Foldable baby stroller

Abstract

The present invention provides a foldable baby stroller, which has an unfolded state and a folded state. The foldable baby stroller comprises a frame body, a front wheel assembly arranged at the front of the frame body and comprising at least one front wheel, a rear wheel assembly arranged at the rear of the frame body and comprising at least two rear wheels, and a seat assembly arranged at the upper part of the frame body, wherein the frame body comprises: a head tube; at least one beam, the beam having a first end and a second end, the first end of the beam being pivotally connected to the head tube; at least one connecting head, the second end of the beam being pivotally connected to the connecting head; at least two rear fork rods, the rear fork rods having a first end and a second end, the first end of the rear fork rods being pivotally connected to the connecting head, and the second end of the rear fork rods being connected to the rear wheel assembly. The foldable baby stroller of the present invention does not need to disassemble parts when folding, can achieve "one-button" folding, and is more convenient and quick to operate. The foldable baby stroller is more compact after folding, and the longitudinal dimension can be significantly reduced.

Description

Technical Field

[0001] The present application relates to a baby carriage, and in particular to a foldable baby carriage. Background Art

[0002] Common children's vehicles (such as children's tricycles) on the market mainly include: a frame body, a front fork connected to the frame body, a front wheel mounted on the front fork, a rear wheel frame connected to both sides of the frame body, two rear wheels mounted on the rear wheel frame, a seat assembly arranged on the frame body, and a steering assembly arranged on the frame body. If necessary, a push rod assembly for adults can also be provided. The frame body of this children's tricycle cannot be folded, so its longitudinal dimension cannot be changed. Therefore, the volume of this children's tricycle is relatively large, which is very inconvenient in transportation and packaging. Some people have also developed foldable children's tricycles, but such children's tricycles often need to disassemble parts when folding, which is inconvenient to operate, and the volume after folding is still relatively large.

[0003] The Chinese patent CN105480342B filed by the applicant of the present application on April 13, 2016 and authorized relates to a foldable children's tricycle and a folding method thereof. This children's tricycle has an unfolded state and a folded state, wherein the frame includes an upper connecting rod assembly, a lower connecting rod assembly, a head pipe and a support rod, which form a four-bar linkage mechanism, thereby folding and unfolding. When folding, first unlock the locking device, then pull the push rod assembly upward to disengage it from the upper and lower connecting rod assemblies, and then flip the push rod assembly forward to make the push rod assembly, the handlebar, the upper connecting rod assembly and the lower connecting rod assembly close to each other, and stack them in sequence from top to bottom. This configuration can effectively reduce the volume of the children's tricycle for easy carrying, and the children's tricycle can be folded and unfolded when necessary. The contents of CN105480342B can be fully cited in this article for reference. The applicant hopes to further develop a new type of children's tricycle on this basis, which is more convenient to fold and unfold, and has a more compact volume after folding. Summary of the invention

[0004] In view of the above-mentioned problems, an object of the present invention is to provide a foldable baby stroller which is more convenient to fold and unfold and has a more compact volume after folding.

[0005] To achieve the above-mentioned objectives, the present invention provides a foldable baby stroller having an unfolded state and a folded state, wherein the foldable baby stroller comprises a frame body, a front wheel assembly arranged at the front of the frame body and comprising at least one front wheel, a rear wheel assembly arranged at the rear of the frame body and comprising at least two rear wheels, and a seat assembly arranged at the upper part of the frame body, wherein the frame body comprises: a head tube; at least one beam, the beam having a first end and a second end, the first end of the beam being pivotally connected to the head tube; at least one connecting head, the second end of the beam being pivotally connected to the connecting head; at least two rear fork rods, the rear fork rods having a first end and a second end, the first end of the rear fork rods being pivotally connected to the connecting head, and the second end of the rear fork rods being connected to the rear wheel assembly.

[0006] Preferably, the at least one beam includes a first beam and a second beam, the first ends of the first beam and the second beam are pivotally connected to the head pipe through at least one connecting block, the at least one connecting head includes a first connecting head and a second connecting head, the first connecting head and the second connecting head can contact and separate from each other, and the second ends of the first beam and the second beam are pivotally connected to the first connecting head and the second connecting head.

[0007] Preferably, the first connecting head has a first upper pivot joint, a second upper pivot joint and a third upper pivot joint respectively facing different directions, and the second connecting head has a first lower pivot joint, a second lower pivot joint and a third lower pivot joint respectively facing different directions, wherein the second end of the first beam is pivotally connected to the first connecting head via the first upper pivot joint, and the second end of the second beam is pivotally connected to the second connecting head via the first lower pivot joint.

[0008] Preferably, it further comprises a locking member, which locks the first connector and the second connector together during normal use, and is released when folding is required.

[0009] Preferably, the at least two rear fork rods include a first rear fork rod and a second rear fork rod, the first rear fork rod includes a first upper rear fork rod and a first lower rear fork rod, and the second rear fork rod includes a second upper rear fork rod and a second lower rear fork rod.

[0010] Preferably, the at least two rear fork rods include a first rear fork rod and a second rear fork rod, the first rear fork rod includes a first upper rear fork rod and a first lower rear fork rod, the second rear fork rod includes a second upper rear fork rod and a second lower rear fork rod, and each of the rear fork rods has a first end and a second end, the first end of the first upper rear fork rod is pivotally connected to the first connecting head via the third upper pivot joint, the first end of the second upper rear fork rod is pivotally connected to the first connecting head via the second upper pivot joint, the first end of the first lower rear fork rod is pivotally connected to the second connecting head via the third lower pivot joint, the first end of the second lower rear fork rod is pivotally connected to the second connecting head via the second lower pivot joint, the second ends of the first upper rear fork rod and the first lower rear fork rod are pivotally connected to a rear wheel fixing seat located at an inner side of the rear wheel, and the second ends of the second upper rear fork rod and the second lower rear fork rod are pivotally connected to a rear wheel fixing seat located at an inner side of the other rear wheel.

[0011] Preferably, the foldable baby stroller further comprises a push rod assembly for providing guidance for folding of the foldable baby stroller.

[0012] Preferably, the at least one connector includes a first connector and a second connector, the push rod assembly includes a push rod, the first connector is slidable relative to the push rod, and the second connector is fixed relative to the push rod.

[0013] Preferably, the foldable children's vehicle is a foldable children's tricycle, and the foldable children's tricycle includes a front wheel arranged at the front of the frame body, two rear wheels arranged at the rear of the frame body, and a steering assembly arranged at the front of the frame body.

[0014] Preferably, the foldable children's tricycle further comprises a pedal for driving the front wheel and / or a pedal fixed to the frame body.

[0015] Preferably, the various parts of the foldable children's tricycle after folding are respectively: the rear wheel assembly, the frame body, the steering assembly, the front wheel assembly, and the seat assembly from bottom to top.

[0016] The present invention also provides a foldable frame for a foldable children's vehicle, the frame comprising: a head tube; a first beam and a second beam, the first beam and the second beam respectively having a first end and a second end, the first end of the first beam being pivotally connected to the head tube, and the first end of the second beam being pivotally connected to the head tube; a first connecting head and a second connecting head, the first connecting head having a first upper pivot joint, a second upper pivot joint and a third upper pivot joint respectively facing different directions, the second connecting head having a first lower pivot joint, a second lower pivot joint and a third lower pivot joint respectively facing different directions, the second end of the first beam being pivotally connected to the first connecting head via the first upper pivot joint, the second end of the second beam being pivotally connected to the second connecting head via the first lower pivot joint, the first connecting head and the second connecting head being able to move towards or away from each other; and a A rear fork rod and a second rear fork rod, the first rear fork rod comprising a first upper rear fork rod and a first lower rear fork rod, the second rear fork rod comprising a second upper rear fork rod and a second lower rear fork rod, each of the rear fork rods having a first end and a second end, respectively, the first end of the first upper rear fork rod being pivotally connected to the first connecting head via the third upper pivot joint, the first end of the second upper rear fork rod being pivotally connected to the first connecting head via the second upper pivot joint, the first end of the first lower rear fork rod being pivotally connected to the second connecting head via the third lower pivot joint, the first end of the second lower rear fork rod being pivotally connected to the second connecting head via the second lower pivot joint, the second ends of the first upper rear fork rod and the first lower rear fork rod being pivotally connected to a rear wheel fixing seat located on the inner side of one rear wheel, and the second ends of the second upper rear fork rod and the second lower rear fork rod being pivotally connected to a rear wheel fixing seat located on the inner side of the other rear wheel.

[0017] Preferably, the foldable frame further comprises a push rod assembly, wherein the push rod assembly comprises a telescopic push rod, the first connecting head is slidable relative to the push rod, and the second connecting head is fixed relative to the push rod.

[0018] The foldable baby stroller of the present invention cleverly applies the principle of a planar linkage mechanism, and can achieve "one-touch" folding without disassembling parts when folding, which is very convenient and quick to operate. Moreover, compared with the prior art, the foldable baby stroller of the present invention is more compact after folding, and in particular, the longitudinal dimension is significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a side view of a children's tricycle according to a first embodiment of the present invention, wherein the children's tricycle is not equipped with a push rod assembly;

[0020] Figure 2 yes Figure 1 An exploded perspective view of the children's tricycle shown;

[0021] Figure 3 yes Figure 1 A front view of the children's tricycle shown;

[0022] Figure 4 From another angle Figure 1 An exploded perspective view of the children's tricycle shown;

[0023] Figure 5 It is a three-dimensional exploded view of the main body of the frame;

[0024] Figure 6 This is a three-dimensional exploded view of the frame body from another angle;

[0025] Figure 7 is a side view of a children's tricycle according to a second embodiment of the present invention, the children's tricycle being equipped with a push rod assembly;

[0026] Figure 8 yes Figure 7 A front view of the children's tricycle shown;

[0027] Fig. 9 yes Figure 7 A perspective view of the children's tricycle shown after being folded;

[0028] Fig.10 yes Figure 7 An exploded perspective view of the children's tricycle shown;

[0029] Fig.11 From another angle Figure 7 An exploded perspective view of the children's tricycle shown;

[0030] Fig.12 is an exploded perspective view of a frame body according to a second embodiment of the present invention; and

[0031] Fig.13 It is a perspective exploded view of the frame body according to the second embodiment of the present invention viewed from another angle. DETAILED DESCRIPTION

[0032] The preferred embodiment of the children's tricycle according to the present invention will be described in detail below with reference to the accompanying drawings, in which the same components are denoted by the same reference numerals. The terms "front", "rear", "upper" and "lower" used herein only indicate relative positional relationships and do not constitute specific limitations.

[0033] like Figure 1As shown in Figure 4, the foldable children's tricycle according to the first embodiment of the present invention includes: a frame body 1, a steering assembly 2 arranged at the front of the frame body 1, a front wheel assembly arranged at the front of the frame body 1 and including a front wheel 24, a rear wheel assembly arranged at the rear of the frame body 1 and including two rear wheels 3, and a seat assembly 4 arranged at the upper part of the frame body 1.

[0034] The frame body 1 mainly includes a head pipe 22, a first beam 11 and a second beam 12, a first connector 13 and a second connector 14, a first rear fork rod 15 and a second rear fork rod 16. The structure of the frame body 1 will be described in detail below.

[0035] The steering assembly 2 is inserted into the head tube 22 of the frame body 1. The steering assembly 2 includes a handlebar 21 for controlling the direction of travel of the children's tricycle. More specifically, the steering assembly 2 is connected to a front fork 23. One end of the front fork 23 is also inserted into the head tube 22 of the frame body 1, and the other end of the front fork 23 is mounted with a front wheel assembly. The front wheel 24 is driven by a pedal 25. The riding child can move forward by stepping on the pedal 25 while controlling the direction of travel of the children's tricycle through the handlebar 21 of the steering assembly 2.

[0036] The seat assembly 4 is arranged on the upper part of the frame body 1, and is preferably detachably mounted on a fixed seat located on the frame body 1. The seat assembly 4 may include, for example, a fence, a backrest, etc., and these components are preferably pivotally foldable to facilitate the folding of the entire children's tricycle. In addition, in order to make the ride more comfortable, a pedal 41 fixed to the frame body 1 may also be provided for the riding child to step on.

[0037] The following will further combine Figure 5 and Figure 6 The structure of the frame body 1 will be described in detail.

[0038] As shown in the figure, the first beam 11 and the second beam 12 have a first end or a front end and a second end or a rear end, respectively. The head pipe 22 is provided with a connection block 5, which may, for example, include an upper connection block 51 and a lower connection block 52. The first end of the first beam 11 is pivotally connected to the head pipe 22 through the upper connection block 51. The first end of the second beam 12 is pivotally connected to the head pipe 22 through the lower connection block 52. The first connector 13 has a first upper pivot joint 131, a second upper pivot joint 132, and a third upper pivot joint 133 facing different directions, respectively. Similarly, the second connector 14 has a first lower pivot joint 141, a second lower pivot joint 142, and a third lower pivot joint 143 facing different directions, respectively. The second end of the first beam 11 is pivotally connected to the first connector 13 through the first upper pivot joint 131. The second end of the second beam 12 is pivotally connected to the second connector 14 through the first lower pivot joint 141.

[0039] The structures of the first rear fork rod 15 and the second rear fork rod 16 are substantially the same. In the present embodiment, the first rear fork rod 15 comprises a first upper rear fork rod 151 and a first lower rear fork rod 152, and the second rear fork rod 16 comprises a second upper rear fork rod 161 and a second lower rear fork rod 162. Each rear fork rod has a front end or a first end and a rear end or a second end. The first end of the first upper rear fork rod 151 is pivotally connected to the first connecting head 13 through the third upper pivot joint 133, and the first end of the second upper rear fork rod 161 is pivotally connected to the first connecting head 13 through the second upper pivot joint 132. The first end of the first lower rear fork rod 152 is pivotally connected to the second connecting head 14 through the third lower pivot joint 143, and the first end of the second lower rear fork rod 162 is pivotally connected to the second connecting head 14 through the second lower pivot joint 142. The second ends of the first upper rear fork rod 151 and the first lower rear fork rod 152 are pivotally connected to the rear wheel fixing seat 31 located on the inner side of one rear wheel. The second ends of the second upper rear fork rod 161 and the second lower rear fork rod 162 are pivotally connected to the rear wheel fixing seat 31 located at the inner side of the other rear wheel.

[0040] The first connector 13 and the second connector 14 can move toward or away from each other in a substantially vertical direction. Preferably, when the tricycle is in normal use, the first connector 13 and the second connector 14 are in contact with each other; when the tricycle is in a folded state, the first connector 13 and the second connector 14 are separated from each other. In addition, a locking member 6 can be preferably provided to lock the first connector 13 and the second connector 14 together during normal use. When folding is required, the locking member 6 can be released.

[0041] When the tricycle according to the first embodiment of the present invention is to be folded, the locking member 6 can be firstly loosened, and the first connector 13 and the second connector 14 can be separated by hand, so that the first beam 11, the first upper rear fork rod 151 and the second upper rear fork rod 161 move in the first direction together with the first connector 13 and gradually gather inward, and at the same time, the second beam 12, the first lower rear fork rod 152 and the second lower rear fork rod 162 move in the second direction opposite to the first direction together with the second connector 14 and gradually gather inward. Finally, the frame body 1 is formed into a folded state, wherein the first beam 11, the first upper rear fork rod 151, the second upper rear fork rod 161, the second beam 12, the first lower rear fork rod 152 and the second lower rear fork rod 162 are close to each other and substantially parallel to each other, thereby forming a compact folded state. At the same time, the remaining components of the tricycle (such as the steering assembly 2 and the seat assembly 4) are also folded inward respectively along with the folding movement of the frame body 1. In this way, the folding process of the entire tricycle is completed.

[0042] When the child tricycle is to be opened from the folded state to the normal use state, the seat assembly 4 of the child tricycle can be unfolded first, and the steering assembly 2 and the first upper rear fork rod 151 or the second upper rear fork rod 161 can be respectively held with both hands to unfold outward. During the unfolding process, the first connector 13 and the second connector 14 move toward each other, so that the first beam 11, the first upper rear fork rod 151, the second upper rear fork rod 161, the second beam 12, the first lower rear fork rod 152 and the second lower rear fork rod 162 also move following the movement of the first connector 13 and the second connector 14, so as to be unfolded in place. Finally, the locking member 6 can be locked to put the child tricycle in the normal use state.

[0043] As will be mentioned below, the parts of the children's tricycle after folding are respectively: a rear wheel assembly, a frame body 1, a steering assembly 2, a front wheel assembly, and a seat assembly 4 from bottom to top.

[0044] The following will be combined Figure 7 - Fig.13 The foldable tricycle for children according to the second embodiment of the present invention is described below. Different from the first embodiment described above, the foldable tricycle for children according to the second embodiment of the present invention further includes a push rod assembly 7. The push rod assembly 7 can be used by adults like a conventional push rod assembly. More importantly, in the present invention, the push rod assembly 7 also serves to provide a guide for the folding of the tricycle for children.

[0045] The push rod assembly 7 mainly includes a handle 73 and a push rod. The push rod is preferably retractable. A through hole 71 for the push rod to pass through is provided on the first connector 13, and a connecting tube 72 that can be engaged with the push rod is provided on the second connector 14. Therefore, the first connector 13 is slidable relative to the push rod, while the second connector 14 is fixed relative to the push rod. The push rod has a proximal end (i.e., the end provided with the handle 73) and a distal end (i.e., the end connected to the second connector 14).

[0046] The folding process of the children's tricycle according to the second embodiment of the present invention is as follows. First, shorten the push rod and release the locking piece 6. Then, separate the first connector 13 and the second connector 14 by hand. Next, the first beam 11, the first upper rear fork rod 151 and the second upper rear fork rod 161 move along the push rod toward the proximal end of the push rod along with the first connector 13 and gradually gather inward toward the push rod; at the same time, the second beam 12, the first lower rear fork rod 152 and the second lower rear fork rod 162 gradually gather inward toward the push rod from the second connector 14 at the distal end of the push rod. Finally, the frame body 1 is formed into a folded state, wherein the first beam 11, the first upper rear fork rod 151, the second upper rear fork rod 161, the second beam 12, the first lower rear fork rod 152 and the second lower rear fork rod 162 are very close to the push rod and are basically parallel to the push rod, thereby forming a compact folded state. At the same time, the remaining components of the children's tricycle (such as the steering assembly 2 and the seat assembly 4) are also folded inwards in sequence along with the movement of the frame body 1. This completes the folding process of the entire children's tricycle.

[0047] Fig. 9 The folded tricycle for children is shown in FIG. 1. As can be seen from the figure, the parts of the tricycle for children after folding are respectively: a rear wheel assembly, a frame body 1, a steering assembly 2, a front wheel assembly, and a seat assembly 4 from bottom to top.

[0048] When the child tricycle is to be opened from the folded state to the normal use state, the seat assembly 4 of the child tricycle can be unfolded first, and the steering assembly 2 and the first upper rear fork rod 151 or the second upper rear fork rod 161 can be respectively held with both hands to unfold outward. During the unfolding process, the first connector 13 and the second connector 14 move toward each other, so that the first beam 11, the first upper rear fork rod 151, the second upper rear fork rod 161, the second beam 12, the first lower rear fork rod 152 and the second lower rear fork rod 162 also move following the movement of the first connector 13 and the second connector 14, so as to be unfolded in place. Finally, the locking member 6 can be locked to put the child tricycle in the normal use state.

[0049] The foldable tricycle for children according to the preferred embodiment of the present invention is described above. It should be understood that the concept of the folding structure of the present invention is not limited to tricycles for children, but can be more widely applied to products such as strollers and baby strollers. Accordingly, one front wheel can be changed into two or more front wheels; or the steering assembly and pedals can be removed, and at least one universal wheel can be used as a front wheel if necessary.

[0050] The frame body of the foldable baby stroller of the present invention can also be changed. For example, the first rear fork rod 15 including the first upper rear fork rod 151 and the first lower rear fork rod 152 and the second rear fork rod 16 including the second upper rear fork rod 161 and the second lower rear fork rod 162 in the above embodiment can be in the form of a single rod or in the form of a single rod with multiple sections. For example, the first beam 11 and the second beam 12 in the above embodiment can also be simplified into one. In other words, a configuration of one beam with two rear forks or one beam with four or more rear forks can be formed.

[0051] The connecting blocks, connecting heads, pivot joints, locking members and other components used in the present invention are well known to those skilled in the art, but other arrangements may also be used. For example, in the above embodiment, the first ends of the first beam 11 and the second beam 12 are pivotally connected to two connecting blocks respectively, and the first ends of the first beam 11 and the second beam 12 may also be pivotally connected to one connecting block. It should be understood that the term "head pipe" used herein should cover various connection structures.

[0052] Although the present invention has been described in detail above, it should be understood that those skilled in the art should be able to make various changes based on the above disclosure. Therefore, the protection scope of the present invention is limited only by the attached claims.

[0053] The following is a description of the various reference numerals:

[0054] 1: Frame body

[0055] 2: Steering assembly

[0056] 3: Rear wheel

[0057] 4: Seat assembly

[0058] 5: Connecting blocks

[0059] 6: Locking parts

[0060] 7: Push rod assembly

[0061] 11: The first beam

[0062] 12: The second beam

[0063] 13: First connector

[0064] 14: Second connector

[0065] 15: First rear fork

[0066] 16: Second rear fork

[0067] 21: Handle

[0068] 22: Head tube

[0069] 23: Front fork

[0070] 24: Front wheel

[0071] 25: Foot pedal

[0072] 31: Rear wheel fixing seat

[0073] 41: Pedal

[0074] 51: Upper connection block

[0075] 52: Lower connection block

[0076] 71: Through hole

[0077] 72: Connecting pipe

[0078] 73: Handle

[0079] 131: First upper pivot joint

[0080] 132: Second upper pivot joint

[0081] 133: Third upper pivot joint

[0082] 141: First lower pivot joint

[0083] 142: Second lower pivot joint

[0084] 143: Third lower pivot joint

[0085] 151: First upper rear fork

[0086] 152: First rear fork

[0087] 161: Second upper rear fork

[0088] 162: Second rear fork

Claims

1. A foldable baby stroller having an unfolded state and a folded state, the foldable baby stroller comprising a frame body, a front wheel assembly disposed at the front of the frame body and comprising at least one front wheel, a rear wheel assembly disposed at the rear of the frame body and comprising at least two rear wheels, and a pivotally foldable seat assembly disposed at the upper portion of the frame body, wherein: The frame body comprises: a head tube; at least one beam, the beam having a first end and a second end, the first end of the beam being pivotally connected to the head tube; at least one connecting head, the second end of the beam being pivotally connected to the connecting head; at least two rear fork rods, the rear fork rods having a first end and a second end, the first end of the rear fork rods being pivotally connected to the connecting head, and the second end of the rear fork rods being connected to the rear wheel assembly, The at least one beam comprises a first beam and a second beam, the first ends of the first beam and the second beam are pivotally connected to the head pipe through at least one connecting block, the at least one connecting head comprises a first connecting head and a second connecting head, the first connecting head and the second connecting head can contact and separate from each other, and the second ends of the first beam and the second beam are pivotally connected to the first connecting head and the second connecting head respectively. It also includes a locking member, which locks the first connector and the second connector together during normal use, and is released when folding is required.

2. The foldable baby stroller according to claim 1, characterized in that: The first connecting head has a first upper pivot joint, a second upper pivot joint and a third upper pivot joint respectively facing different directions, and the second connecting head has a first lower pivot joint, a second lower pivot joint and a third lower pivot joint respectively facing different directions, wherein the second end of the first beam is pivotally connected to the first connecting head via the first upper pivot joint, and the second end of the second beam is pivotally connected to the second connecting head via the first lower pivot joint.

3. The foldable baby stroller according to claim 1, characterized in that: The at least two rear fork rods include a first rear fork rod and a second rear fork rod, the first rear fork rod includes a first upper rear fork rod and a first lower rear fork rod, and the second rear fork rod includes a second upper rear fork rod and a second lower rear fork rod.

4. The foldable baby stroller according to claim 2, characterized in that: The at least two rear fork rods include a first rear fork rod and a second rear fork rod, the first rear fork rod including a first upper rear fork rod and a first lower rear fork rod, the second rear fork rod including a second upper rear fork rod and a second lower rear fork rod, each of the rear fork rods has a first end and a second end, the first end of the first upper rear fork rod is pivotally connected to the first connecting head through the third upper pivot joint, the first end of the second upper rear fork rod is pivotally connected to the first connecting head through the second upper pivot joint, the first end of the first lower rear fork rod is pivotally connected to the second connecting head through the third lower pivot joint, the first end of the second lower rear fork rod is pivotally connected to the second connecting head through the second lower pivot joint, the second ends of the first upper rear fork rod and the first lower rear fork rod are pivotally connected to a rear wheel fixing seat located on the inner side of the rear wheel, and the second ends of the second upper rear fork rod and the second lower rear fork rod are pivotally connected to a rear wheel fixing seat located on the inner side of the other rear wheel.

5. The foldable baby stroller according to claim 1, characterized in that: Also included is a push rod assembly for providing guidance for folding the foldable baby stroller.

6. The foldable baby stroller according to claim 5, characterized in that: The push rod assembly includes a push rod, the first connector is slidable relative to the push rod, and the second connector is fixed relative to the push rod.

7. A foldable baby stroller according to any one of the preceding claims, characterized in that: The foldable children's tricycle is a foldable children's tricycle, which comprises a front wheel arranged at the front of the frame body, two rear wheels arranged at the rear of the frame body, and a steering assembly arranged at the front of the frame body.

8. The foldable baby stroller according to claim 7, characterized in that: The foldable children's tricycle further comprises a pedal for driving the front wheel and / or a pedal fixed to the frame body.

9. The foldable baby stroller according to claim 7, characterized in that: After being folded, the various parts of the foldable children's tricycle are respectively: the rear wheel assembly, the frame body, the steering assembly, the front wheel assembly, and the seat assembly from bottom to top.

10. A foldable frame for a foldable baby carriage, the frame comprising: Head tube; a first beam and a second beam, the first beam and the second beam having a first end and a second end, respectively, the first end of the first beam being pivotally connected to the head tube, the first end of the second beam being pivotally connected to the head tube; a first connecting head and a second connecting head, the first connecting head having a first upper pivot joint, a second upper pivot joint and a third upper pivot joint facing different directions respectively, the second connecting head having a first lower pivot joint, a second lower pivot joint and a third lower pivot joint facing different directions respectively, the second end of the first beam is pivotally connected to the first connecting head through the first upper pivot joint, the second end of the second beam is pivotally connected to the second connecting head through the first lower pivot joint, the first connecting head and the second connecting head can move toward or away from each other so as to contact and separate from each other, the frame further comprising a locking member, the locking member locks the first connecting head and the second connecting head together in normal use, and the locking member is released when folding is required; and The first rear fork rod and the second rear fork rod, the first rear fork rod comprising a first upper rear fork rod and a first lower rear fork rod, the second rear fork rod comprising a second upper rear fork rod and a second lower rear fork rod, each of the rear fork rods having a first end and a second end, respectively, the first end of the first upper rear fork rod being pivotally connected to the first connecting head via the third upper pivot joint, the first end of the second upper rear fork rod being pivotally connected to the first connecting head via the second upper pivot joint, the first end of the first lower rear fork rod being pivotally connected to the second connecting head via the third lower pivot joint, the first end of the second lower rear fork rod being pivotally connected to the second connecting head via the second lower pivot joint, the second ends of the first upper rear fork rod and the first lower rear fork rod being pivotally connected to a rear wheel fixing seat located on the inner side of one rear wheel, and the second ends of the second upper rear fork rod and the second lower rear fork rod being pivotally connected to a rear wheel fixing seat located on the inner side of the other rear wheel.

11. The foldable frame according to claim 10, characterized in that: The invention also comprises a push rod assembly, wherein the push rod assembly comprises a telescopic push rod, the first connecting head is slidable relative to the push rod, and the second connecting head is fixed relative to the push rod.

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