Foldable frame
Patent Information
- Application Number
- PCT/SG2026/050148
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2026-03-10
- Filing Date
- 2026-03-13
- Publication Date
- 2026-09-17
Smart Images
Figure SG2026050148_17092026_PF_FP_ABST
Abstract
Description
[0001] Collapsible frame
[0002] Technical Field
[0003] This application relates to the field of wheeled mobility device technology, and in particular to a retractable vehicle frame.
[0004] Background Technology
[0005] Vehicles for carrying children, pets, or other items already exist. The vehicle's frame can have a foldable design. When not in use, the vehicle can be folded down to reduce its size, making it easier to store or carry. However, the frame structure in these technologies can be complex, resulting in larger space requirements, more complicated use, or greater weight and difficulty in transport. Therefore, there is a need for improved frame structures.
[0006] Summary of the Invention
[0007] Therefore, it is necessary to provide a retractable frame that can achieve the unfolding and folding of the frame with a relatively simple structure to address at least one of the above problems.
[0008] The first aspect of this application provides a retractable frame that can switch between an extended state and a retracted state, comprising: a first support leg and a second support leg pivotally connected to each other; a rider, the upper end of which is pivotally connected to the first support leg and / or the second support leg; a first frame, the first frame being pivotally connected to the first support leg; and a retraction mechanism, the retraction mechanism being connected to the rider, the first support leg, the second support leg, and the first frame respectively; wherein, when the retractable frame is in the extended state, the rotation of the rider relative to the first support leg drives the retraction mechanism to move, and the retraction mechanism drives the first support leg and the first frame to rotate, thereby causing the rider, the first support leg, the second support leg, and the first frame to retract to each other, so that the retractable frame switches from the extended state to the retracted state.
[0009] In one embodiment, the retraction mechanism includes: a first connector connected to a rider; a second connector connected to a second support leg and pivotally connected to the first connector; and a third connector connected to the first support leg and pivotally connected to the third connector.
[0010] In one embodiment, the first support leg, the second support leg, and the rider are pivotally connected to each other about a first pivot axis. In another embodiment, the first connector and the rider are pivotally connected to each other about a second pivot axis.
[0011] In one embodiment, the first, second, and third connectors are pivotally connected to each other about a third pivot axis. In another embodiment, the second connector and the second support leg are pivotally connected to each other about a fourth pivot axis.
[0012] In one embodiment, the third connector and the first support leg are pivotally connected to each other about a fifth pivot axis.
[0013] In one embodiment, the third connector is connected to the first frame at the first connection point.
[0014] In one embodiment, the first frame and the first support leg are pivotally connected to each other about a fifth pivot axis.
[0015] In one embodiment, the collapsible frame further includes a first frame, a second frame located below the first frame, and the second frame is mounted on a second support foot and / or the first support foot.
[0016] In one embodiment, the closing mechanism further includes a fourth connector, the fourth connector and the second connector are pivotally connected to each other about a sixth pivot axis, and the fourth connector and the second frame are pivotally connected to each other about a seventh pivot axis.
[0017] In one embodiment, the retractable frame further includes a support plate resting on the first frame.
[0018] In one embodiment, the second frame is rotatably mounted on a reinforcing bar in the second support leg.
[0019] In one embodiment, the rider includes a first section and a second section; the first support leg, the second support leg, and the second section are pivotally connected to each other via a first pivot joint; the first pivot joint is switchable between an unlocked state that allows rotation between the first support leg, the second support leg, and the second section, and a locked state that prohibits rotation between the first support leg, the second support leg, and the second section; the first section and the second section are pivotally connected to each other via a second pivot joint such that the first section can pivot relative to the second section between an extended position and a retracted position; the first pivot joint is switchable between an unlocked state that allows rotation between the first section and the second section, and a locked state that prohibits rotation between the first section and the second section.
[0020] In one embodiment, a first release mechanism is provided on the driver's side; wherein, when the first release mechanism is operated, a second pivot joint is released to allow the first section to be switched from an extended position to a retracted position; wherein, when the first section is switched from an extended position to a retracted position, a second pivot joint is released to allow the first support leg, the second support leg, and the second section to retract relative to each other.
[0021] In one embodiment, the first frame includes a first frame and a second frame, the first frame being pivotally connected to the second frame such that the first frame can pivot relative to the second frame between a closed position and an open position.
[0022] In one embodiment, the second frame is pivotally connected to the first support leg.
[0023] In one embodiment, a first frame is pivotally connected to a second frame via a third pivot joint, the third pivot joint including a second release member. The third pivot joint is configured such that: when the first frame is in the open position, the first frame can be switched from the open position to the closed position without operating the second release member; when the first frame is in the closed position, the first frame cannot be switched from the closed position to the open position without operating the second release member, and when the second release member is operated, the first frame can be switched from the closed position to the open position.
[0024] In one embodiment, the collapsible frame further includes a canopy bracket mounted on the first frame.
[0025] In one embodiment, the collapsible frame also includes a storage rack mounted on the handlebars.
[0026] In one embodiment, the first support leg is the front support leg, and the second support leg is the rear support leg.
[0027] In one embodiment, the first frame is a generally rectangular enclosure, and the second frame is a base frame.
[0028] A second aspect of this application provides a collapsible frame capable of switching between an extended and a collapsed state. The collapsible frame includes: a first support leg and a second support leg pivotally connected to each other; a handlebar, the lower end of which is pivotally connected to the first support leg and / or the first support leg; a first frame pivotally connected to the handlebar and the first support leg; and a collapsing mechanism connected to the handlebar, the first support leg, the second support leg, and the first frame, respectively. When the collapsible frame is in the extended state, rotation of the handlebar relative to the second support leg drives the collapsing mechanism to move. The movement of the collapsing mechanism causes the first frame and the first support leg to rotate, causing the handlebar, the first support leg, the second support leg, and the first frame to retract into each other, thereby switching the collapsible frame from the extended state to the collapsed state.
[0029] In one embodiment of this application, the folding mechanism includes a fifth connector and a sixth connector. The first frame is fixed to the fifth connector, the fifth connector is pivotally connected to the rider, the first end of the sixth connector is pivotally connected to the first frame, and the second end of the sixth connector is pivotally connected to the first support leg.
[0030] In one embodiment of this application, the retraction mechanism further includes a first connector, a second connector, and a third connector. A first end of the first connector is pivotally connected to the rider, and a second end of the first connector is pivotally connected to the second connector and the third connector. The second connector is pivotally connected to the first support leg and has a first end pivotally connected to the first connector. The first end of the second connector is pivotally connected to the first support leg, and the second end of the second connector is pivotally connected to the first connector.
[0031] In one embodiment of this invention, the first end of the third connector is pivotally connected to the sixth connector about the same pivot axis to the first support leg. The second end of the third connector is pivotally connected to the second connector about the same pivot axis to the first connector.
[0032] In one embodiment of this application, the collapsible frame further includes a second frame located below the first frame and rotatably connected to the second support leg.
[0033] In an embodiment of this application, the folding structure further includes a fourth connector, the first end of which is pivotally connected to the second end of the second connector, and the second end of which is pivotally connected to the second frame.
[0034] In one embodiment of this application, the second connector is L-shaped, with its middle portion pivotally connected to the second support leg, and both ends of the second connector extending from the middle portion pivotally connected to the first connector and the fourth connector, respectively.
[0035] In an embodiment of this application, the collapsible frame further includes a support plate, which is disposed on the first frame.
[0036] In one embodiment of this application, the foldable frame further includes a movable plate, which is slidable relative to the support plate between a stowed position and a used position. When the movable plate is in the stowed position, the entire movable plate is located above or below the support plate. When the movable plate is in the used position, one end of the movable plate is located at the top or bottom of the support plate, and the other end of the movable plate extends out from the support plate.
[0037] In one embodiment of this application, the support plate is provided with a guide rail, and the movable plate is provided with a connecting part that slides with the guide rail.
[0038] In one embodiment of this application, the first frame includes a first frame, a second frame, and a third frame. The second frame is pivotally connected to the rider. The first frame is pivotally connected to the second frame such that the first frame can pivot relative to the second frame between a closed position and an open position. The third frame is pivotally connected to the second frame such that the third frame can pivot relative to the second frame between a closed position and an open position.
[0039] Attached Figure Description
[0040] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.
[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0042] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown only as examples in the drawings and are not necessarily drawn to actual scale. In the accompanying drawings:
[0043] Figure 1 is a perspective view of the collapsible frame according to the first embodiment of this application in its unfolded state; Figure 2 is another perspective view of the collapsible frame shown in Figure 1, wherein the support plate and the roof bracket are omitted; Figures 3A and 3B are enlarged views of point A in Figure 2;
[0044] Figure 4 is another perspective view of the collapsible frame shown in Figure 2;
[0045] Figure 5 is a perspective view of the collapsible frame shown in Figure 2 in its state between the extended and retracted states;
[0046] Figures 6A and 6B are enlarged views of point B in Figure 5;
[0047] Figure 7 is a side view of the collapsible frame shown in Figure 1;
[0048] Figure 8 is a side view of the collapsible frame shown in Figure 1 in a state between its extended and collapsed state.
[0049] Figure 9 is a side view of the collapsible frame shown in Figure 1 in another state between its extended and collapsed states.
[0050] Figure 10 is a side view of the collapsible frame shown in Figure 1 when it is in the collapsed state;
[0051] Figures 11 to 13 are perspective views of the retractable platform frame shown in Figure 1, wherein the canopy support and the first frame are pivoted to different positions;
[0052] Figures 14 to 16 are perspective views of the vehicle formed after a pet basket is installed on the collapsible frame shown in Figure 1, wherein the canopy support and the first frame are pivoted to different positions;
[0053] Figure 17 is a perspective view of the first frame of the collapsible frame shown in Figure 1, wherein the third pivot joint is disassembled; Figure 18A is a cross-sectional view of the third pivot joint of the collapsible frame shown in Figure 1, wherein the second release element is not pressed.
[0054] Figure 18B is a cross-sectional view of the third pivot joint of the collapsible frame shown in Figure 1, wherein the second release element is pressed; Figure 19 is a perspective view of the locking element in the third pivot joint of the collapsible frame shown in Figure 1.
[0055] Figure 20 is a perspective view of the first fixing seat in the third pivot joint of the collapsible frame shown in Figure 1; Figure 21 is a perspective view of the collapsible frame according to the second embodiment of the present application, wherein the collapsible frame is in the unfolded state.
[0056] Figure 22 is an enlarged view of region C in Figure 21;
[0057] Figure 23 shows the pivot axes of the components of the closing mechanism in Figure 22;
[0058] Figure 24 is a perspective view of the collapsible frame shown in Figure 21 from another angle.
[0059] Figure 25 is an enlarged view of region D in Figure 24;
[0060] Figure 26 shows the pivot axes of the components of the closing mechanism in Figure 25;
[0061] Figure 27 is a perspective view of the collapsible frame shown in Figure 21 in its state between the extended and collapsed states, with the support plate omitted.
[0062] Figure 28 is an enlarged view of region E in Figure 27;
[0063] Figure 29 shows the pivot axes of the components of the closing mechanism in Figure 28;
[0064] Figure 30 is a side view of the collapsible frame shown in Figure 21, and schematically shows the relative positions of the components of the collapsible mechanism;
[0065] Figure 31 is a side view of the collapsible frame shown in Figure 21 in its extended and collapsed states, and schematically shows the relative positions of the components of the collapsible mechanism.
[0066] Figure 32 is a side view of the collapsible frame shown in Figure 21 in its collapsed state, and schematically shows the relative positions of the components of the collapsible mechanism.
[0067] Figure 33 is a perspective view of the retractable frame shown in Figure 21 from another angle, where the third frame is in the open position;
[0068] Figure 34 is a perspective view of the collapsible frame shown in Figure 23 with the movable plate in the use position;
[0069] Figure 35 is a perspective view of a collapsible frame according to another embodiment of this application with the movable plate in the use position. (Explanation of reference numerals)
[0070] 1. Collapsible frame;
[0071] 111. First support leg; 1111. Front wheel seat; 112. Second support foot; 1121. Rear wheel seat; 1122. Reinforcing bar; 12. Handrail; 121. First section; 1211. Handrail; 1212. First release mechanism; 122. First section; 123. Second pivot joint; 124. First pivot joint;
[0072] 13. First frame; 131. First frame body; 132. Second frame body; 133. Third pivot joint; 1331. Second unlocking element; 1332. First fixing seat; 13321. First protrusion; 13321a. Vertical surface; 13321b. Inclined surface; 1333. Second fixing seat; 1334. Locking element; 13341. First recess; 13341a. Vertical surface; 13341b. Inclined surface; 13342. First recess; 13342a. Vertical surface; 13342b. Inclined surface; 13343. First protrusion; 1335. Elastic element;
[0073] 14. Closing mechanism; 141. First connecting piece; 142. Second connecting piece; 143. Third connecting piece; 144. Fourth connecting piece;
[0074] 15. Second frame; 151. Rotating connector; 1511. Sleeve part; 1512. Clamping part;
[0075] 16. Support plate;
[0076] 17. Canopy support frame;
[0077] 18. Shelves;
[0078] 20. Front wheel;
[0079] 21. Rear wheel;
[0080] 30. Load-bearing component; 31. Box body; 32. Roof;
[0081] 1000, Vehicles;
[0082] XI, First pivot axis; X2, Second pivot axis; X3, Pivot axis; X4, Fourth pivot axis; X5, Fifth pivot axis; X6, Sixth pivot axis; X7, Seventh pivot axis; X8, Eighth pivot axis; C1, Connection point.
[0083] A100, collapsible frame;
[0084] A110, Driver; A111, First Section; A1111, Handrail; A1112, First Release Device; A112, Second Section; A113, Second Pivot Joint;
[0085] A121, First support leg; A1211, Front wheel seat; A122, Second support leg; A1221, Rear wheel seat; A1222, Reinforcing bar; A123, Pivot joint;
[0086] A130, First frame; A131, First frame body; A132, Second frame body; A133, Third frame body; A134, [4th pivot joint]; A135, Fourth pivot joint;
[0087] A140, Closing mechanism; A141, First connecting member; A142, Second connecting member; A143, Third connecting member; A144, Fourth connecting member; A145, Fifth connecting member; A146, Sixth connecting member;
[0088] A150, Second frame; A151, Rotating connector;
[0089] A160, Support plate; A161, Guide rail; A170, Canopy bracket; A171, Canopy base;
[0090] A180, Movable plate; A181, Connecting part;
[0091] A191, front wheel; A192, rear wheel;
[0092] AX1, First pivot axis; AX2, Second pivot axis; AX3, Third pivot axis; AX4, Fourth pivot axis; AX5, Fifth pivot axis; AX6, Sixth pivot axis; AX7, Seventh pivot axis; AX8, Eighth pivot axis; AX9, Ninth pivot axis; AX10, Tenth pivot axis.
[0093] concrete reality
[0094] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed herein.
[0095] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "installation," "one end," "the other end," and similar expressions used in this article are for illustrative purposes only.
[0096] It should be noted that when a feature or element is referred to herein as "on another feature or element," it may be directly on the other feature or element, or there may be intermediate features and / or elements present. Conversely, when a feature or element is referred to as "directly" on another feature or element, there are no intermediate features or elements. It should also be understood that when a feature or element is referred to as "connected," "attached," or "joined" to another feature or element, it may be directly connected, attached, or joined to the other feature or element, or there may be intermediate features or elements present. Conversely, when a feature or element is referred to as "directly connected," "directly attached," or "directly joined" to another feature or element, there are no intermediate features or elements.
[0097] While the terms "first" and "second" may be used herein to describe various features or elements, these features or elements should not be limited by these terms unless otherwise specified. These terms are used to distinguish one feature or element from another. Thus, the first feature or element discussed below may be referred to as the second feature or element, and similarly, the first feature or element discussed below may be referred to as the ______ feature or element. In this document, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.
[0098] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0099] Referring to Figures 1 to 4, the first embodiment of this invention provides a foldable frame 1, which can be used as a vehicle frame. Depending on the usage scenario, the vehicle can be any suitable type of vehicle, such as a stroller, pet stroller, or cargo cart.
[0100] For ease of description, this application uses the following terms to indicate relative orientation: "front," "rear," "left," "right," "up," and "down." These terms should be understood as follows: When the collapsible frame 1 is placed on a working surface (e.g., the ground) and the user pushes the collapsible frame 1, the direction facing the front of the user's body is "front," and the direction facing the back of the user's body is "rear," with "front" and "rear" being opposite each other; the directions facing the left and right sides of the user's body are "left" and "right," respectively, with "left" and "right" being opposite each other; "up" and "down" are defined by their distance from the working surface, with a greater distance from the working surface being "up," and vice versa.
[0101] Referring again to Figures 1 through 4, in one embodiment of this application, the collapsible frame 1 may have a generally symmetrical structure. Specifically, the collapsible frame 1 may have a left frame side and a right frame side, which are laterally spaced apart from each other across the width of the collapsible frame 1. In the embodiments of this application, the left frame side and the right frame side are generally mirror images of each other. While this application sometimes describes only one of the left frame side and the right frame side in detail, various components of one of the left frame side and the right frame side may be described in the singular. However, it should be understood that in the embodiments described herein, when components of one of the left frame side and the right frame side are described in the singular, the other of the left frame side and the right frame side may contain the same mirror images of each other.
[0102] The retractable frame 1 has an extended state and a retracted state, and can switch between these two states. Referring to Figures 1 to 4, 7, and 11 to 13, when the retractable frame 1 is in the extended state, at least some or all of the components of the retractable frame 1 can be in their respective extended positions and are generally extended relative to each other for use; referring to Figure 10, when the retractable frame 1 is in the retracted state, at least some or all of the components of the retractable frame 1 can be in their respective retracted positions and are generally retracted relative to each other.
[0103] Referring to Figures 1 to 4, the collapsible frame 1 may include a first support leg 111, a second support leg 112, a rider 12, a first frame 13, and a collapsible mechanism 14.
[0104] Referring to Figures 1 to 4, the first support leg 111 and the first support leg 112 are pivotally connected to each other. For example, one end of the first support leg 112 may be pivotally connected to the first support leg 111. For example, the top end of the second support leg 112 may be pivotally connected to one end of the first support leg 111 adjacent to the handlebar 12, i.e., the top end of the first support leg 111. The lower end of the handlebar 12 may be pivotally connected to the first support leg 111 and / or the second support leg 112. For example, the lower end of the handlebar 12 may be pivotally connected to the top end of the first support leg 111 and / or the top end of the second support leg 112. In one embodiment of this application, the top end of the first support leg 111, the top end of the second support leg 112, and the bottom end of the handlebar 12 may be pivotally connected to each other, for example, via a first pivot joint 124, thereby pivoting each other around the same pivot axis, i.e., the first pivot axis XI shown in Figure 3B. In some other embodiments, the rider 12 and the first support foot 111 and / or the first support foot 112, as well as the first support foot 111 and the first support foot 112, may also be pivotally connected to each other at different locations around two different pivot axes.
[0105] The first support leg 111 and the second support leg 112 can be components for mounting wheels to facilitate the movement of the vehicle formed by the frame 1. The first support leg 111 can be a front support (serving as a front wheel carrier). Referring to FIG2, the first support leg 111 can, for example, be U-shaped, comprising two front members located on the left and right sides and a front crossbar connecting the two front members and extending generally in the left-right direction. In some embodiments, at least one front wheel seat 1111 can be mounted on the bottom of the first support leg 111. For example, two front wheel seats 1111 are respectively mounted on the bottom of the two front members of the first support leg 111. Each front wheel seat 1111 is used to mount a front wheel 20 to make the vehicle formed by the collapsible frame 1 movable. The second support leg 112 can be a rear support (serving as a rear wheel carrier). Referring to FIG4, the second support leg 112 can, for example, include two rear members located on the left and right sides. At least one rear wheel seat 1121 can be mounted on the bottom of the second support leg 112. For example, two rear wheel seats 1121 are respectively installed at the bottom of the two rear rods of the second support leg 112. Each rear wheel seat 1121 is used to install a rear wheel 21 so that the vehicle formed by the collapsible frame 1 is movable. In some other embodiments, the first support leg 111 as the front leg and the second support leg 112 as the rear leg may also have other structures besides those shown in the figure, such as X-shaped, etc., and one or more wheel seats may be adaptively installed at their bottoms for mounting wheels, depending on their different shapes. In some embodiments, referring to Figure 4, the first support leg 112 may also include a reinforcing rod 1122, which connects between the two rear rods and extends in the left-right direction. In this way, the structural strength of the second support leg 112 can be improved, thereby improving the overall structural strength of the frame 1.
[0106] The handlebar 12 can be a component for a user to grip to facilitate pushing or pulling the vehicle formed by the frame 1. In one embodiment of this application, the handlebar 12 is, for example, U-shaped, including two handlebars located on the left and right sides and a crossbar connecting the two handlebars. The bottom of the two handlebars can be pivotally connected to the first support leg 111 and / or the second support leg 112. For example, in the example shown in the figure, the bottom of the two handlebars is respectively pivotally connected to the top of the two front members of the first support leg 111 and the top of the two rear members of the second support leg 112. The top of the two handlebars are respectively connected to the two ends of the crossbar. The crossbar can be at least partially formed as a handrail 1211 for a user to grip to push or pull the vehicle formed by the collapsible frame 1.
[0107] When the frame 1 is in the extended position, as shown in Figure 7, the rider 12 and the first support leg 111 (e.g., between the handlebar and the front bar on the same side) can pivot open to a first angle, which can be approximately 180°. When the frame 1 is in the retracted position, as shown in Figure 10, the rider 12 and the first support leg 111 can pivot close to a second angle. The second angle can be an acute angle smaller than the first angle, for example, it can be an acute angle in the range of 0 to 60 degrees, for example, approximately 25 degrees. When the frame 1 is in the extended state, as shown in Figure 7, the first support leg 111 and the second support leg 112 (e.g., between the front link and the rear link on the same side) can pivot open to a third angle; when the frame 1 is in the retracted state, as shown in Figure 10, the first support leg 111 and the second support leg 112 can pivot close to a fourth angle, which is smaller than the third angle. In the example shown in the figure, the third angle can be a right angle of approximately 90 degrees, an obtuse angle slightly greater than 90 degrees, or an acute angle slightly less than 90 degrees, and the fourth angle can be, for example, but not limited to, an acute angle in the range of 60 degrees, for example, approximately 15 degrees. The fourth angle can be smaller than the second angle mentioned above. In other examples, the above angles can also be set to other suitable values as needed. In the example shown in the figure, in the unfolded state, the retracted state, and the state between the unfolded and retracted states, the second support leg 112 can always be positioned between the first support leg 111 and the rider 12. In other words, the sum of the angle between the second support leg 111 and the first support leg 112 and the angle between the rider 12 and the first support leg 112 can be equal to the angle between the rider 12 and the first support leg 111. Therefore, the setting of the angle between the rider 12 and the second support leg 112 in the unfolded state and the retracted state can be deduced based on the foregoing description.
[0108] The first frame 13 can be pivotally connected to the first support leg UK. For example, referring to Figures 1 and 2, the first frame 13 can be directly pivotally connected to the first support leg 111 near the rider 12. Referring to Figure 3B, the first frame 13 and the first support leg 111 can be pivotally connected to each other around the fifth pivot axis X5. It should be noted that in the example shown in the figures of the first embodiment of this application, the first frame 13 is not directly pivotally connected to the rider 12; however, in other embodiments, the first frame 13 can also be directly pivotally connected to the rider 12.
[0109] The first frame 13 can be a generally rectangular enclosure, which may generally include two long rods extending in the front-to-back direction and two short rods extending in the left-to-right direction connected to each other. The first frame 13 can be at least partially used to install or form the support part 30, such as a baby carrier, cradle, pet carrier, etc., to support a toddler, pet, or other object. It should be noted that setting the first frame 14 as a generally rectangular enclosure is only one optional embodiment of this application. The first frame 14 can also be set as other shapes, such as elliptical, trapezoidal, etc., and this application does not limit it in this way.
[0110] Referring to Figure 7, when the frame 1 is in the unfolded state, the first frame 14 is approximately horizontal, with its front and rear ends roughly at the same height vertically. The first frame 13 and the first support leg 111 (e.g., between the rear end of the long rod of the first frame 13 and the front rod on the same side) can pivot open to a fifth angle. Referring to Figure 10, when the frame 1 is in the retracted state, the first frame 14 rotates to a near-vertical tilted position, causing its front end to rotate to the top and its rear end to rotate to the bottom. The first frame 13 and the first support leg 111 can pivot close to a sixth angle, which is smaller than the fifth angle. In the example shown in the figure, the fifth angle can be, for example, but not limited to, an obtuse angle in the range of 60 to 150 degrees, such as approximately 140 degrees, and the sixth angle can be, for example, but not limited to, an acute angle in the range of 0 to 60 degrees, such as approximately 35 degrees. In other examples, the above angles can also be set to other suitable values as needed.
[0111] Referring to Figures 1 to 4, the retraction mechanism 14 is connected to the rider 12, the first support leg 111, the second support leg 112, and the first frame 13, respectively. The pivoting of the rider 12 relative to the second support leg 112 drives the retraction mechanism 14, which in turn causes the first support leg 111 and the first frame 13, which are connected to the retraction mechanism 14, to also move relative to the second support leg 112. Thus, the retraction mechanism 14 can be used to drive the various connected components, including the rider 12, the first support leg 111, the second support leg 112, and the first frame 13, to retract or extend together relative to each other. Specifically, when the retractable frame 1 is in the unfolded state, the rider 12 rotates relative to the first support leg 112 in a clockwise direction D1 as shown in Figure 1. This allows the rider 12 to retract towards the first support leg 112, while simultaneously driving the retraction mechanism 14. The retraction mechanism 14 then causes the first support leg 111 to pivot relative to the second support leg 112 in a counter-clockwise direction D2 as shown in Figure 1 and retract towards the second support leg 112. Furthermore, the retraction mechanism 14 causes the first frame 13 to rotate from a generally horizontal position in a clockwise direction D1 as shown in Figure 1 to a near-vertical position and retract towards the first support leg 112, thus switching the retractable frame 1 from the unfolded state to the retracted state. In one embodiment of this application, referring to Figure 3A, the retraction mechanism 14 may include a first connector 141, a second connector 142, and a third connector 143. The first connector 141 is connected to the rider 12. The second connector 142 is connected to the second support leg 112 and is pivotally connected to the first connector 141. The third connector 143 is connected to the first support leg 111 and the first frame 13, and is pivotally connected to the first connector 141. Thus, the rider 12 is connected to the first connecting member 141, which is pivotally connected to the second connecting member 142 and the third connecting member 143 respectively. The second connecting member 142 and the third connecting member 143 are respectively connected to the second support leg 112, the first support leg 111, and the first frame 13. Thus, the relative movement of the rider 12 with respect to the second support leg 112 can drive the first connecting member 141, which in turn drives the second connecting member 142 and the third connecting member 143 to move. Then, the movement of the second connecting member 142 and the third connecting member 143 drives the first support leg 111 and the first frame 13 to move relative to the first support leg 112.This enables the retraction or extension via the retraction mechanism 14. It should be noted that in the example shown in the figures of the first embodiment of this application, the second connector 143 is directly connected to the first frame 13. However, in some other embodiments, the first connector 143 may also be indirectly connected to the first frame 13 via other components. For example, the retraction mechanism 14 may also include an additional connector, with a third connector 143 pivotally connected to it at one location, and the first frame 13 pivotally connected to it at another location different from the first location, thereby indirectly and movably connecting the third connector 143 to the first frame 13 via the connector.
[0112] The connection between the aforementioned folding mechanism 14 and each component can be a movable connection (including a sliding connection and / or a rotating connection) or a fixed connection. By appropriately configuring the connection methods and relationships between the components, the folding mechanism 14 can drive the folding and unfolding of the components in various ways. In one embodiment of this application, referring to Figures 3A and 3B, the first connecting member 141 and the driver 12 are pivotally connected to each other around the first pivot axis X2. The first connecting member 141, the first connecting member 142, and the third connecting member 143 are pivotally connected to each other around the third pivot axis X3. The second connecting member 142 and the second support leg 112 are pivotally connected to each other around the fourth pivot axis X4. The first connecting member 143 and the first support leg 111 are pivotally connected to each other around the second pivot axis X5. In the case where the third connector 143 is directly connected to the first frame 13, in one embodiment of this application, the third connector 143 can be directly connected to the first frame 13 at the first connection point C1. In this embodiment, in the state shown in FIG2, each pivot axis XI to X5 is parallel to each other and extends in the left-right direction. Each pivot axis XI to X5 and the first connection point C1 are distributed at different positions in the planes in the front-back direction and the up-down direction, and do not coincide with each other. For example, each connector may generally have a sheet-like structure extending in the planes in the front-back direction and the up-down direction. The second pivot axis X2 and the third pivot axis X3 pass through two different points on the first connector 141. The third pivot axis X3 and the fourth pivot axis X4 pass through two different points on the second connector 142. The third pivot axis X3 and the fifth pivot axis X5 pass through the first connection point C1 at three different points on the third connector 143, and these three points are not collinear, forming a triangle. In the example above, the third connector 143 is fixedly connected to the first frame 13 at the first connection point C1. However, in some embodiments, the third connector 143 may also be pivotally connected to the first frame 13 at the first connection point C1 about a pivot axis extending in the left-right direction. In the example above, the first connector 141, the second connector 142, and the third connector 143 are pivotally connected to each other about the same third pivot axis X3. However, in some embodiments, the first connector 141 and the second connector 142, and the first connector 141 and the third connector 143 may also be pivotally connected to each other about two different pivot axes.
[0113] In one embodiment of this application, the collapsible frame 1 may further include a second frame 15. The first frame 15 is located below the first frame 13, and may be formed, for example, as a chassis. The second frame 15 may also be a generally rectangular frame, which may generally include two long rods extending in a front-rear direction and two short rods extending in a left-right direction connected to each other. The second frame 15 may be used together with the first frame 14 to mount or form the support portion 30. For example, the bottom of the support portion 30 may be placed or formed on the second frame 15, while the sidewall portion of the support portion 30 may be at least partially placed or formed between the first frame 14 and the second frame 15. The second frame 15 may be mounted on the second support foot 112 and / or the first support foot 111. For example, referring to FIG. 4, the second frame 15 can be rotatably mounted on the reinforcing rod 1122 in the second support leg 112, such that the second frame 15 can rotate about the reinforcing rod 1122 as an axis of rotation in a clockwise direction D1 or a counterclockwise direction D2 as shown in FIG. 1. Specifically, during the switching of the retractable frame 1 from the unfolded state to the retracted state, the movement of the retraction mechanism 14 (specifically, for example, the fourth connector 144 described later) can drive the second frame 15 to rotate about the reinforcing rod 1122 in a clockwise direction D1 as shown in FIG. 1 from a generally horizontal position to a near-vertical position. In one embodiment, referring to FIG. 4, the second frame 15 can be rotatably mounted on the reinforcing rod 1122 in the second support leg 112 via a rotating connector 151. The rotating connector 151 may include a sleeve portion 1511 extending in the front-rear direction, which is sleeved on the long rod of the first frame 15. The rotating connector 151 also includes a C-shaped clamping portion 1512 connecting the sleeve portion 1511 to the side. The C-shaped clamping portion 1512 is movably clamped on the reinforcing rod 1122, so that the second frame 15 can be placed on the reinforcing rod 1122 and can also rotate around the reinforcing rod 1122.
[0114] When the frame 1 is in the extended state, the second frame 15 is approximately parallel to the first frame 13, that is, the second frame 15 is also approximately horizontal, and the second frame 15 is approximately below the first frame 13, separated from the first frame 13 by a first predetermined distance (for example, approximately corresponding to the height of the housing of the support portion 30). When the frame 1 is in the folded state, the second frame 15 can also be approximately parallel to the first frame 13, that is, the first frame 15 is also nearly vertical, and the first frame 15 is separated from the first frame 13 by a second predetermined distance, which is less than the first predetermined distance so that in the folded state, the first frame 15 is close to the first frame 13. In the example shown in the figure, referring to Figure 10, in the folded state, the second frame 15 is close to the first frame 13 but with a small gap. However, for example, in some examples, when the second predetermined distance is zero, in the folded state, the second frame 15 can be flush with the first frame 13. In general, the second frame 15 can be approximately parallel to the first frame 13 in both the extended and retracted states. Correspondingly, when the frame 1 is in the extended state (see Figure 7), the first frame 15 and the first support leg 111 (e.g., between the long rod of the first frame 15 and the front rod on the same side) can also pivot open to the aforementioned fifth angle; when the frame 1 is in the retracted state (see Figure 10), the second frame 15 and the first support leg 111 can also pivot close to the aforementioned sixth angle. In other examples, the aforementioned angles of the second frame 15 can also be set to other suitable values as needed; for example, the second frame 15 and the first support leg 111 can also pivot close to an angle slightly larger or slightly smaller than the aforementioned sixth angle.
[0115] In embodiments where the frame 1 also includes a second frame 15, the folding mechanism 14 can also be connected to the first frame 15, so that the second frame 15 is folded or unfolded synchronously during folding and unfolding. In one embodiment of this application, referring to FIG3A, the folding mechanism 14 can also include a fourth connector 144, which is connected to the second frame 15, and is also connected to one of the first connector 141, the first connector 142, and the third connector 143, so that when the relative movement of the rider 12 drives the first connector 141 and drives the second connector 142 and the third connector 143 to move, it also drives the fourth connector 144, thereby driving the second frame 15 to move relative to each other through the fourth connector. For example, referring to Figures 3A and 3B, the fourth connector 144 and the second connector 142 can be pivotally connected to each other about the sixth pivot axis X6, and the fourth connector 144 and the second frame 15 are pivotally connected to each other about the seventh pivot axis X7. Furthermore, as described above, the second frame 15 can rotate about the reinforcing rod 1122 as its axis of rotation. Accordingly, referring to Figure 3B, with the longitudinal axis of the reinforcing rod 1122 as the eighth pivot axis X8, the second frame 15 can pivot relative to the first support leg 112 about the eighth pivot axis X8. In the configuration shown in Figure 2, the pivot axes X6 to X7 are parallel to each other and extend in the left-right direction. The pivot axes X6 to X8, the aforementioned pivot axes X1 to X5, and the first connection point C1 are also distributed at different positions in the planes of the front-back and vertical directions, and do not coincide with each other. The third pivot axis X3, the fourth pivot axis X4, and the sixth pivot axis X6 are located at three different points on the first connector 142, and these three points are not collinear, forming a triangle. The sixth pivot axis X7 and the seventh pivot axis X8 are located at two different points on the fourth connector 144. In other examples, the fourth connector 144 may also be pivotally connected to the first connector 141 or the third connector 143 around other pivot axes. It is understood that the positions of the aforementioned pivot axes in the front-back and vertical planes of this application are not fixed, but move together with the movement of the components they pass through.
[0116] In one embodiment of this application, referring to Figures 1, 7 to 10, the rider 12 may include a first segment 121 that is relatively far from the first support leg 111 and / or the first support leg 112, and a first segment 122 that is adjacent to the first support leg 111 and / or the first support leg 112. The first segment 121 and the first segment 122 may be pivotally connected to each other via a first pivot joint 123, so that the first segment 121 can pivot relative to the second segment 122. For example, referring to Figure 1, the first section 121 may include a crossbar for forming the armrest 1211, and two upper handlebars on the left and right sides connected to both ends of the crossbar. The second section 122 may include two lower handlebars on the left and right sides connected between the bottom ends of the two upper handlebars and the top ends of the two front members of the first support leg 111. The two upper handlebars can be pivotally connected to the two lower handlebars on the same side via two first pivot joints 123 respectively. The first section 121 can pivot relative to the second section 122 between the extended position and the retracted position. When the frame 1 is in the extended state, referring to Figure 7, the handlebar 12 is in the extended state, and the first section 121 is in the extended position relative to the second section 122. The first section 121 and the second section 122 (e.g., between the upper handlebars and the lower handlebars on the same side) can pivotally open to a seventh angle, which can be approximately 180 degrees. When the frame 1 is in the retracted state (see Figure 10), the rider 12 is in the retracted state, and the first section 121 is in the retracted position relative to the second section 122. The first section 121 and the second section 122 can pivot and retract to the eighth angle. The eighth angle can be smaller than the seventh angle, for example, it can be an angle in the range of 0 to 60 degrees, for example, about 0 degrees, that is, the first section 121 and the second section 122 can be folded and fitted together, see the rider 120 in Figures 8 to 10. In such a practical example, when it is necessary to fold the frame 1, before rotating the rider 12 relative to the first support leg 111, the first section 121 in the rider 12 can be rotated relative to the second section 122 until they are folded together, and then the folded rider 12 can be rotated relative to the second support leg 112 so that the other parts can be folded together by means of the folding mechanism 14, so as to realize the folding of the frame 1.
[0117] In some embodiments, locking and unlocking mechanisms can be provided to prevent or allow switching between the unfolding and retracting of the retractable frame 1, thereby avoiding undesirable retraction of the retractable frame 1 due to external forces during unfolding use. In one embodiment of this application, the aforementioned first pivot joint 123 is a locking joint, which can switch between an unlocked state that allows rotation of the first section 121 relative to the second section 122 and a locked state that prevents rotation of the first section 121 relative to the second section 122. A first unlocking member 1212 may be provided on the rider 12. In the example shown in the figure, the first unlocking member 1212 may be provided on the handlebar portion 1211 of the first section 121 to facilitate user operation. However, in some other embodiments, the first unlocking member 1212 may also be provided on other parts of the rider 12, such as the aforementioned upper handlebar or lower handlebar. First, the pivot joint 123 can be configured such that when the first release member 1212 is not operated and the first section 121 is in the extended position relative to the second section 122, the second pivot joint 123 remains in a locked state; and when the first release member 1212 is operated, the second pivot joint 123 is unlocked and switched to an unlocked state. Furthermore, the aforementioned first pivot joint 124 is also a locking joint, capable of switching between an unlocked state that allows rotation between the first support leg 111, the second support leg 112, and the rider 12 (e.g., specifically the second section 122 in this embodiment) and a locked state that prohibits rotation between the first support leg 111, the second support leg 112, and the rider 12 (e.g., specifically the second section 122 in this embodiment). The first pivot joint 124 can be configured such that when the first section 121 is in the extended position relative to the second section 122, the first pivot joint 124 is locked and remains in the locked state; and when the first section 121 is in the retracted position relative to the second section 122, the first pivot joint 124 is unlocked and switched to the unlocked state. Thus, when the retractable frame 1 is in the extended state, when the user operates the first release member 1212, the second pivot joint 123 is unlocked, allowing the first section 121 to be switched from the extended position to the retracted position relative to the second section 122. Subsequently, when the user switches the first section 121 from the unfolded position to the retracted position relative to the first section 122, the first pivot joint 124 is also released, allowing the driver 12 to rotate and retract relative to the first support leg 112 via the operation of the retraction mechanism 14, thereby causing the first support leg 111, the second support leg 112 and the second section 122 to retract relative to each other.
[0118] Referring now to Figures 7 to 10, and in conjunction with Figures 3A and 3B, 6A and 6B, the folding and unfolding process of a foldable frame 1 according to an embodiment of this application will be described. In Figures 7 to 10, a folding mechanism 14 in each frame 1 is also shown below to more clearly show the state of each connector in the folding mechanism 14. Furthermore, in the folding mechanism 14 additionally shown in Figures 7 to 10, the approximate position of the second support leg 112 is indicated by a dashed line S1, the approximate position of the first frame 13 is indicated by a dashed line S2, and the approximate position of the second frame 15 is indicated by a dashed line S3.
[0119] As shown in Figures 7, 3A, and 3B, the retractable frame 1 is in the extended state, at least some or all of its components are in the extended position relative to each other. The second pivot joint 123 and the first pivot joint 124 are both locked. When the retractable frame 1 needs to be retracted, the user operates the first release mechanism 1212 to release the second pivot joint 123, thereby allowing the first segment 121 to pivot relative to the second segment 122. In this case, the user drives the first segment 121 to pivot relative to the second segment 122 in a manner that reduces the angle between the first segment 121 and the second segment 122, for example, by pushing the first segment 121 forward and downward relative to the second segment 122, causing the first segment 121 to pivot about the first pivot joint 123 relative to the second segment 122 in the counter-clockwise direction D2 shown in Figure 7. When the first segment 121 pivots relative to the second segment 122 to a retracted position, for example, when the first segment 121 is in contact with the second segment 122, the first pivot joint 124 is released, thereby allowing pivoting between the first support leg 111, the second support leg 112, and the second segment 122. In this case, the user drives the rider 12 to pivot relative to the first support leg 112 in a manner that reduces the angle between the rider 12 and the second support leg 112, for example, by pressing the rider 12 downward and forward, causing the rider 12 to pivot relative to the first support leg 112 about the first pivot axis XI in a clockwise direction D1 as shown in FIG. 7, thereby bringing the rider 12 and the second support leg 112 together.
[0120] As shown in Figures 8, 9, 6A, and 6B, the pivoting of the rider 12 relative to the second support leg 112 around the first pivot axis XI in a clockwise direction D1 will cause the first connector 141 to move generally downward and forward relative to the second support leg 112 due to the downward rotation of the second pivot axis X2 passing through the rider 12 and the first connector 141 around the first pivot axis XI in a clockwise direction D1. This will cause the second pivot axis X3 passing through the first connector 141 to move generally downward and forward relative to the first support leg 112. The third pivot axis X3 moves forward and backward relative to the first support leg 112, which in turn causes the second connector 142, through which the third pivot axis X3 passes, to rotate counterclockwise around the fourth pivot axis X4 in the direction D2, and causes the third connector 143, through which the third pivot axis X3 passes, to rotate clockwise around the fifth pivot axis X5 in the direction D1.
[0121] As the second connector 142 and the third connector 143 rotate synchronously toward each other in opposite directions, they rotate relative to each other and retract, causing the fifth pivot axis X5 passing through the third connector 143 to move toward the second support leg 112, which in turn causes the first support leg 111 passing through the fifth pivot axis X5 to pivot toward the second support leg 112 and move toward it.
[0122] During the rotation of the third connecting member 143 around the fifth pivot axis X5 in a clockwise direction D1, the first frame 13 is also driven to rotate around the fifth pivot axis X5 in a clockwise direction D1. In some embodiments, during the rotation of the third connecting member 143 around the fifth pivot axis X5 in a clockwise direction D1, under the combined action of the fifth pivot axis X5 passing through the first frame 13 and the first connection point C1 provided on the first frame 13, the first frame 13 may also be driven to rotate around the fifth pivot axis X5 in a clockwise direction D1, such that the front side of the first frame 13 rotates upward and the rear side of the first frame 13 rotates downward, the first frame 13 rotates from a generally horizontal position to a near vertical position, and the rear side of the first frame 13 converges towards the first support leg 112, thereby the first frame 13 and the second support leg 112 converge towards each other.
[0123] Furthermore, during the process of the second connector 142 rotating counterclockwise around the fourth pivot axis X4 in the direction D2, the sixth pivot axis X6 passing through the second connector 142 is driven to move toward the second support leg 112, causing the fourth connector 144 passing through the sixth pivot axis X6 to rotate clockwise around the sixth pivot axis X6 in the direction D1, thereby causing the seventh pivot axis X7 passing through the fourth connector 144 to move upward relative to the second support leg 112. The upward movement of the seventh pivot axis X7 causes the second frame 15 to rotate clockwise in the direction D1 relative to the first support leg 112 around the reinforcing rod 1122 (i.e., around the eighth pivot axis X8). This causes the front side of the second frame 15 to rotate upward and the rear side to rotate downward. The second frame 15 rotates from a generally horizontal position to a near-vertical position, with the front side of the second frame 15 moving closer to the second support leg 112. The second frame 15 also moves closer to and retracts with the first frame 13. As shown in Figure 10, as the rider 12 and the first support leg 112 retract to their folded positions, the second support leg 111, the first frame 13, and the second frame 15 also retract to their folded positions with the second support leg 112, thus switching the retractable frame 1 to the folded state.
[0124] As shown in Figure 10, the collapsible frame 1 is in the collapsed state, at least some or all of its components are in the collapsed position relative to each other. Both the second pivot joint 123 and the first pivot joint 124 are in the unlocked state. When the collapsible frame 1 needs to be extended, the user drives the rider 12 to pivot relative to the second support leg 112 by increasing the angle between the rider 12 and the second support leg 112, for example, by lifting the rider 12 backward and upward, causing the rider 12 to pivot counterclockwise around the first pivot axis XI relative to the first support leg 112 in the direction D2, thereby extending the rider 12 and the first support leg 112 relative to each other.
[0125] As shown in Figures 8, 9, 6A, and 6B, the driver 12 pivots counterclockwise around the first pivot axis XI with respect to the second support leg 112. This is because the second pivot axis X2, which passes through the driver 12 and the first connector 141, also rotates upward around the first pivot axis XI. This causes the first connector 141 to move generally backward and upward relative to the second support leg 112, resulting in the third pivot axis X3, which passes through the first connector 141, moving generally backward and upward relative to the first support leg 112. The backward and upward movement of the third pivot axis X3 relative to the first support leg 112 will cause the second connector 142, which is connected to the first pivot axis X3, to rotate clockwise around the fourth pivot axis X4 in the direction D1, and cause the third connector 143, which is connected to the third pivot axis X3, to rotate counterclockwise around the third pivot axis X5 in the direction D2.
[0126] As the second connector 142 and the third connector 143 rotate synchronously in opposite directions away from each other, they rotate and unfold relative to each other, causing the fifth pivot axis X5 passing through the third connector 143 to move away from the second support leg 112, which in turn causes the first support leg 111 passing through the fifth pivot axis X5 to also pivot away from the second support leg 112 and unfold relative to the second support leg 112.
[0127] During the rotation of the third connector 143 around the fifth pivot axis X5 in a counterclockwise direction D2, the first frame 13 is also driven to rotate around the fifth pivot axis X5 in a counterclockwise direction D2. In some embodiments, under the combined action of the fifth pivot axis X5 passing through the first frame 13 and the first connection point C1 provided on the first frame 13, the first frame 13 can also be driven to rotate around the fifth pivot axis X5 in a counterclockwise direction D2, causing the front side of the first frame 13 to rotate downward and the rear side of the first frame 13 to rotate upward, the first frame 13 to rotate from a near-vertical position to a generally horizontal position, and the rear side of the first frame 13 to move away from the second support leg 112, thereby allowing the first frame 13 and the second support leg 112 to unfold relative to each other.
[0128] Furthermore, during the rotation of the second connector 142 around the fourth pivot axis X4 in a clockwise direction D1, the sixth pivot axis X6 passing through the second connector 142 is driven away from the second support leg 112, causing the fourth connector 144 passing through the sixth pivot axis X6 to rotate around the sixth pivot axis X6 in a counterclockwise direction D2, thereby causing the seventh pivot axis X7 passing through the fourth connector 144 to move downward relative to the first support leg 112. The upward movement of the seventh pivot axis X7 causes the second frame 15 to rotate counterclockwise D2 relative to the first support leg 112 around the reinforcing rod 1122 (i.e., around the eighth pivot axis X8). This causes the front side of the second frame 15 to rotate forward and downward, and the rear side of the second frame 15 to rotate backward and upward. The second frame 15 rotates from a near-vertical position to a roughly horizontal position. The front side of the second frame 15 moves away from the second support leg 112, and the second frame 15 also moves away from the first frame 13 and unfolds from the first frame 13. As the rider 12 and the second support leg 112 unfold to their unfolded state, the first support leg 111, the first frame 13, and the second frame 15 also unfold to their unfolded state along with the second support leg 112. In this case, the user drives the first section 121 to pivot relative to the second section 122 by increasing the angle between the two sections, for example, by pulling the first section 121 upward and backward, causing the first section 121 to pivot clockwise D1 relative to the second section 122 around the second pivot joint 123. When the first section 121 pivots relative to the second section 122 to the unfolded position, for example, when the first section 121 and the second section 122 are approximately 180° apart, the first pivot joint 124 returns to locking, and the second pivot joint 123 also returns to locking. Thus, as shown in Figures 7, 3A, and 3B, the retractable frame 1 can be switched to the unfolded state.
[0129] In one embodiment of this application, referring to FIG1, the collapsible frame 1 may further include a support plate 16. The support plate 16 rests on or is fixed to the second frame 15. The support portion 30 may be placed on the support plate 16, so that the support plate 16 can provide support for the support portion 30, allowing the support portion 30 to be more securely placed on the second frame 15 via the support plate 16. In the example including the support plate 16, the support plate 16 may remain close to the second frame 15 in the collapsed and unfolded states of the frame 1, and in the state between the folded and unfolded states, so as to move with the movement of the second frame 15. In some embodiments, such as referring to FIG2 and FIG4, the collapsible frame 1 may omit the support plate 16. Accordingly, the support portion 30 may be placed directly on, mounted, or formed on the second frame 15. In such embodiments, the support portion 30, such as a pet carrier, may include a support member, such as a base plate, at its bottom to enhance the support performance of its bottom.
[0130] In one embodiment of this application, referring to Figures 1, 11 to 13, the retractable frame 1 may further include a canopy bracket 17, which is mounted on the first frame 13. The canopy bracket 17 can support and form a canopy 32 of the load-bearing portion 30, which can provide shade, mosquito protection, and / or wind protection for the load-bearing portion 30. Optionally, the canopy bracket 17 may be pivotally disposed on the first frame 14, and the canopy bracket 17 may pivot relative to the first frame 14 between an open position and a closed position. When in the closed position, referring to Figures 11, 14 and 15, the canopy bracket 17 pivots to the front side close to the first frame 13; when in the open position, referring to Figures 13 and 16, the canopy bracket 17 pivots to the rear side close to the first frame 13. Furthermore, Figure 12 also shows the canopy support 17 pivoted to a position between the closed and open positions relative to the first frame 14. Thus, by pivoting the canopy support 17 relative to the first frame 14, the canopy 32 can be opened to different angles. In the example including the canopy support 17, in the retracted and extended states of the frame 1, and in the state between the retracted and extended states, the canopy support 17 can be in its open position, thus being substantially close to the first frame 13, and can move together with the movement of the first frame 13. In some embodiments, such as referring to Figures 2 and 4, the retractable frame 1 may omit the canopy support 17. For example, the support portion 30 may have its own canopy support, without the canopy support being mounted on the first frame 13.
[0131] In one embodiment of this application, referring to Figures 1, 11 to 13, the first frame 13 may include a first frame 131 and a second frame 132. The second frame 132 is pivotally connected to a first support leg 111. The first frame 131 and the second frame 132 may each be U-shaped, thereby combining to form a perimeter frame. The first frame 131 may be pivotally connected to the first frame 132 via a second pivot joint 133, so that the first frame 131 can pivot relative to the first frame 132. The first frame 131 can pivot relative to the second frame 132 between a closed position and an open position. Referring to Figures 1 and 11, when the first frame 131 is in the closed position relative to the second frame 132, both the first frame 131 and the second frame 132 may be generally horizontal, and the upper angle between the first frame 131 and the second frame 132 may be approximately 180°. When the first frame 131 is in the open position relative to the second frame 132, as shown in Figures 12 and 13, the second frame 132 remains horizontal, while the first frame 131 tilts downwards. The upper angle between the second frame 131 and the first frame 132 can be opened to a maximum of 180 degrees, for example, approximately 250 degrees. In this state, as shown in Figures 15 and 16, the front sidewall of the box body 31 formed on the first frame 13 can be at least partially opened downwards to expose the accommodating space within the support portion 30, thereby facilitating the pet to cross the downwardly opening door and enter or exit the accommodating space within the support portion 30.
[0132] Referring to Figures 14 to 16, Figures 14 to 16 show an example of a support portion 30 used as a pet carrier formed by a first frame 14, and the support portion 30 being placed or secured to a second frame 15. The support portion 30 includes a carrier body 31 and a canopy 32 covering the carrier body 31. The carrier body 31 includes a first cover that extends and forms the bottom wall of the carrier body 31 and side walls extending circumferentially upward from the bottom wall. The bottom wall of the carrier body 31 can be placed or secured to the second frame 15. The side walls of the carrier body 31 extend generally between the first frame 14 and the second frame 15. The top of the first cover is open to form an opening at the top of the carrier body 31, and the top of the first cover extends generally circumferentially along the first frame 14 and is secured to the second frame 14. In Figures 14 to 16, the first frame 131 is covered by the second cover and is not visible, but its approximate location is indicated for ease of understanding. As described above, the first frame 13 includes a first frame 131 and a second frame 132, which are pivotally connected to each other, allowing the first frame 131 to be pivoted upward relative to the second frame 132 to a closed position and downward relative to the second frame 132 to an open position. Referring to Figure 14, and in conjunction with Figure 11, when the first frame 131 is in the closed position relative to the second frame 132, the front sidewall of the box body 31 formed on the first frame 13 is completely closed, providing a safe and stable carrying space for the pet carried within the carrying portion 30. When the first frame 131 is rotated downwards relative to the second frame 132 to the open position, as shown in Figures 15 and 16, and in conjunction with Figures 12 and 13, the front sidewall of the box body 31 formed on the first frame 13 can be at least partially opened downwards to expose the accommodating space within the support portion 30, thereby facilitating the pet to cross the downwardly opening and enter and exit the accommodating space within the support portion 30. A canopy 32 can be fitted over the opening above the box body 31. The canopy 32 may include a second cover. The first cover may have a size that substantially covers the upper opening of the box body 31. The rear edge of the second cover may be fixed to or rest on the top of the rear side wall of the box body 31 and the top of the left and right side walls adjacent to the rear side wall. The front side of the second cover may be fixed to the canopy bracket 17. The canopy bracket 17 is pivotally mounted on the first frame 14, so that the canopy 32 can be rotated and opened to different angles as the canopy bracket 17 pivots.In Figures 14 to 16, the canopy support 17 is covered and not visible by the second cover, but its approximate position is indicated for ease of understanding. Referring to Figures 14 and 15, and in conjunction with Figure 11, when the canopy support 17 is pivoted forward to the closed position, the canopy support 17 can maximally cover the accommodating space within the support portion 30 to provide a shielding effect. Referring to Figure 16, and in conjunction with Figure 13, when the canopy support 17 is pivoted backward to the open position, the canopy support 17 can maximally expose the accommodating space within the support portion 30 to facilitate pet ventilation or access to the accommodating space within the support portion 30. Thus, the accommodating space within the support portion 30 can be exposed to varying degrees through the pivoting of the canopy support 17.
[0133] In one embodiment of this application, referring to Figures 11 to 13, the third pivot joint 133 may be a locking joint, which may include a second release member. The third pivot joint 133 is configured such that: when the first frame 131 is in the open position, the first frame 131 can be switched from the open position to the closed position without operating the second release member; when the first frame 131 is in the closed position, the first frame 131 cannot be switched from the closed position to the open position without operating the second release member, and when the second release member is operated, the first frame 131 can be switched from the closed position to the open position. Thus, when the first frame 131 is in the closed position, i.e., the front side wall of the support portion 30 is closed, the first frame 131 can only be pressed to the open position when the second release member is operated, thereby avoiding the dangerous situation where the pet inside the support portion 30 may fall out due to the first frame 131 being mistakenly pivoted to the open position by external force. Furthermore, when the first frame 131 is in the open position, there is no need to operate the second release member; the first frame 131 can be directly pulled up to the closed position, and the third pivot joint 133 will automatically lock, thus facilitating user operation. In another embodiment of this invention, referring to Figures 11 to 13, the third pivot joint 133 may be a locking joint, which may include the second release member. The third pivot joint 133 may also be configured such that: when the second release member is not operated, the first frame 131 is allowed to pivot in the direction from the open position to the closed position, and pivoting of the first frame 131 in the direction from the closed position to the open position is prohibited; and when the second release member is operated, both pivoting of the first frame 131 in the direction from the open position to the closed position and pivoting of the first frame 131 in the direction from the closed position to the open position are allowed. Thus, without operating the second release mechanism, only one-way operation of pulling the first frame 131 upwards is permitted, while pressing the first frame 131 downwards is not allowed. This also avoids the danger of the pet falling out of the support section 30 due to external force accidentally pivoting the first frame 131 downwards to the open position. At the same time, it allows the user to directly pull the first frame 131 upwards to the closed position and automatically lock the third pivot joint 133, thus facilitating user operation.The third pivot joint 133 described above can be implemented through different structures. In one embodiment of this application, referring to FIG17, the third pivot joint 133 may include a first unlocking member 1331, a first fixing seat 1332, a first fixing seat 1333, a locking member 1334, and an elastic member 1335. The first fixing seat 1332 is mounted on the end of the first frame 131 near the second frame 132. The second fixing seat 1333 is mounted on the end of the second frame 132 near the first frame 131. The first fixing seat 1332 and the second fixing seat 1333 may partially face each other to mate with each other.
[0134] The locking member 1334 can be clamped between the first fixing seat 1332 and the second fixing seat 1333 facing each other. The locking member 1334 is used to cooperate with the first fixing seat 1332 or the second fixing seat 1333 to lock the second pivot joint 133, or to release the cooperation with the first fixing seat 1332 or the first fixing seat 1333 to release the locking of the third pivot joint 133. Specifically, referring to FIG. 20, a first protrusion 13321 can be provided on the side of the first fixing seat 1332 facing the locking member 1334. The first protrusion 13321 has a vertical surface 13321a on a first side facing the counterclockwise direction D3 in FIG. 20 in the circumferential direction, and an inclined surface 13321b on a second side facing the clockwise direction D4 in FIG. 20 in the circumferential direction. Referring to Figure 19, a first recess 13341 may be provided on the side of the locking member 1334 facing the first fixing seat 1332. The first recess 13341 has a vertical surface 13341a on its first side facing clockwise direction D3 in Figure 19 in the circumferential direction, and an inclined surface 13341b on its first side facing counterclockwise direction D4 in Figure 19 in the circumferential direction. The first protrusions 13321 can be engaged with the first recess 13341, and they may have approximately the same shape. A second recess 13342 may also be provided on the side of the locking member 1334 facing the first fixing seat 1332. The second recess 13342 has a vertical surface 13342a on its first circumferential side and an inclined surface 13342b on its second circumferential side. The first protrusion 13321 can be engaged with the second recess 13342. The second recess 13342 can extend in the circumferential direction to allow the first protrusion 13321 to slide circumferentially within the first recess 13342. The first recess 13341 and the second recess 13342 are separated by a second protrusion 13343. In other words, the second protrusion 13343 has the inclined surface 13342b on its first circumferential side and the vertical surface 13341a on its second circumferential side. It is understood that when the third pivot joint 133 shown in Figures 17 to 20 is the third pivot joint 133 located on the right side of the frame 1, the clockwise direction D3 in Figure 19 corresponds to the counterclockwise direction D2 in Figure 1 and also corresponds to the counterclockwise direction D3 in Figure 20; the counterclockwise direction D4 in Figure 19 corresponds to the clockwise direction D1 in Figure 1 and also corresponds to the clockwise direction D3 in Figure 20.
[0135] The locking member 1334 is movable in its axial direction D5 between a first axial position closer to the first fixed base 1332 (see FIG. 18B) and a second axial position farther from the first fixed base 1332 (see FIG. 18A). An elastic member 1335 is disposed between the first fixed base 1332 and / or the first fixed base 1333 and the locking member 1335, and is configured to provide an elastic force to the locking member 1334 tending towards the first axial position. In the example shown in FIG. 17, the elastic member 1335 is sandwiched between the locking member 1334 and the second fixed base 1333, and the elastic member 1335 is compressed to provide an elastic restoring force to the locking member 1334 toward the first fixed base 1332, thereby pressing the locking member 1334 toward the first axial position. The elastic element 1335 is, for example, a spring; alternatively, it can be an elastomer, an elastic sheet, or other elastic structures. The elastic element 1335 can also provide elastic restoring force through tension.
[0136] The second unlocking member 1331 is movably inserted into the first fixing seat 1332, thus exposing the operating part of the second unlocking member 1331 on the side of the first fixing seat 1332 away from the locking member 1334. A contact foot of the second unlocking member 1331 extends from the side facing the locking member 1334. Movement of the second unlocking member 1331 can cause its contact foot to move and contact the locking member 1334. Referring to Figure 18A, and in conjunction with Figures 19 and 20, when the second unlocking member 1331 is not operated, when the first protrusion 13321 faces the first recess 13341, and under the force of the elastic member 1335, the locking member 1334 is pressed towards a first axial position closer to the first fixing seat 1332, so that the first protrusion 13321 at least partially enters the first recess 13341. In the first frame 131, vertical surfaces 13321a and 13341a are opposite each other, and inclined surfaces 13321b and 13341b are opposite each other. At this time, the first frame 131 is in the closed position, and the first fixing seat 1332 needs to rotate relative to the locking member 1334 in a clockwise direction as shown in FIG. 19 to move the first frame 131 from the closed position to the open position. However, due to the blocking engagement of the vertical surfaces 13321a and 13341a facing each other on the clockwise side as shown in FIG. 19, the first fixing seat 133 cannot rotate in the clockwise direction as shown in FIG. 19 in this first radial position, thus preventing the first frame 131 from rotating from the closed position to the open position; that is, the third pivot joint 133 is in a locked state.
[0137] In this case, when the second release member 1331 is operated, for example, when the operating part of the second release member 1331 is pressed (see FIG. 18B), the contact of the second release member 1331 presses against the locking member 1334, causing the locking member 1334 to overcome the elastic restoring force of the elastic member 1335 and move away from the first fixed seat 1332 to reach the second axial position. At the second axial position, the first protrusion 13321 is completely pulled out from the first part 13341, so that the vertical surfaces 13321a and 13341a are no longer opposite and obstructing each other, thereby allowing the first frame 131 to rotate from the closed position to the open position, that is, the second pivot joint 133 is unlocked and in the unlocked state. In this state, the user can rotate the first frame 131 from the closed position toward the open position, causing the first protrusion 13321 to cross the second protrusion 13343 between the first recess 13341 and the first recess 13342 and face the second recess 13342. When the user stops operating the second release member 1331, the first protrusion 13321, under the force of the elastic member 1335, can return to the first axial position and at least partially engage with the second recess 13342. It can continue to rotate along the second recess 13342 in the clockwise direction D3 shown in FIG. 19, and correspondingly, the first frame 131 also continues to rotate toward the open position. When the first protrusion 13321 engages with the second recess 13342, the vertical surface 13321a faces the vertical surface 13342a, and the inclined surface 13321b faces the inclined surface 13342b. When the first protrusion 13321 rotates to the first side of the second recess 13342 in its circumferential direction, the first frame 131 rotates to the open position. At this time, due to the blocking engagement of the vertical surfaces 13321a and 13342a facing each other on the clockwise direction D3 side as shown in FIG. 19, the first fixing seat 133 cannot continue to rotate in the clockwise direction as shown in FIG. 19 in this first clockwise position, thereby preventing the first frame 131 from continuing to rotate beyond the open position.
[0138] Conversely, without operating the first unlocking member 1331, when the first protrusion 13321 is engaged in the second recess 13342 under the force of the elastic member 1335 and is located on the first side of the second recess 13342 in its circumferential direction, the first frame 131 is in its open position. At this time, the user can pull the first frame 131 upward to rotate the first protrusion 13321 along the second recess 13342 in the counterclockwise direction D4 shown in FIG. 19. When the first protrusion 13321 rotates to the second side of the second recess 13342 in its circumferential direction, the first protrusion 13321 can gradually slide along the inclined surface 13342b through the sliding engagement of the opposing inclined surfaces 13321b and 13342b, so that the first fixing seat 1332 gradually moves away from the locking member 1334. When the first protrusion 13321 slides to the top of the first protrusion 13343, the first protrusion 13321 reaches the first axial position. The first protrusion 13321 can then continue to rotate in the reverse direction D4 shown in FIG. 19 toward the first recess 13341, thereby allowing the first frame 131 to also rotate to its closed position. At this time, under the elastic restoring force of the elastic member 1335, the locking member 1334 is pressed toward the first axial position closer to the first fixed seat 1332 so that the first protrusion 13321 is at least partially inserted into the first recess 13341, thereby the third pivot joint 133 returns to the locked state. In the examples shown in Figures 19 and 20, two sets of first protrusions 13321, first recesses 13341, second recesses 13342, and first protrusions 13343 are symmetrically distributed on the first fixing seat 133 and the locking member 1334. However, the first fixing seat 133 and the locking member 1334 may also have one set of the above-mentioned first protrusions 13321, first recesses 13341, second recesses 13342, and second protrusions 13343. In the example shown in Figures 19 and 20, the first protrusion 13321 is provided on the first fixing seat 133, and the first recess 13341, the second recess 13342, and the second protrusion 13343 are provided on the locking member 1334. However, the first protrusion 13321 may be provided on the locking member 1334, and the first recess 13341, the first recess 13342, and the second protrusion 13343 may be provided on the first fixing seat 133, and the remaining components may be adjusted accordingly.Furthermore, the first protrusion 13321, the first recess 13341, the second recess 13342, and the second protrusion 13343 can also be disposed between the locking member 1334 and the second fixing seat 1333, and accordingly, the aforementioned components related to the first fixing seat 133 can be adjusted onto the first fixing seat 1333.
[0139] In one embodiment of this application, the collapsible frame 1 may further include a shelf 18 for a user to place items. The shelf 18 may be mounted on the rider 12, for example, between the two handrails of the rider 12, thereby facilitating the user's placement of items. Depending on the type of items to be placed, the shelf 18 may be constructed as a receiving structure with different shapes. For example, in the examples shown in Figures 1 to 4, the shelf 18 may include a cylindrical recess on the left side for placing cups, a vertical recess on the right side for placing a mobile phone, and a semi-circular recess on the right side for placing miscellaneous items such as keys. In the example including the shelf 18, the shelf 18 may remain fixed to the rider 12 in the collapsed state, the extended state, and the state between the collapsed and extended states of the collapsible frame 1, so that it can move with the movement of the rider 12.
[0140] Second Embodiment
[0141] As shown in Figure 21, according to a second embodiment of this application, a collapsible frame A100 is provided, which can be used as a frame for a vehicle. Depending on the usage scenario, the vehicle can be any suitable type of vehicle, such as a stroller, pet stroller, or cargo stroller.
[0142] For ease of description, this application uses the terms "front," "rear," "left," "right," "up," and "down" to indicate relative orientation. These terms should be understood as follows: When the collapsible frame A100 is placed on a working surface (e.g., the ground) and the user pushes the collapsible frame A100, the direction facing the front of the user's body is "front," and the direction facing the back of the user's body is "rear," with "front" and "rear" being opposite. The directions facing the left and right sides of the user's body are "left" and "right," respectively, with "left" and "right" being opposite. "Up" and "down" are defined by their distance from the working surface; a greater distance from the working surface indicates "up," and vice versa. It should be noted that unless otherwise explicitly specified and limited, the orientation terms "front," "rear," "left," "right," "up," and "down" in this document are based on the orientations shown in the accompanying drawings. These directional terms are used only to make the description of the embodiments of the application clearer and are not intended to unduly limit the scope of protection of the application.
[0143] Spatial terms such as "below," "under," "above," and "over" are used herein for descriptive purposes, particularly to describe the positional relationship between one feature or element and another, as shown in the figures. It should be understood that spatial terms are intended to include different orientations of the device in use or operation, in addition to those shown in the figures. For example, if the device in the figure is inverted, a feature or element described herein as "below" other features or elements would be oriented "above" other features or elements. Thus, the exemplary term "below" can include both above and below orientations. The device may also be oriented otherwise (rotated 90 degrees or in other directions), and the spatially related descriptions used herein are interpreted accordingly. Similarly, unless otherwise specifically indicated, the terms "upward," "downward," "vertical," and "horizontal," as used herein, are for illustrative purposes only.
[0144] Referring to Figures 21, 24, and 27, in one embodiment of the foldable frame A100, the foldable frame has a generally symmetrical structure. Specifically, the foldable frame A100 may have a left frame side and a right frame side, which are laterally spaced apart from each other across the width of the foldable frame A100. In embodiments of this application, the left frame side and the right frame side are generally mirror images of each other. This application sometimes describes only one of the left frame side and the right frame side in detail, and may use the singular form to represent various components of one of the left frame side and the right frame side. However, it should be understood that in embodiments of this application, when components of one of the left frame side and the right frame side are described using the singular form, the other of the left frame side and the right frame side includes the same mirrored components.
[0145] The collapsible frame A100 includes a first support leg A121, a second support leg A122, a rider A110, a first frame A130, and a collapsible mechanism A140. The first support leg A121 and the second support leg A122 are pivotally connected to each other. The lower end of the rider A110 is pivotally connected to at least one of the first support leg A121 and the second support leg A122. In particular, in this embodiment, the first support leg A121, the second support leg A122, and the rider A110 are pivotally connected to each other via a first pivot joint A123, thereby being pivotable about the same pivot axis, for example, the first pivot axis AX1 in Figures 23, 26, and 29. In other embodiments, the driver A110 and the first support leg A121 or the first support leg A122, and the first support leg A121 and the second support leg A122 may also be pivotally connected to each other about two different pivot axes.
[0146] The handlebar A110 can be a component for a user to grip to facilitate pushing or pulling the vehicle formed by the collapsible frame A100. In one embodiment of this application, the handlebar A110 has, for example, a U-shaped structure, including two handlebars located on the left and right sides and a crossbar connecting the two handlebars. The bottom ends of the two handlebars can be pivotally connected to the first support leg A121 and / or the second support leg A122. For example, in the example shown in the figure, the bottom ends of the two handlebars are respectively pivotally connected to the tops of the two front members of the first support leg A121 and the tops of the two rear members of the first support leg A122. The tops of the two handlebars are respectively connected to the two ends of the crossbar. The crossbar can be at least partially formed as a handrail 1111 - for a user to grip to push or pull the vehicle formed by the collapsible frame A100.
[0147] The first support leg A121 and the second support leg A122 can be components for mounting wheels to enable the movement of the vehicle formed by the collapsible frame A100. The first support leg A121 can be a front support (serving as a front wheel carrier). Specifically, the first support leg A121 can be, for example, U-shaped, including two front members located on the left and right sides and a front crossbar extending generally in the left-right direction connecting the two front members. In some embodiments, at least one front wheel seat A1211 can be mounted on the bottom of the first support leg A121. For example, two front wheel seats A1211 are respectively mounted on the bottom of the two front members of the first support leg A121. Each front wheel seat A1211 is used to mount a front wheel A191 to enable the movement of the vehicle formed by the collapsible frame A100. The second support leg A122 can be a rear support (serving as a rear wheel carrier). Specifically, the second support leg A122 can include two rear members located on the left and right sides. At least one rear wheel seat A1221 can be mounted on the bottom of the second support leg A122. For example, two rear wheel seats A1221 are respectively mounted on the bottom of the two rear members of the second support leg A122, and each rear wheel seat A1221 is used to mount a rear wheel A192 to make the vehicle formed by the collapsible frame A100 movable. In some other embodiments, the first support leg A121 and the second support leg A122 may also have structures other than those shown in the figures, such as an X-shape, and can be adapted to have several front wheel seats mounted on their bottoms for mounting front wheels, depending on their shape. In some embodiments, referring to Figures 22 and 28, the second support leg A122 may also include a reinforcing rod A1222, which connects between the two rear members and extends in the left-right direction. This improves the structural strength of the second support leg A122, thereby improving the overall structural strength of the collapsible frame A100.
[0148] The collapsible frame A100 has an extended state and a folded state, and can switch between these two states. Referring to FIG30, when the collapsible frame A100 is in the extended state, at least some or all of the components of the collapsible frame A100 can be in their respective extended states and are generally extended relative to each other for use. Referring to FIG31, when the collapsible frame A100 is in the folded state, at least some or all of the components of the collapsible frame A100 can be in their respective folded states and are generally folded relative to each other.
[0149] When the collapsible frame A100 is in the extended position, as shown in Figure 30, the rider A110 and the first support leg A121 (e.g., between the handlebar and the front stalk on the same side) can pivot open to a first angle, which can be approximately 180 degrees. When the frame A100 is in the retracted position, as shown in Figure 32, the rider A110 and the first support leg A121 can pivot close to a second angle. The second angle can be an acute angle smaller than the first angle, for example, it can be an acute angle in the range of 0 to 60 degrees, for example, approximately 25 degrees. When the retractable frame A100 is in the extended state, as shown in Figure 30, the first support leg A121 and the second support leg A122 (e.g., between the front member and the rear member on the same side) can pivot open to a second angle. When the frame A100 is in the retracted state, as shown in Figure 32, the first support leg A121 and the second support leg A122 can pivot close to a fourth angle, which is smaller than the third angle. In the example shown in the figure, the third angle can be a right angle of approximately 90 degrees, an obtuse angle slightly greater than 90 degrees, or an acute angle slightly less than 90 degrees, and the fourth angle can be an acute angle in the range of, for example, but not limited to, 0 to 60 degrees, such as approximately 15 degrees. The fourth angle can be smaller than the second angle mentioned above. In other examples, the above angles can also be set to other suitable values as needed. In the example shown in the figure, in the unfolded state, the retracted state, and the state between the unfolded and retracted states, the second support leg A122 can always be positioned between the first support leg A121 and the rider A110. In other words, the sum of the angle between the first support leg A121 and the second support leg A122 and the angle between the rider A110 and the first support leg A122 can be equal to the angle between the rider A110 and the first support leg A121. Therefore, the setting of the angle between the rider A110 and the second support leg A122 in the unfolded and retracted states can be deduced based on the foregoing description.
[0150] Referring to Figures 22, 25, and 28, the first frame A130 is pivotally connected to the rider A110 and the first support leg A121. Specifically, the first frame A130 is pivotally connected to the rider A110 near the first support leg A121, and also pivotally connected to the first support leg A121 near the first pivot joint A123. The first frame A130 may be a generally rectangular frame, which may generally include two long rods extending in a front-rear direction and two short rods extending in a left-right direction connected to each other. The first frame A130 may be at least partially used to mount or form a support (the general form of the support in this embodiment, such as the arrangement of the first cover, can be similarly seen in the support 30 of the first embodiment), such as a baby carrier, cradle, pet carrier, etc., for carrying infants, pets, or other objects. It should be noted that setting the first frame A130 as a roughly rectangular frame is only one optional implementation of this application. The first frame A130 can also be set as other shapes, such as ellipse, trapezoid, etc. This application does not limit this.
[0151] Referring to Figure 30, when the retractable frame A100 is in the extended state, the first frame A130 is approximately horizontal, with its front and rear ends roughly at the same height vertically. The first frame A130 and the first support leg A121 (e.g., between the rear end of the long rod and the front rod on the same side) can pivotally open to a fifth angle. Referring to Figure 32, when the retractable frame A100 is in the folded state, the first frame A130 rotates to a near-vertical tilted position, causing its front end to rotate upwards to the top and its rear end to rotate downwards to the bottom. The first frame A130 and the first support leg A121 can pivotally close to a sixth angle, which is smaller than the fifth angle. In the example shown in the figure, the fifth angle can be, for example, but not limited to, an obtuse angle in the range of 60-150 degrees, such as approximately 140 degrees, and the sixth angle can be, for example, but not limited to, an acute angle in the range of 0-60 degrees, such as approximately 35 degrees. In other examples, the angles mentioned above can also be set to other suitable values as needed.
[0152] In one embodiment of this application, the collapsible frame A100 may further include a second frame A150 located below the first frame A130. The second frame A150 may also be a generally rectangular enclosure, which may generally include two long rods extending in a front-rear direction and two short rods extending in a left-right direction connected to each other. The first frame A130 and the second frame A150 may respectively form an upper frame and a lower frame, thereby serving together to mount or form a load-bearing portion. For example, the bottom of the load-bearing portion may be placed or formed on the first frame A150, while the sidewall portion of the load-bearing portion may be at least partially placed or formed between the first frame A130 and the first frame A150. The second frame A150 is rotatably connected to a second support leg A122 and / or a first support leg A121. For example, referring to Figures 22 and 28, the second frame A150 is rotatably mounted on the reinforcing rod A1222 in the second support leg A122. Specifically, as shown in Figure 28, the second frame A150 can be rotatably mounted on the reinforcing rod A1222 of the second support leg A122 via a rotating connector A151. The rotating connector A151 includes a sleeve portion A1511 extending in the front-rear direction, which is sleeved on the long rod of the first frame A150. The rotating connector A151 also includes a C-shaped clamping portion A1512 connecting the sleeve portion A1511 to the side, which is movably clamped on the reinforcing rod A1222, so that the second frame A150 can be positioned on the reinforcing rod A1222 and can also rotate around the reinforcing rod A1222. The second frame A150 can rotate about the reinforcing rod A1222 as the axis of rotation. Accordingly, referring to Figures 23 and 29, with the longitudinal axis of the reinforcing rod A1222 as the eighth pivot axis AX8, the second frame A150 can rotate relative to the first support leg A122 about the eighth pivot axis AX8.
[0153] Referring to Figure 30, when the folding frame A100 is in the unfolded state, the second frame A150 is approximately parallel to the first frame A130, and F1 is approximately below the first frame A130, at a first predetermined distance from the first frame A130 (for example, approximately corresponding to the height of the housing body of the support section). Referring to Figure 32, when the folding frame A100 is in the folded state, the first frame A150 can also be approximately parallel to the first frame A130, and at a second predetermined distance from the first frame A130, which is less than the first predetermined distance, so that in the folded state, the second frame A150 approaches the first frame A130. In the example shown in the figures, referring to Figure 32, in the folded state, the second frame A150 approaches the first frame A130 but with a small gap between them. However, for example, in some other examples, when the second pre-foot distance is zero, the second frame A150 can be close to the first frame A130 in the folded state. Generally speaking, in the unfolded or folded state, the second frame A150 is generally parallel to the first frame A130. Correspondingly, when the folded frame A100 is in the unfolded state (see Figure 30), the second frame A150 and the first support leg A121 (e.g., between the rear end of the long rod of the second frame A150 and the front rod on the same side) can also pivot open to the aforementioned fifth angle; when the frame A100 is in the folded state (see Figure 32), the second frame A150 and the first support leg A121 can also pivot close to the aforementioned sixth angle. In other embodiments, the aforementioned angles of the first frame A150 can also be set to other suitable values as needed. For example, the second frame A150 and the first support leg A121 can also be pivoted and retracted to an angle slightly larger or slightly smaller than the aforementioned sixth angle.
[0154] The collapsible frame A100 may further include a support plate A160, which is disposed on the second frame A150. A load-bearing component can be placed on the support plate A160, thereby providing support to the load-bearing component so that it can be more securely placed on the second frame A150 via the support plate A160. During the transition of the collapsible frame A100 from a collapsed state to an extended state or vice versa, the support plate A160 moves with the movement of the second frame A150.
[0155] The retractable frame A100 may also include a roof bracket A170, which is mounted on the first frame A130. In this embodiment, a roof seat A171 is provided on the first frame A130, and the roof bracket A170 is mounted on the first frame A130 through the roof seat A171. The canopy bracket A170 can be used to support and form a canopy (the general shape of the canopy in the wooden embodiment, such as the arrangement of the second cover, can be similarly referred to as the canopy 32 in the first embodiment) to provide light-proofing, mosquito-proofing, and / or wind-proofing for the load-bearing part. Optionally, the canopy bracket A170 is pivotally mounted on the canopy seat A171 so that the canopy bracket A170 can pivot relative to the first frame A130 between an open position and a closed position. When in the closed position, the canopy bracket A170 pivots to the front side close to the first frame A130, and when in the open position, the canopy bracket A170 pivots to the rear side close to the first frame A130, thereby allowing the canopy to be opened to different angles by means of the pivoting of the canopy bracket A170 relative to the first frame A130. In the example including the canopy bracket A170, in the folded state and the unfolded state of the retractable frame A100, In the state between the retracted state and the unfolded state, the canopy support A170 can be in its open position, so that it is generally close to the first frame A130, and thus can move together with the first frame A130.
[0156] As shown in Figures 30 to 32, in one embodiment of the application, the rider A110 may include a first segment A111 located further away from the first support leg A121, and a first segment A112 adjacent to the first support leg A121. The first segment A111 and the second segment A112 may be pivotally connected to each other via a second pivot joint A113, so that the first segment A111 can pivot relative to the second segment A112. For example, the first segment A111 and the second segment A112 may be the rider getting on and the rider getting off, respectively. Specifically, the first section A111 may include a crossbar for forming the handrail portion A1111, and two upper handrails located on the left and right sides connected to both ends of the crossbar. The second section A112 may include two lower handrails located on the left and right sides connected between the bottom ends of the two upper handrails and the top ends of the two front members of the first support leg A111. The two upper handrails can be pivotally connected to the two lower handrails on the same side via two first pivot joints A113. The first section A111 can pivot relative to the second section A112 between an extended position and a retracted position. When the retractable frame A100 is in the extended state, the rider A110 is also in the extended state, and the first section A111 is in the extended position relative to the second section A112. The distance between the first section A111 and the second section A112 (e.g., between the upper handlebar and the lower handlebar on the same side) can pivot to a seventh angle, which can be approximately 180 degrees. When the retractable frame A100 is in the retracted state, the rider A110 is in the retracted state, and the first section A111 is in the retracted position relative to the first section A112. The distance between the first section A111 and the second section A112 can pivot to a eighth angle. The eighth angle can be smaller than the seventh angle, for example, it can be an angle in the range of 0 to 60 degrees, such as approximately 0 degrees, that is, the first section A111 and the second section A112 can be folded and fitted together. In such an embodiment, when it is necessary to fold the collapsible frame A100, before rotating the rider A110 relative to the first support leg A121, the first section A111 in the rider A110 can be rotated relative to the second section A112 until they are folded together, and then the folded rider A110 is rotated relative to the first support leg A121 so that the folding mechanism A140 drives the other parts to fold together, thereby realizing the folding of the collapsible frame A100. In some embodiments, a locking and unlocking mechanism can be provided to prohibit or allow the switching between unfolding and folding of the retractable frame A100, so as to avoid the retractable frame A100 from undesiring folding due to external forces or the like during unfolding use.In one embodiment of the application, the second pivot joint A113 is a locking joint that can switch between an unlocked state that allows rotation of the first segment A111 relative to the second segment A112 and a locked state that prohibits rotation of the first segment A111 relative to the second segment A112. A first locking member A1112 may be provided on the rider A110. In the example shown in the figure, the first locking member A1112 is provided on the handlebar portion A1111 of the first segment A111 to facilitate user operation. However, in other embodiments, the first locking member A1112 may also be provided on other parts of the rider A110, such as on the aforementioned upper or lower handlebar. The second pivot joint A113 can be configured such that when the first unlocking member A112 is not operated and the first section A111 is in the extended position relative to the second section A112, it remains in a locked state; and when the first unlocking member A1112 is operated, it is unlocked and switches to an unlocked state. Furthermore, the aforementioned first pivot joint A123 is also a locking joint, capable of switching between an unlocked state that allows rotation between the first support leg A121, the first support leg A122, and the second section A112, and a locked state that prohibits rotation between the first support leg A121, the second support leg A122, and the second section A112. The first pivot joint A123 can be configured such that when the first section A111 is in the extended position relative to the first section A112, it is locked and remains in a locked state; and when the first section A111 is in the retracted position relative to the second section A112, it is unlocked and switches to a fully unlocked state. Thus, when the retractable frame A100 is in the extended state, when the user operates the first release mechanism A1112, the second pivot joint A113 is released, allowing the first section A111 to be switched from the extended position to the retracted position relative to the second section A112. Subsequently, when the user switches the first section A111 from the extended position to the retracted position relative to the second section A112, the first pivot joint A123 is also released, allowing subsequent operation of the rider A110 to rotate relative to the second support leg A121, thereby causing the first support leg A121, the second support leg A122, and the first section A112 to retract relative to each other via the retraction mechanism A14.
[0157] Referring again to Figures 21, 24, and 27, the folding mechanism A140 is connected to the rider A110, the first support leg A121, the second support leg A122, the first frame A130, and the second frame A150, respectively. When the foldable frame A100 is in the extended state, the rotation of the rider A110 relative to the first support leg A122 drives the folding mechanism A140 to move. The movement of the folding mechanism A140 causes the first frame A130 and the first support leg A121 to rotate, causing the rider A110, the first support leg A121, the second support leg A122, the first frame A130, and the second frame A150 to fold together, thereby switching the foldable frame A100 from the extended state to the folded state. Specifically, with the rear wheel A192 as the fulcrum, during the process of switching the collapsible frame A100 from the extended state to the collapsed state, the rider A110's rotation towards the second support leg A122 drives the collapsing mechanism A140 to move. This, in turn, causes the first support leg A121, the first frame A130, and the second frame A150, all connected to the collapsing mechanism A140, to also retract towards the second support leg A121. Similarly, with the rear wheel A192 as the fulcrum, during the process of switching the collapsible frame A100 from the collapsed state to the extended state, the rider A110's rotation away from the second support leg A122 drives the collapsing mechanism A140 to move. This, in turn, causes the first support leg A121, the first frame A130, and the second frame A150, all connected to the collapsible mechanism A140, to also extend away from the second support leg A121. Thus, the retraction mechanism A140 can be used to drive the various components connected to it, including the rider A110, the first support leg A121, the second support leg A122, the first frame A130, and the first frame A150, to retract or unfold relative to each other.
[0158] Referring to Figures 22, 25 and 28, the retraction mechanism A140 includes a fifth connector A145, through which the first frame A130 is pivotally connected to the rider A110, and in particular, to the second section A112 of the rider A110. In this embodiment, the first frame A130 is fixed to the second connector A145, and the second connector A145 is pivotally connected to the second section A112. In an embodiment where the retractable frame A100 is provided with a roof bracket A170, the fifth connector A145 can be fixed to the roof seat A17K mounted on the first frame A130 for mounting the roof bracket A170. The retractable mechanism A140 also includes a sixth connector A146, the first end of which is pivotally connected to the first frame A130, and the second end of which is pivotally connected to the first support leg A12K. Referring to Figures 23, 26, and 29, the fifth connector A145 and the second section A112 are pivotally connected to each other around the ninth pivot axis AX9, and the sixth connector A146 and the first frame A130 are pivotally connected to each other around the ninth pivot axis AX10. The first support leg A121 is pivotally connected to the second support leg A122 around the fifth pivot axis AX5. The ninth pivot axis AX9, the tenth pivot axis AX10, and the fifth pivot axis AX5 are located at different positions in the front-rear and vertical planes, and do not coincide with each other. The tenth pivot axis AX10 and the fifth pivot axis AX5 pass through two different points on the sixth connector A146. Through the fifth connector A145 and the sixth connector A146, the pivoting of the rider A110 relative to the second support leg A122 can drive the first frame A130 to move together. Thus, during the process of the rider A110, the second support leg A121, and the second support leg A122 retracting or unfolding relative to each other through the retraction mechanism A140, the first frame A130 also retracts or unfolds synchronously through the retraction mechanism A140.
[0159] Referring again to Figures 22, 25, and 28, the retracting mechanism A140 further includes a first connector A141, a second connector A142, and a third connector A143. The first end of the first connector A141 is pivotally connected to the rider A110, specifically to the second section A112 of the rider A110. The second end of the first connector A141 is pivotally connected to the second connector A142 and the third connector A143. The first connector A142 is pivotally connected to the first support leg A122 and has a first end pivotally connected to the second connector A141. The first end of the third connector A143 is pivotally connected to the first support leg A121, specifically, the first end of the third connector A143 is pivotally connected to the first support leg A121 about the same pivot axis as the sixth connector A146. The second end of the third connector A143 is pivotally connected to the first connector A141. Specifically, the second end of the third connector A143 is pivotally connected to the first connector A141 about the same pivot axis as the second connector A142. Thus, with the rear wheel A192 as the fulcrum, the pivoting of the rider A110 relative to the second support leg A122 can drive the movement of the first connector A141. Since the first connector A141 is connected to the second support leg A122 via the second connector A142 and to the first support leg A121 via the second connector A143, the movement of the first connector A141 and the pivoting of the first connector A142 relative to the first support leg A122 will cause the first support leg A121 to pivot relative to the second support leg A122, for example, causing the first support leg A121 to retract toward or extend away from the second support leg A122.
[0160] Referring to Figures 23, 26, and 29, the first connector A141 and the second segment A112 of the driver A110 are pivotally connected to each other around the second pivot axis AX2. The first connector A141, the second connector A142, and the third connector A143 are pivotally connected to each other around the third pivot axis AX3. The first connector A142 and the first support leg A122 are pivotally connected to each other around the fourth pivot axis AX4. The third connector A143, the sixth connector A146, and the first support leg A121 are pivotally connected to each other around the fifth pivot axis AX5. The second pivot axis AX2 and the first pivot axis AX3 pass through two different points on the first connector A141. The third pivot axis AX3 and the fourth pivot axis AX4 are located at two different points on the second connector A142, and the third pivot axis AX3 and the fifth pivot axis AX5 are located at two different points on the third connector A143. The second pivot axis AX2, the third pivot axis AX3, the fourth pivot axis AX4, and the fifth pivot axis AX5, along with the previously described first pivot axis AX1, eighth pivot axis AX8, ninth pivot axis AX9, tenth pivot axis AX10, and fifth pivot axis AX5, are distributed at different positions in the planes of the front-back and vertical directions, and do not coincide with each other. For example, each connector may generally have a sheet-like structure extending in the planes of the front-back and vertical directions.
[0161] The closing mechanism A140 can also be connected to the second frame A150. Specifically, the closing mechanism A140 further includes a fourth connector A144. The second connector A142 has a second end pivotally connected to the fourth connector A144. In this embodiment, the second connector A142 is, for example, L-shaped, with its middle portion pivotally connected to the second support leg A122, and its two ends extending from the middle portion pivotally connected to the first connector A141 and the fourth connector A144, respectively. In other embodiments, the second connector A142 can be arc-shaped, triangular, or any other suitable shape. The first end of the fourth connector A144 is pivotally connected to the first end of the first connector A142, and the first end of the fourth connector A144 is pivotally connected to the second frame A150.
[0162] The second connector A142 and the fourth connector A144 are pivotally connected to each other around the sixth pivot axis AX6. The fourth connector A144 and the second frame A150 are pivotally connected to each other around the seventh pivot axis AX7. The sixth pivot axis AX6 and the seventh pivot axis AX7, along with the previously described ninth pivot axis AX9 to fourth pivot axis AX4, are also located at different positions in the front-back and up-down directions, and do not coincide with each other. The third pivot axis AX3, the fourth pivot axis AX4, and the sixth pivot axis AX6 pass through three different points on the second connector A142, and these three points are not collinear, forming a triangle. The sixth pivot axis AX6 and the seventh pivot axis AX7 pass through two different points on the fourth connector A144. When the movement of the first connecting member A141 causes the second connecting member A142 to pivot around the fourth pivot axis AX4, the second connecting member A142 drives the fourth connecting member A144 to move, which in turn drives the second frame A150 to move together. Specifically, under the drive of the fourth connecting member A144, the second frame A150 rotates around the eighth pivot axis AX8 relative to the first support leg A122. Thus, with the rear wheel A192 as the fulcrum, the rider A110 pivots relative to the second support leg A122, causing the retraction mechanism A140 to drive the first support leg A121 to retract toward or extend away from the second support leg A122. Simultaneously, the second frame A150 also retracts or extends synchronously under the drive of the retraction mechanism A140.
[0163] The folding and unfolding process of the collapsible frame A100 in the embodiment is described below with reference to Figures 30 to 32. In Figures 30 to 32, the folding mechanism A140 in each collapsible frame A100 is also shown below to more clearly show the relative positions of the various connecting parts in the folding mechanism A140. The approximate position of the second support leg A122 is indicated by a dashed line P1, the approximate position of the first frame A130 is indicated by a dashed line P2, and the approximate position of the second frame A150 is indicated by a dashed line P3.
[0164] As shown in Figure 30, the retractable frame A100 is in the extended state, at which time all components of the retractable frame A100 are in the extended state relative to each other. The first pivot joint A123 and the second pivot joint A113 are both in the locked state. When it is necessary to retract the retractable frame A100, the user operates the first release mechanism A1112 to release the second pivot joint A113, thereby allowing the first section A111 to pivot relative to the second section A112. In this case, the user drives the first section A111 to pivot relative to the second section A112 by reducing the angle between the first section A111 and the second section A112, for example, by pushing the first section A111 forward and then downward, causing the first section A111 to pivot relative to the first section A112 in a counterclockwise direction D2 as shown in Figure 30. When segment A111 pivots relative to segment A112 to a retracted position, for example, when segment 111 is in contact with segment 112, the first pivot joint A123 is released, thereby allowing pivoting between the first support leg A121, the second support leg A122, and segment 112. In this case, the user drives the rider A110 to pivot relative to the second support leg A122 by reducing the angle between the rider A110 and the second support leg A122. For example, using the rear wheel A192 as a fulcrum, the user presses the rider A110 downward and then forward, causing the rider A110 to pivot relative to the second support leg A122 in a clockwise direction D1 as shown in Figure 31, thereby bringing the rider A110 and the first support leg A122 together. As shown in Figures 22, 25, 28, and 31, when rider A110 pivots clockwise around the first pivot axis AX1 in a direction D1 relative to the second support leg A122, the fifth connector A145 pivotally connected to rider A110 moves with rider A110. This causes the first frame A130, fixed to the fifth connector A145, to rotate clockwise in a direction D1, causing the rear of the second frame A130 to converge toward the first support leg A122. Furthermore, the clockwise pivoting of rider A110 relative to the first support leg A122 around the first pivot axis AX1 in a direction D1 drives the first connector A141 downward and then forward, generally moving towards the second support leg A122.Referring to Figures 23, 26, and 29, the downward and forward movement of the first connecting member A141 causes the second connecting member A142 to pivot counterclockwise around the fourth pivot axis AX4 in a direction D2, and causes the third connecting member A143 to pivot clockwise around the fifth pivot axis AX5 in a direction D1. Simultaneously, the third connecting member A143 moves closer to the second connecting member A142, reducing the distance between the fifth pivot axis AX5 and the fourth pivot axis AX4 in the front-back direction, causing the first support leg A121 to converge towards the second support leg A122. Furthermore, the pivoting of the first connecting member A142 around the fourth pivot axis AX4 in a counterclockwise direction D2 will drive the fourth connecting member A144 to move backward and rotate towards the first support leg A122, reducing the distance between the seventh pivot axis AX7 and the fourth pivot axis AX4 in the front-back direction. Driven by the fourth connector A144, the second frame A150 rotates clockwise D1 around the eighth pivot axis AX8, causing the front of the second frame A150 to retract toward the second support leg A122. Since the first frame A130 and the second frame A150 retract toward the first support leg A122 on opposite sides of the first support leg A122, driven by the platform retraction mechanism A140, the second frame A130 and the first frame A150 also retract toward each other. As shown in 32, as the rider A110 pivots relative to the first support leg A122 and retracts to the retracted state, the first support leg A121, the first frame A130, and the second frame A150 pivot relative to the second support leg A122 and retract to the retracted state, thereby switching the retractable frame A100 to the retracted state.
[0165] As shown in Figure 32, the collapsible frame A100 is in the collapsed state, at which time all components of the collapsible frame A100 are collapsed relative to each other. The second pivot joint A113 and the first pivot joint A123 are both in the unlocked state. When it is necessary to unfold the collapsible frame A100, the user drives the rider A110 to pivot relative to the second support leg A122 by increasing the angle between the rider A110 and the second support leg A122. For example, using the rear wheel A192 as a fulcrum, the user lifts the rider A110 backward and then upward, causing the rider A110 to pivot relative to the first support leg A122 in a counterclockwise direction D2 as shown in Figure 32, thereby unfolding the rider A110 and the second support leg A122 relative to each other. As shown in Figures 22, 25, 28, and 31, when rider A110 pivots clockwise around the first pivot axis AX1 with respect to the second support leg A122, the fifth connector A145 pivotally connected to rider A110 moves with rider A110. This causes the first frame A130, fixed to the fifth connector A145, to rotate counterclockwise around the first pivot axis AX1, causing the rear of the first frame A130 to unfold away from the second support leg A122. Furthermore, the counterclockwise pivoting of rider A110 with respect to the second support leg A122 around the first pivot axis AX1 with respect to the second support leg A122 drives the first connector A141 to move backward and then upward, generally in a direction away from the second support leg A122. Referring to Figures 23, 26, and 29, the backward and upward movement of the first connecting member A141 causes the second connecting member A142 to pivot clockwise around the fourth pivot axis AX4 in the direction D1, and causes the third connecting member A143 to pivot counterclockwise around the fifth pivot axis AX5 in the direction D2. Simultaneously, the third connecting member A143 unfolds away from the first connecting member A142, increasing the distance between the fifth pivot axis AX5 and the fourth pivot axis AX4 in the front-back direction, and causing the first support WA121 to unfold away from the second support foot A122. Furthermore, the pivoting of the second connecting member A142 around the fourth pivot axis AX4 in the clockwise direction D1 drives the fourth connecting member A144 to move forward and rotate away from the second support foot A122, increasing the distance between the seventh pivot axis AX7 and the fourth pivot axis AX4 in the front-back direction. Driven by the fourth connector A144, the second frame A150 rotates counterclockwise D2 around the eighth pivot axis AX8, causing the front of the second frame A150 to unfold away from the second support leg A122.Driven by the retraction mechanism A140, the first frame A130 and the second frame A150 unfold away from the first support leg A122 on opposite sides of the second support leg A122. Therefore, the first frame A130 and the first frame A150 also unfold away from each other. As the rider A110 pivots relative to the second support leg A122 and unfolds to the unfolded state, the first support leg A121, the first frame A130, and the second frame A150 pivot relative to the second support leg A122 and unfold to the unfolded state. In this situation, the user drives the first segment A111 to pivot relative to the second segment A112 by increasing the angle between the first segment A111 and the second segment A112, for example, by pulling the first segment A111 upwards and then backwards, causing the first segment A111 to pivot relative to the first segment A112 in a clockwise direction D1 as shown in Figure 30. When the first segment A111 pivots relative to the second segment A112 to the unfolded position, for example, when the first segment A111 and the second segment A112 are approximately 180 degrees apart, the first pivot joint A123 returns to its locked position, and the second pivot joint A113 also returns to its locked position. Thus, as shown in Figure 30, the retractable frame A100 can be switched to the unfolded state.
[0166] Referring to Figures 21 and 24, in one embodiment of this application, the first frame A130 includes a first frame A131, a second frame A132, and a third frame A133. The first frame A131 and the third frame A134 may be U-shaped, and the second frame A132 may include two rods and be located between the first frame A131 and the third frame A134. The first frame A131, the second frame A132, and the second frame A134 are interconnected to form a frame. The first frame can be referred to as the "front frame," the second frame as the "middle frame," and the third frame as the "rear frame." Referring to Figures 22, 25, and 28, the second frame A132 is pivotally connected to the first section A112 of the rider A110 via the fifth connector A145. The sixth connector A146 is also pivotally connected to the second frame A132, but at a different position from the fifth connector A145. Specifically, the fifth connector A145 is fixed to the rear end of the second frame A132, and the sixth connector A146 is pivotally connected to the front end of the second frame A132. In an embodiment where the retractable frame A100 is provided with a canopy bracket A170, the canopy seat A171 for mounting the canopy bracket A170... The fifth connector A145 is fixed to the canopy seat A171 and is located at the rear end of the second frame A132.
[0167] The front end of the second frame A132 is pivotally connected to the first frame A131 via the third pivot joint A134, and the rear end of the first frame A132 is pivotally connected to the second frame A132 via the fourth pivot joint A135. The first frame A131 and the first frame A133 are pivotable relative to the second frame A132 between a closed position and an open position via the third pivot joint A134 and the fourth pivot joint A135, respectively. When the first frame A131 is in the closed position, the first frame A131 is generally parallel to the first frame A132, and in particular, is located in the same plane as the first frame A132. When the second frame A131 is in the open position, the first frame A131 is inclined relative to the second frame A132 toward the first support A121. When the third frame A133 is in the closed position, the third frame A133 is generally parallel to the second frame A132, and in particular, it is located in the same plane as the second frame A132. When the third frame A133 is in the open position, the third frame A133 is inclined relative to the second frame A132 toward the second support leg A122, as shown in Figure 33.
[0168] According to one embodiment of this application, both the third pivot joint A134 and the fourth pivot joint A135 may include a release member, and both the second pivot joint A134 and the fourth pivot joint A135 may be configured such that: when the first frame A131 or the third frame A133 is in the open position, the first frame A131 or the third frame A133 may be switched from the open position to the closed position when the release member is not operated; when the first frame A131 or the third frame A133 is in the closed position, the first frame A131 or the third frame A133 may not be switched from the closed position to the open position when the release member is not operated, and when the release member is operated, the first frame A131 or the third frame A133 may be switched from the closed position to the open position. The specific configuration of each unlocking member at the third pivot joint A134 and the fourth pivot joint A135 in this embodiment can be referred to the configuration of the first unlocking member 1331 at the third pivot joint 133 in the aforementioned embodiment, and will not be repeated here.
[0169] Specifically, for example, referring to Figure 32, when the collapsible frame A100 is folded, the first frame A131 can pivot relative to the second frame A132 toward the first support leg A121 to the open position, thereby making the folded frame A100 have the most compact overall volume possible. As another example, referring to Figure 33, when the third frame A133 is in the open position, the rear sidewall of the support portion of the first frame A130 can be partially opened downwards to form an opening, allowing a pet to easily cross over the downwardly opening opening from the rear of the support portion to enter and exit the storage space of the support portion. It can be understood that the first frame A131 can also be configured such that, when in the open position, the front sidewall of the support portion can be partially opened downwards to form an opening, allowing a pet to easily cross over the downwardly opening opening from the front of the support portion to enter and exit the storage space of the support portion.
[0170] Referring to Figure 21, and in conjunction with Figures 33 and 34, the foldable frame A100 also includes a movable plate A180, which is slidable relative to the support plate A160 between a stowed position and a use position. When the movable plate A180 is in the stowed position, the entire movable plate A180 is positioned above the support plate A160, as shown in Figures 21 and 33. When the movable plate A180 is in the use position, one end of the movable plate A180 is located on top of the support plate A160, and the other end of the movable plate A180 extends out from the support plate A160. The other end of the movable plate A180 extending from the support plate A160 can rest on, for example, the plane where the retractable frame A100 is located, or other planes, thereby facilitating the pet's entry into or exit from the carrying space of the support portion to reach that plane. In the embodiments shown in Figures 33 and 34, the movable plate A180 is positioned above the support plate A160. It can be understood that in some other embodiments, the movable plate A180 may be positioned below the support plate A160. Figure 35 shows an embodiment where the movable plate A180 is positioned below the support plate A160. Compared to the embodiments shown in Figures 33 and 34, the movable plate A180 can be pulled out from below the support plate A160. As shown in Figure 35, when the movable plate A180 is in the use position, one end of the movable plate A180 is located at the bottom of the support plate A160. The other end extends from the support plate A160. When the movable plate A180 is in the retracted position, the movable plate A180 is located entirely at the bottom of the support plate A160.
[0171] Returning to Figures 33 and 34, in one embodiment of this application, the support plate A160 is provided with guide rails A161, and the movable plate A180 is provided with connecting portions A18K that slide with the guide rails A161. Through the sliding engagement of the connecting portions A181 with the guide rails A161, the movable plate A180 can slide relative to the support plate A160 between a storage position and a use position. As shown in Figure 34, in this embodiment, the support plate A160 is provided with two guide rails A161 extending in the front-rear direction, and two connecting portions A181 are provided at the front end of the movable plate A180. The two connecting portions A181 slide with the two guide rails A161 respectively, so that the movable plate A180 is retractable relative to the support plate A160 from the rear of the support plate A160. It is understood that in other embodiments, one or more guide rails A161 may be provided, and connecting portions A181 matching the number of guide rails A161 may be provided. The number of guide rails A161 and connecting portions A181 is not limited here. It is also understood that the number of connecting portions A181 may not match the number of guide rails A161; for example, one connecting portion A181 may slide with two guide rails A161. Furthermore, although in this embodiment the movable plate A180 is configured to be retractable relative to the support plate A160 from the rear, in other embodiments the movable plate A180 may also be configured to be retractable relative to the support plate A160 from the front. In this case, the connecting portions A181 may be provided, for example, at the rear end of the movable plate A180. In the embodiments shown in Figures 33 and 34, the guide rail A161 is disposed above the support plate A160. It can be understood that in the embodiment where the movable plate A180 is disposed below the support plate A160, the guide rail A161 can be disposed accordingly below the support plate A160. The connecting part A181 of the movable plate A180 can be slidably engaged with the guide rail A161 in a similar manner, which will not be described in detail here.
[0172] In one embodiment of the material, the support plate A160 may be fitted with a fabric cover. After the fabric cover is fitted, the support plate A160 is fixed to the first frame A150. The guide rail A161 may be a webbing, and the front and rear ends of the guide rail A161 are fixed to the surface of the fabric cover covering the top surface of the support plate A160 by sewing. The connecting part A181 may be, for example, a buckle, and the guide rail A161 passes through the connecting part A181 to slidably connect the movable plate A180 to the support plate A160. It is understood that the guide rail A161 and the connecting part A181 may be made of any suitable components known in the art, as long as a sliding fit between the guide rail A161 and the connecting part A181 can be achieved, and this application does not impose any limitations on this.
[0173] According to the above embodiment, when the retractable frame A100 is in the state shown in FIG. 24, to facilitate the pet's entry and exit from the carrying unit, the fourth pivot joint A135 can be released to allow the third frame A133 to pivot relative to the first frame A132. Then, the first frame A133 is pivoted from the closed position to the open position, as shown in FIG. 33. At this time, a rearward opening is formed at the rear of the retractable frame A100, providing access to the carrying unit. Next, the movable plate A180 is pulled out from the rear of the retractable frame A100 through the rearward opening until the movable plate A180 is in the resting position, as shown in FIG. 34. The pet can enter and exit the carrying unit through the movable plate A180 and through the rearward opening. In other embodiments, the first frame A131 and the movable plate A180 may be configured to facilitate pet access to and from the carrier from the front of the collapsible frame A100 in a similar manner, which will not be described in detail here.
[0174] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.
[0175] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
Claims 1. A retractable frame, capable of switching between an extended state and a retracted state, characterized in that, include: The first and second support legs are pivotally connected to each other; The rider, the lower end of which is pivotally connected to the first support leg and / or the second support leg; The first frame, the first frame being pivotally connected to the first support leg; and A retractable mechanism, which is connected to the rider, the first support leg, the second support leg, and the first frame respectively; When the retractable frame is in the unfolded state, the rotation of the rider relative to the second support leg drives the retraction mechanism to move. The retraction mechanism drives the first support leg and the first frame to rotate, thereby causing the rider, the first support leg, the second support leg, and the first frame to retract into each other, and the retractable frame switches from the unfolded state to the retracted state.
2. The collapsible frame according to claim 1, characterized in that, The closing mechanism includes: A first connector, which is connected to the driver; A second connector, which is connected to the second support leg and is pivotally connected to the first connector; and a third connector, which is connected to the first support leg and is pivotally connected to the first connector.
3. The collapsible frame according to claim 2, characterized in that, The first connector and the rider are pivotally connected to each other about a first pivot axis; and / or The second connector and the second support leg are pivotally connected to each other about the fourth pivot axis.
4. The collapsible frame according to claim 2, characterized in that, The first connector, the second connector, and the third connector are pivotally connected to each other about a third pivot axis.
5. The collapsible frame according to claim 2, characterized in that, The third connector and the first support leg are pivotally connected to each other about the fifth pivot axis.
6. The collapsible frame according to claim 2, characterized in that, The second connector is connected to the first frame at the first connection point.
7. The collapsible frame according to claim 5, characterized in that, The first frame and the first support leg are pivotally connected to each other about the fifth pivot axis.
8. The collapsible frame according to claim 2, characterized in that, It also includes a second frame located below the first frame, and the second frame is rotatably mounted to the second support leg.
9. The collapsible frame according to claim 8, characterized in that, The closing mechanism further includes a fourth connector, which is pivotally connected to the second connector about a sixth pivot axis, and the fourth connector is pivotally connected to the first frame about a seventh pivot axis.
10. The collapsible frame according to any one of claims 1 to 9, characterized in that, The first frame includes a first frame and a second frame, wherein the second frame is pivotally connected to the first support leg. The first frame is pivotally connected to the second frame, such that the first frame can pivot relative to the second frame between a closed position and an open position.
11. The collapsible frame according to claim 1, characterized in that, The first frame is also pivotally connected to the driver.
12. The collapsible frame according to claim 11, characterized in that, The retraction mechanism includes a fifth connector and a sixth connector. The first frame is fixed to the fifth connector, the fifth connector is pivotally connected to the rider, the first end of the sixth connector is pivotally connected to the first frame, and the second end of the sixth connector is pivotally connected to the first support.
13. The collapsible frame according to claim 12, characterized in that: The closing mechanism further includes a first connector, a second connector, and a third connector; The first end of the first connector is pivotally connected to the driver, and the second end of the first connector is pivotally connected to the second connector and the third connector; The second connector is pivotally connected to the second support leg and has a first end TT that is pivotally connected to the first connector; the first end of the third connector is pivotally connected to the first support leg and the second end of the third connector is pivotally connected to the first connector.
14. The collapsible frame according to claim 13, characterized in that: The first end of the [ ] connector is pivotally connected to the first support leg about the same pivot axis as the sixth connector; The first end of the third connector is pivotally connected to the second connector about the same pivot axis.
15. The collapsible frame according to claim 13, characterized in that, The collapsible frame also includes a second frame located below the first frame and rotatably connected to the second support leg.
16. The collapsible frame according to claim 15, characterized in that, The folding structure further includes a fourth connector, the first end of which is pivotally connected to the second end of the first connector, and the second end of which is pivotally connected to the second frame.
17. The collapsible frame according to claim 16, characterized in that, The second connector is L-shaped, with its middle portion pivotally connected to the second support leg, and its two ends extending from the middle portion pivotally connected to the first connector and the fourth connector, respectively.
18. The collapsible frame according to claim 8 or 15, characterized in that, The collapsible frame also includes a support plate, which is disposed on the second frame.
19. The collapsible frame according to claim 18, characterized in that, The collapsible frame also includes a movable plate that is slidable relative to the support plate between a storage position and a use position. When the movable plate is in the storage position, the entire movable plate is located above or below the support plate; when the movable plate is in the use position, one end of the movable plate is located at the top or bottom of the support plate, and the other end of the movable plate extends out from the support plate.
20. The collapsible frame according to claim 11, characterized in that: The first frame includes a first frame, a second frame, and a third frame; The second frame is pivotally connected to the driver; The first frame is pivotally connected to the second frame so that the first frame can pivot relative to the second frame between a closed position and an open position; The third frame is pivotally connected to the second frame such that the third frame can pivot relative to the second frame between a closed position and an open position.