Folding chair

Abstract

The utility model provides a folding chair. The folding chair comprises a chair plate and a chair back, the chair plate comprises a first side rod extending towards the chair back; the chair back is provided with a connecting piece, the connecting piece comprises a first side plate and a second side plate which are oppositely arranged, and one end, facing the chair back, of the first side rod is positioned between the first side plate and the second side plate and is rotationally connected with the connecting piece, so that the folding chair can be folded. The connecting piece further comprises a limiting block, one side of the limiting block is connected with the first side plate, the other side of the limiting block is connected with the second side plate, the limiting block is located on the rotating path of the chair back, and the limiting block is configured to make contact with the lower side of the first side rod in the folding chair opening process and make contact with the lower side of the second side rod in the folding chair opening process. The chair back is limited to rotate in the direction far away from the upper surface of the chair plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of office supplies, in particular to a folding chair. BACKGROUND

[0002] In the existing folding chair, the chair back and the leg are integrated, and the chair plate and the chair back are hingedly connected. After folding, the whole folding chair becomes a plate-like structure with a small thickness. In the existing office chair, the leg and the bottom plate are fixedly connected. Therefore, the structure of the existing folding chair is not suitable for office chairs. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present application is to provide a folding chair that can be applied to office chairs.

[0004] The embodiments of the present application are implemented as follows:

[0005] In a first aspect, the embodiments of the present application provide a folding chair, comprising a chair plate and a chair back; the chair plate comprises a first side rod extending towards the chair back; the chair back is provided with a connecting piece, the connecting piece comprises a first side plate and a second side plate arranged oppositely, and one end of the first side rod towards the chair back is located between the first side plate and the second side plate and is rotationally connected with the connecting piece, so that the folding chair can be folded.

[0006] The connecting piece further comprises a limiting block, one side of the limiting block is connected with the first side plate, and the other side is connected with the second side plate. The limiting block is located on the rotation path of the chair back, and is configured to contact the lower side of the first side rod during the opening of the folding chair, so as to limit the rotation of the chair back away from the upper surface of the chair plate.

[0007] In the above technical solution, the chair plate and the leg are fixedly connected, so that the folding chair adopting the above technical solution can be applied to office chairs. Since the chair plate and the chair back are rotationally connected, the folding can be realized by rotating the chair back towards the upper surface of the chair plate. In the folded state, the folding chair can be unfolded by rotating the folded chair back away from the upper surface of the chair plate. The connecting piece provided by the above technical solution can make the chair back stop rotating when the limiting block contacts the lower side of the first side rod.

[0008] In some optional embodiments, the first side rod and the connecting piece are rotationally connected through a rotating shaft, and the rotating shaft is located between the upper surface and the lower surface of the first side rod.

[0009] In the above technical solution, the rotating shaft is located between the upper surface and the lower surface of the first side rod, which can limit the rotation of the chair back away from the upper surface of the chair plate when the limiting block contacts the lower side of the first side rod.

[0010] In some alternative embodiments, the first side rod comprises a rod-shaped structural member extending towards the chair back, and a shell-shaped structural member; the rod-shaped structural member is hollow and has an opening at one end thereof facing the chair back, and the shell-shaped structural member is arranged at the end of the rod-shaped structural member and covers the opening; the shell-shaped structural member is located between the first side plate and the second side plate; and the rotating shaft passes through the rod-shaped structural member.

[0011] In the above technical solution, the first side rod is made of a hollow rod-shaped structural member, so that the first side rod has a lighter mass. The shell-shaped structural member is arranged at the end of the first side rod to cover the opening, so that the rotation of the rotating shaft is not affected by foreign matter entering the opening.

[0012] In some alternative embodiments, the shell-shaped structural member is a plastic structural member.

[0013] In some alternative embodiments, the rotating shaft passes through the rod-shaped structural member and the shell-shaped structural member.

[0014] In the above technical solution, the rotating shaft passes through the rod-shaped structural member and the shell-shaped structural member, so that the shell-shaped structural member cannot fall off the end of the rod-shaped structural member during normal use.

[0015] In some alternative embodiments, the side of the chair plate away from the chair back further comprises a cross beam connected to one end of the first side rod away from the chair back; and the cross beam is welded to the first side rod.

[0016] In the above technical solution, the cross beam is welded to the first side rod, so that the connection between the cross beam and the first side rod is reliable to withstand a large weight.

[0017] In some alternative embodiments, a first reinforcing member is further connected between the cross beam and the first side rod, one end of the first reinforcing member being welded to the cross beam and the other end being welded to the first side rod.

[0018] In the above technical solution, the first reinforcing member is welded between the cross beam and the first side rod, so that the connection between the cross beam and the first side rod is more secure.

[0019] In some alternative embodiments, the first reinforcing member is located at the lower side of the cross beam and the first side rod.

[0020] In the above technical solution, the first reinforcing member is welded at the lower side of the cross beam and the first side rod, so that the influence of the first reinforcing member on the user is reduced.

[0021] In some alternative embodiments, the first side rod is perpendicular to the cross beam, and a second reinforcing member is also connected to the position where the first side rod forms an angle with the cross beam, the second reinforcing member is L-shaped, one end of the second reinforcing member is welded to the first side rod, and the other end is welded to the cross beam.

[0022] In the above technical solution, the second reinforcing member in L shape is welded to the position where the first side rod forms an angle with the cross beam, which can make the connection between the cross beam and the first side rod more firm, and will not affect the user.

[0023] In some alternative embodiments, the seat plate further comprises a second side rod, the second side rod is connected to the same side of the cross beam in parallel with the first side rod, and the backrest is further provided with the connecting member connected to the second side rod.

[0024] In the above technical solution, the first side rod and the second side rod are both rotationally connected to the backrest, which can make the backrest more stable and the stress more uniform during rotation. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 The schematic diagram of the folding chair provided by the embodiments of the present application in the unfolded state and the folded state (wherein the dashed line is the position schematic diagram of the backrest in the folded state);

[0027] Figure 2 The schematic diagram of the folding chair provided by the embodiments of the present application in the unfolded state;

[0028] Figure 3 The Figure 2 The enlarged view of A in FIG. 6;

[0029] Figure 4 The exploded view of the connection position between the seat plate and the backrest in the embodiments of the present application;

[0030] Figure 5 The schematic diagram of the connection position between the seat plate and the backrest in the unfolded state of the folding chair in the embodiments of the present application;

[0031] Figure 6 The schematic diagram of the seat plate in the embodiments of the present application.

[0032] Icon: 100 - chair plate; 110 - first side rod; 111 - rod-shaped structural member; 112 - shell-shaped structural member; 120 - second side rod; 130 - cross beam; 140 - strip-shaped structure; 151 - first reinforcing member; 152 - second reinforcing member; 200 - chair back; 210 - connecting member; 211 - first side plate; 212 - second side plate; 213 - mounting plate; 214 - limiting block; 300 - rotating shaft; 400 - leg. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0035] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0038] In the description of the application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] The application provides a folding chair, such as Figure 1 With Figure 2 As shown, it comprises a chair back 200, a chair board 100 and a leg 400, the chair board 100 is rotationally connected with the chair back 200, and the chair board 100 is fixedly connected with the leg 400. The leg 400 is in contact with the ground and plays a supporting role. The chair board 100 is a structural member directly contacted by the user's hips, and the chair back 200 is a structural member directly contacted by the user's back. The folding and unfolding are realized by the relative rotation of the chair board 100 and the chair back 200. The folding process comprises rotating the chair back 200 towards the direction of the upper surface of the chair board 100; and the unfolding process comprises rotating the chair back 200 away from the upper surface of the chair back 200. Figure 1 It is shown that the folding chair is in a folded state, and the chair back 200 is in the position shown by the dashed line; and the folding chair is in an unfolded state, and the chair back 200 is in the position shown by the solid line.

[0040] As shown in Figures 3 to 5 The chair board 100 comprises a first side rod 110 extending towards the chair back 200, the chair back 200 is provided with a connecting piece 210, the connecting piece 210 comprises oppositely arranged first and second side plates 211 and 212, and the end of the first side rod 110 towards the chair back 200 is located between the first side rod 110 and the second side plate 212 and is rotationally connected with the connecting piece 210, so that the folding chair is foldable. It is not difficult to know that the first side plate 211 can be rotationally connected with at least one of the first side plate 211 and the second side plate 212 to realize the foldability of the folding chair. Accordingly, as shown in Figure 3 And Figure 4 The first side plate 211 and the second side plate 212 both extend vertically, and the space for the end of the first side rod 110 to rotate relative to the chair back 200 or the connecting piece 210 is formed between the first side plate 211 and the second side plate 212.

[0041] The connecting piece 210 further comprises a limiting block 214, one side of the limiting block 214 is connected with the first side plate 211 and the other side is connected with the second side plate 212, and the limiting block 214 is located on the rotation path of the chair back 200, that is, the limiting block 214 is located in the space for the end of the first side rod 110 to rotate relative to the chair back 200 or the connecting piece 210. And, as shown in Figure 3As shown, the limiting block 214 is configured to contact the lower side of the first side rod 110 during the unfolding of the folding chair to limit the rotation of the chair back 200 away from the upper surface of the chair plate 100. The limiting block 214 in the present application is to stop the rotation of the folding chair to a certain position during unfolding, and the chair back 200 can be kept stationary at this position to facilitate the use of the folding chair.

[0042] In the above technical solution, the chair plate 100 and the chair back 200 can rotate relative to each other, so that the folding chair can be folded. Since the limiting block 214 is arranged on the path of the rotation of the first side rod 110 relative to the chair back 200 or the connecting piece 210, the rotation of the chair back 200 is stopped after the chair back 200 is rotated to a certain angle relative to the chair plate 100, thereby facilitating the use of the folding chair.

[0043] In the above technical solution, the distance between the rotation axis and the limiting block 214 in the vertical direction determines the angle of unfolding of the chair back 200. The greater the distance between the two, the greater the angle of unfolding of the chair back 200 relative to the chair plate 100. In some embodiments, the limiting block 214 is connected to the lower side of the first side plate 211 and the second side plate 212. In this embodiment, the vertical dimension of the first side plate 211 and the second side plate 212 can be as small as possible to reduce the occupied space. In other embodiments, the limiting block 214 can be connected to the middle position of the first side plate 211 and the second side plate 212 in the vertical direction.

[0044] In some embodiments, the limiting block 214 can be only connected to part of the edge of the lower side of the first side plate 211 and the second side plate 212, i.e., as shown in Figure 4 As shown, the space formed between the first side plate 211 and the second side plate 212 has an open lower end, and the edge of the open lower end is surrounded by the edge of the limiting block 214 facing the chair back 200. In other embodiments, the limiting block 214 can be a complete edge connected to the lower side of the first side plate 211 and the second side plate 212, i.e., the limiting block 214 completely encloses the lower end of the space formed between the first side plate 211 and the second side plate 212.

[0045] In some embodiments, the end of the first side plate 211 and the second side plate 212 is directly connected to the chair back 200. In other embodiments, as shown in Figure 4 As shown, the connecting piece 210 further includes a mounting plate 213, and the first side plate 211 and the second side plate 212 are respectively connected to the two sides of the mounting plate 213, and the mounting plate 213 is connected to the chair back 200.

[0046] In some embodiments, as shown in Figure 3 and Figure 5As shown, the first side rod 110 is rotatably connected with the connecting piece 210 through the rotating shaft 300, which is located between the upper surface and the lower surface of the first side rod 110. In this embodiment, the rotating shaft 300 can be fixedly connected with at most one of the first side rod 110 and the connecting piece 210 and rotatably connected with at least one of the first side rod 110 and the connecting piece 210, as long as the relative rotation between the first side rod 110 and the connecting piece 210 can be realized. The rotating shaft 300 can be a structural member independent of the first side rod 110 and the connecting piece 210, or can be a protruding structure in the first side rod 110 or the connecting piece 210, as long as the first side rod 110 and the connecting piece 210 can be connected and can rotate relative to each other after being connected.

[0047] In some embodiments, the first side rod 110 comprises a rod-shaped structural member 111 and a shell-shaped structural member 112. The rod-shaped structural member 111 is the main structure of the first side rod 110 and extends in the direction towards the chair back 200, and the rotating shaft 300 passes through the rod-shaped structural member 111 horizontally and perpendicularly to the extension direction of the rod-shaped structural member 111. The rod-shaped structural member 111 is a hollow structure with an opening at one end, and the shell-shaped structural member 112 is arranged at the end of the rod-shaped structural member 111 and covers the opening. Since the rod-shaped structural member 111 is a hollow structure with an opening at one end, the rod-shaped structural member 111 can be made of a commercially available metal tubular structural member, such as a metal square tube or a metal round tube. This not only enables the first side rod 110 to have a lighter weight, but also enables the production cost to be lower. Further, since the opening of the rod-shaped structural member 111 is covered with the shell-shaped structural member 112, on the one hand, it can avoid foreign matter from entering the inside of the rod-shaped structural member 111, thereby avoiding the accumulation of foreign matter at the position of the rotating shaft 300 to affect the relative rotation between the chair plate 100 and the chair back 200; on the other hand, it can cover the burrs at the end of the rod-shaped structural member 111 to reduce the safety hazard. In other embodiments, the rod-shaped structural member 111 can also be a solid structure.

[0048] Further, the shell-shaped structural member 112 is located between the first side plate 211 and the second side plate 212, i.e., during the rotation of the chair plate 100 relative to the chair back 200, the shell-shaped structural member 112 can also enter the space formed between the first side plate 211 and the second side plate 212.

[0049] In some embodiments, the shell-shaped structure 112 is a plastic structure, which has a certain deformation ability, so that the shell-shaped structure 112 can be easily installed on the end of the rod-shaped structure 111, and can be stably sleeved on the end of the rod-shaped structure 111 by interference fit. Wherein, the shell-shaped structure 112 is a plastic structure refers to that the shell-shaped structure 112 has plastic material at least on the outside, and the inside of the shell-shaped structure 112 can be a metal material. In other embodiments, the shell-shaped structure 112 can also be a metal material as a whole.

[0050] In some embodiments, as shown in Figure 6 The chair plate 100 further includes a second side rod 120, a cross beam 130 and a strip-shaped structure 140. The second side rod 120 is arranged in parallel with the first side rod 110, and both the first side rod 110 and the second side rod 120 are rotationally connected to the chair back 200. The cross beam 130 is connected to the first side rod 110 and the second side rod 120 away from the chair back 200.

[0051] The structures of the first side rod 110 and the second side rod 120 can be consistent or inconsistent. Further, the cross beam 130, the first side rod 110 and the second side rod 120 can all be metal structural members, and the cross beam 130 and the first side rod 110, and the cross beam 130 and the second side rod 120 are all connected by welding. In other embodiments, the cross beam 130, the first side rod 110 and the second side rod 120 can also be structural members of other materials, and the connection between the three can also be connected by threaded fasteners or other connection methods.

[0052] In some embodiments, a reinforcing member is further connected between the cross beam 130 and the first side rod 110, one end of the reinforcing member is connected to the cross beam 130, and the other end is connected to the first side rod 110. The reinforcing member plays a reinforcing role, and it is not difficult to understand that the reinforcing member has a certain rigidity, which can make the connection between the cross beam 130 and the first side rod 110 more reliable.

[0053] As in some embodiments, the reinforcing member is a metal structural member, and the reinforcing member and the cross beam 130, and the reinforcing member and the first side rod 110 are all connected by welding.

[0054] Further, the reinforcing member can be arranged below the cross beam 130 and the first side rod 110. In this embodiment, the reinforcing member can be a flat metal structural member. The reinforcing member can also be arranged at a position where the first side rod 110 and the cross beam 130 form an angle, and in this embodiment, if the first side rod 110 and the cross beam 130 are perpendicular, the reinforcing member is an L-shaped structural member.

[0055] In some embodiments, as shown in Figure 6As shown, it is also possible to provide a flat first reinforcement 151 below the crossbeam 130 and the first side rod 110, and to provide an L-shaped second reinforcement 152 at the position where the crossbeam 130 and the first side rod 110 form an angle.

[0056] Similarly, between the second side rod 120 and the crossbeam 130, a first reinforcement 151 can be provided on the lower side of the second side rod 120 and the crossbeam 130 in the manner described above; and a second reinforcement 152 can be provided at the position where the second side rod 120 and the crossbeam 130 form an angle.

[0057] Furthermore, the strip structure 140 is arranged parallel to the crossbeam 130, and its two ends are respectively connected to the first side bar 110 and the second side bar 120. In some embodiments, the strip structure 140 is directly used to contact the user's buttocks. In other embodiments, the chair seat 100 also includes a seat cushion disposed on the strip structure 140 as a flexible structural member to improve the user's comfort.

[0058] like Figure 1 and Figure 2 As shown in the embodiments, the folding chair provided in this application can be an office chair. The support leg 400 is fixedly connected to the chair seat 100, that is, the support leg 400 and the chair seat 100 cannot move relative to each other at the fixed connection position. The support leg 400 and the chair seat 100 may or may not be detached at the fixed connection position. In some embodiments, the support leg 400 is connected to the lower side of the chair seat 100; in other embodiments, the support leg 400 may be connected to both sides of the chair seat 100.

[0059] Furthermore, in some embodiments, the support leg 400 also includes a connecting rod and a roller assembly connected to each other. The connecting rod and the roller assembly can rotate relative to each other, so that the chair seat 100 and the roller assembly can rotate relative to each other; specifically, the direction of rotation is that the chair seat 100 rotates in the horizontal direction and the axis of rotation extends in the vertical direction. The connecting rod and the roller assembly can also extend and retract to adjust the height of the chair seat 100.

[0060] In the above embodiments, the chair seat 100 is fixedly connected to the support leg 400; therefore, the folding chair using the above technical solution can be applied to office chairs. In other embodiments, the folding chair provided in this application can also be a household chair.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A folding chair, characterized in that, The folding chair comprises a seat plate, a backrest and a leg, the seat plate is rotationally connected with the backrest, and the seat plate is fixedly connected with the leg; the seat plate comprises a first side rod extending towards the backrest; the backrest is provided with a connecting piece comprising a first side plate and a second side plate arranged oppositely, and one end of the first side rod towards the backrest is located between the first side plate and the second side plate and is rotationally connected with the connecting piece, so that the folding chair can be folded; The connecting piece further comprises a limiting block, one side of the limiting block is connected with the first side plate, and the other side of the limiting block is connected with the second side plate, the limiting block is located on a rotation path of the backrest, and the limiting block is configured to contact a lower side of the first side rod during opening of the folding chair, so as to limit rotation of the backrest away from an upper surface of the seat plate.

2. The folding chair of claim 1, wherein, The first side rod and the connecting piece are rotationally connected through a rotating shaft, and the rotating shaft is located between an upper surface and a lower surface of the first side rod.

3. The folding chair of claim 2, wherein, The first side rod comprises a rod-shaped structural member and a shell-shaped structural member, the rod-shaped structural member extends towards the backrest; the rod-shaped structural member is a hollow structure, and one end thereof towards the backrest has an opening, the shell-shaped structural member is arranged at an end of the rod-shaped structural member and covers the opening, and the shell-shaped structural member is located between the first side plate and the second side plate; the rotating shaft penetrates through the rod-shaped structural member.

4. The folding chair of claim 3, wherein, The shell-shaped structural member is a plastic structural member.

5. The folding chair of claim 3, wherein, The rotating shaft penetrates through the rod-shaped structural member and the shell-shaped structural member.

6. The folding chair of any of claims 1-5, wherein, The side of the seat plate away from the backrest further comprises a cross beam, the cross beam is connected with one end of the first side rod away from the backrest; the cross beam is weldedly connected with the first side rod.

7. The folding chair of claim 6, wherein, A first reinforcing member is further connected between the cross beam and the first side rod, one end of the first reinforcing member is welded with the cross beam, and the other end of the first reinforcing member is welded with the first side rod.

8. The folding chair of claim 7, wherein, The first reinforcing member is located at the lower side of the cross beam and the first side rod.

9. The folding chair of claim 6, wherein, The first side rod is perpendicular to the cross beam, and a second reinforcing member is further connected at a position where the first side rod and the cross beam form an included angle, the second reinforcing member is L-shaped, one end of the second reinforcing member is welded with the first side rod, and the other end of the second reinforcing member is welded with the cross beam.

10. The folding chair of claim 6, wherein, The seat plate further comprises a second side rod, the second side rod is connected with the first side rod on the same side of the cross beam; the backrest is further provided with the connecting piece connected with the second side rod.

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