Foldable frame and cart

Abstract

The foldable frame comprises a front frame set, a rear frame set, a bottom supporting set, a side wall set, a driving assembly and a locking part, and the front frame set and the rear frame set are distributed in the front-back direction of the cart; the bottom support group is connected with the front frame group and the rear frame group and can be folded; the side wall group is connected with the front frame group and the rear frame group and can be folded; the driving assembly is used for driving the bottom support group to fold; the locking part is used for locking the side wall group in an unfolded state; wherein the locking part is in transmission connection with the driving assembly, and is configured to unlock the locking of the side wall group when the driving assembly drives the bottom support group to fold, so that the bottom support group and the side wall group are folded, and the front frame group and the rear frame group are driven to oppositely move to a folded state. According to the foldable frame provided by the embodiment of the utility model, the folding steps of the foldable frame can be simplified, and the operation is convenient.

Description

Technical Field

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

[0002] There are many types of outdoor strollers on the current market, and most of them have fixed structures of rails and leg tube components. The strollers are foldable, but after folding, although the width of the frame is reduced, the height of the frame will become higher, which is inconvenient to pack and transport. Utility Model Content

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the present invention is to provide a foldable frame that can simplify the folding steps of the foldable frame and facilitate operation.

[0004] Another object of the present invention is to provide a stroller comprising the aforementioned foldable frame.

[0005] The foldable frame according to the embodiment of the present invention is used for a cart, comprising: a front frame group, a rear frame group, a bottom support group, a side panel group, a driving assembly and a locking portion, wherein the front frame group and the rear frame group are distributed along the front-to-back direction of the cart; the bottom support group connects the front frame group and the rear frame group and is foldable; the side panel group connects the front frame group and the rear frame group and is foldable; the driving assembly is used to drive the bottom support group to fold; the locking portion is used to lock the side panel group in an unfolded state; wherein the locking portion is transmission-connected to the driving assembly and is configured to unlock the locking of the side panel group when the driving assembly drives the bottom support group to fold, so that the bottom support group and the side panel group are folded and drive the front frame group and the rear frame group to move toward each other to a folded state.

[0006] According to the foldable frame of the embodiment of the present invention, a drive assembly and a locking part with a transmission connection are set. The drive assembly is used to drive the bottom support group, and the locking part is used to lock and unlock the side panel group. When in use, the side panel group can be unlocked only by driving the drive assembly, thereby realizing the folding of the bottom support group and the side panel group, thereby realizing the folding of the foldable frame.

[0007] In addition, the foldable frame according to the above embodiment of the present invention may also have the following additional technical features:

[0008] In some examples of the present invention, the side panel group is configured as a scissor structure that is foldable in the front-to-back direction.

[0009] In some examples of the present invention, the side panel group includes a first side cross tube and a second side cross tube, the first side cross tube includes a first link and a second link sequentially connected in a front-to-rear direction, the first end of the first link is rotatably connected to the front frame group, the second end of the first link is rotatably connected to the first end of the second link, and the second end of the second link is rotatably connected to the rear frame group; the second side cross tube includes a third link and a fourth link sequentially connected in a front-to-rear direction, the first end of the third link is rotatably connected to the front frame group, the second end of the third link is rotatably connected to the first end of the fourth link, and the second end of the fourth link is slidably connected to the rear frame group.

[0010] In some examples of the present invention, the locking portion is provided on the rear frame assembly, and a slider is provided on the second end of the fourth connecting rod. The slider is slidably provided on the rear frame assembly and can be locked and unlocked by the locking portion.

[0011] In some examples of the present invention, a first fixing block is provided at the second end of the second connecting rod, the first fixing block is fixedly connected to the rear frame assembly, and the sliding block is provided below the first fixing block.

[0012] In some examples of the present invention, the side panel group also includes a fifth connecting rod, one end of the fifth connecting rod is hinged to the first end of the third connecting rod, and the other end is provided with a second fixed block, the second fixed block is fixedly connected to the front frame group, the first end of the first connecting rod is provided with a third fixed block, the third fixed block is fixedly connected to the front frame group, and the second fixed block is provided below the third fixed block.

[0013] In some examples of the present invention, the bottom support group includes a first folding tube and a second folding tube, the first folding tube and the second folding tube extend in the front-to-back direction, the front ends of the first folding tube and the second folding tube are connected to the front frame group, and the rear ends of the first folding tube and the second folding tube are connected to the rear frame group, and the drive assembly is transmission-connected to the first folding tube and / or the second folding tube.

[0014] In some examples of the present invention, the first folding tube includes a first rod and a second rod, one end of the first rod is connected to the front frame group, one end of the second rod is connected to the rear frame group, and the other ends of the first rod and the second rod are hinged; the second folding tube includes a third rod and a fourth rod, one end of the third rod is connected to the front frame group, one end of the fourth rod is connected to the rear frame group, and the other ends of the third rod and the fourth rod are hinged, wherein the drive assembly is connected to the first rod and the third rod; or the drive assembly is connected to the second rod and the fourth rod.

[0015] In some examples of the present invention, the driving assembly includes a first connecting member, a second connecting member and a driving member, the first connecting member is connected to the first folding tube, the second connecting member is connected to the second folding tube, one end of the driving member is hinged to the first connecting member, and the other end is hinged to the second connecting member.

[0016] In some examples of the present invention, the driving member includes a first fixed seat, a second fixed seat and a connecting belt, the two ends of the connecting belt are respectively connected to the first fixed seat and the second fixed seat, the first fixed seat is hinged to the first connecting member, and the second fixed seat is hinged to the second connecting member.

[0017] In some examples of the present invention, the locking portion includes: a locking pin seat, a locking pin, a linkage line and an elastic member, the locking pin seat is provided on the rear frame group, and the locking pin seat has a pin hole; the locking pin is movably provided in the locking pin hole, and when the locking pin extends out of the pin hole, the slider is locked; when the locking pin retracts into the pin hole, the locking pin unlocks the slider; the linkage line is transmission-connected with the locking pin and the drive assembly, and the linkage line is suitable for driving the locking pin to contract to unlock the slider; the elastic member is provided on the locking pin seat and supports the locking pin, and the elastic member is suitable for driving the locking pin to extend to lock the slider.

[0018] In some examples of the present invention, the locking pin seat has a guide groove, the guide groove is connected to the pin hole, the linkage line passes through the guide groove and is transmission-connected to the drive assembly, the interior of the rear frame group is hollow, the guide groove is connected to the interior of the rear frame group, and the linkage line is suitable for extending along the interior of the rear frame group to the bottom support group.

[0019] In some examples of the present invention, the foldable frame further includes a handle assembly connected to the upper end of the front frame assembly and / or the rear frame assembly.

[0020] In some examples of the present invention, the foldable frame further includes a storage basket connected to the upper end of the rear frame assembly.

[0021] In some examples of the present invention, the foldable frame further includes a front wheel set connected to the lower end of the front frame set.

[0022] In some examples of the present invention, the foldable frame further includes a rear wheel set connected to an upper end of the rear frame set.

[0023] In some examples of the present invention, the foldable frame further includes a seat, which is detachably supported on the side panel group in the unfolded state.

[0024] In some examples of the present invention, the foldable frame further includes a dining tray, which is detachably supported on the side panel set in the unfolded state.

[0025] In some examples of the present invention, the foldable frame further includes an umbrella cover assembly, and the umbrella cover assembly is detachably connected to the front frame assembly and the rear frame assembly.

[0026] The cart according to the embodiment of the present invention includes the aforementioned foldable frame.

[0027] The cart according to the embodiment of the present invention can be folded and unfolded according to different usage scenarios, and the folding method of the cart is simple and quick, and the height does not change after folding, which is conducive to improving the compactness of the structure and is convenient for storage or transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of a foldable frame in some embodiments of the present invention (showing an unfolded state);

[0029] Figure 2 is a schematic structural diagram of a foldable frame in some embodiments of the present invention (showing a folded state);

[0030] Figure 3 is a cross-sectional view of a foldable frame in some embodiments of the present invention;

[0031] Figure 4 yes Figure 3 A partial enlarged view of the middle circle A;

[0032] Figure 5 It is an enlarged view of a partial structure of the foldable frame in some embodiments of the present utility model;

[0033] Figure 6 It is an enlarged view of the local structure of the foldable frame in some embodiments of the present invention.

[0034] Reference numerals:

[0035] 100, foldable frame; 10, front frame group; 20, rear frame group; 30, bottom support group; 31, first rod; 32, second rod; 33, third rod; 34, fourth rod; 35, support rod; 40, side panel group; 41, first side cross tube; 41a, first connecting rod; 41b, second connecting rod; 42, second side cross tube; 42a, third connecting rod; 42b, fourth connecting rod; 412, first fixing block; 423, slider; 403, notch; 425, fifth connecting rod; 424, second fixing block Block; 413, third fixed block; 50, drive assembly; 51, first fixed seat; 52, second fixed seat; 53, first connecting member; 54, second connecting member; 55, connecting belt; 60, locking portion; 61, locking pin seat; 601, pin hole; 602, guide groove; 62, locking pin; 63, linkage line; 64, elastic member; 71, push handle group; 72, storage basket; 73, front wheel group; 74, rear wheel group; 75, seat; 76, dining tray; 77, support frame; 78, positioning member; 79, fixing member. DETAILED DESCRIPTION

[0036] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] Combine Figure 1 and Figure 2 According to an embodiment of the present invention, a foldable frame 100 for a stroller includes a front frame group 10, a rear frame group 20, a bottom support group 30, and a side panel group 40. The front frame group 10 and the rear frame group 20 are distributed along the front and rear sides. The bottom support group 30 connects the front frame group 10 and the rear frame group 20 and is foldable. The side panel group 40 connects the front frame group 10 and the rear frame group 20 and is foldable. Thus, the front frame group 10, the rear frame group 20, and the side panel group 40 can jointly construct a frame structure. The bottom support group 30 can provide support for the frame to improve the stability of the frame. Specifically, the side panel group 40 is arranged above the bottom support group 30 to serve as a barrier and support. The bottom support group 30 is arranged at the bottom of the foldable frame 100 to provide support at the bottom, which helps to improve the structural stability of the foldable frame 100. More specifically, the bottom support group 30 and the side panel group 40 are both foldable. When the bottom support group 30 and the side panel group 40 are unfolded, the front frame group 10 and the rear frame group 20 are unfolded in the front-to-back direction. When the bottom support group 30 and the side panel group 40 are folded, the front frame group 10 and the rear frame group 20 are close to each other, which can reduce the size of the foldable frame 100 in the front-to-back direction and the space occupied by the foldable frame 100 after folding, making it easier to store and improving the flexibility of use.

[0038] Further, combined with Figure 3 The foldable frame 100 further includes a drive assembly 50 and a locking portion 60. The drive assembly 50 is configured to drive the bottom support assembly 30 to fold, and the locking portion 60 is configured to lock the side panel assembly 40 in the unfolded state. The locking portion 60 is in transmission connection with the drive assembly 50 and is configured to unlock the side panel assembly 40 when the drive assembly 50 drives the bottom support assembly 30 to fold, thereby folding the bottom support assembly 30 and the side panel assembly 40 and driving the front frame assembly 10 and the rear frame assembly 20 to move toward each other to the folded state. Specifically, the locking portion 60 can lock the side panel assembly 40 when the foldable frame 100 is unfolded, thereby maintaining the side panel assembly 40 in the unfolded state together with the front frame assembly 10 and the rear frame assembly 20, thereby improving the structural stability of the foldable frame 100 when unfolded. When the foldable frame 100 needs to be folded, the bottom support group 30 can be folded and the side panel group 40 can be unlocked at the same time by operating the driving assembly 50, so that the side panel group 40 becomes foldable. As a result, the bottom support group 30 and the side panel group 40 can be folded at the same time, so that the front frame group 10 and the rear frame group 20 can be moved in a direction close to each other, which is conducive to simplifying the folding steps of the foldable frame 100 and facilitating operation.

[0039] According to the foldable frame 100 of the embodiment of the present invention, a drive assembly 50 and a locking portion 60 with a transmission connection are provided, the drive assembly 50 is used to drive the bottom support group 30, and the locking portion 60 is used to lock and unlock the side panel group 40. When in use, the side panel group 40 can be unlocked only by driving the drive assembly 50, thereby realizing the folding of the bottom support group 30 and the side panel group 40, thereby realizing the folding of the foldable frame 100.

[0040] In some embodiments of the present invention, the side panel assembly 40 is configured as a scissor-like structure that can be folded in the front-to-back direction. The scissor-like structure facilitates folding and unfolding and provides strong structural stability. The scissor-like structure is simple, which helps reduce the weight of the foldable frame 100 and simplifies the structure. When folded, the scissor-like structure is highly compact, which helps improve space utilization efficiency.

[0041] Combine Figure 1 and Figure 3In some embodiments of the present invention, the side panel group 40 includes a first side cross tube 41 and a second side cross tube 42, the first side cross tube 41 includes a first link 41a and a second link 41b sequentially connected along the front and rear, the first end of the first link 41a is rotatably connected to the front frame group 10, the second end of the first link 41a is rotatably connected to the first end of the second link 41b, and the second end of the second link 41b is rotatably connected to the rear frame group 20; the second side cross tube 42 includes a third link 42a and a fourth link 42b sequentially connected along the front and rear, the first end of the third link 42a is rotatably connected to the front frame group 10, the second end of the third link 42a is rotatably connected to the first end of the fourth link 42b, and the second end of the fourth link 42b is slidably connected to the rear frame group 20. Thus, the first side cross tube 41 and the second side cross tube 42 can connect the front frame group 10 and the rear frame group 20 in an expandable or foldable manner, wherein one end of the second side cross tube 42 (i.e., the fourth connecting rod 42b) is slidably connected to the rear frame group 20. In this way, when the side panel group 40 is folded, the two ends of the first side cross tube 41 (i.e., the first end of the first connecting rod 41a and the second end of the second connecting rod 41b) can be fixedly connected to the front frame group 10 and the rear frame group 20, and the second side cross tube 42 can slide on the rear frame group 20, so that the scissors structure constructed by the first side cross tube 41 and the second side cross tube 42 can be extended or contracted.

[0042] Optionally, one end of the second side cross tube 42 may be slidably connected to the front frame assembly 10, and the other end may be hingedly connected to the rear frame assembly 20. Alternatively, the second side cross tube 42 may be slidably connected to both the front frame assembly 10 and the rear frame assembly 20. Specifically, when the second side cross tube 42 is slidably connected to the front frame assembly 10 or the rear frame assembly 20, the locking portion 60 is required to lock and unlock the second side cross tube 42. That is, when the frame needs to be folded, the second side cross tube 42 is unlocked to allow it to slide. Therefore, when the second side cross tube 42 is hinged to the front frame assembly 10, the locking portion 60 may be provided only between the second side cross tube 42 and the rear frame assembly 20. Alternatively, when the second side cross tube 42 is hinged to the rear frame assembly 20, the locking portion 60 may be provided only between the second side cross tube 42 and the front frame assembly 10. Alternatively, locking portions 60 may be provided between both ends of the second side cross tube 42 and the front frame assembly 10 and the rear frame assembly 20, so that the front and rear sides of the second side cross tube 42 can slide on the front frame assembly 10 and the rear frame assembly 20.

[0043] For example, in some embodiments of the present invention, Figure 1 and Figure 3The locking portion 60 may be provided on the rear frame assembly 20. A slider 423 may be provided at the second end of the fourth link 42b. The slider 423 may be slidably provided on the rear frame assembly 20 and may be locked and unlocked by the locking portion 60. When the locking portion 60 unlocks the slider 423, the slider 423 may slide downward on the rear frame assembly 20 when the second side cross tube 42 is folded. When the locking portion 60 locks the slider 423, the second side cross tube 42 may be maintained in the deployed state.

[0044] Optionally, the locking portion 60 may also be provided on the front frame group 10, and a slider 423 may be provided at one end of the second side cross tube 42, and the slider 423 may be slidably provided on the front frame group 10; alternatively, the locking portion 60 may be provided on both the front frame group 10 and the rear frame group 20, and a first slider 423 may be provided at one section of the second side cross tube 42, and a second slider 423 may be provided at the other end, and the first slider 423 may be slidably provided on the front frame group 10, and the second slider 423 may be slidably provided on the rear frame group 20.

[0045] Furthermore, in some embodiments of the present invention, Figure 1 The second end of the second connecting rod 41b is provided with a first fixing block 412, which is fixedly connected to the rear frame assembly 20. The slider 423 is provided below the first fixing block 412. When folding, the slider 423 moves downward. In this way, the horizontal height of the folded side panel assembly 40 does not change, which is conducive to improving the compactness of the structure, improving space utilization, and facilitating storage. Figure 1 shows the unfolded state of the foldable frame 100, Figure 2 The folding state of the foldable frame 100 is shown, wherein the distance between the slider 423 and the first fixed block 412 in the folded state is greater than the distance between the slider 423 and the first fixed block 412 in the unfolded state, that is, when the second side cross tube 42 is folded, the slider 423 moves downward and gradually away from the first fixed block 412, thereby achieving folding while keeping the height of the side panel group 40 unchanged in the up and down directions, so as to make full use of the lower space of the side panel group 40.

[0046] More specifically, combined Figure 3In some embodiments of the present invention, the side panel group 40 further includes a fifth link 425, one end of the fifth link 425 is hinged to one end of the second side cross tube 42 (i.e., the first end of the third link 42a), the other end of the fifth link 425 is provided with a second fixing block 424, the second fixing block 424 is fixedly connected to the front frame group 10, and the other end of the first side cross tube 41 (i.e., the first end of the first link 41a) is provided with a third fixing block 413, and the third fixing block 413 is fixedly connected to the front frame group 10. Specifically, a fifth link 425 is hingedly connected between the second fixing block 424 and the second side cross tube 42. Consequently, when the second side cross tube 42 is folded, the front end of the second side cross tube 42 is hingedly connected to the fifth link 425, allowing the second side cross tube 42 to move relative to the fifth link 425. The rear end of the second side cross tube 42 is slidably connected to the rear frame assembly 20, allowing the opposing ends of the second side cross tube 42 to move synchronously. This allows the second side cross tube 42 to fold even without the locking portion 60 provided on the front frame assembly 10, simplifying the structure and improving structural stability. Furthermore, the second fixing block 424 is disposed below the third fixing block 413, allowing the end of the second side cross tube 42 to move downward when folded, thereby improving the compactness of the folded structure. Furthermore, the second fixing block 424 can oppose the slider 423 in the fore-aft or horizontal direction, improving balance.

[0047] According to a specific embodiment of the present invention, one end of the first side cross tube 41 is connected to the front frame assembly 10 via a third fixing block 413, the other end of the first side cross tube 41 is connected to the rear frame assembly 20 via a first fixing block 412, one end of the second side cross tube 42 is hinged to a fifth connecting rod 425, the fifth connecting rod 425 is connected to the front frame assembly 10 via a second fixing block 424, and the other end of the second side cross tube 42 is slidably connected to the rear frame assembly 20 via a slider 423. The first fixing block 412 and the third fixing block 413 are respectively disposed above the slider 423 and the second fixing block 424.

[0048] In some embodiments of the present invention, the bottom support group 30 includes a first folding tube and a second folding tube, the first folding tube and the second folding tube extending in the front-to-back direction, the front ends of the first folding tube and the second folding tube connected to the front frame group, and the rear ends of the first folding tube and the second folding tube connected to the rear frame group, wherein the drive assembly 50 can be transmission-connected to the first folding tube, and the drive assembly 30 can be transmission-connected to the second folding tube, so that the drive assembly 50 can drive the first folding tube and the second folding tube to fold respectively. Alternatively, the drive assembly 50 can be transmission-connected to the first folding tube and the second folding tube at the same time, so that when the drive assembly is working, the first folding tube and the second folding tube can be synchronously driven to fold to achieve rapid folding.

[0049] Specifically, combined Figure 1The first folding tube includes a first rod 31 and a second rod 32. One end of the first rod 31 is connected to the front frame assembly 10, and one end of the second rod 32 is connected to the rear frame assembly 20. The other ends of the first rod 31 and the second rod 32 are hinged. The drive assembly 50 is in transmission connection with one of the first rod 31 and the second rod 32. Specifically, when the first rod 31 and the second rod 32 are unfolded, they can be supported between the front frame assembly 10 and the rear frame assembly 20. When the base support assembly 30 is folded, the drive assembly 50 can drive one of the first rod 31 or the second rod 32 to move, causing the other to rotate relative to the other, thereby achieving the relative movement of the front frame assembly 10 and the rear frame assembly 20. The second folding tube includes a third rod 33 and a fourth rod 34. One end of the third rod 33 is connected to the front frame assembly 10, and one end of the fourth rod 34 is connected to the rear frame assembly 20. The other ends of the third rod 33 and the fourth rod 34 are hinged.

[0050] The driving assembly 50 includes a first connecting member 53, a second connecting member 54 and a driving member. The first connecting member 53 is connected to the first folding tube, and the second connecting member 54 is connected to the second folding tube. One end of the driving member is hinged to the first connecting member 53, and the other end is hinged to the second connecting member 54. Thus, when the driving member is working, it can drive the first folding tube and the second folding tube to fold. More specifically, the first connecting member 53 is connected to the first rod 31, and the second connecting member 54 is connected to the third rod 33; or the first connecting member 53 is connected to the second rod 32, and the second connecting member 54 is connected to the fourth rod 34, which can improve the driving effect and facilitate the folding of the foldable frame 100. Combined Figure 1 By pulling the driving member, the first and third rods 31 and 33 can be directly driven to rotate upward, thereby driving the second and fourth rods 32 and 34 to rotate. The driving member is in transmission connection with the locking portion 60, thereby unlocking the side panel assembly 40. The side panel assembly 40 can then be moved synchronously to fold in response to the driving force of the bottom support assembly 30 during folding. In other words, the foldable frame 100 can control the locking and unlocking of the locking pin 62 by pulling the driving member at the bottom, and the side panel assembly 40 can be unfolded and folded by sliding the slider 423 up and down on the rear frame assembly 20.

[0051] In combination with the above, since the slider 423 is provided below the rear frame assembly 20, the height of the frame after folding will not increase, so that the volume after folding is reduced, which is convenient for packaging and transportation.

[0052] According to the foldable frame 100 of the present invention, the first and second rods 31 and 32 are vertically opposed to the first and second side cross tubes 41 and 42. The side panel assembly 40 further includes a third and fourth side cross tubes, with the third and fourth rods 33 and 34 vertically opposed to the third and fourth side cross tubes. The third side cross tube is horizontally opposed to the first side cross tube 41, and the fourth side cross tube is horizontally opposed to the second side cross tube 42. A slider is also provided at one end of the fourth side cross tube, which is slidably mounted on the rear frame assembly 20. The rear frame assembly 20 is provided with a locking portion 60, and one end of the fourth side cross tube is locked or unlocked by the locking portion 60.

[0053] Optionally, the bottom support group 30 may also include a plurality of support rods 35, which are arranged at intervals and connected between the first folding tube and the second folding tube. In this way, they can not only play a supporting role and improve the structural stability of the bottom support group 30, but also the plurality of support rods 35 can construct a storage space on the bottom support group 30. In the unfolded state, users can place larger objects on the storage rack constructed by the rod body and the support rods to improve the practicality of the frame.

[0054] Further, combined with Figure 3 and Figure 4 The locking portion 60 includes: a locking pin seat 61, a locking pin 62, a linkage line 63 and an elastic member 64. The locking pin seat 61 is provided on the rear frame assembly 20, and the locking pin seat 61 has a guide groove 601; the locking pin 62 is movably provided on the locking pin seat 61, and when the locking pin 62 extends out of the locking pin seat 61, the locking slider 423 is locked; when the locking pin 62 retracts into the locking pin seat 61, the locking pin 62 unlocks the slider 423; the linkage line 63 is transmission-connected with the locking pin 62 and the driving assembly 50, and the linkage line 63 is suitable for driving the locking pin 62 to contract to unlock the slider 423; the elastic member 64 is provided in the locking pin seat 61, the elastic member 64 is supported between the locking pin seat 61 and the locking pin 62, and is suitable for driving the locking pin 62 to extend to lock the slider 423. Specifically, in the locked state, the locking pin 62 limits the position of the slider 423 and the rear frame assembly 20. When the user drives the drive assembly 50, during folding, the linkage line 63 can be pulled, and the linkage line 63 drives the locking pin 62 to retract and separate from the slider 423, so that the slider 423 can slide on the rear frame assembly 20. During unfolding, the driving force disappears. When the slider 423 returns to the predetermined position, the elastic member 64 can drive the locking pin 62 to automatically lock the slider 423. The elastic force of the elastic member 64 can keep the locking pin 62 in the locked state, thereby improving the structural stability.

[0055] In some embodiments of the present invention, Figure 4The locking pin seat 61 also has a guide groove 602, which is connected to the pin hole 601. The linkage line 63 passes through the guide groove 602 and is connected to the locking pin 62 to realize the linkage line 63. The elastic member 64 and the locking pin 62 are arranged in the pin hole 601. When the locking part 60 is locked, the locking pin 62 extends out of the pin hole 601. When the locking part 60 is unlocked, the locking pin 62 retracts into the pin hole 601. Specifically, in combination with Figure 5 The slider 423 has a notch 403. When the notch 403 is opposite to the pin hole 601, the locking pin 62 can automatically extend into the notch 403 of the slider 423 to lock the slider 423. When the locking pin 62 is retracted into the pin hole 601 by the linkage line 63, the locking pin 62 is separated from the slider 423, and the slider 423 can move relative to the rear frame assembly 20.

[0056] Combine Figure 4 In some embodiments of the present invention, the interior of the rear frame assembly 20 is hollow, and the guide groove 602 communicates with the interior of the rear frame assembly 20. The linkage line 63 is adapted to extend along the interior of the rear frame assembly 20 to the bottom support assembly 30 and be in transmission connection with the drive assembly 50. Specifically, the locking portion 60 is disposed within the rear frame assembly 20, the slider 423 is sleeved on the outside of the locking portion 60, and the guide groove 602 communicates with the interior of the rear frame assembly 20, allowing the linkage line 63 to extend along the interior of the rear frame assembly 20 to the bottom support assembly 30, thereby improving the overall aesthetics.

[0057] More specifically, combined Figure 1 and Figure 6 The driving member includes a first fixing seat 51, a second fixing seat 52, and a connecting belt 55. The ends of the connecting belt 55 are connected to the first fixing seat 51 and the second fixing seat 52, respectively. The first fixing seat 51 is hinged to the first connecting member 53, and the second fixing seat 52 is hinged to the second connecting member 54. The ends of the linkage wire 63 extend from the rear frame assembly 20 and can be connected to the first and second fixing seats 51 and 52. The first and second fixing seats 51 and 52 are each provided with a wire portion, into which the linkage wire 63 is adapted to extend for easy storage and improved aesthetics. Thus, when the connecting belt 55 is pulled, the linkage wires 63 on the left and right sides can be simultaneously pulled to simultaneously unlock the locking portions 60 on the left and right sides of the side panel assembly 40.

[0058] Optionally, the linkage line 63 can be a steel line, a steel cable, an iron wire, etc. to improve the structural strength and durability.

[0059] Combine Figure 1In some embodiments of the present invention, the foldable frame 100 further includes a push handle assembly 71, which is connected to the upper ends of the front frame assembly 10 and / or the rear frame assembly 20 to facilitate the user to push or pull the foldable frame 100. Specifically, the push handle assembly 71 can be connected to the front frame assembly 10 to facilitate pulling the foldable frame 100. The push handle assembly 71 can also be connected to the rear frame assembly 20 to facilitate the user to push the foldable frame 100. Alternatively, the push handle assembly 71 can be connected to each of the front frame assembly 10 and the rear frame assembly 20, thereby allowing the user to select a push handle for operation according to the usage situation, thereby improving the flexibility of use.

[0060] The handle assembly 71 can be configured to extend in the vertical direction, the front-back direction, or the rotatable connection to the front frame assembly 10. Furthermore, the handle assembly 71 can be rotatably connected to the front frame assembly 10 or the rear frame assembly 20 to facilitate user adjustment of the angle of the handle assembly 71 or folding and unfolding the handle assembly 71, thereby increasing user flexibility.

[0061] In practical application, combined with Figure 1 and Figure 2 , lift the connecting belt 55 upwards, driving the fixed seat to rotate, thereby pulling the linkage line 63 to drive the other end of the locking pin 62 to retract into the locking pin seat 61. At this time, the slider 423 can slide downward along the rear frame group 20, and the slider 423 drives the side panel group 40 to fold. At the same time, the bottom support group 30 drives the front frame group 10 and the rear frame group 20 to move closer and fold. Then press the bending button of the push handle group 71. At this time, the push handle upper tube rotates downward and folds, thereby achieving the effect of folding the entire vehicle. Conversely, when unfolding, press the bottom support group 30 downwards to flatten the bottom support group 30, pushing the front frame group 10 and the rear frame group 20 apart, and the side panel group 40 drives the slider 423 to slide upward along the rear frame group 20, sliding to the locking pin 62. The locking pin 62 springs into the notch 403 of the slider 423 and locks (see Figure 5 ).

[0062] In some embodiments of the present invention, Figure 1 The foldable frame 100 also includes a storage basket 72, which is connected to the upper end of the rear frame group 20. Specifically, the storage basket 72 can be used to support objects, thereby increasing the storage space of the foldable frame 100 and improving the space utilization of the foldable frame 100.

[0063] In some embodiments of the present invention, the foldable frame 100 further includes a front wheel assembly 73 connected to the lower end of the front frame assembly 10. The foldable frame 100 further includes a rear wheel assembly 74 connected to the upper end of the rear frame assembly 20. The front and rear wheel assemblies 73 and 74 facilitate movement of the foldable frame 100. The front and rear wheel assemblies 73 and 74 can be rollers of the same size or of different sizes. Furthermore, the front wheel assemblies 73 can include two wheels, one on each side. When the foldable frame 100 is folded, a portion of the rear wheel assembly 74 is positioned between the two wheels to improve structural compactness. Alternatively, the rear wheel assemblies 74 can include two wheels, one on each side. When the foldable frame 100 is folded, a portion of the front wheel assembly 73 is positioned between the two wheels. Alternatively, the front wheel assembly 73 can include two wheels, one on each side.

[0064] In some embodiments of the present invention, Figure 3 The foldable frame 100 further includes a seat 75, which is detachably supported on the side panel assembly 40 in the unfolded state. The side panel assembly 40 may include two seats distributed along the left and right sides. Fixing members 79 may be provided at the left and right ends of the seat 75, respectively positioned on the two side panel assemblies 40. Seats 75 may be provided at the front and rear of the foldable frame 100, with the two seats 75 arranged opposite each other. Alternatively, multiple seats 75 may be arranged along the front and rear sides of the foldable frame 100.

[0065] In some embodiments of the present invention, the foldable frame 100 further includes a dining tray 76, which is detachably supported on the side panel assembly 40 in the unfolded state. Furthermore, the aforementioned seat 75 and the dining tray 76 can be positioned opposite each other, allowing the seat 75 and the dining tray 76 to be paired together to expand the functionality of the foldable frame 100. In the aforementioned embodiment, the seats 75 can include two seats 75 positioned opposite each other, and the dining tray 76 can be positioned between the two seats 75.

[0066] In some embodiments of the present invention, the foldable frame 100 further includes an umbrella cover assembly (not shown in the figure), which is detachably connected to the front frame assembly 10 and the rear frame assembly 20. The umbrella cover assembly can be used for sun protection to optimize the use environment of the foldable frame 100, wherein the umbrella cover assembly can be configured to be folded and unfolded integrally with the front frame assembly 10 and the rear frame assembly 20. Alternatively, the umbrella cover assembly can be configured to be detachable. Figure 1 A support frame 77 can be connected to the top of the front frame group 10 and the rear frame group 20 respectively. The support frame 77 extends upward, and the umbrella cover group can be installed on the support frame 77.

[0067] The foldable frame 100 also includes a positioning member 78, which can be provided on the front frame group 10 or the rear frame group 20. When the frame is in a folded state, the positioning member 78 can play a limiting role to prevent the folded frame from unfolding, thereby improving the stability of the folded state.

[0068] According to the embodiment of the present invention, the cart includes the aforementioned foldable frame 100. By applying the aforementioned foldable frame 100 to the cart, the cart can be folded and unfolded according to different usage scenarios. The folding method of the cart is simple and quick, which reduces the difficulty of use and brings convenience to users.

[0069] In addition, the foldable frame 100 of the present invention can also be used in equipment such as baby cribs.

[0070] In the description of the present invention, it should be understood that the terms "length", "up", "down", "front", "back", "left", "right", "horizontal", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0072] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0073] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0075] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A foldable frame (100) for a cart, characterized in that: include: A front frame group (10) and a rear frame group (20), wherein the front frame group (10) and the rear frame group (20) are distributed along the front-to-back direction of the cart; A bottom support group (30), the bottom support group (30) connects the front frame group (10) and the rear frame group (20) and is foldable; A side panel group (40), the side panel group (40) is connected to the front frame group (10) and the rear frame group (20) and is foldable; A driving assembly (50), the driving assembly (50) is used to drive the bottom support assembly (30) to fold; A locking portion (60), the locking portion (60) being used to lock the side panel group (40) in an unfolded state; The locking portion (60) is in transmission connection with the driving assembly (50) and is configured to unlock the locking of the side panel group (40) when the driving assembly (50) drives the bottom support group (30) to fold, so that the bottom support group (30) and the side panel group (40) are folded and drive the front frame group (10) and the rear frame group (20) to move toward each other to a folded state.

2. The foldable frame (100) according to claim 1, characterized in that The side panel group (40) is configured as a scissor structure that is foldable in the front-rear direction.

3. The foldable frame (100) according to claim 2, characterized in that The side panel group (40) includes a first side cross tube (41) and a second side cross tube (42), the first side cross tube (41) includes a first link (41a) and a second link (41b) connected in sequence along the front and rear, the first end of the first link (41a) is rotatably connected to the front frame group (10), the second end of the first link (41a) is rotatably connected to the first end of the second link (41b), and the second end of the second link (41b) is rotatably connected to the rear frame group (20); the second side cross tube (42) includes a third link (42a) and a fourth link (42b) connected in sequence along the front and rear, the first end of the third link (42a) is rotatably connected to the front frame group (10), the second end of the third link (42a) is rotatably connected to the first end of the fourth link (42b), and the second end of the fourth link (42b) is slidably connected to the rear frame group (20).

4. The foldable frame (100) according to claim 3, characterized in that The locking portion (60) is provided on the rear frame assembly (20), and a slider (423) is provided on the second end of the fourth connecting rod (42b). The slider (423) is slidably provided on the rear frame assembly (20) and can be locked and unlocked by the locking portion (60).

5. The foldable frame (100) according to claim 4, characterized in that A first fixing block (412) is provided at the second end of the second connecting rod (41b), the first fixing block (412) is fixedly connected to the rear frame assembly (20), and the sliding block (423) is provided below the first fixing block (412).

6. The foldable frame (100) according to claim 4, characterized in that The side panel group (40) further includes a fifth connecting rod (425), one end of the fifth connecting rod (425) is hinged to the first end of the third connecting rod (42a), and the other end is provided with a second fixing block (424), the second fixing block (424) is fixedly connected to the front frame group (10), the first end of the first connecting rod (41a) is provided with a third fixing block (413), the third fixing block (413) is fixedly connected to the front frame group (10), and the second fixing block (424) is provided below the third fixing block (413).

7. The foldable frame (100) according to claim 1, characterized in that The bottom support group (30) includes a first folding tube and a second folding tube, the first folding tube and the second folding tube extend in the front-to-back direction, the front ends of the first folding tube and the second folding tube are connected to the front frame group, and the rear ends of the first folding tube and the second folding tube are connected to the rear frame group, and the driving component (50) drives the first folding tube and / or the second folding tube to fold.

8. The foldable frame (100) according to claim 7, characterized in that The first folding tube comprises a first rod (31) and a second rod (32), one end of the first rod (31) is connected to the front frame group (10), one end of the second rod (32) is connected to the rear frame group (20), and the other ends of the first rod (31) and the second rod (32) are hinged; The second folding tube includes a third rod (33) and a fourth rod (34), one end of the third rod (33) is connected to the front frame group (10), one end of the fourth rod (34) is connected to the rear frame group (20), and the other ends of the third rod (33) and the fourth rod (34) are hinged, wherein the driving assembly (50) is connected to the first rod and the third rod; or the driving assembly (50) is connected to the second rod and the fourth rod.

9. The foldable frame (100) according to claim 7, characterized in that The driving assembly (50) comprises a first connecting member (53), a second connecting member (54) and a driving member, wherein the first connecting member (53) is connected to the first folding tube, the second connecting member (54) is connected to the second folding tube, and one end of the driving member is hinged to the first connecting member (53), and the other end is hinged to the second connecting member (54).

10. The foldable frame (100) according to claim 9, characterized in that The driving member comprises a first fixing seat (51), a second fixing seat (52) and a connecting belt (55), wherein two ends of the connecting belt (55) are respectively connected to the first fixing seat (51) and the second fixing seat (52), the first fixing seat (51) is hinged to the first connecting member (53), and the second fixing seat (52) is hinged to the second connecting member (54).

11. The foldable frame (100) according to claim 4, characterized in that The locking portion (60) includes: A locking pin seat (61), the locking pin seat (61) being provided on the rear frame assembly (20), the locking pin seat having a pin hole (601); a locking pin (62), the locking pin (62) being movably disposed in the pin hole (601); when the locking pin (62) extends out of the pin hole (601), the slider (423) is locked; and when the locking pin (62) retracts into the pin hole (601), the locking pin (62) unlocks the slider (423); a linkage line (63), the linkage line (63) being in driving connection with the locking pin (62) and the driving assembly (50), the linkage line (63) being adapted to drive the locking pin (62) to contract so as to unlock the slider (423); An elastic member (64) is provided on the locking pin seat (61) and supports the locking pin (62). The elastic member (64) is suitable for driving the locking pin (62) to extend to lock the slider (423).

12. The foldable frame (100) according to claim 11, characterized in that The locking pin seat has a guide groove (602), the guide groove (602) is communicated with the pin hole (601), the linkage line (63) passes through the guide groove (602) and is transmission-connected with the driving assembly (50), the interior of the rear frame group (20) is hollow, the guide groove (602) is communicated with the interior of the rear frame group (20), and the linkage line (63) is suitable for extending along the interior of the rear frame group (20) to the bottom support group (30).

13. The foldable frame (100) according to claim 1, characterized in that The foldable frame (100) further comprises a handle group (71), wherein the handle group (71) is connected to the upper end of the front frame group (10) and / or the rear frame group (20); and / or, the foldable frame (100) further comprises a storage basket (72), wherein the storage basket (72) is connected to the upper end of the rear frame group (20); and / or, the foldable frame (100) further comprises a front wheel group (73), wherein the front wheel group (73) is connected to the lower end of the front frame group (10); and / or, the foldable frame (100) further comprises a rear wheel group (74), wherein The rear wheel group (74) is connected to the upper end of the rear frame group (20); and / or, the foldable frame (100) further includes a seat (75), and in the unfolded state, the seat (75) is detachably supported on the side panel group (40); and / or, the foldable frame (100) further includes a dining tray (76), and in the unfolded state, the dining tray (76) is detachably supported on the side panel group (40); and / or, the foldable frame (100) further includes an umbrella cover group, and the umbrella cover group is detachably connected to the front frame group (10) and the rear frame group (20).

14. A cart, characterized in that: The foldable frame (100) comprises the foldable frame (100) according to any one of claims 1 to 13.

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