Foldable cart

Abstract

A foldable trolley comprising a frame (100) and wheels (200) attached to the underside of the frame (100), characterized in that the frame (100) has a folded state and an unfolded state, the frame (100) comprising: A front support assembly (110), the front support assembly (110) having a front connecting rod unit (111) at the lower end; A rear support assembly (120), the rear support assembly (120) being arranged opposite the front support assembly (110) from front to rear, the rear support assembly (120) being provided with a rear connecting rod unit (121) at the lower end; A lower support assembly (130), the lower support assembly (130) comprising a first lower support unit (131) and a second lower support unit (132), the first lower support unit (131) being pivotally connected at a first end to a lower end of the front support assembly (110), the second lower support unit (132) being pivotally connected at a first end to a lower end of the rear support assembly (120), the second end of the first lower support unit (131) being rotatably connected to the second end of the second lower support unit (132); Support bracket assembly (140), wherein the support bracket assembly (140) comprises a first support bracket unit (141), a second support bracket unit (142), a first pivot rod unit (143), and a second pivot rod unit (144), wherein the first support bracket unit (141) is pivotally connected at its first end to the lower end of the front connecting rod unit (111), the second support bracket unit (142) is rotatably connected at its first end to the lower end of the rear connecting rod unit (121), the first support frame unit (141) is rotatably connected at its second end to the second end of the second support frame unit (142), the first pivot rod unit (143) is rotatably connected at its two ends to the first lower support unit (131) and to the first support frame unit (141), respectively, and the second pivot rod unit (144) is rotatably connected to the second lower support unit (132) and the second support frame unit (142) is connected at both ends.

Description

CROSS REFERENCE TO RELATED APPLICATIONSThis application claims priority to a Chinese patent application entitled "A foldable cart" and Serial No. 2024219348557 filed on August 9, 2024.TECHNICAL FIELDThe present application relates to the technical field of baby products, in particular to a foldable baby stroller.BACKGROUND ARTWith the development of society and improvement of human life standard, outdoor recovery has become a popular form of exercise and recreational design, and more parents and other educational authorities prefer to accompany infants and infants in their recreational for outdoor playing. As a kind of infant product suitable for outdoor playing, the baby carriage not only enables infants and infants to sit and lie in the baby carriage, which is convenient for the children to play, but also offers room for some outdoor accessories, making the baby carriage an energy-saving and practical transportation means.In the existing technology, the bar of the cart is more, the foldable parts are complex, the folding operation is cumbersome, and in the process of folding the cart is also very easy to clip the fingers of the user; and, like folds of cart products in the folding of the volume is still large, it is inconvenient to carry, and in the folded state is also not stable, and easily deformed.In this regard, the present application provides a folding cart, can effectively solve the above problems, its structure is simple, the folded product size is small, and stable.CONTENT OF THE APPLICATIONIn order to overcome the deficiencies of the existing art, the present application provides a folding cart having a simple structure, and the folded product is small and stable.The technical solution that the application uses to solve the technical problems is as follows:A foldable cart comprising a frame and wheels mounted on the underside of the frame, characterized in that the frame has a folded state and an unfolded state, the frame comprising:A front bracket assembly, the front bracket assembly having a front connecting rod unit at the lower end;A rear bracket assembly, wherein the rear bracket assembly is disposed front to rear opposite the front bracket assembly, and the rear bracket assembly is provided at the lower end with a rear tie rod unit;A lower bracket assembly, the lower bracket assembly comprising a first lower bracket unit and a second lower bracket unit, the first lower bracket unit rotatably coupled to the lower end of the front bracket assembly, the second lower bracket unit rotatably coupled to the lower end of the rear bracket assembly at its first end, and the first lower bracket unit rotatably coupled to the second end of the second lower bracket unit at its second end;A support bracket assembly, the support bracket assembly comprising a first support bracket unit, a second support bracket unit, a first pivot rod unit, and a second pivot rod unit, the first support bracket unit being rotatably coupled at its first end to the lower end of the front link rod unit, the second support bracket unit being rotatably coupled at its first end to the lower end of the rear link rod unit, the first support bracket unit being rotatably coupled at its second end to the second end of the second support frame unit, both ends of the first pivot rod unit being rotatably connected to the first lower bracket unit and the first support frame unit, respectively, and the second end of the first support frame unit being rotatably connected to the second end of the second support frame unit, wherein both ends of the first rotary rod unit are rotatably connected to the first lower support unit and the first support frame unit, respectively, and both ends of the second rotary rod unit are rotatably connected to the second lower support unit and the second support frame unit, respectively.As an improvement of the application, the first lower bracket unit includes a first limiting member provided at a second end, the second lower bracket unit is rotatably connected to the first limiting member at a second end, and the first limiting member resists the second lower bracket unit when the frame is in an expanded state.An improvement of the present application is that a first locking member is provided in the second end of the second lower bracket unit, that the locking end of the first locking member is unscrewed from the side wall of the second end of the second lower bracket unit, that the first limiting member is provided with a first locking hole, and that the locking end of the first locking member is inserted into the first locking hole when the frame is in an extended state.An improvement of the present application is that the first limiting member is provided with an unlocking button, the pressed end of the unlocking button is provided toward the first locking hole, and the pressed end of the unlocking button is moved toward the first locking hole under an external force to operate the locking end of the first locking member to disengage from the first locking hole.As an improvement of the present application, the second supporting frame unit is provided with a second restricting member at the second end, and the second restricting member resists the first supporting frame unit when the frame is in an expanded state.As an improvement to the present application, the frame further comprises a fastener, wherein the first end of the fastener is connected to the rear support bracket assembly, wherein the second end of the fastener is releasably connected to the front support bracket assembly, wherein the second end of the fastener is connected to the front support bracket assembly when the frame is in the collapsed state, wherein the second end of the fastener is released from the front support bracket assembly when the frame is in the deployed state.An improvement of the present application is that the frame further comprises a slider assembly and a locking member, the slider assembly being rotatably connected to the rear support assembly, the locking member being connected to the slider assembly and the rear support assembly, and the locking member serving to enable or prevent relative rotation between the slider assembly and the rear support assembly.An improvement to the application is that the wheels include movable rollers and fixed rollers, the movable rollers being connected to the underside of the front bracket assembly and the fixed rollers being connected to the underside of the rear bracket assembly.As an improvement of the present application, the frame further comprises a second lock assembly, the second lock assembly moves between a locked position and an unlocked position, the jack rollers are provided with a number of second lock holes on the inner side along the edges of the pivot axis, the lock lever of the second lock assembly is inserted into the second lock holes when the second lock assembly is moved to a locked position, and when the second lock assembly is moved to an unlocked position, the lock lever of the second lock assembly is removed from the second lock hole.As an improvement of the present application, the second lock assembly further includes a drive pedal and a drive lever, wherein the drive pedal is connected to the drive lever, the drive lever is provided at its end with a chamfered drive surface, the drive pedal and the drive lever rotate about a rotation axis of the drive lever under the action of an external force, and the first end of the lock lever abuts against the chamfered drive surface and slides along the surface of the chamfered drive surface, so that the lock lever can insert or remove lock levers into the second lock hole.As an improvement of the present application, the second lock assembly further includes a return spring, one end of the return spring is connected to a connecting portion at the bottom of the frame and the other end of the return spring is connected to the lock lever, the resiliency of the return spring causes the lock lever to tend to move away from the second lock hole.An improvement of the present application is that the upper surface of the drive pedal is provided with a friction pattern.An improvement of the present application is that a foot holding space recessed downward is formed between the first pivot rod unit, the second pivot rod unit, a part of the first lower bracket unit, a part of the second lower bracket unit, a part of the first supporting frame unit, and a part of the second supporting frame unit.As an improvement of the present application, a hood is also included, wherein the upper end of the front bracket unit and the upper end of the rear bracket unit are provided with a first connector, the upper end of the hood is connected to the first connector, and the lower end of the hood is connected to the lower end of the front bracket unit and the lower end of the rear bracket unit or the lower bracket unit.An improvement of the present application is that the hood body is provided with a connecting band at the upper end, that the first connecting element is provided with a through hole, and that the free end of the connecting band runs along the through hole and is connected to the surface of the hood body.Also included as an improvement to the present application is a sunshade assembly, the sunshade assembly comprising a second connection member, a number of sunshade holders, and a sunshade body, the second connection member being detachably connected to the first connection member to allow the sunshade assembly to be attached or detached to the frame.An improvement of the present application is that one of the first connecting member and the second connecting member is provided with an insertion slot and the other connecting member is provided with an insertion slot, and that the insertion block is inserted into the insertion slot.An improvement of the present application is that the second link member is provided with a first rotatable portion and a second rotatable portion, the first rotatable portion is rotatably connected to the second rotatable portion, one sunshade holder is connected to the first rotatable portion and the other sunshade holder is connected to the second rotatable portion.An improvement of the present application is that the frame further comprises a pulling device, wherein the pulling device is rotatably connected to the front bracket device, and the pulling device is for allowing a user to pull.An improvement of the present application is that the pulling device comprises a pull rod, a connecting rod, and a connecting housing, the pull rod being slidably connected to the connecting housing, one end of the connecting rod being rotatably connected to a lower portion of the front bracket assembly, and the other end of the connecting rod being coupled to the connecting housing; the pull rod being provided with a plurality of third locking bits, the connecting housing being provided with a third locking member, and the third locking member being coupled to any of the third locking bits, the connecting housing being provided with a third locking member, the third locking member being connected to any of the third locking positions.The advantageous effect of the application is that: by adjusting the above structure, when in use, the front bracket assembly and the rear bracket assembly are pulled forward and backward in two directions, respectively, and the two are separated from each other until the first lower bracket unit and the second lower bracket unit are flush and in the same plane, and the first support frame unit and the second support frame unit are flush and in the same plane, and at this time, the frame is in the state of deployment, which is convenient for the user to set and lay. The support frame assembly may additionally provide a support force to prevent the first lower support unit and the second lower support unit from rotating relative to each other, and the product structure is stable; in storage, the central portion of the lower support assembly and the central portion of the support frame assembly are moved upward, the first lower support unit and the second lower support unit rotate relative to each other, the first lower support unit rotates relative to the front support assembly, the second lower support unit rotates relative to the front support assembly, and the first support frame assembly and the second support frame assembly rotate relative to each other. The first support frame unit and the second support frame unit rotate relative to each other, the first support frame unit rotates relative to the front tie rod unit, the second support frame unit rotates relative to the rear tie rod unit, and the front bracket assembly and the rear bracket assembly are close to each other, and the overall size of the product is small, which is convenient for storage and transport.ILLUSTRATION OF THE ACCOMPANYING DRAWINGSIn order to more clearly illustrate the technical solutions in the embodiments of the application, the accompanying drawings used in the description of the embodiments are briefly presented below, and the accompanying drawings in the following description are only some of the embodiments of the application, and other accompanying drawings can be obtained on the basis of these drawings without performing any curative work for those skilled in the art.The application will be described in more detail below in conjunction with the accompanying drawings and embodiments. FIG. 1 is a schematic diagram showing the structure of the application in a pushing state; FIG. 2 is a schematic illustration of the structure of the application in the pulled state; FIG. 3 is a schematic structural diagram of an angle of the frame in the deployed state of the application; FIG. 4 is a schematic structural diagram of another angle of the frame in the deployed state of the application; FIG. 5 is a side view of the unfolded state of the frame of the application; FIG. 6 is a schematic structural diagram of the half-folded state of the scope of the application; FIG. 7 is a schematic structural diagram of the scope of the application in the folded state; FIG. 8 is an enlarged view of the circle A of FIG. 1 ; FIG. 9 is an enlarged view of the circle B of FIG. 6 ; FIG. 10 is a sectional view of the second locking assembly of the application in the unlocked position; FIG. 11 is a cross-sectional view of the second latch assembly of the application in the locked position; FIG. 12 is a schematic illustration of a partially resolved structure of the second locking assembly of the application at an angle; FIG. 13 is a schematic diagram of a partially exploded structure of the second latch assembly of the application at a different angle.SPECIFIC EMBODIMENTReferring to Figs. 1 to 13, a folding cart comprising a frame 100 and wheels 200 mounted on the underside of the frame 100, characterized in that the frame 100 has a folded state and an unfolded state, the frame 100 comprising:A front bracket assembly 110, the front bracket assembly 110 having a front tie rod unit 111 at the lower end;A rear bracket assembly 120, wherein the rear bracket assembly 120 is disposed front to rear opposite to the front bracket assembly 110, and the rear bracket assembly 120 is provided at the lower end with a rear tie rod unit 121;A lower bracket assembly 130, the lower bracket assembly 130 comprising a first lower bracket unit 131 and a second lower bracket unit 132, the first lower bracket unit 131 having a first end rotatably coupled to the lower end of the front bracket assembly 110, the first end of the second lower bracket unit 132 having a first end rotatably coupled to the lower end of the rear bracket assembly 120, the second end of the first lower bracket unit 131 rotatably coupled to the second lower bracket unit 132 rotatably coupled to the second end of the second lower bracket unit 132;A support frame assembly 140, the support frame assembly 140 comprising a first support frame unit 141, a second support frame unit 142, a first pivot rod unit 143, and a second pivot rod unit 144, the first support frame unit 141 being rotatably coupled at a first end to the lower end of the front connecting rod unit 111, the first end of the second support frame unit 142 being rotatably coupled at a second end of the rear connecting rod unit 121 at a lower end, the first support frame unit 141 being rotatably coupled at a second end to the second support frame unit 142 at a second end, the first pivot rod unit 143 being rotatably coupled at both ends to the first second support frame unit 142 rotatably coupled to a second end of the rear connecting rod unit 121 at a lower end, the first support frame unit 141 being rotatably coupled at a second end to the second support frame unit 142 at a second end, wherein the first pivot rod unit 143 is rotatably connected at both ends to the first lower bracket unit 131 and the first support frame unit 141, respectively, and wherein the second pivot rod unit 144 is rotatably connected at both ends to the second lower bracket unit 132 and the second support frame unit 142, respectively.By setting the above structure, in use, the front bracket assembly 110 and the rear bracket assembly 120 are pulled in two forward and rearward directions, respectively, and the two are separated from each other until the first lower bracket unit 131 and the second lower bracket unit 132 are flush and in the same plane, and the first support frame unit 141 and the second support frame unit 142 are flush and in the same plane, at which time the frame 100 is in the deployed state. At this time, the frame 100 is in a deployed state that is comfortable for the user to sit or lie, and the support frame assembly 140 may provide additional support force to prevent relative rotation of the first lower bracket unit 131 and the second lower bracket unit 132, such that the product structure is stable; When stored, the central part of the lower bracket assembly 130 and the central part of the support frame assembly 140 are moved upward, and the first lower bracket unit 131 and the second lower bracket unit 132 rotate relative to each other, the first lower bracket unit 131, the first lower bracket unit 131 relative to the front bracket assembly 110, the second lower bracket unit 132 relative to the front bracket assembly 110, the first support frame unit 141 and the second support frame unit 142 relative to each other, the first support frame unit 141 relative to the front tie rod unit 111, the second support frame unit 142 relative to the rear tie rod unit 121, the front bracket assembly 110 and the rear bracket assembly 120 are close to each other, and the total volume of the product is small, which is convenient for storage and transport.In this embodiment, the first lower bracket unit 131 includes a first restricting member 133 provided at a second end, the second lower bracket unit 132 is rotatably connected to the first restricting member 133 at a second end, and when the frame 100 is in the unfolded state, the first restricting member 133 abuts against the second lower bracket unit 132. By the structure of the above-described structure, the first lower bracket unit 133 is rotatable relative to the rear link unit 121 when the frame 100 is in the unfolded state, and the overall size of the product is favorable for storage and transport. When the frame 100 is in the deployed state, the first lower bracket unit 131 and the second lower bracket unit 132 are flush and in the same plane, and at this time, the first restricting member 133 is connected to the second lower bracket unit 132, which can prevent the relative rotation of the first lower bracket unit 131 and the second lower bracket unit 132 to further rotate downward, and restrict the relative positions of the two to stably fix the product in the deployed state, which is convenient for the users, and the product structure is stable, and the use of the product is stable. The product is stable and fixed in the deployed state, which is convenient for the user to use, and the product structure is stable and secure in use.In this embodiment, a first locking member 134 is provided in the second end of the second lower bracket unit 132, the locking end of the first locking member 134 is screwed through the side wall of the second end of the second lower bracket unit 132, and a first locking hole 135 is provided in the first restricting member 133. When the frame 100 is in the deployed state, the locking end of the first locking member 134 is inserted into the first locking hole 135. By setting the above structure, when the frame 100 is in the unfolded state, the first lower bracket unit 131 and the second lower bracket unit 132 are flush and in the same plane, and the locking end of the first locking member 134 is inserted into the first locking hole 135, whereby the first lower bracket unit 131 and the second lower bracket unit 132 can be locked, thereby hindering the relative rotation of the first lower bracket unit 131 and the second lower bracket unit 132 and improving the relative rotation of the first lower bracket unit 131 and the second lower bracket unit 132. The first lower support unit 131 and the second lower support unit 132 are capable of preventing the relative rotation of the first lower support unit 131 and the second lower support unit 132 and enhancing the stability and safety of the product.In this embodiment, the first restriction member 133 is provided with an unlocking button 136, and the pressed end of the unlocking button 136 is provided toward the first locking hole 135, and under the drive of an external force, the pressed end of the unlocking button 136 is moved toward the first locking hole 135 to cause the locking end of the first locking member 134 to disengage from the first locking hole 135. When the product is folded, pressing the pressed end of the unlocking button 136 causes the pressed end of the unlocking button 136 to resist the locking end of the first locking member 134, presses the locking end of the first locking member 134 away from the first locking hole 135, unlocks the locking state, and simultaneously moves the middle part of the lower bracket assembly 130 upward to realize the folding of the product, which is easy to operate.In this embodiment, the second supporting frame unit 142 is provided with a second restricting member 145 at the second end, and when the frame 100 is in an unfolded state, the second restricting member 145 is fixed to the first supporting frame unit 141. By setting the above structure, when the frame 100 is in an unfolded state, the first supporting frame unit 141 and the second supporting frame unit 142 are flush and in the same plane, and at this time, the second restricting member 145 is fixed to the first supporting frame unit 141, which can prevent the first supporting frame unit 141 and the second supporting frame unit 142 from rotating further downward, restricting the relative position of the two, and stably fixing the product in the unfolded state, which is convenient for the user to use, and the product is structurally stable and is safe to use.In this embodiment, the frame 100 includes a fastener 150, wherein the first end of the fastener 150 is connected to the rear bracket assembly 120, the second end of the fastener 150 is releasably connected to the front bracket assembly 110 when the frame 100 is in a folded state, the second end of the fastener 150 is secured to the front bracket assembly 110, and when the frame 100 is in the unfolded state, the second end of the fastener 150 is detached from the front bracket assembly 110. By setting the above structure, the distance between the front bracket assembly 110 and the rear bracket assembly 120 becomes smaller when the frame 100 is brought into the folded state, and the second end of the fastening member 150 is connected to the front bracket assembly 110, which can prevent the movement of the front bracket assembly 110 and the rear bracket assembly 120 away from each other, thus hindering the conversion of the frame 100 into the unfolded state and improving the stability of the product when stored and transported. The second end of the fastener 150 is released from the front bracket assembly 110, whereby the frame 100 can be brought into the unfolded state.In this embodiment, the frame 100 further includes a slider assembly 161 and a locking member 162, wherein the slider assembly 161 is rotatably connected to the rear bracket assembly 120, the locking member 162 is connected to the slider assembly 161 and the rear bracket assembly 120, and the locking member 162 serves to enable or prevent relative rotation of the slider assembly 161 and the rear bracket assembly 120. Rotation. By adjusting the above structure, the user can rotate the push rod assembly 161 in use such that the gripping end of the push rod assembly 161 is removed from the rear bracket assembly 120 and move the locking member 162 to fix the push rod assembly 161 so that it is convenient for the user to grip the gripping end of the push rod assembly 161, which is convenient for the user to push or pull the product, and the user can rotate the push rod assembly 161 as needed to adjust the angle between the push rod assembly 161 and the rear bracket assembly 120. The user can rotate the push rod assembly 161 as needed and adjust the relationship between the push rod assembly 161 and the rear bracket assembly 120, thereby adjusting the height of the gripping end of the push rod assembly 161, improving the comfort of the product, and providing an appropriate gripping height for various users, thereby making use more convenient; and when the push rod assembly 161 is rotated to the point at which the push rod assembly 161 is attached to the rear bracket assembly 120, the push rod assembly 161 can be efficiently stowed to reduce the length of the product, thereby making transport and stowage of the product more convenient.In this embodiment, the wheels 200 include movable rollers 210 and fixed rollers 220, the movable rollers 210 being connected to the bottom of the front bracket assembly 110 and the fixed rollers 220 being connected to the bottom of the rear bracket assembly 120. By setting the above structure, the movable rollers 210 and the fixed rollers 220 cooperate with each other when in use, which can make it easier for the user to slide the frame 100, so that the product can be moved more easily; moreover, the movable rollers 210 can rotate about a vertical axis, which makes it possible for the movable rollers 210 to change the direction of orientation, and thus makes it easier for the user to change the direction of movement of the carriage, which makes it easier for the operation.In this embodiment, the frame 100 also includes a second locking component 170. The second locking component 170 moves between a locked position and an unlocked position. A plurality of second lock holes 221 are provided along the edge of the rotary shaft at the inside of the jack roller 220. When the second locking member 170 moves to the locked position, the locking rod 171 of the second locking member 170 is inserted into the second locking hole 221. When the second locking component 170 moves to the unlocked position, the locking rod 171 of the second locking component 170 is released from the second locking hole 221. When the second locking member 170 moves to the locked position, the locking rod 171 is inserted into the second locking hole 221 by the above-described arrangement. The lock rod 171 prevents the rotation of the fixed roller 220, thereby preventing the carriage from moving, allowing the carriage to stably remain in place and making use safer. When the second lock member 170 moves to the unlocked position, the lock rod 171 is released from the lock groove 221. At this time, the fixed roller 220 can freely rotate, which makes it easier for the user to push, pull, and move the carriage, and makes moving the product convenient and labor-saving.In this embodiment, the second locking component 170 also includes a drive pedal 172 and a drive rod 173. The drive pedal 172 is connected to the drive rod 173. The end of the drive rod 173 is provided with a slant drive surface 174. The drive pedal 172 and the drive rod 173 rotate about the rotation axis of the drive rod 173 under an external force. The first end of the lock rod 171 abuts the driving slope 174 and slides along the surface of the driving slope 174, so that the lock rod 171 can be extended and retracted and inserted into or detached from the second lock hole 221. By the arrangement of the above structure, during use, when the drive pedal 172 is stepped on, the drive pedal 172 drives the drive rod 173 and the inclined drive surface 174 to rotate. The inclined driving surface 174 drives the lock rod 171 to move axially and then to be inserted into the second lock hole 221, thereby preventing the rotation of the fixed roller 220, allowing the carriage to stably remain in place and making the use safer.In this embodiment, the second locking component 170 also includes a return spring 175. One end of the return spring 175 is connected to the connection part on the lower side of the frame 100, and the other end of the return spring 175 is connected to the lock rod 171. The elastic force of the return spring 175 causes the lock rod 171 to be apt to move away from the second lock hole 221. By the arrangement of the above structure, when the second locking component 170 moves to the unlocked position during use, the locking rod 171 is released from the second locking hole 221 under the elastic force of the return spring 175 to allow the fixed roller 220 to freely rotate, which facilitates the user moving the carriage and makes the product easy to use.In this embodiment, the upper surface of the drive pedal 172 is provided with friction grooves 176. By the arrangement of the above structure, the friction ribs 176 can increase the friction coefficient of the upper surface of the accelerator pedal 172. When the user steps on the drive pedal 172, the friction between the user's foot and the upper surface of the drive pedal 172 is increased, thereby making it easier for the user to step down on the drive pedal 172, and the operation is easy.In this embodiment, a foot receiving space recessed downward is formed between the first pivot rod unit 143, the second pivot rod unit 144, a part of the first lower bracket unit 131, a part of the second lower bracket unit 132, a part of the first support frame unit 141, and a part of the second support frame unit 142. By the arrangement of the above structure, an infant can be seated in the cart during use, and the feet can be placed in the downwardly recessed foot receiving space, thereby more conveniently seating the infant in the product and improving the user's experience.In this embodiment, a cover body 300 is also included. The upper ends of the front bracket assembly 110 and the rear bracket assembly 120 are both provided with first connecting parts 101. The upper end of the cover body 300 is connected to the first connection parts 101, and the lower end of the cover body 300 is connected to the lower end of the front bracket assembly 110 and the lower end of the rear bracket assembly 120 or the lower bracket assembly 130. By the arrangement of the above structure, the cover body 300 can be stably connected to the frame 100 during use by connecting the upper end of the cover body 300 to the first connection parts 101 and connecting the lower end of the cover body 300 to the lower end of the front bracket assembly 110 and the lower end of the rear bracket assembly 120 or the lower bracket assembly 130. The inner wall of the cover body 300 forms a storage space in which the user can sit or lie comfortably, and improves the comfort and safety of the product.In this embodiment, the upper end of the cover body 300 is provided with a connecting band 310, and the first connector 101 is provided with a through hole 102. The free end of the connecting tape 310 passes through the through hole 102 and is connected to the surface of the cover body 300. By the arrangement of the above structure, during use, the connection between the cover body 300 and the first connector 101 can be made by passing the free end of the connecting band 310 through the through hole 102 and connecting it to the surface of the cover body 300. The product structure is stable and the connection is convenient. Preferably, the free end of the connecting band 310 is connected to the surface of the cover body 300 by velcro or buttons, which is comfortable and stable.Also included in this embodiment is a sun shield cover assembly 400. The sunshade cover assembly 400 includes a second connector 410, a plurality of sunshade holders 420, and a sunshade cover body 430. The second connector 410 is releasably connected to the first connector 101 such that the sunshade cover assembly 400 can be connected to or disconnected from the frame 100. By the arrangement of the above structure, the sunshade cover assembly 400 can be installed or removed during use by connecting or disconnecting the second connector 410 to the first connector 101, which is convenient for the user to select whether to use the sunshade cover assembly 400, thereby being more convenient for the user to use. Moreover, the sunshade holders 420 can stably hold the sunshade cover body 430 to shield the sunlight for the user, which provides better user experience.In this embodiment, one of the first connectors 101 and the second connector 410 is provided with an insertion slot 103, and the other of the first connectors 101 and the second connector 410 is provided with an insertion slot, and the insertion block 103 is inserted into the insertion slot. By the arrangement of the above structure, it is convenient for the user during use to connect the first connector 101 and the second connector 410 by inserting the insertion block 103 into the insertion slot, and installation is convenient.In this embodiment, the second link 410 is provided with a first rotating part 411 and a second rotating part 412. The first rotating part 411 is rotatably connected to the second rotating part 412. One sunshade bracket 420 is connected to the first rotating part 411, and the other sunshade bracket 420 is connected to the second rotating part 412. By the arrangement of the above structure, the sunshade holders 420 can be approached to or separated from each other during use by rotating the second rotating part 412 to expand or fold the sunshade cover body 430, whereby the user can easily adjust the sunshade area of the sunshade cover body 430, which provides better user experience.In this embodiment, the frame 100 further includes a traction assembly 180, the traction assembly 180 rotatably connected to the front bracket device 110, and the traction assembly 180 serving to allow a user to pull the product. By adjusting the above structure, the user may pull on the traction assembly 180 in use and thus move the product, and the user may choose to push or pull the product, which provides the user with more options for use.In this embodiment, the traction assembly 180 includes a drawbar 181, a connecting rod 182, and a connecting housing 183, the drawbar 181 being slidably connected to the connecting housing 183, one end of the connecting rod 182 being rotatably connected to the lower portion of the front bracket assembly 110, and the other end of the connecting rod 182 being connected to the connecting housing 183; the drawbar 181 being provided with a number of third locking positions, the connecting housing being provided with a third locking element, the third locking element being connected to any of the third locking positions. By setting the above structure, in use of the traction assembly 180, by connecting the third locking member to one of the third locking positions, the length of the pull rod 181 can be adjusted, which is convenient for the user to grasp and pull the product; and in storage of the traction assembly 180, the third locking member can be connected to the uppermost third locking position to shorten the length of the pull rod 181, which is convenient for storage of the product.As described above, one or more embodiments are provided in connection with the specific content, and it is not intended that the specific implementation of the present application be limited only to these descriptions.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedCN 2024219348557

[0001]

Claims

A foldable cart comprising a frame (100) and wheels (200) mounted on the bottom of the frame (100), characterized in that the frame (100) has a folded state and an unfolded state, the frame (100) comprising: a front support assembly (110), the front support assembly (110) having a front tie rod unit (111) at the lower end; a rear support assembly (120), the rear support assembly (120) being disposed opposite the front support assembly (110) from front to rear, and the rear support assembly (120) being provided with a rear tie rod unit (121) at the lower end; A lower bracket assembly (130), the lower bracket assembly (130) comprising a first lower bracket unit (131) and a second lower bracket unit (132), the first lower bracket unit (131) being pivotally connected at a first end to a lower end of the front bracket assembly (110), the second lower bracket unit (132) being pivotally connected at a first end to a lower end of the rear bracket assembly (120), the second end of the first lower bracket unit (131) being pivotally connected to the second end of the second lower bracket unit (132); support bracket assembly (140), the support bracket assembly (140) comprising a first support bracket unit (141), a second support bracket unit (142), a first pivot rod unit (143), and a second pivot rod unit (144), wherein the first support beam unit (141) is pivotally connected at its first end to the lower end of the front connecting rod unit (111), the second support beam unit (142) is pivotally connected at its first end to the lower end of the rear connecting rod unit (121), the first support frame unit (141) is pivotally connected at its second end to the second end of the second support frame unit (142), the first rotating rod unit (143) is pivotally connected at its two ends to the first lower support unit (131) and to the first support frame unit (141), respectively, and the second rotating rod unit (144) is pivotally connected to the second lower support unit (132) and to the second support frame unit (142) at both ends.The folding cart according to claim 1, characterized in that the first lower support unit (131) comprises a first restricting member (133) provided at a second end, the second end of the second lower support unit (132) is rotatably connected to the first restricting member (133), and the first restricting member (133) is pressed against the first lower support unit (132) when the frame (100) is in the deployed state. the second lower support unit (132).The folding cart according to claim 2, characterized in that a first locking member (134) is provided in the second end of the second lower support unit (132), the locking end of the first locking member (134) protrudes from the side wall of the second end of the second lower support unit (132), and the first limiting member (133) is provided with a first locking hole (135), when the frame (100) is in the deployed state, the locking end of the first locking member (134) is inserted into the first locking hole (135).The folding cart according to claim 3, characterized in that the first restricting member (133) is provided with an unlocking button (136), the pushed end of the unlocking button (136) is provided toward the first locking hole (135), and under the operation of an external force, the pushed end of the unlocking button (136) is moved toward the first locking hole (135) to operate the locking end of the first locking member (134) to release it from the first locking hole (135).The folding cart according to claim 1, characterized in that the second supporting frame unit (142) is provided with a second limiting member (145) at the second end, the second limiting member (145) being pressed against the first supporting frame unit (141) when the frame (100) is in the unfolded state.The folding cart of claim 1, characterized in that the frame (100) further comprises a fastener (150), the fastener (150) being connected at a first end to the rear support assembly (120), the fastener (150) being detachably connected at a second end to the front support assembly (110) when the frame (100) is in the folded state, the second end of the fastener (150) being connected to the front bracket assembly (110) when the frame (100) is in the folded state, the second end of the retaining member (150) being detached from the front bracket assembly (110).The folding cart of claim 1, characterized in that the frame (100) further comprises a push rod assembly (161) and a locking member (162), the push rod assembly (161) being rotatably coupled to the rear support assembly (120), the locking member (162) being coupled to the push rod assembly (161) and the rear support assembly (120), the locking member (162) allowing or preventing relative rotation between the push rod assembly (161) and the rear support assembly (120).The folding cart of claim 1, characterized in that the wheels (200) comprise movable rollers (210) and fixed rollers (220), the movable rollers (210) being attached to the bottom of the front support assembly (110) and the fixed rollers (220) being attached to the bottom of the rear support assembly (120); the frame (100) further comprising a second locking assembly (170), the second locking assembly (170) being attached to the bottom of the rear support assembly (120). The frame (100) further comprises a second locking assembly (170), wherein the second locking assembly (170) is movable between a locked position and an unlocked position, wherein the fixed rollers (220) are provided with a number of second locking holes (221) on the inner side along the edges of the pivot axis, and when the second locking assembly (170) is movable to a locked position, the locking lever (171) of the second locking assembly (170) is inserted into the second locking holes (221). When the second lock assembly ( 170) is moved to the unlocked position, the lock lever ( 171) of the second lock assembly ( 170) is released in the second lock hole ( 221).The folding cart according to claim 8, characterized in that the second locking assembly (170) further comprises a drive pedal (172) and a drive lever (173), the drive pedal (172) being connected to the drive lever (173), and the drive lever (173) being provided with a drive ramp (174) at the end of the drive lever (173), the drive pedal (172) and the drive lever (173) rotating about a rotation axis of the drive lever (173) under the action of an external force, the first end of the locking lever (171) abutting against the drive sloped surface (174) and sliding along the surface of the drive sloped surface (174) to allow the locking lever (171) to be inserted or released into the second locking hole (221).The foldable cart according to claim 9, characterized in that the second lock assembly (170) further comprises a return spring (175), one end of the return spring (175) is connected to a connecting portion at the bottom of the frame (100), and the other end of the return spring (175) is connected to the lock lever (171), wherein the resiliency of the return spring (175) causes the lock lever (171) to have a tendency to move away from the second lock hole (221).

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