CN216580662U

CN216580662U - Children's barrow

Info

Publication number: CN216580662U
Application number: CN202122327039.2U
Authority: CN
Inventors: 洪涛; 马聪泉; 赵国松
Original assignee: Shaoxing Shangyu Rixing Hardware Products Co Ltd
Current assignee: Shaoxing Shangyu Rixing Hardware Products Co Ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-05-24
Anticipated expiration: 2031-09-24

Abstract

The application discloses a baby stroller, which has an unfolding state and a folding state, and comprises a seat and a frame, wherein the frame comprises a front foot rod, a rear foot rod and a hand push rod, the front foot rod and the hand push rod or the rear foot rod and the hand push rod are hinged with each other, a first locking mechanism for keeping the baby stroller in the unfolding state is arranged between the front foot rod and the hand push rod, the hand push rod comprises an upper handle rod and a lower handle rod which are nested in a sliding manner, and the first locking mechanism can be unlocked when the upper handle rod slides relative to the lower handle rod; the end part of the upper handle bar is provided with an unlocking piece for unlocking the first locking mechanism, the unlocking piece is movably connected with the upper handle bar, and a second locking mechanism for limiting the unlocking piece to move is arranged. The fixed state of the unlocking piece needs to be continuously pressed and controlled, misoperation is avoided, and multiple protection improves use safety.

Description

Children's barrow

Technical Field

The application relates to the technical field of children's vehicles, in particular to a child stroller with higher safety.

Background

Light pushchairs comprise a front foot bar, a handspike, two rear foot bars and a seat for a child to sit on, often with a folding function for carrying.

The existing foldable child stroller realizes the unlocking operation by means of the movement of a hand push rod, for example, a first locking mechanism is arranged between two or three of a front foot rod, a rear foot rod and the hand push rod and used for keeping the whole stroller frame unfolded, the hand push rod is two rod pieces which are nested in a sliding manner, a second locking mechanism is further arranged between the two rod pieces, after the second locking mechanism is unlocked, one rod piece in the hand push rod slides and can trigger the unlocking of the first locking mechanism, and then the unlocking operation of the whole stroller is completed. Realizes the folding of the hand push rod and the folding of the frame. In the initial use stage, the hand push rod is not familiar to the product and is easy to fold accidentally, so that the frame is unlocked easily, and accidents are easy to happen.

SUMMERY OF THE UTILITY MODEL

The application provides a children's shallow, when preventing to adjust the handspike, the accident leads to whole car to fold up, and the security is higher.

The utility model provides a children's shallow has expansion state and fold condition, and it includes seat and frame, the frame includes preceding foot bar, back foot bar, handspike and keeps children's shallow to be in the first locking mechanical system of expansion state, a serial communication port, the handspike is including sliding nested last handlebar stem and lower handlebar stem, the tip of going up the handlebar stem is provided with and is used for the unblock piece of first locking mechanical system, be swing joint between unblock piece and the last handlebar stem to be provided with the restriction the second locking mechanical system of unblock piece activity.

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.

In the present application, unless otherwise specified, the positional relationship of the components mentioned above means that in the unfolded state, the folded state generally means a completely folded state, and if an intermediate state is specified, it is also specified. When considered in combination with physical considerations, the various states are not intended to be specific to the current state, but rather should be understood to have the potential or ability to switch to the various states.

Optionally, the frame includes the mount pad that is used for installing the seat and intersect in a preceding foot pole, a handspike and two back foot poles of mount pad, the part of lower handle pole constitutes the mount pad, preceding foot pole or back foot pole with the mount pad is articulated each other, is provided with between the articulated each other first locking mechanism.

Optionally, go up handle pole and lower handle pole and be hollow tubular structure, the bottom fixed mounting of going up handle pole with handle pole clearance fit's end cap down, the deblocking spare axial slidable mounting be in on the end cap, slidable mounting has the driving piece of taking first chute on the end cap, first chute is relative the slip direction slope of driving piece, second locking mechanical system includes:

the sliding groove is arranged on the unlocking piece and is provided with two sections which are communicated and are respectively a first section parallel to the sliding direction of the unlocking piece and a second section staggered with the first section;

the first pin rod penetrates through the sliding groove and the first inclined groove, and when the driving piece slides, the first inclined groove guides the first pin rod to slide to enter the second section from the first section.

Optionally, the upper handle rod is provided with an unlocking button, the unlocking button drives the driving piece to slide through a pull wire, and a second elastic piece acting on the resetting of the driving piece is installed in the plug, so that the first pin rod enters the first section.

Optionally, a third elastic element acting on the unlocking element to slide and reset is installed in the plug, so that the first pin rod is located at the first section.

Optionally, the sliding groove is an L-shaped groove.

Optionally, a third locking mechanism for limiting the relative sliding between the upper handle bar and the lower handle bar is arranged between the upper handle bar and the lower handle bar.

Optionally, the third locking mechanism comprises:

the lock grooves are arranged on the lower handle rod at intervals;

the locking block is matched with the locking groove, and the locking block is radially and slidably arranged in the plug;

the driving piece is provided with a second inclined groove, a second pin rod matched with the second inclined groove is arranged on the locking block, and the driving piece slides to drive the locking block to withdraw.

Optionally, the second chute is provided with an avoidance area for the second pin rod to move in a sliding manner, and a fourth elastic piece acting on the locking block extending into the locking groove is arranged in the plug.

Optionally, the first locking mechanism includes a locking groove disposed on the front foot rod, a transmission member slidably mounted on the mounting seat and having a locking pin, and a first elastic member for driving the locking pin to be clamped into the locking groove, a linkage member interacting with the transmission member is slidably mounted at the bottom of the lower handle rod,

the unlocking piece is used for pushing the transmission piece to enable the locking pin to be separated from the locking groove.

The utility model provides a folding interlock of whole car folding middleware is regarded as to the unblock piece in children's shallow, and self still has corresponding state that prevents the maloperation, improves the safety in utilization.

Drawings

FIG. 1 is a structural view of a stroller (unloaded seat) according to an embodiment of the present application in a deployed state;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view of the first locking mechanism of FIG. 2 at section A-A;

FIG. 4 is a cross-sectional view of the first locking mechanism of FIG. 2 at section B-B;

FIG. 5 is a cross-sectional view of the first locking mechanism of FIG. 3 in a unlocked state;

FIG. 6 is a cross-sectional view of the first locking mechanism of FIG. 4 in a unlocked state;

FIG. 7 is a structural view of the stroller (with seat) of FIG. 1 during folding;

fig. 8 is a structural view of the stroller of fig. 7 in a folded state;

FIG. 9 is a side view of FIG. 7;

FIG. 10 is a front view of FIG. 8;

FIG. 11 is a cross-sectional view taken along line E-E of FIG. 10;

FIG. 12 is a disassembled view of the rear foot bar of the stroller in accordance with an embodiment of the present application;

FIG. 13 is an exploded view of a handle bar of a stroller in accordance with an embodiment of the present application;

FIG. 14 is a further exploded view of the plug of FIG. 13;

FIG. 15 is a structural view of the drive member of FIG. 14;

FIG. 16 is a structural view of the unlocking member of FIG. 14;

FIG. 17 is a structural view of the plug of FIG. 14;

FIG. 18 is a cross-sectional view of the push rod of FIG. 2 taken along line A-A;

FIG. 19 is a cross-sectional view of the handle bar at section B-B of FIG. 2;

FIG. 20 is an enlarged view of section C of FIG. 18 (with the unlocking member in the active condition and the second locking mechanism in the locked condition);

FIG. 21 is an enlarged view taken at section D of FIG. 10 (with the unlocking member in an active condition and the second locking mechanism in a locked condition);

FIG. 22 is a cross-sectional view of the release member of FIG. 20 in a secured condition and the secondary locking mechanism in a released condition;

FIG. 23 is a cross-sectional view of the release member of FIG. 21 in a secured condition and the secondary locking mechanism in a released condition;

FIG. 24 is a cross-sectional view of an unlocking member unlocking the first locking mechanism in the stroller in accordance with an embodiment of the present application;

fig. 25 is a structural view of a lock block of the second locking mechanism of the stroller according to an embodiment of the present application being locked in another lock slot.

The reference numerals in the figures are illustrated as follows:

100. a front foot bar; 101. a locking groove; 110. a connecting portion; 111. a first inclined plane;

200. a rear foot bar;

300. a handspike; 301. a locking pin; 302. a first elastic member; 303. a transmission member; 304. a linkage member; 305. a second elastic member; 306. a second inclined plane;

310. an upper handle bar; 311. unlocking the lock; 312. a chute; 313. a first stage; 314. a second stage; 315. a first pin rod; 316. an unlock button; 317. a pull wire;

320. a lower handle bar; 321. a plugging cap; 322. an avoidance groove; 323. a bump;

330. a mounting seat; 331. a guide groove; 332. a main body; 333. a seat adapter; 334. a bending section;

350. a plug; 351. a first guide groove; 352. a third elastic member; 353. a second guide groove;

360. a drive member; 361. a first chute; 362. a fifth elastic member; 363. a second chute; 364. an avoidance zone;

371. locking the groove; 372. a locking block; 373. a second pin; 374. a fourth elastic member;

400. a seat;

510. a first link; 520. a second link; 530. and a third link.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

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.

In this application, the terms "center", "length", "width", "thickness", "top end", "bottom end", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "axial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in some drawings, or based on the spatial attitude of the product in normal use, and are of course only for the convenience of describing and simplifying the present invention, and do not indicate or imply that the position or element referred to must have a specific orientation, be of a specific construction and operation, and therefore should not be construed as limiting the present application.

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 application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The application provides a children's shallow has expansion state and fold condition, and expansion state indicates that children can take to carry the state of using, and fold condition indicates the state of folding up completely.

Referring to fig. 1 to 8, and 13 to 14, the stroller in this embodiment includes a seat 400 and a frame including a front leg 100, a rear leg 200, a handle 300, and a first locking mechanism for maintaining the stroller in a deployed state. The handle bar 300 includes an upper handle bar 310 and a lower handle bar 320 which are slidably nested, and the first locking mechanism can be unlocked when the upper handle bar 310 slides relative to the lower handle bar 320. Of course, when the upper handle bar 310 slides relative to the lower handle bar 320, the upper handle bar 310 has a state in which the first locking mechanism cannot be unlocked, and this state can prevent the entire vehicle from being folded accidentally due to misoperation.

Wherein two kinds of states can switch, and the concrete implementation mode does:

an unlocking piece 311 for unlocking the first locking mechanism is arranged at the end part of the upper handle rod 310, the unlocking piece 311 is movably connected with the upper handle rod 310, and a second locking mechanism for limiting the movement of the unlocking piece 311 is arranged. The upper handle bar 310 cannot interact with the first locking mechanism by itself when it is folded into the lower handle bar 320, but relies on the unlocking member 311 to unlock the first locking mechanism. The unlocking member 311 has, with respect to the upper handle bar 310:

in a fixed state, the unlocking piece 311 extends out and is opposite to the bottom of the upper handle rod 310, and in the sliding process of the upper handle rod 310, the unlocking piece 311 acts on the first locking mechanism to complete unlocking.

In an active state, the unlocking part 311 can move relative to the upper handle bar 310, so that when the upper handle bar 310 slides, the unlocking part 311 is acted by the components in the first locking mechanism to move towards the inside of the upper handle bar 310, and the first locking mechanism cannot be unlocked;

the state switching of the unlocking piece 311 is realized by a second locking mechanism, for example, the locking state of the second locking mechanism corresponds to the fixed state of the unlocking piece 311, and the unlocking of the second locking mechanism corresponds to the active state of the unlocking piece 311. When the second locking mechanism is in the unlocking state during normal use, when the length of the hand push rod 300 is adjusted, accidental unlocking of the frame caused by misoperation is avoided, safety accidents are eliminated, and the second locking mechanism is a two-way lock. When the frame is folded, the second locking mechanism needs to be locked first, so that the unlocking piece 311 enters a locking state.

Referring to fig. 13 to 25, in the present embodiment, the upper handle bar 310 abuts against the lower handle bar 320 during the sliding process, and the bottom of the rod member itself cannot act on the components in the first locking mechanism, so as to achieve the purpose that the upper handle bar 310 itself cannot unlock the first locking mechanism. The unlocking member 311 can extend out of the bottom of the upper handle bar 310, and particularly, in a fixed state, the unlocking member 311 can be regarded as a part of the upper handle bar 310, so that the length of the upper handle bar 310 is increased, and the first locking mechanism can be used for unlocking.

In one embodiment, the frame comprises a mounting seat 330 for mounting the seat 400, and a front foot bar 100, a hand push bar 300 and two rear foot bars 200 meeting the mounting seat 330, the lower handle bar 320 partially constitutes the mounting seat 330, and the front foot bar 100 or the rear foot bar 200 and the mounting seat 330 are hinged to each other, and a first locking mechanism is arranged between the two hinged to each other. The stroller of this embodiment is a light stroller, the mounting seat 330 is a separate component, and is inserted and fixed at the bottom of the lower handle bar 320, and the other bar members are intersected with the mounting seat 330, so that the structural strength of the mounting seat 330 is improved.

In some embodiments, the upper handle bar 310 and the lower handle bar 320 are hollow tubular structures, and a plug 350 which is in clearance fit with the lower handle bar 320 is fixedly installed at the bottom of the upper handle bar 310, so as to facilitate the processing of the two handle bars. The two handle rods are straight rods, the unlocking piece 311 is axially and slidably mounted on the plug 350, the unlocking piece 311 is plate-shaped, the axial direction corresponds to the length direction of any handle rod, namely the sliding direction of the unlocking piece 311 is consistent with the sliding direction of the upper handle rod 310, and the unlocking piece 311 is convenient to slide and extend into the plug 350 under the action of the first locking mechanism in an active state. In this embodiment, the plug 350 is slidably mounted with a driving member 360 having a first inclined groove 361, the first inclined groove 361 is inclined with respect to the sliding direction of the driving member 360, and the second locking mechanism includes a sliding groove 312 formed on the unlocking member 311 and a first pin 315 passing through the sliding groove 312 and the first inclined groove 361. The sliding groove 312 has two sections, which are a first section 313 parallel to the sliding direction of the unlocking member 311 and a second section 314 dislocated from the first section 313, and when the driving member 360 slides, the first inclined groove 361 guides the first pin 315 to slide from the first section 313 into the second section 314, so that the second locking mechanism is locked, and the unlocking member 311 enters a fixed state. The mutual displacement is understood that the length direction of the second section 314 is not parallel to the sliding direction of the unlocking element 311, and when the first pin 315 enters the second section 314, the unlocking element 311 is further restricted from sliding relative to the plug, and is switched to a fixed state. Preferably, the plug 350 is provided with a first guide groove 351 adapted to the second section 314, the first pin 315 penetrates through the first guide groove 351, and the driving member 360 enables the first pin 315 to enter the second section 314 more smoothly in the sliding process. The driving member 360 is U-shaped and has two arms, the two first chutes 361 are symmetrically disposed on the two arms, and the first pin 315 penetrates through the two first chutes 361.

In an embodiment, the upper handle bar 310 is provided with an unlocking button 316, the unlocking button 316 drives the driving member 360 to slide through a pulling wire 317, the sliding direction of the driving member 360 is along the length direction of the upper handle bar 310, and a fifth elastic member 362 acting on the resetting of the driving member 360 is installed in the plug 350, so that the first pin 315 enters the first section 313. The unlocking member 311 is in an active state when it is kept in a normal use state, and if it is folded, the unlocking button 316 needs to be pressed for a long time, so that the second locking mechanism is always in a locked state (the unlocking member 311 enters a fixed state, and the length of the upper handle bar 310 is relatively extended). The plug 350 is provided with a third elastic element 352 acting on the sliding reset of the unlocking element 311, so that the first pin 315 is located at the joint of the first section 313 and the second section 314 and can enter the first section 313 or the second section 314 at any time, and the state of the unlocking element 311 is switched more smoothly. In one embodiment, the sliding slot 312 is an L-shaped slot, i.e. the length direction of the first section 313 and the second section 314 is 90 °, and the locking effect of the second locking mechanism is better.

In one embodiment, a third locking mechanism is disposed between the upper handle bar 310 and the lower handle bar 320 for limiting the mutual sliding of the two handle bars, and is mainly used to adjust the length of the handle bar 300 to suit users with different heights. In one embodiment, the third locking mechanism includes a plurality of locking slots 371 spaced apart on the lower handle bar 320, and a locking block 372, the locking block 372 fits into the locking slots 371, the locking block 372 is slidably mounted in the plug 350 and fits with the driving member 360 and has:

in the locked state, the lock block 372 extends out of the upper handle rod 310 and is clamped into the lock groove 371;

in the unlocked state, the driving member 360 slides to drive the locking block 372 to exit the locking groove 371, while the second locking mechanism is in the locked state. The third locking mechanism must therefore be in lock while keeping the second locking mechanism always locked. The plug 350 is provided with a second guide groove 353, the driving member 360 is provided with a second inclined groove 363, and the locking block 372 is movably disposed in the second guide groove 353 and the second inclined groove 363 through a second pin 373. When the driving member 360 slides, the second inclined slot 363 drives the second pin 373 to slide along the second guiding slot 353. The second guide groove 353 has the same length direction as the sliding direction of the locking piece 372, and plays a role in sliding guide.

In the sliding process, the locking piece 372 has a process of abutting against the inner wall of the lower handle bar 320, so as to avoid that the driving piece 360 cannot reset due to the locking piece 372, the second locking mechanism is always in a locking state, and further misoperation is caused. The second inclined groove 363 has an avoidance zone 364 for the sliding movement of the second pin 373, the avoidance zone 364 is adapted to the second guide groove 353 to allow the sliding return of the locking block, and preferably, the second inclined groove 363 includes the avoidance zone 364 and is generally triangular. Wherein, a fourth elastic member 374 is arranged in the plug 350 and acts on the locking block 372 to extend into the locking groove 371. In combination with the driving member 360 having a U-shaped structure, the two second chutes 363 are symmetrically disposed on two arms of the driving member 360, and the second pin 373 penetrates through the two second chutes 363.

Referring to fig. 3 to 8 again, in an embodiment, the first locking mechanism includes a locking groove 101 disposed on the front leg lever 100, a locking pin 301 slidably mounted on the mounting seat 330, and a first elastic member 302 for driving the locking pin 301 to be clamped into the locking groove 101, and when the upper handle lever 310 slides relative to the lower handle lever 320, the locking pin 301 is driven to be disengaged from the locking groove 101. Specifically, the push rod 300 is a straight rod, which allows the upper handle rod 310 to be slidingly received into the lower handle rod 320, and finally acts on the locking pin 301 to make it slidingly escape from the locking groove 101, so as to unlock the first locking mechanism, complete folding of the entire vehicle, and simplify folding operations of the entire vehicle. The first elastic member 302 enables the locking pin 301 to be always clamped into the locking groove 101 in the unfolded state, so that the locking pin is prevented from being disengaged and accidentally folded.

Locking round pin 301 is the pin pole, has an axial and radial, and its circumference outer lane calliper is in locking groove 101, for convenient first elastic component 302, goes up handle pole 310 and other parts to its effect, wherein, the inside slidable mounting of mount pad has the driving medium 303 of fixed locking round pin 301, and first elastic component 302 is the spring, and butt driving medium 303 goes up handle pole 310 during the unblock and acts on driving medium 303. The transmission member 303 is plate-shaped, and is mounted on the locking pin 301 in the following manner: the locking pin 301 axially passes through the transmission member 303 and extends out of both sides of the transmission member 303 in the thickness direction. The sliding direction of the transmission member 303 slides in the radial direction of the locking pin 301, and both sides in the length direction thereof are respectively acted on by the first elastic member 302 and the upper handle bar 310.

In one embodiment, the lower handle bar 320 is inserted into and fixed to the mounting base 330, and the front foot bar 100 has a connecting portion 110 extending into the mounting base 330 and connecting with the mounting base 330. The mounting seat 330 at least includes a main body 332, a seat adapter 333, and a bending portion 334 connected to the push rod 300, and in the unfolded state, the connecting portion 110 abuts against the mounting seat 330, so as to limit the rotation of the front foot rod 100, and directly transmit the acting force applied to the mounting seat 330 to the front foot rod 100. And the hinge point of the hand push rod 300 and the front foot rod 100 is positioned in the mounting seat 330, so that the appearance is more concise.

The main body 332 of the mount is generally horizontally disposed to facilitate proper installation of the seat 400. The bottom of the handle bar 300 is fixedly connected to the bending portion 334, and the length direction of the handle bar forms a certain angle with the horizontal plane, so as to facilitate pushing. In addition, the mounting seat 330 may be integrally formed with the lower handle bar 320

The bottom of the lower handle bar 320 is located at the rear end of the mounting seat 330, the connecting portion 110 is a connecting rod, one end of the connecting rod extends out from the front of the mounting seat 330, and the other end extends to the rear end of the mounting seat 330 near the bending portion 334. In the unfolded state, the mounting seat 330 is fixedly connected to the handle bar 300, and is supported and reinforced by the connecting portion 110, thereby improving the use strength of the seat 400. Preferably, in the unfolded state, the upper edge of the connecting portion 110 abuts against the inner wall of the mounting seat 330 or the front foot bar 120 abuts against the front end of the mounting seat 330. Especially for light-weight children's pushchairs, the stability of the chair is improved more obviously.

In this embodiment, the mounting seat 330 is provided with a guide groove 331 for mounting the transmission member 303, for guiding the transmission member 303 to slide. In one embodiment, the length direction of the guide groove 331 is a horizontal direction.

Wherein the locking groove 101 is disposed at an edge of the connecting portion 110, and the connecting portion 110 has a first inclined surface 111 disposed adjacent to the locking groove 101 to guide the locking pin 301 into the locking groove 101. When the locking mechanism is rotated and unfolded, the first inclined surface 111 pushes the locking pin 301 to slide, and after the locking groove 101 is aligned with the locking pin 301, the first elastic member 302 enables the locking pin 301 to be clamped into the locking groove 101. The first locking mechanism is located inside the mounting seat 330 and hidden inside the mounting seat, and the appearance is concise.

In one embodiment, the locking pin 301 penetrates through the transmission member 303, two connecting portions 110 are symmetrically disposed on two sides of the transmission member 303, and two ends of the locking pin 301 are correspondingly engaged with the two locking grooves 101. Two connecting portion 110 have further improved the structural strength of mount pad 330, and with promoted the locking effect of first locking mechanical system, in addition, correspond light-duty children's shallow, handspike 300 is one, is in the line of symmetry of whole car, corresponds the driving medium 303 and also is in the line of symmetry, and the design manufacturing has been made things convenient for to the arrangement mode of above-mentioned connecting portion 110.

In one embodiment, a link 304 is slidably mounted in the handle bar and interacts with the transmission member 303, and the upper handle bar 310 abuts against the link 304 during sliding to drive the transmission member 303 to slide and unlock the first locking mechanism. The linkage member 304 is slidably mounted at the bottom of the lower handle bar 320 and is used for transmitting the acting force of the upper handle bar 310 to the transmission member 303, wherein a blocking cap 321 for limiting the linkage member 304 to be separated is sleeved at the bottom of the lower handle bar 320, an avoiding groove 322 is formed in the blocking cap 321, and the linkage member 304 and the transmission member 303 extend into the avoiding groove 322 and are mutually attached. In combination with the lower handle bar 320 and the mounting base 330 forming an included angle, the driving member 303 slides horizontally, and the linking member 304 slides along the length direction of the push rod. Wherein, the sliding directions of the transmission piece and the linkage piece form an included angle alpha, the included angle alpha corresponds to the included angle between the hand push rod 300 and the horizontal direction, and the included angle alpha is 15-75 degrees, preferably 55 degrees. Wherein, a second inclined plane 306 which is mutually attached when being mutually abutted is arranged between the transmission piece 303 and the linkage piece 304, which is convenient for the transmission of the force of the two parts which form an acute angle with each other.

In this embodiment, the second elastic member 305 acting on the linking member 304 is installed in the lower handle bar 320, and the second elastic member 305 is a spring and disposed between the blocking cap 321 and the linking member 304, so that the linking member 304 is rapidly reset, and meanwhile, a protrusion 323 for limiting the further sliding reset of the linking member 304 is sleeved in the lower handle bar 320.

With reference to fig. 9 to 12, in an embodiment, the rear foot bar 200, the front foot bar 100 and the mounting base 330 are hinged to each other, the hand push bar 300 is hinged to the first link 510, the front foot bar 100 is hinged to the second link 520, the rear foot bar 200 is hinged to the third link 530, the first link 510, the second link 520 and the third link 530 are hinged to each other, the first link 510, the second link 520, the mounting base 330 and the front foot bar 100 form a foldable four-bar linkage structure, and in an unfolded state, the first locking mechanism is locked, the bars in the four-bar linkage structure are fixed to each other, and the hinge points of the three links are not concentric with the hinge point of the rear foot bar 200 and the hand push bar 300, so that the corresponding rear foot bar 200 is fixed. During the folding process, the front leg bar 100 rotates to close to the handle bar 300, and the four-bar linkage drives the rear leg bar 200 to rotate to close to the handle bar 300 through the third connecting rod 530.

In the unfolded state, the first link 510 abuts against the handle bar 300, and the front leg bar 100 abuts against the mounting seat 330. Further maintaining the structural strength of the four-bar linkage structure in a fixed state.

With respect to the manner in which the first locking mechanism is disposed between the front foot lever 100 and the mounting seat 330, in another embodiment, the locking groove 101 may also be disposed on the mounting seat 330, the locking pin 301 is disposed on the front foot lever 100, and the specific structure of the locking groove 101, the locking pin 301, and the first elastic member 302 refers to the previous embodiment. In other embodiments, a first locking mechanism may also be disposed between the rear foot bar 200 and the mounting seat 330, and the specific structure of the first locking mechanism refers to the previous embodiments.

The unlocking piece in the child stroller has a fixed state and an active state, the second locking mechanism linked with the unlocking piece has a corresponding unlocking state and a locking state, the second locking mechanism is controlled by the unlocking button, the unlocking button is pressed for a long time to keep the second locking mechanism unlocked, and the unlocking piece is in the fixed state and finally unlocks the first locking mechanism. And in the sliding process of the upper handle bar, the unlocking button is manually released, the second locking mechanism has the opportunity to be locked again, the upper handle bar is limited to further slide, the unlocking piece is in an active state, the first locking mechanism cannot be unlocked, multiple protection is achieved, and the use safety is improved.

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 only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims

1. Children's shallow has expansion state and fold condition, and it includes seat and frame, the frame includes preceding foot bar, back foot bar, handspike and keeps children's shallow first locking mechanical system that is in expansion state, its characterized in that, the handspike is including sliding nested last handle bar and lower handle bar, the tip of going up the handle bar is provided with and is used for the unblock first locking mechanical system's unlocking piece, be swing joint between unlocking piece and the last handle bar to be provided with the restriction the second locking mechanical system of unlocking piece activity.

2. The stroller of claim 1, wherein the frame comprises a mounting seat for mounting a seat, and a front leg, a hand pushing rod and two rear legs meeting the mounting seat, wherein a part of the lower handle bar forms the mounting seat, the front leg or the rear leg is hinged to the mounting seat, and the first locking mechanism is disposed between the front leg and the rear leg.

3. The stroller of claim 2, wherein the upper handle bar and the lower handle bar are hollow tubular structures, a bottom of the upper handle bar is fixedly provided with a plug which is in clearance fit with the lower handle bar, the unlocking member is axially slidably mounted on the plug, a driving member with a first chute is slidably mounted on the plug, the first chute is inclined relative to a sliding direction of the driving member, and the second locking mechanism comprises:

4. The stroller as claimed in claim 3, wherein the upper handle bar is provided with an unlocking button, the unlocking button drives the driving member to slide by a pull wire, and a fifth elastic member acting on the driving member to return is installed in the plug, so that the first pin enters the first section.

5. The stroller as recited in claim 4, wherein a third resilient member is mounted in the plug to effect a sliding return of the unlocking member such that the first pin is disposed at the first section.

6. The stroller of claim 3, wherein the chute is an L-shaped slot.

7. The stroller of claim 3, wherein a third locking mechanism is disposed between the upper and lower handle bars to limit relative sliding movement therebetween.

8. The stroller of claim 7, wherein the third locking mechanism comprises:

the lock grooves are arranged on the lower handle rod at intervals;

9. The stroller as claimed in claim 8, wherein the second inclined slot has an escape area for sliding movement of the second pin, and a fourth resilient member is provided in the plug for acting on the locking piece to extend into the locking slot.

10. The stroller of claim 2, wherein the first locking mechanism comprises a locking groove formed on the front leg bar, a transmission member slidably mounted on the mounting seat and having a locking pin, and a first elastic member for driving the locking pin to be locked in the locking groove, the lower handle bar has a bottom slidably mounted with a linkage member for interacting with the transmission member,

the unlocking piece is pushed against the transmission piece to enable the locking pin to be separated from the locking groove in the sliding process of the upper handle rod and under the condition of limiting the activity of the unlocking piece.