limiting platform 430 is also fixedly provided on the side of the mounting sleeve 410 facing the opposite second connecting member 400, and the first hinge portion 420 is located on the side of the limiting platform 430 close to the bottom end of the second leg rod 120. The limiting platform 430 can abut against the back support rod 140 when the top end of the back support rod 140 rotates away from the bottom end of the second leg rod 120 to limit the rotation angle of the back support rod 140.

[0075] In the embodiment of the utility model, a limiting platform 430 is fixedly provided on the installation sleeve 410. Figure 6 to Figure 7 As shown, the limiting platform 430 can abut against the back support rod 140 when the backrest is reclined, thereby preventing the user from lying down too much and losing balance, thereby ensuring the safety of the user when using the folding chair.

[0076] In order to disperse the load of the back support rod 140 and reduce the stress concentration on the limit platform 430, as an optional implementation of the utility model, Figure 5 As shown, the limiting platform 430 has a matching inclined surface 431 on the side facing the back support rod 140 , and the angle of the matching inclined surface 431 corresponds to the angle when the back support rod 140 rotates to contact the limiting platform 430 .

[0077] In order to further reduce the stress concentration on the limiting platform 430, as an optional implementation of the utility model, Figure 5 As shown, an accommodating groove 432 is formed on the matching inclined surface 431. When the back support rod 140 is rotated to contact with the limit platform 430, it is partially accommodated in the accommodating groove 432, so that the back support rod 140 is evenly supported by the arc-shaped inner wall of the accommodating groove 432, further dispersing the stress on the limit platform 430.

[0078] As an optional implementation of the present utility model, Figure 5 As shown, an avoidance cavity 433 is formed in the limiting platform 430 , and at least one first fastener 451 is disposed in the avoidance cavity 433 . The first fastener 451 passes through a through hole penetrating the side wall of the mounting sleeve 410 and is fixedly connected to the second foot rod 120 .

[0079] As an optional implementation of the present utility model, Figure 5 As shown, at least one second fastener 452 is also disposed on the second connecting member 400 . The second fastener 452 passes through a through hole penetrating the side wall of the mounting sleeve 410 and is fixedly connected to the second foot rod 120 .

[0080] In some optional embodiments of the present invention, the folding chair using the movable chair frame provided by the present invention can be a flat-folding chair, that is, the connecting assembly 200 connected between the two sets of support rod groups 100 is a fixed structure, and the folding chair can only be folded by the relative movement between the support rods in the support rod group 100.

[0081] Alternatively, in order to further reduce the space occupied by the folding chair in the folded state, as a preferred embodiment of the utility model, Figure 5 As shown, the second connecting member 400 further includes a second hinge portion 440, and the second hinge portion 440 is fixedly connected to the side of the installation sleeve 410 (and is located on the side of the installation sleeve 410 away from the first hinge portion 420);

[0082] like Figures 1 to 4 , Figures 11 to 14As shown, the connecting assembly 200 includes a cross-arranged first connecting rod 210, the top end of the first connecting rod 210 is hinged to the second hinged portion 440 of the second connecting member 400 on both sides, and the bottom end of the first connecting rod 210 is hinged to the bottom end of the first foot rod 110 on the opposite side.

[0083] In the embodiment of the present invention, the connecting assembly 200 includes a first connecting rod 210 arranged crosswise. When the folding chair is folded, Figures 9 and 10 As shown, the two ends of the first connecting rod 210 are pulled to the upper and lower sides respectively, so that the two first connecting rods 210 are close to parallel, so as to bring the two groups of support rods 100 together, thereby achieving the synchronous tightening of the folding chair along the width direction, and further reducing the space occupied by the folding chair in the folded state.

[0084] As an optional implementation of the present utility model, Figures 1 to 5 , Figures 11 to 14 As shown, the movable chair frame also includes a first hinge 610, the top end of the first connecting rod 210 is hinged to the second hinge portion 440 of the second connecting member 400 through the first hinge 610, the first hinge 610 includes a first hinge plate 611 and a second hinge plate 612, the second hinge portion 440 is hinged to the first hinge plate 611, and the top end of the first connecting rod 210 is hinged to the second hinge plate 612.

[0085] Specifically, Figure 5 As shown, a third hinge hole 441 is formed on the side of the second hinge portion 440 facing the opposite second connecting member 400, a fourth hinge hole is formed in the first hinge plate 611, and the second hinge portion 440 is hinged to the first hinge plate 611 via a connecting member passing through the fourth hinge hole and the third hinge hole 441.

[0086] As an optional implementation of the present utility model, Figures 1 to 4 , Figures 11 to 14 As shown, the bottom end of the first connecting rod 210 is hinged to the bottom end of the first foot rod 110 through the corresponding first foot piece 510 .

[0087] As an optional implementation of the present utility model, Figure 8 As shown, a first limiting hole 121 is formed on the second foot rod 120, and a first limiting nail (not shown in the figure) is arranged in the first limiting hole 121. The first limiting nail is located between the first connecting member 300 and the top end of the second foot rod 120, and can abut against the first connecting member 300 to limit the first connecting member 300, thereby achieving the limitation of the maximum opening angle of the folding chair.

[0088] As an optional implementation of the present utility model, Figure 8As shown, the first connecting member 300 includes a sleeve portion 310 and a pair of connecting plates 320. The connecting plate 320 is arranged in parallel on one side of the sleeve portion 310. The sleeve portion 310 is sleeved on the second leg rod 120. A first hinged connection hole is formed in the connecting plate 320. A second hinged connection hole is formed at the top end of the first leg rod 110. The top end of the first leg rod 110 is located between the connecting plates 320, and the top end of the first leg rod 110 is hinged to the connecting plate 320 through a connecting member passing through the first hinged connection hole and the second hinged connection hole.

[0089] As an optional implementation of the present utility model, Figures 1 to 4 , Figures 11 to 14 As shown, the top end of the second leg rod 120 is bent, and the first connecting member 300 is disposed between the bending portion of the second leg rod 120 and the bottom end of the second leg rod 120 .

[0090] As an optional implementation of the present utility model, Figures 1 to 4 , Figures 11 to 14 As shown, the connection assembly 200 also includes a cross-arranged second connection rod 220, the top of the second connection rod 220 is hinged to the seat rod 130 on both sides, and the bottom of the second connection rod 220 is hinged to the second foot rod 120 on the opposite side.

[0091] In the embodiment of the utility model, the connecting assembly 200 includes a second connecting rod 220 arranged crosswise. When the folding chair is folded, Figures 9 and 10 As shown, the two ends of the second connecting rod 220 are pulled to the upper and lower sides respectively, so that the two second connecting rods 220 are close to parallel, thereby realizing the folding of the two support rod groups 100.

[0092] As an optional implementation of the present utility model, Figures 1 to 4 As shown, the top end of the second connecting rod 220 is bent toward a side away from the opposite second connecting rod 220 to form a handle portion.

[0093] As an optional implementation of the present utility model, Figures 1 to 4 , Figures 11 to 14 As shown, the movable chair frame also includes a second hinge 620, the top of the first connecting rod 210 is hinged to the seat rod 130 through the second hinge 620, the first hinge 610 includes a third hinge plate and a fourth hinge plate, a fifth hinge hole is formed on the side of the seat rod 130 facing the opposite seat rod 130, a sixth hinge hole is formed in the third hinge plate, the second hinge part 440 is hinged to the third hinge plate through a connector passing through the fifth hinge hole and the sixth hinge hole, and the top of the second connecting rod 220 is hinged to the fourth hinge plate.

[0094] As an optional implementation of the present utility model, Figures 11 to 14As shown, the bottom end of the second connecting rod 220 is hinged to the bottom end of the second foot rod 120 .

[0095] As an optional implementation of the present utility model, Figures 11 to 14 As shown, the bottom end of the second connecting rod 220 is hinged to the bottom end of the second foot rod 120 through the corresponding second foot piece 520 .

[0096] As an optional implementation of the present utility model, Figures 11 to 14 As shown, the movable chair frame also includes an armrest assembly 700, which includes an armrest rod 710 (i.e., an armrest), a support rod 720 and a third connecting member 730. One end of the armrest rod 710 is hinged to the first connecting member 300, and the bottom of the armrest rod 710 has a slide groove 711 extending along the extension direction of the armrest rod 710. The support rod 720 is hinged to the seat rod 130, and the top end of the support rod 720 is slidably set in the slide groove 711. The bottom end of the support rod 720 is hinged to the third connecting member 730, and the third connecting member 730 is mounted on the second foot rod 120 and can slide along the second foot rod 120.

[0097] In some embodiments of the present invention, Fig.11 , Fig.13 As shown, the armrest bar 710 can be flat to reduce the pressure between the armrest and the user's arm and improve comfort.

[0098] As an optional implementation of the present utility model, Figures 11 to 14 As shown, a second limiting hole 122 is formed on the second foot rod 120, and a second limiting nail is arranged in the second limiting hole 122. The second limiting nail is located between the third connecting member 730 and the bottom end of the second foot rod 120, and is used to limit the third connecting member 730, thereby preventing the third connecting member 730 from sliding downward, thereby ensuring the load-bearing capacity of the handrail rod 710.

[0099] As a second aspect of the utility model, a folding chair is provided, comprising a seat cushion, a backrest and a front movable chair frame, wherein the seat cushion is fixed between seat rods 130 of the movable chair frame, and the backrest is fixed between back support rods 140 of the movable chair frame.

[0100] In the folding chair provided by the present invention, a second connecting piece 400 is provided at the top of the second leg rod 120, and the back support rod 140 is hinged to the second leg rod 120 through the second connecting piece 400, so that the backrest fixed on the back support rod 140 can rotate around the top of the second leg rod 120, and then when the user lies on the folding chair, the backrest angle can be flexibly adjusted according to the user's needs, so that the back support rod 140 and the backrest can follow the different posture angles of the human body, close to the user's back and support the user's body, ensuring the user's flexibility in adjusting the sitting posture and improving the user's experience.

[0101] In addition, the back support rod 140 is hinged to the second foot rod 120 only through a single second connecting member 400, and the structure is simple and easy to disassemble and maintain. In addition, the back support rod 140 will not interfere with other rods during the folding process, thereby ensuring the smoothness of the folding action of the folding chair.

[0102] As an optional implementation manner of the present utility model, the seat cushion and the backrest are connected as one body.

[0103] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention shall be included in the scope of the claims.

Claims

1. A movable chair frame, characterized in that: The movable chair frame comprises a pair of support rods and a connecting assembly connected between the support rods, the support rods comprising a first foot rod, a second foot rod, a seat rod and a back support rod, the seat rod is used to fix the seat cushion of the folding chair, the top of the first foot rod is provided with a first connecting piece, the second foot rod is connected to the first foot rod through the first connecting piece, the bottom ends of the first foot rod and the second foot rod are both formed as the bottom feet of the movable chair frame, and the seat rod is connected to the first foot rod and the second foot rod; A second connecting piece is arranged at the top end of the second foot rod, and the back support rod is hinged to the second connecting piece so that the backrest fixed between the back support rods can rotate.

2. The movable chair frame according to claim 1, characterized in that: The second connecting member includes a mounting sleeve and a first hinged portion, the mounting sleeve is arranged on the top end of the second foot rod, the first hinged portion is fixedly connected to the side of the mounting sleeve, and the back support rod is hinged to the first hinged portion.

3. The movable chair frame according to claim 2, characterized in that: A limiting platform is also fixedly provided on the side of the mounting sleeve facing the opposite second connecting member, and the first hinged portion is located on the side of the limiting platform close to the bottom end of the second leg rod. The limiting platform can abut against the back support rod when the top end of the back support rod rotates away from the bottom end of the second leg rod to limit the rotation angle of the back support rod.

4. The movable chair frame according to claim 3, characterized in that: The limiting platform has a matching inclined surface on one side facing the back support rod, and the angle of the matching inclined surface corresponds to the angle when the back support rod is rotated to contact the limiting platform.

5. The movable chair frame according to claim 4, characterized in that: An accommodating groove is formed on the matching inclined surface, and when the back support rod is rotated to contact the limiting platform, a portion of the back support rod is matched and accommodated in the accommodating groove.

6. The movable chair frame according to claim 3, characterized in that: An avoidance cavity is formed in the limit platform, and at least one first fastener is arranged in the avoidance cavity. The first fastener passes through a through hole penetrating the side wall of the mounting sleeve and is fixedly connected to the second foot rod.

7. The movable chair frame according to claim 1, characterized in that: The second connecting member comprises a mounting sleeve and a second hinged portion, wherein the mounting sleeve is mounted on the top end of the second foot rod, and the second hinged portion is fixedly connected to the side of the mounting sleeve; The connecting assembly includes a first connecting rod arranged crosswise, the top end of the first connecting rod is hinged to the second hinged parts of the second connecting members on both sides respectively, and the bottom end of the first connecting rod is hinged to the bottom end of the first foot rod on the opposite side.

8. The movable chair frame according to any one of claims 1 to 7, characterized in that: The top end of the second foot bar passes through the first connecting member, the second foot bar is hinged to the top end of the first foot bar through the first connecting member and can slide in the first connecting member, and the seat bar is hingedly connected to the first foot bar and the second foot bar.

9. The movable chair frame according to claim 8, characterized in that: A first limiting hole is formed on the second foot rod, a first limiting nail is arranged in the first limiting hole, the first limiting nail is located between the first connecting member and the top end of the second foot rod, and can abut against the first connecting member to limit the first connecting member.

10. The movable chair frame according to any one of claims 1 to 7, characterized in that: The connecting assembly comprises a second connecting rod arranged crosswise, the top of the second connecting rod is hinged to the seat rods on both sides respectively, and the bottom end of the second connecting rod is hinged to the second foot rod on the opposite side; The top end of the second connecting rod is bent toward a side away from the second connecting rod on the opposite side to form a handle portion.

11. A folding chair, characterized in that: It comprises a seat cushion, a backrest and a movable chair frame as described in any one of claims 1 to 10, wherein the seat cushion is fixed between seat rods of the movable chair frame, and the backrest is fixed between back support rods of the movable chair frame.

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