Improved folding chair

Abstract

The utility model discloses an improved folding chair which comprises a supporting assembly, a connecting plate and a seat plate, the supporting assembly comprises a first support and a second support, the middle of the first support and the middle of the second support are mutually hinged to form an X shape, placing blocks are arranged on the bottom faces of the first support and the second support, and the connecting plate comprises a first connecting piece and two second connecting pieces. One end of the first connecting piece is rotatably connected with the upper end of the first support, one ends of the two second connecting pieces are rotatably connected with the upper end of the second support, the other end of the first connecting piece is pivotally connected with the other ends of the two second connecting pieces, the seat plate is arranged above the connecting plate, and one end of the seat plate is pivotally connected with the other end of the first connecting piece. An elastic locking device is arranged on the first connecting piece, when the seat plate is horizontally arranged on the connecting plate, the clamping piece is inserted into the elastic locking device, resistance is applied to rotation of the seat plate, one side of the clamping piece abuts against the second support at the same time, the supporting assembly is fixed in an unfolded state, and the foldable seat is compact in structure and convenient to fold.

Description

Technical Field

[0001] The utility model relates to the field of seats, and in particular to an improved folding chair. Background Art

[0002] At present, most of the folding chairs on the market have a foldable bracket under the seat plate, but the adjustment operation is often too complicated, and the components are easily damaged after long-term use. The durability is not ideal. In addition, after folding, the seat plate and the bottom bracket cannot be completely close together, and the space occupied after folding is large, which is not conducive to storage and carrying. In addition, the seat plates of existing folding chairs are simply placed above the bracket, and their horizontal state is not firmly fixed, which is easy to accidentally flip and loosen.

[0003] Therefore, it is necessary to make further improvements in the prior art. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the purpose of the utility model is to provide an improved folding chair.

[0005] To achieve the above-mentioned purpose, an improved folding chair according to an embodiment of the utility model includes a support assembly, a connecting plate and a seat plate.

[0006] The support assembly includes a first bracket and a second bracket, wherein the first bracket and the second bracket are hinged to each other at the middle to form an "X" shape.

[0007] The connecting plate includes a first connecting plate and two second connecting plates, one end of the first connecting plate is rotatably connected to the upper end of the first bracket, one end of the two second connecting plates is rotatably connected to the upper end of the second bracket, and the other end of the first connecting plate is pivotally connected to the other ends of the two second connecting plates.

[0008] The seat plate is arranged above the connecting plate, and one end is pivotally connected to the other end of the first connecting piece, and a clamping piece is arranged on the bottom surface of the seat plate.

[0009] Among them, an elastic locking device is provided on the first connecting plate. When the seat plate is placed horizontally on the connecting plate, the clamping member is inserted into the elastic locking device to apply resistance to the rotation of the seat plate, and one side of the clamping member simultaneously abuts against the upper end of the second bracket to fix the support assembly in the expanded state.

[0010] In addition, the improved folding chair according to the above embodiment of the utility model may also have the following additional technical features:

[0011] According to an embodiment of the utility model, the first bracket and the second bracket each include two opposite support rods and a top rod, and the top rod is connected between the tops of the two opposite support rods to form a "U"-shaped structure.

[0012] One of the two support rods in the first bracket is hinged to one of the two support rods in the second bracket to form an "X"-shaped structure, and the other of the two support rods in the first bracket is hinged to the other of the two support rods in the second bracket to form an "X"-shaped structure.

[0013] One end of the first connecting piece is hinged to the top rod in the first bracket, and one end of the second connecting piece is hinged to the top rod in the second bracket.

[0014] According to an embodiment of the present invention, the first connecting sheet includes a first sheet body, a second sheet body and a third sheet body.

[0015] One end of the first sheet extends to the upper end of the first bracket, and a notch is formed at one end of the first sheet.

[0016] The second sheet is disposed in the notch, and one end of the second sheet is pivotally connected to the first sheet, and the other end of the second sheet is pivotally connected to the upper end of the first bracket.

[0017] The third sheet is integrally formed at the other end of the first sheet, the other end of the third sheet is pivotally connected to the bottom surface of the seat plate, and the third sheet is located between the two second connecting sheets.

[0018] According to an embodiment of the utility model, the elastic locking device includes a housing, a sliding block and a spring member.

[0019] The shell is arranged on the bottom surface of the first connecting piece, and a side of the shell facing the second bracket is formed to be open.

[0020] The sliding block is slidably disposed in the housing.

[0021] The spring element is arranged in the housing, between the inner wall and the end surface of the sliding block.

[0022] Among them, a through slot is provided on the first connecting plate, one end of the sliding block extends to the bottom of the through slot, the bottom surface of the clamping piece is formed as an inclined surface, and an arc-shaped protrusion is formed on the side opposite to the sliding block. When the seat plate is placed horizontally on the connecting plate, the lower end of the clamping piece passes through the through slot and moves to the bottom of the sliding block, and the arc-shaped protrusion abuts against the bottom surface of the sliding block.

[0023] According to an embodiment of the utility model, a chair back is also included, and an extension column is provided on both sides of the upper end of the first bracket. The extension column extends vertically, and the lower end of the chair back is connected to the extension column.

[0024] According to one embodiment of the utility model, support plates are provided on the sides of the two extension columns, and two rotating plates are provided on the back of the chair back. The two rotating plates and the two supporting plates are rotatably connected one by one so that the chair back can pivot along the connection between the rotating plates and the supporting plates.

[0025] According to an embodiment of the utility model, through holes are provided at the lower ends of both sides of the chair back, and locking posts are provided in the two through holes, and the locking posts can slide along the length direction of the through holes;

[0026] The upper end surfaces of the two extension columns are provided with locking holes. When the chair back is pivoted to the vertical direction, the lower ends of the locking columns slide into the locking holes due to the action of gravity.

[0027] According to one embodiment of the utility model, a first cross bar is arranged between the lower halves of the two support rods in the first bracket, a second cross bar is arranged between the lower halves of the two support rods in the second bracket, and a third connecting piece is connected between the first cross bar and the second cross bar.

[0028] The third connecting plate includes a fourth plate, a fifth plate and a limiting plate. One end of the fourth plate is rotatably connected to the first cross bar, one end of the fifth plate is rotatably connected to the second cross bar, the other end of the fourth plate is pivotally connected to the other end of the fifth plate, and the limiting plate is arranged on the fourth plate to limit the upward rotation of the fifth plate.

[0029] According to an embodiment of the present invention, the limiting piece is integrally provided with the fourth piece body, and a portion thereof extends to above the fifth piece body.

[0030] According to the improved folding chair provided by the embodiment of the utility model, the design of "X" shape is formed by the mutual hinged connection of the first bracket and the middle part of the second bracket, so that the folding chair can form a stable supporting structure when unfolded, and is convenient for folding and storage, thereby improving the convenience of use and the efficiency of space utilization. The elastic locking device arranged on the first connecting plate cooperates with the clamping piece on the bottom surface of the seat plate. When the seat plate is placed horizontally on the connecting plate, the clamping piece can be automatically inserted into the elastic locking device, which not only effectively prevents the accidental rotation of the seat plate, but also abuts against the upper end of the second bracket through the clamping piece, thereby further enhancing the stability and safety of the folding chair in the unfolded state.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 It is a schematic diagram of the overall structure in an embodiment of the utility model;

[0034] Figure 2 This is another schematic diagram of the overall structure in the embodiment of the utility model;

[0035] Figure 3 It is a state diagram of the overall structure change in the embodiment of the utility model;

[0036] Figure 4 This is another changing state diagram of the overall structure in the embodiment of the utility model;

[0037] Figure 5 This is a schematic diagram of the overall structure of the connecting plate in the embodiment of the utility model;

[0038] Figure 6 It is a cross-sectional view of the overall structure in the embodiment of the utility model;

[0039] Figure 7 This is a diagram of the overall structure in the folded state in the embodiment of the utility model;

[0040] Figure 8 This utility model embodiment Figure 4 Enlarged view of part A in the middle;

[0041] Fig. 9 This is a schematic diagram of the overall structure of the third connecting piece in the embodiment of the utility model;

[0042] Fig.10 This utility model embodiment Figure 6 Enlarged view of part B.

[0043] Figure Number:

[0044] Support assembly 10;

[0045] A first bracket 101;

[0046] Support rod 1011;

[0047] Ejector rod 1012;

[0048] first crossbar 1013;

[0049] A second bracket 102;

[0050] A second crossbar 1021;

[0051] Extension column 103;

[0052] Support sheet 1031;

[0053] Locking hole 1032;

[0054] A third connecting piece 104;

[0055] The fourth sheet 1041;

[0056] The fifth sheet 1042;

[0057] Limiting piece 1043;

[0058] Connecting plate 20;

[0059] A first connecting piece 201;

[0060] First piece 2011;

[0061] The second piece 2012;

[0062] The third piece 2013;

[0063] Tongslot 2014;

[0064] A second connecting piece 202;

[0065] Seat plate 30;

[0066] A clamping member 301;

[0067] Arc-shaped protrusion 3011;

[0068] Elastic locking device 40;

[0069] Housing 401;

[0070] Slider 402;

[0071] Spring member 403;

[0072] Chair back 50;

[0073] Rotating piece 501;

[0074] Locking post 502.

[0075] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0076] The embodiments of the utility model are described in detail below, and examples of the embodiments 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 described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0077] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0078] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0079] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0081] The improved folding chair according to the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0082] Reference Figures 1 to 10 As shown, the improved folding chair provided according to the embodiment of the utility model includes a support assembly 10, a connecting plate 20 and a seat plate 30.

[0083] The support assembly 10 includes a first bracket 101 and a second bracket 102, wherein the first bracket 101 and the second bracket 102 are hinged to each other at the middle to form an "X" shape. Placement blocks are horizontally arranged on the bottom surfaces of the first bracket 101 and the second bracket 102 to make their placement more stable.

[0084] The connecting plate 20 includes a first connecting piece 201 and two second connecting pieces 202, wherein one end of the first connecting piece 201 is rotatably connected to the upper end of the first bracket 101, one end of the two second connecting pieces 202 is rotatably connected to the upper end of the second bracket 102, and the other end of the first connecting piece 201 is pivotally connected to the other ends of the two second connecting pieces 202.

[0085] The seat plate 30 is disposed above the connecting plate 20 , and one end of the seat plate 30 is pivotally connected to the other end of the first connecting piece 201 . A clamping member 301 is disposed on the bottom surface of the seat plate 30 .

[0086] Among them, an elastic locking device 40 is provided on the first connecting plate 201. When the seat plate 30 is horizontally placed on the connecting plate 20, the clamping member 301 is inserted into the elastic locking device 40 to apply resistance to the rotation of the seat plate 30, and one side of the clamping member 301 simultaneously abuts against the upper end of the second bracket 102 to fix the support assembly 10 in the unfolded state.

[0087] Based on the above, the design of the "X" shape formed by the mutual hinged connection of the first bracket 101 and the second bracket 102 in the middle allows the folding chair to form a stable support structure when unfolded, and is easy to fold and store, thereby improving the convenience of use and the efficiency of space utilization. The elastic locking device 40 provided on the first connecting plate 201 cooperates with the clamping piece 301 on the bottom surface of the seat plate 30. When the seat plate 30 is placed horizontally on the connecting plate 20, the clamping piece 301 can be automatically inserted into the elastic locking device 40, which not only effectively prevents the accidental rotation of the seat plate 30, but also supports the upper end of the second bracket 102 through the clamping piece 301, thereby further enhancing the stability and safety of the folding chair in the unfolded state.

[0088] Preferably, in an embodiment of the present invention, the first bracket 101 and the second bracket 102 each include two opposite support rods 1011 and a top rod 1012, and the top rod 1012 is connected between the tops of the two opposite support rods 1011 to form a "U"-shaped structure.

[0089] One of the two support rods 1011 in the first bracket 101 is hinged to one of the two support rods 1011 in the second bracket 102 to form an "X"-shaped structure, and the other support rod 1011 in the first bracket 101 is hinged to the other support rod 1011 in the second bracket 102 to form an "X"-shaped structure.

[0090] One end of the first connecting piece 201 is hinged to the top rod 1012 in the first bracket 101, and one end of the second connecting piece 202 is hinged to the top rod 1012 in the second bracket 102. Preferably, the first bracket 101, the second bracket 102, and the seat plate 30 are made of stainless steel, which is stable and durable, or iron material with painted surface.

[0091] Thus, the first bracket 101 and the second bracket 102 both adopt a "U"-shaped structural design consisting of two opposing support rods 1011 and a top rod 1012. This design not only increases the strength of the bracket, but also enables the entire folding chair to form a more stable support frame when unfolded. At the same time, the two "U"-shaped structures are hinged to each other to form two "X"-shaped structures, which further enhances the stability and durability of the folding chair when bearing weight. Through the carefully designed hinge points, the first bracket 101 and the second bracket 102 can be flexibly folded and unfolded without the need for complicated operations or additional components. This design not only simplifies the use process of the folding chair, but also improves its portability and storage efficiency.

[0092] At the same time, the connecting plate 20 is hinged to the top rods 1012 of the first bracket 101 and the second bracket 102 through its first connecting piece 201 and two second connecting pieces 202, respectively. This design allows the connecting plate 20 to automatically adjust its position following the shape change of the bracket when the folding chair is unfolded, thereby ensuring that the seat plate always remains horizontal or at a desired angle. At the same time, this also provides a more stable support base for the seat plate.

[0093] Advantageously, in one embodiment of the present invention, the first connecting sheet 201 includes a first sheet body 2011 , a second sheet body 2012 and a third sheet body 2013 .

[0094] One end of the first sheet 2011 extends to the upper end of the first bracket 101 , and a notch is formed at one end of the first sheet 2011 .

[0095] The second sheet 2012 is disposed in the notch, and one end of the second sheet 2012 is pivotally connected to the first sheet 2011 , and the other end of the second sheet 2012 is pivotally connected to the upper end of the first bracket 101 .

[0096] The third sheet 2013 is integrally formed at the other end of the first sheet 2011 . The other end of the third sheet 2013 is pivotally connected to the bottom surface of the seat plate 30 . The third sheet 2013 is located between the two second connecting sheets 202 .

[0097] It can be understood that since the second sheet 2012 is arranged in the notch, and one end is pivotally connected to the first sheet 2011, and the other end is pivotally connected to the upper end of the first bracket 101, that is, the first sheet 2011 is connected to the first bracket 101 through the second sheet 2012, and the two second connecting sheets 202 are pivotally connected to the other end of the first sheet 2011, then when the first bracket 101 and the second bracket 102 are folded, the connecting sheet and the second connecting sheet 202 can pivot accordingly, thereby completing the initial folding.

[0098] Furthermore, since the third sheet 2013 is integrally formed at the other end of the first sheet 2011, and the seat plate 30 is suitable for connecting to the other end of the third sheet 2013, when it is necessary to fold, the seat plate can be flipped to a vertical state and lifted upward, and the third sheet 2013 can be pulled, which drives the first connecting sheet 201 and the second connecting sheet 202 to pivot, and then drives the first bracket 101 and the second bracket 102 to fold, which makes folding more convenient and labor-saving. It should be noted that when the entire seat is in the unfolded state, the end of the third sheet 2013 is delayed to the upper end of the second bracket 102, that is, the first connecting sheet 201 is supported by the second bracket 102.

[0099] On the other hand, as described above, the first sheet 2011 is connected to the first bracket 101 through the second sheet 2012. Therefore, when the first connecting sheet 201 and the second connecting sheet 202 are in a folded state (that is, the bottom surfaces of the first connecting sheet 201 and the second connecting sheet 202 are in contact with each other or are as close as possible), the folded connecting plate 20 can be pivoted to one side of the second bracket 102. At this time, the third sheet 2013 is in a horizontal state and is in contact with the upper end of the second bracket 102, and the folded connecting plate 20 can be pivoted downward to make it close to the outer side surface of the second bracket 102. At this time, the seat plate 30 can also be pivoted to be in contact with the connecting plate 20. In this way, the entire seat can be folded, and its individual components have better fit after folding, and the overall volume is smaller, which is more conducive to storage and carrying, and the overall folding process is convenient and fast, saving time and effort.

[0100] According to an embodiment of the present invention, the elastic locking device 40 includes a housing 401 , a sliding block 402 and a spring member 403 .

[0101] The housing 401 is disposed on the bottom surface of the first connecting piece 201 , and a side of the housing 401 facing the second bracket 102 is open.

[0102] The sliding block 402 is slidably disposed in the housing 401 .

[0103] The spring member 403 is disposed in the housing 401 , between the inner wall and the end surface of the sliding block 402 .

[0104] Among them, a through groove 2014 is provided on the first connecting plate 201, one end of the sliding block 402 extends to the bottom of the through groove 2014, the bottom surface of the clamping member 301 is formed as an inclined surface, and an arc-shaped protrusion 3011 is formed on the side opposite to the sliding block 402. When the seat plate 30 is placed horizontally on the connecting plate 20, the lower end of the clamping member 301 passes through the through groove 2014 and moves to the bottom of the sliding block 402, and the arc-shaped protrusion 3011 is abutted against the bottom surface of the sliding block 402.

[0105] It should be noted that the inclination direction of the bottom surface of the clamping member 301 is higher than the side away from the sliding block 402. In this way, when the seat plate 30 rotates toward the connecting plate 20, the inclined surface at the bottom of the clamping member 301 can press the end of the sliding block 402 to make it shrink into the shell 401. At this time, the spring member 403 shrinks accordingly. When the seat plate 30 is attached to the upper surface of the connecting plate 20, the arc-shaped protrusion 3011 moves to the same level as the sliding block 402, and the sliding block 402 is pushed out to abut against the side of the clamping member 301 due to the elastic force of the spring member 403. Then, at this time, the sliding block 402 can limit the arc-shaped protrusion 3011, so that it produces a certain resistance (that is, a certain force is required to lift the seat plate 30), thereby avoiding accidental flipping or movement of the seat plate 30 and enhancing the placement stability of the seat plate 30.

[0106] Preferably, in an embodiment of the present invention, a chair back 50 is further included, and an extension column 103 is provided on both sides of the upper end of the first bracket 101. The extension column 103 extends vertically, and the lower end of the chair back 50 is connected to the extension column 103.

[0107] In this way, the chair back 50 provides back support for the user, so that the pressure on the back and waist can be reduced when sitting for a long time, thereby improving the comfort of use.

[0108] Preferably, in one embodiment of the utility model, support plates 1031 are provided on the sides of the two extension columns 103, and two rotating plates 501 are provided on the back of the chair back 50. The two rotating plates 501 and the two supporting plates 1031 are rotatably connected one by one, so that the chair back 50 can pivot along the connection between the rotating plates 501 and the support plates 1031.

[0109] In this way, by providing a support plate 1031 on the side of the extension column 103 and providing a rotating plate 501 rotatably connected to the back of the seat back 50, the function of the seat back 50 being able to pivot along a specific axis is achieved. Then, when the entire seat is folded, the seat back 50 can be pivoted to fit against the side of the first bracket 101, thereby making the folded seat smaller in size, occupying less space, and being more convenient to store and carry.

[0110] Preferably, in one embodiment of the present utility model, through holes are provided at the lower ends of both sides of the chair back 50, and locking posts 502 are provided in both through holes, and the locking posts 502 can slide along the length direction of the through holes;

[0111] The upper end surfaces of the two extension columns 103 are provided with locking holes 1032 . When the chair back 50 is pivoted to the vertical position, the lower ends of the locking columns 502 slide into the locking holes 1032 due to gravity.

[0112] In this way, the through holes set in both sides of the chair back 50 and the locking posts 502 that can slide along the length direction of the through holes, combined with the locking holes 1032 on the upper end surface of the extension posts 103, provide a reliable fixing mechanism for the chair back 50. When unfolding, the chair back 50 only needs to be pivoted to the vertical direction, so that the locking posts 502 can slide down into the locking holes 1032 due to gravity, thereby completing the locking operation. When the chair back 50 needs to be folded, the folding chair only needs to be turned upside down, so that the locking posts 502 can slide out of the locking holes 1032 to complete the unlocking of the chair back 50. The locking and unlocking method is simple, fast, stable and reliable.

[0113] Advantageously, in order to prevent the locking column 502 from sliding out of the through hole, a limiting ridge can be provided at the rear end of the locking column 502, and a corresponding limiting groove can be provided on the inner wall of the through hole. The limiting ridge can be slidably provided in the limiting groove to limit the travel of the locking column 502.

[0114] Preferably, in one embodiment of the utility model, a first cross bar 1013 is arranged between the lower halves of the two support rods 1011 in the first bracket 101, a second cross bar 1021 is arranged between the lower halves of the two support rods 1011 in the second bracket 102, and a third connecting piece 104 is connected between the first cross bar 1013 and the second cross bar 1021.

[0115] The third connecting plate 104 includes a fourth plate 1041, a fifth plate 1042 and a limiting plate 1043. One end of the fourth plate 1041 is rotatably connected to the first cross bar 1013, one end of the fifth plate 1042 is rotatably connected to the second cross bar 1021, the other end of the fourth plate 1041 is pivotally connected to the other end of the fifth plate 1042, and the limiting plate 1043 is arranged on the fourth plate 1041 to limit the fifth plate 1042 from rotating upward.

[0116] It is clear that the addition of the first crossbar 1013 and the second crossbar 1021 provides additional support for the bottom structure of the folding chair, making the entire bracket system more stable. At the same time, the third connecting piece 104 is rotatably connected to the first crossbar 1013 and the second crossbar 1021 through its fourth piece 1041 and the fifth piece 1042, respectively, to form a stable triangular structure (or similar structure), further enhancing the torsion resistance and load-bearing capacity of the folding chair.

[0117] The setting of the limiting piece 1043 is one of the highlights of this design. It is fixed on the fourth piece 1041 and is used to limit the upward rotation angle of the fifth piece 1042, thereby preventing the folding chair from being unstable or damaged due to excessive expansion during the expansion process. This limiting mechanism not only improves the safety of the folding chair, but also extends its service life.

[0118] Preferably, in an embodiment of the present utility model, the limiting piece 1043 is integrally provided with the fourth piece 1041 , and a portion thereof extends to above the fifth piece 1042 .

[0119] Thus, the integral arrangement of the stopper 1043 and the fourth plate 1041 reduces the connection points between the components, thereby reducing the risk of instability caused by loose or damaged connections. This structural integrity makes the folding chair more reliable and durable during long-term use.

[0120] At the same time, since the limiting piece 1043 extends directly to the top of the fifth piece 1042, it can more accurately control the rotation angle of the fifth piece 1042. This direct and effective limiting effect prevents the fifth piece 1042 from excessively rotating upward during the unfolding process, thereby ensuring the stability and safety of the folding chair. And the user does not need to perform additional operations or adjust the position of the limiting piece 1043, because it is tightly integrated with the fourth piece 1041. During the folding and unfolding process of the folding chair, the limiting piece 1043 will automatically play a role to limit the rotation range of the fifth piece 1042. This simplified operation process improves the user experience.

[0121] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0122] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An improved folding chair, characterized in that: include: A support assembly, the support assembly comprising a first bracket and a second bracket, wherein the first bracket and the second bracket are hinged to each other at the middle to form an "X" shape; A connecting plate, the connecting plate comprising a first connecting plate and two second connecting plates, one end of the first connecting plate is rotatably connected to the upper end of the first bracket, one end of the two second connecting plates is rotatably connected to the upper end of the second bracket, and the other end of the first connecting plate is pivotally connected to the other ends of the two second connecting plates; A seat plate, the seat plate is arranged above the connecting plate, one end of the seat plate is pivotally connected to the other end of the first connecting piece, and a clamping member is provided on the bottom surface of the seat plate; Among them, an elastic locking device is provided on the first connecting plate. When the seat plate is placed horizontally on the connecting plate, the clamping member is inserted into the elastic locking device to apply resistance to the rotation of the seat plate, and one side of the clamping member simultaneously abuts against the upper end of the second bracket to fix the support assembly in the expanded state.

2. The improved folding chair according to claim 1, characterized in that: The first bracket and the second bracket each include two opposite support rods and a top rod, and the top rod is connected between the tops of the two opposite support rods to form a "U"-shaped structure; One of the two support rods in the first bracket is hinged with one of the two support rods in the second bracket to form an "X"-shaped structure, and the other of the two support rods in the first bracket is hinged with the other of the two support rods in the second bracket to form an "X"-shaped structure; One end of the first connecting piece is hinged to the top rod in the first bracket, and one end of the second connecting piece is hinged to the top rod in the second bracket.

3. The improved folding chair according to claim 1, characterized in that: The first connecting piece comprises: A first sheet, one end of which extends to the upper end of the first bracket, and one end of which is formed with a notch; A second sheet, the second sheet is disposed in the notch, one end of the second sheet is pivotally connected to the first sheet, and the other end is pivotally connected to the upper end of the first bracket; The third sheet is integrally formed at the other end of the first sheet, the other end of the third sheet is pivotally connected to the bottom surface of the seat plate, and the third sheet is located between the two second connecting sheets.

4. The improved folding chair according to claim 1, characterized in that: The elastic locking device comprises: A shell, the shell is arranged on the bottom surface of the first connecting piece, and a side of the shell facing the second bracket is formed to be open; A sliding block, the sliding block is slidably disposed in the housing; A spring member, the spring member being arranged in the housing between an inner wall and an end surface of the sliding block; Among them, a through slot is provided on the first connecting plate, one end of the sliding block extends to the bottom of the through slot, the bottom surface of the clamping piece is formed as an inclined surface, and an arc-shaped protrusion is formed on the side opposite to the sliding block. When the seat plate is placed horizontally on the connecting plate, the lower end of the clamping piece passes through the through slot and moves to the bottom of the sliding block, and the arc-shaped protrusion abuts against the bottom surface of the sliding block.

5. The improved folding chair according to claim 1, characterized in that: It also includes a chair back, wherein both sides of the upper end of the first bracket are provided with an extension column, the extension column extends vertically, and the lower end of the chair back is connected to the extension column.

6. The improved folding chair according to claim 5, characterized in that: The sides of the two extension columns are each provided with a supporting piece, the back of the chair back is provided with two rotating pieces, and the two rotating pieces and the two supporting pieces are rotatably connected one by one, so that the chair back can pivot along the connection between the rotating pieces and the supporting pieces.

7. The improved folding chair according to claim 5, characterized in that: The lower ends of both sides of the chair back are provided with through holes, and locking columns are provided in the two through holes, and the locking columns can slide along the length direction of the through holes; The upper end surfaces of the two extension columns are provided with locking holes. When the chair back is pivoted to the vertical direction, the lower ends of the locking columns slide into the locking holes due to the action of gravity.

8. The improved folding chair according to claim 2, characterized in that: A first cross bar is provided between the lower halves of the two support bars in the first bracket, a second cross bar is provided between the lower halves of the two support bars in the second bracket, and a third connecting piece is provided between the first cross bar and the second cross bar; The third connecting plate includes a fourth plate, a fifth plate and a limiting plate. One end of the fourth plate is rotatably connected to the first cross bar, one end of the fifth plate is rotatably connected to the second cross bar, the other end of the fourth plate is pivotally connected to the other end of the fifth plate, and the limiting plate is arranged on the fourth plate to limit the upward rotation of the fifth plate.

9. The improved folding chair according to claim 8, characterized in that: The limiting piece is integrally arranged with the fourth piece body, and a portion of the limiting piece extends to the top of the fifth piece body.

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