CN212921664U

CN212921664U - Child stroller capable of being folded and reversed in situ

Info

Publication number: CN212921664U
Application number: CN202020901914.6U
Authority: CN
Inventors: 夏铁军; 马聪泉; 赵国松
Original assignee: Shaoxing Shangyu Rixing Hardware Products Co Ltd
Current assignee: Shaoxing Shangyu Rixing Hardware Products Co Ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-04-09
Anticipated expiration: 2030-05-25

Abstract

The application provides a but folding and switching-over children's shallow of normal position, including frame and rotatable seat, the seat including be located the roating seat of bottom with set up in folding support on the roating seat, folding support includes symmetrical arrangement's two side frames, and each side frame includes: the lower end of the front seat rod is hinged with the front side of the rotating seat; the lower end of the backseat rod is hinged with the rear side of the rotating seat; one end of the first connecting rod is hinged with the middle part of the front seat rod, and the other end of the first connecting rod is hinged with the upper end of the rear seat rod; the lower end of the handle rod is hinged with the upper end of the front seat rod; one end of the second connecting rod is hinged with the upper end of the backseat rod, and the other end of the second connecting rod is hinged with the lower end of the handle rod. This application children's shallow's seat can be on the adaptation seat you pivot to transform the orientation of seat, the seat can fold up alone in addition, need not to lift the seat alone and operates convenient to use.

Description

Child stroller capable of being folded and reversed in situ

Technical Field

The application relates to the field of children products, in particular to a child stroller with a seat capable of being reversed, folded and reversed in situ.

Background

For example, CN102219026A discloses a baby seat with adjustable rotation angle, which comprises a plug device disposed at the bottom of the seat body, a seat base and a driving device disposed therebetween, wherein the plug device can be lifted and lowered by the driving device to separate and combine with the seat base. After seat body and seat base break away from, the seat body can rotate, and when rotating to the position that needs, the seat body descends, and then combines with the seat base, but seat itself can not fold, leads to receiving the car back shallow bulky, inconvenient carrying.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application provides a children's cart capable of being folded and reversed in an in-situ reversing manner.

The child stroller with the seat capable of being rotated and folded comprises a frame and a rotatable seat, wherein the seat comprises a rotating seat positioned at the bottom, an adaptive seat matched with the rotating seat is arranged on the frame, and the rotating seat can rotate around a seat rotating axis relative to the adaptive seat, so that the seat has at least two working positions in different directions;

the seat including be located the roating seat of bottom with set up in folding support on the roating seat, folding support includes the both sides frame of symmetrical arrangement, and each side frame includes:

the lower end of the front seat rod is hinged with the front side of the rotating seat;

the lower end of the backseat rod is hinged with the rear side of the rotating seat;

one end of the first connecting rod is hinged with the middle part of the front seat rod, and the other end of the first connecting rod is hinged with the upper end of the rear seat rod;

the lower end of the handle rod is hinged with the upper end of the front seat rod;

one end of the second connecting rod is hinged with the upper end of the backseat rod, and the other end of the second connecting rod is hinged with the lower end of the handle rod;

the rotary seat, the front seat rod, the first connecting rod and the rear seat rod form a first connecting rod mechanism capable of deforming along with the folding support, and the front seat rod, the handle rod, the first connecting rod and the second connecting rod form a second connecting rod mechanism capable of deforming along with the folding support.

Optionally, the first connecting rod, the upper end of the recoil rod and the second connecting rod are coaxially hinged; the handle rod is provided with an extending part extending towards the direction of the front seat rod, the second connecting rod is hinged with the handle rod through the extending part, and the extending part is attached to the front seat rod when the folding support is in an unfolded state.

Optionally, when the folding bracket is in a folded state, the handle bar and the rear seat bar respectively abut against two sides of the front seat bar.

Optionally, an upper joint seat is arranged at the bottom of the handle rod, a lower joint seat is arranged at the top of the front seat rod, and the upper joint seat and the lower joint seat are mutually buckled by taking a first rotation axis as a rotation center to form a rotation joint; and a first locking mechanism for restricting the upper joint seat and the lower joint seat to rotate relatively is arranged in the rotating joint.

Optionally, the extension path of the second connecting rod is a curve, the folding bracket is in a folded state, and the second connecting rod is attached to the outer peripheral surface of the rotary joint.

Optionally, the first locking mechanism comprises:

a locking member movable along the first axis of rotation having a locked position engaging the upper joint mount and the lower joint mount and an unlocked position disengaged from one of them;

a driving member movable in a radial direction of the first rotation axis to drive the locking member to the unlocking position by a driving slope;

and a reset piece arranged between the locking piece and one of the upper joint seat and the lower joint seat, and used for keeping the locking piece at the locking position.

Optionally, the locking element comprises a cylindrical body and a plurality of locking lugs projecting radially with respect to the body, and locking grooves of complementary shape to the locking lugs are provided on the inner surfaces of the upper joint seat and the lower joint seat, adjacent locking lugs being of non-uniform size or shape.

Optionally, one of the upper joint seat and the lower joint seat is provided with a chute for mounting the driving member, and the inner wall of the chute facing the locking member is provided with the driving inclined plane.

Optionally, the reset member is a pressure spring, and is pressed between the locking member and one of the upper joint seat and the lower joint seat.

Optionally, the frame includes two side frames, the adaptation seat is settled between two side frame supports, the side frame includes front foot pole, back foot pole and handle pole, the wheel is installed to front foot pole and the bottom of back foot pole, and the top is rotated and is connected.

This application children's shallow's seat can be on the adaptation seat you original place rotate to the orientation of transform seat, the different use needs of adaptation, the seat can fold up alone in addition, and does not take place to interfere with the frame is folding, need not to lift the seat alone and operates convenient to use.

Drawings

FIGS. 1 a-1 j are schematic views of a stroller according to an embodiment;

fig. 2a to 2g are schematic views of a stroller according to another embodiment;

FIGS. 3a to 3g are schematic views illustrating the installation of a stroller according to another embodiment;

fig. 4a to 4d are schematic views of a stroller according to still another embodiment.

The reference numerals in the figures are illustrated as follows:

1. a frame; 11. an adapter base; 111. a positioning area; 112. a partition plate; 113. a lock hole; 114. a bottom mounting plate; 115. an operation port; 116. a guide pin;

2. a seat; 21. a rotating base; 211. rotating the disc; 22. folding the bracket; 221. a side frame; 222. a front seat post; 2221. a lower joint seat; 223. a recoil rod; 224. a first link; 225. a handle bar; 2251. an extension; 2252. an upper joint seat; 2253. a handle; 226. a second link; 227. a revolute joint; 2271. a swing rod seat; 2272. a central pivot; 23. a leg rest; 231. a drive shaft; 232. a shaft sleeve; 233. a ratchet; 234. a pawl; 235. a drive handle;

3. a first locking mechanism; 31. a locking member; 311. a drive ramp; 312. a locking projection; 313. a locking groove; 314. a chute; 32. a drive member; 33. a reset member;

4. a second locking mechanism; 41. positioning holes; 42. a movable pin; 421. a pin head; 422. a pulling part; 43. a traction groove; 431. an anti-drop sheet; 44. a restoring elastic member; 45. mounting grooves;

5. a third locking mechanism; 51. a fastening part; 511. a flange; 52. a clamping block; 521. a protrusion; 522. a snap head; 523. a guide ramp; 524. a stop surface; 53. unlocking the lock; 531. an operation section; 532. a linkage arm; 533. a guide inclined hole; 534. a guide bar hole; 54. a holder;

6. a safety handrail; 61. a connecting portion; 611. a first limit step; 612. a first slot; 62. a grip portion; 621. a second limit step; 622. a second slot; 63. a support sleeve; 64. a tension member; 65. a first fastener; 66. a second fastener; 661. and (7) installing holes.

Detailed Description

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

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

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

In the art, the rod is made of a pipe for reducing weight or building a pipeline, but the core purpose of the rod is to transmit torque and support the relationship of the frame 1, so that the rod in the present disclosure can have various implementation forms, and components such as a hollow pipe and the like capable of supporting multidirectional torque so as to resist tension, compression and bending are facilitated.

Meanwhile, the hinge, the rotational connection, and the like mentioned in the present application are realized by means of a common technical means in the art without being particularly described, for example, the components are stacked in sequence in the axial direction at the position of the pivot shaft and are rotationally matched by the pivot shaft, and the pivot shaft may be a separate component or may be an integral structure with one of the components.

The anteroposterior relationship described in the present application refers to the anteroposterior relationship when the stroller is pushed forward, and is not limited to the anteroposterior relationship in the absolute direction, and in the case of the swivel seat 2 provided in the present application, the anteroposterior relationship is a concept when the seat 2 is pushed forward. For example, when the seat 2 is forward, the front seat lever 222 is positioned on the front side of the rear seat lever 223, and when the seat 2 is backward, the front seat lever 222 is positioned on the rear side of the rear seat lever 223; for example, when the user stands behind the stroller with the seat 2 facing forward, and pulls the stroller to move backward, the front seat bar 222 is located at the rear side of the rear seat bar 223 in the traveling direction.

Referring to fig. 1a to 1j, a stroller comprises a frame 1 and a rotatable seat 2, wherein the seat 2 comprises a rotary seat 21 at the bottom, the frame 1 is provided with an adapter 11 engaged with the rotary seat 21, the rotary seat 21 can rotate around a seat rotation axis relative to the adapter 11, as shown in fig. 1b and 1c, by rotating the seat 2, the orientation of the seat 2 can be changed to meet different requirements.

The frame 1 comprises two symmetrically arranged side frames, between which an adapter 11 is arranged. The single side frame comprises a front foot rod, a rear foot rod and a handle rod, the tops of the front foot rod and the rear foot rod are rotatably connected, wheels are mounted at the bottoms of the front foot rod and the rear foot rod, the front wheels are universal wheels and are convenient for the cart to turn, the rear wheels are directional wheels, and connecting shafts are arranged between the rear wheels. The top parts of the two handle rods are bent inwards to be connected into a whole to form a U-shaped rod piece.

In one embodiment, as shown in fig. 1a, the bottom of the handle bar is inserted into the middle of the rear foot bar, the joint is provided with a locking mechanism, the handle bar is arranged between the handle bar and the bottom of the rear foot bar, and the linkage bar is arranged between the bottom of the handle bar and the top of the front foot bar. It can be seen that the plane in which the side frames lie does not interfere with the seat, so that the frame and seat can be folded together.

In the embodiment, the front part of the adaptive seat is coaxially hinged with the grab bar, the front foot bar and the rear foot bar, the rear part of the adaptive seat is hinged with the handle bar, and when the adaptive seat is unlocked and folded, the adaptive seat can be closed to the plane where the rear foot bar is located, so that the size of the trolley is reduced. Obviously, as long as the frame does not interfere with the seat, the side frame structure can adopt any existing structure, and the installation mode of the corresponding adapting seat 11 can also be adaptively changed.

For convenience of carrying, as shown in fig. 1f, the seat 2 and the frame 1 are often foldable in situ, and in one embodiment, as shown in fig. 1d, the seat 2 includes a rotary seat 21 at the bottom and a foldable bracket 22 disposed on the rotary seat 21, the rotary seat 21 is rotatably fitted to the frame 1 of the stroller, the foldable bracket 22 includes two symmetrically arranged side frames 221, and each side frame 221 includes:

a front seat rod 222, the lower end of which is hinged with the front side of the rotary seat 21;

a backseat lever 223 with the lower end hinged with the rear side of the rotary seat 21;

a first link 224 having one end hinged to the middle of the front seat link 222 and the other end hinged to the upper end of the rear seat link 223;

a handle bar 225, the lower end of which is hinged with the upper end of the front seat bar 222;

a second link 226 having one end hinged to the upper end of the recoil rod 223 and the other end hinged to the lower end of the handle bar 225;

the rotary seat 21, the front seat lever 222, the first link 224, and the rear seat lever 223 constitute a first link mechanism that can be deformed with the folding bracket 22, and the front seat lever 222, the handle lever 225, the first link 224, and the second link 226 constitute a second link mechanism that can be deformed with the folding bracket 22.

The first link mechanism and the second link mechanism structurally share the first link 224 and the front seat lever 222, so that the spatial configuration change of the first link mechanism is synchronized to the second link mechanism, thereby achieving the folding and unfolding of the seat 2. The front seat rod 222 and the rear seat rod 223 need to be eccentrically hinged when being hinged with the rotary seat 21, namely, a first hinge point and a second hinge point are arranged at different positions on a single side edge of the rotary seat 21, the lower end of the front seat rod 222 is hinged with the first hinge point, and the lower end of the rear seat rod 223 is hinged with the second hinge point.

The rotary seat 21 is used for realizing the front and back rotation of the seat 2 relative to the frame 1, and the folding bracket 22 is used as a framework and is mainly used for supporting a cloth cover and a sunshade, and has two states of folding and unfolding. It has been found that the entire seat is located in the space between the two side frames of the frame and therefore the structure of the frame does not affect the collapsing of the folding legs and vice versa.

In one embodiment, as shown in fig. 1d, the first link 224, the upper end of the recoil rod 223 and the second link 226 are coaxially hinged; the handle bar 225 is provided with an extension 2251 extending in the direction of the sit-forward bar 222, and the second link 226 is hinged to the handle bar 225 through the extension 2251.

Since the two link mechanisms share the first link 224, the first link 224 comes into a connected relationship with two components, and in the present embodiment, a coaxial hinge is adopted for the sake of simplification of the structure and ease of assembly. The arrangement order of the specific components can be adjusted according to the folding requirements of the folding bracket 22.

The extension 2251 is actually part of the handle bar 225, and in order to avoid pinching, in one embodiment, the extension 2251 abuts the seatpost 222 when the folding bracket 22 is in the unfolded state.

In the cooperative relationship of the members, in one embodiment, the folding bracket 22 is in the folded state, and the handle bar 225 and the recoil bar 223 are respectively abutted against both sides of the recoil bar 222.

The folding state of the above form can obtain more regular folding performance, and is convenient for users to use under different conditions.

The hinging between the rod pieces can be realized by a simple rotating shaft or by arranging a rotating joint. In one embodiment, as shown in fig. 1h, 1i and 1j, the bottom of the handle bar 225 is provided with an upper joint seat 2252, the top of the front seat bar 222 is provided with a lower joint seat 2221, and the upper joint seat 2252 and the lower joint seat 2221 are engaged with each other with the first rotation axis as the rotation center to form a rotation joint 227; the rotary joint 227 is internally provided with a first locking mechanism 3 for restricting the mutual rotation of the two.

In this embodiment, the revolute joint 227 enables articulation of the support bar and the forefoot bar. The advantage of the articulated seat is that it is possible to avoid the occurrence of grip gaps, while more components, such as the first locking mechanism 3, can be accommodated. In order to avoid the influence of the bulky joint seat on the motion relationship of the rod, as shown in fig. 1g, in an embodiment, the extending path of the second link 226 is curved, and the folding bracket 22 is in the folded state, and the second link 226 fits the outer peripheral surface of the rotating joint 227. The provision of the second link 226 as an arcuate bar also provides some assistance in the folding effect of the folding bracket 22, which may result in a more orderly folded appearance.

The revolute joint 227 can be provided with a member outside in addition to housing the internal member. Such as a swing link seat 2271 for mounting a roof swing link. In one embodiment, the pivot joint 227 is further hinged to a roof swing link (not shown) that can swing relative to the handle bar 225 to open or close the roof.

The maintenance of the unfolded and folded state of the folding bracket 22 is achieved by the first locking mechanism 3. In one embodiment, as shown in fig. 1i and 1j, the first locking mechanism 3 comprises:

a locking member 31 moving on a first rotation axis, having a locking position engaging with the upper joint seat 2252 and the lower joint seat 2221 and a releasing position separated from one of them;

a driving member 32 moving in the radial direction of the first rotation axis to drive the locking member 31 to the unlocking position by the driving slope 311;

and a restoring member 33 provided between one of the upper joint seat 2252 and the lower joint seat 2221 and the locking member 31, for maintaining the locking member 31 at the locking position.

When the locking member 31 is in the locking position, the locking member 31 is engaged with the upper joint seat 2252 and the lower joint seat 2221 at the same time, so that the mutual rotation of the upper joint seat 2252 and the lower joint seat 2221 is restricted, thereby determining the spatial state of the folding bracket 22. When the driving force applied by the driving member 32 to the locking member 31 through the driving inclined surface 311 is greater than the force applied by the reset member 33, the locking member 31 moves along the first rotation axis to be separated from one of the two, and at this time, the mutual rotation of the upper joint seat 2252 and the lower joint seat 2221 can be released, and the folding bracket 22 can move spatially.

It will thus be seen that the locking effect of the first locking mechanism 3 is primarily dependent on the engagement effect of the locking member 31 with the upper 2252 and lower 2221 joint seats. In one embodiment, the locking member 31 includes a circumferential body and a plurality of locking tabs 312 projecting radially from the body, and the upper 2252 and lower 2221 joint seats have locking slots 313 on their inner surfaces that are complementary in shape to the locking tabs 312, with adjacent locking tabs 312 being non-uniform in size or shape.

The increase in the number of locking tabs 312 provides more locking positions and thus more variability in the spatial position of the folding bracket 22. However, the user does not actually need so many spatial states of the folding bracket 22 during the use process, so the provision of the locking projections 312 with different shapes can provide the user with several folding brackets 22 in certain states, and the larger volume of the locking projections 312 can also bear larger torque, thereby improving the locking effect and the stability of the seat 2.

In the installation of the locking member 31, in an embodiment, as shown in fig. 1i, one of the upper joint seat 2252 and the lower joint seat 2221 is provided with a sliding groove 314 for installing the driving member 32, and the inner wall of the sliding groove 314 facing the locking member 31 is provided with a driving inclined surface 311.

The driving bevel 311 can be disposed on the driving member 32 to drive the locking member 31 to move alone, or disposed in the sliding groove 314 with reference to the embodiment. In this embodiment, the slide groove 314 and the driving member 32 are provided with driving slopes 311, which move with each other to push the driving member 32 and the locking member 31 to move together along the first rotation axis. The slide groove 314 in fact provides a limit to the movement of the driving member 32, so as to increase the stability of the movement of the driving member 32, and in the solution shown in the figures, the driving member 32 is arranged around the central pivot 2272 of the first abutment, also in order to increase the stability of the movement of the driving member 32. In the driving mode, the driving member 32 can expose the rotary joint 227, and can be directly driven by a user through manual operation, and a pull rope can be arranged to be convenient to operate. Such as the handle 2253 position shown formed by the connection of the support poles of the two side frames 221.

In the arrangement of the reset element 33, as shown in fig. 1i and 1j, in an embodiment, the reset element 33 is a compression spring, and is pressed between one of the upper joint seat 2252 and the lower joint seat 2221 and the locking element 31. The return element 33 is arranged around the central pivot 2272 of the first abutment in the solution shown in the figures, which improves the stability of the movement of the return element 33.

Referring to fig. 2a to 2g of the drawings, a stroller, includes frame 1 and rotatable seat 2, and seat 2 includes roating seat 21 that is located the bottom, is equipped with on the frame 1 of stroller with roating seat 21 with seat 2 axis of rotation complex adaptation seat 11, is equipped with the second locking mechanical system 4 of restriction adaptation seat 11 and roating seat 21 mutual rotation on the adaptation seat 11, and second locking mechanical system 4 includes:

at least two positioning holes 41 arranged on the adapting seat 11;

a movable pin 42 provided on the rotary base 21, the movable pin 42 having an avoidance position retracted into the rotary base 21 and a working position extended out of the rotary base 21, the movable pin 42 engaging with the positioning hole 41 when the seat 2 is at the predetermined position;

a traction cable (not shown) has one end coupled to the movable pin 42 and the other end coupled to a component on the seat 2 or the frame 1.

When the movable pin 42 is in the operating position, the stroke of the relative rotation of the rotary seat 21 and the adapter 11 is limited, so that the seat 2 cannot rotate relative to the adapter 11, and when the pull rope pulls the movable pin 42 into the avoidance position, the stroke of the relative rotation of the rotary seat 21 and the adapter 11 is released, so that the seat 2 can rotate relative to the adapter 11. The seat 2 can be locked in any state relative to the fitting seat 11, and the position of the positioning hole 41 is specifically set. When the positioning hole 41 is provided in plural, the seat 2 can be locked in plural states with respect to the fitting seat 11.

It will be appreciated that the stabilising action of the moveable pin 42 requires stabilising action of the pull cable and in one embodiment, as shown in figure 2a, the swivel base 21 is provided with a pull groove 43 for guiding the pull cable, the pull groove 43 being cut into the surface of the swivel base 21.

The traction groove 43 can guide the traction cable to move in a preset direction. The traction groove 43 formed on the surface of the rotary seat 21 has the advantages of simple processing and convenient assembly. But correspondingly, is susceptible to external influences. Therefore, in one embodiment, as shown in fig. 2b, the opening of the traction groove 43 is provided with anti-slip sheets 431 for preventing the traction rope from falling off the traction groove 43, the anti-slip sheets 431 are arranged at two ends of the opening of the traction groove 43 in pairs, and each pair of anti-slip sheets 431 is arranged in a staggered manner. The anti-slip sheets 431 arranged in a staggered way can cover a larger area of the opening of the traction groove 43, so that the traction rope is limited to slip out of the traction groove 43.

In the description of the operation of the movable pin 42, it is easy to see that the movable pin 42 is subjected to a force from a radial direction, and thus the movable pin 42 may be stuck. In one embodiment, the traction cable is arranged in pairs to act on both ends of the movable pin 42, respectively, and the movable pin 42 is further provided with a return elastic member 44, the return elastic member 44 being disposed between both ends of the movable pin 42 connected to the traction cable. The arrangement of the present embodiment can effectively improve the stability of the movable pin 42.

In a specific structure of the movable pin 42, in an embodiment, as shown in fig. 2d, 2f, and 2g, one end of the movable pin 42 is a pin head 421 engaged with the positioning hole 41, the other end is a pulling part 422 engaged with the pulling cable, the pulling part 422 is U-shaped, two ends of the opening are respectively connected with the pulling cable, and the restoring elastic member 44 is disposed in the opening of the pulling part 422. This configuration allows the external environment to be prevented from affecting the return spring 44.

Further, in an embodiment, as shown in fig. 2e, the rotary base 21 is provided with a mounting groove 45 for guiding the movement of the movable pin 42, the mounting groove 45 surrounds the movable pin 42 to guide the movement path thereof, and the pulling part 422 and the restoring elastic member 44 are received in the mounting groove 45.

The mounting groove 45 not only restrains the movable pin 42 but also seals the traction cable and the return elastic member 44, thereby further improving the stability of the movable pin 42.

The source of the traction cable can be realized by a component on the frame 1, and in one embodiment, as shown in fig. 2a, a leg support 23 is rotatably mounted on the rotary base 21, the traction cable is linked with the leg support 23, and the leg support 23 rotates relative to the rotary base 21 to drive the movable pin 42 to the avoidance position.

In one embodiment, the leg support 23 is hinged to the front end of the rotary base 21 by a driving shaft 231, a pulling cable is wound around the driving shaft 231, and the driving shaft 231 pulls the pulling cable during rotation.

In the rotation process of the seat 2, the leg support 23 is a component which must be operated, and the triggering action of the traction cable is linked with the storage process of the leg support 23, so that great convenience is brought to users, and the use experience is improved.

In the method of operation of the leg rest 23, in one embodiment, the leg rest 23 has a use position facing downward relative to the swivel base 21 and an activation position facing upward relative to the swivel base 21, and the leg rest 23 pulls the pull cable to actuate the activating pin 42 during movement from the use position to the activation position. The process of triggering the traction cable by the leg rest 23 is not only the process of retracting the leg rest 23 before rotating the seat 2, but more importantly, the process of antigravity, so that the accidental unlocking of the second locking mechanism 4 can be effectively avoided by the arrangement of the embodiment.

In order to further limit the free movement of the leg rest 23, in an embodiment, a sleeve 232 is provided at the front end of the rotary base 21 for engaging with the driving shaft 231, a ratchet 233 is provided on the sleeve 232, a pawl 234 for engaging with the ratchet 233 is provided on the leg rest 23, and the pawl 234 is slidably mounted on the leg rest 23.

As can be readily seen in the arrangement shown in figure 2e, the pawl 234 is also provided with a corresponding actuating handle 235 mounted on the lower edge of the leg rest 23 for easy manipulation by the user.

Referring to fig. 3a to 3g, a stroller comprises a frame 1 and a rotatable seat 2, the seat 2 includes a rotary seat 21 at the bottom, an adapter 11 engaged with the rotary seat 21 along the rotation axis of the seat 2 is disposed on the frame 1 of the stroller, and a third locking mechanism 5 for limiting the separation of the rotary seat 21 from the adapter 11 is disposed between the adapter 11 and the rotary seat 21. The third lock mechanism 5 includes:

an engaging portion 51 provided on the rotary base 21;

a plurality of engaging pieces 52 provided on the adapter 11 and moving in the radial direction of the rotation axis of the seat 2, each engaging piece 52 having an engaging position capable of engaging with the engaging portion 51 and a releasing position to withdraw from the engaging portion 51;

an unlocking member 53 slidably mounted on the adapter 11 and synchronously driving each engaging member 52 to an unlocking position through a guide inclined hole 533 thereof;

and a holder 54 provided between the rotary base 21 and the engagement block 52 for holding the engagement block 52 at the engagement position.

The third locking mechanism 5 practically limits the relative positions of the adapter 11 and the swivel 21 on the axis of rotation of the seat 2. The rotary base 21 is intended to rotate and should in principle have a circumferential outer edge for cooperation with the adapter 11. The engaging blocks 52 actually form an equivalent limiting ring with variable size, and when the engaging blocks 52 are located at the engaging position, the inner diameter of the equivalent limiting ring is smaller than the outer diameter of the engaging portion 51, so as to lock the engaging blocks and the engaging portion.

In one embodiment, as shown in fig. 3e, the bottom of the rotary base 21 is provided with a rotating disc 211, and the rotating disc 211 is expanded toward one end of the adapting base 11 to form the engaging portion 51.

The rotating plate 211 may be a separate component as shown in the drawings, or may be provided as an integral structure with the rotating base 21. In order to achieve a good clamping effect, the side of the clamping portion 51 facing away from the positioning region 111 should be as flat as possible in principle, and even a flange 511 may be provided at the edge as shown in fig. 3g to prevent clamping failure, and correspondingly, the clamping block 52 in the drawing is also provided with a downward projection 521 to enhance the clamping effect.

For convenience of positioning and installation, in an embodiment, the adapter 11 is recessed to form a positioning area 111, the positioning area 111 is used for accommodating at least a part of the rotary seat 21, the plurality of engaging blocks 52 are arranged around the positioning area 111, and the engaging blocks 52 in the engaging position extend into the positioning area 111.

The positioning region 111 may be provided as a tapered region as shown in the drawings, thereby facilitating alignment and installation, and the positioning region 111 may also have a functional isolation effect. In one embodiment, as shown in fig. 3a, the adapter 11 has a partition 112 separating the positioning region 111 from other parts, and the partition 112 has a locking hole 113, and the locking hole 113 is used to allow the engaging head 522 to enter the positioning region 111. The partition 112 can provide a more regular appearance, and more importantly, the positioning area 111 is open and is more susceptible to the external environment, and the partition 112 can prevent the components and the foreign objects and the components from interfering with each other.

In one embodiment of the engaging block 52, as shown in fig. 3g, the engaging block 52 is an engaging head 522 located in the positioning region 111, a guiding inclined surface 523 is provided on a side of the engaging head 522 facing the engaging portion 51, the guiding inclined surface 523 is used for driving the engaging portion 51 to enter the unlocking position, and the engaging head 522 faces away from the engaging portion 51 to a stopping surface 524.

The provision of the guide slope 523 allows the seat 2 to be naturally loaded during installation, avoiding an awkward situation in which the user operates the unlocking member 53 while operating the seat 2. The projection 521 of the snap-fit head 522 mentioned above is also provided on the outer edge of the stop surface 524.

In the motion relationship of the unlocking piece 53, in an embodiment, the unlocking piece 53 is disposed on the back of the adapting seat 11 and surrounds the positioning area 111, and an included angle exists between the motion direction of the engaging block 52 and the sliding direction of the unlocking piece 53.

The motion of the unlocking piece 53 needs to be ensured to be stable so as not to be triggered accidentally, and therefore, the design of the included angle can ensure that the clamping block 52 does not interfere with the motion of the unlocking piece 53 when receiving the acting force of the rotating disk 211, and even if a single clamping block 52 fails, the situation of integral clamping failure cannot be caused.

In order to synchronize the movement of each engaging block 52, in one embodiment, as shown in fig. 3d and 3b, the unlocking piece 53 includes an operating part 531 for applying a driving force and an interlocking arm 532 extending to both sides of the positioning region 111, and a guide inclined hole 533 is provided on the interlocking arm 532.

Linkage arm 532 compares and all sets up the form into unlocking piece 53 in the bottom plate, can effectively reduce unlocking piece 53's volume and weight, improves and uses and feels, more can reduce the whole thickness of adaptation seat 11, makes things convenient for daily use.

In fact, in the solution shown in the drawings, the operation portion 531 itself is also provided with an engaging head 522 for engaging the inserting positioning area 111 with the engaging portion 51, because the operation portion 531 is consistent with the moving direction of the engaging head 522 in the moving direction, the engaging effect of the adapter 11 and the rotating disc 211 can be strengthened without adding components, and the structure is simple and effective.

In the installation of the unlocking member 53, as shown in fig. 3b and 3d, in an embodiment, the bottom of the adapter 11 is open to accommodate the unlocking member 53, the adapter 11 further includes a bottom mounting plate 114, the mounting plate and the adapter 11 surround to constrain the unlocking member 53, the bottom mounting plate 114 is provided with an operation opening 115, and the operation opening 115 is used for exposing the operation portion 531.

The bottom mounting plate 114 and the adapter 11 cooperate to form a relatively closed space, which protects the components from the external environment. After the unlocking member 53 is installed in place, the movement direction and the stroke of the unlocking member 53 also need to be limited to achieve stable driving of the engaging block 52, in an embodiment, as shown in fig. 3c, at least two guide pins 116 are arranged at the bottom of the adapting seat 11, a guide bar hole 534 matched with the guide pins 116 is arranged on the unlocking member 53, and the guide pins 116 and the guide bar hole 534 are matched to restrict the movement path of the unlocking member 53. Further, in an embodiment, the guide bar hole 534 is provided on the operating portion 531.

Referring to fig. 4a to 4d, a stroller comprises a frame 1 and a seat 2, wherein a safety handle 6 is disposed on the seat 2, as shown in fig. 4d, the safety handle 6 comprises a holding portion 62 and a connecting portion 61 connected to the frame 1 of the stroller, and further comprises a supporting sleeve 63 and a tensioning member 64, the supporting sleeve 63 is cylindrical, the holding portion 62 is inserted into the upper end of the supporting sleeve 63, and the connecting portion 61 is inserted into the lower end of the supporting sleeve 63; the tension member 64 is located inside the support sleeve 63 and tensions the grip portion 62 and the connecting portion 61 at both ends.

Compared with the integrated molding mode in the related art, the scheme in the embodiment has obvious advantages of cost and precision, and compared with the technical scheme of multi-section assembly, the scheme in the embodiment can wrap the first fastening piece through the supporting sleeve 63, so that good appearance and touch feeling are provided, and the strength is not influenced while the use feeling is ensured.

In terms of ensuring the mechanical performance, in an embodiment, the top of the connecting portion 61 is inserted into the supporting sleeve 63, and is provided with a first limiting step 611 abutting against the lower edge of the supporting sleeve 63, and the tightening member 64 is in force fit with the connecting portion 61 through a first fastening member 65.

Correspondingly, in an embodiment, the bottom of the holding portion 62 is inserted into the supporting sleeve 63, and a second limiting step 621 abutting against the upper edge and the lower edge of the supporting sleeve 63 is provided, and the tensioning member 64 is in force fit with the connecting portion 61 through a second fastening member 66. The upper and lower clamping can effectively ensure the stress performance.

In the installation of the fastening member, the fastening member can be installed in a fully closed manner by means of the engagement of both sides of the support sleeve 63, but accordingly, the strength of the support sleeve 63 is reduced. Thus, in one embodiment, the support sleeve 63 is provided with at least one mounting hole that is aligned with the first fastener and/or the second fastener. In a specific implementation manner, reference may be made to an embodiment in which the first fastening member 65 is closed at both ends by the supporting sleeves 63. This embodiment can install a fastener earlier in the installation, and the cover is established and is supported the cover again, and the minimum area that exposes of fastener is realized to the form of installing another fastener at last to can avoid the influence that technological defects such as burr brought when guaranteeing joint strength. Accordingly, in one embodiment, the supporting sleeve 63 is provided with a mounting hole 661 corresponding to the two ends of the second fastening member 66, and the length of the second fastening member 66 is slightly shorter than the maximum diameter of the supporting sleeve 63. The external performance is not influenced while the assembly is convenient.

Based on the top-bottom installation manner, in an embodiment, the top of the connecting portion 61 is provided with a first slot 612, and the tension member 64 extends into the first slot 612 to cooperate with the first fastening member 65. Accordingly, in one embodiment, the bottom of the grip portion 62 is provided with a second slot 622, and the tension member 64 extends into the second slot 622 to engage with the second fastening member 66. Mounting slots 45 additionally provide a torsional resistance, thereby providing a better mechanical performance for safety rail 6.

In order to secure the mounting strength of the fastening member, the axial direction of the first fastening member 65 is perpendicular to the extending direction of the first insertion groove 612. Accordingly, the second fastening member 66 has an axial direction perpendicular to the extending direction of the second insertion groove 622. Thereby strengthening the tensioning effect of the tensioning member.

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

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

Claims

1. The stroller capable of being folded and reversed in situ is characterized by comprising a frame and a rotatable seat, wherein the seat comprises a rotating seat positioned at the bottom, an adaptive seat matched with the rotating seat is arranged on the frame, and the rotating seat can rotate around a seat rotating axis relative to the adaptive seat, so that the seat has at least two working positions in different directions;

2. The stroller of claim 1, wherein the first link, the upper end of the recoil bar, and the second link are coaxially hinged; the handle rod is provided with an extending part extending towards the direction of the front seat rod, the second connecting rod is hinged with the handle rod through the extending part, and the extending part is attached to the front seat rod when the folding support is in an unfolded state.

3. The stroller of claim 1, wherein the folding bracket is in a folded position, and the handlebar and the rear seat post abut against two sides of the front seat post, respectively.

4. The stroller of claim 1, wherein the handle bar has an upper joint seat at the bottom thereof and a lower joint seat at the top thereof, and the upper joint seat and the lower joint seat are fastened to each other with a first rotation axis as a rotation center to form a rotation joint; and a first locking mechanism for restricting the upper joint seat and the lower joint seat to rotate relatively is arranged in the rotating joint.

5. The stroller of claim 4, wherein the extension path of the second link is curved, and the folding bracket is in the folded state, and the second link abuts against the outer peripheral surface of the pivot joint.

6. The stroller of claim 4, wherein the first locking mechanism comprises:

7. The stroller of claim 6, wherein the locking member comprises a cylindrical body and a plurality of locking lugs projecting radially relative to the body, and wherein locking grooves of complementary shape to the locking lugs are provided on the inner surfaces of the upper and lower joint seats, adjacent locking lugs being of non-uniform size or shape.

8. The stroller of claim 6, wherein one of the upper joint seat and the lower joint seat is provided with a sliding groove for mounting the driving member, and an inner wall of the sliding groove facing the locking member is provided with the driving slope.

9. The stroller of claim 6, wherein the return element is a compression spring biased between the locking element and one of the upper joint seat and the lower joint seat.

10. The stroller of claim 1, wherein the frame comprises two side frames, the adapter seat is disposed between the two side frame supports, the side frames comprise a front leg rod, a rear leg rod and a handle rod, wheels are mounted at the bottoms of the front leg rod and the rear leg rod, and the tops of the front leg rod and the rear leg rod are rotatably connected.