CN213799844U

CN213799844U - Baby stroller convenient to fold

Info

Publication number: CN213799844U
Application number: CN202021868323.XU
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: 2021-07-27
Anticipated expiration: 2030-08-31
Also published as: CN212500618U; CN213768690U; CN114056412A; CN213768689U; CN213799843U

Abstract

The utility model discloses a shallow convenient to it is folding baby, include the frame and install the seat on the frame, the frame includes the side frame that two symmetries set up, every side frame is including articulating the handle bar that constitutes a folding four-bar linkage in proper order, preceding foot bar, connecting rod and back foot bar, the pin joint between handle bar and the preceding foot bar is first pin joint, the pin joint between handle bar and the back foot bar is the second pin joint, under the shallow expansion state, the position of first pin joint is higher than the position of second pin joint, handle bar and back foot bar are drawn close to the rotation of front foot bar respectively from the both sides of preceding foot bar when folding. The handle rod is a telescopic rod and comprises a lower handle rod and an upper handle rod which are in sliding insertion connection, wherein the lower handle rod is hinged with the front foot rod and the rear foot rod respectively. At least four hinge points for folding are arranged, so that the hinge mechanism of each hinge point is simplified, and the folding times and the service life of the baby stroller are improved.

Description

Baby stroller convenient to fold

Technical Field

The utility model relates to a perambulator field specifically is a baby's shallow convenient to it is folding.

Background

The utility model provides a baby carriage is used for baby's outdoor activities to facilitate and the tool bogie of design, generally has preceding foot pole, back foot pole and handle pole, and in order to carry, except that above three member can fold each other, the handle pole can fold flexible equally.

The front foot rod, the rear foot rod and the handle rod in the existing baby carriage are only folded by a single hinged structure, and the hinged structure is also provided with a locking mechanism for keeping the baby carriage in an unfolded state, so that one hinged structure bears the folding of at least three rod pieces and the locking for keeping the baby carriage unfolded, the structure is complex, and the baby carriage is easy to break down after being used for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model provides a baby's shallow convenient to it is folding.

A baby stroller convenient to fold comprises a stroller frame and a seat installed on the stroller frame, wherein the stroller frame comprises two side stroller frames which are symmetrically arranged, each side stroller frame comprises a handle rod, a front foot rod, a connecting rod and a rear foot rod which are sequentially hinged to form a foldable four-bar mechanism, a hinge joint between the handle rod and the front foot rod is a first hinge joint, a hinge joint between the handle rod and the rear foot rod is a second hinge joint, the first hinge joint is higher than the second hinge joint in the unfolded state of the baby stroller, and the handle rod and the rear foot rod are respectively close to the front foot rod in a rotating manner from two sides of the front foot rod in the folded state;

the handle rod is a telescopic rod and comprises a lower handle rod and an upper handle rod which are inserted in a sliding mode, wherein the lower handle rod is hinged with the front foot rod and the rear foot rod respectively.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the upper handle bar is provided with a telescopic positioning pin, the lower handle bar is provided with a positioning pin hole matched with the positioning pin, and the positioning pin is inserted into the positioning pin hole to limit the relative sliding between the lower handle bar and the upper handle bar.

Optionally, a second elastic piece for driving the positioning pin to enter the positioning pin hole is arranged in the upper handle rod;

the upper handle rod is provided with a lock release switch and a sliding piece linked with the lock release switch, and the lock release switch is connected with the sliding piece through a second pull wire and used for driving the positioning pin to be separated from the positioning pin hole.

Optionally, the stroller further comprises a locking mechanism for maintaining the frame in the deployed position;

the locking mechanism comprises a bayonet arranged on the front foot rod, a spring bolt which is arranged at the end part of the handle rod and can stretch, a first elastic part which is positioned in the handle rod and drives the spring bolt to enter the bayonet, a first pull wire connected between the sliding part and the spring bolt, and a driving part which is connected with the first pull wire and drives the spring bolt to be separated from the bayonet;

the unlocking mode of the locking mechanism is at least one of the following modes:

the mode a, the sliding piece is linked with the locking mechanism to release the lock;

mode b, the driving piece and the sliding piece are relatively fixed and are slidably mounted on the handle rod.

Optionally, a limit structure for limiting the stroke of the sliding part is arranged in the upper handle rod.

Optionally, the sliding part is provided with a strip-shaped hole along the self-movement direction;

the limiting structure is a positioning piece fixed inside the upper handle rod, and at least one part of the positioning piece extends into the strip-shaped hole.

Optionally, a matching groove is formed in the sliding part, the positioning pin is sleeved on the sliding part, and a part of the positioning pin is placed in the matching groove.

Optionally, the release switch includes:

the unlocking piece is slidably arranged on the upper handle rod and is linked with the second pull wire;

a lock member that restricts sliding of the lock release member;

and the button is abutted against the locking piece and used for releasing the locking of the locking piece on the unlocking piece.

Optionally, a seal head is fixed to the bottom end of the upper handle rod and located in the lower handle rod, a first guide groove and a second guide groove which are communicated with each other are formed in the seal head, the positioning pin is slidably mounted in the first guide groove, and the sliding piece is slidably mounted in the second guide groove.

Optionally, the stroller is provided with a locking mechanism to maintain the frame in the deployed state;

a driving piece is mounted at the top of the lower handle rod and at a position crossing the seal head, and the driving piece controls the locking mechanism to be unlocked through a first pull wire;

and a wire groove for avoiding the first pull wire is formed in the positioning pin.

The utility model discloses a baby's shallow is provided with a plurality of pin joints that are used for the frame folding to and can stretch out and draw back folding handle pole, make folding convenience and volume littleer.

Drawings

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

FIG. 2 is a perspective view of the 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 illustration of the forefoot shell of FIG. 3 removed;

FIG. 7 is an enlarged view of portion B of 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 handle bar of the stroller;

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

FIG. 11 is an enlarged view of portion C of FIG. 8;

FIG. 12 is an enlarged view of portion D of FIG. 8;

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

FIG. 14 is an enlarged view of section E of FIG. 13;

FIG. 15 is a cross-sectional view of the groove and extension of 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 of the stroller showing the locked position of the handle bar and the groove;

FIG. 19 is a schematic view of the stroller showing the handle bars in an extended position;

FIG. 20 is a schematic view of the stroller showing the handle bars in a collapsed position;

FIG. 21 is a cross-sectional view of the stroller showing the handle bars in a collapsed position;

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

FIG. 23 is an exploded view of a handle bar locking arrangement in the stroller;

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

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

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

FIG. 27 is a schematic view of another state of FIG. 26;

FIG. 28 is a cross-sectional view of the release switch of the stroller;

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

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

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

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

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 portion H of 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 of the stroller in accordance with another embodiment;

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

The reference numerals in the figures are illustrated as follows:

1. a side frame; 7. a storage basket; 8. a seat; 9. a frame;

100. a front foot bar; 110. a front wheel;

120. a groove; 1201. a first avoidance slot; 1202. avoiding the mouth; 1203. an arc-shaped slideway; 1204. a second mounting hole; 1205. a bayonet;

130. a forefoot frame; 1301. a first mounting hole;

140. a forefoot shell; 1401. a second avoidance slot; 141. a forefoot pedal;

150. a first pivot;

200. a rear foot bar; 210. a rear wheel; 220. bending the section;

230. a rear foot housing; 231. an installation table; 232. a circular hole; 233. a support arm; 234. a second pivot; 235. a second through hole;

240. a back leg framework; 241. an avoidance zone;

250. a rear foot crossbar;

300. a connecting rod; 310. a transverse section; 320. a upwarp section;

330. a connecting rod housing; 331. an L-shaped groove;

340. a connecting rod framework;

400. a handle bar; 401. a chute; 402. a first through hole; 403. a third guide groove; 404. a first channel;

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

430. supporting the boss;

440. a latch bolt; 4401. a kidney-shaped groove; 4402. abutting part

441. A first elastic member; 442. a first pull wire; 443. a drive member; 444. a bolt;

450. an upper handle bar;

451. positioning pins; 4511. a rectangular through hole; 4512. a first wire slot; 4513. a third avoidance slot;

452. a second elastic member;

453. a slider; 4531. a strip-shaped hole; 4532. a mating groove; 4533. a fourth elastic member; 4534. avoiding holes;

454. a positioning member;

4551. a release member; 4552. a locking member; 4553. a button;

4554. a pin hole; 4555. a third elastic member;

456. sealing the end; 4561. an upper end enclosure; 4562. a lower end enclosure; 4563. a first guide groove; 4564. a second guide groove; 4565. a second wire slot; 4566. a fourth avoidance groove;

457. a second pull wire;

458. a cup holder;

460. a lower handle bar; 461. a positioning pin hole;

500. a support bar;

600. an adapter; 601. a mounting seat; 602. a 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 and an included angle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present 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 a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components 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 in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

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

Referring to fig. 1 to 3, and fig. 19 to 22 and 38, the present embodiment provides a stroller, including a frame 9 and a seat 8 mounted on the frame 9, where the frame 9 includes two side frames 1 symmetrically disposed, each side frame 1 includes a handle bar 400, a front leg bar 100, a link 300 and a rear leg bar 200 hinged in sequence to form a foldable four-bar linkage, a hinge point between the handle bar 400 and the front leg bar 100 is a first hinge point 10, and a hinge point between the handle bar 400 and the rear leg bar 200 is a second hinge point 20, and in an unfolded state of the stroller, the first hinge point 10 is higher than the second hinge point 20, and the handle bar 400 and the rear leg bar 200 are respectively pivoted toward the front leg bar 100 from both sides of the front leg bar 100;

the handle bar 400 is a telescopic bar, and includes a lower handle bar 460 and an upper handle bar 450 which 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 stroller of the present application has two configurations, a deployed and a collapsed, relative height relationship, that can be combined with a view of all wheels lying on a level ground in the deployed configuration, such as in fig. 3; the folded state is such that the handle bar 400 approaches the front foot bar 100 until it interferes with the front foot bar 100 and cannot continue to approach, as shown in fig. 5.

The side supports are two groups and are symmetrically arranged on two sides (the relative position relationship is mainly emphasized here, and the structural details of the side supports and the side supports are not limited to be completely consistent), and each side support comprises a handle rod 400, a front foot rod 100, a connecting rod 300 and a rear foot rod 200.

The handle bar 400, the front foot bar 100, the rear foot bar 200 and the connecting rod 300 form a four-bar linkage in a hinged manner, and in the unfolding/folding process, the handle bar 400, the front foot bar 100, the rear foot bar 200 and the connecting rod 300 rotate and pull mutually by virtue of the four-bar linkage, so that the whole vehicle is unfolded and folded.

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

The upper handle bars 450 are supported by both hands of an operator, and the upper handle bars 450 on both sides are connected at the top through the holding rods 410, so that the holding area of both 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 and extension. The first hinge point 10 and the second hinge point 20 are located on the lower handle bar 460, so that the hinge points are close to the lower side, the first hinge point 10 is kept close to the bottom of the front foot bar 100 and the first hinge point 10 is kept close to the top of the handle bar 400, and when the handle bar 400 rotates around the first hinge point 10 to be folded, the two distances are close, so that the folding volume is small. Referring to fig. 38, a cup holder 458 for holding a water bottle is inserted into the upper handle bar 450, so that an operator can conveniently take the water bottle at any time.

With reference to fig. 3 to 5, for convenience of understanding the folding change, for example, the front leg rod 100 is fixed in a spatial position, the handle rod 400 rotates counterclockwise around the first hinge point 10 and is not continuously close to the front leg rod 100, meanwhile, the handle rod 400 in the rotation motion drives the second hinge point 20 to move, and accordingly, the rear leg rod 200 rotates around the second hinge point 20 and is not continuously close to the front leg rod 100 by virtue of the pulling of the connecting rod 300, and finally, the rear leg rod 200 is folded into a flat shape, so that the storage and carrying are convenient.

The seat 8 is used for carrying babies and children, can be a detachable independent component, does not influence the sitting 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 front foot bar 100 is provided with front wheels 110, and the 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 and the front wheel 110 on the same side are on the same plane, or may be staggered, for example, 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 extended without changing the overall height of the frame 9, so that at least a part of the two can interact with each other, thereby improving the stability of the frame 9, for example in one embodiment,

the handle bar 400 and the front foot bar 100 are supported against each other at a location between the first hinge point 10 and the second hinge point 20, and the support against each other is at least one of the following manners:

in the mode a, the handle bar 400 abuts against the front foot bar 100 when being unfolded to the limit position around the first hinge point 10;

mode b, both the handle bar 400 and the front leg bar 100 abut against each other in the frame width direction.

In order to further improve the safety and eliminate the potential hazard of clamping injury, the structures which are abutted against each other in the preferred embodiment are partially mutually contained, namely the force bearing parts which are mutually acted adopt a hidden mode.

As shown in fig. 3, in one embodiment, a connecting line between the first hinge point 10 and the second hinge point 20 forms an angle α of not more than 45 ° with the front leg bar 100.

When the included angle α is considered, the front foot bar 100 can be approximated to a straight bar or the overall extension trend of the front foot bar 100 is emphasized, when the shape of the front foot bar 100 is further complicated, only the part of the front foot bar adjacent to the first hinge point 10 can be concerned, the included angle α is not more than 45 degrees, 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 connecting line between the first hinge point 10 and the second hinge point 20 forms an angle α of 0 ° to 15 ° with the front leg bar 100.

When the included angle α is 0 °, the handle bar 400 and the front leg bar 100 are substantially in a straight line, and a part of the rear leg bar 200 (corresponding to the second hinge point 20) is basically attached to the front leg bar 100, so that the appearance is further concise and compact, and the stability and the overall strength of the frame 9 can be improved in an auxiliary manner.

As shown in fig. 3, in the present embodiment, the hinge point between the link 300 and the front leg 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 line connecting the first, second and third hinge points 30 forms a triangle, and the three hinge points are substantially collinear, one of the angles of the triangle is less than 15 °. In a preferred embodiment, an angle is less than 10 degrees, and the three hinge points are close to be in 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 leg link 200 is the fourth hinge point 40, and a connecting line between the first hinge point 10 and the fourth hinge point 40 is taken as a reference line. In the unfolded state, the second hinge point 20 and the third hinge point 30 are on the same side of a 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 to the inner side of the rear foot bar 200 to form a fourth hinge point 40, and the fourth hinge point 40 is hidden at the inner side of the rear foot bar 200, so that the appearance is more concise. In the unfolded state, the first, third and fourth hinge points 40 form a triangular area in the 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 located in the triangular area, which is more compact than the existing four-bar linkage. During folding, the second hinge point 20 moves and separates from the triangular area, and finally the second hinge point 20 and the third hinge point 30 are located 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 present embodiment, in the unfolded state, the second hinge point 20 and the third hinge point 30 are adjacent to each other. In contrast, in the folded state, the second hinge point 20 and the third hinge point 30 are away from each other.

In the unfolded state, the second hinge point 20 and the third hinge point 30 are adjacent to each other so 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, and the existence of four hinge points is difficult to find by far observation, so that the appearance is more concise. In the folding process, the front leg bar 100 is regarded as fixed, the third hinge point 30 does not move in space, the second hinge point 20 gradually leaves away from the third hinge point 30, and the handle bar 400 and the rear leg bar 200 are driven to mutually approach the front leg bar 100 from two sides of the front leg bar 100 by virtue of the rotation motion 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, during the folding process, the first hinge point 10 and the fourth hinge point 40 move away from each other and approach each other.

During the folding process, the movement locus of the second hinge point 20 passes through the reference line, and when the second hinge point 20 is located in the triangular area and gradually approaches the reference line, the first hinge point and the fourth hinge point 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 the largest. When the second hinge point 20 passes through the reference line and gradually moves away from the reference line, the first and fourth hinge points 40 gradually move closer to each other, and simultaneously the handle bar 400 and the rear leg bar 200 synchronously move closer to the front leg bar 100, and finally, the folding is completed.

As shown in FIG. 5, in one embodiment, the top of the rear leg bar 200 has a bent section 220, such that the rear leg bar 200 is close to the front leg bar 100 in the folded state.

The bending section 220 is bent forward from the top of the rear foot rod 200 to form an inflection point, and in the folded state, the rear foot rod 200 with the bending section 220 and the handle rod 400 form an accommodating space for accommodating 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 inflection point has an angle ranging from 90 to 180 degrees, so as to avoid interference between the rear foot bar 200 and the front foot bar 100.

The bending section 220 is formed by the back leg rod 200 as a whole or as a separate structure, and injection molding, casting, cold machining and the like can be adopted according to the material, so that the assembly of parts can be reduced and the structural strength can be increased when the integral structure is adopted.

As shown in fig. 6 and 7, in one embodiment, the handle bar 400 is provided with a support ledge 430 at a position adjacent to the second hinge point 20, and in the unfolded state, the support ledge 430 abuts against the bending section 220.

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, so as to support the handle bar 400 and improve the use stability in the unfolded state. The support surface is smaller than the upper surface of the bending section 220, ensuring that the support boss 430 is sufficiently supported by the bending section 220, and making the use of the handle bar 400 more stable. The upper surface of the bending section 220 is adapted to the supporting surface, so that the fit clearance is reduced as much as possible, and children are prevented from being injured by the clearance clamp.

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

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

The link 300 is disposed at the inner side of the front leg bar 100, and in the folded state, the link 300 of the L-shaped structure is staggered with the top of the front leg bar 100, so as to avoid interference with the front leg bar 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.

In another embodiment, as shown in fig. 8 and 9, the portion of the handle bar 400 between the first hinge point 10 and the second hinge point 20 is an extension 420, and the top of the front leg bar 100 has a groove 120 for receiving 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 and machined from the handle bar 400. At least one side of the edge of the groove 120 is provided with a first avoidance groove 1201 which avoids the extension section 420 during installation, after the assembly is completed, because the two ends of the extension section 420 both have installation gaps or hinge structures and are located below the front foot rod 100, the groove 120 shields the installation gaps or hinge structures at the extension section 420, and the children are prevented from touching the hinge point and being injured. 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 front foot bar 100 includes a front foot frame 130 and a front foot housing 140 covering the front foot frame 130, wherein the top of the front foot housing 140 extends out of the front foot frame 130, and the extended portion has a U-shaped cross section and encloses the groove 120.

The groove 120 is formed by integrally injection molding the front foot shell 140, and the surface of the groove 120 close to one side of the front foot rod 100 is closed and smoothly transits with the front foot shell, so that children are prevented from being injured by clamping. The U-shaped opening is oriented toward the side of the rear foot bar 200.

The front leg armature 130 is in the form of a rod that serves as the primary support for the front leg 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 shells 140 at two sides are connected by the front foot pedal 141 to form a U shape. The front foot pedal 141 is used for the passengers to place feet on one hand and reduces the shaking of the frame 9 along two sides on the other hand. In a preferred embodiment, the front foot pedal 141 is integrally formed with the front foot shell 140 to provide increased structural strength. The bottom of the front foot shell 140 is provided with a second avoidance groove 1401 for mounting the front foot framework 130, and the opening of the second avoidance groove 1401 faces downwards. With the groove 120, the front foot shell 140 is sleeved and embedded outside the front foot framework 130 from top to bottom and covers the extension section 420 by the groove 120, the front foot shell 140 and the extension section are fixedly connected and fixed by a bolt passing through a mounting hole, and the front foot framework 130 and the extension section 420 are covered when the second avoiding groove 1401 of the front foot shell 140 and the groove 120 at the top are mounted, so that the assembly is facilitated. The groove 120 covers the upper surface and both sidewalls of the extension 420 to restrict the handle bar 400 from rocking left and right.

In one embodiment, the first hinge point 10 is located at the junction of the recess 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 in the recess 120 to avoid that the child is pinched by the first hinge point 10. And the first hinge point 10 is hidden, the appearance is more concise.

As shown in fig. 11-14, in one embodiment, the bottom of the groove 120 is provided with an escape opening 1202 to allow the extension 420 to be folded toward the bottom of the groove.

The avoiding opening 1202 is formed in the bottom of the groove and is formed in the side close to the front foot rod 100, the width of the avoiding opening 1202 is matched with the width of the extending section 420, when the handle rod 400 rotates around the first hinge point 10, the handle rod 400 abuts against the bottom of the groove until the handle rod 400 cannot be folded continuously, the avoiding opening 1202 shortens the length of the bottom of the groove, the extending section 420 can rotate continuously and extends into the avoiding opening 1202, the handle rod 400 is further close to the front foot rod 100, and the size of the folded handle rod is reduced. Because the avoiding opening 1202 is located in an area which is easy to be released by children, the edge of the avoiding opening 1202 and the adjacent part of the extension section 420 are in smooth transition, on one hand, the distance between the assembling gaps is reduced, and children are prevented from being pinched. On the other hand, sharp corners 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 the two opposite sidewalls of the groove 120 and the extension section 420 at the first hinge point 10, the two opposite sidewalls of the groove 120 are provided with arc-shaped slideways 1203 distributed around the first pivot 150, and a guide step 421 matching with the arc-shaped slideways 1203 is disposed at a corresponding position of the extension section 420.

The first pivot 150 is a circular shaft, a projection point of a side surface where the axis is located is a 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 correspond to each other, the first pivot 150 penetrates through the second mounting hole 1204 and the third mounting hole 422 and then is fixedly connected with the groove 120, 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 ways 1203 and the guide steps 421 cooperate with each other to form a partially circular guide path, which is 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 protruded from the inner wall of the groove 120, and correspondingly, the guiding step 421 is concavely arranged at the corresponding position by the extending section 420.

In one embodiment, a locking mechanism is provided within recess 120 to maintain frame 9 in the deployed condition.

The locking mechanism is used for keeping the baby stroller in the unfolding state and avoiding folding when the baby stroller is normally pushed and pulled for use. Because the locking mechanism is provided with the assembly gap and the moving part, the locking mechanism is arranged and hidden in the groove 120 in the unfolding state, so that children cannot touch the locking mechanism, the children are prevented from being injured by clamping, and the appearance is simpler.

As shown in fig. 16 to 18, in one embodiment, the locking mechanism includes a bayonet 1205 disposed in the groove 120, a latch 440 telescopically mounted on an end of the handle bar 400, a first elastic member 441 disposed in the handle bar 400 for driving the latch 440 into the bayonet 1205, a first pull wire 442 connected to the latch 440, and a driving member 443 connected to the first pull wire 442 for driving the latch 440 out of the bayonet 1205.

The unfolded state is maintained by the locking tongue 440 extending into the bayonet 1205, the end of the handle 400 is provided with a sliding groove 401 for accommodating the locking tongue 440, the locking tongue 440 slides in the sliding groove 401, and the bayonet 1205 is arranged in the groove 120 corresponding to the position of the locking tongue 440. The connection state of the lock tongue 440 with the bayonet 1205 has two states of locking and unlocking:

in a locking state, the lock tongue 440 protrudes out of the sliding groove 401 and extends into the bayonet 1205;

the lock release state, the lock tongue 440 exits the bayonet 1205 and retracts into the slide slot 401.

In order to effectively maintain the automatic locking in the locked state and the unfolded state, a first elastic member 441 is disposed on the bottom surface of the sliding groove 401, the expansion direction of the first elastic member 441 is consistent with the sliding direction of the latch bolt 440, and the latch bolt 440 extends into the latch bolt 440 by the abutting of the first elastic member 441.

In order to prevent the locking tongue 440 from being separated from the sliding groove 401, a waist-shaped groove 4401 is formed on the side wall of the locking tongue 440, the length direction of the waist-shaped groove 4401 is in accordance with the sliding square shape of the locking tongue 440, correspondingly, a first through hole 402 adapted to the waist-shaped groove 4401 is formed on the two side walls of the sliding groove 401, and the bolt 444 penetrates through the waist-shaped groove 4401 and the first through hole 402 to limit the sliding position of the locking tongue 440. The interaction of the latch 444 and the first resilient member 441 enables the locking tongue 440 to extend into the bayonet 1205 without exiting the slide slot 401.

The bottom of the locking tongue 440 is fixedly bonded or bound with a first pulling wire 442, the other end of the first pulling wire 442 is bound or adhesively fixed with a driving element 443, and the driving element 443 is used for unlocking operation and is used for being pulled by an operator.

The unlocking operation is to toggle the driving member 443, pull the latch tongue 440 to retract into the slide groove 401 through the first pull wire 442 while the latch tongue 440 exits the bayonet 1205, the driving member 443 being generally disposed at a position easily accessible to an operator, facilitating unlocking of the locking mechanism in the recess 120.

With reference to fig. 17, the top of the side of the locking tongue 440 close to the bayonet 1205 is the abutting portion 4402, when the folded state changes toward the unfolded state, the abutting portion 4402 preferentially contacts the groove 120, the abutting portion 4402 is arc-shaped or bevel-shaped, so that the handle 400 conveniently contacts the arc surface or bevel surface of the abutting portion 4402 by the abutting of the groove 120 when changing from the folded state toward the unfolded state, and the handle automatically retracts into the sliding groove 401. When the locking tongue 440 is aligned with the bayonet 1205, the locking tongue 440 is inserted into the bayonet 1205 by the first elastic member 441 to complete the locking.

In one embodiment, as shown in fig. 19 and 20, the driving member 443 is a dial knob slidably mounted on the outer wall of the handle bar 400, and the first wire 442 extends through the interior of the handle bar 400 to extend out of the handle bar 400 and connect with the dial knob.

The outer wall of the handle rod 400 is provided with a third guide groove 403, the toggle part extends into the third guide groove 403 and is slidably mounted on the handle rod 400 in a buckling manner, the bottom of the handle rod 400 is provided with a first channel 404 for the stay wire to extend into the handle rod 400, the first channel 404 is communicated with the chute 401, and the first stay wire 442 extends into the handle rod 400 from the bottom of the lock tongue 440 through the first channel 404 and is fixedly connected with the toggle. By pulling the toggle button, the traction wire is pulled to drive the lock tongue 440 to exit the bayonet 1205, and the lock release 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 knob is within a range that the operator can easily release the knob, thereby facilitating the unlocking operation. In a further preferred embodiment, the third guiding groove 403 is disposed 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, in the deployed state, the second hinge point 20 is located within the recess 120.

The outer wall of the groove 120 is extended to cover the second hinge point 20 adjacent to the extension 420, so as to avoid children's injury and to make the appearance more concise.

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

Since the abutment portion has a fitting clearance in an area easily accessible to a child, the groove 120 covers the abutment portion and shields the fitting clearance so that the child is prevented from being pinched by the clearance.

As shown in fig. 22, in one embodiment, the upper handle bar 450 is provided with a retractable positioning pin 451, the lower handle bar 460 is provided with a positioning pin hole 461 matched with the positioning pin 451, and the relative sliding between the lower handle bar 460 and the upper handle bar 450 is limited when the positioning pin 451 is inserted into the positioning pin hole 461.

The positioning pin 451 is swept to form a sliding path along which the positioning pin hole 461 is disposed when the upper handle bar 450 slides along the lower handle bar 460, 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 always smooth without convex points.

The upper handle bar 450 and the lower handle bar 460 are engaged with each other by the positioning pin 451 and the positioning pin hole 461, and have:

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, so as to limit the upper handle bar 450 to continuously slide;

in the telescopic state, when the positioning pin 451 exits the positioning pin hole 461, the upper handle bar 450 can slide and extend along the lower handle bar 460.

As shown in fig. 22 to 25, in one embodiment, the upper handle bar 450 is provided with a second elastic member 452 for driving the positioning pin 451 into the positioning pin hole 461. The upper handle bar 450 is provided with a lock release switch and a sliding member 453 linked with the lock release switch, and the lock release switch is connected with the sliding member 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 to keep the positioning pin 451 extending into the positioning pin hole 461, and the second elastic member 452 is generally a spring. The slider 453 is a bar shape and is slidable in the upper handle bar 450.

In the preferred embodiment, the slide 453 slides in the same direction as the upper handle bar 450. The positioning pin 451 interacts with the sliding member 453 such that when the sliding member 453 slides toward the grip 410, the positioning pin 451 is forced to exit the positioning pin hole 461. The second wire 457 is connected in such a manner that a release switch can be provided at any position on the upper handle bar 450, and the release switch is provided on the grip lever 410 within an easy reach of an operator in order to facilitate the release operation of the operator.

The whole linkage process comprises:

in the unlocked state, the unlocking switch is toggled/pressed, the second wire 457 pulls the sliding member 453 to slide, the positioning pin 451 is driven to exit the positioning pin hole 461, and the second elastic member 452 is compressed to complete unlocking.

In the locked state, the release switch is released, and the resilient force of the second elastic member 452 drives the positioning pin 451 to extend into the positioning pin hole 461, thereby completing the locking.

In one embodiment, the number of the positioning pin holes 461 is multiple, and the positioning pin holes are arranged on the sliding path of the positioning pin 451 at intervals, so that multi-step adjustment is provided, and the operator can conveniently 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 groove 4513 for mounting the second elastic member 452, so as to limit radial shaking of the second elastic member 452, and thus the sliding and extension of the positioning pin 451 are more stable.

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

The locking mechanism can be used as the related parts of the above embodiments, for example, the locking mechanism includes a bayonet 1205 opened on the front foot rod, a lock tongue 440 mounted at the end of the handle rod 400 and retractable, a first elastic member 441 located in the handle rod 400 for 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 linked unlocking can simplify the unlocking operation, the driving part 443 of the above embodiment can be omitted in the present method, and the telescopic unlocking of the handle bar and the unlocking of the frame can be realized by using the unlocking switch.

In another embodiment, two driving methods for releasing the lock can be configured simultaneously, for example, the locking mechanism includes a bayonet 1205 opened on the front leg rod, a lock tongue 440 installed at the end of the handle rod 400 and retractable, a first elastic member 441 located in the handle rod 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 relative to the sliding member 453 and is slidably mounted on the handle bar.

In this method, the driving member 443 is retained, the driving member 443 and the unlocking switch are located at different positions of the frame, and the user can select a more convenient unlocking mode according to the relative position between the user and the frame or the operation habit.

The driving member 443 is slidably mounted on the inner sidewall of the lower handle bar 460 and slides in the sliding direction of the upper handle bar 450, so that the entire unlocking operation of the carriage 9 has:

unlocking operation a: the driving member 443 is toggled to drive the sliding member 453 to slide, the first pulling wire 442 is pulled, the locking tongue 440 exits the bayonet 1205, the frame 9 is folded, meanwhile, the positioning pin 451 exits the positioning pin hole 461, the handle bar 400 is folded in a telescopic manner, and the frame 9 is folded.

And (b) unlocking operation: the lock releasing switch is toggled/pressed to pull the second pull wire 457 to drive the sliding member 453 to slide, so as to pull the first pull wire 442, the positioning pin 451 exits from the positioning pin hole 461, the handle rod 400 is folded in a telescopic manner, meanwhile, the lock tongue 440 exits from the bayonet 1205, the frame 9 is folded, and finally, the whole vehicle is folded.

The first pulling wire 442 is connected with the sliding member 453, and the sliding member can be controlled to slide by the second pulling wire 457 or the driving member 443, so that the telescopic folding of the handle bar 400 and the folding of the frame 9 can be completed by one-time unlocking operation, the original two-time unlocking operation is omitted, and the use is convenient.

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

The limit structure is used to limit the sliding of the slider 453, and make the slider 453 have two limit positions:

a first limit position, in which the slide member 453 is restricted to continue to slide in the drawing direction of the second wire 457 and to extend into the hollow upper handle bar 450;

in the second extreme position, the slide 453 is restricted from coming out of the upper handle bar 450.

As shown in fig. 24, in one embodiment, the slide 453 has a strip-shaped hole 4531 along its moving direction. The limiting structure is a positioning member 454 fixed inside the upper handle bar 450, and at least a portion of the positioning member 454 extends into the strip-shaped hole 4531.

The strip-shaped hole 4531 is rectangular, an avoidance hole 4534 through which the positioning member 454 passes is formed in the side of the strip-shaped hole 4531 close to the upper handle bar 450, and a fourth elastic member 4533 (such as a spring) is installed in the strip-shaped hole 4531, when the second pull wire 457 pulls the slider 453, the slider 453 slides toward the upper handle bar 450, and meanwhile, the fourth elastic member 4533 is compressed by the positioning member 454 until reaching the first limit position after being incompressible. When the second wire 457 loses the pulling force, the resilient force of the fourth elastic member 4533 abuts against the positioning member 454, so as to push the sliding member 453 to reset until the avoiding hole 4534 abuts against the positioning member 454, thereby reaching the second limit position.

As shown in fig. 24 to 27, in one embodiment, the sliding member 453 has a fitting groove 4532, the positioning pin 451 is fitted on the sliding member 453, and a part of the positioning pin 451 is inserted into the fitting groove 4532.

The fitting groove 4532 is formed at one side perpendicular to the moving direction of the sliding member 453, and in the locked state of the positioning pin 451, the opening position of the fitting groove 4532 corresponds to the position of the second elastic member 452, and the positioning pin 451 can abut against the bottom of the groove by means of the second elastic member 452 and extend into the positioning pin hole 461. The periphery of the positioning pin 451 is provided with a rectangular through hole 4511 axially sleeved on the sliding member 453, and the upper wall of the rectangular through hole 4511 is always abutted against the bottom or wall of the fitting groove 4532 by virtue of the second elastic member 452.

The specific fit of the upper wall of the rectangular through hole 4511 with the bottom or wall of the slot is:

in a locking 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 groove bottom;

in the unlocking state, when the sliding member 453 slides to unlock, the groove wall of the fitting groove 4532 abuts against the upper wall of the rectangular through hole 4511 to lift the positioning member 454 in the sliding direction until the positioning pin hole 461 is withdrawn, and the unlocking is completed. In a preferred embodiment, referring to fig. 24-27, one side of the groove wall of the fitting groove 4532 is beveled to guide the alignment pin 451 out of the alignment pin hole 461. The fitting groove 4532 has two side groove walls, one side of which away from the upper handle bar 450 is a slope, and the angle between the side wall and the groove bottom is an obtuse angle, so that the positioning pin 451 can smoothly slide and exit from the positioning pin hole 461.

As shown in fig. 28, in one embodiment, the release switch includes: a release 4551 slidably mounted on the upper handle bar 450 and linked with the second pull wire 457, a locking member 4552 restricting the relative sliding of the release 4551, and a push button 4553 linked with the locking member 4552, the push button 4553 and the locking member 4552 abutting against each other for releasing the locking of the release switch by the locking member 4552.

The unlocking element 4551 is block-shaped and is slidably mounted in the middle of the holding rod 410, the sliding direction of the unlocking element 4551 is the radial direction of the holding rod 410, two sliding blocks (not shown) symmetrically arranged along the center line of the frame 9 are arranged inside 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, the sliding blocks and the unlocking element 4551 are mutually attached, and the attaching surface is an inclined surface. The bottom of the release 4551 is provided with a fourth mounting hole 602. The locking member 4552 is a column with a step at the bottom, and the sliding sleeve is embedded in the fourth mounting hole 602. The inside of the grip lever 410 is provided with a pin hole 4554 corresponding to a 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 lever 410 from top to bottom to limit the sliding of the release member 4551 and prevent the release member 4551 from being touched by mistake to cause the telescopic folding of the handle bar 400. To maintain the constraint on the release 4551, a third resilient member 4555 (e.g., a spring) is disposed within the fourth mounting bore 602, and the third resilient member 4555 is configured to abut against the locking member 4552 and urge the locking member 4552 into the pin bore 4554. The button 4553 is slidably mounted to the lower portion of the grip 410 by a snap-fit connection and abuts a step of the locking member 4552.

When the button 4553 is pressed to push the locking member 4552 to exit the pin hole 4554 and compress the third resilient member 4555, the release member 4551 can slide relative to the grip 410. The unlocking member 4551 is pressed to slide towards the inner side of the holding rod 410, the sliding block is pushed to slide towards the center line of the frame 9 by virtue of the inclined surface of the sliding block, the sliding block pulls the second pull wire 457, the positioning pin 451 is driven to exit from the positioning pin hole 461, and the telescopic folding of the handle rod 400 at the position of the holding rod 410 is completed.

As shown in fig. 29, in one embodiment, a sealing head 456 is fixed to a bottom end of the upper handle bar 450 and located inside the lower handle bar 460, the sealing head 456 defines a first guiding groove 4563 and a second guiding groove 4564 which are communicated with each other, 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 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 sealing head 4561 is adapted to the inner wall of the upper handle bar 450, and the sealing head 456 is embedded into the upper handle bar 450 through the upper sealing head 4561 and is fixed by the positioning element 454. The upper handle bar 450 realizes sliding guide by virtue of the clearance fit of the lower seal head 4562 and the lower handle bar 460. The sealing head 456 also plays a role in guiding the positioning pin 451 and the sliding member 453, the inner wall of the first guide groove 4563 is matched with the positioning pin 451, the positioning pin 451 can slide along the inner wall of the first guide groove 4563, the sliding stability of the positioning pin 451 is improved, the occurrence of faults is reduced, and meanwhile, 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 avoiding groove 4566 extending to the positioning member 454 for mounting the second elastic member 452, so that the assembly of the second elastic member 452 is facilitated.

The end enclosure 456 replaces the upper handle bar 450 to complete the sliding guidance 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 through simple injection molding or other processes, which is convenient to process and saves raw materials.

In one embodiment, shown in fig. 25 and 29, the stroller is provided with a locking mechanism for maintaining the frame 9 in the deployed position, and a driving member 443 is mounted on the top of the lower handle bar 460 at a position beyond the closure 456, and the driving member 443 controls the locking mechanism to be unlocked through the first pull wire 442. The positioning pin 451 is provided with a first wire groove 4512 for avoiding the first pull wire 442.

Since the driving member 443 is located closer to the grip 410 than the sealing head 456, a first line groove 4512 is formed on the positioning pin 451 near the positioning pin hole 461, and a second line groove 4565 having the same cross-sectional shape as the line groove is formed on the sealing head 456 near the positioning pin hole 461. The first pull wire 442 penetrates through the first and second wire slots 4565, so that the assembly is convenient.

In another embodiment, shown in fig. 30, the stroller is further provided with an adapter 600 for movably inserting the seat 8, the rear side of the adapter 600 is hinged to the rear foot bar 200, and the front side of the adapter 600 is hinged to the connecting rod 300 through the supporting rod 500.

Adapter 600 is used for connecting seat 8, realizes the dismantlement of seat 8 and connects, conveniently accomodates and the folding of frame 9.

The adapter 600 is movably connected to the frame 9 via the support rod 500 and the hinge structure thereof, and can be folded and stored in the frame 9 to reduce the volume of the folded stroller, which changes with the unfolding/folding of the stroller.

The bottom of the seat 8 is provided with a socket which is matched with the adapter 600, and the adapter 600 and the socket are used for realizing the quick installation of the seat 8.

The support rod 500 is plate-shaped, and the thickness of the support rod itself is reduced 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 lever 500, and the rear foot bar 200 constitute a deformable four-bar linkage.

In the process of changing the four-bar linkage from the unfolded state to the folded state, three hinge points hinged by the adapter 600 and the support rod 500 gradually form a straight line, that is, the connecting line of the three hinge points is a triangle, in the folded state, one included angle α of the triangle is smaller than 10 degrees, the three hinge points are approximately collinear, and in the observation of the side surface, the adapter 600 is positioned in the range of the front foot rod 100 and the rear foot rod 200, so that the folded volume is reduced.

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

Because connecting rod 300 self is connected with three pin joint, and three pin joint is frame 9 stress point, consequently connecting rod 300 is L shape and is not straight rod shape, increases anti deformability. The transverse section 310 and the upwarp section 320 are of an integrated structure, so that the structural strength is high, and the material is saved. In a preferred embodiment, the connecting rod 300 is assembled by a connecting rod housing 330 and a connecting rod framework 340, the connecting rod housing 330 is concavely provided with an L-shaped groove 331, and the connecting rod framework 340 is nested in the L-shaped groove 331 and 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, the connecting rod 300 is connected to the fourth hinge point 40 with the rear foot bar 200. The adapter 600 is connected to the fifth hinge point 50 with the rear foot bar 200. 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 fourth, fifth pin joint 50 is the stress point and all is fixed in on back foot bar 200, consequently, fourth pin joint 40 and fifth pin joint 50 mutually close on, make hinge structure comparatively compact on the one hand, on the other hand concentrates the stress point, and then improves frame 9's stability through strengthening back foot bar 200 at the structural strength of this stress point, makes things convenient for back foot bar 200's structural design. If the fifth hinge point 50 intersects the fourth hinge point 40 closer to the rear side of the frame 9, the upwarp 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, affecting the 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 link 300 do not overlap with each other, facilitating assembly.

As shown in FIGS. 30-33, in one embodiment, the top of the rear leg bar 200 has a bent section 220 such that the rear leg bar 200 is adjacent to the front leg bar 100 in the folded position. The fourth hinge point 40 and the fifth hinge point 50 are both near the inflection point of the bending section 220.

The fourth hinge point 40 is located at a side of the inflection point close to 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 and the adapter 600 cannot interfere with each other all the time when folded. 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, when viewed from the side, the rear foot bar 200 and the handle bar 400 form an accommodating space for accommodating the front foot bar 100 by virtue of the bending section 220, so that the folded volume is further reduced, and the adapter 600 is also located in the accommodating space to avoid protruding out of 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 with each other through a cross bar 700.

The two adapters 600 are symmetrically arranged on the inner sides of the side brackets respectively, and provide two side supports for the seat 8, so that the child can be more stably seated. The crossbar 700 is a hollow circular tube, is horizontally inserted and fixed on the adapters 600 at two sides, and is used for supporting the middle part of the seat 8, so as to improve the riding comfort of children. The cross bar 700 is disposed at a concentrated arrangement area of the hinge point and located at the middle position of the frame 9, and further limits the shaking of the frame 9 along both sides.

The inner wall of the adapter 600 is provided with a mounting seat 601, the mounting seat 601 is provided with a fourth mounting hole 602 adapted to the outer wall of the cross rod 700, two ends of the cross rod 700 are inserted into the fourth mounting holes 602 on two sides and the cross rod 700 and the adapter 600 are fixed by fasteners, so that the cross rod 700 and the adapter 600 are assembled.

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

Because most of effort of seat 8 is acted on horizontal pole 700, consequently, from the side observation, horizontal pole 700 is located between fifth pin joint 50 and sixth pin joint 60 for effort can be roughly even distributes in fifth, sixth pin joint 60, avoids one side pin joint atress too big and leads to impaired in the use, influences product life and children's security. In a preferred embodiment, the cross bar 700 is positioned at the midpoint of the line connecting the fifth and sixth hinge points 60 such that the forces on the fifth and sixth hinge points 60 are substantially the same.

As shown in fig. 30, 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.

In the unfolded state, since the second and fourth hinge points 40 are both located on the rear foot bar 200, the fifth and sixth hinge points 60 are located between the second and fourth hinge points 40, so that the acting force from the seat 8 is concentrated and 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 handle bar 400 and the front foot bar 100 are in the same line, and the portion of the handle bar 400 between the first hinge point 10 and the second hinge point 20 is an extension 420, and the extension 420 is hidden inside the front foot bar 100 or inside the front foot bar 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 and machined from the handle bar 400. The extension 420 overlaps the front foot bar 100, so that the stress point of the first hinge point 10 and the second hinge point 20 is located at the overlapping portion of the extension 420 and the front foot bar 100, and compared with the existing single stress bar, the structural strength of the side frame 1 is improved. And when hidden inside or inside the front foot bar 100, the appearance is more concise.

As shown in FIG. 34, in one embodiment, the top of the rear leg bar 200 has a bent section 220 such that the rear leg bar 200 is close to the front leg bar 100 in the folded state, the rear leg bar 200 includes a rear leg frame 240 and a rear leg shell 230 covering the rear leg frame 240, and at least a portion of the rear leg frame 240 is located at the bent section 220.

The rear foot shell 230 is provided with a third avoiding groove 4513, and the shape of the inner wall of the third avoiding groove 4513 is adapted to the rear foot framework 240, so that the rear foot framework 240 does not protrude out of the rear foot shell 230 after being embedded and installed, the interference of the rotation of the inner connecting rod 300 or the adapter 600 is avoided, and the appearance is simpler. The hindfoot armature 240 is configured to bear a portion of the forces applied to the hindfoot bar 200, such that a portion of the hindfoot armature 240 is disposed at the bend section 220, thereby increasing the bearing capacity of the bend section 220.

Still be provided with between the both sides back foot pole 200 through pegging graft fixed back foot horizontal pole 250, restrict rocking of both sides back foot pole 200, improve frame 9 stability. The middle part of the rear foot rod 200 is provided with a brake pedal, correspondingly, the inner side of the rear wheel is provided with a brake system (not shown) linked with the brake pedal, thereby being convenient for the operator to tread.

The connection part of the front pedal 141 and the two side front foot rods 100 is bent inward, so that the front wheel 110 and the rear wheel 210 are in two planes, and after being folded, the rear wheel 210 and the front wheel 110 can be staggered and partially overlapped. And the volume after folding is further reduced by matching with the accommodating space formed by the bending section 220 and the handle rod 400 and used for accommodating the front foot rod 100.

As shown in FIG. 34, in one embodiment, the hindfoot housing 230 wraps around at least the lateral side of the hindfoot framework 240.

The third avoiding groove 4513 is formed in 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 framework 240, no assembly gap exists in the outer side of the rear foot rod 200, the surface is smooth, and the appearance is simpler.

As shown in FIG. 34, in one embodiment, the hindfoot armature 240 has a portion at the bend 220 and another portion extending from the inflection point of the bend 220 to a side away from the forefoot bar 100.

The shape of the side projection of the back foot framework 240 is close to the back foot shell 230, and the certain distance is extended from the inflection point to the bending section 220 and the direction of the rear wheel respectively, so that other surfaces of the back foot framework 240 except the inner wall are wrapped by the back foot shell 230, on one hand, the appearance is more concise, on the other hand, a part of acting force is dispersed, and the anti-deformation capacity of the back foot rod 200 is enhanced. Since the rear foot bar 200 is a main force-bearing member, the rear foot frame 240 and the rear foot casing 230 may be made of different materials, so as to improve the structural strength of the rear foot bar 200.

In one embodiment, the connecting rod 300 is connected to the fourth hinge point 40 with the rear foot bar 200, the adapter 600 is connected to the fifth hinge point 50 with the rear foot bar 200, and the second hinge point 20, the fourth hinge point 40, and the fifth hinge point 50 are all located on the rear foot casing 230.

The hindfoot frame 240 is nested within the hindfoot housing 230 such that the forefoot bar 100, the link 300, and the adapter 600 associated with the second, fourth, and fifth hinge points 50 need only be connected to the hindfoot housing 230 for ease of assembly.

As shown in fig. 35, in one embodiment, the rear foot casing 230 is provided with a plurality of mounting platforms 231 extending towards the inner side of the side frame 1, and the fourth hinge point 40 and the fifth hinge point 50 are provided with corresponding mounting platforms 231 for passing through corresponding pivot shafts.

The bottom of the second escape groove 1401 of the rear leg cover 230 is provided with a mounting base 231 projecting in the projection direction of the side frame 1. The two mounting platforms 231 are provided with round holes 232 for penetrating pivots, and the adapter 600 and the connecting rod 300 are hinged on the rear leg shell 230. The two mounting platforms 231 are connected in the second escape slot 1401, increasing the structural strength. And the height of the mounting table 231 exceeds the outer wall of the back foot framework 240, so that interference friction between the adapter 600 and the connecting rod 300 after assembly and the back foot rod 200 is avoided, and the folding smoothness is not influenced.

In one embodiment, the rear leg frame 240 is provided with an avoiding area 241 corresponding to the position of each mounting platform 231 at the inflection point of the bending section 220.

Since the height of the mounting table 231 is higher than the outer wall of the rear leg frame 240, the design of the escape area 241 facilitates the mounting of the rear leg frame 240.

In one embodiment, the inner edge of the relief area 241 is smooth, and at least a portion of the outer peripheral wall of each mounting land 231 abuts the inner edge of the relief area 241.

The shape of the inner edge of the avoiding region 241 is waist-shaped corresponding to the outer shape of the two mounting platforms 231, and the inner edges are attached to each other, so that the mounting gap is reduced, the acting force acting on the mounting platforms 231 is effectively transmitted to the rear foot framework 240, and the bearing capacity of the rear foot rod 200 is increased.

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

The bending section 220 connects a plurality of hinge points and abuts against the supporting bosses 430, so that the acting force of the front foot bar 100 and the handle bar 400 is transmitted to the bending section 220 through the supporting bosses 430, and the acting force of the seat 8 is transmitted to the bending section 220 through the adapter 600, therefore, the rear foot framework 240 at least extends to the abutting part to bear the acting force together with the rear foot shell 230, and the bearing capacity of the rear foot bar 200 is improved.

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

Because the second hinge point 20 is the 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 swing in the longer folding process, the rear foot shell 230 is provided with two symmetrical support arms 233 provided with the second through hole 235 at the clamping position, the handle bar 400 is inserted between the two support arms 233, the second pivot 234 penetrates through the second through hole 235 and fixes the handle bar 400 and the rear foot bar 200 relatively, and the axis point of the second pivot 234 is the second hinge point 20. Both ends of the second pivot 234 are supported via the both side support arms 233, so that the handle bar 400 and the rear foot bar 200 are more stable when rotated and folded.

The working principle of the utility model is as follows: firstly, the seat 8 is detached from the adapter 600 and separated from the frame, the unlocking part 4551 of the handle bar 400 is pressed, the second pull wire 457 pulls the sliding part 453 and drives the positioning pin 451 to exit the positioning pin hole 461, meanwhile, the sliding part 453 drives the first pull wire 442 to pull the lock tongue 440 to exit the bayonet 1205, the frame 9 is folded, the handle bar 400 rotates counterclockwise by taking the first hinge point 10 as a rotation center and approaches the front foot bar 100, the rear foot bar 200 rotates by being pulled by the connecting rod 300 and approaches the front foot bar 100 continuously 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 driver 443 may be dialed to perform the unlocking operation.

During the use, rotate handle bar 400 around first pin joint 10 clockwise and keep away from preceding foot bar 100, drive back foot bar 200 and keep away from preceding foot bar 100, connecting rod 300 also expands gradually, stretch into bayonet 1205 and accomplish the locking automatically until spring bolt 440, pull out handle bar 400, rely on locating pin 451 to stretch into locating pin hole 461 automatically, expand and accomplish, aim at the assembly with the adaptation seat on seat 8 and the frame at last, can use.

During the use process, the height of the upper handle bar 450 is adjusted by adjusting the positioning pin 451 to extend into the positioning pin hole 461 at different positions through the unlocking piece 4551.

The utility model discloses a baby's shallow has set up four at least pin joints that are used for folding for every pin joint's hinge mechanisms simplifies, has improved folding number of times and baby's shallow life. And the handle pole is extending structure, provides many gears on the one hand and adjusts, and on the other hand has reduced the volume after folding, conveniently folds and accomodates.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above examples are merely illustrative of several embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the claims. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The baby stroller convenient to fold comprises a stroller frame and a seat installed on the stroller frame, wherein the stroller frame comprises two side stroller frames which are symmetrically arranged, each side stroller frame comprises a handle rod, a front foot rod, a connecting rod and a rear foot rod which are sequentially hinged to form a foldable four-bar mechanism, a hinge point between the handle rod and the front foot rod is a first hinge point, and a hinge point between the handle rod and the rear foot rod is a second hinge point;

2. The stroller of claim 1, wherein the upper handle bar is provided with a retractable positioning pin, the lower handle bar is provided with a positioning pin hole matching with the positioning pin, and the positioning pin is inserted into the positioning pin hole to limit the relative sliding between the lower handle bar and the upper handle bar.

3. The stroller of claim 2, wherein the upper handle bar has a second resilient member disposed therein for driving the pin into the pin hole;

4. The stroller of claim 3, further comprising a locking mechanism to maintain the frame in the unfolded state;

5. The stroller of claim 3, wherein the upper handle bar has a stop structure disposed therein for limiting the travel of the slider.

6. The stroller of claim 5, wherein the sliding member has a strip-shaped hole along its movement direction;

7. The stroller of claim 3, wherein the sliding member has a mating slot, the positioning pin is sleeved on the sliding member, and a portion of the positioning pin is inserted into the mating slot.

8. The collapsible stroller as recited in claim 3, wherein said release switch comprises:

a lock member that restricts sliding of the lock release member;

9. The stroller of claim 3, wherein a sealing head is fixed to a bottom end of the upper handle bar and located inside the lower handle bar, the sealing head defines a first guiding groove and a second guiding groove therein, the first guiding groove and the second guiding groove are communicated with each other, the positioning pin is slidably mounted in the first guiding groove, and the sliding member is slidably mounted in the second guiding groove.

10. The stroller of claim 9, wherein the stroller is provided with a locking mechanism to maintain the frame in the unfolded position;