CN114056412B

CN114056412B - Baby stroller

Info

Publication number: CN114056412B
Application number: CN202010898788.8A
Authority: CN
Inventors: 赵国松
Original assignee: Shaoxing Shangyu Rixing Hardware Products Co Ltd
Current assignee: Shaoxing Shangyu Rixing Hardware Products Co Ltd
Priority date: 2020-07-31
Filing date: 2020-08-31
Publication date: 2025-03-14
Anticipated expiration: 2040-08-31
Also published as: CN213799843U; CN114056412A; CN213799844U; CN212500618U; CN213768690U; CN213768689U

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

Baby carriage

Technical Field

The invention relates to the field of strollers, in particular to a more concise-modeling stroller.

Background

The baby carriage is a tool carriage which is designed for facilitating outdoor activities of babies and is generally provided with a front foot rod, a rear foot rod and a handle rod, and is provided with a folding function for convenience in carrying, for example, a baby carriage frame folding joint, a baby carriage frame and a baby carriage are disclosed in Chinese patent literature with a publication number of CN 209700773U, the three rods are rotationally folded only by means of a single hinge structure, and the hinge structure is also connected with a seat for bearing the babies, but the rotating structure is relatively complex and has potential safety hazards. For example, chinese patent document CN 2186194Y discloses a foldable stroller, which includes a handlebar tube, a front foot tube, a seat tube and a rear foot tube, which are hinged in sequence, and they form a foldable four-bar mechanism, and the four-bar mechanism occupies a larger proportion of the whole frame, and has an unclean shape.

Disclosure of Invention

The invention provides a baby stroller, which solves the problem that the existing baby stroller is not compact in modeling.

The utility model provides a baby stroller, includes the frame and installs the seat on the frame, the frame includes the side frame that two symmetries set up, and every side frame is including articulated handlebar pole, preceding foot pole, connecting rod and the back foot pole that constitutes a folding four bar linkage in proper order, the pin joint between handlebar pole and the preceding foot pole is first pin joint, the pin joint between handlebar pole and the back foot pole is the second pin joint, under baby stroller expansion state, the position of first pin joint is higher than the position of second pin joint, handlebar pole and back foot pole rotate respectively from the both sides of preceding foot pole and draw close to forward foot pole when folding.

The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.

Optionally, the handle bar and the forefoot bar are supported by mutual abutment at the position between the first hinge point and the second hinge point, and the abutment mode is at least one of the following modes:

in the mode a, the handle rod is propped against the front foot rod when being unfolded to a limit position around the first hinging point;

in the mode b, the handle bar and the front foot bar are abutted against each other along the width direction of the frame.

Optionally, an included angle between the connecting line between the first hinge point and the second hinge point and the front foot rod is 0-15 degrees.

Optionally, the hinge point between the connecting rod and the forefoot lever is a third hinge point, and the first hinge point, the second hinge point and the third hinge point are substantially collinear.

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

in the unfolded state, the second hinge point and the third hinge point are positioned on the same side of the reference line, and in the folded state, the second hinge point and the third hinge point are positioned on two sides of the reference line respectively.

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

in contrast, the second hinge point and the third hinge point are remote from each other in the folded state.

Optionally, during the folding process, the first hinge point and the fourth hinge point are firstly far away from each other and then approach each other.

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

Optionally, the handle bar has a support boss adjacent to the second hinge point, and in the unfolded state, the support boss abuts against the bending section.

Optionally, the connecting rod is L-shaped, and in the unfolded state, the handle bar, the front foot bar, the connecting rod and the rear foot bar enclose a concave pentagon.

Because the first hinge point is higher than the second hinge point, the distance between the rear foot rod and the connecting rod is smaller compared with the distance between the rear foot rod and the connecting rod in the traditional structure, the four-bar mechanism in the middle of the baby stroller is more compact, and the baby stroller is simpler in shape.

Drawings

FIG. 1 is a schematic view of a stroller in an embodiment;

FIG. 2 is a perspective view of a stroller;

FIG. 3 is a cross-sectional view of the frame;

FIG. 4 is another state diagram of FIG. 3;

FIG. 5 is another state diagram of FIG. 3;

FIG. 6 is a schematic view of the forefoot housing of FIG. 3 with the forefoot housing removed;

Fig. 7 is an enlarged view of the portion B in fig. 6;

FIG. 8 is an exploded view of the front foot bar and the handle bar of the stroller;

FIG. 9 is a schematic view of the assembly of the front foot bar and the handlebar of the stroller;

FIG. 10 is an exploded view of the front foot bar of the stroller;

fig. 11 is an enlarged view of a portion C in fig. 8;

fig. 12 is an enlarged view of a portion D in fig. 8;

FIG. 13 is a schematic view of a stroller in a collapsed condition;

fig. 14 is an enlarged view of the portion E in fig. 13;

FIG. 15 is a cross-sectional view of a recess and extension in the stroller;

FIG. 16 is another schematic view of FIG. 11;

FIG. 17 is another schematic view of FIG. 12;

FIG. 18 is a cross-sectional view showing a locked state of a handle bar and a groove in the stroller;

FIG. 19 is a schematic view showing a developed state of a handle bar in the stroller;

FIG. 20 is a schematic view showing a folding state of a handle bar in the stroller;

FIG. 21 is a cross-sectional view of the handle bar of the stroller in a folded configuration;

FIG. 22 is a cross-sectional view of the handle bar locking structure of the stroller;

FIG. 23 is an exploded view of the handle bar locking mechanism of the stroller;

FIG. 24 is a perspective view of a slider in the stroller;

FIG. 25 is a perspective view of the locating pin in the stroller;

FIG. 26 is a cross-sectional view of the handle bar locking structure of the stroller;

FIG. 27 is another state diagram of FIG. 26;

FIG. 28 is a cross-section of the structure of the release switch in the stroller;

FIG. 29 is a perspective cross-sectional view of a closure head in the stroller;

FIG. 30 is a cross-sectional view of a frame of another embodiment;

FIG. 31 is a schematic view of the folded state of FIG. 30;

FIG. 32 is an exploded view of the links of the stroller;

FIG. 33 is a perspective view of FIG. 30;

FIG. 34 is an exploded view of the rear foot bar of the stroller;

Fig. 35 is an enlarged view of the H portion in fig. 34;

FIG. 36 is an exploded view of the handle bar and rear foot bar of the stroller;

FIG. 37 is an enlarged view of section I of FIG. 36;

FIG. 38 is a schematic view of a handle bar in a stroller in accordance with another embodiment;

fig. 39 is a schematic view of the connection of the first pull wire and the slider in the stroller.

Reference numerals in the drawings are described as follows:

1. the side frame, 7, the basket, 8, the seat, 9, the frame;

100. front foot bars, 110, front wheels;

120. groove 1201, first avoiding groove 1202, avoiding port 1203, arc slideway 1204, second mounting hole 1205 and bayonet;

130. 1301, the first mounting hole;

140. A front foot shell 1401, a second avoiding groove 141 and a front foot pedal;

150. a first pivot;

200. Rear foot bar, 210, rear wheel, 220, bending section;

230. The rear foot shell, 231, the mounting table, 232, the round hole, 233, the supporting arm, 234, the second pivot, 235 and the second through hole;

240. 241, avoidance zone;

250. a rear foot rail;

300. The connecting rod, 310, the transverse section, 320, the upwarp section;

330. 331, L-shaped grooves;

340. A connecting rod skeleton;

400. The handle comprises a handle rod, 401, a chute, 402, a first through hole, 403, a third guide groove, 404 and a first channel;

410. the holding rod, 420, an extension section, 421, a guide step, 422, a third mounting hole;

430. a support boss;

440. spring bolt, 4401, waist-shaped groove, 4402, abutting part

441. First elastic piece 442, first pull wire 443, driving piece 444 and bolt;

450. a handle bar is arranged on the upper part;

451. The positioning pin, 4511, a rectangular through hole, 4512, a first wire slot, 4513 and a third avoidance slot;

452. a second elastic member;

453. 4531, a bar-shaped hole, 4532, a matching groove, 4533, a fourth elastic element, 4534, and a avoidance hole;

454. A positioning piece;

4551. release the locking part, 4552, locking part, 4553, button;

4554. 4555, third elastic member;

456. 4561, upper closure, 4562, lower closure, 4563, first guide slot, 4564, second guide slot, 4565, second slot, 4566, fourth avoidance slot;

457. A second pull wire;

458. Cup holder;

460. 461, positioning pin holes;

500. a support rod;

600. Adapter 601, mounting seat 602, fourth mounting hole;

700. A cross bar;

10. A first hinge point; 20, a second hinge point, 30, a third hinge point, 40, a fourth hinge point, 50, a fifth hinge point, 60, a sixth hinge point;

Alpha, included angle.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the present disclosure, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implicitly indicating the number, order of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

Referring to fig. 1-3, the present embodiment provides a stroller, which includes a frame 9 and a seat 8 mounted on the frame 9, the frame 9 includes two symmetrically arranged side frames 1, each side frame 1 includes a handlebar 400, a front foot bar 100, a connecting rod 300 and a rear foot bar 200 which are sequentially hinged to form a foldable four-bar mechanism, a hinge point between the handlebar 400 and the front foot bar 100 is a first hinge point 10, a hinge point between the handlebar 400 and the rear foot bar 200 is a second hinge point 20, in a stroller unfolding state, the first hinge point 10 is higher than the second hinge point 20, and the handlebar 400 and the rear foot bar 200 are respectively rotated toward the front foot bar 100 from two sides of the front foot bar 100 when folding.

The stroller of the present application has a deployment and a collapsed configuration, with respect to height, that can be combined with the view of all wheels on a level ground in the deployed configuration, such as fig. 3, and a collapsed configuration, such as the handlebar 400 being adjacent to the forefoot bar 100 until interference with the forefoot bar 100 is not continued, such as fig. 5.

The side brackets are arranged symmetrically on both sides (the relative positional relationship is emphasized here, and the complete agreement of the structural details of the two is not limited), and each of the side brackets includes a handle bar 400, a front foot bar 100, a connecting rod 300, and a rear foot bar 200.

The handle bar 400, the front foot bar 100, the rear foot bar 200 and the link 300 form a four-bar linkage mechanism by means of which the handle bar 400, the front foot bar 100, the rear foot bar 200 and the link 300 are rotated and pulled with each other during the unfolding/folding process, thereby achieving the unfolding and folding of the entire vehicle.

The first hinge point 10 is not at the lowest position of the handlebar 400, but slightly deviates upward again, and the position of the handlebar 400 is hinged with the top of the front foot bar 100, and the position of the handlebar 400 below the first hinge point 10 further extends obliquely downwards along the front foot bar 100, and the bottom of the handlebar 400 is hinged with the top of the rear foot bar 200 to form a second hinge point 20. Compared with the existing baby carriage with only one hinge point, the baby carriage is provided with a plurality of hinge points, so that the structure of each hinge point is simple, the structural stability is improved, and folding faults are avoided or the baby carriage cannot be used.

Referring to fig. 3 to 5, in order to facilitate understanding of the folding change, taking the example that the front foot bar 100 is fixed in a space position, the handle bar 400 rotates counterclockwise around the first hinge point 10 and continuously approaches the front foot bar 100, meanwhile, the handle bar 400 in a rotating motion drives the second hinge point 20 to move, and correspondingly, the rear foot bar 200 rotates around the second hinge point 20 and continuously approaches the front foot bar 100 by means of the traction of the connecting rod 300, and finally, the front foot bar is folded into a flat shape, thereby being convenient to store and carry.

The seat 8 is used for carrying babies and children, can be a detachable independent component, does not affect the riding function even after being detached, and can also be a cloth cover arranged on the frame 9.

To achieve movement and steering, in one embodiment, the bottom of the forefoot bar 100 is provided with front wheels 110, which front wheels 110 may be universal wheels. The bottom end of the rear foot bar 200 is provided with a rear wheel 210, the rear wheel 210 may be a directional 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 track of the front wheel 110 may be smaller (or larger) than the track of the rear wheel 210.

In one embodiment, a basket 7 for placing articles is arranged below the seat 8.

The position of the first hinge point 10 is higher than the position of the second hinge point 20, so that the handlebar 400 and the front foot bar 100 can be further prolonged under the condition that the overall height of the frame 9 is unchanged, so that at least a part of the two can interact with each other, and the stability of the frame 9 is improved, for example in one embodiment,

The handle bar 400 and the front foot bar 100 are supported against each other at the position between the first hinging point 10 and the second hinging point 20, and the supporting manner is at least one of the following manners:

mode a, the handlebar 400 is unfolded about the first hinge point 10 to the extreme position against the forefoot lever 100;

In the mode b, both the handlebar 400 and the front foot bar 100 are abutted against each other in the frame width direction.

In order to further improve the safety and eliminate the hidden danger of clamping injury, the structure which is abutted against each other in the preferred embodiment is shown as partial mutual inclusion, namely, the interaction bearing part adopts a hidden mode.

As shown in fig. 3, in one embodiment, the angle α between the line between the first hinge point 10 and the second hinge point 20 and the forefoot lever 100 is not greater than 45 °.

When the included angle alpha is considered, the front foot bar 100 can be similar to a straight bar or the whole extending trend is emphasized, when the shape of the front foot bar 100 is further complicated, only the part adjacent to the first hinging point 10 can be focused, and the included angle alpha is not more than 45 degrees, so that the second hinging 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 line connecting the first hinge point 10 and the second hinge point 20 and the forefoot lever 100 is 0 ° to 15 °.

When the included angle α is 0 °, the handlebar 400 and the front foot bar 100 are substantially in a straight line, and a portion of the rear foot bar 200 (corresponding to the second hinge point 20) also substantially abuts against the front foot bar 100, so that the appearance is further compact and simple, and the stability and the overall strength of the frame 9 can be improved.

As shown in fig. 3, in the present embodiment, the hinge point between the connecting rod 300 and the forefoot lever 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.

The lines connecting the first, second and third hinge points 30 form a triangle, and the three hinge points are substantially collinear, one of the angles of the triangle is less than 15 °. In the preferred embodiment, when the angle is smaller than 10 degrees, the three hinge points are close to be on a straight line, so that the hinge structure can be further hidden, and the appearance is more concise.

Referring to fig. 3 to 5, in the present embodiment, the hinge point between the connecting rod 300 and the rear foot bar 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 on both sides of the reference line, respectively.

The connecting rod 300 is hinged on the inner side of the rear foot bar 200 to form a fourth hinge point 40, the fourth hinge point 40 is hidden on the inner side of the rear foot bar 200, and the appearance is more concise. In the unfolded state, the first, third and fourth hinge points 40 form a triangular region in space, and 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 region, which is more compact than the conventional four-bar linkage. During the folding process, the second hinge point 20 moves and leaves the triangular area, and finally the second hinge point 20 and the third hinge point 30 are positioned at two sides of the reference line, and the four hinge points are approximately collinear, so that the folded volume is reduced.

As shown in fig. 3 to 5, in the unfolded state, the second hinge point 20 and the third hinge point 30 are adjacent to each other. In contrast, the second hinge point 20 and the third hinge point 30 are remote from each other in the folded state.

In the unfolded state, the second hinge point 20 and the third hinge point 30 are adjacent to each other such that the triangular area is further reduced, and the four-bar linkage is more compact. And when the second hinge point 20 and the third hinge point 30 are close enough, it is difficult to find that four hinge points exist when viewed remotely, and the appearance is more concise. In the folding process, the front foot bar 100 is regarded as stationary, the third hinge point 30 does not move in space, the second hinge point 20 is gradually far away from the third hinge point 30, and the handle bar 400 and the rear foot bar 200 are driven to approach the front foot bar 100 from two sides of the front foot bar 100 by means of the rotation movement of the first hinge point 30 and the third hinge point 30, so that the folding is finally completed.

As shown in fig. 3 to 5, in the present embodiment, the first hinge point 10 and the fourth hinge point 40 are away from each other and approach each other during the folding process.

During the folding process, the movement track of the second hinge point 20 passes through the reference line, and when the second hinge point 20 is in the triangular area and gradually approaches the reference line, the first hinge and the fourth hinge are far 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 maximized. As the second hinge point 20 passes through the reference line and gradually moves away, the first and fourth hinge points 40 gradually move together while the handle bar 400 and the rear foot bar 200 are simultaneously moved closer to the front foot bar 100, and finally the folding is completed.

As shown in FIG. 5, in one embodiment, the top of the rear foot bar 200 has a bent section 220 to allow the rear foot bar 200 to be positioned adjacent to the front foot bar 100 in the folded condition.

The bending section 220 is bent forward from the top of the rear foot bar 200 and forms an inflection point, and in the folded state, the rear foot bar 200 with the bending section 220 and the handle bar 400 form a receiving space for receiving the front foot bar 100, so that the front foot bar 100 and the rear foot bar 200 in the same plane are closer to each other, and the space occupied by the folded rear foot bar is further reduced. In a preferred embodiment, the inflection point is in the range of 90 ° to 180 ° to avoid interference between the rear foot bar 200 and the front foot bar 100.

The bending section 220 is formed by integrating or separating the rear leg bar 200, and can be injection molded, cast, cold worked, etc. according to the material, when the integrated structure is adopted, the assembly of parts can be reduced and the structural strength can be increased.

In one embodiment, as shown in fig. 6 and 7, the handle bar 400 has a support boss 430 adjacent the second hinge point 20, the support boss 430 abutting the bending section 220 in the unfolded state.

The supporting boss 430 is located at the bottom of the handle bar 400 and has a supporting surface abutting against the upper surface of the bending section 220, for supporting the handle bar 400, thereby improving the stability in use in the unfolded state. The support surface is smaller than the upper surface of the bending section 220, so that the support boss 430 is ensured to be sufficiently supported by the bending section 220, and the handle bar 400 is more stable to use. The upper surface of the bending section 220 is adapted to the support surface, so as to minimize the fit gap and avoid pinching the child by the gap.

As shown in fig. 7, in one embodiment, the link 300 is L-shaped, and in the unfolded state, the handle bar 400, the front foot bar 100, the link 300, and the rear foot bar 200 enclose a concave pentagon.

In the unfolded state, the front foot bar 100 and the rear foot bar 200 are opposite sides, and the concave part of the concave pentagon extends into the pentagon from the second hinge point 20 of the handle bar 400, so that the top end of the rear foot bar 200 connected with the second hinge point 20 is close to the front foot bar 100, and the four-bar mechanism is more compact.

The connecting rod 300 is arranged at the inner side of the front foot bar 100, and in the folded state, the connecting rod 300 with an L-shaped structure is staggered with the top of the front foot bar 100, so that interference with the front foot bar 100 is avoided, the first hinging point 10 and the third hinging point 30 are close to each other as much as possible, and the structure is more compact.

In another embodiment, as shown in fig. 8 and 9, the portion of the handlebar 400 between the first hinge point 10 and the second hinge point 20 is an extension 420, and the top of the forefoot lever 100 has a recess 120 that receives the extension 420.

The extension 420 is used to connect the first hinge point 10 and the second hinge point 20, and may be assembled to the bottom of the handle bar 400 as a separate component, or may be integrally formed with the handle bar 400. The first avoidance groove 1201 of the avoidance extension section 420 during installation is formed in at least one side of the edge of the groove 120, and after assembly, as the installation gap or the hinge structure is formed at two ends of the extension section 420 and is positioned below the front foot rod 100, the groove 120 shields the installation gap or the hinge structure at the extension section 420, so that children are prevented from being injured due to touching the hinge point. And the extension section 420 is located below the front foot bar 100, and the extension section 420 is hidden inside the groove 120, so that the appearance is more concise.

As shown in fig. 9, in the present embodiment, the forefoot lever 100 includes a forefoot skeleton 130 and a forefoot shell 140 wrapped around the forefoot skeleton 130, the forefoot skeleton 130 extends from the top of the forefoot shell 140, and the extending portion is U-shaped in cross section and encloses a groove 120.

The groove 120 is integrally injection molded by the forefoot housing 140, and the surface of the groove 120 near one side of the forefoot shaft 100 is closed and is in smooth transition with the forefoot housing to avoid pinching the child. The U-shaped opening is oriented toward the side near the rear foot bar 200.

The forefoot skeleton 130 is a rod shape, and serves as a main support for the forefoot shaft 100. The front foot frame 130 is provided with a plurality of first mounting holes 1301, and the bottom ends of the front foot housings 140 at both sides are connected by the front foot pedal 141 to form a U shape. The front foot rest 141 allows the rider to put his feet on one hand and reduces the rocking of the frame 9 along both sides on the other hand. In a preferred embodiment, the front foot board 141 is integrally formed with the front foot housing 140 to enhance structural strength. The bottom of the forefoot housing 140 is provided with a second avoidance groove 1401 for mounting the forefoot skeleton 130, and the opening of the second avoidance groove 1401 is downward. In combination with the groove 120, the front foot shell 140 is sleeved outside the front foot framework 130 from top to bottom and simultaneously covers the extension section 420 by means of the groove 120, and then the front foot shell 140 is fixedly connected and fixed by penetrating through the mounting hole through the bolt, so that the front foot framework 130 and the extension section 420 are simultaneously covered when the second avoidance groove 1401 of the front foot shell 140 and the groove 120 at the top are mounted, and the assembly is convenient. The groove 120 covers the upper surface and both side walls of the extension 420 to limit the left and right shaking of the handle bar 400.

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

The joint is the joint between the inner wall of the groove 120 and the outer wall of the extension section 420, and is located in the groove 120. The first hinge point 10 is also located in the recess 120 and the child is prevented from being pinched by the first hinge point 10. And the first hinge point 10 is hidden, the appearance is more concise.

As shown in fig. 11 to 14, in one embodiment, a relief hole 1202 is formed at the bottom of the groove 120 to allow the extension 420 to fold to the bottom side during folding.

Dodging port 1202 is offered to being close to preceding foot rest 100 one side in tank bottom department, and its width suits with the width of extension section 420, and when handlebar 400 rotated around first pin joint 10, until handlebar 400 supported and leaned on tank bottom position, and then can't continue folding, dodges port 1202 shortened the length of tank bottom, and then made extension section 420 can continue rotatory and stretch into dodging port 1202 for handlebar 400 is further close to preceding foot rest 100, reduces the volume after folding. Because the avoiding opening 1202 is positioned in the area where the child is easy to release, the edge of the avoiding opening 1202 and the adjacent part of the extension section 420 are in smooth transition, so that the gap between the assembling gaps is reduced, and the child is prevented from being injured by clamping. On the other hand, sharp angles are eliminated, and children are prevented from being scratched.

As shown in fig. 11 to 15, in one embodiment, a first pivot 150 is disposed between two opposite sidewalls of the groove 120 and the extension section 420 at the first hinge point 10, two opposite sidewalls of the groove 120 are provided with arc-shaped sliding ways 1203 distributed around the first pivot 150, and corresponding positions of the extension section 420 are provided with guide steps 421 matching with the arc-shaped sliding ways 1203.

The first pivot 150 is a circular shaft, the projection point of the side surface where the 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 which are corresponding to each other, the first pivot 150 is fixedly connected with the groove 120 after passing through the second mounting hole 1204 and the third mounting hole 422, and the extension section 420 can rotate around the first pivot 150.

Since the handle bar 400 rotates about the first pivot 150 in a circular movement path, the arc-shaped sliding way 1203 and the guide step 421 cooperate with each other and form a partially circular guide path concentric with the movement path of the handle bar 400, so that the rotation of the handle bar 400 is more stable. The arc-shaped slideway 1203 is vertically arranged by protruding from the inner wall of the groove 120, and correspondingly, the guiding step 421 is concavely arranged at the corresponding position by the extension section 420.

In one embodiment, a locking mechanism is provided in the recess 120 to hold the frame 9 in the deployed state.

The locking mechanism is used for keeping the baby stroller in an unfolding state and avoiding folding during normal push-pull use. Because the locking mechanism has assembly gaps and moving parts, in the unfolded state, the locking mechanism is arranged and hidden in the groove 120, so that a child cannot touch the locking mechanism, the child is prevented from being injured by the locking mechanism, and the appearance is more concise.

As shown in fig. 16-18, in one embodiment, the locking mechanism includes a bayonet 1205 in the recess 120, a retractable locking bolt 440 mounted at an end of the handle bar 400, a first elastic member 441 located in the handle bar 400 for driving the locking bolt 440 into the bayonet 1205, a first pull wire 442 connected to the locking bolt 440, and a driving member 443 connected to the first pull wire 442 for driving the locking bolt 440 out of the bayonet 1205.

The holding of the unfolded state is completed by the extension of the lock tongue 440 into the bayonet 1205, the end of the handle bar 400 is provided with a chute 401 for accommodating the lock tongue 440, the lock tongue 440 slides in the chute 401, and the bayonet 1205 is opened in the groove 120 corresponding to the position of the lock tongue 440. The connection state of the lock tongue 440 and the bayonet 1205 has two states of locking and unlocking:

in the locked state, the lock tongue 440 protrudes out of the chute 401 and extends into the bayonet 1205;

in the unlocked state, the locking bolt 440 exits the bayonet 1205 and retracts into the chute 401.

In order to effectively maintain the locking state and the automatic locking in the unfolded state, a first elastic member 441 is disposed at the bottom of the chute 401, the extending and contracting direction of the first elastic member 441 is consistent with the sliding direction of the lock tongue 440, and the lock tongue 440 extends into the lock tongue 440 by abutting the first elastic member 441.

In order to avoid that the lock tongue 440 is entirely separated from the chute 401, a kidney-shaped groove 4401 is formed in the side wall of the lock tongue 440, the length direction of the kidney-shaped groove 4401 is consistent with the sliding square of the lock tongue 440, correspondingly, first through holes 402 which are adaptive to the kidney-shaped groove 4401 are formed in the two side walls of the chute 401, and the restriction of the sliding position of the lock tongue 440 is completed by penetrating the kidney-shaped groove 4401 and the first through holes 402 through the bolts 444. The interaction of the latch 444 with the first resilient member 441 enables the locking bolt 440 to extend into the bayonet 1205 without exiting the chute 401.

The bottom of the lock tongue 440 is fixedly adhered or bound with a first pull wire 442, the other end of the first pull wire 442 is bound or adhered and fixed with a driving member 443, and the driving member 443 is used for releasing the lock for the operator to toggle.

The unlocking operation is to toggle the driving member 443, and pull the lock tongue 440 through the first pull wire 442 to retract into the chute 401, and simultaneously the lock tongue 440 is withdrawn from the bayonet 1205, where the driving member 443 is generally disposed at a position that is convenient for an operator to reach, so as to facilitate unlocking the locking mechanism in the groove 120.

Referring to fig. 17, the top of the side of the lock tongue 440 near the bayonet 1205 is an abutment 4402, and when the folded state changes from the unfolded state, the abutment 4402 preferentially contacts the groove 120, and the arc treatment or bevel design of the abutment 4402 facilitates the change of the handle 400 from the folded state to the unfolded state, and the groove 120 abuts against the arc surface or the bevel surface of the abutment 4402, so that the handle is automatically retracted into the chute 401. Continuing to rotate, after the lock tongue 440 is aligned with the bayonet 1205, the lock tongue 440 is extended into the bayonet 1205 by the first elastic member 441, so as to complete locking.

As shown in fig. 19 and 20, in one embodiment, the driving member 443 is a knob slidably mounted on an outer wall of the handle bar 400, and the first pull wire 442 extends through the interior of the handle bar 400 until it passes through the handle bar 400 to be connected to the knob.

The outer wall of the handle bar 400 is provided with a third guide groove 403, the pulling button part extends into the third guide groove 403 and is slidably mounted on the handle bar 400 in a buckling mode, the bottom of the handle bar 400 is provided with a first channel 404 for a pulling wire to extend into the handle bar 400, the first channel 404 is communicated with the sliding groove 401, and the first pulling wire 442 extends into the handle bar 400 from the bottom of the lock tongue 440 through the first channel 404 and is fixedly connected with the pulling button in a continuous extending mode. By pulling the pulling button, the pulling wire is pulled, the lock tongue 440 is driven to withdraw from the bayonet 1205, and the releasing of the lock is completed. In a preferred embodiment, the third guide groove 403 is provided near the middle or upper portion of the handle bar 400, so that the toggle button is in a range that can be easily released by an operator, thereby facilitating the unlocking operation. In a further preferred embodiment, the third guide groove 403 is arranged below the handle bar 400, so that the toggle button is covered by the handle bar 400, and the appearance is more concise.

In one embodiment, the second hinge point 20 is within the recess 120 in the unfolded state.

The outer wall portion of the recess 120 extends to cover the second hinge point 20 adjacent to the extension 420, avoiding child pinching and providing a more compact appearance.

In one embodiment, the rear leg bar 200 has a bending section 220 at the top, and the handle bar 400 has a supporting boss 430 adjacent to the second hinge point 20, and in the unfolded state, the supporting boss 430 abuts against the bending section 220, and the abutting portion is located in the groove 120.

Since the abutment has an assembly gap in an area that is easily reached by a child, the recess 120 covers the abutment and shields the assembly gap so that the child is not pinched by the gap.

In another embodiment, as shown in fig. 19-21, the handle bar 400 is a telescopic bar, and includes a lower handle bar 460 and an upper handle bar 450 that are slidably inserted, wherein the lower handle bar 460 is hinged to the front foot bar 100 and the rear foot bar 200, respectively.

The upper handle bars 450 are used for holding the operator with hands, the upper handle bars 450 on the two sides are connected at the top through the holding rod 410, the holding area of the two hands is increased, and the holding is convenient. The upper handle bar 450 is inserted into the inner wall or the outer wall of the lower handle bar 460 to realize relative sliding expansion and contraction. The first hinge point 10 and the second hinge point 20 are located on the lower handle bar 460 such that the hinge points are close to the lower side, and the distances between the first hinge point 10 and the bottom of the front foot bar 100 and the distance between the first hinge point 10 and the top of the handle bar 400 are kept close, so that when the handle bar 400 is folded around the first hinge point 10, the folding volume is small due to the close distances.

With reference to fig. 38, a cup holder 458 for holding a kettle is inserted into the upper handle 450, so that an operator can take the kettle at any time.

As shown in fig. 22, in one embodiment, the upper handle bar 450 is mounted with a retractable positioning pin 451, the lower handle bar 460 is provided with a positioning pin hole 461 cooperating with the positioning pin 451, and the positioning pin 451 is inserted into the positioning pin hole 461 to limit the relative sliding of the lower handle bar 460 and the upper handle bar 450.

The positioning pin 451 is swept to form a sliding path when the upper handle bar 450 slides along the lower handle bar 460, and the positioning pin hole 461 is provided on the sliding path so that the positioning pin 451 can extend into the positioning pin hole 461 and restrict the upper handle bar 450 from sliding when the upper handle bar 450 slides. And 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 smooth and has no salient points all the time.

The cooperation between the upper handle lever 450 and the lower handle lever 460 by means of the positioning pin 451 and the positioning pin hole 461 has:

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, limiting the upper handle bar 450 to continue sliding;

In the extended state, when the positioning pin 451 is retracted from the positioning pin hole 461, the upper handle bar 450 can be extended and retracted slidably along the lower handle bar 460.

As shown in fig. 22 to 25, in one embodiment, a second elastic member 452 is disposed in the upper handle 450 to drive the positioning pin 451 into the positioning pin hole 461. The upper handle 450 is provided with a lock release switch and a sliding part 453 linked with the lock release switch, and the lock release switch is connected with the sliding part 453 through a second pull wire 457 for driving the positioning pin 451 to be separated from the positioning pin hole 461.

The second elastic member 452 is disposed at the bottom of the positioning pin 451, and keeps the positioning pin 451 extending into the positioning pin hole 461, and the second elastic member 452 is typically a spring. The slider 453 is in a bar shape and is slidable in the upper handle bar 450.

In a preferred embodiment, the sliding direction of the sliding member 453 coincides with the sliding direction of the upper handle lever 450. The positioning pin 451 interacts with the slider 453 to urge the positioning pin 451 out of the positioning pin hole 461 when the slider 453 slides toward the grip 410 side. The second pull wire 457 is connected to the upper handle bar 450 in such a manner that the release switch is disposed at any position on the grip lever 410, which is easily reached by the operator for convenience of releasing the lock by the operator.

The whole linkage process comprises the following steps:

in the unlocking state, the unlocking switch is toggled/pressed, the second stay wire 457 pulls the sliding member 453 to slide, the positioning pin 451 is driven to withdraw from the positioning pin hole 461, and meanwhile the second elastic member 452 is compressed, so that unlocking is completed.

In the locked state, the lock release switch is released, and the positioning pin 451 is driven to extend into the positioning pin hole 461 by the resilience of the second elastic member 452 to complete locking.

In one embodiment, the number of the positioning pin holes 461 is plural, and the positioning pin holes are arranged on the sliding path of the positioning pin 451 at intervals, so as to provide multi-gear adjustment, and facilitate the operator to adjust the handle bar 400 according to the height of the operator.

In one embodiment, the top of the positioning pin 451 is provided with a third avoiding slot 4513 for installing the second elastic element 452, so as to limit the radial shake of the second elastic element 452, so that the sliding expansion and contraction of the positioning pin 451 is more stable.

As shown in fig. 38 and 39, in another embodiment, a locking mechanism for holding the frame 9 in the unfolded state is further included, and the slider 453 is released in conjunction with the locking mechanism.

The locking mechanism may be a related part in the above embodiment, for example, the locking mechanism includes a bayonet 1205 opened on the front foot bar, a telescopic lock tongue 440 installed on the end of the handle bar 400, a first elastic member 441 located in the handle bar 400 and driving the lock tongue 440 into the bayonet 1205, and a first pull wire 442 connected between the sliding member 453 and the lock tongue 440.

The linkage lock release can simplify the lock release operation, the driving piece 443 of the embodiment can be omitted, and the telescopic lock release of the handle bar and the lock release of the frame can be realized simultaneously by using the lock release switch.

In another embodiment, two lock release driving modes may be simultaneously configured, for example, the locking mechanism includes a bayonet 1205 opened on the front leg, a retractable lock tongue 440 installed on the end of the handle 400, a first elastic member 441 located in the handle 400 for driving the lock tongue 440 into the bayonet 1205, a first pull wire 442 connected to the lock tongue 440, and a driving member 443 connected to the first pull wire 442 for driving the lock tongue 440 out of the bayonet 1205;

The driving member 443 is fixed to the sliding member 453 and slidably mounted on the handle bar.

In the method, the driving piece 443 is reserved, the driving piece 443 and the unlocking switch are positioned at different parts of the frame, and a user can select a more convenient unlocking mode according to the relative position or the operation habit of the user and the frame.

The driving member 443 is slidably mounted on the inner side wall of the lower handle bar 460 and slides in the sliding direction of the upper handle bar 450, and then the entire unlocking operation of the frame 9 has:

the unlocking operation a is that the driving piece 443 is shifted to drive the sliding piece 453 to slide, the first pull wire 442 is pulled to enable the lock tongue 440 to withdraw from the bayonet 1205, the frame 9 is folded, meanwhile, the positioning pin 451 is withdrawn from the positioning pin hole 461, the handle 400 is telescopically folded, and the frame 9 is folded.

And the unlocking operation b is that the unlocking switch is toggled/pressed, the second pull wire 457 is pulled, the sliding part 453 is driven to slide, the first pull wire 442 is pulled, the positioning pin 451 is withdrawn from the positioning pin hole 461, the handle bar 400 is folded in a telescopic manner, meanwhile, the lock tongue 440 is withdrawn from the bayonet 1205, the frame 9 is folded, and finally, the whole vehicle is folded.

The first stay 442 is connected with the sliding part 453, and the sliding part can slide under the control of the second stay 457 or the driving part 443, so that the telescopic folding of the handle bar 400 and the folding of the frame 9 can be completed through one unlocking operation, the original two unlocking operations are omitted, and the use is convenient.

A limit structure for limiting the stroke of the slider 453 is provided in the upper handle lever 450.

The limiting structure is used for limiting the sliding of the sliding member 453, and the sliding member 453 has two limit positions:

The first limit position limits the sliding part 453 to continue sliding in the pulling direction of the second pulling wire 457 to extend into the hollow upper handle bar 450;

in the second extreme position, the limiting slide 453 is disengaged from the upper handle bar 450.

As shown in fig. 24, in one embodiment, the slider 453 is provided with a bar-shaped hole 4531 in the direction of its own movement. The limiting structure is a positioning piece 454 fixed inside the upper handle bar 450, and at least a part of the positioning piece 454 extends into the bar-shaped hole 4531.

The bar-shaped hole 4531 is rectangular, the side of the bar-shaped hole 4531, which is close to the handle 450, is provided with a avoiding hole 4534 through which the positioning element 454 passes, and a fourth elastic element 4533 (such as a spring) is arranged in the bar-shaped hole 4531, when the second stay 457 pulls the sliding element 453, the sliding element 453 slides towards the handle 450, and meanwhile, the fourth elastic element 4533 is compressed by virtue of the positioning element 454 until the first limit position is reached after the compression is impossible. When the second pull wire 457 loses traction, the sliding member 453 is pushed to reset by the elastic force of the fourth elastic member 4533 to abut against the positioning member 454 until the avoiding hole 4534 abuts against the positioning member 454 to reach the second limit position.

As shown in fig. 24-27, in one embodiment, the sliding member 453 is provided with a matching slot 4532, the positioning pin 451 is sleeved on the sliding member 453, and a part of the positioning pin 451 is placed into the matching slot 4532.

The matching groove 4532 is formed at one side perpendicular to the movement direction of the sliding member 453, in the locked state of the positioning pin 451, the opening position of the matching groove 4532 corresponds to the position of the second elastic member 452, and the positioning pin 451 can lean against the groove bottom by means of 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 part 453 along the axial direction of the positioning pin, and the upper wall of the rectangular through hole 4511 is always abutted against the bottom or the groove wall of the matching groove 4532 by virtue of the second elastic part 452.

The upper wall of the rectangular through hole 4511 is specifically matched with the groove bottom or the groove wall:

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;

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, so that the positioning member 454 is lifted along the sliding direction until the positioning pin hole 461 is withdrawn, and the unlocking is completed. In a preferred embodiment, referring to fig. 24 to 27, a groove wall of one side of the mating groove 4532 is a slope for guiding the positioning pin 451 to be separated from the positioning pin hole 461. The fitting groove 4532 has both side groove walls, one side away from the upper handle bar 450 is inclined, and an angle of the side wall with the groove bottom is an obtuse angle, so that the positioning pin 451 can smoothly slide and withdraw from the positioning pin hole 461.

As shown in fig. 28, in one embodiment, the release switch includes a release member 4551 slidably mounted on the upper handle 450 and coupled to the second wire 457, a lock member 4552 for restricting the relative sliding movement of the release member 4551, and a button 4553 coupled to the lock member 4552, wherein the button 4553 abuts against the lock member 4552 to release the lock of the release switch by the lock member 4552.

The release locking part 4551 is in a block shape and is slidably mounted in the middle of the holding rod 410, the sliding direction of the release locking part 4551 is the radial direction of the holding rod 410, two sliding blocks (not shown) symmetrically arranged along the central line of the frame 9 are arranged in the holding rod 410, the two sliding blocks can slide along the axial direction of the holding rod 410 and are respectively connected with the second pull wires 457 at two sides, and the sliding blocks and the release locking part 4551 are mutually abutted and the abutting surface is an inclined surface. The bottom of release 4551 is provided with a fourth mounting hole 602. The locking member 4552 has a cylindrical shape with a step at the bottom, and is slidably fitted into the fourth mounting hole 602. The grip 410 is provided with a pin hole 4554 corresponding to the step of the locking member 4552, and after the assembly is completed, the locking member 4552 extends into the pin hole 4554 in the grip 410 from top to bottom, so as to limit the sliding of the release member 4551 and prevent the release member 4551 from being erroneously touched to cause the telescopic folding of the handle 400. To maintain the constraint on the release lock 4551, a third resilient member 4555 (e.g., a spring) is disposed within the fourth mounting aperture 602, the third resilient member 4555 being configured to abut the lock 4552 and urge the lock 4552 into the pin aperture 4554. The button 4553 is slidably mounted to the lower portion of the grip 410 by a snap-fit connection and abuts against a step of the locking member 4552.

When the button 4553 is pressed, the locking member 4552 is pushed out of the pin hole 4554 and compresses the third elastic member 4555, and at this time, the release member 4551 is able to slide with respect to the grip 410. Pressing the release lock 4551 slides toward the inside of the grip 410, pushing the slider to slide toward the center line of the frame 9 by virtue of the incline with the slider, the slider pulls the second pull wire 457, driving the positioning pin 451 out of the positioning pin hole 461, completing the telescopic folding of the handlebar 400 at the grip 410.

As shown in fig. 29, in one embodiment, a sealing head 456 is fixed at the bottom end of the upper handle 450 and is located in the lower handle 460, a first guiding groove 4563 and a second guiding groove 4564 which are mutually communicated are formed in the sealing head 456, wherein the positioning pin 451 is slidably mounted in the first guiding groove 4563, and the sliding member 453 is slidably mounted in the second guiding groove 4564.

The seal 456 is divided into a lower seal 4562 and an upper seal 4561, and the outer periphery of the lower seal 4562 is adapted to the inner wall of the lower handle bar 460 and forms a clearance fit. The upper end cap 4561 is adapted to the inner wall of the upper handle 450, and the end cap 456 is inserted into the upper handle 450 through the upper end cap 4561 and is fixedly inserted through the positioning member 454. The upper handle bar 450 is slidably guided by the clearance fit of the lower head 4562 and the lower handle bar 460. The head 456 also plays a guiding role to the locating pin 451 and the slider 453, and the inner wall of the first guide slot 4563 is adapted to the locating pin 451, and the locating pin 451 can slide along the inner wall of the first guide slot 4563, so that the sliding stability of the locating pin 451 is improved, the occurrence of faults is reduced, and meanwhile, the second elastic element 452 is installed in the first guide slot 4563. The second guide groove 4564 is formed in 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 fourth avoidance groove 4566 extending to the positioning member 454 and used for installing the second elastic member 452 is formed in the second guide groove 4564, so that the second elastic member 452 can be assembled conveniently.

The sealing head 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 bar by simple injection molding or other processes, thereby facilitating the processing and saving raw materials.

As shown in fig. 25 and 29, in one embodiment, the stroller is provided with a locking mechanism for maintaining the stroller frame 9 in the unfolded state, and a driving member 443 is mounted on top of the lower handle bar 460 and beyond the closure head 456, and the driving member 443 controls unlocking of the locking mechanism by the first pull wire 442. The positioning pin 451 is provided with a first wire slot 4512 for avoiding the first pull wire 442.

Because the driving member 443 is positioned closer to the grip 410 than the closure head 456, the positioning pin 451 has a first wire slot 4512 on the side of the positioning pin hole 461, and similarly, the closure head 456 has a second wire slot 4565 on the side of the positioning pin hole 461, which has the same cross-sectional shape as the wire slot. The first pull wire 442 passes through the first and second wire slots 4565, which facilitates assembly.

In another embodiment, as shown in fig. 30, the stroller is further provided with an adapter 600 for the movable plug seat 8, the rear side of the adapter 600 is hinged with the rear leg bar 200, and the front side of the adapter 600 is hinged with the link 300 through the support bar 500.

The adapter 600 is used to connect the seat 8, to realize detachable connection of the seat 8, and to facilitate storage and folding of the frame 9.

The adapter 600 is movably connected with the frame 9 through the hinge structure of the support rod 500 and the self, and can be hidden in the frame 9 after being folded as the baby stroller is unfolded/folded, so that the folded volume is reduced.

The bottom of the seat 8 is provided with a socket that mates with the adapter 600, allowing for quick installation of the seat 8 through the adapter 600 and socket.

The support bar 500 has a plate shape, and reduces its thickness to avoid folding interference with other parts.

As shown in fig. 30 and 31, in the present embodiment, the adapter 600, the link 300, the support bar 500, and the rear foot bar 200 constitute a deformable four-bar mechanism.

In the process of changing the four-bar linkage from the unfolding state to the folding state, three hinge points hinged with the adapter 600 and the supporting rod 500 are gradually in a straight line, namely, the connecting line of the three hinge points is triangular, in the folding state, one included angle alpha of the triangle is smaller than 10 degrees, the three hinge points are approximately collinear, and when the adapter 600 is observed from the side, the adapter 600 is positioned in the range of the front foot rod 100 and the rear foot rod 200, and the folding volume is reduced.

As shown in FIG. 32, in one embodiment, the connecting rod 300 is L-shaped and includes a transverse section 310 and an upturned section 320 connected to each other. The end of the transverse section 310 and the front foot bar 100 are connected to the third hinge point 30, and the end of the upturned section 320 and the rear foot bar 200 are connected to the fourth hinge point 40. The support bar 500 is hinged to the middle of the lateral section 310.

Because the connecting rod 300 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 instead of straight rod-shaped, and the deformation resistance is improved. The transverse section 310 and the upturned section 320 are integrally structured, so that the structural strength is high, and the material saving is facilitated. In the preferred embodiment, the connecting rod 300 is assembled by a connecting rod housing 330 and a connecting rod skeleton 340, the connecting rod housing 330 is concavely provided with an L-shaped groove 331, and the connecting rod skeleton 340 is sleeved in the L-shaped groove 331 and is connected through three hinge points. The link housing 330 and the link frame 340 may be made of different materials, and the link frame 340 serves to enhance the structural strength of the link 300.

As shown in FIG. 30, in one embodiment, a linkage 300 is coupled to the rear foot bar 200 at a fourth hinge point 40. The adapter 600 is connected to the rear foot bar 200 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.

Because the fourth hinge point 50 and the fifth hinge point 50 are stress points and are both fixed on the rear foot bar 200, the fourth hinge point 40 and the fifth hinge point 50 are adjacent to each other, so that the hinge structure is compact, the stress points are concentrated, and the stability of the frame 9 is improved by strengthening the structural strength of the rear foot bar 200 at the stress points, thereby facilitating the structural design of the rear foot bar 200. If the fifth hinge point 50 intersects the fourth hinge point 40 closer to the rear side of the frame 9, the upturned section 320 of the link 300 is located at the middle or front portion of the adapter 600, and the adapter 600 covers the fourth hinge point 40 when assembled, thereby affecting the assembly. Therefore, the fifth hinge point 50 is closer to the front side of the frame 9 such that the fourth hinge point 40 is exposed and the adapter 600 and the link 300 do not overlap each other, facilitating assembly.

As shown in fig. 30 to 33, in one embodiment, the rear leg 200 has a bending section 220 at the top thereof, so that the rear leg 200 in the folded state is close to the front leg 100. The fourth hinge point 40 and the fifth hinge point 50 are both near the inflection point of the bent segment 220.

The fourth hinge point 40 is located at a side of the inflection point near the bending section 220, and the fifth hinge point 50 is located at a side of the inflection point far from the bending section 220, so that the connecting rod 300 cannot interfere with the adapter 600 all the time when folding. And the fourth hinge point 40 and the fifth hinge point 50 are located at the inner side of the bending section 220, so that the appearance is more concise.

In the folded state, the rear foot bar 200 and the handlebar 400 are formed by the bending section 220 in a receiving space for receiving the front foot bar 100 when viewed from the side, so that the folded volume is further reduced, and the adapter 600 is also positioned in the receiving space to avoid protruding the frame 9.

As shown in fig. 30 to 33, 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.

The two adapters 600 are symmetrically disposed inside the side brackets, respectively, to provide two-sided support to the seat 8 for more stability in the child sitting. The cross bar 700 is a hollow circular tube horizontally inserted and fixed to the two side adapters 600 for supporting the middle portion of the seat 8 and improving riding comfort of children. The cross bar 700 is disposed in a concentrated arrangement area of the hinge points and is located at a middle position of the frame 9, further limiting the sway of the frame 9 along both sides.

The inner wall of the adapter 600 is provided with a mounting seat 601, a fourth mounting hole 602 which is matched with the outer wall of the cross rod 700 is formed in the mounting seat 601, two ends of the cross rod 700 are inserted into the fourth mounting holes 602 on two sides, the cross rod 700 and the adapter 600 are fixed through fasteners, and the assembly of the cross rod 700 and the adapter 600 is completed.

As shown in fig. 30, in one embodiment, the adapter 600 and the support rod 500 are connected to a sixth hinge point 60. The crossbar 700 is positioned between the fifth hinge point 50 and the sixth hinge point 60.

Since most of the force of the seat 8 acts on the cross bar 700, the cross bar 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 approximately evenly distributed on the fifth hinge point 60 and the sixth hinge point 60, and damage to the hinge point on one side in the use process due to overlarge force is avoided, and the service life and the child safety of the product are affected. In a preferred embodiment, the crossbar 700 is positioned at the midpoint of the line connecting the fifth and sixth hinge points 60 such that the stresses on the fifth and sixth hinge points 60 are approximately the same.

As shown in fig. 30, in one embodiment, both the fifth and sixth hinge points 50, 60 are between the second and fourth hinge points 20, 40.

In the unfolded state, since the second hinge point 40 and the fourth hinge point 40 are both located on the rear foot bar 200, the fifth hinge point 60 and the sixth hinge point 60 are located between the second hinge point 40 and the fourth hinge point 40, so that the acting force from the seat 8 is centrally transmitted to the rear foot bar 200 through the adapter 600, and the structure of the rear foot bar 200 is reinforced, thereby improving the stability of the frame 9.

In one embodiment, the handlebar 400 and the forefoot lever 100 are in the same line, and the portion of the handlebar 400 located between the first hinge point 10 and the second hinge point 20 is an extension 420, where the extension 420 is hidden inside the forefoot lever 100 or inside the forefoot lever 100.

The extension 420 is used to connect the first hinge point 10 and the second hinge point 20, and may be assembled to the bottom of the handle bar 400 as a separate component, or may be integrally formed with the handle bar 400. The extension section 420 overlaps the front foot bar 100, so that the stress points of the first hinge point 10 and the second hinge point 20 are located at the overlapping portion of the extension section 420 and the front foot bar 100, and compared with the existing single stress rod piece, the structural strength of the side frame 1 is improved. And when hidden inside or on the inside of the forefoot lever 100, the appearance is more compact.

As shown in fig. 34, in one embodiment, the rear foot bar 200 has a bending section 220 at the top thereof, such that the rear foot bar 200 is close to the front foot bar 100 in a folded state, and the rear foot bar 200 includes a rear foot skeleton 240 and a rear foot housing 230 covering the rear foot skeleton 240, wherein at least a portion of the rear foot skeleton 240 is located at the bending section 220.

The rear foot housing 230 is provided with the third avoidance groove 4513, and the shape of the inner wall of the third avoidance groove 4513 is adapted to the rear foot skeleton 240, so that the rear foot skeleton 240 is not protruded out of the rear foot housing 230 after being sleeved and installed, the interference of the rotation of the inner side connecting rod 300 or the adapter 600 is avoided, and the appearance is more concise. The hindfoot armature 240 is configured to bear a portion of the force applied to the hindfoot bar 200 such that a portion of the hindfoot armature 240 is located at the bending section 220 to enhance the load bearing capacity of the bending section 220.

A rear foot cross rod 250 fixed by plugging is further arranged between the rear foot rods 200 at the two sides, so that the shaking of the rear foot rods 200 at the two sides is limited, and the stability of the frame 9 is improved. The middle part of the rear foot bar 200 is provided with a brake pedal, and correspondingly, the inner side of the rear wheel is provided with a brake system (not shown) linked with the brake pedal, so that the pedal is convenient for an operator to tread.

As shown in FIG. 34, in one embodiment, the hindfoot housing 230 wraps at least the outside of the hindfoot skeleton 240.

The third avoidance groove 4513 is disposed on an inner wall of the rear foot housing 230, so that the rear foot housing 230 can wrap an outer side of the rear foot skeleton 240, and an outer side of the rear foot bar 200 has no assembly gap, and has a smooth surface and a more concise appearance.

As shown in FIG. 34, in one embodiment, a portion of the hindfoot skeleton 240 is located at the bend section 220 and another portion extends from the inflection point of the bend section 220 to a side remote from the forefoot shaft 100.

The shape of the side projection of the rear foot skeleton 240 is similar to that of the rear foot case 230, and extends to the bending section 220 and the rear wheel direction from the inflection point for a certain distance, so that the other surfaces of the rear foot skeleton 240 except the inner wall are wrapped by the rear foot case 230, on one hand, the appearance is more concise, on the other hand, a part of acting force is dispersed, and the deformation resistance of the rear foot lever 200 is enhanced. Since the rear foot bar 200 is a main bearing member, the rear foot skeleton 240 and the rear foot housing 230 may be made of different materials, thereby improving the structural strength of the rear foot bar 200.

In one embodiment, the linkage 300 and the rear foot bar 200 are connected to the fourth hinge point 40, the adapter 600 and the rear foot bar 200 are connected to the fifth hinge point 50, and the second hinge point 20, the fourth hinge point 40, and the fifth hinge point 50 are all on the rear foot enclosure 230.

The rear foot armature 240 is nested within the rear foot housing 230 such that the front foot bar 100, the connecting rod 300, and the adapter 600 associated with the second, fourth, and fifth hinge points 50 are all connected to the rear foot housing 230 for ease of assembly.

As shown in fig. 35, in one embodiment, the rear foot housing 230 is provided with a plurality of mounting platforms 231 extending toward the inner side of the side frame 1, and the fourth hinge point 40 and the fifth hinge point 50 are provided with respective mounting platforms 231 for threading corresponding pivots.

The second avoiding groove 1401 of the rear foot case 230 has a groove bottom provided with a mounting base 231 protruding in the projection direction of the side frame 1. The two mounting tables 231 are provided with round holes 232 for penetrating the pivot shafts, and the adapter 600 and the connecting rod 300 are hinged on the rear foot housing 230. The two mounting tables 231 are connected in the second avoiding groove 1401, and structural strength is increased. And the height of the mounting table 231 exceeds the outer wall of the rear foot skeleton 240, so that interference friction between the adapter 600 and the connecting rod 300 and the rear foot bar 200 after assembly is avoided, and the folding smoothness is influenced.

In one embodiment, the rear foot skeleton 240 is provided with a avoiding area 241 corresponding to the position of each mounting table 231 at the inflection point of the bending section 220.

Because the height of the mounting table 231 is higher than the outer wall of the rear foot skeleton 240, the design of the avoidance region 241 facilitates the installation of the rear foot skeleton 240.

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 table 231 abuts the inner edge of the avoidance area 241.

The inner edge of the avoidance area 241 is waist-shaped and is mutually abutted with the outer shape parts of the two mounting tables 231, so that the mounting clearance is reduced, the acting force acting on the mounting tables 231 is effectively transferred to the rear foot skeleton 240, and the bearing capacity of the rear foot bar 200 is increased.

In one embodiment, the handle 400 has a supporting boss 430 adjacent to the second hinge point 20, and in the unfolded state, the supporting boss 430 abuts against the bending section 220, and the rear foot skeleton 240 extends at least to the abutting portion.

The bending section 220 is connected to a plurality of hinge points and abuts against the supporting boss 430, so that the acting force of the front foot bar 100 and the handle bar 400 is transferred to the bending section 220 through the supporting boss 430, and the acting force of the seat 8 is transferred to the bending section 220 through the adapter 600, so that the rear foot skeleton 240 extends at least to the abutting position, bears the acting force together with the rear foot housing 230, and improves the bearing capacity of the rear foot bar 200.

As shown in fig. 36 and 37, in one embodiment, the rear foot housing 230 is clamped to both sides of the bottom end of the handle bar 400 at the second hinge point 20, and a second pivot 234 is provided at the clamping portion.

Since the second hinge point 20 is a hinge point of the handle bar 400 and the rear foot bar 200, the handle bar 400 and the rear foot bar 200 are easy to shake during the long folding process, the rear foot housing 230 is provided with two symmetrical support arms 233 provided 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 holes 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. Both ends of the second pivot shaft 234 are supported via the two-sided support arms 233, so that the handle bar 400 and the rear foot bar 200 are more stable when being rotatably folded.

The invention has the following working principle that firstly, the seat 8 is detached from the adapter 600 and separated from the frame, the release lock 4551 of the handle bar 400 is pressed, the second stay wire 457 pulls the sliding part 453 and drives the positioning pin 451 to withdraw from the positioning pin hole 461, meanwhile, the sliding part 453 drives the first stay wire 442 to pull the lock tongue 440 to withdraw from the bayonet 1205, the frame 9 is folded, the handle bar 400 rotates anticlockwise with the first hinging point 10 as the rotation center to be close to the front foot bar 100, the rear foot bar 200 is pulled and rotated by the connecting rod 300 to be continuously close to the front foot bar 100 until the handle bar 400, the front foot bar 100, the rear foot bar 200 and the connecting rod 300 are folded to be approximately flat, and the folding is completed. Of course, the driving member 443 can be moved to perform the unlocking operation.

When in use, the handle bar 400 is rotated clockwise around the first hinging point 10 to be far away from the front foot bar 100, the rear foot bar 200 is driven to be far away from the front foot bar 100, the connecting rod 300 is gradually unfolded until the lock tongue 440 stretches into the bayonet 1205 to automatically complete locking, the handle bar 400 is pulled out, the positioning pin 451 is relied on to automatically stretch into the positioning pin hole 461 to complete unfolding, and finally the seat 8 and an adaptive seat on a frame are aligned and assembled, so that the bicycle can be used.

In use, the height of the upper handle 450 is adjusted by adjusting the positioning pin 451 to extend into the positioning pin hole 461 at different positions through the release lock 4551.

Compared with the traditional structure, the baby stroller has the advantages that the distance between the rear foot rod and the connecting rod is smaller, so that the four-bar mechanism in the middle is more compact, and the modeling is simpler.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. When technical features of different embodiments are embodied in the same drawing, the drawing can be regarded as a combination of the embodiments concerned also being disclosed at the same time.

The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.

Claims

1. The baby stroller is characterized by comprising a frame and a seat arranged on the frame, wherein the frame comprises two symmetrically arranged side frames, each side frame comprises a handle bar, a front foot bar, a connecting rod and a rear foot bar which are sequentially hinged to form a foldable four-bar mechanism, the hinge points between the handle bar and the front foot bar are first hinge points, the hinge points between the handle bar and the rear foot bar are second hinge points, the hinge points between the connecting rod and the front foot bar are third hinge points, the hinge points between the connecting rod and the rear foot bar are fourth hinge points, the position of the first hinge point is higher than that of the second hinge point in a baby stroller unfolding state, the first hinge points, the second hinge points and the third hinge points are approximately collinear, the connecting rod is L-shaped, and the handle bar, the front foot bar, the connecting rod and the rear foot bar encircle to form a concave pentagon;

in the unfolded state, the second hinge point and the third hinge point are adjacent to each other, the handle bar and the rear foot bar are respectively rotated from two sides of the front foot bar to be close together when in folding, the first hinge point and the fourth hinge point are firstly far away from each other and then approach each other, and in the folded state, the second hinge point and the third hinge point are far away from each other;

And taking a connecting line between the first hinge point and the fourth hinge point as a reference line, wherein in an unfolding state, the second hinge point and the third hinge point are positioned on the same side of the reference line, and in a folding state, the second hinge point and the third hinge point are respectively positioned on two sides of the reference line.

2. The stroller of claim 1, wherein the handlebar and the forefoot bar are held against each other at a location between the first and second hinge points in at least one of the following ways:

3. The stroller of claim 2, wherein the angle between the line between the first hinge point and the second hinge point and the front leg is 0 ° to 15 °.

4. The stroller of claim 1, wherein the top of the rear leg has a bent section such that the rear leg is adjacent the front leg in the collapsed condition.

5. The stroller of claim 4, wherein the handle bar has a support boss adjacent the second hinge point, the support boss abutting the fold section in the unfolded state.