A seat cushion and folding trolley

Abstract

The application provides a cushion and a folding trolley. The cushion comprises a flexible cover and a plurality of filling blocks. The flexible cover is provided with a first folding guide part extending along the left-right direction of the cushion. The first folding guide part separates the internal space of the flexible cover into a plurality of chambers. The first folding guide part is used to form a crease to define a folding path of the flexible cover. Each filling block is filled in a chamber. Thus, the filling cavities are formed in the flexible cover by the folding guide part, and one filling block is filled in each filling cavity, so as to improve the comfort of sitting, protect the filling blocks, and prolong the service life of the cushion.

Description

Technical Field

[0001] This application belongs to the field of folding trolley technology, and particularly relates to a seat cushion and a folding trolley. Background Technology

[0002] Foldable portable cushions in related technologies often use a design where multiple independent filling blocks are connected by sewing fabric. The filling units are connected by sewing the fabric to achieve folding. However, this type of structure has obvious defects. The filling units are only connected by sewing fabric, resulting in an uneven supporting surface when unfolded. They also lack complete wrapping and protection, making them prone to stains and wear. Furthermore, the connecting parts are the main stress points when folding, and frequent use can easily cause them to break or misalign, resulting in insufficient durability.

[0003] Therefore, there is an urgent need for a seat cushion and a folding stroller to solve the above problems. Utility Model Content

[0004] This application provides a seat cushion and a folding trolley to at least solve the aforementioned problems in the related art.

[0005] To achieve the above objectives, this application provides the following technical solution: a seat cushion, comprising: The flexible sleeve has a first folding guide portion that extends along the left and right direction of the seat cushion. The first folding guide portion divides the internal space of the flexible sleeve into multiple chambers and is used to form creases to limit the folding path of the flexible sleeve. Multiple filler blocks, each filling a corresponding chamber.

[0006] In some alternative embodiments, the flexible sleeve has mounting through holes on both the left and right sides, which extend along the front-to-back direction of the seat cushion. The seat cushion also includes a folding rod, which is inserted into a mounting through hole in the front-to-back direction and is used to connect to the external trolley body; wherein, The folding rod is used to drive the flexible sleeve to fold along the first folding guide.

[0007] In some alternative implementations, the folding rod includes a first rod body, a second rod body, and a third rod body; The second rod is positioned between the first and third rods, with its two ends rotatably connected to the first and third rods, respectively; wherein... The second rod is distributed along the extension direction of the first folding guide. The rotational connection axis between the first rod and the second rod, and the rotational connection axis between the second rod and the third rod are both parallel to the extension direction of the first folding guide. The second rod is used to support the thickness of the seat cushion when it is folded. The first rod and the third rod cooperate with the rotation of the second rod to drive the flexible sleeve to fold along the first folding guide.

[0008] In some alternative implementations, each mounting through hole has a notch, and the second rod is located at the notch, which provides clearance for the flexible sleeve to fold at the mounting through hole.

[0009] In some alternative embodiments, the flexible sleeve is further provided with a second folding guide that extends along the front-to-back direction of the seat cushion. The second folding guide and the first folding guide simultaneously isolate the internal space of the flexible sleeve and form multiple chambers.

[0010] In some alternative embodiments, there are multiple second folding guides, which are spaced apart in the left-right direction and form a cross grid with the first folding guides.

[0011] In some alternative implementations, the flexible sleeve includes an upper flexible sleeve and a lower flexible sleeve, and the edges of the upper and lower flexible sleeves are connected by a crimping process to form an internal space.

[0012] In some alternative implementations, the first fold guide is formed by a crimping process.

[0013] In some alternative implementations, the second fold guide is formed by a crimping process.

[0014] In some alternative embodiments, this application also provides a folding trolley, which includes a seat, a left support, a right support, and a cross-scissor folding support. The left end of the seat cushion is fixedly connected to the left support, and the right end of the seat cushion is fixedly connected to the right support. The cross-scissor foldable bracket is located between the left and right brackets and is used to drive the left and right brackets to fold closer to each other or unfold further apart in the left and right direction.

[0015] In the aforementioned cushion, on the one hand, the flexible sleeve is divided into multiple independent chambers by the first folding guide, with each filling block corresponding to one chamber. The chambers provide all-round constraint on the filling blocks, completely solving the problem of easy displacement and stacking of filling blocks that rely solely on sewn fabric for connection in related technologies. After unfolding, the filling blocks are evenly distributed, the support surface is flat and smooth, and the sitting experience is more comfortable. On the other hand, the flexible sleeve forms a complete wrapping structure, with the filling blocks enclosed within the chambers. This avoids the defects of filling blocks being exposed and easily getting dirty or worn at the edges, as is common in related technologies. It effectively protects the filling blocks, makes cleaning easier, and allows them to maintain a good condition even after long-term use. Furthermore, it eliminates the design of relying on sewn fabric to connect the filling blocks, as is common in related technologies. The synergistic structure of the chambers and filling blocks disperses the folding force, avoiding the problem of the connecting parts being easily broken or misaligned as a single stress point. The structure is more stable during folding, and it can maintain its complete shape even with frequent use, extending the product's service life. In this way, the folding guide section forms a filling cavity inside the flexible sleeve, and a filling block is filled in each filling cavity to improve the sitting comfort, store and protect the filling block, and extend the service life of the seat cushion.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0017] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, wherein: In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0018] Figure 1 A schematic diagram of the seat cushion structure in an embodiment of this application is shown; Figure 2 It shows Figure 1 A schematic diagram of the exploded structure of the middle seat cushion; Figure 3 The diagram shows a partial structure of the support component and a structural schematic of the locking component; Figure 4 It shows Figure 3 A structural schematic diagram of part of the load-bearing component; Figure 5 A schematic diagram of a portion of the structure of the folding handcart in an embodiment of this application is shown.

[0019] The following are the labeling instructions in the diagram: 10, seat cushion; 11, flexible sleeve; 111, first folding guide; 112, second folding guide; 113, mounting through hole; 114, notch; 12, filling block; 13, folding rod; 131, first rod body; 132, second rod body; 133, third rod body; 20, left bracket; 30, right bracket; 40, cross-scissor foldable bracket. Detailed Implementation

[0020] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.

[0022] 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 at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Foldable portable cushions in related technologies often use a design where multiple independent filling blocks are connected by sewing fabric. The filling units are connected by sewing the fabric to achieve folding. However, this type of structure has obvious defects. The filling units are only connected by sewing fabric, resulting in an uneven supporting surface when unfolded. They also lack complete wrapping and protection, making them prone to stains and wear. Furthermore, the connecting parts are the main stress points when folding, and frequent use can easily cause them to break or misalign, resulting in insufficient durability.

[0024] To address the aforementioned issues, researchers discovered that folding the guide section to create filling cavities within the flexible sleeve, and filling each cavity with a filler block, can solve these problems.

[0025] Please see Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of the seat cushion 10 is shown. Figure 2A cross-sectional view of the seat cushion 10 along the II-II direction is shown. In some embodiments, this application discloses a seat cushion 10, which includes a flexible sleeve 11 and a plurality of filling blocks 12. The flexible sleeve 11 is provided with a first folding guide 111, which extends along the left-right direction of the seat cushion 10. The first folding guide 111 isolates the internal space of the flexible sleeve 11 into a plurality of chambers, and the first folding guide 111 is used to form creases to define the folding path of the flexible sleeve 11. Each filling block 12 is filled into one chamber.

[0026] In the aforementioned seat cushion 10, on the one hand, the flexible sleeve 11 is divided into multiple independent chambers by the first folding guide 111, with each filling block 12 corresponding to one chamber. The chambers provide all-round limiting constraints on the filling blocks 12, completely solving the problem of easy displacement and stacking of the filling blocks 12 in related technologies where they are only connected by sewn fabric. After unfolding, the filling blocks 12 are evenly distributed, the support surface is flat and smooth, and the sitting feel is more comfortable. On the other hand, the flexible sleeve 11 forms a complete wrapping structure, and the filling blocks 12 are sealed in the chambers, avoiding the defects of the filling blocks 12 being exposed to the outside and easily getting dirty and worn at the edges in related technologies, effectively protecting the filling blocks 12. Furthermore, it is easier to clean and can maintain a good condition even after long-term use. On the other hand, it eliminates the design of relying on sewn fabric to connect the filling block 12 in related technologies. By dispersing the folding force through the synergistic structure of the cavity and the filling block 12, it avoids the problem of the connection part being a single stress point that is prone to breakage and misalignment. The structure is more stable during folding and can maintain its integrity even with frequent use, thus extending the product's service life. In this way, the folding guide creates a filling cavity inside the flexible sleeve 11, and a filling block 12 is filled in each filling cavity, which can improve the comfort of sitting, store and protect the filling block 12, and extend the service life of the cushion 10.

[0027] In some specific embodiments, the number of first folding guides 111 can be one or two.

[0028] Please see Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of the folding rod 13; Figure 4 This is a structural schematic diagram of a portion of the seat cushion 10. In some embodiments, the flexible sleeve 11 has mounting through holes 113 on both the left and right sides, and the mounting through holes 113 extend along the front-rear direction of the seat cushion 10. The seat cushion 10 also includes a folding rod 13, which is inserted into the mounting through hole 113 along the front-rear direction and is used to connect with the external trolley body. The folding rod 13 is used to drive the flexible sleeve 11 to fold along the first folding guide 111.

[0029] Thus, the folding rod 13 is inserted into the mounting through holes 113 on the left and right sides of the flexible sleeve 11 in the front-to-back direction and connected to the trolley body. When the trolley is folded, the folding rod 13 is simultaneously subjected to force, which drives the flexible sleeve 11 to bend in the first folding guide part 111. This operation process not only realizes the installation connection between the cushion 10 and the trolley, but also transmits the folding force through the folding rod 13 and fixes the position of the cushion 10. Finally, it achieves the technical effect of folding the cushion 10 and the trolley in one piece, making the operation more convenient, the positioning is accurate and there is no displacement when using, the assembly is simple and the force is distributed, and the flexible sleeve 11 is protected.

[0030] Please see Figure 3 In some embodiments, the folding rod 13 includes a first rod 131, a second rod 132, and a third rod 133; the second rod 132 is disposed between the first rod 131 and the third rod 133, and both ends of the second rod 132 are rotatably connected to the first rod 131 and the third rod 133, respectively; wherein, the second rod 132 is distributed along the extension direction of the first folding guide portion 111, and the rotational connection axis between the first rod 131 and the second rod 132, and the rotational connection axis between the second rod 132 and the third rod 133 are both parallel to the extension direction of the first folding guide portion 111; the second rod 132 is used to support the thickness of the cushion 10 when folded, and the first rod 131 and the third rod 133 drive the flexible sleeve 11 to fold along the first folding guide portion 111 through rotational cooperation with the second rod 132.

[0031] In this way, when the trolley is folded, the folding rod 13 is subjected to force. The first rod 131 and the third rod 133 rotate around the axis parallel to the first folding guide 111 connected to the second rod 132. The second rod 132 is distributed along the direction of the first folding guide 111 and supports the thickness of the seat cushion 10 when folded. This actuation process realizes the functions of segmented and uniform transmission of folding force, supporting the folding thickness, and ensuring that the rotation of the rod is adapted to the folding path.

[0032] Please see Figure 4 In some embodiments, each mounting through hole 113 is provided with a notch 114, and the second rod 132 is located at the notch 114. The notch 114 is used to provide clearance space for the flexible sleeve 11 at the mounting through hole 113 to fold.

[0033] Thus, when the seat cushion 10 is folded, the flexible sleeve 11 at the mounting through hole 113 bends along the crease, and the notch 114 provides space corresponding to the position of the second rod 132. This achieves the function of allowing the flexible sleeve 11 to avoid folding, preventing interference with the second rod 132, and protecting the structure of the flexible sleeve 11. This makes the folding process smooth and without jamming, and the flexible sleeve 11 avoids being squeezed and damaged by friction, extends its service life, and makes the structural design more reasonable.

[0034] In some embodiments, the flexible sleeve 11 is further provided with a second folding guide portion 112, which extends along the front-rear direction of the seat cushion 10. The second folding guide portion 112 and the first folding guide portion 111 simultaneously isolate the internal space of the flexible sleeve 11 and form multiple chambers.

[0035] Thus, the first folding guide 111 extends left and right, and the second folding guide 112 extends front and back. The two cross and divide the interior of the flexible sleeve 11 to form multiple independent chambers. After the filling block 12 is filled, it bends in coordination with the folds of the two guides, realizing multi-dimensional isolation and positioning of the filling block 12 and bi-directional guided folding, so as to fold the cushion 10 into a smaller size, thereby adapting to application scenarios with smaller folding space.

[0036] In some embodiments, there are multiple second folding guides 112, which are spaced apart in the left-right direction and form a cross grid with the first folding guides 111.

[0037] Thus, multiple second folding guides 112 are arranged at intervals along the left and right directions, forming a cross grid with the first folding guide 111, dividing the space into matrix-style independent chambers. When folding, the flexible sleeve 11 bends synchronously along the grid creases, realizing fine and uniform partitioning of the filling block 12 and multi-path guided folding, thereby making the folded shape of the cushion 10 more regular and the volume smaller.

[0038] In some specific embodiments, the number of second folding guides 112 is one, two, or three.

[0039] In some embodiments, the flexible sleeve 11 includes an upper flexible sleeve 11 and a lower flexible sleeve 11, and the edges of the upper flexible sleeve 11 and the lower flexible sleeve 11 are connected by a crimping process to form an internal space.

[0040] In this way, the upper flexible sleeve 11 and the lower flexible sleeve 11 are connected by the edge pressing process to form a closed internal space. After the filling block 12 is inserted, it is completely wrapped. The connection part remains firm when folded and used. This operation process realizes the functions of sealing and forming the flexible sleeve 11, sealing and protecting the filling block 12, and fixing the structure of the flexible sleeve 11. This makes the flexible sleeve 11 provide comprehensive protection, easy to clean, and the connection part is firm and not easy to crack, extending its service life. The process is simple and reliable, and the appearance is neat and beautiful.

[0041] In some embodiments, the first folding guide 111 is formed by a stitching process. Exemplarily, the stitching process can be sewing machine stitching.

[0042] Thus, by forming the first folding guide portion 111 on the flexible sleeve 11 through the creasing process, a fixed and firm crease is formed at this position. When folding, the flexible sleeve 11 bends along the crease first. Moreover, the creasing process does not require additional connecting parts and is integrally formed with the flexible sleeve 11. This operation process not only realizes the function of forming a clear folding path and strengthening the folding direction guidance through crease formation, but also takes advantage of the advantages of the creasing process, such as firm connection, efficient forming and integrated structure, to avoid the foreign object feeling caused by additional parts.

[0043] In some embodiments, the second folding guide portion 112 is formed by a crimping process.

[0044] Thus, by forming a second folding guide portion 112 on the flexible sleeve 11 through the creasing process, a fixed and firm crease is formed at this position. When folding, the flexible sleeve 11 bends along the crease first. Moreover, the creasing process does not require additional connectors and is integrally formed with the flexible sleeve 11. This operation process not only realizes the function of forming a clear folding path and strengthening the folding direction guidance through crease formation, but also takes advantage of the advantages of the creasing process, such as firm connection, efficient forming and integrated structure, to avoid the foreign object feeling caused by additional parts.

[0045] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of a folding trolley; in some embodiments, this application also provides a folding trolley, which includes a seat cushion 10, a left support 20, a right support 30, and a cross-scissor foldable support 40; the left end of the seat cushion 10 is fixedly connected to the left support 20, and the right end of the seat cushion 10 is fixedly connected to the right support 30; the cross-scissor foldable support 40 is disposed between the left support 20 and the right support 30, and is used to drive the left support 20 and the right support 30 to fold closer to each other or unfold further apart in the left and right directions.

[0046] In this way, the folding trolley uses a cross-scissor foldable bracket 40 to drive the left and right brackets 30 to fold closer or unfold in the left and right directions. Since the two ends of the seat 10 are directly fixed to the left and right brackets 30 respectively, the bracket movement can be transmitted to the seat 10 synchronously and pull it to bend or extend precisely along its own folding guide. This linkage design not only realizes the synchronous folding or unfolding of the frame and the seat 10 without the need for additional operation of the seat 10, but also prevents the seat 10 from shifting during use or folding through rigid fixation. Combined with the uniform force distribution of the cross-scissor bracket and the synergistic effect of the folding guide structure of the seat 10, it not only makes the folding operation more convenient and efficient, the folded shape more regular and compact, and the storage space smaller, but also forms a synergistic force distribution system, reduces local force concentration, and improves structural durability. At the same time, the frame provides rigid support for the seat 10 after unfolding, and with the flat support surface of the filling block 12 with zoned positioning, it takes into account both riding stability and comfort. Moreover, the overall structure is simple and adaptable to a variety of storage and usage scenarios.

[0047] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A seat cushion (10), characterized in that, The cushion (10) includes: A flexible sleeve (11) is provided with a first folding guide (111), which extends along the left and right direction of the cushion (10). The first folding guide (111) divides the internal space of the flexible sleeve (11) into multiple chambers and is used to form creases to define the folding path of the flexible sleeve (11). Multiple filling blocks (12), each filling block (12) is filled in one of the chambers.

2. The cushion (10) according to claim 1, characterized in that, The flexible sleeve (11) is provided with mounting through holes (113) on both the left and right sides, and the mounting through holes (113) extend along the front and back direction of the seat cushion (10). The seat cushion (10) also includes a folding rod (13), which is inserted into the mounting through hole (113) in the front-to-back direction and is used to connect with the external trolley body; wherein, The folding rod (13) is used to drive the flexible sleeve (11) to fold along the first folding guide (111).

3. The cushion (10) according to claim 2, characterized in that, The folding rod (13) includes a first rod body (131), a second rod body (132) and a third rod body (133). The second rod (132) is disposed between the first rod (131) and the third rod (133), and the two ends of the second rod (132) are respectively rotatably connected to the first rod (131) and the third rod (133); wherein, The second rod (132) is distributed along the extension direction of the first folding guide (111). The rotational connection axis between the first rod (131) and the second rod (132), and the rotational connection axis between the second rod (132) and the third rod (133) are both parallel to the extension direction of the first folding guide (111). The second rod (132) is used to support the thickness of the cushion (10) when it is folded. The first rod (131) and the third rod (133) drive the flexible sleeve (11) to fold along the first folding guide (111) by rotating with the second rod (132).

4. The cushion (10) according to claim 3, characterized in that, Each of the mounting through holes (113) is provided with a notch (114), and the second rod (132) is located at the notch (114), which is used to provide clearance space for the flexible sleeve (11) at the mounting through hole (113) to fold.

5. The cushion (10) according to claim 1, characterized in that, The flexible sleeve (11) is also provided with a second folding guide (112), which extends along the front and rear direction of the cushion (10). The second folding guide (112) and the first folding guide (111) simultaneously isolate the internal space of the flexible sleeve (11) and form multiple chambers.

6. The cushion (10) according to claim 5, characterized in that, There are multiple second folding guides (112), and the multiple second folding guides (112) are spaced apart in the left and right direction, forming a cross grid with the first folding guide (111).

7. The cushion (10) according to claim 1, characterized in that, The flexible sleeve (11) includes an upper flexible sleeve (11) and a lower flexible sleeve (11). The edges of the upper flexible sleeve (11) and the lower flexible sleeve (11) are connected by a crimping process to form an internal space.

8. The cushion (10) according to claim 1, characterized in that, The first folding guide (111) is formed by a crimping process.

9. The cushion (10) according to claim 5, characterized in that, The second folding guide (112) is formed by a crimping process.

10. A folding handcart, characterized in that, The folding trolley includes a seat cushion (10), a left support (20), a right support (30), and a cross-scissor folding support (40) as described in any one of claims 1-9. The left end of the seat cushion (10) is fixedly connected to the left support (20), and the right end of the seat cushion (10) is fixedly connected to the right support (30). The cross-scissor foldable bracket (40) is located between the left bracket (20) and the right bracket (30), and is used to drive the left bracket (20) and the right bracket (30) to fold closer to each other or unfold away from each other in the left and right direction.

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