Carrier

Abstract

The utility model belongs to the technical field of children products, and discloses a carrier which comprises a frame and a seat pocket assembly, the seat pocket assembly is arranged on the frame, the frame comprises a first support, a second support, a push rod and a linkage assembly, and the second support is movably connected with the first support; the push rod is movably connected with the first bracket and / or the second bracket; the linkage assembly is movably connected between the seat pocket assembly and the frame; when the carrier is switched from the unfolded state to the folded state, the push rod moves by a preset distance and then drives the seat pocket assembly and the frame to be close to each other through the linkage assembly until the frame is switched to the folded state. When the bicycle frame in the unfolded state is unlocked accidentally, although the push rod is in the movable state, the seat pocket assembly cannot be folded relative to the bicycle frame, the position of the seat pocket assembly cannot be changed greatly, and the bicycle frame starts to drive the seat pocket assembly to be folded only when the push rod moves by a preset distance. The seat pocket is prevented from being driven to move when the bicycle frame is unlocked accidentally, children are prevented from falling and being injured accidentally, and safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of children's products technology, and in particular to a carrier. Background Technology

[0002] Children's vehicles such as strollers and trailers typically include a frame and a seat mounted on the frame. For easy storage, the frame is designed to be foldable, with both folded and unfolded states. When unfolded, a child can sit in the seat, and when folded, it is easy to store.

[0003] Taking a stroller as an example, the frame typically includes a front support with the front wheels at the bottom, a rear support with the rear wheels at the bottom, and a push rod. The push rod, front support, and rear support are interconnected. When the frame is unfolded, the push rod, front support, and rear support are locked by a locking mechanism, keeping the stroller in the unfolded position. By operating the push rod, the front and rear supports can be moved closer together to fold the frame. Folding the frame causes the seat to move, folding and storing the seat on the frame.

[0004] The existing technology has the following defects: when the locking mechanism is accidentally unlocked, for example, due to user misoperation or when the front wheel encounters resistance such as crossing a step or speed bump, the push rod switches to the active state, causing the front and rear supports to retract, the frame to fold unexpectedly, and the seat to move under the influence of the frame, causing the child to fall and get injured, which poses a significant safety hazard.

[0005] Therefore, there is an urgent need for a new vehicle to solve the aforementioned problems in the existing technology. Utility Model Content

[0006] The purpose of this invention is to provide a vehicle that can prevent the seat from moving when the frame is accidentally unlocked, thus preventing the child inside the seat from falling out and getting injured, and improving safety.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A vehicle is provided, including a frame and a seat assembly, the seat assembly being disposed on the frame, the frame comprising:

[0009] First support;

[0010] The second support is movably connected to the first support;

[0011] A push rod is movably connected to the first bracket and / or the second bracket;

[0012] A linkage component is movably connected between the seat assembly and the frame; when the frame switches from an unfolded state to a folded state, the push rod moves a preset distance and then drives the seat assembly and the frame to move closer together through the linkage component.

[0013] As a preferred embodiment of the vehicle provided by this utility model, the seat assembly is connected to the first bracket and / or the second bracket, and the linkage assembly includes a first linkage assembly. The first linkage assembly is connected between the push rod and the first bracket and / or the second bracket. After the push rod moves by the preset distance, it drives the first bracket and the second bracket to move closer together through the first linkage assembly. The first bracket and / or the second bracket drive the seat assembly and the vehicle frame to move closer together.

[0014] As a preferred embodiment of the carrier provided by this utility model, one end of the first linkage component is rotatably connected to the push rod at the second pivot point, and the other end is connected to the first bracket and / or the second bracket.

[0015] When the frame is in the unfolded state, the second pivot point is located in the first position, and the first bracket and the second bracket have a first state.

[0016] When the push rod rotates the preset distance, it drives the second pivot point to move to the second position, and the first bracket and the second bracket have a second state;

[0017] The first state is the same as the second state.

[0018] As a preferred embodiment of the carrier provided by this utility model, the push rod, the first bracket, and the second bracket are all rotatable about the first central axis;

[0019] The first linkage component includes:

[0020] The first link, the first end of the first link being rotatably connected to the push rod;

[0021] The second link has a first end that is rotatably connected to the second end of the first link, and a second end that is rotatably connected to the first bracket;

[0022] The third link, the first end of which is rotatably connected to the second end of the first link, and the second end of which is rotatably connected to the second bracket;

[0023] The push rod, the first connecting rod, the third connecting rod, and the second bracket constitute a first four-bar linkage mechanism, and the push rod, the first connecting rod, the second connecting rod, and the first bracket constitute a second four-bar linkage mechanism.

[0024] As a preferred embodiment of the carrier provided by this utility model, the push rod includes a push rod body and a first extension, both of which rotate around the first central axis, and the end of the first extension away from the push rod body is rotatably connected to the first connecting rod.

[0025] The first link, the second link, and the third link are rotatably connected to the first pivot point, and the perpendicular line connecting the first pivot point and the first central axis is the first connecting line; the first extension is rotatably connected to the first link at the second pivot point.

[0026] When the frame is in the deployed state, the second pivot point is located on the side of the first connecting line closer to the second bracket; and / or,

[0027] When the frame is in the unfolded state, the second pivot point is located in the first position. When the push rod rotates the preset distance, the second pivot point is located in the second position. The first position and the second position are symmetrical about the first line.

[0028] As a preferred embodiment of the vehicle provided by this utility model, the perpendicular line connecting the second pivot point and the first central axis is the second connecting line;

[0029] Both the second bracket and the third connecting rod rotate around the third pivot point, and the perpendicular line connecting the third pivot point and the first central axis is the third connecting line;

[0030] When the frame is in the unfolded state, the first connecting line and the second connecting line form a first preset angle, and the first connecting line and the third connecting line form a second preset angle, wherein the second preset angle is greater than the first preset angle; and / or

[0031] When the vehicle frame is in the unfolded state, the first connecting line and the second connecting line form a first preset angle, wherein the first preset angle is ≤30°; and / or,

[0032] After the push rod rotates the preset distance toward the second bracket, the second pivot point passes the second position and moves upward as the push rod rotates, causing the first bracket and the second bracket to move closer together via the second connecting rod and the third connecting rod; and / or,

[0033] When the frame is in the unfolded state, the second link and the third link are collinear, and the first bracket, the second bracket, the second link, and the third link form a triangular structure.

[0034] As a preferred embodiment of the vehicle provided by this utility model, the seat assembly is connected to the first bracket and / or the second bracket; the linkage assembly includes a second linkage assembly, which is connected between the seat assembly and the first bracket and / or the second bracket. After the push rod moves a preset distance, it drives the first bracket and the second bracket to move closer together. The first bracket and / or the second bracket drive the seat assembly and the vehicle frame to move closer together through the second linkage assembly.

[0035] As a preferred embodiment of the carrier provided by this utility model, both the first bracket and the second bracket are rotatable about the first central axis;

[0036] The seat assembly is rotatably connected to the first bracket;

[0037] The second linkage component includes:

[0038] The fourth link, the first end of which is rotatably connected to the seat assembly;

[0039] The fifth link has its first end rotatably connected to the second end of the fourth link, and its second end rotatably connected to the first bracket.

[0040] A traction rod, the first end of which is rotatably connected to the second bracket, and the second end of the traction rod, the second end of the fourth connecting rod, and the first end of the fifth connecting rod are rotatably connected;

[0041] The first central axis and the rotation center of the first end of the traction rod are spaced apart; the first central axis, the rotation center of the seat assembly and the first bracket, and the rotation center of the first end of the fourth connecting rod are spaced apart.

[0042] As a preferred embodiment of the vehicle provided by this utility model, the traction rod, the fourth connecting rod and the fifth connecting rod are rotatably connected to the fourth pivot point, and the perpendicular line connecting the fourth pivot point and the first central axis is the fourth connecting line;

[0043] The fifth link and the first bracket are rotatably connected at the fifth pivot point, and the perpendicular line between the fifth pivot point and the first central axis is the fifth line.

[0044] When the vehicle frame is in the unfolded state, the rotation center of the first end of the traction rod is located on the side of the fourth connecting line closer to the fifth connecting line;

[0045] The traction rod and the second bracket are rotatably connected at the sixth pivot point, and the vertical line connecting the sixth pivot point and the first central axis is the sixth line.

[0046] When the frame is in the unfolded state, the fourth line and the sixth line form an angle γ, and the fourth line and the fifth line form an angle θ.

[0047] Where γ is less than θ; and / or γ ≤ 20°

[0048] As a preferred embodiment of the vehicle provided by this utility model, when the frame is in the unfolded state, the fourth link and the fifth link are collinear; the seat assembly, the first bracket, the fourth link, and the fifth link form a triangular structure; and / or,

[0049] The seat assembly includes a support base and a seat pocket disposed on the support base. One end of the support base is rotatably connected to the first bracket, and the other end of the support base is rotatably connected to the fourth connecting rod. The seat pocket assembly is rotatably connected to the support base about a second central axis, which extends vertically or forms a third preset angle with the vertical direction.

[0050] The beneficial effects of this utility model are:

[0051] The vehicle provided by this utility model requires the push rod to move a preset distance before switching from an unfolded to a folded state. This movement, via a linkage component, causes the seat assembly and frame to move closer together until the frame switches from the unfolded to the folded state. During this preset distance movement, the frame does not fold. Therefore, even if the frame is accidentally unlocked while unfolded, the push rod will not cause the seat assembly to fold relative to the frame. The seat assembly will not undergo significant positional changes. Only after the push rod has moved the preset distance will the frame begin to fold relative to the frame. This prevents the seat assembly from moving when the frame is accidentally unlocked, thus avoiding accidental falls and injuries to children inside the seat and improving the vehicle's safety. Attached Figure Description

[0052] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0053] Figure 1 This is a first axonometric drawing of the vehicle provided in a specific embodiment of this utility model;

[0054] Figure 2 This is a first side view of the vehicle provided in a specific embodiment of this utility model;

[0055] Figure 3 yes Figure 2 A magnified view of a section at point C;

[0056] Figure 4 This is an axonometric drawing of the vehicle frame provided in a specific embodiment of this utility model;

[0057] Figure 5 yes Figure 4 A magnified view of a section at point D;

[0058] Figure 6 This is a second side view of the vehicle provided in a specific embodiment of this utility model;

[0059] Figure 7 This is a third side view of the vehicle provided in a specific embodiment of this utility model;

[0060] Figure 8 This is a simplified schematic diagram of the first linkage component provided in a specific embodiment of this utility model;

[0061] Figure 9 This is a simplified schematic diagram of the second linkage component provided in a specific embodiment of this utility model;

[0062] Figure 10 This is a second isometric view of the vehicle provided in a specific embodiment of this utility model.

[0063] In the picture:

[0064] 1. Frame; 2. Seat assembly; 3. First wheel; 4. Second wheel; 5. First crossbeam; 6. Second crossbeam; 7. Wheel locking mechanism;

[0065] 11. First support; 12. Second support; 13. Push rod; 14. First linkage assembly; 15. Second linkage assembly;

[0066] 111. First frame; 112. Second extension;

[0067] 121. Second frame; 122. Third extension; 123. Fourth extension;

[0068] 131. Push rod body; 132. First extension;

[0069] 1311. Fixed rod; 1312. Adjusting rod; 1313. Handle; 1314. Push rod unlocking component;

[0070] 141. First link; 142. Second link; 143. Third link;

[0071] 151. Support base; 152. Fourth link; 153. Fifth link; 154. Traction rod;

[0072] 21. Seat panel; 22. Backrest panel; 23. Pedal; 24. Armrest; 25. Canopy pole;

[0073] 231. Avoid the gap;

[0074] 100, First central axis; 200, Second central axis. Detailed Implementation

[0075] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0076] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0077] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0078] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0079] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0080] In the embodiments of this utility model, the same reference numerals denote the same parts, and for the sake of brevity, detailed descriptions of the same parts are omitted in different embodiments.

[0081] like Figure 1 and Figure 2 As shown, this embodiment provides a vehicle including a frame 1 and a seat assembly 2. The seat assembly 2 is disposed on the frame 1, which has an unfolded state and a folded state. This vehicle prevents the seat from moving when the frame 1 is accidentally unlocked, thus preventing the child inside the seat from falling and getting injured, and improving safety.

[0082] The vehicle in this embodiment can be a trolley or a trailer.

[0083] The frame 1 includes a first support 11, a second support 12, a push rod 13, and a linkage assembly. The second support 12 is movably connected to the first support 11, and the two can move away from or towards each other to unfold or fold the frame 1. The push rod 13 is movably connected to the first support 11 and / or the second support 12; that is, the push rod 13 can be movably connected only to the first support 11, only to the second support 12, or simultaneously to both. The linkage assembly is movably connected between the seat assembly 2 and the frame 1. Folding of the vehicle can be achieved by operating the push rod 13. Specifically, when the frame 1 switches from an unfolded state to a folded state, the push rod 13 moves a preset distance and then, through the linkage assembly, causes the seat assembly 2 to move closer to the frame 1.

[0084] In this embodiment, when the vehicle switches from an unfolded state to a folded state, the push rod 13 must move a preset distance before the linkage component moves the seat assembly 2 and the frame 1 closer together until the frame 1 switches from the unfolded state to the folded state. During the preset distance movement of the push rod 13, the frame 1 will not be folded. Therefore, when the frame 1 is accidentally unlocked in the unfolded state, although the push rod 13 is in a movable state, its movement will not cause the seat assembly 2 to fold relative to the frame 1, nor will the seat assembly 2 undergo a significant positional change. Only after the push rod 13 has moved the preset distance will the frame 1 begin to fold relative to the seat assembly 2. This prevents the seat assembly 2 from moving when the frame 1 is accidentally unlocked, thus avoiding accidental falls and injuries to the child inside the seat assembly 2 and improving the safety of the vehicle.

[0085] The first bracket 11 is positioned in front of the second bracket 12, as shown in the reference. Figure 1 and Figure 2 The orientation is from left to right, which is the same as the direction from front to back. With the frame 1 deployed, in this direction from front to back, the first support 11 gradually tilts upwards, the second support 12 gradually tilts downwards, and the push rod 13 is located behind the first support 11 and above the second support 12. In this direction from front to back, the push rod 13 gradually tilts upwards. The user can push the vehicle from behind the push rod 13.

[0086] In this embodiment, specifically, the seat assembly 2 is connected to the first support 11 and / or the second support 12, and the linkage assembly includes a first linkage assembly 14, which is connected between the push rod 13 and the first support 11 and / or the second support 12. The first linkage assembly 14 can be connected between the push rod 13 and the first support 11, between the push rod 13 and the second support 12, or between the push rod 13 and the first support 11 and the second support 12.

[0087] After the push rod 13 moves a preset distance, it drives the first support 11 and the second support 12 to move closer together via the first linkage component 14. During the process of the first support 11 and the second support 12 moving closer together, the first support 11 and / or the second support 12 drive the seat assembly 2 to move closer to the frame 1. By setting the first linkage component 14, the first support 11 and the second support 12 of the frame 1 can be moved closer together and folded after the push rod 13 moves a preset distance. Then, the moving closer together and folding of the first support 11 and the second support 12 drives the seat assembly to move closer to the frame and fold. With the help of the first linkage component 14, the moving closer together and folding of the first support 11 and the second support 12, as well as the moving closer together and folding of the seat assembly 2 towards the frame 1, can be achieved.

[0088] The preset distance for the movement of the push rod 13 mentioned above can be a preset angle for the rotation of the push rod 13, or it can be a preset distance for the movement of the push rod 13, such as a preset distance for linear sliding.

[0089] In this embodiment, the push rod 13 is rotatably connected to the first linkage component 14. When the frame 1 switches from the unfolded state to the folded state, the push rod 13 rotates by a preset angle and then drives the first support 11 and the second support 12 to move closer together through the first linkage component 14. When the frame 1 in the unfolded state is accidentally unlocked, although the push rod 13 is in a rotatable state, the rotation of the push rod 13 is within the preset angle range and will not cause the frame 1 to start folding. Consequently, the seat assembly 2 mounted on the frame 1 will not undergo a significant positional change. Only after the push rod 13 rotates by the preset angle will it drive the first support 11 and the second support 12 to move closer together through the first linkage component 14 until the frame 1 is fully folded. This prevents the seat assembly 2 from moving when the frame 1 is accidentally unlocked, thus avoiding accidental falls and injuries to children and improving the safety of the vehicle.

[0090] For example, the preset angle can be in the range of 20° to 90°, further, in the range of 30° to 70°, and even further, in the range of 35° to 60°. For instance, the preset angle can be 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, etc., and can be set according to design requirements. The specific value of the preset angle is not limited here.

[0091] In this embodiment, see Figure 2 , Figure 5 as well as Figure 8 One end of the first linkage component 14 is rotatably connected to the push rod 13 at the second pivot point O2, and the other end is connected to the first bracket 11 and / or the second bracket 12. When the frame 1 is in the unfolded state, the second pivot point O2 is in the first position, at which time the first bracket 11 and the second bracket 12 have the first state. When the push rod 13 rotates a preset distance, it drives the second pivot point to move to the second position, and the first bracket 11 and the second bracket 12 have the second state. The first state and the second state are the same. During the rotation of the push rod 13 a preset distance, the second pivot point O2 moves from the first position to the second position, and the first support 11 and the second support 12 change from the first state to the intermediate state, and then from the intermediate state to the second state, which is the same as the first state. On the one hand, this can effectively reduce the range of motion of the first support 11 and the second support 12 during the rotation of the push rod 13 a preset distance. That is, although the first support 11 and the second support 12 move during the rotation of the push rod 13 a preset distance, the range of motion is very small. On the other hand, it ensures that the first support 11 and the second support 12 are in the same state when the push rod 13 starts to move and when it moves a preset distance, that is, in a relatively unfolded state. This ensures that the first support 11 and the second support 12 will not fold and retract when the push rod 13 moves a preset distance, and that the first support 11 and the second support 12 can only fold and retract into place after the push rod 13 has moved a preset distance.

[0092] In this embodiment, the lower end of the push rod 13, the upper end of the first bracket 11, and the upper end of the second bracket 12 are rotatably connected together, such as... Figure 1 As shown, push rod 13, first bracket 11, and second bracket 12 are all rotatable about the first central axis 100. When the frame 1 is in the unfolded state, the first central axis 100 is exemplarily horizontally arranged and extends in the left-right direction.

[0093] See Figure 2 , Figure 3 , Figure 4 as well as Figure 5 The first linkage component 14 includes a first link 141, a second link 142, and a third link 143. The first link 141, the second link 142, and the third link 143 work together to enable the push rod 13 to drive the first bracket 11 and the second bracket 12 to fold and close together.

[0094] Specifically, the first end of the first connecting rod 141 is rotatably connected to the push rod 13, and the second end of the first connecting rod 141 is rotatably connected to the first ends of both the second connecting rod 142 and the third connecting rod 143. The second end of the second connecting rod 142 is rotatably connected to the first bracket 11; the second end of the third connecting rod 143 is rotatably connected to the second bracket 12. (Refer to...) Figure 3 In the orientation of the frame 1, with the frame 1 in the unfolded state, the upper end of the first link 141 is rotatably connected to the push rod 13, the lower end of the first link 141, the rear end of the second link 142, and the front end of the third link 143 are rotatably connected together. The front end of the second link 142 is rotatably connected to the first bracket 11, and the rear end of the third link 143 is rotatably connected to the second bracket 12. In this embodiment, the rotatable connection between the first link 141 and the push rod 13 is located above the rotatable connection between the third link 143 and the second bracket 12.

[0095] Push rod 13, first link 141, third link 143, and second bracket 12 constitute a first four-bar linkage mechanism, while push rod 13, first link 141, second link 142, and first bracket 11 constitute a second four-bar linkage mechanism. When the frame 1 is folded, push rod 13 rotates downward, thereby driving the first link 141 to move. The lower end of the first link 141 drives the rear end of the second link 142 and the front end of the third link 143 to move upward, causing the second link 142 and the third link 143 to move closer together. Then, the front end of the second link 142 pulls the first bracket 11, and the rear end of the third link 143 pulls the second bracket 12, causing the first bracket 11 and the second bracket 12 to move closer together, thus achieving the folding of the frame 1. After the frame 1 is folded, the first bracket 11, the second bracket 12, and push rod 13 are retracted together.

[0096] See Figure 2 , Figure 6 as well as Figure 7 Push rod 13 rotated a certain angle relative to its initial position, but the frame 1 did not begin to fold during the process.

[0097] See Figure 5 The push rod 13 includes a connected push rod body 131 and a first extension 132. When the frame 1 is in the unfolded state, the first extension 132 is located at the lower end of the push rod body 131. Both the push rod body 131 and the first extension 132 rotate about the first central axis 100. The end of the first extension 132 away from the push rod body 131 is rotatably connected to the upper end of the first connecting rod 141. By providing the first extension 132 at the lower end of the push rod body 131, a rotatable connection with the first connecting rod 141 is easily achieved.

[0098] like Figure 8 The diagram shows a simplified view of the first support 11, the second support 12, the push rod 13, and the first linkage assembly 14 in the unfolded state of the frame 1. The rotation center of the push rod 13, the first support 11, and the second support 12 is O1, which coincides with the aforementioned first central axis 100. The rotation center of the rotatable connection between the first extension 132 and the first connecting rod 141 is O2; the rotation center of the rotatable connection between the first connecting rod 141, the first support 11, and the second support 12 is O3; the rotation center of the rotatable connection between the second support 12 and the third connecting rod 143 is O4; and the rotation center of the rotatable connection between the second connecting rod 142 of the first support 11 is O5.

[0099] That is, the first link 141, the second link 142, and the third link 143 are rotatably connected to the first pivot point O3. The first extension 132 is rotatably connected to the first link 141 at the second pivot point O2. The perpendicular line connecting the first pivot point O3 and the first central axis 100 is defined as the first connecting line, i.e. Figure 8 The dashed lines O1-O3 in the diagram represent the first connecting line. When the frame 1 is in the unfolded state, the second pivot point O2 is located on the side of the first connecting line closer to the second bracket 12.

[0100] when Figure 8When the push rod body 131 shown in the diagram begins to rotate downwards (i.e., clockwise), the first extension 132 rotates upwards (i.e., counterclockwise) under the drive of the push rod body 131. The first extension 132 drives the first bracket 11 and the second bracket 12 to move through the first connecting rod 141. The rotation center O3 first moves down a certain distance from the initial position, and then moves up back to the initial position. Specifically, after the first extension 132 rotates a preset angle under the drive of the push rod body 131, the rotation center O3 moves up back to the initial position. During the process of the rotation center O3 moving down and then up, the first bracket 11 and the second bracket 12 first slightly retract from the initial position, and then relatively unfold back to the initial position. Therefore, when the push rod 13 rotates a preset angle, the state of the frame 1 is consistent with the unfolded state. When the push rod 13 continues to rotate after rotating a preset angle, the rotation center O3 moves up from the initial position under the drive of the first connecting rod 141, causing the first bracket 11 and the second bracket 12 to move closer to each other, and the frame 1 begins to fold until it switches to the folded state.

[0101] In other words, the rotation of push rod 13 to the preset angle is a no-travel phase. Furthermore, due to the characteristics of the four-bar linkage, during this no-travel phase, although the rotation center O3 first moves downwards and then upwards, and the first support 11 and the second support 12 move closer to each other and then further apart back to their original positions, the displacement of the rotation center O3, the first support 11, and the second support 12 is very small. By designing the parameters of the four-bar linkage during the design phase, the displacement of the first support 11 and the second support 12 during the no-travel phase can be controlled, making the displacement visually imperceptible or difficult for a child inside the seat assembly 2 to perceive. That is, during the rotation of push rod 13 to the preset angle, the frame 1 remains almost unchanged.

[0102] Furthermore, when the frame 1 is in the unfolded state, the second pivot point O2 is in the first position; when the push rod 13 rotates a preset distance, the second pivot point O2 is in the second position. The first position and the second position are about the first line ( Figure 8 The dashed lines O1-O3 in the diagram are symmetrical. During the rotation of the push rod 13 a preset distance, it causes the second pivot point O2 to move from the first position across the first connecting line to a second position symmetrical to the first position. According to the characteristics of the four-bar linkage, since the first and second positions of the second pivot point O2 are symmetrical, the relative positions of the first support 11, the second support 12, the second connecting rod 142, and the third connecting rod 143 are completely consistent in both positions, thus ensuring that the first and second states are consistent. That is to say, at the instant the push rod 13 begins to move, and at the preset distance of movement, the first support 11, the second support 12, the second connecting rod 142, and the third connecting rod 143 are all in a fully extended state and have not yet begun to fold or retract.

[0103] Furthermore, the perpendicular line connecting the second pivot point O2 and the first central axis 100 is defined as the second line (i.e., Figure 8 The O1-O2 line in the diagram). Both the second support 12 and the third connecting rod 143 rotate around the third pivot point O4. The perpendicular line connecting the third pivot point O4 and the first central axis 100 is defined as the third connecting line (i.e., Figure 8 (The O1-O4 connection in the middle).

[0104] In this embodiment, when the frame 1 is in the unfolded state, the first connecting line and the second connecting line form a first preset angle α, and the first connecting line and the third connecting line form a second preset angle β, wherein the second preset angle β is greater than the first preset angle α.

[0105] For example, the value range of the first preset included angle α is ≤30°, such as 10°, 15°, 20°, 23°, 25°, 30°, etc., but is not limited to the listed values ​​and ranges. When the push rod 13 rotates downward by 2α, and continues to rotate, the first bracket 11 and the second bracket 12 move closer together, and the frame 1 begins to fold. The value range of this first preset included angle α is reasonable, avoiding an excessively large value that would require rotating the push rod 13 at a large angle when folding the frame 1, making the folding operation more convenient.

[0106] For example, the first preset included angle α is 20°, and the second preset included angle β is 23°. When the frame 1 switches from the unfolded state to the folded state, the push rod 13 rotates downwards by approximately 40 degrees. Upon further rotation, the first bracket 11 and the second bracket 12 move closer together, and the frame 1 begins to fold. See also... Figure 2 When the vehicle frame 1 is in the unfolded state, the second link 142 and the third link 143 are collinear, and the first bracket 11, the second bracket 12, the second link 142 and the third link 143 form a triangular structure to improve the stability of the vehicle frame 1 in the unfolded state.

[0107] In this embodiment, after the push rod 13 rotates a preset distance toward the second bracket 12, the second pivot point O2 passes the second position and moves upward with the rotation of the push rod 13. Through the second connecting rod 142 and the third connecting rod 143, the first bracket 11 and the second bracket 12 are brought closer together, realizing the folding and retraction of the frame 1. When the second pivot point O2 passes the second position and rotates upward under the action of the push rod 13, the second connecting rod 142 and the third connecting rod 143 gradually move closer together from a collinear state, making the included angle between the first bracket 11 and the second bracket 12 smaller. Thus, the first bracket 11 and the second bracket 12 are brought closer together and retracted under the action of the second connecting rod 142 and the third connecting rod 143.

[0108] In this embodiment, see Figure 2The seat assembly 2 is connected to the first support 11 and / or the second support 12; the linkage assembly also includes a second linkage assembly 15. The second linkage assembly 15 is connected between the seat assembly 2 and the first support 11 and / or the second support 12. After the push rod 13 moves a preset distance, it causes the first support 11 and the second support 12 to move closer together. The first support 11 and / or the second support 12, through the second linkage assembly 15, cause the seat assembly 2 to move closer to the frame 1. By setting the second linkage assembly 15, when the frame 1 is folded after the push rod 13 rotates a preset distance, the first support 11 and / or the second support 12 can cause the seat assembly 2 to move closer to the frame 1 and fold, thereby allowing the seat assembly 2 to fold together with the frame 1, further reducing the volume of the folded load.

[0109] In this embodiment, the second linkage component 15 is movably connected to both the first bracket 11 and the second bracket 12. When the first bracket 11 and the second bracket 12 move closer to each other, the second linkage component 15 drives the seat component 2 to move closer to the first bracket 11, so that the seat component 2 and the frame 1 are folded together, reducing the space occupied by the folded vehicle.

[0110] Specifically, see Figure 3 and Figure 5 The second linkage component 15 includes a fourth link 152, a fifth link 153, and a traction rod 154.

[0111] The seat assembly 2 is rotatably connected to the first bracket 11; the first end of the fourth link 152 is rotatably connected to the seat assembly 2; the first end of the fifth link 153 is rotatably connected to the second end of the fourth link 152, and the second end of the fifth link 153 is rotatably connected to the first bracket 11. The first end of the traction rod 154 is rotatably connected to the second bracket 12, and the second end of the traction rod 154, the second end of the fourth link 152, and the first end of the fifth link 153 are rotatably connected.

[0112] Furthermore, the seat assembly 2 includes a support base 151 and a seat pocket disposed on the support base 151, the seat pocket providing a base for a child to sit on. One end of the support base 151 is rotatably connected to the first bracket 11; the first end of the fourth link 152 is rotatably connected to the other end of the support base 151. When the frame 1 is in the unfolded state, the support base 151 is located above the first bracket 11, and the seat pocket is disposed on the support base 151. Specifically... Figure 3 In the unfolded state shown, the rear end of the support base 151 is rotatably connected to the first bracket 11, the front end of the support base 151 is rotatably connected to the upper end of the fourth link 152, and the lower end of the fourth link 152, the upper end of the fifth link 153, and the front end of the traction rod 154 are rotatably connected together. The lower end of the fifth link 153 is rotatably connected to the first bracket 11, and the rear end of the traction rod 154 is rotatably connected to the second bracket 12.

[0113] Further, see Figure 3 and Figure 5 The first support 11 includes a first frame 111 and a second extension 112 disposed on the first frame 111. Both the first frame 111 and the second extension 112 rotate around a first central axis 100. The rear end of the support base 151 is rotatably connected to the second extension 112. The second support 12 includes a second frame 121 and a third extension 122 and a fourth extension 123 disposed on the second frame 121. The third extension 122 is located above the fourth extension 123. The third extension 122 is rotatably connected to the rear end of the traction rod 154, and the fourth extension 123 is rotatably connected to the rear end of the third connecting rod 143. The first central axis 100 and the rotation center of the first end of the traction rod 154 are spaced apart; the first central axis 100, the rotation center of the support base 151 and the first support 11, and the rotation center of the first end of the fourth connecting rod 152 are spaced apart.

[0114] Figure 9 The diagram shows a simplified representation of the second linkage assembly 15, the first support 11, and the second support 12. The rotation centers of the first support 11 and the second support 12 are O1, O6, O7, and O8 respectively. The rotation center of the connection between the third extension 122 of the second support 12 and the traction rod 154 is O6. The rotation center of the connection between the traction rod 154 and the fifth link 153 is O7. The rotation center of the connection between the fifth link 153 and the first frame 111 of the first support 11 is O8. The rotation center of the connection between the fourth link 152 and the support base 151 is O9, and O10 is O10. The third extension 122, the traction rod 154, the fifth link 153, and the first frame 111 constitute a third four-bar linkage. The fourth link 152, the support base 151, and the second extension 112 constitute a fourth four-bar linkage.

[0115] When the push rod 13 rotates to a preset angle, causing the frame 1 to fold, the push rod 13 drives the first bracket 11 and the second bracket 12 to rotate relative to each other and move closer together via the first linkage assembly 14. During the rotation of the second bracket 12, the traction rod 154 rotates via the third extension 122. When the traction rod 154 rotates, it causes the rotation center O7 to move in the direction of the first central axis 100, causing the fourth link 152 and the fifth link 153 to rotate relative to each other and move closer together. When the fourth link 152 and the fifth link 153 move closer together, they drive the support seat 151 to rotate relative to the first bracket 11 and move closer to the first bracket 11, thus completing the process. Specifically... Figure 3 When the frame 1 is folded, the front end of the support seat 151 rotates downward and gradually moves closer to the first bracket 11.

[0116] In this embodiment, the traction rod 154, the fourth connecting rod 152, and the fifth connecting rod 153 are rotatably connected to the fourth pivot point O7. The perpendicular line connecting the fourth pivot point and the first central axis 100 is the fourth connecting line. Figure 9 The dashed lines O7-O1 in the diagram represent the fourth connecting line. The fifth connecting rod 153 and the first frame 111 of the first support 11 are rotatably connected to the fifth pivot point O8. The perpendicular line connecting the fifth pivot point and the first central axis 100 is the fifth connecting line (i.e., Figure 9 (The O8-O1 connection in the middle).

[0117] With the frame 1 in its deployed state, the rotation center O6 of the first end of the tow bar 154 is located on the side of the fourth connecting line closer to the fifth connecting line. (Refer to...) Figure 9 In the orientation of the push rod 13, during the rotation of the preset angle, the rotation center O6 rotates clockwise under the drive of the second bracket 12. The rotation center O7 moves from its initial position away from the rotation center O1 (moves to the left), and then moves closer to the rotation center O1 (moves to the right) to return to its initial position. During this process, the support seat 151 and the first bracket 11 move closer and then further apart. During the idle phase of the push rod 13 rotating the preset angle, although the rotation center O7 moves to the left and then to the right, and the support seat 151 and the first bracket 11 move closer and then further apart to return to their original positions, the displacement of the rotation center O7, the support seat 151, and the first bracket 11 is very small. During the rotation of the push rod 13 at the preset angle, the second linkage component 15 remains almost unchanged. See also Figure 7 When push rod 13 rotates through a preset angle, the first linkage component 14 and the second linkage component 15 remain in the unfolded state. Only after continuing to rotate push rod 13 can the entire frame 1 be folded through the first linkage component 14 and the second linkage component 15.

[0118] The traction rod 154 and the third extension 122 are rotatably connected at the sixth pivot point O6. The vertical line connecting the sixth pivot point O6 and the first central axis 100 is the sixth line (i.e., Figure 9 (The O6-O1 connection in the middle). When the frame 1 is in the unfolded state, the fourth connection and the sixth connection form an angle γ, and the fourth connection and the fifth connection form an angle θ, where γ is less than θ, ensuring that the frame 1 is in the unfolded state, and the rotation center O6 of the first end of the traction rod 154 is located on the side of the fourth connection closer to the fifth connection. When the push rod 13 rotates at a preset angle, the sixth pivot point O6 is moved from the third position to the position relative to the fourth connection ( Figure 9 The fourth position is symmetrical to the dotted line O7-O1 in the middle. During this process, the movement of the support 151 is very small, so that the seat bag set on the support 151 hardly moves, ensuring safety.

[0119] For example, γ ≤ 20°. When the third extension 122 rotates by 2γ, the frame 1 begins to fold. This angle range is reasonable, avoiding the need for the third extension 122 to rotate a large angle when folding the frame 1 due to an excessively large value, thus making the folding operation more convenient.

[0120] For example, γ is 16° and θ is 21°.

[0121] In this embodiment, when the frame 1 is in the unfolded state, the fourth link 152 and the fifth link 153 are collinear; the support base 151, the first bracket 11, the fourth link 152 and the fifth link 153 form a triangular structure to improve the stability of the frame 1 in the unfolded state.

[0122] Optionally, see Figure 1 and Figure 2 The push rod 13 is a telescopic rod that can be shortened when the frame 1 is folded, further reducing the volume of the frame 1 after folding.

[0123] Specifically, the push rod 13 includes a fixed rod 1311 and an adjusting rod 1312. The fixed rod 1311, the upper end of the first bracket 11, and the upper end of the second bracket 12 are rotatably connected together, and the first extension 132 is disposed at the lower end of the fixed rod 1311. A cavity is provided inside the fixed rod 1311, and one end of the adjusting rod 1312 is slidably inserted into the cavity of the fixed rod 1311 along its length direction. By adjusting the position of the adjusting rod 1312 inside the fixed rod 1311, the length of the push rod 13 can be adjusted.

[0124] Furthermore, a handle 1313 is provided at the end of the adjusting rod 1312 extending beyond the fixed rod 1311. The handle 1313 is set at an angle to the adjusting rod 1312, facilitating the adjustment of the length of the push rod 13 and the pushing of the carrier. Exemplarily, the handle 1313 and the adjusting rod 1312 form a T-shaped structure. A push rod unlocking member 1314 is provided on the handle 1313. When the length of the push rod body 131 is adjusted to a certain length, the fixed rod 1311 and the adjusting rod 1312 are locked by the push rod 13 locking mechanism, thus fixing the push rod body 131 at that length. By operating the push rod unlocking member 1314, the fixed rod 1311 and the adjusting rod 1312 can be unlocked.

[0125] In some embodiments, the push rod unlocking component 1314 is a button-type structure, which unlocks the push rod 13 locking mechanism by pressing. In other embodiments, the push rod unlocking component 1314 can be a sliding structure, which can be set on the handle 1313 or the adjusting rod 1312. By operating the push rod unlocking component 1314 to slide relative to the handle 1313 or the adjusting rod 1312, the push rod 13 locking mechanism is unlocked.

[0126] Optionally, the seat surrounds the second central axis 200 (see...) Figure 6It is rotatably connected to the support base 151.

[0127] In this embodiment, the second central axis 200 extends vertically, meaning the seat rotates around the vertical axis, allowing the seat to have a forward-facing and a reverse-facing usage state. Users can selectively position the child in the seat so that they face forward (forward-facing usage state) or backward (reverse-facing usage state), providing greater flexibility.

[0128] In other embodiments, the second central axis 200 may form a third preset angle with the vertical direction. For example, the value of the third preset angle is greater than 0° and less than or equal to 10°, that is, the second central axis 200 may form an angle within 10° with the vertical direction, which can also realize the switching between the forward use state and the reverse use state.

[0129] See Figure 1 and Figure 2 The seat includes a seat plate 21, a backrest 22, a footrest 23, and an armrest 24. The seat plate 21 is rotatably connected to the support base 151 about a second central axis 200. The backrest 22 is rotatably connected to one end of the seat plate 21; the footrest 23 is rotatably connected to the other end of the seat plate 21. The armrest 24 is rotatably connected to the seat plate 21 and / or the backrest 22, that is, the armrest 24 can be rotatably connected to the seat plate 21, rotatably connected to the backrest 22, or rotatably connected to both the seat plate 21 and the backrest 22 at the same point. When a child sits on the seat plate 21, leans against the backrest 22, and places their feet in the footrest 23, the backrest 22 and the footrest 23 can be adjusted to the child's most comfortable position by rotating them. The armrest 24 is positioned around the front of the child to prevent the child from falling off the seat plate 21. Before the vehicle is folded, the armrest 24 and backrest 22 can be rotated toward the seat 21 to fold together.

[0130] In this embodiment, the armrest 24 is rotatably connected to the seat 21 and the backrest 22 at the same point, which can save the space occupied by the seat after folding.

[0131] Furthermore, the seat also includes a canopy assembly. The canopy assembly includes a canopy pole 25 and a sunshade. See also Figure 1 and Figure 2 The canopy rod 25 is roughly U-shaped, with both ends rotatably connected to the backrest panel 22, allowing it to rotate closer to or further away from the backrest panel 22. A sunshade is connected to the upper ends of the canopy rod 25 and the backrest panel 22, and can fold or unfold as the canopy rod 25 rotates. When unfolded, the sunshade provides shade and rain protection.

[0132] For example, the material of the shielding element can be a flexible and deformable material such as cloth or plastic film.

[0133] In this embodiment, the rotation axis of the pedal 23 and the rotation axis of the backrest 22 are parallel, and both are parallel to the first central axis 100.

[0134] The rotatable arrangement of the pedal 23 relative to the seat plate 21 allows the pedal 23 to be flipped upwards when switching between forward and reverse use modes, preventing interference between the pedal 23 and other components (such as the push rod 13). See also Figure 1 The pedal 23 is provided with a clearance notch 231. When the seat is switched to the reverse use state, the clearance notch 231 is used to accommodate the push rod 13 to prevent the push rod 13 from interfering with the flipping of the pedal 23.

[0135] Of course, in other embodiments, the seat can also be fixedly installed on the support base 151, and the seat does not have a reversing function. In this case, the aforementioned seat plate 21 can be directly fixed on the support base 151, or, without setting the seat plate 21, the backrest plate 22 can be directly rotatably installed on the support base 151.

[0136] like Figure 1 and Figure 10 As shown, along the left-right direction, there are two first brackets 11 spaced apart, and two second brackets 12 spaced apart. The upper ends of the two first brackets 11 are rotatably connected to the upper ends of the two second brackets 12 in a corresponding manner. The push rod 13 is located between the two first brackets 11 (second brackets 12). Each of the two first brackets 11 has a first wheel 3 at its bottom, and each of the two second brackets 12 has a second wheel 4 at its bottom.

[0137] A first crossbeam 5 is provided between the two first wheels 3. The first crossbeam 5 can be connected to the two first supports 11 or to the wheel frame of the two first wheels 3. A second crossbeam 6 is provided between the two second wheels 4. The second crossbeam 6 is connected to the bottom of the two second supports 12, and the axles of the two second wheels 4 are installed at both ends of the second crossbeam 6.

[0138] The second crossbeam 6 is equipped with a wheel locking device 7, which can lock and unlock the second wheel 4 by operating the wheel locking device 7. When the vehicle does not need to move, locking the second wheel 4 by the wheel locking device 7 can prevent the second wheel 4 from rotating and avoid accidental movement of the vehicle.

[0139] For example, the wheel locking member 7 is rotatably disposed on the second crossbeam 6 and has a locked position and an unlocked position. By stepping on the wheel locking member 7, the wheel locking member 7 can be rotated between the locked position and the unlocked position to lock or unlock the wheel.

[0140] Optionally, the vehicle also includes a carrying component made of flexible material, which is connected to the first crossbeam 5, the first support 11 and the second support 12 to form a carrying space, on which items can be placed.

[0141] For example, the material of the load can be a flexible material such as cloth or plastic film, which will tighten or loosen as the frame 1 is folded or unfolded.

[0142] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A vehicle, characterized in that, The vehicle includes a frame and a seat assembly, the seat assembly being disposed on the frame, the frame comprising: First support; The second support is movably connected to the first support. A push rod is movably connected to the first bracket and / or the second bracket; A linkage component is movably connected between the seat assembly and the vehicle frame; When the frame switches from the unfolded state to the folded state, the push rod moves a preset distance and then drives the seat assembly to move closer to the frame through the linkage component.

2. The vehicle according to claim 1, characterized in that, The seat assembly is connected to the first bracket and / or the second bracket. The linkage assembly includes a first linkage assembly, which is connected between the push rod and the first bracket and / or the second bracket. After the push rod moves the preset distance, it drives the first bracket and the second bracket to move closer together through the first linkage assembly. The first bracket and / or the second bracket drive the seat assembly and the vehicle frame to move closer together.

3. The vehicle according to claim 2, characterized in that, One end of the first linkage component is rotatably connected to the push rod at the second pivot point, and the other end is connected to the first bracket and / or the second bracket; When the frame is in the unfolded state, the second pivot point is located in the first position, and the first bracket and the second bracket have a first state. When the push rod rotates the preset distance, it drives the second pivot point to move to the second position, and the first bracket and the second bracket have a second state; The first state is the same as the second state.

4. The vehicle according to claim 2, characterized in that, The push rod, the first bracket, and the second bracket are all rotatable about the first central axis; The first linkage component includes: The first link, the first end of the first link being rotatably connected to the push rod; The second link has a first end that is rotatably connected to the second end of the first link, and a second end that is rotatably connected to the first bracket; The third link, the first end of which is rotatably connected to the second end of the first link, and the second end of which is rotatably connected to the second bracket; The push rod, the first connecting rod, the third connecting rod, and the second bracket constitute a first four-bar linkage mechanism, and the push rod, the first connecting rod, the second connecting rod, and the first bracket constitute a second four-bar linkage mechanism.

5. The vehicle according to claim 4, characterized in that, The push rod includes a push rod body and a first extension, both of which rotate around the first central axis. The end of the first extension away from the push rod body is rotatably connected to the first connecting rod. The first link, the second link, and the third link are rotatably connected to the first pivot point, and the perpendicular line connecting the first pivot point and the first central axis is the first connecting line; the first extension is rotatably connected to the first link at the second pivot point. When the frame is in the deployed state, the second pivot point is located on the side of the first connecting line closer to the second bracket; and / or, When the frame is in the unfolded state, the second pivot point is located in the first position. When the push rod rotates the preset distance, the second pivot point is located in the second position. The first position and the second position are symmetrical about the first line.

6. The vehicle according to claim 5, characterized in that, The perpendicular line connecting the second pivot point and the first central axis is the second connecting line; Both the second bracket and the third connecting rod rotate around the third pivot point, and the perpendicular line connecting the third pivot point and the first central axis is the third connecting line; When the frame is in the unfolded state, the first connecting line and the second connecting line form a first preset angle, and the first connecting line and the third connecting line form a second preset angle, wherein the second preset angle is greater than the first preset angle; and / or When the vehicle frame is in the unfolded state, the first connecting line and the second connecting line form a first preset angle, wherein the first preset angle is ≤30°; and / or, After the push rod rotates the preset distance toward the second bracket, the second pivot point passes the second position and moves upward as the push rod rotates, causing the first bracket and the second bracket to move closer together via the second connecting rod and the third connecting rod; and / or, When the frame is in the unfolded state, the second link and the third link are collinear, and the first bracket, the second bracket, the second link, and the third link form a triangular structure.

7. The vehicle according to any one of claims 1-6, characterized in that, The seat assembly is connected to the first bracket and / or the second bracket; the linkage assembly includes a second linkage assembly, which is connected between the seat assembly and the first bracket and / or the second bracket. After the push rod moves a preset distance, it drives the first bracket and the second bracket to move closer together. The first bracket and / or the second bracket drive the seat assembly and the frame to move closer together through the second linkage assembly.

8. The vehicle according to claim 7, characterized in that, Both the first bracket and the second bracket are rotatable about the first central axis; The seat assembly is rotatably connected to the first bracket; The second linkage component includes: The fourth link, the first end of which is rotatably connected to the seat assembly; The fifth link has its first end rotatably connected to the second end of the fourth link, and its second end rotatably connected to the first bracket. A traction rod, the first end of which is rotatably connected to the second bracket, and the second end of the traction rod, the second end of the fourth connecting rod, and the first end of the fifth connecting rod are rotatably connected; The first central axis and the rotation center of the first end of the traction rod are spaced apart; the first central axis, the rotation center of the seat assembly and the first bracket, and the rotation center of the first end of the fourth connecting rod are spaced apart.

9. The vehicle according to claim 8, characterized in that, The traction rod, the fourth connecting rod, and the fifth connecting rod are rotatably connected to the fourth pivot point, and the perpendicular line between the fourth pivot point and the first central axis is the fourth connecting line; The fifth link and the first bracket are rotatably connected at the fifth pivot point, and the line perpendicular to the fifth pivot point and the first central axis is the fifth line. When the vehicle frame is in the unfolded state, the rotation center of the first end of the traction rod is located on the side of the fourth connecting line closer to the fifth connecting line; The traction rod and the second bracket are rotatably connected at the sixth pivot point, and the vertical line connecting the sixth pivot point and the first central axis is the sixth line. When the vehicle frame is in the unfolded state, the fourth line and the sixth line form an angle γ, and the fourth line and the fifth line form an angle θ. Where γ is less than θ; and / or γ ≤ 20°.

10. The vehicle according to claim 8, characterized in that, When the frame is in the unfolded state, the fourth link and the fifth link are collinear; the seat assembly, the first bracket, the fourth link, and the fifth link form a triangular structure; and / or, The seat assembly includes a support base and a seat pocket disposed on the support base. One end of the support base is rotatably connected to the first bracket, and the other end of the support base is rotatably connected to the fourth link. The seat is rotatably connected to the support base around the second central axis, which extends vertically or forms a third preset angle with the vertical direction.

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