JP7141539B2 - Backpack shoulder belt and backpack - Google Patents

Description

The present invention relates to shoulder belts and the like used for backpacks.

Backpacks usually have a bag-like bag body having a storage space for storing articles, and a pair of left and right shoulder belts attached to the bag body for carrying the bag body on the back.
In general, a shoulder belt is composed of a shoulder part that touches the user's shoulder (hereinafter sometimes simply referred to as "shoulder part") and a user's chest (hereinafter simply referred to as "chest part") when carrying a backpack. ), and a connecting portion interposed between the chest corresponding portion and the main body of the bag.
For example, in Patent Document 1, in a cross section cut in a direction perpendicular to the longitudinal direction, the shoulder corresponding portion and the chest corresponding portion are composed of three portions, both end portions and a central portion, and substantially cylindrical pad materials are provided at both end portions. Disclosed is a shoulder belt for a bag that is arranged and has at least a strip of tape in the center.
Non-Patent Document 1 discloses a rucksack manufactured by SALEWA (trade name “APEX CLIMB 25 BP”, etc.). The pair of shoulder belts of this bag is composed of two belts in a shoulder-corresponding part and a chest-corresponding part, and the two belts are connected in a bridge manner at a plurality of points.

Japanese Patent No. 4023954

Retrieved on August 10, 2019, Internet URL: http://salewa. jp/equipment/

Since both ends of the shoulder belt of Patent Document 1 are connected at the central portion, it is difficult for the portion corresponding to the shoulder to follow the shape of the shoulder portion. Therefore, when the user carrying the backpack of Patent Document 1 walks while swinging his or her arms, the shoulder-corresponding portion of the shoulder belt shifts from the shoulder, or a local load is applied to the shoulder.
In the shoulder belt of Non-Patent Document 1, a shoulder-corresponding part and a chest-corresponding part are composed of two belts connected at a plurality of points. The shoulder belt of the backpack in Non-Patent Document 1 is relatively lightweight. However, since the shoulder belt consists of two belts connected together, it functions substantially in the same way as a single belt, and the feeling of use when carried on the back is not good and there is room for improvement. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a shoulder belt for a backpack and a backpack that can prevent shoulder-corresponding parts from slipping off from the shoulders and prevent local loads from being applied to the shoulders.

In order to achieve the above object, the first shoulder belt of the present invention is a shoulder belt for carrying a bag, which is attached to the main body of the bag and has an elongated shape in which a shoulder corresponding portion and a chest corresponding portion are connected to each other. wherein the shoulder-corresponding portion has an inner band-shaped portion and an outer band-shaped portion which are laterally aligned with a longitudinally extending longitudinal gap therebetween , and the length of the outer band-shaped portion in the longitudinal direction is the inner band-shaped portion. smaller than the longitudinal length of the part .
A second shoulder belt of the present invention is a shoulder belt for carrying a bag, which is attached to the main body of the bag and has a long shape in which a shoulder-corresponding part and a chest-corresponding part are connected to each other. The corresponding portion has an inner band-shaped portion and an outer band-shaped portion that are arranged in the transverse direction with an elongated gap extending in the longitudinal direction, and the bending rigidity in the longitudinal direction of the outer band-shaped portion is the same as that in the longitudinal direction of the inner band-shaped portion. greater than the bending stiffness at

According to another aspect of the invention, a backpack is provided.
This backpack has any one of the shoulder belts described above and a bag body, the end of the shoulder-corresponding portion of the shoulder belt being attached to the upper part of the bag body, and the shoulder belt being attached to the chest. The end of the corresponding portion is attached to the lower portion of the bag body.

The shoulder belt for a backpack according to the present invention is less likely to shift from the user's shoulders, and can prevent localized loads from being applied to the shoulders. The backpack in which the shoulder belt of the present invention is incorporated can give the user a good feeling of use.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the backpack which concerns on 1st Embodiment of this invention. The left side view of the backpack. The front view of the same backpack. The front view showing the state when the user carries the backpack. The front view of the shoulder belt of 1st Embodiment. FIG. 4 is an enlarged front view of a portion corresponding to the shoulder of the shoulder belt. FIG. 7 is an end view cut along line VII-VII of FIG. 6; Sectional drawing cut|disconnected by the VIII-VIII line of FIG. FIG. 11 is a partially enlarged perspective view showing an enlarged portion near the shoulder when the user carries the backpack. FIG. 10 is a reference cross-sectional view taken along line XX of FIG. 9; The front view of the shoulder belt which concerns on 2nd Embodiment. The front view of the backpack which concerns on 2nd Embodiment.

Hereinafter, the present invention will be described with reference to the drawings.
In this specification, the numerical range represented by "lower limit XXX to upper limit YYY" means from lower limit XXX to upper limit YYY. When a plurality of numerical ranges are described separately, an arbitrary lower limit value and an arbitrary upper limit value can be selected, and "an arbitrary lower limit value to an arbitrary upper limit value" can be set.

[First embodiment]
<Overview of backpack>
1 is a perspective view of the backpack A of the first embodiment, FIG. 2 is a left side view of the backpack A, and FIG. 3 is a front view of the backpack A. As shown in FIG. FIG. 4 is a front view showing, for reference, the state when the user carries the backpack A on his or her back.

1 to 3, a backpack A of the present invention has a bag body 9 having a storage space for storing articles, and a pair of left and right shoulder belts 1, 1 attached to the bag body 9. .
The backpack A of the present invention is used as a rucksack, a school bag such as a school bag, a business bag, and the like.
The bag main body 9 is formed in a bag-like shape so that articles can be accommodated therein. The bag main body 9 is formed in the above-described bag shape from a conventionally known base material such as cloth, synthetic resin sheet, leather, synthetic leather, or the like. A specific shape of the bag main body 9 is not particularly limited, and can be appropriately designed according to the conventional art.
In the illustrated example, the backpack A is a rucksack that can be used in daily life.

The ends of the shoulder-corresponding parts 2 of the shoulder belts 1, 1 are attached to the upper part of the bag body 9, respectively, and the ends of the chest-corresponding parts 3 of the shoulder belts 1, 1 are attached to the lower part of the bag body 9, respectively. It is The end portion of the chest-corresponding portion 3 may be directly attached to the lower portion of the bag body 9, but normally, the chest-corresponding portion 3 of the shoulder belts 1, 1 is provided with the connecting portion 4, and the connecting portion 4 is connected to the shoulder belt 1, 1. The end of the chest corresponding part 3 is attached to the bag body 9 via 4 .

<Shoulder belt for carrying bag>
The shoulder belt 1 for a backpack of the present invention is attached to the bag body 9 as described above and used.
Typically, a pair of left and right shoulder belts 1, 1 are attached to the backpack body 9 of the bag. A harness member 11 that spans between the pair of left and right shoulder belts 1, 1 may be provided as necessary.
The pair of left and right shoulder belts 1, 1 may be left-right asymmetrical, but are usually left-right symmetrical as shown in FIG.
Since the pair of shoulder belts 1 are bilaterally symmetrical, the configuration of one shoulder belt 1 (on the left side of the drawing) will be described in detail below. The structure of the other shoulder belt 1 can be interpreted by reversing the description of the structure of the one shoulder belt 1 left and right.

The overall shape of the shoulder belt 1 is long enough in one direction. In this specification, the one direction (the direction in which the long shoulder belt 1 extends) is called the "longitudinal direction", and the direction substantially orthogonal to the longitudinal direction is called the "lateral direction".
The shoulder belt 1 is flexible as a whole and arbitrarily deformed when a force is applied.
The shoulder belt 1 has a shoulder-corresponding portion 2 and a chest-corresponding portion 3, and further has a connecting portion 4 as necessary.
As shown in FIG. 4, the shoulder corresponding part 2 is a part that contacts the shoulder of the user when carrying the backpack A, and the chest corresponding part 3 contacts the chest of the user when carrying the backpack A. Say the part. Also, the connection part 4 is a part for attaching the chest-corresponding part 3 of the shoulder belt 1 to the bag body 9 .

5 is a front view of a pair of shoulder belts 1, FIG. 6 is an enlarged front view of the shoulder-corresponding portion 2 of the shoulder belt 1 on the left side of the page, and FIG. FIG. 8 is an end view of the corresponding portion 2 cut along the lateral direction, and FIG. 8 is a cross-sectional view of the outer belt-like portion of the shoulder corresponding portion 2 cut along the longitudinal direction. Note that the end view is a cross-sectional view showing only the shape of the cut surface and not showing the shape on the far side from the cut surface.

1 to 6, a shoulder belt 1 has a shoulder corresponding portion 2, a chest corresponding portion 3 and a connecting portion 4 in order from top to bottom. An end portion 2 a (upper end portion) of the shoulder corresponding portion 2 can be attached to the bag body 9 . The end portion 2a of the shoulder corresponding portion 2 is formed thin so that it can be easily attached to the upper portion of the bag body 9 by sewing or other means (see FIG. 8).
The shoulder corresponding portion 2 is divided into at least two belt-like portions 6 and 7 from the end portion 2a. In other words, the shoulder corresponding portion 2 is composed of at least two band-shaped portions 6 and 7, and these band-shaped portions 6 and 7 are assembled at the end portion 2a that can be attached to the bag body 9. As shown in FIG.

At least two band-shaped portions 6 and 7 forming the shoulder corresponding portion 2 are assembled at the chest corresponding portion 3 .
The connecting part 4 is in the form of a belt. The upper end portion of the connecting portion 4 is attached to the end portion 3a of the chest corresponding portion 3 . A lower end portion 4 a of the connecting portion 4 is an end portion for attaching to the bag body 9 . The connecting part 4 is provided with a buckle 41 so that its longitudinal length can be changed.

A shoulder-corresponding portion 2 and a chest-corresponding portion 3 of the shoulder belt 1 are continuous and substantially band-shaped. That is, from the shoulder corresponding portion 2 to the chest corresponding portion 3, it is formed in a substantially band shape with a relatively large thickness. In addition, the strip|belt shape means elongate substantially rectangular shape extended in a front view in a longitudinal direction.
The shoulder belt 1 may be substantially straight from the shoulder portion 2 to the chest portion 3, but in the example shown in FIG. . Therefore, the shoulder belt 1 as a whole is formed in a substantially curved belt shape slightly curved outward toward the bottom. With such a shape, as shown in FIG. 4, when the backpack A is carried, the chest-corresponding portion 3 of the shoulder belt 1 follows the chest and armpits of the user.

Here, in the present specification, "substantially" means to include the allowable range in the technical field to which the present invention belongs. The shoulder belt 1, which is generally made of a flexible material, often does not have a precise shape like a precision instrument. Therefore, it should be noted that the shape, positional relationship, directionality, dimensions, and definitional description of each part of the shoulder belt 1 described in this specification should not be interpreted in a strict sense.

The longitudinal length of the shoulder corresponding portion 2 and the longitudinal length of the chest corresponding portion 3 can be set appropriately. Since the fit to the shoulder of the user is improved, the longitudinal length of the shoulder corresponding portion 2 is 0.25 to 0.25 times the combined longitudinal length of the shoulder corresponding portion 2 and the chest corresponding portion 3 . It is preferably 8 times, and more preferably 0.4 to 0.6 times the combined longitudinal length.
The length of the shoulder portion 2 in the longitudinal direction is the linear length from the end 2a of the shoulder portion 2 (the end attached to the upper portion of the bag body 9) to the boundary between the shoulder portion 2 and the chest portion 3. , and the length in the longitudinal direction of the chest-corresponding portion 3 is the linear length from the boundary between the shoulder-corresponding portion 2 and the chest-corresponding portion 3 to the end portion 3 a of the chest-corresponding portion 3 .

The at least two belt-like portions 6 and 7 forming the shoulder corresponding portion 2 are arranged side by side in the lateral direction with a long gap 8 interposed therebetween, and are independent of each other.
Specifically, the shoulder corresponding portion 2 is composed of a plurality of band-like portions 6 and 7 that are arranged side by side in the lateral direction and are independent of each other. In the illustrated example, the shoulder corresponding portion 2 is composed of an inner band-shaped portion 6 (inner band-shaped portion 6) and an outer band-shaped portion 7 (outer band-shaped portion 7).
The inner strip portion 6 and the outer strip portion 7 extending in the longitudinal direction are arranged side by side in the lateral direction with a long gap 8 extending in the longitudinal direction interposed therebetween. In other words, the inner strip 6 and the outer strip 7 are completely separated and independent of each other by the elongated gap 8 therebetween.

From another point of view, as shown in FIG. 6, the inner band-shaped portion 6 has a first edge 6-1 (hereinafter referred to as the inner first edge 6-1) and a second edge 6-2 (hereinafter referred to as the inner first edge 6-1) facing each other in the transverse direction. hereinafter referred to as inner second edge 6-2). The outer band-shaped portion 7 has a first edge 7-1 (hereinafter referred to as first outer edge 7-1) and a second edge 7-2 (hereinafter referred to as second outer edge 7-2) facing each other in the lateral direction. defined. The long gap 8 is defined by the inner first edge 6-1, the outer first edge 7-1, the upper end 7-1t of the outer first edge 7-1, and the upper end of the inner first edge 6-1. Upper edge t continuous between 6-1t and lower edge b continuous between lower edge 7-1b of outer first edge 7-1 and lower edge 6-1b of inner first edge 6-1 and the space enclosed by
Between the upper edge t and the lower edge b there is no member bridging the edges t and b. Similarly, between the first inner edge 6-1 and the first outer edge 7-1, there is no member bridging and connecting the edges 6-1, 7-1. Thus, the inner strip 6 and the outer strip 7 can move independently.

The inner first edge 6-1 and the inner second edge 6-2 extend substantially parallel to the longitudinal direction, and the outer first edge 7-1 and the outer second edge 7-2 also extend substantially parallel to the longitudinal direction. has been extended to The upper edge t is inclined upward from the upper edge 7-1t of the outer first edge 7-1 toward the upper edge 6-1t of the inner first edge 6-1. The lower edge b is inclined downward from the lower edge 7-1b of the outer first edge 7-1 toward the lower edge 6-1b of the inner first edge 6-1.

The outer first edge 7-1 and the upper edge t may be substantially angular and continuous, or may be continuous with a gentle curve as shown in a front view such as FIG. Similarly, the outer first edge 7-1 and the lower edge b may be substantially angular and continuous, or may be continuous with a gentle curve as shown in a front view such as FIG. . The boundary between the outer first edge 7-1 and the upper edge t, which is curved and continuous as described above (this boundary conceptually corresponds to the upper end 7-1t of the outer first edge 7-1) And the boundary between the outer first edge 7-1 and the lower edge b (this boundary conceptually corresponds to the lower end 7-1b of the outer first edge 7-1) does not appear clearly. In the book, the approximate midpoints of the curves shall be regarded as the boundaries of each.
The inner first edge 6-1 and the upper edge t may be substantially angular and continuous as shown in a front view such as FIG. 6, or may be continuous while drawing a gentle curve. Similarly, the inner first edge 6-1 and the lower edge b may be substantially angular and continuous as shown in the front view of FIG. 6, or may be continuous with a gentle curve. . The boundary between the substantially angular and continuous inner first edge 6-1 and the upper edge t (this boundary conceptually corresponds to the upper end 6-1t of the inner first edge 6-1) and the inner first edge 6-1 The boundary between the edge 6-1 and the lower edge b (this boundary conceptually corresponds to the lower end 6-1b of the inner first edge 6-1) is each corner.

The upper edge t is inclined upward from the outer first edge 7-1 to the inner first edge 6-1, and/or the lower edge b is inclined from the outer first edge 7-1 to the inner first edge. Being slanted downwards towards 6-1, the longitudinal length of the outer first edge 7-1 is smaller than the longitudinal length of the inner first edge 6-1. The length of the outer first edge 7-1 in the longitudinal direction is the linear length from the upper end 7-1t to the lower end 7-1b of the outer first edge 7-1. 1 refers to the linear length from the upper end 6-1t to the lower end 6-1b of the inner first edge 6-1. The outer strip 7 is defined by an outer first edge 7-1 and an outer second edge 7-2, and the inner strip 6 is defined by an inner first edge 6-1 and an inner second edge 6-2. Therefore, the longitudinal length of the outer strip portion 7 is smaller than the longitudinal length of the inner strip portion 6 .
By forming the length of the outer band-shaped portion 7 to be smaller than the length of the inner band-shaped portion 6 (in other words, by forming the length of the inner band-shaped portion 6 to be greater than the length of the outer band-shaped portion 7), When the backpack A is carried, the inner strip 6 and the outer strip 7 of the shoulder belt 1 are curved along the shoulder of the user, and the inner strip 6 and the outer strip 7 are less likely to shift from the shoulder. .

The longitudinal length of the outer strip portion 7 (corresponding to the longitudinal length of the outer first edge 7-1) and the longitudinal length of the inner strip portion 6 (corresponding to the longitudinal length of the inner first edge 6-1) ) are set as appropriate. If the length is too small, the outer strip 7 and the inner strip 6 will be difficult to move independently of each other (movement of one strip will be easily followed by the other strip), and the length will be too large. Then, the movement of the outer band-shaped portion 7 cannot be restricted by the inner band-shaped portion 6, and the outer band-shaped portion 7 may fall off the user's shoulder. From this point of view, the longitudinal length of the outer strip portion 7 and the longitudinal length of the inner strip portion 6 are each independently, for example, 100 mm to 400 mm, preferably 150 mm to 350 mm. Such a length range can prevent the outer band-shaped portion 7 from excessively moving when the user carrying the backpack A walks.
In addition, when the outer band-shaped portion 7 is smaller than the inner band-shaped portion 6, the difference between the lengths of the inner band-shaped portion 6 and the outer band-shaped portion 7 (this difference = the length of the inner band-shaped portion 6 in the longitudinal direction - the outer band-shaped portion 7 length in the longitudinal direction) is, for example, 5 mm to 50 mm, preferably 10 mm to 30 mm.

In addition, the widthwise length of the outer band-shaped portion 7 (equivalent to the distance in the widthwise direction between the first outer edge 7-1 and the second outer edge 7-2) and the widthwise length of the inner belt-shaped portion 6 (inner The distance between the first edge 6-1 and the inner second edge 6-2) may be the same, or one of them may be larger than the other. For example, the lateral length at the longitudinal midpoint of the outer strip portion 7 and the lateral length at the longitudinal midpoint of the inner strip portion 6 are substantially the same. Furthermore, it is preferable that the lateral length of the outer strip portion 7 and the lateral length of the inner strip portion 6 are substantially the same even in the intermediate region including the longitudinal intermediate point. In this preferred example, the lateral lengths of the outer strip portion 7 and the inner strip portion 6 are substantially the same over substantially the entire longitudinal direction. In this case, the outer first edge 7-1 and the inner first edge 6-1 extend substantially parallel to the longitudinal direction.
Since the lateral lengths of the outer belt-shaped part 7 and the inner belt-shaped part 6 are substantially the same, when the backpack A is carried on the back, the outer belt-shaped part 7 and the inner belt-shaped part 6 are easily deformed in the same manner. .

Further, the widthwise length of the long gap 8 (equivalent to the widthwise distance between the inner first edge 6-1 and the outer first edge 7-1), the widthwise length of the outer strip portion 7 and the inner The length of the strip-shaped portion 6 in the transverse direction may be the same, or one of them may be larger.
FIG. 7 is a cross-sectional view (end view) showing only the end face cut at the midpoint in the longitudinal direction of the shoulder corresponding portion 2. As shown in FIG. As shown in FIG. 7 , for example, a widthwise length 8W at the longitudinal midpoint of the long gap 8 , a widthwise length 7W at the longitudinal midpoint of the outer strip portion 7 , and a lengthwise direction of the inner strip portion 6 The transverse length 6W at the midpoint is substantially the same. In addition, it is preferable that the length 8W of the longitudinal gap 8 in the lateral direction is substantially uniform in the middle region including the midpoint in the longitudinal direction.
The length 8W in the widthwise direction of the long gap 8, the length 7W in the widthwise direction of the outer belt-shaped portion 7, and the length 6W in the widthwise direction of the inner belt-shaped portion 6 are substantially the same, so that when the backpack A is carried on the back. In addition, the outer band 7 and the inner band 6 can easily move independently of each other.

The specific dimensions of the lateral length of the outer belt-shaped portion 7 and the lateral length of the inner belt-shaped portion 6 can be set as appropriate. If the length is too small, the load applied to the shoulders through the outer band-shaped portion 7 and the inner band-shaped portion 6 may become too large when the backpack A is carried on the back (the outer band-shaped portion 7 and the inner band-shaped portion 6 may If the length is too large, the front shape of the outer strip 7 and the inner strip 6 will be too large. From this point of view, the lateral length of the outer strip portion 7 and the lateral length of the inner strip portion 6 are each independently, for example, 10 mm to 40 mm, preferably 20 mm to 30 mm.

Further, the specific dimension of the length of the long gap 8 in the lateral direction can be set as appropriate. If the length is too short, the outer belt-like portion 7 and the inner belt-like portion 6 are too close to each other, and when the backpack A is carried on the back, the outer belt-like portion 7 and the inner belt-like portion 6 may overlap each other. , the outer strip 7 and the inner strip 6 may be too far apart and the outer strip 7 may come off the user's shoulder. From this point of view, the length of the longitudinal gap 8 in the transverse direction is, for example, 5 mm to 60 mm, preferably 20 mm to 30 mm.
However, if the widthwise lengths of the outer belt-shaped portion 7, the inner belt-shaped portion 6, and the long gap 8 are not substantially uniform in the longitudinal direction, the specific dimensions of the widthwise lengths are the maximum values shall be adopted.

In terms of ease of bending, the outer band-shaped portion 7 and the inner band-shaped portion 6 may have approximately the same bending rigidity in the longitudinal direction, or one of them may have a greater bending rigidity than the other. Preferably, the bending stiffness of the outer strip 7 in the longitudinal direction is greater than the bending stiffness of the inner strip 6 in the longitudinal direction. The bending rigidity in the longitudinal direction is the easiness of bending when each of the outer band-shaped portion 7 and the inner band-shaped portion 6 is bent along the longitudinal direction in the side view shown in FIG. The outer band-shaped portion 7, which is the preferred example and has a high bending rigidity, is more difficult to bend along the longitudinal direction than the inner band-shaped portion 6. As shown in FIG.
Since the bending rigidity in the longitudinal direction of the outer band-shaped portion 7 is greater than that of the inner band-shaped portion 6, the burden on the shoulders when the backpack A is carried on the back can be reduced.
Methods for making the bending rigidity of the outer band-shaped portion 7 greater than that of the inner band-shaped portion 6 include (a) forming the outer band-shaped portion 7 with a material having higher rigidity than the material forming the inner band-shaped portion 6; ) forming the inner band-shaped portion 6 and the outer band-shaped portion 7 with a material having the same flexural rigidity, but increasing the thickness of the material forming the outer band-shaped portion 7;

7 and 8, a rigid member 51 is provided on the outer band-shaped portion 7 in order to increase the bending rigidity of the outer band-shaped portion 7. As shown in FIG. On the other hand, the inner strip portion 6 is not provided with the rigid member 51 .
As the rigid member 51, for example, a relatively hard synthetic resin plate-like body that can be bent by human power can be used.
As shown in FIGS. 7 and 8, the rigid member 51 made of a synthetic resin plate-like body has an elongated rectangular shape so as to extend over substantially the entire widthwise direction and the lengthwise direction of the outer band-shaped portion 7 . formed. Examples of the synthetic resin plate-like body include olefin resins such as polyethylene and polypropylene; styrene resins such as polystyrene and acrylonitrile styrene copolymer resins; polyester resins such as polyethylene terephthalate; vinyl chloride resins such as polyvinyl chloride. General-purpose resin plates such as resin; can be used.

Moreover, it is preferable that the outer band-shaped portion 7 and the inner band-shaped portion 6 are provided with cushioning materials 52 in order to reduce the burden on the shoulders. Examples of the cushioning material 52 include a foamed resin such as sponge, an elastic material such as elastomer and rubber, or a foam of the elastic material, and a cushioning material such as relatively thick cotton or non-woven fabric.
7 and 8, the cross-sectional structure of the outer band-shaped portion 7 includes, for example, a cushioning material 52 made of foamed resin or the like, and a plate-like rigid member 51 (synthetic resin plate-like member) attached to the cushioning material 52 . body), a lining sheet 53, and an outer sheet 54.
As the lining sheet 53 and the outer sheet 54, a sheet (fiber sheet) containing fibers such as woven fabric, knitted fabric, and non-woven fabric, a fiber composite sheet in which a material other than fibers such as resin is added to a part or the entire surface of the fiber sheet, Various sheets such as synthetic resin sheets can be used. In particular, the outer sheet 54 is preferably made of mesh cloth or mesh sheet (perforated sheet) in consideration of breathability.

By wrapping the cushioning material 52 and the rigid member 51 in layers with the lining sheet 53 and the outer sheet 54 and fixing the ends of the outer sheet 54, the outer band portion 7 having the cross-sectional structure shown in FIG. 7 is formed. Configured. The end portions of the outer sheet 54 are fixed by sewing or adhesion using an adhesive. The thick lines in FIGS. 7 and 8 indicate the sewing threads when they are fixed by sewing. Bias tapes 55 may be attached to the edges of the outer sheet 54 to hide the edges of the outer sheet 54, if desired.
The cross-sectional structure of the inner band-shaped portion 6 is similar to that of the outer band-shaped portion 7, as shown in FIG. there is

[Using a backpack]
The backpack A to which the shoulder belt 1 is attached is used by hanging the shoulder belt 1 on the user's shoulder, as shown in FIG.
FIG. 9 is an enlarged perspective view of one shoulder belt 1 and the vicinity of the shoulder when the user carries the backpack A, and FIG. 10 is a cross-sectional view thereof.
The shoulder belt 1 of the present invention has an inner belt-like portion 6 and an outer belt-like portion 7 in which the shoulder corresponding portion 2 is arranged in the transverse direction with a long gap 8 interposed therebetween. The inner strip 6 and the outer strip 7 can move independently of each other. Therefore, as shown in FIGS. 4, 9 and 10, the inner strip 6 and the outer strip 7 are in close contact with the shoulders inside and outside. A load caused by the weight of the items put in the bag body 9 is applied to the user's shoulder through the shoulder corresponding portion 2. The separation allows the load on the shoulders to be distributed. The backpack A having such a shoulder belt 1 can give the user a good feeling of use.

If the inner band-shaped portion 6 and the outer band-shaped portion 7 are overlapped on the shoulder portion during use, the effect of dispersing the load is reduced. This makes it difficult for both belt-shaped portions to overlap vertically.
In addition, since the longitudinal length of each of the outer band-shaped portion 7 and the inner band-shaped portion 6 is set to 100 mm to 400 mm as described above, the outer band-shaped portion 7 does not reach the shoulder even when the user walks while swinging his arms. It becomes difficult to slip off.

Furthermore, since the longitudinal length of the outer band-shaped portion 7 is formed to be smaller than the longitudinal length of the inner band-shaped portion 6, as shown in FIG. come into surface contact with the top surface of the
Specifically, since the trapezius muscle generally exists in the human shoulder, the upper surface of the shoulder slopes downward from the neck toward the deltoid muscle. In the case where the shoulder corresponding portion 2 has the separated outer band-shaped portion 7 and inner band-shaped portion 6 as in the present invention, when the backpack A is carried on the back, the outer band-shaped portion 7 corresponds to the vicinity of the inner side of the deltoid muscle and the inner band-shaped portion. Part 6 comes to correspond to the trapezius muscle. Since the longitudinal length of the inner band-shaped portion 6 corresponding to the raised trapezius muscle is large and the longitudinal length of the outer band-shaped portion 7 corresponding to the portion lowered from the trapezius muscle is small, as shown in FIG. , the lower surface of the outer strip 7 and the lower surface of the inner strip 6 are in surface contact with the upper surface of the shoulder.
Since the outer band-shaped portion 7 and the inner band-shaped portion 6 come into surface contact with the shoulder portion in this way, localized pressure is less likely to be applied to the shoulder portion. Since the shoulder belt 1 of the present invention is less likely to be subjected to localized pressure, it is possible to provide the user with a better feeling of use.

[Second embodiment]
In the shoulder belt 1 of the first embodiment, at least two band-shaped portions 6 and 7 (the inner band-shaped portion 6 and the outer band-shaped portion 7) of the shoulder corresponding portion 2 are gathered at the upper end thereof. As shown at 11, the upper end 6a of the inner strip 6 and the upper end 7a of the outer strip 7 may be separated. In this case, the upper end portion of the inner band-shaped portion 6 and the upper end portion of the outer band-shaped portion 7 both form end portions that can be attached to the bag body 9 .
The shoulder belt 1 of the second embodiment is the same as that of the first embodiment, except that the end of the inner strip 6 and the end of the outer strip 7 are separated. Therefore, the description of the configuration and effects of the shoulder belt 1 of the second embodiment is omitted, and the terms and symbols of the first embodiment are used as they are.

FIG. 12 is a front view of a backpack A in which the shoulder belt 1 of the second embodiment is attached to the bag body 9. FIG.
By fixing the upper end portion 6a of the inner strip portion 6 and the upper end portion 7a of the outer strip portion 7 of the shoulder belt 1 of the second embodiment to predetermined positions of the bag main body 9, a backpack as shown in FIG. A is obtained.
In the shoulder belt 1 of this embodiment, the ends 6a and 7a of the inner strip portion 6 and the outer strip portion 7 are separated. It can be attached to a predetermined position on the main body 9 . Therefore, the longitudinal length of the inner belt-shaped portion 6 and the longitudinal length of the outer belt-shaped portion 7 in the finished backpack A can be adjusted when the backpack A is assembled.
As in the first embodiment, in the shoulder belt 1 in which the upper ends of the inner band-shaped portion 6 and the outer band-shaped portion 7 are gathered, the length of the inner band-shaped portion 6 in the longitudinal direction is equal to the length of the inner band-shaped portion 6 when the shoulder belt 1 is manufactured. The width and the longitudinal length of the outer band-shaped portion 7 are formed according to design standards. For this reason, the shoulder belt 1 of the first embodiment does not need to adjust the length of each belt-like portion when attaching the shoulder belt 1 to the bag body 9, and is suitable for mass-producing backpacks A.

[Third Embodiment]
In each of the above-described embodiments, the backpack A in which the pair of shoulder belts 1 are attached to the bag body 9 was illustrated, but the present invention is not limited to this.
For example, the backpack of the present invention may have one shoulder belt attached to the main body of the bag (not shown). Such a backpack provided with one shoulder belt is also called a one-sided bag.

[others]
The description of each embodiment described above includes the following aspects.
The longitudinal length of the outer strip portion 7 of the shoulder belt 1 is smaller than the longitudinal length of the inner strip portion 6 . When the shoulder belt 1 is put on the shoulder, the outer belt-like portion 7 is positioned outside the shoulder and the inner belt-like portion 6 is positioned inside the shoulder. Since the human shoulder slopes downward from the neck toward the deltoid muscle, the relationship of the longitudinal length of the outer strip 7<the longitudinal length of the inner strip 6 allows the outer strip 7 and the Both of the inner strip portions 6 are likely to come into surface contact with the upper surface of the shoulder portion. For this reason, the pressure applied to the shoulder is distributed, and the user can be provided with a good feeling of use.

The bending rigidity in the longitudinal direction of the outer strip portion 7 of the shoulder belt 1 is greater than the bending rigidity in the longitudinal direction of the inner strip portion 6 . Since the human shoulder slopes downward from the neck toward the deltoid muscle, the inner strip 6 exerts less pressure on the shoulder than the outer strip 7 . Bending rigidity in the longitudinal direction of the outer belt-shaped portion 7>Bending rigidity in the longitudinal direction of the inner belt-shaped portion 6 Due to the relationship, the inner belt-shaped portion 6 is in relatively soft contact with the shoulder, so the backpack A was carried on the back. It can sometimes reduce shoulder strain.

The width of the shoulder belt 1 at the middle point in the longitudinal direction of the inner belt-shaped portion 6, the width of the width at the middle point of the outer belt-shaped portion 7 in the longitudinal direction, and the length of the middle point in the longitudinal direction of the long gap 8 The hand direction length is substantially the same. Due to this relationship, the outer band-shaped portion 7 and the inner band-shaped portion 6 can easily move independently without interfering with each other. Therefore, when the bag A is carried, the outer belt-like part 7 and the inner belt-like part 6 come into close contact with the shoulders while being spaced apart from each other, so that the load applied to the shoulders is dispersed.

The length of the long gap 8 of the shoulder belt 1 in the short side direction is substantially uniform in the middle region including the midpoint in the longitudinal direction. The outer strip 7 and the inner strip 6 separated by the long gap 8 do not interfere with each other at both ends in the longitudinal direction, but may interfere with each other at the intermediate point in the longitudinal direction. The lateral length of the long gap 8 separating the outer belt-shaped part 7 and the inner belt-shaped part 6 is substantially uniform in the longitudinal middle region, so that the outer belt-shaped part 7 and the inner belt-shaped part 6 interfere with each other. You can prevent conflicts.

The length in the longitudinal direction of the portion 2 corresponding to the shoulder of the shoulder belt 1 is 0.25 to 0.8 times the combined length in the lengthwise direction of the portion 2 corresponding to the shoulder and the portion 3 corresponding to the chest. Since the length of the shoulder corresponding portion 2 in the longitudinal direction is within the above range, the shoulder corresponding region 2 is in contact with the back surface, the top surface and the front surface of the shoulder portion, and it is easy to fit the shoulder portion. The shoulder belt 1 having such a shoulder-corresponding region 2 can give the user a good feeling of use.

The shoulder corresponding portion 2 of the shoulder belt 1 has an end portion 2a that can be attached to the bag body 9, and the inner band portion 6 and the outer band portion 7 are gathered at the end portion 2a of the shoulder corresponding portion 2. It is By attaching the end portion 2a of the shoulder belt 1 to the bag main body 9, the backpack A having the appropriately designed inner strip portion 6 and outer strip portion 7 can be manufactured.

1 Shoulder belt for backpack 2 Shoulder corresponding part 3 Chest corresponding part 4 Connecting part 6 Inner belt-like part 7 Outer belt-like part 8 Long gap 9 Bag body A Backpack bag

Claims (7)

A shoulder belt for carrying a bag, which is used by being attached to the main body of the bag, and has a long shape in which a shoulder corresponding part and a chest corresponding part are connected to each other,
The shoulder-corresponding portion has an inner band-shaped portion and an outer band-shaped portion that are laterally aligned with an elongated gap extending in the longitudinal direction ,
A shoulder belt for a backpack , wherein the longitudinal length of the outer belt-shaped portion is smaller than the longitudinal length of the inner belt-shaped portion . A shoulder belt for carrying a bag, which is used by being attached to the main body of the bag, and has a long shape in which a shoulder corresponding part and a chest corresponding part are connected to each other,
The shoulder-corresponding portion has an inner band-shaped portion and an outer band-shaped portion that are laterally aligned with an elongated gap extending in the longitudinal direction,
A shoulder belt for a backpack, wherein the bending rigidity in the longitudinal direction of the outer band-shaped portion is greater than the bending rigidity in the longitudinal direction of the inner band-shaped portion . The lateral length at the longitudinal midpoint of the inner strip, the lateral length at the longitudinal midpoint of the outer strip, and the lateral length at the longitudinal midpoint of the long gap are approximately 3. The shoulder belts for backpacks according to claim 1 or 2, which are the same. 4. The shoulder belt for a backpack according to any one of claims 1 to 3, wherein the longitudinal length of the longitudinal gap is substantially uniform in a midway region including the longitudinal midpoint thereof. The longitudinal length of the shoulder corresponding portion is 0.25 to 0.8 times the combined longitudinal length of the shoulder corresponding portion and the chest corresponding portion. Shoulder belt for carrying bag described. The shoulder corresponding portion has an end portion that can be attached to the bag body,
6. The shoulder belt for a backpack according to any one of claims 1 to 5, wherein the inner band-shaped portion and the outer band-shaped portion are assembled at the ends of the shoulder corresponding portions. Having a shoulder belt according to any one of claims 1 to 6 and a bag body,
A backpack in which the end of the shoulder belt corresponding to the shoulder is attached to the upper part of the bag body, and the end of the chest corresponding part of the shoulder belt is attached to the lower part of the bag body. .

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