KR200190621Y1 - Back plate of a knapsack - Google Patents

Abstract

The present invention relates to a back plate of a backpack that facilitates the manufacture of the backpack and does not burden the back even when wearing the backpack for a long time. The backpack back plate of the present invention is provided with two pieces of fabric and polyethylene foam molded into a single piece together with the fabric inserted therebetween, characterized in that it has a protruding portion in contact with the lumbar region of the human body. According to the present invention, it is possible to easily manufacture a backpack as well as to provide a backpack in accordance with the convenience of the wearer, and to implement a variety of designs can increase the sales power of the backpack.

Description

Backpack back plate {Back plate of a knapsack}

The present invention relates to a back plate of a backpack, and more particularly to a back plate of a backpack that facilitates the manufacture of the backpack and does not burden the back even when wearing the backpack for a long time.

Conventionally, the back plate of a conventional backpack is made by sealing the core material with a cushion between two layers of fabrics, and when wearing it in a state where an object is put in the backpack, the object in the backpack comes into contact with the back. It performs a function that prevents.

1 shows a back plate 100 of a backpack according to the prior art. Referring to FIG. 1, a core material (not shown) is included in two layers of the fabric 110, and the core material is sealed to prevent the core material from being oriented or deformed to one side within the fabric 110. . Therefore, a plurality of seam 120 is always present on the fabric 110 of the back plate (100).

FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 1. Referring to FIG. 2, it can be seen that the core material 130 is inserted into the two-ply fabric 110. Since the core member 130 should have a cushioning force, a polyurethane or polyethylene foaming agent, usually called a sponge, is used as the core member 130. Recently, ethylene vinyl acetate (EVA) resin, which is a modified polymer by copolymerization of vinyl acetate, is used as a blowing agent by using a feature of having flexibility and rubber elasticity, but this has a disadvantage of high weight and poor breathability. Have

Problems of the back plate of the backpack according to the prior art shown in Figures 1 and 2 are as follows. First, since the core material 130 must be sealed to fix the two-ply fabric 110 between the seam 130 and the sealing line is necessarily present on the surface of the fabric (110). Therefore, when the backpack is used for a long time, the sealing chamber of the back plate that is always in contact with the back of the human body is worn out, causing a problem of being partially broken. Second, since the core material 130 is fixed only in two layers of the fabric 110 and the seam line portion, there is a flutter between the core material 130 and the fabric 110 in other portions. In addition, when pressure is applied to the back plate for a long time according to the use of the backpack, the core member 130, which is a foaming agent, is compressed in the thickness direction, and the thickness thereof is reduced. In this case, the gap between the core material 130 and the fabric 110 becomes larger, causing wrinkles on the back plate of the backpack, thereby lowering the product value. Third, the back plate of the backpack needs to bend or protrude a portion of the structure to fit the back of the human body in order to improve the fit of the backpack. Therefore, the shape of the core material must also be modified accordingly. However, in the back plate of the backpack according to the prior art, if the core material has a curved or partially protruding shape, difficulties arise in the sealing process. Fourth, since the back plate of the conventional backpack has a flat structure, it is difficult to make a backpack having a variety of designs. In most cases, a flat pattern is put on the surface of the fabric.

Therefore, the technical problem of this invention is providing the back plate of the backpack which does not have the seam for fixing the core material of a back plate.

Another technical problem of the present invention is to provide a light backpack back plate without burdening the back even after wearing the backpack for a long time.

Another technical problem of the present invention is to provide a back plate of a backpack capable of meeting various design needs by having a three-dimensional structure.

1 is a plan view of a backpack back plate according to the prior art;

2 is a cross-sectional view taken along line AA ′ of FIG. 1;

3 is a plan view of a backpack back plate according to an embodiment of the present invention; And

4 is a cross-sectional view taken along line BB ′ of FIG. 3.

Explanation of symbols on the main parts of the drawings

100, 200... Backpack back plate 110, 210... fabric

120... Seam 130. Heartwood

230... Core material of polyethylene foam 240. projection part

250... Fabric junction

The backpack back plate of the present invention for solving the above technical problem is provided with two pieces of fabric and a polyethylene foam inserted therebetween and molded molded integrally with the fabric, the protruding portion in contact with the lumbar region of the human body Characterized in having a.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

3 is a plan view of a backpack back plate 200 according to an embodiment of the present invention. Referring to FIG. 3, the two-ply fabric 210 contains polyethylene foam (not shown) molded integrally therewith, and the protrusion 240 is marked in black. Therefore, the protrusion is formed in the part which contacts the lumbar part of a human body. In addition, unlike the prior art it can be seen that there is no seam. Thus, as in the prior art backpacks, the problem that the sealant is worn out and partially broken is fundamentally prevented.

4 is a cross-sectional view taken along line BB ′ of FIG. 3. Referring to FIG. 4, the core material 230 of polyethylene foam is inserted into two layers of the fabric 210, but the fabric 210 and the core material 230 of polyethylene foam are molded and integrally molded with each other. It can be seen that there is no gap in between. Therefore, as in the prior art backpacks, there is no problem of wrinkles in the back plate of the backpack. In addition, since the protrusion 240 is formed in the lumbar contact portion or the character shape portion of the human body, it is possible to provide a backpack having a variety of designs through the protrusion 240 without giving a burden even if worn for a long time. Polyethylene foam material used in the embodiment of the present invention has a good cushioning force, so that when forming a protrusion to conform to the shape, such as can give a comfortable feeling even if carrying a backpack for a long time. In addition, when molding the fabric 210 and the core 230 of the polyethylene foam, the sealing process is unnecessary, so the manufacture of a backpack is easy. In Fig. 4, reference numeral 250 denotes a junction of the fabric 210, and this portion is sealed to the backpack body, and the backpack back plate is attached to the backpack body.

As described above, when the backpack back plate of the present invention is applied to the backpack, not only the manufacture of the backpack is easy, but also the convenience of the wearer, and can implement a variety of designs can increase the sales power of the backpack .

Claims (1)

A back plate of a backpack having two pieces of fabric and a polyethylene foam inserted therebetween and molded together with the fabric and integrally molded and molded, and having protrusions at a portion contacting the lumbar region of the human body.