Foldable seat

Abstract

The utility model discloses a foldable seat which comprises two sets of side supports arranged on the two sides respectively, each side support comprises a bearing rod, a bottom supporting rod, a supporting rod and a linkage rod, and in the unfolded state, the bearing rods obliquely extend in the vertical direction; the bottom supporting rod comprises a first bottom rod and a second bottom rod which are arranged in a sliding mode in the length direction, and the first bottom rod is rotationally connected with the lower portion of the bearing rod; the supporting rod is rotationally connected between the bearing rod and the second bottom rod; one end part of the linkage rod is rotatably connected with the bearing rod or the first bottom rod, the other end part of the linkage rod is rotatably connected with the supporting rod, in a folding state, the bearing rod and the bottom supporting rod are folded relatively, the first bottom rod and the second bottom rod are folded in a sliding manner, the supporting rod and the linkage rod are folded between the bearing rod and the bottom supporting rod, and the linkage rod is folded between the bearing rod and the bottom supporting rod. When the bearing rods are unfolded or folded relative to the bottom supporting rods, the supporting rods can be in linkage to enable the bottom supporting rods to be unfolded or folded, and the foldable seat is easy to fold or unfold.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of foldable seats. BACKGROUND

[0002] In prior art, part of seat can be folded, to reduce the volume of seat, to provide convenience for carrying and storage, but the folding principle of most seats is complex, folding operation is tedious, which brings great inconvenience to users. UTILITY MODEL CONTENT

[0003] The utility model aims at providing a kind of foldable seats.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of: a kind of foldable seats, including two groups of side supports being separately arranged in two sides along the first direction, in unfolded state, the side support includes:

[0005] The load bar extends obliquely along the up-down direction;

[0006] The bottom support rod includes the first bottom rod and the second bottom rod extending along the second direction respectively, the first direction and the second direction are perpendicular to each other, the first bottom rod and the second bottom rod are arranged along the length direction slidingly, the first bottom rod has the first side and the second side being separately arranged on the different sides of its length direction, the first side is rotatably connected with the lower part of the load bar;

[0007] The support rod extends along the up-down direction, the upper part of the support rod is rotatably connected with the load bar, and the lower part of the support rod is rotatably connected with the second bottom rod;

[0008] The linkage rod has the first end and the second end being separately arranged on the different ends of its length direction, the first end is rotatably connected with the lower part of the load bar, or the first end is rotatably connected with the first side, and the second end is rotatably connected with the support rod,

[0009] In folded state, the load bar and the bottom support rod are relatively close, the first bottom rod and the second bottom rod are folded by sliding, and the support rod and the linkage rod are folded between the load bar and the bottom support rod.

[0010] In some embodiments, the support rod includes a first support rod and a second support rod extending obliquely in the vertical direction, the upper part of the first support rod and the lower part of the second support rod being rotatably connected about a first rotation center line, and the second support rod having a connecting portion extending downward from the rotation connection point; the first side portion is rotatably connected to the lower part of the first support rod about a second rotation center line, the upper part of the support rod is rotatably connected to the connecting portion about a third rotation center line, and the lower part of the support rod is rotatably connected to the second bottom rod about a fourth rotation center line. The first rotation center line, the second rotation center line, the third rotation center line and the fourth rotation center line are parallel to each other and extend along the first direction. In the unfolded state, along the second direction, the third rotation center line is located between the first rotation center line and the second rotation center line; in the folded state, the fourth rotation center line is close to the second rotation center line, and along the second direction, the first rotation center line is located between the second rotation center line and the third rotation center line.

[0011] In some embodiments, the foldable seat further includes a cross brace connected between the side supports on both sides and capable of being folded along the first direction. When the foldable seat is in a folded state, the cross brace is folded along the first direction, and the side supports on both sides are retracted along the first direction. The cross brace includes a cross brace assembly disposed between the bottom support rods on both sides. The cross brace assembly 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 rod on one side, and the other end of each bottom support rod is directly or indirectly rotatably connected to the second bottom rod on the other side.

[0012] In some embodiments, one end of each bottom support rod is rotatably connected to the lower part of one side of the support rod about a fifth rotation center line, and the other end of the bottom support rod is rotatably connected to the second side of the other side about a sixth rotation center line. The fifth rotation center line and the sixth rotation center line are parallel to each other and extend in the vertical direction. In the unfolded state, along the second direction, the fifth rotation center line is located between the first rotation center line and the sixth rotation center line.

[0013] In some embodiments, in the unfolded state, the support rod extends from top to bottom away from the second rotation center line.

[0014] In some embodiments, the support rod includes a first support rod and a second support rod that are slidably disposed along the length direction. In the unfolded state, the first support rod and the second support rod each extend in the vertical direction. The upper part of the first support rod is rotatably connected to the bearing rod about a third rotation center line, and the lower part of the second support rod is rotatably connected to the second bottom rod about a fourth rotation center line. The third rotation center line and the fourth rotation center line are parallel to each other.

[0015] In some embodiments, the second support rod has a hollow cavity extending along its own length, the first support rod is slidably inserted into the hollow cavity, the first end, the lower part of the bearing rod, and the front part of the first bottom rod are rotatably connected about the same rotation center line, and the second end is rotatably connected to the second support rod; a locking mechanism is provided between the first support rod and the second support rod for locking the two together, and when the locking mechanism is unlocked, the first support rod can slide relative to the second support rod to change the height of the support rod.

[0016] In some embodiments, the locking mechanism includes:

[0017] At least one keyhole is provided on the second support rod, and the keyhole communicates with the hollow cavity.

[0018] A locking element is movably disposed at the lower part of the first support rod and located within the hollow cavity. The locking element has a locking part, which is inserted into the lock hole when the locking mechanism is in the locked state.

[0019] The locking element is an elastic hook, or the locking mechanism further includes a first elastic element configured to provide the force required for the locking part to move toward the keyhole; the second support rod is also movably provided with an unlocking element for driving the locking part to disengage from the keyhole, so that the locking mechanism is switched to an unlocked state.

[0020] In some embodiments, the locking member is provided with a driving structure, which is configured to drive the locking part to disengage from the lock hole during the upward movement of the first support rod relative to the second support rod.

[0021] In some embodiments, the upper part of the locking member is provided with a driving surface, which extends obliquely from top to bottom outward of the hollow cavity, and the driving surface constitutes the driving structure.

[0022] In some embodiments, the first support rod includes a first rod segment and a second rod segment, the upper part of the first rod segment is rotatably connected to the connecting portion about a third rotation center line, the second rod segment is slidably disposed with respect to the first rod segment along the length direction of the first rod segment, and a buffer is provided between the first rod segment and the second rod segment, the buffer being configured to provide a force for the second rod segment to move downward relative to the first rod segment.

[0023] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: When the foldable seat of this utility model is folded close to the bottom support rod, the linkage rod can drive the support rod to rotate, thereby causing the second bottom rod to slide along the first bottom rod, so that the bottom support rod is folded together. Similarly, when the load-bearing rod is relatively far away from the bottom support rod and unfolded relative to the bottom support rod, the support rod can drive the second bottom rod to slide and unfold with the first bottom rod. The linkage between the load-bearing rod and the bottom support rod is realized through the support rod and the linkage rod, which simplifies the folding and unfolding operation of the seat and brings convenience to the user. Attached Figure Description

[0024] Appendix Figure 1 This is a three-dimensional structural diagram of the foldable seat in the unfolded state according to Embodiment 1 of this utility model.

[0025] Appendix Figure 2 For the appendix Figure 1 A side view showing the foldable seat in the first mode;

[0026] Appendix Figure 3 For the appendix Figure 2 A schematic diagram of the second mode;

[0027] Appendix Figure 4 For the attached Figure 3 Schematic sectional view along the middle AA direction;

[0028] Appendix Figure 5 For the appendix Figure 4 Enlarged view of point B in the middle;

[0029] Appendix Figure 6 For the appendix Figure 2 A schematic diagram of the third mode;

[0030] Appendix Figure 7 This is a schematic diagram of the first step of the folding process of the foldable seat in this embodiment;

[0031] Appendix Figure 8 This is a schematic diagram of the second step of the folding process of the foldable seat in this embodiment;

[0032] Appendix Figure 9 This is a schematic diagram of the third step of the folding process of the foldable seat in this embodiment;

[0033] Appendix Figure 10 This is a side view of the foldable seat in the folded state according to this embodiment;

[0034] Appendix Figure 11 For the appendix Figure 10 Top view;

[0035] The components are as follows: 1. Bearing rod; 11. First bearing rod; 12. Second bearing rod; 121. Connecting part; 2. Bottom support rod; 21. First bottom rod; 211. Sliding sleeve; 22. Second bottom rod; 3. Support rod; 31. First support rod; 311. First rod segment; 3111. Rod cavity; 312. Second rod segment; 313. Buffer; 32. Second support rod; 321. Hollow cavity; 4. Linkage rod; 5. Cross support assembly; 51. Bottom support rod; 60. Fixed seat; 61. Locking hole; 62. Locking element; 621. Locking part; 622. Driving surface; 63. First elastic element; 64. Rotating shaft; 65. Unlocking element; 651. Pressing part; 652. Driving part; 71. Upper support rod; 81. First lower support rod; 82. Second 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] See Figures 1 to 3 A foldable seat is shown, comprising two sets of side supports disposed on both sides along a first direction. Each side support includes a load-bearing rod 1, a bottom support rod 2, a support rod 3, and a linkage rod 4. In the unfolded state, the load-bearing rod 1 extends obliquely in the vertical direction. The bottom support rod 2 includes a first bottom rod 21 and a second bottom rod 22 extending along a second direction, perpendicular to each other. The first bottom rod 21 and the second bottom rod 22 are slidably disposed along their length. The first bottom rod 21 has a first side portion and a second side portion disposed on opposite sides along its length direction, with the first side portion rotatably connected to the lower part of the load-bearing rod 1. The support rod 3 extends in the vertical direction, with its upper part rotatably connected to the load-bearing rod 1 and its lower part rotatably connected to the second bottom rod 22. The linkage rod 4 has a first end portion and a second end portion disposed at opposite ends along its length direction. The first end portion is rotatably connected to the lower part of the load-bearing rod 1, or the first end portion is rotatably connected to the first side portion, and the second end portion is rotatably connected to the support rod 3.

[0038] In the unfolded state, the support rod 1, bottom support rod 2, and support rod 3 form a triangular structure, ensuring the stability of the foldable seat. The linkage rod 4 further enhances the stability of the triangular structure, thereby improving the overall stability of the foldable seat. As the support rod 1 moves closer to or further away from the bottom support rod 2, the linkage rod 4 drives the support rod 3 to rotate, causing the second bottom rod 22 to automatically slide along the first bottom rod 21. In other words, by rotating the support rod 1 relative to the bottom support rod 2, the base support can be automatically folded or unfolded, thus completing the folding or unfolding of the seat and improving the smoothness and convenience of operation.

[0039] When the foldable seat is in the folded state, the support rod 1 and the bottom support rod 2 are folded relative to each other, the first bottom rod 21 and the second bottom rod 22 slide and fold, and the support rod 3 and the linkage rod 4 are folded between the support rod 1 and the bottom support rod 2. After folding, the volume of the seat is greatly reduced, making it easy to store and organize.

[0040] In some embodiments, the support rod 1 cannot be folded, and the support rod 1 or the bottom support rod 2 determines the size of the foldable seat in the second direction after folding. In other embodiments, the support rod 1 can slide and extend along its length, thereby reducing the size of the foldable seat in the second direction after folding.

[0041] In this embodiment, the support rod 1 includes a first support rod 11 and a second support rod 12 extending obliquely in the vertical direction. The upper part of the first support rod 11 is rotatably connected to the lower part of the second support rod 12. The second support rod 12 has a connecting portion 121 extending downward from the rotatable connection point. A first side portion is rotatably connected to the lower part of the first support rod 11. The upper part of the support rod 3 is rotatably connected to the connecting portion 121. Specifically, see [link to documentation]. Figure 1 As shown, the first bearing rod 11 and the second bearing rod 12 are rotatably connected around the first rotation center line X1. The first side of the first bottom rod 21 is rotatably connected to the lower part of the first bearing rod 11 around the second rotation center line X2. The upper part of the support rod 3 is rotatably connected to the connecting part 121 around the third rotation center line X3. The lower part of the support rod 3 is rotatably connected to the second bottom rod 22 around the fourth rotation center line X4. The first rotation center line X1, the second rotation center line X2, the third rotation center line X3 and the fourth rotation center line X4 are parallel to each other and extend along the first direction.

[0042] In this embodiment, when the first support rod 11 rotates and folds relative to the second support rod 12, driven by the connecting part 121 and in cooperation with the linkage rod 4, the support rod 3 flips over with its rotational connection point with the linkage rod 4 as the fulcrum. The lower part of the support rod 3 drives the second bottom rod 22 to slide and fold relative to the first bottom rod 21. At the same time, during the folding process, the support rod 1 folds downward relative to the bottom support rod 2. During this process, the support rod 1 continues to drive the support rod 3 to flip, and the support rod 3 continues to drive the second bottom rod 22 and the first bottom rod 21 to fold. Through the support rod 3 and the linkage rod 4, the folding of the support rod 1 can be linked to the folding of the bottom support rod 2, realizing the linkage between the vertical and horizontal folding and the front-back folding, simplifying the folding operation.

[0043] To clearly describe the relative positional relationship between the various rods of the foldable seat, a coordinate system is established based on the orientation observed by the user when sitting on the foldable seat, 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 are respectively located on the left and right sides, and the bottom support rod 2 extends along the front-back direction. The first side is the front part of the first bottom rod 21, and the second side is the rear part of the first bottom rod 21.

[0044] In the unfolded state, the first support rod 11 and the second support rod 12 extend backward at an upward angle from bottom to top, respectively. The connecting portions 121 on both sides are located between the first support rods 11 on both sides, and the extending direction of the connecting portions 121 is parallel or collinear with the extending direction of the first support rods 11. The front part of the first bottom rod 21 is rotatably connected to the lower end of the first support rod 11 around the second rotation center line X2. (See also...) Figure 1 As shown, in this state, the third rotation center line X3 is located between the first rotation center line X1 and the second rotation center line X2 in both the up-down direction and the front-back direction.

[0045] See Figure 8 , Figure 9 As shown, during the folding process, the connecting part 121 drives the upper part of the support rod 3 to move backward. Under the constraint of the linkage rod 4, the support rod 3 flips over, and the lower part of the support rod 3 moves forward, thereby driving the second bottom rod 22 to slide forward and fold relative to the first bottom rod 21. During the folding process, the bearing rod 1 folds downward relative to the bottom support rod 2, and the bearing rod 1 drives the support rod 3 to fold downward, and the support rod 3 further drives the second bottom rod 22 to slide forward.

[0046] In the folded state, the fourth rotation center line X4 is closer to the second rotation center line X2, and the connecting part 121 is moved to the rear of the first bearing rod 11. In the front-back direction, the first rotation center line X1 is located between the second rotation center line X2 and the third rotation center line X3.

[0047] In this embodiment, the foldable seat also includes a cross brace connected between the side supports on both sides and capable of being folded in a first direction. When the foldable seat is in a folded state, the cross brace is folded in the first direction, and the side supports on both sides are folded together in the first direction, thereby reducing the size of the foldable seat in the left and right directions.

[0048] In this embodiment, the cross support frame includes a cross support assembly 5 disposed between the two bottom support rods 2. The cross support assembly 5 includes two bottom support rods 51 that cross 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 on one side, and the other end of each bottom support rod 51 is directly or indirectly rotatably connected to the second bottom rod 22 on the other side. Thus, during the sliding folding process of the first bottom rod 21 and the second bottom rod 22, the cross support assembly 5 will fold, thereby driving the side supports on the left and right sides to fold, realizing the linkage of folding in the front-back direction and the left-right direction, simplifying the folding operation.

[0049] In this embodiment, one end of each bottom support rod 51 is rotatably connected to the lower part of the support rod 3 on one side around the fifth rotation center line X5, and the other end of the bottom support rod 51 is rotatably connected to the rear part of the first bottom rod 21 on the other side around the 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 vertical direction. In the unfolded state, the fifth rotation center line X5 is located between the first rotation center line X1 and the sixth rotation center line X6 in the front-back direction. Thus, during folding, as the lower part of the support rod 3 drives the second bottom rod 22 to slide forward, the lower part of the support rod 3 simultaneously drives one end of the bottom support rod 51 to move forward, thereby driving the cross support assembly 5 to fold.

[0050] In this embodiment, in the unfolded state, the support rod 3 extends from top to bottom away from the second rotation center line X2. Specifically, see [link to relevant documentation]. Figure 2 As shown, the support rod 3 extends backward at an angle from top to bottom, thus providing more stable support for the bearing rod 1. In this embodiment, during the rotation and folding of the second bearing rod 12 relative to the first bearing rod 11, the support rod 3 changes to extending forward at an angle from top to bottom. Thus, when the bearing rod 1 folds downward relative to the bottom support rod 2, the bearing rod 1 can more easily drive the lower support rod 3 to fold downward relative to the bottom support rod 2, and the lower part of the support rod 3 can also more smoothly drive the second bottom rod 22 to slide forward.

[0051] In this embodiment, the support rod 3 can be folded along its length. By driving the connecting part 121 to move up and down, the bearing rod 1 is flipped up and down, changing the angle between the bearing rod 1 and the bottom support rod 2, thereby changing the height of the bearing rod 1 and thus changing the height of the foldable seat. Specifically, the support rod 3 includes a first support rod 31 and a second support rod 32 that are slidably arranged along its length. In the unfolded state, the first support rod 31 and the second support rod 32 each extend in the vertical direction. The upper part of the first support rod 31 is rotatably connected to the bearing rod. Specifically, the upper part of the first support rod 31 is rotatably connected to the connecting part 121 around the third rotation center line X3, and the lower part of the second support rod 32 is rotatably connected to the second bottom rod 22 around the fourth rotation center line X4. By driving the first support rod 31 and the second support rod 32 to slide and fold or unfold, the height of the foldable seat can be adjusted, enriching the usage modes of the foldable seat.

[0052] In this embodiment, see Figure 4 As shown, the second support rod 32 has a hollow cavity 321 extending along its length. The first support rod 31 is slidably inserted into the hollow cavity 321, thereby achieving a sliding connection between the first support rod 31 and the second support rod 32. See also Figure 1 As shown, the first end of the linkage rod 4, the lower part of the first supporting rod 11, and the front part of the first bottom rod 21 are rotatably connected around the second rotation center line X2. The second end of the linkage rod 4 is rotatably connected to the second support rod 32 around the seventh rotation center line X7, which also extends in the left-right direction. During folding, the support rod 3 flips around the seventh rotation center line. In some embodiments, the first support rod 31 has a hollow cavity extending along its own length direction, and the second support rod 32 is slidably inserted into the cavity of the first support rod 31. The second end of the linkage rod 4 is rotatably connected to the first support rod 31.

[0053] In this embodiment, a locking mechanism is provided between the first support rod 31 and the second support rod 32 to lock them together. When the locking mechanism is locked, the foldable seat remains stable. When the locking mechanism is unlocked, the first support rod 31 can slide relative to the second support rod 32, changing the height of the support rod 3, thereby changing the height of the load-bearing rod 1. Specifically, the locking mechanism includes a locking member 62 and at least one lock hole 61, wherein the lock hole 61 is disposed on the second support rod 32, and the locking member 62 is movably disposed at the lower part of the first support rod 31 and located within the hollow cavity 321. See also Figure 5 As shown, the lock hole 61 is connected to the hollow cavity 321, and the locking member 62 has a locking part 621. When the locking mechanism is in the locked state, the locking part 621 is inserted into the lock hole 61, and when the locking mechanism is in the unlocked state, the locking part 621 is disengaged from the lock hole 61.

[0054] In some embodiments, the locking member 62 is an elastic locking hook. Under the action of its own elastic force, the locking part 621 automatically moves out of the hollow cavity 321, and when the locking part 621 and the lock hole 61 are aligned with each other, the locking part 621 is automatically inserted into the lock hole 61, thereby achieving locking.

[0055] In this embodiment, the locking mechanism further includes a first elastic element 63, which is disposed between the first support rod 31 and the locking element 62. The first elastic element 63 provides the force required for the locking part 621 to move towards the lock hole 61. When the locking part 621 moves to the lock hole 61, under the force of the first elastic element 63, the locking part 621 can automatically insert into the lock hole 61 and achieve locking. At the same time, under the action of the first elastic element 63, the locking mechanism can remain in the locked state, thereby maintaining the stability of the foldable seat.

[0056] In other embodiments, the locking mechanism includes a lock hole 61 and a locking element 62, wherein the lock hole 61 is disposed on the first support rod 31 and the locking element 62 is disposed on the second support rod 32. In still other embodiments, the locking mechanism employs other existing structures capable of locking the first support rod 31 and the second support rod 32.

[0057] In this embodiment, see Figure 4 , Figure 5 As shown, the locking mechanism includes a fixed base 60 fixed to the lower part of the first support rod 31. The upper part of the locking member 62 is rotatably mounted on the fixed base 60 about a rotating shaft 64. The axis of the rotating shaft 64 extends perpendicularly to the length extension direction of the support rod 3. The locking part 621 is located at the lower part of the locking member 62. The first elastic member 63 is specifically a compression spring, which is located between the fixed base 60 and the lower part of the locking member 62. It is used to drive the locking member 62 to rotate and cause the locking part 621 to move out of the hollow cavity 321.

[0058] In this embodiment, the second support rod 32 is provided with three locking holes 61 spaced apart. The foldable seat has three different modes in its unfolded state, corresponding to three different height settings. Specifically, when the foldable seat is in the first mode, the locking part 621 is inserted into the uppermost locking hole 61, at which time the foldable seat has the highest sitting height. The first support rod 31 and the second support rod 32 slide and fold, so that the locking part 621 is inserted into the middle locking hole 61, and the foldable seat switches to the second mode, with its sitting height reduced. Continuing to drive the first support rod 31 and the second support rod 32 to fold, so that the locking part 621 is inserted into the lowermost locking hole 61, the foldable seat switches to the third mode, with its lowest sitting height. In other embodiments, the second support rod 32 may be provided with two locking holes 61, so that the foldable seat has two switchable modes, or the second support rod 32 may be provided with more than three locking holes 61, so that the foldable seat has more switchable modes and more adjustable heights.

[0059] In this embodiment, the second support rod 32 is provided with an unlocking member 65, which is used to drive the locking part 621 out of the lock hole 61, so that the locking mechanism is converted to an unlocked state, thereby enabling the foldable seat to switch between three modes. Specifically, the unlocking member 65 is movably disposed on the outside of the second support rod 32, and the unlocking member 65 corresponds to the position of the lock hole 61. It includes a pressing part 651 and a driving part 652, wherein the driving part 652 is located on the side of the pressing part 651 closer to the second support rod 32, and the driving part 652 can move into the lock hole 61 along a direction perpendicular to the length of the second support rod 32, thereby driving the locking part 621 inserted in the lock hole 61 to disengage. The pressing part 651 is used to drive the driving part 652 into the lock hole 61. Specifically, the user can unlock the seat by applying a force to the pressing part 651 toward the second support rod 32. In this embodiment, the unlocking member 65 is also provided with a reset structure, which is used to drive the driving member 652 away from the lock hole 61 when the pressing part 651 is released. In this embodiment, three unlocking members 65 are provided, respectively located at the three lock holes 61, and along the left-right direction, the unlocking members 65 are located inside the second support rod 32 to avoid accidental unlocking.

[0060] In this embodiment, the locking member 62 is equipped with a driving structure. This driving structure is configured to drive the locking part 621 out of the locking hole 61 during the upward movement of the first support rod 31 relative to the second support rod 32. Thus, when adjusting the height of the foldable seat, there is no need to operate the unlocking member 65; simply driving the support rod 1 to flip upward relative to the bottom support rod 2 causes the first support rod 31 to move upward relative to the second support rod 32, and the locking mechanism automatically unlocks under the drive of the driving structure. Simultaneously, during the relative unfolding of the first support rod 31 and the second support rod 32, when the locking part 621 moves to the locking hole 61, under the drive of the first elastic member 63, the locking part 621 can automatically insert into the locking hole 61 and form a lock, making it more convenient to adjust the seat height. When lowering the height, the unlocking member 65 is required for unlocking, which meets safety requirements.

[0061] In this embodiment, during the folding of the foldable seat, the support rod 3 needs to be in a relatively unfolded state. By setting a drive structure, it is not necessary to adjust the first support rod 31 and the second support rod 32 before the folding operation to make them unfold relative to each other. During the flipping of the second support rod 12, the connecting part 121 will drive the first support rod 31 to move upward relative to the second support rod 32, automatically driving the support rod 3 to unfold.

[0062] In this embodiment, see Figure 5 As shown, the locking member 62 is provided with a driving surface 622, which extends obliquely outward from top to bottom towards the hollow cavity 321. The driving surface 622 is located on the upper part of the locking member 62, and the driving surface 622 constitutes the driving structure described above. During the process of driving the first support rod 31 to move upward relative to the second support rod 32, the locking member 62 moves upward together with the first support rod 31. During this process, the driving surface 622 slides in cooperation with the wall of the lock hole 61, causing the locking part 621 to move into the hollow cavity 321, compressing the first elastic member 63, thereby causing the locking part 621 to disengage from the lock hole 61.

[0063] In this embodiment, the first support rod 31 includes a first rod segment 311 and a second rod segment 312. The upper part of the first rod segment 311 is rotatably connected to the connecting part 121 around the third rotation center line X3. The second rod segment 312 is slidably disposed with respect to the first rod segment 311 along its length direction. A locking member 62 is disposed at the lower part of the second rod segment 312. A buffer member 313 is provided between the first rod segment 311 and the second rod segment 312, providing a downward force for the second rod segment 312 relative to the first rod segment 311. With this configuration, the first rod segment 311 and the second rod segment 312 can slide and extend along their length direction, allowing the support rod 1 to swing up and down relative to the bottom support rod 2 around the second rotation center line X2. Under the action of the buffer member 313, the swing of the support rod 1 is more gentle, and the support rod 1 has a drive to return to its initial position. Thus, the foldable seat functions as a rocking chair, increasing the enjoyment of use.

[0064] In this embodiment, see Figure 4 As shown, the first rod segment 311 has a rod cavity 3111 extending along its own length direction. The upper part of the second rod segment 312 is slidably inserted into the rod cavity 3111. A buffer member 313 is disposed in the rod cavity 3111, and the buffer member 313 is disposed between the upper cavity wall of the rod cavity 3111 and the upper end of the second rod segment 312. Specifically, the buffer member 313 is a spring.

[0065] In this embodiment, a sliding sleeve 211 is fixedly provided at the rear of the first base rod 21, and the second base rod 22 is slidably inserted into the sliding sleeve 211, thereby realizing a sliding connection between the first base rod 21 and the second base rod 22. (See also...) Figure 1 As shown, one end of the bottom support rod 51 is rotatably connected to the sliding sleeve 211 about the sixth rotation center line X6. In other embodiments, the first bottom rod 21 and the second bottom rod 22 may be slidably connected using other forms in the prior art.

[0066] In this embodiment, the cross brace also includes an upper cross brace assembly disposed between the upper parts of the second support rods 12 on both sides. The upper cross brace assembly includes two upper support rods 71 ​​rotatably connected. One end of the two upper support rods 71 ​​is rotatably connected to the upper part of the second support rod 12 on the same side, and the other end of the two upper support rods 71 ​​is rotatably connected. In the unfolded state, the two upper support rods 71 ​​unfold relative to each other. During the folding process, the two upper support rods 71 ​​fold relative to each other in the left-right direction. In some embodiments, a first locking assembly is provided between the two upper support rods 71 ​​to lock them together, thereby restricting the folding of the side supports on both sides, so that the foldable seat remains in the unfolded state. In some embodiments, a second locking assembly is provided between the first support rod 11 and the second support rod 12 to restrict their relative folding, so that the side supports can remain stable in the unfolded state. In a preferred embodiment, the foldable seat is provided with a first locking assembly and a second locking assembly, and the foldable seat is also provided with an unlocking structure that can unlock both the first locking assembly and the second locking assembly simultaneously.

[0067] In this embodiment, the cross brace also includes a lower cross brace assembly disposed between the lower parts of the first bearing rods 11 on both sides. The lower cross brace assembly includes two first lower support rods 81 that cross each other and are rotatably connected at the intersection, and a second lower support rod 82 that is rotatably connected between the first lower support rods 81 and the first bearing rods 11. Specifically, see Figure 1 , Figure 7 As shown, one end of each first lower support rod 81 is rotatably connected to the lower part of the first support rod 11 on one side, and the other end of the first lower support rod 81 is rotatably connected to the second lower support rod 82, which is rotatably connected to the first support rod 11 on the other side. During the folding process, the two first lower support rods 81 are folded in a cross shape, and the first lower support rod 81 and the second lower support rod 82 are also folded in a rotational manner.

[0068] In other embodiments, the lower cross brace assembly consists of two lower support rods that are rotatably connected and rotatably connected to the lower part of the first support rods 11 on both sides, or it consists of two lower support rods that cross each other and are rotatably connected at the intersection. One end of each lower support rod is rotatably connected to the first support rod 11 on one side, and the other end of the lower support rod is rotatably and slidably connected to the first support rod 11 on the other side.

[0069] In the expanded state, see Figure 1 As shown, the first bearing rod 11 and the second bearing rod 12 extend along the same length direction, the first bottom rod 21 and the second bottom rod 22 extend relative to each other in the front-to-back direction, the cross brace extends in the left-to-right direction, the support rod 3 is supported between the bearing rod 1 and the bottom support rod 2, and the linkage rod 4 is supported between the bottom support rod 2 and the support rod 3. (See also...) Figure 2 , Figure 3 as well as Figure 6As shown, in this state, the user can unlock the locking mechanism by pressing the unlocking piece 65, and drive the first support rod 31 and the second support rod 32 to fold or open relative to each other, thereby adjusting the length of the support rod 3, causing the load-bearing rod 1 to rotate up and down, thus adjusting the height of the foldable seat. A seating structure for the user is usually provided between the two load-bearing rods 1 on both sides; the height of the seating structure also changes during the rotation of the load-bearing rod 1.

[0070] When folding the seat, see Figure 7 As shown, a downward force is applied to the connection point of the two upper support rods 71, causing the two upper support rods 71 ​​to fold relative to each other, thereby releasing the locking of the cross brace and allowing the side supports on both sides to fold in the left and right directions. See also Figure 8 As shown, the second support rod 12 is flipped forward so that it folds upward toward the first support rod 11. During the flipping process, driven by the connecting part 121 and in cooperation with the linkage rod 4, the support rod 3 flips. The lower part of the support rod 3 drives the second bottom rod 22 to slide forward. Since there is a linkage between the folding of the bottom support rod 2 and the folding of the cross brace assembly 5, the cross brace assembly 5 also begins to fold as the second bottom rod 22 slides. See also Figure 9 As shown, when the second support rod 12 flips above the first support rod 11, it is pressed down, causing it to continue folding upwards towards the first support rod 11. Simultaneously, the first support rod 11 moves downwards and folds relative to the bottom support rod 2. During this process, the lower part of the support rod 3 is driven to continue moving the second bottom rod 22 forward, thereby causing the bottom support rod 2 and the cross brace assembly 5 to continue folding. At the same time, the support rod 3 also drives the linkage rod 4 to fold relative to the bottom support rod 2. During the folding of the cross brace assembly 5, the side supports on both sides move closer together, and the upper and lower cross brace assemblies also fold in the left-right direction.

[0071] See Figure 10 , Figure 11 As shown, in the folded state, the second support rod 12 is folded above the first support rod 11, the support rod 1 is folded above the bottom support rod 2, the first bottom rod 21 and the second bottom rod 22 are folded together in the front-to-back direction, and the side supports on both sides are folded together in the left-to-right direction. The foldable seat is folded in the up-down, front-to-back, and left-to-right directions, greatly reducing the size of the foldable seat. In this state, the foldable seat has a regular shape, which facilitates storage and packing, and is also easy to carry.

[0072] In summary, the foldable seat of this embodiment can be folded up and down, left and right, and front and back. During the folding process, the support rod 3, the linkage rod 4, and the cross support assembly 5 can achieve the linkage of folding in three directions. Simply flip it forward and press down the second support rod 12 to fold the seat. The folding operation is simple and the space occupied after folding is small, which brings convenience to the user.

[0073] 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 foldable seat, characterized in that: Including two sets of side supports disposed on both sides along a first direction, the side supports in the unfolded state include: The support rod extends inclinedly in the vertical direction; The bottom support rod includes a first bottom rod and a second bottom rod extending along a second direction, the first direction and the second direction being perpendicular to each other. The first bottom rod and the second bottom rod are slidably arranged along the length direction. The first bottom rod has a first side and a second side disposed on opposite sides of its own length direction. The first side is rotatably connected to the lower part of the bearing rod. A support rod extends vertically, with its upper part rotatably connected to the bearing rod and its lower part rotatably connected to the second base rod. The linkage has a first end and a second end located at opposite ends along its length. The first end is rotatably connected to the lower part of the bearing rod, or the first end is rotatably connected to the first side portion, and the second end is rotatably connected to the support rod. In the folded state, the bearing rod and the bottom support rod are brought closer together, the first bottom rod and the second bottom rod slide and fold, and the support rod and the linkage rod are folded between the bearing rod and the bottom support rod.

2. The foldable seat according to claim 1, characterized in that: The support rod includes a first support rod and a second support rod that extend obliquely in the vertical direction, the upper part of the first support rod and the lower part of the second support rod are rotatably connected about a first rotation center line, and the second support rod has a connecting part that extends downward from the rotation connection point; The first side portion is rotatably connected to the lower portion of the first supporting rod around the second rotation center line, the upper portion of the supporting rod is rotatably connected to the connecting portion around the third rotation center line, and the lower portion of the supporting rod is rotatably connected to the second bottom rod around the fourth rotation center line. The first, second, third, and fourth rotation center lines are parallel to each other and extend along the first direction. In the unfolded state, along the second direction, the third rotation center line is located between the first and second rotation center lines. In the folded state, the fourth rotation center line is closer to the second rotation center line, and along the second direction, the first rotation center line is located between the second and third rotation center lines.

3. The foldable seat according to claim 2, characterized in that: The foldable seat also includes a cross brace connected between the side supports on both sides and capable of being folded along the first direction. When the foldable seat is in a folded state, the cross brace is folded along the first direction, and the side supports on both sides are folded together along the first direction. The cross brace includes a cross brace assembly disposed between the bottom support rods on both sides. The cross brace assembly 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 on one side, and the other end of each bottom support rod is directly or indirectly rotatably connected to the second bottom support rod on the other side.

4. The foldable seat according to claim 3, characterized in that: One end of each of the bottom support rods is rotatably connected to the lower part of the support rod on one side about the fifth rotation center line, and the other end of the bottom support rod is rotatably connected to the second side on the other side about the sixth rotation center line. The fifth rotation center line and the sixth rotation center line are parallel to each other and extend in the vertical direction. In the unfolded state, along the second direction, the fifth rotation center line is located between the first rotation center line and the sixth rotation center line.

5. The foldable seat according to claim 2, characterized in that: In the unfolded state, the support rod extends from top to bottom away from the second rotation center line.

6. The foldable seat according to claim 1, characterized in that: The support rod includes a first support rod and a second support rod that are slidably arranged along the length direction. In the unfolded state, the first support rod and the second support rod each extend in the vertical direction. The upper part of the first support rod is rotatably connected to the bearing rod about a third rotation center line, and the lower part of the second support rod is rotatably connected to the second bottom rod about a fourth rotation center line. The third rotation center line and the fourth rotation center line are parallel to each other.

7. The foldable seat according to claim 6, characterized in that: The second support rod has a hollow cavity extending along its own length, and the first support rod is slidably inserted into the hollow cavity. The first end, the lower part of the bearing rod, and the front part of the first bottom rod are rotatably connected around the same rotation center line, and the second end is rotatably connected to the second support rod; A locking mechanism is provided between the first support rod and the second support rod to lock them together. When the locking mechanism is unlocked, the first support rod can slide relative to the second support rod to change the height of the support rod.

8. The foldable seat according to claim 7, characterized in that: The locking mechanism includes: At least one keyhole is provided on the second support rod, and the keyhole communicates with the hollow cavity. A locking element is movably disposed at the lower part of the first support rod and located within the hollow cavity. The locking element has a locking part, which is inserted into the lock hole when the locking mechanism is in the locked state. The locking element is an elastic hook, or the locking mechanism further includes a first elastic element disposed between the locking element and the first support rod, the first elastic element being configured to provide the force required for the locking part to move toward the keyhole; The second support rod is also movably provided with an unlocking component, which is used to drive the locking part to disengage from the locking hole, so that the locking mechanism is switched to the unlocked state.

9. The foldable seat according to claim 8, characterized in that: The locking member is provided with a driving structure, which is configured to drive the locking part to disengage from the lock hole during the upward movement of the first support rod relative to the second support rod. The upper part of the locking member is provided with a driving surface, which extends obliquely from top to bottom outward of the hollow cavity, and the driving surface constitutes the driving structure.

10. The foldable seat according to claim 6, characterized in that: The first support rod includes a first rod segment and a second rod segment. The upper part of the first rod segment is rotatably connected to the connection part of the bearing rod about a third rotation center line. The second rod segment is slidably disposed with respect to the first rod segment along the length direction of the first rod segment. A buffer is provided between the first rod segment and the second rod segment. The buffer is configured to provide a force for the second rod segment to move downward relative to the first rod segment.

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