A foldable baby stroller

Abstract

The present invention discloses a foldable stroller, and provides a foldable stroller with a simple folding method, convenient folding, small volume after folding, stable and reliable structure, and high safety. The present invention comprises a foldable stroller frame and a seat connected thereto, wherein the seat comprises a seat surface, a backrest is arranged above the seat surface, and the lower end of the backrest is connected to the rear of the seat surface through a folding joint; the seat also comprises a base, and the seat surface is rotatably connected to the base; a push rod of the stroller frame, a support rod arranged in an X shape with the push rod, and a bottom frame, a sliding lock for limiting the top end of the support rod from sliding forward is arranged between the top end of the support rod and the lower part of the seat, and when the foldable stroller is in an unfolded state, the sliding lock locks the seat, the push rod, the support rod, and the bottom frame while locking the top end of the push rod. The present invention is a baby stroller tool that is convenient to fold and carry.

Description

[Technical field]

[0001] The present invention relates to the technical field of strollers, and in particular to a foldable stroller for children. [Background technology]

[0002] In order to facilitate the transportation, storage and carrying of child strollers, most child strollers are foldable structures. The folding structures of foldable child strollers currently on the market are mostly single structures such as telescopic, sliding, and rotating, which have the following problems: 1. Due to the limitations of the folding structure, both hands are often required to perform the folding operation when folding; 2. Due to the unreasonable folding structure, high friction at the matching position, and fragile structure, folding is more laborious, difficult to fold and easy to damage; 3. Since the folding structure has no folding lock, it is easy to cause safety problems; 4. The backrest is inconvenient and difficult to fold; 5. The folding structure is imperfect, the volume is still relatively large after folding, which takes up space and has poor portability; 6. Both hands are required to fold, and one hand cannot be operated, etc.

[0003] The present invention is made based on this situation. [Summary of the invention]

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a foldable child stroller which has the advantages of simple folding method, convenient folding, small volume after folding, firm and reliable structure and high safety.

[0005] The present invention is achieved through the following technical solutions:

[0006] A foldable baby stroller comprises a foldable stroller frame and a seat connected thereto, wherein the seat comprises a seat surface, a backrest is arranged above the seat surface, and the lower end of the backrest is connected to the rear of the seat surface through a folding joint.

[0007] A foldable stroller as described above, wherein the folding joint comprises a first rotating element fixed to the lower end of the backrest and a second rotating element fixed to the tail of the seat surface, a button is provided between the first rotating element and the second rotating element, a rotating shaft is provided between the first rotating element, the second rotating element and the button and they are hinged through the rotating shaft, and a joint locking device for locking the first rotating element and the second rotating element to each other is provided between the first rotating element, the second rotating element and the button.

[0008] A foldable stroller as described above, wherein the joint locking device comprises a first slide groove radially arranged on the end surface of the first rotating element, a second slide groove radially arranged on the end surface of the second rotating element, a third slide groove non-radially arranged on the end surface of the button, and one end of the third slide groove is close to the axis of the rotating shaft and the other end is far away from the axis of the rotating shaft, and the joint locking device also includes a pin that passes through the first slide groove, the second slide groove and the third slide groove in sequence; when the backrest is flipped up, the second slide groove overlaps with the first slide groove, and the pin shaft is simultaneously located in the first slide groove and the second slide groove, so that the first rotating element and the second rotating element cannot rotate relative to each other and the folding joint is locked;

[0009] The end surface of the first rotating element is also provided with an arc-shaped fourth slide groove arranged around the axis of the rotating shaft, and the end of the first slide groove close to the axis of the rotating shaft is connected with one end of the fourth slide groove; when the button is pressed, the button rotates around the rotating shaft, and at the same time, the third slide groove pushes the pin shaft to slide along the first slide groove and the second slide groove toward the axis of the rotating shaft. After the pin shaft slides to the end of the first slide groove and the second slide groove close to the axis of the rotating shaft, the pin shaft enters the fourth slide groove. At this time, the pin shaft is located in the second slide groove and the fourth slide groove at the same time, and the first rotating element and the second rotating element can rotate relative to each other, thereby unlocking the folding joint.

[0010] In the foldable stroller as described above, the button is provided with a first spring which enables the pin to slide along the third slide groove in a direction away from the axis of the rotating shaft. The first spring is sleeved on the rotating shaft and one end of the first spring is fixed on the button and the other end is clamped on the pin.

[0011] In the foldable baby stroller as described above, the seat also includes a base, and the seat surface is rotatably connected to the base.

[0012] In the foldable baby stroller as described above, the base is provided with a rotation locking device for locking the seat surface to restrict its rotation on the base.

[0013] A foldable baby stroller as described above, wherein the center of the upper end of the base is provided with a base shaft protruding upward, and the center of the lower end of the seat surface is provided with a shaft hole for the base shaft to be inserted and rotated therein; the upper end of the base is also provided with an annular groove, and the lower end of the seat surface is also provided with an annular boss protruding downward and capable of rotating in the annular groove;

[0014] The rotation locking device includes a fifth slide groove arranged on the base and connected with the annular groove, the fifth slide groove is arranged radially along the base, a locking block that can slide in the fifth slide groove is provided in the fifth slide groove, and a second spring that pulls the locking block toward the center of the base is also provided in the fifth slide groove. At least one notch that can be inserted into the locking block is provided on the annular boss, and when the locking block is pulled outward from the notch, the seat surface can rotate freely on the base.

[0015] A foldable stroller as described above, wherein the stroller frame includes a retractable push rod, a support rod for supporting a seat and arranged in an X shape with the push rod, and a bottom frame with wheels, wherein the tail of the seat is rotatably connected to the middle of the push rod, the lower end of the push rod is rotatably and slidably connected to the bottom frame, the lower end of the support rod is rotatably connected to the tail of the bottom frame, the upper end of the support rod is slidably and rotatably connected to the lower part of the seat, a support shaft is provided in the middle of the support rod, the support shaft is pressed against the push rod from top to bottom and is in detachable contact with the push rod; a sliding lock is provided between the top end of the support rod and the lower part of the seat to limit the top end of the support rod from sliding forward, and when the foldable stroller is in an unfolded state, the sliding lock locks the seat, the push rod, the support rod and the bottom frame while locking the top end of the push rod.

[0016] A foldable child stroller as described above, wherein the top end of the support rod is connected to a sliding shaft, and the side of the seat is provided with a sixth sliding groove arranged along the front-to-back direction for the sliding shaft to be inserted and slide forward and backward therein; the sliding lock is provided at the rear of the sixth sliding groove, and the sliding lock comprises a lock head and a lock tail, the front end of the lock head is in the shape of an inverted hook that can hook the sliding shaft to limit its forward sliding, a third spring for pressing the front end of the lock head downward is provided between the upper part of the front end of the lock head and the seat, and the middle part of the lock head is rotatably connected to the side of the seat; the lock tail is in the shape of a lever with a middle part rotatably connected to the side of the seat, and the front end of the lock tail presses from top to bottom on the rear end of the lock head.

[0017] In a foldable stroller as described above, an unlocking device is also provided on the side of the seat, and the unlocking device includes a seventh slide groove in the left and right directions which is concave inward from the side of the seat, and a locking block which can slide therein is provided in the seventh slide groove, and a protrusion is provided at the lower part of the locking block; when the locking block slides outward, the protrusion can slide to the top of the lock tail and press against the rear of the rotation connection between the lock tail and the seat, thereby limiting the rotation of the rear end of the lock tail upward and the front end downward; a fourth spring which pushes the lock block outward is provided between the lock block and the second slide groove.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The present invention is a foldable baby stroller, wherein the lower end of the backrest is connected to the rear end of the seat surface through a folding joint. The folding joint can simultaneously realize rotation connection and locking and unlocking, and the unlocking operation is simple and can be operated with one hand. In addition, the folding joint has a simple structure and is easy to manufacture.

[0020] 2. The seat includes a base and a seat surface, and the seat surface is rotatably connected to the base. In this way, the seat surface can be rotated 360 degrees on the base. First, it increases the fun. The rotatable seat can add fun to the children on the seat and prevent them from being irritated. Second, when there is a strong wind blowing head-on, the seat surface can be rotated 180 degrees on the base, so that the infants and children sitting on the seat surface can face the front of the vehicle, avoiding the infants and children's faces being directly blown by the wind and causing them to get sick. Of course, when there is a backrest on the seat, the backrest can be folded in a way that its top end is folded toward the front of the vehicle, and can also be folded in the following way: rotate the seat surface 180 degrees on the base, and then fold the backrest. At this time, the top end of the backrest is folded toward the rear of the vehicle, so that the volume after folding will be smaller.

[0021] 3. A sliding lock is provided between the top of the support rod and the bottom of the seat to limit the top of the support rod from sliding forward. When the foldable stroller is in the unfolded state, the sliding lock will lock the seat, push rod, support rod and chassis while locking the top of the push rod. An unlocking device is also provided on the side of the seat. When unlocking is required, the lock block is pressed inward by hand. After the lock block slides inward and disengages from the lock tail, the handle at the tail end of the lock tail is pulled upward. The lock tail can be rotated with the tail end upward and the front end downward, thereby unlocking. The unlocking device acts as a safety lock to prevent the sliding lock from being accidentally unlocked and causing a safety accident. In addition, pulling the handle at the tail end of the lock tail upward and pressing the lock block inward can be achieved with one hand. When holding the handle at the tail end of the lock tail, the ring finger can reach and press the lock block inward to achieve one-handed unlocking.

Brief Description of the Drawings

[0022] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0023] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0024] Figure 2 is an exploded view of the folding joint of the present invention;

[0025] Figure 3 is a cross-sectional view of a folding joint of the present invention;

[0026] Figure 4 It is a schematic diagram of the seat part of the present invention;

[0027] Figure 5 is an exploded view of the base of the present invention;

[0028] Figure 6 is a side view of the present invention;

[0029] Figure 7 It is a three-dimensional schematic diagram of the present invention from another angle;

[0030] Figure 8 It is a schematic diagram of the folding structure of the present invention;

[0031] Fig. 9 It is an exploded view of the folding structure of the present invention. [Specific implementation method]

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

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0034] like Figure 1-Figure 9 A foldable stroller for children shown in the figure comprises a foldable stroller frame 1 and a seat 2 connected thereto, wherein the seat 2 comprises a seat surface 21, a backrest 22 is arranged above the seat surface 21, and the lower end of the backrest 22 is connected to the rear of the seat surface 21 through a folding joint 23. The folding joint 23 can simultaneously realize rotation connection and locking and unlocking, and the unlocking operation is simple and can be operated with one hand. In addition, the folding joint has a simple structure and is easy to manufacture.

[0035] Specifically, Figure 1-Figure 3 As shown, the folding joint 23 includes a first rotating element 221 fixed at the lower end of the backrest 22 and a second rotating element 211 fixed at the rear end of the seat surface 21, a button 231 is provided between the first rotating element 221 and the second rotating element 211, a rotating shaft 232 is provided between the first rotating element 221, the second rotating element 211 and the button 231 and they are hinged through the rotating shaft 232, and a joint locking device for locking the first rotating element 221 and the second rotating element 211 to each other is provided between the first rotating element 221, the second rotating element 211 and the button 231.

[0036] Specifically, the joint locking device includes a first slide groove 2211 radially arranged on the end surface of the first rotating element 221, a second slide groove 2111 radially arranged on the end surface of the second rotating element 211, a third slide groove 2311 non-radially arranged on the end surface of the button 231, and one end of the third slide groove 2311 is close to the axis of the rotating shaft 232 and the other end is far away from the axis of the rotating shaft 232, and the joint locking device also includes a pin 233 passing through the first slide groove 2211, the second slide groove 2111 and the third slide groove 2311 in sequence; when the backrest 22 is flipped up, the second slide groove 2111 coincides with the first slide groove 2211, and the pin 233 is simultaneously located in the first slide groove 2211 and the second slide groove 2111, so that the first rotating element 221 and the second rotating element 211 cannot rotate relative to each other and the folding joint 23 is locked;

[0037] The button 231 is used to lock or unlock the folding joint 23. When the pin 233 is located in the first slide groove 2211 and the second slide groove 2111 at the same time, since the first slide groove 2211 and the second slide groove 2111 overlap and are restricted by the shaft 232 and the pin 233 at the same time, the first rotating element 221 and the second rotating element 211 cannot rotate relative to each other, and the first rotating element 221 cannot be folded downward, and the folding joint 23 is in a locked state. This can ensure safety and prevent the folding joint 23 from being accidentally folded to cause a safety accident.

[0038] An arc-shaped fourth slide groove 2212 is also provided on the end surface of the first rotating element 221, which is arranged around the axis of the rotating shaft 232. The end of the first slide groove 2211 close to the axis of the rotating shaft 232 is connected with one end of the fourth slide groove 2212. When the button 231 is pressed, the button 231 rotates around the rotating shaft 232, and at the same time, the third slide groove 2311 pushes the pin shaft 233 to slide along the first slide groove 2211 and the second slide groove 2111 toward the axis of the rotating shaft 232. After the pin shaft 233 slides to the end of the first slide groove 2211 and the second slide groove 2111 close to the axis of the rotating shaft 232, the pin shaft 233 enters the fourth slide groove 2212. At this time, the pin shaft 233 is simultaneously located in the second slide groove 2111 and the fourth slide groove 2212, and the first rotating element 221 and the second rotating element 211 can rotate relative to each other, thereby unlocking the folding joint 23.

[0039] When the button 231 is pressed downward, the button 231 will rotate around the rotating shaft 232. During the rotation process, the third sliding groove 2311 will push the pin 233. Under the action of the thrust, the pin 233 slides along the first sliding groove 2211 and the second sliding groove 2111 toward the axis of the rotating shaft 232. When the pin 233 slides to the end of the first sliding groove 2211 and the second sliding groove 2111 close to the axis of the rotating shaft 232, the pin 233 enters the fourth sliding groove 2212. Since the fourth sliding groove 2212 is arranged around the axis of the rotating shaft 232, that is, the sliding action of the pin 233 in the fourth sliding groove 2212 is a rotation action around the axis of the rotating shaft 232, and at this time, the second sliding groove 2111 is stationary relative to the pin 233. Therefore, the first rotating element 221 and the second rotating element 211 can rotate relative to each other, the folding joint 23 is unlocked, and the first rotating element 221 can be folded.

[0040] This folding method is easy to operate. It can be folded by pressing the button 231 downward with one hand without applying too much force. In addition, this folding structure can prevent safety accidents caused by misoperation because of the folding lock, which is safer and more stable.

[0041] Specifically, the button 231 is provided with a first spring 234 that enables the pin 233 to slide along the third slide slot 2311 in a direction away from the axis of the rotating shaft 232. The first spring 234 is sleeved on the rotating shaft 232, and one end of the first spring 234 is fixed on the button 231 and the other end is clamped on the pin 233. The first spring 234 provides a restoring force that automatically restores the folding joint 23 from the unlocked state to the locked state, and the first spring 234 can realize the automatic self-locking of the folding joint 23.

[0042] Specifically, Figure 1 , Figure 4 As shown, the seat 2 also includes a base 24, and the seat surface 21 is rotatably connected to the base 24. In this way, the seat surface 21 can be rotated 360 degrees on the base 2, which firstly increases the fun. The rotatable seat can add fun to the children on the seat and prevent them from being irritated; secondly, when there is a strong wind blowing head-on, the seat surface 21 can be rotated 180 degrees on the base 24, so that the infants and children sitting on the seat surface 21 can face the front direction of the vehicle, so as to prevent the infants and children from being directly blown by the wind on their faces and causing them to get sick. Of course, when there is a backrest 22 on the seat, the backrest 22 can be folded in a way that its top end is folded toward the front direction of the vehicle, and can also be folded in the following way: the seat surface 21 is rotated 180 degrees on the base 24, and then the backrest 22 is folded, and the top end of the backrest is folded toward the rear direction of the vehicle, so that the volume after folding will be smaller.

[0043] Specifically, the base 24 is provided with a rotation locking device for locking the seat 21 to limit its rotation on the base 24 .

[0044] Specifically, the center of the upper end of the base 24 is provided with a base shaft 241 protruding upward, and the center of the lower end of the seat surface 21 is provided with a shaft hole 212 for the base shaft 241 to be inserted and rotated therein; the upper end of the base 24 is also provided with an annular groove 242, and the lower end of the seat surface 21 is also provided with an annular boss 213 protruding downward and capable of rotating in the annular groove 242;

[0045] The rotation locking device includes a fifth slide groove 243 provided on the base 24 and connected to the annular groove 242. The fifth slide groove 243 is arranged radially along the base 24. A locking block 244 capable of sliding in the fifth slide groove 243 is provided in the fifth slide groove 243. A second spring 245 for pulling the locking block 244 toward the center of the base 24 is also provided in the fifth slide groove 243. The annular boss 213 is provided with at least one notch 214 capable of being inserted by the locking block 244. The notch 214 is preferably arranged one each in the front and rear directions of the seat surface 21. When the locking block 244 is pulled outward from the notch 214, the seat surface 21 can rotate freely on the base 24.

[0046] The rotating locking device is a pull-out unlocking method. When unlocked, the locking block 244 is inserted into the notch 214 under the action of the second spring 245, thereby causing the seat 21 to be stuck and unable to rotate; when unlocking, the locking block 244 is simply pulled outward by hand, and the locking block 244 will be pulled out of the notch 214, so that the seat 21 can rotate freely. Of course, the rotating locking device can also be a push-to-unlock unlocking method.

[0047] like Figure 5 As shown, the rotation locking device also includes a locking cover 246 for supporting the locking block 244 to prevent it from falling. The locking cover 246 is fixedly connected to the bottom surface of the base 24, and the fixed connection method is preferably through screw connection.

[0048] Preferably, Figure 6 , Figure 7As shown, the front end of the seat surface 21 is preferably rotatably connected to a front bracket 26, and the rotatable connection is preferably hinged; the top two sides of the front bracket 26 are preferably rotatably connected to armrests 27, and the rotatable connection is preferably hinged; the other end of the armrest 27 is detachable and rotatably connected to the middle of the backrest 22, and the two are preferably connected by snapping, that is, the middle of the backrest 22 protrudes outward to form a convex shaft, and the convex shaft is provided with a circle of grooves, and the two ends of the armrest 27 are provided with semicircular holes that can be sleeved on the convex shaft, and the holes are provided with hooks that can be inserted into the grooves and rotate therein. In this way, the backrest 22, the seat surface 21, the front bracket 26 and the armrest 27 form a parallelogram structure, so when the backrest 22 is folded, the front bracket 26 and the armrest 27 will be folded together. Of course, the connection between the armrest 27 and the middle of the backrest 22 can also be disassembled and folded separately.

[0049] Specifically, the stroller frame 1 includes a retractable push rod 11, a support rod 12 for supporting a seat 2 and an underframe 13 with wheels, the rear end of the seat 2 is rotatably connected to the middle part of the push rod 11, the lower end of the push rod 11 is rotatably and slidably connected to the underframe 13, the lower end of the support rod 12 is rotatably connected to the rear part of the underframe 13, the upper end of the support rod 12 is slidably and rotatably connected to the lower part of the seat 2, a support shaft 121 is provided in the middle part of the support rod 12, the support shaft 121 is pressed against the push rod 11 from top to bottom and is in detachable contact with the push rod 11; a sliding lock 14 is provided between the top end of the support rod 12 and the lower part of the seat 2 for limiting the top end of the support rod 12 from sliding forward, when the foldable child stroller is in the unfolded state, the sliding lock 14 locks the seat 2, the push rod 11, the support rod 12 and the underframe 13 while locking the top end of the push rod 11. The support shaft 121 and the push rod 11 are in detachable contact without hinge connection, so the structure is simpler and more convenient for maintenance and disassembly. In addition, because the connection between the support rod 12 and the push rod 11 is subjected to a large force, the fixed connection between the two is easy to be damaged, while the detachable contact connection of the support rod 12 can reduce wear and extend the service life. When the child stroller is in the unfolded state, the sliding lock 14 locks the top of the support rod 12 to restrict it from sliding forward on the seat 2, and the seat 2, the push rod 11, the support rod 12 and the bottom frame 13 are also locked, and the child stroller cannot be folded. In this way, the folding structure of the child stroller with the sliding lock 14 can ensure that the unfolded state is locked firmly, stably and safely; secondly, it can avoid accidental folding of the seat and cause safety accidents; thirdly, it is easy to fold when the stroller is folded, and only the sliding lock 14 needs to be operated.

[0050] When the stroller needs to be folded, the operation is also simple. You only need to operate the sliding lock 14 to release the top end of the support rod 12, and the top end of the support rod 12 can slide forward on the seat 2. At this time, the lower end of the push rod 11 can rotate downward on the base frame 13 and slide forward. The lower end of the support rod 12 rotates downward around the base frame 13, and the rear end of the seat 2 rotates downward around the push rod 11, so that the stroller is folded.

[0051] Specifically, the top of the support rod 12 is connected to a sliding shaft 122, and the side of the seat 2 is provided with a sixth sliding groove 25 arranged in the front-to-back direction for the sliding shaft 122 to be inserted and slide forward and backward therein; the sliding lock 14 is provided at the rear of the sixth sliding groove 25, and the sliding lock 14 includes a lock head 141 and a lock tail 142, the front end of the lock head 141 is in the shape of an inverted hook that can hook the sliding shaft 122 to limit its forward sliding, a third spring 143 for pressing the front of the lock head 141 downward is provided between the upper front part of the lock head 141 and the seat 2, and the middle part of the lock head 141 is rotatably connected to the side of the seat 2; the lock tail 142 is in the shape of a lever with the middle part rotatably connected to the side of the seat 2, and the front end of the lock tail 142 presses on the rear end of the lock head 141 from top to bottom. The tail end of the lock tail 142 is preferably provided with a handle. When the handle is pulled upward by hand, the front end of the lock tail portion 142 presses down the rear end of the lock head portion 141 , and the front end of the lock head portion 141 tilts upward, thereby releasing the sliding shaft 122 .

[0052] Specifically, the side of the seat 2 is also provided with an unlocking device 15, which includes a seventh slide groove 151 in the left and right directions that is concave inward from the side of the seat 2, and a lock block 152 that can slide therein is provided in the seventh slide groove 151, and a protrusion is provided at the lower part of the lock block 152; when the lock block 152 slides outward, the protrusion can slide to the top of the lock tail 142 and press against the rear of the rotation connection between the lock tail 142 and the seat 2, thereby limiting the rotation of the lock tail 142 with the rear end upward and the front end downward; a fourth spring 153 is provided between the lock block 152 and the second slide groove 2111 to push the lock block 152 outward. When unlocking is required, the lock block 152 is pressed inward by hand, and after the lock block 152 slides inward and disengages from the lock tail 142, the handle at the rear end of the lock tail 142 is pulled upward, and the lock tail 142 can be rotated with the rear end upward and the front end downward. The unlocking device 15 acts as a safety lock to prevent the sliding lock 14 from being accidentally unlocked and causing a safety accident. In addition, pulling the handle at the end of the lock tail 142 upward and pressing the lock block 152 inward can be achieved with one hand. When holding the handle at the end of the lock tail 142, the ring finger can reach and press the lock block 152 inward.

[0053] Preferably, Fig. 9As shown, the seat 2 is provided with a sixth slide groove 25 on both sides, and the left and right ends of the sliding shaft 122 are respectively inserted into the left and right sixth slide grooves 25, and each sixth slide groove 25 is provided with a sliding lock 14 at the rear, and only one of the sliding locks 14 is provided with an unlocking device 15 above; a connecting rod 144 for transmission is fixedly connected between the lock tail 142 of the left sliding lock 14 and the lock tail 142 of the right sliding lock 14. Such a symmetrical arrangement of a pair of sixth slide grooves 25 and a corresponding pair of sliding locks 14 makes the structure more stable and firm, and the operation is more labor-saving. At the same time, the connecting rod 144 can realize the unlocking device 4 and the sliding lock 14 by one hand, without the need for two hands to operate, which is simple and convenient to operate.

[0054] Preferably, a sliding frame is provided between the lower end of the push rod 11 and the bottom frame 13, the bottom frame 13 includes a sliding rod in the front-rear direction, the lower end of the push rod 11 is rotatably connected to the sliding frame, and the sliding frame is slidably connected to the sliding rod. In this way, the lower end of the push rod 11 can be slidably connected to the bottom frame 13, which is convenient for folding and has a small volume after folding.

[0055] Specifically, a stabilizing clip that can play a supporting role between the rear part of the seat 2 and the support rod 12 is provided between the two, and the stabilizing clip includes an elastic clip with an opening facing downward, and the upper end of the stabilizing clip is fixed under the rear part of the seat 2, and when the child stroller is in the unfolded state, the elastic clip at the lower end of the stabilizing clip is pressed down and clamped on the support rod 12, so that the structure is more stable.

[0056] like Figure 1 , Figure 6 , Figure 7 As shown, the top of the push rod 11 is preferably provided with a handle. The support rods 12 are preferably arranged in two on the left and right. The wheels are preferably two front wheels and two rear wheels. The front end of the chassis 13 is connected to the freely steerable front wheels, and the rear end of the chassis 13 is connected to the two rear wheels. At least one of the rear wheels is provided with a foot brake, which is more stable. The front wheel is preferably a universal wheel, and preferably a foot brake is provided on each of the two rear wheels, so that both left and right feet can step on the foot brake.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A foldable baby stroller, characterized in that: The invention comprises a foldable stroller frame (1) and a seat (2) connected thereto, wherein the seat (2) comprises a seat surface (21), a backrest (22) is provided above the seat surface (21), and the lower end of the backrest (22) is connected to the rear end of the seat surface (21) via a folding joint (23); The folding joint (23) comprises a first rotating element (221) fixed to the lower end of the backrest (22) and a second rotating element (211) fixed to the rear end of the seat surface (21); a button (231) is provided between the first rotating element (221) and the second rotating element (211); a rotating shaft (232) is provided between the first rotating element (221), the second rotating element (211) and the button (231) and the first rotating element (221), the second rotating element (211) and the button (231) are hingedly connected via the rotating shaft (232); and a joint locking device for locking the first rotating element (221) and the second rotating element (211) to each other is provided between the first rotating element (221), the second rotating element (211) and the button (231); The joint locking device comprises a first slide groove (2211) radially arranged on the end surface of the first rotating element (221), a second slide groove (2111) radially arranged on the end surface of the second rotating element (211), a third slide groove (2311) non-radially arranged on the end surface of the button (231), and one end of the third slide groove (2311) is close to the axis of the rotating shaft (232) and the other end is far from the axis of the rotating shaft (232), and the joint locking device also comprises a pin (233) passing through the first slide groove (2211), the second slide groove (2111) and the third slide groove (2311) in sequence; when the backrest (22) is flipped up, the second slide groove (2111) and the first slide groove (2211) overlap, and the pin (233) is simultaneously located in the first slide groove (2211) and the second slide groove (2111), so that the first rotating element (221) and the second rotating element (211) cannot rotate relative to each other, thereby locking the folding joint (23); The end surface of the first rotating element (221) is also provided with an arc-shaped fourth slide groove (2212) arranged around the axis of the rotating shaft (232); one end of the first slide groove (2211) close to the axis of the rotating shaft (232) is connected with one end of the fourth slide groove (2212); when the button (231) is pressed, the button (231) rotates around the rotating shaft (232), and at the same time, the third slide groove (2311) pushes the pin shaft (233) along the first slide groove (2211) and the second slide groove (2111) toward the rotating shaft. The folding joint (232) slides in the axial direction, and after the pin shaft (233) slides to one end of the first slide groove (2211) and the second slide groove (2111) close to the axis of the rotating shaft (232), the pin shaft (233) enters the fourth slide groove (2212). At this time, the pin shaft (233) is located in the second slide groove (2111) and the fourth slide groove (2212) at the same time, and enables the first rotating element (221) and the second rotating element (211) to rotate relative to each other, thereby unlocking the folding joint (23); The stroller frame (1) comprises a retractable push rod (11), a support rod (12) arranged in an X shape with the push rod (11) for supporting a seat (2), and a bottom frame (13) with wheels, wherein the rear end of the seat (2) is rotatably connected to the middle of the push rod (11), the lower end of the push rod (11) is rotatably and slidably connected to the bottom frame (13), the lower end of the support rod (12) is rotatably connected to the rear end of the bottom frame (13), the upper end of the support rod (12) is slidably and rotatably connected to the lower part of the seat (2), and the support rod (12) is rotatably connected to the rear end of the bottom frame (13). ) is provided with a support shaft (121) in the middle, the support shaft (121) is pressed against the push rod (11) from top to bottom and is in detachable contact with the push rod (11); a sliding lock (14) is provided between the top of the support rod (12) and the bottom of the seat (2) for limiting the top of the support rod (12) from sliding forward, when the foldable child stroller is in an unfolded state, the sliding lock (14) locks the top of the push rod (11) and simultaneously locks the seat (2), the push rod (11), the support rod (12) and the bottom frame (13); The top end of the support rod (12) is connected to a sliding shaft (122), and the side of the seat (2) is provided with a sixth sliding groove (25) arranged in the front-to-back direction for the sliding shaft (122) to be inserted and slide forward and backward therein; the sliding lock (14) is arranged at the rear of the sixth sliding groove (25), and the sliding lock (14) comprises a lock head (141) and a lock tail (142), the front end of the lock head (141) is in the shape of an inverted hook that can hook the sliding shaft (122) to limit its forward sliding, a third spring (143) for pressing the front part of the lock head (141) downward is provided between the upper front part of the lock head (141) and the seat (2), and the middle part of the lock head (141) is rotatably connected to the side of the seat (2); the lock tail (142) is in the shape of a lever, the middle part of which is rotatably connected to the side of the seat (2), and the front end of the lock tail (142) presses on the rear end of the lock head (141) from top to bottom.

2. A foldable baby stroller according to claim 1, characterized in that: The button (231) is provided with a first spring (234) capable of causing the pin shaft (233) to slide along the third slide groove (2311) in a direction away from the axis of the rotating shaft (232); the first spring (234) is sleeved on the rotating shaft (232); one end of the first spring (234) is fixed on the button (231) and the other end is clamped on the pin shaft (233).

3. A foldable baby stroller according to claim 1, characterized in that: The seat (2) further comprises a base (24), and the seat surface (21) is rotatably connected to the base (24).

4. A foldable baby stroller according to claim 3, characterized in that: The base (24) is provided with a rotation locking device for locking the seat surface (21) to limit its rotation on the base (24).

5. A foldable baby stroller according to claim 4, characterized in that: The center of the upper end of the base (24) is provided with a base rotating shaft (241) protruding upward, and the center of the lower end of the seat surface (21) is provided with a rotating shaft hole (212) for the base rotating shaft (241) to be inserted and rotated therein; the upper end of the base (24) is also provided with an annular groove (242), and the lower end of the seat surface (21) is also provided with an annular boss (213) protruding downward and capable of rotating in the annular groove (242); The rotation locking device comprises a fifth slide groove (243) provided on the base (24) and communicating with the annular groove (242); the fifth slide groove (243) is arranged radially along the base (24); a locking block (244) capable of sliding in the fifth slide groove (243) is provided in the fifth slide groove (243); a second spring (245) for pulling the locking block (244) toward the center of the base (24) is also provided in the fifth slide groove (243); at least one notch (214) capable of being inserted into the locking block (244) is provided on the annular boss (213); when the locking block (244) is pulled outward from the notch (214), the seat surface (21) can rotate freely on the base (24).

6. A foldable baby stroller according to claim 1, characterized in that: The side of the seat (2) is also provided with an unlocking device (15), the unlocking device (15) comprising a seventh slide groove (151) in the left and right directions which is concave inward from the side of the seat (2), the seventh slide groove (151) is provided with a locking block (152) which can slide therein, and the lower part of the locking block (152) is provided with a protrusion; when the locking block (152) slides outward, the protrusion can slide above the lock tail portion (142) and press against the rear of the rotation connection between the lock tail portion (142) and the seat (2), thereby limiting the upward rotation of the rear end of the lock tail portion (142) and the downward rotation of the front end; a fourth spring (153) is provided between the lock block (152) and the second slide groove (2111) for pushing the lock block (152) outward.

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