CN111874079B - A foldable baby stroller - Google Patents

Abstract

A folding stroller for children, comprising: a rear support, a rear wheel is installed at the bottom of the rear support, an armrest seat is installed at the top of the rear support, and the front armrest is hinged to the front end of the seat cushion; a reset seat and a positioning seat are also hingedly installed in the middle of the rear support, the front end of the positioning seat is hinged to the front support, and the rear end of the positioning seat is hinged to the push rod, the front wheel is installed at the bottom of the front support, the front end of the reset seat is hinged to the front support through a pull arm, the rear end of the reset seat is installed with a rear support rod, the top of the rear support rod is provided with a rear hinge seat, a positioning sleeve is hingedly installed in the rear hinge seat, the positioning sleeve is sleeved on the surface of the push rod and slides along the push rod; a locking mechanism is installed in the positioning sleeve, and the locking mechanism locks the relative position between the positioning sleeve and the push rod. The beneficial effects of the present invention are: the seat cushion and backrest are supported by a hard material in this case, so compared with the traditional flexible seat, it is more comfortable to ride; the unique folding structure can realize one-key folding, and improve the convenience of folding.

Description

A foldable baby stroller

Technical Field

The invention relates to a baby carriage, in particular to a folding baby carriage.

Background Art

A stroller for children is a must-have tool for families with babies. It is suitable for younger infants and young children. When going out, the infant or young child can be placed in the stroller and pushed around, which prevents parents from getting tired from holding the baby for a long time and makes it more convenient and comfortable for the infant or young child to move independently. In order to facilitate carrying, the stroller is also designed as a foldable stroller, which can be folded when needed. The size of the folded stroller is greatly reduced, and it can be placed in the car when traveling. After arriving at the predetermined location, the stroller can be taken out and stretched out for use.

As people travel more and more, flying around the world is very common, and the demand for taking foldable strollers on trains and planes is increasing. Therefore, further requirements are put forward for the folding method and volume of foldable strollers, requiring them to be easier to fold and small enough to be taken on the plane. At the same time, while meeting these requirements, the comfort of use cannot be sacrificed, and they need to have sufficient height and width. For this reason, the research on foldable strollers has always attracted people's attention and is an important direction for the development of strollers.

However, most of the strollers on the market now often have the following problems, such as: the folded volume is large and not easy to carry; or the folding mechanism is complicated and not easy to fold; or the comfort of riding is sacrificed, the seat is not spacious enough, the seat height is not enough, etc., so it is necessary to make further improvements.

Summary of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a foldable baby stroller which has a simple structure, is easy to use, has a small size after folding, and is comfortable and safe for children to ride in.

The object of the present invention is achieved in the following manner: a foldable baby stroller, characterized in that it comprises:

A rear support, a rear wheel is mounted on the bottom of the rear support, an armrest seat is mounted on the top of the rear support, a front armrest is hingedly mounted in the armrest seat, and the front armrest is hingedly connected to the front end of the seat cushion;

The middle part of the rear bracket is also hingedly installed with a reset seat and a positioning seat, the reset seat is located below the positioning seat, the front end of the positioning seat is hinged to the front bracket, the rear end of the positioning seat is hinged to the push rod, the bottom of the front bracket is equipped with a front wheel, the front end of the reset seat is hinged to the front bracket through a pulling arm, the rear end of the reset seat is equipped with a rear support rod, the top end of the rear support rod is provided with a rear hinge seat, and a positioning sleeve is hingedly installed in the rear hinge seat, the positioning sleeve is sleeved on the surface of the push rod and slides along the push rod;

A locking mechanism is installed in the positioning sleeve, which locks the relative position between the positioning sleeve and the push rod. A rear adjustment seat is also hingedly installed on the positioning sleeve, and the other end of the rear adjustment seat is hingedly installed on the backrest. The lower end of the backrest is hingedly installed on the seat cushion, and a sliding seat is arranged at the bottom of the backrest. A positioning groove is arranged on the side of the sliding seat facing the push rod, and the positioning groove is buckled in the sliding support on the push rod.

The locking mechanism comprises a locking pin slidably mounted in the positioning sleeve and a locking hole arranged on the push rod. The locking pin always moves toward the locking hole and is inserted into the locking hole under the push of a spring to lock the relative position between the positioning sleeve and the push rod.

The locking mechanism also includes a guide sleeve installed in the lock hole, the guide sleeve is fixed on the push rod through a base, a driving column is installed in the guide sleeve through a guide groove, and the locking pin is inserted into the lock hole through the guide sleeve, and its front end presses on the driving column.

A locking pin is also slidably arranged on the top of the positioning sleeve, and the bottom of the locking pin is pressed on the limiting platform on the top of the locking pin.

The locking mechanism also includes a handle rod sleeved in the push rod, and an elastic bead is arranged on the cylindrical surface of the handle rod. The elastic bead is selectively snapped into a plurality of gear holes on the push rod to adjust the relative distance between the push rod and the handle rod. A push block is also arranged on the cylindrical surface of the handle rod, and the push block is inclined with the bottom lower and the top higher. The push block pushes the driving column to move outward, forcing the locking pin to separate from the lock hole.

An unlocking button is installed at the tail of the handle rod, and the unlocking button is connected to a linkage seat arranged at the bottom of the handle rod through a driving rod. A driving seat is slidably installed in the linkage seat, and a first driving groove is obliquely arranged on the linkage seat. A second driving groove is arranged in the driving seat. The first driving groove and the second driving groove are slidably connected through a guide rod, and the elastic bead passes through the handle rod and is connected to the driving seat.

A reset torsion spring is installed on the reset seat, and two supporting legs of the torsion spring are respectively pressed against the reset seat and the rear bracket. The reset torsion spring drives the reset seat to always swing toward the rear wheel direction.

The rear adjustment seat comprises a lower sleeve with one end hinged to the positioning sleeve and an upper sleeve with one end hinged to the backrest. The lower sleeve is inserted into the upper sleeve, and a limiting device is arranged between the two sleeves.

The limiting device is a locking swing buckle provided on the cylindrical surface of the lower sleeve. The locking swing buckle is hingedly installed on the side wall of the upper sleeve when the swing arm swings. The locking swing buckle is snapped into a locking groove provided on the cylindrical surface of the lower sleeve and fixed, thereby locking the relative position between the upper sleeve and the lower sleeve.

The beneficial effects of the present invention are as follows: 1. The structure is simple, the production cost is low, and the market competitiveness is improved. 2. The seat cushion and backrest are supported by hard materials, so it is more comfortable to sit on compared with the traditional flexible seat. 3. The unique folding structure can realize one-key folding, which improves the convenience of folding. 4. After the stroller is folded, its rear wheels and headrest can be supported to stand on the ground, which is convenient for users to store.

BRIEF DESCRIPTION OF THE DRAWINGS

1, 2 and 3 are schematic diagrams of the child stroller of the present invention in use.

FIG. 4 is an enlarged view of the structure at point A in FIG. 2 of the present invention.

FIG. 5 is an assembly diagram of the rear adjustment seat structure of the present invention.

FIG. 6 is a structural assembly diagram of the locking mechanism of the present invention.

FIG. 7 is a cross-sectional view of the locking mechanism structure of the present invention.

FIG. 8 is an assembly diagram of the seat and backrest of the present invention.

FIG. 9 is an assembly diagram of the handle bar and the push rod in the present invention.

FIG. 10 is an assembly diagram of the unlocking button, the driving seat and the linkage seat in the present invention.

11 and 12 are schematic diagrams of the child stroller of the present invention in a folded state.

DETAILED DESCRIPTION

The present invention will be further described below in conjunction with the accompanying drawings.

A foldable baby stroller, characterized in that it comprises:

A rear support 1, a rear wheel 2 is mounted at the bottom of the rear support 1, an armrest seat 3 is mounted at the top of the rear support 1, a front armrest 31 is hingedly mounted in the armrest seat 3, and the front armrest 31 is hingedly connected to the front end of the seat cushion 4;

The middle part of the rear bracket 1 is also hingedly installed with a reset seat 5 and a positioning seat 6. The reset seat 5 is located below the positioning seat 6. The front end of the positioning seat 6 is hinged to the front bracket 7, and the rear end of the positioning seat 6 is hinged to the push rod 8. A front wheel 71 is installed at the bottom of the front bracket 7. The front end of the reset seat 5 is hinged to the front bracket 7 through a pulling arm 51. A rear support rod 52 is installed at the rear end of the reset seat 5. A rear hinged seat 53 is provided at the top of the rear support rod 52. A positioning sleeve 9 is hingedly installed in the rear hinged seat 53. The positioning sleeve 9 is sleeved on the surface of the push rod 8 and slides along the push rod 8.

A locking mechanism is installed in the positioning sleeve 9, which locks the relative position between the positioning sleeve 9 and the push rod 8. A rear adjustment seat 10 is also hingedly installed on the positioning sleeve 9, and the other end of the rear adjustment seat 10 is hingedly installed on the backrest 41. The lower end of the backrest 41 is hingedly installed on the seat cushion 4, and a sliding seat 42 is arranged at the bottom of the backrest 41. A positioning groove 43 is arranged on the side of the sliding seat 42 facing the push rod 8, and the positioning groove 43 is snapped into the sliding support on the push rod 8.

The locking mechanism includes a locking pin 91 slidably installed in the positioning sleeve 9 and a locking hole 92 set on the push rod 8. The locking pin 91 always moves toward the locking hole 92 and is inserted into the locking hole 92 under the push of the spring 93, thereby locking the relative position between the positioning sleeve 9 and the push rod 8.

The locking mechanism also includes a guide sleeve 94 installed in the lock hole 92, the guide sleeve 94 is fixed on the push rod 8 through a base, a drive column 96 is installed in the guide sleeve 94 through a guide groove 95, and the locking pin 91 is inserted into the lock hole 92 through the guide sleeve 94, and its front end is pressed on the drive column 96.

A locking pin 97 is also slidably provided on the top of the positioning sleeve 9 , and the bottom of the locking pin 97 is pressed on the limiting platform 98 on the top of the locking pin 91 .

The locking mechanism also includes a handle rod 81 sleeved in the push rod 8, and an elastic bead 82 is arranged on the cylindrical surface of the handle rod 81. The elastic bead 82 is selectively snapped into a plurality of gear holes 83 located on the push rod 8 to adjust the relative distance between the push rod 8 and the handle rod 81. A push block 84 is also arranged on the cylindrical surface of the handle rod 81. The push block 84 is inclined with the bottom lower and the top higher. The push block 84 pushes the driving column 96 to move outward, forcing the locking pin 91 to separate from the locking hole 92.

An unlocking button 85 is installed at the tail of the handle rod 81, and the unlocking button 85 is connected to a linkage seat 87 arranged at the bottom of the handle rod through a driving rod 86. A driving seat 88 is slidably installed in the linkage seat 87. A first driving groove 89 is obliquely arranged on the linkage seat 87, and a second driving groove 891 is arranged in the driving seat 88. The first driving groove 89 and the second driving groove 891 are slidably connected through a guide rod 892, and the elastic bead 82 passes through the handle rod and is connected to the driving seat 88.

A reset torsion spring 54 is installed on the reset seat 5 , and two supporting legs of the torsion spring are pressed against the reset seat 5 and the rear bracket 1 respectively. The reset torsion spring 54 drives the reset seat 5 to always swing toward the rear wheel 2 .

The rear adjustment seat 10 includes a lower sleeve 11 hinged to the positioning sleeve 9 at one end, and an upper sleeve 12 hinged to the backrest 41 at one end. The lower sleeve 11 is inserted into the upper sleeve 12, and a limiting device is arranged between the two sleeves.

The limiting device is a locking swing buckle 13 provided on the cylindrical surface of the lower sleeve 11. The locking swing buckle 13 is hingedly installed on the side wall of the upper sleeve 12 when the swing arm 15 swings. The locking swing buckle 13 is snapped into a locking groove 14 provided on the cylindrical surface of the lower sleeve 11 and fixed, thereby locking the relative position between the upper sleeve 12 and the lower sleeve 11.

Working principle: As shown in Figures 1 and 2, when the stroller is in use, the locking pin in the positioning sleeve passes through the positioning sleeve and is inserted into the locking hole of the push rod, locking the relative position between the positioning sleeve and the push rod. At this time, a triangular support assembly is formed between the push rod 8, the rear support rod 52 and the rear bracket, and the rear bracket, the front bracket and the pull arm 51 also form a triangular support assembly, which plays a supporting role for the seat cushion and the backrest, and the stroller is in a normal pushing and using state.

As shown in Figs. 9 and 10, when the baby carriage needs to be folded, the user pulls up the locking pin 97, and the bottom of the locking pin 97 separates from the limit platform 98 at the top of the locking pin 91, releasing the limit of the rearward movement of the locking pin. Then, the unlocking button 85 at the tail of the handle bar 81 is pressed, and the unlocking button 85 pushes the linkage seat 87 downward through the driving rod 86, and the first driving groove on the linkage seat and its inner guide rod 892 are used to squeeze the second driving groove on the driving seat. By utilizing the interaction between the first and second driving grooves, the driving seat is forced to sink downward, and the elastic bead 82 is forced to disengage from the shift hole 83 on the push rod 8. The user can then press the handle bar 81 downward. When the handle bar 81 is pushed down to the right position, the push block 84 on the cylindrical surface of the handle bar 81 pushes the driving column 96 to move outward. When the driving column moves outward, the locking pin 91 is forced to separate from the locking hole 92, releasing the lock between the positioning sleeve 9 and the push rod 8, and the positioning sleeve can slide on the push rod. At this time, the reset torsion spring 54 on the positioning seat 5 drives the reset seat 5 to always deflect toward the rear wheel 2, and the weight of the baby stroller itself generates folding power. The rear support rod 52 and the push rod 8 drive the backrest to tilt toward the rear wheel, and the pull arm 51 pulls the front bracket to tilt toward the rear wheel, and finally the baby stroller is folded. Among them, due to the setting of the reset torsion spring 54, once the user presses down the handle bar to release the lock of the positioning sleeve, the reset torsion spring can drive the stroller to fold automatically with the help of the stroller's own weight, which greatly improves the convenience of folding.

As shown in Figures 4 and 5, when the backrest in this case is folded, the locking swing buckle 13 is pulled inward to force it to separate from the locking groove 14 on the cylindrical surface of the lower sleeve 11. At this time, the upper sleeve 12 loses its supporting force. Under the gravity of the backrest, the upper sleeve 12 moves toward the sleeve 11, so that the entire backrest swings toward the rear wheel to further reduce the volume of the baby stroller after folding. Similarly, during use, the backrest angle can be adjusted by selecting the docking or separation of the locking swing buckle 13 and the locking groove 14, so as to meet the user's selection needs for the backrest angle.

When the user needs to use the stroller again, he only needs to do the reverse operation, lift the handle bar upwards, use the weight of the stroller to force the positioning sleeve to reset, reinsert the locking pin 91 into the lock hole 92 to lock it, and re-engage the locking swing buckle 13 and the locking groove 14. Compared with the traditional technology, the stroller in this case uses a hard support seat cushion and backrest, so it is more comfortable to ride than the traditional flexible seat. At the same time, the unique folding structure can achieve one-button folding, which improves the convenience of folding. In addition, after the stroller is folded, its rear wheels and headrest can be supported on the ground to stand, which is convenient for users to store, so it can be widely promoted and used.

The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims (7)

1. A folding child stroller, characterized in that: it comprises the following steps:

The seat cushion comprises a rear bracket (1), wherein a rear wheel (2) is arranged at the bottom of the rear bracket (1), a handrail seat (3) is arranged at the top of the rear bracket (1), a front handrail (31) is hinged in the handrail seat (3), and the front handrail (31) is hinged with the front end of the seat cushion (4);

The middle part of the rear support (1) is also hinged with a reset seat (5) and a positioning seat (6), the reset seat (5) is positioned below the positioning seat (6), the front end of the positioning seat (6) is hinged with a front support (7), the rear end of the positioning seat (6) is hinged with a push rod (8), the bottom of the front support (7) is provided with a front wheel (71), the front end of the reset seat (5) is hinged with the front support (7) through a pull arm (51), the rear end of the reset seat (5) is provided with a rear stay bar (52), the top end of the rear stay bar (52) is provided with a rear hinge seat (53), a positioning sleeve (9) is hinged in the rear hinge seat (53), and the positioning sleeve (9) is sleeved on the surface of the push rod (8) and slides along the push rod (8);

The novel seat is characterized in that a locking mechanism is arranged in the positioning sleeve (9), the locking mechanism locks the relative position between the positioning sleeve (9) and the push rod (8), the positioning sleeve (9) is also hinged with a rear adjusting seat (10), the other end of the rear adjusting seat (10) is hinged with a backrest (41), the lower end of the backrest (41) is hinged with a seat cushion (4), a sliding seat (42) is arranged at the bottom of the backrest (41), one side of the sliding seat (42) facing the push rod (8) is provided with a positioning groove (43), and the positioning groove (43) is buckled on the push rod (8) to be supported in a sliding way;

the locking mechanism comprises a lock pin (91) which is installed in the positioning sleeve (9) in a sliding manner and a lock hole (92) which is arranged on the push rod (8), the lock pin (91) always moves towards the lock hole (92) under the pushing of the spring (93) and is inserted into the lock hole (92), and the relative position between the positioning sleeve (9) and the push rod (8) is locked;

And a reset torsion spring (54) is arranged on the reset seat (5), two supporting legs of the torsion spring respectively support against the reset seat (5) and the rear bracket (1), and the reset torsion spring (54) drives the reset seat (5) to always deflect towards the direction of the rear wheel (2).

2. A folding child stroller according to claim 1, wherein: the locking mechanism also comprises a guide sleeve (94) arranged in the lock hole (92), the guide sleeve (94) is fixed on the push rod (8) through a base, a driving column (96) is arranged in the guide sleeve (94) through a guide groove (95), the lock pin (91) is inserted into the lock hole (92) through the guide sleeve (94), and the front end of the lock pin is propped against the driving column (96).

3. A folding child stroller according to claim 1, wherein: the top of the locating sleeve (9) is also provided with a locking pin (97) in a sliding mode, and the bottom of the locking pin (97) is pressed on a limiting table (98) at the top of the lock pin (91).

4. A folding child stroller according to claim 1, wherein: the locking mechanism also comprises a handle rod (81) sleeved in the push rod (8), an elastic bead (82) is arranged on the cylindrical surface of the handle rod (81), the elastic bead (82) is selectively buckled in a plurality of gear holes (83) formed in the push rod (8), the relative distance between the push rod (8) and the handle rod (81) is adjusted, a push block (84) is further arranged on the cylindrical surface of the handle rod (81), the push block (84) is in a lower-upper-high inclined shape, and the push block (84) pushes the driving column (96) to move outwards to force the lock pin (91) to be separated from the lock hole (92).

5. A folding child stroller according to claim 4, wherein: the handle is characterized in that an unlocking button (85) is arranged at the tail of the handle rod (81), the unlocking button (85) is connected with a linkage seat (87) arranged at the bottom of the handle rod through a driving rod (86), a driving seat (88) is slidably arranged in the linkage seat (87), a first driving groove (89) is obliquely arranged on the linkage seat (87), a second driving groove (891) is arranged in the driving seat (88), the first driving groove (89) is slidably connected with the second driving groove (891) through a guide rod (892), and an elastic bead (82) penetrates through the handle rod to be connected with the driving seat (88).

6. A folding child stroller according to claim 1, wherein: the rear adjusting seat (10) comprises a lower sleeve (11) with one end hinged with the positioning sleeve (9) and an upper sleeve (12) with one end hinged with the backrest (41), wherein the lower sleeve (11) is inserted into the upper sleeve (12), and a limiting device is arranged between the two sleeves.

7. A folding child stroller according to claim 6, wherein: the limiting device is a locking swing buckle (13) arranged on the cylindrical surface of the lower sleeve (11), the locking swing buckle (13) is hinged to the side wall of the upper sleeve (12) when the swing arm (15) swings, the locking swing buckle (13) is buckled into a locking groove (14) arranged on the cylindrical surface of the lower sleeve (11) to be fixed in a locking mode, and the relative position between the upper sleeve (12) and the lower sleeve (11) is locked.