Wheel type moving device and carrier

Abstract

The invention discloses a wheel type moving device and a carrier. The wheel type moving device comprises a bearing frame; a carrier; the clamping mechanism is used for detachably clamping the carrier on the bearing frame; the clamping mechanism comprises a clamping piece and a clamping groove, the carrier comprises a clamping rod contained in the clamping groove, and the clamping piece can move between a first position where the clamping piece stretches into the clamping groove to fix the clamping rod in the clamping groove and a second position where the clamping piece retreats from the clamping groove to enable the clamping rod to be separated from the clamping groove. The carrier comprises a support device which comprises a first support and a second support; the first support comprises two short rods, two long rods and a supporting rod connected between the two long rods. The second support comprises a first connecting rod, and the first connecting rod is arranged on the supporting rod. The belt guiding mechanism is connected between the long rod and the first connecting rod and used for being matched with a fixing belt assembly to fix the support device to a seat.

Description

Technical Field

[0001] The invention relates to a wheeled mobile device and a carrier. Background Art

[0002] As people's living standards improve, more and more people start to keep pets, such as pet dogs and cats. During the process of keeping pets, pets may need to go to the hospital for regular examinations and treatment, or travel with their owners. In some cases, sick pets need to be transported to a pet hospital for treatment by medical staff or owners.

[0003] At present, during the clinical examination or treatment of pets, pet owners or veterinary staff are often scratched or bitten by pets. Therefore, the proper handling of pets is an issue that should be taken seriously. In medical rescue, a stretcher is a commonly used rescue tool. In the emerging pet industry, a stretcher specifically for pets has also appeared, but the existing pet stretchers are generally carried manually. However, in the case of large pets or animals, manual handling is too laborious and will delay rescue time. Therefore, a mechanism for quickly transferring pets is urgently needed.

[0004] In addition, in order to better protect the pet, the existing pet transport carrier usually has a protective cover on the carrier. The protective cover is generally detachably connected to the carrier through a connecting buckle, but the existing connecting buckle structure requires the user to insert or remove it multiple times to achieve connection or removal, which is inconvenient to operate and has a poor user experience.

[0005] Existing vehicles such as strollers, safety seats, etc. are usually equipped with a seat belt assembly to keep the occupants of the vehicle in a seated position and reduce the vibration amplitude of the occupants when impacted by external forces. The seat belt assembly usually includes a buckle and two seat belts fixed to the seat of the vehicle, one of which is connected to the male buckle of the buckle and the other is connected to the female buckle of the buckle. After the occupant rides in the vehicle, the tongue-shaped piece of the male buckle is inserted into the female buckle, and the tongue-shaped piece is locked in the female buckle until the tongue is manually released by operating the locking mechanism of the buckle. Through this arrangement, the seat belt assembly can keep the occupant in the vehicle during the occupant's ride, prevent the occupant from leaving the vehicle, and thus ensure the safety of the occupant. However, the structure of the existing buckle is relatively complex and the weight is relatively heavy. Therefore, there is an urgent need for a buckle with a simple structure and light weight. Summary of the invention

[0006] The present invention provides a wheeled mobile device, comprising: a wheel assembly, including a front wheel assembly and a rear wheel assembly; a carrier; a frame, including a front rod connected to the front wheel assembly and a rear rod connected to the rear wheel assembly; one of the front rod and the rear rod is pivotally connected to the carrier to form a first pivot point, and the front rod and the rear rod are pivotally connected to each other to form a second pivot point; the frame has an unfolded state and a folded state; optionally, a first locking mechanism is arranged between the frame and the carrier; the first locking mechanism includes a first fixing seat and a second fixing seat pivotally connected to each other, forming a The first fixing seat is fixed to the other of the front rod and the rear rod; the second fixing seat is pivotally connected to the supporting frame to form a fourth pivot point; the first locking mechanism has a locked state and an unlocked state. When the first locking mechanism is in the locked state, the first fixing seat and the second fixing seat are relatively fixed, and the frame can be locked in the expanded state; when the first locking mechanism is in the unlocked state, the first fixing seat and the second fixing seat can rotate relative to each other, allowing the frame to switch between the expanded state and the folded state.

[0007] Furthermore, the first locking mechanism also includes a first locking piece, a first locking groove, a second locking groove and an unlocking piece; the first locking groove is arranged on the first fixing seat, and the second locking groove is arranged on the second fixing seat; when the first locking mechanism is in the locking state, the first locking piece is locked and cooperated with the first locking groove and the second locking groove at the same time; the unlocking piece is movably installed on the first fixing seat, and the unlocking piece can drive the first locking piece to disengage from one of the first locking groove and the second locking groove, so that the first locking mechanism is converted from the locking state to the unlocking state.

[0008] Furthermore, the first locking mechanism also includes a first elastic member, the two ends of the first elastic member are respectively against the first locking member and the second fixing seat, and the first elastic member makes the first locking member have a tendency to move toward the first locking groove; the unlocking member includes a pressing portion and a pushing portion that are connected to each other, and the first fixing seat is provided with a sliding groove for slidingly accommodating the pressing portion and a limiting hole corresponding to the pushing portion, and the pushing portion contacts the first locking member after passing through the limiting hole.

[0009] Furthermore, a hook is provided at the end of the pushing portion for preventing the pressing portion from being disengaged from the sliding groove.

[0010] Furthermore, the frame also includes a first transition piece and a second transition piece fixed on the supporting frame, one of the front rod and the rear rod is pivotally connected to the first transition piece, the other of the front rod and the rear rod is fixed to the first fixing seat, and the second fixing seat is pivotally connected to the second transition piece.

[0011] Furthermore, the supporting frame includes two short rods and two long rods connected in sequence, and a cross frame located between the two long rods; the first transition piece is fixed on the long rods, and the second transition piece is fixed on the cross frame; or the second transition piece is fixed on the long rods, and the first transition piece is fixed on the cross frame.

[0012] Furthermore, the wheeled mobile device also includes a locking mechanism arranged on the carrier frame, and the locking mechanism is used to detachably lock the carrier on the carrier frame. The locking mechanism has a locking state and a released state. When the locking mechanism is in the locking state, the carrier is locked with the locking mechanism, and when the locking mechanism is in the released state, the carrier can be separated from the locking mechanism.

[0013] Furthermore, the support frame includes two short rods and two long rods connected in sequence, and two engaging mechanisms are respectively arranged on the two opposite short rods.

[0014] Furthermore, the locking mechanism includes a shell and a locking part movably arranged on the shell, the shell is provided with a locking slot, the carrier includes a locking rod accommodated in the locking slot, and the locking part can move between a first position of extending into the locking slot to fix the locking rod in the locking slot and a second position of withdrawing from the locking slot so that the locking rod can be detached from the locking slot.

[0015] Further, the shell body includes an upper shell and a lower shell, the upper shell and the lower shell jointly define a receiving space for the locking member to slide, the locking slot is provided in the lower shell, a through hole connecting the receiving space and the locking slot is formed between the upper shell and the lower shell, the lower shell is also provided with an operating slot connected to the receiving space, the locking member includes a locking tongue and an operating part connected to each other, the locking tongue can pass through the through hole, and the operating part can move in the operating slot, thereby driving the locking tongue to move between the first position of extending into the locking slot and the second position of exiting the locking slot.

[0016] Furthermore, the locking mechanism further includes a second elastic member, two ends of which are respectively against the lower shell and the operating portion, and the second elastic member causes the locking tongue to have a tendency to move toward the locking slot.

[0017] Further, the frame also includes a pivot seat, and the front rod and the rear rod are pivotally connected to each other via the pivot seat; and / or, the frame includes two front rods and two rear rods, the two front rods are arranged on the outside of the two rear rods, and the first locking mechanism is arranged on the front rods.

[0018] Furthermore, the pivot seat includes a first seat body and a second seat body that can rotate relative to each other, and the first seat body and the second seat body are both provided with engaging grooves, and the front rod and the rear rod are respectively engaged and fixed in the engaging grooves corresponding to the first seat body and the second seat body.

[0019] Further, the wheel assembly includes: an adapter seat, connected to the front rod or the rear rod; a universal shaft, fixed to the adapter seat; a toothed disc is provided on the universal shaft; a wheel seat, pivotally connected to the universal shaft; a caster, pivotally connected to the wheel seat; and a brake assembly, used to limit the rotation of the wheel seat relative to the adapter seat and to limit the rotation of the caster relative to the wheel seat; the brake assembly includes a pedal and a brake spring piece pivotally connected to the wheel seat, the brake spring piece includes a latch tooth and a brake part, the pedal drives the latch tooth to engage with the toothed disc to limit the rotation of the wheel seat relative to the adapter seat, and / or the pedal drives the brake part to abut the caster to limit the rotation of the caster relative to the wheel seat.

[0020] Furthermore, the brake spring piece also includes a reset spring piece, and the reset spring piece is used to drive the latching tooth to disengage from the toothed disc, and / or the reset spring piece is used to drive the brake part to separate from the caster.

[0021] Furthermore, the brake portion is provided with a protrusion that engages with the texture of the caster.

[0022] Furthermore, the wheeled mobile device also includes a carrier, which includes: a bracket device; and at least one belt guiding mechanism, which is arranged on the bracket device and is used to cooperate with a fixing belt assembly to fix the bracket device on a vehicle seat.

[0023] Furthermore, the bracket device includes a first bracket, a second bracket, and a support plate located between the first bracket and the second bracket, and the belt guiding mechanism is arranged on the second bracket and / or the support plate.

[0024] Further, the belt guiding mechanism includes a bottom shell and a surface shell connected to the bottom shell, the bottom shell and the surface shell jointly define a channel, and the channel has a first port and a second port for the fixing belt assembly to pass through.

[0025] Furthermore, the channel also has a side introduction port communicating with the first port and the second port, and the side introduction port has a guiding slope.

[0026] Furthermore, first convex ribs and second convex ribs are respectively arranged on the side walls opposite to each other in the channel, and the first convex ribs and the second convex ribs are alternately arranged in the extending direction of the fixing belt assembly.

[0027] Furthermore, the bottom shell is fixed on the supporting plate, and the surface shell is fixed to the second bracket.

[0028] Furthermore, two opposite fixing plates are provided on the second bracket, the carrier includes two belt guiding mechanisms, and the surface shell of each belt guiding mechanism is fixed to one of the fixing plates.

[0029] Furthermore, the belt guiding mechanism also includes a positioning seat penetrating the support plate, and the bottom shell is fixed to the positioning seat.

[0030] The present invention also provides a wheeled mobile device, comprising: a carrier; a carrier detachably mounted on the carrier; and a locking mechanism for detachably locking the carrier on the carrier; the locking mechanism has a locking state and a released state, when the locking mechanism is in the locking state, the carrier is locked with the locking mechanism, and when the locking mechanism is in the released state, the carrier can be separated from the locking mechanism; the locking mechanism includes a locking piece and a slot, the carrier includes a locking rod accommodated in the slot, and the locking piece can move between a first position extending into the slot to fix the locking rod in the slot and a second position withdrawing from the slot so that the locking rod can be separated from the slot.

[0031] Furthermore, the engaging member includes a latch tongue and an operating portion that are connected to each other, and the operating portion can be operated to drive the latch tongue to move between the first position of extending into the slot and the second position of exiting the slot; one end of the latch tongue has a guiding slope that contacts the engaging rod.

[0032] Furthermore, the carrier includes a belt guiding mechanism arranged on the engaging rod, the engaging mechanism is further provided with a limiting notch communicated with the engaging slot, and the belt guiding mechanism is positioned within the limiting notch.

[0033] Furthermore, the engaging rod can move between a third position close to the latch tongue and a fourth position away from the latch tongue in the slot; when the engaging rod is located at the third position, the engaging member fixes the engaging rod in the slot; when the engaging rod is located at the fourth position, the engaging rod is separated from the engaging member; when the engaging member is in the first position, the distance between the latch tongue and the side wall of the slot is greater than the width of the engaging rod.

[0034] The present invention also provides a carrier, comprising: a bracket device, comprising a first bracket, a second bracket, and a support plate located between the first bracket and the second bracket; and a carrying cloth covering the support plate.

[0035] Furthermore, the carrying cloth includes a main body and at least one handle arranged on an edge of the main body.

[0036] Furthermore, two opposite long sides of the main body are each provided with two handles.

[0037] Furthermore, the carrying cloth also includes two fixing parts respectively located at two ends of the main body, and each fixing part is sleeved on one end of the support plate.

[0038] Furthermore, the carrier includes a restraining device, which includes a plurality of restraining belts arranged at intervals, and two ends of each restraining belt respectively pass through buckles arranged on the support plate or the carrying cloth to adjust the length of the restraining belt.

[0039] Furthermore, the carrier also includes a base cloth covering the support plate, and the buckle is arranged on the base cloth.

[0040] Further, the buckle includes a locking ring, and the locking ring includes a double ring.

[0041] The present invention also provides a carrier, comprising: a bracket device; a base fabric, arranged on the bracket device; a mesh fabric, arranged on the base fabric, a accommodating space being formed between the base fabric and the mesh fabric; and a fastener assembly, comprising a fastener body and a locking piece; the fastener body having a channel, the locking piece being able to switch between a first position for closing the channel and a second position for opening the channel, so that any two of the base fabric, the mesh fabric and the bracket device can be detachably connected through the fastener assembly.

[0042] Furthermore, the base fabric includes a first connecting belt, the mesh fabric includes a second connecting belt, and the buckle assembly includes a first buckle assembly arranged between the first connecting belt and the second connecting belt.

[0043] Furthermore, the buckle body of the first buckle assembly is provided with a first connecting hole and a second connecting hole, one end of the first connecting belt is provided with a first ring, and one end of the second connecting belt is provided with a second ring; one of the first ring and the second ring passes through the first connecting hole and is fixedly connected to the buckle body, and the other of the first ring and the second ring can pass through the channel to enter the second connecting hole.

[0044] Furthermore, the buckle body is provided with a first connecting hole and a second connecting hole, and the buckle body also includes a supporting rod located between the first connecting hole and the second connecting hole, and the locking member is slidably disposed on the supporting rod to move between the first position and the second position.

[0045] Furthermore, a receiving groove for the support rod to pass through is provided in the locking member, and the buckle assembly further comprises an elastic member located in the receiving groove, and the elastic member is used to drive the locking member to move toward the first position.

[0046] Furthermore, a stopper is provided on the support rod, one end of the elastic member abuts against the stopper, and the other end of the elastic member abuts against the inner wall of the accommodating groove.

[0047] Furthermore, an operating portion protruding outward is provided at one end of the locking member away from the channel.

[0048] Further, the locking member includes a first pivot portion, a second pivot portion, a first force-applying portion, a second force-applying portion and a blocking portion, the first pivot portion and the second pivot portion are respectively pivotally connected to the buckle body, the first force-applying portion and the second force-applying portion are respectively connected to the first pivot portion and the second pivot portion, the blocking portion is located between the first force-applying portion and the second force-applying portion, and can move between the first position and the second position.

[0049] Further, the axis of the first pivot portion and the axis of the second pivot portion are staggered with each other, and the locking member is made of an elastically deformable material; and / or, an edge of the buckle body close to the channel is provided with a limiting protrusion protruding toward the second connecting hole, and the blocking portion is engaged with the limiting protrusion when in the first position.

[0050] Further, the base fabric includes a fixing belt, the bracket device is provided with a positioning plate, and the fastener assembly includes a second fastener assembly arranged between the positioning plate and the fixing belt; and / or, the mesh fabric includes a second connecting belt, the bracket device is provided with a third connecting belt, and the fastener assembly includes a third fastener assembly arranged between the second connecting belt and the third connecting belt.

[0051] Further, the bracket device includes a first bracket, a second bracket, and a support plate located between the first bracket and the second bracket, the positioning plate is arranged on the support plate, the buckle body of the second buckle assembly is provided with a first connecting hole and a second connecting hole, one end of the fixing belt is provided with a third ring, and one end of the positioning plate is provided with a fourth ring; one of the third ring and the fourth ring passes through the first connecting hole and is fixedly connected to the buckle body, and the other of the third ring and the fourth ring can pass through the channel to enter the second connecting hole.

[0052] Furthermore, the base fabric further includes a first connecting belt, the mesh fabric includes a second connecting belt, and the fastener assembly further includes a first fastener assembly disposed between the first connecting belt and the second connecting belt.

[0053] Furthermore, the base fabric includes a main body, the fixing belt is located at the edge of the main body, one end of the fixing belt is connected to the second buckle assembly, and the first connecting belt is arranged at the other end of the fixing belt.

[0054] Furthermore, the first connecting belt is integrally formed with the fixing belt, or the first connecting belt is fixed to a position of the main body corresponding to the fixing belt, and extends in a direction opposite to an extending direction of the fixing belt.

[0055] Furthermore, one end of the second connecting belt is provided with a second loop passing through the first connecting hole and fixedly connected to the buckle body, and one end of the first connecting belt is provided with a first loop passing through the channel to enter the second connecting hole, and the first loop is detachably connected to the base fabric by Velcro.

[0056] Furthermore, the mesh cloth includes a second connecting belt, the bracket device is provided with a third connecting belt, and the buckle assembly includes a third buckle assembly arranged between the second connecting belt and the third connecting belt.

[0057] Furthermore, the bracket device includes a first bracket, a second bracket, and a support plate located between the first bracket and the second bracket, the third connecting belt is arranged on the support plate, and the third connecting belt is detachably connected to the base fabric by Velcro.

[0058] The present invention also provides a carrier, comprising: a bracket device; a base fabric, arranged on the bracket device; a mesh fabric, arranged on the base fabric, a accommodating space being formed between the base fabric and the mesh fabric; and a first buckle assembly, comprising a male buckle and a female buckle, one of the male buckle and the female buckle is connected to the base fabric via a first connecting belt, the other of the male buckle and the female buckle is connected to the mesh fabric via a second connecting belt, and the male buckle is detachably plugged into the female buckle.

[0059] The present invention also provides a wheeled mobile device, comprising: a wheel assembly, including a front wheel assembly and a rear wheel assembly; a frame, including a front support frame connected to the front wheel assembly and a rear support frame connected to the rear wheel assembly, the front support frame and the rear support frame being pivotally connected to each other so that the frame can be switched between an expanded state and a folded state; a clamping slot is provided on the frame; a carrier is provided with a second locking mechanism; the second locking mechanism includes a second locking piece, the second locking piece can be moved on the carrier and has a locking position and a releasing position; when the carrier is mounted on the frame and the second locking piece is in the locking position, the second locking piece extends into the clamping slot to lock the carrier with the frame; when the second locking piece is in the releasing position, the second locking piece retracts from the clamping slot to release the lock between the carrier and the frame.

[0060] Further, the carrier includes a bracket device, which includes a first bracket, the first bracket includes two short rods and two long rods connected in sequence, and a support rod connected between the two long rods, and the second locking mechanism is arranged on the support rod; and / or, when the frame is in the unfolded state, the carrier limits the frame from switching to the folded state by a detachable connection with the frame, the upper end of the front support frame and the upper end of the rear support frame are far away from each other, and the lower end of the front support frame and the lower end of the rear support frame are far away from each other; when the frame is in the folded state, the carrier is detached from the frame, the upper end of the front support frame and the upper end of the rear support frame are close to each other, and the lower end of the front support frame and the lower end of the rear support frame are close to each other.

[0061] Furthermore, the second locking mechanism also includes a driving member, which is operably connected to the second locking member. The driving member can move on the carrier and has a first position and a second position. When the driving member is in the first position, the second locking member is in the locking position, and when the driving member is in the second position, the second locking member is in the releasing position.

[0062] Furthermore, the second locking mechanism also includes a first guide column fixed to the second locking member, the driving member is provided with a first guide groove, the first guide groove extends obliquely relative to the moving direction of the driving member, and the first guide column can slide in the first guide groove; when the driving member switches between the first position and the second position, the second locking member can switch between the locking position and the releasing position through the cooperation between the first guide column and the first guide groove.

[0063] Furthermore, the second locking mechanism further includes an elastic return member, which abuts against the driving member and is used to keep the driving member in the first position.

[0064] Furthermore, the support rod has a receiving space for the driving member to move, and the support rod is also provided with a telescopic hole group for the second locking member to pass through, and the telescopic hole group is connected to the receiving space.

[0065] Further, the support rod includes a rod body and a mounting cover, a cavity is formed in the rod body, and a placement opening connected to the cavity is opened on the rod wall of the rod body; the mounting cover includes a top cover and a limiting member connected to one side of the top cover, the receiving space is opened inside the limiting member, the top cover is arranged at the placement opening, and the limiting member is accommodated in the cavity; the telescopic hole group includes a first telescopic hole and a second telescopic hole which are correspondingly arranged, the first telescopic hole is arranged on the rod body and connected to the cavity, and the second telescopic hole is arranged on the limiting member and connected to the receiving space.

[0066] Furthermore, the frame includes at least one support seat, each support seat is provided with a support groove, and the engaging groove is provided on the support seat and is connected to the support groove; when the vehicle is installed on the frame, the support rod is engaged in the support groove, and when the second locking member is in the locking position, the second locking member extends into the engaging groove, and when the second locking member is in the releasing position, the second locking member retracts from the engaging groove.

[0067] Furthermore, the number of the support rods is two, and the two support rods are spaced apart along the length direction of the long rod, and each of the support rods is provided with at least one of the second locking mechanisms; at least two of the support seats are respectively provided on the front support frame and the rear support frame; one of the support rods can be locked to the support seat on the front support frame by at least one second locking mechanism, and the other support rod can be locked to the support seat on the rear support frame by at least one second locking mechanism.

[0068] Furthermore, the support seat includes a connecting section, a supporting section and a limiting section which are connected in sequence and arranged at an angle, the connecting section, the supporting section and the limiting section together form the supporting groove, the connecting section is fixed on the frame, and the engaging groove is opened on a side of the limiting section facing the supporting groove.

[0069] Furthermore, the wheeled mobile device further comprises a release assembly disposed on the carrier, and the release assembly is used for driving the second locking member to move from the locking position to the release position.

[0070] Furthermore, the release assembly includes a release member slidably mounted to the carrier, and the release member is connected to the driving member via a traction member.

[0071] Furthermore, the release member has a second guide groove, which extends obliquely relative to the sliding direction of the release member; the release assembly also includes a second guide column, which is arranged in the second guide groove and can slide along the second guide groove, and the second guide column is connected to the driving member through the traction member.

[0072] Furthermore, an inner cavity is formed in the carrier, and an operating hole connected to the inner cavity is provided on the side wall of the carrier, and the release member passes through the operating hole and extends into the inner cavity and can slide relative to the operating hole; the release assembly also includes a first fixed cover and a second fixed cover, the first fixed cover and the second fixed cover cooperate and are fixed to the carrier, and the first fixed cover and the second fixed cover are provided with a limiting portion extending into the inner cavity on the opposite side, and a limiting slide groove is provided on the limiting portion, and the two ends of the second guide column are respectively slidably limited in the corresponding limiting slide groove; the extension direction of the limiting slide groove is perpendicular to the sliding direction of the release member.

[0073] Furthermore, the carrier includes: a support device, and at least one belt guiding mechanism, wherein the belt guiding mechanism is arranged on the support device and has a passage for the fixing belt assembly to pass through.

[0074] Further, the bracket device includes a first bracket and a second bracket, the first bracket includes two short rods and two long rods connected in sequence, and a support rod connected between the two long rods; the second bracket includes two first connecting rods and a second connecting rod connected between the two first connecting rods, and the two first connecting rods are arranged on the support rod at intervals along the length direction of the support rod; the two belt guiding mechanisms are respectively arranged at both ends of the support rod, and the two belt guiding mechanisms are respectively connected between the corresponding first connecting rods and the corresponding long rods.

[0075] Furthermore, the belt guiding mechanism includes a clamp body and a cover plate, the clamp body includes an upper shell and a lower shell connected to the upper shell, the upper shell and the lower shell together define the penetration channel, the upper shell cooperates with the cover plate and is fixed to the first connecting rod, and the lower shell is fixed to the long rod.

[0076] Furthermore, the penetration channel has a first port and a second port for the fixing belt assembly to pass through, and a side inlet connecting the first port and the second port; first convex ribs and second convex ribs are respectively arranged on the side walls opposite to each other in the penetration channel, and the first convex ribs and the second convex ribs are alternately arranged in the extension direction of the penetration channel.

[0077] Furthermore, the wheeled mobile device also includes a linkage mechanism, which is pivotally connected between the front support frame and the rear support frame, and the linkage mechanism has an extended state and a folded state. When the linkage mechanism switches between the extended state and the folded state, the frame switches between the expanded state and the folded state in conjunction with the linkage mechanism; the linkage mechanism includes a rotating member and a linkage member pivotally connected to each other, one of the first end of the rotating member and the first end of the linkage member is pivotally connected to the front support frame, and the other is pivotally connected to the rear support frame.

[0078] Furthermore, the linkage mechanism includes two rotating members, two linkage members and an operating handle connected to the second ends of the two rotating members, each linkage member is pivotally connected between the first end and the second end of a rotating member, and the operating handle is used to drive the two rotating members to rotate synchronously.

[0079] Furthermore, the wheeled mobile device also includes a covering, and the covering is covered on the carrier.

[0080] The present invention also provides a carrier, comprising: a bracket device, comprising a first bracket and a second bracket connected to each other; the first bracket comprises two short rods and two long rods connected in sequence, and a support rod connected between the two long rods; the second bracket comprises a first connecting rod, the first connecting rod is arranged on the support rod; and at least one belt guiding mechanism, connected between the long rod and the first connecting rod, the belt guiding mechanism is used to cooperate with a fixing belt assembly to fix the bracket device to a seat.

[0081] Furthermore, two first connecting rods are provided, and the two first connecting rods are arranged on the support rod at intervals along the length direction of the support rod; the second bracket also includes a second connecting rod, and the second connecting rod is connected between the two first connecting rods; and / or, the two belt guiding mechanisms are respectively arranged at both ends of the support rod, and the two belt guiding mechanisms are respectively connected between the corresponding first connecting rod and the corresponding long rod.

[0082] Further, the fixing belt assembly includes a restraining belt assembly, and the restraining belt assembly includes at least one restraining belt; the belt guiding mechanism includes a clamp body, and the clamp body includes an upper shell and a lower shell connected to the upper shell, and the upper shell and the lower shell jointly define a penetration channel, and the penetration channel has a first port and a second port for the restraining belt to pass through; the upper shell is fixed to the first connecting rod, and the lower shell is fixed to the long rod.

[0083] Furthermore, in the two belt guiding mechanisms arranged at both ends of the support rod, when the restraint belt passes through the belt guiding mechanism away from the seat back, one end of the restraint belt passes through the first port and extends around the outer side of the first bracket; the other end of the restraint belt passes through the second port and extends from the second bracket and the lower side of the support rod.

[0084] Furthermore, when the restraint belt passes through the two belt guiding mechanisms arranged at the two ends of the support rod, the restraint belt is passed between the second bracket and the load-bearing part of the covering and extends along the guide direction of the second connecting rod, and the two ends of the restraint belt respectively pass through the two belt guiding mechanisms and extend from the outside of the first bracket.

[0085] The present invention also provides a fastener, comprising: a male fastener, which includes a tongue-shaped piece with a locking hole; and a female fastener, which is suitable for receiving and releasably locking the tongue-shaped piece of the male fastener, the female fastener comprising: a female fastener shell, one end of which has a socket for inserting the tongue-shaped piece; and a locking piece, which is arranged in the female fastener shell, the locking piece has a locking protrusion, and the locking protrusion is suitable for protruding into the locking hole to enable the locking piece to engage with the tongue-shaped piece; the female fastener shell comprises a shell body and a cover plate connected to each other; the female fastener also includes a reinforcing fixing piece, which is accommodated between the shell body and the cover plate and is kept fixed relative to the shell body, wherein a tongue-shaped piece accommodating cavity for accommodating the tongue-shaped piece is formed between the bottom surface of the reinforcing fixing piece and the lower part of the shell body.

[0086] Furthermore, the female fastener housing comprises a housing body and a cover plate connected to each other, and the housing end wall of the housing body and the cover plate end wall of the cover plate define the socket.

[0087] Further, the locking member is configured to releasably retain the tongue-shaped piece in the tongue-shaped piece receiving cavity.

[0088] Furthermore, the male fastener also includes a male fastener connecting portion, which is provided with a male fastener belt hole for connecting the first webbing; the female fastener also includes a female fastener connecting portion, which is provided with a female fastener belt hole for connecting the second webbing.

[0089] Further, the female fastener shell includes a shell body and a cover plate connected to each other; the cover plate includes a cover plate extension, and the cover plate extension is provided with a cover plate hole; the shell body includes a shell body extension, and the shell body extension is provided with a shell body hole; the cover plate hole and the shell body hole cooperate to form the female fastener hole.

[0090] Furthermore, the female fastener also includes a reinforcing fixing member, which is accommodated in the female fastener shell; a reinforcing fixing member belt hole is provided at a position of the reinforcing fixing member corresponding to the female fastener belt hole, and the shape and size of the reinforcing fixing member belt hole match the shape and size of the female fastener belt hole.

[0091] Furthermore, the reinforcing fixing piece is bent at one end adjacent to the socket and extends toward the bottom wall of the shell body to form a first vertical portion, the first vertical portion abuts against the peripheral wall of the shell body, and is provided with a first limiting opening suitable for the tongue-shaped piece to pass through; the middle part of the reinforcing fixing piece has a second vertical portion extending toward the bottom wall of the shell body and parallel to the first vertical portion, and the second vertical portion has a second limiting opening suitable for the tongue-shaped piece to pass through.

[0092] Furthermore, the female fastener also includes an elastic return member, which is suitable for biasing the locking member so that the locking protrusion of the locking member protrudes into the locking hole of the tongue-shaped piece.

[0093] Furthermore, the shell body has two vertical walls extending vertically upward from the bottom wall of the shell body, and each of the vertical walls has a groove structure opposite to each other; the female fastener also includes two guide members, and the two guide members are installed in the two groove structures; the locking member has two arms extending outward, and the two arms can be slidably accommodated in the two guide members respectively.

[0094] Further, the cross sections of the two guide members are both C-shaped, and the two guide members have a sliding channel suitable for accommodating the arm and allowing the arm to slide.

[0095] Furthermore, the reinforcing fixing member is provided with two rectangular holes, and the two guide members extend through the two rectangular holes respectively.

[0096] Furthermore, one end of the locking protrusion close to the socket has a driving slope to allow the tongue-shaped piece to be inserted into the tongue-shaped piece accommodating cavity and pass over the locking protrusion.

[0097] Further, the locking protrusion has a first position and a second position; when the locking protrusion is in the first position, the locking protrusion protrudes into the tongue-shaped piece accommodating cavity, and the locking piece is suitable for engaging with the tongue-shaped piece; when the locking protrusion is in the second position, the locking protrusion withdraws from the tongue-shaped piece accommodating cavity to allow the tongue-shaped piece to be inserted.

[0098] Furthermore, the female fastener also includes a release member, a portion of which is exposed from the outer surface of the cover plate for operation, and the release member can be operated to disengage the locking protrusion of the locking member from the tongue-shaped piece; the release member includes a release member body and at least one push rod, the release member body is located between the cover plate and the reinforcing fixing member, the at least one push rod extends through the reinforcing fixing member and abuts against the locking member, and the at least one push rod is suitable for pushing the locking member out of engagement with the locking hole when the release member is operated.

[0099] Further, the cover plate is connected to the shell body through a plurality of fasteners, and the plurality of fasteners pass through the reinforcing fixing member to fix the reinforcing fixing member between the cover plate and the shell body.

[0100] Furthermore, one of the male fastener and the female fastener includes an anti-foolproofing boss, and the other of the male fastener and the female fastener includes an anti-foolproofing notch, and the anti-foolproofing notch is suitable for the anti-foolproofing boss to enter or pass through to limit the orientation of the tongue-shaped piece of the male fastener when it is inserted into the female fastener.

[0101] Furthermore, the anti-foolproofing boss is located on the first side of the tongue-shaped piece, and the anti-foolproofing notch is located on the first side of the female fastener shell and is adjacent to the upper edge of the socket; when the first side of the tongue-shaped piece faces the first side of the female fastener shell and is inserted into the socket, the anti-foolproofing boss enters or passes through the anti-foolproofing notch to allow the tongue-shaped piece to be further inserted into the socket; when the second side of the tongue-shaped piece opposite to the first side faces the first side of the female fastener shell and is inserted into the socket, the shell end wall of the shell body abuts against the anti-foolproofing boss to prevent the tongue-shaped piece from being further inserted into the socket.

[0102] Furthermore, the female fastener housing comprises a housing body and a cover plate which are connected to each other; the first side of the female fastener housing is one side of the cover plate, or one side of the housing body.

[0103] The present invention also provides a carrier, comprising: a first webbing; a second webbing; and the above-mentioned buckle, wherein the first webbing is connected to a male fastener of the buckle, and the second webbing is connected to a female fastener of the buckle. BRIEF DESCRIPTION OF THE DRAWINGS

[0104] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0105] Figure 1 is a perspective view of a wheeled mobile device according to an embodiment, Figure 2 for Figure 1 A front view of the wheeled mobile device shown, Figure 3 for Figure 1 a left side view of the wheeled mobile device shown;

[0106] Figure 4 is a perspective exploded view of a first locking mechanism according to an embodiment, Figure 5 for Figure 4 A perspective exploded view of the first locking mechanism from another angle, Figure 6 for Figure 4 The first locking mechanism is shown in a cross-sectional view in a locked state, Figure 7 for Figure 4 A cross-sectional view showing the first locking mechanism in an unlocked state;

[0107] Figure 8 for Figure 2 The front view of the wheeled mobile device when it is folded, Fig. 9 for Figure 2 A front view of the wheeled mobile device after it is folded;

[0108] Fig.10 is a top view of a carrier according to an embodiment, Fig.11 for Fig.10 Bottom view of the vehicle shown, Fig.12 For along Fig.11 The enlarged cross-sectional view of the U1-U1 line, Fig.13 For along Fig.11 The enlarged cross-sectional view of the U2-U2 line, Fig.14 For along Fig.10 An enlarged cross-sectional view of the U3-U3 line;

[0109] Fig.15 for Fig.10 The enlarged view of the belt guide mechanism after omitting the cover is shown. Fig.16 for Fig.10 A partial enlarged view of the belt guide mechanism from another angle;

[0110] Fig.17 for Figure 1 A three-dimensional view of the wheeled mobile device after removing the carrier, Fig.18 for Fig.17 A top view of the engaging mechanism shown, Fig.19 for Fig.17 A bottom view of the engaging mechanism shown, Fig. 20 for Fig.17 The three-dimensional exploded view of the locking mechanism shown, Fig.21 for Fig.17 a cross-sectional view of the wheeled mobile device shown; Fig. 22 for Fig.21 The enlarged view of the N1 in the middle shows that the engagement mechanism is in the engagement state; Fig.23 for Fig.21 The enlarged view of the N1 in the middle shows that the locking mechanism is in the unlocked state; Fig.24 for Fig.21 The enlarged view of the position N2 in the middle shows that the locking rod is in the third position; Fig.25 for Fig.21 The enlarged view of the position N2 in the middle, at this time the locking rod is in the fourth position;

[0111] Fig.26 is a perspective view of a wheeled mobile device according to another embodiment, Fig. 27 for Fig.26 A perspective view of the wheeled mobile device from another angle, Fig.28 for Fig.26 A front view of the wheeled mobile device shown, Fig.29 for Fig.26 A left side view of the wheeled mobile device shown, Fig.30 for Fig.26 A top view of the wheeled mobile device shown; Fig.31 for Fig.26 The partially enlarged exploded view of the wheeled mobile device shown, Fig.32 for Fig.26 A partially enlarged exploded view of the wheeled mobile device from another angle; Fig.33 for Fig.26 A three-dimensional view of the wheeled mobile device after it is folded;

[0112] Fig.34 is a perspective view of a wheel assembly in a free-rotation state according to an embodiment, Fig.35 for Fig.34 A front view of the wheel assembly shown, Fig.36 for Fig.34 A cross-sectional view of the wheel assembly shown, Fig.37 for Fig.34 An exploded perspective view of the wheel assembly shown; Fig.38 for Fig.37 A three-dimensional enlarged picture of the brake shrapnel. Fig.39 for Fig.37 A magnified stereoscopic image of the middle brake shrapnel from another angle;

[0113] Fig.40 is a perspective view of a wheel assembly in a braking state according to an embodiment, Fig.41 for Fig.40 A front view of the wheel assembly shown, Fig.42 for Fig.40 A cross-sectional view of the wheel assembly shown, Fig.43 A schematic diagram showing the engagement of the brake spring and the toothed disc is shown;

[0114] Fig.44 is a perspective view of a carrier according to another embodiment, Fig.45 for Fig.44 Schematic diagram of the middle carrying cloth;

[0115] Fig.46 A schematic diagram of a carrying cloth according to another embodiment;

[0116] Fig.47 is a perspective view of a carrier according to another embodiment, Fig.48 for Fig.47 a perspective view of the vehicle shown from another angle;

[0117] Fig.49 is a perspective view of a carrier according to an embodiment when it is installed on a cart;

[0118] Fig.50 is a perspective view of a carrier according to an embodiment, Fig.51 for Fig.50 The three-dimensional image of the carrier shown with the mesh removed. Fig.52 for Fig.51 Bottom view of the vehicle shown, Fig.53 This is a schematic diagram of the base fabric and the support plate being separated. Fig.54 This is a partial enlarged view of the connection between the base fabric and the support plate. Fig.55 for Fig.52 A partial enlarged view of the vehicle shown, Fig.56 for Fig.50 A front view of the mesh shown;

[0119] Fig.57 is a front view of a buckle assembly according to an embodiment, Fig.58 for Fig.57 A perspective view of the buckle assembly shown, Fig.59 for Fig.58 The exploded perspective view of the buckle assembly shown, Fig.60 for Fig.58 A cross-sectional view of a state of the fastener assembly is shown. Fig.61 for Fig.58 A cross-sectional view of the buckle assembly in another state;

[0120] Fig.62 is a bottom view of a carrier according to another embodiment, Fig.63 is a front view of a mesh according to another embodiment;

[0121] Fig.64 is a front view of a buckle assembly according to another embodiment, Fig.65 for Fig.64 A perspective view of the buckle assembly shown;

[0122] Fig.66 is a front view of a buckle assembly according to another embodiment, Fig.67 for Fig.66 A perspective view of the buckle assembly shown;

[0123] Fig.68 is a front view of a buckle assembly according to another embodiment, Fig.69 for Fig.68 The front view of the buckle assembly when unlocked, Fig.70 for Fig.68 Side view of the buckle assembly shown.

[0124] Fig.71 is a front view of a buckle assembly according to another embodiment, Fig.72 for Fig.71 A perspective view of the buckle assembly shown;

[0125] Fig.73 is a bottom view of a carrier according to another embodiment, Fig.74 This is a partial enlarged view of the connection between the positioning piece and the fixing belt. Fig.75 This is a partial enlarged view of the positioning piece and the fixing belt when they are separated;

[0126] Fig.76 for Fig.73 A partial enlarged view of another state of the vehicle shown, Fig.77 for Fig.73 A partial enlarged view of another state of the vehicle shown, Fig.78 for Fig.73 A partial enlarged view of another state of the vehicle is shown.

[0127] Fig.79 It is a three-dimensional diagram of a wheeled mobile device in one embodiment of the present application;

[0128] Fig.80 for Fig.79A perspective view of the wheeled mobile device shown with the covering omitted;

[0129] Fig.81 for Fig.79 A perspective view of a frame of the wheeled mobile device shown;

[0130] Fig.82 for Fig.79 A top view of a frame of the wheeled mobile device shown;

[0131] Fig.83 for Fig.79 A side view of a frame of the wheeled mobile device shown, wherein the frame is in an unfolded state;

[0132] Fig.84 for Fig.79 A side view of a frame of the wheeled mobile device, wherein the frame is in a state between an expanded state and a collapsed state;

[0133] Fig.85 for Fig.79 A side view of a frame of the wheeled mobile device, wherein the frame is in a folded state;

[0134] Fig.86 for Fig.80 An exploded view of the wheeled mobility device shown;

[0135] Fig.87 For along Fig.80 Sectional view along the U31-U31 line;

[0136] Fig.88 for Fig.80 A perspective view of the vehicle in the wheeled mobile device when it is in the front view, the vehicle is equipped with a second locking mechanism, a release assembly and a belt guiding mechanism;

[0137] Fig.89 for Fig.88 An exploded view of a portion of the second locking mechanism and the release assembly in the carrier;

[0138] Fig.90 for Fig.80 A perspective view of the vehicle in the wheeled mobile device when it is at the reverse side, the vehicle is equipped with a second locking mechanism, a release assembly and a belt guiding mechanism;

[0139] Fig.91 for Fig.90 An exploded view of a portion of the second locking mechanism and the release assembly in the carrier;

[0140] Fig.92 for Fig.91 A perspective view of a drive member in the second locking mechanism shown;

[0141] Fig.93 for Fig.79 A side view of the wheeled mobile device shown with the covering omitted;

[0142] Fig.94 For along Fig.93 The cross-sectional view of the U32-U32 line is for the convenience of display. Fig.94 The cross-sectional view is rotated 90 degrees clockwise;

[0143] Fig.95 For along Fig.80 A cross-sectional view taken along line U33-U33, wherein the release assembly is in a state where the second locking member is not released;

[0144] Fig.96 For along Fig.93 The cross-sectional view of the line U34-U34 in the figure shows that the release assembly is in a state where the second locking member is not released; for ease of display, Fig.96 The cross-sectional view is rotated 90 degrees clockwise;

[0145] Fig.97 For along Fig.80 A cross-sectional view taken along line U33-U33, wherein the release assembly is in a state of releasing the second locking member;

[0146] Fig.98 For along Fig.93 The cross-sectional view of the line U34-U34 in the figure shows that the release assembly is in the state of releasing the second locking member; for the convenience of display, Fig.98 The cross-sectional view is rotated 90 degrees clockwise;

[0147] Fig.99 for Fig.90 An exploded view of the belt guide mechanism of the carrier shown, Fig.100 for Fig.99 A three-dimensional view of the middle belt guide mechanism;

[0148] Fig.101 for Fig.88 A side view of the vehicle shown, Fig.102 For along Fig.101 Sectional view of line U35-U35;

[0149] Fig.103 This is a top view of a carrier in one embodiment of the present application. Fig.104 for Fig.103 Bottom view of the vehicle shown, Fig.105 For along Fig.103 Sectional view of line U36-U36;

[0150] Fig.106 for Fig.79 A perspective view of a wheel assembly in the wheeled mobile device, wherein the wheel assembly is in a free-rotating state; Fig.107A perspective view of a brake spring is shown;

[0151] Fig.108 is a schematic diagram of a buckle according to an embodiment of the present invention, wherein the male buckle component is separated from the female buckle component;

[0152] Fig.109 for Fig.108 A top view of the fastener in which the male fastener is engaged with the female fastener; Fig.110 for Fig.109 Bottom view of the buckle shown, Fig.111 for Fig.109 a side view of the buckle shown;

[0153] Fig.112 for Fig.108 A perspective view of a male fastener in FIG.

[0154] Fig.113 for Fig.108 An exploded perspective view of the female fastener in FIG.

[0155] Fig.114 for Fig.109 a perspective view of the buckle shown with the release member not depressed; Fig.115 Shown along Fig.114 A cross section taken along the line U11-U11; Fig.116 Shown along Fig.114 A cross section taken along line U12-U12;

[0156] Fig.117 for Fig.109 a perspective view of the buckle shown with the release member depressed; Fig.118 Shown along Fig.117 A cross section taken along line U13-U13; Fig.119 Shown along Fig.117 A cross section taken along line U14-U14;

[0157] Fig.120 A perspective view of a male fastener of a fastener according to an embodiment of the present invention;

[0158] Fig.121 A perspective view of a female fastener of a fastener according to an embodiment of the present invention;

[0159] Fig.122 for Fig.121 A perspective view of a cover plate of a female fastener shown in FIG.

[0160] Fig.123 for Fig.120 and Fig.121 A perspective view of the fastener shown with the male fastener being attached to the female fastener;

[0161] Fig.124 Shown after removing the cover Fig.123 Buckle shown.

[0162] Fig.125 Shown along Fig.123 A cross section taken along line U15-U15;

[0163] Fig.126 for Fig.123 A bottom view of the fastener shown, wherein the male fastener is reversely mounted to the female fastener;

[0164] Fig.127 Shown along Fig.126 A cross section taken along line U16-U16. DETAILED DESCRIPTION

[0165] See also Figure 1-Figure 3 According to an embodiment of the present application, a wheeled mobile device 100 includes a wheel assembly 10, a frame 20, a carrier 30, a support frame 40, and a first locking mechanism 50. The wheel assembly 10 includes a front wheel assembly 12 and a rear wheel assembly 14. The frame 20 includes a front rod 22 connected to the front wheel assembly 12 and a rear rod 24 connected to the rear wheel assembly 14. The middle portion of the front rod 22 and the middle portion of the rear rod 24 are pivotally connected to each other. The support frame 40 is pivotally connected to the front rod 22 and the rear rod 24 respectively. The carrier 30 is detachably mounted on the support frame 40. The frame 20 has Figure 2 The expanded state shown and Fig. 9 The first locking mechanism 50 is disposed between the frame 20 and the carrier 40. The first locking mechanism 50 has a locked state and an unlocked state. When the first locking mechanism 50 is in the locked state, the frame 20 is locked in the deployed state or the folded state. When the first locking mechanism 50 is in the unlocked state, the frame 20 can be freely switched between the deployed state and the folded state.

[0166] In this embodiment, the wheel assembly 10 includes two front wheel assemblies 12 and two rear wheel assemblies 14. The frame 20 includes two front rods 22 connected to the two front wheel assemblies 12 and two rear rods 24 connected to the two rear wheel assemblies 14. The two front rods 22 are arranged in parallel and are fixedly connected by a front reinforcing rod 23. The front reinforcing rod 23 and the two front rods 22 can be collectively referred to as a front support frame. The two rear rods 24 are arranged in parallel and are fixedly connected by a rear reinforcing rod 25. The rear reinforcing rod 25 and the two rear rods 24 can be collectively referred to as a rear support frame. Each front rod 22 is cross-arranged with the corresponding rear rod 24 and is rotatably connected by a pin. More specifically, the two rear rods 24 are arranged on the outside of the two front rods 22, that is, the distance between the two rear rods 24 is slightly larger than the distance between the two front rods 22. In other embodiments, the two rear rods 24 are disposed inside the two front rods 22 , that is, the distance between the two rear rods 24 is slightly smaller than the distance between the two front rods 22 .

[0167] like Figure 1 and Fig.17 As shown, the carrier 40 is mainly used to support the carrier 30. The structure of the carrier 40 is generally a square frame, which includes two short rods 42 and two long rods 44. The two short rods 42 and the two long rods 44 are parallel to each other and connected end to end in sequence, so as to facilitate the user to push and pull the frame 20. In order to increase the structural strength, two parallel and spaced cross bars 43 are also provided between the two long rods 44.

[0168] like Figure 4 and Fig.17 As shown, in this embodiment, the frame 20 further includes a first transition piece 26 and a second transition piece 28 fixed to the carrier frame 40. The first transition piece 26 is pivotally connected to the rear rod 24, and the second transition piece 28 is pivotally connected to the front rod 22. Specifically, one end of the first transition piece 26 is fixed to the long rod 44 by screws or welding, and the other end of the first transition piece 26 is pivotally connected to the rear rod 24. One end of the second transition piece 28 is inserted into and fixed to the cross bar 43, and the other end of the second transition piece 28 is pivotally connected to the front rod 22 through a first locking mechanism 50. It is understood that in other embodiments, the first transition piece 26 may also be pivotally connected to the front rod 22, and the second transition piece 28 may be pivotally connected to the rear rod 24. It is understood that in other embodiments, one end of the second transition piece 28 may also be fixed to the short rod 42 instead of being fixed to the cross bar 43. In addition, in other embodiments, if the distance between the two long rods 44 of the carrier 40 is not equal, or the front rod 22 and the rear rod 24 are bent, the first transition piece 26 and the second transition piece 28 may also be pivotally connected to the long rod 44. In addition, the first transition piece 26 and the second transition piece 28 may also be omitted, in which case the front rod 22 and the rear rod 24 are directly pivotally connected to the carrier 40.

[0169] In this embodiment, two first locking mechanisms 50 are respectively disposed at the upper ends of the two front rods 22. However, it can be understood that the first locking mechanism 50 can also be disposed at the upper end of the rear rod 24. In addition, the number of the first locking mechanisms 50 can also be four or more.

[0170] See also Figure 4 and Figure 5 The first locking mechanism 50 includes a first fixing seat 51 , a second fixing seat 52 , a first locking member 53 , an unlocking member 54 and a first elastic member 55 .

[0171] The first fixing seat 51 is generally disc-shaped and fixedly connected to the upper end of the front rod 22. In other embodiments, the first fixing seat 51 may also be fixedly connected to the upper end of the rear rod 24. A sliding groove 512 for slidably accommodating the unlocking member 54 is provided on one side of the first fixing seat 51, and a generally annular first accommodation space 511 is provided on the other side of the first fixing seat 51. The first fixing seat 51 is provided with a hollow shaft sleeve 514 in the middle of the first accommodation space 511. The first fixing seat 51 also includes a first locking groove 516 provided at the edge of the first accommodation space 511 and surrounding the shaft sleeve 514.

[0172] The second fixed seat 52 includes a main body portion that is roughly disc-shaped and a connecting arm 522 that is fixedly connected to the main body portion. The connecting arm 522 is pivotally connected to the second transition piece 28 through a pin. A second accommodating space 521 that is roughly annular is provided inside the main body portion. The second fixed seat 52 is provided with a rotating shaft 524 in the middle of the second accommodating space 521. The rotating shaft 524 can be inserted into the shaft sleeve 514 of the first fixed seat 51 and can rotate relative to the shaft sleeve 514. The second fixed seat 52 also includes a second locking groove 526 that is provided at the edge of the second accommodating space 521 and surrounds the rotating shaft 524.

[0173] See also Figure 2 The carrier 40, the front rod 22, the rear rod 24, and the first locking mechanism 50 define a four-bar linkage. More specifically, the first pivot point O1 between the rear rod 24 and the first transition piece 26 fixed to the carrier 40, the second pivot point O2 between the front rod 22 and the rear rod 24, the third pivot point O3 between the first fixing seat 51 and the second fixing seat 52, and the fourth pivot point O4 between the second fixing seat 52 and the second transition piece 28 fixed to the carrier 40 form four hinge points of the four-bar linkage.

[0174] See also Figure 6 and Figure 7, the first locking member 53 is accommodated in the accommodation space formed by the cooperation of the first accommodation space 511 and the second accommodation space 521, so as to cooperate with the first locking groove 516 and the second locking groove 526 to achieve locking. A through hole 532 is also formed in the middle of the first locking member 53. The shaft sleeve 514 of the first fixed seat 51 passes through the through hole 532, so that the first locking member 53 can slide back and forth along the shaft sleeve 514 in the accommodation space formed by the cooperation of the first accommodation space 511 and the second accommodation space 521. In this embodiment, the first locking member 53 is a gear, and the first locking groove 516 and the second locking groove 526 are gear grooves meshing with the first locking member 53. It can be understood that in other embodiments, the first locking member 53 can also be other shapes, such as an irregular polygon, etc., and the first locking groove 516 and the second locking groove 526 can be other corresponding shapes accordingly.

[0175] The unlocking member 54 can drive the first locking member 53 to move axially. The unlocking member 54 includes a pressing portion 542 that is roughly circular, and a plurality of pushing portions 544 that extend to one side from the edge of the pressing portion 542. The pressing portion 542 is slidably accommodated in the sliding groove 512 of the first fixed seat 51. In one embodiment, the pressing portion 542 protrudes from the edge of the sliding groove 512, for example, protrudes by about 2.5 mm. In addition, the middle part of the pressing portion 542 may also have a certain depression to facilitate the user to press with his hand. The bottom of the sliding groove 512 is also provided with a plurality of limiting holes 5122. After the plurality of pushing portions 544 pass through the corresponding limiting holes 5122, they abut against the first locking member 53. In order to prevent the pressing portion 542 from detaching from the sliding groove 512, a hook 5442 is also provided at the end of the pushing portion 544. The hook 5442 has a certain elasticity and can abut against the edge of the limiting hole 5122 , thereby preventing the unlocking member 54 from falling off the first fixing seat 51 as a whole when the pressing portion 542 slides in the sliding groove 512 .

[0176] The first elastic member 55 is disposed inside the second fixing seat 52. The two ends of the first elastic member 55 respectively abut against the first locking member 53 and the side of the second fixing seat 52 facing the first fixing seat 51. In this embodiment, the first elastic member is a compression spring, which makes the first locking member 53 have a constant tendency to move toward the first locking groove 516.

[0177] Please also read Figure 6 and Figure 7 , the working principle of the first locking mechanism 50 is briefly described below.

[0178] When the first locking mechanism 50 is in Figure 6 In the locked state shown, the first locking member 53 cooperates with the first locking groove 516 and the second locking groove 526 to achieve locking. At this time, the first fixing seat 51 and the second fixing seat 52 are fixed to each other and cannot rotate relative to each other. Therefore, the frame 20 is also locked in Figure 2 In this state, the overall height of the wheeled mobile device 100 is relatively high, so that it is convenient for the user to push and pull the animal on the carrier 30 to be transferred.

[0179] When the wheeled mobile device 100 needs to be transferred to an ambulance, the frame 20 can be folded up to reduce the height of the wheeled mobile device 100. In this embodiment, when the frame 20 is folded or unfolded, it is not necessary to remove the carrier 30 from the frame 20. At this time, the unlocking members 54 of the two first locking mechanisms 50 can be pressed by hand at the same time, and the multiple pushing parts 544 will resist the first locking member 53 and drive the first locking member 53 to overcome the elastic force of the first elastic member 55 and slide toward the second accommodating space 521. Figure 7 As shown, when the first locking member 53 enters the second accommodating space 521, the first locking member 53 is disengaged from the first locking groove 516. At this time, the first locking mechanism 50 is in an unlocked state, and the first fixing seat 51 can rotate relative to the second fixing seat 52 around the rotating shaft 524.

[0180] like Figure 2 , Figure 8 and Fig. 9 As shown, when the first fixing seat 51 can rotate relative to the second fixing seat 52, the front rod 22 of the frame 20 can also pivot relative to the rear rod 24, and finally the front rod 22 and the rear rod 24 are moved from Figure 2 The cross state shown is closed Fig. 9 The approximately parallel state shown in FIG. Figure 2 In the expanded state shown, switch to Figure 8 The semi-folded state shown, finally enter Fig. 9 The fully folded state is shown, thereby reducing the height and occupied volume of the wheeled mobile device 100.

[0181] In some embodiments, when the frame 20 is in Fig. 9 In the fully folded state shown, the first fixing seat 51 rotates relative to the second fixing seat 52, which may cause the first locking member 53 and the first locking groove 516 and the second locking groove 526 to be misaligned and unable to form a lock. Therefore, in this folded state, the first fixing seat 51 and the second fixing seat 52 may not be locked. In this way, it is more convenient and quick to unfold the frame 20, and there is no need to operate the unlocking member 54, and the carrier 40 can be directly lifted upward.

[0182] When the carrier 40 is lifted upward, the frame 20 is Fig. 9 The fully collapsed state shown is restored to Figure 2In the unfolded state shown in FIG. 1 , under the elastic restoring force of the first elastic member 55, the first locking member 53 slides from the second accommodating space 521 toward the first accommodating space 511, thereby engaging with the first locking groove 516 and the second locking groove 526 again to achieve locking. Figure 6 The front rod 22 and the rear rod 24 of the frame 20 are locked in the locked state. Figure 2 Shown in expanded state.

[0183] It is understood that in another embodiment, when the frame 20 is in Fig. 9 In the fully folded state shown in FIG. 1 , the first locking mechanism 50 can also realize the locking function, thereby locking the front rod 22 and the rear rod 24 in the Fig. 9 At this time, when the frame 20 needs to be unfolded, the unlocking member 54 needs to be manually pressed first. It can be understood that in other embodiments, the unlocking member 54 can drive the first locking member 53 to disengage from the second locking groove 526, thereby realizing the unlocking state of the first locking mechanism 50. In addition, if other components are used to drive the first locking member 53 to move, the unlocking member 54 and the first elastic member 55 can also be omitted.

[0184] It should be noted that the above embodiment locks the relative position of the first fixing seat 51 and the second fixing seat 52 through the first locking mechanism 50, so that the first fixing seat 51 and the second fixing seat 52 cannot rotate relative to each other, and the frame 20 is locked in a certain state. That is, as long as the first locking mechanism 50 is in the locked state, the relative position of the first fixing seat 51 and the second fixing seat 52 is locked, so that the frame 20 is locked in a certain state, which is not limited to the above-mentioned unfolded state and fully folded state, but can also be other folded states between the unfolded state and the fully folded state (such as Figure 8 shown).

[0185] According to the embodiment of the present application, by pressing the unlocking member 54 of the first locking mechanism 50, the frame 20 can be switched between the unfolded state and the folded state, so that the wheeled mobile device 100 is convenient to store when not in use without taking up extra space. Figure 8 and Fig. 9 When the frame 20 is switched to the fully folded state, the upper end of the front rod 22 is close to the lower end of the rear rod 24 , and the upper end of the rear rod 24 is close to the lower end of the front rod 22 .

[0186] like Fig.10 and Fig.11As shown, in this embodiment, the carrier 30 may have a structure similar to a stretcher, which includes a support device and at least one belt guide mechanism 33 disposed on the support device. The support device includes a first support 32, a second support 34, and a support plate 36 located between the first support 32 and the second support 34.

[0187] The first bracket 32 ​​is a substantially annular frame (for example, but not limited to, a rectangular frame), which includes two long sides 321 and two short sides 323 connected to the two long sides 321. It should be noted that in this embodiment, the lengths of the two short sides 323 are not equal. Fig.10 The length of the short side 323 on the right side is slightly smaller than the length of the short side 323 on the left side. Of course, in other embodiments, the lengths of the two short sides 323 may also be equal. The first bracket 32 ​​may be made of a metal material. In one embodiment, the two short sides 323 may also be wrapped with anti-slip materials such as leather or rubber to facilitate the user's grip. The second bracket 34 is roughly the same shape as the first bracket 32, but smaller in size than the first bracket 32. Two parallel support rods 322 are provided between the two long sides of the first bracket 32. Two fixing seats 324 are also provided on each support rod 322.

[0188] The support plate 36 is mainly used to carry pets. It can be made of a rigid material (such as a metal plate, a plastic plate) or a flexible material (such as canvas) according to actual application requirements. The support plate 36 is generally a square flat plate, which is fixed on four fixing seats 324. Fig.13 Specifically, a plurality of positioning seats 333 (more specifically, positioning seats 3332) are provided on the support plate 36 at positions corresponding to the fixing seats 324, and each positioning seat 333 is embedded in the support plate 36. Screws 334 (more specifically, screws 3342) pass through the positioning seats 333 and the fixing seats 324 to fix the support plate 36 to the fixing seats 324. In addition, in order to enhance the bonding strength, a locking washer 3242 cooperating with the screws 334 is further provided on the surface of the fixing seats 324.

[0189] The second bracket 34 includes two long connecting rods (also called long sides) 341 and two short engaging rods (also called short sides) 343. The two connecting rods 341 are fixedly connected to the two supporting rods 322 through the four fixing seats 324. A fixing ring 342 is also provided in the middle of the two connecting rods 341.

[0190] like Fig.12 and Fig.15 As shown, two fixing plates 326 are provided on the second bracket 34. Specifically, the two fixing plates 326 can be respectively fixed to the two engaging rods 343 of the second bracket 34 by welding or the like, and the two fixing plates 326 are arranged opposite to each other. Each belt guide mechanism 33 is fixed to a fixing plate 326 by fasteners such as screws.

[0191] like Figure 10-12 as well as Figure 14-16 As shown, two belt guide mechanisms 33 are respectively arranged on the second bracket 34. Specifically, each belt guide mechanism 33 is arranged in the middle of the engaging rod 343 of the second bracket 34. The belt guide mechanism 33 includes a bottom shell 331 and a surface shell 332. The bottom shell 331 is fixed on the support plate 36, and the surface shell 332 is fixed to the second bracket 34. A plurality of positioning seats 333 are also provided on the support plate 36 corresponding to the position of the belt guide mechanism 33. The bottom shell 331 can be fixed to the positioning seat 333 (more specifically, the positioning seat 3331) by, for example, screws 334 (more specifically, screws 3341). The surface shell 332 has a receiving groove 3322 for accommodating a fixing plate 326. The fixing plate 326 is inserted into the receiving groove 3322 of the surface shell 332 and fixed to the surface shell 332 by a plurality of screws 334 (more specifically, screws 3343). The bottom shell 331 and the surface shell 332 can also be fixedly connected by a plurality of screws. It is understood that in other embodiments, the belt guide mechanism 33 may also be fixed only by the positioning seat 3331 and the support plate 36, and the fixing plate 326 may also be omitted. Similarly, in other embodiments, the belt guide mechanism 33 may also be fixed only by the fixing plate 326 and the second bracket 34, and the positioning seat 3331 may also be omitted.

[0192] like Fig.12 , Fig.14 and Fig.16 As shown, the bottom shell 331 and the top shell 332 together define a restraining belt 513 for fixing the belt assembly (see Fig.14) passes through the channel 330. The channel 330 has a first port 3301 and a second port 3302. The channel 330 also has a lateral introduction port 3303. The lateral introduction port 3303 is connected to the first port 3301 and the second port 3302 at the same time, and the lateral introduction port 3303 has a guiding slope 3304. By providing the lateral introduction port 3303 and the guiding slope 3304, the restraining belt 513 can easily slide into the channel 330 from the side. At least one first convex rib 3311 protruding toward the surface shell 332 is provided on the bottom shell 331. At least one second convex rib 3312 protruding toward the bottom shell 331 is provided on the surface shell 332, and the first convex rib 3311 and the second convex rib 3312 are alternately arranged in the extension direction of the restraining belt 513. That is, the first convex rib 3311 and the second convex rib 3312 are arranged on the side walls opposite to each other in the channel 330. By properly setting the height of the first convex rib 3311 and the second convex rib 3312, the restraining belt 513 between the first port 3301 and the second port 3302 is bent in the channel 330 to bypass the top of the first convex rib 3311 and the top of the second convex rib 3312, so that the restraining belt 513 will be subject to movement resistance from the first convex rib 3311 and the second convex rib 3312. In this way, when the fixing belt assembly is tightened, the restraining belt 513 will not easily slide relative to the bracket device.

[0193] Please refer again Fig.17 In order to realize the rapid assembly and disassembly of the carrier 30, the wheeled mobile device 100 further includes a locking mechanism 60 disposed on the carrier frame 40. The locking mechanism 60 has Fig. 22 The engagement state shown is the same as Fig.23 The carrier 30 is in the unlocked state shown in the figure. When the engaging mechanism 60 is in the engaged state, the carrier 30 is locked with the engaging mechanism 60, that is, the carrier 30 is fixed to the carrier 40; when the engaging mechanism 60 is in the unlocked state, the carrier 30 can be separated from the engaging mechanism 60, so that the carrier 30 can be easily removed from the carrier 40. In this embodiment, the two engaging mechanisms 60 are respectively arranged on two opposite short rods 42 of the carrier 40. In other embodiments, the number of the engaging mechanisms 60 can also be one, three, four or more. In addition, the engaging mechanism 60 can also be arranged on two long rods 44 of the carrier 40.

[0194] See also Figure 18-Figure 20, the locking mechanism 60 includes an upper shell 62, a lower shell 64, a locking member 66 and a second elastic member 68. The upper shell 62 and the lower shell 64 together constitute a shell, and a receiving space 63 for the locking member 66 to slide is formed inside the shell. In this embodiment, the upper shell 62 and the lower shell 64 are assembled together by fasteners such as screws, and are clamped and fixed on the short rod 42. In other embodiments, the upper shell 62 and the lower shell 64 can also be an integrally formed structure. The lower shell 64 is roughly square, and a locking groove 642 is provided on the front thereof. The locking groove 642 is close to the short rod 42 and is arranged along the extension direction of the short rod 42, and the width of the locking groove 642 matches the size of the locking rod 343 of the carrier 30. The locking rod 343 of the carrier 30 can be engaged in the locking groove 642, thereby limiting the movement of the carrier 30 along the Fig. 20 The lower shell 64 is also provided with a limit notch 644 in the middle of one side thereof, which is connected to the slot 642. When the locking rod 343 is received in the slot 642, the belt guide mechanism 33 on the locking rod 343 can be positioned in the limit notch 644, thereby limiting the movement of the carrier 30 along the longitudinal direction L. Fig. 20 The lower shell 64 is also provided with an operation slot 646 connected to the receiving space 63 on the back. The upper shell 62 covers the lower shell 64, and a through hole 622 (see FIG. 6 ) is formed between the upper shell 62 and the lower shell 64 to connect the receiving space 63 and the slot 642. Fig. 22 ).

[0195] The shape of the engaging member 66 is roughly a square plate (for example, but not limited to a rectangular plate), which includes an integrally formed tongue 662 and an operating portion 664. The tongue 662 is roughly a square piece that matches the shape of the through hole 622. One end of the tongue 662 has a guiding slope 6622 that contacts the engaging rod 343. The engaging member 66 can slide in the receiving space 63 of the shell, and the tongue 662 can pass through the through hole 622 and enter the slot 642. The thickness of the operating portion 664 is greater than the thickness of the tongue 662, and the operating portion 664 can move in the operating slot 646, thereby driving the tongue 662 to pass through the through hole 622 or retract into the receiving space 63. In other words, the operating portion 664 can drive the tongue 662 to move between a first position extending into the slot 642 and a second position exiting the slot 642. A accommodating cavity 6642 is also provided on the side of the operating portion 664 away from the tongue 662 (see Fig. 22 ). In this embodiment, Fig. 20 As shown, the locking slot 642 is located on the inner side of the short rod 42 , and the operating portion 664 is located on the outer side of the short rod 42 , so that the design of the locking structure 60 is more reasonable and the unlocking operation is more convenient.

[0196] See also Fig. 22, the second elastic member 68 is a compression spring in this embodiment. The second elastic member 68 is partially accommodated in the accommodating chamber 6642. The two ends of the second elastic member 68 are respectively against the inner side wall of the lower shell 64 and the inner wall of the operating portion 664 located at one end of the accommodating chamber 6642. The second elastic member 68 has a constant tendency to move the engaging member 66 toward the slot 642. In other words, in the initial state, the second elastic member 68 keeps the latch tongue 662 in the first position extending into the slot 642.

[0197] See also Figure 21-23 The working principle of the locking mechanism 60 is briefly described below.

[0198] In such Fig.18 In the initial state shown, under the action of the second elastic member 68 , the latching tongue 662 of the engaging member 66 passes through the through hole 622 and is in the first position extending into the latching groove 642 .

[0199] When the carrier 30 needs to be fixed on the carrier frame 40, the two engaging rods 343 of the carrier 30 can be respectively inserted into the two slots 642 of the two engaging mechanisms 60. In the process of the engaging rod 343 entering the slot 642, the engaging rod 343 will first contact the latch tongue 662. Under the action of the guiding inclined surface 6622 of the latch tongue 662, the engaging rod 343 can push the latch tongue 662 into the through hole 622, so that the engaging rod 343 can smoothly enter the slot 642. After the engaging rod 343 passes over the latch tongue 662 and enters the slot 642, under the action of the second elastic member 68, the latch tongue 662 again passes through the through hole 622 and extends into the slot 642, and abuts against the top of the engaging rod 343. When the engaging mechanism 60 is in this engaged state, under the action of the two side walls of the slot 642, the engaging rod 343 moves along the slot 642. Fig. 20 The movement of the middle carrier 30 in the length direction L is restricted. The belt guide mechanism 33 on the locking rod 343 is just positioned within the limiting notch 644, so that the locking rod 343 moves along the Fig. 20 The movement of the middle carrier 30 in the width direction W is restricted. Under the action of the bottom wall of the slot 642 and the latch tongue 662, the latch rod 343 moves along Fig. 20 The movement of the middle carrier 30 in the height direction H is restricted. Fig. 20 As shown, the carrier 30 is relatively firmly mounted on the carrier frame 40 .

[0200] In this embodiment, by adopting the structure in which the limiting notch 644 cooperates with the belt guide mechanism 33 and the clamping slot 642 cooperates with the clamping rod 343, the carrier 30 can be fixed on the carrier frame 40 more stably and will not shake with the movement of the frame 20. In addition, in some embodiments, the clamping slot 642 is arranged on the inner side of the short rod 42, so that the distance between the two clamping rods 343 of the carrier 30 is smaller than the distance between the two short rods 42 of the carrier frame 40, thereby ensuring that the projection of the second bracket 34 on the ground is located within the projection of the carrier frame 40 on the ground, so that the carrier 30 is placed on the carrier frame 40 More stable, rollover is prevented, and the safety of the pet is guaranteed.

[0201] When the carrier 30 needs to be removed from the carrier 40, the user can reach into the operating slot 646 by hand and apply a force to the operating portion 664 to move it away from the slot 642. The operating portion 664 overcomes the elastic force of the second elastic member 68, thereby driving the latch tongue 662 to move from the first position of inserting into the slot 642 to the second position of exiting the slot 642, and finally retracting into the receiving space 63. When the locking mechanism 60 is in the unlocked state, there is no obstruction of the latch tongue 662 above the locking rod 343, so the locking rod 343 can be easily removed from the slot 642, that is, the carrier 30 is separated from the locking mechanism 60. After the force on the operating portion 664 stops, the latch tongue 662 passes out of the through hole 622 under the elastic restoring force of the second elastic member 68, and enters the first position of inserting into the slot 642 again.

[0202] It is understood that the operating slot 646 can also be provided on the upper shell 62. In addition, if the movement of the engaging member 66 is directly controlled by hand, the guiding inclined surface 6622 and the second elastic member 68 can also be omitted. If the belt guiding mechanism 33 is not provided on the engaging rod 343, the limiting notch 644 can also be omitted.

[0203] In another embodiment, Fig.24 As shown, located Fig.21 The width of the slot 642 of the locking mechanism 60 on the short rod 42 on at least one side is greater than the diameter of the locking rod 343, so that when the locking rod 343 is located in the slot 642, the locking rod 343 can move in the slot 642 along the length direction of the carrier 30. Specifically, the locking rod 343 has a third position (such as 400) close to the latch tongue 662 in the slot 642. Fig.24 ) and a fourth position away from the latch tongue 662 (eg Fig.25), the third position and the fourth position may be the positions of the left and right ends of the slot 642. When the locking rod 343 is in the third position, the latching tongue 662 of the locking member 66 is located directly above the locking rod 343, so that the locking rod 343 can be fixed in the slot 642; when the locking rod 343 is in the fourth position, the locking rod 343 is separated from the latching tongue 662, that is, it is no longer blocked by the latching tongue 662. In addition, when the latching tongue 662 of the locking member 66 is in Fig.24 and Fig.25 In the first position shown, the distance H1 between the latch tongue 662 and a side wall of the slot 642 is greater than the size (more specifically, the diameter) D of the engaging rod 343. It can be understood that if the cross-section of the engaging rod 343 is non-circular, such as square, triangle, etc., the distance H1 between the latch tongue 662 and a side wall of the slot 642 is greater than the size (more specifically, the width) D of the engaging rod 343.

[0204] When the carrier 30 is normally fixed on the carrier frame 40, since the distance between the two engaging rods 343 of the carrier 30 matches the distance between the two engaging slots 642 of the engaging mechanism 60 on both sides, the engaging rods 343 on both sides are respectively located at the third position (such as Fig.24 ), at this time, the latch tongue 662 of the latch member 66 is located directly above the latch rod 343, so that the latch rods 343 on both sides can be fixed in the latch groove 642. When the carrier 30 needs to be removed from the carrier frame 40, only the unlocking Fig.21 The locking mechanism 60 shown is located on the right short rod 42, without unlocking the locking mechanism 60 located on the left short rod 42. When the locking rod 343 on the right is disengaged from the slot 642 on the right, the carrier 30 can be directly dragged to the right, so that the locking rod 343 on the left moves in the slot 642 on the left. When the locking rod 343 on the left moves from the third position in the slot 642 to the fourth position, the locking rod 343 is separated from the latch tongue 662, and because the distance H1 between the latch tongue 662 and the side wall of the slot 642 is greater than the diameter D of the locking rod 343, the locking rod 343 is no longer blocked by the latch tongue 662, so the locking rod 343 can be more conveniently removed from the slot 642, thereby realizing the separation of the carrier 30 and the locking mechanism 60. The above-mentioned embodiment can omit the operation step of unlocking the locking mechanism 60 located on the left short rod 42, so that the entire operation is more convenient and quick. It can be understood that in other embodiments, the locking rod 343 located on the left short rod 42 can be removed from the slot 642. Fig.21 The width of the slot 642 of the locking mechanism 60 on the left and right sides (at N2 and N1) can also be greater than the diameter of the locking rod 343 at the same time. At this time, it is only necessary to unlock the locking mechanism 60 on either side to separate the carrier 30 from the locking mechanism 60, so that the user can easily remove the carrier 30 from the frame 20 on either side.

[0205] See also Figure 26-Figure 27According to an embodiment of the present application, the wheeled mobile device 100 and Figure 1-Figure 3 The structures of the wheeled mobile devices 100 are substantially the same, including a wheel assembly 10, a frame 20, a carrier (not shown), a support frame 40, and a first locking mechanism 50. The difference is that the structure of the frame 20 is changed.

[0206] like Figure 28-Figure 30 As shown, the wheel assembly 10 includes a front wheel assembly 12 and a rear wheel assembly 14. The frame 20 includes a front rod 22 connected to the front wheel assembly 12 and a rear rod 24 connected to the rear wheel assembly 14. The two front rods 22 are arranged outside the two rear rods 24, that is, the distance between the two front rods 22 is greater than the distance between the two rear rods 24. The frame 20 also includes a pivot seat 27. The middle part of the front rod 22 and the middle part of the rear rod 24 are pivotally connected to each other through the pivot seat 27 (the "middle" here is any position between the two ends, not the midpoint in a strict sense).

[0207] like Fig.31 and Fig.32 As shown, the pivot seat 27 includes a first seat body 272 and a second seat body 274. The first seat body 272 and the second seat body 274 have exactly the same structure and face opposite directions. A snap-fitting groove 276 is provided on the first seat body 272 or the second seat body 274. The front rod 22 and the rear rod 24 can be snap-fitted into the corresponding snap-fitting grooves 276 of the first seat body 272 and the second seat body 274, respectively, so that the first seat body 272 is fixedly connected to the front rod 22, and the second seat body 274 is fixedly connected to the rear rod 24. Axial holes are provided on the first seat body 272 and the second seat body 274, and a pin shaft (not shown) is passed through the axial hole, so that the first seat body 272 and the second seat body 274 can rotate relative to each other. As shown Fig.30 As shown, by providing the first seat body 272 and the second seat body 274, the lateral distance between the front rod 22 and the rear rod 24 is increased. Fig.26 The expanded state shown is Fig.33 When the folded state is switched, the front rod 22 and the rear rod 24 are folded from the crossed state to the approximately parallel state, and the sufficient lateral distance between the front rod 22 and the rear rod 24 can prevent the user's fingers from being accidentally pinched, thereby further improving the safety of the product. It can be understood that the structures of the first seat body 272 and the second seat body 274 can also be different. In addition, in other embodiments, the pivot seat 27 can also be a single component, that is, the first seat body 272 and the second seat body 274 are integrally formed. At this time, the front rod 22 and the rear rod 24 are respectively pivotally connected to the pivot seat 27 through a pin shaft or the like.

[0208] The support frame 40 is pivotally connected to the front rod 22 and the rear rod 24 respectively. The first locking mechanism 50 is disposed between the frame 20 and the support frame 40. Specifically, the first locking mechanism 50 is disposed on the front rod 22. Figure 4 , Figure 5 The structure of the first locking mechanism 50 shown is relatively similar, so it will not be described in detail. Figure 27-Figure 28 As shown, in this embodiment, the frame 20 further includes a first transition piece 26 and a second transition piece 28 fixed to the carrier frame 40. One end of the first transition piece 26 is inserted into and fixed to the cross frame 43, and the other end of the first transition piece 26 is pivotally connected to the rear rod 24. One end of the second transition piece 28 is fixed to the long rod 44 by screws or welding, and the other end of the second transition piece 28 is pivotally connected to the first locking mechanism 50.

[0209] like Fig.30 and Fig.33 As shown in FIG. 1 , since the first locking mechanism 50 is located at the outermost side of the frame 20, when the unlocking member 54 is operated to unlock the wheeled mobile device 100 from Fig.26 The expanded state shown is Fig.33 When switching between the folded states, the unlocking member 54 and the rear rod 24 can be prevented from being pinched due to the small gap between them. At the same time, it can also be prevented from being pinched due to the small gap between the first locking mechanism 50 and the rear reinforcing rod 25 when the first locking mechanism 50 is located on the inner side of the frame 20.

[0210] In order to control the traveling direction of the wheeled mobile device 100 and fix the wheeled mobile device 100 at a specific position. The wheeled mobile device 100 of this embodiment is also provided with a brake mechanism. The brake mechanism can be provided on the front wheel assembly 12 alone, or on the rear wheel assembly 14 alone, or on both the front wheel assembly 12 and the rear wheel assembly 14. The following description is made by taking the brake mechanism provided on the front wheel assembly 12 as an example.

[0211] See also Figure 34-Figure 35 The wheel assembly 10 includes an adapter 11, a wheel seat 13, a caster 15 and a brake assembly 17. The adapter 11 is fixed to the end of the front rod 22. The wheel seat 13 is pivotally connected to the adapter 11. The caster 15 is pivotally connected to the wheel seat 13. The brake assembly 17 can simultaneously limit the rotation of the wheel seat 13 relative to the adapter 11 and limit the rotation of the caster 15 relative to the wheel seat 13, thereby achieving the braking and direction locking of the caster 15.

[0212] See also Figure 36-Figure 37 The wheel assembly 10 also includes a universal shaft 112 fixed to the adapter seat 11. The wheel seat 13 is sleeved on the universal shaft 112 and can rotate relative to the universal shaft 112, so that the caster 15 can rotate in all directions. The end of the universal shaft 112 is fixed with a toothed disc 114 (see Fig.42). The rotation of the toothed disc 114 relative to the axis of the universal shaft 112 is restricted. The top of the wheel seat 13 is provided with adjacent first pivot holes 132 and second pivot holes 134. The bottom of the wheel seat 13 is also provided with a third pivot hole 136. The caster 15 is pivotally connected to the third pivot hole 136 through a pin 152 and a fastener 154, so that the caster 15 can roll on the ground.

[0213] The brake assembly 17 includes a pedal 172 and a brake spring 174. The pedal 172 is pivotally connected to the first pivot hole 132 of the wheel seat 13 through a pin 1772. The brake spring 174 is pivotally connected to the second pivot hole 134 of the wheel seat 13 through a pin 1742.

[0214] like Fig.38 and Fig.39 As shown, the brake spring piece 174 is generally an arc-shaped piece, which includes a main body 1744, a pivoting part 1746 disposed in the middle of the main body 1744, and a latching tooth 1743 and a brake part 1745 disposed at both ends of the main body 1744. The pin 1742 passes through the pivoting part 1746 and cooperates with the second pivot hole 134, so that the brake spring piece 174 can rotate at a certain angle relative to the wheel seat 13. The latching tooth 1743 can mesh with the toothed disc 114 on the adapter seat 11, so that the wheel seat 13 and the adapter seat 11 are fixed. When the latching tooth 1743 is disengaged from the toothed disc 114, the wheel seat 13 can rotate freely relative to the adapter seat 11. The brake part 1745 can abut against the caster 15, thereby forming a braking effect. In some embodiments, a plurality of protrusions 1748 can also be provided on the side of the brake part 1745 facing the caster 15. The protrusion 1748 can be stuck into the texture on the surface of the caster 15, thereby further enhancing the braking effect. A reset spring 1747 that is tilted upward is also formed in the middle of the brake spring 174. The reset spring 1747 always abuts against the inner wall of the wheel seat 13.

[0215] The pedal 172 can rotate at a certain angle relative to the wheel seat 13, thereby having Fig.34 , Fig.35 The horizontal state and Fig.40 , Fig.41 The tilted state shown. Fig.36 As shown in FIG. 1 , when the pedal 172 is in a horizontal state, the pedal 172 contacts the brake spring 174. The brake spring 174 is in a Fig.36 The first state is shown. At this time, the locking teeth 1743 of the brake spring 174 and the toothed disc 114 are not engaged, and the brake portion 1745 of the brake spring 174 and the caster 15 are separated. In this state, the wheel seat 13 can rotate freely relative to the adapter 11, and the caster 15 can rotate freely forward and backward relative to the wheel seat 13.

[0216] When braking is required, the pedal 172 can be stepped on by the foot to move the pedal 172 from Fig.35 The horizontal state shown switches to Fig.41 The tilted state shown. Fig.42 As shown, during this process, the pedal 172 gradually applies a force to the brake spring 174 to rotate clockwise around the second pivot hole 134, the latching tooth 1743 is lifted up and approaches the toothed disc 114, and the brake portion 1745 is lowered and approaches the caster 15. Fig.41 In the tilted state shown, the brake spring 174 is in Fig.42 The second state is shown. At this time, on the one hand, the latch tooth 1743 is engaged with the toothed disc 114, and on the other hand, the brake part 1745 is against the caster 15. The brake spring 174 and the pedal 172 are against each other at this time to keep the pedal 172 in an inclined state. When the latch tooth 1743 is engaged with the toothed disc 114, the wheel seat 13 and the adapter seat 11 are fixed and cannot rotate freely, thereby locking the rotation direction of the wheel seat 13 relative to the adapter seat 11 to achieve the rotation orientation of the caster 15. When the brake part 1745 and the caster 15 are against each other, the friction between the two also causes the caster 15 to slow down and eventually stop rotating, that is, the rotation of the caster 15 is locked, thereby achieving the dual effects of rotation orientation and braking. At this time, the wheeled mobile device 100 can stay stably on flat ground or slopes to facilitate medical staff to transfer and place the animals on the carrier 30.

[0217] When the wheeled mobile device 100 no longer needs to stay, the pedal 172 can be lifted up by the foot or the other end of the pedal 172 can be stepped on to move the pedal 172 from the upper side to the lower side. Fig.41 The tilt state shown switches to Fig.35 The brake spring 174 then returns to the horizontal state shown in FIG. Fig.36 The first state is shown. When the pedal 172 stops applying force to the brake spring piece 174, the brake spring piece 174 will rotate counterclockwise around the second pivot hole 134 under the action of the reset spring piece 1747, so that the locking teeth 1743 of the brake spring piece 174 are disengaged from the toothed disc 114, and the brake portion 1745 of the brake spring piece 174 no longer abuts against the caster 15. At this time, the wheel seat 13 can rotate freely relative to the adapter seat 11, and the caster 15 can rotate freely forward and backward relative to the wheel seat 13.

[0218] See also Fig.44 According to another embodiment of the present application, the carrier 30 and Fig.10 The carrier 30 shown is substantially the same, including a first bracket 32, a second bracket 34 (see Fig.48 ), and a support plate 36 located between the first bracket 32 ​​and the second bracket 34. The difference is that, Fig.44 The illustrated carrier 30 also includes a carrying cloth 37 covering the support plate 36 .

[0219] See also Fig.45The carrying cloth 37 includes a main body 372 and at least one handle 374 arranged at the edge of the main body 372. The length of the main body 372 is substantially the same as the length of the support plate, and the width of the main body 372 is greater than the width of the support plate 36. The material of the main body 372 can be canvas or the like. Two handles 374 are respectively arranged on the two long sides of the main body 372 to facilitate the user to apply force with both hands at the same time. When it is necessary to carry a large pet to the support plate 36 of the carrier 30, or to move it off the support plate 36, two users can stand on both sides of the carrying cloth 37, and each person can hold a handle 374 with both hands at the same time, so that the pet can be easily lifted and transported to a designated location. In addition, when the carrying cloth 37 is arranged on the support plate 36, the four handles 374 can be folded up, or fixed to the bottom of the support plate 36 by Velcro or the like, so as to prevent the carrying cloth 37 from sliding freely relative to the support plate 36 and improve the appearance of the carrier 30.

[0220] In this embodiment, the carrying cloth 37 and the support plate 36 are independently provided, that is, the carrying cloth 37 can be laid on the support plate 36 without being fixed. It can be understood that the carrying cloth 37 can also be fixed on the support plate 36 to prevent the carrying cloth 37 from sliding off the support plate 36. For example, in one embodiment, the left and right ends of the carrying cloth 37 are respectively provided with a pocket-shaped fixing portion 376. The fixing portion 376 can be sleeved on the edge of the support plate to achieve rapid fixing of the carrying cloth 37 and the support plate. Of course, in other embodiments, Velcro-like fixing devices can also be correspondingly provided on the carrying cloth 37 and the support plate 36 to facilitate rapid fixing of the two. In addition, in other embodiments, the support plate 36 can also be covered with a base cloth, and the carrying cloth 37 is arranged on the base cloth.

[0221] See also Fig.46 In another embodiment, the four handles 374 are not disposed on opposite sides of the main body 372 , but are disposed at positions adjacent to the four corners of the main body 372 .

[0222] See also Fig.47 According to another embodiment of the present application, the carrier 30 and Fig.44 The carrier 30 shown is substantially the same, including a first bracket 32, a second bracket 34 (see Fig.35), and a support plate 36 located between the first bracket 32 ​​and the second bracket 34. The support plate 36 is also covered with a base fabric 39. The difference is that in order to restrain the pet more firmly on the carrier 30, the carrier 30 also includes a restraining device. In this embodiment, the restraining device includes a restraining belt 38 arranged on the base fabric 39 or the support plate 36. The restraining device may also include one, two or more restraining belts 38. In this embodiment, the restraining device includes three restraining belts, and the three restraining belts 38 are arranged in parallel and at intervals, and extend along the width direction of the support plate 36. It can be understood that in another embodiment, the carrier 30 also includes a carrying cloth or a protective cover (not shown) covering the base fabric 39, and the restraining device is arranged on the carrying cloth.

[0223] like Fig.48 As shown, the two ends of each restraint belt 38 pass through the buckle 362 set on the base fabric 39 or the support plate 36, so that the length of the restraint belt 38 on the front of the base fabric 39 can be adjusted to accommodate pets of different sizes. In other embodiments, the buckle 362 can also be set on the bracket device, or on the carrying cloth. The buckle 362 can be a Japanese buckle, a strap buckle, a locking ring, etc. In one embodiment, the locking ring is a double ring, and the free end of the restraint belt 38 can be inserted from one ring and then passed through the other ring. The length of the restraint belt 38 can be adjusted by pulling the free end of the restraint belt 38, which is easy to operate. In addition, the double ring structure can also increase the connection strength.

[0224] After the pet is placed on the base fabric 39, the lengths of the three left, middle and right restraint straps 38 can be adjusted to stabilize the pet on the support plate 36 to prevent the pet from moving arbitrarily and falling out of the carrier 30. Then the carrier 30 can be lifted up one after the other to move the pet to a designated location.

[0225] See also Fig.49 According to another embodiment of the present application, a wheeled mobile device 200 includes a frame, a card seat assembly 70 and a carrier 30. The structure of the carrier 30 of this embodiment is similar to that of the aforementioned embodiment. Fig.10 The structure of the carrier 30 is the same as that of the vehicle frame, and will not be described in detail here. The frame of this embodiment has a structure similar to that of a cart, including a front rod 22, a rear rod 24, an upper rod 21, an armrest 29, and a wheel assembly 10. The holder assembly 70 is installed on the frame, and the carrier 30 can be locked and unlocked. By operating the holder assembly 70, the user can easily and stably install the carrier 30 on the frame, or remove it from it. The carrier 30 of the above embodiment has multiple usage modes, and can not only be used with a mobile bracket (such as Fig.17 The invention can be used in combination with the wheeled mobile device shown in the figure, and can also be used in combination with a cart. It greatly meets the diverse needs of transporting different pets and has a wide range of applications.

[0226] See also Figure 50-Figure 53 According to an embodiment of the present application, the carrier 1000 includes a support device 300, a base fabric 700, a mesh fabric 800, and a buckle assembly. Any two of the base fabric 700, the mesh fabric 800, and the support device 300 are detachably connected through the buckle assembly. The base fabric 700 is disposed on the support device 300, and the mesh fabric 800 is disposed on the base fabric 700. A storage space is formed between the base fabric 700 and the mesh fabric 800 for accommodating pets or other items.

[0227] See also Fig.51 and Fig.52 The support device 300 includes a first support 32, a second support 34, and a support plate 36 located between the first support 32 and the second support 34. Furthermore, the support plate 36 can be disposed on the first support 32 and / or the second support 34.

[0228] The first bracket 32 ​​is a roughly annular square frame (for example, but not limited to a rectangular frame), which includes two long sides 321 and two short sides 323 connected to the two long sides 321. Two parallel support rods 322 are provided between the two long sides 321 of the first bracket 32. Two fixing seats 324 are also provided on each support rod 322. The shape of the second bracket 34 is roughly the same as that of the first bracket 32, but the size is smaller than that of the first bracket 32. The second bracket 34 includes two long sides C341 and two short sides C343. The two long sides C341 are fixedly connected to the two support rods 322 through the four fixing seats 324. A fixing ring 342 is also provided in the middle of the two long sides C341.

[0229] The two belt guide mechanisms 33 are respectively arranged on the second bracket 34 and / or the supporting plate 36. Specifically, each belt guide mechanism 33 is arranged in the middle of the short side C343 of the second bracket 34. It can be understood that in other embodiments, the second bracket 34 can also be omitted.

[0230] The support plate 36 is a generally square plate (for example, but not limited to, a rectangular plate), which is fixed to the two support rods 322 by fasteners such as screws. The support plate 36 can be made of a rigid material (for example, a metal plate, a plastic plate) and / or a flexible material (for example, a canvas) according to actual application requirements, or made of a flexible material coated with a rigid material. In this embodiment, the support plate 36 can be selected from a metal plate coated with a flexible material, but is not limited thereto.

[0231] The base fabric 700 covers the support plate 36 and is fixed to the support plate 36. The base fabric 700 includes a plurality of fixing mechanisms fixedly connected to the support plate 36. Specifically, Fig.51 and Fig.53As shown, the base fabric 700 includes a main body 710. The main body 710 is roughly square (for example, but not limited to a rectangle), and its area and shape are similar to the support plate 36. The edge of the main body 710 is provided with a plurality of Velcro 7102, and the bearing surface of the support plate 36 is correspondingly provided with a plurality of Velcro 363. Through the bonding effect of the Velcro 7102 and the Velcro 363, the base fabric 700 can be more firmly covered on the support plate 36. It can be understood that in other embodiments, the Velcro 7102 and 363 can also be replaced by hooks and fixing rings that cooperate with each other, belts and positioning rings that cooperate with each other, snaps that cooperate with each other, strap buckles that cooperate with each other, and similar structures. Of course, the base fabric 700 and the support plate 36 can also be positioned by sewing.

[0232] like Fig.52 and Fig.53 As shown, the base fabric 700 also includes two first fixing parts 720. The two first fixing parts 720 are respectively arranged at the two ends of the main body 710, that is, at the two short sides of the main body 710. Each first fixing part 720 has a structure similar to a pocket, which can be sleeved on one end of the support plate 36, that is, sleeved on the short side of the support plate 36. It can be understood that in other embodiments, the first fixing part 720 and the support plate 36 can also be provided with a hook and a fixing ring that match each other, a belt and a positioning ring that match each other, a Velcro that match each other, or a snap that match each other, so as to enhance the binding force between the two. Of course, the first fixing part 720 and the support plate 36 can also be positioned by sewing.

[0233] like Fig.51 and Fig.53 As shown, the base fabric 700 further includes two second fixing portions 730. The two second fixing portions 730 are respectively disposed on both sides of the main body 710, that is, at the two long sides of the main body 710. The second fixing portions 730 can wrap around and be fixed on the two long sides 321 of the first bracket 32. Specifically, as shown in FIG. Fig.53 and Fig.54 As shown, the second fixing portion 730 is provided with a Velcro 7302. The edge of the bottom of the support plate 36 is also provided with a Velcro 361. After the second fixing portion 730 passes around the long side 321 of the first bracket 32, it is fixed to the long side 321 by the bonding effect of the Velcro 7302 and the Velcro 361. It can be understood that in other embodiments, the Velcro 7302 and 361 can also be replaced by a hook and a fixing ring that match each other, a belt and a positioning ring that match each other, a snap button that match each other, a strap buckle, or a similar structure. Of course, the second fixing portion 730 and the support plate 36 can also be positioned by sewing.

[0234] like Fig.55As shown, in some embodiments, the base fabric 700 further includes four fixing straps 770 located at the four corners of the main body 710. The connection position of each fixing strap 770 with the main body 710 is close to the four corners of the main body 710, that is, within the protection scope of the present application. In some embodiments, the connection position of each fixing strap 770 with the base fabric 700 is on the second fixing portion 730. In some embodiments, the connection position of each fixing strap 770 with the base fabric 700 is on the main body 710.

[0235] Each fixing belt 770 is provided with a seventh fixing portion 774. A plurality of positioning pieces 362 and positioning rings 364 connected to the positioning pieces 362 are provided on the support plate 36. The positioning pieces 362 can be fixed to the support plate 36 by sewing or the like, for example. More specifically, the positioning pieces 362 are fixed to the bottom surface of the support plate 36. The belt guide mechanism 33 corresponds to the middle position of the bottom surface of the support plate 36, and the belt guide mechanism 33 is close to the short side of the support plate 36. The structure of the belt guide mechanism 33 can refer to the present application. Fig.12 , Figures 14 to 16 The structure of the belt guiding mechanism 33, more specifically, the belt guiding mechanism 33 includes a bottom shell 331 and a surface shell 332. The bottom shell 331 is fixed on the support plate 36, and the surface shell 332 is fixed to the second bracket 34. Two positioning pieces 362 are respectively located on both sides of the belt guiding mechanism 33. That is, positioning pieces 362 are respectively arranged on both sides of each belt guiding mechanism 33. Two positioning rings 364 are respectively movably arranged at the ends of the two positioning pieces 362. More specifically, the two positioning rings 364 are arranged at the ends of the two positioning pieces 362 that are away from each other. In this embodiment, the positioning rings 364 can be double rings, and the seventh fixing part 774 is Velcro. The double rings of the positioning ring 361 include a first ring and a second ring. After the fixing belt 770 passes through the first ring, it is wrapped around the second ring, and then passes through the first ring in the opposite direction, and then is fixed to itself through the Velcro of the seventh fixing part 774 (see Fig.55 ). Through the bonding effect of the Velcro, the base fabric 700 and the support plate 36 can be more firmly fixed. It can be understood that the seventh fixing portion 774 can also include mechanisms such as snaps that cooperate with each other, hooks and rings that cooperate with each other.

[0236] like Fig.53 and Fig.55As shown, the base fabric 700 also includes a plurality of first connecting straps 740 extending outward from the edge of the main body 710. The buckle assembly includes a first buckle assembly 900. Specifically, one end of the plurality of first connecting straps 740 is fixed to the four corners of the main body 710 by sewing or the like, and the other end of the plurality of first connecting straps 740 extends outward. The connection position of each first connecting strap 740 with the base fabric 700 is close to the four corners of the main body 710, that is, within the protection scope of the present application. In some embodiments, the connection position of each first connecting strap 740 with the base fabric 700 is on the second fixing portion 730. In some embodiments, the connection position of each first connecting strap 740 with the base fabric 700 is on the main body 710.

[0237] Each first connecting belt 740 is used to connect with the corresponding first buckle assembly 900. In the present embodiment, each first connecting belt 740 is respectively arranged at one end of the fixing belt 770, thereby improving the connection strength of the first connecting belt 740. Specifically, in some embodiments, each first connecting belt 740 and the corresponding fixing belt 770 can be integrally formed, and the middle section is sewn to the four corners of the main body 710. In other embodiments, the fixing belt 770 can be formed by extending outward from the edge of the main body 710 (the fixing belt 770 is also formed by extending outward from the edge of the second fixing part 730 within the protection scope of the present application), and the first connecting belt 740 is sewn to the main body 710 or the second fixing part 730 at a position corresponding to the fixing belt 770, and extends in a direction opposite to the extension direction of the fixing belt 770.

[0238] like Fig.56 As shown, the shape of the mesh 800 is roughly square (for example, but not limited to, rectangular). The two long sides of the mesh 800 are detachably connected to the two second fixing parts 730 located on both sides of the base fabric 700 through the first buckle assembly 900, so as to facilitate the loading of items into the accommodating space. The two short sides of the mesh 800 are also provided with mesh fixing parts 820 respectively. The shape of the mesh fixing part 820 matches the shape of the two short sides of the support plate 36, and has a structure similar to a pocket, which can be sleeved on the end corresponding to the short side of the support plate 36, for example, sleeved on the first fixing part 720 of the base fabric 700.

[0239] At least one adjusting belt 860 is also provided on the mesh 800. In this embodiment, the number of the adjusting belts 860 is three. The three adjusting belts 860 are arranged in parallel and extend along the width direction of the mesh 800. It can be understood that in other embodiments, the number of the adjusting belts 860 can also be one, two, four or more. Each adjusting belt 860 includes a fixed section 8602 and a separating section 8604 connected to each other. The fixed section 8602 is fixed to the mesh 800 by sewing or the like, and the separating section 8604 is not fixed to the mesh 800, that is, it is in a separated state. A strap buckle 8601 is also fixed at the end of the fixed section 8602, and the end 8603 of the separating section 8604 passes through the strap buckle 8601 and can slide back and forth relative to the strap buckle 8601. The available length of the separating section 8604 can be adjusted by the strap buckle 8601, thereby adjusting the size of the accommodation space formed by the base fabric 700 and the mesh 800 to match the size of the pet loaded.

[0240] The edge of the mesh 800 is also provided with a plurality of second connecting belts 840 extending outward. In the present embodiment, each second connecting belt 840 is respectively arranged at one end of the adjusting belt 860. Specifically, in some embodiments, each second connecting belt 840 and the corresponding adjusting belt 860 can be integrally formed, that is, each second connecting belt 840 is respectively formed by extending outward from the edge of the fixed section 8602 and the separating section 8604. In other embodiments, the second connecting belt 840 can also be sewn to the edge of the fixed section 8602 and the separating section 8604, and extend in a direction away from the mesh 800. Since the second connecting belt 840 is not directly connected to the mesh 800, but connected to the adjusting belt 860, when the second connecting belt 840 is subjected to tension, the tension can be transmitted to the adjusting belt 860 to disperse the force on the mesh 800, so as to avoid deformation or tearing of the mesh 800 due to excessive force.

[0241] See also Fig.57 One end of the first fastener assembly 900 is fixedly connected to the base fabric 700 through the first connecting belt 740 , and the other end of the first fastener assembly 900 is movably connected to the mesh fabric 800 through the second connecting belt 840 .

[0242] For details, please refer to Figure 58-Figure 61, the first buckle assembly 900 includes a buckle body 920 and a locking piece 940. The buckle body 920 is shaped similar to a Japanese buckle, and a first connecting hole 922 and a second connecting hole 924 are arranged in parallel on the buckle body 920. The first connecting hole 922 and the second connecting hole 924 are both long holes, and the first connecting hole 922 and the second connecting hole 924 are separated by a support rod 926. The first connecting hole 922 is a fully enclosed hole, and one end of the first connecting belt 740 is provided with a first ring 742 that passes through the first connecting hole 922 and is fixedly connected to the buckle body 920. The edge of the second connecting hole 924 is also provided with a channel 923 that communicates with the outside world. One end of the second connecting belt 840 is provided with a second ring 842 that passes through the channel 923 to enter the second connecting hole 924. When the second ring 842 enters the second connecting hole 924, the second connecting belt 840 is connected to the buckle body 920, thereby achieving the fixation of the mesh 800 and the base fabric 700; when the second ring 842 passes through the channel 923 and separates from the second connecting hole 924, the second connecting belt 840 is separated from the buckle body 920, thereby achieving the separation of the mesh 800 and the base fabric 700.

[0243] In some embodiments, the edge of the first connection hole 922 of the buckle body 920 may also be provided with a channel communicating with the outside, and the channel may also be closed or opened by the corresponding locking member 940, so as to allow the second ring 842 to enter and lock the buckle body 920 or allow the second ring 842 to leave the buckle body 920. In some embodiments, the buckle body 920 may be S-shaped.

[0244] like Fig.59 As shown, the shape of the locking member 940 is roughly a square sleeve. A receiving groove 942 for the support rod 926 to pass through is provided in the locking member 940. The locking member 940 is slidably arranged on the support rod 926 and can move between a first position closing the channel 923 and a second position opening the channel 923.

[0245] See also Fig.59 The locking member 940 is generally U-shaped. The locking member 940 includes two opposite side walls 9401 and 9402, and the end of at least one of the side walls 9401 and 9402 may be provided with a clamping platform 9403 protruding toward the inside of the U-shaped structure. The side walls 9401 and 9402 may be elastically opened so that the support rod 926 may enter the inside of the receiving groove 942 or move out of the receiving groove 942. When the support rod 926 enters the receiving groove 942, the side walls 9401 and 9402 are reset, and the clamping platform 9403 abuts against the support rod 926, and the clamping platform 9403 may prevent the support rod 926 from accidentally leaving the receiving groove 942.

[0246] See also Fig.59 and Fig.60In this embodiment, the first buckle assembly 900 further includes an elastic member 960 located in the receiving groove 942. The elastic member 960 is used to drive the locking member 940 to move toward the first position. In this embodiment, the elastic member 960 is a compression spring, and the support rod 926 is further provided with a stopper 9262 protruding upward. One end of the spring abuts against the stopper 9262, and the other end of the spring abuts against the inner wall of the receiving groove 942. Therefore, under normal conditions, the locking member 940 will stay in the first position under the action of the spring. Fig.58 In this position, the locking member 940 closes the channel 923, that is, it prevents the second ring 842 of the second connecting belt 840 from passing through the channel 923 and entering the second connecting hole 924, or passing through the channel 923 and separating from the second connecting hole 924. Furthermore, the end of the locking member 940 away from the channel 923 is also provided with an operating portion 944 protruding outward.

[0247] Please refer again Fig.50 When using the carrier 1000 to transport a pet, the pet can be placed on the base fabric 700 supported by the support plate 36, and then the mesh 800 is covered on the base fabric 700. Then, the user applies force to the operating portion 944 of the locking member 940 to compress the elastic member 960 and slide the locking member 940 from the first position to the second position. Fig.61 As shown, when the locking member 940 slides to the second position, the channel 923 is in an open state. At this time, the second ring 842 of the second connecting belt 840 can be passed through the channel 923 and enter the second connecting hole 924. After stopping the application of force to the operating part 944, under the action of the rebound force of the elastic member 960, the locking member 940 will return from the second position to the first position, thereby closing the channel 923. At this time, the second ring 842 cannot be separated from the second connecting hole 924, that is, the mesh 800 and the base fabric 700 are fixed. Next, the length of the adjustment belt 860 can be adjusted, thereby adjusting the size of the accommodation space formed by the base fabric 700 and the mesh 800 to match the size of the pet loaded. When the pet is transported to the designated location, the user can apply force to the operating part 944 of the locking member 940 again to overcome the elastic force of the elastic member 960 and slide the locking member 940 from the first position to the second position. When the locking member 940 is separated from the channel 923, the channel 923 is in an open state. At this time, the second ring 842 of the second connecting belt 840 can be passed through the channel 923 and separated from the second connecting hole 924, so as to separate the mesh 800 from the base fabric 700. At this time, the pet can be unloaded from the carrier 100 relatively easily.

[0248] The above-mentioned carrier 100 includes a buckle body 920 with a channel 923 and a locking member 940 that can selectively open or close the channel. The first connecting belt 740 and the second connecting belt 840 can be quickly connected by simply operating the locking member 940, thereby facilitating the connection, fixation and disassembly of the mesh 800, improving the user's operating experience, and improving the timeliness of pet treatment, thereby avoiding delays in pet treatment time due to the inconvenience of connecting, fixing or disassembling the mesh 800.

[0249] It can be understood that in other embodiments, the stop portion 9262 and the operating portion 944 may also be omitted.

[0250] See also Fig.62 and Fig.63 In another embodiment, the structure of the first fastener assembly 900 is Fig.58 and Fig.59 The structure of the first buckle assembly 900 shown is basically the same, the difference is that one end of the first buckle assembly 900 is fixedly connected to the second connecting belt 840 of the mesh 800, that is, the second ring 842 passes through and is fixed to the first connecting hole 922. At this time, the other end of the first buckle assembly 900 can also be movably connected to the first connecting belt 740 of the base fabric 700, that is, the first ring 742 passes through the channel 923. In this way, after the mesh 800 is removed from the base fabric 700, the first buckle assembly 900 will be removed together with the mesh 800, and will not be hung on the edge of the base fabric 700, so that the bracket device 300 appears cleaner and tidier. It can be understood that in other embodiments, the first ring 742 can also be directly set on the base fabric 700, and the first connecting belt 740 can also be omitted.

[0251] See also Fig.64 and Fig.65 According to another embodiment of the present application, the carrier is Fig.50 The carrier 1000 of the illustrated embodiment is relatively similar, and includes a support device, a base fabric, a mesh fabric, and a first buckle assembly 900. The difference is that the structure of the first buckle assembly 900 is changed.

[0252] The first buckle assembly 900 includes a buckle body 920 and a locking member 940. The buckle body 920 is similar in shape to a Japanese buckle, and a first connecting hole 922 and a second connecting hole 924 are arranged in parallel on the buckle body 920. The first connecting hole 922 is a fully enclosed hole, and the first ring 742 of the first connecting belt 740 passes through the first connecting hole 922 and is fixedly connected to the buckle body 920. The edge of the second connecting hole 924 is also provided with a channel 923 connected to the outside world. The second ring 842 of the second connecting belt 840 passes through the channel 923 to enter the second connecting hole 924. In this embodiment, the shape of the locking member 940 is roughly a torsion spring, which is made of an elastically deformable material (such as metal). Specifically, the locking member 940 includes a first pivoting portion 941, a second pivoting portion 943, a first force applying portion 945, a second force applying portion 947 and a blocking portion 949. The first pivoting portion 941 and the second pivoting portion 943 are respectively arranged and pivoted on the buckle body 920, and the axis of the first pivoting portion 941 and the axis of the second pivoting portion 943 are staggered from each other. The first force applying portion 945 is connected to the first pivoting portion 941, and the second force applying portion 947 is connected to the second pivoting portion 943. The blocking portion 949 is connected between the first force applying portion 945 and the second force applying portion 947, and can move between a first position to close the channel 923 and a second position to open the channel 923. In a normal state, the locking member 940 stays at Fig.65 In this position, the blocking portion 949 abuts against the hole wall of the second connecting hole 924, thereby closing the channel 923.

[0253] When the first buckle assembly 900 is in use, the user can apply force to the first force-applying part 945 and the second force-applying part 947, so that the locking member 940 rotates with the first pivoting part 941 and the second pivoting part 943 as the axis, so that the blocking part 949 moves from the first position to the second position in the direction away from the channel 923. When the blocking part 949 is separated from the channel 923, the channel 923 is in an open state. At this time, the second ring 842 of the second connecting belt 840 can be passed through the channel 923 and enter the second connecting hole 924. After stopping applying force to the first force-applying part 945 and the second force-applying part 947, under the action of the resilience of the locking member 940 itself, the blocking part 949 returns from the second position to the first position, thereby closing the channel 923. At this time, the second ring 842 cannot be separated from the second connecting hole 924, that is, the mesh 800 and the base fabric 700 are fixed.

[0254] It can be understood that in other embodiments, the second loop 842 of the second connecting belt 840 passes through the first connecting hole 922 and is fixedly connected to the buckle body 920 , and the first loop 742 of the first connecting belt 740 passes through the channel 923 to enter the second connecting hole 924 .

[0255] See also Fig.66 and Fig.67 According to another embodiment of the present application, the carrier is Fig.50 The carrier 1000 of the illustrated embodiment is relatively similar, and includes a support device, a base fabric, a mesh fabric, and a first buckle assembly 900. The difference is that the structure of the first buckle assembly 900 is changed.

[0256] In this embodiment, the first buckle assembly 900 includes a buckle body 920, and the edge of the buckle body 920 near the channel 923 is provided with a limiting protrusion 927 protruding toward the second connection hole 924. In this embodiment, the spacing of the channels 923 is relatively small, which is basically equal to or slightly larger than the thickness of the second connection belt 840. Of course, the spacing of the channels 923 can also be slightly smaller than the thickness of the second connection belt 840. Therefore, after the second ring 842 of the second connection belt 840 passes through the channel 923 and enters the second connection hole 924, even if a locking member is not provided, the second ring 842 is difficult to pass through the channel 923 and disengage from the second connection hole 924 under the action of the limiting protrusion 927, thereby also achieving the fixation of the mesh 800 and the base fabric 700. In another embodiment, the longitudinal cross-sectional area of ​​the limiting protrusion 927 may also be gradually increased, so as to further compress the spacing of the channel 923, thereby increasing the difficulty of the second ring 842 passing through the channel 923 and achieving the fixation of the mesh 800 and the base fabric 700.

[0257] For example, in some embodiments, the channel 923 is trumpet-shaped, and along the direction in which the second connection belt 840 penetrates the channel 923 from the outside, the size of the channel 923 gradually decreases, and the narrowest part is, for example, smaller than the thickness of the second connection belt 840. In this way, the second ring 842 is easily guided into the second connection hole 924 through the channel 923, but it is not easy to leave from the second connection hole 924 through the channel 923.

[0258] It is understood that in other embodiments, the channel 923 and the limiting protrusion 927 can also be set at the edge of the first connection hole 922, and the second connection hole 924 is a fully enclosed hole. In addition, in some embodiments, the channel 923 and the limiting protrusion 927 can also be set at the edges of the first connection hole 922 and the second connection hole 924. In some embodiments, the buckle body 920 can be S-shaped.

[0259] See also Figures 68 to 70 According to another embodiment of the present application, the carrier 1000 is Fig.50 The carrier 1000 of the illustrated embodiment is relatively similar, and includes a support device, a base fabric, a mesh fabric, and a first buckle assembly 900. The difference is that the structure of the first buckle assembly 900 is changed.

[0260] In this embodiment, the first buckle assembly 900 includes a buckle body 920 and a locking member 940, and the edge of the buckle body 920 near the channel 923 is provided with a limiting protrusion 927 protruding toward the second connecting hole 924. Fig.64 The structure of the locking member 940 of the embodiment shown is the same, so it will not be repeated. Fig.68 In this position, the blocking portion 949 engages with the limiting protrusion 927, thereby closing the channel 923. When the user applies force to the first force applying portion 945 and the second force applying portion 947 of the locking member 940, the locking member 940 can rotate around the first pivot portion 941 and the second pivot portion 943, so that the blocking portion 949 moves from the first position against the limiting protrusion 927 to the Fig.69 The blocking portion 949 moves to the second position shown. When the blocking portion 949 is separated from the channel 923, the channel 923 is in an open state. At this time, the second ring 842 of the second connecting belt 840 can be passed through the channel 923 and enter the second connecting hole 924. After the first force applying portion 945 and the second force applying portion 947 stop applying force, the blocking portion 949 will return from the second position to the first position against the limiting protrusion 927 under the action of its own resilience, thereby closing the channel 923. At this time, the second ring 842 cannot be separated from the second connecting hole 924, that is, the mesh 800 and the base fabric 700 are fixed.

[0261] It can be understood that in other embodiments, the second loop 842 of the second connecting belt 840 passes through the first connecting hole 922 and is fixedly connected to the buckle body 920 , and the first loop 742 of the first connecting belt 740 passes through the channel 923 to enter the second connecting hole 924 .

[0262] See also Figure 71 to Figure 72 According to another embodiment of the present application, the carrier is Fig.50 The carrier 1000 of the illustrated embodiment is relatively similar, and includes a support device, a base fabric, a mesh fabric, and a first buckle assembly 900. The difference is that the structure of the first buckle assembly 900 is changed.

[0263] In this embodiment, the first buckle assembly 900 includes a male buckle 910 and a female buckle 930. The male buckle 910 is provided with a first connection hole 922, and the female buckle 930 is provided with a second connection hole 924. The first ring 742 of the first connecting belt 740 passes through the first connection hole 922 and is fixedly connected to the male buckle 910, thereby achieving fixed connection between the male buckle 910 and the base fabric 700. The second ring 842 of the second connecting belt 840 passes through the second connection hole 924 and is fixedly connected to the female buckle 930, thereby achieving fixed connection between the female buckle 930 and the mesh 800.

[0264] When the first buckle assembly 900 is in use, the male buckle 910 can be plugged into the female buckle 930 to achieve the fastening of the mesh 800 and the base fabric 700, which is very convenient. Similarly, when the mesh 800 and the base fabric 700 need to be separated, the elastic arms 9102 on both sides of the male buckle 910 can be pressed to conveniently remove the male buckle 910 from the female buckle 930.

[0265] It is understandable that in other embodiments, the male buckle 910 may also be fixedly connected to the mesh 800 via the second connecting belt 840 , and in this case, the female buckle 930 is fixedly connected to the base fabric 700 via the first connecting belt 740 .

[0266] See also Figure 73 to Figure 74 According to another embodiment of the present application, the carrier is Fig.52 and Fig.62 The carrier 1000 of the embodiment shown is relatively similar, and includes a support device 300, a base fabric 700, a mesh fabric and a second fastener assembly 900'. The difference is that: Fig.52 and Fig.55 The positioning ring 364 shown in FIG. 3 is replaced by the second fastener assembly 900 ′. In other words, the fastener assembly includes the second fastener assembly 900 ′ disposed between the base fabric 700 and the bracket device 300 .

[0267] The bracket device 300 includes a first bracket 32 ​​, a second bracket 34 , and a support plate 36 located between the first bracket 32 ​​and the second bracket 34 .

[0268] The base fabric 700 is covered on the support plate 36 and fixed to the support plate 36. A plurality of positioning pieces 362 are provided at both ends of the support plate 36. The positioning pieces 362 can be fixed to the support plate 36 by sewing or the like, for example. More specifically, the positioning pieces 362 are fixed to the bottom surface of the support plate 36. The belt guide mechanism 33 corresponds to the middle position of the bottom surface of the support plate 36 and the short side of the belt guide mechanism 33 close to the support plate 36. Two positioning pieces 362 are respectively located on both sides of the belt guide mechanism 33. That is, positioning pieces 362 are respectively arranged on both sides of each belt guide mechanism 33. The base fabric 700 includes a main body 710 and four fixing belts 770 located at the four corners of the main body 710. The connection position of each fixing belt 770 with the main body 710 is close to the four corners of the main body 710, that is, within the protection scope of the present application. In some embodiments, the connection position of each fixing belt 770 with the base fabric 700 is on the second fixing part 730. In some embodiments, the connection position between each fixing belt 770 and the base fabric 700 is on the main body 710 .

[0269] The second buckle assembly 900' is disposed between the positioning piece 362 and the fixing belt 770. In this embodiment, Fig.73 The specific structure of the second fastener assembly 900' is shown in FIG. Fig.58 The first buckle assembly 900 shown is substantially the same and therefore will not be described in detail. A third ring 7702 is provided at one end of the fixing strap 770 and passes through the first connection hole 922 and is fixedly connected to the buckle body 920. A fourth ring 3622 is provided at one end of the positioning piece 362 and passes through the channel 923 to enter the second connection hole 924. Fig.74 and Fig.75 As shown, when the fourth ring 3622 enters the second connecting hole 924, the positioning piece 362 is connected to the fastener body 920, thereby achieving the fixation of the base fabric 700 and the support plate 36; when the fourth ring 3622 passes through the channel 923 and separates from the second connecting hole 924, the positioning piece 362 is separated from the fastener body 920, thereby achieving the separation of the base fabric 700 and the support plate 36.

[0270] It can be understood that in another embodiment, the fourth loop 3622 of the positioning plate 362 passes through the first connecting hole 922 and is fixedly connected to the buckle body 920. At this time, the third loop 7702 of the fixing belt 770 can pass through the channel 923 to enter the second connecting hole 924, thereby also realizing the detachable connection between the base fabric 700 and the support plate 36.

[0271] Understandably, Figure 73 to Figure 75 The structure of the second fastener assembly 900' shown can also be replaced by Fig.65 , Fig.67 , Fig.69 and Fig.72 The structure of the first fastener assembly 900 is shown.

[0272] See also Fig.74 and Fig.76In this embodiment, the base fabric 700 includes a plurality of first connection belts 740 extending outward from the edge of the main body 710. Each first connection belt 740 is respectively arranged at one end of the fixing belt 770, thereby improving the connection strength of the first connection belt 740. Specifically, in some embodiments, each first connection belt 740 and the corresponding fixing belt 770 can be integrally formed, and the middle section is sewn to the four corners of the main body 710. The connection position of each first connection belt 740 with the base fabric 700 is close to the four corners of the main body 710, that is, within the protection scope of the present application. In some embodiments, the connection position of each first connection belt 740 with the base fabric 700 is on the second fixing portion 730. In some embodiments, the connection position of each first connection belt 740 with the base fabric 700 is on the main body 710. In other embodiments, the fixing belt 770 can be formed by extending outward from the edge of the main body 710 (the fixing belt 770 is also formed by extending outward from the edge of the second fixing portion 730 within the protection scope of the present application), and the first connecting belt 740 is sewn to the main body 710 at a position corresponding to the fixing belt 770, and extends in a direction opposite to the extension direction of the fixing belt 770.

[0273] See also Fig.76 , one end of the first connecting belt 740 is provided with a first loop 742 for passing through the channel 923 of the first buckle assembly 900. The first loop 742 is provided with a Velcro 7422 on the side facing the base fabric 700, and the base fabric 700 is correspondingly provided with a Velcro 7704. When the first loop 742 is not connected to the first buckle assembly 900, the first loop 742 can be kept in a state of being attached to the base fabric 700 through the bonding effect of the Velcro 7422 and 7704, preventing the first loop 742 from swinging at will and affecting the use, and improving the overall appearance of the product. It can be understood that in other embodiments, the Velcro 7422 and 7704 can also be replaced by mechanisms such as snaps that cooperate with each other, hooks and rings that cooperate with each other. Of course, if the sewing length between the first connecting belt 740 and the main body 710 is extended, the Velcro 7422 and 7704 can also be omitted.

[0274] See also Fig.77 and Fig.78 The fastener assembly also includes a third fastener assembly 900 disposed between the mesh 800 and the bracket device 300. In this embodiment, the middle edge of the support plate 36 extends outward to form a plurality of third connecting belts 760. The edge of the mesh 800 is also provided with a plurality of second connecting belts 840 extending outward (see Fig.63 ). Fig.77 , Fig.78 The specific structure of the third fastener assembly 900" shown in FIG. Fig.58The first buckle assembly 900 shown is basically the same, so it is not repeated here. One end of the third buckle assembly 900" is fixedly connected to the second connecting belt 840 of the mesh 800, and the other end of the third buckle assembly 900" is movably connected to the third connecting belt 760. In this embodiment, a Velcro 7602 is provided on the side of the third connecting belt 760 facing the second fixing portion 730 of the base fabric 700, and a corresponding Velcro 7304 is provided on the second fixing portion 730 of the base fabric 700. When the third connecting belt 760 is not connected to the third buckle assembly 900", that is, when the mesh 800 is not set on the base fabric 700, the third connecting belt 760 can be kept in a state of being attached to the second fixing portion 730 through the bonding effect of the Velcro 7602 and 7304, so as to prevent the third connecting belt 760 from swinging randomly and affecting the use when the third connecting belt 760 is not connected to the third buckle assembly 900", and the overall appearance of the product can be improved. It is understandable that in other embodiments, the Velcro 7602, 7304 may be omitted, or replaced with mechanisms such as snaps that cooperate with each other, hooks and loops that cooperate with each other, etc.

[0275] It is understood that in other embodiments, Figure 77 to Figure 78 The structure of the third fastener assembly 900" shown in the figure can also be replaced by Fig.65 , Fig.67 , Fig.69 and Fig.72 The structure of the first fastener assembly 900 is shown.

[0276] Fig.79 FIG. 1 shows a perspective view of a wheeled mobile device 100 provided according to an embodiment of the present invention. The wheeled mobile device 100 may include a wheel assembly 10, a frame 20, a carrier 30, and a second locking mechanism A40. The wheel assembly 10 includes a front wheel assembly 12 and a rear wheel assembly 14. The frame 20 includes a front support frame A22 connected to the front wheel assembly 12 and a rear support frame A24 connected to the rear wheel assembly 14. The front support frame A22 and the rear support frame A24 are pivotally connected to each other so that the frame 20 can be in an unfolded state (see FIG. 1 ). Figure 81 to Figure 83 ) and folded state (see Fig.85 ) between the two. The carrier 30 is detachably mounted on the frame 20 (see Fig.86 When the carrier 30 is mounted on the frame 20, the frame 20 can be restricted from switching to the folded state. The second locking mechanism A40 is disposed on the carrier 30. When the frame 20 is in the unfolded state, the second locking mechanism A40 can lock the carrier 30 with the frame 20.

[0277] It should be noted that the present invention can be changed according to the type of the carrier 30, and the wheeled mobile device 100 can be regarded as different mobile tools. For example, when the carrier 30 is a stretcher structure, the wheeled mobile device 100 can be regarded as a wheeled mobile stretcher, which can be used to transfer animals (such as pets), etc. In the embodiments shown below, the wheeled mobile device 100 is exemplarily described by taking a wheeled mobile stretcher as an example.

[0278] It should be noted that the carrier 30 can be removed from the frame 20 and used alone. In other words, the carrier 30 does not have to be used in conjunction with the frame 20. For example, the carrier 30 can be placed on the ground, a vehicle seat or other supporting objects for use.

[0279] The wheeled mobile device 100 can freely switch the frame 20 between the unfolded state and the folded state by pivoting the front support frame A22 and the rear support frame A24. The carrier 30 can be detachably mounted on the frame 20, so that when the wheeled transfer device 100 is not in use, the carrier 30 can be removed from the frame 20 and the frame 20 can be folded, thereby facilitating storage without occupying a large additional space.

[0280] Continue to see Fig.79 In one embodiment, the wheeled mobile device 100 includes a covering A80. The covering A80 covers the carrier 30 and forms a bearing portion A801, which is used to support the object to be transferred, such as an animal. It should be noted that the covering A80 can be made of a rigid material (such as a plastic board, a wooden board) or a flexible material (such as a canvas) according to the actual application requirements. In some embodiments, the covering can be composed of a combination of a rigid material and a flexible material.

[0281] Fig.80 Shows Fig.79 The wheeled mobile device 100 is shown in a three-dimensional view when the covering A80 is omitted. In some embodiments, the structure of the frame 20 is substantially bilaterally symmetrical. Fig.80 and Fig.81Specifically, the front support frame A22 is, for example, a U-shaped structure, which includes front rods A221 arranged in parallel on the left and right sides and a front crossbar A222 connected between the two front rods A221, and the front crossbar A222 extends along the first direction F1, which is equivalent to the left and right direction. More specifically, the front crossbar A222 is located at the top of the two front rods A221. The rear support frame A24 is, for example, a U-shaped structure, which includes rear rods A241 arranged in parallel on the left and right sides and a rear crossbar A242 connected between the two rear rods A241, and the rear crossbar A242 extends along the first direction F1 and is located at the top of the two rear rods A241. More specifically, each front rod A221 is respectively arranged crosswise with the rear rod A241 on the same side, and the front rod A221 and the rear rod A241 on the same side are pivotally connected to the first pivot point Q1 through a locking pin, and a rotation axis XX is formed at the first pivot point Q1, and the rotation axis XX is the central axis of the locking pin (the rotation axis XX is parallel to the first direction F1). More specifically, the two front rods A221 are arranged on the inner side of the two rear rods A241, that is, the distance between the two front rods A221 is slightly smaller than the distance between the two rear rods A241. Of course, in other alternative embodiments, the two front rods A221 are arranged on the outer side of the two rear rods A241, that is, the distance between the two front rods A221 is slightly larger than the distance between the two rear rods A241.

[0282] It should be noted that, unless otherwise clearly specified and limited, the present invention Figure 79 to Figure 107 The directional terms such as "front", "rear", "left", and "right" of the wheeled mobile device 100 in the embodiments involved are based on the "front", "rear", "left", and "right" directions of the wheeled mobile device 100 in normal driving, and the arrows B and P in the figure schematically indicate the "front" and "rear" directions, and the arrows L and R schematically indicate the "left" and "right" directions. These directional terms are only used to make the description of the embodiments of the present invention clearer, and are not used to improperly limit the scope of protection of the present invention.

[0283] See also Figures 79 to 81 In some embodiments, a front reinforcing rod A23 is provided between the two front rods A221, and the front reinforcing rod A23 is arranged parallel to the front cross bar A222 and close to the bottom end of the front rod A221. A rear reinforcing rod A25 is provided between the two rear rods A241, and the rear reinforcing rod A25 is arranged parallel to the rear cross bar A242 and close to the bottom end of the rear rod A241.

[0284] See also Figure 80 to Figure 82 In some embodiments, the wheeled mobile device 100 further includes a linkage mechanism A70. The linkage mechanism A70 is pivotally connected between the front support frame A22 and the rear support frame A24, and the linkage mechanism A70 has an extended state and a retracted state. When the linkage mechanism A70 is in the extended state (see Fig.83 ) and collapsed state (see Fig.85 ) when switching between the two, the frame 20 is linked with the linkage mechanism A70 and is in the unfolded state (see Fig.83 ) and folded state (see Fig.85 )

[0285] Continue to see Figure 80 to Figure 82 In some embodiments, the linkage mechanism A70 includes a rotating member A72 and a linkage member A74 pivotally connected to each other. Specifically, one of the first end of the rotating member A72 and the first end of the linkage member A74 is pivotally connected to the front support frame A22, and the other is pivotally connected to the rear support frame A24. The second end of the linkage member A74 is pivotally connected to the second pivot point Q2 of the rotating member A72. In some embodiments, one of the first end of the rotating member A72 and the first end of the linkage member A74 is pivotally connected to the third pivot point Q3 of the front support frame A22, and the other is pivotally connected to the fourth pivot point Q4 of the rear support frame A24. More specifically, in this embodiment, the first end of the rotating member A72 is pivotally connected to the third pivot point Q3 of the front support frame A22, and the first end of the linkage member A74 is pivotally connected to the fourth pivot point Q4 of the rear support frame A24 (see Fig.80 and Fig.81 ). More specifically, Fig.80 As shown, the third pivot point Q3 and the fourth pivot point Q4 are both located above the first pivot point Q1. In addition, in some alternative embodiments, the third pivot point Q3 and the fourth pivot point Q4 may be located below the first pivot point Q1. Of course, in other alternative embodiments, the first end of the linkage member A74 is pivotally connected to the third pivot point Q3 of the front support frame A22, and the first end of the rotating member A72 is pivotally connected to the fourth pivot point Q4 of the rear support frame A24.

[0286] It should be noted that, in the present embodiment, both the rotating member A72 and the connecting member A74 are rod-shaped structures, and both have two ends arranged oppositely along their axial direction or length direction. Taking the connecting member 74 as an example, among its two ends, one end can be called the "first end" and the other end can be called the "second end". Taking the rotating member A72 as an example, one end connected to the support frame A22 can be called the "first end", and the other end connected to the operating handle A73 described below can be called the "second end". In the embodiment where the operating handle A73 is not provided, the end of the rotating member A72 that is relatively close to the second pivot point Q2 and away from the third pivot point Q3 can be called the "second end".

[0287] It should be noted that the “above” and “below” mentioned above are not limited to directly above and directly below.

[0288] Depend on Figure 81 to Figure 85It can be seen that when the linkage mechanism A70 is in the unfolded state, the frame 20 is also in the unfolded state. Fig.83 At this time, the rotating member A72 and the connecting member A74 are relatively unfolded and arranged generally horizontally, and the angle α between the two is approximately 180 degrees, and the second pivot point Q2, the third pivot point Q3 and the fourth pivot point Q4 are generally in the same horizontal plane. The upper end of the front support frame A22 and the upper end of the rear support frame A24 are far away from each other, and the lower end of the front support frame A22 and the lower end of the rear support frame A24 are far away from each other. Of course, in some embodiments, when the frame 20 is in the unfolded state, the angle α between the rotating member A72 and the connecting member A74 can be an obtuse angle greater than 90 degrees. Continue to refer to Figure 81 to Figure 83 When the vehicle frame 20 is in the unfolded state, the second pivot point Q2 is located between the third pivot point Q3 and the fourth pivot point Q4. Fig.85 When the linkage mechanism A70 is in the folded state, the frame 20 is in the folded state, and the angle α between the rotating member A72 and the linkage member A74 is an acute angle. The upper end of the front support frame A22 and the upper end of the rear support frame A24 are close to each other, and the lower end of the front support frame A22 and the lower end of the rear support frame A24 are close to each other.

[0289] In some embodiments, when the frame 20 switches from the unfolded state to the folded state, the carrier 30 does not need to be completely separated from the frame 20. As long as the carrier 20 is disconnected from one of the front support frame A22 and the rear support frame A24, the frame 20 is allowed to be folded. For example, in some embodiments, a short rod A321 of the carrier 30 is pivotally connected to one of the upper ends of the front support frame A22 (e.g., the front cross bar A222) and the upper ends of the rear support frame A24 (e.g., the rear cross bar A242), and a second locking mechanism A40 is disposed on another short rod A321 or a support rod A322 of the carrier 30. The second locking member A41 of the second locking mechanism A40 cooperates with the engaging groove A262 to lock the carrier 30 on the frame 20, or to allow the carrier 30 to rotate around the front cross bar A222 or the rear cross bar A242 so as not to interfere with the folding of the frame 20.

[0290] See also Fig.80 and Fig.81In the present embodiment, the linkage mechanism A70 includes two rotating members A72 and two linkage members A74. Specifically, the two rotating members A72 are arranged in parallel in the left-right direction, and the two linkage members A74 are also arranged in parallel in the left-right direction. The second end of each linkage member A74 is pivotally connected to the middle part of a rotating member A72 on the same side at a second pivot point Q2, and the first end of each linkage member A74 is pivotally connected to the rear rod member A241 on the same side. The first end of each rotating member A72 is pivotally connected to the front rod member A221 on the same side. More specifically, in some embodiments, the linkage mechanism A70 also includes an operating handle A73 connected to the second ends of the two rotating members A72, and the operating handle A73 is used to drive the two rotating members A72 to rotate synchronously.

[0291] It should be noted that, in the rotating member A72 or the linking member A74 having a rod-shaped structure, the "middle portion" refers to the area between the first end and the second end. Fig.80 As shown, the first end of the rotating member A72 and the first end of the connecting member A74 are far away from each other, and the second end of the connecting member A74 is pivotally connected to the rotating member A72, specifically, to the middle part of the rotating member A72 (the area between the first end and the second end of the rotating member A72).

[0292] Combine the following Figure 81 to Figure 85 The unfolding and folding process of the frame 20 will be described.

[0293] When the frame 20 in the present embodiment needs to be folded, the operating handle A73 is pulled upward in the vertical direction (third direction F3). The third direction F3 is roughly perpendicular to the first direction F1. At this time, the rotating member A72 drives its first end to rotate around the third pivot point Q3 while the operating handle A73 moves. In addition, the second end of the linking member A74 will pivot around the second pivot point Q2 as the rotating member A72 moves, and the first end of the linking member A74 will rotate around the fourth pivot point Q4, thereby making the first end of the linking member A74 relatively close to the first end of the rotating member A72. At the same time, through the third pivot point Q3 and the fourth pivot point Q4, the front support frame A22 and the rear support frame A24 are pulled closer to each other until the frame 20 is folded to Fig.85 During this process, the angle α between the rotating member A72 and the connecting member A74 on the same side changes from approximately 180 degrees to an acute angle less than 90 degrees (such as Fig.85 As shown, when the frame 20 is fully folded, the angle α is less than 90 degrees. The frame 20 of the embodiment of the present invention can reduce its volume by folding itself, so that the wheeled mobile device 100 can be easily stored when not in use.

[0294] When it is necessary to unfold the frame 20 in this embodiment, the user (mainly represented by medical staff) can directly press the front cross bar A222 and the rear cross bar A242 downward in the vertical direction, so that the front support frame A22 and the rear support frame A24 rotate at the first pivot point Q1 and move away from each other. In this process, the front support frame A22 and the rear support frame A24 synchronously drive the rotating member A72 and the connecting member A74 to move together, so that the rotating member A72 rotates downward around the third pivot point Q3 of the front support frame A22, and the connecting member A74 rotates downward around the fourth pivot point Q4 of the rear support frame A24. At the same time, the rotating member A72 and the connecting member A74 rotate around the second pivot point Q2, and finally the rotating member A72 and the connecting member A74 are on the same horizontal plane (such as Fig.83 That is, the angle α between the linking member A74 and the rotating member A72 is changed from an acute angle less than 90 degrees to approximately 180 degrees.

[0295] See also Figures 79 to 82 In some embodiments, two front wheel assemblies 12 are installed at the bottom of the front support frame A22, and two rear wheel assemblies 14 are installed at the bottom of the rear support frame A24. More specifically, a front wheel assembly 12 is installed at the bottom end of each of the two front rods A221, and a rear wheel assembly 14 is installed at the bottom end of each of the two rear rods A241. In this way, the user can easily drive the frame 20 to move through the wheel assembly 10.

[0296] See also Fig.80 and Fig.86 In some embodiments, the carrier 30 can be detachably mounted on the frame 20. In this embodiment, when the carrier 30 is a stretcher structure, for example, the carrier 30 includes a support device A31, and the support device A31 is roughly a rectangular frame structure. Specifically, the support device A31 includes a first support A32, and the first support A32 includes two short rods A321 and two long rods A323 connected in sequence. The two short rods A321 and the two long rods A323 are parallel to each other and connected end to end in sequence, thereby forming a rectangular frame structure. Among them, the two short rods A321 are arranged at intervals along the second direction F2, and the two long rods A323 are arranged at intervals along the first direction F1. The second direction F2 is equivalent to the front-to-back direction. The second direction F2 and the first direction F1 are not parallel. More specifically, the second direction F2 is substantially perpendicular to the first direction F1. More specifically, see Fig.79 and Fig.80 In one embodiment, the covering 80 is roughly rectangular in structure, and the four sides of the covering A80 are respectively connected to the corresponding two short rods A321 and two long rods A323, and the area of ​​the covering A80 located inside the rectangular frame forms a bearing portion A801 ​​that supports the object to be transferred.

[0297] See also Fig.79 and Fig.80In some implementations, each short rod A321 and / or each long rod A323 is covered with a grip A35, which is used for the user to hold. Specifically, the grip A35 can be a rubber grip, which can increase the friction when the user holds the first bracket A32, so that the first bracket A32 is not easy to fall out of the hand. Alternatively, the grip A35 can be a sponge grip, which can increase the comfort of the user when holding the first bracket A32.

[0298] In some embodiments, the first bracket A32 further includes a support rod A322 connected between the two long rods A323. In this way, the overall structural strength of the carrier 30 can be effectively improved. More specifically, the number of the support rods A322 is two, and the two support rods A322 are spaced apart along the length direction (front-rear direction or second direction F2) of the long rod A323.

[0299] See also Fig.86 and Fig.87 In some embodiments, in order to improve the stability of the carrier 30 installed on the frame 20, the carrier 30 can be locked on the frame 20 by a second locking mechanism A40. In some embodiments, the second locking mechanism A40 includes a second locking member A41, which can move on the carrier 30 and has a locking position and a release position. A snap-fitting groove A262 is provided on the frame 20. When the carrier 30 is installed on the frame 20 and the second locking member A41 is in the locking position, the second locking member A41 extends into the snap-fitting groove A262 to lock the carrier 30 with the frame 20 (see FIG. 2 ). Fig.87 ), so that the movement of the carrier 30 on the frame 20 along the first direction F1 is restricted, and at the same time, the movement of the carrier 30 on the frame 20 along the vertical direction (third direction F3) is restricted. When the carrier 30 is installed on the frame 20 and the second locking member A41 is in the unlocking position, the second locking member A41 is retracted from the engaging groove A262 to release the lock between the carrier 30 and the frame 20. It can be understood that when the second locking member A41 is in the locking position, the carrier 30 and the frame 20 can be locked, and the carrier 30 is not allowed to be removed from the frame 20. When the second locking member A41 is in the unlocking position, the carrier 30 is allowed to be removed from the frame 20.

[0300] In some embodiments, there is at least one second locking mechanism A40, and accordingly, at least one engaging groove A262 is provided on the frame 20. More specifically, in the present embodiment, there are four second locking mechanisms A40 and four engaging grooves A262. When the frame 20 is in the unfolded state and the vehicle 30 is mounted on the frame 20, the four second locking mechanisms A40 are divided into two locking mechanism groups, and each locking mechanism group includes two second locking mechanisms A40. The two second locking members A41 included in each locking mechanism group are arranged at intervals along the first direction F1, and the two locking mechanism groups are arranged at intervals along the second direction F2 on the vehicle 30. In this way, the two locking mechanism groups arranged along the front-to-back direction can be regarded as a front locking mechanism group and a rear locking mechanism group.

[0301] Specifically, the second locking members A41 in each of the second locking mechanisms A40 can move along the front-to-back direction (the second direction F2) on the carrier 30 to have a locking position extending into the corresponding engaging groove A262 and a releasing position retracted from the engaging groove A262. More specifically, in the two locking mechanism groups (the front locking mechanism group and the rear locking mechanism group) arranged in the second direction F2, the releasing and locking directions of the second locking members A41 in the two locking mechanism groups are opposite. For example, the two second locking members A41 in the front locking mechanism group move forward to the locking position and move backward to the releasing position; while the two second locking members A41 in the rear locking mechanism group move forward to the releasing position and move backward to the locking position. In this way, when the two second locking members A41 in the front locking mechanism group are respectively inserted into the corresponding engaging grooves A262, and the two second locking members A41 in the rear locking mechanism group are respectively inserted into the corresponding engaging grooves A262, the movement of the carrier 30 on the frame 20 along the second direction F2 is restricted, and finally the carrier 30 is more firmly installed on the frame 20. Of course, in some alternative embodiments, the unlocking and locking directions of the second locking members A41 in the two locking mechanism groups can be consistent.

[0302] See also Figures 87 to 91 Specifically, in this embodiment, the second locking mechanism A40 is disposed on the support rod A322. More specifically, as Fig.80 and Fig.86As shown, the vehicle frame 20 includes at least one support seat A26, each support seat A26 is provided with a support groove A261, and a snap-fit ​​groove A262 is provided on the support seat A26 and communicated with the support groove A261. When the vehicle 30 is mounted on the vehicle frame 20, the support rod A322 is snap-fitted into the support groove A261 and supported by the support seat A26. At this time, when the second locking member A41 is in the locking position, the second locking member A41 extends into the snap-fit ​​groove A262 to lock the vehicle 30 on the support seat A26. When the second locking member A41 is in the unlocking position, the second locking member A41 retracts from the snap-fit ​​groove A262. In this way, the user can directly remove the vehicle 30 from the vehicle frame 20. More specifically, the second locking mechanism A40 is disposed in the support rod A322, and the support rod A322 is provided with a telescopic hole group A325 for the second locking member A41 to pass through. The second locking piece A41 moves along the second direction F2 in the telescopic hole group A325. When the second locking piece A41 extends out of the telescopic hole group A325, the second locking piece A41 is in a locking position; when the second locking piece A41 retracts into the telescopic hole group A325, the second locking piece A41 is in a releasing position.

[0303] See also Fig.81 and Fig.86 In some embodiments, the support seat A26 includes a connecting section A263, a supporting section A264 and a limiting section A265 which are connected in sequence and arranged at an angle. The connecting section A263, the supporting section A264 and the limiting section A265 are enclosed to form a support groove A261. The connecting section A263 is fixed on the frame 20, and the engaging groove A262 is provided on the side of the limiting section A265 facing the support groove A261. Specifically, the support seat A26 on the front support frame A22 is fixed to the front cross bar A222 through the connecting section A263, and the support seat A26 on the rear support frame A24 is fixed to the rear cross bar 242 through the connecting section A263. In this way, when the support rod A322 is placed in the support groove A261, the support rod A322 can be abutted by the limiting section A265, thereby limiting the movement of the support rod A322 along the second direction F2. At the same time, after the second locking member A41 passes through the telescopic hole group A325 and is inserted into the engaging groove A262, the movement of the support rod A322 along the third direction F3 and along the first direction F1 is restricted. In this way, the stability of the carrier 30 mounted on the frame 20 is improved, and the carrier 30 is prevented from shaking randomly due to the movement of the frame 20.

[0304] It should be noted that the connection method between the connecting section A263 and the front cross bar A222 or the rear cross bar A242 is not subject to any specific restrictions, and may be, for example, welding, bonding or clamping.

[0305] See also Figures 88 to 91, two second locking mechanisms A40 are respectively provided in the two support rods A322 arranged along the front-to-back direction. In other words, as described above, a front locking mechanism group is provided in one support rod A322, and a rear locking mechanism group is provided in the other support rod A322. Specifically, the two second locking mechanisms A40 located in the same support rod A322 are spaced apart along the left-right direction (first direction F1). More specifically, any two second locking mechanisms A40 located in different support rods A322 have opposite directions of release and locking of the corresponding second locking members A41. In some embodiments, a support seat A26 is provided on both the front support frame A22 and the rear support frame A24. Specifically, the support seat A26 provided on the front support frame A22 is mounted on the front cross bar A222, and the support seat A26 provided on the rear support frame A24 is mounted on the rear cross bar A242. Among the two support rods A322 arranged along the front-to-back direction, one of the support rods A322 can be locked on the support seat A26 on the front support frame A22 by at least one second locking mechanism A40 arranged thereon, and the other support rod A322 can be locked on the support seat A26 on the rear support frame A24 by at least one second locking mechanism A40 arranged thereon.

[0306] See also Fig.87 , Fig.89 and Fig.91 In some embodiments, the second locking mechanism A40 further includes a driving member A42. The driving member A42 is operably connected to the second locking member A41, and the driving member A42 is movable on the carrier 30 and has a first position and a second position. More specifically, the support rod A322 has a receiving space A324 for the driving member A42 to move, and the receiving space A324 is connected to the telescopic hole group A325. When the driving member A42 is in the first position, the second locking member A41 is in the locking position. When the driving member A42 is in the second position, the second locking member A41 is in the unlocking position. In this way, the user can indirectly control the second locking member A41 by controlling the driving member A42.

[0307] Continue to see Fig.87 , Fig.88 , Fig.89 and Fig.91 In some implementations, the support rod A322 includes a rod body A3221 and a mounting cover A3222. A cavity A32211 is formed in the rod body A3221, and a placement port A32212 (see FIG. 1 ) is provided on the rod wall of the rod body A3221 and communicates with the cavity A32211. Fig.89 The installation cover A3222 includes a top cover A32221 and a stopper A32222 connected to one side of the top cover A32221 (see Fig.89 and Fig.91 The receiving space A324 is opened inside the limiting member A32222 (see Fig.91 ). When the top cover A32221 is covered at the placement opening A32212, the stopper A32222 is accommodated in the cavity A32211. In this embodiment, when the top cover A32221 is covered at the placement opening A32212, the top cover A32221 can be assembled with the rod body 3221 by fasteners such as screws.

[0308] More specifically, see Fig.89 and Fig.91 The telescopic hole group A325 includes a first telescopic hole A3251 and a second telescopic hole A3252 that are correspondingly arranged. The first telescopic hole A3251 is arranged on the rod body A3221 and communicates with the cavity A32211, and the second telescopic hole 3252 is arranged on the stopper A32222 and communicates with the receiving space A324. When the second locking member A41 is in the locking position, the second locking member A41 extends out of the second telescopic hole A3252 and the first telescopic hole A3251 in sequence; when the second locking member A41 is in the locking position, the second locking member A41 retracts into the first telescopic hole A3251.

[0309] See also Fig.87 In some embodiments, the second locking mechanism A40 further includes a first guide post A44 fixed to the second locking member A41. Fig.87 , Fig.89 and Fig.91 As shown, the driving member A42 is provided with a first guide groove A421, and the first guide groove A421 extends obliquely relative to the moving direction of the driving member A42. The first guide column A44 can slide in the first guide groove A421. When the driving member A42 switches between the first position and the second position, the second locking member A41 can switch between the locking position and the unlocking position through the cooperation of the first guide column A44 and the first guide groove A421. More specifically, the driving member A42 can move left and right in the limited space, which is equivalent to moving along the first direction F1. Through the sliding cooperation of the first guide column A44 and the first guide groove A421, the second locking member A41 can move along the second direction F2 to extend out of the first telescopic hole A3251 or retract into the first telescopic hole A3251.

[0310] See also Figures 88 to 91 In this embodiment, an exemplary implementation of releasing the second locking member A41 is shown. The wheeled mobile device 100 further includes a release assembly A50 disposed on the carrier 30. The release assembly A50 is used to drive the second locking member A41 to move from the locking position to the release position.

[0311] It should be noted that the release assembly A50 is used to drive the second locking member A41 to move from the locked position to the released position. The release assembly A50 can directly drive the second locking member A41 to move from the locked position to the released position, or the release assembly A50 can indirectly drive the release member A41 to move from the locked position to the released position.

[0312] This embodiment shows an exemplary implementation in which the release assembly A50 drives the release member A52 to move indirectly. Figure 90 to Figure 95 The release assembly A50 includes a release member A52 slidably mounted to the carrier 30, and the release member A52 is connected to the driving member A42 through a traction member A51. The traction member A51 can be, for example, a traction rope. In this way, when the user pushes the release member A52 to move and the traction member A51 drives the driving member A42 to move from the first position to the second position, the first guide column A44 and the first guide groove A421 cooperate to switch the second locking member A41 from the locking position to the release position.

[0313] See also Fig.91 , Fig.92 and Fig.94 In some embodiments, the second locking mechanism A40 further includes an elastic reset member A43. The elastic reset member A43 is, for example, a spring, which abuts against the driving member A42 and is used to keep the driving member A42 in the first position. In this way, when the user releases the release member A52, under the action of the elastic reset member A43, the driving member A42 can automatically move from the second position to the first position, thereby causing the second locking member A41 to automatically switch to the locked position and remain in the locked position. More specifically, the elastic reset member A43 is accommodated in a receiving space A324 formed in the mounting cover A3222, and the two ends of the elastic reset member A43 abut against the driving member A42 and the limiting member A32222, respectively. For example, a boss A422 for a spring sleeve can be provided on the driving member A42, and the boss A422 can be used to locate the position of the spring.

[0314] In some embodiments, the driving member A42 is detachably connected to the traction member A51; or the driving member A42 is fixedly connected to the traction member A51. Fig.91 and Fig.92 In this embodiment, a holding groove A423 is formed on the driving member A42. The holding groove A423 includes a bottom wall A4231, a mounting opening A4232 and a top opening A4233. The mounting opening A4232 is opposite to the bottom wall A4231, and the top opening A4233 extends from the mounting opening A4232 to the bottom wall A4231. Fig.89 , Fig.91 and Fig.92In some embodiments, a first clamping joint portion A511 is formed at one end of the traction member A51, and the first clamping joint portion A511 enters from the installation port A4232 and is accommodated in the clamping groove A423, and the traction member A51 passes through the clamping groove A423 from the top opening A4233. Specifically, the width W of the top opening A4233 is smaller than the size of the first clamping joint portion A511. For example, when the first clamping joint portion A511 is a sphere, the width W of the top opening A4233 is smaller than the diameter of the sphere. In this way, when the traction member A51 is clamped in the clamping groove A423 through the first clamping joint portion A511, the traction member A51 will not be separated from the driving member A42 due to the pulling force. Of course, in some alternative embodiments, the detachable connection method between the traction member A51 and the driving member A42 can also have other embodiments and is not limited to the above examples.

[0315] See also Fig.89 and Fig.91 In some embodiments, the release member A52 has a second guide groove A521. The second guide groove A521 extends obliquely relative to the sliding direction of the release member A52. The release assembly A50 also includes a second guide column A53, which is disposed in the second guide groove A521 and can slide along the second guide groove A521. The second guide column A53 is connected to the driving member A42 through the traction member A51. Specifically, a through hole is provided on the second guide column A53, and a second clamping joint portion A512 is formed after the end of the traction member A51 away from the driving member A42 passes through the through hole. The second clamping joint portion A512 is, for example, a sphere, and the diameter of the second clamping joint portion A512 is greater than the diameter of the through hole. This improves the reliability of the connection between the traction member A51 and the second guide column A53.

[0316] See also Figures 95 to 98 In some embodiments, an inner cavity A301 is formed in the carrier 30. For example, the short rod A321 is a hollow tube, and the inner cavity A301 is formed therein. An operating hole A302 communicating with the inner cavity A301 is provided on the side wall of the carrier 30. Specifically, in this embodiment, when the carrier 30 is installed on the frame 20, the operating hole A302 is arranged upward. Of course, in other alternative embodiments, the operating hole A302 can also be arranged in a horizontal direction or downward. Specifically, the release member A52 passes through the operating hole A302 and extends into the inner cavity A301 and can slide relative to the operating hole A302. See Fig.89 and Fig.91The release assembly A50 further includes a first fixed cover A54 and a second fixed cover A55. The first fixed cover A54 and the second fixed cover A55 cooperate and are fixed to the carrier 30, and the first fixed cover A54 and the second fixed cover A55 are provided with a limiting portion A56 extending into the inner cavity A301 on the opposite side, and a limiting slide groove A561 is provided on the limiting portion A56. The two ends of the second guide column A53 are respectively slidably limited in the corresponding limiting slide groove A561. The extension direction of the limiting slide groove A561 (the first direction F1) is perpendicular to the sliding direction of the release member A52 (i.e., the third direction F3).

[0317] See also Fig.89 and Fig.95 In some embodiments, a limiting protrusion A522 is provided on the release member A52. The limiting protrusion A522 can abut against the edge of the operating hole A302 to prevent the release member A52 from being separated from the carrier 30. Specifically, at least two limiting protrusions A522 are provided, and the two limiting protrusions A522 are arranged opposite to each other.

[0318] In some embodiments, the first fixing cover A54 and the second fixing cover A55 may define an opening A504 that slidably cooperates with the release member A52 , and the limiting protrusion A522 of the release member A52 may abut against the edge of the opening A504 to prevent the release member A52 from detaching from the carrier 30 .

[0319] In some implementations, an elastic member (not shown) is provided in the inner cavity A301 , and the elastic member abuts against the release member A52 , so that the release member A52 tends to extend out of the operating hole A302 .

[0320] See also Fig.91 and Fig.95 In some embodiments, one release assembly A50 can simultaneously control two second locking mechanisms A40 located in the same support rod A322, which is equivalent to one release assembly A50 simultaneously controlling two driving members A42 in the same support rod A322. Specifically, the release member A52 has two second guide grooves A521, which are symmetrically arranged. The bottoms of the two second guide grooves A521 are close to each other (see FIG. Fig.95 ). More specifically, each second guide groove A521 is provided with a second guide column A53, and each second guide column A53 is connected to a corresponding driving member A42 through a corresponding traction member A51.

[0321] See also Figures 88 to 91In this embodiment, the carrier 30 is provided with two release assemblies A50, one of which is used to control the two second locking mechanisms A40 located in one support rod A322, and the other release assemblies A50 is used to control the two second locking mechanisms A40 located in another support rod A322. In other words, it is equivalent to that one of the two release assemblies A50 is used to control the two second locking mechanisms A40 in the front locking mechanism group, and the other release assemblies A50 is used to control the two second locking mechanisms A40 in the rear locking mechanism group.

[0322] Of course, in some alternative embodiments, a second locking mechanism A40 may be provided in each support rod A322. In other words, the carrier 30 is provided with two second locking mechanisms A40, and the two second locking mechanisms A40 are respectively located in different support rods A322. More specifically, the carrier 30 is provided with a release assembly A50, and the release assembly A50 can be used to control the two second locking mechanisms A40 at the same time.

[0323] Combine the following Figures 94 to 98 To illustrate the working process of a release component A50 in this embodiment.

[0324] See also Figures 94 to 96 When the second locking member A41 is in the locked position, the elastic reset member A43 drives the driving member A42 to remain in the first position. At this time, the release member A52 is clamped at the opening A504 through the limiting protrusion A522, and the second guide column A53 is located at the top of the second guide groove A521 (such as Fig.95 See Fig.97 and Fig.98 When the second locking member A41 needs to be unlocked, the user can directly press the release member A52 upwards by hand, and under the guidance of the second guide groove A521, the two second guide posts A53 move to the bottom of the corresponding second guide groove A521 (such as Fig.97 At this time, the two traction members A51 will drive the corresponding driving member A42 to move from the first position to the second position, the two elastic reset members A43 are compressed, and the two second locking members A41 are switched from the locking position to the unlocking position.

[0325] Continue to see Fig.97 and Fig.98When the carrier 30 is removed from the vehicle frame 20, the user can release the release member A52, which is equivalent to not pressing the release member A52. At this time, the driving member A42 is no longer subjected to the traction force applied by the traction member A51. Under the action of the elastic reset member A43, the driving member A42 can move from the second position to the first position, thereby causing the second locking member A41 to move from the release position to the lock position. In addition, since the release member A52 is not subjected to the pressing force provided by the user, during the process of the driving member A42 moving from the second position to the first position, the traction member A51 is driven by the driving member A42 to move. Under the cooperation of the second guide groove A521 and the second guide column A53 (the second guide column A53 will move from the bottom to the top of the second guide groove A521), the (downward moving) release member A52 extends out of the operating hole A302 and resets. In some embodiments, the release member A52 can be gradually moved downward to extend out of the operating hole A302 under the action of an elastic member (not shown) until the limiting protrusion A522 abuts against the edge of the opening A504. In other alternative embodiments, the release member A52 is set in a downward position, and the release member A52 can also extend out of the operating hole A302 under the action of gravity to reset.

[0326] In some embodiments, when the carrier 30 is used as a stretcher structure, a fixing belt assembly A60 is provided on the carrier 30 (see Fig.105 ). When the carrier 30 is used alone, for example, when the carrier 30 is placed on a vehicle seat, the carrier 30 (more specifically, the bracket device A31) can be stably fixed on the vehicle seat by the fixing belt assembly A60. Fig.88 and Fig.99 In some embodiments, the carrier 30 may include a bracket device A31 and at least one belt guide mechanism A33. The bracket device A31 includes a first bracket A32 and a second bracket A34 connected to each other, and the belt guide mechanism A33 is connected between the first bracket A32 and the second bracket A34. The belt guide mechanism A33 is used to cooperate with the fixing belt assembly A60 to fix the bracket device A31 on the vehicle seat.

[0327] Specifically, the belt guide mechanism A33 has a passage A331 (see FIG. 1 ) for the restraining belt A613 of the fixed belt assembly A60 to pass through. Fig.105 ). More specifically, Fig.99 As shown, in this embodiment, each support rod A322 is provided with two belt guide mechanisms A33, and each support rod A322 is provided with a second bracket A34, and the second bracket A34 extends substantially along the length direction (first direction F1) of the support rod A322. The two belt guide mechanisms A33 are respectively provided at both ends of the support rod A322, and the two belt guide mechanisms A33 are connected through the second bracket A34.

[0328] In some embodiments, Fig.99 As shown, the second bracket A34 is a U-shaped structure, which includes two first connecting rods A341 and a second connecting rod A342 connected between the two first connecting rods A341. Specifically, the two first connecting rods A341 are arranged on the support rod A322 at intervals along the length direction of the support rod A322. The two first connecting rods A341 are arranged on the support rod A322 at intervals along the left and right directions, for example, and the two first connecting rods A341 can be parallel to each other. The second connecting rod A342 is connected between the two first connecting rods A341 and extends along the length direction (first direction F1) of the support rod A322. Two belt guide mechanisms A33 are respectively arranged at the two ends of the support rod A322, and the two belt guide mechanisms A33 are respectively connected between the corresponding first connecting rod A341 and the corresponding long rod A323. The two belt guide mechanisms A33 are connected through the second bracket A34. In this way, the structural strength of the two belt guide mechanisms A33 can be improved to avoid damage during the process of clamping and fixing the belt assembly A60.

[0329] It should be noted that, in some embodiments, the second connecting rod A342 of the second bracket A34 can be detachably connected between the two first connecting rods A341, for example, by snap connection, threaded connection, etc. Of course, in other embodiments, the second connecting rod A342 can also be integrally formed between the two first connecting rods A341.

[0330] In some embodiments, Fig.99 As shown, the two second brackets A34 with U-shaped structures are respectively arranged on the side of the corresponding support rod A322 close to the short rod A321, which can be regarded as the openings of the two second brackets A34 are arranged opposite to each other. Of course, in other embodiments, the two second brackets A34 with U-shaped structures are arranged on the side of the corresponding support rod A322 away from the short rod A321, which can be regarded as the openings of the two second brackets A34 are arranged opposite to each other. Of course, in other embodiments, among the two second brackets A34 with U-shaped structures, one is arranged on the side of the corresponding support rod A322 close to the short rod A321, and the other is arranged on the side of the corresponding support rod A322 away from the short rod A321, which can be regarded as the openings of the two second brackets A34 are arranged in the same direction.

[0331] Specifically, in some embodiments, Fig.99 and Fig.100As shown, the belt guiding mechanism A33 includes a clamp body A332 and a cover plate A333. The clamp body A332 includes an upper shell A3321 and a lower shell A3322 connected to the upper shell A3321, and the upper shell A3321 and the lower shell A3322 jointly define a through-channel A331. The upper shell A3321 cooperates with the cover plate A333 and is fixed to the second bracket A34 (specifically the first connecting rod A341), and the lower shell A3322 is fixed to the long rod A323.

[0332] Continue to see Fig.99 The first connecting rod A341, the upper shell A3321 and the cover plate A333 are all provided with first connecting holes A334, and fasteners such as screws can pass through the first connecting holes A334 in sequence to fix the upper shell A3321 and the cover plate A333 to the first connecting rod A341. Fig.99 and Fig.102 As shown, the side of the cover plate A333 facing the upper shell A3321 is provided with a first convex strip A337, and the side of the upper shell A3321 facing the cover plate A333 is provided with a second convex strip A338, so that the structural strength of the cover plate A333 and the upper shell A3321 can be increased. More specifically, the first convex strip A337 and the second convex strip A338 are both provided with an avoidance groove A339, and the shape of the avoidance groove A339 is adapted to the shape of the first connecting rod A341. In this way, when the upper shell A3321 and the cover plate A333 are connected to the first connecting rod A341, the first connecting rod A341 can be engaged in the avoidance groove A339, abutting and confined between the avoidance groove A339 on the first convex strip A337 and the avoidance groove A339 on the second convex strip A338. More specifically, the first convex strip A337 and the second convex strip A338 are provided in plurality and are arranged along the length direction of the first connecting rod A341. The first convex strip A337 and the second convex strip A338 can be arranged opposite to each other up and down, or can be arranged in a staggered manner.

[0333] More specifically, the long rod A323 is provided with a mounting member A335 detachably connected thereto, and the mounting member A335 and the lower shell A3322 are both provided with second connection holes A336, and fasteners such as screws can pass through each of the second connection holes A336 in sequence to fix the lower shell A3322 to the long rod A323. In some embodiments, the mounting member A335 can also be non-detachably connected to the long rod A323.

[0334] See also Figures 99 to 102In some embodiments, the threading channel A331 has a first port A3311 and a second port A3312 for the fixing belt assembly to pass through, and a side inlet A3313 connecting the first port A3311 and the second port A3312. The first convex rib A3314 and the second convex rib A3315 are respectively provided on the side walls opposite to each other in the threading channel A331, and the first convex rib A3314 and the second convex rib A3315 are alternately arranged in the extension direction of the threading channel A331. Specifically, at least one first convex rib A3314 is convexly provided on the side of the upper shell A3321 facing the lower shell A3322, and at least one second convex rib A3315 is convexly provided on the side of the lower shell A3322 facing the upper shell A3321, and each first convex rib A3314 and each second convex rib A3315 are alternately arranged in the extension direction of the restraint belt A613 of the fixing belt assembly A60 (see Fig.105 ). In some embodiments, the height of the first convex rib A3314 and the second convex rib A3315 can be reasonably set so that the restraint belt A613 of the fixing belt assembly A60 located between the first port A3311 and the second port A3312 can be bent in the passage A331 to bypass the top of the first convex rib A3314 and the top of the second convex rib A3315, so that the restraint belt A613 of the fixing belt assembly A60 will be subject to movement resistance from the first convex rib A3314 and the second convex rib A3315. In this way, the fixing belt assembly A60 can be tightened to prevent the fixing belt assembly A60 from easily sliding relative to the bracket device A31.

[0335] See also Figure 103 to Figure 105 , the specific structure of the fixing belt assembly A60 is described separately below. The fixing belt assembly A60 may, for example, include a restraint belt assembly A61 and an extension component A62. The restraint belt assembly A61 includes two restraint belts A613 and a shielding net A614 located between the two restraint belts A613. The restraint belt A613 may be, but is not limited to, an elastic webbing. The restraint belt assembly A61 also includes a first connection end A612 located at one end of each restraint belt A613, a first buckle A611 connected to the other ends of the two restraint belts A613, and a second connection end A615 located below the shielding net A614. In some embodiments, the first connection end A612 is an ISOFIX plug-in, which is plugged into and matched with the ISOFIX socket (not shown in the figure) on the car seat. Please refer to Fig.103 and Fig.104 After the first connection end A612 and the restraint belt A613 pass around the bottom of the bracket device 31, they are detachably connected to the ISOFIX socket of the vehicle seat. Of course, the type of the first connection end A612 is not limited to the ISOFIX plug-in, and it can be any suitable structure such as a hook body, a buckle, etc. Fig.104The second connection end A615 is generally a hook, which can be detachably connected to the long rod A323 of the first bracket A32. It can be understood that the number of the restraining belt A613 can also be one or more. The shielding net A614 and the second connection end A615 can also be omitted in some embodiments.

[0336] In some embodiments, the two restraining belts A613 may be different parts of the same belt. More specifically, the same belt is wound around the first buckle A611, and the first buckle A611 is used as a boundary, and the same belt is divided into two restraining belts A613 located on both sides of the first buckle A611. In some embodiments, the first buckle A611 can slide along the same belt.

[0337] See also Fig.103 Specifically, the extension component A62 includes an extension belt A621, an adjustment portion A622, a second buckle A623, and a third connection end A624. The extension belt A621 is, for example, a webbing, one end of which is connected to the second buckle A623. The second buckle A623 is detachably connected to the first buckle A611. The adjustment portion A622 is provided on the extension belt A621, and is used to adjust the available length of the extension belt A621. The third connection end A624 located at the other end of the extension belt A621 is generally a hook, which can be detachably engaged with a suitable structure of a vehicle seat (such as a connecting rod on the top of the vehicle seat or the backrest), thereby fixing the bracket device A31 to the vehicle seat. It can be understood that in some embodiments, the adjustment portion A622 can also be omitted.

[0338] Specifically, combined Figure 103 to Figure 105 , the following will take the case where the above-mentioned carrier 30 is used alone (for example, the carrier 30 is placed and installed on a vehicle seat) as an example to explain the use principle of the carrier 30. When the carrier 30 is in use, the carrier 30 is first placed on the vehicle seat, and then the two restraint belts A613 are respectively passed through the two belt guide mechanisms A33 arranged on the first bracket A32 along the front-to-back direction, that is, the second direction F2, and then the second connection end A615 under the shielding net A614 is engaged with the long rod A323 of the first bracket A32. Specifically, the restraint belt A613 is inserted into the penetration channel A331 from the side introduction port A3313, the first end of the restraint belt A613 is connected to the first buckle A611, and the second end of the restraint belt A613 passes through the second port A3312 and is connected to the first connection end A612. Next, the third connecting end A624 of the extension component A62 is engaged with the connecting rod on the top or backrest of the vehicle seat, and finally the first buckle A611 at the top of the two restraint belts A613 is engaged with the second buckle A623 of the extension component A62, so that the bracket device A31 is fixed more firmly to the vehicle seat.

[0339] In some embodiments, Figure 103 to Figure 105As shown, the carrier 30 includes four belt guide mechanisms A33, wherein two belt guide mechanisms A33 are arranged at intervals from the other two belt guide mechanisms A33 along the second direction F2, which is equivalent to that each second bracket A34 is provided with two belt guide mechanisms A33. Specifically, the two belt guide mechanisms A33 located in the front (rear) are arranged at intervals along the left-right direction, i.e., the first direction F1, which is equivalent to that each two ends of each second bracket A34 are provided with a belt guide mechanism A33. When the carrier 30 is placed on a vehicle seat, one of the two belt guide mechanisms A33 located on the same second bracket A34 is closer to the backrest of the vehicle seat than the other. The following will take the use process of a restraint belt A613 as an example to illustrate the use principle of the carrier 30.

[0340] In some embodiments, Figure 103 to Figure 105 As shown, the restraint belt A613 acts on the belt guide mechanism A33 on the second bracket A34 away from the vehicle seat back. Specifically, the restraint belt A613 extends from the upper shell A3321 and the bearing part A801 ​​( Fig.105 Not shown, see Fig.79 ) through the passage A331. The first end of the restraint belt A613 passes through the first port A3311, and extends around the outer side of the first bracket A32 and then extends upward and backward. The first buckle A611 is connected to the first end of the restraint belt A613. The second end of the restraint belt A613 passes through the second port A3312, and extends backward from the lower side of the second bracket A34 and the support rod A322. The first connecting end A612 is connected to the second end of the restraint belt A613.

[0341] Of course, in some other alternative embodiments, the restraint belt A613 can act on the two belt guide mechanisms A33 on the second bracket A34 at the same time. Specifically, first with respect to the belt guide mechanism A33 relatively close to the vehicle seat back, the restraint belt A613 can pass through the penetration channel A331 between the upper shell A3321 of the belt guide mechanism A33 and the bearing portion A801, and the second end of the restraint belt A613 passes through the first port A3311 and extends backward, and the second end of the restraint belt A613 is connected to the first connection end A612. The first end of the restraint belt A613 extends between the second bracket A34 and the bearing portion A801 ​​along the guide direction of the second connecting rod A342 to the belt guide mechanism A33 relatively far from the vehicle seat back, and then the restraint belt A613 enters the penetration channel A311 from the second port A3312 of the belt guide mechanism A33, and passes through the first port A3311, then extends around the outer side of the first bracket A32, and then extends upward and backward, and the first buckle A611 is connected to the first end of the restraint belt A613. Of course, in other alternative embodiments, the first end of the restraint belt A613 may also first pass through the belt guide mechanism A33 relatively far from the vehicle seat back, the first buckle A611 is connected to the first end of the restraint belt A613, the second end of the restraint belt A613 extends along the guide direction of the second connecting rod A342 to pass through the belt guide mechanism A33 relatively close to the vehicle seat back, and the first connecting end A612 is connected to the second end of the restraint belt A613.

[0342] According to the above description, when the second bracket A34 is set on the support rod A322, it can be connected with the belt guide mechanism A33 located at both ends of the support rod A322 to form an effective support for the belt guide mechanism A33, thereby improving the structural strength of the belt guide mechanism A33. In addition, when the restraint belt A613 acts on the belt guide mechanism A33 at both ends of the support rod A322 at the same time, the second bracket A34 (specifically, the second connecting rod AA342) also has a guiding function, which can make the restraint belt A613 passing through one of the belt guide mechanisms 33 move to the other belt guide mechanism A33 along the extension direction of the second connecting rod A342, and then can accurately and quickly pass through the other belt guide mechanism A33.

[0343] Depend on Fig.99It can be seen that the opening directions of the side inlets A3313 of the two guide mechanisms A33 spaced apart in the second direction F2 are opposite to each other, and the side inlets A3313 of each guide mechanism A33 are respectively oriented toward the adjacent short sides A321. In this way, on the one hand, it is convenient for each restraint belt A613 to enter the corresponding channel A331 through the side inlet A3313, and on the other hand, it can effectively avoid the problem that the two restraint belts A613 cannot reliably fix the bracket device A31 due to the two restraint belts A613 sliding out of the side inlet A331 and gathering together. Of course, in some alternative embodiments, the opening directions of the side inlets A3313 of the two guide mechanisms A33 spaced apart in the second direction F2 can be opposite to each other.

[0344] See also Fig.106 In some embodiments, the front wheel assembly 12 and the rear wheel assembly 14 both include an adapter 11, a wheel seat 13, a caster 15 and a brake assembly 17. Fig.106 The figure shows an exemplary embodiment of the connection between the rear wheel assembly 14 and the rear support frame 24 in this embodiment. The adapter 11 is fixed to the bottom of the rear support frame 24, specifically to the bottom end of the rear rod 241. The wheel seat 13 is pivotally connected to the adapter 11. The caster 15 is pivotally connected to the wheel seat 13. The brake assembly 17 can simultaneously limit the rotation of the wheel seat 13 relative to the adapter 11 and limit the rotation of the caster 15 relative to the wheel seat 13, thereby achieving the braking and direction locking of the caster 15.

[0345] The structures of the adapter 11, the wheel seat 13, the caster 15 and the brake assembly 17 can be referred to in the above related Figures 34 to 43 The structure and working principle of these components are the same as above and will not be described in detail here. Fig.107 A perspective view of the brake spring 174 is also shown.

[0346] See also Fig.108 One aspect of the present invention provides a buckle that can be applied to a carrier. The buckle includes a male buckle and a female buckle, and the male buckle and the female buckle are respectively connected to the webbing. For example, the male buckle can be connected to the webbing used as a shoulder strap, and the female buckle can be connected to the webbing used as a crotch strap. Of course, the webbing connected to the male buckle and the female buckle can be interchangeable and can also be connected to other webbings. When a child rides in the carrier, by engaging and locking the male buckle and the female buckle together, two different webbings can be connected together, thereby keeping the child in the carrier to prevent the child from escaping from the carrier.

[0347] Fig.108 FIG. 2 shows a first example of a buckle E1 according to the present invention. The buckle E1 includes a male buckle E10 and a female buckle E20. Fig.108 , the male fastener E10 and the female fastener E20 are in a separated state. Figures 109 to 111The male fastener E10 and the female fastener E20 are shown in an engaged state. The male fastener E10 includes a tongue piece E11. The tongue piece E11 can be inserted into the female fastener E20, and the female fastener E20 can receive and releasably lock the tongue piece E11.

[0348] Combination Fig.112 The tongue piece E11 of the male fastener E10 has a locking hole E111, which can be engaged with a locking device in the female fastener E20 and locked by the locking device to keep the tongue piece E11 in the female fastener E20. The male fastener E10 also includes a male fastener connecting portion E101, which is provided with a male fastener belt hole E102 for connecting the first webbing.

[0349] The tongue piece E11 may be a single component formed in one piece, and the male fastener connecting part E101 may also be a single component formed in one piece. The tongue piece E11 may be made of, for example, a metal material. The male fastener connecting part E101 may be made of, for example, a plastic material. The tongue piece E11 and the male fastener connecting part E101 may be connected together by any known technique, such as welding, riveting, bonding, etc., as long as the tongue piece E11 and the male fastener connecting part E101 are firmly connected, which will not be described in detail here.

[0350] The male fastener E10 can be composed of only two parts, that is, only the tongue-shaped piece E11 and the male fastener connecting portion E101. The tongue-shaped piece E11 is provided with a locking hole E111 to cooperate with the locking device in the female fastener E20 to achieve the insertion and locking of the male fastener E10 and the female fastener E20. Such a male fastener has a simple structure, can be easily produced and processed, and reduces costs.

[0351] The female fastener E20 includes a female fastener housing E21, one end of which has a socket E24 suitable for inserting the tongue piece E11 (see Fig.115 and Fig.118 ). The female fastener E20 also includes a female fastener connecting portion E201, which is provided with a female fastener belt hole E202 for connecting the second webbing. The female fastener housing E21 includes a housing body E22 and a cover plate E23 that are connected to each other. A reinforcing fixing member E25, a locking member E26, a guide member E28, an elastic reset member E27 and other components are provided in the female fastener housing E21. The female fastener E20 also includes a release member E29, a portion of which is exposed from the outer surface of the cover plate E23 for user operation. The release member E29 can be operated, for example, by the user pressing the release member E29 to release the tongue-shaped piece E11 of the male fastener E10 locked by the female fastener E20 from the female fastener E20, so that the tongue-shaped piece E11 of the male fastener E10 can be pulled out of the female fastener E20.

[0352] Reference Fig.113, the cover plate E23 is provided with an opening E231, and the top of the release piece E29 can protrude from the cover plate E23 through the opening E231. The cover plate E23 includes a cover plate extension E2301, and the cover plate extension E2301 is provided with a cover plate belt hole E2302. The shell body E22 includes a shell body extension E2201, and the shell body extension E2201 is provided with a shell body belt hole E2202. When the shell body E22 and the cover plate E23 are assembled together, the cover plate belt hole E2302 and the shell body belt hole E2202 cooperate to form the female fastener belt hole E202. The shell end wall E221 of the shell body E22 and the cover plate end wall E232 of the cover plate E23 define a socket E24 (see Fig.115 and Fig.118 The housing body E22 and the cover plate E23 may be made of the same material, such as plastic. The housing body E22 and the cover plate E23 may also be made of different materials.

[0353] The shell body E21 has a peripheral wall E222 including a shell end wall E221. The shell body E21 has an open top, and its top can be closed by a cover plate E23. The top edge of the shell end wall E221 is provided with a notch to form a socket E24. The peripheral wall E222 of the shell body E21 defines a first accommodating cavity E225 in the upper part of the shell body E21. The reinforcing fixture E25 is accommodated in the first accommodating cavity E225, that is, the reinforcing fixture E25 is recessed in the shell body E21. When the shell body E22 and the cover plate E23 are assembled together, the reinforcing fixture E25 is accommodated between the shell body E22 and the cover plate E23. The outer edge of the reinforcing fixture E25 can be basically close to the side wall of the first accommodating cavity E225, that is, the peripheral wall E222 of the shell body E21, so that the horizontal movement of the reinforcing fixture E25 in the first accommodating cavity E225 is limited. In addition, the reinforcing fixture E25 can be fixed to the shell body E22 by fasteners, so that the reinforcing fixture E25 remains fixed relative to the shell body E22.

[0354] like Fig.113 As shown, the cover plate E23 can be connected to the housing body E22 by a plurality of fasteners E30, and these fasteners E30 pass through the reinforcing fixing member E25 so that the reinforcing fixing member E25 is fixed between the cover plate E23 and the housing body E22. The reinforcing fixing member E25 can be made of, but not limited to, metal.

[0355] A reinforcing fixing member belt hole E251 is provided at a position corresponding to the female buckle belt hole E202 of the reinforcing fixing member E25, and the size of the reinforcing fixing member belt hole E251 matches the shape and size of the female buckle belt hole E202. Specifically, the shape of the reinforcing fixing member belt hole E251 is substantially the same as the shape of the female buckle belt hole E202, and the size of the reinforcing fixing member belt hole E251 is also substantially the same as the size of the female buckle belt hole E202. The second webbing passing through the female buckle belt hole E202 can pass through the reinforcing fixing member belt hole E251 at the same time.

[0356] In some embodiments not shown, the formation of the female fastener hole E202 may also have other implementations. For example, the shell body E21 is not provided with the main body extension E2201 or the cover plate E23 is not provided with the cover plate extension E2301, and the female fastener hole E202 is formed by only one of the shell body E21 or the cover plate E23. In this case, the reinforcing fastener E25 may omit the reinforcing fastener hole E251 accordingly.

[0357] See also Fig.113 and Fig.115 , a tongue-shaped piece accommodating cavity E226 for accommodating the tongue-shaped piece E11 is formed between the bottom surface of the reinforcing fixing piece E25 and the lower part of the shell body E22. The tongue-shaped piece accommodating cavity E226 is formed below the reinforcing fixing piece E25 and above the bottom wall E224 of the shell body E22. When the tongue-shaped piece E11 is inserted into the female fastener shell E21 via the socket E24, the tongue-shaped piece accommodating cavity E226 is used to accommodate the tongue-shaped piece E11. The locking protrusion E261 can have a first position and a second position. In this example, the first position is above the second position. When the locking protrusion E261 is in the first position, the locking protrusion E261 protrudes in the tongue-shaped piece accommodating cavity E226, and the locking piece E26 engages or disengages with the tongue-shaped piece E11. More specifically, when the locking protrusion E261 is in the first position, the locking protrusion E261 is located in the moving track of the tongue-shaped piece E11 and can engage with the tongue-shaped piece, so that the tongue-shaped piece E11 cannot be directly pulled out. When the locking protrusion E261 is in the second position, the locking protrusion E261 withdraws from the tongue-shaped piece accommodating cavity E226 to allow the tongue-shaped piece E11 to be inserted or pulled out. More specifically, when the locking protrusion E261 is in the second position, the locking protrusion E261 withdraws from the moving track of the tongue-shaped piece E11 without interfering with the insertion or pulling out of the tongue-shaped piece E11.

[0358] The reinforcing fixing member E25 has a first vertical portion E252 and a second vertical portion E253 which are parallel to each other (see Fig.115 and Fig.118). The first vertical portion E252 is formed by bending one end of the reinforcing fixing member E25 adjacent to the socket E24 and extending toward the bottom wall E225 of the shell body E22. The first vertical portion E252 abuts against the shell end wall E221 of the shell body E22, and is provided with a first limiting opening E2521 suitable for the tongue-shaped piece E11 to pass through. The second vertical portion E253 is formed in the middle part of the reinforcing fixing member E25, and is the same as the first vertical portion E252, and is also facing the bottom wall E225 of the shell body E22. The second vertical portion E253 has a second limiting opening E2531 suitable for the tongue-shaped piece E11 to pass through. The first limiting opening E2521 and the second limiting opening E2531 are at the same distance relative to the main body of the reinforcing fixing member E25, that is, they are located at the same height. The first limiting opening E2521 and the second limiting opening E2531 are aligned with each other in the longitudinal direction of the shell body E22, and are also aligned with the socket E24. The size of the first limiting opening E2521 and the second limiting opening E2531 is slightly larger than the cross-sectional size of the widest part and / or the thickest part of the tongue-shaped piece E11. The first limiting opening E2521 provides guidance for the tongue-shaped piece E11 to be inserted into the tongue-shaped piece receiving cavity E226 and to pass over the locking piece E26, and when the tongue-shaped piece E11 is engaged with the locking piece E26, the first limiting opening E2521 and the second limiting opening E2531 limit the tongue-shaped piece E11, thereby preventing the tongue-shaped piece E11 from shaking in the tongue-shaped piece receiving cavity E226. The reinforcing fixing piece E25 can be made of a metal material, or made of a non-metallic material such as a fiber-reinforced composite material.

[0359] like Fig.113 As shown, the shell body E22 has two vertical walls E2241 extending vertically upward from the bottom wall E225 of the shell body E22, and the two vertical walls E2241 define the second accommodating chamber E227. The locking member E26 and the elastic reset member E27 are both located in the second accommodating chamber E227. The locking member E26 can be slidably installed in the second accommodating chamber E227 in the vertical direction. The sliding direction of the locking member E26 is, for example, perpendicular to the moving direction of the tongue-shaped piece E11. The elastic reset member E27 is located below the locking member E26, and the bottom wall E225 provides support and positioning for the base of the spring. The elastic reset member E27 is suitable for biasing the locking member E26 so that the locking member E26 has a tendency to move upward. In particular, the elastic reset member E27 is suitable for pushing the locking member E26 upward so that the locking member E26 engages with the tongue-shaped piece E11.

[0360] The locking member E26 is fixed by both the reinforcing fixing member E25 and the shell body E22. Specifically, the female fastener E20 includes two guide members E28. The bottom ends of the two guide members E28 are respectively installed in the two vertical walls E2241. The top ends of the two guide members E28 can also be respectively installed in the corresponding vertical walls located on the cover plate E23. The locking member E26 has two arms E262 extending outward, and the two arms E262 are respectively slidably accommodated in the two guide members E28. The cross section of the guide member E28 is C-shaped, and a sliding channel E281 suitable for accommodating the arm E262 and allowing the arm E262 to slide is formed. The reinforcing fixing member E25 is provided with two rectangular holes E254, and the two guide members E28 extend through the two rectangular holes E254 respectively. In some embodiments, the size of the rectangular hole E254 matches the size of the guide member E28 so that the guide member E28 remains vertical relative to the bottom wall 225 of the shell body 22. The locking member E26 can slide in the vertical direction through two vertically arranged guide members E28. Fig.116 In some embodiments, the size of the rectangular hole E254 is larger than the size of the guide member E28, and the rectangular hole E254 can allow the guide member E28 and the arm E262 to pass through. In addition, the two guide members E28 limit the locking member E26 in the longitudinal direction T2 and the transverse direction T1 (T1 and T2 are shown in FIG. Fig.114 ) on the move.

[0361] See also Fig.113 In some embodiments, the size of the rectangular hole E254 may be larger than the size of the guide member E28, and each guide member E28 is in contact with a portion of the hole wall of the corresponding rectangular hole E254, for example, in contact with a portion of the hole wall of three adjacent rectangular holes E254. The vertical wall E2241 is formed with a groove structure E2240 for accommodating the guide member E28, and bosses E2242 are provided on two opposite side walls of the groove structure E2240. The space between the boss E2242 and the bottom wall of the groove structure E2240 is suitable for clamping with the side wall of the guide member E28 to stably hold the guide member E28 in the groove structure E2240.

[0362] In some embodiments, the vertical wall of the cover plate E23 may also be formed with a groove structure for accommodating the guide member E28, and the groove structure may also be provided with a boss for clamping with the side wall of the guide member E28, so that the top of the guide member E28 can be stably maintained in the groove structure formed by the vertical wall of the cover plate E23.

[0363] The locking member E26 is configured to operably retain the tongue piece E11 in the tongue piece receiving cavity E226 in a releasable manner. The locking member E26 has a locking protrusion E261, which is adapted to protrude into the locking hole E111 so that the locking member E26 engages with the tongue piece E11. The end of the locking protrusion E261 close to the socket E24 has a driving slope E263, which gradually rises from the front edge of the locking member E26 to the rear edge of the locking member E261 to allow the tongue piece E11 to be inserted into the tongue piece receiving cavity E226 and pass over the locking protrusion E261. The rear end of the locking protrusion E261 drops sharply to prevent the tongue piece E11 from detaching from the locking member E26 when the locking protrusion E261 protrudes into the locking hole E111.

[0364] The release member E29 is configured to be operable, for example, to be pressable, and when operated, causes the locking protrusion E261 of the locking member E26 to disengage from the tongue-shaped piece E11. The release member E29 includes a release member body E291 and two push rods E292 extending downward. The release member body E291 is located between the cover plate E23 and the reinforcing fixing member E25. Fig.116 , the two push rods E292 pass through the two rectangular holes E254 of the reinforcing fixing piece E25 respectively, and the ends thereof abut against the locking piece E26. The two push rods E292 are suitable for pushing the locking piece E26 out of engagement with the locking hole E111 when the release piece E29 is operated, for example, pressed. The elastic return piece E27 is retractable. When the locking piece E26 is pushed downward, the elastic return piece E27 contracts so that the locking piece E26 can move downward, at which time the locking protrusion E261 of the locking piece E26 will disengage from the locking hole E111, so that the tongue piece E11 can be released from the locking piece E26. Fig.113 In the illustrated embodiment, the elastic reset member E27 is a coil spring. In some other embodiments, the elastic reset member E27 may be a leaf spring, a disc spring, a shaped spring or other types of springs. In some other embodiments, the elastic reset member E27 may also be other elastic members with elasticity.

[0365] Figures 114 to 116The buckle E1 is shown in a case where the release member E29 is not pressed when the male fastener E10 is engaged with the female fastener E20. When the locking protrusion E261 of the locking member E26 is engaged with the locking hole E111 of the tongue piece E11, the tongue piece E11 cannot be pulled out of the female fastener E20 until the release member E29 is pressed. In a case where the release member E29 is not pressed, if the male fastener E10 and / or the female fastener E20, or the first webbing and / or the second webbing is pulled in a direction opposite to the direction of engaging the male fastener E10 with the female fastener E20, the pulling force will be transmitted to the locking member E26, and the force applied to the locking member E26 will be transmitted to the two guide members E28 through the two arms E263 of the locking member E26, respectively. Since the guide member E28 is installed on the shell body E22 and the cover plate E23, and is reinforced by the reinforcing fixing member E25, and the reinforcing fixing member E25 is tightly fixed between the shell body E22 and the cover plate E23, the tension applied to the tongue piece E11 can be applied to the entire female fastener shell E21.

[0366] Figures 117 to 119 The buckle E1 is shown in a state where the release member E29 is pressed down after the male fastener E10 is engaged with the female fastener E20. When the release member E29 is pressed down, the push rod E292 pushes the locking member E26 downward, and the locking member E26 transmits the thrust received to the elastic return member E27, which is forced to contract, thereby allowing the locking member E26 to move downward. The downward movement of the locking member E26 causes the locking protrusion E261 entering the locking hole E112 to leave the locking hole E112, whereby the locking protrusion E261 will be disengaged from the tongue-shaped piece E11, thereby releasing the lock on the tongue-shaped piece E11.

[0367] The female fastener E20 has a simple structure and only requires one reinforcing fastener to ensure sufficient strength. Compared with existing fasteners, the fastener proposed by the present invention requires fewer parts, has low cost, is easy to manufacture, and reduces assembly processes, thereby improving production and assembly efficiency. In addition, the fastener proposed by the present invention is light in weight and easy to operate.

[0368] Fig.120 and Fig.121 The male fastener and the female fastener of the second example of the fastener according to the present invention are respectively shown. The difference between the fastener in the second example and the fastener in the first example is that an anti-foolproof structure is added. Except for the anti-foolproof structure, the fastener in the second example has the same structure as the fastener in the first example, and the same parts will not be repeated, and the reference numerals applied to the fastener in the first example are also applied to the fastener in the second example.

[0369] like Fig.120As shown, on the first surface E112 of the tongue-shaped piece E11 of the male fastener E10 there is an anti-fool boss E41 extending from the male fastener connecting portion E101 toward the tongue-shaped piece E11. Fig.121 As shown, the cover plate end wall E232 of the cover plate E23 of the female fastener E20 is provided with an anti-mistake notch E42 adjacent to the upper edge E241 of the socket E24. Fig.122 The cover plate E23 is shown to be provided with a foolproof notch E42. The size of the foolproof notch E42 is slightly larger than the size of the foolproof boss E41, so the foolproof boss E41 can enter or pass through the foolproof notch E42.

[0370] In this example, the foolproof notch E42 is located at the cover plate end wall E232 of the cover plate E23. In other examples, the foolproof notch E42 may also be located at the shell end wall E222 of the shell body E22, and correspondingly, the foolproof boss E41 is located at the second surface of the tongue-shaped piece E11 opposite to the first surface E112. In other words, the foolproof notch E42 may be located on the side where the cover plate E23 is located in the female fastener shell E21, or on the side where the shell body E22 is located, and the foolproof boss E41 may be located on the first surface of the tongue-shaped piece E11, or on the second surface of the tongue-shaped piece E11, respectively. The implementation methods of the foolproof boss and the foolproof notch are not limited to the implementation methods exemplified above, and it can be understood that the foolproof boss and the foolproof notch may adopt other implementation methods as long as the foolproof function can be achieved. For example, when the foolproof notch E42 is located on the side where the cover plate E23 is located in the female fastener housing E21, in addition to the notch formed in the cover plate end wall E232 of the cover plate E23, the first vertical portion E252 of the reinforcing fixture E25 adjacent to the socket E24 is also notched, and the notch of the first vertical portion E252 is located above the first limiting opening E2521 and corresponds to the notch of the cover plate end wall E232 in position. The notch of the cover plate end wall E232 and the notch of the first vertical portion E252 together form a foolproof notch.

[0371] The foolproof notch E42 is suitable for the foolproof boss E41 to enter or pass through to define the direction of the tongue piece E11 of the male fastener E10 when it is inserted into the female fastener E20. Specifically, only when the male fastener E10 is inserted into the female fastener E20 in the forward direction, the foolproof structure composed of the foolproof boss E41 and the foolproof notch E42 allows the tongue piece E11 of the male fastener E10 to engage with the locking piece E26 of the female fastener E20, and when the male fastener E10 is inserted into the female fastener E20 in the reverse direction, the foolproof structure prevents the tongue piece E11 of the male fastener E10 from engaging with the locking piece E26 of the female fastener E20.

[0372] Figure 123 to Figure 125The buckle E1 is shown when the male fastener E10 is forwardly inserted into the female fastener E20. When the tongue piece E11 of the male fastener E10 is inserted into the socket E24 with its first surface E112 having the foolproof boss E41 facing the cover plate E23, the foolproof boss E41 enters the foolproof notch E42 to allow the tongue piece E11 to be further inserted into the socket E24 until the tongue piece E11 is engaged with the locking piece E26.

[0373] Figure 126 to Figure 127 The buckle E1 is shown when the male fastener E10 is reversely inserted into the female fastener E20. When the tongue piece E11 of the male fastener E10 is inserted into the socket E24 with its second surface E113 opposite to the first surface E112 facing the cover plate E23, the housing end wall E221 of the housing body E22 abuts against the foolproof boss E41 to block the tongue piece 11 from further inserting into the socket E24. At this time, the tongue piece E11 cannot engage with the locking piece E26.

[0374] Due to the setting of the foolproof structure, it is possible to avoid the situation where the male fastener E10 is installed reversely relative to the female fastener E20, thereby ensuring the safety of the fastener. In addition, when the male fastener E10 is installed reversely relative to the female fastener E20, since the male fastener E10 cannot be locked, the user can be reminded that the male fastener E10 is installed reversely relative to the female fastener E20, and accordingly turn over the male fastener E10 to install it again.

[0375] In the above embodiment, the foolproof boss E41 is provided on the male fastener E10, and the foolproof notch E42 is provided on the female fastener E20. In other embodiments, the foolproof boss E41 can be provided on the female fastener E20, and the foolproof notch E42 can be provided on the male fastener E10. In addition, the male fastener E10 and the female fastener E20 can be provided with the foolproof boss E41 and the foolproof notch E42 at the same time. For example, the first surface E112 of the male fastener E10 is provided with a first foolproof boss, the second surface E113 is provided with a first foolproof notch, the cover plate end wall E232 of the cover plate E23 of the female fastener E20 is provided with a second foolproof notch, and the shell end wall E221 of the shell body E22 is provided with a second foolproof boss, and vice versa. In addition, the number of the foolproof bosses and foolproof notches can be multiple.

[0376] Another aspect of the present invention provides a carrier. The carrier includes a first webbing, a second webbing and the buckle E1 described in the above aspect. The first webbing is connected to the male fastener E10 of the buckle E1, and the second webbing is connected to the female fastener E20 of the buckle E1. The carrier according to the present invention can be used to carry people such as children, and can also be used to carry pets, etc. The carrier includes various tools suitable for carrying people or pets, such as strollers, safety seats, baskets, stretchers, sleeping boxes, etc. The above are only some examples of the carrier according to the present invention, and the carrier according to the present invention is not limited to this. When a child or a pet is riding in the carrier, the male fastener E10 of the buckle E1 and the female fastener E20 are engaged and locked together, so that the first webbing and the second webbing can be connected together, thereby keeping the child or pet in the carrier to prevent the child or pet from escaping from the carrier.

[0377] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned 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. For example, Figures 57-61 as well as Figure 64-72 The buckle assembly shown can be applied to any embodiment of the carrier (such as Figure 10-11 , Figure 44-49 , Fig.88 , Figure 103-105 For example, Figure 50-105 The carrier shown in FIG. 1 can be connected to the Figure 1-49 The frame 20 is engaged. For example, Figure 1-78 The carrier shown in FIG. 1 can be provided with a corresponding second locking mechanism A40 and Figure 79 to Figure 105 For example, Figures 108 to 127 The buckle shown can be substituted for Figures 71-72 The combination of technical features of different embodiments of the present application will not be described in detail here.

[0378] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A wheeled mobile device, characterized in that: include: Carrying frame; A carrier, detachably mounted on the carrier frame; and A clamping mechanism, used to detachably clamp the carrier on the carrier frame; the clamping mechanism has a clamping state and a release state, when the clamping mechanism is in the clamping state, the carrier is locked with the clamping mechanism, when the clamping mechanism is in the release state, the carrier can be separated from the clamping mechanism; The engaging mechanism includes an engaging member and a slot, the carrier includes an engaging rod accommodated in the slot, and the engaging member can move between a first position extending into the slot to fix the engaging rod in the slot and a second position withdrawing from the slot to allow the engaging rod to detach from the slot.

2. The wheeled mobile device according to claim 1, characterized in that: The engaging member includes a latch tongue and an operating portion that are connected to each other. The operating portion can be operated to drive the latch tongue to move between the first position of extending into the slot and the second position of exiting the slot. One end of the latch tongue has a guiding slope that contacts the engaging rod.

3. The wheeled mobile device according to claim 1, characterized in that: The carrier comprises a belt guiding mechanism arranged on the engaging rod, the engaging mechanism is further provided with a limiting notch communicated with the engaging slot, and the belt guiding mechanism is positioned within the limiting notch.

4. The wheeled mobile device according to claim 2, characterized in that: The engaging rod can move between a third position close to the latch tongue and a fourth position away from the latch tongue in the latch slot. When the engaging rod is located at the third position, the engaging member fixes the engaging rod in the latch slot; when the engaging rod is located at the fourth position, the engaging rod is separated from the engaging member. When the engaging member is at the first position, the distance between the engaging tongue and the side wall of the engaging slot is greater than the width of the engaging rod.

5. The wheeled mobile device according to claim 1, characterized in that: include: A wheel assembly, including a front wheel assembly and a rear wheel assembly; The frame comprises a front rod connected to the front wheel assembly and a rear rod connected to the rear wheel assembly; one of the front rod and the rear rod is pivotally connected to the carrier frame to form a first pivot point, and the front rod and the rear rod are pivotally connected to each other to form a second pivot point; the frame has an unfolded state and a folded state; Optionally A first locking mechanism is disposed between the frame and the carrier; the first locking mechanism comprises a first fixing seat and a second fixing seat pivotally connected to each other to form a third pivot point; the first fixing seat is fixed to the other of the front rod and the rear rod; the second fixing seat is pivotally connected to the carrier to form a fourth pivot point; The first locking mechanism has a locked state and an unlocked state. When the first locking mechanism is in the locked state, the first fixing seat and the second fixing seat are relatively fixed, and the frame can be locked in the unfolded state. When the first locking mechanism is in the unlocked state, the first fixing seat and the second fixing seat can rotate relative to each other, allowing the frame to switch between the unfolded state and the folded state.

6. The wheeled mobile device according to claim 5, characterized in that: The first locking mechanism further includes a first locking member, a first locking groove, a second locking groove and an unlocking member; the first locking groove is disposed on the first fixing seat, and the second locking groove is disposed on the second fixing seat; When the first locking mechanism is in the locked state, the first locking piece is simultaneously locked with the first locking groove and the second locking groove; the unlocking piece is movably installed on the first fixed seat, and the unlocking piece can drive the first locking piece to disengage from one of the first locking groove and the second locking groove, so that the first locking mechanism is converted from the locked state to the unlocked state.

7. A carrier, characterized in that: include: A bracket device, comprising a first bracket and a second bracket connected to each other; the first bracket comprises two short rods and two long rods connected in sequence, and a support rod connected between the two long rods; the second bracket comprises a first connecting rod, and the first connecting rod is arranged on the support rod; as well as At least one belt guiding mechanism is connected between the long rod and the first connecting rod, and the belt guiding mechanism is used to cooperate with the fixing belt assembly to fix the bracket device on the seat.

8. The carrier according to claim 7, characterized in that: There are two first connecting rods, and the two first connecting rods are arranged on the support rod at intervals along the length direction of the support rod; The second bracket further includes a second connecting rod, and the second connecting rod is connected between the two first connecting rods; And / or, the two belt guiding mechanisms are respectively arranged at two ends of the support rod, and the two belt guiding mechanisms are respectively connected between the corresponding first connecting rod and the corresponding long rod.

9. The carrier according to claim 8, characterized in that: The fixing belt assembly includes a restraining belt assembly, and the restraining belt assembly includes at least one restraining belt; The belt guiding mechanism includes a clamp body, which includes an upper shell and a lower shell connected to the upper shell, the upper shell and the lower shell together define a penetration channel, and the penetration channel has a first port and a second port for the restraining belt to pass through; the upper shell is fixed to the first connecting rod, and the lower shell is fixed to the long rod.

10. The carrier according to claim 9, characterized in that: In the two belt guide mechanisms provided at both ends of the support rod, when the restraint belt passes through the belt guide mechanism away from the seat back, one end of the restraint belt passes through the first port and extends around the outer side of the first bracket; the other end of the restraint belt passes through the second port and extends from the second bracket and the lower side of the support rod; Alternatively, when the restraint belt passes through the two belt guiding mechanisms arranged at both ends of the support rod, the restraint belt is passed between the second bracket and the load-bearing part of the covering and extends along the guide direction of the second connecting rod, and the two ends of the restraint belt respectively pass through the two belt guiding mechanisms and extend from the outside of the first bracket.

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