Shoulder belt support

Abstract

To provide a shoulder belt auxiliary tool which is easy to put on and adjust its position and prevents the back part from coming into close contact with the back when using a school bag, rucksack or pack, causing an uncomfortable state due to insufficient evaporation of sweat. [Solution] The device comprises a tubular body 2 having a cylinder or a polygonal prism with a cavity at the center of the axis, and a fastener 3 for attaching to a shoulder belt 6a of a school bag 6, rucksack or pack, which penetrates the cavity of the tubular body and protrudes at both ends, the tubular body or the surface layer of the tubular body being made of a flexible material which is a foamable resin composition such as urethane foam, polystyrene foam or foamed rubber, or a rubber or soft resin composition, the fastener being made of an expandable material which is rubber, elastic band, flat elastic, woven elastic, knitted elastic, springs and / or combinations thereof, and both ends of the fastener are provided with fixing means 4 which is a hook-and-loop fastener, carabiner, buckle, feed ring, square ring or clip which can be attached to and detached from the shoulder belt and can be moved along the shoulder belt.

Description

[Technical field]

[0001] This invention relates to a shoulder belt auxiliary device that can be detachably attached between both shoulder belts of a backpack, rucksack, pack, etc., and that can be moved between the backrest of the backpack, rucksack, pack and the user's back, or to the bottom of the shoulder belt. [Background technology]

[0002] When a user wears a backpack, rucksack, or pack with double shoulder straps, the gap between the user's back and the back of the backpack, pack, or backpack is narrowed by the double shoulder straps, and the backpack is fixed in a moderately tight fit. Therefore, even if the user has stored luggage inside the backpack, pack, or backpack, the backpack, pack, or backpack can be stably carried by supporting it with the wide part of the user's back.

[0003] Such double shoulder straps are fixed in place with the back of the backpack, rucksack, or pack in close contact with the user's back. In particular, school backpacks have a structure with a cushioned back pad on the back that enhances the fit to the back so that even small children can carry them stably.

[0004] However, when the temperature rises, the back part of the backpack is fixed in a more tightly fitted state, which causes a lot of sweating and discomfort. In recent years, textbooks have become larger as the size changes from B to A, and the weight of the items stored in the backpack has increased, which makes the back part of the backpack more likely to stick to the back, causing more discomfort.

[0005] As a result, it is often observed that students shift the tops of the shoulder straps of their school bags backwards to leave a large space above them, or put the shoulder strap over one shoulder and use the school bag without the back touching it against their back, so that the back of the school bag is not tightly pressed against their back.

[0006] However, if the tops of the shoulder straps on both shoulders are shifted backward, the center of gravity moves downward and backward, making the backpack feel heavier. Also, if the backpack's shoulder strap is placed on one shoulder, the load is unevenly distributed, which constantly puts pressure on the spine and causes poor posture. Therefore, improvements were needed.

[0007] To address these shortcomings, improvements have been made to the backrest of school bags, rucksacks, and packs, with grooves provided in part of the backrest to create a gap between the back and the backpack, and improvements have been made to the backrest pad that allows air to pass through by providing breathable open-cell sponge covered with a mesh-structure cover.

[0008] However, even with the above improvements, most of the back of the school bag, rucksack or pack is still in close contact with the user's entire back, which often means that sweat cannot evaporate in time, creating an uncomfortable feeling.

[0009] In addition, to address the above-mentioned shortcomings, back pads for school bags, rucksacks, and packs that have cooling gel inside are also available for sale.

[0010] However, the above-mentioned back pad with built-in cooling gel requires the cooling gel to be cooled before use, and since the cooling gel can only maintain a low temperature for a limited period of time, it must be cooled frequently, making it inconvenient.

[0011] Furthermore, if the temperature inside the cooling gel is excessively low, the local body temperature of the back will drop too low when it is in contact with the body, causing discomfort. Also, if the cooling gel warms up over a certain period of time during use, the temperature will rise above the body surface temperature, causing discomfort. Further improvements are desired.

[0012] Furthermore, there has been a proposal for a backrest that prevents backpacks from getting stuffy, which is made of a material that does not easily deform or compress, such as plastic, with a cushioning material on top and both ends of the lower ends of the shoulder belts attached so that the cushioning surface faces the back (Patent Document 1).

[0013] However, the cushion surface of the device proposed in the above Patent Document 1 must be adjusted so that it faces the back each time it is worn. Also, if the orientation shifts during use and the cushion surface no longer touches the back, pain will occur, so the backrest attachment direction must be fine-tuned even during use. Also, since the device is attached to both ends of the lower ends of the shoulder belts, there is no freedom in the placement position, which is inconvenient and requires improvement.

[0014] In particular, when small children in the elementary school or women with narrow shoulders carry school bags, backpacks, or packs, the shoulder straps tend to spread apart, causing them to slip off the shoulders, making it difficult to carry the backpack, backpack, or pack stably. Therefore, chest belts that connect the shoulder straps together to prevent the width between the shoulder straps from spreading are available on the market.

[0015] However, if the chest belt is used to fix the distance between the shoulder belts and prevent them from spreading out to the left and right, the width between the shoulder belts is restricted to a certain range. As a result, the back of the backpack, rucksack, or pack is tightly attached to the back, and even if sweat is produced, it cannot be dissipated, making the back more likely to become stuffy and causing more discomfort, so the chest belt, which serves as a mechanism for restricting the width between the shoulder belts to a certain range in backpacks, rucksacks, and packs, has been difficult to use.

[0016] In addition, the chest belt is designed to be used by connecting the two shoulder belts at the chest so that they cross the front of the body. Therefore, when the school bag, backpack, or pack is pulled from behind or from the left and right, or gets caught on something, the chest belt that connects the two shoulder belts at the chest so that they cross the front of the body gets in the way and prevents the two shoulder belts from spreading out to the left and right, making it difficult for the school bag, backpack, or pack to come off the user. This can lead to situations where the user is dragged along with the school bag, backpack, or pack, or falls over, which is particularly dangerous when used by small children, and raises safety and crime prevention concerns.

[0017] Furthermore, if a school bag is loaded with a lot of belongings, the lock at the bottom and the darumakan (metal fitting connecting the lower belt and the school bag body) hit the desk or floor hard when the school bag is placed on the desk or floor, making it more likely to break during use. Therefore, in order to make the school bag usable for a long time from the lower to upper grades of elementary school, special measures are required for the lock and darumakan, which causes the price to increase, and the incorporation of special measures imposes restrictions on the mechanism, reducing the degree of freedom in designing the relevant parts, and improvements are being sought. [Prior art documents] [Patent documents]

[0018] [Patent Document 1] JP 2016-147037 A Summary of the Invention [Problem to be solved by the invention]

[0019] The problem that this invention aims to solve is to provide a shoulder belt auxiliary device having a new structure that prevents the back part of a backpack, rucksack, or pack having shoulder belts on both shoulders from coming into close contact with the user's back, causing an uncomfortable condition due to insufficient evaporation of sweat.

[0020] In addition, the problem that this invention aims to solve is to provide a shoulder belt auxiliary device with a new structure that can be easily attached to a backpack, rucksack, or pack that has shoulder belts on both shoulders and does not require fine adjustment of the attachment direction during use.

[0021] Furthermore, the problem that this invention aims to solve is to provide a shoulder belt auxiliary device with a new structure that makes it easy for both shoulder belts to come off the user's shoulders even when the school bag, rucksack, or pack is pulled from behind or from the left or right, or when the school bag, rucksack, or pack gets caught on something, and does not pose safety or crime prevention concerns.

[0022] Furthermore, the problem that the present invention aims to solve is to provide a shoulder belt auxiliary device having a new structure that reduces the shock when the school bag is placed on a desk or floor and prevents damage to the lower lock part and the daruma ring. [Means for solving the problem]

[0023] Therefore, through trial and error, the inventors have devised and put into practical use a shoulder belt auxiliary device with a new structure that prevents the back of the backpack, pack or school bag from coming into close contact with the user's back, causing sweat to not evaporate in time, resulting in an uncomfortable situation, even if the width between the two shoulder belts is restricted to a certain range; this shoulder belt auxiliary device also does not require fine adjustments to the direction of the backrest and the contact surface with the back during use, and furthermore allows the position to be freely adjusted during use.

[0024] The first means of the present invention for solving the above problems is a shoulder belt auxiliary for a backpack, rucksack, or pack, which comprises a cylindrical body with a cavity in the center of the shaft, and one or more belt-like or string-like fasteners for the shoulder belt of the backpack, rucksack, or pack that penetrate the cavity of the cylindrical body and protrude from both ends, and both ends of the fastener are provided with fastening means for the shoulder belt. The fastening means hold and fasten the shoulder belt auxiliary to the shoulder belt of the backpack, rucksack, or pack so that the shoulder belt auxiliary can move along the shoulder belt.

[0025] The second means of the present invention for solving the above problems is a shoulder belt auxiliary device for a school bag, rucksack, or pack as described in the first means of the present invention, characterized in that the cylindrical body or the surface layer of the cylindrical body is made of a flexible material such as a foamable resin composition such as foamed urethane, foamed polystyrene, or foamed rubber, or a rubber or soft resin composition.

[0026] The third means of the present invention for solving the above problems is a shoulder belt auxiliary device for a school bag, rucksack, or pack described in the first or second means of the present invention, characterized in that the tubular body has the shape of a cylinder or a polygonal prism having a square or higher side.

[0027] The fourth means of the present invention for solving the above problems is a shoulder belt auxiliary for school bags, rucksacks, and packs according to the first to third means of the present invention, characterized in that the fastener has an elastic material which is flat elastic, woven elastic, knitted elastic, elastic, elastic cord, springs, and / or combinations thereof.

[0028] The fifth means of the present invention for solving the above problems is a shoulder belt auxiliary for a backpack, rucksack or pack as described in the first to fourth means of the present invention, characterized in that the fastening means is equipped with a hook-and-loop fastener, a carabiner, a buckle, a feed ring, a square ring and / or a clip.

[0029] The sixth means of the present invention for solving the above problems is a shoulder belt auxiliary for a school bag, rucksack or pack as described in the first to fifth means of the present invention, characterized in that a retaining means which is a feed ring, a square ring and / or a clip is provided in a portion which penetrates the hollow of the cylindrical body of the fastener and protrudes at both ends. Effect of the Invention

[0030] The shoulder belt auxiliary device for school bags, rucksacks and packs of this invention comprises a cylindrical body with a cavity in the center of the axis, and one or more band-like or string-like fasteners for the shoulder belt of the school bag, rucksack or pack that penetrate the cavity of the cylindrical body and protrude to both ends, and both ends of the fasteners are equipped with fastening means for the shoulder belt, which hold the shoulder belt auxiliary device on the shoulder belt so that it can move along the shoulder belt of the school bag, rucksack or pack.

[0031] Therefore, even if the user is wearing a backpack, pack or school bag containing luggage, the user can move the shoulder belt auxiliary device by rotating the cylindrical body and / or sliding the fastener from the lower part of the shoulder belts on both shoulders to the upper part so as to insert the shoulder belt auxiliary device between the back part of the backpack, backpack or school bag and the user's back. Because the cylindrical body can be rotated, it is easy to move, and the position can be freely adjusted during use without removing the backpack, pack or school bag.

[0032] And because a space is secured between the back part of the backpack, rucksack or pack and the lower part of the user's back, it is possible to prevent most of the back part of the backpack, rucksack or pack from being in close contact with the entire surface of the user's back. As a result, the back part of the backpack, rucksack or pack does not come into close contact with the user's back, causing an uncomfortable state due to the inability of sweat to evaporate in time, and a certain degree of breathability is maintained, reducing discomfort.

[0033] In addition, when the shoulder belt auxiliary device for school bags, rucksacks and packs of the present invention is used so that it is held between the back part of the school bag, rucksack or pack and the lower part of the user's back, the center of gravity of the school bag, rucksack or pack moves upward, and the weight of the school bag, rucksack or pack containing luggage is appropriately distributed to the shoulders, the upper part of the back and the lower part of the back where the cylindrical body of the shoulder belt auxiliary device comes into contact, reducing the burden on the user and preventing the shoulder belts from being shifted backwards or slung over the shoulders in order to reduce the load, which is also effective in improving the user's posture.

[0034] Furthermore, the shoulder belt support device for school bags, rucksacks, and packs of the present invention is not used to connect and fix both shoulder belts at the chest so as to straddle the front of the body, but is used to be held between the back part of the school bag, rucksack, and pack and the lower part of the user's back. Therefore, even if the school bag, rucksack, or pack is pulled from behind, from the left or right, or gets caught on something, the distance between the two shoulder belts spreads appropriately so that it can easily come off the user's shoulder, and there are no concerns about safety or crime prevention. Furthermore, if a hook and loop fastener is used as a fastening means, the hook and loop of the hook and loop fastener will come off the shoulder belt support device even if excessive force is applied, which further increases safety and crime prevention.

[0035] In addition, the shoulder belt auxiliary device for school bags, rucksacks and packs of the present invention is equipped with a fixing means that holds the shoulder belt auxiliary device movably on the shoulder belt of the school bag, rucksack or pack, so that after use the shoulder belt auxiliary device can slide down the shoulder belt or can be easily moved to the bottom of the shoulder belt. By moving it to that position, it is possible to reduce the shock when the school bag is placed on a desk or floor and to prevent damage to the lower lock and daruma ring. [Brief description of the drawings]

[0036] [Figure 1]Fig. 1 is an explanatory diagram showing an example of a tubular body of a shoulder belt auxiliary for a backpack, rucksack, or pack according to the present invention, in which (a) is a front view, (b) is a rear view, (c) is a left side view, (d) is a right side view, (e) is a plan view, and (f) is a bottom view. [Diagram 2] Fig. 2 is an explanatory diagram showing an example of a fixing device for a shoulder belt auxiliary device for a backpack, rucksack, or pack according to the present invention, in which (a) is a front view, (b) is a rear view, (c) is a left side view, (d) is a right side view, (e) is a plan view, and (f) is a bottom view. [Diagram 3] Fig. 3 is an explanatory diagram showing an example of a retaining means of a shoulder belt auxiliary device for a backpack, rucksack, or pack according to the present invention, in which (a) is a front view, (b) is a rear view, (c) is a left side view, (d) is a right side view, (e) is a plan view, and (f) is a bottom view. [Figure 4] Fig. 4 is an explanatory diagram showing an example of a shoulder belt auxiliary device for a backpack, rucksack, or pack according to the present invention. [Diagram 5] FIG. 5 is an explanatory diagram showing an example of a shoulder belt auxiliary for a backpack, rucksack, or pack according to the present invention in use. [Figure 6] Fig. 6 is an explanatory diagram showing an example of the use of the shoulder belt auxiliary device for school bags, rucksacks, and packs of the present invention. (a) shows the use state when the shoulder belt auxiliary device is attached to the school bag and the school bag is carried on the back. (b) shows the use state when the shoulder belt auxiliary device is attached to the school bag and the school bag is placed on the floor. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a shoulder belt auxiliary for a backpack, rucksack, or pack of the present invention will be described below with reference to the drawings.

[0038] <About shoulder belt support> The shoulder belt auxiliary (1) for school bags, rucksacks, and packs of this invention has a cylindrical body (2) with a cavity (2a) in the center of the shaft, and fasteners (3) for fastening to the shoulder belt of the school bag, rucksack, or pack, which penetrate the cavity of the cylindrical body and protrude on both ends. Since the cylindrical body has a cavity (2a) in the center of the shaft, the fasteners (3) are disposed so as to penetrate the cavity and protrude on both ends. Therefore, the cylindrical body can freely rotate around the fasteners.

[0039] The cylindrical body may have a cylindrical shape or a polygonal prism having a square or higher side. If the cylindrical body has a cylindrical shape or a polygonal prism having a square or higher side, it can be freely rotated around the fixing device as an axis.

[0040] The shoulder belt auxiliary of the present invention for a backpack, rucksack, or pack with such a structure can be moved up or down by rotating the cylindrical body and / or sliding the fastener when moving the shoulder belt from bottom to top or from top to bottom. Therefore, even if the backpack, pack, or backpack is still attached, the position can be freely adjusted.

[0041] The cylindrical body (2) or the surface layer of the cylindrical body (2) is made of a flexible material. Examples of the flexible material include foamable resin compositions such as urethane foam, polystyrene foam, and foamed rubber, and elastic rubbers and soft resin compositions such as silicone rubber, synthetic rubber, and natural rubber. These materials may be colored by further mixing coloring materials such as dyes and pigments. They may also contain other components such as antibacterial agents. Since the material is used to be held between the back part of a school bag, rucksack, or pack and the lower part of the user's back, the use of the flexible material makes it softer against the user's back, improving the feeling of use.

[0042] The fastener (3) may be in the shape of a band or a string. The fastener may be composed of one piece or multiple pieces. The fastener (3) may be made of a stretchable material such as flat elastic, woven elastic, knitted elastic, elastic, elastic string, spring, or a combination of these stretchable materials.

[0043] Both ends of the fastener are provided with fastening means (4) for fastening to the shoulder belt. The fastening means hold and fasten the shoulder belt auxiliary device to the shoulder belt of a backpack, rucksack, or pack so that the shoulder belt auxiliary device can move along the shoulder belt. The fastening means (4) can include a hook-and-loop fastener, a carabiner, a buckle, a feed ring, a square ring, and / or a clip.

[0044] The above-mentioned fixing means can fix the shoulder belt auxiliary device to the shoulder belt of the backpack, rucksack, or pack so that the shoulder belt auxiliary device can be freely moved up and down on the shoulder belt of the backpack, rucksack, or pack. Therefore, even if the user is wearing the backpack, pack, or backpack containing luggage, the user can slide the fixing device from below to above the shoulder belts on both shoulders so that the shoulder belt auxiliary device is inserted between the back part of the backpack, rucksack, or pack and the user's back.

[0045] When a hook-and-loop fastener is used, a fastener (3) for fastening to the shoulder belt of a backpack, rucksack or pack, which penetrates the hollow of the cylindrical body and protrudes from both ends, is used which has a surface with hook-and-loop fastener hooks on one protruding part and a surface with hook-and-loop fastener loops on the other protruding part, and the two fasteners are arranged alternately to penetrate the hollow in the axial center of the cylindrical body.

[0046] When in use, the hook-and-loop fastener hook-and-loop fastener hook-and-loop fastener loop-and-loop fastener hook-and-loop fasteners are wrapped around the shoulder belt of a backpack, rucksack or pack, and the hook-and-loop fastener hook-and-loop fasteners are engaged with the hook-and-loop fastener hook-and-loop fastener loop-and-loop fasteners arranged alternately on the hook-and-loop fastener ...

[0047] By using a hook-and-loop fastener as the fastening means, even if excessive force is applied, the hook and loop of the hook-and-loop fastener will come loose and the shoulder belt auxiliary will come off the shoulder belt, further improving safety and crime prevention.

[0048] The fixing device may be provided with a holding means (6) such as a feed ring, a square ring and / or a clip at the portion that penetrates the hollow of the cylindrical body and protrudes at both ends, thereby allowing the fixing device that penetrates the hollow of the cylindrical body and protrudes at both ends to be stably held on the cylindrical body.

[0049] <How to use> An example of how to use the shoulder belt auxiliary device for school bags, rucksacks, and packs of this invention is shown below.

[0050] 1. A cylindrical body (2) with a cavity (2a) in the center of the axis, two fasteners (3) each having a surface with a hook of a hook-and-loop fastener as a fastening means (4) to a shoulder belt on one side that protrudes through the cavity of the cylindrical body and a surface with a loop of a hook-and-loop fastener as a fastening means (4) to a shoulder belt on the other protruding part, and two holding means (6) which are feed cans are prepared (see Figures 1 to 3). 2. The fastener is placed in the hollow of the cylindrical body so that the surface having the loops and the surface having the hooks of the hook-and-loop fastener alternately penetrate the hollow of the axial center of the cylindrical body, and the fastener is fixed with a retaining means, which is a feed can, to assemble the shoulder belt auxiliary device (1) of the present invention (see Figure 4). 3. The hook-and-loop surface (4a) and hook-and-loop surface (4b) of the fastener, which is disposed so as to penetrate the hollow at the center of the axis of the cylindrical body, are wrapped around one shoulder belt (6a) of the school bag (6) to form a round loop, and are engaged with each other, and fixed so as to be held movably on the shoulder belt. Similarly, the hook-and-loop fastener of the fastener, which is disposed so as to penetrate the hollow at the center of the axis of the cylindrical body, is wrapped around the other shoulder belt (6a) of the school bag (6) to form a round loop, and are engaged with each other, and fixed so as to be held movably on the shoulder belt. In this way, the shoulder belt auxiliary device (1) is disposed so as to be held movably on both shoulder belts of the school bag (see Figures 5 and 6). 4. Make sure that the shoulder belt auxiliary device (1) is moved under the shoulder belt (6a) of the school bag (6), then put the school bag on. 5. The shoulder belt auxiliary device (1) is raised appropriately so that it is sandwiched between the back and the rear part of the school bag, and used while leaving a gap below the back and the rear part of the school bag (see Figure 6 (a)). 6. When not in use, place the seatbelt in a lowered position below the shoulder belt (see Figure 6(b)). EXAMPLES

[0051] The following examples show how the shoulder belt auxiliary device for backpacks, rucksacks, and packs of the present invention is manufactured and used. The present invention is not limited to these examples.

[0052] We manufactured shoulder belt support devices for backpacks, rucksacks, and packs (Figs. 4 and 5) using the present invention.

[0053] In the shoulder belt auxiliary device of the embodiment, the cylindrical body (2) is 230 mm long, 63 mm in diameter, and the diameter of the cavity at the center of the shaft is 20 mm (Fig. 1). The fixing device (3) is a woven rubber piece 440 mm long and 25 mm wide, and at the end of the woven rubber piece, a hook and loop surface of a hook and loop fastener 90 mm long and 20 mm wide is arranged alternately on the front and back sides as fixing means (4) (Fig. 2). The holding means is a 25 mm wide feed can capable of fixing a 25 mm woven rubber piece (Fig. 3).

[0054] After stacking two hook-and-loop fasteners of woven rubber that will be the fastening means (4) so ​​that the hook and loop surfaces do not come into contact, the fasteners consisting of two woven rubbers are arranged so that they penetrate the hollow in the axial center of the cylindrical body and protrude from both ends. Next, feed cans are fitted into the ends of the protruding woven rubbers, and they are held near the exit of the hollow (2a) in the axial center of the cylindrical body (2), completing the shoulder belt auxiliary device (1) for school bags, rucksacks, and packs of the means of this invention (Figure 4).

[0055] <Usage example 1> A shoulder belt support device was used on the school bag.

[0056] The surface having the loop and the surface having the hook of the hook-and-loop fastener of the fastener arranged to penetrate the hollow at the center of the axis of the cylindrical body of the shoulder belt auxiliary device (1) manufactured as described above were wrapped around one of the shoulder belts of the school bag to form a round loop and engaged with each other, and fixed so as to be held movably on the shoulder belt.

[0057] Similarly, the hook-and-loop fastener of the fixture arranged to penetrate the hollow at the center of the axis of the cylindrical body is wound around the other shoulder belt of the school bag to form a round loop, and is engaged with the loop to be fixed so as to be movably held on the shoulder belt.

[0058] The shoulder belt auxiliary device, which was arranged so that it was movably held on both shoulder belts of the school bag, was moved below the shoulder belts to complete the installation work of the shoulder belt auxiliary device on the school bag (Figure 6).

[0059] In a room with the room temperature set to 30°C, a subject with a height of 110 cm wore a school bag with the shoulder belt support attached. Even while wearing the school bag, the subject was able to easily raise the shoulder belt support upward so that it was sandwiched between the back and the back of the school bag, creating a gap below the back and the back of the school bag. It was confirmed that even after 30 minutes, the body surface temperature of the back did not rise excessively, and no discomfort due to sweat occurred.

[0060] Furthermore, it was found that by creating a slight breeze to create a slight air flow at the back of the backpack, moisture evaporates from the back, maintaining a more comfortable environment.

[0061] In addition, even when a test subject who is 150 cm tall carries a school bag equipped with a shoulder belt auxiliary device, the position of the shoulder belt auxiliary device (1) can be easily adjusted by lifting it upward so that it is sandwiched between the back and the back part of the school bag, even while the school bag is still on, and a gap can be created below between the back and the back part of the school bag, and no discomfort due to sweat occurs.

[0062] On the other hand, when the shoulder belt support was lowered to the lowest position, the same as when the shoulder belt support was not being used, the back of the school bag was in close contact with the back, and it was confirmed that within five minutes the surface temperature of the back rose, causing sweating and discomfort.

[0063] Next, the same test was conducted with the backpack loaded with books to increase its weight by 5 kg; however, even when used for long periods of time, the surface temperature of the back did not rise excessively, and no discomfort due to sweat occurred.

[0064] It was confirmed that by lifting the shoulder belt support device upward so that it is sandwiched between the back and the rear part of the school bag, creating a gap below the back and the rear part of the school bag, the center of gravity of the school bag is raised and the load on the shoulder belt is reduced, preventing the distance between the shoulder belts from becoming excessively wide and allowing the school bag to be carried comfortably with good posture.

[0065] Furthermore, it was confirmed that when the school bag is pulled from behind or from the left or right, the fixing device, which is made of a hook-and-loop fastener that is wrapped around the shoulder belt to form a round loop, moves downward on the shoulder belt, causing the space between the shoulder belts to expand to the left and right and becoming detached from the user's shoulders, ensuring safety.

[0066] On the other hand, when a device that was designed to completely fasten the backpack to the shoulder straps was used instead of the hook-and-loop fastener, there were cases where the subject fell over without the backpack coming off their shoulder. [Industrial Applicability]

[0067] The means of the present invention are useful for providing a shoulder belt auxiliary for a backpack, rucksack, or pack with a new structure that prevents the back of the backpack or pack from coming into close contact with the user's back, preventing sweat from evaporating in time and causing discomfort even when the width between the two shoulder straps is restricted to a certain range, does not require fine adjustment of the direction of the backrest and the contact surface with the back during use, and further allows for free position adjustment during use. The means of the present invention also contributes to the fact that even if the backpack, rucksack, or pack is pulled from behind or from the left or right, or gets caught on something, the shoulder belts on both shoulders are easily removed from the user's shoulders, eliminating safety and crime prevention concerns. Furthermore, the means of the present invention also contributes to the provision of a shoulder belt auxiliary for a backpack, rucksack, or pack with a new structure that reduces the shock when the backpack is placed on a desk or floor and prevents the lower lock and the daruma ring from being destroyed. [Explanation of symbols]

[0068] 1 Shoulder belt support 2. Cylindrical body 2a cavity 3 Fixtures 4 Fastening means (hook and loop fastener) 4a Fixing means (surface having hook-and-loop fastener) 4b Fixing means (surface having hooks of hook-and-loop fastener) 5 Holding means 6 School bag 6a Shoulder belt

Claims

1. The present invention has a cylindrical body having a hollow center in the shape of a cylinder or a polygonal prism having a square or higher polygonal prism, and one or more belt-like or string-like fasteners for attaching to a shoulder belt of a backpack, rucksack, or pack, the fasteners penetrating the hollow center of the cylindrical body and protruding from both ends, The cylindrical body or a surface layer of the cylindrical body has a flexible material which is a foamable resin composition such as urethane foam, polystyrene foam, or rubber foam, or a rubber or soft resin composition, The fastener has a stretchable material that is a flat elastic band, a woven elastic band, a knitted elastic band, a rubber band, an elastic cord, a spring, and / or a combination thereof; The shoulder belt auxiliary for a school bag, rucksack or pack is characterized in that both ends of the fastener are provided with fastening means which are a hook-and-loop fastener, a carabiner, a buckle, a feed ring, a square ring and / or a clip, which can be attached to and detached from the shoulder belt and can be moved along the shoulder belt.

2. 2. The shoulder belt auxiliary for a school bag, rucksack or pack as described in claim 1, characterized in that the retaining means, which is a feed ring, a square ring and / or a clip, is provided at a portion that penetrates the hollow of the cylindrical body of the fastener and protrudes at both ends.

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