Folding chair
By using support rods, support connecting plates and linkage components in the folding chair, the synchronous expansion and closing of multiple support rods is achieved, solving the problems of inconvenient operation and insufficient stability of the existing folding chair, and improving the user experience.
Patent Information
- Application Number
- CN202422230550.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The expansion and folding methods of the existing folding chairs are not convenient and fast enough. Multiple rods need to be operated separately, and the stability needs to be improved.
The folding bracket design is adopted that includes multiple support rods, support connecting plates and linking components. The link rod and the parallel pivot plane of the support rod are synchronized to be expanded and closed, and the stability is improved through the limit structure.
The linkage and synchronous operation of multiple support rods is realized, which simplifies the folding process and improves the stability and convenience of the folding chair.
Smart Images
Figure CN223068233U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of folding chairs, and particularly relates to a folding chair applicable to occasions such as tourism and outdoor activities, and a foldable wheelchair. Background Art
[0002] Folding chairs can be folded, and have the characteristics of being convenient to carry and store. They are applied to various indoor and outdoor scenarios, such as meetings, camping, etc. A folding chair generally includes a foldable chair frame and a cloth cover provided on the chair frame. The cloth cover is stretched by the chair frame to support the human body. The chair frame usually includes a plurality of pivotally connected rods.
[0003] However, folding chairs also have some problems. For example, whether the unfolding and folding methods of folding chairs are convenient and fast, especially whether the plurality of rods of the folding chair need to be operated separately to achieve unfolding and folding. Some structures for realizing the linkage of the plurality of rods of folding chairs have been proposed, but such linkage structures are not generally applicable to all folding chair configurations.
[0004] In addition, the stability of folding chairs will also affect people's experience of using folding chairs, and further improvement is still needed. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a folding chair to at least partially overcome the deficiencies in the prior art.
[0006] The utility model provides a folding chair, including a folding bracket and a flexible supporting surface. The flexible supporting surface is installed on the folding bracket. When the folding bracket is unfolded, the flexible supporting surface forms the seat surface of the folding chair. The folding bracket includes:
[0007] A plurality of support rods;
[0008] A support connection disk, the plurality of support rods are pivotally passed through the support connection disk, so that the plurality of support rods can be unfolded and folded relative to each other, and the pivot planes of the plurality of support rods surround the axis of the support connection disk; and
[0009] A linkage component, the linkage component is connected to the plurality of support rods, so that the plurality of support rods can be unfolded and folded synchronously. The linkage component includes a plurality of linkage rods and a linkage connection disk. One end of each linkage rod is pivotally connected to the corresponding support rod respectively, and the other end is pivotally connected to the linkage connection disk. The linkage connection disk is coaxially installed with the support connection disk. The pivot planes of the plurality of linkage rods surround the axis of the linkage connection disk, and the pivot plane of the linkage rod is parallel to the pivot plane of the support rod to which the linkage rod is connected.
[0010] Advantageously, the plurality of linkage rods are tangent to the outer surface of the linkage connection disk, and the pivot planes where the plurality of linkage rods are located surround the linkage connection disk.
[0011] Advantageously, the linkage connection disk includes a cylindrical member.
[0012] Advantageously, the linkage connection disk has a plurality of limit slot holes, the lower ends of the linkage rods are pivotally connected to the plurality of limit slot holes, the limit slot holes include inclined limit wall surfaces, and when the linkage rods installed in the limit slot holes are unfolded, the inclined limit wall surfaces are in contact with the linkage rods and prevent the linkage rods from further rotating in the direction of their unfolding.
[0013] Advantageously, the folding bracket further includes two sliders and two backrest support rods. Each of the backrest support rods is pivotally connected to one of the two support rods parallel to the pivot plane through the slider and is directly pivotally connected to the other. The slider is sleeved on the backrest support rod or the support rod and can slide along it.
[0014] Advantageously, the slider has a socket hole and a first pivot joint portion. There is a certain distance between the socket hole and the first pivot joint portion and a groove is formed between the two.
[0015] The socket hole allows one of the backrest support rod and the support rod to slidably pass through, and the first pivot joint portion pivotally connects the other of the support rod and the backrest support rod. Preferably, the first pivot joint portion includes a U-shaped groove.
[0016] Advantageously, the folding bracket further includes four vertical support rods, four first connectors, and four second connectors.
[0017] Each of the first connectors is sleeved on a corresponding vertical support rod, and the upper end of the linkage rod and the lower end of the corresponding support rod are respectively pivotally connected to the first connector.
[0018] Each of the second connectors is sleeved on a corresponding vertical support rod, and the upper end of the support rod is pivotally connected to the second connector.
[0019] One of the first connector and the second connector is a fixed connector fixed to the vertical support rod, and the other is a sliding connector that can move along the vertical support rod when the folding bracket is unfolded or folded up.
[0020] Advantageously, the first connecting member includes a mounting hole, a second pivoting portion and a third pivoting portion located on both sides of the mounting hole. Each first connecting member is sleeved on the corresponding vertical rod through the mounting hole. The upper end of the linkage rod and the lower end of the corresponding support rod are respectively pivotally connected to the second pivoting portion and the third pivoting portion. Preferably, the second pivoting portion and / or the third pivoting portion includes a U-shaped groove.
[0021] Advantageously, the second connecting member includes a communication hole and a fourth pivoting portion located on one side of the communication hole. Each second connecting member is sleeved on the corresponding vertical rod through the communication hole. The upper end of the support rod is pivotally connected to the fourth pivoting portion. Preferably, the fourth pivoting portion includes a U-shaped groove.
[0022] Advantageously, at least one of the vertical rods is provided with a limiter which abuts against the sliding connecting member when the folding chair is unfolded, thereby restricting its sliding position.
[0023] Advantageously, the folding bracket further includes at least one reinforcing rod. One end of each reinforcing rod is pivotally connected to the sliding connecting member sleeved on one of the two adjacent vertical rods, and the other end is directly pivotally connected to the other of the two vertical rods.
[0024] Advantageously, the at least one reinforcing rod includes two reinforcing rods installed between at least one pair of adjacent vertical rods. The two reinforcing rods cross each other and are pivotally connected in the middle.
[0025] Advantageously, rollers are installed at the lower ends of the four vertical rods of the folding chair, so that the folding chair is formed into a folding wheelchair, and when the folding wheelchair is in a folded state, it is formed into a walking aid.
[0026] Advantageously, the support connection disk has a plurality of limiting holes penetrating therethrough. The plurality of support rods are pivotally inserted into the plurality of limiting holes. When the support rod inserted into the limiting hole is unfolded, the limiting hole comes into contact with the support rod and prevents the support rod from further rotating in the direction of its unfolding.
[0027] Advantageously, a handle is installed on the seat surface of the folding chair.
[0028] According to the folding chair of the embodiment of the present utility model, the pivoting planes of a plurality of linkage rods surround the axis of the linkage connection disk, and the pivoting plane of the linkage rod is parallel to the pivoting plane of the support rod connected to the linkage rod, so that each linkage rod and the corresponding support rod can maintain the connection during the folding process and pivot flexibly respectively; on this basis, the linkage relationship between the pivoting of a plurality of linkage rods and the pivoting of a plurality of support rods is realized through the positional relationship between the support connection disk and the linkage connection disk. In short, by setting the linkage components as described above, a plurality of support rods whose pivoting planes surround the axis of the support connection disk can be made to be linked. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Other features, objects and advantages of the present utility model will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0030] Figure 1 Schematic structural diagram of an example of a folding chair according to Embodiment 1 of the present utility model;
[0031] Figure 2 is Figure 1 Schematic diagram when the folding bracket of the folding chair shown is folded up;
[0032] Figure 3 is Figure 1 Partial enlarged view when the folding bracket of the folding chair shown is unfolded;
[0033] Figure 4 is Figure 1 Schematic diagram of the linkage components of the folding chair shown;
[0034] Figure 5 is Figure 1 Schematic diagram of the support connection disk of the folding chair shown;
[0035] Figure 6 is Figure 1 Schematic diagram of the slider of the folding chair shown;
[0036] Figure 7 Schematic structural diagram of an example of a folding chair according to Embodiment 2 of the present utility model;
[0037] Figure 8 is Figure 7 Schematic diagram when the folding bracket of the folding chair shown is folded up;
[0038] Figure 9 is Figure 7 Partial enlarged view of the linkage components of the folding chair shown;
[0039] Figure 10 is Figure 9 Schematic diagram of the linkage connection disk of the linkage components shown;
[0040] Figure 11 is a partial cross-sectional view taken along the position shown by the midline A-A Figure 10 in the figure;
[0041] Figure 12 is Figure 7 a schematic diagram of the first connecting member of the folding chair shown;
[0042] Figure 13 is Figure 7 a schematic diagram of the second connecting member of the folding chair shown;
[0043] Figure 14 is a schematic diagram of an example of a folding chair according to Embodiment 3 of the present utility model;
[0044] Figure 15 is a schematic diagram of an example of a folding chair according to Embodiment 4 of the present utility model;
[0045] Figure 16 is a schematic diagram of an example of a folding chair according to Embodiment 5 of the present utility model. Specific Embodiments
[0046] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. For the convenience of description, only the parts related to the invention are shown in the drawings. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0047] First, refer to Figures 1 to 6 to introduce the folding chair according to Embodiment 1 of the present utility model.
[0048] Figure 1 is a schematic structural diagram of an example of the folding chair A according to Embodiment 1 of the present utility model. As Figure 1 shown, the folding chair A according to the embodiment of the present utility model includes a folding bracket Aa and a flexible supporting surface Ab. The flexible supporting surface Ab of the folding chair A is installed on the folding bracket Aa. When the folding bracket Aa is unfolded, the flexible supporting surface Ab forms the seat surface of the folding chair A. It should be understood that the seat surface can include not only the seating surface, but also parts such as the backrest that can be used to support the user.
[0049] Figure 2 is Figure 1 a schematic diagram when the folding bracket Aa of the folding chair A shown is folded up, Figure 3 is Figure 1 a partial enlarged view when the folding bracket Aa of the folding chair A shown is unfolded. As Figures 1 to 3As shown, the folding bracket Aa of the folding chair A includes a plurality of support rods 1, a support connection disk 2, and a linkage member 3. The plurality of support rods 1 are pivotally inserted through the support connection disk 2, enabling the plurality of support rods 1 to unfold relative to each other (see Figure 1 and Figure 3 ) and fold up (see Figure 2 ). The plurality of support rods 1 can each rotate about a corresponding pivot axis, thereby always remaining in a plane (i.e., the pivot plane) perpendicular to the pivot axis. Figure 3 Schematically shows the pivot plane S1 of a support rod 1 and the axis Y1 of the support connection disk 1. As Figure 3 shown, according to an embodiment of the present invention, the pivot plane S1 of the support rod 1 deviates from the axis of the support connection disk 2. Thus, although Figure 3 the pivot planes S1 of all the support rods 1 are not shown, it can be understood that the pivot planes S1 of the plurality of support rods 1 surround the axis Y1 of the support connection disk 2.
[0050] The folding bracket Aa constructed in this way allows the plurality of support rods 1 to be pivotally inserted through the support connection disk 2 simultaneously without interfering with each other spatially during the folding process, which is beneficial to simplifying the structure of the folding bracket and making the folding operation more convenient. However, there is no linkage mechanism in the prior art that can be applied to such a folding bracket. The folding chair according to an embodiment of the present invention solves this problem.
[0051] According to an embodiment of the present invention, the linkage member 3 of the folding bracket Aa is connected to the plurality of support rods 1, enabling the plurality of support rods 1 to unfold and fold up synchronously, realizing the linkage between the plurality of support rods 1. As Figure 1 shown, the linkage member 3 includes a plurality of linkage rods 31 and a linkage connection disk 32. One end of each linkage rod 31 is pivotally connected to a corresponding support rod 1 respectively, and the other end is pivotally connected to the linkage connection disk 32. According to an embodiment of the present invention, the linkage connection disk 32 of the linkage member 3 is coaxially installed with the support connection disk 2 (see Figure 1 ). The plurality of linkage rods 31 can each rotate about a corresponding pivot axis, thereby always remaining in a plane (i.e., the pivot plane) perpendicular to the pivot axis. Figure 4 For Figure 1 a schematic diagram of the linkage member 3 of the folding chair A shown, which schematically shows the pivot plane S2 of a linkage rod 31 and the axis Y2 of the linkage connection disk 32. As Figure 4 shown, according to an embodiment of the present invention, the pivot plane S2 of the linkage rod 31 deviates from the axis of the linkage connection disk 32. Although Figure 4The pivot planes S2 of all the linkage rods 31 are not shown, but it can be understood that the pivot planes S2 of multiple linkage rods 31 surround the axis Y2 of the linkage connection disk 32. At the same time, according to the embodiment of the present invention, the folding bracket Aa is configured such that the pivot plane S2 of the linkage rod 31 is parallel to the pivot plane S1 of the support rod 1 connected to the linkage rod 31. Here, "parallel" includes the case where the pivot plane S2 of the linkage rod 31 coincides with the pivot plane S1 of the corresponding support rod 1. The state where the pivot plane of the linkage rod is parallel but not coincident with the pivot plane of the corresponding support rod is mainly due to the slight offset caused by the part thickness of the linkage rod and the support rod.
[0052] In the folding chair A according to the embodiment of the present invention, the pivot planes S2 of multiple linkage rods 31 surround the axis Y2 of the linkage connection disk 32, and the pivot plane S2 of the linkage rod 31 is parallel to the pivot plane S1 of the support rod 1 connected to the linkage rod 31, so that each linkage rod 31 and the corresponding support rod 1 can maintain connection and pivot flexibly during the folding process; on this basis, the linkage relationship between the pivots of multiple linkage rods 31 and the pivots of multiple support rods 1 is realized through the positional relationship between the support connection disk 2 and the linkage connection disk 3. In short, by providing the linkage member 3 as described above, multiple support rods 1 whose pivot planes S1 surround the axis Y1 of the support connection disk 1 can be made to be linked, and it is smoother and more labor-saving when unfolding or folding the folding chair A.
[0053] Figure 5 is Figure 1 a schematic diagram of the support connection disk 2 of the folding chair A shown. As Figure 5 shown, it schematically shows that the support connection disk 2 can have multiple limiting holes 21 penetrating therethrough, and multiple support rods 1 are pivotally arranged in the multiple limiting holes 21 (see Figure 3 ), and when the support rod 1 passing through itself in the limiting hole 21 is unfolded, it comes into contact with the support rod 1 and prevents the support rod 1 from further rotating along the direction of its unfolding. The support connection disk 2 can play a role in supporting multiple support rods 1. It should be understood that the contact formed between the limiting hole 21 and the support rod 1 passing through itself when unfolded can be point, line or surface contact, preferably surface contact.
[0054] As Figure 4 shown in the example, multiple linkage rods 31 of the linkage member 3 can be tangent to the outer surface of the linkage connection disk 32, and the pivot planes where multiple linkage rods 31 are located can surround the linkage connection disk 32, so that the linkage member 3 can move more smoothly and stably. Figure 4In the illustrated example, the linkage rod 31 may be a long sheet-shaped component. Connection holes may be provided at both ends of the long sheet-shaped linkage rod 31 for pivotally connecting the support rod 1 and the linkage connection disk 32 respectively. The linkage connection disk 32 may include a cylindrical component. A plurality of mounting holes corresponding to the connection holes of the plurality of linkage rods 31 may be provided on the side wall of the cylindrical linkage connection disk 32, and the connection holes of the plurality of linkage rods 31 and the mounting holes of the linkage connection disk 32 may be pivotally connected together by pins. It should be understood that the structure of the linkage connection disk 32 according to the embodiments of the present invention is not limited to Figure 4 the illustrated cylindrical component, and the linkage connection disk 32 may also be a square cylindrical or other cylindrical component. In addition, the linkage rod 31 according to the embodiments of the present invention may also be a round rod or other long-shaped or non-long-shaped components, as long as the function of the linkage rod 31 can be achieved.
[0055] Referring to Figure 1 and Figure 2 the illustrated example, the folding bracket Aa of the folding chair A according to the embodiments of the present invention may further include two sliders 4 and two backrest support rods 5. The backrest support rods 5 and the flexible supporting surface Ab cooperate to form the backrest of the folding chair A. Each backrest support rod 5 may be pivotally connected to the upper end of one of the two support rods 1 parallel to the pivot plane S1 through the slider 4 and directly pivotally connected to the other one. The slider 4 is sleeved on the backrest support rod 5 and can slide along the backrest support rod 5 on which the slider 4 is sleeved, so that the backrest of the folding chair A can be folded. In some other examples, each backrest support rod 5 may be pivotally connected to one of the two support rods 1 parallel to the pivot plane S1 through the slider 4 and directly pivotally connected to the upper end of the other one.
[0056] The present invention is not limited to the technical means of the above-mentioned slider 4 sleeved on the backrest support rod 5. In some other examples, the two sliders 4 may be respectively sleeved on the two support rods 1 parallel to the pivot plane S1, which will not be elaborated here.
[0057] Figure 6 For Figure 1 the schematic diagram of the slider 4 of the illustrated folding chair A. As Figure 6 shown, it schematically shows that the slider 4 may have a socket hole 41 and a first pivot portion 42. The socket hole 41 and the first pivot portion 42 are spaced apart by a certain distance and a groove 43 is formed therebetween. Optionally, the first pivot portion 42 may include a U-shaped groove or may also include a sheet-shaped mounting component. By providing the groove 43 between the socket hole 41 and the first pivot portion 42, the slider 4 can withstand relatively large deformation during the sliding process, making the sliding process of the slider 4 smoother.
[0058] According to an embodiment of the present utility model, the socket hole 41 of the slider 4 can allow one of the backrest support rod 5 and the support rod 1 to slidably pass through, and the first pivot portion 42 can pivotally connect the other of the support rod 1 and the backrest support rod 5. For example, in Figure 1 and Figure 2 In the example shown, the socket hole 41 of the slider 4 allows the backrest support rod 5 to slidably pass through, and the first pivot portion 42 pivotally connects the support rod 1. In other examples, such as the example where the two sliders 4 are respectively sleeved on the two support rods 1 with the pivot planes S1 parallel to each other, the socket hole 41 is used for the support rod 1 to slidably pass through, and the first pivot portion 42 is used for pivotally connecting the backrest support rod 5.
[0059] Returning to the reference Figure 1 In the example shown, a handle Aba can also be installed on the flexible support surface Ab of the folding chair A. Preferably, the handle Aba is installed on the seat surface formed by the flexible support surface Ab. When using the folding chair A, the folding chair can be folded by pulling the handle Aba.
[0060] The following will combine Figures 7 to 13 to introduce the folding chair B according to Embodiment II of the present utility model. The folding chair B according to Embodiment II of the present utility model has substantially the same structure as the folding chair A according to Embodiment I of the present utility model, and the main difference lies in: the folding bracket Ba of the folding chair B.
[0061] Figure 7 FIG. is a schematic structural diagram of an example of the folding chair B according to Embodiment II of the present utility model. As Figure 7 shown, the folding chair B according to Embodiment II of the present utility model includes a folding bracket Ba and a flexible support surface Bb. A handle Bba can be installed on the flexible support surface Bb. Preferably, the handle Bba is installed on the seat surface formed by the flexible support surface Bb.
[0062] Figure 8 For Figure 7 FIG. is a schematic diagram when the folding bracket Ba of the folding chair B shown is retracted. As Figure 8 shown in the example, the folding bracket Ba of the folding chair B includes a support rod 1, a support connection disk 2, and a linkage member 3'. The support rod 1 and the support connection disk 2 can adopt the same or similar structures as the support rod 1 and the support connection disk 2 of the folding chair A according to Embodiment I of the present utility model, and will not be elaborated here. For the linkage member 3', it will be introduced in more detail in combination with Figures 7 to 11
[0063] Continuing to refer to Figure 7 the example shown, the linkage member 3' of the folding bracket Ba is connected to a plurality of support rods 1, so that the plurality of support rods 1 can be deployed synchronously (see Figure 7 ) and retracted (see Figure 8 ), to achieve the linkage between multiple support rods 1. The linkage component 3' includes multiple linkage rods 31' and a linkage connection disk 32'. One end of each linkage rod 31' is pivotally connected to the corresponding support rod 1 respectively, and the other end is pivotally connected to the linkage connection disk 32'. According to an embodiment of the present invention, the linkage connection disk 32' of the linkage component 3' is coaxially installed with the support connection disk 2 (see Figure 7 ). Figure 9 is Figure 7 a partial enlarged view of the linkage component 3' of the folding chair B shown, Figure 9 schematically showing the pivot plane S2' of a linkage rod 31' and the axis Y2' of the linkage connection disk 32'. According to an embodiment of the present invention, the pivot plane S2 of the linkage rod 31' deviates from the axis Y2' of the linkage connection disk 32'. Although the pivot planes S2' of all the linkage rods 31' are not shown, it can be understood that the pivot planes S2' of multiple linkage rods 31' surround the axis Y2' of the linkage connection disk 32'. At the same time, according to an embodiment of the present invention, the pivot plane S2' of the linkage rod 31' is parallel to the pivot plane S1 of the support rod 1 to which the linkage rod 31' is connected. The folding chair B according to the second embodiment of the present invention has at least the same beneficial effects as the folding chair A according to the first embodiment, which will not be elaborated here.
[0064] Figure 9 schematically shows the overall structure diagram of the linkage component 3'. As Figure 9 shown, it schematically shows that the linkage rod 31' can be a cylindrical rod, and the linkage rod 31' is pivotally inserted into the linkage connection disk 32'. Figure 10 is Figure 9 a schematic diagram of the linkage connection disk 32' of the linkage component 3' shown. As Figure 10 shown, it schematically shows that the linkage connection disk 32' has multiple limiting slot holes 321', and the lower end of the linkage rod 31' is pivotally connected in the multiple limiting slot holes 321' (see Figure 9 ). Figure 11 is a partial cross-sectional view taken along the position of the section line A-A in Figure 10 . As Figure 11 shown, it schematically shows that the limiting slot hole 321' can include an inclined limiting wall surface 3211'. When the linkage rod 31' installed in the limiting slot hole 321' is unfolded, the inclined limiting wall surface 3211' comes into contact with the linkage rod 31' and prevents the linkage rod 31' from further rotating along the direction of its unfolding. Optionally, when the linkage rod 31' installed in the limiting slot hole 321' is unfolded, the contact between the inclined limiting wall surface 3211' and the linkage rod 31' can be point, line or surface contact, preferably surface contact.
[0065] Continuing to refer to Figure 7 andFigure 8 , according to the folding bracket Ba of the folding chair B in the second embodiment of the present utility model, it further includes four vertical rods 6, four first connecting members 7, and four second connecting members 8. Each first connecting member 7 is sleeved on the corresponding vertical rod 6, the upper end of the linkage rod 31' and the lower end of the corresponding support rod 1 are respectively pivotally connected to the first connecting member 7, each second connecting member 8 is sleeved on the corresponding vertical rod 6, and the upper end of the support rod 1 is pivotally connected to the second connecting member 8. The first connecting member 7 is a fixed connecting member, which is fixed to the vertical rod 6, and the second connecting member 8 is a sliding connecting member, which can move along the vertical rod 6 when the folding bracket Ba is unfolded or folded. Optionally, the fixed connecting member can be fixed to the vertical rod 6 by a pin or a bolt.
[0066] The present utility model is not limited thereto. In some other examples, the second connecting member 8 is a fixed connecting member, and the first connecting member 7 is a sliding connecting member, which will not be elaborated herein.
[0067] According to the folding chair B of the embodiment of the present utility model, by providing the linkage component 3' with the above structure, the inclined limiting wall surface 3211' of the linkage connecting disc 32' of the linkage component 3' can abut against the linkage rod 31' when the folding chair B is unfolded, so as to provide a supporting force for the linkage rod 31'. On this basis, the support rod 1 and the linkage rod 31' of the linkage component 3' are connected to the first connecting member 7 installed on the vertical rod 6. Through the positional relationship between the support connecting disc 2 and the linkage connecting disc 32', the supporting force provided by the inclined limiting wall surface 3211' can be transmitted to the vertical rod 6 and the support rod 1 through the first connecting member 7, thereby further improving the supporting stability of the folding chair B.
[0068] Figure 12 For Figure 7 the schematic diagram of the first connecting member 7 of the folding chair B shown. As Figure 12 shown, it schematically shows that the first connecting member 7 may include a mounting hole 71, a second pivoting portion 72, and a third pivoting portion 73. The second pivoting portion 72 and the third pivoting portion 73 may be located on both sides of the mounting hole 71. Each first connecting member 7 is sleeved on the corresponding vertical rod 6 through the mounting hole 71, and the upper end of the linkage rod 31' and the lower end of the corresponding support rod 1 are respectively pivotally connected to the second pivoting portion 72 and the third pivoting portion 73. Optionally, the second pivoting portion 72 or the third pivoting portion 73 may be a U-shaped groove or a sheet-shaped mounting member.
[0069] Figure 13 For Figure 7 the schematic diagram of the second connecting member 8 of the folding chair B shown. As Figure 14As shown, it schematically shows that the second connecting member 8 may include a communication hole 81 and a fourth pivoting portion 82, and the fourth pivoting portion 82 may be located on one side of the communication hole 81. Each second connecting member 8 is sleeved on the corresponding vertical rod 6 through the communication hole 81, and the upper end of the support rod 1 is pivotally connected to the fourth pivoting portion 82. Optionally, the second pivoting portion 72 or the third pivoting portion 73 may be a U-shaped groove or a sheet-shaped mounting member.
[0070] As Figure 7 and Figure 8 shown, at least one vertical rod 6 may be provided with a stopper 9, and the stopper 9 abuts against the sliding connecting member when the folding chair B is unfolded, thereby restricting its downward sliding position. For example, in Figure 7 and Figure 8 the example shown, the second connecting member 8 is a sliding connecting member, which can move along the vertical rod 6, and the stopper 9 can be installed at a position on the vertical rod 6 below the second connecting member 8. The stopper 9 can abut against the second connecting member 8 when the folding chair B is unfolded, thereby restricting its downward sliding position. By providing the stopper 9, the support stability of the folding chair B when unfolded can be improved.
[0071] In some other examples, such as in the example where the first connecting member 7 as described above is a sliding connecting member, the stopper 9 can be installed at a position on the vertical rod 6 below the first connecting member 7 to achieve the limitation of the first connecting member 7, which will not be elaborated here.
[0072] Continuing to refer to Figure 7 and Figure 8 the example shown, rollers Bc can be installed at the lower ends of the four vertical rods 6 of the folding chair B, so that the folding chair B is formed into a folding wheelchair. The folding chair B can also be provided with a foldable and retractable footrest Bd. In addition, the folding chair B can also be provided with a handle Be facing the front of the folding wheelchair. When the folding wheelchair is in the folded state (see Figure 12 ), the user can make the rollers Bc move correspondingly by pushing the handle Be. This enables the folding chair B to be used as a walking aid when in the folded state, thus making the functions of the folding chair B more diverse.
[0073] The following will refer to Figure 14 to introduce the folding chair B' according to Embodiment 3 of the present invention. The folding chair B' according to Embodiment 3 of the present invention has basically the same structure as the folding chair B according to Embodiment 2 of the present invention, and the main difference lies in that: the folding bracket Ba' of the folding chair B' further includes at least one reinforcing rod 10.
[0074] Figure 14 is a schematic diagram of an example of the folding chair B' according to Embodiment 3 of the present invention (the flexible support surface is not shown). As Figure 14In the illustrated example, the folding support Ba' of the folding chair B' may further include at least one reinforcing rod 10. One end of each reinforcing rod 10 is pivotally connected to a sliding connector sleeved on one of the two adjacent vertical struts 6, and the other end of the reinforcing rod 10 is directly pivotally connected to the other of the two vertical struts 6. By providing the reinforcing rod 10, the folding chair B' can be made smoother when unfolding and folding, and the linkage between the plurality of support rods 1 and the stability of the folding support Ba' can be improved.
[0075] Two adjacent vertical struts 1 adjacent to each other in the circumferential direction of the folding chair B' may form a pair of adjacent vertical struts 1. According to an embodiment of the present invention, two reinforcing rods 10 are installed between at least one pair of adjacent vertical struts 1, and the two reinforcing rods 10 cross each other and are pivotally connected in the middle (see Figure 14 ). This can make the two reinforcing rods 10 move more smoothly and improve the linkage and stability of the folding support Ba'.
[0076] Taking into account the manufacturing cost and support stability of the folding chair B', two reinforcing rods 10 can be respectively installed between a pair of adjacent vertical struts 1 with a handle Be installed and between a pair of adjacent vertical struts 1 opposite thereto.
[0077] It should be understood that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept of the linkage components.
[0078] For example, Figure 15 is a schematic diagram of an example of the folding chair B'' according to Embodiment 4 of the present invention (the flexible support surface is not shown). As Figure 15 shown in the example, the folding chair B'' according to Embodiment 4 of the present invention has basically the same structure as the folding chair B' according to Embodiment 3 of the present invention, the difference being that the linkage component 3 of the folding chair B'' adopts the same or similar structure as the Figure 4 shown linkage component 3, so as to realize the linkage function of the folding chair B'', which will not be elaborated here.
[0079] For another example, Figure 16 is a schematic diagram of an example of the folding chair A' according to Embodiment 5 of the present invention (the flexible support surface is not shown). As Figure 16 shown in the example, the folding chair A' according to Embodiment 5 of the present invention has basically the same structure as the folding chair A according to Embodiment 1 of the present invention, the difference being that the linkage component 3' of the folding chair A adopts the same or similar structure as the Figure 9The same or similar structures of the linkage member 3' shown are adopted to realize the linkage function of the folding chair A', which will not be elaborated here.
[0080] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.
Claims
1. A folding chair, comprising a folding bracket and a flexible supporting surface, the flexible supporting surface being mounted on the folding bracket, and when the folding bracket is unfolded, the flexible supporting surface forms the seat surface of the folding chair, characterized in that, The folding bracket includes: A plurality of support rods; A support connection disk, wherein the plurality of support rods are pivotally inserted through the support connection disk, such that the plurality of support rods can be deployed and retracted relative to each other, and the pivot planes of the plurality of support rods surround the axis of the support connection disk; and A linkage component, which is connected to the plurality of support rods, such that the plurality of support rods can be deployed and retracted synchronously. The linkage component includes a plurality of linkage rods and a linkage connection disk. One end of each linkage rod is pivotally connected to the corresponding support rod respectively, and the other end is pivotally connected to the linkage connection disk. The linkage connection disk is coaxially installed with the support connection disk. The pivot planes of the plurality of linkage rods surround the axis of the linkage connection disk, and the pivot plane of the linkage rod is parallel to the pivot plane of the support rod to which the linkage rod is connected.
2. The folding chair according to claim 1, wherein, The plurality of linkage rods are tangent to the outer surface of the linkage connection disk, and the pivot planes where the plurality of linkage rods are located surround the linkage connection disk.
3. The folding chair according to claim 2, wherein The linkage connection disk includes a cylindrical component.
4. The folding chair according to claim 1, wherein The linkage connection disk has a plurality of limiting slot holes, and the lower end of the linkage rod is pivotally connected in the plurality of limiting slot holes. The limiting slot holes include inclined limiting wall surfaces, and when the linkage rod installed in the limiting slot hole is deployed, the inclined limiting wall surfaces come into contact with the linkage rod and prevent the linkage rod from further rotating in the direction of its deployment.
5. The folding chair according to any one of claims 1-4, characterized in that The folding bracket further includes two sliders and two backrest support rods. Each backrest support rod is pivotally connected to one of the two support rods parallel to the pivot plane through the slider, and is directly pivotally connected to the other. The slider is sleeved on the backrest support rod or the support rod and can slide along it.
6. The folding chair according to claim 5, characterized in that, The slider has a socket hole and a first pivot joint part. There is a certain distance between the socket hole and the first pivot joint part and a slot is formed therebetween. The socket hole allows one of the backrest support rod and the support rod to slidably pass through, and the first pivot joint part pivotally connects the other of the support rod and the backrest support rod. The first pivot joint part includes a U-shaped groove.
7. The folding chair according to any one of claims 1-4, characterized in that, The folding bracket further includes four vertical support rods, four first connecting parts and four second connecting parts. Each first connecting part is sleeved on the corresponding vertical support rod, and the upper end of the linkage rod and the lower end of the corresponding support rod are pivotally connected to the first connecting part respectively. Each second connecting part is sleeved on the corresponding vertical support rod, and the upper end of the support rod is pivotally connected to the second connecting part. One of the first connecting part and the second connecting part is a fixed connecting part fixed to the vertical support rod, and the other is a sliding connecting part that can move along the vertical support rod when the folding bracket is deployed or retracted.
8. The folding chair according to claim 7, wherein, The first connecting part includes a mounting hole, a second pivot joint part and a third pivot joint part located on both sides of the mounting hole. Each first connecting part is sleeved on the corresponding vertical support rod through the mounting hole. The upper end of the linkage rod and the lower end of the corresponding support rod are pivotally connected to the second pivot joint part and the third pivot joint part respectively. The second pivot joint part and / or the third pivot joint part includes a U-shaped groove.
9. The folding chair according to claim 7, wherein, The second connecting member includes a communication hole and a fourth pivoting portion located on one side of the communication hole. Each of the second connecting members is sleeved on the corresponding vertical rod through the communication hole, and the upper end of the support rod is pivotally connected to the fourth pivoting portion. The fourth pivoting portion includes a U-shaped groove.
10. The folding chair according to claim 7, wherein, At least one of the vertical rods is provided with a stopper. When the folding chair is unfolded, the stopper abuts against the sliding connecting member to limit its downward sliding position.
11. The folding chair according to claim 7, wherein, The folding bracket further includes at least one reinforcing rod. One end of each reinforcing rod is pivotally connected to the sliding connecting member sleeved on one of the two adjacent vertical rods, and the other end is directly pivotally connected to the other of the two vertical rods.
12. The folding chair according to claim 11, wherein, The at least one reinforcing rod includes two reinforcing rods installed between at least one pair of adjacent vertical rods. The two reinforcing rods cross each other and are pivotally connected in the middle.
13. The folding chair according to claim 7, characterized in that, Rollers are installed at the lower ends of the four vertical rods of the folding chair, so that the folding chair is formed into a folding wheelchair. When the folding wheelchair is in a folded state, it is formed into a walking aid.
14. The folding chair according to any one of claims 1-4, characterized in that, The support connection disk has a plurality of limiting holes provided therethrough. The plurality of support rods are pivotally inserted into the plurality of limiting holes. When the support rod inserted into the limiting hole is unfolded, the limiting hole comes into contact with the support rod and prevents the support rod from further rotating in the direction of its unfolding.
15. The folding chair according to any one of claims 1-4, characterized in that, A handle is installed on the seat surface of the folding chair.