CN216969781U - Folding frame and baby carriage - Google Patents

Abstract

The utility model discloses a folding frame and a baby carriage, wherein the folding frame comprises: the front frame, the rear frame, the front connecting rod, the rear connecting rod, the upper connecting rod and the hand push rod. The rear frame is rotatably connected with the front frame; one end of the front connecting rod is rotationally connected with the front frame; one end of the rear connecting rod is rotatably connected with the other end of the front connecting rod, and the other end of the rear connecting rod is rotatably connected with the rear frame, so that the front frame, the rear frame, the front connecting rod and the rear connecting rod form a four-bar mechanism; one end of the upper connecting rod is rotationally connected with the front connecting rod and/or the rear connecting rod; the hand push rod is rotatably connected to the front frame and/or the rear frame, and the other end of the upper connecting rod is rotatably connected with the hand push rod, so that the four-bar mechanism and the hand push rod can be in linkage rotation with each other. Through the structure, when the folding frame is folded, the hand push rod is directly pressed down to enable the four-bar linkage mechanism to rotate, the front frame, the rear frame, the front connecting rod and the rear connecting rod can be folded in a linkage mode, the folding step is simple and efficient, quick folding can be achieved, and the folding frame is easy and convenient to operate.

Description

Folding frame and baby carriage

Technical Field

The utility model relates to the technical field of baby carriers, in particular to a folding frame and a baby carrier.

Background

The baby carriage is a tool for children to ride instead of walk. Current bassinet in the existing market, for convenient transportation and accomodate, most all have folding function, but the folding step of current bassinet is loaded down with trivial details, just can fold after need unblock a plurality of positions, and the operation is inconvenient, consequently needs to improve current bassinet.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a folding bicycle frame which can be folded quickly.

The utility model also provides a baby carriage comprising the folding frame.

According to a first aspect embodiment of the utility model, a folding chassis comprises: the front frame, the rear frame, the front connecting rod, the rear connecting rod, the upper connecting rod and the hand push rod. The rear frame is rotatably connected with the front frame; one end of the front connecting rod is rotatably connected with the front frame; one end of the rear connecting rod is rotatably connected with the other end of the front connecting rod, and the other end of the rear connecting rod is rotatably connected with the rear frame, so that the front frame, the rear frame, the front connecting rod and the rear connecting rod form a four-bar mechanism; one end of the upper connecting rod is rotationally connected with the front connecting rod and/or the rear connecting rod; the hand push rod is rotatably connected to the front frame and/or the rear frame, and the other end of the upper connecting rod is rotatably connected with the hand push rod, so that the four-bar mechanism and the hand push rod can rotate in a linkage mode.

The folding bicycle frame provided by the embodiment of the utility model at least has the following beneficial effects: through the structure, when the folding frame is folded, the hand push rod is directly pressed down to enable the four-bar linkage mechanism to rotate in a linkage mode, so that the front frame, the rear frame, the front connecting rod and the rear connecting rod can be folded in a linkage mode, the folding steps are simple and efficient, the rapid folding can be achieved, and the folding frame is easy and convenient to operate.

According to some embodiments of the utility model, a locking device is included, said locking device being capable of defining a deployment angle of said front frame relative to said rear frame.

According to some embodiments of the present invention, the locking device includes a connecting seat, a rotating member, and a locking assembly, the front frame is rotatably connected to the connecting seat, the rear frame is fixedly connected to the connecting seat, the rotating member is rotatably connected to the connecting seat, the connecting seat is provided with a guide groove and a locking groove communicated with the guide groove, the locking assembly includes a locking pin and a driving mechanism, the locking pin is movably disposed on the rotating member, and the driving mechanism can drive the locking pin to be clamped into the locking groove or separated from the locking groove and enter the guide groove.

According to some embodiments of the utility model, the connection seat is provided with a step.

According to some embodiments of the utility model, the locking device further comprises a limiting mechanism, the limiting mechanism comprises a limiting block arranged on the front frame and a limiting groove arranged on the rotating part and matched with the limiting block, and the deployment angle of the front frame and the rotating part can be limited by the matching of the limiting block and the limiting groove.

According to some embodiments of the present invention, the driving mechanism includes a sliding member, a wedge block, and an elastic member, the sliding member is slidably disposed in the rotating member, the locking pin is disposed in the sliding member, the wedge block is slidably disposed in the rotating member and abuts against the sliding member, the elastic member is disposed between the sliding member and the rotating member and is capable of generating an elastic force acting on the sliding member to drive the locking pin to be locked into the locking groove, the sliding member is provided with a guiding surface, the wedge block is provided with a driving surface cooperating with the guiding surface, the push rod is capable of pushing the wedge block to move, and the driving surface and the guiding surface cooperate with each other to drive the sliding member to move against the elastic force, so that the locking pin is withdrawn from the locking groove.

According to some embodiments of the present invention, the hand push rod includes an outer sleeve and a telescopic rod, the outer sleeve is inserted into the rotating member, the telescopic rod is slidably connected to the outer sleeve and can be retracted and accommodated in the outer sleeve, and the telescopic rod can push the wedge block to drive the sliding member to move against the elastic force, so that the locking pin exits the locking groove.

According to some embodiments of the present invention, the handle bar is provided with an adjusting mechanism, the adjusting mechanism includes an elastic element, a clamping block and a bayonet matched with the clamping block, the bayonet has at least two bayonets provided on the outer loop bar, the clamping block is provided on the telescopic link and can be clamped in the bayonet, and the elastic element is provided between the clamping block and the telescopic link and can drive the clamping block to be clamped in the bayonet.

According to some embodiments of the utility model, a seat assembly is included, one end of the seat assembly being pivotally connected to the front frame and the other end of the seat assembly being connected to the front link by a linkage mechanism.

According to some embodiments of the utility model, the linkage mechanism includes a bracket and an extension arm extending from the front link, the bracket having one end pivotally connected to the extension arm and another end pivotally connected to the seat assembly.

According to some embodiments of the utility model, the seat assembly comprises a seat plate and a backrest, the seat plate is rotatably connected to the bracket at one end and the front frame at the other end, and the backrest is rotatably connected to the seat plate.

According to some embodiments of the utility model, the stroller is provided with a handle structure.

A stroller according to an embodiment of the second aspect of the utility model comprises a folding chassis according to the embodiment of the first aspect of the utility model described above.

The baby carriage provided by the embodiment of the utility model has at least the following beneficial effects: adopt the bassinet of above-mentioned first aspect embodiment folding chassis, during the use, can realize expandeing the bassinet fast or folding bassinet, folding operation is convenient fast, labour saving and time saving.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a cross-sectional view of a folding frame according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the folding frame A of the embodiment of the present invention shown in FIG. 1;

FIG. 3 is a partial exploded view of the folding frame of the present embodiment;

FIG. 4 is a schematic structural diagram of a connecting socket according to an embodiment of the present invention;

FIG. 5 is a partial cross-sectional view of a push rod in accordance with an embodiment of the present invention;

FIG. 6 is a partially enlarged view of a handle according to an embodiment of the present invention;

FIG. 7 is a schematic perspective view of a stroller according to an embodiment of the present invention in an unfolded state;

FIG. 8 is a partially folded perspective view of the stroller of an embodiment of the present invention;

fig. 9 is a perspective view of a fully folded stroller in accordance with an embodiment of the present invention.

Reference numerals:

the front frame 100, the limiting block 102, the rear frame 110, the front connecting rod 120, the extension arm 121, the rear connecting rod 130 and the upper connecting rod 140;

the connecting base 200, the guide groove 201, the locking groove 202, the pedal part 203, the rotating part 210, the locking pin 211, the limiting groove 212, the elastic part 220 and the hand ring 230;

a hand push rod 300, an outer sleeve rod 310 and an expansion rod 320;

a slide 400, a guide surface 401, a wedge 410, a drive surface 411;

the elastic element 500, the fixture block 510 and the bayonet 520;

seat plate 610, backrest 620, bracket 630.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, 2 and 3, a folding chassis according to an embodiment of the present invention includes: a front frame 100, a rear frame 110, a front link 120, a rear link 130, an upper link 140, and a handle bar 300. The rear frame 110 is rotatably connected with the front frame 100; one end of the front link 120 is rotatably connected to the front frame 100; one end of the rear connecting rod 130 is rotatably connected with the other end of the front connecting rod 120, and the other end of the rear connecting rod 130 is rotatably connected with the rear frame 110, so that the front frame 100, the rear frame 110, the front connecting rod 120 and the rear connecting rod 130 form a four-bar linkage; one end of the upper link 140 is rotatably connected with the front link 120 and/or the rear link 130; the handle bar 300 is rotatably connected to the front frame 100 and/or the rear frame 110, and the other end of the upper link 140 is rotatably connected to the handle bar 300, so that the four-bar linkage and the handle bar 300 can be rotated in conjunction with each other.

Through above-mentioned structure, have following beneficial effect at least: when the folding bicycle frame is folded, the hand push rod 300 is directly pressed downwards to enable the four-bar linkage mechanism to rotate in a linkage mode, the four-bar linkage mechanism formed by the front frame 100, the rear frame 110, the front connecting rod 120 and the rear connecting rod 130 can be folded in a linkage mode, the folding steps are simple and efficient, rapid folding can be achieved, and operation is simple and convenient.

Specifically, there are one set of the front frame 100 and two sets of the rear frame 110, and the front frame 100 is rotatably hinged to the two sets of the rear frame 110. The front connecting rods 120 are provided with one group, and the rear connecting rods 130 are provided with two groups corresponding to the rear frame 110 and are rotatably connected with the two groups of rear frames 110. The front link 120 has a left end rotatably connected to the front frame 100 and a right end rotatably connected to the two sets of rear links 130. The front frame 100, the rear frame 110, the front link 120, and the rear link 130 form a four-bar linkage. The upper links 140 are provided in two sets, one end of each of which is rotatably connected to the two sets of rear links 130, and the front link 120 is hinged to the rear link 130 and the upper link 140 at the same point. The other end of the upper link 140 is rotatably connected to the handle bar 300, and the handle bar 300 is linked to the four-bar linkage formed by the two sets of upper links 140 and the front frame 100, the rear frame 110, the front link 120, and the rear link 130. When the folding chair is used, the hand push rod 300 is directly driven, the front frame 100, the rear frame 110, the front connecting rod 120 and the rear connecting rod 130 can be folded in a follow-up mode, rapid folding can be achieved, the steps are simple and efficient, and operation is convenient and fast.

Referring to fig. 2 and 3, in some embodiments of the utility model, the swivel comprises a locking device capable of defining the deployment angle of the front frame 100 relative to the rear frame 110.

In particular, the locking means can define the deployment angle of the front frame 100 relative to the rear frame 110.

Referring to fig. 2, 3 and 4, in some embodiments of the present invention, the locking device includes a connecting base 200, a rotation member 210 and a locking assembly, the front frame 100 is rotatably connected to the connecting base 200, the rear frame 110 is fixedly connected to the connecting base 200, the rotation member 210 is rotatably connected to the connecting base 200, the connecting base 200 is provided with a guide groove 201 and a locking groove 202 communicated with the guide groove 201, the locking assembly includes a locking pin 211 and a driving mechanism, the locking pin 211 is movably disposed on the rotation member 210, and the driving mechanism can drive the locking pin 211 to be locked into the locking groove 202 or separated from the locking groove 202 and enter the guide groove 201. When the foldable frame according to the embodiment of the present invention is unfolded, the locking pin 211 is driven by the rotating element 210 to slide in the guide slot 201, and when the foldable frame is unfolded to a maximum angle, the driving mechanism can drive the locking pin 211 to be locked in the locking slot 202, so as to lock the foldable frame in the unfolded state.

Specifically, the locking device includes a connecting base 200, a rotation member 210 and a locking assembly. The two connecting sockets 200 are provided, and the rotating member 210 is rotatably disposed between the two connecting sockets 200. The front frame 100 is hinged with the connection seat 200. The rear frame 110 is fixedly connected with the connection seat 200. The rotation member 210 is rotatably coupled to the coupling base 200 by a bolt. The coupling holder 200 is provided with a guide groove 201 and a locking groove 202 communicating with the guide groove 201. The locking assembly includes a locking pin 211 and a driving mechanism, wherein the locking pin 211 is movably disposed on the rotating member 210 and extends into the guiding groove 201 toward both sides. The guide slot 201 is an arc slot, when the rotating member 210 rotates relative to the connecting seat 200, the rotating member can drive the locking pin 211 to slide in the guide slot 201, and the driving mechanism can drive the locking pin 211 to be clamped into the locking slot 202 or separated from the locking slot 202 and enter the guide slot 201. When the foldable frame according to the embodiment of the present invention needs to be unfolded, the handle bar 300 is pulled up to rotate the rotating member 210, the locking pin 211 slides along the guide groove 201, and when the foldable frame is unfolded to a maximum angle, the locking pin 211 is locked into the locking groove 202 by the driving mechanism to lock the foldable frame. When the folding bicycle frame of the embodiment of the utility model needs to be folded, the locking pin 211 is withdrawn from the locking groove 202 and enters the guide groove 201 through the driving mechanism, and the hand push rod 300 is pressed downwards to rapidly fold the bicycle frame.

Referring to fig. 2 and 3, in some embodiments of the present invention, the connection socket 200 is provided with a step portion 203. When the child sits, the foot pedal portion 203 can be used for feet of the child to pedal, and the sitting comfort level of the child is improved.

Specifically, there are two sets of pedal portions 203, which are integrally formed on the two connecting bases 200. The integral formation provides the footrest portion 203 with better strength and structural stability.

It will be appreciated that in some embodiments, the footrest section 203 is also removably attached to the connector base 200 and then installed for use when needed. The method is selected according to actual requirements.

Referring to fig. 2 and 3, in some embodiments of the present invention, the locking device further includes a limiting mechanism, the limiting mechanism includes a limiting block 102 disposed on the front frame 100 and a limiting groove 212 disposed on the rotating member 210 and matched with the limiting block 102, and the deployment angle of the front frame 100 and the rotating member 210 can be limited by the cooperation of the limiting block 102 and the limiting groove 212.

Specifically, the locking device further comprises a limiting mechanism. The limiting mechanism comprises a limiting block 102 integrally arranged on the front frame 100 and a limiting groove 212 arranged on the rotating member 210. When the foldable frame of the embodiment of the utility model is unfolded, when the front frame 100 is unfolded to the maximum angle, the limit block 102 can be clamped into the limit groove 212, so as to limit the unfolding angle of the front frame 100 and the rotating part 210.

Referring to fig. 2 and 4, in some embodiments of the present invention, the driving mechanism includes a slider 400, a wedge 410 and an elastic member 220, the slider 400 is slidably disposed in the rotating member 210, the locking pin 211 is disposed in the slider 400, the wedge 410 is slidably disposed in the rotating member 210 and abuts against the slider 400, the elastic member 220 is disposed between the slider 400 and the rotating member 210 and is capable of generating an elastic force acting on the slider 400 to force the locking pin 211 to be locked in the locking groove 202, the slider 400 is provided with a guide surface 401, the wedge 410 is provided with a driving surface 411 engaged with the guide surface 401, and the push rod 300 is capable of pushing the wedge 410 to move and driving the slider 400 to move against the elastic force by engagement of the driving surface 411 and the guide surface 401, so as to withdraw the locking pin 211 from the locking groove 202. In actual use, the wedge 410 can be directly pushed by the hand lever 300 to move the slider 400, so that the locking pin 211 is withdrawn from the locking groove 202 and enters the guide groove 201. The simplicity of the unlocking operation is increased.

Specifically, the driving mechanism includes a slider 400, a wedge 410, and an elastic member 220. The sliding member 400 is inserted into the rotating member 210 with a clearance fit. The locking pin 211 is fixedly provided to the slider 400 and is capable of following the slider 400. The wedge 410 is slidably disposed within the rotating member 210 and abuts the sliding member 400. The elastic element 220 is a spring, which is abutted between the sliding element 400 and the rotating element 210 and can generate an elastic force that pushes the sliding element 400 to move towards the outside of the rotating element. The slider 400 is provided with a guide surface 401, and the wedge 410 is provided with a driving surface 411 which is engaged with the guide surface 401. The guide surface 401 and the driving surface 411 are inclined surfaces, and when the wedge 410 is pushed axially from the handle 300, the inclined surfaces cooperate with each other to move the slider 400 into the rotating member 210 against the elastic force, so that the locking pin 211 is withdrawn from the locking groove 202 and enters the guide groove 201.

It can be understood that, in some embodiments, the guide surface 401 may be an arc surface, and the driving surface 411 is set as a spherical surface matched with the arc surface, so that when the wedge block 410 is pushed against, the same technical effect can be achieved through the matching of the spherical surface and the arc surface, and which structure is specifically selected, which structure is selected according to actual requirements.

Referring to fig. 1, 2 and 4, in some embodiments of the present invention, the hand push rod 300 includes an outer sleeve 310 and a telescopic rod 320, the outer sleeve 310 is inserted into the rotating member 210, the telescopic rod 320 is slidably connected to the outer sleeve 310 and can be retractably received in the outer sleeve 310, the telescopic rod 320 can push the wedge 410 to drive the sliding member 400 to move against the elastic force, so as to enable the locking pin 211 to exit the locking groove 202. The handspike 300 is set to be the segmentation contraction type, and can effectively reduce the occupation space when being stored, and simultaneously, the telescopic rod 320 contracted in the outer loop bar 310 is utilized to support and push the wedge block 410, so that the structure is ingenious, the folding frame can be unlocked when the handspike 300 is contracted, the folding steps are reduced, and the use convenience is improved.

Specifically, the handle bar 300 includes an outer sheath bar 310 and a telescopic bar 320. The telescopic rod 320 is inserted into the outer rod 310 in an interference fit manner, the telescopic rod 320 is retracted into the outer rod 310, and then the telescopic rod 320 is further pushed downward along the axis of the hand push rod 300 to push against the wedge 410, so that the slider 400 moves to withdraw the locking pin 211 from the locking groove 202.

Referring to fig. 5 and 6, in some embodiments of the present invention, the handle 300 is provided with an adjusting mechanism, the adjusting mechanism includes an elastic element 500, a latch 510 and a latch 520 matching with the latch 510, at least two of the latches 520 are provided on the outer sleeved rod 310, the latch 510 is provided on the telescopic rod 320 and can be engaged with the latch 520, and the elastic element 500 is provided between the latch 510 and the telescopic rod 320 and can drive the latch 510 to be engaged with the latch 520. The height of the hand push rod 300 can be adjusted by arranging the adjusting mechanism when the baby carriage is used, so that the baby carriage is suitable for people with different heights to use, and the use comfort of the baby carriage is improved.

Specifically, the push lever 300 is provided with an adjustment mechanism. The adjusting mechanism includes an elastic element 500, a latch 510 and a bayonet 520. The bayonet 520 has three parts arranged on the outer thimble 310 along the axis of the outer thimble 310. The latch 510 is disposed on the telescopic rod 320 and can be engaged with the latch 520, and the elastic element 500 is a spring, and abuts between the latch 510 and the inner wall of the telescopic rod 320 and can generate an elastic force for urging the latch 510 to press outwards. When the height of the handle bar 300 needs to be adjusted, the fixture block 510 is pressed into the bayonet 520, and then the height of the telescopic bar 320 can be adjusted.

Referring to fig. 1, 2 and 7, in some embodiments of the present invention, a seat assembly is included, one end of which is pivotally connected to the front frame 100 and the other end of which is connected to the front link 120 through a linkage mechanism. When the front connecting rod 120 is folded, the seat component can be driven to fold in a follow-up manner through the connecting rod mechanism, the folding steps are reduced, and the folding convenience is improved.

Specifically, a seat assembly is further included, and one end of the seat assembly is directly hinged to the front frame 100, and the other end is connected to the front link 120 through a link mechanism. When the folding frame provided by the embodiment of the utility model is folded, the seat component can be folded in a following way through the connecting rod mechanism, so that the folding steps are reduced, and the folding convenience is improved.

Referring to fig. 2 and 7, in some embodiments of the present invention, the link mechanism includes a bracket 630 and an extension arm 121 extending from the front link 120, wherein the bracket 630 is rotatably connected to the extension arm 121 at one end and rotatably connected to the seat assembly at the other end. When the front frame 100 is folded, the seat assembly can be driven to fold together through the cooperation of the support 630 and the extension arm 121.

Specifically, the link mechanism includes a bracket 630 and an extension arm 121 extending from the front link 120. The bracket 630 is bolted to the seat assembly at one end and is hinged to the extension arm 121 at the other end. When the front frame 100 and the front connecting rod 120 are folded, the extension arm 121 drives the bracket 630 to fold the seat assembly in a linkage manner, so as to achieve the technical effect of quick folding.

Referring to fig. 7 and 8, in some embodiments of the present invention, the seat assembly includes a seat plate 610 and a backrest 620, the seat plate 610 is rotatably connected to the bracket 630 at one end and the front frame 100 at the other end, and the backrest 620 is rotatably connected to the seat plate 610. When the folding chair is folded, the backrest 620 can be folded to be tightly attached to the seat plate 610 for storage, and the occupied space is reduced.

Specifically, the seat assembly includes a seat plate 610 and a backrest 620. The seat plate 610 has one end rotatably connected to the bracket 630 and the other end hinged to the front frame 100. The backrest 620 is connected with the seat plate 610 in a rotating mode, the backrest angle can be adjusted, the backrest 620 can be turned over towards the seat plate 610 and tightly attached to the seat plate 610 when folded, and occupied space when folded is reduced.

Referring to fig. 2 and 9, in some embodiments of the utility model, the stroller is provided with a carrying structure. Is convenient for carrying the baby carriage after being folded.

In particular, the buggy is provided with a carrying structure. The handle structure is a handle ring 230 rotatably disposed on the rotating member 210.

A stroller according to an embodiment of the second aspect of the utility model comprises a folding chassis according to the embodiment of the first aspect of the utility model described above.

Specifically, according to the baby carriage provided by the embodiment of the utility model, the folding frame is adopted, so that the baby carriage can be unfolded or folded quickly, the folding operation is simple and quick, and the use experience can be improved.

Referring to fig. 8, the stroller according to the embodiment of the present invention is in a state during folding.

Referring to fig. 9, the stroller of the present embodiment is in a fully folded position.

Other constructions and operations of strollers according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present specification, if reference is made to the description of "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", and "some examples", etc., reference is made to the terminology, it is intended that a particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A foldable vehicle frame, comprising:

a front frame (100);

a rear frame (110), the rear frame (110) being rotatably connected to the front frame (100);

the front connecting rod (120), one end of the said front connecting rod (120) is connected with said front frame (100) rotatably;

one end of the rear connecting rod (130) is rotatably connected with the other end of the front connecting rod (120), and the other end of the rear connecting rod (130) is rotatably connected with the rear frame (110), so that the front frame (100), the rear frame (110), the front connecting rod (120) and the rear connecting rod (130) form a four-bar mechanism;

an upper link (140), one end of the upper link (140) being rotatably connected to the front link (120) and/or the rear link (130);

the hand push rod (300), the hand push rod (300) is rotatably connected to the front frame (100) and/or the rear frame (110), and the other end of the upper connecting rod (140) is rotatably connected with the hand push rod (300), so that the four-bar linkage mechanism and the hand push rod (300) can be rotated in a linkage manner.

2. A folding chassis according to claim 1, characterized in that it comprises locking means able to define the angle of deployment of said front frame (100) with respect to said rear frame (110).

3. The folding frame of claim 2, characterized in that the locking device comprises a connecting seat (200), a rotating member (210) and a locking assembly, the front frame (100) is rotatably connected with the connecting seat (200), the rear frame (110) is fixedly connected with the connecting seat (200), the rotating member (210) is rotatably connected with the connecting seat (200), the connecting seat (200) is provided with a guide groove (201) and a locking groove (202) communicated with the guide groove (201), the locking assembly comprises a locking pin (211) and a driving mechanism, the locking pin (211) is movably arranged on the rotating member (210), and the driving mechanism can drive the locking pin (211) to be clamped into the locking groove (202) or separated from the locking groove (202) and enter into the guide groove (201).

4. The foldable frame according to claim 3, characterized in that the locking device further comprises a limiting mechanism, the limiting mechanism comprises a limiting block (102) arranged on the front frame (100) and a limiting groove (212) arranged on the rotating member (210) and matched with the limiting block (102), and the unfolding angle of the front frame (100) and the rotating member (210) can be limited through the cooperation of the limiting block (102) and the limiting groove (212).

5. A foldable chassis according to claim 3, characterized in that said driving means comprise a slider (400), a wedge (410) and a resilient element (220), said slider (400) being slidably arranged in said rotatable element (210), said locking pin (211) being arranged in said slider (400), said wedge (410) being slidably arranged in said rotatable element (210) and abutting against said slider (400), said resilient element (220) being arranged between said slider (400) and said rotatable element (210) and being capable of generating a resilient force acting on said slider (400) to force said locking pin (211) into said locking slot (202), said slider (400) being provided with a guiding surface (401), said wedge (410) being provided with a driving surface (411) cooperating with said guiding surface (401), said handspike (300) being capable of moving against said wedge (410), and the sliding piece (400) is driven to move against the elastic force by the matching of the driving surface (411) and the guide surface (401), so that the locking pin (211) is withdrawn from the locking groove (202).

6. The foldable frame according to claim 5, wherein the hand push rod (300) comprises an outer rod (310) and a telescopic rod (320), the outer rod (310) is connected to the rotating member (210), the telescopic rod (320) is slidably connected to the outer rod (310) and is retractably received in the outer rod (310), the telescopic rod (320) is capable of pushing the wedge (410) to move the slider (400) against the elastic force, so as to enable the locking pin (211) to exit from the locking groove (202).

7. A folding frame as claimed in claim 1, characterized by comprising a seat assembly, one end of which is pivotally connected to said front frame (100) and the other end of which is connected to said front link (120) by means of a linkage.

8. The folding chassis of claim 7, wherein said linkage mechanism includes a bracket (630) and an extension arm (121) extending from said front link (120), said bracket (630) being pivotally connected at one end to said extension arm (121) and at the other end to said seat assembly.

9. The folding frame of claim 8, characterized in that the seat assembly comprises a seat plate (610) and a backrest (620), the seat plate (610) being pivotally connected at one end to the bracket (630) and at the other end to the front frame (100), the backrest (620) being pivotally connected to the seat plate (610).

10. A stroller, characterized in that it comprises a folding frame according to any of claims 1 to 9.

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