CN216140042U - Children's trailer - Google Patents

Abstract

The utility model discloses a children trailer, which comprises a frame and wheel components arranged at the bottom of the frame, wherein the frame comprises a front support and a rear support which are respectively arranged in the front and rear directions and extend along the up-down direction, and a support frame which is arranged between the front support and the rear support and extends along the front and rear directions; when the side door is in a closed state, the side door is positioned between the front support and the rear support along the front-back direction and positioned at the left side part or the right side part of the frame, and the side door extends along the up-down direction and at least partially exceeds the support frame. The child trailer provided by the utility model is provided with the side door capable of being opened and closed, a child can conveniently enter the trailer, and the child trailer occupies a small space after being folded, so that the child trailer is convenient to store and transport.

Description

Children's trailer

Technical Field

The utility model relates to a children trailer.

Background

The side wall on the existing perambulator usually adopts the fixed setting mode, and the child can get into the perambulator by crossing the side wall or by the assistance of parents when taking the perambulator, so the perambulator is very inconvenient. And, current perambulator is in order to reduce parking space so that accomodate and transport, is set up to folding for the most, and the folding mechanism of perambulator easily interferes with the side wall for the perambulator is folding incomplete. Accordingly, it is an endeavor of those skilled in the art to design and manufacture a child car that is easy to enter and occupies little space after being folded.

Disclosure of Invention

The utility model aims to provide a novel children trailer.

In order to achieve the purpose, the utility model adopts the technical scheme that: a children trailer comprises a frame and wheel components arranged at the bottom of the frame, wherein the frame comprises a front support and a rear support which are respectively arranged in the front and rear directions and extend along the up-down direction, a support frame which is arranged between the front support and the rear support and extends along the front and rear directions, the frame also comprises a side door which is movably arranged on at least one of the support frame, the front support and the rear support,

the side door is provided with an open state and a closed state, and when the side door is in the open state, a channel is formed between the front bracket and the rear bracket and is positioned above the supporting frame; work as the side door is in under the closed condition, the side door is located along the fore-and-aft direction the fore-stock with just be located between the after-poppet the left side portion or the right side portion of frame, the side door extends and at least part is higher than along upper and lower direction braced frame.

Preferably, the side doors are provided with a group, and the side doors are movably arranged on the front bracket or the rear bracket; alternatively, the first and second electrodes may be,

the side door has two sets ofly, and is a set of the side door sets up movably on the fore-stock and another group the side door is located movably on the after-poppet.

Furthermore, the front support is provided with a front support rod which is positioned on the side part and extends along the vertical direction, the side door is rotatably arranged on the front support rod around the axis line of the front support rod, and a front limiting structure used for limiting the range of the rotation angle of the side door is arranged between the front support rod and the side door; and/or the presence of a gas in the gas,

the after-poppet has the back branch that is located the lateral part and extends along upper and lower direction, the side door winds the axial lead of preceding branch sets up with rotating on the back branch, back branch with still be equipped with between the side door and be used for the restriction the back limit structure of side door turned angle scope.

Further, the side door around the rotation center line that vertical direction extends with the fore-stock and/or the after-poppet sets up with rotating, the side door with still be equipped with between the braced frame and be used for with the side door locking mechanism under the closed condition.

Further, the side door is entirely located above the support frame, and the side door locking mechanism is provided between a lower portion of the side door and an upper portion of the support frame.

Still further, side door locking mechanical system is including can following vertical direction slidable ground setting locking piece, setting on the side door are in on the braced frame with locking portion that the locking piece mutually supported, the locking piece has primary importance and second place on self sliding path, works as when the locking piece is in the primary importance, the locking piece with the locking portion cooperation makes side door locking mechanical system is in the locking state, works as when the locking piece is in the second place, the locking piece with the locking portion breaks away from the cooperation and makes side door locking mechanical system is in the unblock state, side door locking mechanical system still includes providing the locking piece by the primary importance to the required effort of second place motion first elastic component, and will the locking piece restriction is in spacing subassembly under the primary importance.

Furthermore, the limiting assembly comprises a limiting member, the limiting member is slidably disposed on the side door, the sliding direction of the limiting member is perpendicular to the sliding direction of the locking member, the limiting member is provided with a limiting hole through which the limiting member can slidably pass, the peripheral portion of the outer side of the locking member is provided with a limiting groove, and when the side door locking mechanism is in a locked state, part of the inner wall of the limiting hole is mutually clamped with the limiting groove; when side door locking mechanical system is in the unblock state, the inner wall in spacing hole with the spacing groove breaks away from the cooperation, the locking piece can certainly pass with sliding in the spacing hole, spacing subassembly is still including providing the second elastic component of the required effort of locating part along its slip direction motion.

Still further preferably, the locking member includes a cylindrical rod portion and a head portion located at the top of the cylindrical rod portion, the cylindrical rod portion is provided with a limiting retaining ring, the outer diameter of the limiting retaining ring is larger than the outer diameter of the cylindrical rod portion and the aperture of the limiting hole, the limiting groove is located on the cylindrical rod portion and located between the head portion and the limiting retaining ring, the limiting member includes a limiting piece and an operating head portion connected in the length direction, and the limiting hole is located on the limiting piece.

As a preferred embodiment, the side door includes a frame-shaped door frame body, and the lock seat is disposed on the door frame body, and the side door locking mechanism is disposed on the lock seat;

and/or the side door locking mechanism is arranged on the side door and is far away from the rotation center line of the side door;

and/or the side door is arranged on one side or two sides of the left side and the right side of the frame;

and/or, the side door forms a side enclosure on a side of the frame in the closed state;

and/or, braced frame can fold up along the fore-and-aft direction and set up, the frame has expansion state and fold condition, works as the frame is by the in-process that expansion state to fold condition conversion, the side door is prior to the fore-stock and/or the after-poppet rotates to draw in, braced frame folds up along the fore-and-aft direction the fore-stock with between the after-poppet.

In a preferred embodiment, the wheel assembly includes a front wheel assembly disposed at a bottom of the front bracket and a rear wheel assembly disposed at a bottom of the rear bracket, and the support frame includes:

the supporting frame extends along the vertical direction;

an upper chassis assembly including a first upper chassis and a second upper chassis extending in a front-rear direction, respectively, a front portion of the first upper chassis being rotatably connected to the front bracket, a rear portion of the second upper chassis being rotatably connected to the rear bracket, the rear portion of the first upper chassis, the front portion of the second upper chassis, and an upper portion of the support frame being rotatably connected around a same rotational axis;

a lower chassis assembly including a first lower chassis and a second lower chassis extending in a front-rear direction, respectively, a front portion of the first lower chassis being rotatably connected to the front bracket, a rear portion of the second lower chassis being rotatably connected to the rear bracket, the rear portion of the first lower chassis, the front portion of the second lower chassis, and a lower portion of the support frame being rotatably connected around a same rotational axis;

a front link having one end portion rotatably connected to one of the first upper chassis and the first lower chassis and the other end portion provided to the other of the first upper chassis and the first lower chassis to be relatively rotatable and slidable;

a rear link having one end portion rotatably connected to one of the second upper chassis and the second lower chassis and the other end portion provided to the other of the second upper chassis and the second lower chassis to be relatively rotatable and slidable;

when the frame is converted from the unfolded state to the folded state, the support frame moves upwards, and the upper chassis assembly and the lower chassis assembly are folded respectively along the front and back directions and are positioned between the front support and the rear support.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages: the child trailer provided by the utility model is provided with the side door capable of being opened and closed, a child can conveniently enter the trailer, and the child trailer occupies a small space after being folded, so that the child trailer is convenient to store and transport.

Drawings

FIG. 1 is a schematic side view of a child trailer according to the present invention with the frame in a deployed position;

FIG. 2 is a three-dimensional schematic view of a child trailer according to the present invention with the frame in an expanded position;

FIG. 3 is a schematic structural view of a side door locking mechanism in the child trailer of the present invention;

FIG. 4 is a schematic structural view of a rear locking assembly in the child trailer of the present invention, wherein the rear locking assembly locks the rear slider to the rear bottom bar;

FIG. 5 is a schematic structural view of the rear locking assembly of the child trailer of the present invention, wherein the rear locking assembly unlocks the rear slider and the rear bottom bar;

FIG. 6 is a schematic side view of the frame of the child trailer of the present invention during transition from an expanded position to a collapsed position;

FIG. 7 is a three-dimensional schematic view of a frame of the children's trailer of the present invention during conversion from an unfolded state to a folded state;

FIG. 8 is a side view of the frame of the child trailer of the present invention in a folded position;

FIG. 9 is a three-dimensional schematic view of a child trailer according to the present invention with the frame in a folded position;

wherein: 100. a frame;

1. a front bracket; 11. a front support rod; 12. a front upper cross bar; 12a, a clamping seat; 13. a front lower cross bar;

2. a rear bracket; 21. a rear support rod; 22. a rear upper cross bar; 23. a rear lower cross bar;

3. a support frame; 31. a support bar; 32. a cross bar; 33. an unlocking operation member; 33a, pulling the handle; 33b, a second arc-shaped groove;

4. an upper chassis assembly; 41. a first upper bottom bar; 42. a second upper bottom bar; 42b, a locking portion; 43. a first cross bar; 44. a second cross bar;

5. a lower chassis assembly; 51. a front bottom bar; 52. a rear sill bar; 53. a lock hole;

6. a front connecting frame; 61. a front link; 62. a front slider;

7. a rear connecting frame; 71. a rear connecting rod; 72. a rear slider;

8. a side door; 80a, a door frame body; 80b, a lock base; 80c, an arc-shaped limiting groove I; 80d, an arc-shaped limiting groove II; 81. a locking member; 81a, a columnar rod portion; 81b, a head; 81c and a limiting groove; 82. a first elastic member; 83. a limit retainer ring; 84. a limiting member; 84a and a limiting sheet; 84b, an operation head; 84c, a limiting hole; 85. a second elastic member;

9. a pull rod;

200. a front wheel assembly; 300. a rear wheel assembly;

400. a locking mechanism; 402. a rear locking assembly; 403. a rear locking member; 404. a rear linkage; 405. a rear traction rope; 406. a second return spring; 407. a rear pull rod;

a. a first rotational centerline; b. a second centerline of rotation.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the specific embodiments.

The description of the up-down, left-right, front-back, inner-outer, etc. directions herein is defined in terms of the up-down, left-right, front-back, inner-outer, etc. directions as viewed by a child seated on the child trailer.

A children's trailer, as shown in fig. 1 and 2, includes a frame 100 having an unfolded state and a folded state, a front wheel assembly 200 and a rear wheel assembly 300 provided at the bottom of the frame 100, and a locking mechanism 400 for locking the frame 100 in the unfolded state. The vehicle frame 100 includes: a front bracket 1 with a front wheel assembly 200 at the bottom, a rear bracket 2 with a rear wheel assembly 300 at the bottom, and a supporting frame arranged between the front bracket 1 and the rear bracket 2 in a foldable manner.

In the unfolded state, the front bracket 1 includes two front support rods 11 respectively disposed at the left and right sides of the frame 100 and vertically extending in the up-down direction, a front upper cross bar 12 disposed between the upper end portions of the two front support rods 11 and vertically extending in the up-down direction, and a front lower cross bar 13 disposed between the lower end portions of the two front support rods 11 and vertically extending in the left-right direction; the rear frame 2 includes two rear stays 21 respectively disposed on left and right sides of the frame 100 and extending in the vertical direction, a rear upper cross bar 22 disposed between upper ends of the two rear stays 21 and extending in the horizontal direction, and a rear lower cross bar 23 disposed between lower ends of the two rear stays 21 and extending in the horizontal direction.

The supporting frame comprises a supporting frame 3, an upper chassis component 4 and a lower chassis component 5 which are arranged up and down. Specifically, the support frame 3 is located between the front bracket 1 and the rear bracket 2 in the front-rear direction, and extends in the up-down direction in the deployed state. Specifically, the support frame 3 extends in a U shape with an upward opening, and includes two support rods 31 respectively disposed on the left and right sides of the frame 100 and extending in the up-down direction, and a cross bar 32 connected between the lower end portions of the two support rods 31 and extending in the left-right direction, where the cross bar 32 is integrally provided with the support rods 31 on both sides.

In the unfolded state, the upper chassis assembly 4 and the lower chassis assembly 5 both extend in the front-rear direction, and the upper chassis assembly 4 is located above the lower chassis assembly 5. The upper chassis assembly 4 includes a first upper chassis and a second upper chassis extending in a front-rear direction, respectively, a front portion of the first upper chassis is rotatably connected to the front bracket 1, a rear portion of the second upper chassis is rotatably connected to the rear bracket 2, two of the rear portion of the first upper chassis, the front portion of the second upper chassis, and an upper portion of the support bracket 3 are rotatably connected to one of the two, or the rear portion of the first upper chassis, the front portion of the second upper chassis, and the upper portion of the support bracket 3 are rotatably connected around the same rotation center line. Specifically, in the present embodiment, the first upper chassis has two first upper bottom rods 41 respectively disposed on the left and right sides of the frame 100 and extending in the front-rear direction, and the second upper chassis has two second upper bottom rods 42 respectively disposed on the left and right sides of the frame 100 and extending in the front-rear direction. On each of the left and right sides of the vehicle frame 100, the front end portion of the first upper bottom link 41 is pivotally connected to the front stay 11, the rear end portion of the second upper bottom link 42 is pivotally connected to the rear stay 21, and the rear end portion of the first upper bottom link 41, the front end portion of the second upper bottom link 42, and the upper end portion of the support link 31 are pivotally connected about the first pivot axis a.

In the unfolded state, the lower chassis assembly 5 includes a first lower chassis and a second lower chassis extending in the front-rear direction, respectively, a front portion of the first lower chassis is rotatably connected to the front bracket 1, a rear portion of the second lower chassis is rotatably connected to the rear bracket 2, two of the rear portion of the first lower chassis, the front portion of the second lower chassis, and the lower portion of the support bracket 3 are rotatably connected and a third one is rotatably connected to one of the two, or the rear portion of the first lower chassis, the front portion of the second lower chassis, and the lower portion of the support bracket 3 are rotatably connected around the same rotation center line. Specifically, in the present embodiment, the first lower chassis includes a front bottom bar 51 extending in the front-rear direction, the second lower chassis includes a rear bottom bar 52 extending in the front-rear direction, a front end portion of the front bottom bar 51 is rotatably connected to a middle position in the left-right direction of the front lower cross bar 13, a rear end portion of the rear bottom bar 52 is rotatably connected to a middle position in the left-right direction of the rear lower cross bar 23, and a rear end portion of the front bottom bar 51, a front end portion of the rear bottom bar 52, and the cross bar 32 are rotatably connected about the second rotation center line b.

The first rotation center line a and the second rotation center line b are parallel to each other, and the first rotation center line a is located above the second rotation center line b.

The support frame further comprises a front attachment frame 6 and a rear attachment frame 7. Specifically, one end of the front link 6 is rotatably connected to one of the first upper chassis and the first lower chassis, and the other end of the front link 6 is provided to the other of the first upper chassis and the first lower chassis so as to be relatively rotatable and slidable. In the present embodiment, the first upper chassis further includes a first cross bar 43 disposed between the two first upper bottom bars 41 and extending in the left-right direction, the first cross bar 43 has two first cross bars disposed in tandem, and the first cross bar 43 located at the front side is disposed between the front end portions of the two first upper bottom bars 41. The front link 6 includes two front links 61 respectively disposed on the left and right sides and disposed in parallel to each other, and in the unfolded state, the two front links 61 extend obliquely downward from front to rear, front end portions of the two front links 61 are respectively rotatably connected to the first cross bar 43 located on the front side, a front slider 62 is rotatably disposed between rear end portions of the two front links 61, and the front slider 62 is slidably disposed on the front bottom bar 51 in the longitudinal direction of the front bottom bar 51. In this embodiment, the front sliding member 62 and the front bottom bar 51 are located between the two front links 61, and the front sliding member 62 is a sliding sleeve slidably sleeved on the front bottom bar 51 along the length direction of the front bottom bar 51.

One end of the rear link 7 is rotatably connected to one of the second upper chassis and the second lower chassis, and the other end of the rear link 7 is provided to the other of the second upper chassis and the second lower chassis so as to be relatively rotatable and slidable. In the present embodiment, the second upper chassis further includes a second cross bar 44 disposed between the two second upper bottom bars 42 and extending in the left-right direction, the second cross bar 44 has two bars disposed in tandem, wherein the second cross bar 44 located at the rear side is disposed between the rear end portions of the two second upper bottom bars 42. The rear link frame 7 includes two rear links 71 that are disposed on the left and right sides and parallel to each other, and in the unfolded state, the two rear links 71 extend obliquely upward from front to rear, rear end portions of the two rear links 71 are rotatably connected to the second cross bar 44 on the rear side, respectively, a rear slider 72 is rotatably disposed between front end portions of the two rear links 71, and the rear slider 72 is slidably disposed on the rear bottom bar 52 in the longitudinal direction of the rear bottom bar 52. In this embodiment, the rear slider 72 and the rear bottom bar 52 are located between the two rear links 71, and the rear slider 72 is a sliding sleeve slidably sleeved on the rear bottom bar 52 along the length direction of the rear bottom bar 52.

The frame 100 further comprises a side door 8, wherein the side door 8 is movably arranged on at least one of the support frame, the front support 1 and the rear support 2, the side door 8 has an open state and a closed state, and when the side door 8 is in the open state, a channel is formed between the front support 1 and the rear support 2 and is positioned above the support frame, so that a child can get on or off a trailer; when side door 8 is in the closed condition, side door 8 is located between front truck 1 and rear frame 2 and is located the left side portion or the right side portion of frame 100 along the fore-and-aft direction, and side door 8 extends and at least part exceeds the braced frame along upper and lower direction to one side formation in the trailer left and right sides direction encloses fender and protection. The side doors 8 are provided with a group, and the side doors 8 are movably arranged on the front bracket 1 or the rear bracket 2; or, there are two groups of side doors 8, one group of side doors 8 is movably arranged on the front bracket 1 and the other group of side doors 8 is movably arranged on the rear bracket 2.

Specifically, in the present embodiment, there are two groups of side doors 8, two groups of side doors 8 form side walls on the side portions of the frame 100 in the closed state, each group of side doors 8 includes a frame-shaped door frame body 80a, wherein the door frame body 80a of one group of side doors 8 is rotatably disposed on the front support rod 11 around the axis of the front support rod 11, the door frame body 80a of the other group of side doors 8 is rotatably disposed on the rear support rod 21 around the axis of the rear support rod 21, and the door frame body 80a is entirely located above the upper chassis assembly 4.

It should be noted that in some other embodiments, the left side portion and the right side portion of the frame 100 should be able to be respectively provided with the side doors 8.

Be equipped with between side door 8 and the braced frame and be used for locking the side door locking mechanical system under the closed condition with side door 8, specifically to in this embodiment, every group side door 8 all is including setting up the lock seat 80b in door frame body 80a bottom, and side door locking mechanical system has two sets of and divides to locate on two sets of lock seats 80b one before the other, and wherein, the side door locking mechanical system who is located the front side is located between side door 8 and first last bottom bar 41 in the up-and-down direction, and the side door locking mechanical system who is located the rear side is located between side door 8 and the second last bottom bar 42 in the up-and-down direction.

Hereinafter, a side door lock mechanism between the side door 8 and the second upper bottom lever 42 will be described as an example.

Referring to fig. 3, the side door locking mechanism includes a locking member 81 provided on the lock base 80b slidably in the vertical direction, a locking portion 42b provided on the second upper bottom bar 42 to be engaged with the locking member 81, the locking member 81 having a first position and a second position on its own sliding path, wherein the first position is located below the second position, the locking member 81 is engaged with the locking portion 42b when the locking member 81 is in the first position so that the side door locking mechanism is in a locked state, and the locking member 81 is disengaged from the locking portion 42b when the locking member 81 is in the second position so that the side door locking mechanism is in an unlocked state.

The side door locking mechanism further comprises a first elastic member 82 for providing acting force required for moving the locking member 81 from the first position to the second position, specifically, the locking member 81 comprises a columnar rod portion 81a and a head portion 81b positioned at the top of the columnar rod portion 81a, a limit stop ring 83 is arranged on the peripheral side portion of the columnar rod portion 81a, and the outer diameter of the limit stop ring 83 is larger than that of the columnar rod portion 81 a. The first elastic member 82 is slidably fitted over the cylindrical rod portion 81a, an upper end portion of the first elastic member 82 abuts against the position-limiting retainer ring 83, a lower end portion of the first elastic member 82 abuts against an inner side wall of the bottom of the lock seat 80b, and when the locking member 81 is located at the first position, the first elastic member 82 is pressed by the position-limiting retainer ring 83 to accumulate an elastic force for driving the locking member 81 to slide upward.

The side door locking mechanism further includes a limiting member that limits the locking member 81 in the first position. Specifically, the limiting component includes a limiting member 84, and the limiting member 84 is slidably disposed on the lock seat 80b and has a sliding direction perpendicular to the sliding direction of the locking member 81. Specifically, the limiting member 84 includes a limiting piece 84a and an operating head 84b connected in the length direction, the limiting piece 84a has a limiting hole 84c capable of allowing the cylindrical rod portion 81a to pass through in a sliding manner, and the outer diameter of the limiting hole 84c is smaller than the outer diameter of the limiting retainer 83. A stopper groove 81c is formed in the outer peripheral portion of the columnar rod portion 81a, and the stopper groove 81c is located between the head portion 81b and the stopper collar 83. When the side door locking mechanism is in a locked state, part of the inner wall of the limiting hole 84c is mutually clamped with the limiting groove 81 c; when the side door lock mechanism is in the unlocked state, part of the inner wall of the stopper hole 84c is disengaged from the stopper groove 81c, and the columnar rod portion 81a can slidably pass through the stopper hole 84 c.

The position-limiting assembly further includes a second elastic member 85 providing an acting force required for the movement of the position-limiting member 84 along the sliding direction thereof, specifically, in the present embodiment, the second elastic member 85 provides an elastic force for the outward sliding of the position-limiting member 84 along the sliding direction thereof, when the side door locking mechanism is switched from the unlocking state to the locking state, the head portion 81b is pressed downward, the locking member 81 slides downward, the cylindrical rod portion 81a is gradually inserted in the locking portion 42b in a sliding fit manner, when the cylindrical rod portion 81a slides to a position where the position of the position-limiting groove 81c located thereon corresponds to the position of the position-limiting hole 84c, at this time, the second elastic member 85 drives the position-limiting member 84 to slide outward, a part of the inner wall of the position-limiting hole 84c is engaged with the position-limiting groove 81c, and the side door locking mechanism is locked; when the side door locking mechanism is switched from the locking state to the unlocking state, the operating head 84b is pressed inwards, so that the inner wall of the limiting hole 84c is disengaged from the limiting groove 81c, the first elastic piece 82 releases the elastic force to drive the locking piece 81 to slide upwards, the columnar rod part 81a is disengaged from the locking part 42b, and the side door locking mechanism is unlocked.

A front limiting structure for limiting the range of the rotation angle of the side door 8 is further arranged between the front support rod 11 and the side door 8, specifically, the front limiting structure is arranged at the rotary connection position between the door frame body 80a and the front support rod 11, and comprises an arc-shaped limiting groove I80 c which is arranged on the door frame body 80a and extends along the circumferential direction of the front support rod 11, and a front limiting pin (not shown in the figure) which is inserted in the arc-shaped limiting groove I80 c in a sliding fit manner and is fixedly connected with the front support rod 11. A rear limiting structure for limiting the range of the rotation angle of the side door 8 is further arranged between the rear support rod 21 and the side door 8, specifically, the rear limiting structure is arranged at the rotary connection position between the door frame body 80a and the rear support rod 21, the rear limiting structure comprises a second arc-shaped limiting groove 80d which is arranged on the door frame body 80a and extends along the circumferential direction of the rear support rod 21, and a rear limiting pin (not shown in the figure) which is inserted in the second arc-shaped limiting groove 80d in a sliding fit manner and fixedly connected with the rear support rod 21, because of the arrangement of the first arc-shaped limiting groove 80c and the front limiting pin (not shown in the figure), the front group of side doors 8 have a first limiting position and a second limiting position, when the first limiting position is located, the front group of side doors 8 are in a closed state and cannot rotate inwards any more, when the first limiting position is switched to the second limiting position, the front group of side doors 8 rotate outwards by 90 degrees relative to the axis of the front support rod 11, when the rear side door 8 is in the second limit position, the front side door 8 cannot rotate outwards, similarly, due to the arrangement of the arc-shaped limit groove two 80d and the rear limit pin (not shown in the figure), the rear side door 8 has the first limit position and the second limit position, when the rear side door 8 is in the first limit position, the rear side door 8 is in the closed state and cannot rotate inwards, when the first limit position is converted to the second limit position, the rear side door 8 rotates outwards by 90 degrees relative to the axis of the rear support rod 21, and when the rear side door 8 is in the second limit position, the rear side door 8 cannot rotate outwards, so that the arrangement enables a consumer to lock the side door 8 more conveniently when the first limit position is in the first limit position, and when the second limit position is in the second limit position, the side door 8 cannot rotate randomly, and the situation that children are interfered to enter the trailer.

The frame 100 further comprises a pull rod 9 rotatably arranged at the middle position of the left and right directions of the front lower cross rod 13, and the front upper cross rod 12 is provided with a clamping seat 12a for matching and clamping with the pull rod 9.

The front wheel assemblies 200 have two sets disposed on the left and right sides of the frame 100, the rear wheel assemblies 300 have two sets disposed on the left and right sides of the frame 100, and the two sets of front wheel assemblies 200 are positioned between the two sets of rear wheel assemblies 300 in the left-right direction. In this embodiment, the front wheel assembly 200 is a universal wheel assembly, and the front wheel assembly 200 is disposed at the bottom of the front stay 11 in a universal rotation manner and the rear wheel assembly 300 is disposed at the bottom of the rear stay 21 on each of the left and right sides of the vehicle frame 100.

The locking mechanism 400 includes a front locking assembly for locking the front slide 62 and a rear locking assembly 402 for locking the rear slide 72. The front locking assembly is identical in construction to the rear locking assembly 402 and is disposed in front of and behind one another.

The supporting frame 3 is further provided with an unlocking operation member 33 for simultaneously unlocking the front locking member and the rear locking member 402, and the rear end portion of the front bottom bar 51, the front end portion of the rear bottom bar 52 and the unlocking operation member 33 are rotatably connected around a second rotation center line b, which extends in a collinear manner with the axis of the cross bar 32 itself. The unlock operation member 33 has a pull tab 33a, and in the expanded state, the pull tab 33a is brought into close contact with the front bottom bar 51.

Hereinafter, the locking member 402 will be described in detail as an example.

Referring to fig. 4 and 5, the rear locking assembly 402 includes a rear locking member 403 slidably disposed on the rear slider 72, a sliding direction of the rear locking member 403 is perpendicular to a sliding direction of the rear slider 72, a locking hole 53 is disposed at a bottom of the rear bottom bar 52, and the rear locking member 403 is fittingly inserted into the locking hole 53 when the rear locking assembly 402 is locked.

A rear interlocking unit for interlocking the sliding of the rear locking member 403 when the unlocking operation member 33 rotates is provided between the unlocking operation member 33 and the rear locking member 403. The rear linkage assembly includes a rear linkage member 404 slidably disposed in the rod cavity of the rear ground rod 52 along the length direction of the rear ground rod 52, a rear traction cable 405 fixedly connected between the rear linkage member 404 and the rear locking member 403, a second return spring 406 providing a force required to move the rear linkage member 404 toward the rear locking member 403, and a rear pull rod 407 disposed between the unlocking operation member 33 and the rear linkage member 404. The unlocking operation member 33 is provided with a second arc-shaped groove 33b, and the second arc-shaped groove 33b is an eccentric arc-shaped groove, that is, the rotation center line of the second arc-shaped groove 33b deviates from the rotation center line (second rotation center line b) of the unlocking operation member 33. One end of the rear rod 407 is slidably disposed in the second arc-shaped slot 33b, and the other end of the rear rod 407 is disposed on the rear link 404. When unlocking, the pulling handle 33a is pulled backwards, the unlocking operation member 33 rotates clockwise and upwards around the second rotation center line b, due to the guiding effect of the second arc-shaped groove 33b, the rear pulling rod 407 slides in the second arc-shaped groove 33b, and the rear pulling rod 407 moves forwards from the back to the back relative to the rear bottom rod 52, so that the rear pulling rod 407 pulls the rear linkage 404 to slide forwards along the length direction of the rear bottom rod 52, and is pulled by the rear pulling rope 405, the rear locking piece 403 slides upwards along the sliding direction to be disengaged from the locking hole 53, and the rear locking assembly 402 is unlocked. In the unlocking process, the second return spring 406 is stretched by the rear pull rod 407 and accumulates elastic force. When locking, when the rear sliding member 72 slides along the rear bottom bar 52 until the rear locking member 403 corresponds to the locking hole 53, the pulling handle 33a is pulled forward, the unlocking operation member 33 rotates counterclockwise and downward around the second rotation center line b, the second return spring 406 releases the elastic force to drive the rear linkage member 404 to slide toward the rear locking member 403, the rear traction cable 405 is released from traction, and the rear locking member 403 is fittingly inserted into the locking hole 53.

The front lock assembly includes a front lock member provided on the front slider 62 so as to be relatively slidable in a direction perpendicular to the sliding direction of the front slider 62. A front interlocking component for interlocking the sliding of the front locking piece when the unlocking operation piece 33 rotates is arranged between the unlocking operation piece 33 and the front locking piece. The front linkage assembly comprises a front linkage piece arranged on the front bottom rod 51 in a sliding mode, a front traction cable fixedly connected between the front linkage piece and the front locking piece, a first return spring providing acting force required by the movement of the front linkage piece towards the front locking piece, and a front pull rod arranged between the unlocking operation piece 33 and the front linkage piece, a first arc-shaped groove is formed in the unlocking operation piece 33, the rotating center line of the first arc-shaped groove deviates from the rotating center line of the unlocking operation piece 33, namely, the second rotating center line b, one end of the front pull rod is arranged in the first arc-shaped groove in a sliding mode, and the other end of the front pull rod is arranged on the front linkage piece.

When the vehicle body frame 100 is in the unfolded state, as shown in fig. 1 and 2, the front bracket 1 and the rear bracket 2 both extend in the up-down direction, the support frame provided between the front bracket 1 and the rear bracket 2 extends in the front-back direction, the door frames 80a of the two groups of side doors 8 can relatively rotate around the front support bar 11 and the rear support bar 21, respectively, and when in the closed state, the door frames 80a of the two groups of side doors 8 form side walls on the side portions of the vehicle body frame 100. The front wheel assembly 200 and the rear wheel assembly 300 are supported on the ground, and the pull rod 9 is pulled forward, so that the children's trailer can be dragged to run.

When the frame 100 is switched from the unfolded state to the folded state, as shown in fig. 6 and 7, the operating head 84b is pressed inward, the locking of the two sets of side door locking mechanisms is released, the door frame bodies 80a of the two sets of side doors 8 are pushed inward respectively, so that the door frame body 80a of one set of side doors 8 rotates inward around the axial line of the front support rod 11 and is folded between the two front support rods 11 in a left-right manner, and the door frame body 80a of the other set of side doors 8 rotates inward around the axial line of the rear support rod 21 and is folded between the two rear support rods 21 in a left-right manner; the pull rod 9 is pushed backwards, the pull rod 9 rotates backwards around the rotating connection part between the pull rod and the front lower cross rod 13, and the pull rod is clamped on the clamping seat 12a in a matching mode.

Thereafter, pull handle 33a is pulled rearward so that the front and rear locking assemblies 402 are unlocked simultaneously. Then, the pull handle 33a is pulled upwards, the support frame 3 moves upwards, the front bottom rod 51 and the rear bottom rod 52 are gradually and relatively folded around the second rotation center line b in the front-rear direction, the front sliding piece 62 is gradually and backwards slid along the length direction of the front bottom rod 51, and the rear sliding piece 72 is gradually and forwards slid along the length direction of the rear bottom rod 52; simultaneously, on each of the left and right sides of the frame 100, the first and second upper bottom bars 41 and 42 are gradually relatively drawn in the front-rear direction about the first rotation center line a, the front support bar 11 and the rear support bar 21 are gradually relatively drawn in the front-rear direction, and accordingly, the front and rear wheel assemblies 200 and 300 are gradually relatively drawn in the front-rear direction.

When the frame 100 is in the folded state, referring to fig. 8 and 9, the two front support rods 11 and the rear support rod 21 on the same side are folded in the front-rear direction, the two first upper bottom rods 41 and the second upper bottom rod 42 on the same side are folded in the front-rear direction, the front bottom rod 51 and the rear bottom rod 52 are folded in the front-rear direction, and the upper chassis assembly 4 and the lower chassis assembly 5 are folded between the front bracket 1 and the rear bracket 2. The front wheel assemblies 200 and the rear wheel assemblies 300 are relatively folded in the front-rear direction, and the two sets of front wheel assemblies 200 are folded between the two sets of rear wheel assemblies 300 in the left-right direction.

In conclusion, the child trailer provided by the utility model is provided with the side door 8 capable of being opened and closed, so that a child can conveniently enter the trailer, and the child trailer occupies a small space after being folded, and 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. The utility model provides a children's trailer, includes the frame, locates the wheel subassembly of frame bottom, its characterized in that: the frame comprises a front support and a rear support which are respectively arranged in the front and rear direction and extend along the up-down direction, a support frame which is arranged between the front support and the rear support and extends along the front and rear direction, and a side door which is movably arranged on at least one of the support frame, the front support and the rear support,

the side door is provided with an open state and a closed state, and when the side door is in the open state, a channel is formed between the front bracket and the rear bracket and is positioned above the supporting frame; work as the side door is in under the closed condition, the side door is located along the fore-and-aft direction the fore-stock with just be located between the after-poppet the left side portion or the right side portion of frame, the side door extends and at least part is higher than along upper and lower direction braced frame.

2. The children's trailer of claim 1, wherein: the side doors are provided with a group and movably arranged on the front bracket or the rear bracket; alternatively, the first and second electrodes may be,

the side door has two sets ofly, and is a set of the side door sets up movably on the fore-stock and another group the side door is located movably on the after-poppet.

3. The children's trailer of claim 2, wherein: the front support is provided with a front support rod which is positioned on the side part and extends along the vertical direction, the side door is rotatably arranged on the front support rod around the axial lead of the front support rod, and a front limiting structure for limiting the range of the rotation angle of the side door is arranged between the front support rod and the side door; and/or the presence of a gas in the gas,

the after-poppet has the back branch that is located the lateral part and extends along upper and lower direction, the side door winds the axial lead of preceding branch sets up with rotating on the back branch, back branch with still be equipped with between the side door and be used for the restriction the back limit structure of side door turned angle scope.

4. The children's trailer of claim 2, wherein: the side door around the rotation center line that vertical direction extends with the fore-stock and/or the after-poppet sets up with rotating, the side door with still be equipped with between the braced frame and be used for with the side door locking mechanism under the closed condition.

5. The children's trailer of claim 4, wherein: the side door is located entirely above the support frame, and the side door locking mechanism is arranged between the lower portion of the side door and the upper portion of the support frame.

6. The children's trailer of claim 5, wherein: side door locking mechanical system is including can following vertical direction setting with sliding locking piece, setting on the side door are in on the braced frame with locking portion that the locking piece was mutually supported, the locking piece has primary importance and second place on self sliding path, works as when the locking piece is in the primary importance, the locking piece with the locking portion cooperation makes side door locking mechanical system is in the locking state, works as when the locking piece is in the second place, the locking piece with the locking portion breaks away from the cooperation and makes side door locking mechanical system is in the unblock state, side door locking mechanical system still including providing the locking piece by the primary importance to the first elastic component of the required effort of second place motion, and will the locking piece restriction is in spacing subassembly under the primary importance.

7. The children's trailer of claim 6, wherein: the limiting assembly comprises a limiting piece, the limiting piece is arranged on the side door in a sliding manner, the sliding direction of the limiting piece is perpendicular to the sliding direction of the locking piece, a limiting hole through which the limiting piece can pass in a sliding manner is formed in the limiting piece, a limiting groove is formed in the peripheral portion of the outer side of the locking piece, and when the side door locking mechanism is in a locking state, part of the inner wall of the limiting hole is clamped with the limiting groove; when side door locking mechanical system is in the unblock state, the inner wall in spacing hole with the spacing groove breaks away from the cooperation, the locking piece can certainly pass with sliding in the spacing hole, spacing subassembly is still including providing the second elastic component of the required effort of locating part along its slip direction motion.

8. The children's trailer of claim 7, wherein: the locking piece includes column pole portion and is located the head at column pole portion top, the column pole portion is last to have spacing retaining ring, the external diameter of spacing retaining ring is greater than the external diameter of column pole portion reaches the aperture in spacing hole, the spacing groove is located on the column pole portion and be located the head with between the spacing retaining ring, the locating part includes along length direction the spacing piece and the operation head that meet, spacing hole is located on the spacing piece.

9. The children's trailer according to any one of claims 4 to 8, wherein: the side door comprises a frame-shaped door frame body and a lock seat arranged on the door frame body, and the side door locking mechanism is arranged on the lock seat;

and/or the side door locking mechanism is arranged on the side door and is far away from the rotation center line of the side door;

and/or the side door is arranged on one side or two sides of the left side and the right side of the frame;

and/or, the side door forms a side enclosure on a side of the frame in the closed state;

and/or, braced frame can fold up along the fore-and-aft direction and set up, the frame has expansion state and fold condition, works as the frame is by the in-process that expansion state to fold condition conversion, the side door is prior to the fore-stock and/or the after-poppet rotates to draw in, braced frame folds up along the fore-and-aft direction the fore-stock with between the after-poppet.

10. The children's trailer according to any one of claims 1 to 8, wherein: the wheel subassembly is including locating the front wheel subassembly of fore-stock bottom and locating the rear wheel subassembly of rear bracket bottom, braced frame includes:

the supporting frame extends along the vertical direction;

an upper chassis assembly including a first upper chassis and a second upper chassis extending in a front-rear direction, respectively, a front portion of the first upper chassis being rotatably connected to the front bracket, a rear portion of the second upper chassis being rotatably connected to the rear bracket, the rear portion of the first upper chassis, the front portion of the second upper chassis, and an upper portion of the support frame being rotatably connected around a same rotational axis;

a lower chassis assembly including a first lower chassis and a second lower chassis extending in a front-rear direction, respectively, a front portion of the first lower chassis being rotatably connected to the front bracket, a rear portion of the second lower chassis being rotatably connected to the rear bracket, the rear portion of the first lower chassis, the front portion of the second lower chassis, and a lower portion of the support frame being rotatably connected around a same rotational axis;

a front link having one end portion rotatably connected to one of the first upper chassis and the first lower chassis and the other end portion provided to the other of the first upper chassis and the first lower chassis to be relatively rotatable and slidable;

a rear link having one end portion rotatably connected to one of the second upper chassis and the second lower chassis and the other end portion provided to the other of the second upper chassis and the second lower chassis to be relatively rotatable and slidable;

when the frame is converted from the unfolded state to the folded state, the support frame moves upwards, and the upper chassis assembly and the lower chassis assembly are folded respectively along the front and back directions and are positioned between the front support and the rear support.

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