Folding chair

Abstract

The utility model discloses a folding chair which comprises two groups of side brackets on two sides, in an unfolded state, each group of side bracket comprises a supporting rod extending along the vertical direction, a bottom supporting rod and an adjusting component, and one end part of the bottom supporting rod is rotatably connected with the lower part of the supporting rod; the adjusting assembly comprises a first adjusting piece and a second adjusting piece which are connected with each other and extend in the vertical direction, the upper portion of the first adjusting piece is rotationally connected with the supporting rod, and the lower portion of the second adjusting piece is rotationally connected with the bottom supporting rod. The first adjusting piece and the second adjusting piece can be folded relatively and the height of the upper part of the first adjusting piece can be adjusted; the height of the folding chair can be adjusted through the adjusting assembly, and functions of the folding chair are enriched.

Description

Technical Field

[0001] This utility model relates to a folding chair. Background Technology

[0002] In the existing technology, some seats have a folding function, which makes it convenient to store and carry them after they are folded. However, most foldable seats have a single mode when unfolded, which only provides users with a sitting position. Users will feel uncomfortable sitting in this position for a long time, which greatly reduces the user experience. Utility Model Content

[0003] The purpose of this invention is to provide a new type of folding chair.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a folding chair, comprising two sets of side supports disposed on both sides along a first direction, wherein in the unfolded state, each set of side supports includes:

[0005] The support rod extends at an angle in the vertical direction;

[0006] A bottom support rod extends along a second direction, which is perpendicular to the first direction. One end of the bottom support rod is rotatably connected to the lower part of the support rod around a first rotation center line.

[0007] The adjustment assembly includes a first adjustment member and a second adjustment member that are interconnected and extend vertically. The upper part of the first adjustment member is rotatably connected to the support rod about a second rotation center line, and the lower part of the second adjustment member is rotatably connected to the bottom support rod about a third rotation center line. The first and second adjustment members are configured to move relatively closer to or further away from each other to adjust the height of the support rod. The first, second, and third rotation center lines are parallel to each other and extend along the first direction.

[0008] In some embodiments, in the unfolded state, the lower part of the first adjusting member and the upper part of the second adjusting member are rotatably connected about a fourth rotation center line, the fourth rotation center line extending along the first direction, and the support rod, the bottom support rod, the first adjusting member and the second adjusting member constitute a four-bar linkage mechanism.

[0009] Preferably, in the unfolded state, the second adjusting member extends obliquely from top to bottom toward the first rotation center line;

[0010] And / or, in the unfolded state, there is an angle between the length extension direction of the first adjusting member and the length extension direction of the second adjusting member;

[0011] And / or, the lower part of the second adjusting member is slidably and rotatably connected to the bottom support rod, and when the folding chair is in the folded state, the lower part of the second adjusting member is closer to the first rotation center line.

[0012] In some embodiments, the side support further includes a diagonal brace, one of the lower portion of the first adjusting member and the upper portion of the second adjusting member being rotatably connected to one end of the diagonal brace, the other end of the diagonal brace being connected to the bottom support.

[0013] In some embodiments, the diagonal brace includes a first segment and a second segment rotatably connected, the lower part of the first adjusting member, the upper part of the second adjusting member, and the first segment are rotatably connected about the fourth rotation center line, the second segment is rotatably connected to the bottom support rod, and the second adjusting member, the bottom support rod, the first segment, and the second segment constitute a four-bar linkage.

[0014] In some embodiments, the second rod segment is rotatably connected to the bottom support rod about a fifth rotation center line. Along the length extension direction of the bottom support rod, the third rotation center line is located between the first rotation center line and the fifth rotation center line. At least one of the second adjusting member and the second rod segment is slidably rotatably connected to the bottom support rod. When the folding chair is in the folded state, the diagonal brace and the second adjusting member are unfolded relative to each other along the second direction, and the diagonal brace and the second adjusting member are folded up above the bottom support rod.

[0015] In some embodiments, the folding chair further includes a cross brace assembly connected between the two side supports and capable of being folded along the first direction. When the folding chair is in a folded state, the cross brace assembly is folded along the first direction, and the two side supports are retracted along the first direction.

[0016] In some embodiments, the bottom support rod includes a first bottom rod and a second bottom rod that extend along a second direction and are slidably disposed along the length direction. One end of the first bottom rod is rotatably connected to the lower part of the support rod about a first rotation center line, and the lower part of the second adjusting member is rotatably connected to the second bottom rod about a third rotation center line. The lower part of the second adjusting member is rotatably connected to the second bottom rod about a third rotation center line. When the folding chair is in a folded state, the support rod and the bottom support rod are folded relative to each other, the first bottom rod and the second bottom rod are slidably folded, and the adjusting component is folded between the support rod and the bottom support rod.

[0017] The cross bracing assembly includes a cross bracing frame disposed between the two bottom support rods. The cross bracing frame includes two bottom support rods that cross each other and are rotatably connected at the intersection. One end of each bottom support rod is directly or indirectly rotatably connected to the first bottom support rod, and the other end of each bottom support rod is directly or indirectly rotatably connected to the second bottom support rod.

[0018] The side support also includes diagonal braces. In the unfolded state, the upper part of the diagonal brace is rotatably connected to the adjustment assembly, the lower part of the diagonal brace is connected to the first bottom rod, one end of each bottom support rod is rotatably connected to the lower part of the second adjustment member on one side, and the other end of the bottom support rod is rotatably connected to the lower part of the diagonal brace on the other side.

[0019] In some embodiments, the first adjusting member and the second adjusting member are slidably and telescopically disposed along the length direction.

[0020] In some embodiments, the first adjusting member includes a first connecting portion and a second connecting portion that are slidably connected along the length direction. The first connecting portion is rotatably connected to the support rod, and the second connecting portion is connected to the second adjusting member. An elastic member is provided between the first connecting portion and the second connecting portion, and the elastic member is configured to provide a force for the relative unfolding of the first connecting portion and the second connecting portion.

[0021] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The folding chair of this utility model adjusts the height of the second rotation center line by driving the first adjusting member and the second adjusting member to fold relative to each other. Then, under the drive of the first adjusting member, the support rod moves downward relative to the bottom support rod, and the included angle between the support rod and the bottom support rod becomes smaller. Thus, the height of the sitting structure set on the support rod will also be reduced. Conversely, driving the first adjusting member and the second adjusting member to unfold relative to each other can drive the height of the sitting structure to rise, thereby realizing the height adjustment of the folding chair in the unfolded state and enriching the function of the folding chair. Attached Figure Description

[0022] Appendix Figure 1 This is a perspective view of the folding chair in the first state according to Embodiment 1 of this utility model;

[0023] Appendix Figure 2 For the appendix Figure 1 Side view;

[0024] Appendix Figure 3 For the appendix Figure 2 A schematic diagram showing the adjustment components in the second state relative to the folded chair;

[0025] Appendix Figure 4 For the appendix Figure 3 A schematic diagram showing the adjustment components relative to the folded chair in its third state;

[0026] Appendix Figure 5 This is a schematic diagram of the first step of the folding process of the folding chair in Example 1;

[0027] Appendix Figure 6 This is a schematic diagram of the second step of the folding process of the folding chair in Example 1;

[0028] Appendix Figure 7 This is a schematic diagram of the third step of the folding process of the folding chair in Example 1;

[0029] Appendix Figure 8 For the appendix Figure 7 Top view;

[0030] Appendix Figure 9 This is a side view of the folding chair in the folded state according to Example 1;

[0031] Appendix Figure 10 For the appendix Figure 9 Top view;

[0032] Appendix Figure 11 This is a schematic diagram of the folding chair in the first state according to Embodiment 2 of this utility model;

[0033] Appendix Figure 12 For the appendix Figure 11 A schematic diagram showing the adjustment components in the second state relative to the folded chair;

[0034] Appendix Figure 13 For the appendix Figure 12 A schematic diagram showing the adjustment components relative to the folded chair in its third state;

[0035] The components are as follows: 100, side support; 200, seat; 201, seat; 202, backrest; 1, support rod; 11, first support rod; 12, second support rod; 2, bottom support rod; 21, first bottom rod; 22, second bottom rod; 3, adjustment assembly; 31, first adjustment component; 32, second adjustment component; 4, diagonal brace; 41, first rod segment; 42, second rod segment; 5, cross brace; 51, bottom support rod; 61, upper support rod; 71, lower support rod. Detailed Implementation

[0036] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments, so that the advantages and features of this utility model can be more easily understood by those skilled in the art. Obviously, the embodiments described in this application are only a part of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0037] Example 1

[0038] See Figures 1 to 4 A folding chair is shown, comprising two sets of side supports 100 disposed on both sides along a first direction. In the unfolded state, each set of side supports 100 includes a support rod 1, a bottom support rod 2, and an adjustment assembly 3. The support rod 1 extends obliquely in a vertical direction, and the bottom support rod 2 extends in a second direction, which is perpendicular to the first direction. One end of the bottom support rod 2 is rotatably connected to the lower part of the support rod 1 around a first rotation center line X1. The adjustment assembly 3 includes a first adjustment member 31 and a second adjustment member 32 that are interconnected and each extends vertically. The upper part of the first adjustment member 31 is rotatably connected to the support rod 1 around a second rotation center line X2, and the lower part of the second adjustment member 32 is rotatably connected to the bottom support rod 2 around a third rotation center line X3. The first adjustment member 31 and the second adjustment member 32 are configured to move away from or closer to each other and adjust the height of the second rotation center line, thereby adjusting the height of the support rod 1. The first rotation center line X1, the second rotation center line X2, and the third rotation center line X3 are parallel to each other and extend along the first direction.

[0039] By adjusting the first adjusting member 31 and the second adjusting member 32, the height of the second rotation center line X2 changes, thereby changing the angle between the support rod 1 and the bottom support rod 2. The folding chair has a sitting structure for the user to sit on, which is usually located between the two support rods 1. By changing the angle between the support rod 1 and the bottom support rod 2, the height of the sitting structure also changes, thus achieving adjustment of the user's sitting height.

[0040] In this embodiment, the bottom support rod 2 includes a first bottom rod 21 and a second bottom rod 22 that extend along a second direction and are slidably disposed along their length. One end of the first bottom rod 21 is rotatably connected to the lower part of the support rod 1 around a first rotation center line X1, and the lower part of the second adjusting member 32 is rotatably connected to the second bottom rod 22 around a third rotation center line X3. The folding chair also has a folded state. During the folding process, the support rod 1 retracts downward relative to the bottom support rod 2. Driven by the support rod 1, the adjusting member 3 also retracts relative to the bottom support rod 2. The adjusting member 3 can drive the second bottom rod 22 to slide relative to the first bottom rod 21 and shorten the length of the bottom support rod 2. In the folded state, the first bottom rod 21 and the second bottom rod 22 slide and fold, the support rod 1 and the bottom support rod 2 fold relative to each other, and the adjusting member 3 folds between the support rod 1 and the bottom support rod 2. In this state, the volume of the folding chair is reduced, making it easy to store and organize.

[0041] In this embodiment, the first adjusting member 31 and the second adjusting member 32 are rotatably connected, and they fold together by relative rotation, thereby adjusting the height of the folding chair. Specifically, the lower part of the first adjusting member 31 and the upper part of the second adjusting member 32 are rotatably connected around the fourth rotation center line X4, which also extends along the first direction. In the unfolded state, the support rod 1, the bottom support rod 2, the first adjusting member 31, and the second adjusting member 32 form a four-bar linkage mechanism. The height of the sitting structure can be adjusted by converting the four-bar linkage mechanism.

[0042] In this embodiment, when the first adjusting member 31 and the second adjusting member 32 are unfolded relative to each other, the second rotation center line X2 has a first height, the support rod 1 and the bottom support rod 2 have a first included angle, and the first adjusting member 31 and the second adjusting member 32 have a second included angle. When the first adjusting member 31 and the second adjusting member 32 are folded relative to each other, the support rod 1 and the bottom support rod 2 have a third included angle, and the first adjusting member 31 and the second adjusting member 32 have a fourth included angle. The third included angle is smaller than the first included angle, the fourth included angle is smaller than the second included angle, and the second rotation center line X2 is at a second height lower than the first height.

[0043] To clearly describe the relative positional relationship between the various components of the folding chair, a coordinate system is established based on the orientation observed by the user when sitting on the folding chair, to define directions such as up, down, left, right, front, and back. The first direction is the left-right direction, and the second direction is the front-back direction. Two sets of side supports 100 are respectively located on the left and right sides. The bottom support rod 2 extends along the front-back direction. In the unfolded state, the support rod 1 extends backward from bottom to top. The front part of the first bottom rod 21 is rotatably connected to the lower end of the support rod 1 around the first rotation center line X1.

[0044] See Figures 1 to 3 As shown, in this embodiment, the folding chair has three states, and the seating structure also has three adjustable heights. When the folding chair is in the first state, the first adjusting member 31 and the second adjusting member 32 are unfolded relative to each other, and the seating structure is at its highest height in this state. Driving the first adjusting member 31 and the second adjusting member 32 to rotate relative to each other causes the first adjusting member 31 to rotate the support rod 1 downward relative to the bottom support rod 2, reducing the angle between the support rod 1 and the bottom support rod 2, and the folding chair switches to the second state, lowering the height of the seating structure. Continuing to drive the first adjusting member 31 and the second adjusting member 32 to rotate relative to each other causes the support rod 1 to continue folding downward relative to the bottom support rod 2, further reducing the angle between the support rod 1 and the bottom support rod 2, and the folding chair switches to the third state, further lowering the height of the seating structure. In other embodiments, the folding chair has more than three states, and the seating structure has more adjustable height settings.

[0045] In this embodiment, the seating structure is a seat 200 fixed between two support rods 1. The seat 200 forms a seat 201 and a backrest 202, wherein the backrest 202 extends backward at an angle from bottom to top, providing support for the user's back. In this embodiment, the seat 201 extends downward at an angle from front to back, making it more comfortable for the user to sit on. See also Figures 1 to 3 As shown, during the relative folding of the first adjusting member 31 and the second adjusting member 32, the height of the seat 201 and the backrest 202 continuously decreases, and the angle between the seat 201 and the horizontal plane continuously increases, while the angle between the backrest 202 and the horizontal plane continuously decreases, which can provide users with more stable support and a more comfortable experience.

[0046] In this embodiment, the support rod 1 includes a first support rod 11 and a second support rod 12 rotatably connected. In the unfolded state, the first support rod 11 and the second support rod 12 extend backward from bottom to top, respectively. The lower part of the first support rod 11 is rotatably connected to the front part of the first bottom rod 21 around the first rotation center line X1, and the upper part of the first support rod 11 and the lower part of the second support rod 12 are rotatably connected to the upper end of the first adjusting member 31 around the second rotation center line X2. During the folding process of the folding chair, the first support rod 11 and the second support rod 12 rotate and fold around the second rotation center line X2. When the folding chair is in the folded state, the second support rod 12, the first support rod 11, and the bottom support rod 2 are folded together from top to bottom.

[0047] In some preferred embodiments, when the folding chair is in the unfolded state, the second adjusting member 32 extends obliquely from top to bottom toward the first rotation center line X1, that is, it extends obliquely forward from top to bottom. In this way, when the support rod 1 is folded downward, the support rod 1 can better drive the second adjusting member 32 to flip backward and downward. At the same time, the support rod 1 can better drive the second adjusting member 32 to move forward, and make the lower part of the second adjusting member 32 better drive the second bottom rod 22 to retract forward relative to the first bottom rod 21.

[0048] In some preferred embodiments, in the unfolded state, there is an angle between the length extension direction of the first adjusting member 31 and the length extension direction of the second adjusting member 32. This arrangement allows the first adjusting member 31 to more smoothly drive the second adjusting member 32 to flip downwards during folding, driven downwards by the support rod 1. See also [reference needed] in this embodiment. Figure 2 As shown, in the unfolded state, the second adjusting member 32 extends forward at an angle from top to bottom, and the first adjusting member 31 extends backward at an angle from top to bottom.

[0049] In this embodiment, the side support 100 also includes a diagonal brace 4 connected between the adjustment component 3 and the bottom support rod 2. In the unfolded state, the diagonal brace 4 is supported between the adjustment component 3 and the bottom support rod 2, and the second adjustment component 32, the diagonal brace 4, and the bottom support rod 2 form a triangular structure, which can improve the stability of the folding chair in the unfolded state. In the folded state, the diagonal brace 4 is folded between the support rod 1 and the bottom support rod 2.

[0050] In this embodiment, the adjustment component 3 can be adjusted by the diagonal brace 4. Specifically, one of the lower part of the first adjustment member 31 and the upper part of the second adjustment member 32 is rotatably connected to one end of the diagonal brace 4, and the other end of the diagonal brace 4 is connected to the bottom support rod 2. By controlling the diagonal brace 4, the lower part of the first adjustment member 31 or the upper part of the second adjustment member 32 can be driven to move backward, thereby driving the first adjustment member 31 and the second adjustment member 32 to fold relative to each other, thereby adjusting the height of the sitting structure.

[0051] In this embodiment, the diagonal brace 4 includes a first segment 41 and a second segment 42. The lower part of the first adjusting member 31, the upper part of the second adjusting member 32, and one end of the first segment 41 are rotatably connected around a fourth rotation center line X4. One end of the second segment 42 is rotatably connected to the bottom support rod 2, and the other end of the first segment 41 is rotatably connected to the other end of the second segment 42. Specifically, the lower part of the second segment 42 is rotatably connected to the bottom support rod 2 around a fifth rotation center line X5, and the first segment 41 and the second segment 42 are rotatably connected around a sixth rotation center line X6. The fifth rotation center line X5 and the sixth rotation center line X6 are parallel to each other and extend in the left-right direction.

[0052] In the unfolded state, the second adjusting member 32, the bottom support rod 2, the first rod segment 41, and the second rod segment 42 also form a four-bar linkage mechanism. By driving the first rod segment 41 and the second rod segment 42 to rotate relative to each other, the first rod segment 41 can drive the fourth rotation center line X4 to move forward or backward, thereby driving the first adjusting member 31 and the second adjusting member 32 to unfold or fold relative to each other, thus adjusting the height of the folding chair.

[0053] In some embodiments, a locking mechanism is provided between the first rod segment 41 and the second rod segment 42 to lock the two together, so that the state of the folding chair can be locked after the height of the folding chair is adjusted. When adjusting the height of the folding chair, the locking mechanism needs to be switched to the unlocked state.

[0054] In this embodiment, the diagonal brace 4 is rotatably connected to the first base rod 21 around the fifth rotation center line X5. Specifically, the lower part of the second rod segment 42 is rotatably connected to the rear part of the first base rod 21 around the fifth rotation center line X5. Along the length extension direction of the base support rod 2, the third rotation center line X3 is located between the first rotation center line X1 and the fifth rotation center line X5. During the folding process, driven by the support rod 1, the fourth rotation center line X4 moves downward, and the diagonal brace 4 and the second adjusting member 32 unfold relative to each other in the front-back direction. Both the second adjusting member 32 and the diagonal brace 4 fold downward relative to the base support rod 2, and the second adjusting member 32 drives the second base rod 22 to fold forward relative to the first base rod 21. In the folded state, the second adjusting member 32 and the diagonal brace 4 fold sequentially above the second base rod 22 in the front-back direction, and the first adjusting member 31 folds above the diagonal brace 4.

[0055] In this embodiment, when the folding chair is folded, the first rod segment 41 and the second rod segment 42 are in a relatively unfolded state. In some preferred embodiments, there is a plane passing through the fourth rotation center line X4 and the fifth rotation center line X5. When the first rod segment 41 and the second rod segment 42 are unfolded relative to each other, the sixth rotation center line X6 is located in front of this plane. With this arrangement, the diagonal brace 4 can better maintain stability during the process of the diagonal brace 4 and the second adjusting member 32 unfolding relative to each other.

[0056] In this embodiment, the second bottom rod 22 has a hollow cavity extending along its length. The first bottom rod 21 is slidably inserted into the hollow cavity. During folding, the first bottom rod 21 is folded into the hollow cavity of the second bottom rod 22. In this embodiment, in each set of side supports 100, a sliding sleeve is slidably fitted onto the second bottom rod 22. The sliding sleeve has a pin, which is connected to the first bottom rod 21. The lower part of the second rod segment 42 is rotatably connected to the sliding sleeve around the fifth rotation center line X5. Specifically, the second bottom rod 22 has a groove extending in the front-back direction and communicating with the hollow cavity of the second bottom rod 22. In the left-right direction, the groove is located inside the second bottom rod 22. The pin is inserted into the groove and connected to the first bottom rod 21 located in the hollow cavity.

[0057] In this embodiment, the fifth rotation center line X5 and the third rotation center line X3 are in the same horizontal plane. With this arrangement, during the folding process, the second adjusting member 32 and the diagonal brace 4 can unfold more smoothly in the front and back direction, and drive the first bottom rod 21 and the second bottom rod 22 to slide and fold more smoothly.

[0058] In this embodiment, the folding chair also includes a cross brace assembly connected between the two side supports 100 and capable of being folded along the first direction. When the folding chair is in the folded state, the cross brace assembly is folded along the first direction, and the two side supports 100 are relatively retracted along the first direction, thereby reducing the size of the folding chair in the left and right directions after folding, making the folding chair more convenient to move or store.

[0059] In this embodiment, see Figure 1 As shown, the cross bracing assembly includes a cross brace 5 disposed between the two bottom support rods 2. The cross brace 5 includes two bottom support rods 51 that intersect each other and are rotatably connected at the intersection. One end of each bottom support rod 51 is directly or indirectly rotatably connected to the first bottom rod 21, and the other end of each bottom support rod 51 is directly or indirectly rotatably connected to the second bottom rod 22. This configuration allows for linkage between the folding of the bottom support rod 2 in the front-to-back direction and the folding in the left-to-right direction, enabling simultaneous folding of the side supports 100 on both sides during the front-to-back folding process, simplifying the folding operation. In this embodiment, one end of each bottom support rod 51 is rotatably connected to the lower part of the second adjusting member 32, thereby achieving a rotatable connection with the second bottom rod 22. The other end of each bottom support rod 51 is rotatably connected to the lower part of the diagonal support rod 4, thereby achieving a rotatable connection with the first bottom rod 21. During the sliding and folding process of the second bottom rod 22 relative to the first bottom rod 21, the distance between the lower part of the second adjusting member 32 and the lower part of the diagonal support rod 4 continuously increases in the front-back direction, driving the two bottom support rods 51 to fold in the left-right direction.

[0060] In this embodiment, the cross bracing assembly further includes an upper support frame disposed between the upper parts of the two support rods 1 and a lower support frame disposed between the lower parts of the two support rods 1, for maintaining the stability between the two sets of side supports 100 together with the cross support frame 5 in the unfolded state. In this embodiment, the upper support frame includes two upper support rods 61 rotatably connected, and the lower support frame includes two lower support rods 71 ​​rotatably connected. In the unfolded state, both the upper and lower support frames extend in the left-right direction. In the folded state, the two upper support rods 61 rotate and fold, and the two lower support rods 71 ​​rotate and fold, and both the two upper support rods 61 and the two lower support rods 71 ​​are folded between the two support rods 1. Specifically, in the unfolded state, one end of each of the two upper support rods 61 is rotatably connected to the upper end of the second support rod 12 on the same side, and the other end of each of the two upper support rods 61 is rotatably connected. The first end of each of the two lower support rods 71 ​​is rotatably connected to the lower part of the first support rod 11 on the same side, and the other end of each of the two lower support rods 71 ​​is directly or indirectly rotatably connected.

[0061] In some preferred embodiments, a locking structure is provided at the connection point of the two upper support rods 61. In the unfolded state, this locking structure can lock the two upper support rods 61, preventing them from folding relative to each other, and also preventing the side supports 100 on both sides from folding relative to each other. Since the folding of the bottom support rod 2 is linked to the folding of the cross support frame 5, when either one is restricted from folding, the other cannot fold either. Therefore, when the two sets of side supports 100 cannot fold in the left-right direction, the bottom support rod 2 cannot fold in the front-back direction, and the vertical folding of the folding chair is also restricted. Therefore, when the two upper support rods 61 are locked by the locking structure, the folding chair can remain in the unfolded state. Only by releasing the lock on the two upper support rods 61 can the folding chair be folded.

[0062] See Figures 1 to 4 As shown, in the unfolded state, the first support rod 11 and the second support rod 12 extend along the same length direction, the first bottom rod 21 and the second bottom rod 22 unfold relative to each other along the length direction, the adjusting component 3 and the diagonal brace 4 are located between the support rod 1 and the bottom support rod 2, and provide stable support for the support rod 1, while the cross brace component unfolds in the left-right direction. In this state, the height of the sitting structure located between the two support rods 1 can be adjusted by controlling the diagonal brace 4 to drive the first adjusting member 31 and the second adjusting member 32 to unfold or fold relative to each other. In this embodiment, the distance between the opposite ends of the diagonal brace 4 is changed by driving the first rod segment 41 and the second rod segment 42 to rotate and fold or open, thereby driving the rotational connection of the first adjusting member 31 and the second adjusting member 32 to shift, thus changing the state of the adjusting component 3. In other embodiments, the diagonal brace 4 can also adopt other structures that can change the distance between its opposite ends.

[0063] In some preferred embodiments, the first adjusting member 31 is a buffer member capable of extending and retracting along its own length. Specifically, the first adjusting member 31 includes a first connecting part and a second connecting part that are slidably connected along its length. The first connecting part is rotatably connected to the support rod, and the second connecting part is connected to the second adjusting member. Specifically, the upper part of the first connecting part, the first support rod 11, and the second support rod 12 are rotatably connected around the second rotation center line X2, and the lower part of the second connecting part, the second adjusting member 32, and the first rod segment 41 are rotatably connected around the fourth rotation center line X4. An elastic member is provided between the first connecting part and the second connecting part to provide a force for the relative unfolding of the first connecting part and the second connecting part. With this arrangement, the elastic member can play a shock-absorbing role. At the same time, as the user sitting on the folding chair moves, the first connecting part and the second connecting part slide and extend or slide and unfold, causing the support rod 1 to swing around the first rotation center line X1, making the folding chair a rocking chair that can rock up and down, increasing the fun of use.

[0064] When folding the chair, see Figures 5 to 8 As shown, firstly, release the locking of the two upper support rods 61, and push downwards the rotating connection of the two upper support rods 61 so that the side supports 100 on both sides can be folded relative to each other, and so that the two upper support rods 61 fold downwards relative to each other and fold relative to the first support rod 11 on the same side. Flip the first support rod 11 forward so that it folds relative to the upper part of the second support rod 12. After the first support rod 11 and the second support rod 12 are folded together, press down the support rod 1. Alternatively, during the flipping of the first support rod 11, a downward force can be applied to the first support rod 11 at the same time, so that it and the second support rod 12 move downwards. During the downward pressing process, the support rod 1 drives the first adjusting member 31 to move downward, the first adjusting member 31 drives the second adjusting member 32 and the diagonal brace 4 to unfold relative to each other in the front-back direction, the second adjusting member 32 drives the second bottom rod 22 to fold forward relative to the first bottom rod 21, during this process, the cross support frame 5 also folds in the left-right direction, under the drive of the cross support frame 5, the two sets of side supports 100 fold in the left-right direction, the lower support frame also folds in the left-right direction, and the upper support frame also continues to fold.

[0065] In folded state, see Figure 9 , Figure 10 As shown, the second support rod 12, the first support rod 11, and the bottom support rod 2 are folded together from top to bottom. The adjusting component 3 and the diagonal brace 4 are folded between the first support rod 11 and the bottom support rod 2. The first adjusting component 31 and the second adjusting component 32 are in a relatively unfolded state, and the first rod segment 41 and the second rod segment 42 are also in a relatively unfolded state. In this state, the folding chair is not only folded together in the vertical and horizontal directions as well as the front and back directions, but the two sets of side supports 100 are also folded together in the horizontal direction, greatly reducing the size of the folding chair and making it easier to store and organize.

[0066] Example 2

[0067] See Figures 11 to 13 As shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, there is no diagonal brace 4 between the adjusting component 3 and the bottom support rod 2. The user directly drives the rotating connection between the first adjusting member 31 and the second adjusting member 32 to move back and forth, thereby causing the first adjusting member 31 and the second adjusting member 32 to fold or unfold, and thus adjust the height of the folding chair. Specifically, a locking mechanism can be set at the rotating connection between the first adjusting member 31 and the second adjusting member 32 to lock the folding chair after height adjustment.

[0068] In this embodiment, one end of the bottom support rod 51 constituting the cross support frame 5 is rotatably connected to a second end on one side, and the other end of the bottom support rod 51 is rotatably connected to the rear of the first bottom rod 21 on the other side. Along the length of the bottom support rod 2, the connection point between the bottom support rod 51 and the second end is located in front of the connection point between the bottom support rod 51 and the first bottom rod 21. Thus, during the sliding folding process of the first bottom rod 21 and the second bottom rod 22, the cross support frame 5 can also achieve linkage folding.

[0069] Example 3

[0070] Without illustration, the difference between this embodiment and embodiment 2 is that in this embodiment, the first adjusting member 31 and the second adjusting member 32 are slidably and telescopically arranged along the length direction. In the unfolded state, driving the first adjusting member 31 and the second adjusting member 32 to slide and fold along the length direction can shorten the distance between the first end and the second end, thereby adjusting the height.

[0071] Example 4

[0072] The difference between this embodiment and embodiment 1 is that in this embodiment, the bottom support rod 2 does not include the first bottom rod 21 and the second bottom rod 22. The lower part of the second adjusting member 32 is slidably connected to the bottom support rod 2. When the folding chair is in the folded state, the lower part of the second adjusting member 32 moves closer to the first rotation center line X1, so that the adjusting component 3 retracts relative to the bottom support rod 2.

[0073] In this embodiment, the second rod segment 42 is rotatably connected to the bottom support rod 2 around the fifth rotation center line X5. During the folding process, the second adjusting member 32 slides along the bottom support rod 2 and moves away from the second rod segment. The folding chair is in the folded state, and the diagonal support rod 4 and the second adjusting member 32 unfold relative to each other in the second direction.

[0074] In this embodiment, one end of the bottom support rod 51 constituting the cross support frame 5 is rotatably connected to the lower part of the second adjusting member 32 on one side, and the other end of the bottom support rod 51 is rotatably connected to the bottom support rod 2 on the other side. During the folding process, when the second adjusting member 32 slides along the bottom support rod 2, the second adjusting member 32 also drives the cross support frame 5 to fold.

[0075] Example 5

[0076] The difference between this embodiment and embodiment 4 is that in this embodiment, the second rod segment 42 is also slidably connected to the bottom support rod 2. During the folding process, both the second adjusting member 32 and the second rod segment 42 slide along the bottom support rod 2, and the second adjusting member 32 and the second rod segment 42 are relatively far apart.

[0077] In this embodiment, one end of the bottom support rod 51 constituting the cross support frame 5 is rotatably connected to the lower part of the second adjusting member 32 on one side or to the lower part of the second rod segment 42, and the other end of the bottom support rod 51 is rotatably connected to the bottom support rod 2 on the other side. Alternatively, one end of the bottom support rod 51 is rotatably connected to the lower part of the second adjusting member 32 on one side, and the other end of the bottom support rod 51 is rotatably connected to the lower part of the second rod segment 42 on the other side.

[0078] Example 6

[0079] The difference between this embodiment and embodiment 4 is that in this embodiment, the lower part of the second adjusting member 32 is rotatably connected to the bottom support rod 2. During the folding process of the folding chair, the first adjusting member 31 and the second adjusting member 32 rotate and fold around the fourth rotation center line X4, thereby folding between the support rod 1 and the bottom support rod 2. In this embodiment, the second rod segment 42 is slidably connected to the bottom support rod 2. During the folding process, the second rod segment 42 slides along the bottom support rod 2 and moves away from the second adjusting member 32.

[0080] In this embodiment, one end of the bottom support rod 51 constituting the cross support frame 5 is rotatably connected to the lower part of the second rod segment 42 on one side, and the other end of the bottom support rod 51 is rotatably connected to the bottom support rod 2 on the other side.

[0081] In summary, in all the above embodiments, the folding chair, by incorporating a first adjusting member 31 and a second adjusting member 32 that can be folded relative to each other, achieves height adjustment in the unfolded state, thereby adjusting the user's sitting posture and enriching the usage modes of the folding chair. Simultaneously, the folding chair also features a horizontal support assembly that can fold in the left-right direction. The adjusting component 3 or the diagonal support rod 4 can function in a linkage manner. During the vertical folding of the folding chair, the adjusting component 3 or the diagonal support rod 4 can drive the cross support frame 5 to fold in the left-right direction. During the downward folding of the support rod 1, the adjusting component 3 or the diagonal support rod 4 drives the horizontal support assembly to fold, causing the two sets of side supports 100 on both sides to fold relative to each other in the left-right direction, simplifying the folding operation. The folding chair occupies little space in the folded state, making it easy to store and organize.

[0082] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A folding chair, characterized in that: Includes two sets of side supports disposed on both sides along a first direction. In the unfolded state, each set of side supports includes: The support rod extends at an angle in the vertical direction; A bottom support rod extends along a second direction, which is perpendicular to the first direction. One end of the bottom support rod is rotatably connected to the lower part of the support rod around a first rotation center line. The adjustment assembly includes a first adjustment member and a second adjustment member that are interconnected and extend vertically. The upper part of the first adjustment member is rotatably connected to the support rod about a second rotation center line, and the lower part of the second adjustment member is rotatably connected to the bottom support rod about a third rotation center line. The first and second adjustment members are configured to move relatively closer to or further away from each other to adjust the height of the support rod. The first, second, and third rotation center lines are parallel to each other and extend along the first direction.

2. The folding chair according to claim 1, characterized in that: In the unfolded state, the lower part of the first adjusting member and the upper part of the second adjusting member are rotatably connected around a fourth rotation center line, which extends along the first direction. The support rod, the bottom support rod, the first adjusting member, and the second adjusting member constitute a four-bar linkage mechanism.

3. The folding chair according to claim 2, characterized in that: In the unfolded state, the second adjusting member extends obliquely from top to bottom toward the first rotation center line; And / or, in the unfolded state, there is an angle between the length extension direction of the first adjusting member and the length extension direction of the second adjusting member; And / or, the lower part of the second adjusting member is slidably and rotatably connected to the bottom support rod, and when the folding chair is in the folded state, the lower part of the second adjusting member is close to the first rotation center line.

4. The folding chair according to claim 2, characterized in that: The side support also includes a diagonal brace, one of the lower part of the first adjusting member and the upper part of the second adjusting member being rotatably connected to one end of the diagonal brace, and the other end of the diagonal brace being connected to the bottom support.

5. The folding chair according to claim 4, characterized in that: The diagonal brace includes a first segment and a second segment that are rotatably connected. The lower part of the first adjusting member, the upper part of the second adjusting member, and the first segment are rotatably connected around the fourth rotation center line. The second segment is rotatably connected to the bottom support rod. The second adjusting member, the bottom support rod, the first segment, and the second segment constitute a four-bar linkage.

6. The folding chair according to claim 5, characterized in that: The second rod segment is rotatably connected to the bottom support rod around the fifth rotation center line. Along the length extension direction of the bottom support rod, the third rotation center line is located between the first rotation center line and the fifth rotation center line. At least one of the second adjusting member and the second rod segment is slidably rotatably connected to the bottom support rod. When the folding chair is in the folded state, the diagonal brace and the second adjusting member are unfolded relative to each other along the second direction, and the diagonal brace and the second adjusting member are folded up above the bottom support rod.

7. The folding chair according to claim 1, characterized in that: The folding chair also includes a cross brace assembly connected between the two side supports and capable of folding along the first direction. When the folding chair is in the folded state, the cross brace assembly folds along the first direction, and the two side supports are retracted along the first direction.

8. The folding chair according to claim 7, characterized in that: The bottom support rod includes a first bottom rod and a second bottom rod that extend along a second direction and are slidably arranged along the length direction. One end of the first bottom rod is rotatably connected to the lower part of the support rod around a first rotation center line, and the lower part of the second adjusting member is rotatably connected to the second bottom rod around a third rotation center line. The lower part of the second adjusting member is rotatably connected to the second base rod around the third rotation center line. When the folding chair is in the folded state, the support rod and the bottom support rod are folded relative to each other, the first base rod and the second base rod are slidably folded, and the adjusting component is folded between the support rod and the bottom support rod. The cross bracing assembly includes a cross bracing frame disposed between the two bottom support rods. The cross bracing frame includes two bottom support rods that cross each other and are rotatably connected at the intersection. One end of each bottom support rod is directly or indirectly rotatably connected to the first bottom support rod, and the other end of each bottom support rod is directly or indirectly rotatably connected to the second bottom support rod. The side support also includes diagonal braces. In the unfolded state, the upper part of the diagonal brace is rotatably connected to the adjustment assembly, the lower part of the diagonal brace is connected to the first bottom rod, one end of each bottom support rod is rotatably connected to the lower part of the second adjustment member on one side, and the other end of the bottom support rod is rotatably connected to the lower part of the diagonal brace on the other side.

9. The folding chair according to claim 1, characterized in that: The first adjusting member and the second adjusting member are slidably extended and retracted along the length direction.

10. The folding chair according to any one of claims 1 to 9, characterized in that: The first adjusting member includes a first connecting part and a second connecting part that are slidably connected along the length direction. The first connecting part is rotatably connected to the support rod, and the second connecting part is connected to the second adjusting member. An elastic element is provided between the first connecting part and the second connecting part, and the elastic element is configured to provide a force for the relative unfolding of the first connecting part and the second connecting part.

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