CN209938703U - Baby carriage frame and baby carriage - Google Patents

Abstract

The present disclosure relates to a stroller frame and a stroller. The baby carriage frame includes: preceding foot pole, back foot pole, seat structure, handle pole, preceding wheelset, rear wheel group, receipts are closed structure and linkage structure, preceding wheelset sets up the first end of preceding foot pole, the rear wheel group sets up the first end of back foot pole, the seat structure with the handle pole is connected, receive close the structure with the second end of preceding foot pole the second end of back foot pole with the handle pole is all connected for realize the second end of preceding foot pole the second end of back foot pole with rotation between the handle pole is connected, linkage structure sets up the seat structure preceding foot pole with between the back foot pole, be used for the seat structure by the handle pole drives orientation during preceding foot pole motion, drive preceding foot pole with back foot pole is folding in opposite directions. The disclosed embodiment can make the folding operation of the baby carriage more convenient.

Description

Baby carriage frame and baby carriage

Technical Field

The present disclosure relates to the field of strollers, and more particularly, to a stroller frame and a stroller.

Background

A stroller is a tool vehicle designed to facilitate outdoor activities of a baby. In order to be convenient to carry and save storage space, the foldable baby carriage becomes the mainstream in the market at present. Some current collapsible perambulator when carrying out folding operation, need the operator to push the structure on the perambulator frame with strength with both hands when the unblock to accomplish folding action, not only harder, be difficult to accomplish alone folding when embracing the baby moreover. In addition, the multiple parts of some foldable strollers require the operator to fold separately when folding, which is time consuming and labor intensive.

Disclosure of Invention

In view of this, the disclosed embodiments provide a stroller frame and a stroller, which can facilitate the folding operation of the stroller.

In one aspect of the present disclosure, there is provided a stroller frame comprising: preceding foot pole, back foot pole, seat structure, handle pole, preceding wheelset, rear wheel group, receipts are closed structure and linkage structure, preceding wheelset sets up the first end of preceding foot pole, the rear wheel group sets up the first end of back foot pole, the seat structure with the handle pole is connected, receive close the structure with the second end of preceding foot pole the second end of back foot pole with the handle pole is all connected for realize the second end of preceding foot pole the second end of back foot pole with rotation between the handle pole is connected, linkage structure sets up the seat structure preceding foot pole with between the back foot pole, be used for the seat structure by the handle pole drives orientation during preceding foot pole motion, drive preceding foot pole with back foot pole is folding in opposite directions.

In some embodiments, the seating structure comprises: the side armrest comprises at least two side armrest rod sections which are connected, the two ends of the side armrest rod are respectively connected with the seat rod and the handle rod, and the handle rod and the front foot rod can be driven to be mutually folded when being folded in opposite directions.

In some embodiments, the seating structure further comprises: the backrest rod is rotatably connected with the seat rod and is connected with the handle rod or the side armrest rod, and the backrest rod and the seat rod can be oppositely folded or reversely unfolded by rotating relative to the seat rod under the drive of the handle rod or the side armrest rod.

In some embodiments, the linkage structure comprises: the sliding sleeve is sleeved on the front foot rod and connected with the seat structure and/or the rear foot rod through the connecting piece, and can move along the front foot rod to the front wheel set and drive the seat structure and/or the rear foot rod to the front foot rod to be folded through the connecting piece.

In some embodiments, the linkage structure further comprises: seat bracing piece and back foot bracing piece, the both ends of seat bracing piece respectively with the seat structure with the sliding sleeve rotationally connects, the both ends of back foot bracing piece respectively with the sliding sleeve with back foot pole rotationally connects, the seat bracing piece conduct the seat structure with connecting piece between the sliding sleeve can drive the seat structure is to being close to folding or to keeping away from in preceding foot pole one side expandes, back foot bracing piece conduct back foot pole with connecting piece between the sliding sleeve can drive back foot pole is to being close to folding or to keeping away from in preceding foot pole one side expandes.

In some embodiments, the front foot bar is a double-bar structure, the sliding sleeves include paired sliding sleeves respectively sleeved on the double-bar structure, and the seat support bar and the rear foot support bar are both pivoted between the paired sliding sleeves.

In some embodiments, the rear foot bars include a first rear foot bar and a second rear foot bar respectively connected to two sets of rear wheels of the rear wheel set, and the rear foot support bars include a cross bar and a connecting bar, the cross bar is rotatably connected between the first rear foot bar and the second rear foot bar, and the connecting bar is connected between the sliding sleeve and the cross bar.

In some embodiments, the folding structure comprises: the foldable seat body, the handle seat body and the rear foot seat body are connected, and rotatably mounted on the foldable seat body; the stroller frame further comprises: the handle comprises a folding base body and a handle base body, wherein the folding base body is arranged on the handle rod, the handle base body is provided with a first locking mechanism and a second locking mechanism, the first locking mechanism is arranged between the folding base body and the handle base body and used for keeping the relative fixed relation of the folding base body and the handle base body at a first locking position, the second locking mechanism is arranged on the handle rod and connected with the first locking mechanism through a first pull rope and used for enabling the first locking mechanism to move from the first locking position to a first unlocking position when being triggered externally, so that the handle base body can rotate relative to the folding base body.

In some embodiments, the handlebar stem includes a handlebar upper tube, a handlebar lower tube and a rotation joint disposed between the handlebar upper tube and the handlebar lower tube, the handlebar lower tube is connected to the handlebar seat body and rotatably mounted on the folding seat body, and the unlocking structure includes: joint locking mechanical system, unlocking key and linkage unlocking piece, joint locking mechanical system sets up rotate on the joint, can lock the hand (hold) top tube with rotational position between the hand (hold) low tube, the unlocking key position in the hand (hold) top tube can make when receiving external trigger joint locking mechanical system unblock, the linkage unlocking piece sets up rotate on the joint, and with first stay cord is connected, can be in when the hand (hold) top tube rotates to preset angular position for the hand (hold) low tube, through first stay cord makes first locking mechanical system follows first locking position moves first unblock position.

In some embodiments, the first locking mechanism includes a tooth-shaped member and a first spring, the retracting seat and the handle seat are both provided with a tooth-shaped structure capable of meshing with the tooth-shaped member, the tooth-shaped member and the first spring are both disposed between the retracting seat and the handle seat, the tooth-shaped member is connected to the first pulling rope, and is capable of reaching the first unlocking position under the pulling of the first pulling rope and disengaging from the meshing with the tooth-shaped structure of the retracting seat, and the tooth-shaped member is also capable of returning to the first locking position under the action of the first spring and simultaneously meshing with the tooth-shaped structures of the retracting seat and the handle seat.

In some embodiments, the foldable seat is fixedly connected to the front foot bar, and the stroller frame further includes a second locking mechanism disposed on the foldable seat and capable of locking a position of the linkage structure relative to the front foot bar in a second locking position and releasing a movement restriction of the linkage structure relative to the front foot bar in a second unlocking position.

In some embodiments, the linkage structure includes a sliding sleeve sleeved on the front leg rod, the sliding sleeve is connected with the seat structure and/or the rear leg rod through a connector, can move along the front leg rod to the front wheel set, and drives the seat structure and/or the rear leg rod to fold towards the front leg rod through the connector; the second locking mechanism comprises a first hook body, a second hook body and a linkage part, the second hook body is fixed on one side, adjacent to the folding seat body, of the sliding sleeve, the first hook body is arranged on the folding seat body and provided with a hook head part matched with the second hook body, and the linkage part is connected with the handle seat body and connected with the first hook body through a second pull rope; the linkage component can drive the hook head part of the first hook body to be separated from the hooking position of the second hook body through the second pull rope when the handle seat body rotates relative to the folding seat body by a preset angle.

In some embodiments, the folding structure further includes a folding elastic assisting structure disposed between the handle base and the rear foot base for providing a driving force for relative twisting between the handle base and the rear foot base when the first locking mechanism is located at the first unlocking position, so as to assist the handle bar and the rear foot bar to be folded towards each other.

In some embodiments, the retracting elastic assisting structure includes a protrusion and a torsion spring, the protrusion is disposed outside the sleeve connection member between the rear foot seat and the rear foot rod, one end of the torsion spring is fixedly connected with the handle seat, and the other end of the torsion spring abuts against or is connected to the protrusion.

In one aspect of the present disclosure, a stroller is provided comprising the stroller frame described above.

Therefore, according to the embodiment of the disclosure, the folding structure is arranged to realize the rotary connection among the front foot rod, the rear foot rod and the handle rod, and the linkage structure drives the front foot rod and the rear foot rod to be folded oppositely when the seat structure is driven by the handle rod to move towards the front foot rod, so that the user can operate more conveniently during folding the baby carriage, and time and labor are saved.

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 one embodiment of a stroller frame according to the present disclosure;

FIG. 2 is a schematic view of the embodiment of FIG. 1 at a lateral angle;

FIG. 3 is an enlarged view of a portion of the embodiment of FIG. 1;

FIG. 4 is an exploded view of a linkage structure according to one embodiment of the stroller frame of the present disclosure;

fig. 5 is an exploded view of a collapsible structure according to an embodiment of the stroller frame of the present disclosure;

fig. 6 is a cross-sectional view of a collapsible structure according to an embodiment of the stroller frame of the present disclosure;

fig. 7 is an exploded view of a collapsible structure of an embodiment of a stroller frame according to the present disclosure from another perspective;

fig. 8 and 9 are schematic structural views of a foldable structure of an embodiment of the stroller frame of the present disclosure in different cross sections;

fig. 10 (a) - (e) are schematic views respectively illustrating the process of gradually folding the stroller frame according to the embodiment of the present disclosure from the unfolded state.

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.

As shown in fig. 1, is a schematic structural view of an embodiment of a stroller frame according to the present disclosure. Referring to fig. 1, in combination with fig. 2-9, in some embodiments, a stroller frame includes: a front foot rod 1, a rear foot rod 2, a seat structure 3, a handle rod 4, a front wheel set 5, a rear wheel set 6, a folding structure 7 and a linkage structure 8. The front foot rod 1, the rear foot rod 2, the handle rod 4 and other various rod pieces can adopt solid rod structures or hollow tube structures. The front wheel set 5 is arranged at a first end of the front foot bar 1 (i.e. the end of the front foot bar close to the ground in fig. 1), and the rear wheel set 6 is arranged at a first end of the rear foot bar 2 (i.e. the end of the rear foot bar close to the ground in fig. 1).

The seat structure 3 is connected to the handlebar 4. When the handle bar 4 is forced to rotate, the seat structure 3 can be driven to rotate correspondingly. The folding structure 7 is connected with the second end of the front foot rod 1, the second end of the rear foot rod 2 and the handle rod 4, and is used for realizing the rotating connection among the second end of the front foot rod 1, the second end of the rear foot rod 2 and the handle rod 4. The linkage structure 8 is arranged between the seat structure 3, the front foot bar 1 and the rear foot bar 2. The linkage structure 8 can drive the front foot rod 1 and the rear foot rod 2 to be folded oppositely when the seat structure 3 is driven by the handle rod 4 to move towards the front foot rod 1. Like this, the operator can be through the mode to the handle pole application of force for seat structure, preceding foot pole and back foot pole fold together, thereby labour saving and time saving, it is more convenient to use.

Referring to fig. 1 and 2, in some embodiments, the seat structure 3 includes side bar rods 31 and seat rods 32. The seat post 32 may be used to carry the weight of the baby riding in the stroller. The side grab bar 31 comprises at least two side grab bar sections 31a, 32b connected with each other, the two ends of the side grab bar 31 are respectively connected with the seat bar 32 and the handle bar 4, and the handle bar 4 can drive the at least two side grab bar sections 31a, 32b to be folded with each other when the front foot bar 1 is folded in opposite directions. In fig. 3, the side arm sections 31a and 32b are hinged to each other at one end and to the handle bar 4 and the seat bar 32, respectively, at the other end.

The side grab bar 31 may be on one side of the stroller frame (e.g. left or right side, where the orientation of the front foot bar is referred to as forward) or on both the left and right sides of the stroller frame. The side grab bar 31 can protect the infant seated in the stroller on both left and right sides and can also be used for the infant to grasp to stabilize the body. The side handrail rod section adopting the multi-section connecting structure can enable the side handrail rod to be folded and retracted, and the occupied space size is reduced.

In some embodiments, the seat bar 32 may be composed of a plurality of bars (solid or hollow), for example, in fig. 3, the seat bar 32 includes two longitudinal bars extending in the front-rear direction and two transverse bars extending in the left-right direction connected between the two longitudinal bars. One end of each of the two longitudinal rod pieces is pivoted with the handle rod 4, and the other end of each of the two longitudinal rod pieces is a free end which can be set to be adjustable in length as required.

Referring to fig. 1-3, in some embodiments, the seat structure 3 further includes a back rest bar 33. The back rest lever 33 is rotatably connected to the seat lever 32 and is connected to the handle bar 4 or the side bar 31. The back rest rod 33 can rotate relative to the seat rod 32 under the driving of the handle rod 4, or when the handle rod 4 drives the side grab bar 31 to fold, the side grab bar 31 drives the back rest rod 33 to move, thereby realizing the folding or reverse unfolding of the back rest rod 33 and the seat rod 32. In addition to that, referring to fig. 1-3, the seat structure 3 may also include a front grab bar 34 for grasping by a baby riding in the stroller and on which a front table may be provided as desired.

Referring to fig. 3 and 4, in some embodiments, the linkage 8 includes a sliding sleeve 81. The sliding sleeve 81 cover is established on the preceding foot pole 1, and with seat structure 3 and/or connect through the connecting piece between the back foot pole 2, can follow preceding foot pole 1 to preceding wheelset 5 removes, and through the connecting piece drives seat structure 3 and/or back foot pole 2 to preceding foot pole 1 is folding. Thus, the frame of the baby carriage can be designed to drive either one of the seat structure 3 and the rear foot bar 2 to rotate relative to the front foot bar 1 according to the use requirement, and then the other one can be driven to rotate relative to the front foot bar 1, so that the seat structure 3 and the rear foot bar 2 can be folded oppositely or unfolded reversely.

In fig. 3, the linkage 8 further includes a seat support bar 82 and a rear foot support bar 83. The seat support rod 82 is rotatably connected at both ends thereof to the seat structure 3 and the sliding sleeve 81, respectively. The seat support rod 82 can be used as a connecting piece between the seat structure 3 and the sliding sleeve 81, so that the stable supporting effect of the seat structure 3 on the front foot rod 1 can be realized, and the seat structure 3 can be driven to be folded towards one side close to the front foot rod 1 or be unfolded towards one side far away from the front foot rod 1. The two ends of the rear foot supporting rod 83 are respectively connected with the sliding sleeve 81 and the rear foot rod 2 in a rotatable way. The back foot bracing piece 83 can be regarded as back foot pole 2 with connecting piece between the sliding sleeve 81 can realize the stable supporting effect between the front and back foot pole, can also drive back foot pole 2 is to being close to preceding foot pole 1 one side is folding or to keeping away from preceding foot pole 1 one side expandes.

Referring to fig. 4, in some embodiments, it is preferable that the front leg bar 1 is a dual-bar structure, that is, the front leg bar 1 includes two front leg bars 1a and 1b which are closely spaced and arranged in parallel, and correspondingly, the sliding sleeve 81 may include a pair of sliding sleeves 81a and 81b which are respectively sleeved on the dual-bar structure. A pivot may be provided between the sliding sleeves 81a and 81b, and the seat support bar 82 and the rear foot support bar 83 may be pivotally connected to the pivot between the pair of sliding sleeves 81a, 81 b. The front leg bar 1 of this dual bar structure has a greater load bearing capacity, and the seat support bar 82 and the rear leg support bar 83 are pivotally connected between the pair of sliding sleeves, so that the support of the seat structure 3 relative to the front leg bar 1 and the support between the front and rear leg bars can be more stable.

The front and rear caster sets need to form a certain supporting area on the ground to ensure that the center of gravity of the stroller falls within the supporting area to prevent the stroller from tipping over. Accordingly, it is preferable that the rear foot bar 2 includes a first rear foot bar 2a and a second rear foot bar 2b that are respectively connected to two sets of rear wheels of the rear wheel group 6. The first and second rear legs 2a and 2b may be provided with a width, for example, 30 to 50 cm, etc., as required. In order for the rear foot support bars to better support the rear foot bars, in some embodiments, the rear foot support bars 83 include a cross bar 83b and a connecting bar 83 a. The cross bar 83b is rotatably connected between the first rear leg 2a and the second rear leg 2b, and the connecting bar 83a is connected between the sliding sleeve 81 and the cross bar 83 b. The connecting rod 83a is preferably connected at the center of the cross bar 83b to make the supporting force more balanced. The connecting rod 83a may be provided in one or more as required.

Referring to fig. 4-6, in some embodiments, the folding structure 7 includes: a folding seat body 71, a handle seat body 72 and a rear foot seat body 73. The handle seat 72 is connected to the handle rod 4 and is rotatably mounted on the folding seat 71. The rear foot seat 73 is connected to the rear foot rod 2 and is rotatably mounted on the folding seat 71.

Referring to fig. 1, the handle bar 4 includes a handle upper tube 43, a handle lower tube 41, and a rotary joint 42 provided between the handle upper tube 43 and the handle lower tube 41. The handle lower tube 41 is connected to the handle base 72 and is rotatably mounted on the folding base 71. The foldable base 71 may include two sets of internal cavities, wherein the internal cavity matched with the handle base 72 is a first internal cavity 71a, and the internal cavity matched with the rear foot base 73 is a second internal cavity 71 b. The handle holder body 72 may be provided in a multi-segment configuration as exemplified in fig. 5 and 6, including a first diameter segment sized to match the inner diameter of the first interior chamber 71a and a second diameter segment sized to match the cross-sectional size of the handle down tube 41, with a transition segment of gradually varying diameter size between the first diameter segment and the second diameter segment.

In order to connect the handle lower tube 41 and the handle base body 72, a sleeve connector 72a may be provided, the sleeve connector 72a may be provided with a connecting hole, and both the second diameter section of the handle base body 72 and the end of the handle lower tube 41 may be provided with a connecting hole, so that the second diameter section of the handle base body 72 and the end of the handle lower tube 41 are connected through the sleeve connector 72a and the screw 72e (or a pin, etc.).

In fig. 2 and 3, the handle bar 4 may further include a ceiling frame 44 and a folding fixture 45. The canopy frame 44 may be used for mounting to the roof of a stroller and may be deployed to shade a stroller from sunlight. The folding fixing member 45 can be used for fixing the folded state of the frame by matching with the fixing structure on the rear foot bar after the whole frame is folded.

Referring to fig. 5 and 6, the rear foot seat 73 may be provided in a multi-segment structure as exemplified in fig. 5 and 6, including a support segment sized to match the inner diameter of the second interior chamber 71b and having a plurality of annular or spiral grooves and a connecting segment for connection with the rear foot bar 2. The periphery of the connecting section can also be provided with an annular groove or a spiral groove, and the section size of the connecting section can be smaller than that of the supporting section, so that the mounting is convenient.

In order to connect the rear leg shaft 2 to the rear leg base 73, a sleeve connector 73a may be provided. The spigot connector 73a can have a non-circular cavity and mate with the outer profile of the connecting section of the rear foot block 73. The sleeve connector 73a can be provided with a connecting hole, and the connecting section of the rear foot seat body 73 and the end part of the rear foot rod 2 can be provided with a connecting hole, so that the connecting section of the rear foot seat body 73 and the end part of the rear foot rod 2 are connected through the sleeve connector 73a and the screw 73b (or a pin shaft and the like). This makes it possible, on the one hand, to limit the relative axial position of the bushing connection 73a, the rear foot body 73 and the rear foot bar 2, and, on the other hand, to achieve a circumferentially opposite torque transmission by the contour fit of the bushing connection 73a and the rear foot body 73 and the connection of the threaded spindle 73 b. The end of the sleeve connector 73a adjacent to the folding seat 71 is larger than the second inner chamber 72a, so that the limitation of the transverse movement range of the rear foot seat 73 can be realized.

To maintain the stability of the stroller frame in the unfolded state and to enable convenient folding, in some embodiments, the stroller frame further comprises a first locking mechanism and an unlocking structure. A first locking mechanism may be disposed between the foldable seat 71 and the handle seat 72, and is configured to maintain the foldable seat 71 and the handle seat 72 in a relatively fixed relationship at a first locking position. The unlocking structure may be disposed on the handle bar 4, and is connected to the first locking mechanism through a first pull rope 93, so that when triggered by the outside, the first locking mechanism moves from the first locking position to the first unlocking position, so that the handle seat 72 can rotate relative to the folding seat 71.

For ease of understanding, referring to fig. 5 and 6, the first locking mechanism includes a tooth 91 and a first spring 92. The folding seat body 71 and the handle seat body 72 are both provided with a tooth-shaped structure capable of meshing with the tooth-shaped member 91. The tooth 91 and the first spring 92 are disposed between the folding seat 71 and the handle seat 72. The tooth 91 is connected to the first cord 93, and can reach the first unlock position by pulling the first cord 93. In the first unlocking position, the tooth 91 is disengaged from the tooth structure of the folding seat 71. Thus, the handle holder 72 can rotate relative to the foldable holder 71. The tooth 91 is also able to return to the first locking position under the action of the first spring 92. In the first locking position, the tooth 91 is engaged with the tooth structures of the foldable seat 71 and the handle seat 72 simultaneously. Thus, the handle seat 72 and the folding seat 71 are fixed in the circumferential direction and cannot rotate relative to each other.

The teeth 91 may be gears, or may be regular or irregular parts having a tooth shape. The tooth-shaped structures in the foldable seat 71 and the handle seat 72 may be gear inner rings or cavities with tooth-shaped inner profiles respectively arranged on the foldable seat 71 and the handle seat 72.

In some embodiments, the unlocking structure may include a joint locking mechanism, an unlocking key, and a linked unlocking piece. The joint lock mechanism may be provided on the rotational joint 42, and may lock a rotational position between the handlebar upper tube 43 and the handlebar lower tube 41. The release key is located on the handle top tube 43, for example, at the top middle position of the handle top tube 43, for convenient operation by the user. An unlocking key is capable of unlocking the joint locking mechanism when externally triggered. The linkage unlocking member is provided on the rotary joint 42, is connected to the first pull rope 93, and is configured to move the first locking mechanism from the first locking position to the first unlocking position through the first pull rope 93 when the handle upper tube 43 is rotated to a predetermined angular position with respect to the handle lower tube 41. For example, the unlocking key is used to unlock the joint locking mechanism, and then the handle upper tube 43 is rotated backward until it approaches the handle lower tube 41, at which time the linkage unlocking member drives the first rope 93 to move in a direction away from the folding base 71 along with the rotation of the handle upper tube 43. The first pulling rope 93 can further drive the tooth 91 to move away from the folding base 71 until the first unlocking position, and at this time, the handle lower tube 41 can rotate relative to the folding base 71, thereby realizing further folding.

In order to ensure a stable supporting relationship between the front leg bar 1 and the rear leg bar 2 in the unfolded state of the frame, in some embodiments, the foldable seat body 71 is fixedly connected to the front leg bar 1. The stroller frame further comprises a second locking mechanism disposed on the foldable seat 71 and capable of locking the position of the linkage structure 8 relative to the front foot bar 1 at a second locking position and releasing the movement restriction of the linkage structure 8 relative to the front foot bar 1 at a second unlocking position. The second locking mechanism can further stably support the seat structure 3 and the rear foot bar 2 by the seat support bar 82 and the rear foot support bar 83, respectively, by locking the position of the interlocking structure 8 with respect to the front foot bar 1 at the second locking position. When the second locking mechanism is adjusted to the second unlocking position, the movement of the linkage structure 8 relative to the front foot bar 1 is no longer limited, so that the folding among the seat structure 3, the front foot bar 1 and the rear foot bar 2 can be realized.

Referring to fig. 7-9, in some embodiments, the second locking mechanism includes a first hook 96, a second hook 97, and a linkage 94, wherein the second hook 97 is fixed to a side of the sliding sleeve 81 adjacent to the folding seat 71. The first hook 96 is disposed on the foldable seat 71 and has a hook head portion engaged with the second hook 97. The linkage member 94 is connected to the handle base 72 and to the first hook 96 via a second pull cord 95. The linkage member 94 can drive the hook head of the first hook 96 to be separated from the hooking position of the second hook 97 through the second pull rope 95 when the handle seat 72 rotates a preset angle relative to the folding seat 71.

In fig. 7, the middle of the linkage member 94 is pivotally connected to the outside of the folding seat 71, and a through hole 71d is formed in the folding seat 71, such that one end of the linkage member 94 is inserted into the through hole 71d and is rotatably connected or abutted to the handle seat 72, and the other end is connected to one end of the second pull rope 95, such that when the handle seat 72 rotates relative to the folding seat 71, the linkage member 94 is driven to rotate around the pivot, and the second pull rope 95 is driven to move to pull the first hook 96. An outer shell 71e may be disposed outside the linkage member 94 and mounted on the outer wall of the folding seat body 71 by screws or bolts.

The middle portion of the first hook 96 can be pivoted to an end of the foldable base 71 adjacent to the sliding sleeve 81, and the hook head portion of the first hook 96 can extend outward relative to the foldable base 71 and can be hooked to the second hook 97 disposed between the pair of sliding sleeves 81a and 81 b. A torsion spring 97 may be further provided to the first hook 96 so that the first hook 96 maintains a position where the second hook 97 is hooked as much as possible. When the first hook 96 is pulled by the second cord 95 against the elastic force of the torsion spring 97, the hook head portion of the first hook 96 can be disengaged from the hooking position of the second hook 97. When the second pulling rope 95 is loosened, the first hook 96 is returned to the position where it hooks the second hook 97 by the torsion spring 97. An outer shell 71f can be disposed outside the first hook 96 and is mounted on the outer wall of the folding seat 71 by screws or bolts.

Referring to fig. 5 and 6, in some embodiments, the folding structure 7 further includes a folding elastic assisting structure. The folding elastic assisting structure is arranged between the handle seat body 72 and the rear foot seat body 73 and used for providing a driving force for relative torsion between the handle seat body 72 and the rear foot seat body 73 when the first locking mechanism is positioned at the first unlocking position so as to assist the handle rod 4 and the rear foot rod 2 to be folded oppositely.

In fig. 5, the retracting resilient force-assisting structure may include a protrusion 73c and a torsion spring 72 d. The projection 73c is arranged outside the sleeve connecting piece 73a between the rear foot seat body 73 and the rear foot rod 2, one end of the torsion spring 72d is fixedly connected with the handle seat body 72, and the other end of the torsion spring is abutted against or connected to the projection 73 c. Thus, the handle base 72 connected to the handle bar 4 tends to be folded relative to the rear foot base 73 connected to the rear foot bar 2 by the torsion spring 72d, so that the user can more easily fold the frame.

In addition, the side of the sleeve connector 72a adjacent to the sleeve connector 73a in fig. 5 is further provided with a raised baffle 72f which can be in abutting engagement with a stepped surface on the sleeve connector 73a, so that the axial position of the sleeve connector 72a is limited by the sleeve connector 73 a. A protrusion structure 72g is also provided at a position of the sleeve connector 72a corresponding to the protrusion 73c, and the protrusion structure 72g can restrict the rotation direction of the protrusion 73 by blocking the protrusion 73 so that it cannot be folded reversely.

The stroller frame embodiments described above can be applied to various strollers, and therefore the present disclosure also provides a stroller including any of the stroller frame embodiments described above, which is more convenient for the parents to operate in folding and folding.

An example of the process of folding the stroller frame will be described with reference to fig. 10 (a) - (e).

In fig. 10 (a), when the stroller is folded, the user can press the unlocking key on the handle upper tube with the palm or fingers to unlock the joint lock mechanism on the joint of the handle bar, and then press the handle upper tube downward in the direction of the arrow in fig. 10 (a) to rotate the handle upper tube to the position shown in fig. 10 (b). At this time, the locking between the handle housing and the folding housing is released, and the user can fold the handle lower tube forward in the arrow direction in fig. 10 (b). At this time, both the seat bar and the back bar are folded forward, and the two side bar sections of the side bars are folded each other, and the front leg bar and the rear leg bar can still maintain the same stable support angle as that of the unfolded state of the frame.

As the handle lower tube continues to be folded forward in the direction of the arrow, the second locking mechanism gradually reaches the unlocked position as the folding progresses. At this time, the hook head of the first hook body is separated from the hooking position of the second hook body, so that the sliding sleeve moves along the front foot rod to the front wheel set along with the folding process, and drives the seat rod and the rear foot rod to be close to the front foot rod and reach the position (d) of fig. 10. At this time, the handle bar, the seat bar, the back bar, the front leg bar and the rear leg bar are gradually folded to one side, and are continuously folded to the position (e) in fig. 10, and then the relative positions of the rear leg bar and the handle bar can be fixed by the folding fixing member.

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 (15)

1. A stroller frame, comprising: a front foot bar (1), a rear foot bar (2), a seat structure (3), a handlebar bar (4), a front wheel set (5), a rear wheel set (6), a folding structure (7) and a linkage structure (8), wherein the front wheel set (5) is arranged at a first end of the front foot bar (1), the rear wheel set (6) is arranged at a first end of the rear foot bar (2), the seat structure (3) is connected with the handlebar bar (4), the folding structure (7) is connected with a second end of the front foot bar (1), a second end of the rear foot bar (2) and the handlebar bar (4) for realizing the rotational connection between the second end of the front foot bar (1), the second end of the rear foot bar (2) and the handlebar bar (4), the linkage structure (8) is arranged between the seat structure (3), the front foot bar (1) and the rear foot bar (2), is used for driving the front foot rod (1) and the rear foot rod (2) to be folded oppositely when the seat structure (3) is driven by the handle rod (4) to move towards the front foot rod (1).

2. Baby carriage frame according to claim 1, characterized in that the seat structure (3) comprises: side grab bar (31) and seat pole (32), side grab bar (31) include at least two continuous side grab bar sections (31a, 32b), the both ends of side grab bar (31) respectively with seat pole (32) with handle pole (4) are connected, can handle pole (4) with during preceding foot pole (1) is folding in opposite directions, drive at least two side grab bar sections (31a, 32b) are folding each other.

3. Baby carriage frame according to claim 2, characterized in that the seat structure (3) further comprises: the backrest rod (33) is rotatably connected with the seat rod (32), is connected with the handle rod (4) or the side grab rail (31), and can rotate relative to the seat rod (32) under the driving of the handle rod (4) or the side grab rail (31) so as to realize that the backrest rod (33) and the seat rod (32) are folded or unfolded oppositely.

4. Baby carriage frame according to claim 1, characterized in that the linkage structure (8) comprises: sliding sleeve (81), the cover is established on preceding foot pole (1), and with seat structure (3) and/or connect through the connecting piece between back foot pole (2), can follow preceding foot pole (1) to preceding wheelset (5) remove, and pass through the connecting piece drives seat structure (3) and/or back foot pole (2) to preceding foot pole (1) is folding.

5. The stroller frame according to claim 4, characterized in that the linkage structure (8) further comprises: a seat supporting rod (82) and a back foot supporting rod (83), wherein two ends of the seat supporting rod (82) are respectively rotatably connected with the seat structure (3) and the sliding sleeve (81), two ends of the rear foot supporting rod (83) are respectively rotatably connected with the sliding sleeve (81) and the rear foot rod (2), the seat supporting rod (82) is used as a connecting piece between the seat structure (3) and the sliding sleeve (81) and can drive the seat structure (3) to be folded towards one side close to the front foot rod (1) or unfolded towards one side far away from the front foot rod (1), back foot vaulting pole (83) are as back foot pole (2) with connecting piece between sliding sleeve (81) can drive back foot pole (2) are to being close to preceding foot pole (1) one side is folding or to keeping away from preceding foot pole (1) one side expandes.

6. The stroller frame according to claim 5, wherein the front foot bar (1) is of a double-bar structure, the sliding sleeve (81) comprises a pair of sliding sleeves (81a, 81b) respectively sleeved on the double-bar structure, and the seat support bar (82) and the rear foot support bar (83) are both pivoted between the pair of sliding sleeves (81a, 81 b).

7. The stroller frame according to claim 5, characterized in that the rear foot bar (2) comprises a first rear foot bar (2a) and a second rear foot bar (2b) connected to the two sets of rear wheels of the rear wheel set (6), respectively, the rear foot support bar (83) comprises a cross bar (83b) and a connecting bar (83a), the cross bar (83b) being rotatably connected between the first rear foot bar (2a) and the second rear foot bar (2b), the connecting bar (83a) being connected between the sliding sleeve (81) and the cross bar (83 b).

8. Baby carriage frame according to claim 1, characterized in that said folding structure (7) comprises: the folding seat body (71), the handle seat body (72) and the rear foot seat body (73), wherein the handle seat body (72) is connected with the handle rod (4) and is rotatably installed on the folding seat body (71), and the rear foot seat body (73) is connected with the rear foot rod (2) and is rotatably installed on the folding seat body (71); the stroller frame further comprises: the folding seat body (71) and the handle seat body (72) are arranged in a fixed relation, the folding seat body (71) and the handle seat body (72) are arranged at a first locking position, the unlocking structure is arranged on the handle rod (4) and connected with the first locking mechanism through a first pull rope (93), and the first locking mechanism moves from the first locking position to a first unlocking position when triggered by the outside, so that the handle seat body (72) can rotate relative to the folding seat body (71).

9. The stroller frame according to claim 8, wherein the handle bar (4) comprises a handle upper tube (43), a handle lower tube (41) and a rotation joint (42) disposed between the handle upper tube (43) and the handle lower tube (41), the handle lower tube (41) is connected to the handle seat body (72) and rotatably mounted on the folding seat body (71), and the unlocking structure comprises: joint locking mechanical system, unlock key and linkage unlock piece, joint locking mechanical system sets up rotate on the joint (42), can lock on hand (hold) top tube (43) with the rotational position between hand (hold) low tube (41), the unlock key is located hand (hold) top tube (43), can make when receiving external trigger the unblock of joint locking mechanical system, the linkage unlock piece sets up rotate on the joint (42), and with first stay cord (93) are connected, can when hand (hold) top tube (43) rotate to predetermineeing the angular position for hand (hold) low tube (41), through first stay cord (93) make first locking mechanical system is followed first locking position moves to first unlock position.

10. The stroller frame according to claim 8, characterized in that the first locking mechanism comprises a tooth (91) and a first spring (92), the folding seat body (71) and the handle seat body (72) are both provided with tooth-shaped structures which can be meshed with the tooth-shaped part (91), the tooth-shaped member (91) and the first spring (92) are both arranged between the folding seat body (71) and the handle seat body (72), the tooth (91) is connected to the first cord (93) and can reach the first unlocking position by being pulled by the first cord (93), and is disengaged from the tooth-shaped structure of the folding seat body (71), the tooth-shaped part (91) can be reset to the first locking position under the action of the first spring (92), and simultaneously meshed with the tooth-shaped structures of the folding seat body (71) and the handle seat body (72).

11. The stroller frame according to claim 8, wherein the foldable seat (71) is fixedly connected to the front foot bar (1), and the stroller frame further comprises a second locking mechanism disposed on the foldable seat (71) and capable of locking the position of the linkage structure (8) relative to the front foot bar (1) at a second locking position and releasing the movement restriction of the linkage structure (8) relative to the front foot bar (1) at a second unlocking position.

12. The stroller frame according to claim 11, wherein the linkage structure (8) comprises a sliding sleeve (81) sleeved on the front foot bar (1), the sliding sleeve (81) is connected with the seat structure (3) and/or the rear foot bar (2) through a connecting piece, can move along the front foot bar (1) to the front wheel set (5), and drives the seat structure (3) and/or the rear foot bar (2) to fold towards the front foot bar (1) through the connecting piece; the second locking mechanism comprises a first hook body (96), a second hook body (97) and a linkage part (94), the second hook body (97) is fixed on one side, adjacent to the folding seat body (71), of the sliding sleeve (81), the first hook body (96) is arranged on the folding seat body (71) and is provided with a hook head part matched with the second hook body (97), and the linkage part (94) is connected with the handle seat body (72) and is connected with the first hook body (96) through a second pull rope (95); the linkage component (94) can drive the hook head part of the first hook body (96) to be separated from the hooking position of the second hook body (97) through the second pull rope (95) when the handle seat body (72) rotates for a preset angle relative to the folding seat body (71).

13. The stroller frame according to claim 8, wherein the folding structure (7) further comprises a folding elastic force-assisting structure disposed between the handle seat (72) and the rear foot seat (73) for providing a driving force for relative twisting between the handle seat (72) and the rear foot seat (73) when the first locking mechanism is located at the first unlocking position, so as to assist the handle bar (4) and the rear foot bar (2) to be folded towards each other.

14. The stroller frame according to claim 13, wherein the folding elastic force-assisting structure comprises a projection (73c) and a torsion spring (72d), the projection (73c) is disposed outside the sleeve connector (73a) between the rear foot seat (73) and the rear foot rod (2), one end of the torsion spring (72d) is fixedly connected with the handle seat (72), and the other end abuts against or is connected to the projection (73 c).

15. A stroller comprising the stroller frame of any one of claims 1 to 14.

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