A down quilt with uniform filling

Abstract

The utility model relates to down quilt technical field especially, relates to a kind of down quilt of even filling, including protective cover, the surface of the protective cover is equipped with horizontal and vertical staggered seam, the protective cover is divided into multiple independent square area with 30 centimeters side length by the seam;The top center of each square area is equipped with the opening for the filling tube of filling machine insertion, and the top of the protective cover is sewn with long strip edge bar.The utility model aims at the phenomenon of traditional protective cover because of the whole communication, the filling tube is moved inside and drives down migration, and the present application is divided into independent 30 centimeter side length square area by horizontal and vertical seam, each area is independently closed, and the flowing channel of down between area is blocked on physical structure, avoid the risk of down stringing during filling process and subsequent use, guarantee the stability of the filling amount of each area from the root.

Description

Technical Field

[0001] This utility model relates to the field of down comforter technology, and in particular to a down comforter with uniform down filling. Background Technology

[0002] Currently, down comforters are widely used due to their excellent warmth retention. Their core structure includes a protective cover for containing down. To prevent the down from piling up excessively or being unevenly distributed inside the protective cover, stitching is usually installed on the surface of the protective cover. The protective cover is divided into multiple areas (such as square areas) by crisscrossing stitching to achieve initial zoning and constraint of the down.

[0003] However, the existing partitioned design of down comforter covers has significant flaws: to facilitate the filling process, the partitions inside the cover are interconnected. During filling, the entire filling tube of the filling machine must be inserted into the cover, and then the filling tube is moved to fill each partition sequentially. During this process, the movement of the filling tube causes the already filled down inside the cover to shift, resulting in a "down crossover" phenomenon—that is, down from some areas is carried to other areas. This causes a large deviation between the actual filling amount in each partition and the preset value, ultimately resulting in some areas of the down comforter being too thick and others too thin, severely affecting the uniformity of warmth.

[0004] Meanwhile, the interconnected structure increases the complexity of the down filling process: to reduce down cross-contamination, the movement speed of the filling tubes needs to be controlled and the filling amount frequently adjusted, which not only reduces production efficiency but also requires additional manual inspection and secondary adjustment processes, leading to increased production costs. In addition, the down that has cross-contaminated is prone to further agglomeration due to friction and compression during long-term use, exacerbating the problem of uneven thickness in down comforters. Utility Model Content

[0005] The purpose of this invention is to provide a down comforter with uniform down filling, which solves the problems of down cross-contamination and uneven filling during the filling process caused by the interconnection of different sections in traditional down comforter covers, as well as the resulting low production efficiency, high labor costs, down aggregation during product use, unstable warmth retention, and short service life.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A down comforter with uniform down filling includes a protective cover. The surface of the protective cover has crisscrossing horizontal and vertical stitches that divide the cover into multiple independent square areas with sides of 30 centimeters. Each square area has an opening at the top center for inserting the down filling tube of a down filling machine. The top of the protective cover is sewn with a long strip of edge trim. The edge trim has the same overall length as the protective cover and is divided into segments corresponding to the square areas by the stitches. Each segment of the edge trim has a notch corresponding to the opening. A ring-shaped tightening band is provided at the notch. The tightening band is tightened in the normal state. During down filling, the down filling tube can pass through the notch and the tightening band and extend into the interior of the square area.

[0008] Preferably, the edge strip has a double-layer structure, and the two sides of each square area are stitched together.

[0009] Preferably, the width of the pressing strip is 2 to 5 centimeters.

[0010] Preferably, the two ends of the annular tightening band are fixed to the two sides of the corresponding segmented notch.

[0011] Preferably, the annular tightening band is made of elastic spandex material.

[0012] Preferably, when the filling tube is removed after filling, the tightening strap can automatically tighten. After the entire protective cover is filled, the entire edge strip is sewn together in one go using a sewing machine, and all gaps are sealed with anti-down leakage cotton thread.

[0013] Preferably, the stitching is done using a lockstitching process.

[0014] This utility model has at least the following beneficial effects:

[0015] To address the issue of down cross-contamination caused by the interconnected nature of traditional protective covers and the migration of down feathers during the movement of the filling tubes, this application divides the protective cover into independent 30cm square areas using horizontal and vertical stitches. Each area is independently sealed, physically blocking the flow channels of down feathers between areas and avoiding the risk of down cross-contamination during the filling process and subsequent use, thus ensuring the stability of the down filling amount in each area from the source.

[0016] Traditional down filling requires inserting the entire filling tube into the protective cover and moving it sequentially to each area. During this process, the already filled down is easily disturbed, leading to localized accumulation or sparseness. In this application, the filling tube only needs to be inserted individually through the notch in the corresponding area, without having to move across areas inside the protective cover. This avoids disturbing the down in the already filled areas, ensuring that the amount of down filling in each area is accurately controllable and significantly improving the uniformity of down filling.

[0017] In traditional open-loop structures, the unsealed areas form airflow channels with the outside during down filling, which can easily cause down to leak out due to pressure differences. In this application, each area is equipped with a ring-shaped tightening band, which can be tightened immediately after down filling to form a temporary seal. Combined with the permanent seal formed by the final overall stitching, this solves the problem of "down leakage while filling" in traditional down filling, reducing down loss while ensuring the accuracy of the down filling amount.

[0018] Traditional methods require precise control of the filling tube position within a connected space to correspond to different areas, which is cumbersome and prone to uneven filling due to positioning errors. In this application, the segmented notches of the elongated edge strip precisely correspond to the openings of each area, allowing the filling tube to be directly positioned and inserted into the target area through the external notch, eliminating the need for internal searching and movement, reducing reliance on operational expertise, adapting to automated mechanical filling, and significantly improving filling efficiency. Even if the traditional connected structure initially fills evenly, long-term use will cause the down to redistribute within the connected space due to tumbling and compression, resulting in localized uneven thickness. The independent area design of this application permanently confines the down in each area to a closed space, reducing down migration during use, ensuring long-term stable warmth retention performance, and extending the effective service life. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the edge pressing strip structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the tightening belt structure of this utility model.

[0023] In the diagram: 1. Protective cover; 11. Opening; 2. Seam; 3. Edge trim; 31. Notch; 32. Tightening strap. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] Reference Figure 1-3 A down comforter with uniform down filling includes a protective cover 1, characterized in that: the surface of the protective cover 1 is provided with crisscrossing horizontal and vertical stitches 2, which divide the protective cover 1 into multiple independent square areas with a side length of 30 cm; each square area has an opening 11 at the top center for the insertion of the down filling tube of the down filling machine; the top of the protective cover 1 is sewn with a long strip of edge trim 3, the overall length of the edge trim 3 is the same as the length of the protective cover 1 and is synchronously divided by the stitches 2 into segments corresponding to the square areas; the edge trim 3 has a notch 31 in the middle of each segment corresponding to the opening 11, and an annular tightening band 32 is provided at the notch 31. The tightening band 32 is in a tightened state under normal conditions, and the down filling tube can pass through the notch 31 and the tightening band 32 to extend into the interior of the square area during down filling.

[0027] The protective cover 1 is made of 80-count down-proof cotton fabric with a warp and weft density of 300T, ensuring that down cannot penetrate it; the stitches 2 are made of 402 high-strength polyester thread, sewn at a density of 8 stitches per 10 cm, and the intersection of the horizontal and vertical stitches 2 is reinforced with knots to ensure that the tensile strength of the edge of the divided square area is ≥50N; the opening 11 has a diameter of 3-4 cm, and the edge is bound to prevent fraying; the edge strip 3 is the same length as the long side of the protective cover 1, and the length of each segment after being divided by the stitches 2 matches the side length of the square area; the notch 31 is 2-3 cm long and is concentrically aligned with the opening 11, and the annular tightening band 32 tightens the notch 31 to a width of ≤0.5 cm in its natural state.

[0028] Furthermore, the edge strip 3 has a double-layer structure, and the two sides of each square area are stitched together.

[0029] The double-layer structure of the edge pressing strip 3 uses 60-count polyester fiber fabric of the same specification. After the edges of the two layers of fabric are aligned, double-line flat stitching is used to sew the left and right sides of the corresponding square area. The stitching penetrates the two layers of fabric and is fixed to the surface of the protective cover 1 to enhance the stiffness of the edge pressing strip 3.

[0030] Furthermore, the width of the pressing strip 3 is 2 to 5 centimeters.

[0031] The width of the edge strip 3 is preferably 3 cm. This width can ensure effective coverage of the opening 11 without causing the fabric to pile up due to excessive width.

[0032] Furthermore, the two ends of the annular tightening band 32 are fixed to the two sides of the corresponding segmented notch 31.

[0033] Furthermore, the annular tightening band 32 is made of elastic spandex material.

[0034] Furthermore, when the filling tube is removed after the filling is completed, the tightening band 32 can automatically tighten. After the entire protective cover 1 is filled with down, the entire edge strip 3 is sewn together in one go using a sewing machine, and all gaps 31 are sealed with anti-down-running cotton thread.

[0035] After the down filling tube is pulled out, the tightening band 32 springs back and shrinks, reducing the width of the gap 31 and temporarily preventing down from overflowing. Then, an industrial flat sewing machine (model GC6-1) is used to sew the edge strip 3 as a whole. The sewing line is located 0.8 cm away from the inner edge of the edge strip 3 and runs continuously along the length. After sewing, the gap 31 is completely covered. The sewing line, the double-layer structure of the edge strip 3, and the surface of the protective cover 1 form a three-dimensional fixation to ensure no down leakage.

[0036] Furthermore, the stitch 2 is made using a lockstitching process.

[0037] In summary, the protective cover 1 is divided into independent 30-centimeter square areas by the crisscrossing overlock stitches 2, achieving down partitioning and isolation; the long strip pressing strip 3 is the same length as the protective cover 1 and is segmented synchronously, and together with the elastic spandex tightening band 32 at the notch 31, a temporary sealing structure is formed that can be opened when filled with down and automatically closes after filling; finally, the permanent seal is completed by sewing the whole piece together with a sewing machine, forming a partitioned independent and double-sealed anti-down leakage system.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Images