CN218750955U - Foldable baby carriage - Google Patents

Abstract

The utility model relates to a collapsible children's shallow, it includes: a bench assembly including a backrest and a bench, the backrest rotatably attached to the bench; and a foldable frame assembly, wherein the frame assembly further comprises: a telescopic rod assembly, the telescopic rod assembly has the push-up rod, the push-down rod, girder pipe and fixed bush, wherein the push-up rod is operatable to move relatively to the push-down rod, the push-down rod is operatable to move relatively to the girder pipe, fixed bush cover is established on the girder pipe and operatable to move relatively to the girder pipe, back fork leg subassembly, but its pivotal connection is to telescopic rod assembly, and folding connecting rod, folding connecting rod includes folding connecting rod and folding connecting rod down, it connects between the bench of sitting of fixed bush and bench subassembly to go up folding connecting rod, folding connecting rod connects between fixed bush and back fork leg subassembly down. According to the utility model discloses a collapsible children's shallow, the frame subassembly is whole lighter, and folding draw in the back volume in and littleer to it is more convenient to fold the operation.

Description

Foldable baby carriage

Technical Field

The utility model relates to a children's shallow, more specifically, the utility model relates to a folding children's shallow.

Background

The baby stroller is a necessary vehicle for children to go out. Various types of children's carts are available in the market at present, and different requirements of various age stages can be met.

To facilitate carrying, transport and storage, stroller vehicles are typically of a collapsible construction so that the stroller can be collapsed when not in use. Various types of foldable structures are currently on the market for use on children. With the improvement of living standard, people have higher and higher requirements on the convenience of going out. Thus, the operability of the stroller when folded and the size of the folded stroller are of concern to the consumer. More specifically, in the case of a folding stroller, the better the linkage of the various components of the stroller, the easier the folding and unfolding operations, and vice versa, the more laborious the operations. Regarding the folded volume of the stroller, in order to facilitate getting on and off the stroller and even getting off the airplane, it is desirable that the folded volume of the stroller is as small as possible. Even when stored in a home without use, the smaller the volume, the less space it takes.

The folding stroller in the prior art generally has a complex structure, a large volume after being folded, and poor operability. In other words, there is room for further improvement in several aspects of such products currently on the market.

SUMMERY OF THE UTILITY MODEL

In order to further improve the operational convenience of the foldable stroller and to make it more lightweight, according to the utility model discloses a foldable stroller includes: a bench assembly including a backrest and a bench, the backrest rotatably attached to the bench; and a frame assembly supporting the bench assembly and being foldable, wherein the frame assembly further comprises: a telescoping rod assembly having an upper push rod, a lower push rod, a girder tube and a fixed bushing, wherein the upper push rod is operable to move relative to the lower push rod, the lower push rod is operable to move relative to the girder tube, the fixed bushing is sleeved on the girder tube and is operable to move relative to the girder tube, a back fork leg assembly pivotably connected to the telescoping rod assembly, and a folding connecting rod, the folding connecting rod including an upper folding connecting rod and a lower folding connecting rod, the upper folding connecting rod is connected to the fixed bushing and the stool assembly between the stools, the lower folding connecting rod is connected to the fixed bushing and the back fork leg assembly between.

According to an aspect of the present invention, the telescopic rod assembly further comprises: the upper push rod locking device is used for limiting the sliding of the upper push rod relative to the lower push rod when the upper push rod locking device is locked, and the upper push rod can slide downwards into the lower push rod when the upper push rod locking device is unlocked; and a lower push rod locking device, when the lower push rod locking device is locked, the sliding of the lower push rod relative to the girder pipe is limited, and when the lower push rod locking device receives an actuating force from the upper push rod sliding into the lower push rod to unlock, the lower push rod can slide downwards into the girder pipe.

According to the utility model discloses a still another aspect, it is spacing that the push-up rod locking device includes the push-up rod, wherein the lower extreme of push-down rod is equipped with first push-up rod fixed orifices, works as when the push-up rod contracts in the push-down rod, the push-up rod is spacing to be passed first push-up rod fixed orifices, and the lower extreme of girder pipe is equipped with second push-up rod fixed orifices, works as the push-up rod with the push-down rod contracts when in the girder pipe, the push-up rod is spacing to be passed first push-up rod fixed orifices gets into second push-up rod fixed orifices.

According to another aspect of the utility model, the telescopic link subassembly still includes bush stop device, bush stop device has by elasticity biased the projection arrive the inside folding spacing and return spring of girder pipe. When the lower push rod slides in the girder pipe and passes through the folding limit, the folding limit is actuated to move and unlock against the elastic force of the return spring, and the fixed bushing is allowed to slide on the girder pipe.

According to the utility model discloses a still another aspect, fixed bush still includes fixed stifle, fixed stifle detachably installs fixed bush, folding spacing with return spring is fixed in the inside of fixed stifle.

According to a further aspect of the invention, the lower end of the lower push rod is provided with a lower push rod lower bushing having a ramp surface with the folding limit joint.

According to still another aspect of the present invention, the push-up rod locking device includes an actuating member, a position restricting member for fixing the push-up rod with respect to the lower push rod, and a transmission member for transmitting an operating force of the actuating member to the position restricting member.

According to the utility model discloses a further aspect, be provided with the handle on the push up rod, push up rod locking device's actuating member includes the release button and sets up adjustment button on the handle, release button arrange into with the adjustment button interlock, thereby work as release when release button presses adjustment button's locking.

According to the utility model discloses a still another aspect, back fork leg subassembly includes: a pair of fork legs, said fork legs mounting wheels; a rear fork leg rotation bushing rotatably connecting the fork leg to the main beam tube; and a bench assembly fixing bushing rotatably connected to the rear fork leg rotating bushing and fixed to the bench assembly.

According to a further aspect of the invention, the bench assembly comprises a backrest limiting device configured to be multiple relative to the angle locking of the bench the backrest.

According to another aspect of the utility model, back stop device is including setting up back unblock pull button on sitting the bench is used for relieving the back is relative sit the locking of bench.

According to the utility model discloses a collapsible children's shallow, its frame subassembly structure has adopted the structure of syllogic telescopic link, and the frame subassembly is whole more light, and the folding back volume of drawing in is littleer.

According to the utility model discloses a folding operation of collapsible children's shallow is more convenient, as long as holding and carrying out unblock actuation operation on the handle, along with telescopic link assembly's the shrink that bulldozes, the frame interlock of whole shallow draws in, need not extra action.

Drawings

For a more complete understanding of the present invention, reference is made to the following description of exemplary embodiments taken in conjunction with the accompanying drawings, in which:

fig. 1 shows a front view of a stroller according to a preferred embodiment of the present invention.

Fig. 2 shows a side view of a stroller according to a preferred embodiment of the present invention.

Fig. 3 shows another side view of the stroller according to the preferred embodiment of the present invention, with a partial structure cut away.

Fig. 4 shows a front view of the bench assembly of the stroller according to the preferred embodiment of the present invention.

Figure 5 shows an inverted perspective view of the bench assembly of the stroller according to the preferred embodiment of the present invention.

Fig. 6 illustrates an exploded perspective view of a portion of a telescoping rod assembly of a stroller in accordance with a preferred embodiment of the present invention.

Fig. 7 shows an exploded perspective view of the main beam tube and the fork leg assembly of the stroller according to the preferred embodiment of the present invention.

Fig. 8 shows a perspective view of a telescopic rod assembly according to another preferred embodiment of the present invention.

Fig. 9 is a schematic view illustrating a folding operation of the stroller according to the preferred embodiment of the present invention.

List of reference numerals

100 children's barrow

1 Telescopic rod assembly

11 push-up rod

11-1 handle

11-2 unlocking button

11-3 transfer rod

11-4 upper transfer pin

11-5 upper push rod limit

11-6 upper push rod lower bushing

11-7 fixed pin

11-8 via holes

11-9 via holes

11-11 regulating button

11-22 unlocking button fixing bush

11-111 step part

11-45 slope

11-55 slope

12 push down rod

12-1 lower transfer pin

12-2 lower push rod limiting

12-3 lower push rod lower bushing

12-4 push-down handle upper bushing

12-5 first upper push rod fixing hole

13 crossbeam pipe

13-2 second upper push rod fixing hole

14 fixed bush

14-1 fold limit

14-2 fixed blank cap

14-11 return spring

2 bench component

2-1 backrest

2-4 stool

2-5 unlocking pull button

2-6 faldstool subassembly fixed bush

3. Lower folding connecting rod

4. Upper folding connecting rod

5. Rear fork leg assembly

5-1 rear pedal

5-2 fork leg

5-22 rear fork leg rotating bush

7 wheel

Detailed Description

The present invention will be further described with reference to the following embodiments and drawings, and more details will be set forth in the following description in order to provide a thorough understanding of the present invention, but it is obvious that the present invention can be implemented in various other ways different from those described herein, and those skilled in the art can make similar generalizations and deductions according to the actual application without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited by the contents of the embodiments.

Fig. 1 and 2 show a front view and a side view, respectively, of a foldable stroller 100 according to a preferred embodiment of the present invention, wherein the stroller 100 is in an unfolded use position. In general, the stroller 100 includes a bench assembly 2 and a foldable frame assembly, the bench assembly 2 being supported by the frame assembly. The stroller 100 further includes a plurality of wheels, four in the preferred embodiment, which are foldably mounted to the frame assembly.

As shown in fig. 1 and 2, the foldable frame assembly mainly includes a telescopic bar assembly 1, a rear fork leg assembly 5, and a folding link. The folding linkage further comprises an upper folding linkage 4 and a lower folding linkage 3, wherein the lower folding linkage 3 is between the telescoping rod assembly 1 and the rear fork leg assembly 5 and the upper folding linkage 4 is pivotally attached between the telescoping rod assembly 1 and the bench assembly 2 such that, when the entire frame assembly is folded, the upper folding linkage 4 acts to collapse the bench assembly 2 toward the telescoping rod assembly 1 and the lower folding linkage 3 acts to collapse the rear fork leg assembly 5 toward the telescoping rod assembly 1.

The utility model discloses a collapsible children's shallow 100's telescopic link subassembly 1 is the syllogic, specifically include push-up rod 11, push-down rod 12 and girder pipe 13, as shown in fig. 3, push-up rod 11 covers is established in push-down rod 12, from this push-up rod 11 operationally relative push-down rod 12 slides, push-down rod 12 covers is established in girder pipe 13, from this push-down rod 12 operationally relative girder pipe 13 slides, along with push-up rod 11, push-down rod 12 and girder pipe 13 slip each other, the telescopic link subassembly 1 of syllogic can change between extending state and contraction state. In addition, the telescopic rod assembly 1 further comprises a fixing bush 14 which is attached to the upper folding connecting rod 4 and the lower folding connecting rod 3 to drive the connecting rods 3 and 4 to move, and the fixing bush 14 is sleeved on the girder pipe 13.

In order to realize the controllable extension and contraction of the upper push rod 11, the lower push rod 12 and the girder pipe 13, the telescopic rod component 1 is provided with an upper push rod 11 locking device and a lower push rod 12 locking device. When the locking device of the upper push rod 11 is locked, the sliding of the upper push rod 11 relative to the lower push rod 12 is limited, and when the locking device of the upper push rod is unlocked, the upper push rod 11 can slide downwards into the lower push rod 12. While the sliding of the lower push rod 11 with respect to the girder tube 13 is restricted when the lower push rod locking means is locked, the lower push rod 12 can slide down into the girder tube 13 when the lower push rod locking means is unlocked.

The push-up lever locking device mainly includes an actuating member for user operation, a stopper member for fixing the push-up lever 11 with respect to the push-down lever 12, and a transmitting member for transmitting an operating force of the actuating member to the stopper member.

In a preferred embodiment, as shown particularly in fig. 3 and 6, the actuating components of the upper push rod locking device essentially comprise an unlocking button 11-2 slidably secured within an unlocking button securing bushing 11-22 and an adjustment button 11-11 disposed in a grip 11-1 on the top end of the upper push rod 11. The inner space of at least the middle part of the grip 11-1 is communicated with the inner space of the upper push rod 11. The adjusting button 11-11 is arranged in a section of the grip 11-1 connected with the upper push rod 11-3, and the top of the adjusting button 11-11 is exposed out of the grip 11-1, and the adjusting button 11-11 has a step part 11-111, and is abutted with two side limit parts 11-23 of the lower unlocking button 11-2 through the step part 11-111. The unlocking button 11-2 is fixed in the unlocking button fixing bush 11-22 in a sliding mode, the front end of the unlocking button 11-2 vertically penetrates through a through hole 11-9 formed in the handle 11-1 and a through hole 11-8 formed in the side face of the upper push rod 11 at the corresponding position, one end portion of the unlocking button 11-2 is exposed outside the handle 11-1 to facilitate operation of a user, and a return spring 11-21 used for providing elastic biasing force for the unlocking button 11-2 is arranged inside the unlocking button 11-2. In use, the adjustment button 11-11 can be unlocked when the unlock button 11-2 is pressed.

The transmission means for transmitting the operating force of the actuating means to the position restricting means in the upper push rod 11 mainly includes a transmission lever 11-3 and a transmission pin 11-4. Preferably, the upper end of the transfer lever 11-3 is provided with an upper bushing 11-31 and abuts against the lower portion of the adjustment button 11-1, and the lower end of the transfer lever 11-3 is provided with a lower bushing and abuts against the transfer pin 11-4, so that the transfer lever 11-3 can receive the operation of the adjustment button 11-1.

The limiting component used for fixing the upper push rod 11 relative to the lower push rod 12 mainly comprises an upper push rod limiting component 11-5 and a return spring 11-51 arranged in the upper push rod limiting component 11-5. Meanwhile, the lower end of the upper push rod 11 is provided with an upper push rod lower bushing 11-6, and the upper push rod lower bushing 11-6 is fixed on the upper push rod 11 through a fixing pin 11-7. The upper push rod limit 11-5 is arranged in the upper push rod lower bushing 11-6 in a sliding mode and can penetrate through the outer side portion of the upper push rod 11 to penetrate through the upper end fixing hole of the lower push rod 12, and the upper push rod 11 is fixed to the lower push rod 12 at the position. The upper push rod stopper 11-5 has slope surfaces 11-55 at both sides, which can abut against the slope 11-45 of the upper transfer pin 11-4 provided through the upper push rod lower bushing 11-6, so that the upper push rod stopper 11-5 can be actuated when the upper transfer pin 11-4 is pushed downward. Further, a lower push rod upper bushing 12-4 is fixedly provided at an upper end of the lower push rod 12, and the bushing 12-4 is configured such that the upper push rod 11 cannot be separated from the lower push rod 12.

Referring also to fig. 3, the push down lever locking device mainly includes a stopper member for fixing the push down lever 12 with respect to the girder tube 13, and a transmission member for transmitting the operating force of the actuating member to the stopper member. The limiting component mainly comprises a lower push rod limiting part 12-2 and a return spring 12-21, and the arrangement mode of the limiting component is basically the same as that of the upper push rod limiting part 11-5 and the return spring 11-51. And the transfer parts in the lower push rod locking device mainly include the lower transfer pin 12-1 and the upper push rod 11 itself. When the telescopic rod assembly 1 is retracted, the transfer pin 12-1 will be pressed by the upper push rod lower bushing 11-6 at the lower end of the upper push rod 11 and the force transfer is transferred to the lower push rod stop 12-2 by the engagement of the matching ramp surfaces between the transfer pin 12-1 and the lower push rod stop 12-2, so that the lower push rod stop 12-2 is unlocked.

As further shown in fig. 3, the telescopic pole assembly 1 further comprises a bushing stop for operating and controlling the locking and sliding of the fixing bushing 14 relative to the girder pipe 13. The bushing limiting device mainly comprises a folding limiting device 14-1 and a return spring 14-11 arranged in the folding limiting device 14-1. The folding stoppers 14-1 pass through the fixing holes of the girder pipe 13 from the outside to the inside by the elastic force of the return springs 14-11, thereby fixing the fixing bushing 14 to the girder pipe 13. When the lower push rod 12 slides through the fold limit 14-1 in the girder tube 13, the fold limit 14-1 is pushed by the lower push rod 12, specifically, the lower push rod lower bushing 12-3 provided on the lower push rod 12, so that the fold limit 14-1 can be biased radially outward against the spring force, so that the locking of the fixing bushing 14 with respect to the girder tube 13 is released, allowing the fixing bushing 14 to slide on the girder tube 13. Preferably, the lower push rod bushing 12-3 is in contact fit with the fold limit 14-1 through a matching ramp surface. Therefore, with the above-described structure, when the lower push rod 12 slides in the girder pipe 13 through the folding limit 14-1, the folding limit 14-1 can be unlocked to allow the fixing bush 14 to slide on the girder pipe 13, and the unlocking operation of the fixing bush 14 is performed by itself at the same time as the retracting operation of the telescopic rod assembly 1, and cannot be additionally operated by a user.

In order to facilitate the installation of the folding stopper 14-1 and the return spring 14-11, the fixing bush 14 is provided with a fixing blank cap 14-2 detachably fixed to the fixing bush 14, so that the folding stopper 14-1 and the return spring 14-11 can be conveniently and fixedly installed inside the fixing bush 14 by sliding the fixing blank cap 14-2.

As can be seen clearly in fig. 3, the folding links 3 and 4 are attached to a fixed bushing 14, wherein one end of the upper folding link 4 is pivotally connected above the bushing 14 and the other end is pivotally connected below the stool, one end of the lower folding link 3 is pivotally connected below the bushing 14 and the other end of the lower folding link 3 is pivotally connected to the rear pedal 5-1 in the rear fork leg assembly 5.

Fig. 7 shows an exploded perspective view of the longeron tube 13 and the rear fork leg assembly 5. The rear fork leg assembly 5 comprises pairs of fork legs 5-2 each for mounting a wheel 7. The two fork legs are respectively fixedly provided with a rear fork leg rotating bushing 5-22, the two fork legs 5-2 are rotationally fixed on a connecting bushing 15 by the rear fork leg rotating bushing 5-22 in the left-right direction through a screw, and the connecting bushing 15 is fixed on the upper end of the girder pipe 13, so that the fork legs 5-2 can rotate relative to the girder pipe 13. Preferably, corresponding angular stops are provided in the connecting bushing 15 to limit the rear fork leg angle and increase the strength of the deployed use.

Furthermore, the rear fork leg assembly 5 is provided with bench assembly fixing bushings 2-6 for fixing the bench assembly 2, preferably the bench assembly fixing bushings 2-6 are provided in pairs, the bench assembly fixing bushings 2-6 being configured to be rotatably connected to the rear fork leg rotating bushings 5-22.

Figures 4 and 5 show the bench assembly 2 supported by the frame assembly, the bench assembly 2 being retained on the frame assembly by means of bench assembly fixing bushings 2-6 located on the fork-back leg assembly 5. The bench assembly 2 comprises a backrest 2-1 which can be overturned and a bench 2-4 which is rotatably fixed on the backrest 2-1. A limiting device is arranged inside the joint of the backrest 2-1 and the stool 2-4 and used for locking the backrest 2-1 at various angles and unlocking the backrest through a backrest unlocking pull button 2-5. When the backrest unlocking button 2-5 is pulled, the backrest 2-1 can be overturned forwards and closed towards the direction of the stool 2-4. The bench assembly 2 preferably also includes a rail 2-2. In a preferred embodiment, the surrounding bar 2-2 is rotatably fixed to the stool 2-4 and shares the same unlocking knob 2-5 with the backrest. In other alternative embodiments, the rail 2-2 may be configured to be detachable.

Further, as shown in FIG. 8, in a modified embodiment, the lower end of the lower push rod 12 is provided with a first upper push rod fixing hole 12-5, and the lower end of the girder pipe 13 is provided with a second upper push rod fixing hole 13-2. When the upper push rod 11 slides into the lower push rod 13 to set a furling position, the limit 11-5 on the upper push rod 11 jumps into the first upper push rod fixing hole 12-5 at the lower end of the lower push rod 12 under the action of the resilience force of the spring, so that the upper push rod 11 is fixed with the lower push rod 12, when the fixed upper push rod 11 and the lower push rod 12 slide into the girder pipe 13 to set a furling position, the upper push rod limit 11-5 passes through the first upper push rod fixing hole 12-5 on the lower push rod 12 and jumps into the second lower push rod fixing hole 13-2 on the girder pipe 13, and at the same time, the upper push rod 11, the lower push rod 12 and the girder pipe 13 are fixed together. Thus, the entire cart 100 can be conveniently lifted directly by the handle 11-1 both when and after folding.

Referring to fig. 9, the novel foldable stroller 100 according to the present invention is folded as follows.

The user first pulls the backrest unlock button 2-5 to move the backrest 2-1 down against the stool 2-4 and then presses the unlock button 11-2, which unlocks the adjustment button 11-11 to be actuated. Then, a user presses the adjusting button 11-11 to push the transmission rod 11-3 to move downwards, the transmission rod 11-3 pushes the upper transmission pin 11-4 to move downwards, and the upper transmission pin 11-4 pushes the push rod limit 11-5 to slide in the upper push rod lower bushing 11-6 and separate from the through hole of the lower push rod 12 due to the fact that the slope surfaces on the two sides of the upper push rod limit 11-5 abut against the transmission pin 11-4, and the upper push rod 11-11 is allowed to move downwards in the lower push rod 12. When the upper push rod 11 moves to a certain position, the upper push rod lower bushing 11-6 at the lower end of the upper push rod 11 presses the lower transmission pin 12-1, and the lower transmission pin 12-1 moves downwards to enable the lower push rod limit 12-2 to move inwards to be separated from the hole on the girder pipe 13, so that the upper push rod 11 and the lower push rod 12 are allowed to move downwards in the girder pipe 13 together. As the upper push rod 11 and the lower push rod 12 move downward in the girder pipe 13, the lower push rod lower bushing 12-3 presses the folding stopper 14-1, so that the folding stopper 14-1 is separated from the girder pipe 13 and moves downward. At this time, the fixing bush 14 outside the girder tube 13 is unlocked to move downward, so that the upper folding link 4 and the lower folding link 3 rotatably connected to the fixing bush 14 are pivotally moved downward and inwardly drawn together, the stool connected to the upper folding link 4 and the rear fork leg assembly 5 connected to the lower folding link 3 are inwardly drawn together and finally the folding of the stroller is completed.

According to the utility model discloses a collapsible children's shallow 100, its frame subassembly structure has adopted the structure of syllogic telescopic link, and the frame subassembly is whole lighter, and folding back volume of drawing in is littleer.

According to the utility model discloses a folding operation of collapsible children's shallow 100 is more convenient, as long as it unlocks the actuation operation on holding the handle, along with telescopic link assembly 1 bulldozes the shrink, whole shallow 1's frame subassembly interlock draws in, need not extra action.

Although the preferred embodiments of the present invention have been disclosed, the present invention is not limited thereto, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.

Claims (10)

1. A foldable stroller, comprising:

a bench assembly comprising a backrest (2-1) and a bench (2-4), the backrest being rotatably attached to the bench; and

a frame assembly supporting the bench assembly and foldable,

it is characterized in that the preparation method is characterized in that,

the frame assembly further includes:

a telescoping pole assembly (1) having an upper push rod (11) operable to move relative to a lower push rod (12) operable to move relative to the girder tube, a girder tube (13) and a stationary bushing (14) sleeved on the girder tube and operable to move relative to the girder tube,

a rear fork leg assembly (5) pivotably connected to the telescopic rod assembly, an

The folding connecting rod comprises an upper folding connecting rod and a lower folding connecting rod, the upper folding connecting rod is connected between the fixed bushing and the stool assembly, and the lower folding connecting rod is connected between the fixed bushing and the rear fork leg assembly.

2. The foldable stroller of claim 1, wherein said telescoping rod assembly comprises:

the upper push rod locking device is used for limiting the sliding of the upper push rod relative to the lower push rod when the upper push rod locking device is locked, and the upper push rod can slide downwards into the lower push rod when the upper push rod locking device is unlocked; and

a lower push rod locking device, when the lower push rod locking device is locked, the sliding of the lower push rod relative to the girder pipe is limited, and when the lower push rod locking device receives the actuating force from the upper push rod sliding into the lower push rod and is unlocked, the lower push rod can slide downwards into the girder pipe.

3. The foldable stroller of claim 1 or 2, wherein said telescoping rod assembly further comprises:

a bushing stop having a fold stop (14-1) resiliently biased to project into the longeron tube and a return spring (14-11), the fold stop being actuated to move unlocked against the resilient force of the return spring when the pushrod slides within the longeron tube past the fold stop, allowing the stationary bushing to slide over the longeron tube.

4. The foldable stroller (claim 3), characterized in that said fixed sleeve further comprises a fixed blank cap (14-2) detachably mounted to said fixed sleeve, said fold limit and said return spring being fixed inside said fixed blank cap.

5. The foldable stroller of claim 3, wherein the lower end of the lower push rod is provided with a lower push rod bushing (12-3) having a ramp surface engaging the fold limit.

6. The foldable stroller of claim 2, wherein said push-up bar locking means comprises a push-up bar stop,

wherein the lower end of the lower push rod is provided with a first upper push rod fixing hole, when the upper push rod is contracted into the lower push rod, the upper push rod is limited to penetrate through the first upper push rod fixing hole,

and the lower end of the girder pipe is provided with a second upper push rod fixing hole, and when the upper push rod and the lower push rod are contracted into the girder pipe, the upper push rod is limited to pass through the first upper push rod fixing hole and enter the second upper push rod fixing hole.

7. The foldable stroller as recited in claim 1, wherein the push-up lever locking means comprises an actuating member, a stopper member for fixing the push-up lever with respect to the push-down lever, and a transmission member for transmitting an operating force of the actuating member to the stopper member.

8. The foldable stroller of claim 7, wherein the upper push rod is provided with a grip (11-1),

the actuating component of the push-up rod locking device comprises an unlocking button (11-2) and an adjusting button (11-11) arranged on the handle, wherein the unlocking button is arranged to be interlocked with the adjusting button so as to release the locking of the adjusting button when the unlocking button is pressed down.

9. The foldable stroller according to claim 1, characterized in that said rear fork-leg assembly (5) comprises:

-a pair of fork legs (5-2) fitted with wheels (7);

a rear fork leg rotation bushing (5-22) rotatably connecting the fork leg to the main beam tube; and

a bench assembly fixing bushing (2-6) rotatably connected to the rear fork leg rotating bushing and fixed to the bench assembly.

10. The foldable stroller of claim 1, wherein the bench assembly comprises a backrest stop configured to lock the backrest at a plurality of angles relative to the bench, and the backrest stop comprises a backrest unlocking knob (2-5) provided on the bench for unlocking the backrest relative to the bench.

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