A stroller foldable in linkage
The push rod assembly drives the slider and linkage rod to bring the front and rear wheel brackets closer together, realizing the linkage folding of the stroller. This solves the problems of the stroller's thickness and the need for two-handed operation, achieving portability and one-handed folding.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHONGSHAN TONGBOSHI DAILY PROD CO LTD
- Filing Date
- 2023-12-15
- Publication Date
- 2026-05-29
AI Technical Summary
Existing strollers have components that are stacked together when folded, resulting in excessive thickness, which makes them inconvenient to store and transport. Furthermore, traditional strollers require both hands to operate and cannot be folded with one hand when holding an infant.
The bottom drive slider of the push rod assembly slides down along the two rear wheel brackets, driving the linkage rod to bring the front wheel bracket closer to the push rod assembly, thus realizing the linkage folding of the front and rear wheel brackets, which can be operated with one hand.
The thickness and width of the stroller have been reduced when folded, making it easier to carry and enabling one-handed folding, thus improving the user experience.
Smart Images
Figure CN117601946B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of folding stroller technology, and specifically relates to a stroller that can be folded in conjunction with other components. Background Technology
[0002] Strollers are a common mode of transportation for infants and toddlers. They generally consist of a frame and a seat mounted on the frame. To facilitate storage and transportation, the frame is often designed to be foldable. In existing technology, the frame typically includes a push rod assembly, a front support, and a rear frame. To achieve foldability, a hinged turntable is usually provided at the connection between the push rod assembly, the front frame, and the rear frame. During rotation, the push rod assembly and the front support fold relative to the rear support on both sides.
[0003] However, the above structure has two drawbacks. First, the components are stacked together after folding, resulting in a large thickness after folding. Furthermore, folding the push rod assembly downwards from above the front and rear supports further increases the thickness of the stroller after folding, making it inconvenient to store and transport even though the stroller can be folded. Second, traditional stroller folding requires two hands. When a user is holding an infant with one hand, it is inconvenient to use the other hand to operate the folding stroller. Therefore, developing a stroller with a smaller thickness after folding and convenient one-handed folding operation has become an urgent problem for those skilled in the art. Summary of the Invention
[0004] The main objective of this invention is to provide a foldable stroller that can be folded in conjunction with the push rod assembly. As the bottom of the push rod assembly drives the sliding member to slide downwards along the two rear wheel supports, the two rear wheel supports rotate and move closer together. Simultaneously, the sliding member, via two linkage rods, drives the other end of the front wheel support to move closer to the two rear wheel supports, and simultaneously drives one end of the front wheel support to slide upwards along the push rod assembly, thus completing the folding function. This design allows both the front wheel support and the two rear wheel supports to fold closer to the push rod assembly, reducing the folded thickness of the stroller. Firstly, it overcomes the disadvantage that folding the push rod assembly downwards from above the front and rear supports increases the stroller's thickness, making it inconvenient for storage and transportation. Furthermore, the sliding member bringing the two rear wheel supports closer together further reduces the stroller's width, increasing its portability. Secondly, this invention allows for folding the stroller with just one hand, overcoming the disadvantage of traditional strollers requiring two hands to fold, making it difficult to simultaneously fold the stroller and pick up the infant.
[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:
[0006] A foldable stroller includes: a push rod assembly, a front wheel bracket, and two rear wheel brackets. One end of the front wheel bracket is fitted onto the push rod assembly and can slide up and down along the push rod assembly. The two rear wheel brackets are pivotally hinged together, and the pivot joint of the two rear wheel brackets is also pivotally hinged to the upper side of the front wheel bracket. The stroller also includes: a sliding member and two linkage rods. The two sides of the sliding member are respectively fitted onto the two rear wheel brackets and can slide up and down along the two rear wheel brackets. The bottom of the push rod assembly is connected to the sliding member. The components are pivotally hinged, with one end of each of the two linkage rods pivotally hinged to both sides of the front wheel bracket near the other end, and the other end pivotally hinged to both ends of the sliding component. During folding, the bottom of the push rod assembly drives the sliding component to slide downwards along the two rear wheel brackets, causing the two rear wheel brackets to rotate closer together. The sliding component also drives the other end of the front wheel bracket to move closer to the two rear wheel brackets via the two linkage rods, simultaneously driving one end of the front wheel bracket to slide upwards along the push rod assembly.
[0007] As a preferred embodiment of a foldable stroller, the sliding member includes a folding locking assembly, which includes two locking rods located on both sides of the sliding member, one end of which can move closer to or further away from each other. The two rear wheel supports are respectively provided with an unfolding locking hole and a folding locking hole at the other end of the locking rods. One end of the two locking rods moves away from each other, while the other end passes through both sides of the sliding member and extends into the unfolding locking hole or the folding locking hole of the two rear wheel supports to lock, thus placing the foldable stroller in an unfolded or folded state. Another lock rod moves closer to each other, while the other end retracts from the unfolding locking hole or the folding locking hole into both sides of the sliding member to release the lock, allowing the sliding member to slide up and down along the surfaces of the two rear wheel supports.
[0008] As a preferred embodiment of a foldable stroller, the folding locking assembly further includes: two guide rotating blocks and a steering drive block disposed within the sliding member between one end of the two locking rods; the two guide rotating blocks are rotatably connected to the interior of the sliding member, one end of each guide rotating block is pivotally hinged to one end of each locking rod, and the other end of each guide rotating block is pivotally hinged; the steering drive block is mounted at the pivotal hinge of the two guide rotating blocks and drives the two guide rotating blocks to rotate relative to the sliding member; the steering drive block moves in a direction perpendicular to the two locking rods toward and away from the two locking rods, and the steering drive block drives the two guide rotating blocks to rotate relative to the sliding member through the other end of each guide rotating block, thereby causing one end of each guide rotating block to move closer to and further away from each other.
[0009] As a preferred embodiment of a foldable stroller, the folding locking assembly further includes: a folding locking switch mounted on the push rod assembly; a first pull rope disposed within the push rod assembly connecting the folding locking switch and the steering drive block; and a first spring sleeved on the first pull rope, one end of which abuts against the steering drive block, and the other end of which abuts against the inner side of the sliding member. When the folding locking switch is driven by an external force, it drives the first pull rope to pull the steering drive block, causing the steering drive block to move away from the two locking rods in a direction perpendicular to the two locking rods, and the first spring is compressed. When the external force is removed, the first spring drives the steering drive block, causing the steering drive block to move back to its original position in a direction perpendicular to the two locking rods, and the steering drive block drives the folding locking switch to reset via the first pull rope.
[0010] As a preferred embodiment of a foldable stroller, the two rear wheel brackets are provided with positioning protrusions at the top positions of the corresponding sliding members. The positioning protrusions can abut against the sliding members to position the sliding members in the unfolded state.
[0011] As a preferred embodiment of a foldable stroller, the two rear wheel brackets are pivotally hinged via a hinge shaft; the hinge shaft extends toward the front wheel bracket to form a hinge arm, and a hinge bracket is provided on the upper side of the front wheel bracket, with the hinge arm extending into the hinge bracket for pivotal hinge.
[0012] As a preferred embodiment of a foldable stroller, the push rod assembly includes: an inner sleeve rod, an outer sleeve rod sleeved on the outside of the inner sleeve rod for sliding of the inner sleeve rod, a telescopic locking assembly for locking and unlocking the inner sleeve rod relative to the outer sleeve rod, and a handle fixed to the top of the inner sleeve rod. The bottom of the outer sleeve rod is pivotally hinged to the sliding member.
[0013] As a preferred embodiment of a foldable stroller, the telescopic locking assembly includes: a telescopic locking shell disposed within the inner sleeve rod, a locking block disposed within the telescopic locking shell, and a second spring disposed between the locking block and the inner wall of the inner sleeve rod; a horizontal guide groove for the locking block is provided within the telescopic locking shell, the locking block is disposed within the guide groove, the second spring is sandwiched between one end of the locking block and the inner wall of the inner sleeve rod, and locking holes are provided on both the inner sleeve rod and the outer sleeve rod corresponding to the position of the locking block; the second spring pushes the locking block along the guide groove of the locking block out of the telescopic locking shell and then passes through the locking holes of the inner sleeve rod and the outer sleeve rod in sequence, so that the inner sleeve rod is locked relative to the outer sleeve rod; the locking block is driven to retract from the locking holes of the inner sleeve rod and the outer sleeve rod back into the telescopic locking shell, the inner sleeve rod is unlocked relative to the outer sleeve rod, thereby causing the second spring to be in a compressed state.
[0014] As a preferred embodiment of a foldable stroller, the telescopic locking assembly further includes: a guide drive block disposed within the locking block; a guide pin passing through the telescopic locking shell, the locking block, and the guide drive block; a telescopic locking switch disposed on the handlebar; and a second pull rope disposed inside the inner sleeve rod connecting the guide drive block and the telescopic locking switch. The telescopic locking shell has first guide grooves on both sides along the telescopic direction of the push rod assembly, and the locking block has second guide grooves on both sides along the telescopic direction of the push rod assembly. The bottom end of the second guide groove is close to the retracted direction of the locking block, and the top end of the second guide groove is close to the extended direction of the locking block. The guide pin passes through the first guide groove and the second guide groove. The guide drive block drives the telescopic locking switch, which in turn drives the second pull rope to move the guide drive block upward along the telescopic direction of the push rod assembly. Simultaneously, the guide pin slides upward along the first guide groove and slides along the second guide groove, guiding the locking block to retract towards the telescopic locking shell. The locking block compresses the second spring. When the external force is removed, the second spring resets, causing the locking block to extend outward toward the telescopic locking shell. The locking block drives the guide pin to move downward along the first and second guide grooves towards the telescopic direction of the push rod assembly, thereby causing the guide drive block to move downward in the telescopic direction of the push rod assembly, thus resetting the second pull rope and the telescopic locking switch.
[0015] As a preferred embodiment of a foldable stroller, the push rod assembly further includes an anti-slip cap, which is fitted onto the inner sleeve rod and fixed to the opening at the top of the outer sleeve rod. The anti-slip cap abuts against the locking block and the telescopic locking shell to prevent the inner sleeve rod from coming off relative to the outer sleeve rod.
[0016] The beneficial effects of this invention are:
[0017] This invention proposes a foldable stroller, comprising: a push rod assembly, a front wheel bracket, two rear wheel brackets, a slider, and two linkage rods. One end of the front wheel bracket is fitted onto the push rod assembly and can slide up and down along the push rod assembly. The two rear wheel brackets are pivotally hinged together, and the pivot joint of the two rear wheel brackets is also pivotally hinged to the upper side of the front wheel bracket. The two sides of the slider are respectively fitted onto the two rear wheel brackets and can slide up and down along the two rear wheel brackets. The bottom of the push rod assembly is pivotally hinged to the slider. One end of each of the two linkage rods is pivotally hinged to the two sides of the front wheel bracket near the other end, and the other end is pivotally hinged to both ends of the slider. As the bottom of the push rod assembly drives the slider to slide down along the two rear wheel brackets, the two rear wheel brackets rotate and move closer together. The slider also drives the other end of the front wheel bracket to move closer to the two rear wheel brackets through the two linkage rods, simultaneously driving one end of the front wheel bracket to slide up along the push rod assembly, thereby completing the folding function. The above-mentioned solution allows both the front wheel bracket and the two rear wheel brackets to fold closer to the push rod assembly, reducing the folded thickness of the stroller. Firstly, it overcomes the disadvantage that folding the push rod assembly downwards from the top of the front and rear brackets increases the stroller's thickness, making it inconvenient to store and transport. Furthermore, the sliding mechanism brings the two rear wheel brackets closer together, further reducing the stroller's width and increasing its portability. Secondly, this invention allows the stroller to be folded using only one hand, overcoming the disadvantage of traditional strollers requiring two hands to fold, making it impossible to simultaneously fold the stroller and pick up the infant. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and all of them fall within the protection scope of the present invention.
[0019] Figure 1 This is a schematic diagram of the unfolded state of the foldable stroller provided by the present invention;
[0020] Figure 2 yes Figure 1 The diagram shows the structure of the foldable stroller in its folded state.
[0021] Figure 3 yes Figure 1 An exploded view of the linked and foldable stroller push rod assembly shown.
[0022] Figure 4 yes Figure 3 The diagram shows the structure of the foldable stroller push rod assembly.
[0023] Figure 5 yes Figure 3 The diagram shows the structure of the front wheel support of the foldable stroller.
[0024] Figure 6 yes Figure 3 The diagram shows the structure of the two rear wheel supports and sliding parts of the foldable stroller.
[0025] Figure 7 yes Figure 1 A partially exploded view of the push rod assembly of the foldable stroller shown.
[0026] Figure 8 yes Figure 7 A partially enlarged schematic diagram of the foldable stroller shown;
[0027] Figure 9 yes Figure 1 The diagram shows a partial exploded view of the rear wheel supports and sliding parts of the foldable stroller.
[0028] Figure 10 yes Figure 9 The diagram shows a partially enlarged view of the foldable stroller. Detailed Implementation
[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. It should be noted that, without conflict, the various features in the embodiments of the invention can be combined with each other, and the combined embodiments are still within the protection scope of the invention.
[0031] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0032] Strollers are a common mode of transportation for infants and toddlers. They generally consist of a frame and a seat mounted on the frame. To facilitate storage and transportation, the frame is often designed to be foldable. In existing technology, the frame typically includes a push rod assembly, a front support, and a rear frame. To achieve foldability, a hinged turntable is usually provided at the connection between the push rod assembly, the front frame, and the rear frame. During rotation, the push rod assembly and the front support fold relative to the rear support on both sides.
[0033] However, the above structure has two drawbacks. First, the components are stacked together after folding, resulting in a large thickness after folding. Furthermore, folding the push rod assembly downwards from above the front and rear supports further increases the thickness of the stroller after folding, making it inconvenient to store and transport even though the stroller can be folded. Second, traditional stroller folding requires two hands. When a user is holding an infant with one hand, it is inconvenient to use the other hand to operate the folding stroller. Therefore, developing a stroller with a smaller thickness after folding and convenient one-handed folding operation has become an urgent problem for those skilled in the art.
[0034] In this invention, such as Figure 1 , Figure 2 and Figure 3 As shown, this embodiment of the invention provides a foldable stroller, which includes: a push rod assembly 10, a front wheel bracket 20, and two rear wheel brackets 30. One end of the front wheel bracket 20 is sleeved on the push rod assembly 10 and can slide up and down along the push rod assembly 10. The two rear wheel brackets 30 are pivotally connected, and the pivot joint of the two rear wheel brackets 30 is also pivotally connected to the upper side of the front wheel bracket 20.
[0035] The system also includes: a sliding member 30 and two linkage rods 50. The two sides of the sliding member 30 are respectively sleeved on the two rear wheel brackets 30 and can slide up and down along the two rear wheel brackets 30. The bottom of the push rod assembly 10 is pivotally hinged to the sliding member 30. One end of each of the two linkage rods 50 is pivotally hinged to the two sides of the front wheel bracket 20 near the other end, and the other end is pivotally hinged to both ends of the sliding member 30.
[0036] During the folding process, the bottom of the push rod assembly 10 drives the slider 30 to slide downward along the two rear wheel brackets 30, causing the two rear wheel brackets 30 to rotate closer together. The slider 30 also drives the other end of the front wheel bracket 20 to move closer to the two rear wheel brackets 30 through the two linkage rods 50, and simultaneously drives one end of the front wheel bracket 20 to slide upward along the push rod assembly 10, thereby completing the linkage folding function.
[0037] During the unfolding process, the bottom of the push rod assembly 10 drives the sliding member 30 to slide upward along the two rear wheel brackets 30, causing the two rear wheel brackets 30 to rotate away from each other. The sliding member 30 also drives the other end of the front wheel bracket 20 away from the two rear wheel brackets 30 through the two linkage rods 50, and simultaneously drives one end of the front wheel bracket 20 to slide downward along the push rod assembly 10, thereby completing the linkage unfolding function.
[0038] In this invention, the above-mentioned solution is adopted so that the front wheel bracket 20 and the two rear wheel brackets 30 are folded closer to the push rod assembly 10, reducing the folded thickness of the stroller. Firstly, this overcomes the disadvantage that folding the push rod assembly 10 downwards from the top position of the front and rear brackets increases the thickness of the stroller, making it inconvenient to store and transport. Furthermore, the sliding member 30 brings the two rear wheel brackets 30 closer together, further reducing the width of the stroller and increasing its portability. Secondly, this invention allows the stroller to be folded by driving the push rod assembly 10 with one hand, overcoming the disadvantage that traditional strollers require two hands to fold, making it impossible to simultaneously fold the stroller and pick up the infant, thus improving the user experience and promoting the use of strollers.
[0039] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, in order to enable the slider 30 to lock and unlock relative to the two rear wheel brackets 30, the slider 40 includes: a folding locking assembly 41, the folding locking assembly 41 including: two locking rods 42 disposed on both sides inside the slider 30, one end of which can move closer to and further away from each other, and the two rear wheel brackets 30 are respectively provided with an unfolding locking hole 31 and a folding locking hole 32 at the other end of the locking rods 42;
[0040] One end of each of the two locking rods 42 is far apart from each other, and the other end passes through both sides of the sliding member 30 and extends into the unfolding locking hole 31 or the folding locking hole 32 of the two rear wheel brackets 30 to lock, so that the foldable stroller is in an unfolded state or a folded state.
[0041] One end of each of the two locking rods 42 is brought close to each other, and the other end is retracted from the two unfolding locking holes 31 or the two folding locking holes 32 into the sides of the sliding member 30 to release the lock, so that the sliding member 30 can slide up and down along the surfaces of the two rear wheel brackets 30.
[0042] During the folding process, first drive one end of the two locking rods 42 closer to each other, so that the other end of the two locking rods 42 retracts from the two unfolding locking holes 31 into the sides of the sliding member 30 to release the lock. The sliding member 30 slides along the two rear wheel brackets 30 to the position of the folding locking hole 32. Then drive one end of the two locking rods 42 away from each other, so that the other end of the two locking rods 42 passes through the sides of the sliding member 30 and extends into the folding locking hole 32 of the two rear wheel brackets 30 to engage, so that the sliding member 30 is locked relative to the two rear wheel brackets 30, thereby folding the stroller. To unfold the stroller, simply use the reverse operation sequence.
[0043] In order to drive one end of the two locking rods 42 to move closer and further apart, the folding locking assembly 41 further includes: two guide rotating blocks 43 and a steering drive block 44 disposed in the slider 30 between one end of the two locking rods 42;
[0044] The two guide rotating blocks 43 are rotatably connected to the inside of the sliding member 30. One end of the two guide rotating blocks 43 is pivotally hinged to one end of the two locking rods 42, and the other end of the two guide rotating blocks 43 is pivotally hinged. The steering drive block 44 is installed at the pivot hinge of the two guide rotating blocks 43 to drive the two guide rotating blocks 43 to rotate relative to the sliding member 30.
[0045] The steering drive block 44 moves in a direction perpendicular to the two locking rods 42 toward and away from the two locking rods 42. The steering drive block 44 drives the two guide rotating blocks 43 to rotate relative to the sliding member 30 through the other end of the two guide rotating blocks 43. As a result, one end of the two guide rotating blocks 43 drives one end of the two locking rods 42 to move closer to and away from each other.
[0046] In order to drive the steering drive block 44 to move closer to and further away from the two locking rods 42 in a direction perpendicular to the two locking rods 42, the folding locking assembly 41 further includes: a folding locking switch 45 installed on the push rod assembly 10, a first pull rope 46 disposed in the push rod assembly 10 connecting the folding locking switch 45 and the steering drive block 44, and a first spring 47 sleeved on the first pull rope 46 with one end abutting against the steering drive block 44 and the other end abutting against the inner side of the slider 30;
[0047] When the folding locking switch 45 is driven by an external force, it drives the first pull rope 46 to pull the steering drive block 44, so that the steering drive block 44 moves in a direction away from the two locking rods 42 in a direction perpendicular to the two locking rods 42, and the first spring 47 is compressed.
[0048] When the external force is removed, the first spring 47 drives the steering drive block 44, causing the steering drive block 44 to move and reset in a direction perpendicular to the two locking rods 42. The steering drive block 44 then drives the folding locking switch 45 to reset via the first pull rope 46.
[0049] To facilitate positioning the stroller in the unfolded state, the two rear wheel brackets 30 are provided with positioning protrusions 33 at the top positions of the corresponding sliding members 30. The positioning protrusions 33 can abut against the sliding members 30, thereby positioning the sliding members 30 in the unfolded state. That is, when the sliding members 30 abut against the positioning protrusions, the two locking rods 42 are directly opposite the unfolded locking holes 31 of the two rear wheel brackets 30.
[0050] In order to enable the two rear wheel brackets 30 to be pivotally hinged to each other and also pivotally hinged to the upper side of the front wheel bracket 20, the two rear wheel brackets 30 are pivotally hinged through a hinge shaft 34; the hinge shaft 34 extends toward the front wheel bracket 20 to form a hinge arm 341, and the upper side of the front wheel bracket 20 is provided with a hinge bracket 21 at the position corresponding to the hinge arm 341, and the hinge arm 341 extends into the hinge bracket 21 for pivotal hinge.
[0051] To enable the push rod assembly 10 to be retractable in both locked and unlocked states, the push rod assembly 10 includes: an inner sleeve rod 11, an outer sleeve rod 12 sleeved on the outside of the inner sleeve rod 11 for sliding of the inner sleeve rod 11, a telescopic locking assembly 13 for locking and unlocking the inner sleeve rod 11 relative to the outer sleeve rod 12, and a handle 14 fixed to the top of the inner sleeve rod 11. The bottom of the outer sleeve rod 12 is pivotally hinged to the slider 30.
[0052] Specifically, the telescopic locking assembly 13 includes: a telescopic locking shell 131 disposed within the inner sleeve rod 11, a locking block 132 disposed within the telescopic locking shell 131, and a second spring 133 disposed between the locking block 132 and the inner wall of the inner sleeve rod 11;
[0053] A horizontal locking block guide groove 1311 is provided inside the telescopic locking shell 131. The locking block 132 is disposed in the locking block guide groove 1311. The second spring 133 is sandwiched between one end of the locking block 132 and the inner wall of the inner sleeve rod 11. The inner sleeve rod 11 and the outer sleeve rod 12 are provided with locking through holes 111 and 121 respectively at the positions corresponding to the locking block 132.
[0054] The second spring 133 pushes the locking block 132 out of the telescopic locking shell 131 along the locking block guide groove 1311 and then passes through the locking holes 111 and 121 of the inner sleeve rod 11 and the outer sleeve rod 12 in sequence, so that the inner sleeve rod 11 is locked relative to the outer sleeve rod 12.
[0055] The locking block 132 is driven to retract from the locking holes 111 and 121 of the inner sleeve rod 11 and the outer sleeve rod 12 into the telescopic locking shell 131, and the inner sleeve rod 11 is unlocked relative to the outer sleeve rod 12, thereby causing the second spring 133 to be in a compressed state.
[0056] In order to drive the locking block 132 to lock and unlock, the telescopic locking assembly 13 further includes: a guide drive block 134 disposed in the locking block 132, a guide pin 135 passing through the telescopic locking shell 131, the locking block 132 and the guide drive block 134, a telescopic locking switch 136 disposed in the handle 14, and a second pull rope 137 disposed inside the inner sleeve rod 11 to connect the guide drive block 134 and the telescopic locking switch 136;
[0057] The telescopic locking shell 131 has a first guide groove 1312 on both sides along the telescopic direction of the push rod assembly 10, and the locking block 132 has a second guide groove 1321 on both sides along the telescopic direction of the push rod assembly 10. The bottom end of the second guide groove 1321 is close to the direction in which the locking block 132 retracts, and the top end of the second guide groove 1321 is close to the direction in which the locking block 132 extends. The guide pin 135 passes through the first guide groove 1312, the second guide groove 1321 and the guide drive block 134.
[0058] The telescopic locking switch 136 drives the second pull rope 137 to move upward along the telescopic direction of the push rod assembly 10, and the guide pin 135 slides upward along the first guide groove 1312 and simultaneously slides along the second guide groove 1321, guiding the locking block 132 to retract towards the telescopic locking shell 131, and the locking block 132 compresses the second spring 133;
[0059] When the external force is removed, the second spring 133 resets, causing the locking block 132 to extend outward toward the telescopic locking shell 131. The locking block 132 drives the guide pin 135 to move downward along the first guide groove 1312 and the second guide groove 1321 in the telescopic direction of the push rod assembly 10, thereby driving the guide drive block 134 to move downward in the telescopic direction of the push rod assembly 10, so that the second pull rope 137 and the telescopic locking switch 136 reset.
[0060] To prevent the push rod assembly 10 from disengaging during extension and retraction, the push rod assembly 10 further includes an anti-disengagement cap 15. The anti-disengagement cap 15 is fitted onto the inner sleeve rod 11 and fixed to the opening at the top of the outer sleeve rod 12. The anti-disengagement cap 15 can abut against the locking block 132 and the telescopic locking shell 131 to prevent the inner sleeve rod 11 from disengaging relative to the outer sleeve rod 12.
[0061] The present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and alterations to these embodiments can be made without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.
Claims
1. A foldable stroller, characterized in that, include: The assembly includes a push rod assembly, a front wheel bracket, and two rear wheel brackets. One end of the front wheel bracket is fitted onto the push rod assembly and can slide up and down along the push rod assembly. The two rear wheel brackets are pivotally connected, and the pivot joint of the two rear wheel brackets is also pivotally connected to the upper side of the front wheel bracket. The system also includes: a sliding member and two linkage rods. The two sides of the sliding member are respectively sleeved on the two rear wheel brackets and can slide up and down along the two rear wheel brackets. The bottom of the push rod assembly is pivotally hinged to the sliding member. One end of each of the two linkage rods is pivotally hinged to the two sides of the front wheel bracket near the other end, and the other end is pivotally hinged to both ends of the sliding member. During the folding process, the bottom of the push rod assembly drives the slider to slide downward along the two rear wheel brackets, causing the two rear wheel brackets to rotate closer together. The slider also drives the other end of the front wheel bracket to move closer to the two rear wheel brackets through the two linkage rods, and simultaneously drives one end of the front wheel bracket to slide upward along the push rod assembly.
2. The foldable stroller as described in claim 1, characterized in that, The sliding component includes a folding locking assembly, which includes two locking rods located on both sides of the sliding component, one end of which can move closer to and away from each other, and the two rear wheel brackets are respectively provided with an unfolding locking hole and a folding locking hole at the other end of the locking rods. One end of each of the two locking rods is far apart from each other, and the other end passes through both sides of the slider and extends into the unfolding locking hole or the folding locking hole of the two rear wheel brackets to lock, so that the stroller that can be linked and folded is in an unfolded state or a folded state. One end of each of the two locking rods is brought close to each other, and the other end is retracted from the two unfolding locking holes or the two folding locking holes into the sides of the slider to release the lock, so that the slider can slide up and down along the surfaces of the two rear wheel brackets.
3. The foldable stroller as described in claim 2, characterized in that, The folding locking assembly further includes: two guide rotating blocks and a steering drive block disposed within the slider and located between one end of the two locking rods; The two guide rotating blocks are rotatably connected to the inside of the sliding member. One end of each guide rotating block is pivotally hinged to one end of each locking rod, and the other end of each guide rotating block is pivotally hinged. The steering drive block is installed at the pivot hinge of the two guide rotating blocks to drive the two guide rotating blocks to rotate relative to the sliding member. The steering drive block moves in a direction perpendicular to the two locking rods toward and away from the two locking rods. The steering drive block drives the two guide rotating blocks to rotate relative to the sliding member through the other end of the two guide rotating blocks. As a result, one end of the two guide rotating blocks drives one end of the two locking rods to move closer to and away from each other.
4. The foldable stroller as described in claim 3, characterized in that, The folding locking assembly further includes: a folding locking switch installed on the push rod assembly, a first pull rope disposed inside the push rod assembly connecting the folding locking switch and the steering drive block, and a first spring sleeved on the first pull rope, with one end abutting against the steering drive block and the other end abutting against the inner side of the slider. When the folding locking switch is driven by an external force, it drives the first pull rope to pull the steering drive block, causing the steering drive block to move in a direction away from the two locking rods along a direction perpendicular to the two locking rods, and the first spring is compressed. When the external force is removed, the first spring drives the steering drive block, causing the steering drive block to move and reset in a direction perpendicular to the two locking rods. The steering drive block then drives the folding lock switch to reset via the first pull rope.
5. The foldable stroller as described in claim 2, characterized in that, The two rear wheel brackets are provided with positioning protrusions at the top positions of the corresponding sliding members. The positioning protrusions can abut against the sliding members to position the sliding members in the locked position when they are in the unfolded state.
6. The foldable stroller as described in claim 1, characterized in that, The two rear wheel brackets are pivotally hinged via a hinge shaft; The hinge shaft extends toward the front wheel bracket to form a hinge arm, and the front wheel bracket is provided with a hinge bracket on its upper side. The hinge arm extends into the hinge bracket and pivots.
7. The foldable stroller as described in claim 4, characterized in that, The push rod assembly includes: an inner sleeve rod, an outer sleeve rod sleeved on the outside of the inner sleeve rod for sliding of the inner sleeve rod, a telescopic locking assembly for locking and unlocking the inner sleeve rod relative to the outer sleeve rod, and a handle fixed to the top of the inner sleeve rod. The bottom of the outer sleeve rod is pivotally hinged to the sliding member.
8. The foldable stroller as described in claim 7, characterized in that, The telescopic locking assembly includes: a telescopic locking shell disposed within the inner sleeve rod, a locking block disposed within the telescopic locking shell, and a second spring disposed between the locking block and the inner wall of the inner sleeve rod; A horizontal locking block guide groove is provided inside the telescopic locking shell. The locking block is located in the locking block guide groove. The second spring is clamped between one end of the locking block and the inner wall of the inner sleeve rod. The inner sleeve rod and the outer sleeve rod are provided with locking through holes corresponding to the position of the locking block. The second spring pushes the locking block against the telescopic locking shell along the locking block guide groove and then passes through the locking holes of the inner sleeve rod and the outer sleeve rod in sequence, so that the inner sleeve rod is locked relative to the outer sleeve rod; The locking block is retracted from the locking holes of the inner sleeve rod and the outer sleeve rod into the telescopic locking housing, and the inner sleeve rod is unlocked relative to the outer sleeve rod, thereby causing the second spring to be in a compressed state.
9. The foldable stroller as described in claim 8, characterized in that, The telescopic locking assembly further includes: a guide drive block disposed within the locking block, a guide pin passing through the telescopic locking shell, the locking block, and the guide drive block, a telescopic locking switch disposed on the handle, and a second pull rope disposed inside the inner sleeve rod connecting the guide drive block and the telescopic locking switch; The telescopic locking shell has a first guide groove on both sides along the telescopic direction of the push rod assembly, and the locking block has a second guide groove on both sides along the telescopic direction of the push rod assembly. The bottom end of the second guide groove is close to the direction of the locking block retracting, and the top end of the second guide groove is close to the direction of the locking block extending. The guide pin passes through the first guide groove, the second guide groove and the guide drive block. The telescopic locking switch drives the second pull rope to move the guide drive block upward along the telescopic direction of the push rod assembly. The guide pin slides upward along the first guide groove and simultaneously slides along the second guide groove, guiding the locking block to retract towards the telescopic locking shell, and the locking block compresses the second spring. When the external force is removed, the second spring resets, causing the locking block to extend outward toward the telescopic locking shell. The locking block drives the guide pin to move downward along the first guide groove and the second guide groove toward the telescopic direction of the push rod assembly, thereby causing the guide drive block to move downward toward the telescopic direction of the push rod assembly, so that the second pull rope and the telescopic locking switch reset.
10. The foldable stroller as described in claim 8, characterized in that, The push rod assembly further includes an anti-disengagement cap, which is fitted onto the inner sleeve rod and fixed to the opening at the top of the outer sleeve rod. The anti-disengagement cap can abut against the locking block and the telescopic locking shell to prevent the inner sleeve rod from disengaging relative to the outer sleeve rod.