CN215663597U - Children's barrow - Google Patents

Abstract

The utility model discloses a baby stroller, wherein a frame comprises a push handle rod, an upper bracket and a lower bracket, wherein the push handle rod is rotatably connected with the upper bracket; the upper bracket comprises an upper connecting piece and a seat, the upper connecting piece comprises an upper rotating table, and the upper rotating table is provided with a first rotating plane which is arranged downwards; the lower support comprises a lower rotary table, the lower rotary table is provided with a second rotating plane which is arranged upwards, the first rotating plane and the second rotating plane are attached to each other, and the upper rotary table is rotatably connected with the lower rotary table through a central shaft. The child stroller further comprises a locking mechanism used for locking the upper support relative to the lower support and an unlocking mechanism used for unlocking the locking mechanism, and the locking mechanism is arranged between the upper rotary table and the lower rotary table. The baby stroller provided by the utility model has the advantages that the whole volume is obviously reduced, and the whole stroller body is stable and balanced; when the forward pushing state and the backward pushing state need to be switched, the push handle rod is rotated, the locking mechanism can be linked for unlocking, and the switching operation is simple and convenient.

Description

Children's barrow

Technical Field

The utility model relates to the technical field of children products, in particular to a stroller.

Background

The child stroller in the prior art has a forward pushing state in which a child pushes a traveler backwards and a backward pushing state in which a child pushes the traveler backwards, and the upper frame can rotate around a vertical shaft relative to the lower frame so as to be switched between the forward pushing state and the backward pushing state. In the prior art, when the stroller is observed from the side surface of the stroller, the upper frame is obviously higher than the lower frame, and the whole stroller has larger volume; there are also some stroller, which can be switched between forward and backward pushing states by moving the stroller out of the stroller.

Disclosure of Invention

The object of the present invention is to address the deficiencies of the prior art by providing an improved stroller.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a stroller comprising a frame having an expanded state and a collapsed state, the frame comprising in the expanded state: a handle pushing rod; the lower end part of the push handle rod is rotatably connected with the upper bracket through a rotating shaft, the upper bracket comprises an upper connecting piece and a seat arranged on the upper connecting piece, the upper connecting piece comprises an upper rotating table, and the upper rotating table is provided with a first rotating plane which is arranged downwards; the lower support is provided with a wheel assembly at the bottom and comprises a lower rotary table, the lower rotary table is provided with a second rotary plane which is arranged upwards, the first rotary plane and the second rotary plane are mutually attached, and the upper rotary table is rotatably connected with the lower rotary table through a central shaft; wherein, the axis of the rotating shaft extends along the left and right direction of the frame, the axis of the central shaft extends along the height direction of the frame, and the horizontal plane where the axis of the rotating shaft is located is intersected with the entity of the central shaft; the child stroller further comprises a locking mechanism used for locking the upper support relative to the lower support and an unlocking mechanism used for unlocking the locking mechanism, and the locking mechanism is arranged between the upper rotating table and the lower rotating table.

Preferably, the locking mechanism includes a first locking structure, a second locking structure, and a locking member, one of the first locking structure and the second locking structure is disposed on the upper turntable, the other is disposed on the lower turntable, the locking member is slidably disposed between the first locking structure and the second locking structure in an up-down direction, the locking mechanism further includes a first elastic member for providing a force required for the locking member to move toward the first locking structure, and if the locking mechanism is in a locked state, the locking member is cooperatively connected with the first locking structure and the second locking structure at the same time; and if the locking mechanism is in an unlocked state, the locking piece is separated from the first locking structure in a matched locking mode.

Preferably, a plurality of locking teeth are arranged on the peripheral wall of the outer side of the locking piece at intervals, and the first locking structure and the second locking structure are locking tooth grooves matched with the locking piece.

Preferably, the unlocking mechanism comprises an unlocking piece, the unlocking piece is arranged between the lower end part of the push handle rod and the locking piece, and the unlocking piece is used for driving the locking piece to move away from the first locking structure so as to enable the locking piece to be separated from the first locking structure for locking; a first unlocking mechanism used for enabling the unlocking piece to move away from the push handle rod is arranged between the lower end part of the push handle rod and the unlocking piece, and a second unlocking mechanism used for enabling the locking piece to move away from the first locking mechanism is arranged between the unlocking piece and the locking piece; if the unlocking piece moves away from the push handle rod by the first unlocking mechanism, the locking piece moves away from the first locking structure by the second unlocking mechanism; if the unlocking piece moves towards the push handle rod, the locking piece moves towards the first locking structure under the action force of the first elastic piece.

Preferably, the second unlocking mechanism comprises a reversing lock tooth and a reversing lock groove, the reversing lock tooth is fixedly arranged on the unlocking piece, the reversing lock groove is arranged on the locking piece, and if the locking mechanism is in a locking state, the reversing lock tooth is inserted into the reversing lock groove; if the locking mechanism is in an unlocked state, the reversing lock teeth are disengaged from the reversing lock grooves, and at least one reversing lock tooth abuts against the locking piece to enable the locking piece to be disengaged and locked with the first locking structure.

Preferably, the stroller has a forward-pushing state in which the seat faces away from the push handle rod and a backward-pushing state in which the seat faces the push handle rod, the unlocking mechanism includes an unlocking member disposed between a lower end portion of the push handle rod and the locking member, the unlocking member has a first unlocking member and a second unlocking member disposed on left and right sides, the first unlocking member has a first reversing lock tooth, and the second unlocking member has a second reversing lock tooth; the locking piece is provided with a reversing lock groove matched with the first reversing lock tooth or the second reversing lock tooth, and the reversing lock groove is provided with a first lock groove and a second lock groove; if the child stroller is in the forward pushing state and the locking mechanism is in the locking state, the first reversing lock tooth is inserted into the first lock groove, and the second reversing lock tooth is inserted into the second lock groove; if the child stroller is in the reverse pushing state and the locking mechanism is in the locking state, the first reversing lock tooth is inserted into the second lock groove, and the second reversing lock tooth is inserted into the first lock groove; and if the locking mechanism is in an unlocking state, the first reversing lock tooth and the second reversing lock tooth are disengaged from any reversing lock groove for locking.

Preferably, the inner wall of the first lock groove on the left side or the right side is an inclined wall, the inclined wall extends obliquely from bottom to top, and the first reversing lock tooth and the second reversing lock tooth are provided with inclined planes matched with the inclined wall.

Preferably, the stroller has a forward pushing state in which the seat faces away from the push handle rod and a backward pushing state in which the seat faces the push handle rod, the unlocking mechanism includes an unlocking member disposed between a lower end portion of the push handle rod and the locking member, the unlocking member has a first unlocking member and a second unlocking member disposed on left and right sides, the first unlocking member has a first pushing portion, and the second unlocking member has a second pushing portion; the lower end part of the push handle rod is provided with a push groove, the push groove is provided with a first groove which is positioned at the same side as the first pushing part and a second groove which is positioned at the same side as the second pushing part, the first groove and the second groove are arranged in a left-right asymmetrical mode, the unlocking mechanism further comprises a second elastic piece which is used for providing acting force required by the movement of the first pushing part or the second pushing part towards the push handle rod at the corresponding side, if the child stroller is in the forward pushing state and the locking mechanism is in the locking state, the first pushing part is at least partially positioned in the first groove, and the second pushing part is separated from the second groove; if the child stroller is in the reverse pushing state and the locking mechanism is in the locking state, the first pushing part is separated from the first groove, and the second pushing part is at least partially positioned in the second groove; if the locking mechanism is in an unlocking state, the first pushing part is separated from the first groove, and the second pushing part is separated from the second groove.

Preferably, the pushing groove is provided with a groove bottom and notches positioned at two sides of the groove bottom, and the pushing groove is also provided with two transition sections which obliquely extend from the groove bottom to the notches at two sides; if the locking mechanism is in a locking state, the top end of the first pushing part or the second pushing part abuts against the groove bottom.

Preferably, the lower carriage includes two sets of side supports that locate the left and right sides respectively, connects both sides the horizontal stand between the side support, the revolving stage sets firmly on the horizontal stand down, under the expansion state, every group the side support includes: the wheel assembly comprises a front wheel assembly arranged at the bottom of the front wheel bracket; the wheel assembly comprises a rear wheel assembly arranged at the bottom of the rear wheel bracket, and the upper end part of the rear wheel bracket is rotationally connected with the upper end part of the front wheel bracket; one end of the connecting rod is rotatably connected with the front wheel bracket; one end of the support rod is rotatably connected with the connecting rod, and the other end of the support rod is rotatably connected with the rear wheel support.

Due to the application of the technical scheme, the whole volume of the baby stroller provided by the utility model is obviously reduced, so that the gravity center of the upper bracket is reduced, and the whole stroller body is stable and balanced in pushing or rotating of the baby stroller; this locking mechanical system of children's shallow can be with the upper bracket for the lower carriage locking, adjusts to just pushing away the state or pushing away the state backward according to actual need, when needs are just pushing away and pushing away when changing between the state backward, rotates and pushes away the barre, can link the unlocking of locking mechanical system for upper bracket and lower carriage can rotate relatively, and the conversion operation is simple and convenient, and need not shift out the car with children, convenient to use. The locking mechanism in the utility model has good stability and higher strength.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic side view of a stroller in a forward-pushing position according to an embodiment of the present invention;

FIG. 2 is a perspective view of the stroller of this embodiment with the seat omitted;

FIG. 3 is a schematic side view of the stroller of this embodiment, wherein the push handle is unlocked and rotated forward;

FIG. 4 is a schematic perspective view of the stroller of this embodiment, wherein the upper frame is rotated relative to the lower frame;

FIG. 5 is a schematic perspective view of the stroller of this embodiment, wherein the upper frame continues to rotate relative to the lower frame;

FIG. 6 is a schematic side view of the stroller in the reverse-pushing state in the present embodiment;

FIG. 7 is a perspective view of the cross bracket and the upper link in this embodiment;

FIG. 8 is a perspective view of the first push rod coupling of the present embodiment;

FIG. 9 is a perspective view of a second push rod coupling of the present embodiment;

FIG. 10 is an exploded view of the locking mechanism and the unlocking mechanism of the present embodiment;

FIG. 11 is a perspective view of the lower turntable and locking member of the present embodiment;

FIG. 12 is a perspective view of the upper link in this embodiment;

FIG. 13 is a perspective view of the locking mechanism of the present embodiment in a locked position;

FIG. 14 is a perspective view of the locking mechanism of the present embodiment in an unlocked position;

wherein: 1000. a handle pushing rod; 2000. an upper bracket; 3000. a lower bracket; x, a first rotation center line; y, a second rotation center line; z, a third rotation center line;

100. a push rod joint; 200. an upper connecting member; 210. a seat attachment; 220. a central shaft; 300. a seat; 310. a seat portion; 320. an armrest portion; 330. a backrest part; 340. a leg rest; 400. a transverse bracket; 500. a front wheel bracket; 600. a rear wheel support; 700. a connecting rod; 800. a stay bar; 910. a front wheel assembly; 920. a rear wheel assembly;

1. an upper rotary table; 11. a first locking structure; 2. a lower turntable; 21. a second locking structure; 3. a locking member; 31. locking teeth; 321. a first locking groove; 322. a second locking groove; 4. a first unlocking member; 41. a first pushing part; 42. a first ejector rod; 43. a first unlocking portion; 431. a first spring; 44. a first unlocking block; 441. a first reversing lock tooth; 5. a second unlocking member; 51. a second pushing portion; 52. a second ejector rod; 53. a second unlocking portion; 531. a second spring; 54. a second unlocking block; 541. a second reversing lock tooth; 6. a first push rod joint; 61. a first push rod locking groove; 62. a first groove; 62a, a first trough bottom; 62b, a first transition section; 62c, a first notch; 7. a second push rod joint; 71. a second push rod locking groove; 72a second groove; 72a, a second groove bottom; 72b, a second transition section; 72c, a second notch; 8. a push rod locking block; 9. an unlock button.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the utility model may be more readily understood by those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "left-right", "height", "front-back" and the like indicate the orientation or positional relationship shown when an adult of a stroller holds a handlebar based on fig. 1, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, only a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. Further, the description of the upper, lower, left, right, etc. used in the present invention is only with respect to the positional relationship of the respective components of the present invention with respect to each other in the drawings.

Referring to fig. 1 to 6, a stroller includes a frame having an unfolded state and a folded state, the frame includes a push handle bar 1000, an upper bracket 2000 and a lower bracket 3000, a wheel assembly is disposed at the bottom of the lower bracket 3000, the push handle bar 1000 is rotatably connected to the upper bracket 2000 through a rotation shaft, and the upper bracket 2000 is rotatably connected to the lower bracket 3000 through a central shaft 220. Specifically, when the frame is in the deployed state:

the upper frame 2000 includes an upper link 200 and a seat 300 disposed on the upper link 200, in this embodiment, the seat 300 is detachably connected to the upper link 200, the upper link 200 has seat links 210 respectively disposed at left and right sides, a lower end portion of the push stick rod 1000 has a push rod joint 100, the push rod joint 100 is rotatably connected to an outer side portion of the seat link 210 about a second rotation center line Y (axis line of the rotation shaft) extending in the left and right directions of the vehicle frame. The upper connecting member 200 further comprises an upper turntable 1 disposed at the middle part, the upper turntable 1 has a first rotation plane disposed downward, the central shaft 220 is disposed at the middle part of the upper turntable 1, and the horizontal plane of the second rotation center line Y intersects with the entity of the central shaft 220, in this embodiment, the second rotation center line Y itself intersects with the entity of the central shaft 220. In general, a stroller has a member for directly supporting a child, such as a sitting bag, a sleeping bag, or a cradle, which is collectively referred to as a seat 300 in the present embodiment, and the orientation of the child when the child is seated in the seat 300 is referred to as the orientation of the seat 300. The seat 300 is rotatable about the first rotation center line X (the axis line of the center shaft) as a unit with the upper link 200. In this embodiment, the seat 300 specifically includes a seat portion 310, and an armrest portion 320, a backrest portion 330, and a leg rest 340 rotatably connected to the seat portion 310.

The push handle rod 1000 is arranged on the left side and the right side, the push handle rod 1000 itself can be telescopic or foldable, the holding position can also be arranged commonly used in the field, and the utility model is not limited. Specifically, in this embodiment, the handle bar 1000 includes an upper push rod and a lower push rod which are connected in a relatively rotating manner, and the upper ends of the handle bars 1000 on both sides are connected through a handrail. The lower ends of the push stick rods 1000 on both sides are respectively provided with a push rod joint 100.

The lower frame 3000 includes side frames at left and right sides, and a cross frame 400 extending in the left-right direction and connecting the side frames. The side bracket specifically comprises a front wheel bracket 500, a rear wheel bracket 600, a connecting rod 700 and a support rod 800, wherein the wheel assembly comprises a front wheel assembly 910 arranged at the bottom of the front wheel bracket 500 and a rear wheel assembly 920 arranged at the bottom of the rear wheel bracket 600; the upper end of the rear wheel bracket 600 is rotatably connected with the upper end of the front wheel bracket 500 around a third rotation center line Z; the front end of the link 700 is rotatably connected to the front wheel bracket 500 through a rotation shaft a, the upper end of the stay 800 is rotatably connected to the link 700 through a rotation shaft b, and the lower end of the stay 800 is rotatably connected to the rear wheel bracket 600.

In this embodiment, the upper end of the front wheel support 500 is fixedly connected to the horizontal support 400, the middle of the horizontal support 400 is provided with the lower turntable 2, the lower turntable 2 has a second rotation plane which is arranged upwards, the second rotation plane is attached to the first rotation plane of the upper turntable 1, the second rotation plane and the first rotation plane are circular surfaces with the same shape and size, the upper turntable 1 is rotatably connected to the lower turntable 2 through the central shaft 220, and the first rotation center line X extends along the height direction of the frame. The second rotation center line Y and the third rotation center line Z are arranged in parallel with each other, and the third rotation center line Z also intersects with the entity of the central shaft 220.

The upper support 2000 is rotatably connected to the lower support 3000 about a first rotation center line X, so that the push stick lever 1000 and the upper support 2000 as a whole can rotate in a horizontal plane about the first rotation center line X with respect to the lower support 3000. The upper bracket 2000 can freely rotate 180 degrees around the first rotation center line X from the forward position to the reverse position; accordingly, the stroller has at least two use states, in the present embodiment, the two use states are a forward pushing state and a backward pushing state: when the stroller is in the forward pushing state as shown in fig. 1, the seat 300 faces forward and back to the push handle bar 1000, the back part 330 of the seat 300 is inclined backward, the armrest part 320 faces forward, and the upper bracket 2000 is located at the forward position; when the stroller is in a reverse-pushing state as shown in fig. 6, the seat 300 is oriented rearward and faces the push stick rod 1000, the backrest portion 330 of the seat 300 is inclined forward, the armrest portion 320 is oriented rearward, and the upper bracket 2000 is located at a reverse position; the fore-aft direction of the stroller is referenced to the arrangement of the front wheel assembly 910 and the rear wheel assembly 920.

The directions of the stroller such as left and right, height, front and back refer to the left and right, height and front and back directions of the stroller when the stroller is in a forward pushing state (as shown in fig. 1) or a backward pushing state (as shown in fig. 6); the vertical, horizontal and other directions refer to the vertical, horizontal and other positions (as shown in fig. 1) when the stroller in the forward pushing state or the backward pushing state is placed on the horizontal ground, so as to facilitate the description of the present invention.

The stroller includes a locking mechanism for locking the upper frame 2000 with respect to the lower frame 3000 and an unlocking mechanism for unlocking the locking mechanism, the locking mechanism being provided between the upper turn table 1 and the lower turn table 2. In this embodiment, the stroller further includes a push handle rod locking mechanism for locking and unlocking the push handle rod 1000 and the upper bracket 2000 relatively, and when the push handle rod locking mechanism is unlocked and the push handle rod 1000 rotates around the second rotation center line Y, the locking mechanism can be unlocked in a linkage manner.

Referring to fig. 7 and 8, a pair of push handle bar locking mechanisms are provided between the left and right seat connectors 210 of the upper bracket 2000 and the push handle bars 1000 and the push rod joints 100 thereof on the corresponding sides. The structure of the push handle rod locking mechanism can adopt the prior art, and the utility model is not limited. In the embodiment, the push rod locking mechanism includes a connector locking groove (not shown) disposed on the seat connector 210, a push rod locking groove disposed on the push rod connector 100, a push rod locking block 8 movably disposed between the connector locking groove and the push rod locking groove, and an elastic member (not shown) for driving the push rod locking block 8 to move toward the push rod locking groove with a required force, wherein the push rod locking block 8 employs a locking tooth disc, and the connector locking groove and the push rod locking groove are locking tooth grooves disposed in cooperation. When the push handle rod locking mechanism is in a locked state, the push rod locking block 8 is simultaneously clamped with the connecting piece locking groove and the push rod locking groove, and the push handle rod 1000 cannot rotate relative to the upper bracket 2000; when the push handle bar locking mechanism is in the unlocked state, the push rod locking piece 8 is disengaged from the push rod locking groove and is only clamped with the connecting piece locking groove, and the push handle bar 1000 can rotate relative to the upper bracket 2000. For convenience of description, the push rod joints 100 on both sides are respectively defined as a first push rod joint 6 and a second push rod joint 7, when the stroller is in the forward pushing state, the first push rod joint 6 is located on the left side of the stroller frame, the second push rod joint 7 is located on the right side of the stroller frame, the first push rod joint 6 is provided with a first push rod locking groove 61, and the second push rod joint 7 is provided with a second push rod locking groove 71.

The push handle rod locking mechanism further comprises an unlocking assembly for enabling the push rod locking block 8 to be separated from the push rod locking groove for locking, the prior art can be specifically adopted, and the unlocking assembly comprises an unlocking button 9 arranged on the armrest of the push handle rod 1000.

The structures of the lock mechanism and the unlock mechanism in the present embodiment are specifically described below.

Referring to fig. 10 to 12, the locking mechanism includes a first locking structure 11, a second locking structure 21, and a locking member 3, in this embodiment, the first locking structure 11 is disposed on the upper turntable 1, the second locking structure 21 is disposed on the lower turntable 2, the locking member 3 is slidably disposed between the first locking structure 11 and the second locking structure 21 in the up-down direction, and the locking mechanism further includes a first elastic member (not shown in the drawings) for providing a force required to move the locking member 3 toward the first locking structure 11. Specifically, the locking member 3 is a locking tooth disk having a plurality of locking teeth 31 arranged at intervals on the outer peripheral wall, and the first locking structure 11 and the second locking structure 21 are both locking tooth grooves matched with the locking member 3.

If the locking mechanism is in a locking state, the locking piece 3 is simultaneously matched and locked with the first locking structure 11 and the second locking structure 21; if the locking mechanism is in the unlocked state, the locking member 3 overcomes the action force of the first elastic member to disengage and lock with the first locking structure 11, and only engages and connects with the second locking structure 21.

Referring to fig. 10 to 14, the unlocking mechanism includes an unlocking member disposed between the push rod connector 100 and the locking member 3, and the unlocking member is used to drive the locking member 3 to move away from the first locking structure 11, so that the locking member 3 is disengaged from the first locking structure 11. Further, be equipped with between putter joint 100 and the unlocking piece and be used for making the unlocking piece keep away from the first release mechanism that putter joint 100 moved, be equipped with between unlocking piece and the locking piece 3 and be used for making the locking piece 3 keep away from the second release mechanism that first locking structure 11 moved.

For convenience of description, the unlocking mechanisms on the left and right sides are distinguished, when the child stroller is in a forward pushing state, the unlocking piece on the left side is a first unlocking piece 4, the unlocking piece on the right side is a second unlocking piece 5, when the child stroller is in a process of being switched between the forward pushing state and a backward pushing state, the first unlocking piece 4 and the first push rod connector 6 are always located on the same side, and the second unlocking piece 5 and the second push rod connector 7 are always located on the same side.

First, taking the first unlocking member 4 as an example, it specifically includes a first pushing portion 41 disposed at an end portion close to the first push rod joint 6, a first unlocking block 44 disposed at an end portion close to the locking member 3, a first unlocking portion 43 fixedly connected to the first unlocking block 44, and a first push rod 42 connected between the first pushing portion 41 and the first unlocking portion 43, and all the above components are fixedly connected to form a whole.

The inner side of the first push rod connector 6 has a pushing groove, here a first groove 62, the first groove 62 has a first groove bottom 62a and first notches 62c located at both sides of the first groove bottom 62a, and two first transition sections 62b extending from the first groove bottom 62a to the first notches 62c at both sides in an inclined manner. The first push part 41 has slopes on both sides thereof to cooperate with the two first transition sections 62b, so that when the push bar 1000 is rotated with respect to the seat link 210, i.e., the first push rod connector 6 is rotated with respect to the first push part 41, one of the first transition sections 62b abuts against the slope of the first push part 41 and pushes the first push part 41 to move away from the push rod connector 100. Thus, in the forward-pushing state, the first groove 62 and the first pushing portion 41 form a first unlocking mechanism.

The first unlocking block 44 is disposed on the upper side of the locking member 3, specifically, in the inner cavity of the upper turntable 1 above the first locking structure 11, the first unlocking block 44 has three first reversing locking teeth 441 disposed downward, and the first locking structure 11 is provided with an opening through which the first reversing locking teeth 441 can pass. The locking member 3 is provided with two sets of reversing locking grooves, which are a first locking groove 321 and a second locking groove 322, and the number of the first locking groove 321 and the number of the second locking groove 322 are three respectively, and when the projection point of the first rotation center line X in the horizontal plane is taken as the symmetry center, the first locking groove 321 and the second locking groove 322 are arranged in a centrosymmetric manner. Further, in the forward-pushing state, the inner wall of each first locking groove 321 on the right side is an inclined wall that gradually extends from bottom to top and inclines to the right, and the right side wall of each first reversing locking tooth 441 is an inclined surface that matches with the inclined wall, and the inclined surface also gradually extends from bottom to top and inclines to the right. In the forward-pushing state, the first reversing lock tooth 441 and the first lock groove 321 form a second unlocking mechanism.

In addition, the first unlocking member 4 further includes a second elastic member, here a first spring 431, provided on the first unlocking portion 43 for providing a force required for the first push portion 41 to move toward the first push rod connector 6.

Accordingly, the second unlocking member 5 has substantially the same structure as the first unlocking member 4, and is symmetrically disposed. In the forward pushing state, the second unlocking member 5 includes a second pushing portion 51, a second push rod 52, a second unlocking portion 53 and a second unlocking block 54, which are fixedly connected to each other, the second unlocking block 54 has three second reversing locking teeth 541 arranged downward, the second reversing locking teeth 541 have inclined surfaces extending obliquely leftward from bottom to top, and the second unlocking portion 53 is provided with a second spring 531 for providing an acting force required by the movement of the second pushing portion 51 toward the second push rod joint 7.

In this embodiment, in the forward-pushing state, the inner wall of the second locking groove 322 on the left side of the locking element 3 is an inclined wall that gradually inclines and extends leftward from bottom to top, and is just correspondingly matched with the second reversing locking tooth 541.

Similarly, the pushing recess inside the second push rod connector 7 is a second recess 72, and the second recess 72 also has a second groove bottom 72a, a second transition section 72b and a second notch 72c, but the second recess 72 is different from the first recess 62 mainly in two points: in the forward-pushing state, the second groove 72 is located behind the first groove 62 in the front-rear direction of the frame, because the first groove 62 is mainly used for locking and unlocking the frame in the forward-pushing state, and the second groove 72 is mainly used for locking and unlocking the frame in the reverse-pushing state; second, the length of the first groove 62 is significantly greater than the length of the second groove 72, and the circumferential angle of the first groove 62 is about 180 °, because the frame can be folded under the forward pushing condition, when the push rod 1000 is turned backwards, the locking mechanism needs to be kept in the locking condition, so that the first pushing part 41 needs to be always located in the first groove 62 during the process of turning the push rod 1000 backwards.

In the reverse-pushing state, the second groove 72 and the second pushing portion 51 form a first unlocking mechanism, and the second direction-changing locking tooth 541 and the first locking groove 321 form a second unlocking mechanism.

It should be noted that, in the embodiment, due to the structural design characteristics, in the forward pushing state, the first unlocking block 44 is located at the front side of the second unlocking block 54, the two are abutted against each other, and a circular gap is formed between the two for the central shaft 220 to pass through.

The working principle of the stroller of the embodiment is specifically described as follows:

referring to fig. 1 and 13, when the stroller is in the forward-pushing state and the locking mechanism is in the locking state, the first pushing portion 41 is partially located in the first groove 62, and the top end of the first pushing portion 41 abuts against the first groove bottom 62 a; since the second groove 72 is not symmetrical to the first groove 62, the second pushing portion 51 is separated from the second groove 72 and located outside the second groove; accordingly, the first reversal locking tooth 441 is inserted into the first locking groove 321, the second reversal locking tooth 541 is inserted into the second locking groove 322, and the locking member 3 is simultaneously locked in cooperation with the first locking structure 11 and the second locking structure 21.

Referring to fig. 3 and 14, when the stroller needs to be converted into a reverse-push state, the unlocking button 9 is first pressed to unlock the push handle rod locking mechanism, and then the push handle rod 1000 is driven to rotate forward around the second rotation center line Y by a certain angle, so that the inclined surface of the first pushing portion 41 moves along the first transition section 62b toward the first notch 62c, so that the first unlocking member 4 moves away from the first push rod connector 6 as a whole, i.e., moves rightward, so that the inclined surface of the first reversing locking tooth 441 moves rightward along the inclined wall of the first locking groove 321 until the first reversing locking tooth 441 moves onto the upper surface of the locking member 3, and the locking member 3 is pressed downward, so that the locking member 3 is disengaged from the first locking structure 11, and the locking mechanism is unlocked. In this process, the second unlocking member 5 is always kept stationary, and the second pushing member 51 is always located outside the second recess 72, but since the first unlocking member 4 moves the locking member 3 downward, the second reversal locking tooth 541 is also disengaged from the second locking groove 322 accordingly.

Referring to fig. 4 and 5, after the locking mechanism is unlocked, the push handle rod 1000 and the upper bracket 2000 can rotate around the first rotation center line X as a whole, and reach the reverse position after rotating 180 degrees, and then drive the push handle rod 1000 to rotate backwards around the second rotation center line Y until the locking mechanism is locked.

Referring to fig. 6 and 13, when the stroller is in the reverse-push state and the locking mechanism is in the locked state, the locking mechanism is in substantially the same state as when the stroller is in the forward-push locked state. At this time, the position of the lower bracket 3000 is unchanged, the first unlocking piece 4 and the first push rod connector 6 are located on the right side of the frame, the second unlocking piece 5 and the second push rod connector 7 are located on the left side of the frame, the second pushing part 51 falls into the second groove 72, the second unlocking piece 5 moves leftwards integrally, the top end of the second pushing part 51 abuts against the second groove bottom 72a, and the second reversing locking tooth 541 is inserted into the first locking groove 321; while the first pushing portion 41 is still located outside the first groove 62, the first reversal locking tooth 441 is correspondingly inserted into the second locking groove 322, and the locking member 3 is again simultaneously locked with the first locking structure 11 and the second locking structure 21.

When the stroller needs to be switched from the reverse pushing state to the forward pushing state, the above steps are operated in the reverse direction, which is not described herein again.

In this embodiment, the stroller can be folded only in a forward-pushing state, and when the stroller is folded, the push handle rod locking mechanism is unlocked first, then the push handle rod 1000 is driven to be folded backwards around the second rotation center line Y and folded with the rear wheel bracket 600 in a rotating manner, and the rear wheel bracket 600 and the front wheel bracket 500 are rotated and folded around the third rotation center line Z by continuing to rotate, and meanwhile, the connecting rod 700 and the stay rod 800 are both rotated upwards and folded between the front wheel bracket 500 and the rear wheel bracket 600, the upper push rod and the lower push rod of the push handle rod 1000 are rotated and folded, and the seat 300 can also be rotated and folded, so that the structure of the folded rod members is compact, the size of the stroller frame is greatly reduced, and the stroller frame is convenient to store and transport.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (10)

1. A children's shallow, includes the frame that has expansion state and fold condition, its characterized in that: in the deployed state, the frame comprises:

a handle pushing rod;

the lower end part of the push handle rod is rotatably connected with the upper bracket through a rotating shaft, the upper bracket comprises an upper connecting piece and a seat arranged on the upper connecting piece, the upper connecting piece comprises an upper rotating table, and the upper rotating table is provided with a first rotating plane which is arranged downwards;

the lower support is provided with a wheel assembly at the bottom and comprises a lower rotary table, the lower rotary table is provided with a second rotary plane which is arranged upwards, the first rotary plane and the second rotary plane are mutually attached, and the upper rotary table is rotatably connected with the lower rotary table through a central shaft;

wherein, the axis of the rotating shaft extends along the left and right direction of the frame, the axis of the central shaft extends along the height direction of the frame, and the horizontal plane where the axis of the rotating shaft is located is intersected with the entity of the central shaft;

the child stroller further comprises a locking mechanism used for locking the upper support relative to the lower support and an unlocking mechanism used for unlocking the locking mechanism, and the locking mechanism is arranged between the upper rotating table and the lower rotating table.

2. The stroller of claim 1, wherein: the locking mechanism comprises a first locking structure, a second locking structure and a locking piece, one of the first locking structure and the second locking structure is arranged on the upper rotary table, the other one of the first locking structure and the second locking structure is arranged on the lower rotary table, the locking piece can be arranged between the first locking structure and the second locking structure in a sliding mode along the up-down direction, the locking mechanism further comprises a first elastic piece used for providing acting force required by the locking piece to move towards the first locking structure,

if the locking mechanism is in a locking state, the locking piece is matched and connected with the first locking structure and the second locking structure simultaneously;

and if the locking mechanism is in an unlocked state, the locking piece is separated from the first locking structure in a matched locking mode.

3. The stroller of claim 2, wherein: the outer side peripheral wall of the locking piece is provided with a plurality of locking teeth arranged at intervals, and the first locking structure and the second locking structure are locking tooth grooves matched with the locking piece.

4. The stroller of claim 2, wherein: the unlocking mechanism comprises an unlocking piece, the unlocking piece is arranged between the lower end part of the push handle rod and the locking piece, and the unlocking piece is used for driving the locking piece to move away from the first locking structure so as to enable the locking piece to be separated from the first locking structure to be locked in a matched mode;

a first unlocking mechanism used for enabling the unlocking piece to move away from the push handle rod is arranged between the lower end part of the push handle rod and the unlocking piece, and a second unlocking mechanism used for enabling the locking piece to move away from the first locking mechanism is arranged between the unlocking piece and the locking piece;

if the unlocking piece moves away from the push handle rod by the first unlocking mechanism, the locking piece moves away from the first locking structure by the second unlocking mechanism;

if the unlocking piece moves towards the push handle rod, the locking piece moves towards the first locking structure under the action force of the first elastic piece.

5. The stroller of claim 4, wherein: the second unlocking mechanism comprises a reversing lock tooth and a reversing lock groove, the reversing lock tooth is fixedly arranged on the unlocking piece, the reversing lock groove is arranged on the locking piece,

if the locking mechanism is in a locking state, the reversing lock tooth is inserted in the reversing lock groove;

if the locking mechanism is in an unlocked state, the reversing lock teeth are disengaged from the reversing lock grooves, and at least one reversing lock tooth abuts against the locking piece to enable the locking piece to be disengaged and locked with the first locking structure.

6. The stroller of claim 2, wherein: the child stroller has a forward pushing state in which the seat faces back to the push handle bar and a backward pushing state in which the seat faces the push handle bar,

the unlocking mechanism comprises an unlocking piece, the unlocking piece is arranged between the lower end part of the push handle rod and the locking piece, the unlocking piece is provided with a first unlocking piece and a second unlocking piece which are respectively arranged on the left side and the right side, the first unlocking piece is provided with a first reversing locking tooth, and the second unlocking piece is provided with a second reversing locking tooth;

the locking piece is provided with a reversing lock groove matched with the first reversing lock tooth or the second reversing lock tooth, and the reversing lock groove is provided with a first lock groove and a second lock groove;

if the child stroller is in the forward pushing state and the locking mechanism is in the locking state, the first reversing lock tooth is inserted into the first lock groove, and the second reversing lock tooth is inserted into the second lock groove;

if the child stroller is in the reverse pushing state and the locking mechanism is in the locking state, the first reversing lock tooth is inserted into the second lock groove, and the second reversing lock tooth is inserted into the first lock groove;

and if the locking mechanism is in an unlocking state, the first reversing lock tooth and the second reversing lock tooth are disengaged from any reversing lock groove for locking.

7. The stroller of claim 6, wherein: the inner wall of the first lock groove on the left side or the right side is an inclined wall, the inclined wall extends obliquely from bottom to top, and the first reversing lock tooth and the second reversing lock tooth are provided with inclined planes matched with the inclined wall.

8. The stroller of claim 2, wherein: the child stroller has a forward pushing state in which the seat faces back to the push handle bar and a backward pushing state in which the seat faces the push handle bar,

the unlocking mechanism comprises an unlocking piece, the unlocking piece is arranged between the lower end part of the push handle rod and the locking piece, the unlocking piece is provided with a first unlocking piece and a second unlocking piece which are respectively arranged on the left side and the right side, the first unlocking piece is provided with a first pushing part, and the second unlocking piece is provided with a second pushing part;

the lower end part of the push handle rod is provided with a push groove, the push groove is provided with a first groove which is positioned at the same side as the first pushing part and a second groove which is positioned at the same side as the second pushing part, the first groove and the second groove are arranged in a left-right asymmetrical manner, the unlocking mechanism also comprises a second elastic piece which is used for providing acting force required by the movement of the push handle rod towards the corresponding side of the first pushing part or the second pushing part,

if the child stroller is in the forward pushing state and the locking mechanism is in the locking state, the first pushing part is at least partially positioned in the first groove, and the second pushing part is separated from the second groove;

if the child stroller is in the reverse pushing state and the locking mechanism is in the locking state, the first pushing part is separated from the first groove, and the second pushing part is at least partially positioned in the second groove;

if the locking mechanism is in an unlocking state, the first pushing part is separated from the first groove, and the second pushing part is separated from the second groove.

9. The stroller of claim 8, wherein: the pushing groove is provided with a groove bottom and notches positioned on two sides of the groove bottom, and two transition sections which obliquely extend from the groove bottom to the notches on two sides;

if the locking mechanism is in a locking state, the top end of the first pushing part or the second pushing part abuts against the groove bottom.

10. Child stroller according to any of claims 1 to 9, characterized in that: the lower carriage is including dividing two sets of collateral branch framves of locating the left and right sides, connecting both sides the horizontal stand between the collateral branch frame, the revolving stage sets firmly down on the horizontal stand, under the expansion state, every group the collateral branch frame includes:

the wheel assembly comprises a front wheel assembly arranged at the bottom of the front wheel bracket;

the wheel assembly comprises a rear wheel assembly arranged at the bottom of the rear wheel bracket, and the upper end part of the rear wheel bracket is rotationally connected with the upper end part of the front wheel bracket;

one end of the connecting rod is rotatably connected with the front wheel bracket;

one end of the support rod is rotatably connected with the connecting rod, and the other end of the support rod is rotatably connected with the rear wheel support.

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