Frame and child's carriage

Abstract

The application discloses a kind of frame and child stroller, it is related to children's product technical field, wherein, frame has unfolded state and folding state, including front support, rear support, push rod and seat rod;Two components in three components of front support, rear support and push rod are rotationally connected, and third component is rotationally connected with at least one component in the aforementioned two components;Seat rod is rotationally installed on rear support by third pivot, and frame further includes linkage mechanism, linkage mechanism includes first linkage assembly, and two ends of first linkage assembly are movably connected to push rod and rear support respectively, and linkage mechanism further has first swing bar movably connected with first linkage assembly and seat rod respectively;First swing bar is rotationally connected with seat rod by first pivot, and first pivot is oppositely arranged at the rear side of third pivot;When push rod is close to rear support, first linkage assembly drives third pivot to move upward to overturn seat rod by first swing bar.The application provides a kind of fully foldable frame.

Description

Technical Field

[0001] This invention relates to the field of children's products technology, and in particular to a frame and a stroller. Background Technology

[0002] Existing strollers include a stroller frame with unfolded and folded states, a seat bar set on the stroller frame, and other structures. During the folding process, the current stroller frame usually causes the side of the seat bar connected to the backrest to flip downwards, resulting in the backrest occupying a high height after folding, which leads to a large volume after folding and makes it impossible to carry on an airplane. Summary of the Invention

[0003] The main objective of this invention is to provide a frame and stroller, which is designed to provide a fully foldable frame.

[0004] To achieve the above objectives, the present invention proposes a frame having an unfolded state and a folded state, including a front support, a rear support, a push rod, and a seat post. Two of the three components, namely the front support, the rear support, and the push rod, are rotatably connected, and the third component is rotatably connected to at least one of the aforementioned two components.

[0005] The seat post is rotatably mounted on the rear support via a third pivot. The frame also includes a linkage mechanism, which includes a first linkage component. The two ends of the first linkage component are movably connected to the push rod and the rear support, respectively. The linkage mechanism also has a first swing arm that is movably connected to the first linkage component and the seat post, respectively. The first swing arm is rotatably connected to the seat post via a first pivot, which is positioned opposite to the rear side of the third pivot.

[0006] As the push rod approaches the rear support, the first linkage assembly drives the third rotating shaft to move upward via the first swing arm to flip the seat post.

[0007] In one embodiment, the first linkage component includes:

[0008] A first support rod, one end of which is rotatably connected to the push rod;

[0009] The second support rod has one end rotatably connected to the end of the first support rod away from the push rod, and the other end rotatably connected to the rear bracket; one end of the first swing rod is rotatably connected to the second support rod through the second pivot.

[0010] In one embodiment, the first support rod is rotatably connected to the push rod via a sixth pivot, the second support rod is rotatably connected to the first support rod via a seventh pivot, and the second support rod is rotatably connected to the rear bracket via an eighth pivot, wherein the seventh pivot is located in front of the line connecting the sixth pivot and the eighth pivot.

[0011] In one embodiment, the first rotating shaft is located in front of and above the second rotating shaft.

[0012] In one embodiment, the linkage mechanism further includes a second swing arm that is movably connected to the seat post and the front support respectively; the second swing arm is rotatably connected to the seat post via a fourth pivot, and the second swing arm is rotatably connected to the front support via a fifth pivot, the fourth pivot being disposed opposite to the rear side of the fifth pivot.

[0013] In one embodiment, the fourth pivot is located below and behind the fifth pivot.

[0014] In one embodiment, the upper part of the front bracket is rotatably connected to the upper part of the rear bracket, and the lower part of the push rod is rotatably connected to the upper part of the rear bracket.

[0015] In one embodiment, the upper part of the rear support is provided with a connecting rod, the front support is rotatably connected to one end of the connecting rod, and the push rod is rotatably connected to the other end of the connecting rod.

[0016] In one embodiment, the extension direction of the rear support is set at an angle to the extension direction of the connecting rod.

[0017] In one embodiment, the extension direction of the rear support is perpendicular to the extension direction of the connecting rod.

[0018] In one embodiment, the front bracket is rotatably connected to the rear bracket via a ninth pivot, and the push rod is rotatably connected to the rear bracket via a tenth pivot, the horizontal height of the tenth pivot being above the horizontal height of the ninth pivot.

[0019] The present invention also proposes a stroller, comprising a frame as described above, a backrest disposed on the frame, a front wheel assembly disposed on the lower part of the front support, and a rear wheel assembly disposed on the bottom of the rear support.

[0020] The technical solution of this invention uses a first linkage component movably connected to the push rod and the rear support, and a first swing arm rotatably connected to the first linkage component and the seat post. Thus, when the trolley frame switches from an unfolded state to a folded state, the push rod can be manually or otherwise pressed down, causing it to move towards the rear support under gravity. This drives the first linkage component to move relative to the push rod and the rear support. The movement of the first linkage component drives the end of the first swing arm rotatably connected to the first linkage component to move towards the rear support, thereby driving the seat post upwards. Simultaneously, the seat post moves the front support towards the rear support, completing the folding of the frame. During the folding process, the seat post can be more smoothly folded upwards under the action of the first linkage component and the first swing arm, achieving smooth folding of the frame and enabling rapid folding and unfolding of the frame.

[0021] Therefore, because the seat post flips upwards during the folding process, that is, the side of the seat post that connects to the backrest flips upwards, the backrest does not touch the ground after folding. This eliminates the need to break or slide the backrest and reduces the space occupied by the backrest in the height direction, so that the frame is smaller after folding and achieves a fully folded effect, making it suitable for carrying on airplanes. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A side view of an embodiment of the vehicle frame provided by the present invention in an unfolded state;

[0024] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 3 A side view of an embodiment of the vehicle frame provided by the present invention during the folding process;

[0026] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0027] Figure 5 A side view of an embodiment of the vehicle frame provided by the present invention in a folded state;

[0028] Figure 6 A schematic diagram of the structure of a vehicle frame provided by the present invention in the unfolded state when a backrest is installed;

[0029] Figure 7 for Figure 6 A magnified view of a section at point C;

[0030] Figure 8 A schematic diagram of the structure of a vehicle frame provided by the present invention in a folded state when a backrest is installed;

[0031] Figure 9 A schematic diagram of the structure of another embodiment of the vehicle frame provided by the present invention in the unfolded state when a backrest is installed;

[0032] Figure 10 This is a schematic diagram of the structure of another embodiment of the vehicle frame provided by the present invention in a folded state when a backrest is installed.

[0033] Explanation of icon numbers:

[0034] 100. Frame; 11. Front support; 12. Rear support; 121. Linkage rod; 13. Push rod; 131. Lower push rod; 132. Upper push rod; 10. Linkage mechanism; 14. First linkage assembly; 141. First support rod; 142. Second support rod; 151. First swing rod; 152. Second swing rod; 20. Seat post; 31. First pivot; 32. Second pivot; 33. Third pivot; 34. Fourth pivot; 35. Fifth pivot; 36. Sixth pivot; 37. Seventh pivot; 38. Eighth pivot; 39. Ninth pivot; 310. Tenth pivot; 311. Eleventh pivot; 200. Backrest; 300. Front wheel assembly; 400. Rear wheel assembly.

[0035] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0039] Existing strollers include a stroller frame with unfolded and folded states, a seat bar set on the stroller frame, and other structures. During the folding process, the current stroller frame usually causes the side of the seat bar connected to the backrest to flip downwards, resulting in the backrest occupying a high height after folding, which leads to a large volume after folding and makes it impossible to carry on an airplane.

[0040] In view of the above problems, the present invention proposes a frame that is designed to be fully foldable.

[0041] Please see Figures 1 to 5 In one embodiment of the present invention, the frame 100 has an unfolded state and a folded state, including a front support 11, a rear support 12, a push rod 13 and a seat post 20; two of the three components of the front support 11, the rear support 12 and the push rod 13 are rotatably connected to each other, and the third component is rotatably connected to at least one of the aforementioned two components.

[0042] The seat post 20 is rotatably mounted on the rear support 12 via the third pivot 33. The frame 100 also includes a linkage mechanism 10, which includes a first linkage component 14. The two ends of the first linkage component 14 are movably connected to the push rod 13 and the rear support 12, respectively. The linkage mechanism 10 also has a first swing arm 151 that is movably connected to the first linkage component 14 and the seat post 20, respectively. The first swing arm 151 is rotatably connected to the seat post 20 via the first pivot 31, which is positioned opposite to the rear of the third pivot 33. When the push rod 13 moves toward the rear support 12, the first linkage component 14 drives the third pivot 33 to move upward via the first swing arm 151 to flip the seat post 20.

[0043] The technical solution of the present invention uses a first linkage component 14 movably connected to the push rod 13 and the rear support 12, and a first swing arm 151 rotatably connected to the first linkage component 14 and the seat post 20. Thus, when the frame 100 switches from an unfolded state to a folded state, the push rod 13 can be manually or otherwise pressed down, causing it to move towards the rear support 12 under gravity. This drives the first linkage component 14 to move relative to the push rod 13 and the rear support 12. The movement of the first linkage component 14 drives the end of the first swing arm 151 rotatably connected to the first linkage component 14 to move towards the rear support 12, thereby driving the seat post 20 to flip upwards. Simultaneously, the seat post 20 drives the front support 11 to move towards the rear support 12, thus completing the folding of the frame 100. During the folding process, the seat post 20 can flip upwards more smoothly under the action of the first linkage component 14 and the first swing arm 151, achieving a smooth folding of the frame 100, while also enabling rapid folding and unfolding of the frame 100.

[0044] Therefore, since the seat post 20 flips upward during the folding process, that is, the side of the seat post 20 that connects to the backrest 200 flips upward, the backrest 200 does not touch the ground after folding. Without interrupting or sliding the backrest 200, the space occupied by the backrest 200 in the height direction can be reduced, so that the frame 100 is smaller after folding, achieving a fully folded effect, and can be carried on airplanes.

[0045] In addition, by setting the first pivot 31 opposite to the rear of the third pivot 33, the lever effect of gravity can be increased during the folding process. This allows the first linkage component 14 to smoothly drive the third pivot 33 upward through the first swing arm 151 to flip the seat bar 20, thereby achieving an automatic folding effect.

[0046] In this embodiment, the front support 11, the rear support 12, and the push rod 13 are used to support the entire frame 100 to ensure the stability of the frame 100 in both unfolded and folded states, making it easier for the stroller to travel stably under various road conditions.

[0047] The function of the linkage mechanism 10 is to drive the seat post 20 to flip upward when the frame 100 switches from the unfolded state to the folded state, and to drive the seat post 20 to reset when the frame 100 switches from the folded state to the unfolded state, and to support the seat in a horizontal state through the seat post 20 for children to sit or lie down.

[0048] As examples, the frame 100 may also be provided with a switch structure to lock the frame 100 in an unfolded or folded state, or to unlock the frame 100 so that the frame 100 can switch between an unfolded and folded state.

[0049] It should be noted that when the frame 100 is in the unfolded state, the seat post 20 will maintain a certain distance from the front support 11 and the rear support 12, so that the seat plate mounted on the seat post 20 will also maintain a certain distance from the front support 11 and the rear support 12, allowing the child to sit or lie comfortably on the seat plate. When it is necessary to fold the frame 100, the operator can press the button of the switch structure. At this time, the linkage mechanism 10 will start working to drive the seat post 20 to flip upward and to bring the front support 11 and the push rod 13 closer to the rear support 12. During the folding process, the linkage mechanism 10 ensures that the movements of the seat post 20, the front support 11, the rear support 12, and the push rod 13 are coordinated, making the folding process smoother.

[0050] In practical applications, the front support 11, the rear support 12, and the push rod 13 can be rotatably connected by a connecting rod 121 or by a rotating joint.

[0051] In practical applications, the first linkage component 14 can rotate or slide relative to the push rod 13, or it can rotate or slide relative to the rear bracket 12.

[0052] In practical applications, the first linkage component 14 may include one, two, three, or more connecting rods, as long as the following conditions are met: when the frame 100 is in the unfolded state, the first linkage component 14 can support the push rod 13; when the frame 100 switches from the unfolded state to the folded state, the first linkage component 14 can move relative to the push rod 13 and the rear support 12; under the movement of the first linkage component 14, the end of the first swing rod 151 that is rotatably connected to the first linkage component 14 can be driven to move towards the rear support 12.

[0053] As examples, the first linkage assembly 14 and the push rod 13 can be connected by a quick-release structure to facilitate replacement or maintenance. Similarly, the first linkage assembly 14 and the rear bracket 12, the first swing rod 151 and the first linkage assembly 14, and the first swing rod 151 and the seat rod 20 can all be connected by a quick-release structure.

[0054] Please see Figure 1 , Figure 3 , Figure 6 , Figure 9 , Figure 10 In one embodiment of the present invention, the first linkage component 14 includes a first support rod 141 and a second support rod 142; one end of the first support rod 141 is rotatably connected to the push rod 13; one end of the second support rod 142 is rotatably connected to the end of the first support rod 141 away from the push rod 13, and the other end of the second support rod 142 is rotatably connected to the rear bracket 12; one end of the first swing rod 151 is rotatably connected to the second support rod 142 through the second rotating shaft 32.

[0055] With this configuration, the first linkage assembly 14 is formed by using the first support rod 141 and the second support rod 142. The two ends of the first support rod 141 are rotatably connected to the push rod 13 and the second support rod 142, respectively, and the two ends of the second support rod 142 are rotatably connected to the first support rod 141 and the rear support 12, respectively. In this way, during the folding process, the first linkage assembly 14 only needs to rotate to drive the push rod 13 to move closer to the rear support 12 and drive the first swing rod 151 to rotate, thereby driving the seat post 20 to flip upward to lift the seat plate installed on the seat post 20. There is no need to set up a sliding structure, which simplifies the structural design.

[0056] Optionally, the first support rod 141 can be long and rod-shaped, made of metal or high-strength plastic, with a rust-proof coating on the surface, thus ensuring the strength and service life of the first support rod 141. Similarly, the second support rod 142 can also be long and rod-shaped, made of metal or high-strength plastic, with a rust-proof coating on the surface, thus ensuring the strength and service life of the second support rod 142.

[0057] Optionally, the rotatable connection between the first support rod 141 and the push rod 13, and between the first swing rod 151 and the second support rod 142, can be an adjustable connection, making the first linkage assembly 14 more flexible during unfolding and folding.

[0058] Please see Figure 2 , Figure 4 , Figure 7 In one embodiment of the present invention, the first support rod 141 is rotatably connected to the push rod 13 via the sixth pivot 36, the second support rod 142 is rotatably connected to the first support rod 141 via the seventh pivot 37, and the second support rod 142 is rotatably connected to the rear bracket 12 via the eighth pivot 38. The seventh pivot 37 is located in front of the line connecting the sixth pivot 36 and the eighth pivot 38.

[0059] With this configuration, when the frame 100 is switched from the unfolded state to the folded state, the push rod 13 can be pressed down manually or by other means. Under the action of gravity, the push rod 13 moves closer to the rear support 12, thereby driving one end of the first support rod 141 and one end of the second support rod 142 to rotate relative to each other along the seventh pivot 37. Since the seventh pivot 37 is located in front of the line connecting the sixth pivot 36 and the eighth pivot 38, the seventh pivot 37 can move closer to the rear support 12, while simultaneously driving the other end of the first support rod 141 to rotate along the sixth pivot 36 and the other end of the second support rod 142 to rotate along the eighth pivot 38, thus smoothly driving the push rod 13 to move closer to the rear support 12.

[0060] As an example, one end of the first swing arm 151 can be rotatably connected to the second support rod 142 via the second pivot 32, so that when the second support rod 142 rotates, it can smoothly drive the first swing arm 151 to rotate, thereby smoothly driving the seat rod 20 to flip upward.

[0061] In practical applications, the sixth rotating shaft 36 can be a separate structure, with both ends inserted into the connecting holes of the first support rod 141 and the push rod 13, respectively; alternatively, one end of the sixth rotating shaft 36 can be directly connected to the first support rod 141 or the push rod 13, so that the other end of the sixth rotating shaft 36 is inserted into the connecting hole of the push rod 13 or the first support rod 141. Similarly, the seventh rotating shaft 37 and the eighth rotating shaft 38 can be separate structures, or directly connected to one of the structures, and the specifics will not be elaborated further.

[0062] Please see Figure 2 , Figure 4 In one embodiment of the present invention, the first rotating shaft 31 is located in front of and above the second rotating shaft 32. That is, the first rotating shaft 31 is located in front of the second rotating shaft 32, and the horizontal height of the first rotating shaft 31 is above the horizontal height of the second rotating shaft 32.

[0063] With this configuration, when the frame 100 switches from the unfolded state to the folded state, when the push rod 13 moves towards the rear support 12 under the action of gravity to drive the first linkage component 14 to move relative to the push rod 13 and the rear support 12, the first linkage component 14 can drive one end of the first swing rod 151 to rotate along the second pivot 32 and make the second pivot 32 move towards the rear support 12. At this time, since the first pivot 31 is located in front of and above the second pivot 32, the other end of the first swing rod 151 will rotate counterclockwise along the first pivot 31, which can smoothly drive the seat post 20 to flip upward. In this way, the upward flipping of the seat post 20 and the smooth folding of the frame 100 can be achieved with fewer connecting rods.

[0064] It should be noted that the horizontal height of the first rotating shaft 31 is above the horizontal height of the second rotating shaft 32, which means that the horizontal height of the center line of the first rotating shaft 31 is above the horizontal height of the center line of the second rotating shaft 32.

[0065] Please see Figures 1 to 5 In one embodiment of the present invention, the linkage mechanism 10 further includes a second swing arm 152 that is movably connected to the seat post 20 and the front support 11 respectively; the second swing arm 152 is rotatably connected to the seat post 20 via a fourth pivot 34 and rotatably connected to the front support 11 via a fifth pivot 35, with the fourth pivot 34 disposed opposite to the rear side of the fifth pivot 35.

[0066] With this configuration, by positioning the fourth pivot 34 relative to the rear of the fifth pivot 35, the seat post 20 can drive the end of the second swing arm 152 that is rotatably connected to the front support 11 to move closer to the rear support 12 during the upward flipping process, so as to smoothly drive the front support 11 to move closer to the rear support 12, while making the arrangement of each structure more compact.

[0067] In practical applications, the fourth pivot 34 can be a separate structure, with both ends inserted into the connection holes of the second rocker arm 152 and the seat arm 20, respectively; alternatively, one end of the fourth pivot 34 can be directly connected to the second rocker arm 152 or the seat arm 20, so that the other end of the fourth pivot 34 is inserted into the connection hole of the seat arm 20 or the second rocker arm 152. Similarly, the fifth pivot 35 can be a separate structure, with both ends inserted into the connection holes of the second rocker arm 152 and the front support 11, respectively; alternatively, one end of the fifth pivot 35 can be directly connected to the second rocker arm 152 or the front support 11, so that the other end of the fifth pivot 35 is inserted into the connection hole of the front support 11 or the second rocker arm 152.

[0068] As examples, the fourth pivot 34 can employ a self-lubricating bearing design to reduce friction when the second pivot 152 rotates relative to the seat 20, thereby improving motion efficiency. Similarly, the fifth pivot 35 can also employ a self-lubricating bearing design to reduce friction when the second pivot 152 rotates relative to the front support 11, thereby improving motion efficiency.

[0069] As examples, the extension directions of the first rotating shaft 31, the second rotating shaft 32, the third rotating shaft 33, the fourth rotating shaft 34, and the fifth rotating shaft 35 are arranged in parallel, which makes the movement process smoother.

[0070] As examples, the front support 11 can be a U-shaped tubular structure with symmetrical ends, the rear support 12 can be an H-shaped tubular structure with symmetrical ends, the push rod 13 can also be a U-shaped tubular structure with symmetrical ends, and the seat post 20 can also be a U-shaped tubular structure with symmetrical ends. Thus, there are two of each of the first linkage assembly 14, the first swing rod 151, and the second swing rod 152, and both of them are symmetrical. This allows the frame 100 to be folded using two of these components, further improving its folding stability.

[0071] In practical applications, the length and shape of the first pendulum 151 and the second pendulum 152 may be the same or different.

[0072] In practical applications, the first swing arm 151 and the first linkage assembly 14 can be rotatably connected by a pivot shaft or by a ball joint. Similarly, the first swing arm 151 and the seat arm 20, the second swing arm 152 and the front support 11, and the second swing arm 152 and the seat arm 20 can be rotatably connected by a pivot shaft or by a ball joint.

[0073] As examples, the first linkage component 14, the first swing arm 151, and the second swing arm 152 of the linkage mechanism 10 may be made of stainless steel to give the linkage mechanism 10 high strength and stability, thereby ensuring the service life of the linkage mechanism 10.

[0074] Please see Figures 1 to 5 In one embodiment of the present invention, the upper part of the front bracket 11 is rotatably connected to the upper part of the rear bracket 12, and the lower part of the push rod 13 is rotatably connected to the upper part of the rear bracket 12.

[0075] This design makes it easier to connect the front support 11 and the rear support 12, as well as the push rod 13 and the rear support 12. During the folding process, the rear support 12 can be used as an intermediate part so that both the front support 11 and the push rod 13 can move closer to the rear support 12 to achieve folding.

[0076] In practical applications, the front bracket 11 and the rear bracket 12 can be rotatably connected using a rotating connection part, which can be a thread, bearing, shaft, or other rotatable connection structure. Similarly, the push rod 13 and the rear bracket 12 are also rotatably connected using a rotating connection part, which can be a thread, bearing, shaft, or other rotatable connection structure.

[0077] Please see Figures 1 to 5 In one embodiment of the present invention, a connecting rod 121 is provided on the upper part of the rear bracket 12, the front bracket 11 is rotatably connected to one end of the connecting rod 121, and the push rod 13 is rotatably connected to the other end of the connecting rod 121.

[0078] This configuration, by using the connecting rod 121 to achieve the rotatable connection between the front bracket 11 and the rear bracket 12, and the rotatable connection between the push rod 13 and the rear bracket 12, makes it easier to assemble the front bracket 11 and the rear bracket 12, and also makes it easier to assemble the push rod 13 and the rear bracket 12.

[0079] In practical applications, the connecting rod 121 and the rear bracket 12 can be an integrally formed structure, or the connecting rod 121 can be connected to the rear bracket 12 by means of screws, clips, adhesives, etc., to ensure the reliability of the connection between the connecting rod 121 and the rear bracket 12.

[0080] In practical applications, the extension direction of the connecting rod 121 can be consistent with the extension direction of the rear bracket 12, or it can be set at an angle to the extension direction of the rear bracket 12.

[0081] As some examples, the connecting rod 121 can be in the form of a long strip plate, and its material can be metal or high-strength plastic, with a rust-proof coating on the surface to ensure the strength and service life of the connecting rod 121.

[0082] Please see Figures 1 to 5 In one embodiment of the present invention, the extension direction of the rear bracket 12 is set at an angle to the extension direction of the connecting rod 121.

[0083] With this configuration, in the folded state, the front support 11 and push rod 13 can be folded onto opposite sides of the rear support 12, so that the front support 11 and push rod 13 can be brought as close as possible to the rear support 12, making the folded frame 100 smaller in size; while in the unfolded state, the front support 11 and push rod 13 can be placed on almost the same inclined plane, so that the frame 100 can be more stably unfolded.

[0084] In practical applications, the extension direction of the rear bracket 12 and the extension direction of the connecting rod 121 can be set at an acute angle, an obtuse angle, or perpendicular to each other.

[0085] Please see Figures 1 to 5 , Figure 8 In one embodiment of the present invention, the extension direction of the rear support 12 is perpendicular to the extension direction of the connecting rod 121.

[0086] With this configuration, in the folded state, not only can the front support 11 and push rod 13 be folded to opposite sides of the rear support 12, but the extension direction of the connecting rod 121 can also be parallel to the horizontal plane, which can further reduce the volume of the folded frame 100.

[0087] Please see Figure 2 , Figure 4 In one embodiment of the present invention, the front bracket 11 is rotatably connected to the rear bracket 12 via the ninth pivot 39, and the push rod 13 is rotatably connected to the rear bracket 12 via the tenth pivot 310, the horizontal height of the tenth pivot 310 being above the horizontal height of the ninth pivot 39.

[0088] With this configuration, the push rod 13 can be positioned diagonally above the front support 11 in the unfolded state, which allows the frame 100 to be in the unfolded state more stably.

[0089] It should be noted that the horizontal height of the tenth rotating shaft 310 is above the horizontal height of the ninth rotating shaft 39, which means that in the unfolded state, the horizontal height of the center line of the tenth rotating shaft 310 is above the horizontal height of the center line of the ninth rotating shaft 39.

[0090] In practical applications, the ninth rotating shaft 39 can be a separate structure, with both ends inserted into the connection holes of the front bracket 11 and the rear bracket 12, respectively; alternatively, one end of the ninth rotating shaft 39 can be directly connected to the front bracket 11 or the rear bracket 12, so that the other end of the ninth rotating shaft 39 is inserted into the connection hole of the rear bracket 12 or the front bracket 11. Similarly, the tenth rotating shaft 310 can be a separate structure or directly connected to one of the structures, and the specifics will not be elaborated further.

[0091] As examples, the extension directions of the first rotating shaft 31, the second rotating shaft 32, the third rotating shaft 33, the fourth rotating shaft 34, the fifth rotating shaft 35, the sixth rotating shaft 36, the seventh rotating shaft 37, the eighth rotating shaft 38, the ninth rotating shaft 39, and the tenth rotating shaft 310 are arranged in parallel, which can make the movement process smoother.

[0092] Please see Figure 1 In one embodiment of the present invention, the push rod 13 includes a lower push rod 131 and an upper push rod 132; the lower part of the lower push rod 131 is rotatably connected to the rear support 12, and one end of the first linkage assembly 14 is rotatably connected to the lower push rod 131; the lower part of the upper push rod 132 is rotatably connected to the upper part of the lower push rod 131; when the frame 100 switches from the unfolded state to the folded state, the upper push rod 132 flips forward to move closer to the lower push rod 131, and the lower push rod 131 drives the upper push rod 132 to move closer to the rear support 12.

[0093] With this configuration, when the frame 100 is switched from the unfolded state to the folded state, the upper push rod 132 can be flipped forward manually or mechanically to bring the upper push rod 132 closer to the lower push rod 131. Then, by pressing down the upper push rod 132, the upper push rod 132 and the lower push rod 131 can be brought closer to the rear support 12 under the action of gravity. In this way, in the folded state, the space occupied by the push rod 13 in terms of height can be shortened, which can further reduce the volume of the frame 100.

[0094] As examples, in order to ensure the stability of the rotational connection between the upper push rod 132 and the lower push rod 131, the upper push rod 132 can be rotatably connected to the lower push rod 131 via the eleventh rotating shaft 311.

[0095] Please see Figures 6 to 10The present invention also proposes a stroller, which includes a frame 100, a backrest 200 disposed on the frame 100, a front wheel assembly 300 disposed on the lower part of the front support 11, and a rear wheel assembly 400 disposed on the bottom of the rear support 12. The specific structure of the frame 100 is as described in the above embodiments. Since the stroller adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0096] When the stroller is switched from the unfolded state to the folded state, the upper push rod 132 can be flipped forward manually or by other means to bring it closer to the lower push rod 131. Then, the upper push rod 132 can be pressed down, causing the upper push rod 132 and the lower push rod 131 to move towards the rear support 12 under the action of gravity. This drives the first support rod 141 and the second support rod 142 to rotate relative to the lower push rod 131 and the rear support 12, respectively. The rotation of the second support rod 142 causes the end of the first swing rod 151 that is rotatably connected to the second support rod 142 to move towards the rear support 12. This drives the seat rod 20 to flip upward through the first swing rod 151. During the upward flipping process, the seat rod 20 can drive the second swing rod 152 to rotate, which in turn drives the front support 11 to move towards the rear support 12, thereby completing the folding of the frame 100. During the upward flipping process, the seat post 20 can cause the side of the backrest 200 connected to the seat post 20 to flip upward, so that the folded backrest 200 does not touch the ground. There is no need to break or slide the backrest 200, which can also reduce the space occupied by the backrest 200 in the height direction, so that the frame 100 is smaller in size after folding, achieving a fully folded effect, and can be carried on airplanes.

[0097] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A vehicle frame having an unfolded state and a folded state, characterized in that, Includes front support, rear support, push rod, and seat post; Two of the three components—the front support, the rear support, and the push rod—are rotatably connected, and the third component is rotatably connected to at least one of the aforementioned two components. The seat post is rotatably mounted on the rear support via a third pivot. The frame also includes a linkage mechanism, which includes a first linkage component. The two ends of the first linkage component are movably connected to the push rod and the rear support, respectively. The linkage mechanism also has a first swing arm that is movably connected to the first linkage component and the seat post, respectively. The first swing arm is rotatably connected to the seat post via a first pivot, which is positioned opposite to the rear side of the third pivot. When the push rod moves toward the rear support, the first linkage component drives the third rotating shaft to move upward via the first swing rod to flip the seat post; The first linkage component includes: A first support rod, one end of which is rotatably connected to the push rod; The second support rod has one end rotatably connected to the end of the first support rod away from the push rod, and the other end rotatably connected to the rear bracket; one end of the first swing rod is rotatably connected to the second support rod via a second pivot. The linkage mechanism also has a second swing arm that is movably connected to the seat post and the front support respectively; the second swing arm is rotatably connected to the seat post via a fourth pivot, and the second swing arm is rotatably connected to the front support via a fifth pivot, the fourth pivot being disposed opposite to the rear side of the fifth pivot; the fourth pivot is located below and behind the fifth pivot.

2. The frame as described in claim 1, characterized in that, The first support rod is rotatably connected to the push rod via a sixth pivot, the second support rod is rotatably connected to the first support rod via a seventh pivot, and the second support rod is rotatably connected to the rear bracket via an eighth pivot. The seventh pivot is located in front of the line connecting the sixth pivot and the eighth pivot.

3. The frame as described in claim 1, characterized in that, The first rotating shaft is located in front of and above the second rotating shaft.

4. The frame as described in any one of claims 1 to 3, characterized in that, The upper part of the front bracket is rotatably connected to the upper part of the rear bracket, and the lower part of the push rod is rotatably connected to the upper part of the rear bracket.

5. The frame as described in claim 4, characterized in that, The upper part of the rear support is provided with a connecting rod, the front support is rotatably connected to one end of the connecting rod, and the push rod is rotatably connected to the other end of the connecting rod; The extension direction of the rear support is set at an angle to the extension direction of the connecting rod.

6. The frame as described in claim 5, characterized in that, The extension direction of the rear support is perpendicular to the extension direction of the connecting rod.

7. The frame as described in any one of claims 1 to 3, characterized in that, The front bracket is rotatably connected to the rear bracket via a ninth pivot, and the push rod is rotatably connected to the rear bracket via a tenth pivot, the tenth pivot being located above and behind the ninth pivot.

8. A children's stroller, characterized in that, It includes a frame as described in any one of claims 1 to 7, a backrest disposed on the frame, a front wheel assembly disposed on the lower part of the front support, and a rear wheel assembly disposed on the bottom of the rear support.

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