Multipurpose folding chair

Abstract

To provide a foldable chair itself which can be increased in the overall load-bearing capacity by a structural reinforcement design, and decreased in the volume by a folding method, and is conveniently stored when not in use.SOLUTION: A multi-purpose foldable chair comprises: opposed two supporting side plates; two connecting plates arranged between the two supporting side plates and pivotably connected to the two supporting side plates; a seat cushion plate arranged between the two supporting side plates, where two sides of the seat cushion plate respectively and pivotably connected to the two supporting side plates; and a kneeling cushion plate arranged between the two supporting side plates, where two sides of the kneeling cushion plate respectively and pivotably connected to the two supporting side plates. The components may be bent and folded such that a distance between the two supporting side plates is reduced.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a multi-purpose folding chair, more specifically, to a multi-purpose folding chair with excellent seat cushion structural strength and a reduced volume after folding for easy storage. [Background technology]

[0002] The chair shown in Taiwan Patent Publication No. 517965 includes a seat unit and a seat back unit pivotable relative to the seat unit. The seat unit includes a first body, a second body having a height lower than that of the first body, a pair of first positioning parts respectively protruding outward from both sides of the first body, and a pair of second positioning parts respectively protruding outward from both sides of the second body. The seat back unit includes two support arms each pivotable relative to the seat unit, and the seat back unit is convertible between a sitting state and a kneeling state relative to the seat unit, and in the sitting state, the support arms abut against the first positioning parts and move away from the second positioning parts, and in the kneeling state, the support arms abut against the second positioning parts and move away from the first positioning parts. Summary of the Invention [Problem to be solved by the invention]

[0003] Such chairs are particularly suitable for places of worship, evangelism, etc., because the user can change the seat back unit from a seated position to a kneeling position by himself / herself as the situation requires. However, such chairs are heavy and bulky in actual use, which makes them inconvenient to transport. In addition, such chairs cannot be reduced in volume and therefore require a large storage space, so there is still room for improvement.

[0004] In view of the above, there is a need to provide a folding chair that has better overall load-bearing capacity and is convenient to store when not in use. [Means for solving the problem]

[0005] According to the present invention, a multi-purpose folding chair is provided, which includes two support side plates, two connecting plates, a seat cushion plate, and a kneeling cushion plate, the two support side plates are arranged opposite to each other, the two connecting plates are arranged between the two support side plates and movably pivotally connected to the two support side plates, the seat cushion plate is arranged between the two support side plates, both sides of the seat cushion plate are movably pivotally connected to the two support side plates respectively, the kneeling cushion plate is arranged between the two support side plates, and both sides of the kneeling cushion plate are movably pivotally connected to the two support side plates respectively, and each connecting plate, seat cushion plate, and kneeling cushion plate can be folded and folded so as to shorten the distance between the two support side plates.

[0006] In one embodiment, the two support side plates are each molded with a first pivot part, and the multi-purpose folding chair further includes two handrail plates and a back plate, each of which has a second pivot part and a support part molded at both ends, each of which is pivotally connected to the first pivot parts of the two support side plates by the second pivot parts, and the back plate is molded with a fourth fold line, and the back plate is disposed between the two handrail plates, and both sides of the back plate are movably pivotally connected to the support parts of the two handrail plates, respectively, and the back plate can be folded into a folded state by the fourth fold line to shorten the distance between the two support side plates.

[0007] In one embodiment, the two support side plates each have a first abutment portion and a second abutment portion molded thereon, and a first pivot portion is molded between the first abutment portion and the second abutment portion, and the first abutment portion and the second abutment portion can each limit the pivot angle of the handrail plate.

[0008] In one embodiment, positioning portions are molded on the inner sides of the two handrail plates, and relative positioning portions having arcuate tracks are molded on the two support side plates relative to the relative surfaces of the positioning portions, and the positioning portions can slide relative to the arcuate tracks formed by the relative positioning portions so that the two handrail plates can rotate relative to the two support side plates along the arcuate tracks.

[0009] In one embodiment, the connecting plate includes a first plate body and a second plate body, and the first plate body and the second plate body each have a reinforcing structure molded on the inner side thereof.

[0010] In one embodiment, the kneeling cushion plate includes a first kneeling plate and a second kneeling plate, with a reinforcing structure molded on the inside of the first kneeling plate and the second kneeling plate, respectively.

[0011] In one embodiment, a kneeling cushion reinforcing plate against which one side of the kneeling cushion plate can abut is movably and pivotally mounted between the two support side plates.

[0012] In one embodiment, the reinforcing structure further includes a plurality of hexagonal reinforcing grids arranged in a honeycomb shape, and a plurality of reinforcing ribs each penetrating and connecting between each of the hexagonal reinforcing grids.

[0013] In one embodiment, a reinforcing cover plate covers the inside of at least one of the two handrail plates and the back plate.

[0014] In one embodiment, the position where the two support side plates and the kneeling cushion plate are pivotally connected has an inclination, and after the kneeling cushion plate is pivotally connected to the two support side plates, the plane of the kneeling cushion plate is formed into a slope. Effect of the Invention

[0015] As described above, the folding chair itself has a reinforced structural design to enhance its overall load-bearing capacity, and the folding method can reduce its volume, making it convenient to store when not in use.

[0016] In order to more clearly describe the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the description of the embodiments or the prior art are briefly described below. However, the drawings in the following description are only some embodiments of the present application, and it is obvious to those skilled in the art that they can obtain other drawings from these drawings without creative efforts. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2 is a three-dimensional structural diagram of the multi-purpose folding chair of the present invention. [Diagram 2] FIG. 2 is a three-dimensional structural view of the multi-purpose folding chair shown in FIG. 1 from another angle. [Diagram 3] FIG. 2 is an exploded schematic view of the multipurpose folding chair shown in FIG. [Figure 4] 2 is an exploded schematic view of the multipurpose folding chair shown in FIG. 1 from another angle. [Diagram 5] FIG. 2 is an exploded schematic view of the seat cushion plate of the present invention. [Figure 6] FIG. 2 is an exploded schematic view of the kneeling cushion plate of the present invention. [Figure 7] 3 is a schematic diagram of a first state of a positioning portion and a relative positioning portion of the present invention; FIG. [Figure 8] 4 is a schematic diagram of a second state of the positioning portion and the relative positioning portion of the present invention. FIG. [Figure 9] FIG. 2 is a schematic diagram of a reinforcing structure of the present invention. [Figure 10] FIG. 4 is a schematic diagram of the angle of the kneeling cushion plate. [Figure 11] FIG. 13 is a schematic diagram of the use of a shielding plate. [Figure 12] FIG. 13 is a schematic diagram of stress applied to a conventional kneeling seat. [Figure 13] FIG. 2 is a schematic diagram of a stress acting on a kneeling cushion plate of the present invention. [Figure 14] FIG. 2 is a structural schematic diagram of a contact portion of the present invention. [Figure 15] FIG. 1 is a schematic diagram of the folding process of the multi-purpose folding chair of the present invention. [Figure 16] 2 is a schematic diagram (II) of the folding process of the multi-purpose folding chair of the present invention. [Figure 17] 13(a) and 13(b) show deformation distribution maps after the same force is applied to the backplate of embodiment 1 and the backplate of comparative example 1, respectively. [Figure 18] 13(a) and 13(b) show deformation distribution maps after the same force is applied to the seat cushion plate of the first embodiment and the seat cushion plate of the first comparative example, respectively. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The following description includes specific information related to exemplary embodiments of the present invention. The drawings and detailed description of the present invention are merely exemplary embodiments. However, the present invention is not limited to these exemplary embodiments. Other variations and embodiments of the present invention will occur to those skilled in the art. Unless otherwise stated, similar or corresponding elements in the drawings may be indicated by similar or corresponding symbols. In addition, the drawings and examples in the present invention are generally not to scale and are not intended to correspond to actual relative sizes.

[0019] For consistency and ease of understanding, like features are designated by numerals in the exemplary drawings (although in some instances they are not so designated), but should not be limited narrowly to the features shown in the drawings, as features in different embodiments may differ in other respects.

[0020] Terms such as "at least one embodiment," "one embodiment," "multiple embodiments," "different embodiments," "some embodiments," "the present embodiment," and the like may indicate that the embodiments of the invention so described may include a particular feature, structure, or characteristic, but not all possible embodiments of the invention must include the particular feature, structure, or characteristic. Additionally, repeated use of the phrases "in one embodiment," "in this embodiment," and the like does not necessarily refer to the same embodiment, even if they may be the same. Additionally, phrases such as "embodiment," when used in connection with "the present invention," and the like, do not imply that all embodiments of the invention must include a particular feature, structure, or characteristic, but rather should be understood to include "at least some embodiments of the present invention" that include the particular feature, structure, or characteristic described. The term "coupled" is defined as a connection, whether directly or indirectly connected through intervening parts, and is not necessarily limited to a physical connection. When the term "comprises" is used, it means "including, but not limited to," and expressly expresses an open-ended inclusion or relationship of the described combinations, groups, series, and equivalents.

[0021] Also, for purposes of explanation and not limitation, specific details of functional entities, techniques, protocols, standards, etc. are set forth to provide an understanding of the described technology. In other instances, detailed descriptions of well-known methods, techniques, systems, architectures, etc. are omitted so as not to obscure the description with unnecessary detail.

[0022] In the present specification and the drawings, terms such as "first", "second" and "third" are used to distinguish different items, not to describe a particular order. Also, the term "comprises" and all variations thereof are intended to include a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or modules is not limited to the listed steps or modules, and may optionally include additional steps or modules not listed, or may optionally include other steps or modules inherent to the process, method, product, or apparatus.

[0023] The present invention will now be described in more detail with reference to the drawings and embodiments.

[0024] 1 and 2, the multi-purpose folding chair 10 shown in the figures includes two support side plates (101, 101'), two handrail plates (102, 102'), two connecting plates (103, 103'), a seat cushion plate 104, a back plate 105, and a kneeling cushion plate 106. The two support side plates (101, 101') are arranged opposite to each other, the two handrail plates (102, 102') are respectively pivotally connected to the two support side plates (101, 101'), and the two connecting plates (103, Each of the two connecting plates (103, 103') has a first fold line 1031 formed thereon, the two connecting plates (103, 103') are provided between the two supporting side plates (101, 101') and are movably pivotally attached to the two supporting side plates (101, 101'), and the two connecting plates (103, 103') can be folded into a folded state by the first fold line 1031, and the seat cushion plate 104 has a second fold line 1041 formed thereon, and the seat cushion plate 104 is provided between the two supporting side plates (101, 101'), and the seat cushion plate The seat cushion plate 104 is movably and pivotally attached to the two support side plates (101, 101') at both sides thereof, and the seat cushion plate 104 can be folded into a folded state by a second fold line 1041. The kneeling cushion plate 106 is formed with a third fold line 1061. The kneeling cushion plate 106 is provided between the two support side plates (101, 101'). The kneeling cushion plate 106 is movably and pivotally attached to the two support side plates (101, 101') at both sides thereof, and the back plate 105 is formed with a fourth fold line 1051. The back plate 105 is provided between the two handrail plates (102, 102'), and both sides of the back plate 105 are movably pivotally attached to the two handrail plates (102, 102'), respectively. The back plate 105 can be folded into a folded state by the fourth fold line 1051, and each connecting plate (103, 103') can be folded along each first fold line 1031 to shorten the distance between the two support side plates (101, 101'), and the seat cushion plate 104 can be folded along the second fold line 1041 to be folded.The kneeling cushion plate 106 can be folded along the third fold line 1061, and the back plate 105 can be folded along the fourth fold line 1051.

[0025] 3 to 6, the multi-purpose folding chair 10 includes two support side plates (101, 101'), two handrail plates (102, 102'), two connection plates (103, 103'), a seat cushion plate 104, a back plate 105, and a kneeling cushion plate 106. The support side plate 101 is molded with a first rotating part 1011, and the top of the support side plate 101 is molded with a first mounting part 1015 and a second mounting part 1016. At least one first mounting part pivot element 10151 is molded on the first mounting part 1015, and at least one second mounting part pivot element 10161 is molded on the second mounting part 1016. A gap is formed between the support side plate 101 and the support side plate 101, and at least one or more first pivot elements 1017 and second pivot elements 1018 are molded in sequence from the outside to the inside on the inner surface of the support side plate 101, a reinforcing structure 107 is molded on the inside of the support side plate 101, a second rotating part 1021 and a support part 1022 are molded on both ends of the handrail plate 102, and the reinforcing structure 107 is molded on the inside of the handrail plate 102, and the handrail plate 102 can be rotated and pivoted to the first rotating part 1011 of the support side plate 101 by the second rotating part 1021 so that the handrail plate 102 can rotate relative to the support side plate 101, and at least one back plate relative pivot fixture 1024 is molded on the inside of the handrail plate 102. In one embodiment, the support side plate 101 is molded with a first abutment portion 1012 and a second abutment portion 1013, and a first pivot portion 1011 is molded between the first abutment portion 1012 and the second abutment portion 1013, and the first abutment portion 1012 and the second abutment portion 1013 can each limit the rotation angle of the handrail plate 102 which is movably pivotally attached to the first pivot portion 1011 so that the handrail plate 102 can rotate within a limited angular range between the first abutment portion 1012 and the second abutment portion 1013.In one embodiment, at least one positioning portion 1023 is molded on the inside of each of the handrail plates 102, and the positioning portion 1023 may be, for example, a protruding boss, and the support side plate 101 is molded with a relative positioning portion 1014 relative to the relative surface of the positioning portion 1023, and the relative positioning portion 1014 may be, for example, a raised boss, and at least one or more arc-shaped tracks 1020 are molded on the surface of the boss, and the structure of the support side plate 101 is the same as that of the support side plate 101', and the structure of the handrail plate 102 is the same as that of the handrail plate 102', so they will not be described again. In one embodiment, the insides of the two handrail plates (102, 102') are covered with reinforcing cover plates 1026, which can reinforce the structural strength of the entire two handrail plates (102, 102'). In one embodiment, the first rotating portion 1011 molded on the support side plate 101 may be a pivot shaft, and the second rotating portion 1021 of the handrail plate 102 may be a pivot hole. In one embodiment, the handrail plate 102 may be pivotally attached to the first pivot part 1011 of the supporting plate 101 by the second pivot part 1021 so that the handrail plate 102 can be rotated relative to the supporting plate 101 .

[0026] In one embodiment, the two connecting plates (103, 103') each have at least one connecting plate pivot attachment (1032, 1032') molded on both sides thereof, the two connecting plates (103, 103') can be pivotally mounted relative to the first pivot element (1017, 1017') and the second pivot element (1018, 1018') of the two supporting side plates (101, 101') by the connecting plate pivot attachments (1032, 1032') on both sides thereof, and one of the two connecting plates (103, 103') has at least one kneeling cushion plate abutment 1039 molded thereon. In one embodiment, the two connecting plates (103, 103') each include a first plate body 1033 and a second plate body 1034, in which at least one plate body pivot attachment 1035 is molded on one side of the first plate body 1033, and a plate body relative pivot attachment 1036 is molded on one side of the second plate body 1034 opposite to the plate body pivot attachment 1035, and the first plate body 1033 is movably connected to the plate body relative pivot attachment 1036 of the second plate body 1034 by the plate body pivot attachment 1035 so that the first plate body 1033 can be folded relative to the second plate body 1034. The first plate body 1033 and the second plate body 1034 are pivotally connected to one side of the first pivot element (1017, 1017') and the second pivot element (1018, 1018'), respectively, with connecting plate pivot fixtures (1032, 1032') molded thereon, and the first plate body 1033 and the second plate body 1034 can be movably pivoted to the first pivot element (1017, 1017') and the second pivot element (1018, 1018') by the connecting plate pivot fixtures (1032, 1032'), and a reinforcing structure 107 is molded on the inner surface of the first plate body 1033 and the second plate body 1034, respectively.

[0027] In one embodiment, a reinforcing structure 107 is molded on the inner side of the seat cushion plate 104, and at least one seat cushion plate pivot attachment 1042 is molded on each side of the two first mounting portions (1015, 1015'), and the seat cushion plate 104 is movably pivoted to the first mounting portion pivot elements (10151, 10151') of the two first mounting portions (1015, 1015') by the seat cushion plate pivot attachments 1042 on both sides, respectively, so that the seat cushion plate 104 is connected and installed between the two first mounting portions (1015, 1015'). In one embodiment, the seat cushion plate 104 includes a first mounting plate 1043 and a second mounting plate 1044, a reinforcing structure 107 is molded on the inside of the first mounting plate 1043 and the second mounting plate 1044, at least one mounting plate pivot 1045 is molded on one side of the first mounting plate 1043, at least one mounting plate counter pivot 1046 is molded on one side of the second mounting plate 1044 facing the mounting plate pivot 1045, and the first mounting plate 1043 is folded relative to the second mounting plate 1044. In order to obtain the above, the first mounting plate 1043 can be movably pivoted to the mounting plate relative pivot 1046 by the mounting plate pivot 1045, the seat cushion plate pivot 1042 is molded on one side of the first mounting plate 1043 and the second mounting plate 1044 facing the two first mounting portions (1015, 1015'), and the first mounting plate 1043 and the second mounting plate 1044 can be movably pivoted to the first mounting portion pivot element 10151 of the two first mounting portions (1015, 1015') by the seat cushion plate pivot 1042. In addition, in one embodiment, the first mounting plate 1043 and the second mounting plate 1044 each have a handle hole 1047 molded therein.

[0028] In one embodiment, a reinforcing structure 107 is molded on the inside of the backplate 105, and the backplate 105 has at least one backplate pivot attachment 1052 molded on each side of the two handrail plates (102, 102'), and each side of the backplate 105 is movably pivoted to two backplate relative pivot attachments (1024, 1024') of the two handrail plates (102, 102') by the backplate pivot attachments 1052 so that the backplate 105 is connected and installed between the two handrail plates (102, 102'). In one embodiment, the backplate 105 includes a first support plate 1053 and a second support plate 1054, the first support plate 1053 and the second support plate 1054 each have a reinforcing structure 107 molded on their insides, at least one support plate pivot 1055 molded on one side of the first support plate 1053, and at least one support plate relative pivot 1056 molded on one side of the second support plate 1054 facing the support plate pivot 1055, and the first support plate 1053 is supported by the support plate pivot 1055 such that the first support plate 1053 can be folded relative to the second support plate 1054. The first support plate 1053 and the second support plate 1054 can be movably pivoted to the two backplate relative pivot parts (1024, 1024') of the two handrail plates (102, 102') by the backplate pivot parts 1052, respectively, and the backplate pivot parts 1052 are molded on one side of the first support plate 1053 and the second support plate 1054 facing the two handrail plates (102, 102'), respectively, so that the other side of the first support plate 1053 and the second support plate 1054 can be movably pivoted to the two backplate relative pivot parts (1024, 1024') of the two handrail plates (102, 102') by the backplate pivot parts 1052. In one embodiment, a reinforcing cover plate 1057 is covered on the inside of the backplate 105 to increase the overall structural strength of the backplate 105.

[0029] In one embodiment, a reinforcing structure 107 is molded on the inner side of the kneeling cushion plate 106, and at least one kneeling cushion plate pivot attachment 1062 is molded on both sides of the two second mounting portions (1016, 1016'), respectively, and both sides of the kneeling cushion plate 106 are movably pivoted to the two second mounting portion pivot elements (10161, 10161') of the two second mounting portions (1016, 1016') by the kneeling cushion plate pivot attachments 1062, respectively, so that the kneeling cushion plate 106 is connected and installed between the two second mounting portions (1016, 1016') of the two support side plates (101, 101'), and one side of the kneeling cushion plate 106 facing the connecting plate 103' can be abutted against the kneeling cushion plate abutment 1039. In one embodiment, the kneeling cushion plate 106 includes a first kneeling plate 1063 and a second kneeling plate 1064, with at least one kneeling plate pivot 1065 molded on one side of the first kneeling plate 1063 and at least one kneeling plate relative pivot 1066 molded on one side of the second kneeling plate 1064 facing the kneeling plate pivot 1065, and the first kneeling plate 1063 is movably pivoted to the kneeling plate relative pivot 1066 by the kneeling plate pivot 1065 such that the first kneeling plate 1063 can be folded relative to the second kneeling plate 1064. The kneeling cushion plate pivot attachment 1062 is molded on one side of the first kneeling plate 1063 and the second kneeling plate 1064 facing the two second mounting portions (1016, 1016'), respectively, and the first kneeling plate 1063 and the second kneeling plate 1064 can each be movably pivoted to the two second mounting portion pivot elements (10161, 10161') of the two second mounting portions (1016, 1016') by the kneeling cushion plate pivot attachment 1062 such that the other sides of the first kneeling plate 1063 and the second kneeling plate 1064 are each movably pivoted to the two second mounting portion pivot elements (10161, 10161').In one embodiment, in order to further increase the supporting force supporting the kneeling cushion plate 106, a kneeling cushion reinforcing plate 109 against which one side of the kneeling cushion plate 106 abuts is movably pivotally attached between the two supporting side plates (101, 101'), and the kneeling cushion reinforcing plate 109 may further be molded with a fifth fold line 1091, and the kneeling cushion reinforcing plate 109 may be folded by being bent along the fifth fold line 1091. The manner in which the above-mentioned parts are combined is shown in Figs. 1 and 2.

[0030] 7 and 8, and further referring to FIGS. 3 and 4, the positioning portion 1023 may be a protruding boss, and the relative positioning portion 1014 is molded with a plurality of arc-shaped tracks 1020, and in one embodiment, the number of the plurality of arc-shaped tracks 1020 is three, and each of these arc-shaped tracks 1020 has a recessed shape, the number of the positioning portions 1023 is multiple, and the positions of the positioning portions 1023 and the arc-shaped tracks 1020 are relative to each other. Therefore, after these positioning portions 1023 are placed on these arcuate tracks 1020, these positioning portions 1023 can slide relative to these arcuate tracks 1020 of the relative positioning portions 1014, and the handrail plate 102 can be propelled by applying force and rotate counterclockwise or clockwise relative to the support side plate 101 along these arcuate tracks 1020, and the manner in which the two handrail plates (102, 102') rotate relative to the two support side plates (101, 101') is as shown in the changes in Figures 7 and 8. In one embodiment, each of these arc-shaped tracks 1020 is molded with at least one positioning hole 1019, and when the positioning portion 1023 rotates relative to these arc-shaped tracks 1020, the bosses of the positioning portion 1023 are fitted into the positioning holes 1019 after rotating, thereby providing a positioning effect, and when the two handrail plates (102, 102') rotate relative to the two support side plates (101, 101'), a rotation step effect can be further provided. Note that, in one embodiment, the boss of the positioning portion 1023 is formed in a spherical shape so that the positioning portion 1023 can be easily removed from the positioning hole 1019.

[0031] Referring to FIG. 9 , in one embodiment, the reinforcing structure 107 further includes a plurality of hexagonal reinforcing grids 1071 and a plurality of reinforcing ribs 1072, the plurality of hexagonal reinforcing grids 1071 are arranged in a honeycomb shape, the plurality of reinforcing ribs 1072 are respectively connected to the partially connected hexagonal reinforcing grids 1071 by penetrating, each reinforcing rib 1072 may be connected to each hexagonal reinforcing grid 1071 by penetrating in various directions such as vertically, horizontally or diagonally, and a through hole 1073 is molded in a part of each hexagonal reinforcing grid 1071, and this drawing is for illustrative purposes only and does not limit the connection form of each reinforcing rib 1072.

[0032] Referring to FIG. 10, in one embodiment, the two second rests (1016, 1016') each have an inclination θ with respect to the plane Z, the preferred angle of the inclination θ is 8 degrees, the inclination θ of the two second rests (1016, 1016') is consistent, and after the kneeling cushion plate 106 is movably pivotally attached to the two rests (1016, 1016'), the plane of the kneeling cushion plate 106 forms a slope that is consistent with the inclination of the two second rests (1016, 1016'), so that when the user kneels, the kneeling cushion plate 106 with the slope formed can make the user's knees feel more comfortable.

[0033] Referring to FIG. 11, in one embodiment, the connection plate 103 further includes a shielding plate 1037, which is movably pivotally connected to the first plate body 1033 and the second plate body 1034, so that the shielding plate 1037 can be lifted relative to the first plate body 1033 and the second plate body 1034. As can be seen from this drawing, when the shielding plate 1037 is lifted, an opening 1038 is formed in the connection plate 103, and the opening 1038 is connected to the storage space 108 formed by the bottom of the seat cushion plate 104, so that the user can lift the shielding plate 1037 and put personal items, such as shoes, into the storage space 108, and then return the shielding plate 1037, thereby protecting the privacy of personal items.

[0034] Further referring to Figures 12 and 13, Figure 12 shows the "chair" disclosed in Taiwan Patent No. 517965, and as can be seen from Figure 12, the side of this seat is double-stepped, that is, a low seat section 111 that is relatively low and has a 180-degree flat surface is connected to the rear of the seat 11, and the seat surface of the low seat section 111 has a soft rectangular seat cushion 112, and Figure 13 shows an embodiment in which the kneeling cushion plate 106 of the present invention is inclined at 8 degrees, and the stresses in both the low seat section 111 and the kneeling cushion plate 106 are analyzed as follows.

number

[0035] Assuming that the contact area of ​​the corner 113 of the low seat part 111 is 100mm x 1mm, when the human body kneels from the knee to the lower leg (as indicated by reference numeral 12 in the figure), the stress is concentrated at the corner 113 of the kneeling plate, resulting in too large a local stress. The stress at the corner 113 of the low seat part is calculated as follows:

number

[0036] Assuming that the contact area of ​​the kneeling cushion plate 106 is 100 mm x 223.5 mm, when the human body kneels from the knee to the lower leg (as indicated by reference numeral 12 in the figure), since the kneeling cushion plate 106 is an inclined surface, the stress is evenly distributed on the kneeling cushion plate 106. The stress on the kneeling cushion plate 106 is calculated as follows:

number

[0037] From the above, when the part of the human body from the knee to the lower leg (as shown by reference numeral 12 in the figure) kneels on the 180-degree flat low seat 111, the part from the knee to the lower leg receives a reverse stress of about 9.52 MPa, and conversely, when the part of the human body from the knee to the lower leg kneels on the kneeling cushion plate 106 inclined at 8 degrees, the part from the knee to the lower leg receives a reverse stress of about 0.0426 MPa. By designing the kneeling cushion plate 106 to be inclined at 8 degrees, the cross-sectional area of ​​the inclined surface of the kneeling cushion plate 106 that receives the acting force is increased, and the reverse stress that the part of the human body from the knee to the lower leg receives when kneeling can be greatly improved. This is because the stress is inversely proportional to the cross-sectional area that receives the acting force and is proportional to the force of the vertical acting surface, that is, the larger the cross-sectional area that receives the acting force, the smaller the stress value. Therefore, it can be seen that the 8-degree angle at which the kneeling cushion plate 106 is inclined can greatly improve the comfort of kneeling.

[0038] Referring to FIG. 14, in one embodiment, the two support portions (1022, 1022') of the two handrail plates (102, 102') are molded with at least one abutment portion 1025 extending from the two backplate relative pivot portions (1024, 1024'), respectively, and when both sides of the backplate 105 are movably pivoted to the two backplate relative pivot portions (1024, 1024'), respectively, the one side of the backplate 105 that is movably pivoted to the two support portions (1022, 1022') abuts against the abutment portion 1025, thereby increasing the supporting force of the backplate 105.

[0039] 15 and 16, and also 1 to 4, a coordinate system having three-dimensional directions is defined for the sake of explanation. The three-dimensional directions are the X direction, the Y direction, and the Z direction, and two of the three directions are perpendicular to each other, the X direction and the Y direction respectively represent the vertical direction and the horizontal direction on a plane of the same height, and the Z direction is defined as the height direction. As shown in FIG. 15, the two support side plates (101, 101') are relatively provided at an interval in the X direction, and the pivotal connection portion of the first plate body 1033 and the second plate body 1034 of the two connecting plates (103, 103') is further defined as a first fold line 1031, and the first fold line 1031 extends approximately along the Z direction. As a result, the first plate body 1033 and the second plate body 1034 pivot relatively about the first fold line 1031, and the first plate body 1033 and the second plate body 1034 are folded, whereby the connecting plate (103, 103') can be transformed from a flat plate shape into a two-fold shape. The seat cushion plate 104 is configured by being pivotally attached by a first mounting plate 1043 and a second mounting plate 1044, and a second fold line 1041 is defined at the pivotal attachment portion of the first mounting plate 1043 and the second mounting plate 1044, extending approximately along the Y direction. As a result, the first mounting plate 1043 and the second mounting plate 1044 can pivot relatively about the second fold line 1041, and the seat cushion plate 104 is folded, whereby the seat cushion plate 104 can be transformed from a flat plate shape into a folded shape in two, and the back plate 105 is pivotally attached by the first support plate 1053 and the second support plate 1054, and a fourth fold line 1051 extending approximately along the Z direction is defined at the pivotal attachment portion of the first support plate 1053 and the second support plate 1054. As a result, the first support plate 1053 and the second support plate 1054 can pivot relatively about the fourth fold line 1051, and the back plate 105 is folded, whereby the back plate 105 can be transformed from a flat plate shape into a folded shape in two.The kneeling cushion plate 106 is configured to be pivotally connected by a first kneeling plate 1063 and a second kneeling plate 1064, and a third fold line 1061 extending approximately along the Y direction is defined at the pivotal connection portion of the first kneeling plate 1063 and the second kneeling plate 1064. This allows the first kneeling plate 1063 and the second kneeling plate 1064 to pivot relatively about the third fold line 1061 as an axis, and the kneeling cushion plate 106 is folded and folded, whereby the kneeling cushion plate 106 can be transformed from a flat plate shape into a folded shape.

[0040] Furthermore, when folding the multipurpose folding chair 10 of the present invention, it is necessary to apply a small amount of force to fold each part, and the folding method is as follows: Apply force to each of the two connecting plates (103, 103') along the first fold line 1031 (as shown by arrow A in the figure) to fold the first plate body 1033 and the second plate body 1034, apply force to the seat cushion plate 104 along the second fold line 1041 (as shown by arrow B in the figure) to fold the first mounting plate 1043 and the second mounting plate 1044, apply force to the back plate 105 along the fourth fold line 1051 (as shown by arrow C in the figure) to fold the first support plate 1053 and the second support plate 1054, and apply force to the kneeling cushion plate 106 along the third fold line 1061 (as shown by arrow D in the figure) to fold the first kneeling plate 1063 and the second kneeling plate 1064. 14, the distance between the two support side plates (101, 101') and the two handrail plates (102, 102') is shortened, and finally the present invention is transformed from the chair form into the folded form shown in FIG. 16, thereby greatly reducing the volume occupied, and thus more folded present inventions can be stored in a limited storage space. The force applied as described above refers to the force applied mainly toward the pivotal parts or fold lines (1031, 1041, 1051, 1061) of each part so that each part can be bent and folded more easily. Further referring to FIG. 16, the first mounting plate 1043 and the second mounting plate 1044 of the seat cushion plate 104 are each molded with a handle hole 1047, so that when the first mounting plate 1043 and the second mounting plate 1044 of the seat cushion plate 104 are folded, the two handle holes 1047 come close to each other, thereby allowing the user to lift and move the folded multi-purpose folding chair 10 with their hands easily.

[0041] Below are the verification results after reinforcing the back plate and seat cushion plate. Next, an experiment was conducted using embodiment 1 and comparative example 1, and a pressure resistance experiment was conducted on the backplates of embodiment 1 of the present invention and comparative example 1. A weight of 53 kgf was applied to the backplate of embodiment 1 (i.e., backplate 105 of the present invention will be referred to as backplate 200 hereinafter) and the backplate of comparative example 1, respectively, and the results were analyzed using a computer-aided engineering (CAE) simulation calculation method. The results are shown in Figure 17 (a) (i.e., comparative example 1) and (b) (i.e., embodiment 1).

[0042] The difference between the backplate 300 of Comparative Example 1 and the backplate 200 of Embodiment 1 is that the backplate 300 of Comparative Example 1 does not include the reinforcing structure and reinforcing cover plate of the present invention, and the handrail plate does not include the reinforcing cover plate and abutment portion of the present invention.

[0043] Table 1 shows the maximum deformation values ​​obtained in the first embodiment and the first comparative example. [Table 1]

[0044] As can be seen from Table 1, the maximum deformation value of the backplate 300 in Comparative Example 1 is three times the maximum deformation value of the backplate 200 in Embodiment 1. This shows that the maximum deformation value of the backplate 200 in Embodiment 1 is lower than that in Comparative Example 1, and pressure resistance is effectively improved.

[0045] A pressure resistance experiment was conducted on the seat cushion plates of embodiment 1 of the present invention and comparative example 1. A weight of 97 kgf was applied to the seat cushion plate of embodiment 1 (i.e., the seat cushion plate 104 of the present invention will be referred to as seat cushion plate 400 hereinafter) and the seat cushion plate 500 of comparative example 1, respectively, and the results of analysis using a CAE simulation calculation method are shown in Figure 18 (a) (i.e., comparative example 1) and (b) (i.e., embodiment 1).

[0046] The difference between the seat cushion plate 500 of Comparative Example 1 and the seat cushion plate 400 of the first embodiment is that the seat cushion plate 500 does not include the multiple reinforcing ribs included in the reinforcing structure of the present invention.

[0047] Table 2 shows the maximum deformation values ​​obtained in the first embodiment and the first comparative example. [Table 2]

[0048] As can be seen from Table 2, the maximum deformation value of the seat cushion plate 500 in Comparative Example 1 is 1.18 times the maximum deformation value of the seat cushion plate 400 in Embodiment 1. Therefore, in Embodiment 1, the maximum deformation value of the seat cushion plate 400 is reduced compared to Comparative Example 1, and it is found that the pressure resistance is effectively improved.

[0049] From the above description, it is clear that the concepts described herein may be implemented using various techniques without departing from the scope of these concepts. Moreover, although the concepts have been described with particular reference to certain embodiments, those skilled in the art will recognize that changes in form and detail may be made without departing from the scope of these concepts. Thus, the described embodiments are to be understood in all respects as illustrative and not restrictive. Moreover, it is to be understood that the present application is not limited to the specific embodiments described above, but that many rearrangements, modifications and substitutions are possible without departing from the scope of the invention. [Explanation of symbols]

[0050] 10: Multipurpose folding chair 101: Support plate 101': Support plate 1011: First rotating part 1012: First contact portion 1013: Second contact part 1014: Relative positioning section 1015: First placement part 1015': first placement part 10151: First mounting pivot element 10151': first mounting part pivot element 1016: Second placement section 1016': second placement section 10161: Second mounting pivot element 10161': second mounting pivot element 1017: First pivot element 1017': first pivot element 1018: second pivot element 1018': second pivot element 1019: Positioning hole 1020: Circular orbit 102: Handrail plate 102': Handrail plate 1021: Second rotating part 1022: Support part 1023: Positioning section 1024: Back plate relative pivot attachment 1024': Back plate relative pivot attachment 1025: Contact part 1026: Reinforcement cover plate 103: Connection plate 103': Connection plate 1031: First fold line 1032: Connection plate pivot fixture 1032': Connection plate pivot fixture 1033: First plate body 1034: Second plate body 1035: Plate pivot attachment 1036: Plate body relative pivot attachment 1037: Shielding plate 1038:Aperture 1039: Kneeling cushion plate contact 104: Seat cushion plate 1041: Second fold line 1042: Seat cushion plate pivot attachment 1043: First mounting plate 1044: second mounting plate 1045: Mounting plate pivot attachment 1046: Mounting plate relative pivot attachment 1047:Handle hole 105: Back plate 1051: 4th fold line 1052: Back plate pivot attachment 1053: First support plate 1054: Second support plate 1055: Support plate pivot attachment 1056: Support plate relative pivot attachment 1057: Reinforcement cover plate 106: Kneeling cushion plate 1061: Third fold line 1062: Kneeling cushion plate pivot attachment 1063: First Kneeling Plate 1064: Second Kneeling Plate 1065: Kneeling plate pivot attachment 1066: Kneeling plate relative pivot attachment 107: Reinforcement structure 1071:Hexagonal reinforcement grid 1072: Reinforcement rib 1073:Through hole 108:Storage space 109: Kneeling cushion reinforcement plate 1091: 5th fold line 11: Sheet 111: Low seat 112: Soft rectangular seat cushion 113: Corner 12: From the knee to the lower leg

Claims

1. Two support side plates provided opposite to each other; Two connection plates each having a first fold line formed thereon, the connection plates being provided between the two support side plates, and movably pivotally attached to the two support side plates, and each of the connection plates being capable of being folded into a folded state by the first fold line; A seat cushion plate having a second fold line formed thereon and provided between the two support side plates, both sides of which are pivotally attached to the two support side plates, and which can be folded into a folded state along the second fold line; A kneeling cushion plate having a third folding line formed thereon and disposed between the two support side plates, and both sides of the kneeling cushion plate are movably and pivotally attached to the two support side plates, respectively. A reinforcing structure is molded on the inside of at least one of the two support side plates, the two connection plates, the seat cushion plate, and the kneeling cushion plate, and the reinforcing structure includes a plurality of hexagonal reinforcing lattices arranged in a honeycomb shape, and a plurality of reinforcing ribs each penetrating and connected between each of the hexagonal reinforcing lattices; The two support side plates each have a first pivot portion formed thereon, Two handrail plates each having a second pivot part and a support part molded at both ends, each of which is pivotally attached to the first pivot part of the two support side plates by the second pivot part; and a back plate having a fourth fold line molded therein and provided between the two handrail plates, both sides of which are movably pivoted to the support parts of the two handrail plates, respectively, and which can be folded into a folded state by the fourth fold line so as to shorten the distance between the two support side plates. A positioning portion is molded on the inside of each of the two handrail plates, and a relative positioning portion having an arc-shaped track is molded on each of the two support side plates relative to the relative surface of the positioning portion, and the positioning portion can slide on the arc-shaped track formed by the relative positioning portion so that the two handrail plates can rotate relative to the two support side plates along the arc-shaped track; In order to reduce the distance between the two support side plates, each of the connection plates can be folded along the first fold line, the seat cushion plate can be folded along the second fold line, and the kneeling cushion plate can be folded along the third fold line. Multipurpose folding chair.

2. The two support side plates are each molded with a first abutment portion and a second abutment portion, and the first rotation portion is molded between the first abutment portion and the second abutment portion, and the first abutment portion and the second abutment portion can each limit the rotation angle of the handrail plate.

2. The multi-purpose folding chair according to claim 1.

3. The connection plate includes a first plate body and a second plate body, and the reinforcing structure is molded on the inside of the first plate body and the second plate body, respectively.

2. The multi-purpose folding chair according to claim 1.

4. The kneeling cushion plate includes a first kneeling plate and a second kneeling plate, and the reinforcing structure is molded on the inner side of the first kneeling plate and the second kneeling plate, respectively.

2. The multi-purpose folding chair according to claim 1.

5. A kneeling cushion reinforcing plate, which is in contact with one side of the kneeling cushion plate, is movably and pivotally mounted between the two support side plates.

2. The multi-purpose folding chair according to claim 1.

6. A reinforcing cover plate is provided on the inside of at least one of the two handrail plates and the back plate.

2. The multi-purpose folding chair according to claim 1.

7. The position where the two support side plates and the kneeling cushion plate are pivotally attached has an inclination, the inclination being 8 degrees, and after the kneeling cushion plate is pivotally attached to the two support side plates, the plane of the kneeling cushion plate is formed as an inclined surface.

2. The multi-purpose folding chair according to claim 1.

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