Folding stroller

Abstract

The present invention discloses a folding baby stroller, wherein the chassis comprises a first chassis and a second chassis which are rotatably connected to each other on the inner side, the baby stroller further comprises a first side frame rotatably connected to the outer side of the first chassis, a second side frame rotatably connected to the outer side of the second chassis, a first wheel assembly rotatably connected to the first chassis, and a second wheel assembly rotatably connected to the second chassis, a first connecting assembly is arranged between the chassis and the first wheel assembly, and a second connecting assembly is arranged between the chassis and the second wheel assembly, during the transition of the baby stroller from an open state to a folded state, the first chassis and the second chassis rotate and move closer to each other, the first wheel assembly and the second wheel assembly are driven by the first connecting assembly and the second connecting assembly respectively and move closer to the first chassis and the second chassis, and the first side frame and the second side frame move closer to the first chassis and the second chassis respectively. After the folding baby stroller is folded, the whole vehicle is flat, which greatly reduces the occupied space, and is very convenient to store and carry.

Description

Technical Field

[0001] The invention relates to a foldable baby carriage. Background Art

[0002] A baby stroller is a commonly used means of transportation for children. The structure of a baby stroller includes a chassis, wheels connected to the bottom of the chassis, and side frames connected to the chassis. The side frames and the chassis together form a storage space, and children can sit or lie on the chassis. The baby stroller with this structure can be towed or pushed. A handle can be set, and the side frame can also be used as a handle when towing or pushing. Most of the baby strollers of this type on the market cannot be folded. Some of them can be folded, but they are large in size after folding, which takes up space for storage and is inconvenient to carry. Summary of the invention

[0003] In order to solve the above problems, an object of the present invention is to provide a foldable baby stroller.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: a foldable baby stroller, which has an open state and a folded state, the foldable baby stroller includes a chassis, the chassis includes a first chassis and a second chassis that are rotatably connected to each other on the inner sides, the foldable baby stroller also includes a first side frame rotatably connected to the outer side of the first chassis, a second side frame rotatably connected to the outer side of the second chassis, a first wheel assembly rotatably connected to the first chassis, and a second wheel assembly rotatably connected to the second chassis, a first connecting assembly is provided between the chassis and the first wheel assembly, and a second connecting assembly is provided between the chassis and the second wheel assembly.

[0005] During the transition of the foldable baby stroller from the open state to the folded state, the first base frame and the second base frame rotate relative to each other and move closer together, the first wheel assembly and the second wheel assembly are respectively driven by the first connecting assembly and the second connecting assembly to move closer together with the first base frame and the second base frame, and the first side frame and the second side frame are respectively moved closer together with the first base frame and the second base frame.

[0006] Furthermore, the first connecting assembly and the second connecting assembly are also connected to the first side frame and the second side frame respectively. During the transition of the folding stroller from the open state to the folded state, the first side frame and the second side frame are respectively driven by the first connecting assembly and the second connecting assembly to move closer to the first base frame and the second base frame.

[0007] Furthermore, the first connecting assembly includes a first sliding frame slidably connected to the first base frame, a first connecting rod rotatably connected to the second base frame at one end and rotatably connected to the first sliding frame at the other end, a first spiral groove is provided on the first wheel assembly, and the first sliding frame has a first driving member slidably connected to the first spiral groove;

[0008] The second connecting assembly includes a second sliding frame slidably connected to the second base frame, a second connecting rod rotatably connected to the first base frame at one end and rotatably connected to the second sliding frame at the other end, a second spiral groove is provided on the second wheel assembly, and the second sliding frame has a second driving member slidably connected to the second spiral groove.

[0009] Furthermore, the first wheel assembly includes a first sleeve pivotally connected to the first base frame, a first joint connected to the first sleeve, and a first wheel rotatably connected to the first joint, and the first spiral groove is provided on the first sleeve;

[0010] The second wheel assembly comprises a second sleeve pivotally connected to the second base frame, a second joint connected to the second sleeve, and a second wheel rotatably connected to the second joint. The second spiral groove is arranged on the second sleeve.

[0011] Furthermore, when the folding stroller is in an open state, the first joint and the first wheel are located below the first base frame, and the second joint and the second wheel are located below the second base frame; when the folding stroller is in a folded state, the first joint and the first wheel are retracted inside the first base frame, and the second joint and the second wheel are retracted inside the second base frame.

[0012] Furthermore, the rotation axis between the first wheel assembly and the first chassis, and the rotation axis between the second wheel assembly and the second chassis are both perpendicular to the rotation axes of the wheels in the first wheel assembly and the second wheel assembly.

[0013] Furthermore, the first connecting assembly also includes a first side connecting rod having one end rotationally connected to the first sliding frame and the other end rotationally connected to the first side frame; the second connecting assembly also includes a second side connecting rod having one end rotationally connected to the second sliding frame and the other end rotationally connected to the second side frame.

[0014] Furthermore, when the folding stroller is in the open state, the first connecting rod, the first base frame, the first sliding frame, the second connecting rod, the second base frame, and the second sliding frame are all arranged in parallel; when the folding stroller is in the folded state, the first connecting rod and the second connecting rod are both perpendicular to the first base frame and the first sliding frame, and perpendicular to the second base frame and the second sliding frame.

[0015] Furthermore, a first adapter portion is provided on the inner side of the first base frame, and a second adapter portion is provided on the inner side of the second base frame. Both the first adapter portion and the second adapter portion are bow-shaped and are superior arc bows. The first adapter portion and the second adapter portion are rotationally connected to each other, and the first connecting rod and the second connecting rod are rotationally connected to the second adapter portion and the first adapter portion respectively. A plane is provided that is perpendicular to the rotation axis of the first adapter portion and the second adapter portion, and the projections of the circle where the first adapter portion and the circle where the second adapter portion are located on the plane coincide with each other. The rotation axis between the first adapter portion and the second adapter portion is located at the center of the circles where the two portions are located. When the folding stroller is in a folded state, the projections of the first adapter portion and the second adapter portion on the plane coincide with each other.

[0016] Furthermore, an arc-shaped limit groove is formed on one of the first adapter part and the second adapter part, and a limit pin slidably connected to the limit groove is fixedly provided in the other one. When the folding baby stroller is in the open state, the limit pin abuts against the groove wall at one end of the limit groove.

[0017] Furthermore, there are two first wheel assemblies, two second wheel assemblies, two first connecting rods, and two second connecting rods, which are respectively arranged on the left and right sides of the foldable baby stroller.

[0018] Due to the adoption of the above technical solution, the foldable children's stroller has a structural design in which, after folding, the two bottom frames are folded relative to each other, and the two side frames and the bottom frame are brought close to each other. At the same time, driven by the connecting assembly, the wheels are turned over and brought close to the chassis, and the entire vehicle is flat, which greatly reduces the occupied space and is very convenient to store and carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 It is a schematic diagram of the structure of a foldable baby stroller in one embodiment of the present invention, wherein the foldable baby stroller is in an open state;

[0020] Attached Figure 2 For attachment Figure 1 A side view structural schematic diagram of;

[0021] Attached Figure 3 For attachment Figure 2 A schematic diagram of the structure of the top view of the part in the middle;

[0022] Attached Figure 4 It is a schematic diagram of the structure of the foldable baby stroller when it is folded;

[0023] Attached Figure 5 For attachment Figure 4 A side view structural schematic diagram of;

[0024] Attached Figure 6 For folding strollers Figure 4 and attached Figure 5 Schematic diagram of the structure further folded in the state;

[0025] Attached Figure 7 For attachment Figure 6 A side view structural schematic diagram of;

[0026] Attached Figure 8 It is a schematic diagram of the structure of the foldable baby stroller in the folded state;

[0027] Attached Fig. 9 For attachment Figure 8 A side view schematic diagram of the structure;

[0028] Attached Fig.10 For attachment Figure 1 The structure diagram of the foldable baby stroller shown is when it is covered with a cloth cover.

[0029] The numbers in the figure are:

[0030] 100, first base frame; 101, first adapter; 102, limiting groove;

[0031] 200, second base frame; 201, second adapter; 202, limit pin;

[0032] 300, first side frame;

[0033] 400, second side frame;

[0034] 500, first wheel assembly; 501, first spiral groove; 510, first sleeve; 520, second joint; 530, first wheel;

[0035] 600, second wheel assembly; 601, second spiral groove; 610, second sleeve; 620, second joint; 630, second wheel;

[0036] 700, first sliding frame; 701, first sliding sleeve; 702, first driving member;

[0037] 800, second sliding frame; 801, second sliding sleeve; 802, second driving member;

[0038] 910, first connecting rod; 920, second connecting rod; 930, first side connecting rod; 940, second side connecting rod;

[0039] 1000, cloth cover. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

[0041] The terms "inside" and "outside" in the following embodiments refer to two opposite sides of a component, wherein the direction toward the center of the trailer is "inside" and the direction away from the center of the trailer is "outside", and the "left side" and "right side" are another pair of opposite sides of the component, and the area between the left and right sides and between the inner and outer sides is the "inside" of the component.

[0042] Reference Figure 1 To Attachment Fig.10 , including Figure 1-9 The body frame structure is shown. Fig.10 This is the state when the cloth cover is put on the vehicle body frame.

[0043] The foldable baby stroller in this embodiment has an open state and a folded state. The foldable baby stroller includes a frame and a wheel assembly, the frame includes a chassis, the chassis includes a first chassis 100 and a second chassis 200 that are rotatably connected to each other on the inner side, the frame also includes a first side frame 300 rotatably connected to the outer side of the first chassis 100, and a second side frame 400 rotatably connected to the outer side of the second chassis 200. The wheel assembly includes a first wheel assembly 500 rotatably connected to the first chassis 100, and a second wheel assembly 600 rotatably connected to the second chassis 200. A first connecting assembly is provided between the chassis and the first wheel assembly 500, and a second connecting assembly is provided between the chassis and the second wheel assembly 600. During the transition of the foldable baby stroller from the open state to the folded state, the first base frame 100 and the second base frame 200 rotate relative to each other and move closer together, the first wheel assembly 500 and the second wheel assembly 600 are respectively driven by the first connecting assembly and the second connecting assembly to move closer to the first base frame 100 and the second base frame 200, and the first side frame 300 and the second side frame 400 are respectively moved closer to the first base frame 100 and the second base frame 200.

[0044] Specifically, the rotation axis between the first wheel assembly 500 and the first base frame 100 and the rotation axis between the second wheel assembly 600 and the second base frame 200 are both perpendicular to the rotation axes of the wheels in the first wheel assembly 500 and the second wheel assembly 600 .

[0045] Specifically, there are two first wheel assemblies 500 and two second wheel assemblies 600, which are respectively arranged on the left and right sides of the foldable baby stroller.

[0046] This embodiment provides a preferred structure of the first connecting assembly and the second connecting assembly. The first connecting assembly includes a first sliding frame 700 slidably connected to the first base frame 100, a first connecting rod 910 rotatably connected to the second base frame 200 at one end and rotatably connected to the first sliding frame 700 at the other end, a first spiral groove 501 is provided on the first wheel assembly 500, a long straight groove extending in the front-to-back direction is provided on the first base frame 100 (not shown in the drawings), and the first sliding frame 700 has a first driving member 702 slidably connected to the first spiral groove 501 and the long straight groove; the first base frame 100, the second base frame 200, the first connecting rod 910 and the first sliding frame 700 constitute a crank slider mechanism, and when the first driving member 702 slides in the first spiral groove 501, it drives the first wheel assembly 500 to flip toward the inner side of the first base frame 100. Similarly, the second connecting assembly includes a second sliding frame 800 slidably connected to the second chassis 200, a second connecting rod 920 rotatably connected to the first chassis 100 at one end and rotatably connected to the second sliding frame 800 at the other end, a second spiral groove 601 is provided on the second wheel assembly 600, a long straight groove (not shown in the figure) extending in the front-back direction is provided on the second chassis 200, and the second sliding frame 800 has a second driving member 802 slidably connected to the second spiral groove 601 and the long straight groove; the first chassis 100, the second chassis 200, the second connecting rod 920 and the second sliding frame 800 constitute a crank slider mechanism, and when the second driving member 802 slides in the second spiral groove 601, the second wheel assembly 500 is driven to flip toward the inner side of the second chassis 200. Specifically, there are two first connecting rods 910 and two second connecting rods 920, which are respectively arranged on the left and right sides of the folding baby stroller.

[0047] Specifically, the first sliding frame 700 is arranged on the inner side of the first base frame 100 and is located in the same plane as the first base frame 100. The left and right sides of the first sliding frame 700 respectively have first sliding sleeves 701, and the first sliding sleeves 701 on the left and right sides are respectively slidably connected to the left and right sides of the first base frame 100. The first sliding frame 700 also has the first driving member 702, which is a rod and extends in the left and right directions. The left and right ends of the rod are respectively slidably connected to the first spiral grooves 501 on the left and right sides of the first wheel assemblies 500. Similarly, the second sliding frame 800 is arranged on the inner side of the second base frame 200 and is located in the same plane as the second base frame 200. The left and right sides of the second sliding frame 800 respectively have second sliding sleeves 801, and the second sliding sleeves 801 on the left and right sides are respectively slidably connected to the left and right sides of the second base frame 200. The second sliding frame 800 also has the second driving member 802, which is a rod extending in the left-right direction, and the left and right ends of the rod are slidably connected to the second spiral grooves 601 on the second wheel assemblies 600 on the left and right sides respectively.

[0048] Specifically, the first wheel assembly 500 includes a first sleeve 510 pivotally connected to the first chassis 100, a first joint 520 connected to the first sleeve 510, and a first wheel 530 rotatably connected to the first joint 520. The first spiral groove 501 is provided on the first sleeve 510. The first joint 520 and the first sleeve 510 can be fixedly connected or integrally formed, or can be pivotally connected so that the first wheel 530 can be universally rotated. Similarly, the second wheel assembly 600 includes a second sleeve 610 pivotally connected to the second chassis 200, a second joint 620 connected to the second sleeve 610, and a second wheel 630 rotatably connected to the second joint 620. The second spiral groove 601 is provided on the second sleeve 610. The second joint 620 and the second sleeve 610 can be fixedly connected or integrally formed, or can be pivotally connected so that the second wheel 630 can be universally rotated. When the foldable baby stroller is in the open state, the first joint 520 and the first wheel 530 are located below the first base frame 100, and the second joint 620 and the second wheel 630 are located below the second base frame 200; when the foldable baby stroller is in the folded state, the first joint 520 and the first wheel 530 are retracted into the inner side of the first base frame 100, and the second joint 620 and the second wheel 630 are retracted into the inner side of the second base frame 200.

[0049] In a more preferred embodiment, the first connecting assembly and the second connecting assembly are also connected to the first side frame 300 and the second side frame 400 respectively. During the transition of the folding baby stroller from the open state to the folded state, the first side frame 300 and the second side frame 400 are driven by the first connecting assembly and the second connecting assembly to move closer to the first bottom frame 100 and the second bottom frame 200 respectively. The specific structure is as follows: the first connecting assembly also includes a first side connecting rod 930, one end of which is rotatably connected to the first sliding frame 700 and the other end of which is rotatably connected to the first side frame 300. The first side connecting rod 930, the first sliding frame 700, the first bottom frame 100 and the first side frame 300 constitute a crank slider mechanism; the second connecting assembly also includes a second side connecting rod 940, one end of which is rotatably connected to the second sliding frame 800 and the other end of which is rotatably connected to the second side frame 400. The second side connecting rod 940, the second sliding frame 800, the second bottom frame 200 and the second side frame 400 constitute a crank slider mechanism.

[0050] In a more preferred embodiment, when the folding baby stroller is in the open state, the first connecting rod 910, the first base frame 100, the first sliding frame 700, the second connecting rod 920, the second base frame 200, and the second sliding frame 800 are all arranged in parallel and are on the same plane, and the plane is assumed to be M, so as to jointly constitute a flat support surface for children to sit on; when the folding baby stroller is in the folded state, the first connecting rod 910 and the second connecting rod 920 are both perpendicular to the first base frame 100 and the first sliding frame 700, and perpendicular to the second base frame 200 and the second sliding frame 800, so that the entire vehicle can present a flat shape after being folded.

[0051] In a more preferred embodiment, the first base frame 100 has a first adapter portion 101 on its inner side, the second base frame 200 has a second adapter portion 201 on its inner side, and the first base frame 100 and the second base frame 200 are rotatably connected via the first adapter portion 101 and the second adapter portion 201. The first connecting rod 910 and the second connecting rod 920 are rotatably connected to the second adapter portion 201 and the first adapter portion 101, respectively. The first adapter part 101 and the second adapter part 201 are both arc-shaped and are superior arcs. If a plane N is perpendicular to the rotation axis between the first adapter part 101 and the second adapter part 201, the projections of the circle where the first adapter part 101 and the circle where the second adapter part 201 are located on the plane N coincide with each other, and the rotation axis between the first adapter part 101 and the second adapter part 201 is located at the center of the circle where the two circles are located. The plane M mentioned above is tangent to the circle where the first adapter part 101 and the second adapter part 201 are located. When the foldable stroller is in the open state, the first adapter part 101 and the second adapter part 102 are located below the plane M, so as not to affect the child's riding. When the foldable stroller is in the folded state, the projections of the first adapter part 101 and the second adapter part 201 on the plane N coincide with each other, and the first connecting rod 910 and the second connecting rod 920 are located at the straight line edges of the arc, as shown in the attached figure. Fig. 9 As shown, the folded baby stroller is not only flat but also closer to a regular shape and more beautiful in appearance.

[0052] A limiting mechanism is provided between the first base frame 100 and the second base frame 200 to keep the two in a relatively open position. In this embodiment, a specific structure of the limiting mechanism is provided: an arc-shaped limiting groove 102 provided on the first adapter portion 101, and a limiting pin 202 fixedly provided on the second adapter portion 201 and slidably connected to the limiting groove 102. When the folding baby stroller is folded or opened, the limiting pin 202 slides in the limiting groove 102, thereby not affecting the mutual rotation between the first base frame 100 and the second base frame 200. When the folding baby stroller is in an open state, the limiting pin 202 slides to one end of the limiting groove 102 and abuts against the groove wall at the end, thereby keeping the first base frame 100 and the second base frame 200 in the current relative position.

[0053] Working principle:

[0054] When folding, the first base frame 100 and the second base frame 200 rotate relative to each other and move closer, and the connection between the two moves upward. Driven by the relative rotation of the two, the crank slider mechanism composed of the first base frame 100, the second base frame 200, the first connecting rod 910, and the first sliding frame 700 and the crank slider mechanism composed of the first base frame 100, the second base frame 200, the second connecting rod 920, and the second sliding frame 800 act simultaneously, so that the first sliding frame 700 and the second sliding frame 800 move inward, and the first driving member 702 and the second driving member 800 move inward. 02 slide in the first spiral groove 501 and the second spiral 502 respectively. Under the interaction of the first driving member 702 and the first spiral grooves 501 on the left and right sides, the first wheel assemblies 500 on the left and right sides rotate at the same time and flip over to the inner side of the first base frame 100. Similarly, under the interaction of the second driving member 802 and the second spiral grooves 601 on the left and right sides, the second wheel assemblies 600 on the left and right sides rotate at the same time and flip over to the inner side of the second base frame 200, thereby realizing the folding and stowing of the first wheel assembly 500 and the second wheel assembly 600. At the same time, driven by the movement of the first sliding frame 700 and the second sliding frame 800, the slider crank mechanism composed of the first side connecting rod 930, the first sliding frame 700, the first bottom frame 100, and the first side frame 300, and the slider crank mechanism composed of the second side connecting rod 940, the second sliding frame 800, the second bottom frame 200, and the second side frame 400 simultaneously operate, and driven by the first side connecting rod 930 and the second side connecting rod 940, the first side frame 300 and the second side frame 400 rotate and approach the first bottom frame 100 and the second bottom frame 200 respectively. Until all parts are fully folded to form a flat shape, the whole vehicle is folded.

[0055] In this embodiment, a cloth cover 1000 is provided around the first side frame 300, the second side frame 400 and the chassis, thereby forming a hollow receiving space. When the folding baby stroller is in an open state, the wheel assembly is in a first position, at which the wheel assembly is located below the chassis and outside the space where the frame is located, and the rotating shafts of the first wheel 530 and the second wheel 630 are arranged parallel to each other along the left-right direction of the frame; when the baby stroller is in a folded state, the wheel assembly is in a second position, at which the wheel assembly is located within the space where the frame is located, and the rotating shafts of the first wheel 530 and the second wheel 630 are arranged parallel to each other or collinearly along the front-back direction of the frame.

[0056] The foldable baby stroller in the above embodiment has a structural design such that, after folding, the two bottom frames are folded relative to each other, and the two side frames and the bottom frame are brought close to each other. At the same time, driven by the connecting assembly, the wheels are turned over and brought close to the chassis, and the entire stroller is flat, which greatly reduces the occupied space and is very convenient to store and carry.

[0057] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A foldable baby stroller having an open state and a folded state, the foldable baby stroller comprising a chassis, characterized in that: The chassis comprises a first chassis (100) and a second chassis (200) which are rotatably connected to each other on the inner sides; the foldable baby stroller also comprises a first side frame (300) rotatably connected to the outer side of the first chassis (100), a second side frame (400) rotatably connected to the outer side of the second chassis (200), a first wheel assembly (500) rotatably connected to the first chassis (100), and a second wheel assembly (600) rotatably connected to the second chassis (200); a first connecting assembly is arranged between the chassis and the first wheel assembly (500); a second connecting assembly is arranged between the chassis and the second wheel assembly (600); the first connecting assembly comprises a first sliding frame (700) slidably connected to the first chassis (100), and a first sliding frame (700) having one end rotatably connected to the second chassis (200). ), the first wheel assembly (500) being provided with a first spiral groove (501), and the first sliding frame (700) having a first driving member (702) being slidably connected to the first spiral groove (501); the second connecting assembly comprising a second sliding frame (800) being slidably connected to the second base frame (200), a second connecting rod (920) having one end being rotatably connected to the first base frame (100) and the other end being rotatably connected to the second sliding frame (800), the second wheel assembly (600) being provided with a second spiral groove (601), and the second sliding frame (800) having a second driving member (802) being slidably connected to the second spiral groove (601); During the transition of the foldable baby stroller from the open state to the folded state, the first base frame (100) and the second base frame (200) rotate relative to each other and move closer together, the first wheel assembly (500) and the second wheel assembly (600) are respectively driven by the first connecting assembly and the second connecting assembly to move closer together with the first base frame (100) and the second base frame (200), and the first side frame (300) and the second side frame (400) are respectively moved closer together with the first base frame (100) and the second base frame (200); The first connecting assembly and the second connecting assembly are also connected to the first side frame (300) and the second side frame (400) respectively. During the transition of the foldable baby stroller from an open state to a folded state, the first side frame (300) and the second side frame (400) are driven by the first connecting assembly and the second connecting assembly to move closer to the first bottom frame (100) and the second bottom frame (200) respectively.

2. The foldable baby stroller according to claim 1, characterized in that: The first wheel assembly (500) comprises a first sleeve (510) pivotally connected to the first base frame (100), a first joint (520) connected to the first sleeve (510), and a first wheel (530) rotatably connected to the first joint (520), wherein the first spiral groove (501) is formed on the first sleeve (510); The second wheel assembly (600) comprises a second sleeve (610) pivotally connected to the second base frame (200), a second joint (620) connected to the second sleeve (610), and a second wheel (630) rotatably connected to the second joint (620), and the second spiral groove (601) is formed on the second sleeve (610).

3. The foldable baby stroller according to claim 2, characterized in that: When the foldable baby stroller is in an open state, the first joint (520) and the first wheel (530) are located below the first base frame (100), and the second joint (620) and the second wheel (630) are located below the second base frame (200); when the foldable baby stroller is in a folded state, the first joint (520) and the first wheel (530) are retracted inside the first base frame (100), and the second joint (620) and the second wheel (630) are retracted inside the second base frame (200).

4. The foldable baby stroller according to claim 1, characterized in that: The rotation axis between the first wheel assembly (500) and the first base frame (100), and the rotation axis between the second wheel assembly (600) and the second base frame (200) are both perpendicular to the rotation axes of the wheels in the first wheel assembly (500) and the second wheel assembly (600).

5. The foldable baby stroller according to claim 1, characterized in that: The first connecting assembly further comprises a first side connecting rod (930) having one end rotatably connected to the first sliding frame (700) and the other end rotatably connected to the first side frame (300); the second connecting assembly further comprises a second side connecting rod (940) having one end rotatably connected to the second sliding frame (800) and the other end rotatably connected to the second side frame (400).

6. The foldable baby stroller according to claim 1, characterized in that: When the foldable baby stroller is in an open state, the first connecting rod (910), the first base frame (100), the first sliding frame (700), the second connecting rod (920), the second base frame (200), and the second sliding frame (800) are all arranged in parallel; when the foldable baby stroller is in a folded state, the first connecting rod (910) and the second connecting rod (920) are both perpendicular to the first base frame (100) and the first sliding frame (700), and perpendicular to the second base frame (200) and the second sliding frame (800).

7. The foldable baby stroller according to claim 1, characterized in that: The first base frame (100) has a first adapter portion (101) on its inner side, and the second base frame (200) has a second adapter portion (201) on its inner side. The first adapter portion (101) and the second adapter portion (201) are both in the shape of a bow and are major arcs. The first adapter portion (101) and the second adapter portion (201) are rotatably connected to each other. The first connecting rod (910) and the second connecting rod (920) are rotatably connected to the second adapter portion (201) and the first adapter portion (101) respectively. The plane is perpendicular to the rotation axes of the first adapter portion (101) and the second adapter portion (201); the projections of the circle where the first adapter portion (101) is located and the circle where the second adapter portion (201) is located on the plane coincide with each other; the rotation axis between the first adapter portion (101) and the second adapter portion (201) is located at the center of the circles where the first adapter portion (101) and the second adapter portion (201) are located; and when the foldable baby stroller is in a folded state, the projections of the first adapter portion (101) and the second adapter portion (201) on the plane coincide with each other.

8. The foldable baby stroller according to claim 7, characterized in that: An arc-shaped limiting groove (102) is provided on one of the first adapter part (101) and the second adapter part (201), and a limiting pin (202) slidably connected to the limiting groove (102) is fixedly provided on the other of the first adapter part (101), and when the folding baby stroller is in an open state, the limiting pin (202) abuts against a groove wall at one end of the limiting groove (102).

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