A frame structure and a folding stroller

Abstract

The utility model relates to the technical field of cart, disclose a car frame structure and folding cart, car frame structure, include: chassis mechanism and support mechanism, chassis mechanism includes adapter, a plurality of adapter stem and a plurality of first mounting seat, and support mechanism includes a plurality of support rod and a plurality of first connecting assembly, the stability of bottom structure is guaranteed to the adapter and a plurality of adapter stem of the application, the stability of circumferential structure is guaranteed to a plurality of support rod and first connecting assembly, and the adapter of the application is rotatably connected between adapter stem, first connecting rod, second connecting rod and support rod are rotatably connected, and first connecting rod and second connecting rod are detachable connection through the sleeve, set up like this, make above -mentioned structure can be more fully folded, reduced the occupation of space when folding state, and when folding adapter and adapter stem, can adopt the way of pulling adapter to complete folding operation, make when folding and unfolding operation, more convenient.

Description

Technical Field

[0001] This utility model relates to the field of trolley technology, and in particular to a frame structure and a folding trolley. Background Technology

[0002] Currently, existing folding strollers typically only have a partial folding structure to ensure the stability of the stroller's structure. As a result, the stroller still occupies a lot of space after being folded, and is cumbersome to use, making it inconvenient to fold and unfold. Utility Model Content

[0003] The purpose of this utility model is to provide a frame structure and a folding trolley that can reduce the space occupied in the folded state while ensuring structural stability, and is also convenient to use and easy to operate.

[0004] To achieve the above objectives, this utility model provides a vehicle frame structure having a first direction and a second direction perpendicular to each other, including: a chassis mechanism and a support mechanism; the chassis mechanism includes a connector, multiple connector rods, and multiple first mounting seats, the multiple first mounting seats being respectively disposed on both sides of the connector in the first direction, any one of the first mounting seats being connected to the connector via the connector rod, one end of the connector rod being rotatably connected to the first mounting seat, and the other end being rotatably connected to the connector; the support mechanism includes multiple support rods and multiple first connecting components, the multiple support rods being one-to-one corresponding to each other. The support rod is mounted on a plurality of first mounting bases and extends along a second direction. In the first direction, two adjacent support rods located on the same side are connected by the connecting assembly. The first connecting assembly includes a first connecting rod, a second connecting rod, a sleeve, and a snap-fit ​​member. One end of the first connecting rod is rotatably connected to one of the support rods. The sleeve is located at the other end of the first connecting rod. One end of the second connecting rod is rotatably connected to the other support rod. The snap-fit ​​member is located at the other end of the second connecting rod. The second connecting rod is detachably connected to the sleeve through the snap-fit ​​member.

[0005] In a specific embodiment of this utility model, a snap-fit ​​groove is provided on the outer peripheral side of the sleeve. The snap-fit ​​component includes a fixing member, a telescopic spring, and a button. The fixing member is located inside the second connecting rod, and the outer peripheral sidewall of the fixing member has a first limiting groove. The second connecting rod has a second limiting groove at a position corresponding to the first limiting groove. One end of the telescopic spring is connected to the bottom of the first limiting groove, and the other end is connected to the button. The button is slidably connected to the first limiting groove and the second limiting groove through the telescopic spring. When the button is pressed, the button can slide into the snap-fit ​​groove to complete the connection between the second connecting rod and the first connecting rod.

[0006] In a specific embodiment of this utility model, the button is inclined toward the sleeve and extends obliquely away from the end facing the sleeve in a direction away from the second connecting rod. The inner circumferential side of the sleeve facing the second connecting rod has a sliding groove, which is adapted to the shape of the button.

[0007] In a specific embodiment of this utility model, the first connecting assembly further includes a locking member. The outer peripheral side of the first connecting rod has a fixing hole, and the outer peripheral side of the sleeve has a mounting hole that penetrates the sleeve. The inner peripheral side of the sleeve is provided with a sliding groove, one end of which communicates with the mounting hole, and the other end of which penetrates the end of the sleeve facing the second connecting rod. The locking member passes through the mounting hole and is disposed in the fixing hole, and the locking member is slidably connected to the sliding groove and the mounting hole, so that the sleeve can slide relative to the first connecting rod.

[0008] In a specific embodiment of this utility model, the outer periphery of the adapter is provided with a plurality of first mounting grooves, and the plurality of first mounting grooves correspond one-to-one with a plurality of first mounting seats. The bottom surface of the first mounting groove and the side facing the first mounting seat are open. The first mounting seat is provided with a second mounting groove, which corresponds to the first mounting groove. The top surface of the second mounting groove and the side facing the first mounting groove are open. One end of the adapter rod is rotatably connected to the first mounting groove, and the other end is rotatably connected to the second mounting groove.

[0009] In a specific embodiment of this utility model, the supporting mechanism further includes a second mounting seat and a third mounting seat. The second mounting seat is disposed on one of the support rods, and the third mounting seat is disposed on the other support rod. The second mounting seat has a third mounting groove on the side facing the third mounting seat, and the bottom surface of the third mounting groove and the side facing the third mounting seat are open. The third mounting seat has a fourth mounting groove, and the bottom surface of the fourth mounting groove and the side facing the second mounting seat are open. The first connecting rod is rotatably connected to the third mounting groove, and the second connecting rod is rotatably connected to the fourth mounting groove.

[0010] In a specific embodiment of this utility model, a third direction is further provided, wherein the first direction, the second direction, and the third direction are mutually perpendicular to each other, and a push-pull mechanism is also included. The push-pull mechanism is disposed on one side of the chassis mechanism in the third direction and includes a first upright, a second upright, a first crossbar, a second crossbar, a second connecting assembly, and a third crossbar. The first upright and the second upright extend along the second direction and are respectively mounted on two first mounting seats. The first crossbar and the second crossbar are both L-shaped, and one end of the first crossbar is rotatably connected to the first upright and the other end is connected to one end of the second crossbar. One end of the third crossbar is rotatably connected to the second upright, and the other end of the third crossbar is detachably connected to the other end of the second crossbar through the second connecting assembly. The first crossbar, the second crossbar, the second connecting assembly, and the third crossbar form a C-shaped structure.

[0011] In a specific embodiment of this utility model, both the first upright and the second upright are rotatably connected to the first mounting base.

[0012] To achieve the same purpose, this utility model also provides a folding trolley, including a side panel, a bottom panel, and a frame structure as described above. The side panel is wrapped around a plurality of the support rods, and the bottom panel is laid on the top surface of the adapter and the plurality of adapter rods. The bottom panel and the side panel together enclose a placement space.

[0013] In a specific embodiment of this utility model, a canopy structure is also included. The canopy structure includes a first bow-shaped rod, a second bow-shaped rod, a connecting rod, and a top cloth. The first bow-shaped rod and the second bow-shaped rod are symmetrically connected to the top of the support mechanism along the first direction and are detachably connected. The two ends of the connecting rod are respectively connected to the first bow-shaped rod and the second bow-shaped rod. The top cloth covers the top surface of the first bow-shaped rod, the second bow-shaped rod, and the connecting rod.

[0014] Compared with the prior art, the frame structure and folding trolley of this utility model embodiment have the following advantages:

[0015] This utility model ensures structural stability by setting up a chassis mechanism and a support mechanism. Specifically, the stability of the bottom structure is ensured by a connector and multiple connector rods, and the stability of the circumferential structure is ensured by multiple support rods and a first connecting assembly. Furthermore, the connector and connector rods are rotatably connected, and the first connecting rod, the second connecting rod, and the support rods are all rotatably connected. The first connecting rod and the second connecting rod are detachably connected by a sleeve. This design allows the above structures to be folded more fully, reducing the space occupied when folded. Moreover, the folding operation can be completed by lifting the connector, making folding and unfolding operations more convenient. Attached Figure Description

[0016] Figure 1 This is a perspective view of a folding trolley according to an embodiment of the present utility model;

[0017] Figure 2 This is a perspective view of the vehicle frame structure and roof structure in the unfolded state according to an embodiment of the present utility model;

[0018] Figure 3 This is an exploded view of the first connecting component according to an embodiment of the present utility model;

[0019] Figure 4 This is an assembly drawing of the second connecting rod and the snap-fit ​​component according to an embodiment of the present utility model;

[0020] Figure 5 This is a perspective view of the sleeve according to an embodiment of the present utility model;

[0021] Figure 6 This is an assembly drawing of the first connecting rod, sleeve, and locking component according to an embodiment of the present utility model;

[0022] Figure 7 This is a perspective view of the adapter according to an embodiment of the present utility model;

[0023] Figure 8 This is a perspective view of the first mounting base according to an embodiment of the present utility model;

[0024] Figure 9 This is a perspective view of the second mounting base according to an embodiment of the present utility model;

[0025] Figure 10 This is a perspective view of the third mounting base according to an embodiment of the present utility model;

[0026] Figure 11 This is an exploded view of the push-pull mechanism according to an embodiment of the present utility model;

[0027] Figure 12 This is a perspective view of the vehicle frame structure and roof structure of this utility model embodiment when they are in a folded state.

[0028] In the diagram, 1 is the frame structure; 11 is the chassis mechanism; 111 is the adapter; 1111 is the first mounting slot; 112 is the adapter rod; 113 is the first mounting base; 1131 is the second mounting slot; 12 is the support mechanism; 121 is the support rod; 122 is the first connecting assembly; 1221 is the first connecting rod; 12211 is the fixing hole; 1222 is the second connecting rod; 1223 is the sleeve; 12231 is the snap-fit ​​groove; 12232 is the sliding groove; 12233 is the mounting hole; 12234 is the sliding groove; 1224 is the snap-fit ​​component; 12241 is the fixing component; 12242 is the telescopic spring; 12243 is the button; 122 44. Limiting part; 1225. Locking part; 12251. Elastic sheet; 12252. Protrusion; 123. Second mounting seat; 1231. Third mounting groove; 124. Third mounting seat; 1241. Fourth mounting groove; 13. Push-pull mechanism; 131. First upright; 132. Second upright; 133. First crossbar; 134. Second crossbar; 135. Second connecting assembly; 136. Third crossbar; 2. Enclosing fabric; 3. Canopy structure; 31. First bow-shaped rod; 32. Second bow-shaped rod; 33. Connecting rod; 34. Top fabric; 4. Handle; 5. Wheel; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0029] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] like Figures 1-6 As shown, a vehicle frame structure 1 according to an embodiment of the present invention has a first direction X and a second direction Y that are perpendicular to each other, including: a chassis mechanism 11 and a support mechanism 12; the chassis mechanism 11 includes a connector 111, a plurality of connector rods 112 and a plurality of first mounting seats 113, the plurality of first mounting seats 113 are respectively disposed on both sides of the connector 111 in the first direction X, any one of the first mounting seats 113 is connected to the connector 111 through a connector rod 112, one end of the connector rod 112 is rotatably connected to the first mounting seat 113, and the other end is rotatably connected to the connector 111; the support mechanism 12 includes a plurality of support rods 121 and a plurality of first connecting components 122, the plurality of support rods 121 are respectively disposed one-to-one with the plurality of first mounting seats 113. On a mounting base 113, a support rod 121 extends along the second direction Y. In the first direction X, two support rods 121 located on the same side and arbitrarily adjacent to each other are connected by a connecting assembly. The first connecting assembly 122 includes a first connecting rod 1221, a second connecting rod 1222, a sleeve 1223, and a snap-fit ​​member 1224. One end of the first connecting rod 1221 is rotatably connected to one of the support rods 121. The sleeve 1223 is located at the other end of the first connecting rod 1221. One end of the second connecting rod 1222 is rotatably connected to the other support rod 121. The other end of the second connecting rod 1222 is provided with a snap-fit ​​member 1224. The second connecting rod 1222 is detachably connected to the sleeve 1223 through the snap-fit ​​member 1224.

[0034] The frame structure 1 of this embodiment ensures structural stability by setting a chassis mechanism 11 and a support mechanism 12. Specifically, the stability of the bottom structure is ensured by a connector 111 and multiple connector rods 112, and the stability of the circumferential structure is ensured by multiple support rods 121 and a first connecting assembly 122. The connector 111 and the connector rods 112 are rotatably connected, and the first connecting rod 1221, the second connecting rod 1222 and the support rod 121 are also rotatably connected. The first connecting rod 1221 and the second connecting rod 1222 are detachably connected by a sleeve 1223. This arrangement allows the above structures to be folded more fully, reducing the space occupied in the folded state. Furthermore, when folding the connector 111 and the connector rods 112, the folding operation can be completed by lifting the connector 111, making the folding and unfolding operations more convenient.

[0035] like Figures 3-5 As shown, to facilitate the connection between the second connecting rod 1222 and the sleeve 1223, a snap-fit ​​groove 12231 is provided on the outer peripheral side of the sleeve 1223. The snap-fit ​​component 1224 includes a fixing component 12241, a telescopic spring 12242, and a button 12243. The fixing component 12241 is located inside the second connecting rod 1222, and the outer peripheral sidewall of the fixing component 12241 has a first limiting groove. The second connecting rod 1222 has a second limiting groove at a position corresponding to the first limiting groove. One end of the telescopic spring 12242 is connected to the first limiting groove. The bottom of the groove is connected, and the other end is connected to the button 12243. The button 12243 is slidably connected to the first limiting groove and the second limiting groove through the telescopic spring 12242. When the button 12243 is pressed, the button 12243 can slide into the snap-fit ​​groove 12231 to complete the connection between the second connecting rod 1222 and the first connecting rod 1221. By setting the telescopic spring 12241 and the button 12242, not only can the disassembly and assembly operation be quickly realized, but also the stable connection between the second connecting rod 1222 and the sleeve 1223 can be guaranteed.

[0036] Furthermore, in order to prevent the button 12243 from falling out of the first limiting groove and the second limiting groove, limiting portions 12244 are provided on both sides of the button 12243. The shape of the first limiting groove is adapted to the shape of the button 12243 and the limiting portion 12244, and the shape of the second limiting groove is adapted to the button, thereby preventing the button 12243 from falling out.

[0037] like Figures 3-5 As shown, in order to facilitate the connection between the second connecting rod 1222 and the sleeve 1223, the button 12242 is inclined towards the sleeve 1223 and extends from the end facing the sleeve 1223 in an inclined direction away from the second connecting rod 1222. The inner circumferential side of the sleeve 1223 facing the second connecting rod 1222 has a sliding groove 12232. The sliding groove 12232 is adapted to the shape of the button 12242. With this setting, it is only necessary to press the button 12242 until it enters the sliding groove 12232. As the second connecting rod 1222 is continuously inserted, the button 12242 will remain pressed under the action of the sliding groove 12232 until it enters the locking groove 12231.

[0038] like Figures 3-6As shown, to facilitate the connection between the second connecting rod 1222 and the sleeve 1223, a locking member 1225 is also included. The outer peripheral side of the first connecting rod 1221 has a fixing hole 12211, and the outer peripheral side of the sleeve 1223 has a mounting hole 12233 that penetrates the sleeve 1223. The inner peripheral side of the sleeve 1223 has a sliding groove 12234, one end of which communicates with the mounting hole 12233, and the other end of which penetrates the end of the sleeve 1223 facing the second connecting rod 1222. The locking member 1225 passes through the mounting hole 12233 and is disposed in the fixing hole 12211. The locking member 1225 is slidably connected to the sliding groove 12234 and the mounting hole 12233, so that the sleeve 1223 can slide relative to the first connecting rod 1221.

[0039] Furthermore, the locking element 1225 can be a bolt, or it can include an elastic sheet 12251 and a protrusion 12252 on the elastic sheet 12251. The elastic sheet 12251 is located inside the first connecting rod 1221, and the protrusion 12252 passes through the fixing hole 12211. The protrusion 12252 is slidably connected to the slide groove 12234 and the mounting hole 12233. When the protrusion 12252 is pressed, the protrusion 12252 can slide from the mounting hole 12233 into the slide groove 12234, so that the sleeve 1223 can slide relative to the first connecting rod 1221. This arrangement not only facilitates the connection between the snap-fit ​​element 1224 and the sleeve 1223, but also allows the protrusion 12252 to cooperate with the button 12242 after entering the mounting hole 12233, further ensuring a stable connection between the second connecting rod 1222 and the sleeve 1223.

[0040] like Figure 7 , Figure 8 and Figure 12 As shown, in order to control the folding direction, the outer periphery of the adapter 111 is provided with a plurality of first mounting slots 1111, and the plurality of first mounting slots 1111 correspond one-to-one with a plurality of first mounting seats 113. The bottom surface of the first mounting slot 1111 and the side facing the first mounting seat 113 are open. The first mounting seat 113 is provided with a second mounting slot 1131, which corresponds to the first mounting slot 1111. The top surface of the second mounting slot 1131 and the side facing the first mounting slot 1111 are open. One end of the adapter rod 112 is rotatably connected to the first mounting slot 1111, and the other end is rotatably connected to the second mounting slot 1131. By setting the first mounting slot 1111 and the second mounting slot 1131, the folding direction is ensured, thereby further reducing the space occupied.

[0041] like Figure 9 , Figure 10 and Figure 12As shown, in order to control the folding direction, the support mechanism 12 also includes a second mounting base 123 and a third mounting base 124. The second mounting base 123 is mounted on one of the support rods 121, and the third mounting base 124 is mounted on the other support rod 121. The side of the second mounting base 123 facing the third mounting base 124 has a third mounting groove 1231, the bottom surface of which and the side facing the third mounting base 124 are open. The third mounting base 124 has a fourth mounting groove 1241, the bottom surface of which and the side facing the second mounting base 123 are open. The first connecting rod 1221 is rotatably connected to the third mounting groove 1231, and the second connecting rod 1222 is rotatably connected to the fourth mounting groove 1241. By setting the third mounting groove 1231 and the fourth mounting groove 1241, the folding direction is ensured, thereby further reducing the space occupied.

[0042] like Figure 2 , Figure 11 and Figure 12 As shown, for ease of use, it also has a third direction Z, and the first direction X, the second direction Y, and the third direction Z are mutually perpendicular. It also includes a push-pull mechanism 13, which is located on the side of the chassis mechanism 11 in the third direction Z. The push-pull mechanism 13 includes a first upright 131, a second upright 132, a first crossbar 133, a second crossbar 134, a second connecting assembly 135, and a third crossbar 136. The first upright 131 and the second upright 132 extend along the second direction Y and are respectively mounted on two first mounting seats 113. The first crossbar 133 and the second crossbar 134 are both L-shaped, and one end of the first crossbar 133 is rotatably connected to the first upright 131, and the other end is connected to one end of the second crossbar 134. One end of the third crossbar 136 is connected to the first upright 131. The first horizontal bar 133, the second horizontal bar 134, the second connecting component 135, and the third horizontal bar 136 are rotatably connected to the second vertical bar 132. The first horizontal bar 133, the second horizontal bar 134, the second connecting component 135, and the third horizontal bar 136 form a C-shaped structure. The first vertical bar 131, the second vertical bar 132, the first horizontal bar 133, the second horizontal bar 134, the second connecting component 135, and the third horizontal bar 136 are designed to help users complete push and pull operations. Furthermore, the design of the connection relationship and shape of the first vertical bar 131, the second vertical bar 132, the first horizontal bar 133, the second horizontal bar 134, the second connecting component 135, and the third horizontal bar 136 further reduces the space occupied when folding.

[0043] like Figure 2 As shown, the chassis mechanism 11 is provided with push-pull mechanisms 13 on both sides of the third direction Z. The two push-pull mechanisms 13 enable the frame structure 1 to have more diverse deformations and can be used in different environments.

[0044] like Figure 2 and Figure 11As shown, for ease of use, the first upright 131 and the second upright 132 are both rotatably connected to the first mounting base 113. With this arrangement, by rotating the first upright 131 and the second upright 132, the first crossbar 133, the second crossbar 134, the second connecting assembly 135 and the third crossbar 136 can be arranged to form a C-shaped structure that can contact the ground, thereby acting as a brake for the trolley. Alternatively, in conjunction with the supporting mechanism 12, the trolley body can be lengthened, allowing the trolley to hold more items.

[0045] like Figure 1 As shown, this utility model embodiment also provides a folding trolley, including a surrounding fabric 2, a bottom fabric (not shown in the figure), and a frame structure 1 as described above. The surrounding fabric 2 is wrapped around a plurality of support rods 121, and the bottom fabric is laid on the top surface of the adapter 111 and a plurality of adapter rods 112. The bottom fabric and the surrounding fabric 2 together enclose a placement space.

[0046] Specifically, in order to make better use of the placement space, a table or multiple seats can be hung on the first connecting component 122 of the supporting mechanism 12. The multiple seats can be arranged facing each other or front and back for children to use.

[0047] In some embodiments, in order to extend the usable space, the angle of the push-pull mechanism can be adjusted to be parallel to the ground to extend the body of the stroller, which can be used to transport longer objects or for children to lie down and rest.

[0048] like Figure 1 and Figure 2 As shown, in order to provide sun and rain protection, a canopy structure 3 is also included. The canopy structure 3 includes a first bow-shaped rod 31, a second bow-shaped rod 32, a connecting rod 33, and a top cloth 34. The first bow-shaped rod 31 and the second bow-shaped rod 32 are symmetrically connected to the top of the support mechanism 12 along the first direction X and are detachably connected. The two ends of the connecting rod 33 are respectively connected to the first bow-shaped rod 31 and the second bow-shaped rod 32. The top cloth 34 covers the top surface of the first bow-shaped rod 31, the second bow-shaped rod 32, and the connecting rod 33. When not in use, the canopy structure 3 can also be disassembled and placed in the storage space for preservation.

[0049] like Figure 1 As shown, it also includes a handle 4, which is rotatably connected to the chassis mechanism 11. The folding trolley is pulled by setting the handle 4.

[0050] like Figure 1 As shown, it also includes wheels 5, which are rotatably connected to the chassis mechanism 11.

[0051] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A vehicle frame structure having a first direction and a second direction that are perpendicular to each other, characterized in that, include: Chassis structure and supporting structure; The chassis mechanism includes a connector, multiple connector rods, and multiple first mounting seats. The multiple first mounting seats are respectively disposed on both sides of the connector in the first direction. Any one of the first mounting seats is connected to the connector through the connector rod. One end of the connector rod is rotatably connected to the first mounting seat, and the other end is rotatably connected to the connector. The supporting mechanism includes multiple support rods and multiple first connecting assemblies. The multiple support rods are respectively and correspondingly disposed on multiple first mounting seats. The support rods extend along the second direction. In the first direction, any two support rods located on the same side and adjacent to each other are connected by the connecting assembly. The first connecting assembly includes a first connecting rod, a second connecting rod, a sleeve, and a snap-fit ​​member. One end of the first connecting rod is rotatably connected to one of the support rods. The sleeve is disposed at the other end of the first connecting rod. One end of the second connecting rod is rotatably connected to the other support rod. The other end of the second connecting rod is provided with the snap-fit ​​member. The second connecting rod is detachably connected to the sleeve through the snap-fit ​​member.

2. The frame structure according to claim 1, characterized in that, The outer peripheral side of the sleeve is provided with a snap-fit ​​groove. The snap-fit ​​component includes a fixing member, a telescopic spring, and a button. The fixing member is located inside the second connecting rod, and the outer peripheral side wall of the fixing member has a first limiting groove. The second connecting rod has a second limiting groove at a position corresponding to the first limiting groove. One end of the telescopic spring is connected to the bottom of the first limiting groove, and the other end is connected to the button. The button is slidably connected to the first limiting groove and the second limiting groove through the telescopic spring. When the button is pressed, the button can slide into the snap-fit ​​groove to complete the connection between the second connecting rod and the first connecting rod.

3. The frame structure according to claim 2, characterized in that, The button is inclined toward the sleeve and extends obliquely away from the end facing the sleeve in a direction away from the second connecting rod. The inner circumferential side of the sleeve facing the second connecting rod has a sliding groove that is adapted to the shape of the button.

4. The frame structure according to claim 1, characterized in that, The first connecting assembly further includes a locking member. The outer peripheral side of the first connecting rod has a fixing hole, and the outer peripheral side of the sleeve has a mounting hole that penetrates the sleeve. The inner peripheral side of the sleeve is provided with a sliding groove, one end of which communicates with the mounting hole, and the other end of which penetrates the end of the sleeve facing the second connecting rod. The locking member passes through the mounting hole and is disposed in the fixing hole, and the locking member is slidably connected to the sliding groove and the mounting hole, so that the sleeve can slide relative to the first connecting rod.

5. The frame structure according to claim 1, characterized in that, The adapter has a plurality of first mounting slots on its outer periphery, and each of the plurality of first mounting slots corresponds to a plurality of first mounting seats. The bottom surface of the first mounting slot and the side facing the first mounting seat are open. The first mounting seat has a second mounting slot, which corresponds to the first mounting slot. The top surface of the second mounting slot and the side facing the first mounting slot are open. One end of the adapter rod is rotatably connected to the first mounting slot, and the other end is rotatably connected to the second mounting slot.

6. The frame structure according to claim 1, characterized in that, The supporting mechanism further includes a second mounting base and a third mounting base. The second mounting base is disposed on one of the support rods, and the third mounting base is disposed on the other support rod. The second mounting base has a third mounting groove on the side facing the third mounting base, and the bottom surface of the third mounting groove and the side facing the third mounting base are open. The third mounting base has a fourth mounting groove, and the bottom surface of the fourth mounting groove and the side facing the second mounting base are open. The first connecting rod is rotatably connected to the third mounting groove, and the second connecting rod is rotatably connected to the fourth mounting groove.

7. The frame structure according to claim 1, further comprising a third direction, wherein the first direction, the second direction, and the third direction are mutually perpendicular, characterized in that, It also includes a push-pull mechanism, which is located on one side of the chassis mechanism in the third direction. The push-pull mechanism includes a first upright, a second upright, a first crossbar, a second crossbar, a second connecting assembly, and a third crossbar. The first upright and the second upright extend along the second direction and are respectively mounted on two first mounting seats. The first crossbar and the second crossbar are both L-shaped. One end of the first crossbar is rotatably connected to the first upright, and the other end is connected to one end of the second crossbar. One end of the third crossbar is rotatably connected to the second upright, and the other end of the third crossbar is detachably connected to the other end of the second crossbar through the second connecting assembly. The first crossbar, the second crossbar, the second connecting assembly, and the third crossbar form a C-shaped structure.

8. The frame structure according to claim 7, characterized in that, Both the first upright and the second upright are rotatably connected to the first mounting base.

9. A folding trolley, characterized in that, The device includes a drape, a base fabric, and a frame structure as described in any one of claims 1-8, wherein the drape is wrapped around a plurality of the support rods, the base fabric is laid on the top surface of the adapter and the plurality of the adapter rods, and the base fabric and the drape together enclose a placement space.

10. The folding trolley according to claim 9, characterized in that, It also includes a canopy structure, which includes a first bow-shaped rod, a second bow-shaped rod, a connecting rod, and a top cloth. The first bow-shaped rod and the second bow-shaped rod are symmetrically connected to the top of the support mechanism along the first direction and are detachably connected. The two ends of the connecting rod are respectively connected to the first bow-shaped rod and the second bow-shaped rod. The top cloth covers the top surface of the first bow-shaped rod, the second bow-shaped rod, and the connecting rod.

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