Frame assembly for stroller and folding stroller

Abstract

The frame assembly comprises a main beam pipe, a rear fork leg assembly and a rotating assembly, the rear fork leg assembly is connected to the main beam pipe through the rotating assembly, the rotating assembly comprises a connecting bush and a rotating bush rotationally installed relative to the connecting bush, the connecting bush is installed on the main beam pipe, and the rotating bush is installed on the main beam pipe. The connecting bushing is attached to the rear fork leg assembly; the rotating bushing rotates between a first position and a second position around a rotating axis relative to the connecting bushing, the rotating assembly comprises a locking mechanism, the locking mechanism comprises a locking piece used for locking the rotating bushing in the first position when the locking piece is not actuated, the rotating bushing can rotate to the second position when the locking piece is actuated, and the locking piece is used for locking the rotating bushing in the second position when the locking piece is actuated. And the locking piece is arranged on the connecting bush or the rotating bush. The stroller frame assembly can keep the stroller in an unfolded state, and accidental folding is avoided.

Description

Technical Field

[0001] The utility model relates to a child stroller, and more particularly to a frame assembly for the child stroller and a foldable child stroller comprising the frame assembly. Background Art

[0002] Strollers are an essential means of transportation for children. They not only provide parents with a convenient way to carry and take care of infants and young children, but also ensure the safety and comfort of children when they are out. There are various types of strollers on the market to meet the different needs of children of different ages.

[0003] In order to facilitate carrying, transportation and storage, strollers usually have a foldable structure so that the stroller can be folded up when not in use. Various types of foldable structures have been applied to strollers on the market. With the improvement of living standards, people have higher and higher requirements for travel convenience. Therefore, the operability of the stroller when folding and the size of the stroller after folding have become the focus of consumers. More specifically, with respect to foldable strollers, the better the linkage of the components of the stroller, the easier the folding and unfolding operations are. Otherwise, the operation is laborious.

[0004] Some existing foldable strollers can quickly switch from an expanded state to a folded state. For example, after triggering the unlocking function of the foldable structure, the various components of the stroller can be folded smoothly and unimpeded to switch from the expanded state to the folded state. However, the inventors have found that such foldable strollers have shortcomings: during use, the unlocking function of the foldable structure may be triggered by mistake. Once the unlocking function of the foldable structure is triggered by mistake, the stroller will switch to the folded state under the weight of the child or the weight of the components themselves, and accidents may occur.

[0005] Therefore, there is a need for a frame assembly for a child stroller, which can keep the child stroller in an unfolded state and avoid accidental folding. Utility Model Content

[0006] In order to further improve the frame assembly of a foldable baby stroller and enable it to remain in the unfolded state, for example, when the unlocking function of the foldable structure is accidentally triggered, and to avoid accidental folding, the frame assembly for a baby stroller according to the present utility model includes: a main beam tube; a rear fork leg assembly for mounting wheels; and a rotating assembly, wherein the rear fork leg assembly is connected to the main beam tube through the rotating assembly; wherein, the rotating assembly includes a connecting bushing and a rotating bushing rotatably mounted relative to the connecting bushing, the connecting bushing is mounted on the main beam tube, and the connecting bushing is attached to the rear fork leg assembly; the rotating bushing rotates relative to the connecting bushing between a first position and a second position about a rotation axis, wherein, the rotating assembly includes a locking mechanism, the locking mechanism includes a locking member for locking the rotating bushing in the first position when not actuated, and when the locking member is actuated, the rotating bushing can rotate to the second position, and the locking member is provided on the connecting bushing or the rotating bushing.

[0007] According to one aspect of the present utility model, the locking mechanism includes an elastic member abutting against the locking member, and the elastic force of the elastic member holds the locking member in the first position.

[0008] According to still another aspect of the present utility model, the rotating assembly further includes a pivot member and a pivot groove, at least a part of the pivot member is inserted into the pivot groove, the pivot groove has a first end and a second end, the first position is provided when the pivot member abuts against the first end, and the second position is provided when the pivot member abuts against the second end, wherein the locking member is arranged to hold the pivot member in abutment against the first end.

[0009] According to still another aspect of the present utility model, the rear fork leg assembly includes a pair of fork feet, and wheels are mounted on the fork feet; the rotating bushing includes a pair of rotating bushings, the pair of rotating bushings are respectively connected to one of the pair of fork feet, and the pair of rotating bushings are arranged on opposite sides of the connecting bushing along the direction of the rotation axis.

[0010] According to still another aspect of the present utility model, the rotating assembly further includes a pivot bolt and a pivot groove, both ends of the pivot bolt are respectively fixedly connected to the pair of rotating bushings, the pivot groove is arranged in the connecting bushing, and the pivot bolt passes through the pivot groove.

[0011] According to still another aspect of the present utility model, a locking slot communicating with the pivot groove is provided on the side wall of the connecting bushing parallel to the rotation axis, the locking member is rotatably arranged on the side wall so that the locking hook of the locking member protrudes into the locking slot, and the locking member further includes a locking member operation end extending away from the side wall of the connecting bushing.

[0012] According to still another aspect of the present utility model, the frame assembly further includes a seat assembly fixing bushing, and the seat assembly fixing bushing is rotatably connected to the rotating bushing.

[0013] The frame assembly for a stroller according to the present utility model includes a locking mechanism, which can, for example, in a scenario such as accidentally triggering the unlocking function of the foldable structure, maintain the frame assembly, that is, maintain the stroller in an unfolded state, and prevent accidental folding.

[0014] The present utility model also provides a foldable stroller, which includes a frame assembly according to any one of the above aspects, and the foldable stroller further includes a collapsible seat assembly mounted on the frame assembly. The frame assembly further includes folding linkages, which include an upper folding linkage and a lower folding linkage. The upper folding linkage is connected between the seat assembly and a linkage fixing bushing sleeved on the main beam tube, and the lower folding linkage is connected between the linkage fixing bushing on the main beam tube and the rear fork leg assembly. The sliding of the linkage fixing bushing along the main beam tube drives the folding linkages to simultaneously fold the seat assembly and the rear fork leg assembly. When the locking mechanism locks the rotating bushing, the seat assembly cannot be folded.

[0015] According to another aspect of the present utility model, the frame assembly further includes an upper push rod and a lower push rod. The upper push rod is operably inserted and moved in the lower push rod, and the lower push rod is operably inserted and moved in the main beam tube.

[0016] The foldable stroller according to the present utility model includes a frame assembly that includes a locking mechanism, which can, for example, in a scenario such as accidentally triggering the unlocking function of the foldable structure, maintain the frame assembly, that is, maintain the stroller in an unfolded state, and prevent accidental folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To better understand the present utility model, reference may be made to the following description of exemplary embodiments in conjunction with the accompanying drawings, in which:

[0018] Figure 1 A perspective view of a frame assembly for a stroller according to a preferred embodiment of the present utility model is shown;

[0019] Figure 2 A side view of a frame assembly for a stroller according to a preferred embodiment of the present utility model is shown;

[0020] Figure 3 An exploded view of a frame assembly for a stroller according to a preferred embodiment of the present utility model is shown;

[0021] Figure 4 A partially enlarged side view cross-sectional view of a frame assembly for a stroller according to a preferred embodiment of the present utility model is shown;

[0022] Figure 5 A partially enlarged perspective view cross-sectional view of a frame assembly for a stroller according to a preferred embodiment of the present utility model is shown;

[0023] Figure 6a Shows a schematic diagram of the unfolded state of a baby stroller including a frame assembly according to a preferred embodiment of the present utility model;

[0024] Figure 6b Shows a schematic diagram of the folded state of a baby stroller including a frame assembly according to a preferred embodiment of the present utility model.

[0025] List of reference numerals

[0026] 100 Frame assembly;

[0027] 1 Rotating assembly;

[0028] 11 Rotating bushing;

[0029] 12 Connecting bushing;

[0030] 13 Locking member;

[0031] 131 Locking hook;

[0032] 132 Operating end of the locking member;

[0033] 133 Tail end of the locking member;

[0034] 14 Locking slot;

[0035] 15 Pivoting slot;

[0036] 16 Pivoting member;

[0037] 2 Rear fork leg assembly;

[0038] 21 Fork foot;

[0039] 3 Telescopic rod assembly;

[0040] 31 Upper push rod;

[0041] 32 Lower push rod;

[0042] 33 Main beam tube;

[0043] 41 Upper folding link;

[0044] 42 Lower folding link;

[0045] 51 Fixed bushing for the seat assembly;

[0046] 52 Fixed bushing for the link;

[0047] 1000 Baby stroller. Detailed implementation manner

[0048] The present invention will be further described below in conjunction with specific embodiments and the accompanying drawings. In the following description, more details are set forth in order to fully understand the present invention. However, the present invention is clearly capable of being implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0049] Figure 1 and Figure 2 respectively show a perspective view and a side view of a frame assembly 100 for a baby stroller according to a preferred embodiment of the present invention, wherein the frame assembly 100 is in an unfolded state. The frame assembly 100 is generally used to form a foldable baby stroller 1000 as shown in Figure 6a and Figure 6b , and a seat assembly is mounted on the frame assembly 100.

[0050] Generally, the frame assembly 100 includes a rotating assembly 1, a rear fork leg assembly 2, and a main beam tube 33. The rotating assembly 1 and the rear fork leg assembly 2 are assembled and mounted on the main beam tube 33. More specifically, the rear fork leg assembly 2 is connected to the main beam tube 33 through the rotating assembly 1. Through the rotating assembly 1, the rear fork leg assembly 2 can pivot relative to the main beam tube 33, so that the frame assembly 100 can be switched between an unfolded state as shown in Figure 1 and 2 and a folded state as shown in Figure 6b .

[0051] Specifically according to the present invention, the rotating assembly 1 includes a locking mechanism. The locking mechanism includes a locking member 13, which is configured to lock the frame assembly 100 in the unfolded state when not actuated, and when the locking member 13 is actuated or unlocked, the rear fork leg assembly 2 can pivot relative to the main beam tube 33 through the rotating assembly 1, so that the frame assembly 100 is switched from the unfolded state to the folded state.

[0052] Figure 3 shows an exploded view of a frame assembly 100 for a baby stroller according to a preferred embodiment of the present invention. Generally, the rotating assembly 1 includes a connecting bushing 11, a rotating bushing 12 configured to be rotatably mounted relative to the connecting bushing 11, and a locking mechanism ( Figure 3 not shown, see Figure 4 and Figure 5 ).

[0053] The connecting bushing 11 of the rotating assembly 1 is installed on the main beam tube 33. The rotating bushing 12 of the rotating assembly 1 is attached to the fork foot 21 of the rear fork assembly 2. The rotating bushing 12 is configured to rotate relative to the connecting bushing 11 between a first position and a second position about a rotation axis. When the rotating bushing 12 is in the first position relative to the connecting bushing 11, the frame assembly 100 is in the deployed state, and when the rotating bushing 12 is in the second position relative to the connecting bushing 11, the frame assembly 100 is in the retracted state.

[0054] More specifically, the rotating assembly 1 further includes a pivot groove 15 and a pivot member 16, and at least a part of the pivot member 16 is inserted into the pivot groove 15. The pivot groove 15 of the rotating assembly 1 has a first end and a second end. When the pivot member 16 abuts against the first end of the pivot groove 15, the rotating bushing 12 of the rotating assembly 1 is in the first position relative to the connecting bushing 11, that is, the frame assembly 100 is in the deployed state, and when the pivot member 16 abuts against the second end of the pivot groove 15, the rotating bushing 12 of the rotating assembly 1 is in the second position relative to the connecting bushing 11, that is, the frame assembly 100 is in the retracted state. The locking mechanism of the rotating assembly 1, such as the locking member 13, is configured to hold the pivot member 16 in abutment against the first end of the pivot groove 15.

[0055] In a preferred embodiment of the present utility model, the pivot member 16 is a pivot bolt, and the end of the pivot bolt is fixedly connected to the rotating bushing 12. For example, both ends of the pivot bolt are fixedly connected to a pair of rotating bushings 12, and the pivot bolt passes through the pivot groove 15 and can move in the space of the pivot groove 15.

[0056] Alternatively, the pivot member 16 can be integrally formed with the rotating bushing 12. For example, the pivot member 16 is integrally formed with one of a pair of rotating bushings 12, the pivot member 16 passes through the pivot groove 15, and then is fixedly connected to the other of the pair of rotating bushings 12.

[0057] In a preferred embodiment of the present utility model, the pivot groove 15 is provided in the connecting bushing 11. Alternatively, the pivot groove 15 can also be provided in the rotating bushing 12.

[0058] In a preferred embodiment of the present utility model, the frame assembly 100 further includes a seat assembly fixing bushing 51, as Figure 3 shown. The seat assembly fixing bushing 51 is rotatably connected to the rotating bushing 12. The seat assembly of the baby stroller can be installed on the seat assembly fixing bushing 51.

[0059] In a preferred embodiment of the present utility model, the pivot members 16 are arranged in pairs, and the pivot grooves 15 are also arranged in pairs. More specifically, the pair of pivot grooves 15 are centrosymmetric about the rotation axis of the rotating assembly 1.

[0060] Figure 4 and Figure 5 respectively show a partially enlarged side cross-sectional view and a partially enlarged three-dimensional cross-sectional view of a frame assembly 100 for a stroller according to a preferred embodiment of the present invention. In combination with Figure 4 and Figure 5 the locking mechanism of the frame assembly 100 of the preferred embodiment of the present invention can be more clearly described.

[0061] The locking mechanism of the rotating assembly 1 of the frame assembly 100 includes a locking member 13 and a locking slot 14. The locking slot 14 communicates with the pivot slot 15. The locking member 13 and the locking slot 14 are configured such that the locking member 13 can move between a locking position and a release position. When the locking member 13 is in the locking position, a part of the locking member 13, for example, a locking hook 131 extending from the locking member 13, protrudes into the locking slot 14, passes through the locking slot 14 and protrudes into the pivot slot 15 to at least partially block the pivot slot 15, preferably completely block the pivot slot 15, thereby restricting the pivot member 16 at the first end of the pivot slot 15, and the pivot member 16 cannot move along the pivot slot 15; and when the locking member 13 is in the release position, a part of the locking member 13, such as the locking hook 131, leaves the pivot slot 15, so as not to block the pivot slot 15. At this time, the pivot member 16 will be able to move along the pivot slot 15 away from the first end of the pivot slot 15. More specifically, the locking slot 14 is closer to the first end of the pivot slot 15.

[0062] In a further embodiment of the present invention, the locking member 13 is rotatably disposed on a side wall of the connecting bushing 11 parallel to the rotation axis. Alternatively, in an embodiment where the pivot slot 15 is disposed in the rotating bushing 12, the locking slot 14 is disposed on a side wall of the rotating bushing 12 parallel to the rotation axis and communicates with the pivot slot 15 in the rotating bushing 12.

[0063] More specifically, the locking member 13 includes a locking member body, a locking member operation end 132 at one end of the locking member body, and a locking member tail end 133 at the other end of the locking member body. The locking member 13 is rotatably disposed on the side wall of the connecting bushing 11 through a locking member pivot portion. Preferably, the locking hook 131 of the locking member 13 is closer to the locking member operation end 132, and the locking member pivot portion is closer to the locking member tail end 133 of the locking member 13.

[0064] The operating end 132 of the locking member 13 of the locking member extends angularly away from the side wall of the connecting bushing 11 with respect to the main body of the locking member, facilitating finger pressing operation. More specifically, the operating end 132 of the locking member is configured such that when the locking member 13 is in the locked position, the operating end 132 of the locking member extends out from the side wall of the connecting bushing 11, facilitating the user to move the locking member 13 from the locked position to the released position by applying a force on the operating end 132 of the locking member to actuate the locking member 13. More particularly, grooves, such as wavy grooves, are provided on the surface of the operating end 132 of the locking member to improve the surface friction of the operating end 132 of the locking member, thereby improving the fit between the user's finger and the operating end 132 of the locking member.

[0065] The main body of the locking member 13 of the locking member is arc-shaped, and the arc preferably conforms to the surface arc of the side wall of the connecting bushing 11.

[0066] A groove is also provided at a position on the side wall of the connecting bushing 11 corresponding to the tail end 133 of the locking member 13 of the locking member for receiving the tail end 133 of the locking member 13 when the locking member 13 is in the released position.

[0067] When the locking member 13 is in the locked position, the locking hook 131 of the locking member 13 protrudes into the locking slot 14 and into the pivot slot 15 to completely block the pivot slot 15. More specifically, when the locking member 13 is in the locked position and the frame assembly 100 is in the deployed state, the locking hook 131 of the locking member 13 protrudes into the locking slot 14 and into the pivot slot 15 to hold the pivot member 16 in abutment against the first end of the pivot slot 15 in the pivot slot 15, thereby maintaining the frame assembly 100 in the deployed state.

[0068] In addition, in a preferred embodiment of the present invention, the locking mechanism of the rotating assembly 1 of the frame assembly 100 further includes an elastic member configured to bias the locking member 13 of the locking mechanism to the locked position. In this way, on the one hand, the elastic member can help the locking member 13 to remain in the locked position, thereby helping to keep the pivot member 16 in abutment against the first end of the pivot slot 15 when the frame assembly 100 is in the deployed state, preventing the frame assembly 100 from accidentally collapsing. On the other hand, the elastic member can reset the locking member 13 to the locked position after the locking member 13 is actuated to move from the locked position to the released position, improving its operation convenience and avoiding the risk that the locking member 13 fails to be reset to the locked position in a timely manner due to the user's negligence.

[0069] For example, the elastic member is one or more of springs such as a torsion spring, a spring leaf, or a helical spring. Optionally, the elastic member is arranged at the tail end 133 of the locking member 13 of the locking member, and one end thereof abuts against the tail end 133 of the locking member 13 of the locking member.

[0070] Such as Figure 6aAs shown, in a further embodiment of the present invention, the frame assembly 100 further comprises a telescopic rod assembly 3 and folding connecting rods 41, 42. The arrows in the figure show the rotation direction of each assembly when the child stroller, i.e., the frame assembly 100, switches from the unfolded state to the folded state.

[0071] In a further embodiment of the present invention, the folding link further includes an upper folding link 41 and a lower folding link 42, wherein the lower folding link 42 is between the telescopic rod assembly 3 and the rear fork leg assembly 2, and the upper folding link 41 is pivotally attached between the telescopic rod assembly 3 and the seat assembly, so that when the entire frame assembly 100 is folded, the upper folding link 41 is used to fold the seat assembly toward the telescopic rod assembly 3, and the lower folding link 42 is used to fold the rear fork leg assembly 2 toward the telescopic rod assembly 3.

[0072] In a further embodiment of the present invention, the telescopic rod assembly 3 is a three-section type, specifically comprising an upper push rod 31, a lower push rod 32 and a main beam tube 33. Figure 3 As shown, the upper push rod 31 is sleeved in the lower push rod 32, so that the upper push rod 31 can slide relative to the lower push rod 32, and the lower push rod 32 is sleeved in the main beam tube 33, so that the lower push rod 32 can slide relative to the main beam tube 33. With the sliding of the upper push rod 31, the lower push rod 32 and the main beam tube 33, the three-stage telescopic rod assembly 3 can change between the extended state and the retracted state. In addition, the telescopic rod assembly 3 also includes a connecting rod fixing bushing 52 attached to the upper folding connecting rod 41 and the lower folding connecting rod 42 to drive the connecting rods 41 and 42 to move, and the connecting rod fixing bushing 52 is sleeved on the main beam tube 33.

[0073] In order to realize the controllable extension and contraction of the upper push rod 31, the lower push rod 32 and the main beam tube 33, the telescopic rod assembly 3 is provided with an upper push rod locking device and a lower push rod locking device, and a connecting rod fixing bushing 52 is provided outside the main beam tube 33. When the upper push rod locking device is locked, the sliding of the upper push rod 31 relative to the lower push rod 32 is restricted, and when the upper push rod locking device is unlocked, the upper push rod 31 can slide downward into the lower push rod 32. When the lower push rod locking device is locked, the sliding of the lower push rod 32 relative to the main beam tube 33 is restricted, and when the lower push rod locking device is unlocked, the upper push rod 31 and the lower push rod 32 slide downward into the main beam tube 33 together, thereby unlocking the connecting rod fixing bushing 52 outside the main beam tube 33, driving the two connecting rods to pivot inward together and drive the seat assembly to fold downward.

[0074] In a further embodiment of the present utility model, when the telescopic rod assembly 3 contracts, the locking devices of the telescopic rod assembly 3 and the connecting rod fixing bushing 52 can be unlocked. Then, after the locking member 13 is actuated from the locked position to the unlocked position, the pivoting member 16 in the pivoting groove 15 can pivot about the rotation axis of the rotating assembly 1. Thus, under the action of the rotating assembly 1, the components of the frame assembly 100 can pivot and fold up about the rotation axis of the rotating assembly 1. Specifically, the seat assembly folds towards the main beam tube 33 along with the relative movement between the upper folding connecting rod 41 and the connecting rod fixing bushing 52 and the main beam tube 33, and then the rear fork leg assembly 2 also folds towards the main beam tube 33 along with the relative movement between the lower folding connecting rod 42 and the connecting rod fixing bushing 52 and the main beam tube 33. However, due to the existence of the locking mechanism, when the baby stroller is in the unfolded state, if the locking member 13 is not actuated from the locked position to the unlocked position after the telescopic rod assembly 3 is contracted, the pivoting member 16 in the pivoting groove 15 will be kept in contact with the first end of the pivoting groove 15 by the locking member 13, and thus cannot pivot about the rotation axis of the rotating assembly 1. As a result, the components of the frame assembly 100 cannot be folded up smoothly due to the locking of the locking member 13. More specifically, at this time, although the locking devices of the telescopic rod assembly 3 and the connecting rod fixing bushing 52 have been unlocked, due to the locking of the locking member 13, the upper and lower folding connecting rods 41, 42 and the connecting rod fixing bushing 52 cannot move relative to the main beam tube 33, so the seat assembly and the rear fork leg assembly 2 cannot fold towards the main beam tube 33.

[0075] When using a baby stroller (as Figure 6a shown) including the frame assembly 100 according to the present utility model, for example, when the telescopic rod assembly 3 contracts and the locking devices of the telescopic rod assembly 3 and the connecting rod fixing bushing 52 are all unlocked, due to the existence of the locking mechanism on the connecting bushing 11 of the rotating assembly 1, the frame assembly 100, that is, the baby stroller is still kept in the unfolded state, and at this time the seat assembly remains in the horizontal position and will not be folded up. During operation, the user must specifically actuate the locking mechanism, such as actuating the locking member 13 to move from the locked position to the released position, in order to switch the frame assembly 100 from the unfolded state to the folded state. In this way, the seat assembly will not undergo undesired folding, for example, due to the accidental contraction of the telescopic rod assembly 3 or the actuation of the corresponding unlocking mechanism of other types of folding baby strollers, improving the safety of the baby stroller during use.

[0076] Although the present utility model is disclosed above with preferred embodiments, it is not used to limit the present utility model. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present utility model. Therefore, any modification, equivalent change and decoration made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A frame assembly for a baby stroller, comprising: A main beam tube; A rear fork leg assembly for mounting wheels; And A rotating assembly, wherein the rear fork leg assembly is connected to the main beam tube through the rotating assembly; Wherein, the rotating assembly includes a connecting bushing and a rotating bushing rotatably mounted relative to the connecting bushing. The connecting bushing is mounted on the main beam tube, and the connecting bushing is attached to the rear fork leg assembly; the rotating bushing rotates relative to the connecting bushing between a first position and a second position about a rotation axis. Characterized in that, the rotating assembly includes a locking mechanism, the locking mechanism includes a locking member for locking the rotating bushing in the first position when not actuated, and when the locking member is actuated, the rotating bushing can rotate to the second position, and the locking member is provided on the connecting bushing or the rotating bushing.

2. The frame assembly according to claim 1, wherein, The locking mechanism includes an elastic member abutting against the locking member, and the elastic force of the elastic member holds the locking member in the first position.

3. The frame assembly according to claim 1, characterized in that, The rotating assembly further includes a pivot member and a pivot groove, at least a part of the pivot member is inserted into the pivot groove, the pivot groove has a first end and a second end, and the first position is provided when the pivot member abuts against the first end, and the second position is provided when the pivot member abuts against the second end. Wherein the locking member is arranged to hold the pivot member in abutment against the first end.

4. The frame assembly according to claim 1, characterized in that The rear fork leg assembly includes a pair of fork feet, and wheels are mounted on the fork feet; The rotating bushing includes a pair of rotating bushings, the pair of rotating bushings are respectively connected to one of the pair of fork feet, and the pair of rotating bushings are arranged on opposite sides of the connecting bushing along the direction of the rotation axis.

5. The frame assembly according to claim 4, wherein, The rotating assembly further includes a pivot bolt and a pivot groove, both ends of the pivot bolt are respectively fixedly connected to the pair of rotating bushings, the pivot groove is arranged in the connecting bushing, and the pivot bolt passes through the pivot groove.

6. The vehicle frame assembly according to claim 5, wherein A locking slot communicating with the pivot groove is provided on a side wall of the connecting bushing parallel to the rotation axis, and the locking member is rotatably arranged on the side wall so that a locking hook of the locking member protrudes into the locking slot. The locking member further includes a locking member operation end, and the locking member operation end extends away from the side wall of the connecting bushing.

7. The frame assembly according to claim 1, wherein The frame assembly further includes a seat assembly fixing bushing, and the seat assembly fixing bushing is rotatably connected to the rotating bushing.

8. A foldable baby stroller, characterized in that, The foldable baby stroller includes the frame assembly as claimed in claims 1-7. And the foldable baby stroller further includes a collapsible seat assembly mounted on the frame assembly. The frame assembly further includes folding linkages, the folding linkages include an upper folding linkage and a lower folding linkage. The upper folding linkage is connected between the seat assembly and a linkage fixing bushing sleeved on the main beam tube, and the lower folding linkage is connected between the linkage fixing bushing on the main beam tube and the rear fork leg assembly. The sliding of the linkage fixing bushing along the main beam tube drives the folding linkages so that the seat assembly and the rear fork leg assembly are folded simultaneously. When the locking mechanism locks the rotating bushing, the seat assembly remains unable to be folded.

9. The foldable baby stroller according to claim 8, wherein, The frame assembly further includes an upper push rod and a lower push rod. The upper push rod is operably inserted and movable in the lower push rod, and the lower push rod is operably inserted and movable in the main beam tube.

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