Foldable frame and wheelchair

Abstract

The application relates to the field of travel tools, and provides a foldable frame and a wheelchair. The foldable frame comprises a first frame mechanism, a second frame mechanism and a handle mechanism. The first frame mechanism is provided with a bearing position for bearing a target object, and comprises a first frame assembly and a second frame assembly which can rotate relative to each other, so that the frame has an unfolded use state and a folded storage state. The second frame mechanism is connected with the first frame mechanism through a locking assembly, the locking assembly has a matching structure of a positioning groove and a positioning pin, can be automatically locked at the unfolded or folded position under the action of an elastic component, and can be released by one key through an unlocking component. The handle mechanism is foldably connected to the second frame mechanism through a structural connecting assembly. The application realizes quick and safe switching of the equipment between the stable use and the compact storage state through the setting of the multi-component linkage folding and the reliable locking mechanism, and effectively solves the problems of complex operation and large storage volume of the traditional folding structure.

Description

Technical Field

[0001] This application relates to the field of transportation tools, and more particularly to a foldable vehicle frame and wheelchair. Background Technology

[0002] As an important means of transportation for people with mobility impairments, the portability of wheelchairs has always been a focus of design. Currently, various foldable wheelchairs exist on the market, reducing their size through folding structures for easier transport and storage. However, common foldable wheelchairs typically only involve the main frame, resulting in an overall size that is still not compact enough after folding, leading to inefficient space utilization. Utility Model Content

[0003] This application provides a foldable frame to address the problem of unsatisfactory space utilization when the main body of the wheelchair frame is folded.

[0004] In a first aspect, this application provides a foldable frame, comprising: The first frame mechanism is provided with a bearing position for carrying the target object. The first frame mechanism includes a first frame assembly and a second frame assembly that can rotate relative to each other, so that the first frame mechanism has a switchable first state and a second state. The second frame mechanism is equipped with a locking assembly. The second frame mechanism is connected to the first frame mechanism through the locking assembly. The locking assembly has a switchable locked state and an unlocked state. In the locked state, the second frame mechanism is fixedly connected to the first frame mechanism through the locking assembly. In the unlocked state, the second frame mechanism is rotatably connected to the first frame mechanism. The handrail mechanism is provided with a support position for providing support to the target object, and the handrail mechanism is connected to the second frame mechanism and can be folded relative to the second frame mechanism.

[0005] In some embodiments, the armrest mechanism has switchable third and fourth states, wherein in the third state, the support position can be used to provide support for the target object, and in the fourth state, the armrest mechanism can rotate relative to the second frame mechanism to fold relative to the second frame mechanism.

[0006] In some embodiments, the handrail mechanism includes a handrail assembly and a structural connection assembly, the structural connection assembly including a first connection portion and a second connection portion, one of the first connection portion and the second connection portion being disposed in the handrail mechanism, and the other of the first connection portion and the second connection portion being disposed in the second frame mechanism; The first connecting part and the second connecting part can be adapted to form a structural engagement or structural lock to lock the handrail mechanism in the third state and fix it to the second frame mechanism; and the second connecting part and the first connecting part can disengage from the structural engagement or structural lock under the action of external force to switch the handrail mechanism to the fourth state.

[0007] In some embodiments, the structural connection assembly is provided with a triggering component, which is disposed on the first frame mechanism and / or the second frame mechanism and connected to the first connecting portion; The triggering component, when triggered by an external force, can cause the second connecting part to disengage from or lock with the first connecting part in the structure.

[0008] In some embodiments, the second frame mechanism connection and / or the handrail mechanism are further provided with a limiting structure; When the handrail mechanism is in the fourth state, the limiting structure can abut against the handrail assembly and limit the handrail assembly.

[0009] In some embodiments, the locking assembly includes at least a positioning component and an elastic component; The positioning component includes a first positioning element and a positioning pin. The first positioning element is connected to the first frame assembly and is provided with a first positioning groove and a second positioning groove. The positioning pin is fixed to the second frame assembly. The elastic component is used to apply an elastic force to the first positioning member or the positioning pin, so that the positioning pin is inserted into the first positioning groove or the second positioning groove. Specifically, when the first frame mechanism is in the first state, the positioning pin is engaged in the first positioning groove under the action of the elastic component; when the first frame mechanism is in the second state, the positioning pin is engaged in the second positioning groove under the action of the elastic component.

[0010] In some embodiments, the locking assembly further includes an unlocking component configured to overcome the elastic force of the elastic component under the action of an external force, thereby disengaging the locating pin from the first locating groove or the second locating groove.

[0011] In some embodiments, the unlocking component includes an unlocking pedal and an unlocking transmission member; the unlocking pedal is rotatably connected to the first frame assembly or the second frame assembly; the unlocking transmission member is connected between the unlocking pedal and the locating pin, for converting the rotational motion of the unlocking pedal into the linear displacement of the locating pin; When the unlocking pedal is rotated, the unlocking transmission component drives the positioning pin to move in the direction of disengaging from the first positioning groove or the second positioning groove, so as to realize the switching of the locking assembly between the locking state and the unlocking state.

[0012] In some embodiments, the first frame assembly and the second frame assembly are connected by at least one set of cross linkage mechanisms, the two ends of which are hinged to the first frame assembly and the second frame assembly, respectively. The rotation of the cross linkage mechanisms drives the first frame assembly and the second frame assembly to switch between the first state and the second state.

[0013] In some embodiments, the cross linkage mechanism includes a first support rod and a second support rod, one end of the first support rod being hinged to the first frame assembly and the other end of the first support rod being hinged to the second support rod; one end of the second support rod being hinged to the second frame assembly and the other end of the second support rod being hinged to the first support rod, the first support rod and the second support rod being hinged to each other at the intersection to form a rotation center.

[0014] In some embodiments, the first frame assembly is provided with the bearing position and the first frame assembly is provided with a first connecting portion for connecting a first wheelset, wherein, in the first state, the bearing position can be used to bear the target object, and in the second state, the second frame assembly covers at least a portion of the bearing position; And / or, the second frame assembly includes a backrest assembly, wherein, in the first state, the backrest assembly is available to provide back support for the target object, and in the second state, the backrest assembly covers at least a portion of the load-bearing position; And / or, the second frame assembly further includes a second connection portion for connecting a second wheelset.

[0015] Secondly, this application also provides a wheelchair, including: a foldable frame as described above, a first wheel set disposed at a first connecting portion, and a second wheel set disposed at a second connecting portion.

[0016] The foldable frame of this application achieves a quick and safe switch between stable use and compact storage by setting up a multi-component linkage folding and reliable locking mechanism.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the disclosure of the embodiments of this application. Attached Figure Description

[0018] 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.

[0019] Figure 1 A modular structural block diagram of a foldable vehicle frame provided in an embodiment of this application; Figure 2 This is a structural schematic diagram of a foldable frame in its unfolded state, provided as an embodiment of this application. Figure 3 This is a structural schematic diagram of a foldable frame in its unfolded state, provided as an embodiment of this application. Figure 4 This is a schematic diagram of a foldable frame in a folded state, provided in an embodiment of this application. Figure 5 This is a schematic diagram of the structure of the locking assembly provided in the embodiments of this application; Figure 6 This is a schematic diagram of the structural connection component provided in the embodiments of this application; Figure 7 This is a structural schematic diagram of an electric wheelchair in its unfolded state, provided as another embodiment of this application. Figure 8 A left view of an electric wheelchair in its unfolded state, provided in another embodiment of this application; Figure 9 A left view of an electric wheelchair in a folded state, provided for another embodiment of this application.

[0020] Figure label: 1. Foldable frame; 10. First frame mechanism; 11. First frame assembly; 12. Second frame assembly; 101. First connecting part; 20. Second frame mechanism; 21. Locking assembly; 201. Second connecting part; 211. Positioning component; 212. Elastic component; 30. Handrail mechanism; 31. Handrail assembly; 32. Structural connection assembly; 321. First connecting part; 322. Second connecting part; 323. Triggering component; 1000, Electric wheelchair; 100, First wheel group; 200, Second wheel group. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. The term “and / or” as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0023] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0024] Please see Figure 1 , Figure 1 This is a block diagram of a modular structure of a foldable frame 1 provided in an embodiment of this application.

[0025] like Figure 1 As shown, this application provides a foldable bicycle frame 1, wherein the foldable bicycle frame 1 includes a first frame mechanism 10, a second frame mechanism 20, and a handrail mechanism 30. The specific structure of each component of the foldable bicycle frame 1 and their mutual cooperation will be described in detail below.

[0026] Specifically, such as Figures 2 to 6As shown, the first frame mechanism 10 is provided with a support position for carrying the target object. The first frame mechanism 10 includes a first frame assembly 11 and a second frame assembly 12 that can rotate relative to each other, so that the first frame mechanism 10 has a switchable first state and a second state. The second frame mechanism 20 is provided with a locking assembly 21. The second frame mechanism 20 is connected to the first frame mechanism 10 through the locking assembly 21. The locking assembly 21 has a switchable locked state and an unlocked state. In the locked state, the second frame mechanism 20 is fixedly connected to the first frame mechanism 10 through the locking assembly 21. In the unlocked state, the second frame mechanism 20 is rotatably connected to the first frame mechanism 10. The armrest mechanism 30 is provided with a support position for providing support for the target object. The armrest mechanism 30 is connected to the second frame mechanism 20 and can be folded relative to the second frame mechanism.

[0027] Optionally, the armrest mechanism 30 has a switchable third state and a fourth state. Under the action of external force, the armrest mechanism 30 can switch between the third state and the fourth state. In the third state, the support position can be used to provide support for the target object. In the fourth state, the armrest mechanism 30 rotates relative to the second frame mechanism 20 and folds relative to the second frame mechanism 20, thereby realizing the miniaturization of the second frame mechanism 20 and facilitating the storage of the second frame mechanism 20.

[0028] More specifically, the "first state," "second state," "third state," and "fourth state" refer to several stable configurations of the key components of the foldable frame 1 in terms of form and function. The "first state" refers to the first frame mechanism 10 being fully extended, with its load-bearing position in a horizontal or suitable load-bearing posture, allowing the user to sit safely; at this time, the entire foldable frame 1 is in a usable working configuration. The "second state" refers to the first frame mechanism 10 being folded, with its second frame assembly 12 rotating relative to the first frame assembly 11 and partially or completely covering the load-bearing position, significantly reducing the overall longitudinal dimension of the foldable frame 1 and achieving a compact storage configuration. Correspondingly, the "third state" refers to the armrest mechanism 30 being extended to a preset position, with its support position allowing the user to place their arm or apply force, providing support and stability; the "fourth state" refers to the armrest mechanism 30 rotating forward, backward, or outward relative to the second frame mechanism 20 and retracting, no longer providing support, thereby reducing the width dimension of the frame.

[0029] For example, a user can first operate the first frame mechanism 10 to switch from a first state to a second state, and then unlock and fold the armrest mechanism 30 to a fourth state; alternatively, the user can operate the armrest mechanism 30 separately to fold it, allowing the user to enter the vehicle from the side. This application provides a step-by-step folding method, enabling a complex wheelchair to be flexibly and reliably folded into a compact form, greatly facilitating transportation and storage.

[0030] It should also be noted that each state is securely maintained by corresponding components (such as locking component 21, structural connection component 32) and / or limiting structure. The foldable frame 1 provided in this embodiment of the application can provide good structural rigidity and safety in use. Moreover, each component can be reliably constrained in a preset position in different states, avoiding structural damage caused by component loosening during use or transportation, and ensuring the stability and durability of the foldable frame 1 in different states.

[0031] In some embodiments, the handrail mechanism 30 includes a handrail assembly 31 and a structural connection assembly 32. The structural connection assembly 32 includes a first connecting portion 321 and a second connecting portion 322. One of the first connecting portion 321 and the second connecting portion 322 is disposed on the handrail mechanism 30, and the other of the first connecting portion 321 and the second connecting portion 322 is disposed on the second frame mechanism 20. The first connecting portion 321 and the second connecting portion 322 can be adapted to form a structural engagement or structural lock to lock the handrail mechanism 30 in a third state and fix it to the second frame mechanism 20. Furthermore, the second connecting portion 322 and the first connecting portion 321 can disengage from the structural engagement or structural lock under the action of external force to switch the handrail mechanism 30 to a fourth state.

[0032] It should be understood that the structural connection component 32 can be a snap-fit ​​component or a locking component. That is, the first connection part 321 can be a snap-fit ​​part, and the second connection part 322 can be a snap-fit ​​mating part adapted to the snap-fit ​​part; or, the first connection part 321 can be a locking part, and the second connection part 322 can be a locking mating part adapted to the locking part.

[0033] Taking the structural connection component 32 as an example, where the first connection part 321 is an engagement part and the second connection part 322 is an engagement fitting part adapted to the engagement part, the following explanation is provided. The first connection part 321 is an active engagement component disposed on the armrest mechanism 30 or the second frame mechanism 20. It can be designed as a protrusion, hook, or elastic latch with a specific geometric shape, used to physically interfere or shape-fit with the corresponding buckle fitting part during the engagement process. The buckle fitting part is a passive engagement component disposed on the second frame mechanism 20 or the armrest mechanism 30 and corresponding to the buckle part. It can be designed as a groove, a slot, or a receiving cavity, and its shape and size are designed accordingly based on the buckle part to form a mechanical interlock.

[0034] It should also be understood that structural engagement refers to the mechanical cooperation between the latching part 321 and the latching adapter part 322, establishing a temporary fixed connection between the handrail mechanism 30 and the second frame mechanism 20. In this state, the relative movement between the handrail mechanism 30 and the second frame mechanism 20 is restricted, thereby stably fixing the handrail mechanism 30 in the third state. The structural engagement in this application is a reversible, non-permanent connection method. This structure relies on the shape fit and / or friction between the components, and the connection can be released by applying external force to the latching part 321 or the latching adapter part 322, thereby allowing the handrail mechanism 30 to switch to the fourth state.

[0035] For example, such as Figure 5 As shown, in the embodiment provided in this application, the first connecting part 321 is a rigid hook disposed on the second frame mechanism 20, which has a guide slope and a straight locking surface; correspondingly, the second connecting part 322 is a slot disposed on the armrest mechanism 30, which has a contour adapted to the shape of the hook. When the armrest mechanism 30 rotates to unfold, the guide slope of the hook first contacts the edge of the slot, and during the continued rotation, the hook undergoes elastic deformation due to the guiding effect of the slope until the straight locking surface of the hook is completely attached to the inner wall of the slot, forming a mechanical interlock. At this time, the armrest mechanism 30 is reliably locked in the third state; when unlocking is required, the hook is disengaged from the slot by pressing or by triggering the triggering component 323 linked to the slot, thereby releasing the locked state of the armrest mechanism 30.

[0036] It should be noted that by setting the first connecting part 321 and the second connecting part 322 that cooperate with each other, a stable and reliable mechanical locking is provided for the handrail mechanism 30 in the third state. This can effectively resist forces and vibrations from multiple directions during use, prevent the handrail mechanism 30 from accidentally loosening or even falling off, and ensure the stability and safety of the support. In this embodiment, a rigid hook and a slot are set to form a structural connection component 32. Its structure is easy to manufacture and assemble, which helps to control production costs.

[0037] In some embodiments, the structural connection assembly 32 is provided with a triggering component 323, which is disposed on the first frame mechanism 10 and / or the second frame mechanism 20 and connected to the first connecting part 321; wherein, when triggered by an external force, the triggering component 323 can drive the second connecting part 322 to disengage from or lock with the first connecting part 321.

[0038] For example, the triggering component 323 in this application is an unlocking button, which can be located in a position easily accessible to the user, such as the side surface of the first frame mechanism 10 or the second frame mechanism 20. The unlocking button can be mechanically connected to the first connecting part 321 by means of a linkage, push rod or direct contact. When the user applies pressure to the unlocking button, the button transmits the pressure to the first connecting part 321, driving the hook to produce a slight displacement, thereby releasing its locking constraint and realizing one-button unlocking.

[0039] It should be noted that the button-type trigger component 323 achieves precise unlocking through mechanical transmission, avoiding the risk of component damage or hand pinching that might occur if the user directly forces the armrest mechanism 30. This significantly improves operational safety and user experience, and effectively extends the service life of the structural connection component 32. At the same time, the mechanical transmission unlocking method offers direct, timely, and highly reliable response, ensuring the stable operation of the structural connection component 32 during long-term use, and also contributing to the simplification of the overall structure and cost control.

[0040] In some embodiments, the second frame mechanism 20 is connected to and / or the handrail mechanism 30 is further provided with a limiting structure; when the handrail mechanism 30 is in the fourth state, the limiting structure can abut against the handrail assembly 31 and limit the handrail assembly 31.

[0041] It should be understood that the limiting structure refers to a mechanical stop device disposed between the second frame mechanism 20 and the armrest mechanism 30. When the armrest mechanism 30 rotates in the folding direction to a predetermined position (i.e., the fourth state), the structure abuts against the armrest assembly 31 through physical contact, thereby limiting its continued rotation in the folding direction, ensuring the structural stability in the folded state, and preventing component interference or structural damage caused by excessive folding.

[0042] For example, in the embodiments of this application, the limiting structure can be embodied in two main implementation methods: first, the limiting surface can be directly machined into an integrally formed limiting surface on the shell or frame of the second frame mechanism 20 or the armrest mechanism 30; second, an independent soft rubber folding limiting block can be installed at the corresponding position.

[0043] It should be noted that by setting a limiting structure, a reliable physical guarantee is provided for the correct positioning of the folded state of the handrail mechanism 30, preventing the components from wobbling in unexpected positions. When the aforementioned soft rubber folding limiting block is used, its elastic material properties can buffer and dampen upon contact, effectively reducing the impact when folded into place, preventing wear on components due to collisions, and improving product durability. At the same time, this limiting structure is simple and reliable, requiring no additional complex adjustment mechanisms, which is beneficial for production and maintenance.

[0044] In some embodiments, the locking assembly 21 includes at least a positioning component 211 and an elastic component 212. The positioning component 211 includes a first positioning member and a positioning pin. The first positioning member is connected to the first frame assembly 11 and is provided with a first positioning groove and a second positioning groove. The positioning pin is fixed to the second frame assembly 12. The elastic component 212 is used to apply an elastic force to the first positioning member or the positioning pin so that the positioning pin is inserted into the first positioning groove or the second positioning groove. Specifically, when the first frame mechanism 10 is in a first state, the positioning pin is engaged in the first positioning groove under the action of the elastic component 212. When the first frame mechanism 10 is in a second state, the positioning pin is engaged in the second positioning groove under the action of the elastic component 212.

[0045] Optionally, the locking assembly 21 further includes an unlocking component configured to overcome the elastic force of the elastic member 212 under external force, causing the locating pin to disengage from the first or second locating groove. For example, the unlocking component is a button that contacts the elastic member 212, and overcomes the elastic force of the elastic member 212 under external force, causing the locating pin to disengage from the first or second locating groove.

[0046] It should be understood that, such as Figure 4 The locking component 21 is a locking and releasing component applied between the first frame mechanism 10 and the second frame mechanism 20. Through the coordinated action of the positioning component 211, the elastic component 212 and the unlocking component, it provides a stable and reliable lock for the first frame mechanism 10 in two preset positions: unfolded (first state) and folded (second state). It also allows the user to unlock the frame by triggering the unlocking component when needed, thereby achieving safe and convenient switching of the frame state.

[0047] It should be noted that the locking assembly 21, through the cooperation between the positioning pin and the first and second positioning slots, provides clear and stable positioning points for the unfolded and folded states of the frame, effectively preventing loosening of the mechanism due to accidental unlocking during use or movement, and significantly improving the safety and structural stability of the equipment. Furthermore, the continuous elastic force provided by the elastic component 212 ensures the automatic completion and maintenance of the locking action, achieving automatic locking and simplifying user operation. The locking assembly 21 is compact in structure and reliable in function, and is a key component for achieving efficient switching between the two modes of stable use and compact storage of the equipment.

[0048] In some embodiments, the unlocking component includes an unlocking pedal and an unlocking transmission member; the unlocking pedal is rotatably connected to the first frame assembly 11 or the second frame assembly 12; the unlocking transmission member is connected between the unlocking pedal and the positioning pin, and is used to convert the rotational motion of the unlocking pedal into the linear displacement of the positioning pin; wherein, when the unlocking pedal rotates, the unlocking transmission member drives the positioning pin to move in the direction of disengaging from the first positioning groove or the second positioning groove, so as to realize the switching of the locking assembly 21 between the locked state and the unlocked state.

[0049] It should be understood that the unlocking component is an operating component in the locking assembly 21 used to actively release the locked state. Its core function is to receive the external operating force applied by the user and, through a specific transmission method, convert this operation (such as stepping or pressing with the hand) into a mechanical action that can overcome the holding force of the elastic component 212, thereby driving the positioning pin to disengage from the positioning groove, and finally realizing the switching of the locking assembly 21 from the locked state to the unlocked state.

[0050] It should be noted that the unlocking mechanism places the unlocking pedal in a position easily accessible to the user's feet, allowing for convenient unlocking even when both hands are supporting the device, greatly enhancing operational flexibility and convenience. Furthermore, the transmission method of "converting rotational motion into linear displacement" effectively transmits force and transforms the motion form, ensuring reliable execution of the unlocking action while resulting in a more rational and compact overall structural layout.

[0051] In some embodiments, the first frame assembly 11 and the second frame assembly 12 are connected by at least one set of cross linkage mechanisms. The two ends of the cross linkage mechanism are respectively hinged to the first frame assembly 11 and the second frame assembly 12. The rotation of the cross linkage mechanism drives the first frame assembly 11 and the second frame assembly 12 to switch between a first state and a second state.

[0052] It should be noted that the cross-link mechanism in this application forms a stable structure in the unfolded state, providing good load-bearing capacity for the frame and ensuring the safety and stability of the frame in use. Secondly, during the folding process, the cross-link mechanism ensures that the first frame assembly 11 and the second frame assembly 12 symmetrically approach each other along a preset trajectory, achieving coordinated and smooth folding action, while also achieving a high degree of space compression, significantly reducing the size of the equipment after folding, making it easier to store and transport.

[0053] In some embodiments, the cross linkage mechanism includes a first support rod and a second support rod. One end of the first support rod is hinged to the first frame assembly 11, and the other end of the first support rod is hinged to the second support rod. One end of the second support rod is hinged to the second frame assembly 12, and the other end of the second support rod is hinged to the first support rod. The first support rod and the second support rod are hinged to each other at the intersection point to form a rotation center. When the first frame mechanism 10 switches between a first state and a second state, the first support rod and the second support rod rotate relative to each other around the intersection point.

[0054] Specifically, the first support rod and the second support rod are the two core connecting rod components constituting the cross linkage mechanism. The first support rod has a first hinge hole and a second hinge hole at both ends, while the second support rod has a third hinge hole and a fourth hinge hole at both ends. The first support rod is hinged to the first frame assembly 11 through its first hinge hole, and the second support rod is hinged to the second frame assembly 12 through its third hinge hole. Simultaneously, the second hinge hole of the first support rod and the fourth hinge hole of the second support rod are aligned at their ends and connected by the same hinge shaft, thus forming the intersection point. This intersection point is not only the relative rotation center of the two support rods but also the core pivot of the entire linkage mechanism's movement. During frame state switching, the first and second support rods do not move independently but constantly rotate relative to each other around this shared intersection point.

[0055] It should be noted that in this embodiment, the relative rotation between the first frame assembly 11 and the second frame assembly 12 is transformed into the rotational motion of two support rods around the intersection point, simplifying the motion and reducing manufacturing and assembly difficulties. Furthermore, the concentrated hinge structure at the intersection point effectively improves the overall structural strength and load-bearing capacity of the frame.

[0056] In some embodiments, the first frame assembly 11 is provided with a support position for carrying a target object, and the first frame assembly 11 is provided with a first connecting portion 101 for connecting a first wheel set 100. In a first state, the support position can be used to carry the target object, and in a second state, the second frame assembly 12 covers at least part of the support position. The second frame mechanism 20 includes a backrest assembly, which in a first state can be used to provide back support for the target object, and in a second state, the backrest assembly covers at least part of the support position. The second frame mechanism 20 is provided with a second connecting portion 201 and a locking assembly 21, and the second connecting portion 201 is used to connect a second wheel set 200.

[0057] It should be noted that when the frame is unfolded, the backrest assembly provides back support for the user, improving the comfort and safety of the equipment and meeting the needs of users for long-term use. In the folded state, by covering the support area, the unused space created during folding is utilized, achieving co-location storage of the backrest assembly and the support area. This greatly optimizes the spatial layout after folding, effectively reducing the overall storage volume of the equipment, making it more compact and convenient for transportation and storage.

[0058] Secondly, this application also provides a wheelchair, including: a foldable frame 1 as described above, a first wheel set 100 disposed on a first connecting portion 101, and a second wheel set 200 disposed on a second connecting portion 201. This wheelchair possesses all the functions of the aforementioned foldable frame 1 and can freely switch between a stable unfolded use state and a compact folded storage state.

[0059] For example, such as Figures 7 to 9 As shown, another embodiment of this application provides an electric wheelchair 1000. In this electric wheelchair 1000, the armrest mechanism 30 integrates control components for controlling the wheelchair's direction of travel, such as a joystick. Furthermore, the electric wheelchair 1000 also includes a drive system, which includes a motor coupled to the wheel assembly, a battery powering the entire system, and a controller receiving control commands. These electrical components are rationally arranged within the frame, enabling the electric wheelchair 1000 to possess the core mechanical advantage of convenient folding and unfolding while also integrating electric drive and intelligent control functions, providing users with a mobility solution that combines convenience, comfort, and intelligence.

[0060] In summary, this application provides a foldable frame 1 and a wheelchair. The foldable frame 1 includes a first frame mechanism 10, a second frame mechanism 20, and an armrest mechanism 30. The first frame mechanism 10 is provided with a support position for carrying a target object and includes a first frame assembly 11 and a second frame assembly 12 that can rotate relative to each other, allowing the foldable frame 1 to have an unfolded use state and a folded storage state. The second frame mechanism 20 is connected to the first frame mechanism 10 through a locking assembly 21. The locking assembly 21 has a matching structure of a positioning groove and a positioning pin, which can automatically lock in the unfolded or folded position under the action of the elastic component 212, and can be released with one key by an unlocking component. The armrest mechanism 30 is foldably connected to the second frame mechanism 20 through a structural connection assembly 32. By setting up a multi-component linkage folding and a reliable locking mechanism, this application realizes a quick and safe switching between a stable use state and a compact storage state, effectively solving the problems of complex operation and large storage volume of traditional folding structures.

[0061] It should be understood that the modular structure diagrams shown in the accompanying drawings are merely illustrative and do not necessarily include all the connections between structures. In the description of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0062] It should also be understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, herein, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0063] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above descriptions are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A foldable bicycle frame, characterized in that, include: The first frame mechanism is provided with a bearing position for carrying the target object. The first frame mechanism includes a first frame assembly and a second frame assembly that can rotate relative to each other, so that the first frame mechanism has a switchable first state and a second state. The second frame mechanism is provided with a locking assembly. The second frame mechanism is connected to the first frame mechanism through the locking assembly. The locking assembly has a switchable locked state and an unlocked state. In the locked state, the second frame mechanism is fixedly connected to the first frame mechanism through the locking assembly. In the unlocked state, the second frame mechanism is rotatably connected to the first frame mechanism. The armrest mechanism is provided with a support position for providing support for the target object. The armrest mechanism is connected to the second frame mechanism and can be folded relative to the second frame mechanism.

2. The foldable frame according to claim 1, characterized in that, The armrest mechanism has a switchable third state and a fourth state, wherein in the third state, the support position can be used to provide support for the target object, and in the fourth state, the armrest mechanism can rotate relative to the second frame mechanism to fold relative to the second frame mechanism.

3. The foldable frame according to claim 2, characterized in that, The handrail mechanism includes a handrail assembly and a structural connection assembly. The structural connection assembly includes a first connection portion and a second connection portion. One of the first connection portion and the second connection portion is disposed in the handrail mechanism, and the other of the first connection portion and the second connection portion is disposed in the second frame mechanism. The first connecting part and the second connecting part can be adapted to form a structural engagement or structural lock to lock the handrail mechanism in the third state and fix it to the second frame mechanism; and the second connecting part and the first connecting part can disengage from the structural engagement or structural lock under the action of external force to switch the handrail mechanism to the fourth state.

4. The foldable frame according to claim 3, characterized in that, The structural connection assembly is provided with a triggering component, which is disposed on the first frame mechanism and / or the second frame mechanism and connected to the first connecting part; wherein, under the triggering of an external force, the triggering component can drive the second connecting part to disengage from or lock with the first connecting part of the structure.

5. The foldable frame according to claim 3, characterized in that, The second frame mechanism connection and / or the handrail mechanism are further provided with a limiting structure; When the handrail mechanism is in the fourth state, the limiting structure can abut against the handrail assembly and limit the handrail assembly.

6. The foldable frame according to any one of claims 1-5, characterized in that, The locking assembly includes at least a positioning component and an elastic component; The positioning component includes a first positioning element and a positioning pin. The first positioning element is connected to the first frame assembly and is provided with a first positioning groove and a second positioning groove. The positioning pin is fixed to the second frame assembly. The elastic component is used to apply an elastic force to the first positioning member or the positioning pin, so that the positioning pin is inserted into the first positioning groove or the second positioning groove. Specifically, when the first frame mechanism is in the first state, the positioning pin is engaged in the first positioning groove under the action of the elastic component; when the first frame mechanism is in the second state, the positioning pin is engaged in the second positioning groove under the action of the elastic component.

7. The foldable frame according to claim 6, characterized in that, The locking assembly further includes an unlocking component configured to overcome the elastic force of the elastic component under the action of an external force, thereby disengaging the positioning pin from the first positioning groove or the second positioning groove.

8. The foldable frame according to claim 7, characterized in that, The unlocking component includes an unlocking pedal and an unlocking transmission component; the unlocking pedal is rotatably connected to the first frame assembly or the second frame assembly. The unlocking transmission component is connected between the unlocking pedal and the positioning pin, and is used to convert the rotational motion of the unlocking pedal into the linear displacement of the positioning pin; When the unlocking pedal is rotated, the unlocking transmission component drives the positioning pin to move in the direction of disengaging from the first positioning groove or the second positioning groove, so as to realize the switching of the locking assembly between the locking state and the unlocking state.

9. The foldable frame according to any one of claims 1-5, characterized in that, The first frame assembly and the second frame assembly are connected by at least one set of cross linkage mechanisms. The two ends of the cross linkage mechanism are respectively hinged to the first frame assembly and the second frame assembly. The rotation of the cross linkage mechanism drives the first frame assembly and the second frame assembly to switch between the first state and the second state.

10. The foldable frame according to claim 9, characterized in that, The cross linkage mechanism includes a first support rod and a second support rod. One end of the first support rod is hinged to the first frame assembly, and the other end of the first support rod is hinged to the second support rod. One end of the second support rod is hinged to the second frame assembly, and the other end of the second support rod is hinged to the first support rod. The first support rod and the second support rod are hinged to each other at the intersection to form a rotation center.

11. The foldable frame according to any one of claims 1-5, characterized in that, The first frame assembly is provided with the bearing position and the first frame assembly is provided with a first connecting part for connecting the first wheel set. In the first state, the bearing position can be used to bear the target object. In the second state, the second frame assembly covers at least part of the bearing position. And / or, the second frame assembly includes a backrest assembly, wherein, in the first state, the backrest assembly is available to provide back support for the target object, and in the second state, the backrest assembly covers at least a portion of the load-bearing position; and / or, the second frame assembly further includes a second connection portion for connecting a second wheelset.

12. A wheelchair, characterized in that, The wheelchair includes a foldable frame as described in any one of claims 1-11, a first wheel set disposed at the first connecting portion, and a second wheel set disposed at the second connecting portion.

Images