backpack

Abstract

To provide a backpack capable of reducing a physical burden on a wearer by reducing a burden on the shoulders and the waist of the wearer.SOLUTION: A backpack including a bag-like body 1 and a pair of left / right shoulder belts 2 connected to an upper part and a lower part of a back surface 4 of the body 1, includes a pair of left / right load pad rows 11 and 11 for applying a baggage load to the spine of a wearer, formed at symmetrical positions on both sides of a center line P bisecting the back surface 4 in a horizontal direction. Each load pad row 11 is composed of a plurality of elastic pads 10 that is vertically arranged in rows, with prescribed intervals apart in the vertical direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a backpack or other backpack with an improved back portion that comes into contact with the wearer's back. [Background technology]

[0002] It is well known that a backpack bag, which is designed to be carried on the wearer's back and includes a bag-shaped main body and a pair of left and right shoulder straps connected to the upper and lower parts of the back of the main body, has a cushion on the back. The cushion allows the back of the backpack bag to fit snugly against the wearer's back, allowing the wearer to wear the backpack bag comfortably. The unevenness of the cushion allows for an appropriate gap between the wearer's back and the back of the backpack, improving air circulation and preventing the wearer's back from getting stuffy.

[0003] Cushions come in various forms. For example, Patent Document 1 discloses a spacer member having numerous protrusions on the back of a backpack to improve breathability between the wearer's back and the back of the backpack. The spacer member is vertically divided into five regions, with protrusions provided in at least the topmost first region and the bottommost fifth region. Protrusions are also provided in the second region below the first region and the third region below that, and a ventilation region without protrusions is formed in the fourth region below that. By providing ventilation regions in this manner, breathability in the lower part of the wearer's back can be improved, reducing uncomfortable sweat buildup. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-41072 Summary of the Invention [Problem to be solved by the invention]

[0005] For example, mountain climbing requires long periods of walking while carrying heavier loads. For this reason, various measures have been taken to make mountain climbing backpacks less tiring to carry for long periods of time, including providing cushioning and breathability on the back, as described above. However, these measures have not contributed to resolving the fundamental issue of backpacks, namely, reducing the physical burden on the wearer, and this has left room for improvement. In other words, conventional backpacks are designed based on the idea that the load is basically supported by the shoulders and waist, and therefore it is not possible to reduce the burden on the shoulders and waist to reduce the physical burden on the wearer, leaving room for improvement.

[0006] An object of the present invention is to provide a backpack that reduces the burden on the shoulders and waist of the wearer, thereby reducing the physical burden on the wearer. [Means for solving the problem]

[0007] The inventors have completed the present invention based on the finding that if the load of the backpack is actively applied to the spine of the wearer, and the load is borne by the spine of the wearer, the burden on the shoulders and waist of the wearer can be reduced, thereby reducing the physical burden on the wearer.

[0008] That is, the present invention relates to a backpack bag that includes a bag-shaped main body 1 and a pair of left and right shoulder straps 2 connected to the upper and lower parts of the back surface 4 of the main body 1, and is intended for use when worn on the wearer's back. The pads formed on the back surface 4 and that come into contact with the wearer's back when worn on the wearer's back consist of only a pair of left and right load pad rows 11, 11 for applying the load of the luggage to the wearer's spine. Each load pad row 11 is spaced apart in the vertical direction by a predetermined distance and is made up of a plurality of elastic pads 10 arranged in a row in the vertical direction. The pair of left and right load pad rows 11, 11 are formed in symmetrical positions across a center line P that bisects the back surface 4 in the horizontal direction, and are configured so that when worn on the wearer's back, the pair of left and right load pad rows 11, 11 are positioned to sandwich the wearer's spine without coming into contact with the spinous processes of the spine. When the device is worn on the back, the uppermost elastic pad 10 of the multiple elastic pads 10 constituting the load pad row 11 is at the height of the seventh cervical vertebra of the spine of the wearer, and the lowermost elastic pad 10 is at the height of the lower part of the spine, which is located above the upper end of the sacrum of the wearer, and the load pad row 11, which is made up of multiple elastic pads 10 including these uppermost and lowermost elastic pads 10, extends over the entire length from the seventh cervical vertebra of the spine to the lower part of the spine. The present invention is characterized in that it is configured to be arranged in such a manner that the

[0010] More specifically, it is desirable to adopt a configuration in which the waist belt 3 is connected to the lower part of the back surface 4 of the main body 1, the vertical distance D1 from the upper connecting part of the shoulder belt 2 to the upper end of the load pad row 11 is set to within 100 mm, the vertical distance D2 from the center of the width direction of the waist belt 3 to the lower end of the load pad row 11 is set to within 150 mm, and the left-right spacing distance D3 from the center line P to the opposing inner edges of the elastic pads 10 that make up the load pad row 11 is set to be 5 mm or more and 50 mm or less.

[0011] Each load pad row 11 is made up of 5 to 20 elastic pads 10. [Effects of the Invention]

[0012] As in the present invention, when a pair of left and right load pad rows 11-11 are formed at symmetrical positions on either side of the center line P that divides the back surface 4 in the left-right direction, for applying the load of the luggage to the wearer's spine (in other words, when a pair of left and right load pad rows 11-11 are formed for the purpose of applying the load of the luggage to the wearer's spine), the load of the luggage can be actively applied to the wearer's spine via the load pad rows 11-11, thereby relatively reducing the burden on the wearer's shoulders and waist and suppressing the physical burden. In other words, although there was previously a concept of the load being borne by the entire back when carrying a luggage on one's back, such as with a "back carrier" or "carrying on one's back," in reality, most of the load of the luggage is borne by the shoulders and waist. In contrast, in the present invention, the back surface 4 of the backpack is provided with rows of load pads 11, 11 for applying the load to the wearer's spine. This actively applies the load to the spine, increasing the load on the spine, thereby reducing the load acting on the shoulders and waist. Furthermore, since the load is borne by the spine as well as the shoulders and waist, the localized burden on the shoulders and waist is reduced, reducing the overall burden on the body. Since the load is borne by the spine as well as the shoulders and waist, it becomes possible to carry a heavier load. It also becomes possible to carry the load for a longer period of time.

[0013] If each load pad row 11 is composed of a plurality of elastic pads 10 arranged in a vertical row at a predetermined interval, the posture of each elastic pad 10 can be changed to follow the curvature of the wearer's spine, and the load pad row 11 can be aligned with the wearer's spine. This allows the load pad row 11 to be stably positioned near the wearer's spine even when the curvature of the wearer's spine changes, so that the load can be more appropriately supported by the wearer's spine and the burden on the wearer's shoulders and waist can be reduced.

[0014] When the backpack is worn, if the pair of load pad rows 11 are arranged in positions sandwiching the spinal column without contacting the spinous processes of the wearer's spine, the load of the baggage can be prevented from directly acting on the spinal column and spinous processes, thereby preventing damage to the spinal column.

[0015] The inventors believe that the load of the luggage should be applied to the area of ​​the spine from the seventh cervical vertebra through the thoracic and lumbar vertebrae to the sacrum via the load pad row 11 that constitutes the backpack of the present invention. For this reason, if the multiple elastic pads 10 that make up the load pad row 11 are arranged between the seventh cervical vertebra that constitutes the spine and the upper end of the sacrum, the load of the luggage can be applied appropriately to these areas and supported by the spine of the wearer.

[0016] Generally, a backpack wearer selects a backpack that fits his or her height. Specifically, as shown in Figure 3, a backpack is selected in which the back length L, defined by the vertical distance from the upper connector of shoulder belt 2 to the center of the width of waist belt 3, matches the vertical distance from the seventh cervical vertebra C7 to the top of the sacrum S of the wearer's spine. Therefore, by setting the vertical distance D1 from the upper connector of shoulder belt 2 to the top of load pad row 11 to within 100 mm and the vertical distance D2 from the center of the width of waist belt 3 to the bottom of load pad row 11 to within 150 mm, load pad row 11 can be arranged along almost the entire length of the spine from the seventh cervical vertebra C7 to the sacrum S, allowing the load to be more appropriately supported by the wearer's spine and reducing the burden on the wearer's shoulders and waist.

[0017] When the lateral spacing distance D3 from the center line P to the opposing inner edges of the elastic pads 10 constituting the load pad row 11 is set to 5 mm or more and 50 mm or less, the distance from the spinous processes at the center of the wearer's spine to the load pad row 11 is optimized, allowing the load pad row 11 to more appropriately perform its function of applying the load to the wearer's spine. If D3 is less than 5 mm, there is a risk of contact with the spinous processes. If D3 exceeds 50 mm, the load cannot be appropriately applied to the wearer's spine.

[0018] When each load pad row 11 is composed of 5 to 20 elastic pads 10, the posture of each elastic pad 10 can be changed to follow the curvature of the spine, allowing the elastic pads 10 to be more stably attached to the wearer's back. If there are fewer than five elastic pads 10, the load pad row 11 cannot follow the curvature of the spine. If there are more than 20 elastic pads 10, each elastic pad 10 becomes small and the contact area becomes smaller, making it difficult to properly apply the load to the wearer's spine. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a rear view of a backpack (backpack) according to an embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. 1 is a diagram showing the relationship between the wearer's spine and the back length of the backpack. [Figure 4] FIG. 2 is an enlarged view of a main part of FIG. [Figure 5] FIG. 5 is a cross-sectional view taken along line AA in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] (Embodiment) An embodiment in which the backpack of the present invention is applied to a backpack is shown in Figs. 1 to 5. This backpack comprises a bag-shaped main body 1 for storing luggage, a pair of left and right shoulder straps 2 for carrying the backpack, and a waist belt 3 wrapped around the waist of the wearer. Each of the straps 2, 3 is connected to the back surface 4 of the main body 1 (the surface facing the wearer's back). Specifically, one end of each shoulder strap 2 is sewn to the upper part of the back surface 4 of the main body 1, and the other end is sewn to the lower part near the left or right edge of the back surface 4. The waist belt 3 is composed of a left belt 5 and a right belt 6 of approximately the same length. One end of each of the left and right belts 5, 6 is sewn to the lower part of the back surface 4 of the main body 1, near the center of the left and right sides, and the other ends are connected to buckles 7, 7 that can be elastically engaged with each other. The wearer can wear the main body 1 by putting their arms through the shoulder straps 2, and then by engaging the buckles 7, 7 together in front of themselves, the waist belt 3 can be wrapped around the wearer's body.

[0021] It is desirable for the wearer to select a backpack that fits their height. Specifically, as shown in Fig. 3, it is desirable for the vertical length of the back surface 4 of the main body 1, i.e., the back surface length L, to match the vertical length from the seventh cervical vertebra C7 to the top of the sacrum S of the wearer's spine. In this embodiment, the back surface length L of the main body 1 is defined as the vertical length from the upper base (connecting portion) of the shoulder belts 2 to the center of the waist belt 3 in the width direction (vertical direction).

[0022] A pair of left and right load pad rows 11 each consisting of a plurality of elastic pads 10 are provided on the back surface 4 of the main body 1. These load pad rows 11 are arranged parallel to a center line P that divides the back surface 4 into left and right halves, and are symmetrically arranged with respect to the center line P. In this embodiment, each load pad row 11 is composed of five elastic pads 10 arranged vertically. Each elastic pad 10 is formed into a rectangular plate (rectangular parallelepiped) using a material such as polyurethane, which has excellent cushioning properties, and is adhesively fixed to the back surface 4. The thickness dimension T of each elastic pad 10 in a direction perpendicular to the back surface 4 is approximately the same, and in a free state, it is preferably set within a range of 5 mm to 100 mm, and more preferably set within a range of 10 mm to 70 mm. In this embodiment, the thickness dimension T is set to 20 mm. In each load pad row 11, the gap between adjacent elastic pads 10 is set to approximately 15 mm.

[0023] Furthermore, a cover 13 that covers all of the elastic pads 10 is sewn to the back surface 4. The cover 13 is formed into a vertically long rectangle using a material such as cloth, and has seams 14 formed along its periphery. The space between the back surface 4 and the cover 13, surrounded by these seams 14, is divided into a plurality of small compartments 16 by seams 15 that extend in the vertical and horizontal directions, and each small compartment 16 contains one elastic pad 10. Note that the cover 13 is not essential in the present invention and can be omitted as necessary.

[0024] Each load pad row 11 is disposed within the back length L of the main body 1, i.e., between the upper base of the shoulder belt 2 and the widthwise center of the waist belt 3. The vertical distance D1 from the upper base of the shoulder belt 2 to the top of the load pad row 11 is preferably set to within 100 mm, more preferably within 50 mm. The vertical distance D2 from the widthwise center of the waist belt 3 to the bottom of the load pad row 11 is preferably set to within 150 mm, more preferably within 50 mm. Furthermore, the left-right spacing distance D3 from the center line P of the back surface 4 of the main body 1 to the opposing inner edges of the elastic pads 10 constituting the load pad row 11 is preferably set to within a range of 5 to 100 mm (5 mm or more and 100 mm or less), more preferably within a range of 5 to 50 mm (5 mm or more and 50 mm or less). In this embodiment, the distance D1 is set to 50 mm, the distance D2 is set to 100 mm, and the distance D3 is set to 30 mm.

[0025] The load pad row 11, set to the above dimensions, elastically abuts against the back of the wearer wearing the backpack, specifically against both the left and right sides of the area from the seventh cervical vertebra C7 to the upper end of the sacrum S that make up the wearer's spinal column. This allows part of the weight of the backpack's main body 1 to be supported by the wearer's spinal column, preventing the load from being concentrated on the wearer's shoulders or waist. In addition, the load pad row 11 prevents the entire back surface 4 of the main body 1 from being in close contact with the wearer's back, improving breathability of the back.

[0026] As in this embodiment, a pair of left and right load pad rows 11·11 for applying the luggage weight to the wearer's spine are formed at symmetrical positions on either side of the center line P that divides the back surface 4 in the left-right direction (in other words, a pair of left and right load pad rows 11·11 are formed for the purpose of applying the luggage weight to the wearer's spine), so that the luggage weight can be actively applied to the wearer's spine through the load pad rows 11·11, thereby relatively reducing the burden on the wearer's shoulders and waist and suppressing the physical burden.

[0027] If each load pad row 11 is composed of a plurality of elastic pads 10 arranged in a vertical row at a predetermined interval, the posture of each elastic pad 10 can be changed to follow the curvature of the wearer's spine, and the load pad row 11 can be aligned with the wearer's spine. This allows the load pad row 11 to be stably positioned near the wearer's spine even when the curvature of the wearer's spine changes, so that the load can be more appropriately supported by the wearer's spine and the burden on the wearer's shoulders and waist can be reduced.

[0028] When the rucksack is worn, if the pair of load pad rows 11 are arranged in positions sandwiching the spinal column without contacting the spinous processes of the wearer's spine, the load of the baggage can be prevented from directly acting on the spinal column and spinous processes, thereby preventing damage to the spinal column.

[0029] The inventors believe that the load of a luggage should be applied to the area of ​​the spine from the seventh cervical vertebra through the thoracic and lumbar vertebrae to the sacrum via the load pad row 11 that constitutes the backpack of the present invention. For this reason, if the multiple elastic pads 10 that make up the load pad row 11 are arranged between the seventh cervical vertebra that constitutes the spine and the upper end of the sacrum, the load can be applied appropriately to these areas and supported by the spine of the wearer.

[0030] If the vertical distance D1 from the upper connecting part of the shoulder belt 2 to the top end of the load pad row 11 is set to within 100 mm, and the vertical distance D2 from the width center of the waist belt 3 to the bottom end of the load pad row 11 is set to within 150 mm, the load pad row 11 can be arranged over almost the entire length of the spine from the seventh cervical vertebra C7 to the sacrum S, so that the luggage load can be more appropriately supported by the wearer's spine, reducing the burden on the wearer's shoulders and waist.

[0031] When the lateral spacing distance D3 from the center line P to the opposing inner edges of the elastic pads 10 constituting the load pad row 11 is set to 5 mm or more and 50 mm or less, the distance from the spinous processes at the center of the wearer's spine to the load pad row 11 is optimized, allowing the load pad row 11 to more appropriately perform its function of applying the load to the wearer's spine. If D3 is less than 5 mm, there is a risk of contact with the spinous processes. If D3 exceeds 50 mm, the load cannot be appropriately applied to the wearer's spine.

[0032] When each load pad row 11 is composed of 5 to 20 elastic pads 10, the posture of each elastic pad 10 can be changed to follow the curvature of the spine, allowing the elastic pads 10 to be more stably attached to the wearer's back. If there are fewer than five elastic pads 10, the load pad row 11 cannot follow the curvature of the spine. If there are more than 20 elastic pads 10, each elastic pad 10 becomes small and the contact area becomes smaller, making it difficult to properly apply the load to the wearer's spine.

[0033] In addition to the above, the elastic pads 10 can be formed into a disk (cylindrical) shape or a polygonal plate (polygonal prism) shape. The number of elastic pads 10 constituting the load pad row 11 is not limited to five. The load pad row 11 may be inclined with respect to the center line P of the back surface 4 of the main body 1, or may be bent or curved. Two or more load pad rows 11 may be formed on each of the left and right sides of the center line P. In addition to the above-mentioned backpack, the present invention can also be applied to other types of backpacks, such as school bags. [Explanation of symbols]

[0034] 1 Main body 2 shoulder straps 3 Waist belt 4 Back 10 Elastic Pads 11 Load Pad Rows

Claims

1. The backpack comprises a bag-shaped main body (1) and a pair of left and right shoulder straps (2) connected to the upper and lower parts of the back surface (4) of the main body (1), and is intended to be carried on the wearer's back: The pads formed on the back (4) and in contact with the back of the wearer when the bag is carried on the back are composed of only a pair of left and right load pad rows (11, 11) for applying the load to the spine of the wearer, Each load pad row (11) is composed of a plurality of elastic pads (10) arranged in a vertical line at predetermined intervals in the vertical direction, The pair of left and right load pad rows (11, 11) are formed at symmetrical positions sandwiching a center line (P) that divides the back surface (4) in the left and right directions, and are configured so that when the pack is carried on the back, the pair of left and right load pad rows (11, 11) are arranged at positions sandwiching the spinal column of the wearer without coming into contact with the spinous processes of the spine of the wearer; When the carrier is carried on the back, the uppermost elastic pad (10) of the plurality of elastic pads (10) constituting the load pad row (11) is located at the height of the seventh cervical vertebra of the spine of the wearer, and the lowermost elastic pad (10) is located at the height of the lower part of the spine, which is located above the upper end of the sacrum of the wearer, and the load pad row (11) consisting of the plurality of elastic pads (10) including these uppermost and lowermost elastic pads (10) is arranged over the entire length from the seventh cervical vertebra of the spine to the lower part of the spine, A waist belt (3) is connected to the lower part of the back surface (4) of the main body (1), The vertical distance (D1) from the upper connecting portion of the shoulder belt (2) to the upper end of the load pad row (11) is set to within 100 mm, The elastic pad (10) located at the bottom is located above the waist belt (3), and the vertical distance (D2) from the center of the waist belt (3) in the vertical width direction to the lower end of the elastic pad (10) located at the bottom is set to within 150 mm; The backpack is characterized in that the distance (D3) in the left-right direction from the center line (P) to the opposing inner edges of the elastic pads (10) constituting the load pad row (11) is set to 5 mm or more and 50 mm or less.

2. A backpack as described in claim 1, wherein each load pad row (11) is composed of 5 to 20 elastic pads (10).

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