Patent Application
20250194821
The present invention relates to the technical field of inflatable products, specifically to a pull strap for an inflatable product and the inflatable product itself.
Inflatable products such as inflatable beds and inflatable mattresses are typically made from PVC or PU laminated fabrics. To define the shape of the inflatable bed and mattress after inflation, so that they resemble traditional beds or mattresses, multiple pull straps need to be installed inside. These pull straps are usually connected to the top sheet and bottom sheet, or to the top sheet and side sheet, or to the bottom sheet and side sheet of the inflatable bed and mattress. Of course, the pull straps can also adopt different connection methods according to the different internal structures of the inflatable bed and mattress. When inflated, the internal pull straps will be tightened. However, traditional pull straps are generally made of PVC or PU sheets, which have low tensile strength, causing the pull straps to stretch and deform. Therefore, it's necessary to control the inflation pressure; otherwise, the pull straps can easily stretch excessively or break. Moreover, traditional pull straps are made from a whole piece of PVC or PU sheet, resulting in a relatively high overall weight of the inflatable product, increasing logistics costs and making production operations less convenient for staff. Therefore, further improvements or optimizations are necessary.
The purpose of the present invention is to provide a pull strap for an inflatable product and the inflatable product itself, featuring a simple and lightweight structure, occupying less space, and having high tensile strength, to solve the aforementioned problems.
The present invention provides a pull strap for an inflatable product, characterized in that it includes a pull strap body, mesh cloth, and an annular fixing piece. The pull strap body has a through hollow portion, the mesh cloth has multiple through holes, and the mesh cloth is sandwiched between the edge of the hollow portion of the pull strap body and the annular fixing piece. The pull strap body and the annular fixing piece are made of thermoplastic flexible sheet material, and both ends of the pull strap body are provided with arc-shaped notches.
Further, the mesh cloth at least partially covers the hollow portion.
Further, the mesh cloth is made of woven cotton threads or synthetic fiber threads and can be one or more pieces.
Further, the hollow portion is in a chamfered square shape or a circular shape.
Further, the through holes on the mesh cloth are arranged continuously or at intervals, and the size of the mesh cloth is larger than that of the hollow portion.
Further, the thermoplastic flexible sheet material is a PVC sheet or a PU sheet.
An inflatable product, comprising a top sheet, a bottom sheet, and a side sheet that are sequentially welded and fixed to form an enclosed inflatable air chamber, characterized in that the inflatable air chamber is provided with the aforementioned pull strap. Both ends of the pull strap body are provided with arc-shaped notches, designed in a semi-circular or semi-elliptical shape to prevent the pull strap from breaking due to excessive stress concentration at both ends when the inflatable product is inflated and the pull strap is tightened. The pull strap is vertically welded and fixed or horizontally welded and fixed inside the inflatable air chamber.
In the present invention, the pull strap body is provided with a hollow portion to achieve simultaneous weight reduction of multiple pull straps. Compared with the prior art, the weight reduction ratio reaches 52%, which helps reduce the overall weight of the inflatable product, save on packaging and logistics costs, and facilitate production and assembly by staff. By adding mesh cloth and annular fixing pieces, the tensile strength of the pull strap is significantly improved while reducing weight, effectively preventing tensile deformation and breakage, thus increasing the durability of the inflatable product. Additionally, the through holes of the mesh cloth allow the inflatable product to increase airflow speed during inflation or deflation, improving breathability and reducing waiting time. When external force is applied to the pull strap, the mesh cloth, with its excellent tensile strength and low elongation, can effectively distribute stress, prevent excessive deformation or damage to the pull strap body, and enhance the product's competitiveness.
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only a part of the embodiments of the present invention, not all of them. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the invention.
In the description of the present invention, it should be understood that terms like “center,” “longitudinal,” “transverse,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” “outside,” “clockwise,” and “counterclockwise” indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. They are for the convenience of describing the invention and simplifying the description, not to indicate or imply that the referred devices or elements must have specific orientations or be constructed and operated in specific orientations. Therefore, they should not be construed as limitations of the invention.
In this embodiment, the inflatable air chamber 4 is provided with eight pull straps 5 arranged in parallel at intervals. The number of pull straps 5 can be increased or decreased based on the size of the inflatable air chamber 4. Both ends of the pull strap 5 are provided with arc-shaped notches 51, which are designed in a semi-circular or semi-elliptical shape. The purpose of this design is to prevent excessive stress concentration at both ends of the pull strap when the inflatable product is inflated and the pull strap is tightened, thereby avoiding breakage of the pull strap. Multiple pull straps 5 are connected to the top sheet 1 and bottom sheet 2 by high-frequency welding. By setting pull straps, the inflatable product is constrained to achieve the expected shape. In this embodiment, the pull straps 5 are linear; in specific implementations, they can also be set to wavy shapes as needed.
The pull strap 5 is provided with a hollow portion 52, formed at its center by cutting equipment. The pull strap 5 is additionally provided with mesh cloth 531 having multiple through holes. The through holes on the mesh cloth 531 are arranged continuously, and can be hexagonal, circular, rectangular, or irregular shapes. The size of the mesh cloth 531 is larger than that of the hollow portion 52. During production, the mesh cloth 531 is placed between the pull strap 5 and the annular fixing piece 532, covering the hollow portion 52. The edges of the mesh cloth 531, the edges of the hollow portion 52, and the annular fixing piece 532 are fixedly connected by high-frequency welding. Since the pull strap body 5 and the annular fixing piece 532 are made of thermoplastic flexible sheet material, specifically PVC sheets, the annular fixing piece 532 and the pull strap body 5 can be thermally fused using high-frequency welding. This process allows the fusion through the through holes of the mesh cloth 531, thereby securing the mesh cloth 5.31 over the hollow portion 5.2. This design facilitates easy processing and forming of the pull strap during manufacturing. With the mesh cloth 531 and annular fixing piece 532, the tensile strength of the pull strap 5 is significantly improved while reducing weight, effectively preventing tensile deformation and breakage, thus increasing the product's durability. Additionally, the through holes of the mesh cloth 531 allow increased airflow speed during inflation or deflation, improving breathability and reducing waiting time. When external force acts on the pull strap 5, the mesh cloth can effectively disperse stress, preventing excessive deformation or damage.
The above description illustrates the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the invention is not limited by the above embodiments. The described embodiments and the specification are merely preferred examples, not intended to limit the invention. Various changes and improvements can be made without departing from the spirit and scope of the invention, and these changes and improvements fall within the scope of the invention as defined by the appended claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2023234527436 | Dec 2023 | CN | national |
