Trolley

Abstract

The trolley comprises a foldable trolley frame and a seat, the foldable trolley frame comprises a supporting assembly capable of being oppositely unfolded and folded, a first locking mechanism used for keeping the supporting assembly unfolded, an adaptive seat and an adaptive seat locking piece, and the adaptive seat is rotatably connected to the supporting assembly; the adapter seat locking piece is arranged on the adapter seat and used for unlocking the first locking mechanism when rotating relative to the supporting assembly, and the adapter seat locking piece has a locking state acting on the adapter seat and limiting rotation of the adapter seat relative to the supporting assembly and a relative unlocking state; the seat comprises a seat plate combined with the adaptive seat, a backrest rotationally connected to the seat plate around a first axis through a rotating joint, and an unlocking mechanism, and the unlocking mechanism is used for driving the adaptive seat locking piece to be switched to an unlocking state. The unlocking mechanism can unlock the adaptive seat locking piece and the first locking mechanism at the same time, so that the seat can be synchronously rotated and folded along with the adaptive seat due to gravity, folding of the seat is completed, then the supporting assembly can be folded, and folding operation is more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of child strollers, in particular to a stroller. Background Art

[0002] The existing trolley includes a frame and a seat mounted on the frame, wherein the seat includes a seat plate and a backrest that are rotatably matched, wherein the seat itself has a storage state in which the backrest is close to the seat plate and a use state in which the backrest is far away from the seat plate, as well as a folding state and an unfolding state in which the seat rotates relative to the frame. The seat also includes an adapter that is rotatably connected to the seat plate or the backrest, and the adapter is detachably connected to the frame. When folding, the backrest is released to allow the backrest to rotate relative to the seat plate, and during the rotation process, the restriction between the unlocking and the adapter is unlocked, allowing the seat plate and the backrest to rotate relative to the adapter to complete the folding of the seat, and finally the frame is folded separately. Utility Model Content

[0003] The present application provides a trolley which is more convenient to fold.

[0004] The present application provides a trolley, comprising:

[0005] A foldable frame, comprising a support assembly that can be relatively unfolded and folded, a first locking mechanism for keeping the support assembly unfolded, an adapter seat and an adapter seat locking member, wherein the adapter seat is rotatably connected to the support assembly and unlocks the first locking mechanism when the adapter seat rotates relative to the support assembly, and the adapter seat locking member has a locking state for acting on the adapter seat to limit the rotation of the adapter seat relative to the support assembly and a relative unlocking state;

[0006] The seat comprises a seat plate combined with the adapter seat, a backrest rotatably connected to the seat plate around a first axis, and a release mechanism, wherein the release mechanism is used to drive the adapter seat locking member to switch to a release state.

[0007] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0008] Optionally, the lock release mechanism includes:

[0009] A first unlocking member, movably disposed on the backrest;

[0010] A first transmission member, rotatably disposed on the seat plate and / or the backrest around a first axis, and linked to the first unlocking member;

[0011] The linking member is slidably arranged on the seat plate and / or the backrest along the first axis and is linked with the first transmission member. The linking member has a second driving part that applies a releasing force to the adapter seat locking member.

[0012] Optionally, the seat further comprises:

[0013] A second locking mechanism, disposed between the backrest and the seat plate, for maintaining the backrest at different inclination angles relative to the seat plate, the second locking mechanism comprising a plurality of locking grooves disposed on the seat plate and arranged around the first axis, and a locking member movably disposed on the backrest and adapted to the locking grooves;

[0014] The second unlocking member is used to release the second locking mechanism. The second unlocking member is movably arranged on the backrest and linked with the locking member.

[0015] Optionally, the seat further comprises:

[0016] The second transmission member is arranged between the first transmission member and the locking member, and the first transmission member rotates and drives the locking member to exit the locking groove through the second transmission member.

[0017] Optionally, the foldable frame includes a trigger member slidably disposed on the adapter seat along the rotation axis of the adapter seat, and the release mechanism indirectly drives the adapter seat locking member to switch to a release state through the trigger member.

[0018] Optionally, the adapter seat and the seat are detachably connected, the adapter seat is provided with a groove, the trigger member is embedded in the groove, when the seat is combined with the adapter seat, the trigger member is covered by the seat, when the seat is separated from the adapter seat, the trigger member is exposed.

[0019] Optionally, the adapter seat has a first rotation direction and a second rotation direction opposite to each other relative to the supporting assembly, and the adapter seat has at least one first driving part. When the adapter seat rotates in any rotation direction, the first driving part unlocks the first locking mechanism.

[0020] Optionally, the support assembly includes a first element, a second element and a third element that are hinged to each other, one of the three is a front foot, another is a rear foot, and the rest is a handle;

[0021] The first locking mechanism comprises a first locking member and a second locking member, and the configurations of the two locking members are as follows:

[0022] The first locking member is movably disposed on the first element and has a locking state acting on the second element, and the second locking member is movably disposed on the first element and has a locking state acting on the third element;

[0023] Or the first locking member is movably provided on the second element and has a locking state acting on the first element, and the second locking member is movably provided on the third element and has a locking state acting on the first element;

[0024] The first locking member and the second locking member are unlocked independently or in conjunction with each other.

[0025] Optionally, the first locking member and the second locking member are slidably disposed on the first element, and the two locking members are linked to each other through a second inclined surface, the second element is provided with a second locking groove matched with the first locking member, and the third element is provided with a third locking groove matched with the second locking member;

[0026] When the adapter seat rotates, the first driving part acts on the first locking member to slide and unlock it, and the first locking member drives the second locking member to slide and unlock it through the second inclined surface.

[0027] Optionally, there are two first driving parts, and when the adapter seat is in a locked state, the two first driving parts are located on both sides of the first locking member;

[0028] When the adapter seat rotates along the first rotation direction, a first driving part acts on the first locking member to unlock the first locking mechanism;

[0029] When the adapter seat rotates along the second rotation direction, another first driving part acts on the first locking member to unlock the first locking mechanism.

[0030] The present application also provides a trolley, comprising a foldable frame and a seat, wherein the foldable frame comprises:

[0031] The support components can be relatively unfolded and folded.

[0032] An adapter seat rotatably connected to the support assembly;

[0033] An adapter seat locking member having a locking state for acting on the adapter seat to limit its rotation relative to the support assembly and a relative unlocking state;

[0034] The seat comprises:

[0035] A seat plate, combined with the adapter seat;

[0036] The backrest is connected to the seat plate by rotating the joint around the first axis.

[0037] A second locking mechanism, disposed between the backrest and the seat plate, for maintaining the backrest at different inclination angles relative to the seat plate;

[0038] A second unlocking member, used for releasing the second locking mechanism;

[0039] The release mechanism is used to release the adapter seat locking piece and the second locking mechanism at the same time.

[0040] Optionally, the lock release mechanism includes:

[0041] A first unlocking member, movably disposed on the backrest;

[0042] A first transmission member, rotatably disposed in the rotating joint and linked to the first unlocking member;

[0043] A linkage member is slidably disposed in the rotating joint and linked with the first transmission member, and the linkage member has a second driving part acting on the trigger member.

[0044] Optionally, the seat further comprises:

[0045] A second locking mechanism, disposed between the backrest and the seat plate, for maintaining the backrest at different inclination angles relative to the seat plate, the second locking mechanism comprising a plurality of locking grooves disposed on the seat plate and arranged around the first axis, and a locking member movably disposed on the backrest and adapted to the locking grooves;

[0046] A second unlocking member, movably disposed on the backrest and linked to the locking member;

[0047] The second transmission member is arranged between the first transmission member and the locking member. When the lock releasing mechanism releases the lock, the first transmission member rotates and drives the locking member to exit the lock slot through the second transmission member.

[0048] The present application also provides a foldable frame, comprising:

[0049] The support components can be relatively unfolded and folded.

[0050] a first locking mechanism having a locked state for keeping the support assembly unfolded, and a released state for allowing the support assembly to be folded;

[0051] An adapter seat, used for connecting the seat, the adapter seat being rotatably connected to the support assembly;

[0052] An adapter seat locking member having a locking state for acting on the adapter seat to limit its rotation relative to the support assembly and a relative unlocking state;

[0053] The triggering member is movably arranged on the adapter seat, and is used for receiving a releasing force and acting on the locking member of the adapter seat to release the locking member of the adapter seat.

[0054] The present application also provides a foldable frame, comprising:

[0055] The support components can be relatively unfolded and folded.

[0056] a first locking mechanism having a locked state for keeping the support assembly unfolded, and a released state for allowing the support assembly to be folded;

[0057] The adapter seat is used for connecting the seat. The adapter seat is rotatably connected to the support assembly, and when the adapter seat rotates relative to the support assembly, the first locking mechanism is unlocked.

[0058] The present application also provides a foldable frame, comprising:

[0059] The support components can be relatively unfolded and folded.

[0060] a first locking mechanism having a locked state for keeping the support assembly unfolded, and a released state for allowing the support assembly to be folded;

[0061] The first locking mechanism includes a first locking member and a second locking member, and the first locking member and the second locking member are linked to release.

[0062] The present application also provides a foldable frame, comprising:

[0063] A support assembly, which can be relatively unfolded and folded, and includes a first element, a second element and a third element which are hinged to each other, one of which is a front foot, another is a rear foot, and the rest is a handle;

[0064] The first locking mechanism has a locked state for keeping the support assembly unfolded, and an unlocked state for allowing the support assembly to be folded, the first locking mechanism includes a first locking member and a second locking member, and the configuration of the two locking members is as follows:

[0065] The first locking member is movably disposed on the first element and has a locking state acting on the second element, and the second locking member is movably disposed on the first element and has a locking state acting on the third element;

[0066] Or the first locking member is movably disposed on the second element and has a locking state acting on the first element, and the second locking member is movably disposed on the third element and has a locking state acting on the first element;

[0067] The first locking member and the second locking member are unlocked independently or in conjunction with each other.

[0068] The trolley of the present application operates the unlocking mechanism to simultaneously unlock the adapter seat locking member and the first locking mechanism, so that the seat can be rotated and folded synchronously with the adapter seat due to its own gravity, and the seat is folded. The supporting assembly can then be folded, making the folding operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 A structural view of a foldable frame according to an embodiment of the present application;

[0070] Figure 2 This is a structural view of a trolley according to an embodiment of the present application;

[0071] Figure 3 for Figure 2 Structural view with the middle seat folded;

[0072] Figure 4 for Figure 2 The structural view of the middle trolley in the folded state;

[0073] Figure 5 for Figure 1 An exploded view of the support assembly of the mid-frame, the adapter locking member and the adapter;

[0074] Figure 6 for Figure 1 An exploded view of the support assembly, adapter seat locking member and adapter seat at another viewing angle;

[0075] Figure 7 A front view of the adapter seat of the foldable frame of an embodiment of the present application when it is not rotated;

[0076] Figure 8 for Figure 7 A front view of the middle adapter seat rotating along a first rotation direction;

[0077] Fig. 9 for Figure 7 A front view of the middle adapter seat rotating along a second rotation direction;

[0078] Fig.10 An exploded view of three components in a support assembly of a vehicle frame according to an embodiment of the present application;

[0079] Fig.11 A front view of a seat of a trolley according to an embodiment of the present application;

[0080] Fig.12 for Fig.11 Right side view of the middle seat;

[0081] Fig.13 A structural view of a seat of a trolley according to an embodiment of the present application;

[0082] Fig.14 for Fig.13 Enlarged view of the middle D part;

[0083] Fig.15 for Fig.13 Enlarged view of middle E part;

[0084] Fig.16 for Fig.15 An enlarged view of the first unlocking member sliding to release the lock;

[0085] Fig.17 A partial exploded view of a seat of a trolley according to an embodiment of the present application;

[0086] Fig.18 for Fig.11 A partial cross-sectional view in the middle AA direction (when the release mechanism is not released);

[0087] Fig.19 for Fig.11 A partial cross-sectional view in the middle BB direction (when the release mechanism is not released);

[0088] Fig. 20 for Fig.11 A partial cross-sectional view in the middle AA direction (when the release mechanism is released);

[0089] Fig.21 for Fig.11 A partial cross-sectional view in the middle BB direction (when the release mechanism is released);

[0090] Fig. 22 for Fig.12 Partial cross-sectional view in the mid-CC direction (when installed on the frame);

[0091] Fig.23 An enlarged view of a seat of a trolley at an adapter according to an embodiment of the present application;

[0092] Fig.24 for Fig.23 The structural view of the adapter after half-section;

[0093] Fig.25 An exploded view of a seat of a trolley at an adapter according to an embodiment of the present application;

[0094] Fig.26 and Fig. 27 for Fig.25 A structural view of the third unlocking member;

[0095] Fig.28 for Fig.23 An enlarged view of the third unlocking member after sliding to release the lock;

[0096] Fig.29 for Fig.12 Partial cross-sectional view in the CC direction (after the third unlocking member has not slid to release the lock);

[0097] Fig.30 for Fig.12 A partial cross-sectional view in the CC direction (when installed on the frame, after the third unlocking member slides to release the lock);

[0098] Fig.31 An exploded view of a trolley at the handrail according to an embodiment of the present application.

[0099] The reference numerals in the figures are described as follows:

[0100] 1000, frame;

[0101] 100, support assembly; 110, rear foot; 111, fifth unlocking member; 120, front foot; 121, third locking groove; 122, second axis; 130, handle; 131, second locking groove; 141, first locking member; 142, second locking member; 143, second elastic member; 144, third elastic member; 150, connecting rod;

[0102] 200, adapter seat; 201, rotation axis; 202, first surface; 203, groove; 204, first locking groove; 205, guide groove;

[0103] 210, adapter locking member; 220, trigger member; 230, first driving part; 240, second slot;

[0104] 300, seat; 301, first axis; 310, seat plate; 311, locking groove;

[0105] 320, backrest; 321, lock; 323, guide block; 324, third driving part; 328, fourth elastic part; 329, fifth elastic part; 330, first unlocking part; 340, first transmission part; 341, first guide slope; 342, first slot; 350, linkage; 351, second driving part; 352, first part; 353, second part; 354, slide; 360, second transmission part; 370, armrest; 371, third locking part; 372, fourth locking slot; 380, second unlocking part;

[0106] 400, adapter; 410, block; 420, sixth elastic member; 430, third unlocking member; 431, operating portion; 432, slide slot; 433, first area; 434, second area;

[0107] 440, retaining member; 441, eighth elastic member; 442, first section; 443, second section;

[0108] 450, fourth unlocking part; 2000, trolley. DETAILED DESCRIPTION

[0109] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0110] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0111] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0112] In this application, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0113] See also Figures 1 to 10 The present application provides a trolley 2000, including a foldable frame, which is referred to as the frame 1000 for convenience of description. The frame 1000 includes a support assembly 100, a first locking mechanism, an adapter seat 200, and an adapter seat locking member 210. The frame 1000 can be installed with a vehicle (such as a seat) for carrying children, and the support assembly 100 is used to support the vehicle, and can be equipped with wheels for movement at the bottom, and a handle for the user to push. In addition, the support assembly 100 can be relatively unfolded and folded, and has an unfolded state and a folded state.

[0114] The first locking mechanism has a locking state that keeps the support assembly 100 unfolded, and an unlocking state that allows the support assembly 100 to be folded. The adapter seat 200 is used to connect a vehicle, and the vehicle in this embodiment takes a seat as an example. The adapter seat 200 is rotatably connected to the support assembly 100, and when it rotates relative to the support assembly 100, the first locking mechanism is unlocked. The external force that drives the adapter seat 200 to rotate can be artificially applied, or provided by the gravity of the vehicle, or provided by the gravity of the adapter seat itself. In order to ensure that the adapter seat 200 can rotate in a controllable manner, the adapter seat locking member 210 has a locking state that acts on the adapter seat 200 to limit its rotation relative to the support assembly 100, and correspondingly also has a release state that releases the action on the adapter seat 200.

[0115] The seat 300 has a stowed state in which the backrest 320 rotates close to the seat plate 310, and a use state in which the backrest 320 rotates away from the seat plate 310. The seat 300 also has a folded state in which the entire seat 300 rotates synchronously with the adapter seat 200 and close to the support assembly 100, and an unfolded state away from the support assembly 100.

[0116] The seat 300 is combined with the adapter seat 200, and the seat 300 includes a seat plate 310, a backrest 320 and a release mechanism. The seat plate 310 is used to support the child and is combined with the adapter seat 200. The backrest 320 is connected to the seat plate 310 by rotating around the first axis 301 through a rotating joint. The release mechanism is used to drive the adapter seat locking member 210 to switch to a released state.

[0117] The specific folding operation of the trolley is: operate the release mechanism to release the adapter seat locking piece and the first locking mechanism at the same time, so that the seat can be rotated and folded synchronously with the adapter seat, and the seat is folded. Then the support assembly can be folded, and the folding operation is more convenient.

[0118] As for the storage of the seat itself, a corresponding unlocking member may be independently configured, or preferably, the unlocking mechanism may be operated to complete the storage of the seat.

[0119] The key references Fig.14The release mechanism includes a first unlocking member 330, a first transmission member 340 and a linkage member 350. The first unlocking member 330 is movably arranged on the backrest 320. The first transmission member 340 is rotatably arranged on the seat plate 310 and / or the backrest 320 around the first axis 301 and is linked with the first unlocking member 330. For example, a steel wire is connected between the two. The linkage member 350 is slidably arranged on the seat plate 310 and / or the backrest 320 along the first axis 301 and is linked with the first transmission member 340. The linkage method is that the first transmission member 340 is provided with a first guide slope 341, the first guide slope 341 spirally extends around the first axis 301, and the linkage member 350 is provided with a second guide slope matched with the first guide slope 341. The linkage 350 has a second driving portion 351 for applying a release force to the adapter seat locking member 210, wherein the linkage 350 indirectly applies a release force to the adapter seat locking member 210 through the trigger member 220. In the figure, at least a portion of the first transmission member 340 and the linkage 350 are arranged in the backrest 320. The swivel backrest 320 is provided with a guide block 323 extending along the first axis 301, and the linkage 350 is provided with a slide groove 354 matched with the guide block 323, and the guide block 323 and the slide groove 354 cooperate with each other to keep the linkage 350 sliding along the first axis 301.

[0120] Among them Fig.15 and Fig.16 , adapters 400 are provided on both sides of the seat 300, and the unlocking mechanism is divided into two groups. The first unlocking members 330 in the two groups are arranged adjacent to each other and are rotatably connected to the backrest 320 respectively. In actual operation, the first unlocking members 330 are moved or pressed by the thumb and index finger. In one embodiment, the seat 300 further includes a two-way lock structure for limiting the movement of the first unlocking member 330. The two-way lock structure includes a fourth unlocking member 450 slidably arranged on the backrest 320. The fourth unlocking member 450 has a blocking portion that abuts against the first unlocking member 330 to limit its rotational unlocking operation. When the fourth unlocking member 450 slides to release the lock, the blocking portion releases the restriction on the first unlocking member 330.

[0121] like Figures 17 to 21 In one embodiment, the seat 300 includes a second locking mechanism disposed between the seat plate 310 and the backrest 320, and used to keep the backrest 320 at different inclination angles relative to the seat plate. The second locking mechanism can be unlocked by a second unlocking member 380 configured separately, or by a first unlocking member 330. The specific seat 300 also includes a second transmission member 360. The second locking mechanism includes a plurality of locking grooves 311 arranged around the first axis 301, and a locking member 321 movably disposed on the backrest 320 and adapted to the locking groove 311. When the backrest 320 is at different angles relative to the seat plate, the locking member 321 can extend into the corresponding locking groove 311. The second unlocking member 380 is movably disposed on the backrest 320 and is linked to the locking member 321. For example, a steel wire is disposed between the two.

[0122] The second transmission member 360 is disposed between the first transmission member 340 and the lock member 321 . When the unlocking mechanism is released, that is, the first unlocking member 330 is operated, the first transmission member 340 rotates and drives the lock member 321 to exit the lock slot 311 through the second transmission member 360 .

[0123] Specific combination of Figure 18 to Figure 22 The first transmission member 340 is a roughly columnar structure with a first slot 342 on the circumference. The second transmission member 360 is slidably installed in the backrest 320 along the radial direction (relative to the first axis 301) and is partially placed in the first slot 342. The first slot 342 is V-shaped. The lock member 321 and the second transmission member 360 slide in the same direction and the two contact each other. The first unlocking member 330 is operated to drive the first transmission member 340 to rotate, and the first transmission member 340 drives the second transmission member 360 to slide and push the lock member 321 out of the lock slot 311. The seat 300 includes a fourth elastic member 328 that acts on the lock member 321 to extend into the lock slot 311 and abuts against the second transmission member 360, and a fifth elastic member 329 that acts on the linkage member 350 to reset it. In combination with the aforementioned split structure of the linkage member 350, the fifth elastic member 329 acts on the second component 353.

[0124] In one embodiment, the frame 1000 includes a trigger 220 movably disposed on the adapter seat 200, and the release mechanism indirectly drives the adapter seat locking member 210 to switch to the release state through the trigger 220. The trigger 220 slides along the rotation axis 201 of the adapter seat 200. Specifically, the adapter seat 200 and the seat 300 are detachably connected, and the adapter seat 200 has a first surface 202 that matches the seat 300. The adapter seat 200 is provided with a groove 203 on the first surface 202, and the trigger 220 is embedded in the groove 203. When the seat 300 and the adapter seat 200 are combined, the trigger 220 is covered, and the release force is provided by the seat 300; when the seat 300 and the adapter seat 200 are separated, the trigger 220 is exposed, and the release force can be provided manually. The trigger 220 is lower than or flush with the first surface 202 in a natural state (not subject to external human force). In one embodiment, the axis of the trigger member 220 coincides with the rotation axis 201 .

[0125] In one embodiment, the adapter seat locking member 210 is a ratchet slidably installed in the support assembly 100 along the rotation axis 201, the adapter seat 200 is provided with a first locking groove 204 matching with the ratchet, the trigger member 220 is against one side of the ratchet along the rotation axis 201, and the support assembly 100 includes a first elastic member acting on the other side of the ratchet so that the ratchet extends into the first locking groove 204 in the locked state.

[0126] The seat 300 has two installation postures facing the front and rear relative to the frame 1000. Correspondingly, the adapter seat 200 has a first rotation direction and a second rotation direction opposite to each other relative to the support assembly 100. The adapter seat 200 has a first driving part 230. When the adapter seat 200 rotates in any direction, the first driving part 230 unlocks the first locking mechanism. The first driving part 230 and the adapter seat 200 are integrally formed or separately fixedly connected.

[0127] The support assembly 100 includes a first element, a second element, and a third element that are hinged to each other. The hinged connection of the three elements can be hinged around the same axis or hinged in pairs. One of the three elements is the front foot 120, another is the rear foot 110, and the remaining is the handle 130. The folded state of the corresponding seat 300 is close to the rear foot 110 or the front foot 120, and the unfolded state of the seat 300 is away from the rear foot 110 or the front foot 120.

[0128] The first locking mechanism includes a first locking member 141 and a second locking member 142. The configurations of the two locking members are as follows:

[0129] Solution a: The first locking member 141 is movably disposed on the first element and has a locking state for acting on the second element and a relative unlocking state; the second locking member 142 is movably disposed on the first element and has a locking state for acting on the third element and a relative unlocking state;

[0130] Or scheme b, the first locking member 141 is movably arranged on the second element, and has a locking state acting on the first element and a relative unlocking state; the second locking member 142 is movably arranged on the third element, and has a locking state acting on the first element and a relative unlocking state.

[0131] For the above two schemes, the two locking members are unlocked independently or in conjunction with each other. "Conjunction unlocking" is understood as when unlocking the first locking mechanism, the first driving part acts on one of the locking members, and unlocks the other locking member through the locking member; conversely, "independent unlocking" is understood as when unlocking the first locking mechanism, the first driving part acts on the two locking members separately.

[0132] In a preferred embodiment, there are two first driving parts 230, each of which has a first inclined surface. For scheme b and when the two locking members are unlocked independently of each other, when the adapter seat rotates along the first rotation direction, one first driving part 230 unlocks the two locking members at the same time; when the adapter seat rotates along the second rotation direction, the other first driving part 230 unlocks the two locking members at the same time; or when the adapter seat rotates in any direction, the two first driving parts 230 respectively unlock the first locking member 141 and the second locking member 142.

[0133] Attached to this application Figure 7 to Figure 9In the display scheme a, the first element is the rear foot 110, the second element is the handle 130, and the third element is the front foot 120. The handle 130, the rear foot 110 and the adapter 200 are rotatably connected around the rotation axis 201, and the front foot 120 is hinged to the rear foot 110. The first locking member 141 and the second locking member 142 are slidably arranged on the rear foot 110, and the two locking members are linked to each other through the second inclined surface. The handle 130 is provided with a second locking groove 131 matched with the first locking member 141, and the front foot 120 is provided with a third locking groove 121 matched with the second locking member 142.

[0134] When the adapter seat 200 rotates around the first rotation direction, Figure 7 and Figure 8 As shown, a first driving part 230 acts on the first locking member 141 to slide and unlock it; when the adapter seat 200 rotates around the second rotation direction, as shown in FIG. Figure 7 and Fig. 9 As shown, another first driving part 230 acts on the first locking member 141 to slide and unlock it. The first locking member 141 drives the second locking member 142 to slide and unlock through the second inclined surface. The first locking member 141 and the second locking member 142 can be unlocked synchronously or the first locking member 141 can be unlocked one step earlier than the second locking member 142.

[0135] In one embodiment, the supporting assembly 100 includes a second elastic member 143 and a third elastic member 144 acting on the first locking member 141 and the second locking member 142 respectively.

[0136] Figure 7 and Fig.10 In the embodiment, the front foot 120 is hinged to the rear foot 110 around the second axis 122, and the second axis 122 and the rotation axis 201 do not coincide. The second axis 122 is lower in height than the rotation axis 201, and the first locking member 141 and the second locking member 142 are located below the horizontal plane where the rotation axis 201 is located. In a preferred embodiment, the inner surface of the rear foot 110 is movably provided with a fifth unlocking member 111 that is linked to one of the first locking member 141 and the second locking member 142. In the figure, the fifth unlocking member 111 and the first locking member 141 are connected by fasteners, and the fifth unlocking member 111 is slidably mounted on the rear foot 110. The fifth unlocking member 111 is located below the horizontal plane where the rotation axis 201 is located, preferably below the adapter seat 200, and further preferably below the seat 300. If the adapter seat 200 is not heavy enough to cause itself to rotate relative to the support assembly 100, the operator can also directly operate the fifth unlocking member to unlock the first locking mechanism.

[0137] Key References Figure 7In one embodiment, a connecting rod 150 is provided between the front leg 120 and the handle 130. When the support assembly 100 is folded or unfolded, the front leg 120 and the handle 130 are linked to each other through the connecting rod 150. When the frame 1000 is in the unfolded state, at least a portion of the connecting rod 150 is located below the front leg 120 and abuts against the front leg 120. Preferably, when the frame 1000 is in the unfolded state, the connecting rod 150 is hidden in the rear leg 110.

[0138] See also Figure 5 , Figure 23 to Figure 30 In one embodiment, the seat plate 310 is fixedly connected with an adapter 400, and the adapter 400 is used to connect with the adapter seat 200. The seat plate 310, the backrest 320 and the adapter 400 are arranged in sequence from inside to outside along the first axis 301.

[0139] The adapter 400 and the adapter seat 200 are detachably connected, and a third locking mechanism is provided between the two to limit the separation of the two. A third unlocking member 430 is movably provided on the adapter 400 to release the third locking mechanism. The third locking mechanism includes:

[0140] The second slot 240 is disposed on the adapter seat 200, specifically, on the first surface 202 of the adapter seat 200;

[0141] The card block 410 is slidably disposed on the adapter 400 and has a locked state of extending into the second card slot 240 and a released state of exiting the second card slot 240;

[0142] The sixth elastic member 420 is disposed in the adapter 400 and acts on the clamping block 410 to make it extend into the second clamping slot 240 .

[0143] The third unlocking member 430 slides radially (relative to the first axis 301) and has an unlocking position and a relative locking position for driving the clamping block 410 to exit the second clamping slot 240, wherein the third unlocking member 430 has an operating portion 431 exposed outside the adapter 400, and the operating portion 431 faces the side of the backrest.

[0144] In one embodiment, a retaining member 440 is slidably disposed in the adapter 400 and is linked to the third unlocking member 430. The retaining member 440 has a first position and a second position. When the third unlocking member 430 is in the unlocking position, the retaining member 440 is in the first position and keeps the third unlocking member 430 in the unlocking position; when the retaining member 440 is in the second position, the third unlocking member 430 can move to the locking position. The existence of the retaining member 440 allows the third unlocking member 430 to be pressed once and then released when disassembling the seat 300, keeping the third locking mechanism in the unlocked state, which is convenient for subsequent disassembly operations.

[0145] The seats also include:

[0146] a seventh elastic member, acting on the third unlocking member 430 to reset the third unlocking member 430 from the unlocking position to the locking position;

[0147] The eighth elastic member 441 acts on the retaining member 440 to switch the retaining member 440 from the second position to the first position.

[0148] In the figure, the retaining member 440 is a columnar structure and slides along the first axis 301. The retaining member 440 is divided into a first section 442 and a second section 443 with different radial dimensions along the sliding direction, and the radial dimension of the second section 443 is larger than that of the first section 442. The third unlocking member 430 is provided with a slide groove 432 along its own sliding direction, and the slide groove 432 is divided into a first area 433 and a second area 434 along the sliding direction. When the third unlocking member 430 is in the locked position, the first section 442 of the retaining member 440 is placed in the first area 433; when the third unlocking member 430 is in the unlocked position, the second section 443 of the retaining member 440 is placed in the second area 434 and cannot enter the first area 433, thereby preventing the third unlocking member 430 from resetting to the locked position.

[0149] Correspondingly, the first surface 202 of the adapter seat 200 is provided with a guide groove 205, and the guide groove 205 cooperates with the retaining member 440. Specifically, when the seat 300 is separated from the frame 1000, the guide groove 205 abuts against and drives the retaining member 440 to switch from the first position to the second position. Subsequently, the third unlocking member 430 can be reset to the locked position, waiting for the seat 300 to be reinstalled next time.

[0150] See also Fig.31 In one embodiment, the seat 300 further includes an armrest 370, which is rotatably connected between the backrest 320 and the adapter 400 around the first axis 301. A third locking member 371 is slidably provided in the seat 300 to act on the armrest 370 to put it in a use state, and the corresponding armrest 370 is provided with a fourth locking groove 372 adapted to the third locking member 371. The backrest 320 is provided with a third driving part 324 that releases the third locking member 371 when rotating and switching to the storage state. In the figure, the third driving part 324 is an inclined surface. When the backrest 320 is folded and stored, the third driving part 324 drives the third locking member 371 to exit the fourth locking groove 372, and the armrest 370 rotates close to the armrest by relying on its own gravity; when unfolded for use, the armrest 370 is independently rotated away from the seat plate 310 until the third locking member 371 extends into the fourth locking groove 372.

[0151] The present application also provides a trolley, comprising a foldable frame 1000 and a seat 300, wherein the foldable frame 1000 refers to the above-mentioned embodiment. The seat 300 includes a seat plate 310, a backrest 320, a release mechanism and a second unlocking member, wherein the seat plate 310 is used to support a child and is combined with the adapter seat 200, and the backrest 320 is connected to the seat plate 310 by rotating around a first axis 301 through a rotating joint. A second locking mechanism is arranged between the backrest 320 and the seat plate 310, and the second locking mechanism is used to keep the backrest at different inclination angles relative to the seat plate, and the second unlocking member is used to unlock the second locking mechanism. The release mechanism is used to apply a release force to the adapter seat locking member 210, and the operator can adjust the inclination angle of the backrest independently through the second unlocking member, or when the whole vehicle is folded, operate the release mechanism to simultaneously unlock the support assembly, the adapter seat and the backrest. The remaining structures refer to the above-mentioned embodiment.

[0152] The present application also provides a foldable frame, including a support assembly 100, a first locking mechanism, an adapter seat, an adapter seat locking member and a trigger member. The support assembly 100 is used to support the vehicle, and may be equipped with wheels for movement at the bottom, and a handle for the user to push. In addition, the support assembly 100 can be relatively unfolded and folded, corresponding to an unfolded state and a folded state.

[0153] The first locking mechanism has a locking state to keep the support assembly 100 unfolded, and a releasing state to allow the support assembly 100 to be folded. The adapter seat 200 is used to connect a vehicle (e.g., a seat). The adapter seat 200 is rotatably connected to the support assembly 100, and the external force driving the adapter seat 200 to rotate can be artificially applied, or provided by the vehicle under gravity, or provided by the adapter seat itself under gravity.

[0154] To ensure that the adapter seat 200 can be controlled to rotate, the adapter seat locking member 210 has a locking state that acts on the adapter seat 200 to limit its rotation relative to the support assembly 100, and correspondingly has a release state that releases the action on the adapter seat 200. The trigger member 220 is movably disposed on the adapter seat 200, and is used to receive a release force and then act on the adapter seat locking member 210 to switch the adapter seat locking member 210 from the locking state to the release state.

[0155] The specific folding operations are as follows:

[0156] When the seat is not installed, the trigger 220 can be manually provided with a release force, and then the adapter seat 200 rotates relative to the support assembly 100 under the action of the adapter seat's own gravity to unlock the first locking mechanism, and finally the support assembly is folded. Alternatively, when the seat is installed, the release force is provided by the unlocking member on the seat or the relative movement of the seat itself (such as the backrest), or the relative movement of the seat relative to the frame, and then the gravity of the seat drives the adapter seat to rotate to unlock the first locking mechanism, and finally the support assembly is folded.

[0157] The support assembly 100, the first locking mechanism, the adapter seat, the adapter seat locking member and the trigger member may refer to the aforementioned embodiments.

[0158] The present application also provides a foldable frame, including a support assembly, a first locking mechanism and an adapter seat. The support assembly 100 is used to support a vehicle, and may be equipped with wheels for movement at the bottom, as well as a handle for the user to push. In addition, the support assembly 100 can be relatively unfolded and folded, correspondingly having an unfolded state and a folded state. The first locking mechanism has a locking state that keeps the support assembly unfolded, and a release state that allows the support assembly to be folded. The adapter seat 200 is used to connect a vehicle, and the vehicle in this embodiment takes a seat as an example. The adapter seat 200 is rotatably connected to the support assembly 100, and when it rotates relative to the support assembly 100, the first locking mechanism is unlocked. The external force that drives the adapter seat 200 to rotate may be artificially applied, or provided by the gravity of the vehicle, or provided by the gravity of the adapter seat itself.

[0159] The present application also provides a foldable frame, including a support assembly and a first locking mechanism, wherein the support assembly 100 is used to support the vehicle, and may be equipped with wheels for movement at the bottom, and a handle for the user to push. In addition, the support assembly 100 can be relatively unfolded and folded, and has an unfolded state and a folded state. The first locking mechanism has a locking state for keeping the support assembly unfolded, and a release state for allowing the support assembly to be folded. The first locking mechanism includes a first locking member 141 and a second locking member 142. The first locking member 141 and the second locking member 142 respectively have a locking state for keeping the support assembly 100 in an unfolded state, and a release state for releasing the restriction on the support assembly 100 and allowing it to rotate. The locking effect is better and the frame is more stable in the unfolded state. The first locking member 141 and the second locking member 142 are linked to release, that is, when the frame is released and folded, it is sufficient to act and drive one of the first locking member 141 and the second locking member 142, which is more convenient to operate. The remaining structures refer to the above-mentioned embodiment.

[0160] The trolley of the present application operates the unlocking mechanism to simultaneously unlock the adapter seat locking member and the first locking mechanism, so that the seat can be rotated and folded synchronously with the adapter seat due to its own gravity, and the seat is folded. The supporting assembly can then be folded, making the folding operation more convenient.

[0161] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0162] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A trolley, characterized in that: include: A foldable frame, comprising a support assembly that can be relatively unfolded and folded, a first locking mechanism for keeping the support assembly unfolded, an adapter seat and an adapter seat locking member, wherein the adapter seat is rotatably connected to the support assembly and unlocks the first locking mechanism when the adapter seat rotates relative to the support assembly, and the adapter seat locking member has a locking state for acting on the adapter seat to limit the rotation of the adapter seat relative to the support assembly and a relative unlocking state; The seat comprises a seat plate combined with the adapter seat, a backrest rotatably connected to the seat plate around a first axis, and a release mechanism, wherein the release mechanism is used to drive the adapter seat locking member to switch to a release state.

2. The trolley according to claim 1, characterized in that: The release mechanism comprises: A first unlocking member, movably disposed on the backrest; A first transmission member, rotatably disposed on the seat plate and / or the backrest around a first axis, and linked to the first unlocking member; The linking member is slidably arranged on the seat plate and / or the backrest along the first axis and is linked with the first transmission member. The linking member has a second driving part that applies a releasing force to the adapter seat locking member.

3. The trolley according to claim 2, characterized in that: The seat also includes: A second locking mechanism, disposed between the backrest and the seat plate, for maintaining the backrest at different inclination angles relative to the seat plate, the second locking mechanism comprising a plurality of locking grooves disposed on the seat plate and arranged around the first axis, and a locking member movably disposed on the backrest and adapted to the locking grooves; The second unlocking member is used to release the second locking mechanism. The second unlocking member is movably arranged on the backrest and linked with the locking member.

4. The trolley according to claim 3, characterized in that: The seat also includes: The second transmission member is arranged between the first transmission member and the locking member, and the first transmission member rotates and drives the locking member to exit the locking groove through the second transmission member.

5. The trolley according to claim 1, characterized in that: The foldable frame comprises a trigger member slidably arranged on the adapter seat along the rotation axis of the adapter seat, and the release mechanism indirectly drives the adapter seat locking member to switch to a release state through the trigger member.

6. The trolley according to claim 5, characterized in that: The adapter seat and the seat are detachably connected, the adapter seat is provided with a groove, the trigger member is embedded in the groove, when the seat is combined with the adapter seat, the trigger member is covered by the seat, when the seat is separated from the adapter seat, the trigger member is exposed.

7. The trolley according to claim 1, characterized in that: The adapter seat has a first rotation direction and a second rotation direction opposite to each other relative to the supporting assembly, and the adapter seat has at least one first driving part. When the adapter seat rotates along any rotation direction, the first driving part unlocks the first locking mechanism.

8. The trolley according to claim 7, characterized in that: The support assembly comprises a first element, a second element and a third element which are hinged to each other, one of which is a front foot, another is a rear foot, and the rest is a handle; The first locking mechanism comprises a first locking member and a second locking member, and the configurations of the two locking members are as follows: The first locking member is movably disposed on the first element and has a locking state acting on the second element, and the second locking member is movably disposed on the first element and has a locking state acting on the third element; Or the first locking member is movably provided on the second element and has a locking state acting on the first element, and the second locking member is movably provided on the third element and has a locking state acting on the first element; The first locking member and the second locking member are unlocked independently or in conjunction with each other.

9. The trolley according to claim 8, characterized in that: The first locking member and the second locking member are slidably disposed on the first element, and the two locking members are linked to each other through a second inclined surface, the second element is provided with a second locking groove matched with the first locking member, and the third element is provided with a third locking groove matched with the second locking member; When the adapter seat rotates, the first driving part acts on the first locking member to slide and unlock it, and the first locking member drives the second locking member to slide and unlock it through the second inclined surface.

10. The trolley according to claim 9, characterized in that: There are two first driving parts, and when the adapter seat is in a locked state, the two first driving parts are located on both sides of the first locking member; When the adapter seat rotates along the first rotation direction, a first driving part acts on the first locking member to unlock the first locking mechanism; When the adapter seat rotates along the second rotation direction, another first driving part acts on the first locking member to unlock the first locking mechanism.

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