A child's pushchair chassis

Abstract

This utility model discloses a stroller frame, including a left side frame and a right side frame, with a transverse connecting frame between the left and right sides. The left side frame includes a left front leg and a first left joint seat. A left rear leg is rotatably connected to the first left joint seat, and a left push rod assembly is rotatably connected to the first left joint seat. A left sliding member is slidably connected to the left front leg, and a left transmission rod rotatably connected to both the left sliding member and the left push rod assembly is provided. A left linkage rod rotatably connected to both the left sliding member and the left rear leg is provided. The right side frame includes a right front leg and a first right joint seat. A right rear leg is rotatably connected to the first right joint seat, and a right push rod assembly is rotatably connected to the first right joint seat. A right sliding member is slidably connected to the right front leg, and a right transmission rod rotatably connected to both the right sliding member and the right push rod assembly is provided. A right linkage rod rotatably connected to both the right sliding member and the right rear leg is provided. This utility model is flexible to fold and has a small folded size.

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 children's stroller frame that is simple in structure, flexible in folding, and small in size after folding.

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

[0005] A stroller frame, capable of moving from an unfolded state to a folded state after the locking mechanism is unlocked, includes a left side frame and a right side frame. A transverse connecting frame is provided between the left and right side frames. The left side frame includes a left front leg and a first left joint seat located at the upper end of the left front leg. A left front wheel is located at the lower end of the left front leg. A left rear leg is rotatably connected to the first left joint seat. A left rear wheel is located at the lower end of the left rear leg. A left push rod assembly is rotatably connected to the first left joint seat. A left sliding member is slidably connected to the left front leg. A left transmission rod is rotatably connected to the left sliding member and the left push rod assembly, and can push the left sliding member downward when the left push rod assembly rotates and folds relative to the left front leg. A left transmission rod is rotatably connected to the left sliding member and the left rear leg. A left linkage rod is connected to the left sliding member and can pull the left hind leg toward the left front leg when the left sliding member slides downward; the right side frame includes a right front leg and a first right joint seat located at the upper end of the right front leg, a right front wheel located at the lower end of the right front leg, a right hind leg rotatably connected to the first right joint seat, a right rear wheel located at the lower end of the right hind leg, a right push rod assembly rotatably connected to the first right joint seat, a right sliding member slidably connected to the right front leg, a right transmission rod rotatably connected to the right sliding member and the right push rod assembly and capable of pushing the right sliding member downward when the right push rod assembly rotates and folds relative to the right front leg, and a right linkage rod rotatably connected to the right sliding member and the right hind leg and capable of pulling the right hind leg toward the right front leg when the right sliding member slides downward.

[0006] The left push rod assembly includes a lower left push rod, the lower end of which is provided with a second left joint seat rotatably connected to a first left joint seat, and the upper end of which is slidably or rotatably connected to an upper left push rod, and the upper end of which is provided with a left handle; the right push rod assembly includes a lower right push rod, the lower end of which is provided with a second right joint seat rotatably connected to a first right joint seat, and the upper end of which is slidably or rotatably connected to an upper right push rod, and the upper end of which is provided with a right handle.

[0007] The stroller frame described above also includes a seat frame, which includes a left side and a right side. A left front connecting rod is provided between the front side of the left side and the first left joint seat or the left front leg, and the rear side of the left side has a protruding left connecting part, which is rotatably connected to the left push rod assembly. A right front connecting rod is provided between the front side of the right side and the first right joint seat or the right front leg, and the rear side of the right side has a protruding right connecting part, which is rotatably connected to the right push rod assembly.

[0008] The first left joint seat is provided with a left support part that abuts against the rear side of the left front link and supports the left front link when the stroller frame is in the unfolded state; the first right joint seat is provided with a right support part that abuts against the rear side of the right front link and supports the right front link when the stroller frame is in the unfolded state.

[0009] The lateral connecting frame includes a lower left connecting rod and a lower right connecting rod located at the lower ends of the left and right front legs, respectively. A left lateral extension is fixedly provided at the lower end of the left front leg, and a right lateral extension is fixedly provided at the lower end of the right front leg. The lower left connecting rod is rotatably connected to the left lateral extension, and the lower right connecting rod is rotatably connected to the right lateral extension. The lower left connecting rod and the lower right connecting rod are rotatably connected to each other. The lateral connecting frame also includes an upper left connecting rod and an upper right connecting rod located between the upper left push rod and the upper right push rod. The upper left connecting rod is rotatably connected to the upper end of the upper left push rod, and the upper right connecting rod is rotatably connected to the upper end of the upper right push rod. The upper left connecting rod and the upper right connecting rod are rotatably connected to each other. A folding traction mechanism is also provided between the left and right frames to allow them to move closer together in the lateral direction.

[0010] The folding traction mechanism includes a front crossing assembly and a rear crossing assembly. The front crossing assembly includes a first left connector rotatably connected to a first left joint seat, a first right connector rotatably connected to a first right joint seat, a second left connector rotatably connected to a left sliding member, and a second right connector rotatably connected to a right sliding member. The front crossing assembly also includes a first connecting rod and a second connecting rod that cross and rotatably connect to each other. The upper end of the first connecting rod is rotatably connected to the first left connector and the lower end is rotatably connected to the second right connector. The upper end of the second connecting rod is rotatably connected to the first right connector and the lower end is rotatably connected to the second left connector. The connection includes a first left connecting seat and a second left connecting seat fixedly arranged along the front-back direction on the left linkage rod, and a first right connecting seat and a second right connecting seat fixedly arranged along the front-back direction on the right linkage rod. The rear cross assembly includes a third connecting rod and a fourth connecting rod that cross each other and are rotatably connected. The front end of the third connecting rod is rotatably connected to the first left connecting seat, and a fifth connecting rod that is rotatably connected to both the rear end of the third connecting rod and the second right connecting seat is provided between the rear end of the third connecting rod and the second right connecting seat. The front end of the fourth connecting rod is rotatably connected to the first right connecting seat, and a sixth connecting rod that is rotatably connected to both the rear end of the fourth connecting rod and the second left connecting seat is provided between the rear end of the fourth connecting rod and the second left connecting seat.

[0011] The locking mechanism includes a first right locking device disposed between the first right joint seat and the second right joint seat, a second right locking device disposed between the right sliding member and the right front leg, and a third right locking device disposed between the right lateral extension and the right lower connecting rod. A first right linkage member is provided between the second right joint seat and the first right joint seat, which can unlock the second right locking device when the right push rod assembly rotates and folds relative to the first right joint seat. A second right linkage member is provided between the second right locking device and the third right locking device, which can unlock the third right locking device when the second right locking device is unlocked.

[0012] The first right linkage includes a rotating rod rotatably connected to the first right joint seat. One end of the rotating rod abuts against the abutting surface on the second right joint seat. The other end of the rotating rod is provided with a first pull rope between it and the second right locking device, which can pull the second right locking device to unlock when the second right joint seat pushes the rotating rod to rotate. The first right joint seat or the right front leg is provided with a third return spring sleeved on the first pull rope and capable of driving the rotating rod to rotate and return to its original position.

[0013] The second right locking device includes a locking hole on the right sliding member, which is sleeved on the right front leg. The right front leg has a sliding seat that can be pulled by the first pull rope when the rotating rod is pushed and rotated by the second right joint seat. The sliding seat is connected to a locking block that can engage or disengage with the locking hole. The locking block and the sliding seat are engaged by an inclined surface so that when the sliding seat is pulled by the first pull rope, the locking block can disengage from the locking hole. One end of the third return spring abuts against the sliding seat, and the other end abuts against the right front leg or the first right joint seat. A fourth return spring that can push the locking block to return to its original position is also provided between the locking block and the right front leg.

[0014] The third right locking device includes a locking groove on the lower right connecting rod. The right lateral extension has a locking block that can move laterally and engage or disengage from the locking groove. The second right linkage is a second pull rope. One end of the second pull rope is connected to the locking block, and the other end is connected to the sliding seat. When the sliding seat is pulled by the first pull rope, the sliding seat pulls the locking block away from the locking groove through the second pull rope. The right lateral extension also has a fifth return spring that can push the locking block to reset.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. In this invention, during folding, the left push rod assembly rotates forward relative to the first left joint seat and the right push rod assembly rotates forward relative to the first right joint seat. Therefore, the left transmission rod pushes the left sliding member downwards along the left front leg, and the right transmission rod pushes the right sliding member downwards along the right front leg. During this process, the left sliding member pulls the left rear leg forward to rotate and fold via the left linkage rod, and the right sliding member pulls the right rear leg forward to rotate and fold via the right linkage rod. The entire folding process is very convenient and quick; simply rotate the left and right push rod assemblies forward. It folds flexibly, has a small size when folded, and is easy to carry or store.

[0017] 2. When the left push rod assembly and the right push rod assembly of this utility model rotate forward and fold, they can also drive the left connecting part and the left front connecting rod to rotate and fold, as well as the right connecting part and the right front connecting rod to rotate and fold, thereby realizing the seat frame to fold along with it, making the stroller frame easy and smooth to fold.

[0018] 3. During the process of the left push rod assembly and the left rear leg rotating and approaching the left front leg, and the right push rod assembly and the right rear leg rotating and approaching the right front leg, the lateral folding traction mechanism can simultaneously bring the left and right frames closer to each other, thereby reducing the volume of the stroller frame in the left and right lateral directions, ensuring that the volume after folding is further reduced, making it easier to carry or store. Attached Figure Description

[0019] Figure 1This is one of the perspective views of Embodiment 1 of this utility model;

[0020] Figure 2 This is a second perspective view of Embodiment 1 of this utility model;

[0021] Figure 3 This is a side view of the present invention;

[0022] Figure 4 This is one of the perspective views of Embodiment 2 of this utility model;

[0023] Figure 5 This is the second perspective view of Embodiment 2 of this utility model;

[0024] Figure 6 This is one of the perspective views of the components in Embodiment 2 of this utility model;

[0025] Figure 7 This is a perspective view of the folding process in Embodiment 2 of this utility model;

[0026] Figure 8 This is a side view of the present invention during the folding process;

[0027] Figure 9 This is a perspective view of the folded state of Embodiment 2 of this utility model;

[0028] Figure 10 This is one of the exploded views of the components of this utility model;

[0029] Figure 11 This is the second exploded view of a component of this utility model;

[0030] Figure 12 This is a cross-sectional view of a component of this utility model;

[0031] Figure 13 This is the third exploded view of the component of this utility model. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings:

[0033] Example 1:

[0034] like Figure 1 , Figure 2 , Figure 3 as well as Figure 8As shown, a stroller frame can move from an unfolded state to a folded state after the locking mechanism is unlocked. It includes a left side frame 1 and a right side frame 2, with a transverse connecting frame 3 between the left side frame 1 and the right side frame 2. The left side frame 1 includes a left front leg 11 and a first left joint seat 12 located on the upper end of the left front leg 11. A left front wheel 13 is located at the lower end of the left front leg 11. A left rear leg 14 is rotatably connected to the first left joint seat 12, and a left rear wheel 15 is located at the lower end of the left rear leg 14. A left push rod assembly 16 is rotatably connected to the first left joint seat 12. A left sliding member 17 is slidably connected to the left front leg 11. A left transmission rod 18 is rotatably connected to the left sliding member 17 and the left push rod assembly 16, and can push the left sliding member 17 downward when the left push rod assembly 16 rotates and folds relative to the left front leg 11. A left transmission rod 18 is rotatably connected to the left sliding member 17 and the left rear leg 14, and can push the left sliding member 17 downward when the left push rod assembly 16 rotates and folds relative to the left front leg 11. When the left sliding member 17 slides downward, it can pull the left rear leg 14 towards the left front leg 11. The right side frame 2 includes a right front leg 21 and a first right joint seat 22 located on the upper end of the right front leg 21. The lower end of the right front leg 21 is provided with a right front wheel 23. The first right joint seat 22 is rotatably connected to a right rear leg 24. The lower end of the right rear leg 24 is provided with a right rear wheel 25. The first right joint seat 22 is rotatably connected to a right push rod assembly 26. The right front leg 21 is slidably connected to a right sliding member 27. A right transmission rod 28 is provided between the right sliding member 27 and the right push rod assembly 26, which is rotatably connected to both and can push the right sliding member 27 downward when the right push rod assembly 26 rotates and folds relative to the right front leg 21. A right linkage rod 29 is provided between the right sliding member 27 and the right rear leg 24, which is rotatably connected to both and can pull the right rear leg 24 towards the right front leg 21 when the right sliding member 27 slides downward. During folding, the left push rod assembly 16 rotates forward relative to the first left joint seat 12 and folds, while the right push rod assembly 26 rotates forward relative to the first right joint seat 22. Therefore, the upper end of the left transmission rod 18 rotates relative to the left push rod assembly 16 and is pushed, which in turn pushes the left slider 17 to slide downward along the left front leg 11. At the same time, the upper end of the right transmission rod 28 rotates relative to the right push rod assembly 26 and is pushed, which in turn pushes the right slider 27 to slide downward along the right front leg 21. During this process, the left slider 17 pulls the left rear leg 14 forward and folds it onto the left front leg 11 via the left linkage rod 19, and the right slider 27 pulls the right rear leg 24 forward and folds it onto the right front leg 21 via the right linkage rod 29. Ultimately, the left push rod assembly 16 and the left rear leg 14 are brought together to the left front leg 11, and the right push rod assembly 26 and the right rear leg 24 are brought together to the right front leg 21. The entire folding process is very convenient and quick. You only need to rotate the left push rod assembly 16 and the right push rod assembly 26 forward. The folding is flexible and the folded size is small, making it easy to carry or store.In this embodiment, the locking mechanism can adopt the traditional locking structure of a locking hole and a locking pin in the prior art. For example, a locking hole and a locking pin can be provided between the first left joint seat 12 and the left push rod assembly, which will not be described in detail here.

[0035] like Figure 1 and Figure 2 As shown, the left push rod assembly 16 includes a lower left push rod 161, the lower end of which is provided with a second left joint seat 162 rotatably connected to the first left joint seat 12. The upper end of the lower left push rod 161 is slidably connected to an upper left push rod 163, and the upper end of the upper left push rod 163 is provided with a left handle 164. The right push rod assembly 26 includes a lower right push rod 261, the lower end of which is provided with a second right joint seat 262 rotatably connected to the first right joint seat 22. The upper end of the lower right push rod 261 is slidably connected to an upper right push rod 263, and the upper right push rod 263 is provided with a right handle 264. Alternatively, the upper left push rod 163 can be rotatably connected to the lower left push rod 161, and the upper right push rod 263 can also be rotatably connected to the lower right push rod 261. In this embodiment, when folding the stroller frame, the upper left push rod 163 is first slid and retracted into the lower left push rod 161, and the upper right push rod 263 is slid and retracted into the lower right push rod 261. The locking components between the upper left push rod 163 and the lower left push rod 161, as well as between the upper right push rod 263 and the lower right push rod 261, can be conventional locking components. After the locking components are unlocked, the upper left push rod 163 can slide into the lower left push rod 161, and the upper right push rod 263 can slide into the lower right push rod 261.

[0036] like Figure 1 and Figure 2As shown, the stroller frame also includes a seat frame, which includes a left side portion 41 and a right side portion 42. The left side portion 41 and the right side portion 42 may adopt a rod-like structure to support the seat. A left front connecting rod 43 is provided between the front side of the left side portion 41 and the first left joint seat 12, and is rotatably connected to both. Of course, the left front connecting rod 43 can also be provided between the first left joint seat 12 and the left front leg 11. A protruding left connecting part 44 is provided on the rear side of the left side portion 41. The left connecting part 44 is rotatably connected to the left push rod assembly 16. In this embodiment, the left connecting part 44 is an L-shaped iron plate fixed on the left side portion 41. A right front connecting rod 45 is provided between the front side of the right side portion 42 and the first right joint seat 22, and is rotatably connected to both. Of course, the right front connecting rod 45 can also be provided between the first right joint seat 22 and the right front leg 21. A protruding right connecting part 46 is provided on the rear side of the right side portion 42. The right connecting part 46 is rotatably connected to the right push rod assembly 26. In this embodiment, the right connecting part 46 is an L-shaped iron plate fixed on the right side portion 42. When the stroller frame is folded, the left push rod assembly 16 rotates forward, pushing the upper end of the left connecting part 44 and causing the left side part 41 to move. The left side part 41 then pushes the left front connecting rod 43, causing the left front connecting rod 43 to rotate until the left side part 41 and the left front connecting rod 43 also come closer to the left front leg 11. Similarly, the right push rod assembly 26 rotates forward, causing the right side part 42 and the right front connecting rod 45 to come closer to the right front leg 21, thereby realizing the folding of the seat frame and making the stroller frame folding convenient and smooth.

[0037] like Figure 1 and Figure 2 As shown, the first left joint seat 12 is provided with a left support part 10 that abuts against the rear side of the left front connecting rod 43 to support the left front connecting rod 43 when the stroller frame is in the unfolded state; the first right joint seat 22 is provided with a right support part 20 that abuts against the rear side of the right front connecting rod 45 to support the right front connecting rod 45 when the stroller frame is in the unfolded state. In this embodiment, both the left support part 10 and the right support part 20 are laterally protruding convex pillars. The convex pillars are provided with receiving grooves for the left front connecting rod 43 and the right front connecting rod 45 to enter. The bottom of the receiving groove abuts against the left front connecting rod 43 and the right front connecting rod 45, which can position the left front connecting rod 43 and the right front connecting rod 45 and prevent the left front connecting rod 43 and the right front connecting rod 45 from shaking, thereby making the entire stroller frame stable and reliable in the unfolded state.

[0038] A front handrail 8 is provided between the lower left push rod 161 and the lower right push rod 261 for children to grip. A canopy bracket 9 is provided on the left push rod assembly 16 and the right push rod assembly 26 for installing a sunshade.

[0039] Example 2:

[0040] like Figures 4 to 13As shown, the difference between Example 2 and Example 1 is that:

[0041] The lateral connecting frame 3 includes a lower left connecting rod 31 and a lower right connecting rod 32 located at the lower ends of the left front leg 11 and the right front leg 21, respectively. A left lateral extension 33 is fixedly provided at the lower end of the left front leg 11, and a right lateral extension 34 is fixedly provided at the lower end of the right front leg 21. The lower left connecting rod 31 is rotatably connected to the left lateral extension 33, and the lower right connecting rod 32 is rotatably connected to the right lateral extension 34. Furthermore, the lower left connecting rod 31 and the lower right connecting rod 32 are rotatably connected to each other. Next, the transverse connecting frame 3 also includes an upper left connecting rod 35 and an upper right connecting rod 36 located between the upper left push rod 163 and the upper right push rod 263. The upper left connecting rod 35 is rotatably connected to the upper end of the upper left push rod 163, and the upper right connecting rod 36 is rotatably connected to the upper end of the upper right push rod 263. The upper left connecting rod 35 and the upper right connecting rod 36 are rotatably connected to each other. A folding traction mechanism 5 is also provided between the left side frame 1 and the right side frame 2 to bring them closer together in the transverse direction. Therefore, during the process of the left push rod assembly 16 and the left rear leg 14 rotating and moving closer to the left front leg 11, and the right push rod assembly 26 and the right rear leg 24 rotating and moving closer to the right front leg 21, the folding traction mechanism 5 can simultaneously bring the left side frame 1 and the right side frame 2 closer together, thereby reducing the volume of the stroller frame in the left and right transverse direction, ensuring that the folded volume is further reduced, making it easier to carry or store. Specifically, when the folding traction mechanism 5 drives the left frame 1 and the right frame 2 to move closer together, the lower left link 31 and the lower right link 32 rotate relative to the left lateral extension 33 and the right lateral extension 34, and the lower left link 31 and the lower right link 32 rotate relative to each other and move closer together. At the same time, the upper left link 35 and the upper right link 36 rotate relative to the upper left push rod 163 and the upper right push rod 263, and the upper left link 35 and the upper right link 36 rotate relative to each other and move closer together.

[0042] like Figures 4 to 9As shown, the folding traction mechanism 5 includes a front crossing assembly 51 and a rear crossing assembly 52. ​​The front crossing assembly 51 includes a first left connecting head 511 rotatably connected to the first left joint seat 12, a first right connecting head 512 rotatably connected to the first right joint seat 22, a second left connecting head 513 rotatably connected to the left sliding member 17, and a second right connecting head 514 rotatably connected to the right sliding member 27. The front crossing assembly 51 also includes a first connecting rod 515 and a second connecting rod 516 that cross and rotatably connect to each other. The upper end of the first connecting rod 515 is rotatably connected to the first left connecting head 511 and the lower end is rotatably connected to the second right connecting head 514. The upper end of the second connecting rod 516 is rotatably connected to the first right connecting head 512 and the lower end is rotatably connected to the second left connecting head 513. In this embodiment, the left linkage rod 19, the second left connecting head 513, and the left transmission rod 18 are coaxially and rotatably connected to the rear cross joint seat 12. On the left sliding member 17, the right linkage rod 29, the second right connecting head 514, and the right transmission rod 28 are coaxially and rotatably connected to the right sliding member 27. The left linkage rod 19 is fixedly provided with a first left connecting seat 191 and a second left connecting seat 192 along the front-back direction. The right linkage rod 29 is fixedly provided with a first right connecting seat 291 and a second right connecting seat 292 along the front-back direction. The rear cross assembly 52 includes a third connecting rod 523 and a fourth connecting rod 524 that cross each other and are rotatably connected. The front end of the third connecting rod 523 is rotatably connected to the first left connecting seat 191. The rear end of the third connecting rod 523 is provided with a fifth connecting rod 525 that is rotatably connected to the second right connecting seat 292. The front end of the fourth connecting rod 524 is rotatably connected to the first right connecting seat 291. The rear end of the fourth connecting rod 524 is provided with a sixth connecting rod 526 that is rotatably connected to the second left connecting seat 192.When the left push rod assembly 16 and the right push rod assembly 26 rotate forward and fold, the left slide member 17 and the right slide member 27 slide downward. The left slide member 17 pulls the second connecting rod 516 downward, and the right slide member 27 pulls the first connecting rod 515 downward, thereby causing the originally open second connecting rod 516 and the first connecting rod 515 to close together. During this process, the left slide member 17 pulls the left linkage rod 19, causing the third connecting rod 523 to rotate relative to the left linkage rod 19, and the right slide member 27 pulls the right linkage rod 29, causing the fourth connecting rod 524 to rotate relative to the right linkage rod 19. The moving rod 29 rotates, and the fifth connecting rod 525 and the sixth connecting rod 526 also rotate relative to each other, causing the originally open fifth connecting rod 525 and the sixth connecting rod 526 to retract. In addition, the upper left connecting rod 35 and the upper right connecting rod 36 fold, as well as the lower left connecting rod 31 and the lower right connecting rod 32 fold. Finally, during the process of the left push rod assembly 16 and the left rear leg 14 folding towards the left front leg 11 and the right push rod assembly 26 and the right rear leg 24 folding towards the right front leg 21, the stroller frame also folds in the lateral direction, further reducing the volume of the stroller frame after folding.

[0043] like Figures 10 to 13 As shown, the locking mechanism includes a first right locking device 61 disposed between the first right joint seat 22 and the second right joint seat 262, a second right locking device 62 disposed between the right sliding member 27 and the right front leg 21, and a third right locking device 63 disposed between the right lateral extension 34 and the right lower connecting rod 32. A first right linkage member 64 is provided between the second right joint seat 262 and the first right joint seat 22, which can drive the second right locking device 62 to unlock when the right push rod assembly 26 rotates and folds relative to the first right joint seat 22. A second right linkage member 65 is provided between the second right locking device 62 and the third right locking device 63, which can drive the third right locking device 63 to unlock when the second right locking device 62 is unlocked. After the first right locking device 61 is unlocked, the right push rod assembly 26 rotates and folds forward relative to the first right joint seat 22. During the rotation, the second right locking device 62 is unlocked through the first right linkage 64, and the right sliding member 27 can slide downward on the right front leg 21. When the second right locking device 62 is unlocked, the third right locking device 63 is unlocked through the second right linkage 65, so that the lower right connecting rod 32 and the right lateral extension 34 are unlocked. Therefore, as long as the right push rod assembly 26 rotates and folds forward, the second right locking device 62 and the third right locking device 63 can be unlocked, making the unlocking operation of the stroller frame very convenient and quick.

[0044] like Figures 10 to 12As shown, the first right locking device 61 includes a first slot 611 arranged circumferentially on the first right joint seat 22 and a second slot 612 arranged circumferentially on the second right joint seat 262. A locking block 613 is provided between the second right joint seat 262 and the first right joint seat 22, capable of simultaneously engaging with the first slot 611 and the second slot 612. A movable block 614 is provided between the locking block 613 and the second right joint seat 262, capable of pushing the locking block 613 away from the second slot 612 during rotation. A first return spring 615 is provided between the locking block 613 and the first right joint seat 22 to push the locking block 613 back to its original position. A sliding block 616 is provided inside the second right joint seat 262 to slide and push the movable block 614 to rotate. A second return spring 617 is provided between the sliding block 616 and the second right joint seat 262 to push the sliding block 616 back to its original position. The lower end of the upper right push rod 263 is provided with a pushing part (not shown in the figure) that pushes the sliding block 616 to slide when it slides into the lower right push rod 261. When the stroller frame needs to be folded, the upper right push rod 263 is slid down. The pushing part at the lower end of the upper right push rod 263 pushes the sliding block 616, which in turn pushes the movable block 614 to rotate. During the rotation of the movable block 614, the locking block 613 is disengaged from the second slot 612, at which point the right push rod assembly 26 can be rotated forward and folded. Multiple inclined grooves can be provided on the movable block 614 along the circumferential direction, and inclined protrusions that cooperate with the inclined grooves are provided on the second right joint seat 262. Therefore, when the movable block 614 rotates, the inclined protrusions can push the movable block 614 to move laterally and push the locking block 613.

[0045] like Figures 10 to 13As shown, the first right linkage 64 includes a rotating rod 641 rotatably connected to the first right joint seat 22. One end of the rotating rod 641 abuts against the abutting surface 262a on the second right joint seat 262. The other end of the rotating rod 641 is provided with a first pull rope 642 between it and the second right locking device 62, which can pull the second right locking device 62 to unlock when the second right joint seat 262 pushes the rotating rod 641 to rotate. The first right joint seat 22 or the right front leg 21 is provided with a first pull rope 642 sleeved on the first pull rope. A third return spring 643 drives the rotating rod 641 to rotate and reset. The second right locking device 62 includes a locking hole (not shown in the figure) on the right sliding member 27. The right sliding member 27 is sleeved on the right front leg 21. The right front leg 21 has a sliding seat 622 that can be pulled by the first pull rope 642 when the rotating rod 641 is pushed and rotated by the second right joint seat 262. A locking block 623 that can engage or disengage with the locking hole is connected to the sliding seat 622. The sliding seat 622, through the inclined surface engagement, allows the sliding seat 622 to slide when pulled by the first pull rope 642, which can cause the locking block 623 to disengage from the locking hole. One end of the third return spring 643 abuts against the sliding seat 622, and the other end abuts against the right front leg 21 or the first right joint seat 22. A fourth return spring 624, capable of pushing the locking block 623 back to its original position, is also provided between the locking block 623 and the right front leg 21. The third right locking device 63 includes a locking groove 631 on the lower right connecting rod 32. The right lateral extension... The right lateral extension 34 is provided with a locking block 632 that can move laterally and engage or disengage from the locking groove 631. The second right linkage 65 is a second pull rope. One end of the second pull rope is connected to the locking block 632 and the other end is connected to the sliding seat 622. When the sliding seat 622 is pulled by the first pull rope 642, the sliding seat 622 pulls the locking block 632 to disengage from the locking groove 631 through the second pull rope. The right lateral extension 34 is also provided with a fifth return spring 633 that can push the locking block 632 to reset.After the first right locking device 61 is unlocked, the right push rod assembly 26 rotates forward and folds. During the rotation, the abutment surface 262a on the second right joint seat 262 pushes the rotating rod 641 to rotate. The rotating rod 641 then pulls the sliding seat 622 upward through the first pull rope 642. The third return spring 643 is compressed. When the sliding seat 622 slides upward, it pushes the locking block 623 to disengage from the locking hole on the right sliding member 27. At this time, the second right locking device 62 is unlocked. When the sliding seat 622 slides upward, it pulls the locking block 632 to disengage from the locking groove 631 through the second pull rope. At this time, the third right locking device 63 is also unlocked. Therefore, the second right locking device 62 and the third right locking device 63 can be unlocked in conjunction by simply rotating the right push rod assembly 26 forward. This allows the stroller frame to maintain high reliability when unfolded by locking multiple locking components, and also makes the stroller frame easy to operate when folding.

[0046] To ensure the stability of the stroller in the unfolded state, the locking mechanism further includes a first left locking device (not shown in the figure) located between the first left joint seat 12 and the second left joint seat 162, a second left locking device (not shown in the figure) located between the left sliding member 17 and the left front leg 11, and a third left locking device (not shown in the figure) located between the left lateral extension 33 and the left lower connecting rod 31. A first left linkage (not shown in the figure) is provided between the second left joint seat 162 and the first left joint seat 12, which can unlock the second left locking device when the left push rod assembly 16 rotates and folds relative to the first left joint seat 12. A second left linkage (not shown in the figure) is provided between the second left locking device and the third left locking device, which can unlock the third left locking device when the second left locking device is unlocked. In this embodiment, the first left locking device and the first right locking device 61, the second left locking device and the second right locking device 62, the third left locking device and the third right locking device 63, the first left linkage member and the first right linkage member 64, and the second left linkage member and the second right linkage member 65 all adopt the same structure. The first left locking device, the second left locking device, the third left locking device, the first left linkage member, and the second left linkage member will not be described in detail here.

[0047] like Figure 7 As shown, to further stabilize the stroller in the unfolded state, a locking structure 7 is provided between the upper left connecting rod 35 and the upper right connecting rod 36. When folding is required, the locking structure 7 is unlocked, causing the upper left connecting rod 35 and the upper right connecting rod 36 to rotate slightly relative to each other. Then, the upper left push rod 163 is retracted inward to the lower left push rod 161, and the upper right push rod 263 is retracted inward to the lower right push rod 261. The locking structure 7 can be a press-type locking structure as used in the prior art, which will not be described in detail here.

[0048] like Figure 5As shown, a deformable and foldable front armrest 8 is provided between the lower left push rod 161 and the lower right push rod 261 for children to grip. Deformable and foldable canopy supports 9 are provided on the left push rod assembly 16 and the right push rod assembly 26 to support the canopy. Both the front armrest 8 and the canopy support 9 are elastically deformable, allowing the stroller frame to fold smoothly without breaking.

[0049] 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 child's pushchair frame which is movable from an unfolded condition to a folded condition after unlocking of a locking mechanism, characterised in that: The system includes a left side frame (1) and a right side frame (2), with a transverse connecting frame (3) between the left side frame (1) and the right side frame (2). The left side frame (1) includes a left front leg (11) and a first left joint seat (12) located on the upper end of the left front leg (11). A left front wheel (13) is located at the lower end of the left front leg (11). A left rear leg (14) is rotatably connected to the first left joint seat (12). A left rear wheel (15) is located at the lower end of the left rear leg (14). A left rear wheel (15) is rotatably connected to the first left joint seat (12). A left push rod assembly (16) is rotatably connected to the left front leg (11), and a left sliding member (17) is slidably connected to the left front leg (11). A left transmission rod (18) is provided between the left sliding member (17) and the left push rod assembly (16), which is rotatably connected to both and can push the left sliding member (17) downward when the left push rod assembly (16) rotates and folds relative to the left front leg (11). A left transmission rod (18) is provided between the left sliding member (17) and the left rear leg (14), which is rotatably connected to both and can pull the left rear leg when the left sliding member (17) slides downward. 14) A left linkage rod (19) that moves toward the left front leg (11); the right side frame (2) includes a right front leg (21) and a first right joint seat (22) located on the upper end of the right front leg (21). The lower end of the right front leg (21) is provided with a right front wheel (23). The first right joint seat (22) is rotatably connected to a right rear leg (24). The lower end of the right rear leg (24) is provided with a right rear wheel (25). The first right joint seat (22) is rotatably connected to a right push rod assembly (26). The right front leg (21) is rotatably connected to the left front leg (11). 1) A right sliding member (27) is slidably connected to the upper part. A right transmission rod (28) is provided between the right sliding member (27) and the right push rod assembly (26) and is rotatably connected to both of them. When the right push rod assembly (26) is folded relative to the right front leg (21), it can push the right sliding member (27) to slide downward. A right linkage rod (29) is provided between the right sliding member (27) and the right rear leg (24) and is rotatably connected to both of them. When the right sliding member (27) slides downward, it can pull the right rear leg (24) to move closer to the right front leg (21).

2. The child's carriage frame of claim 1, wherein: The left push rod assembly (16) includes a lower left push rod (161), the lower end of which is provided with a second left joint seat (162) rotatably connected to the first left joint seat (12), the upper end of which is slidably or rotatably connected to an upper left push rod (163), and the upper end of which is provided with a left handle (164); the right push rod assembly (26) includes a lower right push rod (261), the lower end of which is provided with a second right joint seat (262) rotatably connected to the first right joint seat (22), the upper end of which is slidably or rotatably connected to an upper right push rod (263), and the upper end of which is provided with a right handle (264).

3. The stroller frame according to claim 2, characterized in that: It also includes a seat frame, which includes a left side part (41) and a right side part (42). The left side part (41) is provided with a left front connecting rod (43) rotatably connected to the first left joint seat (12) or the left front leg (11) on the front side. The left side part (41) is provided with a protruding left connecting part (44) on the rear side. The left connecting part (44) is rotatably connected to the left push rod assembly (16). The right side part (42) is provided with a right front connecting rod (45) rotatably connected to the first right joint seat (22) or the right front leg (21) on the front side. The right side part (42) is provided with a protruding right connecting part (46) on the rear side. The right connecting part (46) is rotatably connected to the right push rod assembly (26).

4. The child's carriage frame of claim 3, wherein: The first left joint seat (12) is provided with a left support part (10) that abuts against the rear side of the left front link (43) and supports the left front link (43) when the stroller frame is in the unfolded state; the first right joint seat (22) is provided with a right support part (20) that abuts against the rear side of the right front link (45) and supports the right front link (45) when the stroller frame is in the unfolded state.

5. A child's pushchair frame according to any one of claims 2 to 4, wherein: The lateral connecting frame (3) includes a lower left connecting rod (31) and a lower right connecting rod (32) located at the lower ends of the left front leg (11) and the right front leg (21), respectively. A left lateral extension (33) is fixedly provided at the lower end of the left front leg (11), and a right lateral extension (34) is fixedly provided at the lower end of the right front leg (21). The lower left connecting rod (31) is rotatably connected to the left lateral extension (33), and the lower right connecting rod (32) is rotatably connected to the right lateral extension (34). The lower left connecting rod (31) and the lower right connecting rod (32) are rotatable relative to each other. The transverse connecting frame (3) further includes an upper left connecting rod (35) and an upper right connecting rod (36) located between the upper left push rod (163) and the upper right push rod (263). The upper left connecting rod (35) is rotatably connected to the upper end of the upper left push rod (163), and the upper right connecting rod (36) is rotatably connected to the upper end of the upper right push rod (263). The upper left connecting rod (35) and the upper right connecting rod (36) are rotatably connected to each other. A folding traction mechanism (5) is also provided between the left side frame (1) and the right side frame (2) to bring them closer together in the transverse direction.

6. The stroller frame of claim 5, wherein: The folding traction mechanism (5) includes a front cross assembly (51) and a rear cross assembly (52). The front cross assembly (51) includes a first left connector (511) rotatably connected to the first left joint seat (12), a first right connector (512) rotatably connected to the first right joint seat (22), a second left connector (513) rotatably connected to the left slide member (17), and a second right connector (514) rotatably connected to the right slide member (27). The front cross assembly (51) also includes a first connecting rod (515) and a second connecting rod (516) that cross each other and are rotatably connected. The upper end of the first connecting rod (515) is rotatably connected to the first left connector (511) and the lower end is rotatably connected to the second right connector (514). The upper end of the second connecting rod (516) is rotatably connected to the first right connector (512) and the lower end is connected to the second left connector (513). Rotary connection; the left linkage rod (19) is fixedly provided with a first left connecting seat (191) and a second left connecting seat (192) along the front-back direction, the right linkage rod (29) is fixedly provided with a first right connecting seat (291) and a second right connecting seat (292) along the front-back direction, the rear cross assembly (52) includes a third connecting rod (523) and a fourth connecting rod (524) that cross each other and are rotatably connected, the front end of the third connecting rod (523) is rotatably connected to the first left connecting seat (191), the rear end of the third connecting rod (523) is provided with a fifth connecting rod (525) that is rotatably connected to the second right connecting seat (292) between the rear end of the third connecting rod (523) and the second right connecting seat (292), the front end of the fourth connecting rod (524) is rotatably connected to the first right connecting seat (291), and the rear end of the fourth connecting rod (524) is provided with a sixth connecting rod (526) that is rotatably connected to the second left connecting seat (192) between the rear end of the fourth connecting rod (524) and the second left connecting seat (192).

7. The stroller frame of claim 5, wherein: The locking mechanism includes a first right locking device (61) disposed between the first right joint seat (22) and the second right joint seat (262), a second right locking device (62) disposed between the right sliding member (27) and the right front leg (21), and a third right locking device (63) disposed between the right lateral extension (34) and the right lower connecting rod (32). A first right linkage member (64) is provided between the second right joint seat (262) and the first right joint seat (22) to unlock the second right locking device (62) when the right push rod assembly (26) rotates and folds relative to the first right joint seat (22). A second right linkage member (65) is provided between the second right locking device (62) and the third right locking device (63) to unlock the third right locking device (63) when the second right locking device (62) is unlocked.

8. The child's carriage frame of claim 7 wherein: The first right linkage (64) includes a rotating rod (641) rotatably connected to the first right joint seat (22). One end of the rotating rod (641) abuts against the abutting surface (262a) on the second right joint seat (262). The other end of the rotating rod (641) is provided with a first pull rope (642) between it and the second right locking device (62), which can pull the second right locking device (62) to unlock when the second right joint seat (262) pushes the rotating rod (641) to rotate. The first right joint seat (22) or the right front leg (21) is provided with a third return spring (643) sleeved on the first pull rope (642) and capable of driving the rotating rod (641) to rotate and reset.

9. The stroller frame of claim 8, wherein: The second right locking device (62) includes a locking hole on the right sliding member (27), the right sliding member (27) is sleeved on the right front leg (21), and the right front leg (21) is provided with a sliding seat (622) that can be pulled by the first pull rope (642) when the rotating rod (641) is pushed and rotated by the second right joint seat (262). The sliding seat (622) is connected with a locking block (623) that can engage or disengage with the locking hole, and the locking block (623) and the sliding seat (622) are engaged by an inclined plane so that when the sliding seat (622) is pulled by the first pull rope (642) and slides, the locking block (623) can be disengaged from the locking hole. One end of the third return spring (643) abuts against the sliding seat (622) and the other end abuts against the right front leg (21) or the first right joint seat (22). A fourth return spring (624) that can push the locking block (623) to return to its original position is also provided between the locking block (623) and the right front leg (21).

10. The stroller frame of claim 9, wherein: The third right locking device (63) includes a locking groove (631) on the lower right connecting rod (32). The right lateral extension (34) is provided with a locking block (632) that can move laterally and engage or disengage from the locking groove (631). The second right linkage (65) is a second pull rope. One end of the second pull rope is connected to the locking block (632), and the other end is connected to the sliding seat (622). When the sliding seat (622) is pulled by the first pull rope (642) and slides, the sliding seat (622) pulls the locking block (632) away from the locking groove (631) through the second pull rope. The right lateral extension (34) is also provided with a fifth return spring (633) that can push the locking block (632) to reset.

Images