Foldable support for frame, frame and baby carriage

Abstract

The invention discloses a foldable bracket for a frame. The foldable bracket comprises a handlebar assembly, a rear leg assembly; a chassis assembly; the folding assembly is movably connected between the handlebar assembly and the rear foot assembly and between the rear foot assembly and the underframe assembly; the foldable support and the frame are in a cart state in which the handlebar assembly is completely unfolded relative to the chassis assembly, a trailer state in which the handlebar assembly is semi-folded relative to the chassis assembly, and a storage state in which the handlebar assembly is completely folded relative to the chassis assembly.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of baby carriers, in particular to a foldable frame of a stroller, a stroller with the foldable frame, and a stroller. BACKGROUND

[0002] The stroller frame structures commonly seen in the market mostly have only one fixed structure, and the stroller frame structure stability is insufficient, thereby resulting in poor stability of the stroller using such a stroller frame structure. In addition, the stroller using such a stroller frame structure has a single function, and can only be used for baby and infant to ride. However, the baby and infant generally grow up to more than 3 years old and do not want to ride the stroller or cannot ride the stroller due to body size and other reasons. The service life of the stroller product is often longer than 3 years, which will result in the stroller being idle and wasted before reaching the product life. SUMMARY

[0003] The present disclosure proposes a stroller, a stroller frame, and a foldable frame of the stroller frame, which can at least solve one of the above technical problems.

[0004] The foldable frame for a stroller frame according to the present disclosure comprises: a handle assembly; a rear leg assembly; a chassis assembly; and a folding assembly movably coupled between the handle assembly and the rear leg assembly and between the rear leg assembly and the chassis assembly, so that the foldable frame and the stroller frame thereof are in a fully unfolded stroller state with the handle assembly relative to the chassis assembly, a semi-folded trailer state with the handle assembly relative to the chassis assembly, and a fully folded storage state with the handle assembly relative to the chassis assembly.

[0005] According to an embodiment, the folding assembly comprises: a first joint assembly pivoting the handle assembly and the rear leg assembly; a second joint assembly pivoting the rear leg assembly and the chassis assembly; an upper support, both ends of the upper support are movably connected with the handle assembly and the rear leg assembly at positions spaced apart from the first joint assembly; and a lower support, both ends of the lower support are movably connected with the rear leg assembly and the chassis assembly at positions spaced apart from the second joint assembly.

[0006] According to an embodiment, the foldable frame further comprises a release lock operation assembly provided on the handle assembly, which can slide along the longitudinal direction of the handle assembly and releasably engage and lock with the folding assembly, so as to lock the foldable frame in the stroller state or the trailer state. When the release lock operation assembly is unlocked with the folding assembly, the handle assembly can be pivoted relative to the rear leg assembly, and can further drive the rear leg assembly to pivot relative to the chassis assembly.

[0007] According to an embodiment, the release operation assembly comprises a sliding sleeve mounted on the handle assembly and slidable along the longitudinal direction of the handle assembly, a pull rod arranged in the handle assembly and extending along the longitudinal direction of the handle assembly, one end of the pull rod being fixedly connected with the sliding sleeve and the other end of the pull rod being connected with the folding assembly, and a safety lock arranged on the sliding sleeve for releasably locking the sliding sleeve on the handle assembly, wherein when the safety lock is released, the sliding sleeve is slidable along the longitudinal direction of the handle assembly, thereby driving the pull rod to slide towards or away from the folding assembly.

[0008] According to an embodiment, the first joint assembly of the folding assembly comprises a first locking portion fixedly connected with the end of the rear leg assembly adjacent to the first locking portion and pivotally connected with the end of the handle assembly adjacent to the first locking portion about a first folding axis extending transversely relative to the longitudinal direction of the handle assembly, and a first locking member having one end connected with the pull rod and the other end releasably locked with the first locking portion under a constant elastic biasing force.

[0009] According to an embodiment, the second joint assembly of the folding assembly comprises a second locking portion fixedly connected with the chassis assembly and pivotally connected with the rear leg assembly about a second folding axis extending transversely relative to the longitudinal direction of the chassis assembly, and a second locking member having one end slidably connected with the first locking portion and the other end releasably locked with the second locking portion.

[0010] According to an embodiment, the lower support member comprises a third support member and a fourth support member, the first end of the third support member being pivotally connected with the rear leg assembly, the second end of the third support member being pivotally connected with the first end of the fourth support member, and the second end of the fourth support member being pivotally connected with the chassis assembly.

[0011] According to an embodiment, the first end of the third support member is pivotally connected with the second end of the upper support member at the same pivot point of the rear leg assembly, and an arc-shaped slot extending around the pivot point is arranged at the lower part of the second end of the upper support member and below the pivot point, a rivet fixedly arranged at the corresponding position of the third support member being slidably arranged in the arc-shaped slot and slidable along the arc-shaped slot.

[0012] According to the present disclosure, a vehicle frame comprises a foldable support according to the present disclosure, a seat support assembly and a handle assembly fixedly connected with the handle assembly so as to be synchronously rotatable with the handle assembly, wherein wheels are respectively arranged on the rear leg assembly and the chassis assembly.

[0013] According to the present disclosure, a stroller comprises a vehicle frame according to the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1is a perspective schematic view of a stroller frame according to an embodiment of the present disclosure, wherein the stroller frame is in a fully deployed stroller state;

[0015] Figure 2 is a perspective schematic view of the stroller frame shown in Figure 1

[0016] Figure 3A is a perspective schematic view of the stroller frame shown in Figure 1

[0017] Figure 3G is a perspective schematic view of the stroller frame shown in Figure 3A

[0018] Figure 3B , 3C , 3D, 3E, 3F are side schematic views of the stroller frame shown in Figure 3A in an intermediate folding state from the stroller state shown in Figure 3G to the storage state shown in Figure 3C The state shown in

[0019] Figure 4A , Figure 4B and Figure 4C are side partial cross-sectional schematic views of the stroller frame shown in Figure 1 in different operating states, mainly showing the internal structure of the first joint assembly and its related components;

[0020] Figure 4D and Figure 4E are cross-sectional enlarged schematic views of the release operation assembly of the stroller frame shown in Figure 1 in different operating states;

[0021] Figure 4F is a cross-sectional schematic view of the handle assembly of the stroller frame;

[0022] Figure 5 is another partial cross-sectional schematic view of the stroller frame shown in Figure 1 , mainly showing the internal structure of the second joint assembly and its related components;

[0023] Figure 6 is a partial perspective exploded schematic view of the second joint assembly and its related components of the stroller frame shown in Figure 5 ;

[0024] Figure 7 is another partial perspective exploded schematic view of the second joint assembly and its related components of the stroller frame shown in Figure 5 ;

[0025] Figure 8 is a side view of the stroller frame shown in​​​Figure 7 A magnified cross-sectional view of a portion of the section cut by line AA;

[0026] Figure 9 yes Figure 7 A three-dimensional schematic diagram of the second joint assembly of the chassis and its related components after assembly;

[0027] Figure 10 This is a perspective view of an embodiment in which a trailing bar assembly is mounted on a vehicle frame according to an embodiment of the present disclosure;

[0028] Figure 11 yes Figure 10 The frame shown is in a partially folded state. Figure 11 The shown is a side view diagram of the state (also known as the semi-folded state or trailer state).

[0029] Figure 12 This is a perspective view of another embodiment of a tow bar assembly mounted on a vehicle frame according to another embodiment of the present disclosure;

[0030] Figure 13 This is a 3D schematic diagram of the tow bar assembly;

[0031] Figure 14 yes Figure 10 A partial cross-sectional view of a portion of the chassis is shown, with the tow bar assembly shown in an exploded manner;

[0032] Figure 15 This is a perspective view of a vehicle frame according to another embodiment of the present disclosure;

[0033] Figure 16 Is Figure 15 A perspective view of an embodiment in which a roof bracket is attached to a vehicle frame;

[0034] Figure 17 yes Figure 16 The diagram shows a side view of the frame, in which the frame is in a pushcart position;

[0035] Figure 18 yes Figure 16 The diagram shows a three-dimensional representation of the chassis, in which the chassis is in a semi-folded state (i.e., trailer state);

[0036] Figure 19 yes Figure 16 The diagram shows a side view of the frame, with the frame in its second folded state.

[0037] Figure 20 yes Figure 16 The diagram shows a side view of the frame, with the support frame in a stowed state and the rider assembly and seat support assembly not stowed.

[0038] Figure 21 is a side view schematic of the frame shown in FIG. 1, wherein the support is in the stowed condition, the rider assembly is collapsed, and the seat support assembly is not collapsed; Figure 16

[0039] Figure 22 is a side view schematic of the frame shown in FIG. 1, wherein the support is in the stowed condition, the rider assembly is collapsed, and the seat support assembly is not collapsed; Figure 16

[0040] Figure 23A is a side view schematic of the frame shown in FIG. 1, wherein the support is in the stowed condition, the rider assembly is collapsed, and the seat support assembly is not collapsed; Figure 16

[0041] Figure 23B is a side view schematic of the frame shown in FIG. 1, wherein the support is in the stowed condition, the rider assembly is collapsed, and the seat support assembly is not collapsed; Figure 23A

[0042] Figure 24A is a side view schematic of the frame shown in FIG. 1, wherein the support is in the stowed condition, the rider assembly is collapsed, and the seat support assembly is not collapsed; Figure 16

[0043] Figure 24B is a side view schematic of the frame shown in FIG. 1, wherein the support is in the stowed condition, the rider assembly is collapsed, and the seat support assembly is not collapsed; Figure 23A

[0044] Figure 24C Figure 24A

[0045] Figure 25A is a side view schematic of the frame shown in FIG. 1, wherein the support is in the stowed condition, the rider assembly is collapsed, and the seat support assembly is not collapsed;

[0046] Figure 25B is a side view schematic of the frame shown in FIG. 1, wherein the support is in the stowed condition, the rider assembly is collapsed, and the seat support assembly is not collapsed; Figure 25A

[0047] Figure 25C is a side view schematic of the frame shown in FIG. 1, wherein the support is in the stowed condition, the rider assembly is collapsed, and the seat support assembly is not collapsed; Figure 25A

[0048] Figure 26 is a side view schematic of the frame shown in FIG. 1, wherein the support is in the stowed condition, the rider assembly is collapsed, and the seat support assembly is not collapsed; Figure 25A

[0049] Figure 27A is a side view schematic of the frame shown in FIG. 1, wherein the support is in the stowed condition, the rider assembly is collapsed, and the seat support assembly is not collapsed; Figure 26

[0050] Figure 27B is a side view schematic of the frame shown in FIG. 1, wherein the support is in the stowed condition, the rider assembly is collapsed, and the seat support assembly is not collapsed; Figure 26 ​​​​​​​​​​​​A partially exploded perspective view of the first joint assembly, the second joint assembly, and related components of the frame shown.

[0051] Figure 28 yes Figure 26 A detailed anatomical view of the first joint assembly and related components of the frame shown.

[0052] Figure 29 yes Figure 26 A cross-sectional view of the first joint assembly of the chassis and its related components after assembly.

[0053] Figure 30 yes Figure 25C Another partial cross-sectional view of the first joint assembly and related components of the frame shown.

[0054] Figure 31 Is Figure 25C A side view schematic diagram of an embodiment in which a tow bar assembly is mounted on a vehicle frame;

[0055] Figure 32 This is a 3D diagram of the tray;

[0056] Figure 33A A perspective view of a vehicle frame with a tow bar assembly and a tray attached in a trailer configuration, according to one embodiment, is shown.

[0057] Figure 33B It shows Figure 33A A 3D diagram of the vehicle frame after the pallet has been removed;

[0058] Figure 34A A perspective view of a vehicle frame according to another embodiment with a tow bar assembly and a tray attached in a trailer configuration is shown, wherein the rider assembly is in a flat, extended position.

[0059] Figure 34B It shows Figure 34A A 3D diagram showing the rider components in the frame in a folded-down state;

[0060] Figure 34C It shows Figure 34A A 3D diagram of the vehicle frame after the pallet has been removed;

[0061] Figure 35 A three-dimensional schematic diagram of a basket is shown;

[0062] Figure 36 A perspective view is shown of a vehicle frame according to an embodiment with two seat cushions placed in a trailer configuration.

[0063] [List of Labels in the Attached Image]

[0064] 10 frames

[0065] 100 Driver Components

[0066] 110 Sliding Sleeve Groove

[0067] 120 Open Pipe Trench

[0068] 150 handle

[0069] 160 support rod section

[0070] 170 joint end

[0071] 171 spiral groove

[0072] 1711 Circumferential Section

[0073] 1712 Non-circumferential section

[0074] 200 rear foot components

[0075] 210 rear foot connector

[0076] 300 base frame assembly

[0077] 310 tow bar mounting holes

[0078] 311 Quick-release handle

[0079] 320 base frame connector

[0080] 400 release operation component

[0081] 410 safety lock

[0082] 411 button

[0083] 412 locking pin

[0084] 413 locking spring

[0085] 420 Sliding Sleeve

[0086] 430 pull rod

[0087] 440 Slide

[0088] 441 First Slide

[0089] 442 Second Slide

[0090] 443 First Inclined Slot

[0091] 444 Second Inclined Slot

[0092] 450 limit component

[0093] 451 First Limiting Component

[0094] 452 Second Limiting Component

[0095] 453 Third Limiting Component

[0096] 454 Fourth Limiting Component

[0097] 460 card assembly

[0098] 461 First Card Assembly

[0099] 462 Second Card Assembly

[0100] 470 pull rod spring

[0101] 500 folding components

[0102] 510 First Joint Component

[0103] 511 First Locking Component

[0104] 5111 First Spring

[0105] 512 First Locking Unit

[0106] 5121 First Locking Hole

[0107] 5122 Second Locking Hole

[0108] 5123 Long groove

[0109] 5124 Main Body

[0110] 5125 mounting rod

[0111] 520 Second Joint Component

[0112] 521 Second Locking Component

[0113] 5211 pull line

[0114] 52111 First pull wire head; 52112 Second pull wire head; 5212 Pull wire fixing component

[0115] 5213 Lock Block

[0116] 5214 card joint sales

[0117] 522 Second Locking Section

[0118] 5221 booth

[0119] 5222 Fixture

[0120] 5223 reinforcement

[0121] 5224 Pivot Shaft

[0122] 5225 Second Spring

[0123] 5226 First engaging part; 5227 Second engaging part; 5228 Guide groove

[0124] 5229 Sliding groove

[0125] 530 upper support component

[0126] 531 First Support Component

[0127] 532 Second Support Component

[0128] 533 arc groove

[0129] 534 Slider

[0130] 540 lower support component

[0131] 541 Third Support Component

[0132] 542 Fourth Support Component

[0133] 543 rivets

[0134] 560 pivot point

[0135] 600 Seat Support Components

[0136] 610 First Seat Support

[0137] 620 Second Seat Support

[0138] 700 Handrail Components

[0139] 800 canopy support

[0140] 810 First Canopy Support

[0141] 820 Second Canopy Support

[0142] 20 wheels

[0143] 30 Tow Bar Assembly

[0144] 31 Fixed Pin

[0145] 40 pallets

[0146] 41 tray card assembly

[0147] 42 tray mounting base

[0148] 50 baskets

[0149] 51 Basket pivot

[0150] 52 Basket Back Hook

[0151] 60 seat cushion

[0152] S First convergence axis

[0153] T Second Closing Axis

[0154] H closing height

[0155] W closing width Detailed Implementation

[0156] To more clearly illustrate the overall concept of this disclosure, a detailed explanation will be provided below with reference to the accompanying drawings.

[0157] It should be noted that many specific details are set forth in the following description to provide a full understanding of this disclosure; however, this disclosure may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this disclosure is not limited to the specific embodiments disclosed below.

[0158] Furthermore, it should be understood in the description of this disclosure that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “axial,” “radial,” and “circumferential,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the parts or components referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0159] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two entities connected are not linked by an intermediate structure, but are simply connected to form a whole. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0160] In this disclosure, unless otherwise expressly specified and limited, the "above" or "below" of a second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0161] [Overview]

[0162] Figures 1-36 Several embodiments and variations of this disclosure are illustrated schematically, but are merely for illustrating the technical concept of this disclosure and are not intended to limit the scope of protection of this disclosure.

[0163] refer to Figure 1 and Figure 2 The illustration shows a perspective view of a stroller frame according to an embodiment of the present disclosure, the frame being presented in a fully unfolded stroller state. Figures 3A-3G The display shows several configurations of the frame, from a fully extended pushcart state, through a partially folded trailer state, to a fully folded storage state.

[0164] In general, the frame 10 disclosed herein may include a collapsible bracket, a seat support assembly 600, and an armrest assembly 700.

[0165] The collapsible support may include a rider assembly 100, a rear foot assembly 200 with wheels 20 (e.g., rear wheels) mounted on it, a chassis assembly 300 with wheels 20 (e.g., front wheels) mounted on it, and a folding assembly 500 mounted and connected between and to the rider assembly 100, the rear foot assembly 200, and the chassis assembly 300. Specifically, folding assemblies 500 are provided on both sides of the collapsible support. Each folding assembly 500 is movably connected between the corresponding rider assembly 100 and the rear foot assembly 200, and also movably connected between the corresponding rear foot assembly 200 and the chassis assembly 300, such that the rider assembly 100 is pivotally connected to the corresponding rear foot assembly 200 and can rotate relative to the rear foot assembly 200, and the rear foot assembly 200 is pivotally connected to the chassis assembly 300 and can rotate relative to the chassis assembly 300. Thus, through the folding assembly 500, the rider assembly 100 can pivot relative to the base frame assembly 300 via the rear foot assembly 200, causing the foldable support and the frame 10 with the foldable support to present different states or configurations, namely, the rider assembly 100 in a fully extended push-cart state relative to the base frame assembly 300 (e.g., Figure 1 , Figure 2 and Figure 3A As shown), the driver assembly 100 is in a semi-folded trailer state relative to the underframe assembly 300 (as shown). Figure 3C As shown), the rider assembly 100 and seat support assembly 600 are in a fully retracted storage state relative to the chassis assembly 300 (as shown). Figure 3G (As shown).

[0166] Specifically, in the stroller state (e.g.) Figure 3A As shown, the rider assembly 100, rear foot assembly 200 and chassis assembly 300 can be arranged at an angle to each other in their longitudinal direction.

[0167] In trailer status (e.g.) Figure 3CAs shown, the rider assembly 100 and the chassis assembly 300 are arranged approximately parallel in their longitudinal direction, but they are arranged at an angle to the longitudinal direction of the rear foot assembly 200.

[0168] In storage state (e.g.) Figure 3G As shown, the rider assembly 100, rear foot assembly 200 and base frame assembly 300 form the smallest angle in their longitudinal direction. In other words, the three are approximately parallel, thus achieving minimal space occupation and facilitating storage.

[0169] Figure 3B , 3D 3E and 3F show intermediate folded states other than the trolley state, trailer state, and storage state, respectively.

[0170] The seat support assembly 600 and the armrest assembly 700 can be fixedly connected, and the seat support assembly 600 can be fixedly connected to the rider assembly 100. Therefore, when the rider assembly 100 is folded relative to the rear footrest assembly 200 or the chassis assembly 300, the seat support assembly 600 will cause the armrest assembly 700 to rotate synchronously with the rotation of the rider assembly 100. However, this disclosure is not limited to this; depending on specific design requirements, the seat support assembly 600 may not be fixedly connected to the rider assembly 100, or the armrest assembly 700 may be fixedly connected to the rider assembly 100.

[0171] [Frame]

[0172] like Figures 1-2 As shown, the underframe assembly 300 is generally a rectangular frame and is mounted horizontally at the bottom of the vehicle frame. Front wheels are mounted below the two front corners of the rectangular frame of the underframe assembly 300. However, this disclosure is not limited to this; it is conceivable that a front wheel could be mounted below the middle of the front crossbeam of the rectangular frame.

[0173] The rear foot assembly 200 can be pivotally connected to the rear of the rectangular frame of the underframe assembly 300 by means of two rods that are respectively inclinedly arranged on the outside of the underframe assembly 300, and the rear wheel is installed at the lower end of each rod of the rear foot assembly 200.

[0174] The driver component 100 has a U-shaped frame, such as Figure 2 As shown, the device has an inverted U-shaped handle portion 150 and a support rod portion 160 connected to the handle portion 150. The support rod portion 160 has support rods respectively connected to both ends of the handle portion 150. For the sake of folding and a more compact space when folded, the handle portion 150 and the support rod portion 160 can be designed to pivot relative to each other, thereby allowing switching between a flat, unfolded state and a folded, collapsed state. The ends of the two support rods of the support rod portion 160 each have a connecting end 170 (e.g., ...). Figure 4FAs shown), the upper ends of the two rods pivotally connected to the rear leg assembly 200 are used so that the rider assembly 100 and the seat support assembly 600, armrest assembly 700 and other components fixed thereto can be used together with the rear leg assembly 200 and the base frame assembly 300 to form a frame 10 for an infant vehicle (also referred to as a stroller in this document).

[0175] In addition to the rider assembly 100, rear foot assembly 200, chassis assembly 300, folding assembly 500, seat support assembly 600, and armrest assembly 700 as described above, the frame 10 may also include a release operation assembly 400 for operating the folding bracket and a pivotable roof bracket 800 mounted on the seat support assembly 600.

[0176] Furthermore, the frame 10 can also be further connected to, including, the tow bar assembly 30 (such as...). Figures 10-14 As shown), tray 40 (as shown) Figure 32 , Figure 33A ,and Figures 34A-34B (as shown), basket 50 (as shown) Figure 35 When used with other accessories (as shown), the frame 10 can provide more functions for the infant vehicle in trailer mode, and can improve convenience and operation experience.

[0177] For stability and other considerations, rear foot connectors 210 may be provided, particularly between the rear foot assemblies 200, especially near the wheel 20. The rear foot connector 210 may be, for example, a straight rod or a curved rod with a certain curvature. Similarly, one or more underframe connectors 320 may be installed inside the rectangular frame of the underframe assembly 300. For example, two underframe connectors 320 may be provided (e.g.,...). Figure 2 As shown), they are located at the front and rear of the rectangular frame, respectively. The base frame connector 320 can also be, for example, a straight rod or a curved rod with a certain curvature. A trailing rod mounting hole 310 (as shown) can be provided in the middle of the front crossbeam of the base frame assembly 300. Figure 1 (As shown), for mounting the tow bar assembly 30, which will be described in detail below.

[0178] The seat support assembly 600 includes a first seat support member 610, which is U-shaped and located above, and a second seat support member 620, which is U-shaped and located below. The first seat support member 610 and the second seat support member 620 abut against each other to form a rectangular frame configuration. The seat support assembly 600 is fixedly connected to the rider assembly 100 and is located in the same plane. Regardless of the frame's orientation, the seat support assembly 600 is at least spaced a certain distance from the underframe assembly 300. Figures 3A-3GAs shown. Additionally, the first seat support 610 and the second seat support 620 can be fixedly connected, or they can be connected via a lockable and releaseable pivoting structure, allowing the second seat support 620 to be folded relative to the first seat support 610 (e.g., Figure 3G (As shown).

[0179] The armrest assembly 700 can be a U-shaped frame and is fixedly connected to the middle of the seat support assembly 600 via two legs of its U-shaped frame, thus allowing it to move together with the seat support assembly 600. The two legs of the U-shaped frame of the armrest assembly 700 can be fixed to the inner side of the first seat support member 610. The plane containing the armrest assembly 700 can be substantially perpendicular to the plane containing the seat support assembly 600, and more specifically, the first seat support member 610.

[0180] The canopy support 800 includes a first canopy support 810 and a second canopy support 820 for deploying and retracting the canopy fabric. The canopy support 800 is mounted on the seat support assembly 600 and can move together with the seat support assembly 600. One of the first canopy support 810 and the second canopy support 820 can be fixedly mounted to the seat support assembly 600, while the other can be pivotally mounted to the seat support assembly 600, or both can be pivotally mounted to the seat support assembly 600, allowing the first canopy support 810 and the second canopy support 820 to pivot relative to each other, thereby enabling the canopy to deploy and retract. Optionally, the entire canopy support 800 can rotate relative to the seat support assembly 600 via a lockable pivoting structure, wherein the first canopy support 810 and the second canopy support 820 are also configured to pivot relative to each other.

[0181]

Collapsing Components

[0182] Figure 4A , Figure 4B and Figure 4C They are Figure 1 The schematic diagram of the side partial cross-section of the frame 10 under different operating conditions mainly shows the internal structure of the first joint assembly 510 and its related components. Figure 4D and Figure 4E They are Figure 1 The diagram shows an enlarged cross-sectional view of the unlocking operation assembly 400 of the frame 10 in different operating states. Figure 4F This is a cross-sectional schematic diagram of the rider assembly 100 of the frame 10. The structure of the retractable assembly 500 will be described in detail below with reference to specific embodiments.

[0183] According to one embodiment of the present disclosure, the retraction assembly 500 may include a first joint assembly 510, a second joint assembly 520, an upper support member 530, and a lower support member 540.

[0184] Primary configuration of first and second joint assemblies

[0185] like Figures 4A-4C As shown, the first joint assembly 510 pivotally connects the handlebar assembly 100 and the rear leg assembly 200. In one embodiment, the first joint assembly 510 is pivotally connected to the connecting end 170 of the handlebar assembly 100 on one hand, and fixedly connected to the rear leg assembly 200 on the other hand, thereby allowing the handlebar assembly 100 and the rear leg assembly 200 to be connected by means of the first joint assembly 510 around a first retraction axis S (e.g., extending laterally along the lateral direction of the stroller, i.e., laterally relative to the longitudinal direction of the handlebar assembly 100). Figure 2 (As shown) pivot.

[0186] by Figures 4A-4C As shown in the example, the first joint assembly 510 includes a first locking part 512, which is fixedly connected to the end of the rear foot assembly 200 adjacent to the first locking part 512 (i.e., the upper end of the rear foot assembly 200), and is connected to the end of the rider assembly 100 adjacent to the first locking part 512 (i.e., the connecting end 170) in a manner that allows it to pivot about the first retraction axis S.

[0187] Specifically, the first locking part 512 includes: a main body 5124, which is basically disc-shaped, and a first retractable axis S (e.g., Figure 2 (As shown) Passing through the rotation center of the main body 5124; and the mounting rod 5125, extending tangentially outward from the periphery of the main body 5124, for fixing to the rear foot assembly 200. The engaging end 170 of the rider assembly 100 is also generally disc-shaped and formed with an accommodating space complementary to the shape of the main body 5124, for accommodating the main body 5124 therein, allowing the main body 5124 to rotate relative to it. Similarly, as Figure 4F As shown, the two support rods of the support rod portion 160 are arranged to extend tangentially from the periphery of the connecting end 170 to the handle portion 150 (not shown).

[0188] The first joint assembly 510 also includes a first locking member 511, which is movably disposed between the upper end of the main body 5124 and the end of the support rod of the support rod 160. One end of the first locking member 511 is fixedly connected to a pull rod 430 disposed within the support rod of the release operation assembly 400 (described in detail later). A first spring 5111 acts on the first locking member 511 and is located between the first locking member 511 and the end of the support rod 160. Under the elastic bias of the first spring 5111, the other end of the first locking member 511 is always pressed against the periphery of the main body 5124. It is readily understood that the first spring 5111 can be replaced by other elastic elements such as an elastic contact strip.

[0189] The second joint assembly 520 is pivotally connected to the rear leg assembly 200 and the base frame assembly 300. In one embodiment, the second joint assembly 520 is pivotally connected to the rear leg assembly 200 on one hand and fixedly connected to the base frame assembly 300 on the other, thereby allowing the rear leg assembly 200 and the base frame assembly 300 to be connected around a second retraction axis T (e.g., parallel to the first retraction axis S) by means of the second joint assembly 520. Figure 2 (As shown) pivot.

[0190] Figure 5 yes Figure 1 Another partial cross-sectional view of the frame 10 shown primarily illustrates the internal structure and associated mechanisms of the first joint assembly 510, the second joint assembly 520, and their related components. Figures 6-7 yes Figure 5 A partial exploded perspective view of the second joint assembly 520 and related components of the frame 10 shown. Figure 8 It is along Figure 7 A magnified sectional view taken from line AA. Figure 9 yes Figure 7 The diagram shows a three-dimensional representation of the second joint assembly 520 of the frame 10 and its related components after assembly.

[0191] by Figures 5-7 Taking the example shown, the second joint assembly 520 includes a second locking member 521 and a second locking part 522. The second locking member 521 is disposed within the rear leg assembly 200 and includes a pull line 5211 and a pull line fixing member 5212. The second locking part 522 is fixed to the base frame assembly 300 and is pivotally connected to the rear leg assembly 200 in a manner that allows it to pivot about a second retraction axis T (which extends laterally relative to the longitudinal direction of the base frame assembly 300).

[0192] The pull wire 5211 extends along the longitudinal direction of the rear foot assembly 200. One end of the pull wire 5211 is slidably connected to the first locking part 512 of the first joint assembly 510. Specifically, one end of the pull wire 5211 is provided with a first pull wire head 52111, which is movably engaged in a corresponding guide groove provided on the main body 5124 of the first joint assembly 510, and moves relative to the main body 5124 along the guide groove as the main body 5124 rotates. In one embodiment, the corresponding guide groove on the main body 5124 of the first joint assembly 510 is an elongated groove 5123 extending radially on its disc surface, preferably an elongated straight groove, such as... Figures 4A-4B As shown, the first pull wire head 52111 is housed in the elongated groove 5123.

[0193] The pull cable fixing member 5212 is slidably mounted within the rear foot assembly 200 along its longitudinal direction. The other end of the pull cable 5211, the second pull cable head 52112, is disposed on the pull cable fixing member 5212, such that the movement of the pull cable 5211 as the first locking part 512 rotates can drive the pull cable fixing member 5212 to slide within the rear foot assembly 200. A second spring 5225 is provided between the pull cable fixing member 5212 and the pivot shaft 5224 extending along the second retraction axis T, which applies a continuous tension force to the pull cable fixing member 5212, causing the pull cable fixing member 5212 to be biased downward along the rear foot assembly 200, so that the pull cable 5211 is always subjected to a tensioning elastic force. It is readily understood that the second spring 5225 can be replaced with other elastic elements such as an elastic contact strip.

[0194] In one embodiment, the periphery of the main body 5124 of the first joint assembly 510 is provided with a first locking hole 5121 and a second locking hole 5122 along the circumferential direction, so that the other end of the first locking member 511 can be inserted into one of them to realize the positioning and engagement of the frame 10 in different states.

[0195] Specifically, the positions of the first locking hole 5121 and the second locking hole 5122 on the circumference are designed such that:

[0196] When the rider assembly 100 pivots relative to the first locking part 512 to the position where the first locking member 511 is inserted into the first locking hole 5121, the frame 10 is locked in the push-cart state (e.g., Figure 4A (as shown);

[0197] When the rider assembly 100 pivots relative to the first locking part 512 to the position where the first locking member 511 is inserted into the second locking hole 5122, the frame 10 is locked in the trailer state (e.g., Figure 4C (as shown);

[0198] When the rider assembly 100 pivots relative to the first locking part 512 to a position on the circumferential surface of the first locking member 511 other than the first locking hole 5121 and the second locking hole 5122 of the main body part 5124, the frame 10 is in an unlocked intermediate state.

[0199] For ease of operation, optionally, a chamfer or rounding can be provided at the opening of the first locking hole 5121 and the second locking hole 5122 to facilitate the insertion of the first locking member 511, and / or a chamfer or rounding can be provided at the end of the first locking member 511 to facilitate the insertion of the opening of the first locking hole 5121 and the second locking hole 5122.

[0200] In one embodiment, a spiral groove 171 is provided on the disc surface of the engagement end 170 of the rider assembly 100, comprising a circumferential section 1711 extending in the circumferential direction along the disc surface of the engagement end 170 and a non-circumferential section 1712 extending toward the central region of the disc surface of the engagement end 170, such as... Figure 5 As shown. The first pull cable head 52111 is housed in the elongated groove 5123. As the main body 5124 rotates, the first pull cable head 52111 slides within the elongated groove 5123, and also protrudes laterally outward from the elongated groove 5123, sliding within the spiral groove 171. Thus, when the rider assembly 100 rotates, the first pull cable head 52111 slides accordingly within the circumferential section 1711 or the non-circumferential section 1712 of the spiral groove 171, thereby driving the second pull cable head 52112 of the pull cable 5211 to move. The second pull cable head 52112 is connected and fixed to the pull cable fixing member 5212. The pulling action of the pull line 5211 can drive the pull line fixing member 5212 to slide, thereby driving the second joint assembly 520 to lock and unlock, thus realizing the locking and unlocking of the rear foot assembly 200 and the base frame assembly 300.

[0201] In one embodiment, a different configuration of the spiral groove 171 is provided on the disc surface of the engagement end 170 of the rider assembly 100, which includes a circumferential section 1711 extending in the circumferential direction along the disc surface of the engagement end 170 and a non-circumferential section 1712 extending toward the central region of the disc surface of the engagement end 170, such as... Figure 27A As shown, with the rotation of the main body 5124, the first pull wire head 52111 slides within the spiral groove 171. This causes the pull wire 5211 to lock and unlock the second joint assembly 520.

[0202] The configuration of the elongated groove and the corresponding spiral groove described above is designed mainly based on the retraction action of the support, and is not limited to the various embodiments shown herein.

[0203] In one embodiment, the second locking member 521 further includes a locking block 5213. The locking block 5213 is disposed on both the pull line fixing member 5212 and the base frame assembly 300. The locking block 5213 is fixedly connected to the pull line fixing member 5212. As the pull line fixing member 5212 slides, the locking block 5213 slides accordingly, achieving disengagement or engagement with the base frame assembly 300. Specifically, the locking block 5213 can be designed to extend laterally from the rear leg assembly 200 into the second locking portion 522 fixed to the base frame assembly 300, for locking both the rear leg assembly 200 and the base frame assembly 300.

[0204] The second locking part 522 may further include a locking seat 5221 and a fixing seat 5222. The locking seat 5221 is fixedly connected to the longitudinal outer side of the base frame assembly 300 and is disposed between the rear foot assembly 200 and the base frame assembly 300. The locking seat 5221 has a first engaging portion 5226 that opens radially outward on its surface facing the rear foot assembly 200. The fixing seat 5222 is disposed between the locking seat 5221 and the rear foot assembly 200 and is fixed to the rear foot assembly 200, and is pivotally connected to the locking seat 5221 via a pivot shaft 5224 fixed to the locking seat 5221. The fixing seat 5222 has a second engaging portion 5227 corresponding to the first engaging portion 5226 on the locking seat 5221. The locking block 5213 releasably engages the first engaging portion 5226 and the second engaging portion 5227.

[0205] like Figures 8-9 As shown, when the locking block 5213 engages with both the first engaging portion 5226 and the second engaging portion 5227, it locks the card holder 5221 and the fixing seat 5222, thereby locking the rear leg assembly 200 and the base frame assembly 300. If the locking block 5213 disengages from the first engaging portion 5226 and the second engaging portion 5227, the card holder 5221 and the fixing seat 5222 can pivot relative to each other around the pivot axis 5224, thereby releasing the rear leg assembly 200 and the base frame assembly 300 and allowing them to pivot relative to each other.

[0206] Optionally, the second locking part 522 may further include a reinforcing member 5223, which is fixed to the side of the fixing base 5222 facing the card holder 5221, and also has an engaging part corresponding to the first engaging part 5226 for engaging with the locking block 5213. The reinforcing member 5223 can enhance the locking stability of the second locking part 522 and the locking block 5213. In addition, the reinforcing member 5223 can also ensure that an appropriate pivot clearance is maintained between the card holder 5221 and the fixing base 5222. Optionally, the reinforcing member 5223 may be fixed to the side of the fixing base 5222 facing the pull wire fixing member 5212.

[0207] exist Figures 23A-24C In one embodiment shown, an alternative configuration of the second joint assembly 520 is proposed instead of locking and unlocking by means of a locking block.

[0208] The second locking element 521 may include a pull wire 5211, a pull wire fixing element 5212, and a locking pin 5214. The pull wire 5211 and the pull wire fixing element 5212 are arranged in the same way as in the previous embodiment, and will not be described again here.

[0209] At least one guide groove 5228 is provided on the outer surface of the retainer 5221 of the second joint assembly 520 of the frame 10 facing the fixed seat 5222. For example, Figure 23A and Figure 24BThe diagram shows two guide grooves 5228, which are arranged symmetrically with respect to the pivot axis 5224. Each guide groove 5228 has a radial section and a circumferential section. A locking pin 5214, corresponding to and insertable into the guide groove 5228, is provided on the mounting base 5222 of the second joint assembly 520. The locking pin 5214 is fixed to the pull line fixing member 5212, allowing it to move with the movement of the pull line. The locking pin 5214, sliding along with the pull line fixing member 5212, can move along the radial section of the guide groove 5228 and the sliding groove 5229, and further along the circumferential section of the guide groove 5228, thereby changing the rear foot assembly 200 and the base frame assembly 300 from a locked state to an unlocked state. In other words, when the locking pin 5214 is located in the radial section of the guide groove 5228, the locking seat 5221 and the fixed seat 5222 are locked together and cannot rotate relative to each other. When the locking pin 5214 is located in the circumferential section of the guide groove 5228, the locking seat 5221 and the fixed seat 5222 are unlocked together and can rotate relative to each other.

[0210] Figure 23B It shows along Figure 23A A magnified sectional view of a portion of the section cut by line BB. Figure 24A and Figure 24C It shows Figure 16 The diagram shows a partial structure of the second joint assembly 520 of the frame 10, illustrating the arrangement of the locking pin 5214 on the mounting base 5222. The mounting base 5222 has a radially extending guide groove 5229, which restricts the direction and travel of the locking pin 5214 as it moves with the pull wire fixing member 5212.

[0211] Primary configuration of upper and lower supports

[0212] According to this disclosure, the lower end of the upper support member 530 and the upper end of the lower support member 540 are both movably connected to the rear foot assembly 200, and are located between the first locking portion 512 of the first joint assembly 510 and the second locking portion 522 of the second joint assembly 520. The upper end of the upper support member 530 is movably connected to the rider assembly 100, and the lower end of the lower support member 540 is movably connected to the base frame assembly 300. Thus, the upper support member 530 and the lower support member 540, together with the first joint assembly 510 and the second joint assembly 520, constitute a folding assembly 500 arranged between the rider assembly 100, the rear foot assembly 200, and the base frame assembly 300, to achieve the desired state of the support 10.

[0213] like Figures 1-11 As shown, it illustrates one configuration mode of the upper support and the lower support.

[0214] Specifically, the upper support member 530 includes a first support member 531 and a second support member 532. The upper support member 530 is movably connected to the rider assembly 100 and the rear foot assembly 200 at a certain distance from the first locking part 512 of the first joint assembly 510. Specifically, the first end of the first support member 531 is pivotally connected to the rider assembly 100, the second end of the first support member 531 is pivotally connected to the first end of the second support member 532, and the second end of the second support member 532 is pivotally connected to the rear foot assembly 200. The first support member 531, the second support member 532, the rider assembly 100, and the rear foot assembly 200 form a four-bar linkage structure.

[0215] The lower support member 540 includes a third support member 541 and a fourth support member 542. The lower support member 540 is pivotally connected to the rear leg assembly 200 and the base frame assembly 300 at a certain distance from the second locking part 522 of the second joint assembly 520. Specifically, the first end of the third support member 541 is pivotally connected to the rear leg assembly 200, the second end of the third support member 541 is pivotally connected to the first end of the fourth support member 542, and the second end of the fourth support member 542 is pivotally connected to the base frame assembly 300. The third support member 541, the fourth support member 542, the rear leg assembly 200, and the base frame assembly 300 form another four-bar linkage structure.

[0216] In one embodiment, the first end of the third support 541 is closer to the first locking portion 512 of the first joint assembly 510 than the second end of the second support 532.

[0217] like Figures 3A-3G As shown, the frame 10 can be in six states: push-cart state, first folded state, trailer state, second folded state, third folded state, and storage state. The frame 10 can switch between these states sequentially or in reverse order.

[0218] exist Figure 3A In the push-cart position, the frame 10 can be used as a stroller frame for an infant to sit on, i.e., the frame 10 is in the push-cart position. When the frame 10 is in the push-cart position, the handlebar assembly 100 and the rear leg assembly 200 are fixed together by the first joint assembly 510 and the upper support member 530, and the rear leg assembly 200 and the base frame assembly 300 are fixed together by the second joint assembly 520 and the lower support member 540. At this time, the first support member 531 and the second support member 532 of the upper support member 530 are connected and extend vertically, and the third support member 541 and the fourth support member 542 of the lower support member 540 are connected and extend vertically, with the upper support member 530 and the lower support member 540 being parallel to each other.

[0219] exist Figure 3BIn the first folded state, the frame 10 is in the folded position. The angle between the rider assembly 100 and the rear leg assembly 200 is smaller than the angle between them when the frame 10 is in the push position, while the angle between the rear leg assembly 200 and the base frame assembly 300 remains unchanged. At this time, the rider assembly 100 and the rear leg assembly 200 are unlocked and can pivot freely, while the rear leg assembly 200 and the base frame assembly 300 remain fixed. The first support member 531 and the second support member 532 of the upper support member 530 are connected at an angle, while the third support member 541 and the fourth support member 542 of the lower support member 540 are still connected and extend in the vertical direction.

[0220] exist Figure 3C In the current configuration, the frame 10 is in a trailer position. At this time, the rider assembly 100 is rotated to a roughly horizontal position, and the rider assembly 100 and the rear foot assembly 200 are locked in the same position. The rider assembly 100 and the rear foot assembly 200 are secured by the first joint assembly 510 and the upper support member 530, while the rear foot assembly 200 and the base frame assembly 300 are secured by the second joint assembly 520 and the lower support member 540. The angle between the rider assembly 100 and the rear foot assembly 200 is smaller than the angle between them when the frame 10 is in the first folded state, and the angle between the rear foot assembly 200 and the base frame assembly 300 remains unchanged. At this time, the first support member 531 and the second support member 532 of the upper support member 530 are connected at an angle, and the third support member 541 and the fourth support member 542 of the lower support member 540 are still connected and extend vertically.

[0221] exist Figure 3D In the second folded state, the frame 10 is unlocked again and can pivot freely, while the rear foot assembly 200 and the chassis assembly 300 remain fixed. At this time, the angle between the rider assembly 100 and the rear foot assembly 200 is smaller than the angle between them when the frame 10 is in the trailer state, and the angle between the rear foot assembly 200 and the chassis assembly 300 remains unchanged. The angle between the first support member 531 and the second support member 532 of the upper support member 530 is also correspondingly smaller than the angle between them when the frame 10 is in the trailer state, and the third support member 541 and the fourth support member 542 of the lower support member 540 are still connected and extend in the vertical direction.

[0222] exist Figure 3EIn the third folded state, the frame 10 is in the rider assembly 100 and the rear leg assembly 200 are unlocked, as are the rear leg assembly 200 and the chassis assembly 300. At this time, the angle between the rider assembly 100 and the rear leg assembly 200 is greater than the angle between them when the frame 10 is in the second folded state, while the angle between the rear leg assembly 200 and the chassis assembly 300 is smaller than the angle between them when the frame 10 is in the second folded state. The angle between the first support member 531 and the second support member 532 of the upper support member 530 is also correspondingly greater than the angle between them when the frame 10 is in the second folded state. The third support member 541 and the fourth support member 542 of the lower support member 540 are connected at an angle.

[0223] exist Figure 3F and 3G In the current configuration, the frame 10 is in a stowed state, which can be stored using straps or a storage bag. The rider assembly 100 and rear leg assembly 200, as well as the rear leg assembly 200 and chassis assembly 300, are all in an unlocked state. At this time, the rider assembly 100, rear leg assembly 200, and chassis assembly 300 are roughly parallel to each other, and the rear leg assembly 200 and chassis assembly 300 can partially overlap in the longitudinal direction of the frame 10. See also... Figure 3G The rider assembly 100 can continue to retract towards the upper left of the frame 10, and the seat support assembly 600 can continue to retract towards the lower left of the frame 10.

[0224] Figures 15-23A Another configuration of the upper and lower support members is shown. For the sake of brevity, details identical to the aforementioned configuration of the upper and lower support members will be omitted or briefly described below.

[0225] like Figures 15-23A As shown, the upper support member 530 includes a first support member 531 and a second support member 532, and the lower support member 540 includes a third support member 541 and a fourth support member 542. The second end of the second support member 532 and the first end of the third support member 541 are pivotally connected to the rear foot assembly 200 at the same pivot point 560. Specifically, the first end of the first support member 531 is pivotally connected to the rider assembly 100, the second end of the first support member 531 is pivotally connected to the first end of the second support member 532, the second end of the second support member 532 and the first end of the third support member 541 are pivotally connected to the rear foot assembly 200 at the same pivot point 560, the second end of the third support member 541 is pivotally connected to the first end of the fourth support member 542, and the second end of the fourth support member 542 is pivotally connected to the underframe assembly 300.

[0226] An arcuate groove 533 extending around the pivot point 560 is provided below the pivot point at the second end of the second support member 532. A rivet 543 is provided on the third support member 541, the position of the rivet 543 corresponding to the arcuate groove 533, and it can be slidably inserted into the arcuate groove 533. The rivet 543 may optionally be a T-shaped rivet. When the second support member 532 rotates around the pivot point 560, the rivet 543 slides accordingly in the arcuate groove 533, thereby driving the third support member 541 to move accordingly, so that the upper support member 530 and the lower support member 540 have a better linkage effect. The remaining structures of the upper support member 530 and the lower support member 540 are similar to the relevant structures in the aforementioned embodiments, and will not be described again here.

[0227] Specifically, such as Figure 17 As shown, when the frame 10 is in the pushcart state, the rivet 543 is located at the left end of the arc-shaped groove 533. The arc-shaped groove 533 does not apply force to the rivet 543, or applies an appropriate amount of force to the rivet 543 to the right to make the support effect of the lower support member 540 more stable. Figure 18 As shown, when the frame 10 is in a trailer position, the rivet 543 is located at a certain point in the middle of the arc-shaped groove 533, and the arc-shaped groove 533 does not apply force to the rivet 543. However, as... Figure 19 As shown, the frame 10 is in the second folded state. Further rotation of the rider assembly 100, just as the frame 10 is about to transition from the second folded state to the third folded state, causes the rivet 543 to be located at the right end of the arcuate groove 533. The arcuate groove 533 applies force to the rivet 543 to drive the third support member 541 to pivot, thereby facilitating the unlocking and pivoting of the second joint assembly 520. Figures 20-22 As shown, the frame 10 is in a stowed state, and the rivet 543 is located at a certain point in the middle of the arc groove 533. The arc groove 533 does not apply force to the rivet 543. Figures 17-22 The diagram illustrates how the interaction between rivets 543 and arcuate grooves 533 facilitates the folding of the frame 10 when it transitions from a pushcart state to a stowed state. Conversely, the interaction between rivets 543 and arcuate grooves 533 also facilitates the unfolding of the frame 10 when it transitions from a stowed state to a pushcart state, which will not be elaborated further here.

[0228] Figures 25A-30 This illustrates yet another configuration of the upper and lower support members. For the sake of brevity, details identical to the aforementioned configurations of the upper and lower support members will be omitted or briefly described below.

[0229] Figures 25A-25B A perspective view of a vehicle frame 10 according to one embodiment is shown, wherein the vehicle frame 10 is in a pushcart position. Figure 25C This is a 3D view of the chassis 10 in a trailer configuration. Figure 26 This is a side view of the frame 10 in a pushcart position.Figures 27A-27B This is a partial cross-sectional view of the first joint assembly 510, the second joint assembly 520, and their related components of the frame 10. Figure 28 This is an exploded perspective view of the first joint assembly 510 of the frame 10 and its related components. Figure 29 This is a cross-sectional view of the first joint assembly 510 of the frame 10 and its related components after assembly. Figure 30 This is another partial cross-sectional view of the first joint assembly 510 of the frame 10 and its related components, and Figure 31 This is a side view of an embodiment in which a tow bar assembly 30 is mounted on a trailer frame 10 in a trailer configuration.

[0230] like Figures 25A-25C , Figure 26 , Figures 27A-27B and Figure 31 As shown, the upper support member 530 is a single support member. The first end of the upper support member 530 is pivotally connected to the rider assembly 100 on the side facing the underframe assembly 300, and the second end of the upper support member 530 is pivotally connected to the rear foot assembly 200 on the side facing the rider assembly 100. Figure 25B As can be seen, the rider assembly 100 has an opening groove 120 extending along the longitudinal direction of the rider assembly 100 on the side facing the base frame assembly 300. The first end of the upper support member 530 is pivotally connected to a slider 534, which can slide along the opening groove 120. Figures 27A-27B This is a partial cross-sectional view of the first joint assembly 510 and the second joint assembly 520 of the frame 10. Their structures are the same as those in the aforementioned embodiments, and will not be described again here.

[0231]

Lock Release Operation Component

[0232] The release operation assembly 400 is an operating component used to control the locking and unlocking of the frame 10. The structure and operating mechanism of the release operation assembly 400 will be described in detail below.

[0233] The release mechanism 400 is mounted on the rider assembly 100 and can slide along the rider assembly 100. Figure 1 As shown, the release operation component 400 can be disposed on a support rod portion 160 of the rider assembly 100, for example, in the middle part of the left support rod portion 160 of the rider assembly 100, so as to facilitate operation by the user.

[0234] Figure 4A , Figure 4B and Figure 4C The internal structure of the release operation assembly 400 of the frame 10 under different operating states is shown. Figure 4D and Figure 4E These are enlarged cross-sectional views of the unlocking operation assembly 400 of the frame 10 in different operating states.

[0235] The release operation assembly 400 includes a safety lock 410 for operation, a sliding sleeve 420, a lever 430, a slide groove 440, and a limit member 450.

[0236] A sliding sleeve 420 is disposed on the rider assembly 100. A sliding sleeve groove 110 is formed on the rider assembly 100. A portion of the sliding sleeve 420 passes through the sliding sleeve groove 110 and is disposed inside the rider assembly 100, and is fixedly connected to one end of the pull rod 430. The other end of the pull rod 430 is fixedly connected to the first locking member 511 of the first joint assembly 510. The sliding sleeve 420 can slide along the rider assembly 100, and the sliding stroke of the sliding sleeve 420 is limited by the sliding sleeve groove 110.

[0237] Safety lock 410 is pivotally mounted on a sliding sleeve 420 outside the rider assembly 100 about a pivot point for user operation. Safety lock 410 includes a button 411, a locking pin 412, and a locking spring 413. The button 411 and locking spring 413, along with the locking pin 412, are respectively located on opposite sides of the pivot point (e.g., ...). Figure 4D Alternatively, the locking pin 412 and the locking spring 413, along with the button 411, may be located on opposite sides of the fulcrum (e.g., Figure 4E A locking spring 413 is positioned between the button 411 and the sliding sleeve 420. One end of the locking pin 412 is connected to the button 411, and the other end is engaged with the rider assembly 100. The locking spring 413 applies a continuous elastic force to the button 411, holding the locking pin 412 in the engaged position with the rider assembly 100. Pressing the button 411 downwards against the elastic force of the locking spring 413 disengages the locking pin 412 from the engaged position with the rider assembly 100.

[0238] exist Figures 4A-4E In this design, a groove 440 is disposed on the pull rod 430, and a limiting member 450 passing through the groove 440 is fixed on the rider assembly 100 to guide and limit the movement of the pull rod 430. The limiting member 450 may be a cylinder protruding from the tubular inner surface of the rider assembly 100, or a pin passing through the rider assembly 100; this disclosure is not limited thereto. The groove 440 includes a first groove 441 and a second groove 442. However, the number of grooves and limiting members is not limited. Correspondingly, the limiting member 450 may include a first limiting member 451 and a second limiting member 452. By pressing button 411 to unlock the sliding sleeve 420, the sliding sleeve 420 can be pulled away from the first joint assembly 510, causing the pull rod 430 to move along with it, and moving the first locking member 511 of the first joint assembly 510. The first limiting member 451 slides in the first sliding groove 441, and the second limiting member 452 slides in the second sliding groove 442. In other embodiments, the sliding groove 440 can be provided on the inner surface of the rider assembly 100, and the limiting member 450, which engages and slides with the sliding groove 440, is correspondingly provided on the pull rod 430.

[0239] Regarding the release operation component 400, combined with... Figures 25A-30 A specific configuration of the upper and lower support members is shown, and this disclosure proposes a variant embodiment as follows. For the sake of brevity, configurations identical to those of the aforementioned release operation component 400 will be omitted or briefly described below.

[0240] See Figures 28-30 Unlike the previous embodiments, in this embodiment, the release operation assembly 400, in addition to the first limiting member 451 and the second limiting member 452, also has a third limiting member 453 and a fourth limiting member 454. The lever 430, in addition to the first sliding groove 441 and the second sliding groove 442, also has a first inclined groove 443 and a second inclined groove 444. As mentioned earlier, the first sliding groove 441 and the second sliding groove 442 extend along the longitudinal direction of the rider assembly 100, while the first inclined groove 443 and the second inclined groove 444 are parallel to each other and extend in a direction inclined relative to the longitudinal direction of the rider assembly 100.

[0241] The first limiting member 451, the second limiting member 452, the third limiting member 453, and the fourth limiting member 454 are respectively disposed in the first sliding groove 441, the second sliding groove 442, the first inclined groove 443, and the second inclined groove 444, and can slide therein. A first engaging member 461 and a second engaging member 462 are disposed on the pull rod 430, which are fixedly connected to the third limiting member 453 and the fourth limiting member 454 respectively, and can move with them. As mentioned above, releasing the safety lock 410 pulls the sliding sleeve 420, thereby causing the pull rod 430 to slide. The first limiting member 451 and the second limiting member 452 move along the first sliding groove 441 and the second sliding groove 442 respectively, and the third limiting member 453 and the fourth limiting member 454 move along the first inclined groove 443 and the second inclined groove 444 respectively, thereby causing the engaging member 460 to extend or retract in the lateral direction of the rider assembly 100 (see...). Figure 29 This allows the corresponding recess on the slider 534 to be released and locked in place (see...). Figure 30 ).

[0242] See Figure 30 The sliding member 534 has inclined surfaces at both ends along the opening groove 120. When sliding along the opening groove 120, it can push the first locking member 461 and the second locking member 462, and can engage with the first locking member 461 and the second locking member 462 without pulling the pull rod.

[0243] See also Figures 29-30A pull rod spring 470 is provided between the first engaging member 461 and the second engaging member 462, allowing the first engaging member 461 and the second engaging member 462 to not extend or retract simultaneously, thereby reducing the force required to pull the pull rod 430. Furthermore, when the sliding member 534 engages with the second engaging member 462, only the pull rod 430 needs to be pulled away from the first joint assembly 510 to release the sliding member 534 from the second engaging member 462; there is no need to simultaneously extend or retract the first engaging member 461, thus reducing wear on the pull rod 430.

[0244] In one embodiment, a first engaging member 461 and a second engaging member 462 are provided on the side of the pull rod 430 facing the slot 120 to engage with the sliding member 534 to achieve positioning engagement of the frame 10 in different states.

[0245] Specifically, the positions of the first locking member 461 and the second locking member 462 on the pull rod 430 are designed such that:

[0246] When the rider assembly 100 pivots relative to the first joint assembly 510 to the position where the first engaging member 461 inserts into the sliding member 534, the frame 10 is locked in the push-cart state (e.g., Figure 26 (as shown);

[0247] When the rider assembly 100 pivots relative to the first joint assembly 510 to the position where the second engaging member 462 inserts into the sliding member 534, the frame 10 is locked in a trailer position (e.g., Figure 31 (as shown);

[0248] When the rider assembly 100 pivots relative to the first joint assembly 510 to a position other than the first engagement 461 and the second engagement 462 of the upper support 530, the frame 10 is in an unlocked intermediate state.

[0249] [Frame folding / folding operation]

[0250] Based on the above explanation, the following is a brief explanation of the folding operation method of the frame 10, taking the case where the frame 10 is initially in the push state as an example.

[0251] When the frame 10 is in the push position, the release mechanism 400 locks the frame 10 in this position. To fold the frame 10 into a trailer or storage position, the following operations can be performed:

[0252] First, the locked state of the frame 10 is changed to the unlocked state by the unlocking operation component 400.

[0253] For example, by pressing the safety lock 410 of the release operation component 400, the locking pin 412 of the safety lock 410 is disengaged from the rider assembly 100 (specifically, the support rod portion 160 of the rider assembly 100), thereby allowing the slide sleeve 420 to release and slide upward along the rider assembly 100.

[0254] Next, by pushing the sliding sleeve 420 upward, the pull rod 430 is moved upward, simultaneously causing the first locking member 511 of the retracting assembly 500 to disengage from the first joint assembly 510 (e.g., Figures 1-23A (as shown in the embodiment) or disengage the slider 534 from the engagement of the engaging member 460, which can retract in the lateral direction of the rider assembly 100 (e.g.) Figures 25A-31 The embodiment shown enables the rider assembly 100 to pivot and approach the rear foot assembly 200 in a four-bar linkage configuration formed by the first joint assembly 510 and the upper support 530 with the rider assembly 100 and the rear foot assembly 200, thereby switching the frame 10 to a trailer state.

[0255] Then, the rider assembly 100 continues to pivot and move closer to the rear foot assembly 200. At this time, the pull line 5211 connecting the first joint assembly 510 and the second joint assembly 520 comes into play, releasing the second joint assembly 520 connecting the rear foot assembly 200 and the chassis assembly 300. This allows the rear foot assembly 200 to pivot and move closer to the chassis assembly 300 in conjunction with the related actions of the four-bar linkage structure formed by the second joint assembly 520 and the lower support 530, the rear foot assembly 200, and the chassis assembly 300, thus switching the frame 10 to the stowed state.

[0256] Based on the folding operation of the frame 10, if other related components or accessories connected to the frame 10 also have folding functions or additional installation and disassembly functions, they can be folded or disassembled as appropriate according to the folding process of the frame 10, as long as they do not interfere with each other.

[0257] Obviously, the process described above can be reversed without departing from the scope of this disclosure.

[0258] Other accessories: tow bar assembly, tray, seat cushion, basket, etc.

[0259] The following will describe the tow bar assembly 30 and its connection with the frame 10.

[0260] Figure 10 This is a schematic diagram of the tow bar assembly 30 being installed on the frame 10. Figure 11 This is a side view of the vehicle frame 10 with the tow bar assembly 30 installed in a trailer configuration. Figure 12 This is a schematic diagram of another embodiment in which the tow bar assembly 30 is mounted on the frame 10. Figure 13This is a 3D schematic diagram of the tow bar assembly. Figure 14 This is a partial cross-sectional schematic diagram of a portion of the frame 10, in which the tow bar assembly 30 is shown in an exploded manner.

[0261] See Figures 10-14 The tow bar assembly 30 can be a telescopic tow bar, and the telescopic portion of the tow bar assembly 30 can be fixed by a spring plate. One end of the tow bar assembly 30 is provided with a pull ring for the user to hold, and the other end can be provided with a fixing pin 31 for connecting the tow bar assembly 30 to the vehicle frame 10.

[0262] return Figure 1 The base frame assembly 300 may be provided with a tow rod mounting hole 310. The tow rod mounting hole 310 may be located at the middle position of the longitudinal front side of the base frame assembly 300. The fixing pin 31 of the tow rod assembly 30 may be fixedly installed into the tow rod mounting hole 310.

[0263] See also Figures 10-14 ,in particular Figure 14 A quick-release handle 311 may be provided at the tow bar mounting hole 310. The quick-release handle 311 may be located on the lower surface of the underframe assembly 300. The quick-release handle 311 may act as a locking element, disengaging from the locking recess on the fixing pin 31 of the tow bar assembly 30. By pulling the quick-release handle 311, it disengages from the locking recess on the fixing pin 31 of the tow bar assembly 30, thereby allowing the tow bar assembly 30 to be removed from the frame.

[0264] The quick-release handle 311 is biased toward the upper surface of the base frame assembly 300 by an elastic element, so that the quick-release handle 311 and the fixing pin 31 of the drag bar assembly 30 are always engaged.

[0265] Figures 15-16 This is a perspective view of the frame 10 according to one embodiment, the difference being that... Figure 16 A roof bracket 800 was installed on the frame 10. Figure 17 This is a side view of the frame 10, in which the frame 10 is in a pushcart position and the roof support 800 is in an unfolded position. Figure 18 This is a 3D view of the chassis 10, in which the chassis 10 is in a trailer state and the roof support 800 is in an unfolded state. Figure 19 This is a side view of the frame 10, in which the frame 10 is in a second folded state and the roof support 800 is in an unfolded state. Figures 20-22 This is a side view of frame 10, with all the supports in their retracted state. The difference between the three is... Figure 20 The driver's assembly 100 and the seat support assembly 600 were not folded down. Figure 21 The driver's seat assembly is folded down to 100%, but the seat support assembly is not folded down to 600%. Figure 22Both the driver's assembly 100 and the seat support assembly 600 are folded down. Figure 23A The associated structure of the first joint assembly 510 and the second joint assembly 520 of the frame 10 is shown, wherein the retraction joint of the seat support assembly 600 is on the side of the first joint assembly 510 away from the rider assembly 100.

[0266] Figures 20-22 The different states of the frame 10 when the bracket is in its stowed state are also shown. Figure 20 The image shows the state of the frame 10 when the support is in the stowed state, with the rider assembly 100 and seat support assembly 600 not retracted. The rider assembly 100 and the base assembly 300 are basically parallel, and their stowed height H and stowed width W are relatively large, for example, the stowed height H is 390mm and the stowed width W is 1050mm. Figure 21 The diagram shows the state of the frame 10 when the support is in the stowed state, with the rider assembly 100 folded to the upper left and the seat support assembly 600 not folded. At this time, the rider assembly 100 and the base frame assembly 300 are basically parallel, and the stowage width W can be reduced while keeping the stowage height H from increasing. The stowage height H is, for example, 390 mm and the stowage width W is, for example, 962 mm. Figure 22 The diagram shows the state of the frame 10 when the support is in the stowed state, with the rider assembly 100 folded to the upper left and the seat support assembly 600 folded to the upper right. The rider assembly 100 and the base frame assembly 300 are basically parallel, and the stowage width W can be further reduced while keeping the stowage height H from increasing, achieving a stowage height H of, for example, 390 mm and a stowage width W of, for example, 850 mm.

[0267] See 33A- Figure 33B , Figures 34A-34B When the chassis 10 is in trailer mode, a pallet 40 can be mounted on the chassis 10. For example... Figure 32 As shown, the tray 40 has tray engaging members 41 on both lateral sides. Figure 33B , Figure 34C As shown, the tray engaging member 41 can be detachably engaged and fixed to the tray mounting seat 42 provided on the frame 10. The tray mounting seat 42 can be provided inside the seat support assembly 600 near the armrest assembly 700. The tray 40 can be formed into an arc-shaped flange around its perimeter, and cylindrical recesses can be formed on both lateral sides. A middle recess of different depth can be formed between the two cylindrical recesses, thereby forming multiple spaced areas.

[0268] In one embodiment, two seat cushions 60 can be placed in the frame 10 in trailer configuration, such as... Figure 36As shown. The seat cushion 60 may include a seat cushion portion and a backrest. The seat cushion portion is supported by the base frame assembly 300 of the frame 10, and the backrest rests against the lateral sides of the seat support assembly 600, thereby allowing two infants to sit at the same time.

[0269] In one embodiment, a basket 50 can be placed in the frame 10 in trailer configuration. For example... Figure 35 As shown, the basket 50 has a basket pivot joint 51 and a basket back hook 52. The front edge of the basket 50 abuts against the lateral side of the seat support assembly 600, the basket pivot joint 51 abuts against the rider assembly 100, and the basket back hook 52 of the basket 50 hooks onto the edge of the tray 40, so that the basket 50 can be stably mounted on the frame 10.

[0270] In one embodiment, a basket 50 can be placed in the frame 10 in the trolley state. The back of the basket rests against the armrest assembly 700, and the front of the basket 50 is fastened to the frame 10 by a fastening strap, so that the basket 50 can be stably placed on the frame 10.

[0271] This disclosure also includes, but is not limited to, the following embodiments:

[0272] Item 1. A collapsible bracket for a vehicle frame, the collapsible bracket comprising:

[0273] Driver's Package 100;

[0274] Rear foot assembly 200;

[0275] Base frame assembly 300; and

[0276] The folding component 500 is movably connected between the rider assembly 100 and the rear leg assembly 200, and between the rear leg assembly 200 and the chassis assembly 300, such that the foldable bracket and the chassis therefrom are in a pusher state where the rider assembly 100 is fully extended relative to the chassis assembly 300, a trailer state where the rider assembly 100 is partially folded relative to the chassis assembly 300, and a stowed state where the rider assembly 100 is fully folded relative to the chassis assembly 300.

[0277] Project 2. The collapsible bracket as described in Project 1,

[0278] In the trolley state, the rider assembly 100, the rear foot assembly 200, and the base frame assembly 300 are arranged at an angle to each other in their longitudinal directions;

[0279] In the trailer configuration, the rider assembly 100 and the underframe assembly 300 are arranged approximately parallel in their longitudinal directions, but at an angle to the longitudinal direction of the rear foot assembly 200.

[0280] In the stowed state, the rider assembly 100, the rear foot assembly 200, and the chassis assembly 300 are arranged approximately parallel to each other in their longitudinal directions.

[0281] Item 3. According to the collapsible bracket described in Item 1, the collapsible assembly 500 includes:

[0282] The first joint assembly 510 is pivotally connected to the rider assembly 100 and the rear foot assembly 200;

[0283] The second joint assembly 520 is pivotally connected to the rear leg assembly 200 and the base frame assembly 300;

[0284] Upper support member 530, the two ends of which are movably connected to the rider assembly 100 and the rear foot assembly 200 respectively at positions spaced apart from the first joint assembly 510; and

[0285] The lower support member 540 has two ends that are movably connected to the rear foot assembly 200 and the base frame assembly 300 at positions spaced apart from the second joint assembly 520.

[0286] Project 4. The collapsible bracket according to Project 3, characterized in that the collapsible bracket further includes a release operation component 400, which is disposed on the handlebar assembly 100 and can slide along the longitudinal direction of the handlebar assembly 100 to releasely engage and lock with the collapsible component 500, thereby locking the collapsible bracket in a pushcart state or a trailer state.

[0287] When the release operation component 400 is unlocked from the retraction component 500, the rider component 100 can pivot relative to the rear foot component 200 through the retraction component 500, and can further drive the rear foot component 200 to pivot relative to the underframe component 300.

[0288] Item 5. According to the collapsible bracket described in Item 4, the release operation assembly 400 includes:

[0289] A sliding sleeve 420 is mounted on the rider assembly 100 and can slide along the longitudinal direction of the rider assembly 100;

[0290] A pull rod 430 is disposed within the rider assembly 100 and extends along the longitudinal direction of the rider assembly 100. One end of the pull rod 430 is fixedly connected to the sliding sleeve 420, and the other end of the pull rod 430 is connected to the retracting assembly 500; and

[0291] A safety lock 410 is provided on the sliding sleeve 420 to releasably engage and lock the sliding sleeve 420 onto the rider assembly 100.

[0292] When the safety lock 410 is released, the sliding sleeve 420 can slide along the longitudinal direction of the rider assembly 100, thereby causing the pull rod 430 to slide toward or away from the retracting assembly 500.

[0293] Item 6. According to the collapsible bracket described in Item 5, the release operation assembly 400 further includes:

[0294] One or more limiting members 450 are disposed on either the pull rod 430 or the rider assembly 100; and

[0295] One or more corresponding grooves 440 extend along the longitudinal direction of the rider assembly 100 and are disposed on the other of the lever 430 and the rider assembly 100, allowing the one or more limiting members 450 to slide thereon.

[0296] Item 7. According to the collapsible bracket described in Item 5, the safety lock 410 includes a button 411 that can pivot about a transverse axis. The button 411 has a pressing part 413 that is constantly subjected to an elastic restoring force resisting pressing at both ends around the transverse axis, and a locking pin 412 that is inserted into the pull rod 430 and is in a locked position. When the pressing part 413 is pressed down against the elastic restoring force, the button 411 pivots, and the locking pin 412 can disengage from the pull rod 430 and be in an unlocked position, so that the sliding sleeve 420 can slide along the rider assembly 100.

[0297] Item 8. According to the collapsible bracket of Item 5, the first joint assembly 510 of the collapsible assembly 500 includes:

[0298] The first locking part 512 is fixedly connected to the end of the rear foot assembly 200 adjacent to the first locking part 512, and is connected to the end of the rider assembly 100 adjacent to the first locking part 512 in a manner that allows it to pivot about a first retraction axis S extending laterally relative to the longitudinal direction of the rider assembly 100; and

[0299] The first locking member 511 has one end connected to the pull rod 430, and the other end is constantly subjected to an elastic biasing force against the first locking part 512, so as to release and lock with the first locking part 512.

[0300] Item 9. According to the collapsible bracket described in Item 8, a first locking hole 5121 and a second locking hole 5122 are included on the circumference of the first locking part 512 for inserting and engaging the other end of the first locking member 511.

[0301] When the rider assembly 100 pivots relative to the first locking part 512 until the first locking member 511 is inserted into the first locking hole 5121, the collapsible bracket is locked in the trolley state.

[0302] When the driver assembly 100 pivots relative to the first locking part 512 until the first locking member 511 is inserted into the second locking hole 5122, the retractable bracket is locked in the trailer state.

[0303] Item 10. According to the collapsible bracket of Item 8, the second joint assembly 520 of the collapsible assembly 500 includes:

[0304] The second locking part 522 is fixed to the base frame assembly 300 and pivotally connected to the rear leg assembly 200 in a manner that allows it to pivot about a second retraction axis T that extends laterally relative to the longitudinal direction of the base frame assembly 300; and

[0305] The second locking member 521 has one end slidably connected to the first locking part 512, and the other end releasably engaged with the second locking part 522 for locking.

[0306] Item 11. According to the collapsible bracket of Item 10, the second locking member 521 includes:

[0307] The pull line 5211 extends along the longitudinal direction of the rear foot assembly 200, and one end of it is slidably connected to the first locking part 512.

[0308] A tension line fixing member 5212 is slidably installed within the rear leg assembly 200 along its longitudinal direction. The other end of the tension line is fixed to the tension line fixing member 5212 to drive the tension line fixing member 5212 to slide. A second spring 5225 is provided between the tension line fixing member 5212 and a pivot shaft extending along the second retraction axis (T), so that the tension line 5211 is constantly subjected to a tensile elastic force.

[0309] Locking block 5213 is disposed on the pull line fixing member 5212 and can slide with the pull line fixing member 5212. Locking block 5213 can extend laterally from the rear foot assembly 200 into the second locking part 522 to lock the rear foot assembly 200 and the base frame assembly 300.

[0310] Item 12. According to the collapsible bracket of Item 11, the second locking part 522 includes:

[0311] Card holder 5221 is fixed to the base frame assembly 300, and a first engaging part 5226 with a radially outward opening is provided on the periphery of the card holder 5221;

[0312] The fixing seat 5222 is fixed to the rear foot assembly 200 and pivotally mounted on the card holder 5221. A second engaging portion 5227 with a radially outward opening is provided on the periphery of the fixing seat 5222. The locking block 5213 can release and engage the first engaging portion 5226 and the second engaging portion 5227 to lock the card holder 5221 and the fixing seat 5222, thereby locking the rear foot assembly 200 and the base frame assembly 300.

[0313] Item 13. The collapsible bracket according to Item 10, wherein the second locking member 521 includes:

[0314] The pull line 5211 extends along the longitudinal direction of the rear foot assembly 200, and one end of it is slidably connected to the first locking part 512.

[0315] A tension line fixing member 5212 is slidably installed within the rear leg assembly 200 along its longitudinal direction. The other end of the tension line is fixed to the tension line fixing member 5212 to drive the tension line fixing member 5212 to slide. A second spring 5225 is provided between the tension line fixing member 5212 and a pivot shaft 5224 extending along the second retraction axis T, so that the tension line 5211 is constantly subjected to a tensile elastic force.

[0316] The locking pin 5214 has one end inserted and fixed to the pull line fixing member 5212, and the other end inserted into the guide groove 5228 provided on the second locking part 522. The guide groove 5228 has a radial section and a circumferential section, so that the locking pin 5214 can move along the radial section and then along the circumferential section of the guide groove 5228 while sliding with the pull line fixing member 5212, thereby changing the locked state of the rear foot assembly 200 and the base frame assembly 300 to the unlocked state.

[0317] Item 14. The collapsible bracket according to Item 13, wherein the second locking part 522 includes:

[0318] Card holder 5221 is fixed to the base frame assembly 300;

[0319] The fixing seat 5222 is fixed to the base frame assembly 300 and faces the pull line fixing member 5212, and the guide groove 5228 is disposed on the fixing seat 5222.

[0320] Item 15. According to the collapsible bracket described in Item 10, the lower end of the upper support member 530 and the upper end of the lower support member 540 are both movably connected to the rear foot assembly 200 at a position between the first joint assembly 510 and the second joint assembly 520; and the upper end of the upper support member 530 is movably connected to the rider assembly 100, and the lower end of the lower support member 540 is movably connected to the base frame assembly 300.

[0321] Item 16. According to the collapsible bracket described in Item 15, the upper support member 530 includes a first support member 531 and a second support member 532. The first end of the upper support member 530 is the first end of the first support member 531, and the second end of the upper support member 530 is the second end of the second support member 532. The first end of the first support member 531 is pivotally connected to the rider assembly 100, the second end of the first support member 531 is pivotally connected to the first end of the second support member 532, and the second end of the second support member 532 is pivotally connected to the rear foot assembly 200.

[0322] Item 17. According to the collapsible bracket described in Item 15, the upper support member 530 is a single piece, the rider assembly 100 has an opening groove 120 in the longitudinal direction, the first end of the upper support member 530 is pivotally connected to a sliding member 534, the sliding member 534 can slide along the opening groove 120, and the second end of the upper support member 530 is pivotally connected to the rear foot assembly 200.

[0323] Item 18. According to the collapsible bracket described in Item 17, the release operation assembly 400 further includes:

[0324] One or more engaging members 460 are disposed on the pull rod 430; and

[0325] One or more corresponding inclined grooves 443, 444 extend in a direction inclined relative to the longitudinal direction of the rider assembly 100, allowing the one or more limiting members 453, 454 to slide thereon.

[0326] The sliding of the pull rod 430 causes the limiting members 453 and 454 to move along the inclined grooves 443 and 444, thereby causing the locking member 460 to extend or retract in the lateral direction of the rider assembly 100, so as to releasely engage and lock with the corresponding recess of the sliding member 534.

[0327] Item 19. According to the collapsible bracket described in Item 16, the lower support member 540 includes a third support member 541 and a fourth support member 542. The first end of the third support member 541 is pivotally connected to the rear foot assembly 200, the second end of the third support member 541 is pivotally connected to the first end of the fourth support member 542, and the second end of the fourth support member 542 is pivotally connected to the base frame assembly 300.

[0328] Item 20. According to the collapsible bracket of Item 19, the first end of the third support 541 is closer to the first joint assembly 510 than the second end of the upper support 530.

[0329] Item 21. According to the collapsible bracket described in Item 19, the first end of the third support member 541 and the second end of the upper support member 530 are pivotally connected to the rear foot assembly 200 at the same pivot point 560. An arc-shaped groove 533 extending around the pivot point is provided at the lower part of the second end of the upper support member 530 and below the pivot point 560. The rivet 543 fixed at the corresponding part of the third support member 541 can be slidably inserted into the arc-shaped groove 533 and can slide along the arc-shaped groove 533.

[0330] Item 22. According to the collapsible bracket described in Item 1, the upper part of the rider assembly 100 can be bent upwards and folded away.

[0331] Item 23. A frame, the frame 10 comprising a collapsible bracket according to any one of items 1-22, a seat support assembly 600 and an armrest assembly 700, the seat support assembly 600 and the armrest assembly 700 being fixedly connected to the rider assembly 100 so as to rotate synchronously with the rotation of the rider assembly 100, wherein wheels 20 are respectively mounted on the rear foot assembly 200 and the base frame assembly 300.

[0332] Item 24. According to the frame described in Item 23, the lower part of the seat support assembly 600 can be bent upwards and folded.

[0333] Item 25. According to the vehicle frame described in Item 23, the underframe assembly 300 further includes a trailing rod mounting hole 700, through which the trailing rod assembly 30 is mounted on the underframe assembly 300.

[0334] Item 26. According to the frame described in Item 23, in the trailer configuration, a tray 40 is horizontally positioned near the handrail assembly 700.

[0335] Item 27. A stroller comprising a frame provided according to any one of items 23-26.

[0336] In addition to the accessories mentioned above, those skilled in the art can provide any accessories that can be installed in different states of the frame according to actual needs, and are not limited to those listed in this disclosure.

[0337] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0338] Although this disclosure has been described with reference to exemplary embodiments, the terminology used is descriptive and exemplary, and not restrictive. Because this disclosure can be embodied in many forms without departing from its spirit and essence, it should be understood that the above embodiments are not limited to any of the foregoing details, and technical features between different embodiments may be selected, deleted, or added to each other as reasonably expected. Therefore, it should be interpreted most broadly within the scope defined by the claims, and all variations falling within the scope of the claims or their equivalents should be covered by the claims.

Claims

1. A collapsible support for a vehicle frame, characterised in that, The collapsible support comprises: a handle assembly; a rear leg assembly; a base assembly; and a collapsing assembly movably coupled between the handle assembly and the rear leg assembly and between the rear leg assembly and the base assembly, such that the collapsible support and the frame thereof are in a fully unfolded stroller state with the handle assembly unfolded relative to the base assembly, a semi-collapsed trailer state with the handle assembly semi-collapsed relative to the base assembly, and a fully collapsed storage state with the handle assembly collapsed relative to the base assembly.

2. The collapsible stand of claim 1, wherein, The collapsing assembly comprises: a first joint assembly pivotally connecting the handle assembly and the rear leg assembly; a second joint assembly pivotally connecting the rear leg assembly and the base assembly; an upper support member having two ends movably coupled to the handle assembly and the rear leg assembly at positions spaced apart from the first joint assembly; and a lower support member having two ends movably coupled to the rear leg assembly and the base assembly at positions spaced apart from the second joint assembly.

3. The collapsible stand of claim 2, wherein, The collapsible support further comprises a release operation assembly provided on the handle assembly and slidable along a longitudinal direction of the handle assembly to releasably lock with the collapsing assembly, thereby locking the collapsible support in the stroller state or the trailer state. When the release operation assembly is unlocked from the collapsing assembly, the handle assembly is pivotable relative to the rear leg assembly via the collapsing assembly, and the rear leg assembly is further pivotable relative to the base assembly via the collapsing assembly.

4. The collapsible stand of claim 3, wherein, The release operation assembly comprises: a sliding sleeve mounted on the handle assembly and slidable along a longitudinal direction of the handle assembly; a pull rod provided in the handle assembly and extending along the longitudinal direction of the handle assembly, one end of the pull rod being fixedly connected to the sliding sleeve, and the other end of the pull rod being connected to the collapsing assembly; and a safety lock provided on the sliding sleeve to releasably lock the sliding sleeve on the handle assembly. When the safety lock is unlocked, the sliding sleeve is slidable along the longitudinal direction of the handle assembly, thereby driving the pull rod to slide towards or away from the collapsing assembly.

5. The collapsible stand of claim 4, wherein, The first joint assembly of the collapsing assembly comprises: a first locking portion fixedly connected to an end of the rear leg assembly adjacent to the first locking portion and pivotally connected to an end of the handle assembly adjacent to the first locking portion about a first collapsing axis extending transversely relative to a longitudinal direction of the handle assembly; and a first locking member having one end connected to the pull rod and the other end releasably locked with the first locking portion under a constant elastic biasing force.

6. The collapsible stand of claim 5, wherein, The second joint assembly of the collapsing assembly comprises: a second locking portion fixed to the base assembly and pivotally connected to the rear leg assembly about a second collapsing axis extending transversely relative to a longitudinal direction of the base assembly; and a second locking member having one end slidably connected to the first locking portion and the other end releasably locked with the second locking portion.

7. The collapsible stand of claim 6, wherein, The lower support member comprises a third support member and a fourth support member, a first end of the third support member is pivotally connected with the rear leg assembly, a second end of the third support member is pivotally connected with a first end of the fourth support member, and a second end of the fourth support member is pivotally connected with the chassis assembly.

8. The collapsible stand of claim 7, wherein, The first end of the third support member is pivotally connected with the second end of the upper support member at the same pivot point of the rear leg assembly, and an arc-shaped slot extending around the pivot point is arranged at a lower part of the second end of the upper support member and below the pivot point, a rivet fixed at a corresponding part of the third support member is slidably arranged in the arc-shaped slot and can slide along the arc-shaped slot.

9. A vehicle frame, characterized by The vehicle frame comprises the foldable support member according to any one of claims 1-8, a seat support assembly and an armrest assembly, the seat support assembly and the armrest assembly are fixedly connected with the handlebar assembly so as to be synchronously rotatable with the handlebar assembly, and wheels are respectively arranged on the rear leg assembly and the chassis assembly.

10. A stroller, characterized in that, The baby carriage comprises the vehicle frame according to claim 9.

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