Baby stroller

Abstract

The present invention discloses a baby stroller, comprising a frame and a seat mounted on the frame, wherein the frame comprises two symmetrically arranged side frames, each side frame comprises a handlebar, a front footbar, a connecting rod and a rear footbar which are hinged in sequence to form a foldable four-bar linkage, the hinge point between the handlebar and the front footbar is a first hinge point, the hinge point between the handlebar and the rear footbar is a second hinge point, the position of the first hinge point is higher than the position of the second hinge point, and the angle between the line between the first hinge point and the second hinge point and the front footbar is 0° to 15°, and when folded, the handlebar and the rear footbar rotate and approach the front footbar from both sides of the front footbar. Since the first hinge point of the baby stroller of the present invention is higher than the second hinge point, the spacing between the rear footbar and the connecting rod is smaller than that of the traditional structure, so the four-bar linkage in the middle appears more compact and has a simpler shape.

Description

Technical Field

[0001] The invention relates to the field of baby strollers, in particular to a baby stroller with a simpler shape. Background Art

[0002] A baby stroller is a tool vehicle designed to provide convenience for outdoor activities for babies. It generally has a front foot rod, a rear foot rod and a handlebar. For the convenience of carrying, most of them have a foldable function. For example, the Chinese patent document with publication number CN 209700773 U discloses a baby stroller frame folding joint, a baby stroller frame and a baby stroller. The above three rods are rotated and folded only by a single hinge structure, and the hinge structure is also connected to a seat for carrying the baby, but the rotation structure is relatively complex and has safety hazards. For another example, the Chinese patent document with publication number CN 2186194 Y discloses a foldable baby stroller, including a handlebar tube, a front foot tube, a seat tube and a rear foot tube that are hinged in sequence, which form a foldable four-bar linkage. The four-bar linkage accounts for a large proportion of the overall frame and the shape is not simple. Summary of the invention

[0003] The invention provides a baby stroller, which solves the problem that the existing baby strollers are not concise enough in shape.

[0004] A baby stroller comprises a frame and a seat mounted on the frame, the frame comprising two symmetrically arranged side frames, each side frame comprising a handlebar, a front footbar, a connecting rod and a rear footbar which are hinged in sequence to form a foldable four-bar linkage, the hinge point between the handlebar and the front footbar being a first hinge point, the hinge point between the handlebar and the rear footbar being a second hinge point, when the baby stroller is in an unfolded state, the position of the first hinge point is higher than the position of the second hinge point, and when folded, the handlebar and the rear footbar are respectively rotated from both sides of the front footbar to move closer to the front footbar.

[0005] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0006] Optionally, the handlebar and the front foot bar abut against each other at a position between the first hinge point and the second hinge point, and the abutment and support is carried out in at least one of the following ways:

[0007] Mode a, when the handlebar is unfolded around the first hinge point to the extreme position, it abuts against the front foot bar;

[0008] Mode b: the handlebar rod and the front foot rod abut against each other along the width direction of the frame.

[0009] Optionally, an angle between a line between the first hinge point and the second hinge point and the front foot rod is 0°~15°.

[0010] Optionally, the hinge point between the connecting rod and the front foot rod is a third hinge point, and the first hinge point, the second hinge point and the third hinge point are substantially collinear.

[0011] Optionally, the hinge point between the connecting rod and the rear foot rod is a fourth hinge point, and the line between the first hinge point and the fourth hinge point is a reference line;

[0012] In the unfolded state, the second hinge point and the third hinge point are located on the same side of the reference line; in the folded state, the second hinge point and the third hinge point are located on both sides of the reference line respectively.

[0013] Optionally, the second hinge point and the third hinge point are adjacent to each other;

[0014] In contrast, in the folded state, the second hinge point and the third hinge point are away from each other.

[0015] Optionally, during the folding process, the first hinge point and the fourth hinge point first move away from each other and then move toward each other.

[0016] Optionally, the top of the rear foot rod has a bending section so that the rear foot rod is close to the front foot rod in the folded state.

[0017] Optionally, the handlebar has a supporting boss at a position adjacent to the second hinge point, and in the unfolded state, the supporting boss abuts against the bent section.

[0018] Optionally, the connecting rod is L-shaped, and in the unfolded state, the handlebar, front foot rod, connecting rod and rear foot rod form a concave pentagon.

[0019] Since the first hinge point of the baby stroller of the present invention is higher than the second hinge point, the distance between the rear foot rod and the connecting rod is smaller than that of the traditional structure, so the four-link mechanism in the middle part is more compact and has a simpler shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a baby stroller in one embodiment;

[0021] Figure 2 A three-dimensional diagram of a baby stroller;

[0022] Figure 3 is a cross-sectional view of the frame;

[0023] Figure 4 for Figure 3 Another state diagram of ;

[0024] Figure 5 for Figure 3 Another state diagram of ;

[0025] Figure 6 for Figure 3 Schematic diagram of removing the front foot shell;

[0026] Figure 7 for Figure 6 Enlarged view of middle part B;

[0027] Figure 8 This is an exploded view of the front foot bar and the handle bar in the baby stroller;

[0028] Fig. 9 The figure is a schematic diagram of the assembly of the front foot bar and the handle bar in the baby stroller;

[0029] Fig.10 This is an exploded view of the front foot bar in a baby stroller;

[0030] Fig.11 for Figure 8 Enlarged view of the middle C part;

[0031] Fig.12 for Figure 8 Enlarged view of the middle D part;

[0032] Fig.13 This is a schematic diagram of a baby stroller in a folded state;

[0033] Fig.14 for Fig.13 Enlarged view of the middle E part;

[0034] Fig.15 is a cross-sectional view of a groove and an extension section in a baby stroller;

[0035] Fig.16 for Fig.11 Schematic diagram from another perspective;

[0036] Fig.17 for Fig.12 Schematic diagram from another perspective;

[0037] Fig.18 The figure is a cross-sectional view of the locked state of the handlebar and the groove in the baby stroller;

[0038] Fig.19 It is a schematic diagram of the unfolded state of the handlebar in the baby stroller;

[0039] Fig. 20 It is a schematic diagram of the folded state of the handlebar in the baby stroller;

[0040] Fig.21 It is a cross-sectional view of the handlebar in the baby stroller in a folded state;

[0041] Fig. 22 It is a cross-sectional view of the locking structure of the handlebar in the baby stroller;

[0042] Fig.23 This is an exploded view of the locking structure of the handlebar in a baby stroller;

[0043] Fig.24 is a perspective view of a sliding member in a baby stroller;

[0044] Fig.25 is a perspective view of a positioning pin in a baby stroller;

[0045] Fig.26 It is a cross-sectional view of the locking structure of the handlebar in the baby stroller;

[0046] Fig. 27 for Fig.26 Another state diagram of ;

[0047] Fig.28 It is a structural section of a release switch in a baby stroller;

[0048] Fig.29 It is a three-dimensional cross-sectional view of the head in the baby stroller;

[0049] Fig.30 is a cross-sectional view of a frame of another embodiment;

[0050] Fig.31 for Fig.30 Schematic diagram of the folded state;

[0051] Fig.32 The figure is an exploded view of the connecting rod in the baby stroller;

[0052] Fig.33 for Fig.30 Stereoscopic image of

[0053] Fig.34 An exploded view of the rear foot bar of a baby stroller;

[0054] Fig.35 for Fig.34 Enlarged view of the middle H section;

[0055] Fig.36 This is an exploded view of the handlebar and rear footbar in a baby stroller;

[0056] Fig.37 for Fig.36 Enlarged view of the middle I part;

[0057] Fig.38 A schematic diagram of a handlebar in a baby stroller according to another embodiment;

[0058] Fig.39The figure is a schematic diagram of the connection between the first pull wire and the sliding member in the baby stroller.

[0059] The reference numerals in the figures are described as follows:

[0060] 1. Side frame; 7. Storage basket; 8. Seat; 9. Frame;

[0061] 100, front foot bar; 110, front wheel;

[0062] 120, groove; 1201, first avoidance groove; 1202, avoidance opening; 1203, arc-shaped slideway; 1204, second mounting hole; 1205, bayonet;

[0063] 130, front foot frame; 1301, first mounting hole;

[0064] 140, front foot shell; 1401, second avoidance groove; 141, front foot pedal;

[0065] 150, first pivot;

[0066] 200, rear foot bar; 210, rear wheel; 220, bending section;

[0067] 230, rear foot housing; 231, mounting platform; 232, round hole; 233, support arm; 234, second pivot; 235, second through hole;

[0068] 240, hind leg skeleton; 241, avoidance zone;

[0069] 250, rear foot bar;

[0070] 300, connecting rod; 310, transverse section; 320, upward section;

[0071] 330, connecting rod housing; 331, L-shaped groove;

[0072] 340, connecting rod skeleton;

[0073] 400, handlebar; 401, slide groove; 402, first through hole; 403, third guide groove; 404, first channel;

[0074] 410, gripping rod; 420, extension section; 421, guide step; 422, third mounting hole;

[0075] 430, support boss;

[0076] 440, locking tongue; 4401, waist-shaped groove; 4402, abutment portion

[0077] 441, first elastic member; 442, first pull wire; 443, driving member; 444, latch;

[0078] 450, upper hand handle;

[0079] 451, positioning pin; 4511, rectangular through hole; 4512, first wire groove; 4513, third avoidance groove;

[0080] 452, second elastic member;

[0081] 453, sliding member; 4531, strip hole; 4532, matching groove; 4533, fourth elastic member; 4534, avoidance hole;

[0082] 454, positioning piece;

[0083] 4551, release member; 4552, locking member; 4553, button;

[0084] 4554, pin hole; 4555, third elastic member;

[0085] 456, end cap; 4561, upper end cap; 4562, lower end cap; 4563, first guide groove; 4564, second guide groove; 4565, second line groove; 4566, fourth avoidance groove;

[0086] 457, second pull line;

[0087] 458, cup holder;

[0088] 460, lower handlebar; 461, positioning pin hole;

[0089] 500, support rod;

[0090] 600, adapter; 601, mounting seat; 602, fourth mounting hole;

[0091] 700, horizontal bar;

[0092] 10, first hinge point; 20, second hinge point; 30, third hinge point; 40, fourth hinge point; 50, fifth hinge point; 60, sixth hinge point;

[0093] α, angle. DETAILED DESCRIPTION

[0094] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0095] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0096] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0097] In the present invention, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number or order of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0098] Reference Figure 1~Figure 3 The present embodiment provides a baby stroller, comprising a frame 9 and a seat 8 mounted on the frame 9, wherein the frame 9 comprises two symmetrically arranged side frames 1, each side frame 1 comprises a handlebar 400, a front footbar 100, a connecting rod 300 and a rear footbar 200 which are hinged in sequence to form a foldable four-bar linkage, the hinge point between the handlebar 400 and the front footbar 100 is a first hinge point 10, the hinge point between the handlebar 400 and the rear footbar 200 is a second hinge point 20, when the baby stroller is unfolded, the position of the first hinge point 10 is higher than the position of the second hinge point 20, when folded, the handlebar 400 and the rear footbar 200 respectively rotate from both sides of the front footbar 100 to move closer to the front footbar 100.

[0099] The baby stroller of the present application has two states: unfolded and folded. The relative height relationship can be combined with the perspective of all wheels on the horizontal ground in the unfolded state, for example Figure 3 The folded state is when the handlebar 400 approaches the front foot bar 100 until it interferes with the front foot bar 100 and cannot move further closer, for example Figure 5 .

[0100] There are two groups of side brackets, which are symmetrically arranged on both sides (here the main emphasis is on the relative position relationship, and does not limit the complete consistency of the structural details of the two), and the brackets on both sides include a handlebar rod 400, a front foot rod 100, a connecting rod 300 and a rear foot rod 200.

[0101] The handlebar 400, the front foot bar 100, the rear foot bar 200 and the connecting rod 300 are hinged to form a four-bar linkage. During the unfolding / folding process, the handlebar 400, the front foot bar 100, the rear foot bar 200 and the connecting rod 300 rotate and pull each other by means of the four-bar linkage to realize the unfolding and folding of the entire vehicle.

[0102] The first hinge point 10 is not at the lowest point of the handlebar 400, but slightly offset upwards, and the handlebar 400 is hinged to the top of the front leg rod 100 at this position, and the position below the first hinge point 10 on the handlebar 400 further extends obliquely downward along the front leg rod 100, and the bottom of the handlebar 400 is hinged to the top of the rear leg rod 200 to form a second hinge point 20. Compared with the existing baby stroller with only one hinge point, the multiple hinge points make the structure of each hinge point simple, improve the structural stability, and avoid folding failure or unusability.

[0103] Combination Figure 3~Figure 5 In order to facilitate understanding of the folding changes, taking the front foot rod 100 as an example where the front foot rod 100 is fixed in space, the handlebar 400 rotates counterclockwise around the first hinge point 10 and continuously approaches the front foot rod 100. At the same time, the rotating handlebar 400 drives the second hinge point 20 to move. Correspondingly, the rear foot rod 200 rotates around the second hinge point 20 and continuously approaches the front foot rod 100 by relying on the pulling of the connecting rod 300, and finally folds into a flat shape for easy storage and carrying.

[0104] The seat 8 is used to carry infants and children. It can be a detachable independent component that does not affect its riding function even after being disassembled, or it can be a cloth cover set on the frame 9.

[0105] In order to achieve movement and steering, in one embodiment, a front wheel 110 is provided at the bottom of the front foot bar 100, and the front wheel 110 may be a universal wheel. A rear wheel 210 is provided at the bottom of the rear foot bar 200, and the rear wheel 210 may be a fixed wheel. The rear wheel 210 on the same side is in the same plane as the front wheel 110, or may be staggered. For example, in order to avoid interference after folding, the wheelbase of the front wheel 110 may be smaller (or larger) than the wheelbase of the rear wheel 210.

[0106] In one embodiment, a storage basket 7 for placing items is provided under the seat 8 .

[0107] The position of the first hinge point 10 is higher than that of the second hinge point 20. Under the premise that the overall height of the frame 9 remains unchanged, the handlebar 400 and the front foot bar 100 can be further extended so that the two can at least partially interact with each other to improve the stability of the frame 9. For example, in one embodiment,

[0108] The handlebar 400 and the front foot bar 100 are supported against each other at a position between the first hinge point 10 and the second hinge point 20, and the supporting manner is at least one of the following manners:

[0109] Mode a, when the handlebar 400 is unfolded to the extreme position around the first hinge point 10, it abuts against the front foot bar 100;

[0110] In mode b, the handlebar rod 400 and the front foot rod 100 abut against each other along the width direction of the frame.

[0111] In order to further improve safety and eliminate the hidden danger of pinching, in a preferred embodiment, the structures that abut against each other are partially mutually inclusive, that is, the load-bearing parts that interact with each other are hidden.

[0112] like Figure 3 As shown, in one embodiment, the angle α between the line between the first hinge point 10 and the second hinge point 20 and the front foot rod 100 is not greater than 45°.

[0113] When considering the angle α, the front foot bar 100 can be approximated as a straight bar or its overall extension trend can be emphasized. When the shape of the front foot bar 100 is more complicated, only the part adjacent to the first hinge point 10 can be focused on. The angle α is not greater than 45°, so that the second hinge point 20 is close to the front foot bar 100, and the frame structure is more compact. In a preferred embodiment, the angle α between the connecting line between the first hinge point 10 and the second hinge point 20 and the front foot bar 100 is 0°~15°.

[0114] When the angle α is 0°, the handlebar 400 and the front foot bar 100 are roughly in a straight line, and a part of the rear foot bar 200 (the corresponding position of the second hinge point 20) is also basically attached to the front foot bar 100, which not only makes the appearance more simple and compact, but also helps to improve the stability and overall strength of the frame 9.

[0115] like Figure 3 As shown, in this embodiment, the hinge point between the connecting rod 300 and the front foot rod 100 is the third hinge point 30, and the first hinge point 10, the second hinge point 20 and the third hinge point 30 are substantially collinear.

[0116] The lines connecting the first, second and third hinge points 30 form a triangle, and the three hinge points are roughly collinear, and one of the angles of the triangle is less than 15°. In a preferred embodiment, one of the angles is less than 10°, and the three hinge points are nearly in a straight line, which enables the hinge structure to be further hidden, making the appearance more concise.

[0117] Combination Figure 3~Figure 5In this embodiment, the hinge point between the connecting rod 300 and the rear foot rod 200 is the fourth hinge point 40, and the line between the first hinge point 10 and the fourth hinge point 40 is the reference line. In the unfolded state, the second hinge point 20 and the third hinge point 30 are on the same side of the reference line, and in the folded state, the second hinge point 20 and the third hinge point 30 are respectively on both sides of the reference line.

[0118] The connecting rod 300 is hinged to the inner side of the rear foot rod 200 to form a fourth hinge point 40. The fourth hinge point 40 is hidden inside the rear foot rod 200, and the appearance is more concise. In the unfolded state, the first, third and fourth hinge points 40 form a triangular area in space. Since the second hinge point 20 and the third hinge point 30 are on the same side, the second hinge point 20 is in the triangular area, which is more compact than the existing four-bar linkage. During the folding process, the second hinge point 20 moves and leaves the triangular area. Finally, the second hinge point 20 and the third hinge point 30 are located on both sides of the reference line, and the four hinge points are roughly collinear, which reduces the volume after folding.

[0119] like Figure 3~Figure 5 As shown, in this embodiment, in the unfolded state, the second hinge point 20 and the third hinge point 30 are adjacent to each other. Conversely, in the folded state, the second hinge point 20 and the third hinge point 30 are far away from each other.

[0120] In the unfolded state, the second hinge point 20 and the third hinge point 30 are close to each other, so that the triangular area is further reduced, and the four-bar linkage is more compact. When the second hinge point 20 and the third hinge point 30 are close enough, it is difficult to find the existence of four hinge points when observing from a distance, and the appearance is more concise. During the folding process, the front foot rod 100 is considered to be fixed, and the third hinge point 30 does not move in space. The second hinge point 20 gradually moves away from the third hinge point 30, and relies on the rotation of the first and third hinge points 30 to drive the handlebar 400 and the rear foot rod 200 from both sides of the front foot rod 100 to move closer to the front foot rod 100, and finally complete the folding.

[0121] like Figure 3~Figure 5 As shown, in this embodiment, during the folding process, the first hinge point 10 and the fourth hinge point 40 first move away from each other and then move toward each other.

[0122] During the folding process, the movement trajectory of the second hinge point 20 passes through the reference line. When the second hinge point 20 is in the triangular area and gradually approaches the reference line, the first and fourth hinge points move away from each other. When the second hinge point 20 is located on the reference line, the distance between the first and fourth hinge points 40 is the largest. When the second hinge point 20 passes through the reference line and gradually moves away, the first and fourth hinge points 40 gradually move closer, and at the same time, the handlebar 400 and the rear foot bar 200 synchronously approach the front foot bar 100, and finally complete the folding.

[0123] like Figure 5 As shown, in one embodiment, the top of the rear leg bar 200 has a bending section 220 so that the rear leg bar 200 is close to the front leg bar 100 in the folded state.

[0124] The bending section 220 is bent forward from the top of the rear foot rod 200 to form an inflection point. In the folded state, the rear foot rod 200 with the bending section 220 and the handlebar 400 form an accommodation space, which is used to accommodate the front foot rod 100, so that the front foot rod 100 and the rear foot rod 200 in the same plane are closer to each other, and the space occupied after folding is further reduced. In a preferred embodiment, the angle range of the inflection point is between 90° and 180° to avoid interference between the rear foot rod 200 and the front foot rod 100.

[0125] The bending section 220 is an integral or split structure of the rear foot rod 200, and can be formed by injection molding, casting, cold processing, etc. according to the material. When an integral structure is adopted, the assembly of parts can be reduced and the structural strength can be increased.

[0126] like Figure 6 and Figure 7 As shown, in one embodiment, the handlebar 400 has a supporting boss 430 at a position adjacent to the second hinge point 20 , and in the unfolded state, the supporting boss 430 abuts against the bent section 220 .

[0127] The support boss 430 is located at the bottom of the handlebar 400 and has a support surface that abuts against the upper surface of the bent section 220, which is used to support the handlebar 400 and improve the stability of use in the unfolded state. The support surface is smaller than the upper surface of the bent section 220, ensuring that the support boss 430 is sufficiently supported by the bent section 220, making the use of the handlebar 400 more stable. The upper surface of the bent section 220 is adapted to the support surface, and the matching gap is minimized to avoid the gap from pinching children.

[0128] like Figure 7 As shown, in one embodiment, the connecting rod 300 is L-shaped, and in the unfolded state, the handlebar 400, the front leg rod 100, the connecting rod 300 and the rear leg rod 200 form a concave pentagon.

[0129] In the unfolded state, the front foot rod 100 and the rear foot rod 200 are on opposite sides, and the concave portion of the concave pentagon extends into the interior of the pentagon from the second hinge point 20 of the handlebar rod 400, causing the top end of the rear foot rod 200 connected to the second hinge point 20 to be close to the front foot rod 100, making the four-bar linkage more compact.

[0130] The connecting rod 300 is arranged on the inner side of the front foot rod 100. In the folded state, the L-shaped connecting rod 300 is staggered with the top of the front foot rod 100 to avoid interference with the front foot rod 100, so that the first hinge point 10 and the third hinge point 30 are as close as possible, and the structure is more compact.

[0131] like Figure 8 and Fig. 9 As shown, in another embodiment, the portion of the handlebar rod 400 between the first hinge point 10 and the second hinge point 20 is an extension section 420 , and the top of the front foot rod 100 has a groove 120 for accommodating the extension section 420 .

[0132] The extension section 420 is used to connect the first hinge point 10 and the second hinge point 20. It can be assembled to the bottom of the handlebar 400 as a separate part, or it can be integrally formed by the handlebar 400. At least one side of the edge of the groove 120 is provided with a first avoidance groove 1201 for avoiding the extension section 420 during installation. After assembly, since there are installation gaps or hinge structures at both ends of the extension section 420, which are located below the front foot rod 100, the groove 120 shields the installation gap or hinge structure at the extension section 420 to prevent children from touching the hinge point and getting injured. The extension section 420 is located below the front foot rod 100, and the extension section 420 is hidden inside the groove 120, making the appearance more concise.

[0133] like Fig. 9 As shown, in this embodiment, the forefoot rod 100 includes a forefoot frame 130 and a forefoot shell 140 wrapped around the forefoot frame 130 , the top of the forefoot shell 140 extends out of the forefoot frame 130 , and the extended portion has a U-shaped cross-section and surrounds a groove 120 .

[0134] The groove 120 is integrally formed by injection molding of the front foot shell 140, and the surface of the groove 120 close to the front foot rod 100 is closed, and smoothly transitions with the front foot shell to avoid pinching children. The U-shaped opening is oriented toward the side close to the rear foot rod 200.

[0135] The front foot frame 130 is in the shape of a rod, and serves as the main support member of the front foot rod 100. A plurality of first mounting holes 1301 are provided on the front foot frame 130, and the bottom ends of the front foot shells 140 on both sides are connected by front foot pedals 141 to form a U-shape. The front foot pedals 141 are provided for passengers to place their feet on one hand, and on the other hand, reduce the shaking of the frame 9 along both sides. In a preferred embodiment, the front foot pedals 141 are integrally formed with the front foot shell 140 to enhance the structural strength. A second avoidance groove 1401 for installing the front foot frame 130 is provided at the bottom of the front foot shell 140, and the opening of the second avoidance groove 1401 faces downward. Combined with the groove 120, the front foot shell 140 is inserted from top to bottom outside the front foot frame 130 and at the same time relies on the groove 120 to cover the extension section 420, and then the two are fixedly connected by bolts passing through the mounting holes. When the second avoidance groove 1401 of the front foot shell 140 and the groove 120 at the top are installed, they cover the front foot frame 130 and the extension section 420 at the same time, which is convenient for assembly. The groove 120 covers the upper surface and two side walls of the extension section 420 to limit the left and right shaking of the handlebar 400.

[0136] In one embodiment, the first hinge point 10 is located at the junction of the groove 120 and the extension section 420 .

[0137] The joint part is the part where the inner wall of the groove 120 and the outer wall of the extension section 420 are in contact, and is located in the groove 120. The first hinge point 10 is also in the groove 120, so that children are prevented from being pinched by the first hinge point 10. The first hinge point 10 is shielded, and the appearance is more concise.

[0138] like Figure 11~Figure 14 As shown, in one embodiment, a relief opening 1202 is provided at the bottom of the groove 120 to allow the extension section 420 to be folded toward the bottom of the groove when folded.

[0139] The avoidance opening 1202 is opened at the bottom of the groove toward the side close to the front foot rod 100, and its width is adapted to the width of the extension section 420. When the handle bar 400 rotates around the first hinge point 10, until the handle bar 400 abuts against the bottom of the groove and cannot be folded further, the avoidance opening 1202 shortens the length of the bottom of the groove, so that the extension section 420 can continue to rotate and extend into the avoidance opening 1202, so that the handle bar 400 is closer to the front foot rod 100, and the volume after folding is reduced. Since the avoidance opening 1202 is located in an area that is easy for children to release, the edge of the avoidance opening 1202 and the adjacent part of the extension section 420 are smoothly transitioned, which reduces the assembly gap spacing on the one hand to prevent children from being pinched. On the other hand, it eliminates sharp corners to prevent children from being scratched.

[0140] like Figure 11~Figure 15As shown, in one embodiment, a first pivot 150 is penetrated between two opposite side walls of the groove 120 and the extension section 420 at the first hinge point 10, and two opposite inner walls of the groove 120 are provided with arc-shaped slides 1203 distributed around the first pivot 150, and a guide step 421 cooperating with the arc-shaped slide 1203 is provided at a corresponding position of the extension section 420.

[0141] The first pivot 150 is a circular axis, and the side projection point where its axis is located is the first hinge point 10. The groove 120 and the extension section 420 are respectively provided with a second mounting hole 1204 and a third mounting hole 422 corresponding to each other. The first pivot 150 passes through the second mounting hole 1204 and the third mounting hole 422 and is fixedly connected to the groove 120. The extension section 420 can rotate around the first pivot 150.

[0142] Since the handle bar 400 rotates around the first pivot 150, its motion path is circular, so the arcuate slide 1203 and the guide step 421 cooperate with each other to form a partially circular guide path, which is concentric with the motion path of the handle bar 400, making the rotation of the handle bar 400 more stable. The arcuate slide 1203 is vertically protruded from the inner wall of the groove 120, and correspondingly, the guide step 421 is recessed at the corresponding position by the extension section 420.

[0143] In one embodiment, a locking mechanism is disposed in the groove 120 to keep the frame 9 in the unfolded state.

[0144] The locking mechanism is used to keep the baby stroller in the unfolded state to prevent it from folding during normal pushing and pulling. Since the locking mechanism has an assembly gap and moving parts, the locking mechanism is arranged and hidden in the groove 120 in the unfolded state, so that children cannot touch the locking mechanism, thereby avoiding pinching the child and having a simpler appearance.

[0145] like Figure 16~Figure 18 As shown, in one embodiment, the locking mechanism includes a bayonet 1205 in the groove 120, a retractable locking tongue 440 installed at the end of the handlebar 400, a first elastic member 441 located in the handlebar 400 for driving the locking tongue 440 to enter the bayonet 1205, a first pull wire 442 connected to the locking tongue 440, and a driving member 443 connected to the first pull wire 442 for driving the locking tongue 440 to disengage from the bayonet 1205.

[0146] The lock tongue 440 is extended into the bayonet 1205 to maintain the expanded state. The end of the handlebar 400 is provided with a slide groove 401 for accommodating the lock tongue 440. The lock tongue 440 slides in the slide groove 401. The bayonet 1205 is provided in the groove 120 at a position corresponding to the lock tongue 440. The connection state between the lock tongue 440 and the bayonet 1205 has two states: locked and unlocked.

[0147] In the locked state, the locking tongue 440 protrudes out of the slide slot 401 and extends into the bayonet 1205;

[0148] In the unlocked state, the locking tongue 440 exits the latch 1205 and retracts into the sliding groove 401 .

[0149] In order to effectively maintain the locked state and the automatic locking in the unfolded state, a first elastic member 441 is provided on the bottom surface of the slide groove 401. The extension direction of the first elastic member 441 is consistent with the sliding direction of the lock tongue 440. The lock tongue 440 extends into the lock tongue 440 by relying on the abutment of the first elastic member 441.

[0150] In order to prevent the locking tongue 440 from being completely separated from the slide slot 401, a waist-shaped groove 4401 is provided on the side wall of the locking tongue 440, and the length direction of the waist-shaped groove 4401 is consistent with the sliding square of the locking tongue 440. Accordingly, first through holes 402 adapted to the waist-shaped groove 4401 are provided on the two side walls of the slide slot 401, and a latch 444 is inserted through the waist-shaped groove 4401 and the first through hole 402 to limit the sliding position of the locking tongue 440. The interaction between the latch 444 and the first elastic member 441 enables the locking tongue 440 to extend into the bayonet 1205 without falling out of the slide slot 401.

[0151] A first pull wire 442 is fixedly bonded or bound to the bottom of the lock tongue 440 , and a driving member 443 is bound or glued to the other end of the first pull wire 442 . The driving member 443 is used for unlocking operation and is operated by an operator.

[0152] The unlocking operation is to toggle the driving member 443, and pull the lock tongue 440 back into the slide groove 401 through the first pull wire 442. At the same time, the lock tongue 440 exits the bayonet 1205. The driving member 443 is generally set at a position that is easy for the operator to reach, so as to facilitate the unlocking of the locking mechanism in the groove 120.

[0153] Combination Fig.17 The top of the locking tongue 440 near the bayonet 1205 is abutment 4402. When the folded state is changed to the unfolded state, the abutment 4402 preferentially contacts the groove 120. The abutment 4402 is arc-processed or bevel-designed, so that when the handle bar 400 changes from the folded state to the unfolded state, the groove 120 abuts against the arc surface or bevel of the abutment 4402, causing it to automatically retract into the slide groove 401. Continue to rotate, when the locking tongue 440 is aligned with the bayonet 1205, the first elastic member 441 is used to extend the locking tongue 440 into the bayonet 1205, completing the locking.

[0154] like Fig.19 and Fig. 20As shown, in one embodiment, the driving member 443 is a dial button slidably mounted on the outer wall of the handlebar 400, and the first pull wire 442 extends through the inside of the handlebar 400 until it passes through the handlebar 400 and is connected to the dial button.

[0155] The outer wall of the handlebar 400 is provided with a third guide groove 403, the dial button part extends into the third guide groove 403 and is slidably installed on the handlebar 400 in the form of a buckle, and the bottom of the handlebar 400 is provided with a first channel 404 for the pull wire to extend into the handlebar 400, the first channel 404 is connected to the slide groove 401, and the first pull wire 442 extends from the bottom of the lock tongue 440 into the handlebar 400 through the first channel 404, and extends all the way to connect and fix to the dial button. By toggling the dial button, pulling the traction wire, the lock tongue 440 is driven to exit the bayonet 1205, and the lock is released. In a preferred embodiment, the third guide groove 403 is set near the middle position or the upper part of the handlebar 400, so that the dial button is within the range that the operator can easily release, which is convenient for the lock release operation. In a further preferred embodiment, the third guide groove 403 is set below the handlebar 400, so that the dial button is covered by the handlebar 400, making the appearance more concise.

[0156] In one embodiment, in the unfolded state, the second hinge point 20 is located in the groove 120 .

[0157] The outer wall portion of the groove 120 is extended to cover the second hinge point 20 adjacent to the extension section 420 to prevent children from being pinched and to provide a more concise appearance.

[0158] In one embodiment, the top of the rear foot rod 200 has a bending section 220, and the handlebar rod 400 has a supporting boss 430 at a position adjacent to the second hinge point 20. In the unfolded state, the supporting boss 430 abuts against the bending section 220, and the abutting portion is located in the groove 120.

[0159] Since there is an assembly gap at the abutting portion, which is in an area easily accessible to children, the groove 120 covers the abutting portion and shields the assembly gap, so that children are prevented from being pinched by the gap.

[0160] like Figure 19~Figure 21 As shown, in another embodiment, the handlebar 400 is a telescopic rod, including a lower handlebar 460 and an upper handlebar 450 that are slidably connected, wherein the lower handlebar 460 is hinged to the front foot bar 100 and the rear foot bar 200 respectively.

[0161] The upper handlebar 450 is provided for the operator to hold with both hands. The upper handlebars 450 on both sides are connected at the top by the grip rod 410, which increases the holding area of ​​both hands and facilitates holding. The upper handlebar 450 is plugged into the inner wall or outer wall of the lower handlebar 460 to achieve relative sliding extension. The first hinge point 10 and the second hinge point 20 are located on the lower handlebar 460, so that the hinge point is close to the bottom, and the distance between the first hinge point 10 and the bottom of the front foot rod 100 and the distance between the first hinge point 10 and the top of the handlebar 400 are kept close. When the handlebar 400 rotates and folds around the first hinge point 10, the two distances are close, so that the folded volume is small.

[0162] Combination Fig.38 A cup holder 458 for placing a kettle is also inserted on the upper handle bar 450, so that the operator can take the kettle at any time.

[0163] like Fig. 22 As shown, in one embodiment, the upper handle bar 450 is installed with a retractable positioning pin 451, and the lower handle bar 460 is provided with a positioning pin hole 461 that cooperates with the positioning pin 451. When the positioning pin 451 is inserted into the positioning pin hole 461, the relative sliding of the lower handle bar 460 and the upper handle bar 450 is restricted.

[0164] The positioning pin 451 forms a sliding path when the upper handle bar 450 slides along the lower handle bar 460, and the positioning pin hole 461 is arranged on the sliding path, so that the positioning pin 451 can extend into the positioning pin hole 461 and restrict the sliding of the upper handle bar 450 when the upper handle bar 450 slides. The positioning pin hole 461 is arranged below the outer wall of the lower handle bar 460, so that the upper part of the outer wall of the lower handle bar 460 is always smooth without convex spots.

[0165] The upper handle bar 450 and the lower handle bar 460 rely on the mutual cooperation between the positioning pin 451 and the positioning pin hole 461, and have the following features:

[0166] In the locked state, when the upper handle bar 450 slides along the lower handle bar 460, the positioning pin 451 extends out of the positioning pin hole 461 and protrudes out of the lower handle bar 460, restricting the upper handle bar 450 from sliding further;

[0167] In the telescopic state, when the positioning pin 451 exits the positioning pin hole 461 , the upper handle bar 450 can slide and telescope along the lower handle bar 460 .

[0168] like Figure 22~Figure 25 As shown, in one embodiment, a second elastic member 452 for driving the positioning pin 451 to enter the positioning pin hole 461 is provided in the upper handle bar 450. A release switch and a sliding member 453 linked to the release switch are installed on the upper handle bar 450. The release switch and the sliding member 453 are connected by a second pull wire 457 to drive the positioning pin 451 to disengage from the positioning pin hole 461.

[0169] The second elastic member 452 is disposed at the bottom of the positioning pin 451 to keep the positioning pin 451 extending into the positioning pin hole 461. Generally, the second elastic member 452 is a spring. The sliding member 453 is a strip and can slide in the upper handlebar 450.

[0170] In a preferred embodiment, the sliding direction of the sliding member 453 is consistent with the sliding direction of the upper handle bar 450. The positioning pin 451 interacts with the sliding member 453, and when the sliding member 453 slides toward the grip bar 410, the positioning pin 451 is forced to exit the positioning pin hole 461. The connection method of the second pull wire 457 enables the release switch to be set at any position on the upper handle bar 450. In order to facilitate the operator to perform the release operation, the release switch is set on the grip bar 410 and is within easy reach of the operator.

[0171] The entire linkage process includes:

[0172] In the unlocking state, the release switch is toggled / pressed, and the second pull wire 457 pulls the sliding member 453 to slide, driving the positioning pin 451 to withdraw from the positioning pin hole 461, and at the same time compressing the second elastic member 452 to complete the unlocking.

[0173] In the locked state, the unlocking switch is released, and the second elastic member 452 rebounds to drive the positioning pin 451 into the positioning pin hole 461 to complete the locking.

[0174] In one embodiment, there are multiple positioning pin holes 461, which are arranged at intervals on the sliding path of the positioning pin 451, providing multiple levels of adjustment, so that the operator can adjust the handlebar 400 according to his or her own height.

[0175] In one embodiment, a third avoidance groove 4513 for installing the second elastic member 452 is provided at the top of the positioning pin 451 to limit the radial shaking of the second elastic member 452 so that the sliding and extension of the positioning pin 451 is more stable.

[0176] like Fig.38 and Fig.39 As shown, in another embodiment, a locking mechanism for keeping the frame 9 in the unfolded state is further included, and the sliding member 453 is released in conjunction with the locking mechanism.

[0177] The locking mechanism may adopt relevant parts of the above-mentioned embodiments, for example, the locking mechanism includes a bayonet 1205 opened on the front foot rod, a retractable locking tongue 440 installed at the end of the handlebar rod 400, a first elastic member 441 located in the handlebar rod 400 for driving the locking tongue 440 to enter the bayonet 1205, and a first pull wire 442 connected between the sliding member 453 and the locking tongue 440.

[0178] The linked release can simplify the release operation. In this method, the driving member 443 of the above embodiment can be omitted, and the release switch can be used to simultaneously realize the extension and extension release of the handlebar and the release of the frame.

[0179] In another embodiment, two unlocking driving modes can be configured at the same time, for example, the locking mechanism includes a bayonet 1205 opened on the front foot rod, a retractable locking tongue 440 installed at the end of the handlebar 400, a first elastic member 441 located in the handlebar 400 for driving the locking tongue 440 to enter the bayonet 1205, a first pull wire 442 connected to the locking tongue 440, and a driving member 443 connected to the first pull wire 442 for driving the locking tongue 440 to disengage from the bayonet 1205;

[0180] The driving member 443 and the sliding member 453 are relatively fixed and slidably mounted on the handlebar.

[0181] In this method, the driving member 443 is retained, and the driving member 443 and the unlocking switch are located at different positions of the frame. The user can choose a more convenient unlocking method according to the relative position between the user and the frame or the operating habits.

[0182] The driving member 443 is slidably mounted on the inner side wall of the lower handlebar 460 and slides along the sliding direction of the upper handlebar 450. Then, the entire unlocking operation of the frame 9 has the following features:

[0183] Unlocking operation a: Toggle the driving member 443 to drive the sliding member 453 to slide, pull the first pull line 442, so that the locking tongue 440 exits the bayonet 1205, and the frame 9 is folded. At the same time, the positioning pin 451 exits the positioning pin hole 461, the handlebar 400 is telescopically folded, and the frame 9 is folded.

[0184] Unlocking operation b: toggle / press the release switch, pull the second pull wire 457, drive the sliding member 453 to slide, and then pull the first pull wire 442, the positioning pin 451 withdraws from the positioning pin hole 461, the handlebar 400 is telescopically folded, and at the same time, the locking tongue 440 withdraws from the bayonet 1205, the frame 9 is folded, and finally, the entire vehicle is folded.

[0185] The first pull wire 442 is connected to the sliding member 453, and the sliding member can be controlled to slide by the second pull wire 457 or the driving member 443, so that the telescopic folding of the handlebar rod 400 and the folding of the frame 9 can be completed through one unlocking operation, eliminating the original two unlocking operations and facilitating use.

[0186] A limiting structure for limiting the travel of the sliding member 453 is provided in the upper handle bar 450 .

[0187] The limiting structure is used to limit the sliding of the sliding member 453, and the sliding member 453 has two extreme positions:

[0188] The first limit position limits the sliding member 453 to continue sliding into the hollow upper handlebar 450 in the pulling direction of the second pull wire 457;

[0189] The second limit position limits the sliding member 453 from escaping from the upper handle bar 450 .

[0190] like Fig.24 As shown, in one embodiment, the sliding member 453 is provided with a strip hole 4531 along its own moving direction. The limiting structure is a positioning member 454 fixed inside the upper handle bar 450, and at least a part of the positioning member 454 extends into the strip hole 4531.

[0191] The strip hole 4531 is rectangular, and a relief hole 4534 for the positioning member 454 to penetrate is provided on the side of the strip hole 4531 close to the upper handlebar 450, and a fourth elastic member 4533 (such as a spring) is installed in the strip hole 4531. When the second pull line 457 pulls the sliding member 453, the sliding member 453 slides toward the upper handlebar 450, and at the same time, the fourth elastic member 4533 is compressed by the positioning member 454 until it cannot be compressed and reaches the first limit position. When the second pull line 457 loses its pulling force, the fourth elastic member 4533 abuts against the positioning member 454 due to its rebound force, pushing the sliding member 453 to reset until the relief hole 4534 abuts against the positioning member 454 and reaches the second limit position.

[0192] like Figure 24~Figure 27 As shown, in one embodiment, a matching groove 4532 is formed on the sliding member 453 , the positioning pin 451 is sleeved on the sliding member 453 , and a portion of the positioning pin 451 is inserted into the matching groove 4532 .

[0193] The matching groove 4532 is provided on a side perpendicular to the movement direction of the sliding member 453. When the positioning pin 451 is locked, the opening position of the matching groove 4532 corresponds to the position of the second elastic member 452. The positioning pin 451 can be pressed against the bottom of the groove by the second elastic member 452 and extend into the positioning pin hole 461. The outer periphery of the positioning pin 451 is provided with a rectangular through hole 4511 which is sleeved on the sliding member 453 along its own axial direction, and the upper wall of the rectangular through hole 4511 is always pressed against the bottom or wall of the matching groove 4532 by the second elastic member 452.

[0194] The upper wall of the rectangular through hole 4511 and the groove bottom or groove wall are specifically matched as follows:

[0195] In the locked state, the positioning pin 451 extends into the positioning pin hole 461, and the upper wall of the rectangular through hole 4511 abuts against the bottom of the groove;

[0196] In the unlocking state, when the sliding member 453 slides to unlock, the groove wall of the matching groove 4532 abuts against the upper wall of the rectangular through hole 4511, and the positioning member 454 is lifted along its own sliding direction until it exits the positioning pin hole 461, completing the unlocking. Figure 24~Figure 27 The groove wall of the matching groove 4532 is an inclined surface, which is used to guide the positioning pin 451 to disengage from the positioning pin hole 461. The matching groove 4532 has two groove walls, and the side away from the upper handle bar 450 is an inclined surface, and the angle between the side wall and the groove bottom is an obtuse angle, so that the positioning pin 451 can slide smoothly and exit the positioning pin hole 461.

[0197] like Fig.28 As shown, in one embodiment, the release switch includes: a release member 4551 slidably mounted on the upper handlebar 450 and linked to the second pull wire 457, a locking member 4552 limiting the relative sliding of the release member 4551, and a button 4553 linked to the locking member 4552, the button 4553 and the locking member 4552 abutting against each other to release the lock of the release switch by the locking member 4552.

[0198] The release member 4551 is block-shaped and slidably mounted in the middle of the grip 410. The sliding direction of the release member 4551 is the radial direction of the grip 410. Two sliding blocks (not shown) are arranged symmetrically along the center line of the frame 9 inside the grip 410. The two sliding blocks can slide along the axial direction of the grip 410 and are respectively connected to the second pull wires 457 on both sides. The sliding blocks and the release member 4551 are in contact with each other and the contact surface is an inclined surface. The bottom of the release member 4551 is provided with a fourth mounting hole 602. The locking member 4552 is columnar with a step at the bottom and is slidably embedded in the fourth mounting hole 602. A pin hole 4554 is provided in the grip 410 to match the step of the locking member 4552. After assembly, the locking member 4552 extends from top to bottom into the pin hole 4554 in the grip 410 to limit the sliding of the release member 4551 and prevent the release member 4551 from being accidentally touched to cause the handle bar 400 to be telescopically folded. In order to keep the release member 4551 restricted, a third elastic member 4555 (such as a spring) is provided in the fourth mounting hole 602. The third elastic member 4555 is used to abut against the locking member 4552 and drive the locking member 4552 to extend into the pin hole 4554. The button 4553 is slidably mounted on the lower part of the grip 410 by a buckle connection and abuts against the step of the locking member 4552.

[0199] When the button 4553 is pressed, the locking member 4552 is pushed out of the pin hole 4554 and the third elastic member 4555 is compressed. At this time, the release member 4551 can slide relative to the grip bar 410. The release member 4551 is pressed to slide toward the inside of the grip bar 410, and the sliding block is pushed to slide toward the center line of the frame 9 by relying on the inclined surface of the sliding block. The sliding block pulls the second pull wire 457, driving the positioning pin 451 to withdraw from the positioning pin hole 461, and the handlebar 400 is telescopically folded at the grip bar 410.

[0200] like Fig.29 As shown, in one embodiment, a head 456 is fixed to the bottom end of the upper handlebar 450 and is located inside the lower handlebar 460, and a first guide groove 4563 and a second guide groove 4564 that are interconnected are opened inside the head 456, wherein the positioning pin 451 is slidably installed in the first guide groove 4563, and the sliding member 453 is slidably installed in the second guide groove 4564.

[0201] The end cap 456 is divided into a lower end cap 4562 and an upper end cap 4561. The outer periphery of the lower end cap 4562 is adapted to the inner wall of the lower handlebar 460 and forms a clearance fit. The upper end cap 4561 is adapted to the inner wall of the upper handlebar 450. The end cap 456 is inserted into the upper handlebar 450 through the upper end cap 4561 and fixed by the positioning member 454. The upper handlebar 450 is guided by the clearance fit between the lower end cap 4562 and the lower handlebar 460. The end cap 456 also guides the positioning pin 451 and the sliding member 453. The inner wall of the first guide groove 4563 is adapted to the positioning pin 451. The positioning pin 451 can slide along the inner wall of the first guide groove 4563, thereby improving the sliding stability of the positioning pin 451 and reducing the occurrence of failures. At the same time, the second elastic member 452 is installed in the first guide groove 4563. The second guide groove 4564 is opened along the sliding direction of the sliding member 453 and extends to the bottom. The inner wall of the second guide groove 4564 is adapted to the outer periphery of the sliding member 453, and the second guide groove 4564 is opened with a fourth avoidance groove 4566 extending to the positioning member 454 for the installation of the second elastic member 452, so as to facilitate the assembly of the second elastic member 452.

[0202] The end cap 456 replaces the upper handle bar 450 to complete the sliding guide of the positioning pin 451, the sliding member 453 and the upper handle bar 450, so that the upper handle bar 450 can be processed into a hollow rod by simple injection molding or other processes, which is convenient for processing and saves raw materials.

[0203] like Fig.25 and Fig.29As shown, in one embodiment, the baby stroller has a locking mechanism for keeping the frame 9 in the unfolded state, and a driving member 443 is installed at the top of the lower handlebar 460 and at a position beyond the end cap 456, and the driving member 443 controls the locking mechanism to unlock through the first pull wire 442. A first wire groove 4512 for avoiding the first pull wire 442 is opened on the positioning pin 451.

[0204] Since the position of the driving member 443 is closer to the grip 410 than the end cap 456, a first wire groove 4512 is provided on the side of the positioning pin hole 461 of the positioning pin 451, and similarly, a second wire groove 4565 having the same cross-sectional shape as the wire groove is provided on the side of the end cap 456 close to the positioning pin hole 461. The first pull wire 442 passes through the first and second wire grooves 4565 for easy assembly.

[0205] like Fig.30 As shown, in another embodiment, the baby stroller is further provided with an adapter 600 for movably plugging in the seat 8 , the rear side of the adapter 600 is hinged to the rear foot rod 200 , and the front side of the adapter 600 is hinged to the connecting rod 300 via the support rod 500 .

[0206] The adapter 600 is used to connect the seat 8 to achieve a detachable connection of the seat 8 and facilitate storage and folding of the frame 9.

[0207] The adapter 600 is movably connected to the frame 9 through the support rod 500 and its own hinge structure, and changes with the unfolding / folding of the baby stroller. After folding, it can be hidden in the frame 9 to reduce the volume after folding.

[0208] The bottom of the seat 8 is provided with a socket matched with the adapter 600, and the seat 8 can be quickly installed through the adapter 600 and the socket.

[0209] The support rod 500 is plate-shaped, and its thickness is reduced to avoid folding interference with other parts.

[0210] like Fig.30 and Fig.31 As shown, in this embodiment, the adapter 600, the connecting rod 300, the supporting rod 500 and the rear foot rod 200 constitute a deformable four-bar linkage.

[0211] During the change process of the four-bar linkage from the unfolded state to the folded state, the three hinge points where the adapter 600 and the support rod 500 are hinged gradually form a straight line, that is, the line connecting the above three hinge points is a triangle. In the folded state, one of the angles α of the triangle is less than 10°, and the three hinge points are roughly collinear. When viewed from the side, the adapter 600 is within the range of the front foot rod 100 and the rear foot rod 200, reducing the folded volume.

[0212] like Fig.32As shown, in one embodiment, the connecting rod 300 is L-shaped, including a transverse section 310 and an upward section 320 connected to each other. The end of the transverse section 310 is connected to the front foot rod 100 at a third hinge point 30, and the end of the upward section 320 is connected to the rear foot rod 200 at a fourth hinge point 40. The support rod 500 is hinged to the middle part of the transverse section 310.

[0213] Since the connecting rod 300 itself is connected with three hinge points, and the three hinge points are all stress points of the frame 9, the connecting rod 300 is L-shaped rather than a straight rod shape, which increases the deformation resistance. The horizontal section 310 and the upward section 320 are an integrated structure with high structural strength, which is conducive to saving materials. In a preferred embodiment, the connecting rod 300 is assembled by a connecting rod shell 330 and a connecting rod skeleton 340, and the connecting rod shell 330 is recessed with an L-shaped groove 331, and the connecting rod skeleton 340 is embedded in the L-shaped groove 331 and connected through three hinge points. The connecting rod shell 330 and the connecting rod skeleton 340 can be made of different materials, and the connecting rod skeleton 340 is used to enhance the structural strength of the connecting rod 300.

[0214] like Fig.30 As shown, in one embodiment, the connecting rod 300 and the rear foot rod 200 are connected at the fourth hinge point 40. The adapter 600 and the rear foot rod 200 are connected at the fifth hinge point 50. The fourth hinge point 40 and the fifth hinge point 50 are adjacent to each other, and the fifth hinge point 50 is closer to the front side of the frame 9.

[0215] Since the fourth and fifth hinge points 50 are stress points and are both fixed on the rear foot rod 200, the fourth hinge point 40 and the fifth hinge point 50 are close to each other, which makes the hinge structure more compact on the one hand, and concentrates the stress points on the other hand, thereby enhancing the stability of the frame 9 by strengthening the structural strength of the rear foot rod 200 at the stress points, and facilitating the structural design of the rear foot rod 200. If the fifth hinge point 50 intersects the fourth hinge point 40 and is closer to the rear side of the frame 9, the upward section 320 of the connecting rod 300 is located in the middle or front part of the adapter 600, and the adapter 600 covers the fourth hinge point 40 during assembly, affecting assembly. Therefore, the fifth hinge point 50 is closer to the front side of the frame 9, so that the fourth hinge point 40 is exposed and the adapter 600 and the connecting rod 300 do not overlap each other, which is convenient for assembly.

[0216] like Figure 30~Figure 33 As shown, in one embodiment, the top of the rear leg bar 200 has a bending section 220 so that the rear leg bar 200 in the folded state is close to the front leg bar 100. The fourth hinge point 40 and the fifth hinge point 50 are both near the inflection point of the bending section 220.

[0217] The fourth hinge point 40 is located on the side of the inflection point close to the bending section 220, and the fifth hinge point 50 is located on the side of the inflection point away from the bending section 220, so that when folded, the connecting rod 300 and the adapter 600 cannot interfere with each other. The fourth hinge point 40 and the fifth hinge point 50 are located on the inner side of the bending section 220, making the appearance more concise.

[0218] In the folded state, when viewed from the side, the rear foot rod 200 and the handlebar rod 400 rely on the bending section 220 to form a storage space for accommodating the front foot rod 100, so that the volume after folding is further reduced, and the adapter 600 is also in the storage space to avoid protruding from the frame 9.

[0219] like Figure 30~Figure 33 As shown, in one embodiment, each side frame 1 is provided with an adapter 600 , and the two adapters 600 are connected by a cross bar 700 .

[0220] There are two adapters 600, which are symmetrically arranged on the inner side of the side brackets, providing support on both sides of the seat 8, making the child more stable when sitting. The crossbar 700 is a hollow circular tube, which is horizontally inserted and fixed on the adapters 600 on both sides, and is used to support the middle part of the seat 8 to improve the riding comfort of the child. The crossbar 700 is arranged in the concentrated arrangement area of ​​the hinge point and is located in the middle position of the frame 9, further limiting the shaking of the frame 9 along both sides.

[0221] A mounting seat 601 is provided on the inner wall of the adapter 600, and a fourth mounting hole 602 adapted to the outer wall of the cross bar 700 is opened on the mounting seat 601. Both ends of the cross bar 700 are inserted into the fourth mounting holes 602 on both sides and the cross bar 700 and the adapter 600 are fixed by fasteners to complete the assembly of the cross bar 700 and the adapter 600.

[0222] like Fig.30 As shown, in one embodiment, the adapter 600 is connected to the support rod 500 at the sixth hinge point 60. The cross bar 700 is located between the fifth hinge point 50 and the sixth hinge point 60.

[0223] Since most of the force of the seat 8 acts on the crossbar 700, the crossbar 700 is located between the fifth hinge point 50 and the sixth hinge point 60 when viewed from the side, so that the force can be roughly evenly distributed on the fifth and sixth hinge points 60, avoiding excessive force on one hinge point and causing damage during use, affecting the product life and child safety. In a preferred embodiment, the crossbar 700 is located at the midpoint of the line connecting the fifth and sixth hinge points 60, so that the force on the fifth and sixth hinge points 60 is roughly the same.

[0224] like Fig.30As shown, in one embodiment, the fifth hinge point 50 and the sixth hinge point 60 are both located between the second hinge point 20 and the fourth hinge point 40 .

[0225] In the unfolded state, since the second and fourth hinge points 40 are both located on the rear foot rod 200, the fifth and sixth hinge points 60 are located between the second and fourth hinge points 40, so that the forces from the seat 8 are all concentratedly transmitted to the rear foot rod 200 through the adapter 600. The structure of the rear foot rod 200 is strengthened, thereby improving the stability of the frame 9.

[0226] In one embodiment, the handlebar 400 and the front foot bar 100 are on the same straight line, and the portion of the handlebar 400 between the first hinge point 10 and the second hinge point 20 is an extension section 420, which is hidden inside the front foot bar 100 or located on the inner side of the front foot bar 100.

[0227] The extension section 420 is used to connect the first hinge point 10 and the second hinge point 20, and can be assembled to the bottom of the handlebar 400 as a separate part, or can be integrally formed from the handlebar 400. The extension section 420 overlaps with the front foot bar 100, so that the force points of the first hinge point 10 and the second hinge point 20 are located at the overlapping part of the extension section 420 and the front foot bar 100, which improves the structural strength of the side frame 1 compared to the existing single force-bearing rod. And when hidden inside or on the inner side of the front foot bar 100, the appearance is more concise.

[0228] like Fig.34 As shown, in one embodiment, the top of the rear foot rod 200 has a bending section 220 so that the rear foot rod 200 is close to the front foot rod 100 in the folded state. The rear foot rod 200 includes a rear foot frame 240 and a rear foot shell 230 wrapped around the rear foot frame 240, and at least a portion of the rear foot frame 240 is in the bending section 220.

[0229] The rear foot shell 230 is provided with a third avoidance groove 4513, and the inner wall shape of the third avoidance groove 4513 is adapted to the rear foot frame 240, so that the rear foot frame 240 does not protrude from the rear foot shell 230 after being inserted and installed, avoiding interference with the rotation of the inner connecting rod 300 or the adapter 600, and the appearance is more concise. The rear foot frame 240 is used to bear part of the force acting on the rear foot rod 200, so a part of the rear foot frame 240 is located in the bending section 220, which enhances the bearing capacity of the bending section 220.

[0230] A rear foot cross bar 250 is also provided between the rear foot rods 200 on both sides, which is fixed by plugging, to limit the shaking of the rear foot rods 200 on both sides and improve the stability of the frame 9. A brake pedal is provided in the middle of the rear foot rod 200, and correspondingly, a brake system (not shown) linked to the brake pedal is provided on the inner side of the rear wheel, which is convenient for the operator to step on and use.

[0231] like Fig.34 As shown, in one embodiment, the hindfoot shell 230 at least wraps around the outside of the hindfoot skeleton 240 .

[0232] The third avoidance groove 4513 is arranged on the inner wall of the rear foot shell 230, so that the rear foot shell 230 can wrap the outer side of the rear foot frame 240, and the outer side of the rear foot rod 200 has no assembly gap, a smooth surface, and a simpler appearance.

[0233] like Fig.34 As shown, in one embodiment, a portion of the rear foot frame 240 is located in the bending section 220 , and another portion extends from the inflection point of the bending section 220 to a side away from the front foot rod 100 .

[0234] The shape of the side projection of the rear foot frame 240 is similar to that of the rear foot shell 230, and it extends a certain distance from the inflection point to the bending section 220 and the rear wheel direction, so that the other surfaces of the rear foot frame 240 except the inner wall are all wrapped by the rear foot shell 230, which makes the appearance more concise on the one hand, and disperses part of the force on the other hand, and enhances the anti-deformation ability of the rear foot rod 200. Since the rear foot rod 200 is the main load-bearing member, the rear foot frame 240 and the rear foot shell 230 can be made of different materials, so as to improve the structural strength of the rear foot rod 200.

[0235] In one embodiment, the connecting rod 300 is connected to the rear foot rod 200 at the fourth hinge point 40, the adapter 600 is connected to the rear foot rod 200 at the fifth hinge point 50, and the second hinge point 20, the fourth hinge point 40, and the fifth hinge point 50 are all located on the rear foot shell 230.

[0236] The rear foot frame 240 is nested in the rear foot shell 230, so the front foot rod 100, the connecting rod 300 and the adapter 600 associated with the second, fourth and fifth hinge points 50 only need to be connected to the rear foot shell 230, which is convenient for assembly.

[0237] like Fig.35 As shown, in one embodiment, a plurality of mounting platforms 231 extending toward the inner side of the side frame 1 are provided on the rear leg housing 230, and corresponding mounting platforms 231 are arranged at the fourth hinge point 40 and the fifth hinge point 50 for passing corresponding pivots.

[0238] The bottom of the second avoidance groove 1401 of the rear foot shell 230 is provided with a mounting platform 231 in the projection direction of the side frame 1. There are two mounting platforms 231, and both are provided with a circular hole 232 for passing a pivot to hinge the adapter 600 and the connecting rod 300 on the rear foot shell 230. The two mounting platforms 231 are connected in the second avoidance groove 1401 to increase the structural strength. The height of the mounting platform 231 exceeds the outer wall of the rear foot frame 240 to avoid interference and friction between the adapter 600 and the connecting rod 300 and the rear foot rod 200 after assembly, which affects the smoothness of folding.

[0239] In one embodiment, a relief area 241 corresponding to the position of each mounting platform 231 is formed on the rear leg frame 240 at the inflection point of the bending section 220 .

[0240] Since the height of the mounting platform 231 is higher than the outer wall of the rear leg frame 240 , the design of the avoidance area 241 facilitates the installation of the rear leg frame 240 .

[0241] In one embodiment, the inner edge of the avoidance area 241 is smooth, and at least a portion of the outer peripheral wall of each mounting platform 231 is in contact with the inner edge of the avoidance area 241 .

[0242] The inner edge of the avoidance area 241 is in a waist shape that is adapted to the outer shape of the two mounting platforms 231 and is close to each other, thereby reducing the installation gap and effectively transmitting the force acting on the mounting platforms 231 to the rear foot frame 240, thereby increasing the bearing capacity of the rear foot rod 200.

[0243] In one embodiment, the handlebar 400 has a supporting boss 430 at a position adjacent to the second hinge point 20. In the unfolded state, the supporting boss 430 abuts against the bent section 220, and the rear leg frame 240 at least extends to the abutting position.

[0244] The bending section 220 connects multiple hinge points and abuts the support boss 430, so the action force of the front foot rod 100 and the handlebar rod 400 is transmitted to the bending section 220 via the support boss 430, and the action force of the seat 8 is transmitted to the bending section 220 through the adapter 600. Therefore, the rear foot frame 240 at least extends to the abutment position, and bears the action force together with the rear foot shell 230, thereby improving the bearing capacity of the rear foot rod 200.

[0245] like Fig.36 and Fig.37 As shown, in one embodiment, the rear foot housing 230 is clamped at both sides of the bottom end of the handlebar rod 400 at the second hinge point 20, and a second pivot 234 is penetrated through the clamping position.

[0246] Since the second hinge point 20 is the hinge point of the handle bar 400 and the rear foot bar 200, and the handle bar 400 and the rear foot bar 200 are relatively long, they are prone to shaking during the folding process, so the rear foot shell 230 is provided with two symmetrical support arms 233 with second through holes 235 at the clamping position, the handle bar 400 is inserted between the two support arms 233, the second pivot 234 passes through the second through hole 235 and relatively fixes the handle bar 400 and the rear foot bar 200, and the axis point of the second pivot 234 is the second hinge point 20. The two ends of the second pivot 234 are supported by the support arms 233 on both sides, so that the handle bar 400 and the rear foot bar 200 are more stable when rotating and folding.

[0247] The working principle of the present invention is as follows: first, the seat 8 is disassembled from the adapter 600 and separated from the frame, and the release member 4551 of the handlebar 400 is pressed, and the second pull wire 457 pulls the sliding member 453 and drives the positioning pin 451 to exit the positioning pin hole 461. At the same time, the sliding member 453 drives the first pull wire 442 to pull the lock tongue 440 out of the bayonet 1205, and the frame 9 is folded. Then, the handlebar 400 rotates counterclockwise with the first hinge point 10 as the rotation center to approach the front foot rod 100, and the rear foot rod 200 relies on the pulling rotation of the connecting rod 300 to continuously approach the front foot rod 100, until the handlebar 400, the front foot rod 100, the rear foot rod 200 and the connecting rod 300 are folded into a nearly flat shape, and the folding is completed. Of course, the driving member 443 can also be toggled to perform the unlocking operation.

[0248] When in use, the handlebar rod 400 is rotated clockwise around the first hinge point 10 to move away from the front foot rod 100, driving the rear foot rod 200 to move away from the front foot rod 100, and the connecting rod 300 is gradually unfolded until the locking tongue 440 extends into the bayonet 1205 to automatically complete the locking, and the handlebar rod 400 is pulled out and automatically extends into the locating pin hole 461 by relying on the locating pin 451 to complete the unfolding, and finally the seat 8 is aligned and assembled with the adapter seat on the frame, and it can be used.

[0249] During use, the release member 4551 is used to adjust the positioning pin 451 to extend into the positioning pin hole 461 at different positions, thereby adjusting the height of the upper handle bar 450 .

[0250] Since the first hinge point of the baby stroller of the present invention is higher than the second hinge point, the distance between the rear foot rod and the connecting rod is smaller than that of the traditional structure, so the four-link mechanism in the middle part is more compact and has a simpler shape.

[0251] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0252] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A baby stroller, characterized in that: The invention comprises a frame and a seat installed on the frame, wherein the frame comprises two symmetrically arranged side frames, each side frame comprises a handlebar, a front footbar, a connecting rod and a rear footbar which are hinged in sequence to form a foldable four-bar linkage mechanism, the hinge point between the handlebar and the front footbar is a first hinge point, the hinge point between the handlebar and the rear footbar is a second hinge point, the hinge point between the connecting rod and the front footbar is a third hinge point, the hinge point between the connecting rod and the rear footbar is a fourth hinge point, in the unfolded state of the baby stroller, the position of the first hinge point is higher than the position of the second hinge point, the first hinge point, the second hinge point and the third hinge point are roughly collinear, and the connecting rod is L-shaped, and the handlebar, the front footbar, the connecting rod and the rear footbar form a concave pentagon; In the unfolded state, the second hinge point and the third hinge point are adjacent to each other, and when folded, the handlebar and the rear foot rod respectively rotate from both sides of the front foot rod to the front foot rod, and the first hinge point and the fourth hinge point first move away from each other and then move toward each other, and in the folded state, the second hinge point and the third hinge point move away from each other; Taking the line between the first hinge point and the fourth hinge point as a reference line, in the unfolded state, the second hinge point and the third hinge point are on the same side of the reference line, and in the folded state, the second hinge point and the third hinge point are respectively on both sides of the reference line.

2. The baby stroller according to claim 1, characterized in that: The handlebar rod and the front foot rod are supported against each other at a position between the first hinge point and the second hinge point, and the supporting manner is at least one of the following manners: Mode a, when the handlebar is unfolded around the first hinge point to the extreme position, it abuts against the front foot bar; Mode b: the handlebar rod and the front foot rod abut against each other along the width direction of the frame.

3. The baby stroller according to claim 2, characterized in that: The angle between the line between the first hinge point and the second hinge point and the front foot rod is 0°~15°.

4. The baby stroller according to claim 1, characterized in that: The top of the rear foot rod has a bending section so that the rear foot rod is close to the front foot rod in the folded state.

5. The baby stroller according to claim 4, characterized in that: The handlebar has a supporting boss at a position adjacent to the second hinge point, and in the unfolded state, the supporting boss abuts against the bent section.

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