A stroller foldable in linkage

Abstract

The present application provides a linkage foldable baby carriage, which comprises a hand pushing rod assembly, a sleeve assembly sleeved on the hand pushing rod assembly and slidable relative to the hand pushing rod assembly, a seat bracket assembly pivotally connected to both sides of the hand pushing rod assembly and the sleeve assembly respectively, a front carriage leg assembly and a rear carriage leg assembly; the seat bracket assembly comprises a seat bracket rod pivotally connected to the sleeve assembly and seat support rods pivotally connected to the seat bracket rod and the hand pushing rod assembly respectively, and a space is arranged in the middle of the seat bracket assembly; the front carriage leg assembly comprises a front carriage leg rod pivotally connected to the sleeve assembly, a front wheel mounted on the front carriage leg rod, and front carriage leg support rods pivotally connected to the front carriage leg rod and the hand pushing rod assembly respectively, and the front carriage leg assembly corresponds to the space; the rear carriage leg assembly comprises a rear carriage leg rod pivotally connected to the bottom of the hand pushing rod assembly, a rear wheel mounted on the rear carriage leg rod, and rear carriage leg support rods pivotally connected to the sleeve assembly and the rear carriage leg rod respectively.

Description

Technical Field

[0001] This invention belongs to the field of children's vehicle technology, and specifically relates to a children's vehicle that can be folded in conjunction with other components. Background Technology

[0002] Strollers are a common means of transportation for infants and toddlers. They generally include a frame and a seat. To facilitate storage and transportation, they are often designed to be foldable. Therefore, in the existing technology, the frame usually includes a push rod assembly, a front leg assembly, and a rear leg assembly. In order to achieve the folding of the frame, a hinge turntable is usually provided at the joint of the push rod assembly, the front leg assembly, and the rear leg assembly.

[0003] During the folding process, the push rod assembly and the front leg assembly of the frame rotate and fold relative to the rear leg assembly on both sides. However, the components are stacked together after folding, resulting in a large thickness. Furthermore, since the push rod assembly, the front leg assembly, and the rear leg assembly themselves cannot be folded, the thickness of the stroller after folding is further increased. This makes it difficult to store and transport even a foldable stroller. Therefore, developing a stroller with a smaller folding volume 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 is smaller in size than traditional folding strollers, making it easier to store and transport.

[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 sliding sleeve assembly slidably mounted on the push rod assembly relative to it, a seat bracket assembly and a front leg assembly pivotally hinged to one side of the push rod assembly and the sliding sleeve assembly respectively, and a rear leg assembly pivotally hinged to the other side of the push rod assembly and the sliding sleeve assembly respectively. The seat bracket assembly is located above the front leg assembly. The seat bracket assembly includes: a seat bracket rod pivotally hinged to the sliding sleeve assembly, and a seat support rod pivotally hinged to both the seat bracket rod and the push rod assembly respectively. A clearance space is provided in the middle of the seat bracket assembly. The front leg assembly includes: a front leg rod pivotally hinged to the sliding sleeve assembly, a front wheel mounted on the front leg rod, and a... The front leg support rod is pivotally hinged to the front leg rod and the push rod assembly, and the front leg assembly corresponds to the position of the clearance space; the rear leg assembly includes: a rear leg rod pivotally hinged to the bottom of the push rod assembly, a rear wheel mounted on the rear leg rod, and a rear leg support rod pivotally hinged to the sliding sleeve assembly and the rear leg rod respectively; the sliding sleeve assembly slides upward to drive the seat bracket rod, the front leg rod and the rear leg support rod to adhere to the upper part of the push rod assembly, thereby driving the seat support rod, the front leg support rod and the rear leg rod to adhere to the lower part of the push rod assembly, so that the front leg assembly is accommodated in the clearance space and is offset from the seat bracket assembly, and the front wheel and the rear wheel are offset.

[0007] As a preferred embodiment of a foldable stroller, the sliding sleeve assembly includes: a sliding sleeve body fitted onto the push rod assembly, and a first locking assembly installed on the sliding sleeve body; the first locking assembly includes: a cap installed on the sliding sleeve body, a first pin disposed between the cap and the sliding sleeve body that can pass through the sliding sleeve body, and a first return spring disposed between the first pin and the cap; the sliding sleeve body has a first snap-fit ​​hole, and the push rod assembly has a second snap-fit ​​hole; the first pin passes through the first snap-fit ​​hole and extends into the second snap-fit ​​hole, locking the sliding sleeve body relative to the push rod body; after the first pin retracts into the cap along the direction of the first return spring, the sliding sleeve body unlocks relative to the push rod assembly; limiting protrusions are provided on both sides of the first pin, the limiting protrusions abut against the opening of the first snap-fit ​​hole, and the limiting protrusions are used to prevent the first pin from coming out of the first snap-fit ​​hole; the seat bracket rod, the front leg rod, and the rear leg support rod are pivotally hinged to the sliding sleeve body.

[0008] As a preferred embodiment of a foldable stroller, the push rod assembly includes: an inner sleeve rod and an outer sleeve rod sleeved on the outside of the inner sleeve rod for sliding; the bottom of the outer sleeve rod is provided with a fixed seat, and the seat support rod, the front leg support rod, and the rear leg rod are pivotally hinged to the fixed seat; a second snap-fit ​​hole is provided on the outer sleeve rod, and the bottom of the inner sleeve rod can abut against the first pin to retract the first pin into the cap, thereby unlocking the sliding sleeve body relative to the push rod assembly.

[0009] As a preferred embodiment of a foldable stroller, the push rod assembly further includes: a limiting sleeve, which is installed at the opening at the top of the outer sleeve rod and sandwiched between the outer sleeve rod and the inner sleeve rod; the limiting sleeve is provided with a limiting hook, the outer sleeve rod is provided with a limiting hole, and the limiting hook engages with the limiting hole; a limiting ring is sleeved on the outer side of the inner sleeve rod, which abuts against the limiting sleeve to prevent the inner sleeve rod from coming out of the outer sleeve rod.

[0010] As a preferred embodiment of a foldable stroller, the limiting sleeve is provided with a snap-fit ​​protrusion, the sliding sleeve body is provided with an elastic snap-fit ​​piece, the elastic snap-fit ​​piece is provided with a third snap-fit ​​hole, and the snap-fit ​​protrusion can snap into the third snap-fit ​​hole.

[0011] As a preferred embodiment of a foldable stroller, the push rod assembly further includes: a second locking assembly disposed at the opening at the bottom of the inner sleeve rod; the second locking assembly includes: a locking housing, a second pin disposed within the locking housing, a second return spring disposed between the locking housing and the second pin, and a guide rod passing through the locking housing and the second pin; a guide groove is provided along the length direction of the second pin, and the guide rod passes through the guide groove, allowing the second pin to slide along the direction of the guide groove; the inner sleeve rod has a first positioning hole, and the outer sleeve rod has a second positioning hole; after the second pin passes through the first positioning hole and the second positioning hole in sequence, the inner sleeve rod is locked relative to the outer sleeve rod; after the second pin retracts from the second positioning hole and the first positioning hole in sequence along the direction of the second return spring into the locking housing, the inner sleeve rod is unlocked relative to the outer sleeve rod.

[0012] As a preferred embodiment of a foldable stroller, the push rod assembly further includes: a handle located at the free end of the inner sleeve rod; the handle is equipped with a guide switch that can be pushed up and down, and a pull cable is located at the bottom of the guide switch; the second locking assembly further includes: a guide block located within the locking housing to guide the extension and retraction of the second pin, the guide block being connected to the guide switch via the pull cable; the guide block has a first guide slope, and the second pin has a second guide slope, the first guide slope being able to slide along the second guide slope; the guide switch drives the guide block to move upward via the pull cable, the first guide slope drives the second guide slope to slide downward, causing the second pin to retract into the locking housing, and the second return spring to be compressed; the guide switch drives the guide block to move downward via the pull cable, the first guide slope drives the second guide slope to slide upward, causing the second pin to extend out of the locking housing, and the second return spring to return to its original position.

[0013] As a preferred embodiment of a foldable stroller, the guide switch includes: a guide switch body disposed within the handlebar, a third return spring disposed between the guide switch body and the handlebar, and a switch guide button mounted on the handlebar to control the operation of the guide switch body; the switch guide button includes: a switch button and a limiting guide rod; the guide switch body includes: a guide switch housing, a third pin disposed within the guide switch housing, and a fourth return spring sandwiched between the guide switch housing and the third pin; the switch button can engage the third pin into the guide switch housing, the fourth return spring is in a compressed state, the guide switch can be unlocked relative to the handlebar, and the third return spring is in a compressed state; the fourth return spring resets, and the fourth return spring can engage the third pin into the handlebar, the guide switch can be locked relative to the handlebar, and the third return spring is in a reset state; the guide switch housing is provided with a limiting guide groove, and the limiting guide rod can slide within the limiting guide groove, limiting the downward movement range of the guide switch housing.

[0014] As a preferred embodiment of a foldable stroller, the rear wheel includes: a rear wheel body, a rear wheel mounting component for mounting the rear wheel body to the rear leg post, and a third locking component for locking and unlocking the rear wheel body relative to the rear wheel mounting component; the rear wheel mounting component is fixed to the rear leg post, the rear wheel body is provided with a rotating shaft, the rotating shaft extends sequentially into the rear wheel mounting component and the rear leg post, rotatably mounting the rear wheel to the rear leg post; the third locking component includes: a locking pedal rotatably mounted to the rear wheel mounting component, and a locking and unlocking mechanism. The locking and resetting component of the rear wheel body is installed within the rear wheel mounting component. One end of the locking and resetting component abuts against the locking pedal, and the other end abuts against the rear wheel body. The locking pedal has an abutment groove, and the rear wheel body has a positioning groove. The abutment groove allows the locking and resetting component to be inserted into the positioning groove, locking the rear wheel body. The locking pedal also has a second clearance groove, which provides reset space for the locking and resetting component, allowing it to disengage from the positioning groove and unlock the rear wheel body.

[0015] As a preferred embodiment of a foldable stroller, a quick-release plate is provided on the rear wheel mounting component, and a limiting groove is provided on the rotating shaft; when the quick-release plate disengages from the limiting groove, the rear wheel body is detachable; when the quick-release plate re-engages with the limiting groove, the rear wheel body is not detachable.

[0016] The beneficial effects of this invention are:

[0017] This invention proposes a foldable stroller that can be linked together. The seat bracket assembly is disassembled into a seat bracket rod and a seat support rod; the front leg assembly is disassembled into a front leg rod, a front wheel, and a front leg support rod; and the rear leg assembly is disassembled into a rear leg rod, a rear wheel, and a rear leg support rod. Above the front leg assembly, the seat bracket assembly has a clearance space in the middle. The front leg assembly corresponds to the clearance space. A sliding sleeve assembly slides upward, driving the seat bracket rod, front leg rod, and rear leg support rod on both sides of the push rod assembly to adhere to the upper part of the push rod assembly. This, in turn, causes the seat support rod, front leg support rod, and rear leg rod on both sides of the push rod assembly to adhere to the lower part of the push rod assembly. This design allows the front leg assembly to be housed in a space that is offset from the seat bracket assembly, and the front wheels to be offset from the rear wheels. By adopting this solution, the seat bracket assembly and the front leg assembly can be offset from each other relative to the push rod assembly when folded, as can the rear leg assembly and the seat bracket assembly with respect to the front leg assembly, and the front wheels and rear wheels. This reduces the thickness of the foldable stroller after folding. Furthermore, separating the seat bracket assembly, front leg assembly, and rear leg assembly and folding them separately in different positions on the push rod assembly further reduces the thickness of the foldable stroller after folding, making the foldable stroller easier to store and transport, and improving the user experience. 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 structure of the foldable stroller provided by the present invention in its normal state.

[0020] Figure 2 This is a structural diagram of the folding process of the foldable stroller provided by the present invention;

[0021] Figure 3 This is a schematic diagram of the folded structure of the foldable stroller provided by the present invention.

[0022] Figure 4 yes Figure 1 The cross-sectional view shown is of the foldable stroller in its normal state.

[0023] Figure 5 yes Figure 4 The enlarged section view at point A of the foldable stroller in its normal state.

[0024] Figure 6 yes Figure 4 The enlarged section view at point B of the cross-sectional view of the foldable stroller in its normal state.

[0025] Figure 7 yes Figure 4 The enlarged section view at point C of the cross-sectional view of the foldable stroller in its normal state.

[0026] Figure 8 yes Figure 1 The diagram shows an explosion of a foldable stroller in its normal state.

[0027] Figure 9 yes Figure 8 A schematic diagram of the push rod assembly of the foldable stroller shown;

[0028] Figure 10 yes Figure 9 An exploded view of the push rod assembly of the foldable stroller shown.

[0029] Figure 11 yes Figure 9 A magnified view of point A on the push rod assembly of the foldable stroller shown;

[0030] Figure 12 yes Figure 9 A magnified view of part B of the push rod assembly of the foldable stroller shown;

[0031] Figure 13 yes Figure 9 A magnified view of point C on the push rod assembly of the foldable stroller shown;

[0032] Figure 14 yes Figure 8 The diagram shows the structure of the sliding sleeve assembly of the foldable stroller.

[0033] Figure 15 yes Figure 14 An exploded view of the sliding assembly of the foldable stroller shown.

[0034] Figure 16 yes Figure 8 The diagram shows the structure of the rear leg assembly of the foldable stroller.

[0035] Figure 17 yes Figure 16 The diagram shows a partial exploded view of the rear leg assembly of the foldable stroller.

[0036] Figure 18 yes Figure 17The diagram shows the locking pedal structure of the rear leg assembly of the foldable stroller. Detailed Implementation

[0037] 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.

[0038] In the description of this invention, the term "a plurality of" refers to two or more unless otherwise expressly defined. The term "and / or" as used herein includes all combinations of one or more of the associated listed items, both forwards and backwards. The terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can also be a direct connection or an indirect connection via a medium. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to the specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] Strollers are a common means of transportation for infants and toddlers. They generally include a frame and a seat. To facilitate storage and transportation, they are often designed to be foldable. Therefore, in the existing technology, the frame usually includes a push rod assembly, a front leg assembly, and a rear leg assembly. In order to achieve the folding of the frame, a hinge turntable is usually provided at the joint of the push rod assembly, the front leg assembly, and the rear leg assembly.

[0041] During the folding process, the push rod assembly and the front leg assembly of the frame rotate and fold relative to the rear leg assembly on both sides. However, the components are stacked together after folding, resulting in a large thickness. Furthermore, since the push rod assembly, the front leg assembly, and the rear leg assembly themselves cannot be folded, the thickness of the stroller after folding is further increased. This makes it difficult to store and transport even a foldable stroller. Therefore, developing a stroller with a smaller folding volume has become an urgent problem for those skilled in the art.

[0042] In this invention, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, this embodiment of the invention provides a foldable stroller, which includes: a push rod assembly 10, a sliding sleeve assembly 20 sleeved on the push rod assembly 10 and slidably relative to it, a seat bracket assembly 30 and a front leg assembly 40 pivotally hinged to one side of the push rod assembly 10 and the sliding sleeve assembly 20 respectively, and a rear leg assembly 50 pivotally hinged to the other side of the push rod assembly and the sliding sleeve assembly 20 respectively, wherein the seat bracket assembly 30 is located above the front leg assembly 40;

[0043] The seat bracket assembly 30 includes: a seat bracket rod 31 pivotally hinged to the sliding sleeve assembly 20, and a seat support rod 32 pivotally hinged to the seat bracket rod 31 and the push rod assembly 10 respectively. The seat bracket assembly 30 has a clearance space 100 in the middle.

[0044] The front leg assembly 40 includes: a front leg rod 41 pivotally hinged to the sliding sleeve assembly 20, a front wheel 42 mounted on the front leg rod 41, and a front leg support rod 43 pivotally hinged to the front leg rod 41 and the push rod assembly 10 respectively. The front leg assembly 40 corresponds to the position of the clearance space 100.

[0045] The rear leg assembly 50 includes: a rear leg rod 51 pivotally hinged to the bottom of the push rod assembly 10, a rear wheel 52 mounted on the rear leg rod 51, and a rear leg support rod 53 pivotally hinged to the sliding sleeve assembly 20 and the rear leg rod 51 respectively.

[0046] After the sliding sleeve assembly 20 slides upward, it drives the seat bracket rod 31, the front leg rod 41, and the rear leg support rod 53 to adhere to the upper part of the push rod assembly 10, thereby causing the seat support rod 32, the front leg support rod 43, and the rear leg rod 51 to adhere to the lower part of the push rod assembly 10. This results in the front leg assembly 40 being accommodated in the clearance space 100 and offset from the seat bracket assembly 30, as well as the front wheel 42 and the rear wheel 52 being offset.

[0047] In this invention, by adopting the above-mentioned solution, after the seat bracket assembly 30 and the front leg assembly 40 are folded relative to the push rod assembly 10, the seat bracket assembly 30 and the front leg assembly 40 can be staggered from each other, the rear leg assembly 50 and the seat bracket assembly 30 can be staggered from the front leg assembly 40, and the front wheel 42 and the rear wheel 52 can be staggered to reduce the thickness of the foldable stroller after folding. Moreover, by separating the seat bracket assembly 30, the front leg assembly 40 and the rear leg assembly 50 and folding them separately at different positions on the push rod assembly 10, the thickness of the foldable stroller after folding is further reduced, making the foldable stroller easier to store and transport, and improving the user experience.

[0048] like Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15 As shown, in order to enable the sliding sleeve assembly 20 to be locked and unlocked relative to the push rod assembly 10, the sliding sleeve assembly 20 includes: a sliding sleeve body 21 sleeved on the push rod assembly 10, and a first locking component 22 installed on the sliding sleeve body 21;

[0049] The first locking component 22 includes: a cap 221 installed on the sliding body 21, a first pin 222 disposed between the cap 221 and the sliding body 21 and capable of passing through the sliding body 21, and a first return spring 223 disposed between the first pin 222 and the cap 221;

[0050] Specifically, the sliding sleeve body 21 is provided with a first locking hole 211, and the push rod assembly 10 is provided with a second locking hole 11. During the locking process, the first pin 222 passes through the first locking hole 211 and extends into the second locking hole 11, and the sliding sleeve body 21 is locked relative to the push rod assembly 10. At this time, the sliding sleeve body 21 cannot slide relative to the push rod assembly 10.

[0051] During the unlocking process, after the external force retracts the first pin 222 into the cap 221 along the direction of the first return spring 223, the sliding sleeve body 21 is unlocked relative to the push rod assembly 10. At this time, the sliding sleeve body 21 can slide relative to the push rod assembly 10.

[0052] To prevent the first pin 222 from coming out of the first latching hole 211, limiting protrusions 2221 are provided on both sides of the first pin 222 at positions corresponding to the first latching hole 211. The limiting protrusions 2221 abut against the opening of the first latching hole 211 and are used to prevent the first pin 222 from coming out of the first latching hole 211.

[0053] In order to pivotally hinge the seat bracket rod 31, the front leg rod 41 and the rear leg support rod 53 to the sliding sleeve assembly 20, the seat bracket rod 31, the front leg rod 41 and the rear leg support rod 53 are pivotally hinged to the sliding sleeve body 21, so that they fit against the push rod assembly 10 after folding.

[0054] In order to enable the push rod assembly 10 to extend and retract, and to unlock the first locking component 22 during the extension and retraction process, the push rod assembly 10 includes: an inner sleeve rod 12, and an outer sleeve rod 13 sleeved on the outside of the inner sleeve rod 12 for the inner sleeve rod 12 to slide.

[0055] The second snap-fit ​​hole 11 is provided on the outer sleeve rod 13. During the sliding process, the bottom of the inner sleeve rod 12 can abut against the first pin 222 and retract the first pin 222 into the cap 221, so that the sliding sleeve body 21 is unlocked relative to the push rod assembly 10.

[0056] In order for the seat support rod 32, the front leg support rod 43 and the rear leg rod 51 to be pivotally hinged to the push rod assembly 10, the bottom of the outer sleeve rod 13 is provided with a fixed seat 131. The seat support rod 32, the front leg support rod 43 and the rear leg rod 51 are pivotally hinged to the fixed seat 131, so that the seat support rod 32, the front leg support rod 43 and the rear leg rod 51 can rotate relative to the outer sleeve rod 13.

[0057] To prevent the inner sleeve rod 12 from dislodging from the outer sleeve rod 13, the push rod assembly 10 further includes a limiting sleeve 14, which is installed at the opening at the top of the outer sleeve rod 13 and is sandwiched between the outer sleeve rod 13 and the inner sleeve rod 12.

[0058] The limiting sleeve 14 is provided with a limiting hook 141, and the outer sleeve rod 13 is provided with a limiting hole 132 at the position corresponding to the limiting hook 141. The limiting hook 141 engages with the limiting hole 132, thereby installing the limiting sleeve 14 at the opening at the top of the outer sleeve rod 13.

[0059] A limiting ring 121 is provided on the outer side of the inner sleeve rod 12. During the sliding process of the inner sleeve rod 12 relative to the outer sleeve rod 13, the limiting ring 121 can abut against the limiting sleeve 14, thereby preventing the inner sleeve rod 12 from coming out of the outer sleeve rod 13.

[0060] In order to lock the foldable stroller after folding, the limiting sleeve 14 is provided with a snap-fit ​​protrusion 142, and the sliding sleeve body 21 is provided with an elastic snap-fit ​​piece 212 at the position corresponding to the snap-fit ​​protrusion 142. The elastic snap-fit ​​piece 212 is provided with a third snap-fit ​​hole 2121 corresponding to the snap-fit ​​protrusion 142. The snap-fit ​​protrusion 142 can snap into the third snap-fit ​​hole 2121, thereby locking the sliding sleeve body 21 relative to the limiting sleeve 14.

[0061] In order to enable the push rod assembly 10 to be locked and unlocked during the extension and retraction process, the push rod assembly 10 further includes: a second locking assembly 15, which is disposed at the opening at the bottom of the inner sleeve rod 12;

[0062] The second locking assembly 15 includes: a locking housing 151, a second pin 152 disposed within the locking housing 151, a second return spring 153 disposed between the locking housing 151 and the second pin 152, and a guide rod 154 passing through the locking housing 151 and the second pin 152;

[0063] A guide groove 1521 is provided along the length direction of the second pin 152, and the guide rod 154 passes through the guide groove 1521, so that the second pin 152 can slide along the direction of the guide groove 1521;

[0064] The inner sleeve rod 12 is provided with a first positioning hole 122, and the outer sleeve rod 13 is provided with a second positioning hole 133. During the locking process, after the second pin 152 passes through the first positioning hole 122 and the second positioning hole 133 in sequence, the inner sleeve rod 12 is locked relative to the outer sleeve rod 13.

[0065] During the unlocking process, the second pin 152 retracts into the locking housing 151 from the second positioning hole 133 and the first positioning hole 122 in sequence along the direction of the second return spring 153 through the cooperation of the guide rod 153 and the guide groove 1521, and then the inner sleeve rod 12 unlocks relative to the outer sleeve rod 13.

[0066] In order to enable the push rod assembly 10 to lock and unlock during the extension and retraction process, the push rod assembly 10 further includes: a handle 16 provided at the free end of the inner sleeve rod 12;

[0067] The handle 16 is provided with a guide switch 161 that can be pushed up and down, and a pull cable 162 is provided at the bottom of the guide switch 161. The second locking assembly 15 also includes a guide block 155 disposed in the locking housing 151 to guide the extension and retraction of the second pin 152. The guide block 155 is connected to the guide switch 161 through the pull cable 162.

[0068] The guide block 155 is provided with a first guide slope 1551, and the second pin 152 is provided with a second guide slope 1522. The first guide slope 1551 can slide along the second guide slope 1522.

[0069] During the unlocking process, the guide switch 161 drives the guide block 155 to move upward through the pull cable 162, and the first guide slope 1551 drives the second guide slope 1522 to slide downward, so that the second pin 152 retracts into the locking housing 151 and the second return spring 153 is compressed.

[0070] During the locking process, the guide switch 161 drives the guide block 155 to move downward through the pull cable 162, and the first guide slope 1551 drives the second guide slope 1522 to slide upward, so that the second pin 152 extends out of the locking housing 151, and the second return spring 153 returns to its original position.

[0071] In order to limit the locking and unlocking of the guide switch 161, the guide switch 161 includes: a guide switch body 1611 disposed in the handle, a third return spring 1612 disposed between the guide switch body 1611 and the handle 16, and a switch guide key 1613 installed on the handle 16 to control the switching of the guide switch body 1611.

[0072] The switch guide key 1613 includes: a switch button 16131 and a limiting guide rod 116132;

[0073] The guide switch body 1611 includes: a guide switch housing 16111, a third pin 16112 disposed in the guide switch housing 16111, and a fourth return spring 16113 sandwiched between the guide switch housing 16111 and the third pin 16112;

[0074] During the unlocking process of the guide switch 161, the switch button 16131 can abut the third pin 16112 into the guide switch housing 16111, the fourth return spring 16113 is in a compressed state, the guide switch 161 can be unlocked relative to the handle 16, and the third return spring 1612 is in a compressed state.

[0075] During the locking process of the guide switch 161, the fourth return spring 16113 is reset, and the fourth return spring 16113 can engage the third pin 16112 into the handle 16. The guide switch 161 can be locked relative to the handle 16, and the third return spring 1612 is in the reset state.

[0076] During the locking and unlocking process, the guide switch housing 16111 is provided with a limiting guide groove 16114, and the limiting guide rod 16132 can slide within the limiting guide groove 16114, thus limiting the range of downward movement of the guide switch housing 16111.

[0077] like Figure 16 , Figure 17 and Figure 18 As shown, in order to assemble, lock and unlock the rear wheel, the rear wheel 52 includes: a rear wheel body 521, a rear wheel mounting member 522 for mounting the rear wheel body 521 to the rear leg bar 51, and a third locking component 523 for locking and unlocking the rear wheel body 521 relative to the rear wheel mounting member 522.

[0078] The rear wheel mounting component 522 is fixed to the rear leg rod 51. The rear wheel body 521 is provided with a rotating shaft 5211. The rotating shaft 5211 extends into the rear wheel mounting component 522 and the rear leg rod 51 in sequence, so that the rear wheel 52 is rotatably mounted on the rear leg rod 51.

[0079] The third locking component 523 includes: a locking pedal 5231 rotatably mounted on the rear wheel mounting component 522, and a locking and unlocking component 5232 capable of locking and unlocking the rear wheel body 521. After the locking and unlocking component 5232 is installed in the rear wheel mounting component 522, one end of the locking and unlocking component 5232 abuts against the locking pedal 5231, and the other end of the locking and unlocking component 5232 abuts against the rear wheel body 521.

[0080] During the locking process of the rear wheel 52, the locking pedal 5231 is provided with an abutment groove 52311, and the rear wheel body 521 is provided with a positioning groove 5212. The abutment groove 52311 can abut the locking reset member 5232 into the positioning groove 5212 to lock the rear wheel body 521.

[0081] During the process of unlocking the rear wheel 52, the locking pedal 5231 is provided with a second clearance groove 52312. The second clearance groove 52312 provides a reset space for the locking reset member 5232, so that the locking reset member 5232 can be disengaged from the positioning groove 5212 and the rear wheel body 521 can be unlocked.

[0082] To enable quick release of the rear wheel 52, a reset quick-release plate 5221 is provided on the rear wheel mounting component 522, and a limiting groove 5211 is provided on the rotating shaft 5211; when the reset quick-release plate 5221 disengages from the limiting groove 52111, the rear wheel body 521 is detachable; when the reset quick-release plate 5221 resets and engages with the limiting groove 52111, the rear wheel body 521 is not detachable.

[0083] 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 vehicle includes a push rod assembly, a sliding sleeve assembly slidably fitted onto the push rod assembly, a seat bracket assembly and a front leg assembly pivotally hinged to one side of the push rod assembly and the sliding sleeve assembly respectively, and a rear leg assembly pivotally hinged to the other side of the push rod assembly and the sliding sleeve assembly respectively, wherein the seat bracket assembly is located above the front leg assembly. The seat bracket assembly includes: a seat bracket rod pivotally hinged to the sliding sleeve assembly, and a seat support rod pivotally hinged to the seat bracket rod and the push rod assembly respectively, and the seat bracket assembly has a clearance space in the middle. The front leg assembly includes: a front leg rod pivotally hinged to the sliding sleeve assembly, a front wheel mounted on the front leg rod, and a front leg support rod pivotally hinged to the front leg rod and the push rod assembly respectively, with the front leg assembly corresponding to the position of the clearance space; The rear leg assembly includes: a rear leg rod pivotally hinged to the bottom of the push rod assembly, a rear wheel mounted on the rear leg rod, and a rear leg support rod pivotally hinged to the sliding sleeve assembly and the rear leg rod respectively. The sliding sleeve assembly slides upward to drive the seat bracket rod, the front leg rod, and the rear leg support rod to adhere to the upper part of the push rod assembly, thereby causing the seat support rod, the front leg support rod, and the rear leg rod to adhere to the lower part of the push rod assembly. This allows the front leg assembly to be accommodated in the clearance space and offset from the seat bracket assembly, as well as the front wheel and the rear wheel to be offset.

2. The foldable stroller as described in claim 1, characterized in that, The sliding sleeve assembly includes: a sliding sleeve body sleeved on the push rod assembly, and a first locking component installed on the sliding sleeve body; The first locking component includes: a cap installed on the slide body, a first pin disposed between the cap and the slide body and capable of passing through the slide body, and a first return spring disposed between the first pin and the cap; The sliding sleeve body is provided with a first locking hole, and the push rod assembly is provided with a second locking hole. The first pin passes through the first locking hole and extends into the second locking hole, and the sliding sleeve body is locked relative to the push rod assembly. After the first pin retracts into the cap along the direction of the first reset spring, the sliding sleeve body is unlocked relative to the push rod assembly; The first pin has limiting protrusions on both sides, and the limiting protrusions abut against the opening of the first snap-fit ​​hole. The limiting protrusions are used to prevent the first pin from coming out of the first snap-fit ​​hole. The seat bracket rod, the front leg rod, and the rear leg support rod are pivotally hinged to the sliding sleeve body.

3. The foldable stroller as described in claim 2, characterized in that, The push rod assembly includes: an inner sleeve rod, and an outer sleeve rod sleeved on the outside of the inner sleeve rod for sliding of the inner sleeve rod; The bottom of the outer sleeve rod is provided with a fixed seat, and the seat support rod, the front leg support rod and the rear leg rod are respectively pivotally hinged to the fixed seat; The second snap-fit ​​hole is provided on the outer sleeve rod, and the bottom of the inner sleeve rod can abut against the first pin to retract the first pin into the cap, so that the sliding sleeve body is unlocked relative to the push rod assembly.

4. The foldable stroller as described in claim 3, characterized in that, The push rod assembly further includes: a limiting sleeve, which is installed at the opening at the top of the outer sleeve rod and is sandwiched between the outer sleeve rod and the inner sleeve rod; The limiting sleeve is provided with a limiting hook, the outer sleeve rod is provided in the limiting hole, and the limiting hook is engaged with the limiting hole; A limiting ring is fitted on the outer side of the inner sleeve rod, and the limiting ring can abut against the limiting sleeve to prevent the inner sleeve rod from coming out of the outer sleeve rod.

5. The foldable stroller as described in claim 4, characterized in that, The limiting sleeve is provided with a snap-fit ​​protrusion, the sliding sleeve body is provided with an elastic snap-fit ​​piece, the elastic snap-fit ​​piece is provided with a third snap-fit ​​hole, and the snap-fit ​​protrusion can snap into the third snap-fit ​​hole.

6. The foldable stroller as described in claim 3, characterized in that, The push rod assembly further includes: a second locking component, which is disposed at the opening at the bottom of the inner sleeve rod; The second locking assembly includes: a locking housing, a second pin disposed within the locking housing, a second return spring disposed between the locking housing and the second pin, and a guide rod passing through the locking housing and the second pin; A guide groove is provided along the length direction of the second pin, and the guide rod passes through the guide groove, so that the second pin can slide along the direction of the guide groove; The inner sleeve rod is provided with a first positioning hole, and the outer sleeve rod is provided with a second positioning hole. After the second pin passes through the first positioning hole and the second positioning hole in sequence, the inner sleeve rod is locked relative to the outer sleeve rod. After the second pin retracts sequentially from the second positioning hole and the first positioning hole into the locking housing along the direction of the second reset spring, the inner sleeve rod is unlocked relative to the outer sleeve rod.

7. The foldable stroller as described in claim 6, characterized in that, The push rod assembly further includes: a handle located at the free end of the inner sleeve rod; The handle is provided with a guide switch that can be pushed up and down, and a pull cable is provided at the bottom of the guide switch. The second locking component also includes a guide block disposed in the housing of the locking component to guide the extension and retraction of the second pin. The guide block is connected to the guide switch through the pull cable. The guide block is provided with a first guide slope, and the second pin is provided with a second guide slope. The first guide slope can slide along the second guide slope. The guide switch drives the guide block to move upward via the pull cable, and the first guide slope drives the second guide slope to slide downward, so that the second pin retracts into the locking housing and the second reset spring is compressed. The guide switch drives the guide block to move downward via the pull cable, and the first guide slope drives the second guide slope to slide upward, so that the second pin extends out of the locking housing, and the second reset spring resets.

8. The foldable stroller as described in claim 7, characterized in that, The guide switch includes: a guide switch body disposed in the handlebar, a third return spring disposed between the guide switch body and the handlebar, and a switch guide key mounted on the handlebar to control the switch body's opening and closing; The switch guide key includes: a switch button and a limit guide rod; The guide switch body includes: a guide switch housing, a third pin disposed within the guide switch housing, and a fourth return spring sandwiched between the guide switch housing and the third pin; The switch button can engage the third pin into the guide switch housing, the fourth return spring is in a compressed state, the guide switch can be unlocked relative to the handle, and the third return spring is in a compressed state. The fourth reset spring is reset, and the fourth reset spring can engage the third pin into the handlebar. The guide switch can be locked relative to the handlebar, and the third reset spring is in the reset state. The guide switch housing is provided with a limiting guide groove, and the limiting guide rod can slide within the limiting guide groove, thus limiting the downward movement range of the guide switch housing.

9. The foldable stroller as described in claim 1, characterized in that, The rear wheel includes: a rear wheel body, a rear wheel mounting component for mounting the rear wheel body to the rear leg, and a third locking component for locking and unlocking the rear wheel body relative to the rear wheel mounting component; The rear wheel mounting component is fixed to the rear leg bar. The rear wheel body is provided with a rotating shaft. The rotating shaft extends into the rear wheel mounting component and the rear leg bar in sequence, so that the rear wheel can be rotatably mounted on the rear leg bar. The third locking component includes: a locking pedal rotatably mounted on the rear wheel mounting component, and a locking and unlocking component for locking and unlocking the rear wheel body. After the locking and unlocking component is installed in the rear wheel mounting component, one end of the locking and unlocking component abuts against the locking pedal, and the other end of the locking and unlocking component abuts against the rear wheel body. The locking pedal is provided with an abutment groove, and the rear wheel body is provided with a positioning groove. The abutment groove can abut the locking and resetting member into the positioning groove to lock the rear wheel body. The locking pedal is provided with a second clearance groove, which provides a reset space for the locking reset member, so that the locking reset member can be disengaged from the positioning groove and the rear wheel body can be unlocked.

10. The foldable stroller as described in claim 9, characterized in that, The rear wheel mounting component is also provided with a quick-release reset plate, and the rotating shaft is provided with a limiting groove; The quick-release plate disengages from the limiting groove, and the rear wheel body becomes detachable. The reset quick-release plate is engaged with the limiting groove, and the rear wheel body is not detachable.

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