CN107128350B

CN107128350B - Folding baby stroller

Info

Publication number: CN107128350B
Application number: CN201710355529.9A
Authority: CN
Inventors: 徐加洪
Original assignee: Dongguan Master Kids Products Co ltd
Current assignee: Dongguan Master Kids Products Co ltd
Priority date: 2017-05-19
Filing date: 2017-05-19
Publication date: 2023-07-21
Anticipated expiration: 2037-05-19
Also published as: CN107128350A

Abstract

The invention discloses a folding baby stroller, wherein a seat comprises a seat plate, a backrest plate and a front handrail component, the rear parts of two sides of the seat plate are provided with bases, the front parts of the bases are provided with first joint seats, the lower parts of two sides of the backrest plate are provided with connecting seats, and the connecting seats can be respectively pivoted on the inner sides of the corresponding bases; the two ends of the front armrest component are provided with second joint seats, the second joint seats can be pivotally arranged on the corresponding first joint seats, the connecting seats are provided with locking pins, the inner sides of the bases are provided with first locking grooves which are matched with the locking pins in a position corresponding to the locking pins, the locking pins can move between the positions of being clamped into the first locking grooves and the positions of being withdrawn from the first locking grooves along the connecting seats, the bases and the connecting seats can be locked when the locking pins are clamped into the first locking grooves, a brace and a brace driving mechanism with a driving button are arranged on the backrest, the lower ends of the braces are connected with the locking pins, and the upper ends of the braces are connected with the brace driving mechanism. The folding and unfolding device can realize folding and unfolding operation by one hand, and is convenient to operate and high in efficiency.

Description

Folding baby stroller

Technical Field

The invention relates to the technical field of baby strollers, in particular to a folding baby stroller.

Background

The baby carriage is a bearing moving tool designed for babies (or young children), is convenient for adults to carry babies to go out for playing or shopping, and the like, can properly hold light and small articles, and is deeply favored by parents.

A conventional folding stroller comprises a foldable frame and a seat, wherein the seat is mainly made of a flexible textile fabric (which may be filled with cotton if necessary). And its seatpad and back pad are through being located the seatpad carrier pipe and the back bracing piece bearing force of frame both sides respectively, and when using, flexible seatpad and back pad can be because of the serious sunken deformation in middle part of atress, and the atress is very uneven, therefore, the comfort level that the baby sits, crouches is relatively poor, and is unsightly.

For this reason, the folding baby stroller seat that sits comparatively comfortable has also appeared to prior art, and it includes that the face pad of taking charge is equipped with the bedplate of flexible seatpad, the face of taking charge is equipped with the back board of flexible cushion, and wherein, the back of the both sides of bedplate is equipped with the connecting seat, and the connecting seat is connected with handrail pipe subassembly and through the joint assembly the back board, the bedplate with the back board is the platelike structure that adopts plastics to make, and structural strength and stability are better, during the use, can not take place serious sunken deformation because of the atress (i.e. the baby sits on it promptly), consequently, can improve the comfort level that the baby sits the lying, and whole appearance is more pleasing to the eye. However, the existing folding baby stroller seat still has the defects that the folding baby stroller seat does not have the function of single-hand linkage folding and unfolding, two hands are needed in the folding and unfolding process, the folding and unfolding efficiency is low, the problem of inconvenience exists, and the folding and unfolding efficiency of the whole folding baby stroller is reduced.

Disclosure of Invention

The invention mainly aims to provide a folding baby stroller, which aims to realize the single-hand linkage folding and unfolding operation of a seat of the folding baby stroller so as to improve the convenience of the folding and unfolding operation of the baby stroller.

In order to achieve the above-mentioned purpose, the present invention provides a folding stroller, comprising a frame and a seat, wherein the frame comprises a folding joint assembly, a front foot tube, a rear foot tube and a handle assembly connected with the folding joint assembly, the folding joint assembly is provided with a first locking device for locking the folding joint assembly to prevent the folding joint assembly from rotating, and the handle assembly is provided with an unlocking device for unlocking the folding joint assembly by the first locking device; the seat comprises a seat plate, a backrest plate and a front armrest assembly, wherein the rear parts of the two sides of the seat plate are provided with bases which can be pivotally arranged on the inner sides of corresponding frame vehicle collecting joint assemblies, the front parts of the bases are provided with first joint seats, the lower parts of the two sides of the backrest plate are provided with connecting seats, and the connecting seats can be respectively pivotally arranged on the inner sides of corresponding bases; the two ends of the front armrest component are provided with second joint seats, the second joint seats can be pivotally arranged on the corresponding first joint seats, the connecting seats are provided with locking pins, the inner sides of the bases are provided with first locking grooves which are matched with the locking pins at positions corresponding to the locking pins, the locking pins can move along the connecting seats between the positions clamped in the first locking grooves and the positions clamped out of the first locking grooves, when the locking pins are clamped in the first locking grooves, the bases and the connecting seats can be locked, the backboards are provided with braces and brace driving mechanisms with driving buttons, the lower ends of the braces are connected with the locking pins, the upper ends of the braces are connected with the brace driving mechanisms, when the driving buttons of the brace driving mechanisms are pressed, the braces can be driven to pull the locking pins out of the first locking grooves so as to release the locking pins to lock the bases and the connecting seats, and at the moment, the backboards can be pushed and the front armrest component can be driven to fold towards the bearing surface direction of the seat boards; when the seat is in a fully unfolded state and the pressure for pressing the driving button is removed, the brace driving mechanism drives the brace to reset and drives the locking pin to be clamped into the first locking groove so as to lock the base and the connecting seat.

According to the technical scheme, the connecting seat is provided with the locking pin which can move along the connecting seat between the position clamped into the first locking groove and the position withdrawn from the first locking groove, and the back plate is provided with the brace with the lower end connected with the locking pin and the brace driving mechanism for driving the brace to move. When the baby stroller seat is required to be folded, the driving button of the brace driving mechanism can be pressed by one hand to drive the brace to move and pull the locking pin out of the first locking groove, the locking of the locking pin to the base and the connecting seat is released, and then the back support plate is pushed to the bearing surface direction of the seat plate by one hand, so that the front armrest assembly can be driven to fold and overturn towards the seat plate direction until the folding operation is completed. When the seat needs to be unfolded, the back support plate can be reversely pulled by one hand, so that the back support plate swings in the direction away from the bearing surface of the seat plate until the seat is completely unfolded, the pressure for pressing the driving button is removed (namely, the driving button is released), at the moment, the brace driving mechanism drives the brace to reset and drives the locking pin to be clamped into the first locking groove so as to lock the base and the connecting seat again, and the back support plate and the seat plate are prevented from rotating relatively in the use process. The whole unfolding and locking process can be realized by the same linkage of one hand, and the folding and unfolding efficiency of the whole folding baby stroller is improved.

Drawings

FIG. 1 is a schematic view of a folding stroller of the present invention in a fully unfolded state;

FIG. 2 is a schematic view of the folding stroller with only the seat folded;

FIG. 3 is a schematic view of the folding stroller with only the seat and handle assembly folded;

FIG. 4 is a perspective view of the folding stroller with only the seat and handle assembly folded;

FIG. 5 is a schematic view of the folding stroller of the present invention in a fully folded condition;

FIG. 6 is a perspective view of the folded stroller seat of the present invention in an unfolded state;

FIG. 7 is a schematic view of the folded stroller seat of the present invention in an unfolded state with the cover plate removed;

FIG. 8 is a partially exploded schematic view of the folding stroller seat of the present invention;

FIG. 9 is an enlarged detail view of portion A of FIG. 8;

FIG. 10 is a right side view of the folded stroller seat of the present invention in an unfolded state;

FIG. 11 is a right side view of the folding stroller seat of the present invention folded to a position where the back plate just drives the front armrest assembly to rotate;

FIG. 12 is a right side view of the folding stroller seat of the present invention fully folded;

FIG. 13 is a left side view of the back rest panel of the folding stroller seat of the present invention;

FIG. 14 is a perspective view of the mounting base of the folding stroller seat of the present invention;

FIG. 15 is a schematic view of the connection of the braces and locking pins of the folding stroller seat of the present invention;

FIG. 16 is an exploded view of the folding joint assembly and the swivel base of the folding stroller of the present invention;

FIG. 17 is a view showing the engagement of the unlocking means and the third locking means of the folding stroller of the present invention;

fig. 18 is an enlarged detail view of part B of fig. 17.

Detailed Description

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

It should be noted that, in the embodiment of the present invention, directional indications (such as up, down, left, right, front, rear, top, bottom, inner, outer, vertical, lateral, longitudinal, counterclockwise, clockwise, circumferential, radial, axial … …) are referred to, and the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first" or "second" etc. in the embodiments of the present invention, the description of "first" or "second" etc. is only for descriptive purposes, and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a folding baby stroller.

As shown in fig. 1 to 18, in the embodiment of the present invention, the folding stroller includes a frame 100 and a seat, wherein the frame 100 includes a folding joint assembly 110, a front leg tube 120, a rear leg tube 130 and a handle assembly 140 connected to the folding joint assembly 110, a first locking device (not shown) for locking itself to prevent rotation is provided in the folding joint assembly 110, an unlocking device (not shown) for unlocking the folding joint assembly 110 by the first locking device is provided on the handle assembly 140, and front wheels and rear wheels are respectively mounted on the lower parts of the front leg tube 120 and the rear leg tube 130; the seat comprises a seat board 1, a backrest board 2 and a front armrest assembly 3, wherein the rear parts of the two sides of the seat board 1 are provided with bases 4 which can be pivotally arranged on the inner sides of corresponding frame receiving joint assemblies, the front part of the base 4 is provided with a first joint seat 41, the lower parts of the two sides of the backrest board 2 are provided with connecting seats 5, the connecting seats 5 are respectively pivotally arranged on the inner sides (the inner sides refer to the side walls of the middle part of the seat board 1, the base 4 is oriented to the side walls of the middle part of the seat board 1), and the outer sides of the bases 4 are connected with a frame (not shown) of the folding baby stroller; the front armrest component 3 is of a U-shaped tubular structure, two ends of the front armrest component are provided with second joint seats 6, the second joint seats 6 can be pivotally arranged (or hinged) on corresponding first joint seats 41, the connecting seats 5 are provided with locking pins 7, the inner sides of the bases 4 are provided with first locking grooves 42 matched with the locking pins 7 at positions corresponding to the locking pins 7, the locking pins 7 can move along the connecting seats 5 between the positions of being clamped into the first locking grooves 42 and the positions of being withdrawn from the first locking grooves 42, when the locking pins 7 are clamped into the first locking grooves 42 (at the moment, the seat is in an unfolding state), the bases 4 and the connecting seats 5 can be locked, the connecting seats 5 cannot rotate relative to the bases 4, the back rest plate 2 is also provided with a brace 10 and a brace driving mechanism 9 with driving buttons 91, the lower ends of the brace 10 are connected with the locking pins 7, when the seat of the baby stroller is required to be folded, the driving buttons 91 of the driving mechanism 9 can be pressed, and the brace 10 is driven by the brace driving mechanism 9 to pull the locking pins 7 out of the first locking grooves 42 so as to release the locking pins 7, and the seat plate 4 can be overturned to the seat plate (the seat plate is driven by the brace driving mechanism 9, and the seat plate is driven to rotate towards the top surface of the seat plate 2 or the seat plate is turned over) until the seat plate is folded back plate 1 has the top surface of the seat plate (1) has the seat plate) and the seat plate is turned over is completely; when the seat needs to be unfolded, the backrest plate 2 can be pulled reversely by one hand, so that the backrest plate 2 swings in a direction away from the bearing surface of the seat plate 1 until the seat is in a fully unfolded state, the pressure pressing the driving button 91 is removed, so that the brace driving mechanism 9 drives the brace 10 to reset, drives the locking pin 7 to be clamped into the first locking groove 42, and locks the base 4 and the connecting seat 5. Preventing the back rest plate 2 and the seat plate 1 from rotating relative to each other during use. The folding and unfolding processes of the whole seat can be realized by linkage of one hand, and the folding and unfolding device is convenient to operate and high in efficiency, so that the folding and unfolding efficiency of the whole folding baby stroller is improved.

It should be noted that the seat board 1 and the backrest board 2 can be preferably made of plastic, and are made of plastic, so that the seat board and the backrest board have the advantages of convenient molding and low cost. Meanwhile, in order to make the infant sit and lie comfortably, it is preferable that the bearing surface of the seat plate 1 and the bearing surface of the back plate 2 are respectively padded with a flexible seat cushion and a cushion for the infant to sit and lie.

In the embodiment of the present invention, as shown in fig. 7, 8 and 15, a guide groove 21 extending downward from an upper slope is provided on the bearing surface of the back plate 2, the brace 10 is slidably disposed in the guide groove 21, the brace 10 includes a base bar 101 and a branch bar extending from the lower end of the base bar 101 to the locking pins 7 at both sides, the branch bar includes a bending section 102 with an upper end connected to the lower end of the base bar 101 and a straight section 103 with an end connected to the lower end of the bending section 102, the other end of the straight section 103 is directly or through an intermediate member connected to the locking pin 7, and when the brace 10 is driven to move along the guide groove 21 by the brace driving mechanism 9, the locking pins 7 can be driven to move between the positions of being inserted into the first locking groove 42 and withdrawn from the first locking groove 42, so as to lock the base 4 and the connecting seat 5, or unlock the base 4 and the connecting seat 5. Specifically, each connecting seat 5 is provided with a guide through hole 51 opposite to the first locking groove 42, the position of the back plate 2 corresponding to the guide through hole 51 is provided with a guide chute 22 (see fig. 8 and 9) connected with the guide through hole 51, the other end of the straight line section 103 is provided with a connecting block 104, the connecting block 104 is arranged in the guide chute 22, the side wall of the part of the locking pin 7 positioned in the guide chute 22 is provided with an annular clamping groove 71, each connecting block 104 is provided with two first limiting plates extending to the outer side of the annular clamping groove in the direction of the guide through hole 51, each first limiting plate is provided with a clamping part 105 extending to the direction of the guide through hole 51, and when the connecting block 104 is pulled by the brace 10 to move along the guide chute 22, the connecting block 104 can drive the locking pin 7 to move along the guide through hole 51 between the positions of being inserted into the first locking groove 42 and exiting the first locking groove 42. This way of connection facilitates the disassembly and assembly of the locking pin 7. It should be noted that the locking pin 7 may also be directly attached to the connection block without affecting the use.

Further, as shown in fig. 7 and 8, the side wall of the guide groove 21 is provided with a second limiting plate 211, and the second limiting plate 211 extends to partially contact with the front surface of the brace 10 to limit the brace 10, so as to prevent the brace 10 from falling out of the guide groove 21 in use.

Specifically, as shown in fig. 6 to 8, the connection base 5 is pivotally mounted (or hinged) to the inner side of the base 4 by a pivot (or hinge shaft, such as a rivet or screw, not shown) and is rotatable about the axis of the pivot.

In the embodiment of the present invention, as shown in fig. 8, 9 and 13, an opening chute 43 is formed at the edge of the inner side (i.e., the side wall facing the middle part of the seat board 1) of the base 4, a locking block 11 is installed in the opening chute 43, a second locking groove (not shown) adapted to the locking block 11 is provided in the second joint seat 6, when the locking block 11 is clamped into the second locking groove, the second joint seat 6 and the base 4 can be locked, a first guide post 111 extending toward the connecting seat 5 is provided at the rear part of the locking block 11, a first driving groove 52 for inserting the first guide post 111 is provided at the area of the connecting seat 5 opposite to the first guide post 111, the first driving groove 52 includes a circular arc-shaped starting section 521 and a non circular arc-shaped driving section 522, the starting section 521 and the driving section 522 are connected, and when the starting end wall of the starting section 521 abuts against the first guide post 111, the seat is in a fully unfolded state, and during the rotation of the connecting seat 5 relative to the base 4, the first driving groove 52 and the first guide post 111 slide relatively. When the first guide post 111 slides relatively to the initial section 521 of the first driving groove 52, the first guide post 111 remains stationary in the opening chute 43, and when the first guide post 111 slides relatively to the driving section 522 of the first driving groove 52, the first guide post 111 moves back and forth along the opening chute 43 under the pushing of the groove wall of the non-circular driving section 522, and drives the locking block 11 to move between the positions of inserting into or withdrawing from the second locking groove (not shown). Thereby automatically locking or unlocking the second joint seat 6 and the base 4, thereby realizing the linkage folding and unfolding operation of the backrest plate 2 and the front armrest assembly 3 and improving the efficiency of the folding and unfolding operation.

Specifically, as shown in fig. 8, 9 and 13, the center of the circular arc-shaped starting section 521 and the rotation center of the connecting seat 5 are located on the same straight line (i.e. both are located on the axis of the pivot shaft), so as to ensure that the first guide post 111 remains stationary in the opening chute 43 when the first guide post 111 and the starting section 521 of the first driving groove 52 slide relatively. Further, the first driving groove 52 further includes a circular arc-shaped buffer section 523 extending from the end of the driving section 522, and the buffer section 523 is preferably located on the same line with the rotation center of the connecting seat 5, so as to buffer the sliding of the first guide post 111 along the opening chute 43, and when the first guide post 111 slides relatively to the buffer section 523 of the first driving groove 52, the first guide post 111 remains stationary in the opening chute 43, so as to prevent the first guide post 111 from moving too rapidly and being blocked.

Further, as shown in fig. 6 to 9 and fig. 13, the folding stroller seat of the present invention further includes a frame rod 8, two ends of the frame rod 8 are respectively provided with a mounting seat 81, the mounting seats 81 are pivotally mounted on the base 4, and after the backrest plate 2 is folded and rotated to a certain position toward the bearing surface of the seat plate 1 (see fig. 11), the mounting seats 81 can be driven to drive the frame rod 8 to fold toward the bearing surface of the seat plate 1 until the folding of the seat is completed (see fig. 12). Specifically, the mounting base 81 is pivotally mounted between the base 4 and the connection base 5, and the joint area between the mounting base and the connection base 4, 5 is annular, and is configured mainly so as not to hinder the rotation of the mounting base 81. At the same time, care should be taken not to hinder the movement of the locking pin 7. The surface of the connecting seat 5 facing the mounting seat 81 is provided with a second driving groove 53, the surface of the mounting seat 81 facing the connecting seat 5 is provided with a second guide post 811 extending into the second driving groove 53, when the second guide post 811 abuts against the starting end wall of the second driving groove 53, the seat is in a fully unfolded state (see fig. 10), when the backrest plate 2 is folded and rotated to a certain position in the direction of the bearing surface of the seat plate 1, the tail end of the second driving groove 53 abuts against the second guide post 811, when the backrest plate 2 continues to be folded and rotated in the direction of the bearing surface of the seat plate 1, the second guide post 811 can be driven to rotate, and the mounting seat 81 and the sail frame rod 8 can be folded and rotated along with the backrest plate 2 in the direction of the bearing surface of the seat plate 1 until the folding operation is completed (see fig. 12).

Further, as shown in fig. 6, 9 and 14, the mounting base 81 is provided with a circular arc limiting enclosing plate 812 or a circular arc limiting groove (not shown) extending in the direction of the connecting base 5 on one side of the connecting base 5, and the connecting base 5 is disposed on the circular arc limiting enclosing plate 812 or the circular arc limiting groove and can rotate relative to the circular arc limiting enclosing plate 812 or the circular arc limiting groove.

Further, as shown in fig. 7 to 9, a slot 44 adapted to the locking pin 7 is provided on a side of the base 4 facing the connecting seat 5 at a position corresponding to the position of the locking pin 7 when the seat is completely folded, the slot 44 is opposite to the locking pin 7, and after the pressure of pressing the driving button 91 is removed, the locking pin 7 can be inserted into the slot 44, and the connecting seat 5 and the base 4 are locked, so that the seat is prevented from being automatically unfolded under the condition of not being used. When the seat needs to be unfolded, the driving button 91 is pressed first to pull the locking pin 7 out of the slot 44 through the brace 10, then the back plate 2 can be rotated in a direction away from the bearing surface of the seat plate 1 until the seat is completely unfolded, and after that, the pressure of pressing the driving button 91 is removed, so that the brace 10 drives the locking pin 7 to be clamped into the first locking slot 42, and the seat in the unfolded state can be locked.

In the embodiment of the present invention, as shown in fig. 6 to 10, the back plate 2 is provided with a mounting groove 23 at a position above the guide groove 21, the bar driving mechanism 9 includes a driving button 91 and a reset top spring 92, the driving button 91 includes a main body mounted in the mounting groove 23 and capable of moving up and down along the mounting groove 23, and a driving part 911 extending backward from the main body and extending out of the mounting groove 23, the upper end of the reset top spring 92 abuts against the top wall of the mounting groove 23, the lower end abuts against the main body, when the driving part 911 is pressed upwards, the main body can be driven to overcome the top force of the reset top spring 92 and move upwards along the mounting groove 23, and the bar 10 is driven to pull the locking pin 7 out of the first locking groove 42, so as to unlock the base 4 and the connection seat 5, and after the pressure of the driving part 911 is removed, the reset top spring 92 can push the main body down along the mounting groove 23, and drive the bar 10 to push the locking pin 7 into the first locking groove 42, so as to lock the base 4 and the connection seat 5. Specifically, the front side of the mounting groove 23 is detachably and fixedly provided with a cover plate 24 which can cover the front side of the mounting groove 23 so as to limit the main body and prevent the main body from falling out of the mounting groove 23.

In the embodiment of the present invention, as shown in fig. 6 and 7, the top end of the brace 10 extends into the mounting groove 23 and is fixedly connected or clamped with the main body. The clamping mode is convenient to assemble and disassemble. The mode of fixing is higher in structural stability and can be selected according to the needs.

In the embodiment of the present invention, as shown in fig. 6, 8 and 9, the second joint seat 6 may be pivotally connected (or hinged) to the first joint seat 41 by a pivot (or a hinge shaft, such as a rivet, a screw, etc.), and may rotate around the axis of the pivot. Further, a reset torsion spring 61 is sleeved on the pivot, one end of the reset torsion spring 61 is elastically abutted against the first joint seat 41, the other end of the reset torsion spring 61 is elastically abutted against the second joint seat 6, when the back plate 2 rotates in a direction away from the bearing surface of the seat plate 1, the reset torsion spring 61 pushes the second joint seat 6 to rotate along with the connecting seat 5 until the second joint seat rotates to a preset position, and thereafter, the locking block 11 is gradually clamped into a locking groove (not shown) of the second joint seat 6 under the driving of a driving section 521 of the first driving groove 52 of the connecting seat 5 so as to lock the second joint seat 6 on the base 4.

It should be understood that, as shown in fig. 1 to 5, the structure of the vehicle receiving joint assembly 110 and the connection manner of the vehicle receiving joint assembly with the front leg tube 120, the rear leg tube 130 and the handlebar assembly 140 are all well known in the art, and for example, the embodiment disclosed in the patent application of chinese patent publication No. CN104828120 a may be adopted to ensure that the vehicle frame 100 can be folded and unfolded smoothly. In this embodiment, the retracting joint assembly 110 includes a middle joint 1101 fixedly coupled to the upper end of the rear foot tube 130, an outer joint 1102 pivotally coupled to the outer side of the middle joint 1101 and fixedly coupled to the lower end of the handlebar assembly 140, and an inner joint 1103 pivotally coupled to the inner side of the middle joint 1101 and fixedly coupled to the upper end of the front foot tube 120. When the frame 100 is in the fully extended state, a first locking device (not shown) may lock the inner joint 1103, the outer joint 1102, and the middle joint 1101 to prevent relative rotation between the front foot tube 120, the rear foot tube 120, and the handlebar assembly 140 during use. When the frame 100 needs to be folded, the front leg tube 120, the rear leg tube 130 and the handle assembly 140 can be folded after the unlocking device is driven to unlock the inner joint, the outer joint and the middle joint of the first locking device. It should be noted that the first locking device and the unlocking device are also known in the prior art and are well known to those skilled in the art, for example, the embodiments of the first locking device and the unlocking device disclosed in the chinese patent publication No. CN104828120 are adopted, and the structure and the working principle thereof are not repeated here.

In the embodiment of the present invention, the handle assembly 140 includes an upper handle tube 143, a bending joint set 142, and a lower handle tube 141 with a lower end fixedly connected to the outer joint, wherein the lower end of the upper handle tube 143 and the upper end of the lower handle tube 141 are respectively connected to the bending joint set 142, and the upper handle tube 143 can swing relative to the lower handle tube 141 by the rotation of the bending joint set 142. The bending joint set 142 is provided with a second locking device (not shown) for locking itself to prevent rotation thereof, so as to prevent the upper handlebar tube 143 from rotating relative to the lower handlebar tube 141 when the frame 100 is fully unfolded and in a use state, and the unlocking device can be used for unlocking the second locking device from locking the bending joint set 142, so that the upper handlebar tube 143 can be folded toward the lower handlebar tube 141 when not in use (see fig. 3), and the second locking device can realize linkage of the first locking device. It will be appreciated that the structure of the upper and lower handle tubes 143 and 141 and the connection of the upper and lower handle tubes 143 and 141 to the bending joint set 142 are known in the art, and as is well known in the art, for example, an embodiment disclosed in chinese patent publication No. CN104828120 a may be adopted, in which the bending joint set 142 includes an upper joint 1422 fixedly connected to the lower end of the upper handle tube 143 and a lower joint 1421 fixedly connected to the upper end of the lower handle tube 141, the upper joint 1422 and the lower joint 1421 being pivotally connected (see fig. 4), and when the locking of the upper joint 1422 and the lower joint 1421 by the second locking device is released, the upper handle tube 143 drives the upper joint 1422 to rotate relative to the lower joint 1421 until the upper handle tube 143 is folded. The second locking device is also known in the art and is known to those skilled in the art, for example, the embodiment of the second locking device disclosed in the chinese patent publication CN104828120 is adopted, and the structure and working principle thereof will not be described here. When folding is required, the safety button 180 mounted on the middle part of the upper handle tube 143 is pushed first, so that the driving button 190 mounted on the upper handle tube 143 can be pressed, and the locking of the upper joint 1422 and the lower joint 1421 by the second locking device is released (see fig. 4).

In the embodiment of the present invention, the inner side of each of the vehicle receiving joint assemblies 110 is pivotally connected to the rotating seat 200, the base 4 is detachably mounted (e.g. detachably inserted and fixed) on the corresponding rotating seat 200, a third locking device for locking the vehicle receiving joint assemblies 110 and the rotating seat 200 when the vehicle frame 100 is in the unfolded state is provided between the vehicle receiving joint assemblies 110 and the rotating seat 200, and the unlocking device is further used for unlocking the third locking device from locking the vehicle receiving joint assemblies 110 and the rotating seat 200. Specifically, the third locking device includes a locking groove 2001 formed at an edge of the rotating seat 200, and a locking post 300 slidably mounted on the vehicle receiving joint assembly 110, wherein the locking post 300 can move between a position of being locked into the locking groove 2001 and a position of being unlocked from the locking groove 2001, when the locking post 300 is locked into the locking groove 2001, the vehicle receiving joint assembly 110 and the rotating seat 200 can be locked, and after the locking post 300 is unlocked from the locking groove 2001, the locking of the vehicle receiving joint assembly 110 and the rotating seat 200 is released. The unlocking device can drive the lock cylinder 300 to withdraw from the locking groove 2001 after the upper handle tube 143 is turned down to the handle tube 141 (see fig. 4 and 16), so as to unlock the lock cylinder 300 from the retracting joint assembly 110 and the rotating seat 200.

Specifically, a first housing 1104 and a second housing 1105 are fixedly arranged on the inner side and the outer side of each middle joint 1101, the inner joint 1103 and the outer joint 1102 can be clamped between the first housing 1104, the rotating seat 200 can be pivotally connected to the inner side of the first housing 1104, and the lock cylinder 300 can be slidably arranged on the first housing 1104.

It will be appreciated that the first housing 1104 is provided with a reset element (such as a spring, not shown) for applying a force to the lock post 300 in the direction of moving into the lock slot 2001, the portion of the unlocking device between the bending joint 142 and the retracting joint assembly 110 includes a pull rope 410, a fixing block 420, a first reset spring 430, a pull block 440 and a driving member 450 located in the lower handle tube 141, wherein the fixing block 420 is fixedly arranged in the lower handle tube 141, the upper end of the pull rope 410 is connected with the upper joint 1422, the lower end of the pull rope 410 passes through the fixing block 420 and then is connected with the pull block 440, the upper end and the lower end of the first reset spring 430 are respectively elastically abutted against the fixing block 420 and the pull block 440, the upper end of the driving member 450 is fixedly connected with the pull block 440, the lower end of the retracting joint assembly 110 is located between the outer joint 1102 and the middle joint 1101, the lower end of the driving rod 500 axially extends into the rear leg tube 130, the end of the lock post 300 can be fixedly arranged in the lower handle tube 141, the first slot (the upper end of the driving member 500) of the pull rod 500 is connected with the second pin 450, the upper end of the second pin 450 is obliquely arranged between the first pin 450 and the second pin 700 and the second pin 500 is obliquely arranged, and the second pin 500 is obliquely arranged between the second pin 1 and the upper pin 500 is obliquely connected with the second pin 1 and the upper pin 500, and the upper pin is provided. In the process of retracting, after the upper handle tube 143 is folded down and drives the upper joint 1422 to rotate, the upper joint 1422 drives the cable 410 to overcome the elastic force of the first return spring 430 and pull the pull block 440 and the driving member 450 to move upwards (i.e. move upwards obliquely along the lower handle tube 141), the driving member 450 drives the second driving pin 700 to drive the driving rod 500 to slide in the direction of penetrating into the rear foot tube 130 by overcoming the elastic force of the second return spring 800 through the second driving groove 4501, and in the process of sliding the driving rod 500 in the direction of penetrating into the rear foot tube 130, the first driving pin 600 clamped into the first driving groove drives the lock post 300 to overcome the elastic force of the return element and withdraw from the lock groove 2001, so as to release the locking relationship between the first housing 1104 and the rotating seat 200.

Specifically, a guide pin (not shown) penetrating through the rear leg 130 is fixedly connected between the first housing 1104 and the second housing 1105, the lock post 300 and the driving rod 500 are respectively provided with a first strip-shaped guide hole 3001 and a second strip-shaped guide hole 5001 adapted to the guide pin, and are respectively slidably sleeved on the guide pin through the first strip-shaped guide hole 3001 and the second strip-shaped guide hole 5001, wherein the second return spring 800 is installed in the second strip-shaped guide hole 5001, the upper end of the second return spring 800 is elastically abutted against the upper wall of the second strip-shaped guide hole 5001, and the lower end is elastically abutted against the driving pin, so as to apply an elastic force for upward return movement to the driving rod 500, thereby pushing the driving rod 500 to move upward along the rear leg in the process of expanding the frame 100.

Further, a handle 170 is connected between the bases 4 on both sides, when the seat is folded, and after the handle assembly 140 is folded toward the rear leg 130, the handle 170 is lifted upward to lift the whole folding stroller, and the unlocked rear leg 130, the handle assembly 140 and the seat are turned toward the front leg 120 under the action of gravity until the whole folding stroller is completely folded. The folding stroller may be operated in the opposite steps until the entire stroller is completely unfolded, and the folding steps may be referred to in the opposite directions, so that the whole unfolding operation will not be described in detail.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. The folding baby stroller comprises a frame and a seat, wherein the frame comprises a cart collecting joint assembly, a front foot pipe, a rear foot pipe and a handle assembly, wherein the front foot pipe, the rear foot pipe and the handle assembly are connected with the cart collecting joint assembly, a first locking device for locking the cart collecting joint assembly to prevent the cart collecting joint assembly from rotating is arranged in the cart collecting joint assembly, and an unlocking device for unlocking the cart collecting joint assembly by the first locking device is arranged on the handle assembly; the seat comprises a seat plate, a backrest plate and a front armrest assembly, wherein the rear parts of the two sides of the seat plate are provided with bases which can be pivotally arranged on the inner sides of corresponding frame vehicle collecting joint assemblies, the front parts of the bases are provided with first joint seats, the lower parts of the two sides of the backrest plate are provided with connecting seats, and the connecting seats can be respectively pivotally arranged on the inner sides of corresponding bases; the both ends of preceding handrail subassembly are equipped with second joint seat, but second joint seat pivot dress is in corresponding first joint seat, its characterized in that: the connecting seat is provided with a locking pin, a first locking groove matched with the locking pin is formed in the inner side of the base at a position corresponding to the locking pin, the locking pin can move between a position clamped into the first locking groove and a position withdrawn from the first locking groove along the connecting seat, the base and the connecting seat can be locked when the locking pin is clamped into the first locking groove, a pull strip and a pull strip driving mechanism with a driving button are arranged on the back plate, the lower end of the pull strip is connected with the locking pin, the upper end of the pull strip is connected with the pull strip driving mechanism, and when the driving button of the pull strip driving mechanism is pressed, the pull strip can be driven to pull the locking pin out of the first locking groove so as to release the locking of the locking pin to the base and the connecting seat, and at the moment, the back plate can be pushed and the front armrest component can be driven to fold towards the bearing surface direction of the seat plate; when the seat is in a fully unfolded state and the pressure for pressing the driving button is removed, the brace driving mechanism drives the brace to reset and drives the locking pin to be clamped into the first locking groove so as to lock the base and the connecting seat;

an opening chute is formed in the edge of the inner side of the base, a locking block is arranged in the opening chute, a second locking groove matched with the locking block is formed in the second joint seat, the second joint seat and the base can be locked when the locking block is clamped into the second locking groove, a first guide pillar extending towards the direction of the connecting seat is arranged at the rear part of the locking block, a first driving groove for the first guide pillar to be inserted is formed in the area, opposite to the first guide pillar, of the connecting seat, the first driving groove comprises a circular arc-shaped initial section and a non-circular arc-shaped driving section, the initial section is connected with the driving section, when the initial end wall of the initial section abuts against the first guide pillar, the seat is in a fully unfolded state, the first driving groove and the first guide pillar relatively slide in the process of rotating the connecting seat relative to the base, the first guide pillar is kept stationary in the opening chute when the initial section of the first guide pillar and the first driving groove relatively slide, and the first guide pillar moves back and forth along the opening chute under the pushing of the groove wall of the non-circular arc-shaped driving section, and drives the locking block to withdraw from the second locking groove or move between the positions of the second locking groove.

2. The folding stroller of claim 1, wherein: the back support plate comprises a support bar, wherein the support bar comprises a base bar and support bars extending from the lower end of the base bar to locking pins at two sides, the support bars comprise bending sections, the upper ends of the bending sections are connected with the lower ends of the base bar, one ends of the support bars are connected with the lower ends of the bending sections, the other ends of the straight sections are directly connected with the locking pins or connected with the locking pins through intermediate pieces, and when the support bar is driven to move along the guide grooves through a support bar driving mechanism, the locking pins can be driven to move between positions of being inserted into the first locking grooves and being withdrawn from the first locking grooves.

3. The folding stroller of claim 2, wherein: the guide through holes opposite to the first locking grooves are formed in each connecting seat, the guide grooves connected with the guide through holes are formed in the positions, corresponding to the guide through holes, of the back plates, connecting blocks are arranged at the other ends of the straight line segments, the connecting blocks are arranged in the guide grooves, annular clamping grooves are formed in the side walls of the parts, located in the guide grooves, of the locking pins, two first limiting plates extending to the outer sides of the annular clamping grooves in the direction of the guide through holes are arranged on each connecting block, clamping portions extending to the annular clamping grooves are arranged on the first limiting plates, and when the pull bars pull the connecting blocks to move along the guide grooves, the connecting blocks can drive the locking pins to move along the guide through holes between the positions of being inserted into the first locking grooves and the positions of being withdrawn from the first locking grooves.

4. The folding stroller of claim 1, wherein: the connecting seat can be pivotally arranged on the inner side of the base through a pivot and can rotate around the axis of the pivot, the circle center of the circular arc-shaped initial section and the rotation center of the connecting seat are positioned on the same straight line, and the first driving groove further comprises a circular arc-shaped buffer section extending from the tail end of the driving section.

5. The folding stroller of any one of claims 1-4, wherein: the vehicle-collecting joint assembly comprises a middle joint fixedly connected with the upper end of the rear foot pipe, an outer joint which is pivotally connected to the outer side of the middle joint and fixedly connected with the lower end of the handle assembly, and an inner joint which is pivotally connected to the inner side of the middle joint and fixedly connected with the upper end of the front foot pipe, when the vehicle frame is in a fully unfolded state, the first locking device can lock the inner joint, the outer joint and the middle joint, and the driving unlocking device can be used for unlocking the inner joint, the outer joint and the middle joint by the first locking device.

6. The folding stroller of claim 5, wherein: the handle assembly comprises an upper handle pipe, a bending joint group and a lower handle pipe, wherein the lower end of the lower handle pipe is fixedly connected with the outer joint, the lower end of the upper handle pipe and the upper end of the lower handle pipe are respectively connected with the bending joint group, a second locking device for locking the handle assembly to prevent the handle assembly from rotating is arranged on the bending joint group, the unlocking device can be used for unlocking the second locking device from locking the bending joint group, the bending joint group comprises an upper joint fixedly connected with the lower end of the upper handle pipe and a lower joint fixedly connected with the upper end of the lower handle pipe, and the upper joint and the lower joint are in pivotable connection.

7. The folding stroller of claim 6, wherein: the inner side of each vehicle collecting joint component is pivotally connected with a rotating seat, the base is detachably arranged on the corresponding rotating seat, a third locking device for locking the vehicle collecting joint component and the rotating seat when the vehicle frame is in an unfolding state is arranged between the vehicle collecting joint component and the rotating seat, the unlocking device is further used for unlocking the locking of the vehicle collecting joint component and the rotating seat by the third locking device, the third locking device comprises a locking groove formed in the edge of the rotating seat and a locking column slidably arranged on the vehicle collecting joint component, the locking column can move between the positions of being clamped into the locking groove and the positions of being withdrawn from the locking groove, when the locking column is clamped into the locking groove, the vehicle collecting joint component and the rotating seat are locked, and after the locking column is withdrawn from the locking groove, the locking of the vehicle collecting joint component and the rotating seat is released.

8. The folding stroller of claim 7, wherein: the inner side and the outer side of each middle joint are fixedly provided with a first shell and a second shell which can clamp the inner joint and the outer joint in the middle, the rotating seat can be pivotally connected to the inner side of the first shell, and the lock column can be slidably arranged on the first shell.

9. The folding stroller of claim 8, wherein: the first shell is internally provided with a reset element which applies a motion acting force to the lock column in the direction of clamping the lock groove, the part of the unlocking device between the bending joint and the vehicle collecting joint component comprises a pull rope, a fixed block, a first reset spring, a pull block and a driving piece, wherein the pull rope, the fixed block, the upper end of the pull rope, the upper joint, the lower end of the pull rope, the fixed block, the pull block and the upper end of the first reset spring are fixedly connected with the pull block, the upper end and the lower end of the first reset spring are respectively elastically propped against the fixed block and the pull block, the lower end of the driving piece stretches into the position between the outer joint and the middle joint, a driving rod is movably arranged between the outer joint and the middle joint, the lower part of the driving rod axially stretches into the rear leg pipe, the end part of the lock column, which can stretch into the lock groove, is provided with a first driving groove facing the driving rod, the part of the driving piece extending into the space between the middle joint and the outer joint is provided with a second driving groove, the driving rod is connected with a first driving pin and a second driving pin which can be respectively clamped into the first driving groove and the second driving groove, a second reset spring which applies an upward inclined acting force to the driving rod is arranged in the rear foot pipe, in the process of taking up the vehicle, the upper handle pipe is folded down and drives the upper joint to rotate, the upper joint driving inhaul cable overcomes the elasticity of the first reset spring and pulls the pull block and the driving piece to move upwards, the driving piece drives the second driving pin to drive the driving rod to overcome the elasticity of the second reset spring to slide in the direction of penetrating into the rear foot pipe through the second driving groove, and in the process of driving rod sliding in the rear foot pipe, the first driving pin clamped into the first driving groove drives the lock column to overcome the elasticity of the reset element and withdraw from the lock groove so as to release the locking relation between the first shell and the rotating seat.