Bag strap

Abstract

To provide a bag strap to improve carrying comfort by preventing it from slipping off a user's body and enhancing the sensation of contact not only on the user's shoulder but also on body parts from the shoulder to the chest and from the chest to the side of the abdomen.SOLUTION: A core material 5 of a main belt 2 comprises: a shape-memory resin body 5a with a glass transition temperature of 20°C to a temperature equal to or less than body temperature; and a moderately soft elastic resin body 5b. The shape-memory resin body 5a is positioned on the side that comes into contact with the user's body.SELECTED DRAWING: Figure 4B

Description

[Technical field]

[0001] The present invention relates to a belt for bags such as daypacks, backpacks, and shoulder bags. [Background technology]

[0002] Conventionally, as an example of this type of bag belt, there is a backpack belt for a backpack bag as shown in Figures 7 and 8. This backpack belt for a backpack bag has a hard, band-shaped outer skin 12 with a notch 11 on the inside edge at a position facing the side of the neck, a lining cloth 13 of the same shape as the outer skin 12 superimposed on the back surface of the outer skin 12, and a flexible cushioning material 14 with elasticity is sandwiched between the outer skin 12 and the lining cloth 13, and is arranged so that a part of the cushioning material 14 is exposed at the notch 11 (Patent Document 1).

[0003] With this bag belt, even if the side of the user's neck comes into contact with the inside edge of the belt, the hard outer skin 12 does not come into contact with the user's neck, but the soft cushioning material 14 does, which is said to have the effect of solving the problem of the neck being rubbed and causing pain.

[0004] Another example of this type of bag belt is a backpack shoulder strap as shown in Fig. 9. This backpack shoulder strap has stretchable fabric 22 made of a material that is more stretchable than the outer fabric of the other parts, provided on both the front and back sides of shoulder strap 21 over a predetermined area from near upper joint 21a of shoulder strap 21, approximately half the width of the inside of shoulder strap 21 (Patent Document 2).

[0005] In this type of bag belt, the stretchable fabric 22 is provided on the inside near the upper joint 21a of the shoulder strap 21, which bears the greatest load, so that when the backpack is worn, only the stretchable fabric 22 side is pulled in accordance with the weight of the luggage, and the shoulder strap 21 stretches to the point where the load balance is even between the inside and outside of the shoulder strap 21. As a result, the slack on the outside of the shoulder strap 21 is eliminated, the load is evenly distributed on the inside and outside, and the entire shoulder strap 21 comes into even contact with the shoulder. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Utility Model Application Publication No. 4-120620 [Patent Document 2] Patent No. 6445744 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the bag belt described in Patent Document 1 only solves the problem of the side of the user's neck being rubbed and causing pain, but does not improve the feeling of contact on the user's shoulder, or the area from the shoulder to the chest, or from the chest to the side.

[0008] Furthermore, in the bag belt, when the elastic and soft cushioning material 14 is sandwiched between the outer skin 12 and the lining 13, this cushioning material 14 is in a state of tension at the cutout portion 11, and comes into contact with the side of the neck or shoulder of the user under this tension, which can be said to actually worsen the feeling of contact with the user's shoulder.

[0009] Furthermore, in the bag belt described in Patent Document 2, shoulder strap 21 is in even contact with the shoulder as a whole, which can be said to solve the problem of improving the contact feeling on the user's shoulder. However, since stretchable fabric 22 is only provided near upper joint 21a of shoulder strap 21, the problem of improving the contact feeling on the area from the user's shoulder to the chest and from the chest to the side is not solved.

[0010] Furthermore, in the above-mentioned bag belt, the elastic fabric 22 is provided on both the front and back sides of the shoulder strap 21, approximately half the width of the inside of the shoulder strap 21, and the core material of the shoulder strap 21 is a hard core material having elasticity, so that this core material indirectly contacts the shoulder, and the problem of improving the contact feeling on the user's shoulder is not completely solved.

[0011] Therefore, the present invention has been made to solve the conventional problems, and aims to provide a bag belt that does not slip off the user's body, improves the contact feeling not only on the user's shoulders, but also on the area from the shoulders to the chest and from the chest to the sides, and improves the comfort of carrying the bag on the back. [Means for solving the problem]

[0012] The bag belt of the present invention has a core material 5 of a main belt 2 that is composed of a shape-memory resin body 5a having a glass transition point of 20°C to body temperature and a medium-soft elastic resin body 5b, and the shape-memory resin body 5a is disposed on the side that comes into contact with the user's body.

[0013] In addition, in the bag belt of the present invention, the core material 5 of the main belt 2 is composed of a shape memory resin body 5a having a glass transition point of 20°C to a temperature below body temperature, a medium soft elastic resin body 5b, and a high soft elastic resin body 5c on the inner side of the user's body and a low soft elastic resin body 5d on the outer side of the user's body, and these are bonded together adjacent to each other to form high and low soft elastic resin bodies 5c and 5d, with the shape memory resin body 5a being arranged on the side that comes into contact with the user's body, and the medium soft elastic resin body 5b and the high and low soft elastic resin bodies 5c and 5d being arranged in this order on the side of the shape memory resin body 5a that does not come into contact with the user's body.

[0014] Furthermore, in the bag belt of the present invention, the core material 5 of the main belt 2 is composed of a shape memory resin body 5a having a glass transition point of 20°C to a temperature below body temperature, a medium soft elastic resin body 5b, a high soft elastic resin body 5c on the inner side of the user's body and a low soft elastic resin body 5d on the outer side of the user's body, and these are bonded adjacent to each other to form high and low soft elastic resin bodies 5c and 5d and a medium soft elastic resin body 5b, the shape memory resin body 5a being arranged on the side that comes into contact with the user's body, and on the side of the shape memory resin body 5a that does not come into contact with the user's body, the medium soft elastic resin body 5b, the high soft and low soft elastic resin bodies 5c and 5d, and the medium soft elastic resin body 5b are arranged in this order. Effect of the Invention

[0015] The bag belt of the present invention is made by disposing a shape-memory resin having a glass transition point of 20°C to body temperature on the side that comes into contact with the user's body, so that the shape of the bag belt changes in response to the user's body temperature and fits snugly to the user's body.

[0016] Furthermore, in the bag belt of the present invention, the highly soft elastic resin body is disposed on the inner side where it comes into contact with the body of the user, so that the contact with the body of the user is weakened.

[0017] As a result, the bag belt of the present invention does not slip off the user's body, and provides an excellent contact feeling not only on the user's shoulders, but also on the area from the shoulders to the chest and from the chest to the sides, thereby further improving the comfort of carrying the bag. [Brief description of the drawings]

[0018] [Figure 1] FIG. 2 is a rear view of a daypack equipped with the bag belt of the present invention. [Diagram 2] FIG. 2 is a surface view of the bag belt of the present invention. [Diagram 3] FIG. 2 is a back view of the bag belt of the present invention. [Figure 4A] FIG. 3 is an enlarged cross-sectional view of a first embodiment of the bag belt of the present invention taken along line A-A in FIG. 2. [Figure 4B] FIG. 4B is an enlarged cross-sectional view of only the core material of the bag belt shown in FIG. 4A. [Figure 5A] FIG. 3 is an enlarged cross-sectional view of a second embodiment of the bag belt of the present invention taken along line A-A in FIG. 2. [Figure 5B] FIG. 5B is an enlarged cross-sectional view of only the core material of the bag belt shown in FIG. 5A. [Figure 6A] FIG. 3 is an enlarged cross-sectional view of a third embodiment of the bag belt of the present invention taken along line A-A in FIG. 2. [Figure 6B] FIG. 6B is an enlarged cross-sectional view of only the core material of the bag belt shown in FIG. 6A. [Figure 7] FIG. 1 is a surface view showing an example of a conventional bag belt. [Figure 8]FIG. 8 is an exploded view of the conventional bag belt shown in FIG. [Figure 9] FIG. 11 is a rear view of a backpack equipped with another example of a conventional bag belt. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a bag belt according to the present invention will be described in detail with reference to the drawings.

[0020] The bag belt of the present invention is attached to a backpack bag 1 such as a daypack as a pair on the left and right sides, as shown in Fig. 1. That is, this bag belt is composed of a main belt 2 and an auxiliary belt 3, and the upper end of one of the main belts 2 is fixed to the upper left side of the back surface 1a of the backpack bag 1 by sewing or the like, and the upper end of the other main belt 2 is fixed to the upper right side of the back surface 1a of the backpack bag 1 by sewing or the like, and the lower end of one of the main belts 2 is fixed to the auxiliary belt 3 by sewing or the like on the lower left side of the back surface 1a of the backpack bag 1, and the lower end of the other main belt 2 is fixed to the auxiliary belt 3 by sewing or the like on the lower right side of the back surface 1a of the backpack bag 1 by sewing or the like, and the belts are attached to each of the auxiliary belts 3 by interposing a buckle 4 therebetween so that the overall length can be adjusted.

[0021] The bag belt may consist only of the main belt 2. In this case, the main belts 2 are fixed by, for example, sewing the upper end of one main belt 2 to the upper left side of the back surface 1a of the backpack bag 1 and the upper end of the other main belt 2 to the upper right side of the back surface 1a of the backpack bag 1, and the lower end of one main belt 2 to the lower left side of the back surface 1a of the backpack bag 1 and the lower end of the other main belt 2 to the lower right side of the back surface 1a of the backpack bag 1, respectively, by using a buckle 4 between them so that the length can be adjusted.

[0022] As shown in Figures 2 and 3, the main belt 2 is gradually tapered from the top to the bottom, and the entire core material 5 in a belt shape that curves outward from the top to the bottom is covered with a cover material 6 made of fabric.

[0023] As shown in Figures 4A and 4B, the core material 5 in the first embodiment is composed of a shape-memory resin body 5a and a medium-soft elastic resin body 5b. The shape-memory resin body 5a is disposed on the side that contacts the user's body. The shape-memory resin body 5a and the medium-soft elastic resin body 5b are bonded or sewn together.

[0024] As shown in Figs. 5A and 5B, the core material 5 in the second embodiment is composed of a shape memory resin body 5a, a medium soft elastic resin body 5b, a high soft elastic resin body 5c on the inner side of the user's body (preferably approximately half of the inner side), and a low soft elastic resin body 5d on the outer side of the user's body (preferably approximately half of the outer side), and is composed of high soft and low soft elastic resin bodies 5c and 5d bonded adjacent to each other. The shape memory resin body 5a is arranged on the side that contacts the user's body, and the medium soft elastic resin body 5b and the high soft and low soft elastic resin bodies 5c and 5d are arranged in this order on the side of the shape memory resin body 5a that does not contact the user's body. The shape memory resin body 5a and the medium soft elastic resin body 5b, and the medium soft elastic resin body 5b and the high soft and low soft elastic resin bodies 5c and 5d are bonded or sewn together.

[0025] 6A and 6B, the core material 5 of the third embodiment is composed of a shape memory resin body 5a, a medium soft elastic resin body 5b, a high soft elastic resin body 5c on the inner side of the user's body (preferably approximately half of the inner side), and a low soft elastic resin body 5d on the outer side of the user's body (preferably approximately half of the outer side), and is bonded adjacent to each other to form high and low soft elastic resin bodies 5c and 5d and a medium soft elastic resin body 5b. The shape memory resin body 5a is arranged on the side that contacts the user's body, and the medium soft elastic resin body 5b, the high and low soft elastic resin bodies 5c and 5d, and the medium soft elastic resin body 5b are arranged in this order on the side of the shape memory resin body 5a that does not contact the user's body. The shape-memory resin body 5a and the medium soft elastic resin body 5b, and the medium soft elastic resin body 5b and the high soft and low soft elastic resin bodies 5c and 5d are bonded or sewn together.

[0026] The shape-memory resin body 5a has a glass transition point of 20° C. to body temperature, preferably 23° C. to 28° C. By setting the glass transition point of the shape-memory resin body 5a at such a temperature, when the main belt 2 comes into contact with the body of the user, the shape of the body changes depending on the body temperature of the user. An example of such a shape-memory resin body 5a is "HUMOFIT" (a registered trademark of Mitsui Chemicals, Inc.), but is not limited thereto as long as the glass transition point is within the above temperature range.

[0027] The hardness of the medium soft elastic resin body 5b is preferably set to 18 to 22 degrees in JIS-C hardness, the hardness of the high soft elastic resin body 5c is preferably set to 10 to 13 degrees in JIS-C hardness, and the hardness of the low soft elastic resin body 5d is preferably set to 36 to 40 degrees in JIS-C hardness. When the medium soft elastic resin body 5b, the high soft elastic resin body 5c, and the low soft elastic resin body 5d are set to these hardnesses, when the main belt 2 comes into contact with the user's shoulder to chest or chest to side, it becomes easier to bend in the width direction and length direction of the shoulder, chest, and side, and to easily conform to these parts.

[0028] In the illustrated embodiment, the shape memory resin body 5a has a length of 45 to 65 cm, a thickness Ta of 0.5 to 1 mm, a width Wa of 5 to 7 cm at the upper portion, and a width Wb of 3 to 5 cm at the lower portion.

[0029] In the illustrated example, the medium-soft elastic resin body 5b has a length of 45 to 65 cm, a thickness Tb of 3 to 4 mm, a width Wa of 5 to 7 cm at the upper part, and a width Wb of 3 to 5 cm at the lower part.

[0030] In the illustrated example, the highly soft elastic resin body 5c has a length of 40 to 60 cm so that it is slightly shorter at the upper and lower ends of the medium soft elastic resin body 5b, a thickness Tc of 6 to 8 mm, a width Wc of 2.5 to 3.5 cm at the upper part, and a width of 1.5 to 2.5 cm at the lower part.

[0031] In the illustrated example, the low-soft elastic resin body 5d has a length of 40 to 60 cm so that it is slightly shorter at the upper and lower ends of the medium-soft elastic resin body 5b, a thickness Tc of 6 to 8 mm, a width Wd of 2.5 to 3.5 cm at the upper part, and a width of 1.5 to 2.5 cm at the lower part.

[0032] In addition, as shown in Figs. 5A and 5B, an elastic resin body 5e such as nylon can be interposed between the medium soft elastic resin body 5b and the high soft and low soft elastic resin bodies 5c and 5d without bonding them together. By interposing this elastic resin body 5e, when the core material 5 is bent along the user's body, the adhesion between the high soft elastic resin body 5c and the low soft elastic resin body 5d is made difficult to peel off. Although not shown in Figs. 6A and 6B, the elastic resin body 5e can be interposed between the medium soft elastic resin body 5b and the high soft and low soft elastic resin bodies 5c and 5d in this embodiment as well.

[0033] In the illustrated example, the elastic resin body 5e has a length of 40 to 60 cm so that it is slightly shorter at the upper and lower ends of the medium-soft elastic resin body 5b, a thickness Td of 0.5 to 1 mm, a width Wa at the upper part of 5 to 7 cm, and a width Wb at the lower part of 3 to 5 cm.

[0034] The dimensions of the shape memory resin body 5a, the medium soft elastic resin body 5b, the high soft elastic resin body 5c, the low soft elastic resin body 5d, and the stretchable resin body 5e are standard dimensions for an adult user, and are not limited to these dimensions.

[0035] The cover material 6 is made of fabric such as natural fibers (e.g., cotton, hemp), synthetic fibers (e.g., polyester, nylon), semi-synthetic fibers (e.g., acetate), and regenerated fibers (e.g., rayon), and is formed into an elongated bag shape. The core material 5 is inserted from the upper end opening of the bag, and the upper end is sewn to the upper part of the back surface 1a of the backpack 1 to close the upper end opening, thereby covering the entire core material 5. The back surface 6a (the surface that contacts the user) of the cover material 6 is made of mesh fabric to improve breathability, and the front surface 6b (the surface that does not contact the user) is made of waterproof fabric to prevent rain from seeping in even if it gets wet. The back surface 6a of the cover material 6 and the shape memory resin body 5a are preferably heated and pressed together using a film-like hot melt adhesive. An example of such a film-like hot melt adhesive is "Elfan" (a registered trademark of Nihon Matai Co., Ltd.). In this manner, the back surface 6a of the cover material 6 and the shape-memory resin body 5a are uniformly bonded, and the body heat of the user is uniformly transferred to the shape-memory resin body 5a.

[0036] In addition, the auxiliary belt 3 is formed in a long, narrow belt shape made entirely of fabric such as natural fibers, synthetic fibers, semi-synthetic fibers, or regenerated fibers, and is used to adjust the overall length of the bag belt, but is not necessary when the main belt 2 itself is long.

[0037] Furthermore, the buckle 4 is made of synthetic resin or metal, and the one shown in the figure is attached between the lower end of the main belt 2 and the upper end of the auxiliary belt 3, and the auxiliary belt 3 can be folded back to adjust the overall length of the bag belt.

[0038] Since the bag belt of the present invention is constructed as described above, when the bag to which this bag belt is attached is worn on the back, main belt 2 comes into contact with the area from the user's shoulder to the chest and from the chest to the side.

[0039] The core material 5 of the main belt 2 is made of a shape-memory resin body 5a with a glass transition point of 20°C to body temperature, which is arranged on the side that comes into contact with the user's body. Therefore, the shape of the body changes with the user's body temperature to fit snugly to the user's body and will not slip off the user's body.

[0040] Furthermore, since the core material 5 of the main belt 2 has the highly soft elastic resin body 5c positioned on the inside where it comes into contact with the user's body, the contact with the user's body is weaker, which improves the contact feeling not only on the user's shoulders but also on the area from the shoulders to the chest and from the chest to the sides, thereby further improving the comfort of carrying the bag. [Explanation of symbols]

[0041] 2 Main Belt 5 Core material 5a Shape memory resin body 5b Medium soft elastic resin body 5c Highly soft elastic resin body 5d Low-soft elastic resin body

Claims

1. The core material of the main belt is A shape-memory resin body having a glass transition point of 20°C to body temperature; It is composed of a medium soft elastic resin body, A bag belt, characterized in that the shape-memory resin body is disposed on a side that comes into contact with the body of a user.

2. The core material of the main belt is A shape-memory resin body having a glass transition point of 20°C to body temperature; A medium soft elastic resin body; The inner side of the user's body is made of a high-soft elastic resin body, and the outer side of the user's body is made of a low-soft elastic resin body, which are bonded adjacent to each other to form a high-soft elastic resin body and a low-soft elastic resin body. The bag belt is characterized in that the shape-memory resin body is arranged on the side that comes into contact with the user's body, and the medium soft elastic resin body and the high softness and low softness elastic resin bodies are arranged in this order on the side of the shape-memory resin body that does not come into contact with the user's body.

3. The core material of the main belt is A shape-memory resin body having a glass transition point of 20°C to body temperature; A medium soft elastic resin body; A high-soft elastic resin body is formed on the inner side of the user's body and a low-soft elastic resin body is formed on the outer side of the user's body, and these are bonded adjacent to each other. It is composed of a medium soft elastic resin body, The shape-memory resin body is disposed on the side that comes into contact with the user's body, and the medium-soft elastic resin body, the high-soft and low-soft elastic resin bodies, and the medium-soft elastic resin body are disposed in this order on the side of the shape-memory resin body that does not come into contact with the user's body.

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