Side frame and cart

Abstract

The side frame comprises a first supporting rod and a second supporting rod, the first supporting rod is provided with a limiting piece, the second supporting rod is rotationally connected with the first supporting rod, and the second supporting rod has a folded state rotating from a high position to a low position and an unfolded state rotating from the low position to the high position. The second supporting rod is provided with a first limiting part and a second limiting part which are arranged at an interval in the rotating direction of the second supporting rod, and the limiting piece can move in the length direction of the first supporting rod, so that when the second supporting rod is in a folded state or an unfolded state, the limiting piece can be connected with the first limiting part or the second limiting part to limit the second supporting rod. The folded or unfolded second supporting rod is limited through the cooperation of the limiting piece, the first limiting part and the second limiting part, the folding and unfolding stability of the second supporting rod can be guaranteed, the overall structure is simple, operation is convenient, use of other accessories can be reduced, the production cost is reduced, assembly is convenient, and the production efficiency can be improved.

Description

Technical Field

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

[0002] Foldable trolleys, such as those for mobility aids, are designed to provide assistance with walking and wheelchair functionality for people with mobility impairments. They help users stand, walk, and shop, and provide a seat for users to rest. Users can also sit in a wheelchair and be pushed by others. To make them easier for users to store, foldable trolleys have been introduced on the market.

[0003] Currently, most foldable strollers on the market use pins or pins for locking. This locking mechanism requires manual insertion and removal, which is cumbersome and requires the user to have relatively dexterous hands. For people who already have mobility issues and need to use a stroller, this method undoubtedly increases the difficulty of use. Utility Model Content

[0004] The purpose of this invention is to provide a side frame and trolley that can solve the above problems.

[0005] To achieve the above objectives, this utility model provides a side frame, comprising:

[0006] The first support rod is equipped with a limiter; and

[0007] The second support rod is rotatably connected to the first support rod. The second support rod has a folded state that rotates from a high position to a low position relative to the first support rod, and an unfolded state that rotates from a low position to a high position. The second support rod is provided with a first limiting part and a second limiting part that are spaced apart along its rotation direction.

[0008] The limiting member can move along the length direction of the first support rod so that when the second support rod is in a folded or unfolded state, the limiting member can connect with the first limiting part or the second limiting part to limit the second support rod.

[0009] Optionally, the lower end of the second support rod is provided with a connecting sleeve, and the lower end of the connecting sleeve is provided with a limiting groove along the length direction of the first support rod. The limiting groove is adapted to the first support rod, and one end of the limiting groove is provided with a connecting part communicating with the limiting groove. The connecting part is rotatably connected to the first support rod. When the second support rod is in a folded state, the limiting groove is disconnected from the second support rod. When the second support rod is in an unfolded state, the limiting groove is connected to the second support rod.

[0010] Both the first limiting part and the second limiting part are disposed on the connecting part.

[0011] Optionally, the connecting portion is provided with a pressing portion, the first limiting portion is formed at the upper end of the pressing portion, and the second limiting portion is formed at the lower end of the pressing portion. When the connecting sleeve rotates, the pressing portion can press the limiting member so that the limiting member disengages from the first limiting portion or the second limiting portion.

[0012] Optionally, both the first limiting portion and the second limiting portion are configured as concave structures.

[0013] Optionally, the side wall of the first support rod is provided with a strip-shaped hole that extends along its length and passes through the first support rod, and the limiting member passes through the strip-shaped hole with both ends exposed.

[0014] Optionally, the limiting member has a limiting protrusion extending radially in the middle, and the diameter of the limiting protrusion is larger than the width of the strip hole;

[0015] One end of the strip-shaped hole on one of the first support rods is provided with a mounting hole that matches the limiting protrusion.

[0016] Optionally, it also includes a driving member, which is disposed on the first support rod and is capable of driving the limiting member to connect with the first limiting part and the second limiting part.

[0017] Optionally, the driving element is an elastic driving element.

[0018] This utility model also provides a trolley, including connecting rods and the aforementioned side frames. Two side frames are symmetrically arranged, and the two connecting rods are cross-arranged between the two side frames. The intersection of the two connecting rods is rotatably connected, and the upper and lower ends of the connecting rods are respectively rotatably connected to the second support rods on the two side frames, so that the two connecting rods can be retracted or expanded, and so that the two side frames can be folded or unfolded.

[0019] Optionally, the lower end of the connecting rod is provided with a pivot extending outward along its axial direction. The pivot is rotatably connected to the second support rod. The pivot is provided with a first limiting wall, and the second support rod is provided with a second limiting wall that can cooperate with the first limiting wall. When the two connecting rods are unfolded, the first limiting wall can abut against the lower end of the second limiting wall.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: By cooperating with the limiting member, the first limiting part, and the second limiting part, when the second support rod is folded, the limiting member connects with the first limiting part to limit the second support rod in the lower position, thereby improving the stability of the second support rod after folding and facilitating storage; when the second support rod is unfolded, the limiting member connects with the second limiting part to limit the second support rod in the higher position, thereby ensuring the stability of the second support rod when unfolded. The overall structure is simple, easy to operate, reduces the use of other accessories, reduces production costs, and is easy to assemble, effectively improving production efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of the present invention.

[0023] Figure 2 This is a perspective view of the connecting sleeve in this utility model.

[0024] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0025] Figure 4 This is a perspective view of the second support rod of this utility model after folding.

[0026] Figure 5 This is a side view of the second support rod of this utility model after it has been unfolded.

[0027] Figure 6 This is a perspective view of the limiting component in this utility model.

[0028] Figure 7 This is a side view of the first support rod in this utility model.

[0029] In the picture:

[0030] 100. First support rod; 110. Limiting component; 111. Limiting protrusion; 120. Strip hole; 121. Mounting hole; 130. Roller;

[0031] 200, Second support rod; 210, Connecting sleeve; 220, Limiting groove; 230, Connecting part; 231, First limiting part; 232, Second limiting part; 233, Pressing part; 240, Second limiting wall; 250, Handle;

[0032] 300. Drive components;

[0033] 400, connecting rod; 410, pivot; 411, first limiting wall; 420, support arm; seat cushion 430. Detailed Implementation

[0034] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0035] In the description of the embodiments of this utility model, it should be understood that if the embodiments of this utility model involve directional indications, such as up, down, left, right, front, back, inside, outside, etc., the orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of this utility model and simplifying the description, and is not intended to 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, it should not be construed as a limitation of this utility model.

[0036] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this embodiment of the invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. They can be mechanical or electrical connections. They can be direct connections or indirect connections through an intermediate medium, and can represent the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0038] like Figures 1 to 7 As shown, this utility model embodiment provides a side frame, including a first support rod 100, a second support rod 200, and a driving component 300.

[0039] The second support rod 200 is rotatably connected to the first support rod 100. The second support rod 200 has a folded state relative to the first support rod 100, rotating from a high position to a low position, and an unfolded state, rotating from a low position to a high position, as shown below. Figure 2As shown, the second support rod 200 is provided with a first limiting part 231 and a second limiting part 232 that are spaced apart along its rotation direction. Specifically, both the first limiting part 231 and the second limiting part 232 are designed as concave structures.

[0040] It should be noted that the upper end of the second support rod 200 is provided with a handle 250 for gripping, and the first support rod 100 is inclined upward relative to the horizontal plane to facilitate support and force. Rollers 130 are provided at both ends of the first support rod 100. Both the first support rod 100 and the second support rod 200 are hollow to reduce weight, facilitate user use, and save costs.

[0041] The first support rod 100 is provided with a limiting member 110, which is cylindrical in shape to reduce friction and improve smoothness.

[0042] The limiting member 110 can move along the length direction of the first support rod 100 so that when the second support rod 200 is in a folded or unfolded state, the limiting member 110 can be connected with the first limiting part 231 or the second limiting part 232 to limit the second support rod 200. Specifically, the driving member 300 is disposed on the first support rod 100, and the driving member 300 can drive the limiting member 110 to move along the length direction of the first support rod 100.

[0043] When the second support rod 200 is folded, the limiting member 110 connects with the first limiting part 231 to limit the second support rod 200 in the lower position, which can improve the stability of the second support rod 200 after folding and facilitate storage. When the second support rod 200 is unfolded, the limiting member 110 connects with the second limiting part 232 to limit the second support rod 200 in the higher position, so as to ensure the stability of the second support rod 200 when unfolded. The overall structure is simple, easy to operate, reduces the use of other accessories, reduces production costs, and is easy to assemble, which can effectively improve production efficiency.

[0044] In one embodiment, such as Figure 1 and 4 As shown, a connecting sleeve 210 is provided at the lower end of the second support rod 200. It should be noted that the connecting sleeve 210 and the second support rod 200 can be set separately or as an integral part, depending on the design requirements.

[0045] Furthermore, such as Figure 2 and 4As shown, the lower end of the connecting sleeve 210 is provided with a limiting groove 220 arranged along the length direction of the first support rod 100. The limiting groove 220 is U-shaped and is adapted to the first support rod 100. One end of the limiting groove 220 is provided with a connecting part 230 that communicates with the limiting groove 220. The connecting part 230 is rotatably connected to the first support rod 100. Specifically, the upper end of the connecting part 230 is hollowed out to avoid interference, so that the second support rod 200 can rotate from a high position to a low position.

[0046] Furthermore, when the second support rod 200 is in the folded state, the limiting groove 220 is disengaged from the second support rod 200. When the second support rod 200 is in the unfolded state, the limiting groove 220 is connected to the second support rod 200. The first limiting part 231 and the second limiting part 232 are both provided on the connecting part 230. That is, through the cooperation of the limiting groove 220 with the first support rod 100 and the second limiting part 232 with the limiting member 110, the unfolded second support rod 200 is limited to ensure the stability of the second support rod 200 after unfolding.

[0047] In one embodiment, such as Figure 2 and 3 As shown, a pressing part 233 is provided on the connecting part 230. A first limiting part 231 is formed at the upper end of the pressing part 233, and a second limiting part 232 is formed at the lower end of the pressing part 233. When the connecting sleeve 210 rotates, the pressing part 233 can press the limiting member 110, so that the limiting member 110 disengages from the first limiting part 231 or the second limiting part 232. The driving member 300 is preferably an elastic driving member. More specifically, the elastic driving member is a spring or an elastic rope. In this embodiment, the elastic driving member is preferably a spring, and the spring is provided at the lower end of the connecting part 230. Inside the first rod 100, the two ends of the spring are connected to the limiting member 110 and the first rod 100 respectively. When the user applies a certain force, the squeezing part 233 can squeeze and push the limiting member 110 to move. At this time, the spring deforms, and the limiting member 110 disengages from the first limiting part 231 or the second limiting part 232. Furthermore, when the limiting member 110 corresponds to the first limiting part 231 or the second limiting part 232, the spring will reset to drive the limiting member 110 to be limited on the first limiting part 231 or the second limiting part 232. The operation is convenient and the cost is low.

[0048] In one embodiment, such as Figure 3 and 7 As shown, a strip hole 120 is provided on the side wall of the first support rod 100, which is arranged along its length and passes through the first support rod 100. The limiting member 110 passes through the strip hole 120, and its two ends are exposed. The strip hole 120 limits and guides the limiting member 110 to ensure the stability of the movement of the limiting member 110.

[0049] In one embodiment, such as Figure 3 and 7As shown, a limiting protrusion 111 extending radially is provided in the middle of the limiting member 110. The diameter of the limiting protrusion 111 is larger than the width of the strip hole 120, thereby limiting the limiting member 110 and preventing it from falling out of the strip hole 120. In order to facilitate the installation of the limiting member 110, a mounting hole 121 adapted to the limiting protrusion 111 is provided at one end of the strip hole 120 on one of the first support rods 100. During disassembly and assembly, it is only necessary to align the limiting protrusion 111 with the mounting hole 121.

[0050] It should be noted that in some embodiments, the driving component 300 may also be an electric push rod, etc., wherein a control switch (not shown in the figure) is provided on the handle. When it is necessary to fold or unfold the second support rod 200, pressing the switch will cause the electric push rod to drive the limiting component 110 to disengage from the first limiting part 231 or the second limiting part 232 so that the second support rod 200 can be unfolded or folded.

[0051] like Figures 1 to 7 As shown, this utility model also provides a trolley, including a connecting rod 400 and a side frame as described in any of the above embodiments. Two side frames are symmetrically arranged, and two connecting rods 400 are cross-arranged between the two side frames. The intersection of the two connecting rods 400 is rotatably connected. The upper and lower ends of the connecting rods 400 are respectively rotatably connected to the second support rods 200 on the side frames. Specifically, the upper end of the connecting rod 400 is rotatably connected to the second support rod 200 via a connecting plate, and the lower end of the connecting rod 400 is rotatably connected to a connecting sleeve 210, so that the two connecting rods 400 can retract or unfold, allowing the side frames to fold or unfold. Specifically, the upper end of the connecting rod is provided with a support arm 420 extending outward along it. The support arm 420 on the two connecting rods 400 can be fitted with a seat cushion 430 for user use. The user can apply force inward or outward by grasping the two support arms 420, causing the two connecting rods 400 to retract or unfold, allowing the side frames to fold or unfold for storage or use. The overall structure of this trolley is simple and easy to operate.

[0052] In one embodiment, such as Figure 4 As shown, the lower end of the connecting rod 400 is provided with a rotating shaft 410 extending outward along its axial direction. The rotating shaft 410 is rotatably connected to the second support rod 200. Specifically, the rotating shaft 410 is rotatably connected to the connecting sleeve 210 and is inclined upward relative to the horizontal plane. A first limiting wall 411 is provided on the rotating shaft 410, and a second limiting wall 240 that can cooperate with the first limiting wall 411 is provided on the second support rod 200. When the two connecting rods 400 are unfolded, the first limiting wall 411 can abut against the lower end of the second limiting wall 240, thereby limiting the unfolded connecting rod 400, which can improve the stability of the connecting rod 400 after unfolding, make it more force-bearing, and facilitate user use.

[0053] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A side frame, characterized in that, The utility model relates to a side frame, comprising: a first supporting rod (100) provided with a limiting piece (110) thereon; and a second supporting rod (200) rotatably connected with the first supporting rod (100), the second supporting rod (200) having a folding state of rotating from a high position to a low position relative to the first supporting rod (100) and an unfolding state of rotating from the low position to the high position, the second supporting rod (200) being provided with a first limiting part (231) and a second limiting part (232) spaced apart along the rotating direction thereof; the limiting piece (110) being movable along the length direction of the first supporting rod (100) so that the limiting piece (110) can be connected with the first limiting part (231) or the second limiting part (232) when the second supporting rod (200) is in the folding state or the unfolding state to limit the second supporting rod (200).

2. The side frame according to claim 1, wherein a connecting sleeve (210) is arranged at the lower end of the second supporting rod (200), the lower end of the connecting sleeve (210) is provided with a limiting groove (220) arranged along the length direction of the first supporting rod (100), the limiting groove (220) is matched with the first supporting rod (100), one end of the limiting groove (220) is provided with a connecting part (230) in communication with the limiting groove (220), the connecting part (230) is rotatably connected with the first supporting rod (100), the limiting groove (220) is disconnected with the second supporting rod (200) when the second supporting rod (200) is in the folding state, and the limiting groove (220) is connected with the second supporting rod (200) when the second supporting rod (200) is in the unfolding state; the first limiting part (231) and the second limiting part (232) are both arranged on the connecting part (230).

3. The side frame according to claim 2, wherein a pressing part (233) is arranged on the connecting part (230), the first limiting part (231) is formed at the upper end of the pressing part (233), the second limiting part (232) is formed at the lower end of the pressing part (233), and the pressing part (233) can press the limiting piece (110) to disconnect the limiting piece (110) from the first limiting part (231) or the second limiting part (232) when the connecting sleeve (210) rotates.

4. The side frame according to claim 3, wherein the first limiting part (231) and the second limiting part (232) are both provided in a concave structure.

5. The side frame according to claim 1, wherein a strip-shaped hole (120) is arranged on the side wall of the first supporting rod (100) along the length direction thereof and penetrates through the first supporting rod (100), the limiting piece (110) passes through the strip-shaped hole (120) and the two ends thereof are exposed.

6. The side frame according to claim 5, wherein A middle part of the limiting piece (110) is provided with a limiting protrusion (111) extending along a radial direction thereof, and a diameter of the limiting protrusion (111) is greater than a width of the strip-shaped hole (120); One end of the strip-shaped hole (120) on one of the first supporting rods (100) is provided with a mounting hole (121) matched with the limiting protrusion (111).

7. A side frame according to claim 1, wherein Further comprising: A driving piece (300) is arranged on the first supporting rod (100), and the driving piece (300) can drive the limiting piece (110) to move along a length direction of the first supporting rod (100).

8. The side frame according to claim 7, characterized in that, The driving piece (300) is an elastic driving piece.

9. A cart characterized by, The side frame according to any one of claims 1 to 8, further comprising a connecting rod (400), and two of the side frames are symmetrically arranged, the connecting rod (400) is arranged between the two side frames in a cross manner, the connecting rod (400) is rotatably connected at a cross position, and upper and lower ends of the connecting rod (400) are rotatably connected with the second supporting rods (200) of the two side frames, so that the two connecting rods (400) can be retracted or expanded, and the two side frames can be folded or unfolded.

10. The stroller according to claim 9, characterized in that, The lower end of the connecting rod (400) is provided with a rotating shaft (410) extending outward along an axial direction thereof, the rotating shaft (410) is rotatably connected with the second supporting rod (200), the rotating shaft (410) is provided with a first limiting wall (411), the second supporting rod (200) is provided with a second limiting wall (240) matched with the first limiting wall (411), and when the two connecting rods (400) are unfolded, the first limiting wall (411) can abut against a lower end of the second limiting wall (240).

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