Collapsible child's vehicle frame

Abstract

The utility model discloses a child's car frame of coordinated collection and expansion can be between the unfolded use state and the folding use state corresponding switching use, including front foot pole, rear foot pole, push rod subassembly, car frame unlocking subassembly, seat connecting frame, handrail pole, handrail linkage piece, through the drive seat connecting frame corresponding folding action, seat connecting frame also through handrail linkage piece linkage handrail pole corresponding folding movement, so only need to drive seat connecting frame can linkage handrail pole corresponding action, effectively promote the operation convenience, simultaneously, when the child's car frame is in the unfolded use state, handrail linkage piece is in close contact with the inside of push rod subassembly, makes the child's car frame appearance structure neat, simple.

Description

[Technical Field]

[0001] This utility model relates to the field of children's travel products technology, and in particular to a children's bicycle frame that can be folded up and unfolded in a coordinated manner. [Background Technology]

[0002] Strollers are common products during a child's growth process. They can generally be unfolded or folded. When unfolded, they are used for children to ride in and out, while when folded, they are convenient to carry or store.

[0003] The structure of a stroller frame directly affects the ease of folding and the compactness of the folded size. Currently, there are various stroller frame linkage structures on the market, with different folding principles, but they all exhibit significant deficiencies in the coordination between unfolding and folding.

[0004] 1. The unfolding and folding of various functional components such as the seat and armrests are often independent of the folding process of the main frame. Users need to operate the frame lock and the seat / armrest folding separately, which is cumbersome and time-consuming, especially in the scenario of holding a baby with one hand, which can easily cause inconvenience.

[0005] 2. Although some products attempt to simplify operation through linkages, the unreasonable design of the linkage path often results in asynchronous opening and closing, affecting the reliability of use. At the same time, linkages such as the armrest linkage are often exposed on the outside of the frame when unfolded, causing bulges on the side of the frame, which in turn makes the overall external structure of the frame less concise and neat.

[0006] Therefore, this utility model was developed to address the aforementioned problems. [Utility Model Content]

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a child bicycle frame that can be folded and unfolded in a coordinated manner. By driving the seat connecting frame to fold and unfold accordingly, the seat connecting frame also moves in conjunction with the armrest linkage to fold and unfold accordingly. Therefore, only the seat connecting frame needs to be driven to move the armrest accordingly, which effectively improves the ease of operation. At the same time, when the child bicycle frame is in the unfolded state, the armrest linkage is close to the inside of the push rod assembly, making the child bicycle frame have a neat and simple external structure.

[0008] To address the aforementioned technical problems, this utility model provides a child stroller frame that can be folded and unfolded in a coordinated manner, allowing for switching between an unfolded and folded usage state, including:

[0009] The stroller includes a front leg 1, a rear leg 2, and a push rod assembly 3. The lower end of the push rod assembly 3 and the upper end of the front leg 1 are rotatably connected to the upper end of the rear leg 2, forming a frame joint 4. The frame joint 4 is configured to lock the stroller frame in an unfolded state.

[0010] The frame unlocking assembly 40 is mounted on the push rod assembly 3 and is linked to the frame joint 4.

[0011] Seat connecting frame 5, which is disposed between the front leg bar 1 and the rear leg bar 2, and can move accordingly as the front leg bar 1 retracts or extends relative to the rear leg bar 2;

[0012] Handrail 6, the rear part of which is hinged to push rod assembly 3 at pivot C;

[0013] The upper end of the armrest linkage component 61 is hinged to the rear end of the armrest bar 6 at pivot D, and the lower end of the armrest linkage component 61 is linked to the seat connecting frame 5. When the seat connecting frame 5 is extended or retracted, the armrest bar 6 is extended or retracted accordingly through the armrest linkage component 61.

[0014] When the stroller frame is in the unfolded state, the handlebar linkage 61 is abutted against the inside of the push rod assembly 3.

[0015] As described above, in a child stroller frame that can be retracted and extended in a coordinated manner, when the child stroller frame is in the extended state, the handlebar linkage 61 is parallel to and abuts against the inner side of the push rod assembly 3.

[0016] As described above, in a child stroller frame that can be retracted and extended in a coordinated manner, the handlebar 6 is hinged to the push rod assembly 3 via a handlebar connecting seat 60 at a pivot C; a handlebar blocking structure 62 is provided between the handlebar connecting seat 60 and the push rod assembly 3, and the handlebar blocking structure 62 is configured to block and limit the handlebar connecting seat 60 when the child stroller frame is in the extended use state.

[0017] As described above, in a child stroller frame that can be retracted and extended in coordination, the armrest blocking structure 62 includes an armrest blocking block 621 disposed on the push rod assembly 3, and the armrest blocking structure 62 also includes an armrest extension blocking part 622 disposed on the armrest connecting seat 60 and used to block and cooperate with the corresponding end of the armrest blocking block 621.

[0018] As described above, in the foldable and retractable children's bicycle frame, when the frame is in the folded state, the handlebar 6 is positioned upwards for the user to lift and use.

[0019] As described above, in a child stroller frame that can be folded and unfolded in a coordinated manner, the front part of the seat connecting frame 5 is movably connected to the front leg bar 1, and the rear part of the seat connecting frame 5 is movably connected to the rear leg bar 2; a seat linkage 51 is provided between the lower part of the seat connecting frame 5 and the push rod assembly 3, the lower end of the seat linkage 51 is hinged to the rear side of the seat connecting frame 5 at pivot A, and the upper end of the seat linkage 51 is hinged to the lower part of the push rod assembly 3 at pivot B; the lower end of the armrest linkage 61 is hinged to the upper part of the seat linkage 51 at pivot E.

[0020] As described above, in a child bicycle frame that can be folded and unfolded in a coordinated manner, the front part of the seat connecting frame 5 can be slidably and rotatably connected along the axial direction of the front leg bar 1, and the seat connecting frame 5, the rear leg bar 2, and the front leg bar 1 are connected to form a crank-slider mechanism.

[0021] As described above, in a child stroller frame that can be folded and unfolded in coordination, the front leg bar 1 is provided with a front leg groove 11 extending along its axial direction, and a seat frame guide slider 12 is slidably and rotatably connected in the front leg groove 11, and the seat frame guide slider 12 is connected to the front of the seat connecting frame 5.

[0022] As described above, in a child stroller frame that can be folded and unfolded in coordination, a seat elastic element 52 is provided between the rear side of the seat connecting frame 5 and the rear foot bar 2 to drive the seat connecting frame 5 to automatically fold and unfold.

[0023] As described above, a child bicycle frame that can be folded and unfolded in a coordinated manner includes a frame joint 4 comprising a front joint block 41 connected to the upper end of the front leg 1, a rear joint block 42 connected to the upper end of the rear leg 2, and a push rod joint block 43 connected to the lower end of the push rod assembly 3. The front joint block 41, the rear joint block 42, and the push rod joint block 43 are rotatably connected around a pivot F. The frame joint 4 also includes a frame locking assembly 44 disposed between the front joint block 41 and the push rod joint block 43 for locking the push rod joint block 43 relative to the front joint block 41. The frame locking assembly 44 is linked to the frame unlocking assembly 40.

[0024] As described above, in a child stroller frame that can be folded and unfolded in coordination, the rear joint block 42 is made of iron sheet, and the rear joint block 42 is connected to the upper end of the rear foot rod 2 via a rear connecting seat 21; the corresponding side wall of the front joint block 41 is provided with a receiving groove 411 for accommodating the rear joint block 42 and for allowing the front joint block 41 to rotate relative to the rear joint block 42; a frame blocking structure 45 is provided between the front joint block 41 and the rear joint block 42, and the frame blocking structure 45 is configured to block and limit the front joint block 41 when the child stroller frame is in the unfolded use state and / or folded use state.

[0025] As described above, a child bicycle frame that can be folded and unfolded together includes a frame unfolding blocking part 451 and / or a frame folding blocking part 452 provided on the corresponding side of the receiving groove 411 for blocking engagement with the corresponding end of the rear joint block 42.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. This utility model drives the seat connecting frame to fold accordingly, and the seat connecting frame also moves in conjunction with the armrest linkage to fold accordingly. Therefore, only the seat connecting frame needs to be driven to move the armrest accordingly, which effectively improves the ease of operation. At the same time, when the stroller frame is in the unfolded state, the armrest linkage is close to the inside of the push rod assembly, making the stroller frame's shape and structure neat and simple.

[0028] 2. The push rod assembly of this utility model coordinates the retraction and extension of the seat connecting frame and the armrest through the corresponding linkage of the seat linkage component and the armrest linkage component. That is, when the user unlocks the frame joint through the frame unlocking component and folds the push rod assembly, the folding action of the push rod assembly drives the seat connecting frame to retract synchronously through the seat linkage component. At the same time, the armrest linkage component naturally drives the armrest to fold along with the movement of the push rod assembly. Therefore, the user only needs to operate the push rod assembly to complete the synchronous retraction and extension of the frame body, seat connecting frame and armrest, which greatly improves the convenience of operation.

[0029] 3. When the stroller frame is folded, the seat connecting frame moves relative to the front leg and closes to the front leg, the armrest rotates relative to the push rod assembly and closes to the push rod assembly, and at the same time the front leg and push rod assembly close to the rear leg, thus realizing the folding of the entire stroller frame. Therefore, the folded stroller frame is small in size and easy to operate.

[0030] 4. When the stroller frame is in the unfolded state, the armrest blocking structure restricts the position of the armrest connecting seat, effectively strengthening the connection stability between the armrest and push rod assembly, ensuring safe and reliable use, and also serving as a positioning function when unfolded.

[0031] 5. To ensure smooth and stable movement of the seat connecting frame when folded or unfolded relative to the front leg bar, the seat connecting frame, the rear leg bar, and the front leg bar are connected to form a crank-slider mechanism.

[0032] 6. To facilitate the automatic folding of the seat connecting frame and improve ease of use, a seat elastic element is provided between the rear side of the seat connecting frame and the rear foot bar to drive the automatic folding movement of the seat connecting frame.

[0033] 7. By engaging the frame's unfolding blocking part with the corresponding end blocking of the rear joint block, the connection stability between the front and rear legs is effectively enhanced, preventing the front legs from wobbling relative to the rear legs, ensuring safe and reliable use, and also serving as an unfolding positioning effect. [Attached Image Description]

[0034] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0035] Figure 1 This is one of the perspective views of the present invention in its unfolded and usable state.

[0036] Figure 2 This is the second perspective view of the present invention in its unfolded and usable state.

[0037] Figure 3 This is a side view of the present invention in its unfolded and usable state.

[0038] Figure 4 This is a perspective view of the folding process of this utility model.

[0039] Figure 5 This is a side view of the folding process of this utility model.

[0040] Figure 6 This is a perspective view of the present invention in its folded and used state.

[0041] Figure 7 This is a side view of the present invention in its folded and used state.

[0042] Figure 8 This is an exploded view of the present invention.

[0043] Figure 9 This is one of the exploded views of the frame joint in this utility model.

[0044] Figure 10 This is the second exploded view of the frame joint in this utility model.

[0045] Figure 11 This is one of the exploded views of the handrail blocking structure in this utility model.

[0046] Figure 12 This is the second exploded view of the handrail blocking structure in this utility model.

[0047] Figure 13 This is a schematic diagram of the crank-slider mechanism formed by the connection of the seat connecting frame, the rear foot rod, and the front foot rod in this utility model.

Detailed Implementation Methods

[0048] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0049] like Figures 1-13As shown, this utility model discloses a children's bicycle frame that can be folded and unfolded in coordination, which can be switched between unfolded and folded use states. It includes a front leg bar 1, a rear leg bar 2, a push rod assembly 3, a frame unlocking assembly 40, a seat connecting frame 5, an armrest bar 6, and an armrest linkage component 61. The lower end of the push rod assembly 3 and the upper end of the front leg 1 are rotatably connected to the upper end of the rear leg 2, forming a frame joint 4. The frame joint 4 is configured to lock the stroller frame in the unfolded state. The frame unlocking assembly 40 is located on the push rod assembly 3 and is linked to the frame joint 4. The seat connecting frame 5 is located between the front leg 1 and the rear leg 2 and can move accordingly when the front leg 1 is extended or retracted relative to the rear leg 2. The rear part of the armrest 6 is hinged to the push rod assembly 3 at pivot C. The upper end of the armrest linkage 61 is hinged to the rear end of the armrest 6 at pivot D. The lower end of the armrest linkage 61 is linked to the seat connecting frame 5, and when the seat connecting frame 5 is extended or retracted, the armrest 6 is extended or retracted accordingly through the armrest linkage 61. When the stroller frame is in the unfolded state, the armrest linkage 61 is against the inside of the push rod assembly 3. This invention enables the seat connecting frame to fold and retract, and the seat connecting frame also folds and retracts in conjunction with the armrest linkage component. Therefore, only the seat connecting frame needs to be driven to trigger the armrest linkage, effectively improving the ease of operation. At the same time, when the stroller frame is in the unfolded state, the armrest linkage component is close to the inside of the push rod assembly, making the stroller frame's external structure neat and simple.

[0050] Preferably, when the stroller frame is in the unfolded state, the armrest linkage 61 is parallel to and abuts against the inner side of the push rod assembly 3. The armrest, armrest linkage, seat linkage, and push rod assembly are connected to form a four-bar linkage mechanism, which makes the armrest extension and retraction movements definite and reduces the difficulty of operation.

[0051] like Figure 11 , 12 As shown, the armrest 6 is hinged to the push rod assembly 3 via an armrest connecting seat 60 at pivot C. An armrest blocking structure 62 is provided between the armrest connecting seat 60 and the push rod assembly 3. The armrest blocking structure 62 is configured to block and limit the armrest connecting seat 60 when the stroller frame is in the unfolded state. Specifically, the armrest blocking structure 62 includes an armrest blocking block 621 on the push rod assembly 3, and an armrest unfolding blocking part 622 on the armrest connecting seat 60 for blocking and engaging with the corresponding end of the armrest blocking block 621. When the stroller frame is in the unfolded state, the armrest blocking structure effectively strengthens the connection stability between the armrest and the push rod assembly by constraining the position of the armrest connecting seat, ensuring safe and reliable use, and also providing an unfolding positioning effect.

[0052] like Figure 6 , 7As shown, when the stroller frame is in the folded state, the handlebar 6 is positioned upwards for the user to lift. This makes it convenient for the user to lift the stroller frame without the need for an additional lifting structure. The design is reasonable and easy to use.

[0053] like Figures 1-8 As shown, the front part of the seat connecting frame 5 is movably connected to the front leg bar 1, and the rear part of the seat connecting frame 5 is movably connected to the rear leg bar 2; a seat linkage 51 is provided between the lower part of the seat connecting frame 5 and the push rod assembly 3, the lower end of the seat linkage 51 is hinged to the rear side of the seat connecting frame 5 at pivot A, and the upper end of the seat linkage 51 is hinged to the lower part of the push rod assembly 3 at pivot B; the lower end of the armrest linkage 61 is hinged to the upper part of the seat linkage 51 at pivot E. This utility model's push rod assembly coordinates the retraction and extension of the seat connecting frame and armrest through the corresponding linkage of the seat linkage and armrest linkage. That is, when the user unlocks the frame joints using the frame unlocking assembly and folds the push rod assembly, the folding action of the push rod assembly synchronously drives the seat connecting frame to fold through the seat linkage. At the same time, the armrest linkage naturally folds along with the movement of the push rod assembly. Therefore, the user only needs to operate the push rod assembly to complete the synchronous retraction and extension of the frame body, seat connecting frame, and armrest, greatly improving the ease of operation. In addition, when the children's bicycle frame is in the unfolded state, the armrest linkage is close to the inside of the push rod assembly, making the children's bicycle frame structure neat and simple, and minimizing the size of the children's bicycle frame when folded.

[0054] Preferably, the seat linkage component 51 and the armrest linkage component 61 are rigid plates, such as iron plates, to ensure stable and reliable linkage.

[0055] like Figures 1-8 As shown in Figure 13, to ensure smooth and stable movement of the seat connecting frame when folded or unfolded relative to the front leg, the rear side of the seat connecting frame 5 is pivotally connected to the rear leg 2. The front part of the seat connecting frame 5 is slidably and rotatably connected along the axial direction of the front leg 1. The seat connecting frame 5, the rear leg 2, and the front leg 1 are connected to form a crank-slider mechanism. Specifically, the front leg 1 is provided with a front leg groove 11 extending along its axial direction. A seat frame guide slider 12 is slidably and rotatably connected in the front leg groove 11, and the seat frame guide slider 12 is connected to the front part of the seat connecting frame 5.

[0056] like Figures 1-8 As shown, to facilitate the automatic folding of the seat connecting frame and improve ease of use, a seat elastic element 52 is provided between the rear side of the seat connecting frame 5 and the rear leg bar 2 to drive the automatic folding movement of the seat connecting frame 5. Specifically, the seat elastic element 52 is a torsion spring, which is sleeved on a pivot between the rear side of the seat connecting frame 5 and the rear leg bar 2. One end of the torsion spring is connected to the rear side of the seat connecting frame, and the other end is connected to the rear leg bar.

[0057] likeFigures 1-10 As shown, for reliable connection and locking, the frame joint 4 includes a front joint block 41 connected to the upper end of the front leg 1, a rear joint block 42 connected to the upper end of the rear leg 2, and a push rod joint block 43 connected to the lower end of the push rod assembly 3. The front joint block 41, rear joint block 42, and push rod joint block 43 are rotatably connected around a pivot F. The frame joint 4 also includes a frame locking assembly 44 disposed between the front joint block 41 and the push rod joint block 43 for locking the push rod joint block 43 relative to the front joint block 41. The frame locking assembly 44 is linked with the frame unlocking assembly 40. Specifically, the push rod assembly includes a lower push rod connected to the push rod joint block 43 at its lower end and an upper push rod rotatably connected to the lower push rod. An upper push rod locking assembly is provided between the upper push rod and the lower push rod. The frame unlocking assembly includes an upper push rod unlocking group disposed on the upper push rod and a joint unlocking group disposed between the upper push rod and the lower push rod and linked with the frame locking assembly 44. The structures of the upper push rod locking assembly, upper push rod unlocking assembly, joint unlocking assembly, and frame locking assembly 44 in this utility model can be found in the relevant structure of a children's stroller frame with application number 202510085604 9, and will not be described in detail here.

[0058] like Figures 1-10 As shown, in order to ensure reliable connection and compact frame joint structure, the rear joint block 42 is made of iron sheet and is connected to the upper end of the rear foot rod 2 through the rear connecting seat 21; the corresponding side wall of the front joint block 41 is provided with a receiving groove 411 for accommodating the rear joint block 42 and for allowing the front joint block 41 to rotate relative to the rear joint block 42, and the receiving groove 411 has an avoidance notch.

[0059] like Figures 1-10 As shown, a frame blocking structure 45 is provided between the front joint block 41 and the rear joint block 42. The frame blocking structure 45 is configured to block and limit the front joint block 41 when the child bicycle frame is in the unfolded and / or folded use state. Specifically, the frame blocking structure 45 includes an unfolding blocking part 451 and / or a folding blocking part 452 provided on the corresponding edge of the receiving groove 411 for blocking and engaging with the corresponding end of the rear joint block 42. By the frame unfolding blocking part engaging with the corresponding end of the rear joint block, the connection stability between the front and rear legs is effectively enhanced, preventing the front legs from wobbling relative to the rear legs, ensuring safe and reliable use, and also achieving the effect of unfolding positioning. By the frame folding blocking part 452 engaging with the corresponding end of the rear joint block, the effect of folding positioning is achieved.

Claims

1. A child bicycle frame that can be folded up and down in a coordinated manner, capable of switching between an unfolded and folded usage state, characterized in that... include: The front leg (1), the rear leg (2) and the push rod assembly (3) are provided. The lower end of the push rod assembly (3) and the upper end of the front leg (1) are rotatably connected to the upper end of the rear leg (2) to form a frame joint (4). The frame joint (4) is configured to lock the child bike frame in an unfolded use state. A frame unlocking assembly (40) is mounted on a push rod assembly (3) and is linked to the frame joint (4). Seat connecting frame (5), which is located between the front leg bar (1) and the rear leg bar (2), and can move accordingly when the front leg bar (1) retracts or extends relative to the rear leg bar (2); Handrail (6), the rear of which is hinged to the push rod assembly (3) at pivot C; The upper end of the armrest linkage component (61) is hinged to the rear end of the armrest rod (6) at pivot D, and the lower end of the armrest linkage component (61) is linked to the seat connecting frame (5). When the seat connecting frame (5) is extended or retracted, the armrest rod (6) is extended or retracted accordingly through the armrest linkage component (61). When the stroller frame is in the unfolded state, the armrest linkage (61) is against the inside of the push rod assembly (3).

2. The child bicycle frame that can be retracted and extended in accordance with claim 1, characterized in that... When the stroller frame is in the unfolded state, the armrest linkage (61) is parallel to the inside of the push rod assembly (3).

3. The child bicycle frame that can be retracted and unfolded in accordance with claim 1, characterized in that... The armrest (6) is hinged to the push rod assembly (3) at pivot C via the armrest connecting seat (60); an armrest blocking structure (62) is provided between the armrest connecting seat (60) and the push rod assembly (3), and the armrest blocking structure (62) is configured to block and limit the armrest connecting seat (60) when the stroller frame is in the unfolded use state.

4. The child bicycle frame that can be retracted and unfolded in accordance with claim 1, characterized in that... When the stroller frame is in the folded-down state, the handlebar (6) is positioned upwards for the user to lift and use.

5. A child bicycle frame that can be retracted and unfolded in accordance with any one of claims 1-4, characterized in that... The front part of the seat connecting frame (5) is movably connected to the front leg rod (1), and the rear part of the seat connecting frame (5) is movably connected to the rear leg rod (2); a seat linkage (51) is provided between the seat connecting frame (5) and the lower part of the push rod assembly (3), the lower end of the seat linkage (51) is hinged to the rear side of the seat connecting frame (5) at pivot A, and the upper end of the seat linkage (51) is hinged to the lower part of the push rod assembly (3) at pivot B; the lower end of the armrest linkage (61) is hinged to the upper part of the seat linkage (51) at pivot E.

6. The child bicycle frame that can be retracted and extended in accordance with claim 5, characterized in that... The front part of the seat connecting frame (5) can be slidably and rotatably connected along the axial direction of the front leg rod (1), and the seat connecting frame (5), the rear leg rod (2), and the front leg rod (1) are connected to form a crank-slider mechanism.

7. The child bicycle frame that can be retracted and extended in accordance with claim 6, characterized in that... The front foot rod (1) is provided with a front foot groove (11) extending along its axial direction. A seat frame guide slider (12) is slidably and rotatably connected in the front foot groove (11). The seat frame guide slider (12) is connected to the front of the seat connecting frame (5).

8. The child bicycle frame that can be retracted and unfolded in accordance with claim 5, characterized in that... A seat elastic element (52) is provided between the rear side of the seat connecting frame (5) and the rear foot bar (2) for driving the seat connecting frame (5) to automatically fold.

9. The child bicycle frame that can be retracted and unfolded in accordance with claim 1, characterized in that... The frame joint (4) includes a front joint block (41) connected to the upper end of the front foot bar (1), a rear joint block (42) connected to the upper end of the rear foot bar (2), and a push rod joint block (43) connected to the lower end of the push rod assembly (3). The front joint block (41), the rear joint block (42), and the push rod joint block (43) are rotatably connected around a pivot F. The frame joint (4) also includes a frame locking assembly (44) disposed between the front joint block (41) and the push rod joint block (43) for locking the push rod joint block (43) relative to the front joint block (41). The frame locking assembly (44) is linked to the frame unlocking assembly (40).

10. The child bicycle frame that can be retracted and extended in accordance with claim 9, characterized in that... The rear joint block (42) is an iron sheet, and the rear joint block (42) is connected to the upper end of the rear foot rod (2) through the rear connecting seat (21); the corresponding side wall of the front joint block (41) is provided with a receiving groove (411) for accommodating the rear joint block (42) and for allowing the front joint block (41) to rotate relative to the rear joint block (42); a frame blocking structure (45) is provided between the front joint block (41) and the rear joint block (42), and the frame blocking structure (45) is configured to block and limit the front joint block (41) when the child bicycle frame is in the unfolded use state and / or folded use state; the frame blocking structure (45) includes a frame unfolding blocking part (451) and / or a frame folding blocking part (452) provided on the corresponding side of the receiving groove (411) and for blocking and cooperating with the corresponding end of the rear joint block (42).

Images