CN216580664U - Frame and baby's shallow - Google Patents

Abstract

The present disclosure relates to a frame and a stroller. The frame includes: the front foot group comprises a front foot rod, a front wheel group arranged at the lower end of the front foot rod and a front foot joint arranged at the upper end of the front foot rod; the rear foot group comprises two rear foot rods, two rear wheel groups respectively arranged at the lower ends of the two rear foot rods and two rear foot covers respectively arranged at the upper ends of the two rear foot rods; and the handle group comprises a handle rod, a handrail arranged at the upper end of the handle rod and a handle joint arranged at the lower end of the handle rod, wherein the front foot joint, the two rear foot covers and the handle joint are coaxially connected through a joint shaft, the upper end of the rear foot rod is hinged with the rear foot covers at the same side through a hinge shaft, and under the unfolding state and the folding state of the frame, the relative rotation angles of the front foot joint and the rear foot covers are different, so that the outer contour surfaces of different parts of the front foot joint are in contact with the upper end of the rear foot rod, and the rear foot rod swings to different angles relative to the rear foot covers. The folding device has the advantages that the folding device can achieve smaller folding size and has higher structural reliability.

Description

Frame and baby's shallow

Technical Field

The disclosure relates to the field of baby carriages, in particular to a frame and a baby stroller.

Background

In order to facilitate the storage of the baby stroller, most of the existing baby strollers can realize the folding of the front foot group, the rear foot group and the handle group in the front-rear direction. In order to further reduce the size of the baby stroller after being folded, in some related technologies, a sliding seat is disposed on the front leg assembly, and the rear leg assembly and the sliding seat are connected by a linkage rod. Therefore, when the front leg group is folded, the linkage rod is driven by the sliding of the sliding seat, and the linkage rod draws the two rear leg rods in the rear leg group inwards in the left-right direction, so that the folding size in the left-right direction is reduced.

SUMMERY OF THE UTILITY MODEL

The inventor researches and discovers that although the baby stroller in the related art can realize inward folding of the rear foot rods in the left and right directions, the matching structure of the sliding seat and the linkage rod is poor in reliability and easy to damage after being used for a long time.

In view of this, the present disclosure provides a stroller frame and a stroller, which can achieve a smaller folding size and have a higher structural reliability.

In one aspect of the present disclosure, there is provided a vehicle frame comprising:

the front foot group comprises a front foot rod, a front wheel group arranged at the lower end of the front foot rod and a front foot joint arranged at the upper end of the front foot rod;

the rear foot group comprises two rear foot rods, two rear wheel groups respectively arranged at the lower ends of the two rear foot rods and two rear foot covers respectively arranged at the upper ends of the two rear foot rods; and

the handle group comprises a handle rod, a handrail arranged at the upper end of the handle rod and a handle joint arranged at the lower end of the handle rod,

the front foot joint, the two rear foot covers and the handle joint are coaxially connected through joint shafts, the upper end of the rear foot rod is hinged with the rear foot cover on the same side through a hinge shaft, the relative rotation angles of the front foot joint and the rear foot cover are different in the unfolded state and the folded state of the frame, so that the outer contour surfaces of different parts of the front foot joint are in contact with the upper end of the rear foot rod, and the rear foot rod swings to different angles relative to the rear foot cover.

In some embodiments, the outer contoured surface of the forefoot joint includes a first outer contoured surface and a second outer contoured surface, the first outer contoured surface being a greater distance from the axis of rotation of the forefoot joint than the second outer contoured surface;

in the unfolded state of the frame, the first outer contour surface abuts against the upper end of the rear foot rod so that the rear foot rod swings outwards in the left-right direction of the frame, and the overall width of the two rear wheel sets in the left-right direction of the frame is larger than the width of the front wheel set in the left-right direction of the frame;

under the folding state of the frame, the second outer contour surface is abutted against the upper end of the rear foot rod, so that the rear foot rod swings inwards in the left and right directions of the frame, and the whole width of the two rear wheel sets in the left and right directions of the frame is smaller than the width of the front wheel set in the left and right directions of the frame.

In some embodiments, an axis of the hinge shaft between the rear foot bar and the rear foot cover is perpendicular to an axis of the joint shaft.

In some embodiments, the first outer contour surface is in smooth transition with the second outer contour surface, and the first outer contour surface is a circular arc shaped convex surface.

In some embodiments, the inner side of the rear foot cover is provided with a first stop block and a second stop block, the front foot joint is provided with a third stop block, the handle set further comprises a joint cover, the joint cover is fixedly connected with the handle joint, the joint cover is provided with a stop groove, and the second stop block is inserted into the stop groove and can slide in the stop groove;

in the unfolded state of the frame, the first blocking block abuts against the third blocking block to limit the rear foot cover to rotate in a first direction relative to the front foot joint, the second blocking block abuts against a circumferential groove wall on one side of the blocking groove to limit the rear foot cover to rotate in a second direction relative to the joint cover, and the second direction is the opposite direction of the first direction;

when the frame is folded from the unfolded state to the folded state, the joint cover rotates relative to the rear foot cover in the second direction, so that the blocking groove slides relative to the second blocking block, and the limitation of the rotation of the rear foot cover relative to the joint cover in the second direction is released;

under the folding state of the frame, the first blocking block abuts against the third blocking block to limit the rear foot cover to rotate in the second direction relative to the front foot joint, and the second blocking block abuts against the circumferential groove wall on the other side of the blocking groove to limit the rear foot cover to rotate in the first direction relative to the joint cover.

In some embodiments, the handlebar set further comprises:

the rotating block is rotatably connected with the handle joint through the joint shaft; and

a first slider slidably disposed within the handlebar joint and capable of extending and retracting relative to the handlebar joint,

under the unfolding state of the frame, the first sliding block extends out of the handlebar joint and is abutted against the front foot joint so as to limit the relative rotation between the front foot joint and the handlebar joint;

when the frame is folded from the unfolded state to the folded state, the rotating block is rotated to drive the first sliding block to retract into the handle joint, so that the limitation of relative rotation between the front foot joint and the handle joint is removed.

In some embodiments, the handlebar set further comprises:

a locking block lockably disposed within the handle bar;

the shifting block is arranged in the handle joint, the first end of the shifting block abuts against the rotating block, and the second end of the shifting block abuts against the locking block; and

the unlocking key is arranged on the handle rod, is connected with the locking block through a locking element and is configured to enable the locking element to be separated from a position where the locking block is locked relative to the handle rod after external force is applied, so that the locking block pushes the shifting block to move towards the rotating block.

In some embodiments, the rotating block has a first guiding sliding groove located on a side of the joint shaft away from the shifting block, the first sliding block has a pin hole and a second guiding sliding groove, the handle set further includes a pin rod penetrating through the first guiding sliding groove and the pin hole, the pin rod and the first guiding sliding groove are capable of sliding relatively along a length direction of the first guiding sliding groove, and the joint shaft penetrates through the second guiding sliding groove and is capable of sliding along a length direction of the second guiding sliding groove; in the rotating process of the rotating block, the first sliding block is driven by the pin rod to extend or retract relative to the handle joint.

In some embodiments, the handlebar set further comprises:

a first resilient member disposed between the first slider and the handlebar joint and configured to cause the first slider to extend outwardly relative to the handlebar joint.

In some embodiments, the vehicle frame further comprises:

a swivel, one end of which is hinged to the front foot joint, configured to support a stroller seat, and rotatably connected to the bottom of the stroller seat;

the sliding sleeve is sleeved on the front foot rod in a sliding manner; and

and the two ends of the supporting rod are respectively hinged with the other end of the rotating seat and the sliding sleeve, and the supporting rod is configured to form a supporting triangle between the rotating seat and the front foot rod in the unfolding state of the frame, and completely unfolded and attached to the front foot rod with the rotating seat in the folding state of the frame.

In some embodiments, the set of front legs further comprises:

the fixing seat is fixedly arranged in the front foot rod;

the second sliding block is arranged in the front foot rod and is connected with the fixed seat in a sliding manner, and the second sliding block is provided with a first end which is contacted with the handle group and a second end which is provided with a driving inclined plane; and

a third slider disposed in the front foot bar and slidably connected to the fixing base, the third slider having a plug pin portion and a wedge surface contacting the driving slope of the second slider,

under the unfolding state of the frame, the bolt part of the third sliding block extends out of the fixed seat and is inserted into the front foot rod and the through hole in the sliding sleeve so as to lock the position of the sliding sleeve on the front foot rod;

in the process of folding the frame from the unfolding state to the folding state, the second sliding block is pushed to move by the rotation of the handle group, so that the plug pin part of the third sliding block retracts from the front foot rod and the through hole on the sliding sleeve through the wedge-shaped matching of the driving inclined plane of the second sliding block and the wedge-shaped surface of the third sliding block, and the sliding sleeve is unlocked.

In some embodiments, the set of front legs further comprises:

a second elastic member disposed between the fixed seat and the second slider and configured to maintain the first end of the second slider in contact with the handle set.

In one aspect of the present disclosure, there is provided a stroller including: the frame is provided.

Therefore, according to the embodiment of the present disclosure, the upper end of the rear foot rod is hinged to the rear foot cover through the hinge shaft, and the relative rotation angles of the front foot joint and the rear foot cover are different in the unfolded state and the folded state of the frame, so that the outer contour surfaces of different parts of the front foot joint are in contact with the upper end of the rear foot rod, and the rear foot rod swings to different angles relative to the rear foot cover, thereby realizing the change of the swing angle of the rear foot rod relative to the rear foot cover while folding and unfolding the frame, and allowing the swing of the rear foot rod to realize a smaller folded size. Compared with the matching structure of the sliding seat and the linkage rod in the related art, the embodiment of the disclosure has better structural reliability and longer service life.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of some embodiments of the stroller of the present disclosure;

FIG. 2 is a schematic structural view of some embodiments of the vehicle frame of the present disclosure;

FIG. 3 is an exploded schematic view of some embodiments of the stroller of the present disclosure;

FIG. 4 is a schematic view of an assembled configuration of some embodiments of the disclosed vehicle frame near a joint axis;

FIG. 5 is a schematic view of a rear foot bar swinging to different angles relative to a rear foot cover in some embodiments of the vehicle frame of the present disclosure;

fig. 6 is a schematic folded structure of some embodiments of the vehicle frame of the present disclosure;

FIG. 7 is an exploded view of the rear leg assembly of some embodiments of the vehicle frame of the present disclosure;

FIG. 8 is a schematic structural view of a rear foot cover in some embodiments of the vehicle frame of the present disclosure;

FIGS. 9 (a) and (b) are schematic illustrations of the rotation of the rearfoot cover to different angles relative to the forefoot joint and the knuckle cover, respectively, in some embodiments of the disclosed vehicle frame;

FIG. 10 is an exploded view of a handlebar assembly in accordance with certain embodiments of the frame of the present disclosure;

FIG. 11 is an exploded view of the front leg assembly of some embodiments of the vehicle frame of the present disclosure;

FIG. 12 is a cross-sectional structural schematic view of some embodiments of the vehicle frame of the present disclosure near a joint axis;

FIG. 13 is a cross-sectional view of the handlebar assembly of FIG. 12 rotated a certain angle toward the rear leg assembly;

fig. 14 (a) - (l) are respectively schematic structural views of some components in some embodiments of the vehicle frame of the present disclosure.

It should be understood that the dimensions of the various parts shown in the figures are not drawn to scale. Further, the same or similar reference numerals denote the same or similar components.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.

The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, that particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

Fig. 1 is a schematic structural view of some embodiments of the stroller of the present disclosure. FIG. 2 is a schematic structural view of some embodiments of the vehicle frame of the present disclosure. Referring to fig. 1 and 2, in conjunction with fig. 3-14, embodiments of the present disclosure provide a frame and stroller. The frame can be used for baby carriages and also for other types of carriages. The frame includes: a front foot group 10, a rear foot group 20 and a handle group 30. A stroller seat 50 may also be mounted above the front foot set 10 for seating an infant or child.

The front leg assembly 10 includes a front leg rod 11, a front wheel assembly 12 disposed at a lower end of the front leg rod 11, and a front leg joint 13 disposed at an upper end of the front leg rod 11. The rear leg assembly 20 includes two rear leg rods 21, two rear wheel assemblies 22 respectively disposed at lower ends of the two rear leg rods 21, and two rear leg covers 23 respectively disposed at upper ends of the two rear leg rods 21. The handle group 30 includes a handle bar 31, a handrail 32 disposed at an upper end of the handle bar 31, and a handle joint 33 disposed at a lower end of the handle bar 31.

The front foot joint 13, the two rear foot covers 23 and the handle joint 33 are coaxially connected through a joint shaft 40, and the upper end of the rear foot rod 21 is hinged with the rear foot cover 23 on the same side through a hinge shaft 24. In the unfolded state and the folded state of the frame, the relative rotation angles of the front foot joint 13 and the rear foot cover 23 are different, so that different parts of the outer contour surface of the front foot joint 13 are in contact with the upper end of the rear foot rod 21, and the rear foot rod 21 swings to different angles relative to the rear foot cover 23.

In the embodiment, the upper end of the rear foot rod is hinged with the rear foot cover through the hinge shaft, and the relative rotation angles of the front foot joint and the rear foot cover are different in the unfolding state and the folding state of the frame, so that the outer contour surfaces of different parts of the front foot joint are in contact with the upper end of the rear foot rod, the rear foot rod swings to different angles relative to the rear foot cover, the frame can be folded and unfolded, the swing angle of the rear foot rod relative to the rear foot cover can be changed, and the folding size can be smaller by swinging the rear foot rod. Compared with a matching structure of a sliding seat and a linkage rod in the related technology, the embodiment of the disclosure has better structural reliability and longer service life.

Referring to fig. 4-6, in some embodiments, the outer contoured surface of forefoot joint 13 includes a first outer contoured surface 131 and a second outer contoured surface 132, the first outer contoured surface 131 being spaced farther from the axis of rotation of forefoot joint 13 than the second outer contoured surface 132 is spaced from the axis of rotation of forefoot joint 13. This assumes a state in which the first outer contour surface 131 is more outwardly convex than the second outer contour surface 132. First outer contoured surface 131 and second outer contoured surface 132 may be disposed adjacent to each other in the circumferential direction of forefoot joint 13 so that a change in the contact position of the upper end of heel stem 21 with first outer contoured surface 131 or second outer contoured surface 132 is achieved when heel stem 21 and forefoot joint 13 are rotated relative to each other.

In the unfolded state of the frame, the first outer contour surface 131 abuts against the upper end of the rear leg bar 21, so that the rear leg bar 21 swings outward in the left-right direction of the frame, and the entire width of the two rear wheel sets 22 in the left-right direction of the frame is larger than the width of the front wheel set 12 in the left-right direction of the frame. In fig. 7, it can be seen that a portion 212 where the upper end of the rear leg rod 21 can contact the forefoot joint is located on the lower side of the hinge shaft 24, and when the portion 212 is subjected to a downward or rightward pressing force by the first outer-contoured surface 131 which is more convex outward, the entire rear leg rod 21 can be rotated counterclockwise about the hinge shaft 24, so that the rear leg rod 21 is spread outward. At this time, the portion 214 of the upper end of the rear leg bar 21 can be locked into the groove provided on the rear leg cover 23, thereby ensuring the stability in the unfolded state.

In the collapsed state of the frame, the second outer contour surface 132 abuts against the upper end of the rear foot bar 21 so that the rear foot bar 21 swings inward in the left-right direction of the frame, and the overall width of the two rear wheel sets 22 in the left-right direction of the frame is smaller than the width of the front wheel set 12 in the left-right direction of the frame. When the user folds the frame, the front leg bar 11 and the rear leg bar 21 rotate relatively, so that the part 212 at the upper end of the rear leg bar 21 rotates from the position contacting with the first outer contour surface 131 to the position contacting with the second outer contour surface 132, and the second outer contour surface 132 does not protrude outwards or protrudes to a smaller extent, so that the rear leg bar 21 obtains a certain swing margin and becomes a free state capable of rotating inwards, and thus, in the folded state of the frame, the two rear wheel sets 22 obtain a smaller overall width in the left-right direction of the frame through swinging inwards.

By the swing of the rear foot rod 21 relative to the rear foot cover 23, the wider and more stable supporting function of the two rear wheel sets in the unfolded state of the frame and the folding effect of the two rear wheel sets in the folded state of the frame, which occupies less space, can be realized. Compared with the prior art, the matching structure is simple and reliable, and the first outer contour surface and the second outer contour surface can be integrally formed on the forefoot joint, so that the cost is low.

Referring to fig. 4-7, in some embodiments, the axis of the hinge shaft 24 between the rear leg bar 21 and the rear leg cover 23 is perpendicular to the axis of the joint shaft 40 and perpendicular to the length direction of the rear leg bar 21. The whole frame can be folded in a plane range perpendicular to the axis of the joint shaft 40 and can also be folded in a plane range perpendicular to the axis of the hinge shaft 24, and the axis of the hinge shaft 24 is perpendicular to the axis of the joint shaft 40, so that the folded whole size is more compact. In addition, the axis of the hinge shaft 24 may be perpendicular to the longitudinal direction of the rear leg bar 21.

In order to make the switching of the contact position of the upper end of the rear foot bar 21 with the first outer contour surface 131 and the second outer contour surface 132 smoother, referring to fig. 4 and 11-13, in some embodiments, the first outer contour surface 131 smoothly transitions with the second outer contour surface 132, and the first outer contour surface 131 is a circular arc-shaped convex surface. The second outer contour surface 132 may or may not be designed as a convex surface.

Referring to fig. 4, 8, 9 and 14, in some embodiments, the inner side of the rear foot cover 23 has a first stopper 231 and a second stopper 232, the front foot joint 13 has a third stopper 133, the handle set 30 further includes a joint cover 34, the joint cover 34 is fixedly connected to the handle joint 33, the joint cover 34 has a blocking groove 341, and the second stopper 232 is inserted into the blocking groove 341 and is slidable in the blocking groove 341. The length of the blocking groove 341 in the circumferential direction is greater than the length of the second blocking piece 232 in the circumferential direction, so that the second blocking piece 232 slides in the blocking groove 341 when the rear foot cover 23 and the handle joint 13 rotate relatively.

In the unfolded state of the frame, the first stop block 231 abuts against the third stop block 133 to limit the rotation of the rear foot cover 23 relative to the front foot joint 13 in a first direction, and the second stop block 232 abuts against one side circumferential groove wall of the stop groove 341 to limit the rotation of the rear foot cover 23 relative to the joint cover 34 in a second direction, wherein the second direction is opposite to the first direction. Thus, the rear foot cover 23 and the front foot joint 13 can not rotate relatively under the unfolding state of the frame, and the stability of the frame under the unfolding state is ensured. The first direction may be a direction in which the rear leg assembly 20 rotates toward the handle assembly 30, and the second direction may correspond to a direction in which the rear leg assembly 20 rotates toward the front leg assembly 10.

In the process of folding the frame from the unfolded state to the folded state, the joint cover 34 rotates relative to the rear foot cover 23 in the second direction, so that the blocking groove 341 slides relative to the second blocking block 232, and the restriction of the rotation of the rear foot cover 23 relative to the joint cover 34 in the second direction is released. At this time, the rear leg assembly 20 can rotate towards the front leg assembly 10, so as to fold the rear leg assembly 20 and the front leg assembly 10.

In the folded state of the frame, the first stop block 231 abuts against the third stop block 133 to limit the rotation of the rear foot cover 23 relative to the front foot joint 13 in the second direction, and the second stop block 232 abuts against the other side circumferential groove wall of the stop groove 341 to limit the rotation of the rear foot cover 23 relative to the joint cover 34 in the first direction. At this time, the rear leg assembly 20 is restricted from rotating in a plane perpendicular to the axis of the joint shaft 40, and only the rear leg rod 21 is allowed to swing inward relative to the rear leg cover 23, so that the rear leg rod 21 is folded inward. Furthermore, referring to fig. 5, when the entire frame is lifted, the hinge shaft 24 is substantially parallel to the ground, and the rear foot bar 21 and the rear wheel set 22 swing inward from the position B to the position a by gravity, thereby automatically achieving inward collapsing of the rear foot bar.

Referring to fig. 10 and 12-13, in some embodiments, the handlebar assembly 30 further includes: a turning block 35 and a first slider 36. The rotating block 35 is rotatably connected to the handle joint 33 via the joint shaft 40. The first slider 36 is slidably disposed in the handlebar joint 33 and is capable of extending and retracting relative to the handlebar joint 33.

Referring to fig. 12, in the unfolded state of the frame, the first slider 36 extends from the handlebar joint 33 and abuts against the front foot joint 13 to limit the relative rotation between the front foot joint 13 and the handlebar joint 33. Referring to fig. 13, in the process of folding the frame from the unfolded state to the folded state, the first slider 36 is retracted into the handlebar joint 33 by rotating the rotating block 35, so as to release the restriction of the relative rotation between the front leg joint 13 and the handlebar joint 33.

To control the rotation of the rotation block 35 to adjust the position of the first slider 36 relative to the handlebar joint 33, referring to fig. 3, 10 and 12, in some embodiments, the handlebar assembly 30 further comprises: lock block 37, toggle block 38 and unlock key 39. A locking block 37 is lockably arranged in the handle bar 31. The shifting block 38 is disposed in the handle joint 33, and a first end of the shifting block 38 abuts against the rotating block 35 and a second end abuts against the locking block 37. An unlocking key 39 is provided on the handle lever 31 and is connected to the locking block 37 by a locking member 391. The unlocking key 39, when subjected to an external force, enables the locking element 391 to be moved out of the position in which the locking block 37 is locked with respect to the handle bar 31, so that the locking block 37 pushes the movement of the dial 38 towards the rotating block 35.

The unlocking key 39 may be provided on the handle 32 on the uppermost side of the handle bar 31, for example, on the lower side surface of the handle 32, for the user to grasp. The handle rod 31 may be configured as a telescopic rod structure, such as an outer telescopic rod 312 and an inner telescopic rod 311 shown in fig. 3, the inner telescopic rod 311 is fixedly connected to the handle 32, the lower end of the outer telescopic rod 312 is fixedly connected to the handle joint 33, and the locking block 37 may be fixedly connected to the lower end of the inner telescopic rod 311. In the expanded state of the frame, lock member 391 can lock the position of lock block 37 or inner telescopic rod 311 relative to outer telescopic rod 312.

When the user presses the unlocking key 39, the unlocking key 39 disengages the locking member 39 from the locking position by a flexible member such as a wire rope, so that the locking block 37 and the telescopic inner rod 311 can move relative to the telescopic outer rod 312. The user pushes on the handle 32 to move the locking block 37 toward the handle knuckle 33, and the locking block 37 pushes the paddle 38 toward the rotation block 35. Accordingly, the rotating block 35 rotates under the pushing action of the shifting block 38, and the first sliding block 36 is driven to retract inwards, so that the position for limiting the relative rotation between the front foot joint 13 and the handlebar joint 33 is separated. This releases the rotational restriction between the forefoot joint 13 and the handlebar joint 33 after the unlocking key is pressed.

In order for the rotating block 35 to more effectively drive the sliding of the first slider 36 relative to the handle joint 33, referring to fig. 10 and 12-14, in some embodiments, the rotating block 35 has a first guide runner 351 located on a side of the joint shaft 40 away from the dial block 38, and the first slider 36 has a pin hole 361 and a second guide runner 362. The handle set 30 further includes a pin 392 passing through the first guide sliding groove 351 and the pin hole 361, the pin 392 and the first guide sliding groove 351 are relatively slidable along a length direction of the first guide sliding groove 351, and the joint shaft 40 passes through the second guide sliding groove 362 and is slidable along a length direction of the second guide sliding groove 362; during the rotation of the rotating block 35, the pin 392 drives the first sliding block 36 to extend or retract relative to the handlebar joint 33.

In fig. 14 (h) and (i), the first guide chute 351 is located at one side of the shaft hole 352 for passing the joint shaft 40, the pin 392 passes through the pin hole 361 of the first slider 36 and the first guide chute 351 of the rotating block 35, and the joint shaft 40 passes through the shaft hole 352 of the rotating block 35 and the second guide chute 362 of the first slider 36. When the rotating block 35 rotates, the pin 392 is pushed by the groove wall of the first guiding sliding groove 351, and the pin 392 slides in the first guiding sliding groove 351 under the limitation of the pin hole 361 of the first sliding block 36 which can only slide relative to the handle joint 13, so as to drive the first sliding block 36 to slide.

Referring to fig. 12, the handlebar assembly 30 may further include a first resilient member 393, such as a spring, disposed between the first slider 36 and the handlebar joint 33, such that when the first slider 36 rotates counterclockwise about the rotation block 35, the first slider 36 is automatically extended outward relative to the handlebar joint 33 to a position that limits the relative rotation between the forefoot joint 13 and the handlebar joint 33.

Referring to fig. 2-4 and 11-12, in some embodiments, the vehicle frame further comprises: a rotary seat 51, a sliding sleeve 52 and a support rod 53. One end of the rotary seat 51 is hinged with the front foot joint 13. The swivel seat 51 is capable of supporting the stroller seat 50 and is rotatably connected to the bottom of the stroller seat 50. The stroller seat 50 can be adjusted to a forward, backward, or side-to-side seating state by rotating the seat 51. A foot lever 54 for supporting the leg of the child may be further provided on the rotary base 51. A footrest 211 for supporting the legs of a child seated in a rearward direction may be provided on the rear foot bar 21.

The sliding sleeve 52 is slidably sleeved on the front leg rod 11. Two ends of the support rod 53 are respectively hinged with the other end of the rotating seat 51 and the sliding sleeve 52. The support bar 53 can form a support triangle with the rotary seat 51 and the front leg bar 11 in the unfolded state of the frame, and can be completely unfolded with the rotary seat 51 and attached to the front leg bar 11 in the folded state of the frame. The matching structure of the rotating seat 51, the sliding sleeve 52 and the supporting rod 53 can stably and reliably support the baby carriage seat 50 in the unfolding state of the frame, and can be attached to the front foot rod 11 in the folding state of the frame, so that the space occupation after folding is reduced.

Referring to fig. 11-14, in some embodiments, the forefoot assembly 10 further includes: a fixed seat 14, a second slide block 15 and a third slide block 16. The fixed seat 14 is fixedly arranged in the front leg rod 11, the second sliding block 15 is arranged in the front leg rod 11 and is connected with the fixed seat 14 in a sliding manner, and the second sliding block 15 is provided with a first end which is contacted with the handle group 30 and a second end which is provided with a driving inclined surface 151. A third slider 16 is disposed in the front leg 11 and slidably connected to the fixed base 14, and the third slider 16 has a plug portion 161 and a wedge surface 162 contacting the driving slope 151 of the second slider 15.

In the unfolded state of the vehicle frame, the latch portion 161 of the third slider 16 extends out of the fixed seat 14 and is inserted into the through holes of the front leg bar 11 and the sliding sleeve 52, so as to lock the position of the sliding sleeve 52 on the front leg bar 11.

During the process of folding the frame from the unfolded state to the folded state, the second slider 15 is pushed to move by the rotation of the handlebar assembly 30, so that the latch portion 161 of the third slider 16 is retracted from the through hole on the front leg 11 and the sliding sleeve 52 through the wedge-shaped engagement of the driving inclined surface 151 of the second slider 15 and the wedge-shaped surface 162 of the third slider 16, thereby unlocking the position of the sliding sleeve 52 on the front leg 11. Thus, the sliding sleeve 52 is unlocked by rotating the handle set 30, and the rotary base 51 and the supporting rod 53 automatically flatten and attach to the front foot bar 11 under the action of their own gravity. Compared with the mode that the handle group, the front leg group and the rear leg group of the rotating seat and the frame are required to be respectively folded in the related technology, the folding process is simplified in the embodiment, the sliding sleeve is synchronously unlocked when the handle group is lifted to fold the handle group, the front leg group and the rear leg group of the frame, and the rotating seat and the supporting rod are automatically folded.

In order to more reliably unlock the sliding sleeve 52 by rotating the handlebar assembly 30, referring to fig. 11 and 12, in some embodiments, the front leg assembly 10 further includes: and a second elastic member 17. A second elastic member 17 is disposed between the fixed seat 14 and the second slider 15, and configured to maintain a first end of the second slider 15 in contact with the handle bar set 30.

The various embodiments of the frame described above in this disclosure may be applied to a stroller, and thus the present disclosure also provides stroller embodiments that include any of the frame embodiments described above.

Referring to fig. 1-14, the cooperation of the various components of an example frame from an extended position to a retracted position will now be described.

In the unfolded state of the frame, a user presses the unlocking key 39 on the handle 32 with a hand, the unlocking key 39 drives the locking element 39 to be separated from the locking position through the steel wire rope, and at the moment, the user pushes the handle 32 downwards to enable the telescopic inner rod 311 to retract into the telescopic outer rod 312 and drive the locking block 37 to move towards the handle joint 33.

The locking block 37 pushes the shifting block 37 to move towards the handlebar joint 33, the shifting block 37 pushes the rotating block 35 to rotate, and the rotation of the rotating block 35 drives the first sliding block 36 to retract inwards, so that the position for limiting the relative rotation between the front foot joint 13 and the handlebar joint 33 is separated.

Then, the user lifts the frame, so that the handle group and the front foot group rotate towards the rear foot group under the action of gravity to be close to each other. In the process, the handle joint 33 or the first slider 36 can abut against the second slider 15, so that the second slider 15 moves towards the front wheel set 13, the second elastic element 17 is compressed, and the latch portion 161 of the third slider 16 is driven by the driving inclined plane 151 to retract from the through holes on the front foot bar 11 and the sliding sleeve 52, thereby unlocking the sliding sleeve 52 on the front foot bar 11. The unlocking of the sliding sleeve 52 enables the rotating seat 51 and the supporting rod 53 to be flattened under the gravity, and the sliding sleeve 52 slides downwards along the front foot rod 11, so that the folding of the supporting structure of the baby carriage seat is realized.

When the handle set and the front leg set are close to the position close to the rear leg set, the rear leg rod and the rear wheel set in the rear leg set swing inwards relative to the rear leg cover under the action of self gravity, so that the distance between the two rear wheel sets is further reduced, and the folding state shown in fig. 6 is formed.

Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (13)

1. A vehicle frame, comprising:

the front foot group (10) comprises a front foot rod (11), a front wheel group (12) arranged at the lower end of the front foot rod (11) and a front foot joint (13) arranged at the upper end of the front foot rod (11);

the rear foot group (20) comprises two rear foot rods (21), two rear wheel groups (22) respectively arranged at the lower ends of the two rear foot rods (21) and two rear foot covers (23) respectively arranged at the upper ends of the two rear foot rods (21); and

a handle group (30) which comprises a handle rod (31), a handrail (32) arranged at the upper end of the handle rod (31) and a handle joint (33) arranged at the lower end of the handle rod (31),

the front foot joint (13), the two rear foot covers (23) and the handle joint (33) are coaxially connected through a joint shaft (40), the upper end of the rear foot rod (21) is hinged with the rear foot cover (23) on the same side through a hinge shaft (24), under the unfolding state and the folding state of the frame, the relative rotation angles of the front foot joint (13) and the rear foot cover (23) are different, so that different parts of the outer contour surface of the front foot joint (13) are in contact with the upper end of the rear foot rod (21), and the rear foot rod (21) swings to different angles relative to the rear foot cover (23).

2. Frame according to claim 1, characterized in that the outer contour surface of the forefoot joint (13) comprises a first outer contour surface (131) and a second outer contour surface (132), the distance of the first outer contour surface (131) to the rotation axis of the forefoot joint (13) being greater than the distance of the second outer contour surface (132) to the rotation axis of the forefoot joint (13);

in the unfolded state of the frame, the first outer contour surface (131) abuts against the upper end of the rear foot bar (21) so that the rear foot bar (21) swings outwards in the left-right direction of the frame, and the overall width of the two rear wheel sets (22) in the left-right direction of the frame is larger than the width of the front wheel set (12) in the left-right direction of the frame;

in a folded state of the frame, the second outer contour surface (132) abuts against the upper end of the rear foot bar (21) so that the rear foot bar (21) swings inward in the left-right direction of the frame, and the overall width of the two rear wheel sets (22) in the left-right direction of the frame is smaller than the width of the front wheel set (12) in the left-right direction of the frame.

3. Frame according to claim 2, characterized in that the axis of the hinge shaft (24) between the rear foot bar (21) and the rear foot cover (23) is perpendicular to the axis of the joint shaft (40).

4. The vehicle frame according to claim 2, wherein the first outer contour surface (131) and the second outer contour surface (132) are smoothly transitioned, and the first outer contour surface (131) is a circular arc shaped convex surface.

5. The frame according to claim 1, characterized in that the inner side of the rear foot cover (23) is provided with a first stop block (231) and a second stop block (232), the front foot joint (13) is provided with a third stop block (133), the handlebar set (30) further comprises a joint cover (34), the joint cover (34) is fixedly connected with the handlebar joint (33), the joint cover (34) is provided with a blocking groove (341), and the second stop block (232) is inserted in the blocking groove (341) and can slide in the blocking groove (341);

in the unfolded state of the frame, the first stop block (231) abuts against the third stop block (133) to limit the rear foot cover (23) to rotate relative to the front foot joint (13) in a first direction, and the second stop block (232) abuts against one side circumferential groove wall of the stop groove (341) to limit the rear foot cover (23) to rotate relative to the joint cover (34) in a second direction, wherein the second direction is opposite to the first direction;

in the process that the frame is folded from the unfolded state to the folded state, the joint cover (34) rotates relative to the rear foot cover (23) in the second direction, so that the blocking groove (341) slides relative to the second blocking block (232), and the limitation that the rear foot cover (23) rotates relative to the joint cover (34) in the second direction is released;

in the folded state of the frame, the first stop block (231) abuts against the third stop block (133) to limit the rear foot cover (23) to rotate in the second direction relative to the front foot joint (13), and the second stop block (232) abuts against the other side circumferential groove wall of the stop groove (341) to limit the rear foot cover (23) to rotate in the first direction relative to the joint cover (34).

6. The frame of claim 1, wherein the handlebar set (30) further comprises:

a rotating block (35) which is rotatably connected with the handle joint (33) through the joint shaft (40); and

a first slider (36) slidably disposed in the handlebar joint (33) and capable of extending and retracting with respect to the handlebar joint (33),

wherein, in the unfolded state of the frame, the first sliding block (36) extends out from the handlebar joint (33) and is abutted against the front foot joint (13) so as to limit the relative rotation between the front foot joint (13) and the handlebar joint (33);

when the frame is folded from the unfolded state to the folded state, the rotating block (35) is rotated to drive the first sliding block (36) to retract into the handle joint (33), so that the limitation of the relative rotation between the front foot joint (13) and the handle joint (33) is released.

7. The frame of claim 6, wherein the handlebar set (30) further comprises:

a locking block (37) lockably disposed within the handle bar (31);

the shifting block (38) is arranged in the handle joint (33), and a first end of the shifting block (38) abuts against the rotating block (35) and a second end abuts against the locking block (37); and

an unlocking key (39) arranged on the handle rod (31) and connected with the locking block (37) through a locking element (391), and configured to enable the locking element (391) to be separated from a position for locking the locking block (37) relative to the handle rod (31) after being subjected to an external force, so that the locking block (37) pushes the shifting block (38) to move towards the rotating block (35).

8. The vehicle frame according to claim 7, wherein the rotating block (35) is provided with a first guide sliding groove (351) positioned on one side of the joint shaft (40) far away from the shifting block (38), the first sliding block (36) is provided with a pin hole (361) and a second guide sliding groove (362), the handle bar group (30) further comprises a pin rod (392) penetrating through the first guide sliding groove (351) and the pin hole (361), the pin rod (392) and the first guide sliding groove (351) can slide relatively along the length direction of the first guide sliding groove (351), and the joint shaft (40) penetrates through the second guide sliding groove (362) and can slide along the length direction of the second guide sliding groove (362); during the rotation process of the rotating block (35), the first sliding block (36) is driven to extend or retract relative to the handlebar joint (33) through the pin rod (392).

9. The frame of claim 6, wherein the handlebar set (30) further comprises:

a first elastic member (393) provided between the first slider (36) and the handlebar joint (33) and configured to cause the first slider (36) to protrude outward with respect to the handlebar joint (33).

10. The vehicle frame of claim 1, further comprising:

a swivel (51) having one end hinged to the front foot joint (13), configured to support a stroller seat, and rotatably connected to the bottom of the stroller seat;

the sliding sleeve (52) is sleeved on the front foot rod (11) in a sliding manner; and

and the two ends of the supporting rod (53) are respectively hinged with the other end of the rotating seat (51) and the sliding sleeve (52), and the supporting rod is configured to form a supporting triangle between the rotating seat (51) and the front foot rod (11) in the unfolded state of the frame, and is completely unfolded and attached to the front foot rod (11) with the rotating seat (51) in the folded state of the frame.

11. The frame according to claim 10, characterized in that said front group of feet (10) further comprises:

the fixing seat (14) is fixedly arranged in the front foot rod (11);

the second sliding block (15) is arranged in the front foot rod (11) and is connected with the fixed seat (14) in a sliding mode, and the second sliding block (15) is provided with a first end which is in contact with the handle group (30) and a second end which is provided with a driving inclined plane (151); and

a third slider (16) disposed inside the front foot bar (11) and slidably connected to the fixing base (14), the third slider (16) having a plug portion (161) and a wedge surface (162) contacting the driving slope (151) of the second slider (15),

in the unfolded state of the frame, a plug pin part (161) of the third sliding block (16) extends out of the fixed seat (14) and is inserted into the through holes on the front foot rod (11) and the sliding sleeve (52) so as to lock the position of the sliding sleeve (52) on the front foot rod (11);

in the process of folding the frame from the unfolding state to the folding state, the second sliding block (15) is pushed to move by the rotation of the handle group (30), so that the plug pin part (161) of the third sliding block (16) retracts from the through holes on the front foot rod (11) and the sliding sleeve (52) through the wedge-shaped matching of the driving inclined plane (151) of the second sliding block (15) and the wedge-shaped surface (162) of the third sliding block (16), and the position of the sliding sleeve (52) on the front foot rod (11) is unlocked.

12. The frame according to claim 11, characterized in that said front group of feet (10) further comprises:

a second elastic member (17) disposed between the fixed seat (14) and the second slider (15) and configured to maintain a first end of the second slider (15) in contact with the handle bar group (30).

13. A stroller, comprising:

a vehicle frame as claimed in any one of claims 1 to 12.

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