CN216684561U - Foldable stroller - Google Patents

Abstract

The utility model discloses a foldable stroller, which comprises a frame with an unfolding position and a folding position, and a locking mechanism for locking the frame at the unfolding position, wherein the frame comprises a front support assembly provided with a front wheel assembly, a rear support assembly provided with a rear wheel assembly, a push rod assembly, a first guide groove for accommodating and sliding a connecting rod, a track groove, a guide pin and a connecting rod, the lower end of the push rod assembly is rotatably connected with the upper end of the rear support assembly, the upper end of the front support assembly is rotatably connected with the front upper side of the rear support assembly, the frame also comprises the connecting rod, the rear support assembly is provided with the first guide groove for accommodating and sliding the connecting rod, the push rod assembly is provided with the track groove, one end of the connecting rod is in sliding fit with the track groove through the guide pin, and the other end of the connecting rod is in sliding fit with the front support assembly through the connecting pin; the folding linkage structure is formed at the rotary joint, the whole frame structure is very simple, and the problem of inconvenient folding operation caused by excessive rod pieces is avoided.

Description

Foldable stroller

Technical Field

The utility model relates to a foldable stroller.

Background

In the prior art, the stroller is usually foldable for convenient carrying and storage. However, most of the existing trolleys are complex in structure, more rod pieces are provided, the folding operation is inconvenient, and meanwhile, the folded trolley is large in size and not convenient to carry and store.

Disclosure of Invention

The utility model aims to: the foldable baby stroller has a simple frame structure and is convenient to fold and store.

The technical scheme of the utility model is as follows: a foldable stroller comprises a frame with an unfolding position and a folding position, and a locking mechanism for locking the frame at the unfolding position, wherein the frame comprises a front support assembly provided with a front wheel assembly, a rear support assembly provided with a rear wheel assembly, a push rod assembly, a first guide groove for accommodating and sliding the connecting rod, a track groove, a guide pin and a connecting rod, the lower end of the push rod assembly is rotatably connected with the upper end of the rear support assembly, the upper end of the front support assembly is rotatably connected with the front upper side of the rear support assembly, the frame further comprises the connecting rod, the rear support assembly is provided with the first guide groove for accommodating and sliding the connecting rod, one end of the connecting rod is in sliding fit with the track groove, and the other end of the connecting rod is in sliding fit with the front support assembly through the connecting pin;

in the folding process, when the push rod subassembly overturns downwards and the relative rear bracket subassembly draws in, uide pin and orbit groove sliding fit drive the connecting rod and slide in first guide way, and the connecting rod drives the preceding bracket subassembly through the connecting pin and rotates backward and draw in relative rear bracket subassembly, and then realizes that the whole car draws in.

Furthermore, the locking mechanism comprises a first locking mechanism for locking the push rod assembly and the rear support assembly when the frame is in the unfolding position, and a second locking mechanism for realizing limiting locking of the front support assembly and the rear support assembly when the frame is in the unfolding position, the second locking mechanism and the first locking mechanism are in a linkage type locking structure, and the first locking mechanism drives the second locking mechanism to perform locking movement while performing locking movement, so that the first locking mechanism and the second locking mechanism are locked simultaneously.

Furthermore, the first locking mechanism comprises a transverse connecting pipe positioned at the upper part of the rear support component, a mounting seat arranged at the middle position in the transverse connecting pipe, a sliding rod which is arranged in the transverse connecting pipe in a penetrating manner and arranged at two sides of the mounting seat, and an unlocking handle which is coated outside the transverse connecting pipe and can rotate relative to the transverse connecting pipe, a first resetting piece is arranged between the sliding rod and the mounting seat, a convex pin is arranged at the inner end of the sliding rod, a second guide groove which is in transverse sliding fit with the convex pin is arranged on the transverse connecting pipe, and a guide chute which is in sliding fit with the inclined surface of the convex pin is arranged on the unlocking handle; a lock tongue is formed at the outer end of the sliding rod, and a lock groove for locking the lock tongue is formed at the lower part of the push rod assembly;

when the frame is in an unfolded state, the sliding rod transversely moves outwards under the reset action of the first reset piece, and the lock tongue is inserted into the corresponding lock groove to lock the push rod assembly;

when the first locking mechanism needs to be unlocked, the unlocking handle is rotated, the guide chute is in sliding fit with the inclined surface of the convex pin, the slide rod is driven to move inwards, and therefore the lock tongue is withdrawn from the lock groove, and unlocking is achieved.

Furthermore, the first locking mechanism further comprises two locks, the two locks penetrate through the limiting groove of the unlocking handle and the penetrating groove of the transverse connecting pipe to be inserted into the mounting groove of the mounting seat, and a second reset piece is arranged between the two locks and the mounting seat;

when the frame is in an unfolded state, the two locks abut against one end of the limiting groove of the unlocking handle, and the unlocking handle cannot rotate towards the unlocking direction;

when the first locking mechanism needs to be unlocked, the first locking mechanism is moved inwards to exit from the limiting groove of the unlocking handle by pressing the two locks, and the unlocking handle can rotate towards the unlocking direction.

Furthermore, the unlocking handle comprises an inner sleeve and a handle seat which is coated outside the inner sleeve and is relatively fixed with the inner sleeve, the guide chute and the limiting groove are formed on the inner sleeve, an operating handle is formed on the handle seat, a button groove is arranged at a position corresponding to the two locks, and an operating button capable of moving inside and outside is arranged at the button groove;

when the frame is in an unfolded state, the operation button is pressed, so that the two locks can be driven to move inwards to release the limit of the unlocking handle.

Furthermore, the second locking mechanism comprises a lock block and a third reset piece, wherein one side of the lock block is in pin joint with the rear support assembly and can be turned, the third reset piece is arranged between the lock block and the rear support assembly, an upper step corresponding to the lock block and a lower step formed below the upper step are formed at the connecting part of the front support assembly, a limiting convex part corresponding to the lower step is formed at the connecting part of the rear support assembly, the third reset piece always presses the lock block to the direction of separating from the upper step, a step surface is formed at the outer end of the slide rod between the lock tongue and the slide rod, and the step surface is arranged corresponding to the lock block;

first locking mechanism is when the locking motion, and the spring bolt of its slide bar is inserted to the locked groove that corresponds, and its step face drives the locking piece upset makes its card go into the upper step of fore-stock subassembly stops the folding rotation of fore-stock subassembly, simultaneously the spacing protruding portion card of establishing of rear-stock subassembly is established the lower step department of fore-stock subassembly prevents fore-stock subassembly expandes the head to realize locking when first locking mechanism and second locking mechanism.

Furthermore, the connecting part of the rear support component comprises an inner connecting seat and an outer connecting seat which can be locked in a buckling manner, and the connecting part of the push rod component, the connecting part of the front support component and the connecting rod are assembled between the corresponding inner connecting seat and the corresponding outer connecting seat.

Furthermore, the connecting rods are symmetrically arranged on two sides of the connecting part of the push rod assembly and the connecting part of the front support assembly, and the inner connecting seat and the outer connecting seat are respectively provided with a first guide groove.

Furthermore, the lower end of the connecting rod is provided with a lower slotted hole, the upper end of the front support assembly is provided with a first slotted hole corresponding to the lower slotted hole, any one of the lower slotted hole and the first slotted hole is a round hole, the other one of the lower slotted hole and the first slotted hole is an oblong hole, and the lower slotted hole and the first slotted hole are in sliding fit through a connecting pin. The middle part of the guide pin penetrates through the track groove, two ends of the guide pin are respectively assembled and connected with the two connecting rods, the middle part of the connecting pin penetrates through the first groove hole, and two ends of the connecting pin are respectively assembled in the lower groove holes of the two connecting rods.

Furthermore, the transverse connecting pipe is arranged between the inner connecting seats at two sides of the rear bracket component, and the inner connecting seats are communicated with the transverse connecting pipe and can be used for the outer end of the sliding rod to extend into; the locking piece rotates to be set up on the interior connecting seat, the third piece that resets sets up the locking piece with between the outer connecting seat, and will the locking piece is pressed to slide bar one side.

Furthermore, the inner side of the inner connecting seat is provided with a plug-in part for the child seat pocket to be plugged in.

The utility model has the advantages that:

1. the folding linkage structure is formed at the rotating joint through the mounting connection relationship among the front support component, the rear support component, the push rod component and the connecting rod, the whole frame structure is very simple, and the problem of inconvenient folding operation caused by excessive rod pieces is solved.

2. According to the utility model, the push rod assembly is locked by the first locking mechanism when the frame is in the unfolding position, the front support assembly is limited and locked by the second locking mechanism when the frame is in the unfolding position, and the second locking mechanism and the first locking mechanism are in a linkage type locking structure; when the frame is unfolded in place, the sliding rod of the first locking mechanism moves outwards under the reset action, so that the lock tongue of the sliding rod automatically locks the corresponding lock groove, and the push rod assembly is locked; meanwhile, the slide bar drives the locking block to turn over, so that the locking block is clamped into an upper step of the front support assembly to prevent the front support assembly from being folded and rotated, and at the moment, the limiting convex part of the rear support assembly is clamped at a lower step of the front support assembly to prevent the front support assembly from being unfolded too far, so that the locking of a second locking mechanism is synchronously realized; the utility model has novel and simple structural design, saves a linkage part between the first locking mechanism and the second locking mechanism, and greatly reduces the volume of the whole vehicle and the assembly difficulty.

3. According to the utility model, the first locking mechanism is provided with the second lock, and when the frame is in an unfolded state, the second lock can block the unlocking handle, so that the unlocking handle cannot rotate towards the unlocking direction, namely the first locking mechanism cannot be unlocked; when the first locking mechanism needs to be unlocked, the second lock is pressed first, and the unlocking handle can be rotated towards the unlocking direction only by releasing the blocking of the unlocking handle; the design can greatly improve the safety of locking, and avoid accidental unlocking caused by misoperation or touch.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention in an expanded state;

FIG. 2 is a schematic side view of the present invention in its expanded configuration;

FIG. 3 is a schematic view of the structure of FIG. 2 in the process of being folded;

FIG. 4 is a schematic structural view of FIG. 2 in a folded state;

FIG. 5 is a schematic view of the assembly structure at A in FIG. 1;

FIG. 6 is an enlarged view of a portion of FIG. 5;

FIG. 7 is a schematic view of the assembled structure of FIG. 5 at another angle;

FIG. 8 is a schematic view of the assembly structure at B in FIG. 1;

fig. 9 is a partially assembled structural view of fig. 8 at another angle.

Wherein: 1, a front support component; 1-1 a first slot;

2, a rear support component; 2-1 a first guide groove; 2-2 internal connection seat; 2-3 external connecting seats;

3 a push rod assembly; 3-1 track groove;

4, a front wheel assembly;

5, a rear wheel assembly;

6, connecting rods; 6-1 lower slotted hole;

7 a guide pin;

8 connecting pins;

9 a first locking mechanism; 9-1 transverse connecting pipe; 9-2 mounting seats; 9-3 slide bar; 9-4 unlocking the handle; 9-5 a first restoring member; 9-6 convex pins; 9-7 second guide grooves; 9-8 guide chutes; 9-9 bolts; 9-10 locking grooves; 9-11 two locks; 9-12 limiting grooves; 9-13 perforation slots; 9-14 mounting grooves; 9-15 second restoring elements; 9-16 inner sleeves; 9-17 handle seats; 9-18 operating handles; 9-19 button slots; 9-20 operating buttons;

10 a second locking mechanism; 10-1 locking block; 10-2 a third restoring member; 10-3, upper steps; 10-4, descending a step; 10-5 limiting convex part; 10-6 step surfaces;

11 a plug part.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present invention. The conditions used in the examples may be further adjusted according to specific conditions, and the conditions used in the experiments are not specifically mentioned.

As shown in fig. 1 to 9, a foldable stroller includes a frame having an unfolded position and a folded position, and a locking mechanism for locking the frame in the unfolded position, the frame comprises a front support assembly 1 provided with a front wheel assembly 4, a rear support assembly 2 provided with a rear wheel assembly 5 and a push rod assembly 3, the lower end of the push rod component 3 is rotationally connected with the upper end of the rear bracket component 2, the upper end of the front bracket component 1 is rotationally connected with the front upper side of the rear bracket component 2, the frame also comprises a connecting rod 6, the rear bracket component 2 is provided with a first guide groove 2-1 for accommodating and sliding the connecting rod 6 up and down, the lower end of the push rod component 3 is provided with a track groove 3-1, the upper end of the connecting rod 6 is in sliding fit with the track groove 3-1 through a guide pin 7, the lower end of the connecting rod 6 is in sliding fit with the upper end of the front bracket component 1 through a connecting pin 8.

The lower end of the connecting rod 6 is provided with a lower slotted hole 6-1, the upper end of the front support assembly 1 is provided with a first slotted hole 1-1 corresponding to the lower slotted hole 6-1, any one of the lower slotted hole 6-1 and the first slotted hole 1-1 is a round hole, the other one is an oblong hole, and the connecting pin 8 is simultaneously inserted into the lower slotted hole 6-1 and the first slotted hole 1-1 to realize sliding fit of the lower slotted hole 6-1 and the first slotted hole 1-1. In the figure of the present embodiment, the lower slot 6-1 is a circular hole, and the first slot 1-1 is an oblong hole.

In the folding process, when the push rod assembly 3 turns downwards and is folded relative to the rear support assembly 2, the guide pin 7 is in sliding fit with the track groove 3-1 to drive the connecting rod 6 to slide upwards in the first guide groove 2-1, and the lower end of the connecting rod 6 drives the front support assembly 1 to rotate backwards and is folded relative to the rear support assembly 2 through the connecting pin 8, so that the whole vehicle is folded.

According to the folding linkage structure, the folding linkage structure is formed at the rotating joint through the mounting connection relationship among the front support assembly 1, the rear support assembly 2, the push rod assembly 3 and the connecting rod 4, the whole frame structure is very simple, and the problem of inconvenient folding operation caused by excessive rod pieces is avoided.

In this embodiment, the locking mechanism includes a first locking mechanism 9 for locking the push rod assembly 3 and the rear bracket assembly 2 when the frame is in the unfolding position, and a second locking mechanism 10 for locking the front bracket assembly 1 and the rear bracket assembly 2 in a limiting manner when the frame is in the unfolding position, the second locking mechanism 10 and the first locking mechanism 9 are a linkage type locking structure, and the first locking mechanism 9 drives the second locking mechanism 10 to perform locking movement while performing locking movement, so as to lock the first locking mechanism 9 and the second locking mechanism 10 at the same time.

As shown in fig. 5 to 9, the first locking mechanism 9 includes a cross connecting tube 9-1 located at the upper part of the rear bracket assembly 2, a mounting seat 9-2 disposed at a middle position in the cross connecting tube 9-1, slide bars 9-3 disposed in the cross connecting tube 9-1 and disposed at both sides of the mounting seat 9-2, and an unlocking handle 9-4 covering the cross connecting tube 9-1 and rotatable relative thereto, a first reset piece 9-5 is arranged between the slide bar 9-3 and the mounting seat 9-2, the inner end of the slide bar 9-3 is provided with a convex pin 9-6, the transverse connecting pipe 9-1 is provided with a second guide groove 9-7 which is in transverse sliding fit with the convex pin 9-6, a guide chute 9-8 in sliding fit with the inclined surface of the convex pin 9-6 is arranged on the unlocking handle 9-4; the outer end of the sliding rod 9-3 is provided with a bolt 9-9, and the lower part of the push rod component 3 is provided with a lock groove 9-10 for locking the bolt 9-9.

Furthermore, the first locking mechanism 9 further comprises two locks 9-11, the two locks 9-11 penetrate through the limiting grooves 9-12 of the unlocking handle 9-4 and the penetrating grooves 9-13 of the transverse connecting pipe 9-1 to be inserted into the mounting grooves 9-14 of the mounting seat 9-2, and a second resetting piece 9-15 is arranged between the two locks and the mounting seat 9-2.

Furthermore, the unlocking handle 9-4 comprises an inner sleeve 9-16 and a handle seat 9-17 which is coated outside the inner sleeve 9-16 and is relatively fixed with the inner sleeve 9-16, the guide chute 9-8 and the limiting groove 9-12 are both formed on the inner sleeve 9-16, an operating handle 9-18 is formed on the handle seat 9-17, a button groove 9-19 is arranged at the position corresponding to the second lock 9-11, and an operating button 9-20 capable of moving inside and outside is arranged at the button groove 9-19.

The working principle of the first locking mechanism 9 is as follows:

when the frame is in an unfolded state, the sliding rod 9-3 transversely moves outwards under the reset action of the first reset piece 9-5, and the lock tongue 9-9 is inserted into the corresponding lock groove 9-10 to lock the push rod assembly 3; meanwhile, the second lock 9-11 is abutted against one end of the limiting groove 9-12 of the unlocking handle 9-4, and the unlocking handle 9-4 cannot rotate towards the unlocking direction;

when the first locking mechanism 9 needs to be unlocked, firstly, the operating button 9-20 is pressed to drive the second lock 9-11 to move inwards to exit from the limit groove 9-12 of the unlocking handle 9-4, and the limit of the unlocking handle 9-4 is released; then, the unlocking handle 9-4 is rotated towards the unlocking direction, the guide chute 9-8 is in sliding fit with the inclined surface of the convex pin 9-6, the slide rod 9-3 is driven to move inwards, and the lock tongue 9-9 is enabled to exit from the lock groove 9-10, so that unlocking is achieved.

According to the utility model, the first locking mechanism 9 is provided with the second lock 9-11, when the frame is in an unfolded state, the second lock 9-11 can block the unlocking handle 9-4, so that the unlocking handle cannot rotate towards the unlocking direction, namely the first locking mechanism 9 cannot be unlocked; when the first locking mechanism 9 needs to be unlocked, the second lock 9-11 must be pressed first, and the blocking of the unlocking handle 9-4 is released, so that the unlocking handle 9-4 can rotate towards the unlocking direction; the design can greatly improve the safety of locking, and avoid accidental unlocking caused by misoperation or touch.

As shown in fig. 5 to 7, the second locking mechanism 10 includes a lock block 10-1 having one side pin-jointed and turnable with the rear bracket assembly 2, and a third returning member 10-2 disposed between the lock block 10-1 and the rear bracket assembly 2, an upper step 10-3 corresponding to the lock block 10-1 and a lower step 10-4 formed below the upper step 10-3 are formed at a joint portion of the front bracket assembly 1, a limit projection 10-5 corresponding to the lower step 10-4 is formed at a joint portion of the rear bracket assembly 2, the third returning member 10-2 always presses the lock block 10-1 in a direction away from the upper step 10-3, a step surface 10-6 is formed at an outer end of the slide bar 9-3 between the latch tongue 9-9 and the slide bar 9-3, and the step surface 10-6 is arranged corresponding to the locking block 10-1.

The linkage locking principle of the second locking mechanism 10 and the first locking mechanism 9 is as follows: when the first locking mechanism 9 is in locking motion, the lock tongue 9-9 of the sliding rod 9-3 of the first locking mechanism is inserted into the corresponding lock groove 9-10, the step surface 10-6 of the first locking mechanism drives the lock block 10-1 to overturn and enable the lock block to be clamped into the upper step 10-3 of the front support assembly 1, so that the front support assembly 1 is prevented from being folded and rotated, meanwhile, the limiting convex setting part 10-5 of the rear support assembly 2 is clamped at the lower step 10-4 of the front support assembly 1, the front support assembly 1 is prevented from being unfolded too far, and the first locking mechanism 9 and the second locking mechanism 10 are locked simultaneously.

The locking mechanism is novel and concise in structural design, a linkage part between the first locking mechanism 9 and the second locking mechanism 10 is omitted, and the volume and the assembly difficulty of the whole vehicle are greatly reduced.

In order to facilitate assembly and improve the overall aesthetic property, the connecting part of the rear support assembly 2 comprises an inner connecting seat 2-2 and an outer connecting seat 2-3 which can be locked and locked, and the connecting part of the push rod assembly 3, the connecting part of the front support assembly 1 and the connecting rod 6 are assembled between the corresponding inner connecting seat 2-2 and the corresponding outer connecting seat 2-3. In this embodiment, the transverse connecting pipe 9-1 is arranged between the inner connecting seats 2-2 at both sides of the rear bracket assembly 2, and the inner connecting seats 2-2 are communicated with the transverse connecting pipe 9-1, so that the outer end of the sliding rod 9-3 can extend into the inner connecting seats; the locking block 10-1 is rotatably arranged on the inner connecting seat 2-2, and the third resetting piece 10-2 is arranged between the locking block 10-1 and the outer connecting seat 2-3 and presses the locking block 10-1 to one side of the sliding rod 9-3.

In order to improve the stability during linkage, the two connecting rods 6 are arranged on two sides of the connecting part of the push rod assembly 3 and the connecting part of the front support assembly 1 in a bilateral symmetry manner, and the inner connecting seat 2-2 and the outer connecting seat 2-3 are respectively provided with a first guide groove 2-1. In this embodiment, the middle of the guide pin 7 is inserted into the track groove 3-1, and both ends are respectively assembled with the two connecting rods 6, the middle of the connecting pin 8 is inserted into the first slot hole 1-1, and both ends are respectively assembled into the lower slot holes 6-1 of the two connecting rods 6.

In order to facilitate the assembly of the child seat pocket, the inner side of the inner connecting seat 2-2 is provided with a plug-in part 11 for the plug-in of the child seat pocket. The design is conventional in the art and is not specifically limited and described herein.

The above are only specific application examples of the present invention, and do not limit the scope of the present invention in any way. In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by using equivalent substitutions or equivalent transformations fall within the scope of the present invention.

Claims (10)

1. The utility model provides a collapsible children's shallow, including the frame that has expansion position and folding position and lock the frame in the locking mechanical system under the expansion position, the frame is including front bracket component (1) of installing front wheel subassembly (4), rear bracket component (2) and push rod subassembly (3) of installing rear wheel subassembly (5), its characterized in that: the lower end of the push rod assembly (3) is rotatably connected with the upper end of the rear support assembly (2), the upper end of the front support assembly (1) is rotatably connected with the front upper side of the rear support assembly (2), the frame further comprises a connecting rod (6), the rear support assembly (2) is provided with a first guide groove (2-1) for accommodating and sliding the connecting rod (6), the push rod assembly (3) is provided with a track groove (3-1), one end of the connecting rod (6) is in sliding fit with the track groove (3-1) through a guide pin (7), and the other end of the connecting rod (6) is in sliding fit with the front support assembly (1) through a connecting pin (8);

in the folding process, when the push rod assembly (3) overturns downwards and is folded relative to the rear support assembly (2), the guide pin (7) is in sliding fit with the track groove (3-1) to drive the connecting rod (6) to slide in the first guide groove (2-1), and the connecting rod (6) drives the front support assembly (1) to rotate backwards and is folded relative to the rear support assembly (2) through the connecting pin (8), so that the whole vehicle is folded.

2. A foldable stroller according to claim 1, wherein: locking mechanical system includes right when the frame is in the expansion position push rod subassembly (3) and rear bracket subassembly (2) realize first locking mechanical system (9) of locking and right when the frame is in the expansion position front bracket subassembly (1) and rear bracket subassembly (2) realize second locking mechanical system (10) of spacing locking, just second locking mechanical system (10) are linkage type locking structure with first locking mechanical system (9), first locking mechanical system (9) drive when locking the motion second locking mechanical system (10) carry out the locking motion, and then realize locking when first locking mechanical system (9) and second locking mechanical system (10).

3. A foldable stroller according to claim 2, wherein: the first locking mechanism (9) comprises a transverse connecting pipe (9-1) positioned at the upper part of the rear support assembly (2), a mounting seat (9-2) arranged at the middle position in the transverse connecting pipe (9-1), sliding rods (9-3) penetrating in the transverse connecting pipe (9-1) and arranged on two sides of the mounting seat (9-2), and an unlocking handle (9-4) covering the transverse connecting pipe (9-1) and capable of rotating relative to the transverse connecting pipe, a first reset piece (9-5) is arranged between the sliding rods (9-3) and the mounting seat (9-2), a convex pin (9-6) is arranged at the inner end of the sliding rod (9-3), a second guide groove (9-7) in transverse sliding fit with the convex pin (9-6) is arranged in the transverse connecting pipe (9-1), and a slope (9-4) of the unlocking handle is provided with a slope in sliding fit with the convex pin (9-6) A guide chute (9-8); a lock tongue (9-9) is formed at the outer end of the sliding rod (9-3), and a lock groove (9-10) for locking the lock tongue (9-9) is formed at the lower part of the push rod assembly (3);

when the frame is in an unfolded state, the sliding rods (9-3) move outwards transversely under the reset action of the first reset pieces (9-5), and the lock tongues (9-9) are inserted into the corresponding lock grooves (9-10) to lock the push rod assembly (3);

when the first locking mechanism (9) needs to be unlocked, the unlocking handle (9-4) is rotated, the guide chute (9-8) is in sliding fit with the inclined surface of the convex pin (9-6) to drive the sliding rod (9-3) to move inwards, so that the lock tongue (9-9) is withdrawn from the lock groove (9-10), and unlocking is realized.

4. A foldable stroller according to claim 3, wherein: the first locking mechanism (9) further comprises two locks (9-11), the two locks (9-11) penetrate through the limiting grooves (9-12) of the unlocking handle (9-4) and the through grooves (9-13) of the transverse connecting pipe (9-1) to be inserted into the mounting grooves (9-14) of the mounting seat (9-2), and a second reset piece (9-15) is arranged between the first locking mechanism and the mounting seat (9-2);

when the frame is in an unfolded state, the two locks (9-11) are abutted against one ends of the limiting grooves (9-12) of the unlocking handles (9-4), and the unlocking handles (9-4) cannot rotate towards the unlocking direction;

when the first locking mechanism (9) needs to be unlocked, the first locking mechanism (9) is moved inwards to exit from the limiting groove (9-12) of the unlocking handle (9-4) by pressing the second lock (9-11), and the unlocking handle (9-4) can rotate towards the unlocking direction.

5. The foldable stroller of claim 4, wherein: the unlocking handle (9-4) comprises an inner sleeve (9-16) and a handle seat (9-17) which is coated outside the inner sleeve (9-16) and is relatively fixed with the inner sleeve, the guide chute (9-8) and the limiting groove (9-12) are formed on the inner sleeve (9-16), an operating handle (9-18) is formed on the handle seat (9-17), a button groove (9-19) is arranged at a position corresponding to the second lock (9-11), and an operating button (9-20) capable of moving inside and outside is arranged at the button groove (9-19);

when the frame is in an unfolded state, the operating button (9-20) is pressed to drive the two locks (9-11) to move inwards so as to release the limit of the unlocking handle (9-4).

6. A foldable stroller according to claim 3, wherein: the second locking mechanism (10) comprises a locking block (10-1) with one side connected with the rear support assembly (2) in a pin mode and capable of turning and a third reset piece (10-2) arranged between the locking block (10-1) and the rear support assembly (2), an upper step (10-3) corresponding to the locking block (10-1) and a lower step (10-4) formed below the upper step (10-3) are formed at the connecting part of the front support assembly (1), a limiting protruding part (10-5) corresponding to the lower step (10-4) is formed at the connecting part of the rear support assembly (2), the third reset piece (10-2) always presses the locking block (10-1) to the direction separated from the upper step (10-3), and a step surface (10) is formed at the outer end of the sliding rod (9-3) between the locking bolt (9-9) and the sliding rod (9-3) -6), and the step surface (10-6) is arranged corresponding to the locking block (10-1);

when the first locking mechanism (9) is in locking motion, the lock tongues (9-9) of the sliding rods (9-3) of the first locking mechanism are inserted into the corresponding lock grooves (9-10), the step surfaces (10-6) of the first locking mechanism drive the locking blocks (10-1) to overturn and enable the locking blocks to be clamped into the upper steps (10-3) of the front support assembly (1) to prevent the front support assembly (1) from being folded and rotated, meanwhile, the limiting protruding setting parts (10-5) of the rear support assembly (2) are clamped at the lower steps (10-4) of the front support assembly (1) to prevent the front support assembly (1) from being unfolded too much, and therefore the first locking mechanism (9) and the second locking mechanism (10) are locked simultaneously.

7. The foldable stroller of claim 6, wherein: the connecting part of the rear support assembly (2) comprises an inner connecting seat (2-2) and an outer connecting seat (2-3) which can be buckled and locked, and the connecting part of the push rod assembly (3), the connecting part of the front support assembly (1) and the connecting rod (6) are all assembled between the corresponding inner connecting seat (2-2) and the corresponding outer connecting seat (2-3).

8. The foldable stroller of claim 7, wherein: the connecting rods (6) are arranged on two sides of the connecting part of the push rod assembly (3) and the connecting part of the front support assembly (1) in a bilateral symmetry mode, and first guide grooves (2-1) are formed in the inner connecting seat (2-2) and the outer connecting seat (2-3) respectively.

9. The foldable stroller of claim 7, wherein: the transverse connecting pipe (9-1) is arranged between the inner connecting seats (2-2) at two sides of the rear support component (2), and the inner connecting seats (2-2) are communicated with the transverse connecting pipe (9-1) and can be used for the outer end of the sliding rod (9-3) to extend into; the locking block (10-1) is rotatably arranged on the inner connecting seat (2-2), and the third resetting piece (10-2) is arranged between the locking block (10-1) and the outer connecting seat (2-3) and presses the locking block (10-1) to one side of the sliding rod (9-3).

10. A foldable stroller according to claim 1, wherein: the lower end of the connecting rod (6) is provided with a lower slotted hole (6-1), the upper end of the front support assembly (1) is provided with a first slotted hole (1-1) corresponding to the lower slotted hole (6-1), any one of the lower slotted hole (6-1) and the first slotted hole (1-1) is a round hole, the other one of the lower slotted hole (6-1) and the first slotted hole (1-1) is a long round hole, and the connecting pin (8) penetrates through the lower slotted hole (6-1) and the first slotted hole (1-1) simultaneously to realize sliding fit of the lower slotted hole (6-1) and the first slotted hole (1-1).

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