Frame and stroller

Abstract

The invention discloses a frame and a stroller, and relates to the technical field of children products, the frame has an unfolded state and a folded state, and comprises a front support, a rear support, a push rod and a seat rod; two of the front bracket, the rear bracket and the push rod are rotationally connected, and the third part is rotationally connected with at least one of the two parts; the seat rod is rotatably installed on the rear support through a third rotating shaft, the frame further comprises a linkage mechanism, the linkage mechanism comprises a first linkage assembly, the two ends of the first linkage assembly are movably connected to the push rod and the rear support respectively, and the linkage mechanism is further provided with a first swing rod movably connected with the first linkage assembly and the seat rod respectively; the first swing rod is rotationally connected with the seat rod through a first rotating shaft; the first rotating shaft is oppositely arranged on the rear side of the third rotating shaft; when the push rod gets close to the rear support, the first linkage assembly drives the third rotating shaft to move upwards through the first swing rod so as to turn over the seat rod. The invention provides a frame capable of being fully folded.

Description

Technical Field

[0001] The present invention relates to the technical field of children's products, and in particular to a frame and a child stroller. Background Art

[0002] The prior art stroller includes a stroller frame with unfolded and folded states, a seat rod arranged on the stroller frame and other structures. During the folding process, the current stroller frame usually drives the side of the seat rod connected to the backrest to flip downward, so that the folded backrest occupies a higher height, resulting in a larger volume after folding, and cannot be carried on an airplane. Summary of the invention

[0003] The main purpose of the present invention is to provide a frame and a child stroller, aiming to provide a fully foldable frame.

[0004] To achieve the above object, the present invention provides a bicycle frame having an unfolded state and a folded state, comprising a front bracket, a rear bracket, a push rod and a seat rod, wherein two of the three components of the front bracket, the rear bracket and the push rod are rotatably connected, and the third component is rotatably connected to at least one of the two components;

[0005] The seat post is rotatably mounted on the rear bracket via a third rotating shaft, the frame further comprises a linkage mechanism, the linkage mechanism comprises a first linkage assembly, both ends of the first linkage assembly are movably connected to the push rod and the rear bracket respectively, the linkage mechanism further comprises a first swing arm movably connected to the first linkage assembly and the seat post respectively; the first swing arm is rotatably connected to the seat post via a first rotating shaft, the first rotating shaft is relatively arranged at the rear side of the third rotating shaft;

[0006] When the push rod moves toward the rear bracket, the first linkage assembly drives the third rotating shaft to move upward through the first swing rod to flip the seat rod.

[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] A second support rod, one end of the second support rod is rotatably connected to an end of the first support rod away from the push rod, and the other end of the second support rod is rotatably connected to the rear bracket; one end of the first swing rod is rotatably connected to the second support rod through the second rotating shaft.

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

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

[0012] In one embodiment, the linkage mechanism also has a second rocker arm movably connected to the seat rod and the front bracket respectively; the second rocker arm is rotationally connected to the seat rod via a fourth rotating shaft, and the second rocker arm is rotationally connected to the front bracket via a fifth rotating shaft, and the fourth rotating shaft is relatively arranged on the rear side of the fifth rotating shaft.

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

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

[0015] In one embodiment, a connecting rod is provided on the upper portion of the rear bracket, the front bracket 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, an extension direction of the rear bracket and an extension direction of the connecting rod are arranged at an angle.

[0017] In one embodiment, an extending direction of the rear bracket is perpendicular to an extending direction of the connecting rod.

[0018] In one embodiment, the front bracket is rotatably connected to the rear bracket via a ninth rotating shaft, the push rod is rotatably connected to the rear bracket via a tenth rotating shaft, and the level of the tenth rotating shaft is above the level of the ninth rotating shaft.

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

[0020] The technical solution of the present invention is to use a first linkage component to be movably connected to the push rod and the rear bracket, and to use a first swing rod to be rotationally connected to the first linkage component and the seat rod; in this way, when the stroller frame is switched from the unfolded state to the folded state, the push rod can be pressed down manually or in other ways to make the push rod move closer to the rear bracket under the action of gravity, so as to drive the first linkage component to move relative to the push rod and the rear bracket. Under the activity of the first linkage component, the end of the first swing rod rotationally connected to the first linkage component can be driven to move closer to the rear bracket, so as to drive the seat rod to flip upward through the first swing rod, and at the same time drive the front bracket to move closer to the rear bracket through the seat rod, thereby completing the folding of the frame. In this way, during the folding process, the seat rod can be more smoothly flipped upward under the action of the first linkage component and the first swing rod, and the smooth folding of the frame can be achieved, and the rapid folding and unfolding of the frame can be achieved.

[0021] Therefore, since the seat post flips upward during the folding process, that is, the side of the seat post connected to the backrest flips upward, the folded backrest does not touch the ground, there is no need to break or slide the backrest, and the space occupied by the backrest in the height direction can be reduced, so that the volume of the frame after folding is smaller, the effect of full folding is achieved, and it can be carried on an airplane. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

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

[0024] Figure 2 for Figure 1 A partial enlarged view of the middle A;

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

[0026] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

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

[0028] Figure 6 A schematic diagram of the structure of a frame according to an embodiment of the present invention when a backrest is installed in an unfolded state;

[0029] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0030] Figure 8 A schematic diagram of the structure of a frame according to an embodiment of the present invention when a backrest is installed in a folded state;

[0031] Fig. 9 A schematic structural diagram of another embodiment of the frame provided by the present invention when a backrest is installed in an unfolded state;

[0032] Fig.10 A schematic structural diagram of another embodiment of the frame provided by the present invention when a backrest is installed in a folded state.

[0033] Description of Figure Numbers:

[0034] 100, frame; 11, front bracket; 12, rear bracket; 121, connecting 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 rod; 31, first rotating shaft; 32, second rotating shaft; 33, third rotating shaft; 34, fourth rotating shaft; 35, fifth rotating shaft; 36, sixth rotating shaft; 37, seventh rotating shaft; 38, eighth rotating shaft; 39, ninth rotating shaft; 310, tenth rotating shaft; 311, eleventh rotating shaft; 200, backrest; 300, front wheel assembly; 400, rear wheel assembly.

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

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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 position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The prior art stroller includes a stroller frame with unfolded and folded states, a seat rod arranged on the stroller frame and other structures. During the folding process, the current stroller frame usually drives the side of the seat rod connected to the backrest to flip downward, so that the folded backrest occupies a higher height, resulting in a larger volume after folding, and cannot be carried on an airplane.

[0040] Based on the above problems, the present invention proposes a bicycle frame, aiming to provide a fully foldable bicycle frame.

[0041] See also Figures 1 to 5 In one embodiment of the present invention, the frame 100 has an unfolded state and a folded state, and includes a front bracket 11, a rear bracket 12, a push rod 13 and a seat post 20; two of the three components of the front bracket 11, the rear bracket 12 and the push rod 13 are rotatably connected, and the third component is rotatably connected to at least one of the two components;

[0042] The seat post 20 is rotatably mounted on the rear bracket 12 via the third rotating shaft 33. The frame 100 further includes a linkage mechanism 10, which includes a first linkage assembly 14. Both ends of the first linkage assembly 14 are movably connected to the push rod 13 and the rear bracket 12, respectively. The linkage mechanism 10 further includes a first swing rod 151 movably connected to the first linkage assembly 14 and the seat post 20, respectively; the first swing rod 151 is rotatably connected to the seat post 20 via the first rotating shaft 31, and the first rotating shaft 31 is relatively arranged at the rear side of the third rotating shaft 33; when the push rod 13 moves toward the rear bracket 12, the first linkage assembly 14 drives the third rotating shaft 33 to move upward via the first swing rod 151 to flip the seat post 20.

[0043] The technical solution of the present invention is to use the first linkage assembly 14 to be movably connected to the push rod 13 and the rear bracket 12, and to use the first swing rod 151 to be rotatably connected to the first linkage assembly 14 and the seat rod 20; in this way, when the frame 100 is switched from the unfolded state to the folded state, the push rod 13 can be pressed down manually or in other ways, so that the push rod 13 is moved closer to the rear bracket 12 under the action of gravity, so as to drive the first linkage assembly 14 to move relative to the push rod 13 and the rear bracket 12, and under the activity of the first linkage assembly 14, one end of the first swing rod 151 rotatably connected to the first linkage assembly 14 can be driven to move closer to the rear bracket 12, so as to drive the seat rod 20 to flip upward through the first swing rod 151, and at the same time, the front bracket 11 is driven to move closer to the rear bracket 12 through the seat rod 20, so as to complete the folding of the frame 100. In this way, during the folding process, the seat rod 20 can be more smoothly flipped upward under the action of the first linkage assembly 14 and the first swing rod 151, and the frame 100 can be smoothly folded, and the frame 100 can be quickly folded and unfolded.

[0044] Therefore, since the seat post 20 flips upward during the folding process, that is, the side of the seat post 20 connected to the backrest 200 flips upward, the folded backrest 200 does not touch the ground, and there is no need to break or slide the backrest 200. The space occupied by the backrest 200 in the height direction can also be reduced, so that the volume of the frame 100 after folding is smaller, the effect of full folding is achieved, and it can be carried on an airplane.

[0045] In addition, by arranging the first rotating shaft 31 relatively to the rear side of the third rotating shaft 33, the lever of gravity can be increased during the folding process, so that when the push rod 13 moves toward the rear bracket 12, the first linkage assembly 14 can smoothly drive the third rotating shaft 33 to move upward through the first rocker rod 151 to flip the seat rod 20, thereby achieving an automatic folding effect.

[0046] In this embodiment, the front bracket 11, the rear bracket 12, and the push rod 13 are used to support the entire frame 100 to ensure the stability of the frame 100 whether in the unfolded state or the folded state, so as to facilitate the stable driving of the child stroller under various road conditions.

[0047] The linkage mechanism 10 drives the seat post 20 to flip upward when the vehicle frame 100 switches from the unfolded state to the folded state, and drives the seat post 20 to reset when the vehicle frame 100 switches from the folded state to the unfolded state, and supports the seat plate in a horizontal state through the seat post 20 for children to sit or lie on.

[0048] As some exemplary embodiments, the frame 100 may also be provided with a switch structure, so as to lock the frame 100 in the unfolded state or the folded state through the switch structure, or unlock the frame 100 so that the frame 100 can be switched between the unfolded state and the 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 installed on the seat post 20 maintains a certain distance from the front support 11 and the rear support 12, and the child can sit or lie on the seat plate comfortably. When the frame 100 needs to be folded up, the operator can press the button of the switch structure, and the linkage mechanism 10 starts to work to drive the seat post 20 to flip up and make the front support 11 and the push rod 13 move closer to the rear support 12. During the folding process, the linkage mechanism 10 can ensure the coordinated action between the seat post 20 and the front support 11, the rear support 12 and the push rod 13, making the folding process smoother.

[0050] In actual application, the front bracket 11, the rear bracket 12 and the push rod 13 can be rotatably connected by a connecting rod 121 or by a swivel joint.

[0051] In actual application, the first linkage assembly 14 can specifically rotate or slide relative to the push rod 13 , and can also rotate or slide relative to the rear bracket 12 .

[0052] In actual application, the first linkage component 14 can 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 push rod 13 can be supported by the first linkage component 14; when the frame 100 is switched from the unfolded state to the folded state, the first linkage component 14 can be moved relative to the push rod 13 and the rear bracket 12, and the movement of the first linkage component 14 can drive the end of the first swing arm 151 that is rotatably connected to the first linkage component 14 to move closer to the rear bracket 12.

[0053] As some 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] See also Figure 1 , Figure 3 , Figure 6 , Fig. 9 , Fig.10 In one embodiment of the present invention, the first linkage assembly 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 an 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] In this way, the first linkage assembly 14 is composed of the first support rod 141 and the second support rod 142, so that the two ends of the first support rod 141 are respectively rotatably connected to the push rod 13 and the second support rod 142, and the two ends of the second support rod 142 are respectively rotatably connected to the first support rod 141 and the rear bracket 12. 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 bracket 12, and drive the first swing rod 151 to rotate, thereby driving the seat rod 20 to flip upward to lift up the seat plate installed on the seat rod 20. There is no need to set a sliding structure, which can simplify the structural design.

[0056] Optionally, the first support rod 141 may be in the shape of a long rod, and its material may be metal or high-strength plastic, and its surface may be treated with an anti-rust coating, so as to ensure the use strength and service life of the first support rod 141. Similarly, the second support rod 142 may also be in the shape of a long rod, and its material may be metal or high-strength plastic, and its surface may be treated with an anti-rust coating, so as to ensure the use strength and service life of the second support rod 142.

[0057] Optionally, the rotational 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, so that the first linkage assembly 14 is more flexible during the unfolding and folding process.

[0058] See also 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 rotating shaft 36, the second support rod 142 is rotatably connected to the first support rod 141 via the seventh rotating shaft 37, the second support rod 142 is rotatably connected to the rear bracket 12 via the eighth rotating shaft 38, and the seventh rotating shaft 37 is located in front of the line connecting the sixth rotating shaft 36 and the eighth rotating shaft 38.

[0059] With such arrangement, when the vehicle frame 100 switches from the unfolded state to the folded state, the push rod 13 can be pressed down manually or in other ways, and the push rod 13 moves closer to the rear bracket 12 under the action of gravity, so as to drive 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 rotation axis 37. Since the seventh rotation axis 37 is located in front of the line connecting the sixth rotation axis 36 and the eighth rotation axis 38, the seventh rotation axis 37 can be moved closer to the rear bracket 12, and at the same time, the other end of the first support rod 141 can be driven to rotate along the sixth rotation axis 36, and the other end of the second support rod 142 can be driven to rotate along the eighth rotation axis 38, so that the push rod 13 can be smoothly driven to move closer to the rear bracket 12.

[0060] As some examples, one end of the first swing arm 151 can be rotatably connected to the second support rod 142 via the second rotating shaft 32, so that when the second support rod 142 rotates, it can smoothly drive the first swing arm 151 to rotate, and then smoothly drive the seat rod 20 to flip upward.

[0061] In actual application, the sixth rotating shaft 36 can be a separate structure, and the two ends of the sixth rotating shaft 36 are respectively inserted into the connecting holes of the first support rod 141 and the push rod 13; or, 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 a separate structure, or directly connected to one of the structures, and the details are not repeated one by one.

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

[0063] With such arrangement, when the frame 100 switches from the unfolded state to the folded state, when the push rod 13 moves toward the rear bracket 12 under the action of gravity to drive the first linkage assembly 14 to move relative to the push rod 13 and the rear bracket 12, the first linkage assembly 14 can drive one end of the first swing rod 151 to rotate along the second rotation axis 32 and make the second rotation axis 32 move toward the rear bracket 12. At this time, since the first rotation axis 31 is located above and in front of the second rotation axis 32, the other end of the first swing rod 151 will rotate counterclockwise along the first rotation axis 31, which can smoothly drive the seat post 20 to flip upward. In this way, a smaller number of connecting rods can be used to achieve the upward flipping of the seat post 20 and the smooth folding of the frame 100.

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

[0065] See also Figures 1 to 5 In one embodiment of the present invention, the linkage mechanism 10 further includes a second swing arm 152 movably connected to the seat rod 20 and the front bracket 11 respectively; the second swing arm 152 is rotatably connected to the seat rod 20 via a fourth rotating shaft 34, and the second swing arm 152 is rotatably connected to the front bracket 11 via a fifth rotating shaft 35, and the fourth rotating shaft 34 is relatively arranged on the rear side of the fifth rotating shaft 35.

[0066] In this way, by arranging the fourth rotating shaft 34 relatively to the rear side of the fifth rotating shaft 35, the seat post 20 can drive the end of the second swing arm 152 that is rotatably connected to the front bracket 11 to move closer to the rear bracket 12 during the upward flipping process, so as to smoothly drive the front bracket 11 to move closer to the rear bracket 12, and at the same time make the arrangement of various structures more compact.

[0067] In actual application, the fourth rotating shaft 34 can be a separate structure, and the two ends of the fourth rotating shaft 34 are respectively inserted into the connecting holes of the second swing rod 152 and the seat rod 20; or, one end of the fourth rotating shaft 34 can also be directly connected to the second swing rod 152 or the seat rod 20, so that the other end of the fourth rotating shaft 34 is inserted into the connecting hole of the seat rod 20 or the second swing rod 152. Similarly, the fifth rotating shaft 35 can be a separate structure, and the two ends of the fifth rotating shaft are respectively inserted into the connecting holes of the second swing rod 152 and the front bracket 11; or, one end of the fifth rotating shaft 35 can also be directly connected to the second swing rod 152 or the front bracket 11, so that the other end of the fifth rotating shaft 35 is inserted into the connecting hole of the front bracket 11 or the second swing rod 152.

[0068] As some examples, the fourth rotating shaft 34 may be designed with a self-lubricating bearing to reduce the friction when the second swing rod 152 rotates relative to the seat rod 20, thereby improving the movement efficiency. Similarly, the fifth rotating shaft 35 may also be designed with a self-lubricating bearing to reduce the friction when the second swing rod 152 rotates relative to the front bracket 11, thereby improving the movement efficiency.

[0069] As some exemplary examples, the extending 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 can make the movement process smoother.

[0070] As some examples, the front bracket 11 can be a U-shaped tubular structure, and the two free ends of the U-shaped tubular structure are symmetrical structures. The rear bracket 12 can be an H-shaped tubular structure, and the two long tubes of the H-shaped tubular structure are symmetrical structures. The push rod 13 can also be a U-shaped tubular structure, and the two free ends of the U-shaped tubular structure are symmetrical structures. The seat rod 20 can also be a U-shaped tubular structure, and the two free ends of the U-shaped tubular structure are symmetrical structures. In this way, two first linkage components 14, the first swing rod 151 and the second swing rod 152 are each provided, and the two first linkage components 14, the first swing rod 151 and the second swing rod 152 are all symmetrical structures. The two first linkage components 14, the first swing rod 151 and the second swing rod 152 are used to realize the folding of the frame 100, which can further improve the folding stability of the frame 100.

[0071] In actual application, the lengths and shapes of the first swing rod 151 and the second swing rod 152 may be the same or different.

[0072] In actual application, the first swing arm 151 and the first linkage assembly 14 can be connected to each other by a rotating shaft or a spherical joint. Similarly, the first swing arm 151 and the seat post 20, the second swing arm 152 and the front bracket 11, and the second swing arm 152 and the seat post 20 can be connected to each other by a rotating shaft or a spherical joint.

[0073] As some exemplary examples, the first linkage assembly 14 , the first swing rod 151 , and the second swing rod 152 of the linkage mechanism 10 may be made of stainless steel so that the linkage mechanism 10 has higher strength and stability to ensure the service life of the linkage mechanism 10 .

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

[0075] Such an arrangement makes it easier to achieve the connection between the front bracket 11 and the rear bracket 12, as well as the connection between the push rod 13 and the rear bracket 12. At the same time, during the folding process, the rear bracket 12 can be used as an intermediate piece so that the front bracket 11 and the push rod 13 can be moved closer to the rear bracket 12 to achieve folding.

[0076] In actual application, the front bracket 11 and the rear bracket 12 can be rotatably connected by a rotating connection part, which can be a thread, a bearing, a rotating shaft or other rotating connection structures. Similarly, the push rod 13 and the rear bracket 12 are also rotatably connected by a rotating connection part, which can be a thread, a bearing, a rotating shaft or other rotating connection structures.

[0077] See also Figures 1 to 5 In one embodiment of the present invention, a connecting rod 121 is provided on the upper portion 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] With such arrangement, by using the connecting rod 121 to realize the rotational connection between the front bracket 11 and the rear bracket 12, and to realize the rotational connection between the push rod 13 and the rear bracket 12, it is more convenient to realize the assembly between the front bracket 11 and the rear bracket 12, and it is more convenient to realize the assembly between the push rod 13 and the rear bracket 12.

[0079] In actual application, 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, snaps, bonding, etc. to ensure the connection reliability between the connecting rod 121 and the rear bracket 12.

[0080] In actual application, the extending direction of the connecting rod 121 may be consistent with the extending direction of the rear bracket 12 , or may be arranged at an angle to the extending direction of the rear bracket 12 .

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

[0082] See also Figures 1 to 5 In one embodiment of the present invention, the extension direction of the rear bracket 12 and the extension direction of the connecting rod 121 are arranged at an angle.

[0083] With such arrangement, in the folded state, the front bracket 11 and the push rod 13 can be folded on opposite sides of the rear bracket 12 respectively, so that the front bracket 11 and the push rod 13 can be as close to the rear bracket 12 as possible, and the volume of the folded frame 100 can be smaller; and in the unfolded state, the front bracket 11 and the push rod 13 can be almost on the same inclined plane, so that the frame 100 can be more stably in the unfolded state.

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

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

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

[0087] See also 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 rotating shaft 39, and the push rod 13 is rotatably connected to the rear bracket 12 via the tenth rotating shaft 310, and the horizontal height of the tenth rotating shaft 310 is located above the horizontal height of the ninth rotating shaft 39.

[0088] With such arrangement, the push rod 13 can be located obliquely above the front bracket 11 in the unfolded state, so that the frame 100 can be more stably in the unfolded state.

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

[0090] In actual application, the ninth rotating shaft 39 can be a separate structure, and the two ends of the ninth rotating shaft 39 are respectively inserted into the connection holes of the front bracket 11 and the rear bracket 12; or, one end of the ninth rotating shaft 39 can also 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 details are not repeated one by one.

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

[0092] See also 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 portion of the lower push rod 131 is rotatably connected to the rear bracket 12, and one end of the first linkage assembly 14 is rotatably connected to the lower push rod 131; the lower portion of the upper push rod 132 is rotatably connected to the upper portion of the lower push rod 131; when the frame 100 is switched 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 bracket 12.

[0093] With such arrangement, when the vehicle frame 100 switches from the unfolded state to the folded state, the upper push rod 132 can be flipped forward by manual or mechanical drive to make the upper push rod 132 move closer to the lower push rod 131, and then the upper push rod 132 is pressed downward to make the upper push rod 132 and the lower push rod 131 move closer to the rear bracket 12 under the action of gravity. In this way, in the folded state, the space occupied by the push rod 13 in height can be shortened, and the volume of the vehicle frame 100 can be further reduced.

[0094] As some 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 may be rotationally connected to the lower push rod 131 via an eleventh rotating shaft 311 .

[0095] See also Figures 6 to 10The present invention further provides a child stroller, which includes a frame 100, a backrest 200 arranged on the frame 100, a front wheel assembly 300 arranged at the lower part of the front bracket 11, and a rear wheel assembly 400 arranged at the bottom of the rear bracket 12. The specific structure of the frame 100 refers to the above embodiment. Since the child stroller adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[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 in other ways to make the upper push rod 132 move closer to the lower push rod 131, and then the upper push rod 132 can be pressed downward to make the upper push rod 132 and the lower push rod 131 move closer to the rear bracket 12 under the action of gravity, so as to drive the first support rod 141 and the second support rod 142 to rotate relative to the lower push rod 131 and the rear bracket 12 respectively, and under the rotation of the second support rod 142, the end of the first swing rod 151 and the second support rod 142 that is rotatably connected is driven to move closer to the rear bracket 12, so as to drive the seat rod 20 to flip upward through the first swing rod 151, and the seat rod 20 can drive the second swing rod 152 to rotate during the flipping process, so as to drive the front bracket 11 to move closer to the rear bracket 12 through the second swing rod 152, thereby completing the folding of the frame 100. Among them, the seat post 20 can drive the side of the backrest 200 connected to the seat post 20 to flip upward during the upward flipping process, so that the folded backrest 200 does not touch the ground, and there is no need to break or slide the backrest 200. The space occupied by the backrest 200 in the height direction can also be reduced, so that the volume of the frame 100 after folding is smaller, and the frame 100 has a fully folded effect and can be carried on an airplane.

[0097] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A frame having an unfolded state and a folded state, characterized in that: Includes front bracket, rear bracket, push rod and seat post; Two of the three components of the front bracket, the rear bracket and the push rod are rotatably connected, and the third component is rotatably connected to at least one of the two components; The seat post is rotatably mounted on the rear bracket via a third rotating shaft, the frame further comprises a linkage mechanism, the linkage mechanism comprises a first linkage assembly, two ends of the first linkage assembly are respectively movably connected to the push rod and the rear bracket, the linkage mechanism further comprises a first swing arm movably connected to the first linkage assembly and the seat post respectively; the first swing arm is rotatably connected to the seat post via a first rotating shaft, the first rotating shaft is relatively arranged at the rear side of the third rotating shaft; When the push rod moves toward the rear bracket, the first linkage assembly drives the third rotating shaft to move upward through the first swing rod to flip the seat rod.

2. The frame according to claim 1, characterized in that The first linkage component comprises: a first support rod, one end of which is rotatably connected to the push rod; A second support rod, one end of the second support rod is rotatably connected to an end of the first support rod away from the push rod, and the other end of the second support rod is rotatably connected to the rear bracket; one end of the first swing rod is rotatably connected to the second support rod through a second rotating shaft.

3. The frame according to claim 2, characterized in that: The first support rod is rotatably connected to the push rod via a sixth rotating shaft, the second support rod is rotatably connected to the first support rod via a seventh rotating shaft, the second support rod is rotatably connected to the rear bracket via an eighth rotating shaft, and the seventh rotating shaft is located in front of the line connecting the sixth rotating shaft and the eighth rotating shaft.

4. The frame according to claim 2, characterized in that: The first rotating shaft is located above and in front of the second rotating shaft.

5. The frame according to any one of claims 1 to 4, characterized in that The linkage mechanism further comprises a second swing arm movably connected to the seat post and the front bracket respectively; the second swing arm is rotatably connected to the seat post via a fourth rotating shaft, the second swing arm is rotatably connected to the front bracket via a fifth rotating shaft, and the fourth rotating shaft is relatively arranged at the rear side of the fifth rotating shaft; The fourth rotating shaft is located at the rear and lower part of the fifth rotating shaft.

6. The frame according to any one of claims 1 to 4, 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.

7. The frame according to claim 6, characterized in that: A connecting rod is provided on the upper part of the rear bracket, the front bracket 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 bracket is arranged at an angle to the extension direction of the connecting rod.

8. The frame according to claim 7, characterized in that: An extending direction of the rear bracket is perpendicular to an extending direction of the connecting rod.

9. The frame according to any one of claims 1 to 4, characterized in that The front bracket is rotatably connected to the rear bracket via a ninth rotating shaft, and the push rod is rotatably connected to the rear bracket via a tenth rotating shaft, and the tenth rotating shaft is located above and behind the ninth rotating shaft.

10. A baby stroller, characterized in that: The vehicle comprises a frame as claimed in any one of claims 1 to 9, a backrest arranged on the frame, a front wheel assembly arranged at the lower part of the front bracket, and a rear wheel assembly arranged at the bottom of the rear bracket.

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