A baby stroller

Abstract

The present invention discloses a baby stroller, whose frame comprises a push rod assembly, a front bracket assembly, a rear bracket assembly, a mounting seat, a linkage frame, a rotating seat and a bottom connecting rod; the lower end of the push rod assembly is rotatably connected to the mounting seat, the front bracket assembly is mounted on the front side of the mounting seat and can be folded left and right relative to the mounting seat, and the rear bracket assembly is mounted on the rear side of the mounting seat and can be folded left and right and rotated front and back relative to the mounting seat; the upper part of the linkage frame is rotatably connected to the push rod assembly, and the rotating seat is rotatably connected to the lower part of the linkage frame, and the left and right sides of the rotating seat are respectively rotatably connected with sliding sleeves that slidably cooperate with the front bracket assembly, the front end of the bottom connecting rod is rotatably connected to the rotating seat, and the rear end of the bottom connecting rod is rotatably connected to the rear bracket assembly; when the present invention is folded, the front and rear bracket assemblies can be folded left and right, reducing the lateral distance, so that the volume of the frame is smaller after folding.

Description

Technical Field

[0001] The present invention relates to the technical field of baby strollers, and in particular to a brake mechanism of a baby stroller. Background Art

[0002] A baby stroller is a "transportation tool" for babies, which requires someone to help push or pull it. With the continuous development of society, the probability of people traveling or playing with babies is increasing, so portable baby strollers that can be folded quickly have emerged.

[0003] There are many types of existing baby stroller frames, with different numbers of rods, different connection relationships and connection positions between the rods, and thus different folding principles and folding methods. However, the existing baby strollers are still large in size after folding, and cannot be stored in a small space, and it is difficult to meet people's increasing demand for small-volume foldable baby strollers. Summary of the invention

[0004] The purpose of the present invention is to provide a brake mechanism for a baby stroller to solve the problem that the existing baby stroller has a large volume after being folded.

[0005] The technical solution of the present invention is: a baby stroller, comprising a frame and a locking mechanism for locking the frame in an unfolded position, the frame comprising a push rod assembly, a front bracket assembly with a front wheel assembly below, and a rear bracket assembly with a rear wheel assembly below, the frame also comprising a mounting seat, a linkage frame, a swivel seat and a bottom connecting rod; the lower end of the push rod assembly is rotatably connected to the mounting seat, the front bracket assembly is mounted on the front side of the mounting seat and can be folded left and right relative to the mounting seat, the rear bracket assembly is mounted on the rear side of the mounting seat and can be folded left and right and rotatable forward and backward relative to the mounting seat; the upper part of the linkage frame is rotatably connected to the push rod assembly, the swivel seat is rotatably connected to the lower part of the linkage frame, the left and right sides of the swivel seat are respectively rotatably connected with sliding sleeves that slidably cooperate with the front bracket assembly, the front end of the bottom connecting rod is rotatably connected to the swivel seat, and the rear end of the bottom connecting rod is rotatably connected to the rear bracket assembly;

[0006] When the frame is folded, the push rod assembly drives the rotating seat to move forward through the linkage frame, and the rotating seat drives the front bracket assembly to fold left and right through the sliding sleeves movably connected on both sides and the sliding cooperation with the front bracket assembly, and at the same time drives the rear bracket assembly to rotate forward relative to the mounting seat and fold left and right through the bottom connecting rod.

[0007] Furthermore, the front bracket assembly includes two front support rods which are symmetrically arranged on the left and right and are arranged in an eight-shaped shape when unfolded, and a front folding rod which is arranged between the front parts of the two front support rods and can be folded and retracted to the left and right; the rear ends of the two front support rods are respectively rotatably connected to the mounting seats; the sliding sleeves on both sides of the rotating seat are respectively slidably matched with the above-mentioned two front support rods; the front bracket assembly is folded to the left and right by the rotational cooperation between the front support rods and the mounting seat.

[0008] Among them, the front folding rod is a two-section folding rod, which includes a left front rod and a right front rod. The outer ends of the left front rod and the right front rod are respectively rotatably connected to the front support rods on both sides, and the inner end of the left front rod is rotatably connected to the inner end of the right front rod.

[0009] Furthermore, the rear bracket assembly includes two rear support rods which are symmetrically arranged on the left and right and are arranged in an eight-shaped shape when unfolded, and a rear folding rod which is arranged between the rear parts of the two rear support rods and can be folded and retracted to the left and right; the mounting seat has extension parts extending rearward and downward and outward on both sides; the front ends of the two rear support rods are rotatably connected to the extension parts on both sides of the mounting seat, respectively, and the rotation axes of the rear support rods and the corresponding extension parts are arranged obliquely to the extension direction of the extension parts. When the rear bracket assembly rotates forward relative to the mounting seat, the two rear support rods automatically retract inward laterally to achieve the left and right folding of the rear bracket assembly.

[0010] Wherein, the rear folding rod is a two-section folding rod, which includes a left rear rod and a right rear rod, the outer ends of the left rear rod and the right rear rod are respectively rotatably connected to the rear support rods on both sides, and the inner end of the left rear rod is rotatably connected to the inner end of the right rear rod.

[0011] Furthermore, the push rod assembly includes a connecting portion located at the bottom and connected to the mounting seat for forward and backward rotation, and side push rods located at the left and right sides and capable of bending forward relative to the connecting portion.

[0012] Furthermore, a push handle assembly is rotatably connected to the top of the push rod assembly; the push handle assembly includes side push handles rotatably connected to the upper ends of the side push rods, and a middle push handle arranged between the two side push handles, and the side push handles can be bent forward relative to the middle push handle.

[0013] Furthermore, the linkage frame includes a crossbar rotatably matched with the rotating seat, and side rods located on both sides of the crossbar and rotatably connected to the crossbar and bendable forward. The linkage frame is rotatably connected to the side push rods of the push rod assembly through the upper ends of the side rods.

[0014] Furthermore, the locking mechanism includes a first locking mechanism arranged between the rotating seat and the mounting seat, and a second locking mechanism arranged between the push handle assembly and the push rod assembly.

[0015] The advantages of the present invention are as follows: when the frame is folded, the push rod assembly flipped forward drives the rotating seat to move forward through the linkage frame, and the rotating seat drives the front bracket assembly to fold left and right through the sliding sleeves movably connected on both sides and the sliding cooperation with the front bracket assembly, and at the same time drives the rear bracket assembly to rotate forward and fold left and right relative to the mounting seat through the bottom connecting rod; in addition, during the folding process, the two sides of the push rod assembly are bent forward, and the two sides of the push rod assembly and the linkage frame will bend accordingly under the connection relationship; the structure of the present invention is relatively novel, and when folded, not only the height and front-to-back length of the whole vehicle can be greatly reduced, but also the front bracket assembly and the rear bracket assembly can be folded left and right, the push rod assembly and the two sides of the push rod assembly can be bent and folded, and the lateral distance can be reduced, so that after the frame is folded, the various components are tightly fitted, the volume is small, and it is convenient for storage, storage and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. The accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention when it is in use;

[0018] Figure 2 for Figure 1 A schematic diagram of the side structure of

[0019] Figure 3 A schematic diagram of the structure of the handle assembly in the present invention during folding after being unlocked;

[0020] Figure 4 for Figure 3 A schematic diagram of the side structure of

[0021] Figure 5 A schematic diagram of the structure of the present invention in the folding process;

[0022] Figure 6 for Figure 5 A schematic diagram of the side structure of

[0023] Figure 7 , Figure 8 , Fig. 9 It is a schematic diagram of the three-dimensional structure of the present invention when it is in a folded state.

[0024] Among them: 1 push rod assembly; 1-1 connecting part; 1-2 side push rod; 2 front bracket assembly; 2-1 front support rod; 2-2 front folding rod; 2-2-1 left front rod; 2-2-2 right front rod; 3 rear bracket assembly; 3-1 rear support rod; 3-2 rear folding rod; 3-2-1 left rear rod; 3-2-2 right rear rod; 4 front wheel assembly; 5 rear wheel assembly; 6 mounting seat; 6-1 extension part; 7 linkage frame; 7-1 cross bar; 7-2 side rod; 8 rotating seat; 9 bottom connecting rod; 10 sliding sleeve; 11 push handle assembly; 11-1 side push handle; 11-2 middle push handle. DETAILED DESCRIPTION

[0025] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present invention and are not limited to the scope of the present invention. The implementation conditions adopted in the examples can be further adjusted according to specific conditions, and the unspecified implementation conditions are usually the conditions in routine experiments.

[0026] like Figures 1 to 9 As shown, a baby stroller comprises a frame and a locking mechanism for locking the frame in an unfolded position, the frame comprises a push rod assembly 1, a front bracket assembly 2 with a front wheel assembly 4 at the bottom, a rear bracket assembly 3 with a rear wheel assembly 5 at the bottom, a mounting seat 6, a linkage frame 7, a rotating seat 8 and a bottom connecting rod 9; the lower end of the push rod assembly 1 is rotatably connected to the mounting seat 6 in the front and rear directions, the front bracket assembly 2 is mounted on the front side of the mounting seat 6 and can be folded left and right relative to the mounting seat 6, and the rear bracket assembly 3 is mounted on the rear side of the mounting seat 6 and can be folded left and right and rotated front and back relative to the mounting seat 6; the upper part of the linkage frame 7 is rotatably connected to the push rod assembly 1, the rotating seat 8 is rotatably connected to the lower part of the linkage frame 7, the left and right sides of the rotating seat 8 are respectively rotatably connected with sliding sleeves 10 that slide with the front bracket assembly 2, the front end of the bottom connecting rod 9 is rotatably connected to the rotating seat 8, and the rear end of the bottom connecting rod 9 is rotatably connected to the rear bracket assembly 3.

[0027] The specific structure and installation method of the front bracket assembly 2 are as follows: the front bracket assembly 2 includes two front support rods 2-1 which are symmetrically arranged on the left and right and are arranged in an eight-shaped shape with a wide front and a narrow rear when unfolded, and a front folding rod 2-2 which is arranged between the front parts of the two front support rods 2-1 and can be folded and retracted to the left and right; the rear ends of the two front support rods 2-1 are respectively rotatably connected to the mounting seat 6; the sliding sleeves 10 on both sides of the rotating seat 8 are respectively slidably matched with the above-mentioned two front support rods 2-1; the front bracket assembly 2 is retracted to the left and right by the rotational cooperation between the front support rods 2-1 and the mounting seat 6.

[0028] Among them, the front folding rod 2-2 is a two-section folding rod, which includes a left front rod 2-2-1 and a right front rod 2-2-2. The outer ends of the left front rod 2-2-1 and the right front rod 2-2-2 are rotatably connected to the front support rods 2-1 on both sides respectively, and the inner end of the left front rod 2-2-1 is rotatably connected to the inner end of the right front rod 2-2-2.

[0029] The specific structure and installation method of the rear bracket assembly 3 are as follows: the rear bracket assembly 3 includes two rear support rods 3-1 which are symmetrically arranged and are arranged in an eight-shaped shape when unfolded, and a rear folding rod 3-2 which is arranged between the rear parts of the two rear support rods 3-1 and can be folded and retracted to the left and right; both sides of the mounting seat 6 have extension parts 6-1 extending backward and downward and outward; the front ends of the two rear support rods 3-1 are rotatably connected to the extension parts 6-1 on both sides of the mounting seat 6, respectively, and the rotation axes of the rear support rods 3-1 and the corresponding extension parts 6-1 are arranged obliquely to the extension direction of the extension parts 6-1, so that when the rear bracket assembly 3 rotates forward relative to the mounting seat 6, the two rear support rods 3-1 are automatically retracted laterally inward to achieve the left and right retraction of the rear bracket assembly 3.

[0030] Among them, the rear folding rod 3-2 is a two-section folding rod, which includes a left rear rod 3-2-1 and a right rear rod 3-2-2. The outer ends of the left rear rod 3-2-1 and the right rear rod 3-2-2 are rotatably connected to the rear support rods 3-1 on both sides respectively, and the inner end of the left rear rod 3-2-1 is rotatably connected to the inner end of the right rear rod 3-2-2.

[0031] In this embodiment, the top of the push rod assembly 1 is connected to a push handle assembly 11 for forward and backward rotation. Through the two-stage structure, the volume of the entire vehicle after folding can be greatly reduced without affecting the pushing height. This structure is a common structure in the field, so it will not be described in detail or limited by the structure.

[0032] In this embodiment, the specific structure of the push rod assembly 1 is that the push rod assembly 1 includes a connecting part 1-1 located at the bottom and connected to the mounting seat 6 for forward and backward rotation, and a side push rod 1-2 located on the left and right sides and can be bent forward relative to the connecting part 1-1.

[0033] In this embodiment, the specific structure of the push handle assembly 11 is as follows: the push handle assembly 11 includes side push handles 11-1 respectively connected to the upper ends of the side push rods 1-2 for forward and backward rotation, and a middle push handle 11-2 rotatably arranged between the two side push handles 11-1, and the side push handles 11-1 can be bent forward relative to the middle push handle 11-2.

[0034] In this embodiment, the linkage frame 7 includes a cross bar 7-1 that is rotatably matched with the rotating seat 8, and side bars 7-2 that are located on both sides of the cross bar 7-1 and are rotatably connected to the cross bar 7-1 and can be bent forward. The linkage frame 7 is rotatably connected to the side push rod 1-2 of the push rod assembly 1 through the upper end of the side rod 7-2.

[0035] The structural design of the push rod assembly 1, the push handle assembly 11 and the linkage frame 7 with bendable sides can further reduce the left-right distance of the whole vehicle after folding, and further reduce the folding volume.

[0036] In this embodiment, the locking mechanism includes a first locking mechanism arranged between the rotating seat 8 and the mounting seat 6, and a second locking mechanism arranged between the push handle assembly 11 and the push rod assembly 1. When the baby stroller is in the unfolded state, the first locking mechanism and the second locking mechanism lock the baby stroller to ensure that the baby stroller can be used normally. The above-mentioned first locking mechanism and the second locking mechanism are both commonly used locking structures in the art, so their structures are not described in detail. It should be noted that as long as the structure can meet the requirements of locking and unlocking the entire baby stroller, it can be the locking mechanism of this embodiment.

[0037] Furthermore, the second locking mechanism and the first locking mechanism may preferably be a linkage locking structure, that is, when the push handle assembly 11 and the push rod assembly 1 are folded and retracted, the first locking mechanism is automatically unlocked. Since the linkage locking structure is a common structure in the art and the linkage method is diverse, no further description or structural limitation is given.

[0038] When the frame is in the unfolded position, the mounting point of the push rod assembly 1 and the mounting seat 6 is located above and behind the mounting point of the front bracket assembly 2 and the mounting seat 6, and the mounting point of the rear bracket assembly 3 and the mounting seat 6 is located below and behind the mounting point of the front bracket assembly 2 and the mounting seat 6 and the mounting point of the push rod assembly 1 and the mounting seat 6. The linkage frame 7 is arranged with a low front and a high rear, and the bottom link 9 is arranged with a high front and a low rear, and the sliding sleeve 10 and the rotating seat 8 are located at the rear of the front bracket assembly 1.

[0039] When the frame is folded, first release the lock of the second locking mechanism, then flip the push handle assembly 11 backward, release the lock of the first locking mechanism, and then flip the push rod assembly 1 forward. The push rod assembly 1 drives the rotating seat 8 to move forward through the linkage frame 7. The rotating seat 8 drives the front bracket assembly 2 to fold left and right through the sliding sleeves 10 movably connected on both sides and the sliding cooperation with the front bracket assembly 2. At the same time, the rear bracket assembly 3 is driven to rotate forward and fold left and right relative to the mounting seat 6 through the bottom connecting rod 9. In addition, the two sides of the push handle assembly 11 are bent forward, and the two sides of the push rod assembly 1 and the linkage frame 7 are bent accordingly in the connection relationship, further reducing the left and right distance of the whole vehicle after folding, and further reducing the folding volume.

[0040] The structure of the present invention is relatively novel. When folded, not only can the height and front-to-rear length of the entire vehicle be greatly reduced, but the front bracket assembly 2 and the rear bracket assembly 3 can also be folded left and right, and the push rod assembly 1, the push rod assembly 11 and the two sides of the linkage frame 7 are bent and folded to reduce the lateral distance, so that the various components of the frame are closely fitted after folding, the volume is small, and it is convenient for storage, storage and transportation.

[0041] The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

Claims

1. A baby stroller, comprising a frame and a locking mechanism for locking the frame in an unfolded position, the frame comprising a push rod assembly (1), a front support assembly (2) with a front wheel assembly (4) disposed below, and a rear support assembly (3) with a rear wheel assembly (5) disposed below, characterized in that: The frame further comprises a mounting seat (6), a linkage frame (7), a rotating seat (8) and a bottom connecting rod (9); the lower end of the push rod assembly (1) is rotatably connected to the mounting seat (6); the front bracket assembly (2) is mounted on the front side of the mounting seat (6) and can be retracted leftward and rightward relative to the mounting seat (6); the rear bracket assembly (3) is mounted on the rear side of the mounting seat (6) and can be retracted leftward and rightward and rotated forward and backward relative to the mounting seat (6); the upper part of the linkage frame (7) is rotatably connected to the push rod assembly (1); the rotating seat (8) is rotatably connected to the lower part of the linkage frame (7); the left and right sides of the rotating seat (8) are respectively rotatably connected to sliding sleeves (10) that are slidably matched with the front bracket assembly (2); the front end of the bottom connecting rod (9) is rotatably connected to the rotating seat (8); the rear end of the bottom connecting rod (9) is rotatably connected to the rear bracket assembly (3); When the frame is folded, the push rod assembly (1) drives the rotating seat (8) to move forward through the linkage frame (7), and the rotating seat (8) drives the front bracket assembly (2) to be folded to the left and right through the sliding sleeves (10) movably connected on both sides, and at the same time drives the rear bracket assembly (3) to rotate forward relative to the mounting seat (6) and to be folded to the left and right through the bottom connecting rod (9).

2. A baby stroller according to claim 1, characterized in that: The front support assembly (2) comprises two front support rods (2-1) which are symmetrically arranged and arranged in an eight-shaped shape when unfolded, with the front being wider than the rear, and a front folding rod (2-2) which is arranged between the front parts of the two front support rods (2-1) and can be folded and retracted in the left and right directions; the rear ends of the two front support rods (2-1) are respectively rotatably connected to the mounting seat (6); the sliding sleeves (10) on both sides of the rotating seat (8) are respectively slidably matched with the two front support rods (2-1); the front support assembly (2) is folded in the left and right directions by the rotational match between the front support rods (2-1) and the mounting seat (6).

3. A baby stroller according to claim 2, characterized in that: The front folding rod (2-2) is a two-section folding rod, comprising a left front rod (2-2-1) and a right front rod (2-2-2), the outer ends of the left front rod (2-2-1) and the right front rod (2-2-2) being rotatably connected to the front support rods (2-1) on both sides respectively, and the inner end of the left front rod (2-2-1) is rotatably connected to the inner end of the right front rod (2-2-2).

4. A baby stroller according to claim 1, characterized in that: The rear support assembly (3) comprises two rear support rods (3-1) which are symmetrically arranged and arranged in an eight-shaped shape when unfolded, and a rear folding rod (3-2) which is arranged between the rear parts of the two rear support rods (3-1) and can be folded and retracted in the left and right directions; the two sides of the mounting seat (6) have extension parts (6-1) extending backward and downward and outward; the front ends of the two rear support rods (3-1) are respectively rotatably connected to the extension parts (6-1) on both sides of the mounting seat (6), and the rotation axes of the rear support rods (3-1) and the corresponding extension parts (6-1) are arranged obliquely to the extension direction of the extension parts (6-1); when the rear support assembly (3) rotates forward relative to the mounting seat (6), the two rear support rods (3-1) are automatically retracted inwardly in the horizontal direction, so that the rear support assembly (3) can be retracted in the left and right directions.

5. A baby stroller according to claim 4, characterized in that: The rear folding rod (3-2) is a two-section folding rod, comprising a left rear rod (3-2-1) and a right rear rod (3-2-2), the outer ends of the left rear rod (3-2-1) and the right rear rod (3-2-2) being rotatably connected to the rear support rods (3-1) on both sides respectively, and the inner end of the left rear rod (3-2-1) is rotatably connected to the inner end of the right rear rod (3-2-2).

6. A baby stroller according to claim 1, characterized in that: The locking mechanism comprises a first locking mechanism arranged between the rotating seat (8) and the mounting seat (6).

7. The baby stroller according to claim 1, characterized in that: The push rod assembly (1) comprises a connecting portion (1-1) located at the bottom and connected to the mounting seat (6) for forward and backward rotation, and side push rods (1-2) located at the left and right sides and capable of bending forward relative to the connecting portion (1-1).

8. A baby stroller according to claim 7, characterized in that: A push handle assembly (11) is rotatably connected to the top of the push rod assembly (1); the push handle assembly (11) comprises side push handles (11-1) rotatably connected to the upper ends of the side push rods (1-2), and a middle push handle (11-2) arranged between the two side push handles (11-1), wherein the side push handles (11-1) can be bent forward relative to the middle push handle (11-2).

9. A baby stroller according to claim 8, characterized in that: The locking mechanism comprises a second locking mechanism arranged between the push handle assembly (11) and the push rod assembly (1).

10. The baby stroller according to claim 7, characterized in that: The linkage frame (7) comprises a cross bar (7-1) rotatably matched with a rotating seat (8), and side bars (7-2) located on both sides of the cross bar (7-1) and rotatably connected to the cross bar (7-1) and bent forward. The linkage frame (7) is rotatably connected to the side push rods (1-2) of the push rod assembly (1) via the upper ends of the side bars (7-2).

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