Foldable frame and stroller

Abstract

The utility model relates to the technical field of baby carriages, and discloses a foldable frame and a baby stroller, the frame comprises a front support assembly, a rear support assembly, a front armrest assembly and a push handle assembly; a first gear part is arranged on the front supporting assembly; the front armrest assembly is provided with a transmission gear and a lock groove. The push handle assembly comprises an upper push handle and a lower push rod, and the upper push handle can be rotatably folded to the lower push rod; a frame locking piece and a second gear part are arranged on the lower push rod, and the second gear part is meshed with the first gear part and the transmission gear; when the frame is in the unfolded state, the frame locking piece is locked in the locking groove, and the frame is locked in the unfolded state; when the upper push handle is folded to the lower push rod, the upper push rod can drive the frame locking piece to be unlocked from the locking groove, and after unlocking, the push handle assembly, the front handrail assembly and the front supporting assembly can be folded to the rear supporting assembly. The folding electric bicycle has the advantages that the bicycle frame is convenient to fold and unfold, and the folded bicycle frame is small in size, small in occupied space and convenient to carry and store.

Description

Technical Field

[0001] The utility model relates to the technical field of baby strollers, in particular to a foldable frame and a baby stroller. Background Art

[0002] In order to make the baby stroller convenient to carry and store, the baby stroller is set to be foldable. When in normal use, the baby stroller is unfolded, and when storage or travel is needed, the baby stroller can be folded.

[0003] The existing foldable baby strollers mainly include a frame and a cloth cover, and the cloth cover is folded along with the folding of the frame. However, in the existing baby strollers, the operations of unfolding and folding the frame are troublesome, and there are many actions in the operation of the unfolding and folding linkage mechanism. Generally, the front armrest cannot be linked or the linkage structure adopts a connecting rod mechanism or the like, with a relatively complex structure, numerous parts and high cost. Moreover, the volume after folding is still relatively large, occupying a large space. Summary of the Utility Model

[0004] Aiming at the above deficiencies existing in the prior art, the technical problem to be solved by the utility model is to provide a foldable frame and a baby stroller with convenient folding operation and small occupied space after folding.

[0005] The technical solution adopted by the utility model to solve its technical problems is to provide a foldable frame with an unfolded state and a folded state, including:

[0006] A front support assembly, a rear support assembly, a front armrest assembly and a push handle assembly;

[0007] The front support assembly and the rear support assembly are rotatably connected, and a plurality of wheels are provided at the bottoms of both of them. A first gear portion is provided on the front support assembly;

[0008] The front armrest assembly is rotatably arranged on the rear support assembly, and a transmission gear and a locking groove are provided on the front armrest assembly;

[0009] The push handle assembly is rotatably arranged on the rear support assembly, including a rotatably connected upper push handle and a lower push rod, and the upper push handle can be rotatably folded onto the lower push rod; a frame locking member and a second gear portion are provided on the lower push rod, and the second gear portion meshes with the first gear portion and the transmission gear respectively;

[0010] When the frame is in the unfolded state, the frame locking member is locked in the locking groove to lock the frame in the unfolded state;

[0011] When the upper push handle is folded onto the lower push rod, the upper push rod can drive the frame locking member to unlock from the locking groove, and after unlocking, the push handle assembly, the front armrest assembly, and the front support assembly can all be folded onto the rear support assembly.

[0012] Further, when the second gear portion rotates, it can drive the transmission gear to rotate at a speed greater than that of the first gear portion.

[0013] Further, the number of teeth of the transmission gear is greater than the number of teeth on the first gear portion.

[0014] Further, a folding turntable is provided on the upper push handle, the folding turntable is rotatably arranged on the upper push handle, and the folding turntable is connected to the frame locking member by a wire;

[0015] A driving block is provided on the upper push handle. When the upper push handle is folded onto the lower push rod, the driving block pushes against the folding turntable to unlock the frame locking member from the locking groove.

[0016] Further, a side surface of the locking groove has an opening communicating therewith, the frame locking member can be disengaged from the locking groove along the opening, and the frame locking member can be locked into the locking groove along the opening.

[0017] Further, a seat assembly is further included, which is arranged on the rear support assembly. A front strut is provided on the front support assembly, and the seat assembly is rotatably connected to the front strut;

[0018] When the frame locking member is unlocked, the seat assembly can be folded onto the rear support assembly.

[0019] Further, a handle is provided on the seat assembly;

[0020] When the frame locking member is unlocked and the handle is lifted upwards, the push handle assembly, the front armrest assembly, the front support assembly, and the seat assembly can be folded onto the rear support assembly.

[0021] Further, a footrest adjustment assembly is provided on the front side of the seat assembly, a backrest assembly is provided on the rear side of the seat assembly, and both the footrest adjustment assembly and the backrest adjustment assembly are rotatably connected to the seat assembly;

[0022] When folding the frame, the footrest assembly can be rotated and folded downwards from the front, and the backrest assembly can be rotated and folded downwards from the rear.

[0023] Further, a basket assembly is further provided on the rear side of the seat assembly. The basket assembly includes a basket rod and a connecting member connected to the end of the basket rod, and the connecting member is rotatably connected to the rear support assembly;

[0024] The front armrest assembly is provided with a clamping groove. When the vehicle frame is in the unfolded state, the connecting piece is clamped in the clamping groove, and the rotational freedom degree of the connecting piece is restricted. When the front armrest assembly rotates and folds, the basket assembly disengages from the clamping groove, and the basket assembly can be rotated downward and folded onto the rear support assembly.

[0025] The technical solution adopted by the present utility model to solve its technical problems is to further propose a baby stroller, including the above-mentioned foldable vehicle frame.

[0026] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0027] In the present utility model, the lower push rod is provided with a second gear portion, and the second gear portion meshes and drives with the first gear portion on the front support assembly and the transmission gear on the front armrest assembly. When the upper push handle in the push handle assembly rotates and folds onto the lower push rod, it unlocks the vehicle frame locking piece, and the push handle assembly rotates backward and folds. During the folding process of the push handle assembly, the first gear portion and the transmission gear are meshed and driven through the second gear portion, so that the front armrest assembly, the front support assembly, and the push handle assembly can all be folded onto the rear support assembly. The folding operation is simple, and the one-lift-and-close folding is realized through the linkage relationship of gear transmission. The overall structure is simple, with few parts and low cost. On the contrary, the vehicle frame unfolding operation is also simple and can be unfolded with one key. And when the vehicle frame is folded, it is small and compact, occupies little space, is convenient for storage and transportation, and is also convenient for carrying the baby stroller onto the plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural view of the vehicle frame (in the unfolded state) of the baby stroller of the present utility model;

[0029] Figure 2 is Figure 1 a schematic structural view from another perspective;

[0030] Figure 3 is a schematic view of the vehicle frame folding process;

[0031] Figure 4 is an exploded schematic view of the push handle assembly;

[0032] Figure 5 is Figure 4 a schematic structural view from another perspective;

[0033] Figure 6 is a schematic view of the push handle assembly folding process;

[0034] Figure 7 is an exploded schematic view of the push plate assembly on the vehicle frame;

[0035] Figure 8 is Figure 7 a structural schematic diagram from another perspective;

[0036] Figure 9 is a schematic diagram of the folding process of the push handle assembly on the frame;

[0037] Figure 10 is an exploded schematic diagram of the seat assembly and the components connected thereto;

[0038] Figure 11 is a cross-sectional view of the frame along the first gear portion in the unfolded state;

[0039] Figure 12 is Figure 11 a structural schematic diagram after folding at a certain angle;

[0040] Figure 13 is a cross-sectional view of the frame along the transmission gear in the unfolded state;

[0041] Figure 14 is Figure 13 a structural schematic diagram after folding at a certain angle;

[0042] Figure 15 is a schematic diagram of the folding process of the basket assembly, push handle assembly, front armrest assembly and front support assembly.

[0043] In the figure:

[0044] 1. Front support assembly; 10. First gear portion; 11. Front strut; 120. Wheel;

[0045] 2. Rear support assembly;

[0046] 3. Front armrest assembly; 30. Lock groove; 301. Opening; 31. Transmission gear; 32. Card slot;

[0047] 4. Push handle assembly; 40. Upper push handle; 401. Driving block; 41. Lower push rod; 410. Second gear portion; 42. Frame locking member; 43. Folding turntable; 44. Cable; 45. Front awning rod assembly;

[0048] 5. Seat assembly; 50. Handle;

[0049] 6. Backrest assembly;

[0050] 7. Footrest adjustment assembly;

[0051] 8. Basket assembly; 81. Basket rod; 82. Connecting member. Detailed implementation method

[0052] The following are specific embodiments of the present utility model, in combination with the accompanying drawings, to further describe the technical solutions of the present utility model. However, the present utility model is not limited to these embodiments.

[0053] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indication will also change accordingly.

[0054] In addition, in the present utility model, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0055] In the present utility model, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0056] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0057] As Figures 1-5 shown, a foldable frame, specifically the frame of a baby stroller, has a deployed state and a folded state. The fabric cover on the frame can be folded and unfolded as the frame is folded and unfolded. Under normal use, the frame is in the deployed state. When not in use, the frame can be folded to reduce the space occupied by the frame. Among them, the foldable frame of this embodiment mainly includes: a front support assembly 1, a rear support assembly 2, a front armrest assembly 3, a push handle assembly 4, a seat assembly 5, a backrest assembly 6, a footrest adjustment assembly 7, and a basket assembly 8.

[0058] The front support assembly 1 and the rear support assembly 2 are both rotatably connected, and a plurality of wheels 120 are provided at the bottoms of both. The two wheels 120 at the bottom of the front support assembly 1 are universal wheels and can rotate 360 degrees to facilitate turning, while the two wheels 120 at the bottom of the rear support assembly 2 can only move forward and backward. And a first gear portion 10 is provided on the front support assembly 1. The first gear portion 10 is an incomplete gear and has a plurality of teeth. Specifically, there are two front support joints at both ends of the front support assembly 1, and the first gear portion 10 is provided at both front support joints.

[0059] The front armrest assembly 3 is rotatably provided on the rear support assembly 2, and a transmission gear 31 and a lock groove 30 are provided on the front armrest assembly 3. Specifically, in the state where the vehicle frame is unfolded and in use, the rotational freedom of the front armrest assembly 3 is restricted, so it cannot rotate. When the vehicle frame is unlocked, the rotational freedom of the front armrest assembly 3 is no longer restricted, and it can rotate relative to the rear support assembly 2 to facilitate folding the front armrest assembly 3. Two front armrest joints are respectively provided at the ends of the front armrest assembly 3, and the transmission gear 31 and the lock groove 30 are provided on both front armrest joints. The lock groove 30 is used for the vehicle frame locking member 42 to lock in. When the vehicle frame locking member 42 is inserted into the lock groove 30, the entire vehicle frame can be locked to ensure the structural stability of the vehicle frame when it is unfolded and in use.

[0060] The push handle assembly 4 is rotatably provided on the rear support assembly 2. Specifically, in the state where the vehicle frame is unfolded and in use, the rotational freedom of the push handle assembly 4 relative to the rear support assembly 2 is restricted (i.e., the vehicle frame locking member 42 locks the vehicle frame). When the vehicle frame is unlocked (the vehicle frame locking member 42 is unlocked), the rotational freedom of the push handle assembly 4 is no longer restricted, and the push plate assembly can rotate relative to the rear support assembly 2 to facilitate folding the push handle assembly 4. The push handle assembly 4 includes an upper push handle 40 and two parallel lower push rods 41 that are rotatably connected, and the upper push handle 40 can be rotatably folded onto the two lower push rods 41. A vehicle frame locking member 42 is movably provided on the lower push rod 41, and a second gear portion 410 is provided at its joint. The second gear portion 410 meshes with the first gear portion 10 and the transmission gear 31 respectively. Specifically, the second gear portion 410 is also an incomplete gear and has a plurality of teeth. The width of the second gear portion 410 is greater than the widths of the first gear portion 10 and the transmission gear 31. The first gear portion 10 and the transmission gear 31 are arranged side by side to facilitate meshing with the second gear portion 410. Further, the number of teeth of the transmission gear 31 is greater than the number of teeth on the first gear portion 10. Therefore, during the folding process of the vehicle frame, when the second gear portion 410 rotates, it can drive the transmission gear 31 to rotate at a speed greater than that of the first gear portion 10, that is, the speed at which the front armrest assembly 3 rotates downward and folds is greater than the speed at which the front support assembly 1 rotates downward and folds. Since the front armrest assembly 3 is above the front support assembly 1, by adjusting the number of teeth, the front armrest assembly 3 and the front support assembly 1 can be folded basically synchronously.

[0061] During use, when the frame is in the unfolded state, the frame locking member 42 is locked in the locking groove 30, and the push handle group is locked on the front armrest assembly 3. Since the second gear portion 410 in the push handle group meshes with the first gear portion 10 in the front support assembly 1, the front support assembly 1 is also locked accordingly. The frame locking member 42 locks the frame in the unfolded state, ensuring the structural stability during the use of the unfolded frame. When the upper push handle 40 is folded onto the lower push rod 41, the upper push rod can drive the frame locking member 42 to unlock from the locking groove 30. After unlocking, the frame is completely unlocked, and the push handle assembly 4, the front armrest assembly 3, and the front support assembly 1 can all be folded onto the rear support assembly 2.

[0062] In this embodiment, the lower push rod 41 is provided with a second gear portion 410, and the second gear portion 410 meshes and drives with the first gear portion 10 on the front support assembly 1 and the transmission gear 31 on the front armrest assembly 3. When the upper push handle 40 in the push handle assembly 4 rotates and folds onto the lower push rod 41, it unlocks the frame locking member 42, and the push handle assembly 4 rotates backward for folding. During the folding process of the push handle assembly 4, the first gear portion 10 and the transmission gear 31 are meshed and driven through the second gear portion 410, so that the front armrest assembly 3, the front support assembly 1, and the push handle assembly 4 can all be folded onto the rear support assembly 2, realizing one-key folding of the vehicle. The folding operation is simple. Conversely, the unfolding operation is also simple. And when the frame is folded, it is small in size, occupies little space, and is convenient for storage and transportation.

[0063] Specifically, as Figures 3-9 shown, the upper push handle 40 is provided with a folding turntable 43. The upper push handle 40 has a convex column, and the folding turntable 43 is rotatably arranged on the convex column of the upper push handle 40. A wire 44 is connected between the folding turntable 43 and the frame locking member 42. The upper push handle 40 is provided with a driving block 401. When the upper push handle 40 is folded onto the lower push rod 41, the driving block 401 pushes against the folding turntable 43 to unlock the frame locking member 42 from the locking groove 30. Among them, a side surface of the locking groove 30 has an opening 301 communicating therewith. The frame locking member 42 can be disengaged from the locking groove 30 along the opening 301, and the frame locking member 42 can be locked into the locking groove 30 along the opening 301. The lower push rod 41 is provided with a front awning rod assembly 45, and the front awning rod assembly 45 can be folded onto the push handle assembly 4.

[0064] During use, when the frame is in the unfolded state, the push handle assembly 4 is also in the unfolded state, and the upper push handle 40 and the lower push rod 41 are in the same straight line. There is a folding button on the upper push handle 40. Pressing the folding button can release the lock between the upper push handle 40 and the lower push rod 41. The upper push handle 40 rotates downward relative to the lower push rod 41. After rotating approximately ninety degrees (this angle can be adjusted as needed), the driving block 401 on the upper push handle 40 contacts the side surface of the folding turntable 43. When the upper push handle 40 continues to rotate, the driving block 401 will push against the folding turntable 43, causing the folding turntable 43 to rotate. The folding turntable 43 pulls the frame locking member 42 through the wire 44, causing the frame locking member 42 to move upward along the locking groove 30. When the upper push handle 40 is completely folded onto the lower push rod 41, the frame locking member 42 reaches near the opening 301, and the frame locking member 42 can disengage from the locking groove 30 at the opening 301. At this time, the frame is unlocked, and the frame can be switched to the folded state.

[0065] Furthermore, as Figures 10-15 shown, the foldable frame of this embodiment includes a seat assembly 5, which is arranged on the rear support assembly 2. A front strut 11 is provided on the front support assembly 1, and the seat assembly 5 is rotatably connected to the front strut 11. When the frame locking member 42 is unlocked, the seat assembly 5 can be folded onto the rear support assembly 2. Among them, a webbing handle 50 is provided on the seat assembly 5. When the frame locking member 42 is unlocked, lifting the webbing handle 50 can fold the push handle assembly 4, the front armrest assembly 3, the front support assembly 1, and the seat assembly 5 onto the rear support assembly 2. In addition, a footrest adjustment assembly 7 is provided on the front side of the seat assembly 5, and a backrest assembly 6 is provided on the rear side of the seat assembly 5. Both the footrest adjustment assembly 7 and the backrest adjustment assembly are rotatably connected to the seat assembly 5. When folding the frame, after the frame is unlocked, under their respective gravity, the footrest assembly can rotate downward and fold from the front, and the backrest assembly 6 can rotate downward and fold from the rear. Finally, the footrest assembly and the backrest assembly 6 both move closer to the rear support assembly 2 to complete the folding.

[0066] A basket assembly 8 is also provided on the rear side of the seat assembly 5. The basket assembly 8 includes a basket rod 81 and a connecting member 82 connected to the end of the basket rod 81. The connecting member 82 is rotatably connected to the rear support assembly 2. A card slot 32 is provided on the front armrest assembly 3. When the frame is in the unfolded state, the connecting member 82 is clamped in the card slot 32, and the rotational freedom of the connecting member 82 is restricted; when the front armrest assembly 3 rotates and folds, the basket assembly 8 disengages from the card slot 32, and the basket assembly 8 can rotate downward and fold onto the rear support assembly 2.

[0067] As Figure 6 、 Figure 9 and Figure 15 shown, the folding principle of the foldable frame of this embodiment is:

[0068] When the vehicle frame is in the unfolded state, the vehicle frame locking member 42 is locked in the locking slot 30 on the front armrest assembly 3, and the entire vehicle frame is in a locked state. When the frame needs to be folded, the front canopy rod assembly 45 is first folded onto the push handle assembly 4; then the upper push handle 40 is unlocked, and the upper push handle 40 rotates downward relative to the lower push rod 41. When the upper push plate is completely folded onto the lower push rod 41, the upper push plate pulls the pull wire 44 through the folding turntable 43, and the pull wire 44 pulls the frame locking member 42 to unlock and reach the position close to the opening 301, and the frame locking member 42 can be disengaged from the locking groove 30, so that the locking of the frame is released; the webbing handle 50 is lifted up, and under the action of gravity, the push handle assembly 4 rotates backward, and the second gear part 410 simultaneously engages the first gear part 10 and the transmission gear 31, so that the front armrest assembly 3 and the front support assembly 1 are both rotated and folded downward, and move closer to the rear support assembly 2; the webbing handle 50 is continued to be lifted up, and under the action of gravity, the seat cushion assembly rotates and folds, the backrest assembly 6 rotates and folds downward, and the basket assembly 8 rotates and folds downward until the frame is completely folded. On the contrary, the unfolding process of the frame of this embodiment is opposite to its folding process, which will not be described in detail here.

[0069] In this solution, the frame is easy to fold and unfold, and after folding, it is compact and occupies little space, making it easy to carry and store.

Claims

1. A collapsible frame, having a deployed state and a collapsed state, characterized in that, Comprising: a front support assembly, a rear support assembly, a front armrest assembly, and a push handle assembly; the front support assembly and the rear support assembly are rotatably connected to each other, and a plurality of wheels are provided at the bottoms of both of them, and a first gear portion is provided on the front support assembly; the front armrest assembly is rotatably provided on the rear support assembly, and a transmission gear and a locking groove are provided on the front armrest assembly; the push handle assembly is rotatably provided on the rear support assembly, and includes an upper push handle and a lower push rod that are rotatably connected to each other, and the upper push handle can be rotatably folded onto the lower push rod; a frame locking member and a second gear portion are provided on the lower push rod, and the second gear portion meshes with the first gear portion and the transmission gear respectively; when the frame is in the unfolded state, the frame locking member is locked in the locking groove to lock the frame in the unfolded state; when the upper push handle is folded onto the lower push rod, the upper push handle can drive the frame locking member to unlock from the locking groove, and after unlocking, the push handle assembly, the front armrest assembly, and the front support assembly can all be folded onto the rear support assembly; 2. The foldable frame according to claim 1, wherein, when the second gear portion rotates, it can drive the transmission gear to rotate at a speed greater than that of the first gear portion.

3. The foldable frame according to claim 1 or 2, characterized in that, the number of teeth of the transmission gear is greater than the number of teeth on the first gear portion.

4. The foldable frame according to claim 1, wherein, a folding turntable is provided on the upper push handle, the folding turntable is rotatably provided on the upper push handle, and the folding turntable is connected to the frame locking member through a wire; a driving block is provided on the upper push handle, and when the upper push handle is folded onto the lower push rod, the driving block pushes against the folding turntable to unlock the frame locking member from the locking groove.

5. The foldable frame according to claim 4, wherein, a side surface of the locking groove has an opening communicating therewith, and the frame locking member can be disengaged from the locking groove along the opening, and the frame locking member can be locked into the locking groove along the opening.

6. The foldable frame according to claim 1, wherein, further comprising a seat assembly provided on the rear support assembly, a front strut is provided on the front support assembly, and the seat assembly is rotatably connected to the front strut; when the frame locking member is unlocked, the seat assembly can be folded onto the rear support assembly.

7. The collapsible frame according to claim 6, wherein, a handle is provided on the seat assembly; when the frame locking member is unlocked, lifting the handle can cause the push handle assembly, the front armrest assembly, the front support assembly, and the seat assembly to be folded onto the rear support assembly.

8. The collapsible frame according to claim 6, wherein, a footrest adjustment assembly is provided on the front side of the seat assembly, a backrest assembly is provided on the rear side of the seat assembly, and both the footrest adjustment assembly and the backrest assembly are rotatably connected to the seat assembly; when folding the frame, the footrest adjustment assembly can be rotated and folded from the front downwards, and the backrest assembly can be rotated and folded from the rear downwards.

9. The foldable frame according to claim 6, wherein a basket assembly is further provided on the rear side of the seat assembly, the basket assembly includes a basket rod and a connecting member connected to the end of the basket rod, and the connecting member is rotatably connected to the rear support assembly; The front armrest assembly is provided with a card slot. When the vehicle frame is in the unfolded state, the connecting piece is clamped in the card slot, and the rotational freedom of the connecting piece is restricted; when the front armrest assembly rotates and folds, the basket assembly disengages from the card slot, and the basket assembly can rotate downward and fold onto the rear support assembly.

10. A baby stroller, characterized in that, Comprising a foldable vehicle frame according to any one of claims 1-9.

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