Patent ID: 12185823

DETAILED DESCRIPTION OF THE INVENTION

Backpacks according to a first embodiment, a second embodiment and a plurality of modifications of the present invention will be hereinafter described with reference to the accompanying drawings. The same or similar reference numerals are applied to the same or similar parts and elements throughout the drawings. However, the drawings are merely schematic, and attention should be paid to a fact that the ratio of the sizes and the like of each part in the drawings differ from real data of the real products.

Therefore, the specific sizes of the specific storage-compartment, back plate, shoulder strap, etc., should be determined by considering the following explanation. Also, in the same part, it is natural that even between mutual drawings, the portions in which the relations and ratios between the mutual dimensions are different are included. Furthermore, backpacks according to the first embodiment, the second embodiment and the plurality of modifications described below are examples of structures or manufacturing methods of products or goods for realizing the technical idea of the present invention, and the technical idea of the present invention is not specified the quality of the material, form, contexture, arrangement, etc., of component parts as the following. Various changes can be added to the technical idea of the present invention scope indicated to the claims.

First Embodiment

As illustrated inFIG.1, a backpack1according to a first embodiment of the present invention encompasses a box-shaped storage-compartment3and a back plate5which supports the storage-compartment3configured to be removable from the storage-compartment3. The storage-compartment3has a box-shaped structure implemented by first and second main surfaces opposite to each other, and triple side-surfaces. The triple side-surfaces connect triple continuous sides defined to the first main surface and the counterpart triple continuous sides assigned to the second main surface opposite to the triple continuous sides of the first main surface. The back plate5has a plate-shaped structure, and has a joint plane opposite to the first main surface and a backrest plane (backside-surface) opposite to and parallel with the joint plane. The back plate5has a pair of shoulder straps (51a,51b), which bridges from an upper portion of the backrest plane of the back plate5to double sites located at a lower portion of the backrest plane. For example, the pair of shoulder straps (51a,51b) can establish a configuration spreading from a site around a center of the upper portion of the backrest plane toward double sites located at left and right sides of the lower portion of the backrest plane, by connecting between the site around the center of the upper portion of the backrest plane of the back plate5and the sites at the left and right sides of the lower portion of the backrest plane. Further, the pair of shoulder straps (51a,51b) may establish a cross-topology or an almost parallel topology, by bridging to intersect or in parallel from double sites at the upper portion of the backrest plane toward the double sites at the lower portion of the backrest plane.

Specifically, as illustrated inFIG.1, the first shoulder strap51amay include a first shoulder belt56awhich is connected to the upper portion of the back plate5, a first lower belt57awhich is connected to the site located at the lower portion of the back plate5, and a first fastener58a. The first fastener58aconnects the first shoulder belt56aand the first lower belt57ato each other. Similarly, the second shoulder strap51bmay include a second shoulder belt56bwhich is connected to the upper portion of the back plate5, a second lower belt57bwhich is connected to the site located at the lower portion of the back plate5, and a second fastener58b. The second fastener58bconnects the second shoulder belt56band the second lower belt57bto each other. One of the lengths of the shoulder belts56a,56bor the lengths of the lower belts57a,57bmay be set to be adjustable by the fasteners58a,58b, or alternatively, both lengths of the shoulder belts56a,56band the lower belts57a,57bmay be adjusted by the fasteners58a,58b, when using the fasteners58a,58b. The lower belts57a,57bmay be given a freedom of movements, by providing round-shaped attachments, such as daruma-rings, at the connection portions between the lower belts57a,57band the counterpart double sites located at the lower portion of the back plate5.

Furthermore, various back-rings may be provided at the connection portion between the upper portion of the back plate5and the first shoulder belt56a, and the connection portion between the upper portion of the back plate5and the second shoulder belt56b. In addition, connections of the first shoulder belt56aand the second shoulder belt56bto the back plate5may be achieved by sewing method, configured to sew the first shoulder belt56aand the second shoulder belt56brespectively on the back plate5, and may be achieved by adhering method with adhesives, etc. In the storage-compartment3, as illustrated inFIG.1, the first main surface shall indicate a surface on which the pedestal32is attached, and the first main surface is a surface opposite to the joint plane of the back plate5. The first main surface has a rectangle shape inFIG.1and has the same shape to the second main surface whose illustration is omitted inFIG.1. Although the joint plane is not illustrated inFIG.1as the joint plane is located at the backside of the back plate5, the cross-sectional views of the joint plane, which is opposite to the first main surface of the storage-compartment3, and the backrest plane which is parallelly opposite to the joint plane are illustrated inFIG.4. The backrest plane illustrated inFIG.1is sketched as a main surface disposed at near and right side of the paper, and an insertion hole54is illustrated in the main surface, cutting and penetrating the backrest plane. A backrest cushion pad53is located on the backrest plane according to the representation illustrated inFIG.1.

The storage-compartment3is a principal body which stores goods as carrying objects of the backpack1, and has quadruple side-surfaces in addition to the first and second main surfaces. One of the quadruple side-surfaces is a bottom surface (bottom) of the storage-compartment3, and an opposed side-surface disposed opposite to the bottom surface, among the quadruple side-surfaces, implements a top flap serving as a covering piece of the storage-compartment3. Strictly speaking, as it is clear fromFIG.1, the top flap as the covering piece of the storage-compartment3has a side-surface opposite to the bottom, as the covering main portion. And the top flap encompasses a part of two side-surfaces continuously connected with the side-surface as the covering main portion, and a portion of an upper side of the second main surface. Therefore, the second main surface, a part of the triple side-surfaces, a lower part of the first main surface implement “the principal body” of a box-shape, when considering a structure of the backpack1, which is separated into “the principal body” and “the covering piece”. Here, the part of the triple side-surfaces includes triple pieces of surfaces which mutually connect at least one part of the triple continuous sides of the first main surface with at least one part of the triple continuous sides of the second main surface opposite to the triple sides of the first main surface.

However, a scheme of separating “the principal body” and “the covering piece” inFIG.1is merely one example of the structure of the backpack, it should be noted that it is possible to change a relationship between “the principal body” and “the covering piece”, which implement the backpack1, variously. For example, the covering piece may be provided on the bottom side of the backpack1, and furthermore, the covering piece may have a structure with a first covering piece of the upper side of the backpack1and a second covering piece of the bottom side of the backpack1. Still furthermore, the covering piece may be provided on the side-surface which is parallel with the gravitational vertical direction, or alternatively, the covering piece may be provided on the second main surface.

Returning to the structure example illustrated inFIG.1, the rectangle shaped pedestal32is disposed at the upper side along the center of the first main surface of the storage-compartment3, and a convex element (first convex element)6having a cylindrical shape, for combining the storage-compartment3with the back plate5, is provided on the rectangle shaped pedestal32. The insertion hole (first insertion hole)54scheduled to be inserted by the convex element6is provided in the joint plane of the back plate5, corresponding to the location and the size of the convex element6. As illustrated inFIG.16, the insertion hole54is cut from the joint plane to the backrest plane, passing through the back plate5. With respect to the inner diameter of the insertion hole54, an inner diameter at the joint plane is smaller than an inner diameter measured at a level of a stepped inner recess in the backrest plane side. Therefore, as illustrated inFIG.2BandFIG.16, the insertion hole54is a hole having a stepped inner structure at a shallow position near the backrest plane, when viewed from the backrest plane side. As illustrated inFIG.4, the backpack1according to the first embodiment encompasses a fixing lid (first fixing lid)52as “the fixing mechanism (first fixing mechanism)” which fixes the convex element6to the back plate5. The fixing lid52has a cap-like (hat-like) circular shape and can be connected to the end piece of the convex element6removably. And the fixing lid52cannot pass through the insertion hole54because the periphery of the fixing lid (cap)52has an outer diameter which is larger than the inner diameter of the insertion hole54at the joint plane. It is preferable that the outer diameter of the periphery of the fixing lid (cap)52is almost equal to the inner diameter of the stepped inner recess provided at the shallow position of the insertion hole54near the backrest plane, such that the outer diameter facilitate a fitting of the fixing lid into the stepped inner recess with close tolerance. The storage-compartment3having the convex element6is fixed to the back plate5, by combining the end piece of the convex element6with the back plate5, after cylindrically covering the end piece of the convex element6with the side crown of the cap, implementing the fixing lid52, from the backrest plane side.

Hereafter, some examples of the fixing methods for fixing the storage-compartment3to the back plate5are described below. As guessed fromFIG.4, a method is possible that a screw thread of a male screw is provided on the periphery surface of the pillar which implements the convex element6, and the cap-like fixing lid52is screwed onto the end piece of the convex element6. To realize the screwing scheme, the fixing lid52need to have a groove of a female screw, corresponding to the screw thread of the male screw of the convex element6, inside the side crown of the cap of the fixing lid52. And the side crown of the fixing lid52is fixed, by rotating the screw, which is provided in the side crown, around the end piece of the convex element6, when combining the fixing lid52with the end piece of the convex element6, and fixing the convex element6to the back plate5from the backrest plane side. As illustrated inFIG.3, also when separating the storage-compartment3from a state in which the storage-compartment3is fixed to the back plate5, the separating process (detachment process), namely, the reverse procedure against the fixing process (attachment process) can be executed. That is, it is possible that the fixing lid52is detached by rotating the fixing lid52in a detaching direction, the convex element6is pulled out from the insertion hole54, and the storage-compartment3is separated from the back plate5. In the other embodiments and the other modifications, when a storage-compartment or a back plate encompasses a convex element, the storage-compartment can be attached to or detached from the back plate in the same operation by using the material with the same mechanism as above.

Also, as the other method of fixing the storage-compartment3to the back plate5, it is possible to fix the storage-compartment3to the back plate5by using the frictional force generated between the convex element6and the fixing lid52, instead of providing the screw thread and the groove. Also, without using the mere frictional force, by providing a ring-shaped (O-ring shaped) protruding portion on the peripheral surface of the convex element6, and by providing a ring-shaped concave, which conforms to the ring-shaped protruding portion, in the inner diameter side of the fixing lid52, the concave and the protruding portion may be fitted each other using the elastic force. Furthermore, as the other method of fixing the storage-compartment3to the back plate5, it is possible to employ magnetically susceptible materials which couple with each other by the magnetic force, such as metallic materials, as the materials for convex element6and the fixing lid52, and then the storage-compartment3and the back plate5are connected each other by the magnetic force.

Because the backrest cushion pad53located on the backrest plane of the back plate5illustrated inFIG.3andFIG.4has cushion-like functions, it is possible to hook or claw one's finger, etc., to the fixing lid52when detaching the fixing lid52, by denting and concaving a peripheral portion of the backrest cushion pad53around the fixing lid52, after pushing the peripheral portion of the insertion hole54with one's finger, etc. In the above mechanism for denting and concaving the peripheral portion of the backrest cushion pad53, as illustrated inFIG.3andFIG.4, it is easily applicable to the case of having no space between the side crown of the fixing lid52and the insertion hole54. Of course, it is possible to facilitate hooking one's finger and the like at the time of detaching the fixing lid52, by a clearance of about one to five millimeters set between the side crown of the fixing lid52and the insertion hole54. Also, the clearance of about one to five millimeters makes it easy to hold the fixing lid52with one's finger, etc. and to detach, when the detachment of the fixing lid52.

Also, regarding the circular head portion of the fixing lid52, instead of the flat shape as illustrated inFIG.3, etc., it is possible to accept a shape with a groove and roughness. It is possible to facilitate detachment when the groove and roughness are provided on the head portion of the fixing lid52, because it is easy to hook one's finger and the like. For example, a circular groove with a diameter smaller than the cap-like peripheral portion of the fixing lid52may be provided on a central area of the head portion of the fixing lid52, and so on. Furthermore, a peripheral edge of the head portion of the fixing lid52may be beveled so that a valley can be established at a boundary between the fixing lid52and the insertion hole54. Anyway, because the head portion of the fixing lid52may be contacted directly on the user's back, it is preferable that the head portion of the fixing lid52does not cause user a discomfort and uneasiness on user's back. Therefore, it is preferable that the head of the fixing lid52is not a large protrusion.

It is preferable that the convex element6has such a height which is exactly settled in the insertion hole54without projecting from a surface level of the extension surface of the backrest plane, when inserting the convex element6to the insertion hole54. And, as to the fixing lid52, it is preferable that the fixing lid52does not project from the surface level of the extension surface of the backrest plane, when the convex element6passes through the insertion hole54and the fixing lid52is connected to the end piece of the convex element6. InFIG.1, although the backrest cushion pad53is located at the backrest plane, it is preferable that the fixing lid52does not project from the backrest cushion pad53as illustrated in a cross-sectional view ofFIG.4. As another structural example that the fixing lid52does not project from the surface level of the extension surface of the backrest plane, the back plate5aaccording to the other modification of the first embodiment encompasses a stepped inner recess, for installing the side crown of the fixing lid52in the inner diameter of the insertion hole54, provided at a location deeper than the bottom level of the backrest cushion pad53.

When a material of the fixing lid52is a metal with a poor corrosion resistance, such as iron, there is some possibility of generating a rust, and therefore, there is some possibility of getting the user's clothes, etc. dirty, when the rusted fixing lid52is used. So, the material of the fixing lid52must be non-rusty material, and is preferable to be reinforced plastic, stainless steel, titanium, etc. The same is true of the convex element6connected to the fixing lid52.

Regarding the location of the convex element6in a gravitational vertical direction—upper and lower directions—, as illustrated inFIG.1, etc., it is preferable that the convex element6is located at a position in a range of upper half of the first main surface from a viewpoint of a loading stability at the time of storing some contents in the storage-compartment3. For example, it is preferable that the storage-compartment3can keep a balance and a loading stability, even if the contents with maximum weight is stored in the storage-compartment3. Also, similarly, from a viewpoint of the loading stability, it is preferable that the location of the convex element6in a horizontal direction is a center of a width of the first main surface.

As illustrated inFIGS.2A and2B, the back plate5of the backpack1according to the first embodiment has the pedestal-storing depression55for storing and fixing the rectangle-shaped pedestal32on the joint plane. InFIG.1,FIGS.2A and2B, etc., the pedestal-storing depression55is a rectangle-shaped concave having almost the same shape as the contour of the pedestal32. The generation of rotary motion around the convex element6can be prevented, and, the storage-compartment3and the back plate5can be combined, by fitting the rectangle-shaped pedestal32in an inner space of the rectangle-shaped pedestal-storing depression55. As illustrated inFIG.3andFIG.4, the rattling can be reduced, when using the backpack1combining the storage-compartment3with the back plate5, by setting an inner size including a size of the inner diameter of the insertion hole54of the pedestal-storing depression55almost equal to an outer size of the outer diameter, etc., of the convex element6. However, it is natural that a predetermined clearance of one to three millimeters is provided between the pedestal-storing depression55and the pedestal32, for facilitating the attachment and detachment of the storage-compartment3and the back plate5each other. Here, the pedestal-storing depression55is a blind hollow and does not pass through to the backrest plane55, for preventing uncomfortable carrying of the back plate5on the user's back. Therefore, as illustrated inFIG.2B, when viewing the back plate5from the backrest plane side, the pedestal-storing depression55is out of sight, but only the first shoulder strap51a, the second shoulder strap51b, the backrest cushion pad53and the insertion hole54with the stepped recess can be in sight.

Regarding the shape of the pedestal32and the pedestal-storing depression55, some shapes other than the rectangle-shape are applicable, except a perfect circle. For example, the pedestal32may have a triangle-shape, an elliptical shape, a star-like shape, etc., and the pedestal-storing depression55also may have a shape corresponding to the shape of the pedestal32. That is, any shapes are applicable unless the rattling and the rotation of the pedestal32occurs when the pedestal32is fitted in the pedestal-storing depression55.

As the material of the pedestal32, it is preferable that the pedestal32is made of stainless steel from a viewpoint of corrosion resistance, and that the pedestal32is made of titanium (Ti) or a titanium alloy from a viewpoint of corrosion resistance and a weight saving. As a material of the pedestal32, a metal with poor corrosion resistance, such as iron (Fe), is not preferable, because there is some possibility of generating a rust. Moreover, the pedestal32, and the convex element6of the center of the pedestal32may be integrated by molding. Or the pedestal32and the convex element6may be constructed as the different components. In the case that the pedestal32and the convex element6are implemented by different components, a method of opening quadruple insertion holes at the quadruple corners of the convex element6, respectively, and fixing the convex element6to the pedestal32, by passing through the screws into the quadruple insertion holes, is applicable. When the pedestal32and the convex element6are designed to be implemented by different components, it is preferable to give the users the freedoms of choice, so that the users can select materials, colors, etc., of the convex element6and pedestal32optionally, and can enjoy the selection of components.

As illustrated inFIG.3, the backpack1encompasses the first shoulder strap51aand the second shoulder strap51bas the members for putting through both arms of the user, when the user carries the backpack1according to the first embodiment in a state of combining the storage-compartment3with the back plate5. It is preferable that the material of the back plate5is a polycarbonate material, a carbon fiber material, aluminum (Al), a titanium material, etc., in order to make the back plate5lightweight. Also, the back plate5may be a member having a cavity component, if the strength during use can be kept enough. In the backpack1of the first embodiment, the backrest cushion pad53is provided to the back plate5so that the fixing lid52does not directly touch user's body too much when the user carries the backpack1, therefore, a thickness is given to the backrest cushion pad53so that an enough elasticity—or an enough cushioning characteristic—can be achieved. The shape of the backrest cushion pad53may be an order-made shape with various rounded planes, or uneven planes corresponding to the user's shapes of backs. As a result, it is possible to realize the backpack1being more suitable for the personal body shape, and to realize the effect that the physical burden of the user can be reduced. As the buffer materials of the backrest cushion pad53, in the composite structure of a skin layer or inside layers, polyethylene is preferable, because the polyethylene has an excellent air-permeability, drying sweat quickly, and therefore, the effectiveness that the backrest cushion pad53can keep user comfortable is achieved.

Also, assuming a case of getting wet by sweat, rain, etc., regarding the materials of the first shoulder strap51aand the second shoulder strap51b, hygroscopic quick-drying polyethylene is suitable. Instead of polyethylene, the first shoulder strap51aand the second shoulder strap51bcan be made of synthetic leather or real leather from the aspect of beauty. Furthermore, the first shoulder strap51aand the second shoulder strap51bmay further include chest straps or waist belts. By adding the chest straps or the waist belts to the backpack1according to the first embodiment, the advantageous effects such that the loading stability of the backpack1is improved more, and therefore, the fatigue of the user is reduced more, compared with a case of carrying the backpack1with only the first shoulder strap51aand only the second shoulder strap51b—two straps only—. Also, when using the backpack1which has fixed the storage-compartment3to the back plate5, the user shall pass the user's both arms through the first shoulder strap51aand the second shoulder strap51b, respectively, and then, shall carry the backpack1on the user's back as in the earlier method for carrying backpack.

In addition, in the backpack1pertaining to the first embodiment, the top handle31, or the handle mechanism of the backpack1, for hanging the backpack1to the hook, etc., of the locker, etc., is provided at a location corresponding to the back ring of the back plate5. Top handle31also can be used when carrying the backpack1without carrying the backpack1on the user's back. Also, according to the purpose of backpack's use, other handle may be provided at the location other than the location of the top handle31illustrating inFIG.1. Furthermore, according to the backpack1pertaining to the first embodiment, by adding the handles, the advantageous effect such that carrying of the backpack1becomes easier can be achieved.

InFIG.1, a part of the fastener33for putting the storing-articles—goods or items to be stored—in the backpack1or out from the backpack1is illustrated at the upper portion of the side-surface of the storage-compartment3. The fastener33of the backpack1according to the first embodiment is constructed so that the upper portion of the storage-compartment3can be opened or closed, by moving the fastener33from a left side-surface toward a right side-surface, which faced to the left side-surface, passing through the second main surface, or alternatively, the upper portion of the storage-compartment3can be opened or closed, by moving the fastener33from a right side-surface toward a left side-surface, which faced to the right side-surface, passing through the second main surface, in the upper portion of the storage-compartment3. The upper portion of the storage-compartment3separated by the fastener33is corresponding to the covering sheet (covering piece) of the school backpack. Also, the fastener33may be provided at the location other than the location illustrated inFIG.1, etc., according to modes of the backpack's use. Furthermore, the member for opening and closing the opening portion may be any element other than the fastener33. It is preferable that the storage-compartment3of the backpack1according to the first embodiment is polycarbonate, a hood material with water resistance, a carbon fiber, polyethylene, etc., for protecting the storing-articles from rain, snow, etc.

Also, regarding the shapes of the storage-compartment3, breaking all the conventional rules or common sense, miscellaneous and various shapes are available to the present invention as long as the location of the convex element6and the location of the back plate5are corresponding to each other. For example, it is possible that the shape of the storage-compartment3is triangular prism. As described above, the applying of the various shapes can cause the effectiveness of expressing the excellent and advanced fashion.

In addition, regarding the inside structure of the storage-compartment3, a partition member, configured to divide an inner volume of the storage-compartment3into the upper portion and the lower portion, may be provided at the arbitrary portion in the inside of the backpack1. Instead of providing such partition member, the backpack1may have a structure that the storing-articles, or the articles to be stored are contained freely in the range of the whole storage space freely. Furthermore, a free adhering structure, in which a surface morphology of the male side is raised hairy in a hook-like configuration and a surface morphology of the female side is raised hairy in a loop-like configuration with high density, can be employed. By the free adhering structure, when the male and female sides are pushed, the surfaces of the male and female sides adhere each other by the pushing only, at the superimposed portion of the male and female sides. And, like the employment of the surface fastener, the free adhering structure may be provided at the both ends of the partition plates and the both sides of the inside of the storage-compartment3, so that the partition plates can be moved freely. Also, it may be able to carry a thin electronic equipment, for example, a tablet personal computer (PC), etc., safely, by using the material with cushioning materials in the inside of the storage-compartment3, by partitioning in a vertical direction of the backpack1.

Furthermore, according to the first embodiment, the effectiveness that the size of the storage-compartment3is exchangeable freely is obtained by preparing a plurality of options of storage-compartments, and by selecting one of the options as the storage-compartment3, which has an arbitrary size among the options, as long as the location of the convex element of the pedestal32in the selected storage-compartment3and the location of the insertion hole54of the back plate5can be mated. For example, in the case of applying the backpack1illustrated inFIG.1to the school backpack for an elementary school student, the school knapsack which has the optimum size can be provided as growing up of the school student, by optionally selecting one option with a desired size among the plurality of options of storage-compartments. That is, if the plurality of options of storage-compartments is prepared enough, the user can select any school knapsack with the desired size as growing up, and therefore, the user can change the storage-compartment3or the back plate5to the other option of storage-compartment3or the other option of back plate5, which matches to the body size of the school student.

According to the backpack1of the first embodiment, the storage-compartment3or the back plate5can be exchanged to the arbitrary storage-compartment or the arbitrary back plate among the plurality of options of storage-compartments or the plurality of options of back plates, by separating the storage-compartment3from the back plate5or by combining the storage-compartment3with the back plate5, if the plurality of options of storage-compartments and the plurality of options of back plates are prepared. Also, another person or anyone else just happen to be the place can exchange the storage-compartment3to the other storage-compartment, while the user is carrying the backpack1according to the first embodiment, if the plurality of options of storage-compartments and the plurality of options of back plates are prepared.

As a result of adoptions of the above structures, the backpack1according to the first embodiment has variety, diverseness and multifariousness in the combination of the storage-compartment3, the back plate5, etc., and the degrees of freedom to select color, shape, etc., increases drastically. The variety of the combination can also bring economic advantages. The backpack1according to the first embodiment is very economical for user, because various situations will be sometimes occurred in user, such that the user is enough to prepare, or purchase either one of a new storage-compartment or a new back plate, when any backpack having a preferred appearance is desired to be owned.

First Modification of First Embodiment

As illustrated inFIG.5, a backpack1000according to a first modification of the first embodiment encompasses a box-shaped storage-compartment2and a back plate4removable from the storage-compartment2. The storage-compartment2has a box-shaped structure implemented by first and second main surfaces opposite to each other, and triple side-surfaces. The triple side-surfaces connects triple continuous sides defined to the first main surface and the counterpart triple continuous sides assigned to the second main surface opposite to the triple continuous sides of the first main surface. The back plate4has a plate-shape structure, and has a joint plane opposite to the first main surface when combining to the storage-compartment2and a backrest plane opposite to the joint plane. The back plate4has a pair of shoulder straps (51a,51b) bridging from an upper portion of the backrest plane to a lower portion of the backrest plane. In the backpack1000according to the first modification, a convex element23is provided on the first main surface, and an insertion hole42having a structure corresponding to the convex element23is provided in the location corresponding to the convex element23on the joint plane. Also, the attachment and the detachment of the storage-compartment2and the back plate4is freely achieved, by passing the convex element23through the insertion hole42and by pulling the convex element23out from the insertion hole42.

In the backpack1000according to the first modification, schemes of combining the elements of the backpack1000, structures, materials and usages of the storage-compartment2and the back plate4, etc., are almost similar to the backpack1recited in the first embodiment. However, as illustrated inFIG.5, the backpack1000according to the first modification is different from the backpack1according to the first embodiment, in the feature that the convex element23of the storage-compartment2has no pedestal. In addition, in the backpack1000according to the first modification, the thickness of the back plate4can be set thinner, because the backpack1000does not encompass an element corresponding to the pedestal-storing depression55of the back plate5of the first embodiment.

As illustrated inFIG.5, a ring-shaped washer24is attached around the convex element23provided on the storage-compartment2. Also, when using the backpack1000according to the first modification, the convex element23is passed through the insertion hole42of the back plate4, and the convex element23is fixed to the back plate4using the fixing lid44. Therefore, as illustrated inFIG.6, after fixing, the storage-compartment2can freely rotate against the back plate4around the axis of the convex element23, because the washer24is intervened between the storage-compartment2and the back plate4. In the case that the user inclines own body while carrying the backpack1000according to the first modification on the back, the storage-compartment2with increased weight by storing goods in the backpack, rotates, and is held so that the lower portion of the storage-compartment2is always located in the vertically downward. In the state that the lower portion of the storage-compartment2is located in the vertically downward, the effectiveness that it becomes easy to put goods out from the storage-compartment2compared with the backpack1according to the first embodiment, is achieved, because the user can reach own hands to the fastener33easily, and there is no problem that the goods in the storage-compartment2jumps out from the backpack1000against the user's will.

According to the backpack1000according to the first modification, similar to the backpack1according to the first embodiment, the storage-compartment2or the back plate4can be exchanged to the arbitrary storage-compartment or the arbitrary back plate among the plurality of options of storage-compartments or the plurality of options of back plates, by separating the storage-compartment2from the back plate4or by combining the storage-compartment2with the back plate4, if the plurality of options of storage-compartments and the plurality of options of back plates are prepared. Also, another person or anyone else just happen to be the place can exchange the storage-compartment2to the other storage-compartment, while the user is carrying the backpack1000according to the first modification, if the plurality of options of storage-compartments and the plurality of options of back plates are prepared. As a result of adoptions of the above structures, similar to the backpack1according to the first embodiment, the backpack1000according to the first modification has variety, diverseness and multifariousness in the combination of the storage-compartment2, the back plate4, etc., and the degrees of freedom to select color, shape, etc., increases drastically. The variety of the combination can also bring economic advantages. The backpack1000according to the first modification is very economical for user, because various situations will be sometimes occurred in user, such that the user is enough to prepare, or purchase either one of a new storage-compartment or a new back plate, when any backpack having a preferred appearance is desired to be owned.

Second Modification of First Embodiment

As illustrated inFIG.7, a backpack2000according to a second modification of the first embodiment encompasses a box-shaped storage-compartment7and a back plate9removable from the storage-compartment7. The storage-compartment7has a box-shaped structure implemented by first and second main surfaces opposite to each other, and triple side-surfaces. The triple side-surfaces connects triple continuous sides defined to the first main surface and the counterpart triple continuous sides assigned to the second main surface opposite to the triple continuous sides of the first main surface. The back plate9has a plate-shape structure, and has a joint plane opposite to the first main surface when combining to the storage-compartment7and a backrest plane opposite to the joint plane. The back plate9has a pair of shoulder straps (51a,51b) bridging from an upper portion of the backrest plane to a lower portion of the backrest plane. In the backpack2000according to the second modification, a first convex element73ais provided on the first main surface, and a first insertion hole93ahaving a structure corresponding to the first convex element73ais provided in the location corresponding to the first convex element73aon the joint plane. In the backpack2000according to the second modification, a second convex element73bis provided on the first main surface, and a second insertion hole93bhaving a structure corresponding to the second convex element73bis provided in the location corresponding to the second convex element73bon the joint plane. Also, the attachment and the detachment of the storage-compartment7and the back plate9is freely achieved, by passing the first convex element73aand the second convex element73bthrough the first insertion hole93aand the second insertion hole93brespectively, and by pulling the first convex element73aand the second convex element73bout from the first insertion hole93aand the second insertion hole93brespectively. Furthermore, the backpack2000encompasses a first fixing lid95aand a second fixing lid95bfor fixing the storage-compartment7to a back plate9.

In the backpack2000according to the second modification, schemes of combining the elements of the backpack2000, structures, materials and usages of the storage-compartment7and the back plate9, etc., are almost similar to the backpack1recited in the first embodiment. However, the backpack2000according to the second modification is different from the backpack1according to the first embodiment, in the feature that the storage-compartment7and the back plate9does not have any pedestals connected with the convex elements and pedestal-storing depressions fitted to the pedestals. In addition, in the backpack2000according to the second modification, the thickness of the back plate9can be set thinner, because the backpack2000does not encompass any elements corresponding to the pedestal-storing depressions.

Moreover, as illustrated inFIG.7andFIG.8, the backpack2000according to the second modification is also different from the backpack1according to the first embodiment, in the feature that the positions for fixing the storage-compartment7and the back plate9are two. Since there are two fixing positions in the backpack2000according to the second modification, the backpack2000according to the second modification has a structure which is enough to withstand vibration or shock generated from user when the user moves, compared with the backpack1recited in the first embodiment. Also, according to the backpack2000of the second modification, the advantageous effect that the storage-compartment7can be fixed more strongly and more stably and the user can feel safe when carrying the backpack2000, is achieved, compared with the backpack1recited in the first embodiment.

According to the backpack2000pertaining to the second modification, similar to the backpack1explained in the first embodiment, the storage-compartment7or the back plate9can be exchanged to the arbitrary storage-compartment or the arbitrary back plate among the plurality of options of storage-compartments or the plurality of options of back plates, by separating the storage-compartment7from the back plate9or by combining the storage-compartment7with the back plate9, if the plurality of options of storage-compartments and the plurality of options of back plates are prepared. Also, another person or anyone else just happen to be the place can exchange the storage-compartment7to the other storage-compartment, while the user is carrying the backpack2000pertaining to the second modification, if the plurality of options of storage-compartments and the plurality of options of back plates are prepared. As a result of adoptions of the above structures, similar to the backpack1explained in the first embodiment, the backpack2000pertaining to the second modification has variety, diverseness and multifariousness in the combination of the storage-compartment7, the back plate9, etc., and the degrees of freedom to select color, shape, etc., increases drastically. The variety of the combination can also bring economic advantages. The backpack2000pertaining to the second modification is very economical for user, because various situations will be sometimes occurred in user, such that the user is enough to prepare, or purchase either one of a new storage-compartment or a new back plate, when any backpack having a preferred appearance is desired to be owned.

Third Modification of First Embodiment

As illustrated inFIG.9, a backpack500according to a third modification of the first embodiment encompasses a box-shaped storage-compartment100and a back plate300removable from the storage-compartment100. The storage-compartment100has a box-shaped structure implemented by first and second main surfaces opposite to each other, and triple side-surfaces. The triple side-surfaces connects triple continuous sides defined to the first main surface and the counterpart triple continuous sides assigned to the second main surface opposite to the triple continuous sides of the first main surface. The back plate300has a plate-shape structure, and has a joint plane opposite to the first main surface when combining to the storage-compartment100and a backrest plane opposite to the joint plane. The back plate300has a pair of shoulder straps (51a,51b) bridging from an upper portion of the backrest plane to a lower portion of the backrest plane. In the backpack500according to the third modification, a first convex element102ais provided on the first main surface, and a first insertion hole302ahaving a structure corresponding to the first convex element102ais provided in the location corresponding to the first convex element102aon the joint plane. In the backpack500according to the third modification, a second convex element102bis provided on the first main surface, and a second insertion hole302bhaving a structure corresponding to the second convex element102bis provided in the location corresponding to the second convex element102bon the joint plane. In the backpack500according to the third modification, a third convex element102cis provided on the first main surface, and a third insertion hole302chaving a structure corresponding to the third convex element102cis provided in the location corresponding to the third convex element102con the joint plane. In the backpack500according to the third modification, a fourth convex element102dis provided on the first main surface, and a fourth insertion hole302dhaving a structure corresponding to the fourth convex element102dis provided in the location corresponding to the fourth convex element102don the joint plane. Also, the attachment and the detachment of the storage-compartment100and the back plate300is freely achieved, by passing the first convex element102a, the second convex element102b, the third convex element102cand the fourth convex element102dthrough the first insertion hole302a, the second insertion hole302b, the third insertion hole302cand the fourth insertion hole302drespectively, and by pulling the first convex element102a, the second convex element102b, the third convex element102cand the fourth convex element102dout from the first insertion hole302a, the second insertion hole302b, the third insertion hole302cand the fourth insertion hole302drespectively. Furthermore, the backpack500encompasses a first fixing lid303a, a second fixing lid303b, a third fixing lid303cand a fourth fixing lid303dat the end pieces of the first convex element102a, the second convex element102b, the third convex element102cand the fourth convex element102d, respectively.

In the backpack500according to the third modification, schemes of combining the elements of the backpack500, structures, materials and usages of the storage-compartment100and the back plate300, etc., are almost similar to the backpack1recited in the first embodiment. However, the backpack500according to the third modification is different from the backpack1explained in the first embodiment, in the feature that the storage-compartment100and the back plate300does not have any pedestals connected with the above four convex elements and a pedestal-storing depression fitted to the pedestals. In addition, in the backpack500according to the third modification, the thickness of the back plate300can be set thinner, because the backpack500does not encompass any elements corresponding to the pedestal-storing depressions.

Moreover, as illustrated inFIG.9andFIG.10, the backpack500according to the third modification is also different from the backpack1explained in the first embodiment, in the feature that the positions for fixing the storage-compartment100and the back plate300are four. Since there are quadruple fixing positions in the backpack500according to the third modification, the backpack500according to the third modification has a structure which is enough to withstand vibration or shock generated from user when the user moves, compared with the backpack1recited in the first embodiment. Also, according to the backpack500of the third modification, the advantageous effect that the storage-compartment100can be fixed more strongly and more stably, and the user can feel safe when carrying the backpack500, is realized, compared with the backpack1recited in the first embodiment. Furthermore, according to the backpack500of the third modification, the storage-compartment100can be fixed more strongly and more stably compared with the backpack2000explained in the second modification, because the backpack500according to the third modification has the fixing positions more than that of the backpack2000explained in the second modification.

According to the backpack500pertaining to the third modification, similar to the backpack1explained in the first embodiment, the storage-compartment100or the back plate300can be exchanged to the arbitrary storage-compartment or the arbitrary back plate among the plurality of options of storage-compartments or the plurality of options of back plates, by separating the storage-compartment100from the back plate300or by combining the storage-compartment100with the back plate300, if the plurality of options of storage-compartments and the plurality of options of back plates are prepared. Also, another person or anyone else just happen to be the place can exchange the storage-compartment100to the other storage-compartment, while the user is carrying the backpack500pertaining to the third modification, if the plurality of options of storage-compartments and the plurality of options of back plates are prepared. As a result of adoptions of the above structures, similar to the backpack1explained in the first embodiment, the backpack500pertaining to the third modification has variety, diverseness and multifariousness in the combination of the storage-compartment100, the back plate300, etc., and the degrees of freedom to select color, shape, etc., increases drastically. The variety of the combination can also bring economic advantages. The backpack500pertaining to the third modification is very economical for user, because various situations will be sometimes occurred in user, such that the user is enough to prepare, or purchase either one of a new storage-compartment or a new back plate, when any backpack having a preferred appearance is desired to be owned.

Fourth Modification of First Embodiment

As illustrated inFIG.11, a backpack700according to a fourth modification of the first embodiment encompasses a box-shaped storage-compartment200and a back plate400removable from the storage-compartment200. The storage-compartment200has a box-shaped structure implemented by first and second main surfaces opposite to each other, and triple side-surfaces. The triple side-surfaces connects triple continuous sides defined to the first main surface and the counterpart triple continuous sides assigned to the second main surface opposite to the triple continuous sides of the first main surface. The back plate400has a plate-shape structure, and has a joint plane opposite to the first main surface when combining to the storage-compartment200and a backrest plane opposite to the joint plane. The back plate400has a pair of shoulder straps (51a,51b) bridging from an upper portion of the backrest plane to a lower portion of the backrest plane. InFIG.11,FIG.13andFIG.19, the pair of shoulder straps (51a,51b) is omitted for simplifying the drawings. In the backpack700according to the fourth modification, a convex element (201,203) is provided on the first main surface, and an insertion hole402having a structure corresponding to the convex element (201,203) is provided in the location corresponding to the convex element (201,203) on the joint plane. Also, the attachment and the detachment of the storage-compartment200and the back plate400is freely achieved, by passing the convex element (201,203) through the insertion hole402and by pulling the convex element (201,203) out from the insertion hole402. Furthermore, the backpack700according to the fourth modification encompasses a backrest-cushion pad-cover53afor covering the convex element (201,203) when the convex element (201,203) is inserted to the insertion hole402.

In the backpack700according to the fourth modification, a structure of the convex element (201,203), a structure of the insertion hole402and corresponding fixing scheme of the storage-compartment200and the back plate400ascribable to the structures of the convex element (201,203) and the insertion hole402are different from the backpack1of the first embodiment. Also, the backpack700according to the fourth modification is different from the backpack1explained in the first embodiment, regarding the point that the backpack700encompasses the backrest-cushion pad-cover53afor covering the convex element (201,203) when the convex element (201,203) is inserted to the insertion hole402from the backrest plane side. The other members and schemes of connecting the elements of the backpack700according to the fourth modification, usages of that backpack700, etc., other than the differences above, are similar to the backpack1recited in the first embodiment.

In the backpack700according to the fourth modification, as illustrated inFIG.11,FIG.13, etc., the backpack700has a fixing mechanism that the storage-compartment200is fixed to the back plate400by passing the convex element (201,203) through the insertion hole402, and by using a fixing handle203of the tip portion of the convex element (201,203). In the backpack700according to the fourth modification, the storage-compartment200and the back plate400are separated each other, when the fixing by the fixing handle203as the fixing mechanism is released, and the convex element (201,203) is put out from the insertion hole402. The storage-compartment200encompasses a fastener33and a top handle31at the upper portion of the storage-compartment200, a pedestal202on the first main surface, the convex element (201,203) on the pedestal202, and the fixing handle203at the tip portion of the convex element (201,203).

As illustrated inFIG.11andFIG.18, the fixing handle203which is located at the tip portion of the convex element (201,203) is a freely rotatable element in a rotation surface in parallel with the first main surface provided the convex element (201,203), around a handle axis201as the center of rotation. In order to combine the storage-compartment200with the back plate400, for example, as illustrated inFIG.13, after passing the fixing handle203through the insertion hole402, the fixing handle203is rotated about 90 degrees in one direction among the left and right directions around the handle axis201as the center of rotation in the rotation surface in parallel with the first main surface, and the storage-compartment200is fixed to the back plate400. In the rotation angle of the fixing handle203, any angle except zero degree and 180 degrees is good for fixing the storage-compartment200with the back plate400. As used herein, “zero degree” of the rotation angle of the fixing handle203is defined by a state that the fixing handle203does not rotate after passing the fixing handle203through the vertically long insertion hole402. In the state of zero degree, the fixing handle203is freely put out from the insertion hole402. The rotation angle when the fixing handle203is rotated is determined by using “zero degree” as the reference. It is preferable that the rotation angle of the fixing handle203is from 45 degrees to 135 degrees, from the point of the stability of fixing. As illustrated inFIG.13, the fixing handle203and the peripheral area of the fixing handle203is covered by the backrest-cushion pad-cover53a, after fixing the storage-compartment200with the back plate400, so as not to make the user feel uncomfortable on own back when the user carries the backpack700. As a method of attaching the backrest-cushion pad-cover53ato the back plate400, for example, a method of opening the small holes for putting the screws through at the four corners of the backrest-cushion pad-cover53a, and fixing the storage-compartment200with the backrest plane of the back plate400by the screws putted through the small holes, is applicable. Also, as another fixing methods, using a surface fastener, using a magnetic force, etc., are applicable to the fourth modification.

In the backpack700according to the fourth modification, since the backpack700has no fixing lid, the operation of closing the cover when the storage-compartment200is fixed to the back plate400, can be omitted. In the backpack700according to the fourth modification, it is possible to fix the storage-compartment200with the back plate400by only rotating the fixing handle203, even if the backpack700does not encompasses a fixing lid. Also, the backpack700according to the fourth modification can provide the advantageous effect as below. That is, the operation of attachment and detachment when exchanging the storage-compartment200or the back plate400of the backpack700becomes easier, compared with the first embodiment, the first to third modifications of the first embodiment. In the backpack700according to the fourth modification, since the fixing handle203is fixed to the handle axis201, there is no anxiety of losing the fixing handle203as the fixing mechanism.

It is preferable that the backrest plane has a shape close to a plane, in order to keep the user feel comfortable in the state of attaching the backrest-cushion pad-cover53ato the backrest cushion pad53. That is, as illustrated inFIG.11, etc., it is preferable that the backpack700encompasses a shallower concave portion406on the backrest cushion pad53for storing the backrest-cushion pad-cover53a, in advance. It is preferable that the backrest-cushion pad-cover53ais made of the same material of the backrest cushion pad53, but the backrest-cushion pad-cover53adoes not have to be made of a material as same as the material of the backrest cushion pad53.

According to the backpack700pertaining to the fourth modification, similar to the backpack1explained in the first embodiment, the storage-compartment200or the back plate400can be exchanged to the arbitrary storage-compartment or the arbitrary back plate among the plurality of options of storage-compartments or the plurality of options of back plates, by separating the storage-compartment200from the back plate400or by combining the storage-compartment200with the back plate400, if the plurality of options of storage-compartments and the plurality of options of back plates are prepared. Also, another person or anyone else just happen to be the place can exchange the storage-compartment200to the other storage-compartment, while the user is carrying the backpack700pertaining to the fourth modification, if the plurality of options of storage-compartments and the plurality of options of back plates are prepared. As a result of adoptions of the above structures, similar to the backpack1explained in the first embodiment, the backpack700pertaining to the fourth modification has variety, diverseness and multifariousness in the combination of the storage-compartment200, the back plate400, etc., and the degrees of freedom to select color, shape, etc., increases drastically. The variety of the combination can also bring economic advantages. The backpack700pertaining to the fourth modification is very economical for user, because various situations will be sometimes occurred in user, such that the user is enough to prepare, or purchase either one of a new storage-compartment or a new back plate, when any backpack having a preferred appearance is desired to be owned.

Second Embodiment

As illustrated inFIG.14, a backpack1100according to a second embodiment encompasses a box-shaped storage-compartment10and a back plate11removable from the storage-compartment10. The storage-compartment10has a box-shaped structure implemented by first and second main surfaces opposite to each other, and triple side-surfaces. The triple side-surfaces connects triple continuous sides defined to the first main surface and the counterpart triple continuous sides assigned to the second main surface opposite to the triple continuous sides of the first main surface. The back plate11has a plate-shape structure, and has a joint plane opposite to the first main surface when combining to the storage-compartment10and a backrest plane opposite to the joint plane. The back plate11has a pair of shoulder straps (51a,51b) bridging from an upper portion of the backrest plane to a lower portion of the backrest plane. In the backpack1100according to the second embodiment, a convex element11ais provided on the joint plane, an insertion hole10bhaving a structure corresponding to the convex element11ais provided in the location corresponding to the convex element11aon the first main surface. Also, the attachment and the detachment of the storage-compartment10and the back plate11is freely achieved, by passing the convex element11athrough the insertion hole10band by pulling the convex element11aout from the insertion hole10b.

The backpack1100according to the second embodiment is different from the backpack1explained in the first embodiment, at technical features of the locations of the convex element and the insertion hole where the convex element can be allowed to pass through. That is, since the convex element11ais provided on the joint plane and the insertion hole (first insertion hole)10bis provided in the first main surface, the backpack1100has a structure opposite to the structure of the backpack1explained in the first embodiment, at technical features of the locations of the convex element and the insertion hole. A fixing lid (first fixing lid)10aas “the fixing mechanism (first fixing mechanism)” which fixes the convex element11ato the storage-compartment10is provided at the tip portion of the convex element11a, so as to be possible to attach to and detach from the convex element11afreely. Since the fixing lid10ahas an external form larger than the insertion hole10b, the fixing lid10acannot pass the insertion hole10bthrough. The fixing lid10afixes the convex element11ato the storage-compartment10from the inside of the storage-compartment10by combining the convex element11a. For convenience of putting the goods in and out the storage-compartment10, it is preferable that the fixing lid10ais set, so as not to project too much toward the inside of the storage-compartment10when combining with the convex element11a.

In the backpack1100according to the second embodiment, a rubber packing or an element instead of the rubber packing may be sandwiched between the fixing lid10aand the first main surface, preventing from letting raindrops and the like enter into the storage-compartment10. As a result, a performance of high waterproof property is achieved.

A fixing the storage-compartment10to the back plate11can be operated by the same operation as the backpack1explained in the first embodiment, using the elements having the same mechanism as the backpack1recited in the first embodiment. The other elements and methods of connecting the elements of the backpack1100according to the second embodiment, usages of that backpack1100, etc., other than the differences above, such as the locations of the convex element and the insertion hole passing the convex element through, are as same as backpack1recited in the first embodiment.

According to the backpack1100pertaining to the second embodiment, similar to the backpack1explained in the first embodiment, the storage-compartment10or the back plate11can be exchanged to the arbitrary storage-compartment or the arbitrary back plate among the plurality of options of storage-compartments or the plurality of options of back plates, by separating the storage-compartment10from the back plate11or by combining the storage-compartment10with the back plate11, if the plurality of options of storage-compartments and the plurality of options of back plates are prepared. Also, another person or anyone else just happen to be the place can exchange the storage-compartment10to the other storage-compartment, while the user is carrying the backpack1100pertaining to the second embodiment, if the plurality of options of storage-compartments and the plurality of options of back plates are prepared. As a result of adoptions of the above structures, similar to the backpack1explained in the first embodiment, the backpack1100pertaining to the second embodiment has variety, diverseness and multifariousness in the combination of the storage-compartment10, the back plate11, etc., and the degrees of freedom to select color, shape, etc., increases drastically. The variety of the combination can also bring economic advantages. The backpack1100pertaining to the second embodiment is very economical for user, because various situations will be sometimes occurred in user, such that the user is enough to prepare, or purchase either one of a new storage-compartment or a new back plate, when any backpack having a preferred appearance is desired to be owned.

According to the backpack1100of the second embodiment, since the fixing lid10ais provided in the storage-compartment10, another person or anyone else just happen to be the place can execute an exchange operation of the storage-compartment10easily in a state that the user carries the backpack1100on the back, compared with the backpack1recited in the first embodiment. Furthermore, as illustrated inFIG.15, the comfort level of the user when the user carries the backpack1100can be higher, in the state of fixing the storage-compartment10to the back plate11, because of no roughness caused by existence of fixing means, on backrest cushion pad53of the backrest plane.

Other Embodiments

As described above, the present invention is explained by the first embodiment, the first to fourth modifications of the first embodiment, and the second embodiment, but the descriptions and the drawings that implement a part of the disclosure of invention should not be construed to limit the present invention. That is, persons skilled in the art can produce various embodiments and modifications and operational techniques, based on the disclosure above.

For, example, considering the visibility from the backward view and the ensuring of user's safety from the traffic accident, etc., a LED illumination panel, etc., may be provided on entire surface, some parts or one part of the storage-compartment3, in the backpack1recited in the first embodiment. As a result, the user's safety in the night and day can be drastically improved. Therefore, the backpack according to the present invention is effective when using the backpack as a backpack, a school backpack, etc., for a child and an elementary school student.

Also, for example, the cross-sectional view of the convex element6of the backpack1explained in the first embodiment is a perfect circle and the entire form of the convex element6is a columnar form, inFIG.1. However, the cross-sectional view of the convex element6may be an elliptical form and the entire form of the convex element6may be a cylindrical form. Furthermore, the form of the convex element6may be the other forms except the forms above. In the case that the cross-sectional view of the convex element6is not the perfect circle and the entire form of the convex element6is not the columnar form, it is possible to prevent the rotary motion of the storage-compartment3against the back plate5, by only passing the convex element6through the insertion hole54. In the case that the cross-sectional view of the convex element6is not the perfect circle and the entire form of the convex element6is not the columnar form, the pedestal32and the pedestal-storing depression55as illustrated inFIG.1, etc., for preventing the rotary motion, is not necessary.

As a further operational technique, the backpack1pertaining to the first embodiment etc. can be used as a specific backpack which contains a blower apparatus for circulating air into a protective clothing for a medical worker, etc. For housing the blower apparatus in the protective clothing, the back plate5of the backpack1pertaining to the first embodiment may further includes a first air duct which passes through from the joint plane to the backrest plane, in order to connect the first air duct to the corresponding hole (air intake) of the protective clothing. Also, the storage-compartment3connected to the back plate5may include a battery (Lithium-ion battery, etc.) for operating the blower apparatus, a blower fan which let the air enter to the inside of the protective clothing, and a second air duct as the passage of the air to the back plate5. The first air duct and the second air duct are connected each other. The insertion hole54of the back plate5may be used also for the first air duct, or the first air duct may be prepared independently from the insertion hole54. In the case of providing the first air duct by using the insertion hole54, the fixing means with the hole instead of the fixing lid52may be used, and the air may be entered into the protective clothing. In addition, in the case of providing the first air duct by using the insertion hole54, the convex element6of the storage-compartment3may be used also for the second air duct. In this case, the convex element6has a hole, this hole passes through the pedestal32and the first main surface of the storage-compartment3, and this hole is connected to at least the inside of the storage-compartment3. The blower fan may be provided at the inside of the storage-compartment3, or may be provided on the second main surface side or the other side surfaces. In the case that the insertion hole54of the back plate5is not used also for the first air duct, the second air duct is provided at a location corresponding to the first air duct. The filter having a function which blocks the intrusion of virus is provided at a portion where the air is sucked from the outside of the backpack1into the storage-compartment3. In the protective clothing, it supposes that the air intake with the filter which combines with the first air duct and circulates the air into the protective clothing, is provided at the back surface side, and that the air outlet with the filter which releases the air from the inside of the protective clothing to the outside of the protective clothing, is provided at the back side of head, etc. In the case of the protective clothing not covering the user's head portion, for example, the air outlet may be provided at around the back of knee, around the feet, etc. Also, the number and the location of the air outlets are not limited. In the case that the diameter or the area of the air outlet is larger than that of the air intake, it is possible to easily release the air from the inside of the protective clothing. Furthermore, it is preferable that valves, such as check valves, are provided at the first and second air ducts, and the air intake and the air outlet of the protective clothing, respectively, for preventing the backward flow of the air.

When using backpack1which incorporates the blower apparatus, at first, the user as the medical worker who uses the backpack1carries the back plate5on the back, and connects the first air duct of the back plate5to the intake of the protective clothing, after wearing the protective clothing in a place without a fear of viral infection, such as a clean room. Next, the user connects the storage-compartment3to the back plate5. And the backpack1has a mechanism that the air is taken into the inside of the protective clothing, when turning the blower apparatus on and activating the blower fan. In of the protective clothing, the air taken in the protective clothing is diffused, and the air in the protective clothing is released from the inside of the protective clothing to the outside of the protective clothing through the air outlet of the protective clothing. In the case that the user desires to use the protecting clothing without the blower apparatus, the backpack1is released from the weight of the blower apparatus by detaching the storage-compartment3from the back plate5. In the case that the user desires to use the protecting clothing without the blower apparatus, and the valves, such as check valves, is provided at the first air duct of the back plate5, the user may operate while the user carries the back plate5on the back. Also, the back plate5should be a dedicated element for the specific user through the lifetime of the backpack1, from the point of view of preventing the infection expansion of virus, etc. Furthermore, the same as above, from the point of view of preventing the infection expansion of virus, etc., it is preferable that the user operates while carrying the back plate5, when the user uses the protective clothing without using the blower apparatus. The advantage that the attachment of the storage-compartment3with the blower fan is completed quickly, is obtained by operating while carrying the back plate5on the back, in the situation of using the blower apparatus again. As illustrated inFIG.1, etc., since the back plate5itself is thin and relatively light, the disturbance regarding the operation of user is almost not generated.

It is possible to reduce the rise of temperature and humidity of the inside of the protective clothing which is connected to the backpack1, and to keep the comfort of using the protective clothing while the intrusion of virus, etc., to the user is prevented. In particular, the backpack1which installs the blower apparatus is effective, in the case of using the protective clothing in the indoor or outdoor of summer season. In the backpack1which installs the blower apparatus, it is possible to use the back plate5most close to the user and having the largest contact numbers to the user, as the dedicated element for the specific user. As a result, the possibility of the infection expansion of virus to the other persons is considerably reduced, especially. In the backpack1which installs the blower apparatus, the backpack1has an advantage that the sending the air to the inside of the protective clothing can restart quickly while the infection expansion of virus to the other persons is prevented, after only exchanging the storage-compartment3with the blower apparatus for exchanging the filter, etc., of the blower fan side. In the backpack1which installs the blower apparatus, the storage-compartment3can be also used as the goods-storage element, and, for example, it is possible to store a decontamination and disinfection article, a spare filter, etc. Of course, the blower apparatus is applicable not only to the backpack1pertaining to the first embodiment, but also to the backpack pertaining to the other embodiments and the other modifications.

Furthermore, it is also possible to combine the technical ideas explained with the first embodiment, the first to fourth modifications of the first embodiment, and the second embodiment, etc., mutually. For example, in the second embodiment, although the storage-compartment10and the back plate11is combined by the one convex element and the one insertion hole, the number of the convex elements and the insertion holes may be a plural number as illustrated in the first to fourth modifications of the first embodiment. In the backpack1100pertaining to the second embodiment, the fixing and supporting force between the storage-compartment10and the back plate11becomes stronger by encompassing the combination portions at the four corners of the storage-compartment10and the back plate11. As described above, naturally, the present invention includes various embodiments and modifications and the like which are not detailed above. Therefore, the technical scope of the present invention will be defined by only the invention specific matter according to the following claims which is drew from the above-mentioned description appropriately.