Stroller frame

Abstract

The utility model discloses a child's pushchair framework, including rear support, rear support upper end fixedly arranged with rear support, and rear support lower end is equipped with rear wheel, and rear support is connected with the connecting seat of opposite rotation, and rear support still is connected with the push -rod seat of opposite rotation, and push -rod seat upper fixedly arranged with push -rod subassembly, and child's pushchair framework still includes front support, and front support lower end is equipped with front wheel, and front support upper end stretches into connecting seat and can slide relative connecting seat, and front support upper rotatory joint has the support rod of can support seat, and support rod rear end is swinged to connect with rear support or rear support and makes front support relative connecting seat slide down when can drive rear support to the front support close together, and, and push -rod subassembly with front support between being equipped with the drive subassembly of push -rod subassembly relative rear support rotation and can drive front support relative connecting seat slide down when the front support close together, the utility model discloses simple structure, and the nimble folding.

Description

Technical Field

[0001] This utility model relates to a children's stroller frame. Background Technology

[0002] Strollers are a common product during a child's growth. Most current strollers can be unfolded or folded; when unfolded, they provide a comfortable ride for children, while when folded, they are easy to carry or store. However, the structures and folding principles of stroller frames on the market vary considerably. Therefore, this invention provides a novel stroller frame that differs from existing ones. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a simple and flexible stroller frame.

[0004] This utility model is achieved through the following technical solution:

[0005] The stroller frame, which can move from an unfolded position to a folded position after the locking device is unlocked, includes a rear support. A rear support is fixedly mounted on the upper end of the rear support, and a rear wheel is mounted on the lower end of the rear support. A connecting seat that can rotate relative to the rear support is connected to the rear support, and a push rod seat that can rotate relative to it is also connected to the rear support. A push rod assembly is fixedly mounted on the push rod seat. The stroller frame also includes a front support. A front wheel is mounted on the lower end of the front support, and the upper end of the front support extends into the connecting seat and can slide relative to the connecting seat. A support rod that can support the seat is rotatably connected to the front support. The rear end of the support rod is movably connected to the rear support or the rear support, so that when the front support slides downward relative to the connecting seat, it can drive the rear support to move towards the front support. Furthermore, a drive assembly is provided between the push rod assembly and the front support, which can drive the front support to slide downward relative to the connecting seat when the push rod assembly rotates relative to the rear support and moves towards the front support.

[0006] The rear end of the support rod is rotatably connected to the rear support and offset from the rotation axis of the rear support and the connecting seat.

[0007] The lower end of the push rod assembly is fixedly provided with a connecting rod that passes through the rear support and the connecting seat.

[0008] The drive assembly includes a gear fixed on the connecting rod and located in the connecting seat, and a rack that meshes with the gear is provided at the upper end of the front bracket.

[0009] The connecting seat is provided with a transverse guide shaft, and the upper end of the front bracket is provided with a guide groove for the guide shaft to pass through.

[0010] The rear support has two members, and the corresponding two rear supports are located on the outside of the connecting seat. The push rod assembly includes two push rods, and the upper ends of the two push rods are provided with crossbars connecting them. The lower ends of the push rods are fixedly connected to push rod seats. The corresponding two push rod seats are located on the outside of the rear supports. The two ends of the connecting rod are fixedly connected to the push rods. The front support is one member, and its upper end is slidably connected to the connecting seat. The lower end of the front support is provided with a transverse crossbar. The two ends of the crossbar are respectively provided with the front wheels. The support rod has two members, and the support rod is rotatably connected to the front support near its rear end. The rear end of the support rod is rotatably connected to the rear support and is offset from the rotation axis of the rear support and the connecting seat.

[0011] The rear support has a recessed groove on its outer circumferential surface. The rear end of the support rod extends into the recessed groove and is rotatably connected to the rear support. When the stroller frame is unfolded, the outer wall of the support rod abuts against the groove wall.

[0012] The push rod includes a lower rod fixedly connected to the push rod seat and an upper rod that can slide and extend relative to the lower rod. The crossbar is connected to the upper end of the upper rod. The locking device includes a first locking structure located between the rear support and the push rod seat, and a second locking structure located between the upper rod and the lower rod. The first locking structure includes a slot laterally located on the rear support. The push rod seat has a locking member that can slide laterally within it and engage or disengage from the slot. The lower rod has a fixed seat. The fixed seat has a sliding block that can be impacted by the lower end of the upper rod and slide when the upper rod slides downward. A roller is also connected to the fixed seat. A first pull rope is provided between the sliding block and the locking member, passing around the roller and pulling the locking member to disengage from the slot when the sliding block slides downward. A first return spring is provided between the fixed seat and the sliding block to push the sliding block back to its original position. A second return spring is provided between the push rod seat and the locking member to push the locking member back to its original position.

[0013] The second locking structure includes a locking hole on the lower rod, a locking seat fixedly installed inside the upper rod, a locking pin inside the locking seat that can move laterally to engage or disengage with the locking hole, a driving rod inside the locking seat that can move up and down along the upper rod and can disengage the locking pin from the locking hole when moving upward, an unlocking block in the middle of the crossbar, a second pull rope between the unlocking block and the driving rod that can pull the driving rod upward when the unlocking block is moved, a third return spring inside the upper rod that can push the driving rod back to its original position when the unlocking block is released, a fourth return spring between the locking seat and the locking pin that can push the locking pin back to its original position, and a fifth return spring between the crossbar and the unlocking block that can push the unlocking block back to its original position.

[0014] The crossbar is also connected to a pressable button. The front end of the button is provided with a blocking part. The unlocking block is provided with a blocking surface that can abut against the blocking part to prevent the unlocking block from moving. The unlocking block is also provided with a relief groove. When the button is pressed, the blocking part disengages from the blocking surface and the relief groove is opposite to the button, so that the unlocking block can be operated and moved. The crossbar is provided with a sixth return spring that can push the button to reset.

[0015] Compared with the prior art, the present invention has the following advantages: When the stroller frame of the present invention is folded, the push rod assembly is rotated forward to move towards the front support. The drive assembly between the push rod assembly and the front support drives the front support to slide downward relative to the connecting seat. During the downward sliding process, the front support pulls the rear support to rotate towards the front support through the support rod, thereby realizing the folding of the entire stroller frame. The entire folding process is flexible and reliable, and the structure of the entire stroller frame is also very simple. Attached Figure Description

[0016] Figure 1 This is a perspective view of the utility model;

[0017] Figure 2 This is one of the perspective views of the components of this utility model;

[0018] Figure 3 This is a side view of the present invention;

[0019] Figure 4 This is a partial cross-sectional view of the present invention in its unfolded state;

[0020] Figure 5 This is a side view of the present invention during the folding process;

[0021] Figure 6 This is a perspective view of the present invention in a folded state;

[0022] Figure 7 This is a partial cross-sectional view of the present invention in its folded state;

[0023] Figure 8 This is one of the exploded views of the components of this utility model;

[0024] Figure 9 This is an exploded view of the present invention;

[0025] Figure 10 yes Figure 9 A magnified view at point C;

[0026] Figure 11 yes Figure 9 Enlarged view at point B;

[0027] Figure 12 yes Figure 8Enlarged view of point A in the middle;

[0028] Figure 13 This is the second exploded view of a component of this utility model. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] like Figures 1 to 7 As shown, this embodiment provides a foldable stroller frame. After the locking device is unlocked, the stroller frame can be opened from the unfolded position (e.g., Figure 1 , Figure 2 (As shown) Move to the folded position (as shown) Figure 6 As shown in the figure, this greatly reduces storage and transportation space.

[0031] like Figures 1 to 7 As shown, the stroller frame includes a rear support 1. In this embodiment, there are two rear supports 1, each with a rear support 11 fixedly mounted at its upper end and a rear wheel 12 mounted at its lower end. The rear support 11 is connected to a connecting seat 2 that can rotate relative to it. Specifically, an arc-shaped groove 22 is provided on the connecting seat 2 along its circumference, and a guide pin 14 that can be inserted into the arc-shaped groove 22 is provided on the rear support 11. The cooperation between the guide pin 14 and the arc-shaped groove 22 allows relative rotation between the rear support 11 and the connecting seat 2 while limiting its range of rotation. In this embodiment, the connecting seat 2 is positioned between the two rear supports 11.

[0032] like Figure 1 , Figure 2 as well as Figures 8 to 10 As shown, each of the rear supports 11 is also connected to a push rod seat 3 that can rotate relative to it. Similarly, an arc-shaped groove 31 is provided on the push rod seat 3 along the circumferential direction, and a guide block 15 that can be inserted into the arc-shaped groove 31 is provided on the rear support 11. Through the cooperation between the guide block 15 and the arc-shaped groove 31, the relative rotation between the push rod seat 3 and the rear support 11 is guided and limited.

[0033] like Figures 1 to 7As shown, a push rod assembly 4 is fixedly mounted on the push rod base 3. The push rod assembly 4 includes two push rods 41 respectively fixedly connected to the left and right push rod bases 3, and a crossbar 42 connected to the upper ends of the two push rods 41. A handle 416 extending forward is provided on the crossbar 42 for easy pushing by the user. A connecting rod 8 is fixedly mounted on the lower end of the push rod assembly 4. The two ends of the connecting rod 8 are fixedly connected to the left and right push rods 41 respectively, and the connecting rod 8 passes through the corresponding rear support 11 and connecting seat 2. In this embodiment, the push rod 41 includes a lower rod 411 fixedly connected to the push rod base 3 and an upper rod 412 that can slide and extend relative to the lower rod 411. The crossbar 42 is connected to the upper end of the upper rod 412. The upper rod 412 and the lower rod 411 can extend or retract relative to each other, making it convenient for the user to push the stroller and easy to store in a small volume.

[0034] like Figures 1 to 7 As shown, the stroller frame also includes a front support 5, which is a single unit with a horizontal crossbar 53 at its lower end. Front wheels 51 are mounted on both ends of the crossbar 53. The upper end of the front support 5 extends into the connecting seat 2 and can slide up and down relative to the connecting seat 2. To facilitate sliding, a horizontal guide shaft 21 is provided on the connecting seat 2, and a guide groove 52 is provided on the upper end of the front support 5 for the guide shaft 21 to pass through.

[0035] like Figures 1 to 7 As shown, a support rod 6 for supporting the seat is rotatably connected to the front support 5. The front end of the support rod 6 is used to support the seat (not shown in the figure). There are two support rods 6, corresponding to the left and right sides respectively. Each support rod 6 is rotatably connected to the front support 5 near its rear end. The rear end of the support rod 6 is rotatably connected to the rear support 11, and this connection point is offset from the rotation axis of the rear support 11 and the connecting seat 2. Preferably, a recessed groove 13 is provided on the outer peripheral surface of the rear support 11, and the rear end of the support rod 6 extends into this recessed groove 13 to achieve a rotatable connection with the rear support 11. When the stroller frame is in the unfolded state, the outer wall of the support rod 6 abuts against the groove wall of the recessed groove 13, thereby providing stable support. Of course, the rear end of the support rod 6 can also be rotatably connected to the rear support 1. A flexible, foldable seat can be attached to the stroller frame for use as a seat. The flexible seat can be attached to the push rod assembly 4, and the front end of the seat is connected to the front end of the support rod 6 and supported by the support rod 6. The flexible seat is existing technology and is not the focus of this utility model, so it will not be described here.

[0036] like Figure 4 , Figure 7 and Figure 8As shown, a drive assembly 7 is provided between the push rod assembly 4 and the front support 5. This drive assembly 7 converts the rotational motion of the push rod assembly 4 into the sliding motion of the front support 5 during folding. This allows the push rod assembly 4 to rotate relative to the rear support 11 and move towards the front support 5, driving the front support 5 to slide downwards relative to the connecting seat 2. Furthermore, when the front support 5 slides downwards relative to the connecting seat 2, it can also drive the rear support 1 towards the front support 5 via the support rod 6. The drive assembly 7 includes a gear 71 fixedly mounted on the connecting rod 8 and located inside the connecting seat 2, and a rack 72 mounted on the upper end of the front support 5 and meshing with the gear 71.

[0037] Folding principle: such as Figures 1 to 8 As shown, when the stroller frame needs to be folded, first operate the locking device to unlock it. Then, the user pushes the push rod assembly 4 forward, causing the push rod assembly 4, push rod seat 3, connecting rod 8, and gear 71 to rotate together relative to the rear support 11 and connecting seat 2. The push rod assembly 4 moves closer to the front bracket 1. During this process, the rotation of gear 71 drives the meshing rack 72 to move. Since rack 72 is fixed on the front bracket 5, the front bracket 5 slides downward relative to the connecting seat 2. At this time, guide groove 52 and guide shaft 21 play a guiding and limiting role, making the front bracket 5 slide smoothly. The downward sliding of the front bracket 5 will pull the support rod 6 through its rotational connection point with the support rod 6. Since the rear end of the support rod 6 is rotated at a position offset from the rotation axis of the rear support 11, the support rod 6 is pulled by the front bracket 5, forcing the rear support 11 to rotate forward relative to the connecting seat 2, thereby causing the rear bracket 1 to also move closer to the front bracket 5. Finally, under the linkage of drive component 7, the front bracket 5, rear bracket 1, and push rod assembly 4 retract into each other, achieving the desired effect. Figure 6 The image shows a compact folded state. The entire folding process can be completed with one hand, the folding is smooth, and the structure is compact after folding.

[0038] like Figure 1 , Figure 3 as well as Figures 8 to 13 As shown, to ensure the stability of the stroller frame during use, this embodiment is equipped with a reliable locking device. This locking device includes a first locking structure 91 located between the rear support 11 and the push rod seat 3, and a second locking structure 92 located between the lower rod 411 and the upper rod 412.

[0039] like Figure 8 , Figure 9 , Figure 10 and Figure 12As shown, the first locking structure 91 is used to lock the relative position of the push rod assembly 4 and the rear support 1. A slot 911 is provided laterally on the rear support 11. A locking member 912 that can slide laterally inside the push rod seat 3 is provided. In the unfolded state, the elastic force of the second return spring 916 pushes the locking member 912 into the slot 911 of the rear support 11 to achieve locking. At this time, the push rod assembly 4 cannot rotate relative to the rear support 11. A fixed seat 413 is provided inside the lower rod 411. A sliding block 913 is provided inside the fixed seat 413, which can slide downward by being hit by the lower end of the upper rod 412 when the upper rod 412 slides downward and retracts. A roller 414 is connected to the fixed seat 413. A first pull rope 914 is connected between the sliding block 913 and the locking member 912. The first pull rope 914 passes around the roller 414. When the upper rod 412 slides downward relative to the lower rod 411, its lower end will strike the sliding block 913, causing it to overcome the elastic force of the first return spring 915 and move downward. The downward movement of the sliding block 913 pulls the first pull rope 914, thereby pulling the locking member 912 through the first pull rope 914, causing it to overcome the elastic force of the second return spring 916 and disengage from the slot 911, thus unlocking the first locking structure 91.

[0040] like Figure 9 , Figure 11 and Figure 12 As shown, the second locking structure 92 is used to lock the telescopic function of the push rod 41. A locking hole 921 is provided on the lower rod 411, and a locking seat 415 is fixed inside the upper rod 412. The locking seat 415 contains a locking pin 922 that can move laterally under the action of the fourth return spring 927. When the upper rod 412 is pulled out to a suitable length, the locking pin 922 engages with the locking hole 921 under the spring force, thus locking the rod. The locking seat 415 also contains a drive rod 923 that can move up and down along the upper rod 412. An unlocking block 924 is provided in the middle of the crossbar 42, and the unlocking block 924 is connected to the drive rod 923 via a second pull rope 925. When the operator moves the unlocking block 924, the second pull rope 925 pulls the drive rod 923 upward. The drive rod 923 then drives the latch 922 to move laterally, overcoming the force of the fourth return spring 927 and disengaging it from the locking hole 921, thus unlocking the device. This allows the upper rod 412 to retract. After releasing the unlocking block 924, the drive rod 923 and the unlocking block 924 return to their original positions under the action of the third return spring 926 and the fifth return spring 928. The drive rod 923 and the latch 922 can be fitted with an inclined plane to convert the longitudinal movement of the drive rod 923 into the lateral movement of the latch 922.

[0041] like Figure 13As shown, to prevent accidental unlocking, a pressable button 930 is connected to the crossbar 42. The button 930 has a blocking part 931 at its front end. In the normal state, the sixth return spring 932 causes the button 930 to pop out. At this time, the blocking part 931 abuts against the blocking surface 929 on the unlocking block 924, preventing the unlocking block 924 from being moved accidentally and preventing accidental locking. Only when the button 930 is pressed, causing the blocking part 931 to disengage from the blocking surface 929, and the button 930 aligns with the clearance groove 920 on the unlocking block 924, is the unlocking block 924 no longer blocked and can then be moved. This achieves a two-step unlocking operation of "pressing the button 930 first, then pushing the unlocking block 924," improving security.

[0042] In addition, such as Figure 3 and Figure 5 As shown, a lifting ring 101 can also be rotatably connected to the connecting seat 2. When folding the stroller frame, the user only needs to hold the unlocking block 924, first press the button 930 with the thumb, and then hold the unlocking block 924 with the other four fingers. At this time, the second locking structure 92 is unlocked. Then, apply a downward pushing force, and the upper rod 412 slides into the lower rod 411. The lower end of the upper rod 412 hits the sliding block 913, thereby unlocking the first locking structure 91. At this time, push the crossbar 42 forward, so that the push rod assembly 4 rotates forward. Finally, lift the lifting ring 101. The entire folding operation can be completed with only one hand, which is very convenient and quick.

[0043] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A stroller frame that can move from an unfolded position to a folded position after the locking device is unlocked, characterized in that: The stroller includes a rear support (1), with a rear support (11) fixedly mounted on the upper end of the rear support (1) and a rear wheel (12) mounted on the lower end of the rear support (1). The rear support (11) is connected to a connecting seat (2) that can rotate relative to it. The rear support (11) is also connected to a push rod seat (3) that can rotate relative to it. A push rod assembly (4) is fixedly mounted on the push rod seat (3). The stroller frame also includes a front support (5), with a front wheel (51) mounted on the lower end of the front support (5). The upper end of the front support (5) extends into the connecting seat (2) and can rotate relative to it. The connecting seat (2) slides, and the front bracket (5) is rotatably connected to a support rod (6) that can support the seat. The rear end of the support rod (6) is movably connected to the rear support (11) or the rear bracket (1) so that when the front bracket (5) slides down relative to the connecting seat (2), it can drive the rear bracket (1) to move closer to the front bracket (5). Furthermore, a drive assembly (7) is provided between the push rod assembly (4) and the front bracket (5) so that when the push rod assembly (4) rotates relative to the rear support (11) and moves closer to the front bracket (5), it can drive the front bracket (5) to slide down relative to the connecting seat (2).

2. The stroller frame according to claim 1, characterized in that: The rear end of the support rod (6) is rotatably connected to the rear support (11) and offset from the rotation axis of the rear support (11) and the connecting seat (2).

3. The stroller frame according to claim 1, characterized in that: The lower end of the push rod assembly (4) is fixed with a connecting rod (8) that passes through the rear support (11) and the connecting seat (2).

4. The stroller frame according to claim 3, characterized in that: The drive assembly (7) includes a gear (71) fixed on the connecting rod (8) and located in the connecting seat (2), and the upper end of the front bracket (5) is provided with a rack (72) that meshes with the gear (71).

5. The stroller frame according to claim 4, characterized in that: The connecting seat (2) is provided with a transverse guide shaft (21), and the upper end of the front bracket (5) is provided with a guide groove (52) for the guide shaft (21) to pass through.

6. The stroller frame according to claim 3, characterized in that: The rear support (1) has two members, and the corresponding two rear supports (11) are located on the outside of the connecting seat (2). The push rod assembly (4) includes two push rods (41), and the upper ends of the two push rods (41) are provided with crossbars (42) connecting the two. The lower ends of the push rods (41) are fixedly connected to the push rod seats (3), and the corresponding two push rod seats (3) are located on the outside of the rear support (11). The two ends of the connecting rod (8) are fixedly connected to the push rods (41). The front support (5) is one member and... Its upper end is slidably connected to the connecting seat (2). The lower end of the front bracket (5) is provided with a horizontal cross bracket (53). The two ends of the cross bracket (53) are respectively provided with the front wheel (51). There are two support rods (6). The support rod (6) is rotatably connected to the front bracket (5) near its rear end position. The rear end of the support rod (6) is rotatably connected to the rear support (11) and deviates from the rotation axis of the rear support (11) and the connecting seat (2).

7. The stroller frame according to claim 6, characterized in that: The rear support (11) has a recessed groove (13) on its outer circumferential surface. The rear end of the support rod (6) extends into the recessed groove (13) and is rotatably connected to the rear support (11). When the stroller frame is unfolded, the outer wall of the support rod (6) abuts against the groove wall of the recessed groove (13).

8. The stroller frame according to claim 6, characterized in that: The push rod (41) includes a lower rod (411) fixedly connected to the push rod seat (3) and an upper rod (412) that can slide and extend relative to the lower rod (411). The crossbar (42) is connected to the upper end of the upper rod (412). The locking device includes a first locking structure (91) between the rear support (11) and the push rod seat (3) and a second locking structure (92) between the upper rod (412) and the lower rod (411). The first locking structure (91) includes a slot (911) transversely provided on the rear support (11). The push rod seat (3) is provided with a locking member (912) that can slide laterally within it and engage or disengage with the slot (911). The lower rod (411) is provided with a fixed seat (413). The fixed base (413) is provided with a sliding block (913) that can slide when the upper rod (412) slides down by being struck by the lower end of the upper rod (412). The fixed base (413) is also connected with a roller (414). A first pull rope (914) is provided between the sliding block (913) and the locking member (912) and passes around the roller (414) and can pull the locking member (912) to disengage from the slot (911) when the sliding block (913) slides down. A first return spring (915) is provided between the fixed base (413) and the sliding block (913) that can push the sliding block (913) to reset. A second return spring (916) is provided between the push rod seat (3) and the locking member (912) that can push the locking member (912) to reset.

9. The stroller frame according to claim 8, characterized in that: The second locking structure (92) includes a locking hole (921) on the lower rod (411), a locking seat (415) fixedly provided in the upper rod (412), a locking pin (922) provided in the locking seat (415) that can move laterally and engage or disengage from the locking hole (921), a driving rod (923) provided in the locking seat (415) that can move up and down along the upper rod (412) and can drive the locking pin (922) to disengage from the locking hole (921) when moving upward, and an unlocking block (924) provided in the middle of the crossbar (42). A second pull rope (925) is provided between the drive rod (923) and the unlocking block (924) to pull the drive rod (923) upward when the unlocking block (924) is operated and moved. A third return spring (926) is provided inside the upper rod (412) to push the drive rod (923) to reset when the unlocking block (924) is released. A fourth return spring (927) is provided between the locking seat (415) and the locking pin (922) to push the locking pin (922) to reset. A fifth return spring (928) is provided between the crossbar (42) and the unlocking block (924) to push the unlocking block (924) to reset.

10. The stroller frame according to claim 9, characterized in that: The crossbar (42) is also connected to a button (930) that can be pressed. The front end of the button (930) is provided with a blocking part (931). The unlocking block (924) is provided with a blocking surface (929) that can abut against the blocking part (931) to prevent the unlocking block (924) from moving. The unlocking block (924) is also provided with a relief groove (920). When the button (930) is pressed, the blocking part (931) disengages from the blocking surface (929) and the relief groove (920) is opposite to the button (930), so that the unlocking block (924) can be operated and moved. The crossbar (42) is provided with a sixth return spring (932) that can push the button (930) to reset.

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