CN208510256U

CN208510256U - A kind of knapsack

Info

Publication number: CN208510256U
Application number: CN201820994664.8U
Authority: CN
Inventors: 付国智
Original assignee: Shenzhen Dushi Creative Daily Necessities Co Ltd
Current assignee: Shenzhen Dushi Creative Daily Necessities Co Ltd
Priority date: 2018-06-26
Filing date: 2018-06-26
Publication date: 2019-02-19
Anticipated expiration: 2028-06-26

Abstract

The utility model relates to technical field of living goods more particularly to a kind of knapsacks.A kind of knapsack, knapsack includes that back mentions portion and backpack body, back mentions the bottom for partially suturing between portion and backpack body and being formed and being used for support luggage, back, which mentions portion, forms an opening with the part that backpack body mutually separates, back mentions and opening is provided with the closure member for closing opening between portion and backpack body, backpack body includes the multi-disc splicing piece for successively suturing splicing, splicing piece includes two joining edges being oppositely arranged, backpack body includes the scaling part being arranged on two joining edges of any splicing piece or on each joining edge of any two panels splicing piece, the scaling part on two joining edges is arranged in cooperate so that backpack body is in contraction state or unfolded state.Backpack body is set as being spliced by multi-disc splicing piece, and the setting scaling part on the joining edge of splicing piece, the contraction state and unfolded state of backpack body can be controlled well, facilitate size of user when going on a journey according to how much setting backpack bodies of luggage.

Description

A kind of knapsack

[technical field]

The utility model relates to technical field of living goods more particularly to a kind of knapsacks.

[background technique]

Knapsack daily necessity indispensable when being people's trip, the material diversification of knapsack, have corium, plastic material, terylene, Canvas, nylon, the quality such as linen-cotton.Meanwhile in the period of increasingly bragging about individual character, the back of all kinds of styles such as brief, pseudo-classic, cartoon Packet also never pander to the trend of the times the demand of personage's showing personality by ipsilateral.

The capacity of existing knapsack is generally fixation, when traveler need to bear the object of different number, single capacity Storage of the knapsack inconvenience to object.Such as, when object is less, object, which is stored in knapsack, be easy to cause object to shake, and is easy damage Bad object；Or when object is larger, single capacity is difficult to store object again and store, it is therefore desirable to propose a kind of convenience Change the knapsack of knapsack capacity.

[utility model content]

To overcome existing knapsack to have the defects that capacity is single, storage object is inconvenient, the utility model provides a kind of behaviour Make simplicity, facilitates the knapsack of the object of storage different volumes.

The utility model provides a kind of knapsack, and the knapsack includes that back mentions portion and backpack body, and the back mentions portion and the backpack body Between partially suture form the bottom for being used for support luggage, the back, which mentions the part that portion and the backpack body mutually separate and forms one, to be opened Mouthful, the back mentions and the opening is provided with the closure member for closing the opening, the packet between portion and the backpack body Body includes the multi-disc splicing piece for successively suturing splicing, and the splicing piece includes two joining edges being oppositely arranged, the backpack body packet The scaling part on two joining edges that any splicing piece is set or on each joining edge of any two panels splicing piece is included, The scaling part on two joining edges is arranged in cooperate so that backpack body is in contraction state or unfolded state.

Preferably, the backpack body includes short transverse and width direction, the direction of the joining edge of the splicing piece and described The short transverse of backpack body is consistent；Or the direction of the joining edge of the splicing piece is consistent with the width direction of the backpack body.

Preferably, the scaling part is zipper, and the scaling part includes the two parts being oppositely arranged, a portion suture On the joining edge of the splicing piece, another part is sewn on another joining edge of same splicing piece or another splicing piece A joining edge on；Or the scaling part is to tighten rope, offers perforating on the joining edge of the splicing piece, it is described to tighten rope It successively wears the perforating being arranged on each joining edge by the same splicing piece or any two panels splices any of piece The perforating of joining edge；Or the scaling part is button, the half of the scaling part is fixed on the joining edge of the splicing piece On, the other half is fixed on another joining edge of same splicing piece or on any joining edge of another splicing piece.

Preferably, the back portion of mentioning includes the backrest plate being affixed with knapsack person's back, and the backpack body mentions the two of portion close to back Block splicing piece connects with the backrest plate part, and the splicing on piece to connect with the backrest plate is provided with the first handle, and described the One handle be arranged in the splicing piece far from the side of bottom on, and one end of first handle is fixed on a splicing piece On, the other end is fixed on another splicing on piece, and the two pieces of splicing on pieces to connect with the backrest plate are respectively arranged with scaling part, when When the two panels splicing piece to connect with the backrest plate is in contraction state, first handle is stored by the scaling part to be hidden.

Preferably, the splicing on piece to connect with the backrest plate is provided with storage bag, and the storage bag is arranged in the spelling On the side of bottom, the accommodating chamber of the storage bag exposes to the surface of the splicing piece for contact pin, leans against when with described When the two panels splicing piece that plate part connects is in contraction state, the storage bag is stored by the scaling part to be hidden.

Preferably, the closure member is zipper, and the backpack body or the back portion of mentioning, which are additionally provided with, can cover the closing The lid of part closes piece, and it includes opposite two sides that the lid, which closes piece, and wherein side mentions portion with the back or the backpack body is fixedly connected, The other side is freely arranged with respect to backpack body or the back portion of mentioning, and the lid closes piece and can turn down along the closure member, so that the closure member It is exposed or hiding by lid conjunction piece covering.

Preferably, the knapsack further includes that limitation lid closes the locating piece that piece freely turns down, and the locating piece includes phase interworking The first part of conjunction and second part, the first part are fixed on the lid and close on piece, second part be fixed on backpack body or On backrest plate position corresponding with first part.It is described fixed when the lid closes piece fold so that the closure member is exposed The first part of position part and second part, which cooperate, is fixedly connected with lid conjunction piece with the backpack body or the back portion of mentioning, and limits System lid closes piece and freely turns down.

Preferably, the back portion of mentioning further includes the harness being fixedly connected with the backrest plate, the both ends difference of the harness The opposite both ends of the backrest plate short transverse are fixed on, the back portion of mentioning further includes being set to the backrest plate phase along opening direction To the second handle on bottom side.

Preferably, the backrest plate is provided with collection bag close to the side of the harness, and the collection bag includes one hiding Accommodating chamber among the backrest plate and set on backrest plate outer surface and the opening that is communicated with accommodating chamber.

Preferably, it is provided between two pieces of splicing pieces of the arbitrary neighborhood that the backpack body is mutually separated with the back portion of mentioning hiding Bag, the hidden bag include a hiding chamber being hidden among the backpack body and communicate set on backpack body outer surface and with hiding chamber Opening.

Compared with prior art, backpack body is set as being spliced by multi-disc splicing piece, and on the joining edge of splicing piece Setting scaling part, the contraction state and unfolded state of backpack body can be controlled well, facilitate user when going on a journey according to luggage number The size of backpack body is set, so that luggage is preferably fixed in backpack body, luggage is avoided to shake in backpack body, luggage is caused to be damaged It is bad, while the volume of backpack body can be reduced well, facilitate user to go on a journey；Alternatively, when user leaves unused knapsack, it can be well by it Shrink storage；Or when user is in travelling, buys article, the volume of backpack body can be expanded, be facilitated more things Storage.

The scaling part is zipper, tightens the structures such as rope or button accessory simple to operation, facilitates user according to need Quickly to adjust the size of backpack body volume.

When backpack body stores more luggage, when backpack body is in unfolded state, first handle exposes the backpack body, facilitates use Family passes through the luggage in the first handle sack-hauling technique；When backpack body installs less luggage, the backpack body is in contraction state, institute State the first handle be scaled part hide, the volume of backpack body can be further decreased, user is facilitated to go on a journey.

The setting of storage bag facilitates user that the trip object such as cup or umbrella is placed in storage bag, and user is facilitated to go out Row.

Lid, which closes piece, well to be hidden closure member, avoid user during walking, other people arbitrarily beat closure member It opens, takes the luggage in backpack body away, to play antitheft effect.The lid closes the work that piece has preferable dust and water protection simultaneously With avoiding luggage in backpack body contaminated.When conjunction piece fold will be covered, so that the closure member is exposed, facilitates and be put into luggage Backpack body takes out from backpack body.

Lid closes on piece and locating piece is arranged, and facilitates and is fixedly connected with lid conjunction piece with backpack body, limitation lid closes piece and freely turns down, convenient Luggage is put into backpack body or takes out luggage from backpack body.

The side of harness is provided with collection bag in backrest plate, when user's trip, small article is placed on collection In bag, the back of backrest plate and user fit, and can prevent article stolen well.

[Detailed description of the invention]

Fig. 1 is the overall structure diagram of the utility model；

Fig. 2 is overall structure diagram when the utility model backpack body is in contraction state；

Fig. 3 is the overall structure diagram of the second specific embodiment of the utility model；

Fig. 4 is the overall structure diagram of the utility model third specific embodiment；

Fig. 5 is the overall structure when direction of the joining edge of splicing piece in the utility model is consistent with the width direction of backpack body Schematic diagram；

Fig. 6 is another overall structure diagram of the utility model；

Fig. 7 is the overall structure diagram of the other direction of the utility model；

When Fig. 8 is that the utility model back mentions portion and backpack body into opening-like state, overall structure signal when closure member is exposed Figure；

Fig. 9 is the overall structure diagram that the utility model closure member is closed another state that piece lid closes when hiding by lid.

Description of symbols:

10, knapsack；20, back mentions portion；201, backrest plate；202, harness；203, the second handle；204, collection bag；30, it wraps Body；301, splice piece；3011, joining edge；3012, perforating；302, part is scaled；3023, zipper head；303, the first handle； 304, storage bag；305, hidden bag；40, it is open；50, bottom；60, closure member；70, lid closes piece；80, locating piece；801, first Part；802, second part.

[specific embodiment]

In order to make the purpose of this utility model, technical solution and advantage are more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to solve The utility model is released, is not used to limit the utility model.

Referring to Fig. 1, the utility model provides a kind of knapsack 10, the knapsack 10 includes that back mentions portion 20 and backpack body 30, institute It states back and proposes between portion 20 and the backpack body 30 partially suture and be fixedly connected, formed between portion 20 and backpack body 30 for holding so that back mentions Hold in the palm the bottom 50 of luggage.The back mentions portion 20 and is formed with the part that the backpack body 30 mutually separates the opening 40 for picking and placing luggage. The back mentions portion 20 and the backpack body 30 is enclosed the accommodating chamber for depositing one's luggage.Luggage is put into accommodating chamber by opening 40 Or by being taken out in accommodating chamber.

The backpack body 30 includes successively suturing the multi-disc splicing piece 301 of splicing and being arranged on the splicing piece 301 Part 302 is scaled, the scaling part 302 controls the contraction state and unfolded state of the backpack body 30.The material of the splicing piece 301 It can be corium, plastics, terylene, canvas, nylon, the quality such as linen-cotton have certain bent or folding property.The splicing The shape of piece 301 is similar to ellipticity comprising the both sides joining edge 3011 being oppositely arranged along its length.The backpack body 30 include its short transverse and its width direction, and the joining edge 3011 of the splicing piece 301 is consistent with the short transverse of backpack body 30.

Incorporated by reference to Fig. 1 and Fig. 2, is mentioned with the back and be provided with the first handle 303 on the splicing piece 301 that portion 20 connects, it is described First handle 303 is arranged on the splicing side of the piece 301 far from bottom 50, and one end of first handle 303 is solid Be scheduled on a splicing piece 301, the other end be fixed on it is another with it is described back mention on the splicing piece 301 that portion 20 connects.It is mentioned with the back A scaling part 302 is respectively arranged on two pieces of splicing pieces 301 that portion 20 connects.As shown in Figure 2, when with it is described back propose 20 phase of portion When the two panels splicing piece 301 connect is in contraction state, first handle 303 is hidden in described by the scaling part 302 storage Splice in the cavity that piece 301 and the scaling part 302 are formed.At this point, the backpack body 30 is in contraction state, born for user The use state when luggage of small volume.When backpack body 30 being shunk at this time and hiding the first handle 303, backpack body can increase 30 regularity and the volume for reducing backpack body 30, facilitate traveler to use.When backpack body 30 is in unfolded state, described first Handle 303 exposes to the outer surface of backpack body 30, when user bears more luggage, be arranged the first handle 303 convenient for users to Lift the knapsack 10.

Please continue to refer to Fig. 1 and Fig. 2, is mentioned with back and be additionally provided with storage bag on two pieces of splicing pieces 301 that portion 20 connects 304, the storage bag 304 be arranged in splicing piece 301 close to one end of bottom 50 and the object placing cavity of the storage bag 304 and its Opening exposes to the outer surface of the splicing piece 301.It is respectively set on two pieces of splicing pieces 301 that portion 20 connects when being mentioned with the back When having a scaling part 302, and mentioning two pieces of splicing pieces 301 that portion 20 connects with back and be in contraction state, storage bag 304 is scaled part 302 storages are hidden.When mentioning two pieces of splicing pieces 301 that portion 20 connects with back and being in unfolded state, the exposing backpack body 30 of storage bag 304 Outer surface, facilitate and cup, umbrella and other items be placed into storage bag 304.

Please continue to refer to Fig. 1, the backpack body 30 is additionally provided with hidden bag 305, and the hidden bag 305 includes being arranged in backpack body Hiding chamber inside 30 and set on 30 outer surface of backpack body and the opening (not labeled) that is communicated with hiding chamber.The hidden bag 305 The stitching portion of adjacent two panels splicing piece 301 is arranged in the zipper 3051 of opening and closing opening.The setting side of hidden bag 305 Just small article is placed wherein.

In some specific embodiments, the hidden bag 305 may be configured as one or more.

Incorporated by reference to Fig. 1 and Fig. 2, in the first specific embodiment, the scaling part 302 is specially zipper, the scaling Part 302 includes two parts for being oppositely arranged, a part of the scaling part 302 along splicing piece 301 a joining edge 3011 simultaneously Thereon, another part is sewn on another joining edge 3011 of same splicing piece 301 for suture.At this point, any joining edge Scaling part 302 on 3011 is additionally provided with zipper head 3023, and the scaling on the zipper head 3023 and another joining edge 3011 Part 302 is connected, and the contraction and expansion of backpack body 30 are controlled by zipper head 3023.Specifically, the scaling part 302 is fixed respectively On two joining edges 3011 for mentioning two pieces of splicing pieces 301 that portion 20 connects with back.When zipper head 3023 is by two of scaling part 302 When point sealed, be provided with scaling part 302 splicing piece 301 be folded it is hiding.At this point, backpack body 30 is in contraction state, it is suitble to Use when passerby bears less luggage or small piece luggage.

Referring to Fig. 3, the scaling part 302 is all zipper in the second specific embodiment, the scaling part 302 A portion is sewn on the joining edge 3011 for mentioning the splicing piece 301 that portion 20 connects with back, and another part is sewn to be mentioned with back On the joining edge 3011 of other splicing pieces 301 of 20 phase of portion separation.When zipper head 3023 is sealed, it will can be provided with well The two panels or multi-disc splicing piece 301 for scaling part 302 are shunk, so that backpack body 30 is in compressive state.So that backpack body 30 is with more Kind use state.

It is appreciated that in other embodiments, when scaling part 302 is all zipper, the opposite of scaling part 302 is set The two parts set can be set on two joining edges 3011 of any splicing piece 301 or be separately positioned on different two panels splicing pieces On 301 joining edge, so that backpack body 30 has different contraction states.

Referring to Fig. 4, scaling part 302 is to tighten rope in third specific embodiment, the suture of the splicing piece 301 Perforating 3012 is offered on side 3011, the scaling part 302 is successively worn through the same splicing piece 301 or adjacent spelling The perforating 3012 of each joining edge 3011 of contact pin 301 tenses or unclamps the scaling part 302, receives so that backpack body 30 is in Contracting state or unfolded state.

It is appreciated that the scaling part 302 can also be button or other fasteners, the half of the button is fixed on On the joining edge 3011 of the one splicing piece 301, the other half is fixed on the seam of same splicing piece 301 or another splicing piece 301 It closes on side 3011,301 folding shrinking of piece will be spliced by being fastened by the two halves of button, so that backpack body 30 is in contraction state.

Referring to Fig. 5, what backpack body 30 included splices piece 301 along the width of backpack body 30 in some specific implementations Spend direction setting.That is, the direction of the joining edge 3011 of splicing piece 301 and the width direction of backpack body 30 are consistent.The splicing It is again provided with control backpack body 30 on piece 301 to shrink and 302 (not shown) of scaling part of unfolded state, set-up mode and above-mentioned Embodiment is identical, and details are not described herein.

Referring to Fig. 6, the back mentions portion 20 and includes the backrest plate 201 being affixed with knapsack person's back and be connected to backrest plate Harness 202 on 201.It is fixed close to two panels splicing 301 part of piece of backrest plate 201 and the suture of backrest plate 201.Harness 202 Both ends are separately fixed at the opposite both ends of 201 short transverse of backrest plate.It further includes being arranged in the back that the back, which mentions portion 20, Second handle 203 at 201 top of backup plate.

Incorporated by reference to Fig. 7, the side that the back of backrest plate 201 and knapsack person fit is provided with collection bag 204, collection bag 204 include one being hidden in the accommodating chamber among the backrest plate 201 and communicating set on 201 outer surface of backrest plate and with accommodating chamber Be open (not labeled).Short transverse setting and the collection bag of the opening (not labeled) direction of collection bag 204 along backrest plate 201 204 accommodating chamber is hidden in the backrest plate 201, using zipper 2041 by the closure of openings.

It is provided with along the opening 40 for closing between portion 20 and the backpack body 30 referring to Fig. 8, the back mentions State the closure member 60 of opening 40.The closure member 60 is zipper, and the closure member 60 is fixed on backrest plate 201 and backpack body on one side On the edge of 30 phases separation, the another side of closure member 60 is fixed on the joining edge for the splicing piece 301 being connected with backrest plate 201 On 3011 (not shown).

Incorporated by reference to Fig. 8 and Fig. 9, be additionally provided on the backrest plate 201 can by closure member 60 cover hide it is foldable Lid closes piece 70.Lid closes piece 70 and is arranged along closure member 60 comprising the one side being fixedly connected with splicing piece 301 and opposite splicing piece 301 and the separately positioned another side of backrest plate 201.Lid closes piece 70 and can turn down along splicing piece 301.When lid closes piece 70 to backrest plate When 201 side fold, the closure member 60 closes piece 70 by lid and hides, when lid, which closes piece 70, to be turned down to the side of splicing piece 301, The closure member 60 exposes.The lid, which closes piece 70, well to be hidden closure member 60, other people is avoided arbitrarily to beat closure member 60 It opens, so that the luggage of storage be taken away, improves safety.Meanwhile the setting that the lid closes piece 70 can also prevent dust well Or water droplet is fallen into inside backpack body 30 from the closure member 60, to guarantee luggage inside backpack body 30 not by external environment shadow It rings.

It is appreciated that one side that lid closes piece 70 can also be fixed on backrest plate 201, another side is with respect to 201 He of backrest plate Backpack body 30 is separately positioned.

Lid closes the both ends that piece 70 is separated with backrest plate 201 or splicing 301 phase of piece and is provided with locating piece 80.The locating piece 80 include mutually matched first part 801 and second part 802, and the first part 801 is fixed on the lid and closes on piece 70, Second part 802 is fixed on backpack body 30 or the position corresponding with first part 801 of backrest plate 201.When the lid closes When the fold of piece 70 is so that the closure member 60 is exposed, the first part 801 of the locating piece 80 and second part 802 cooperate The lid is closed piece 70 to mention portion 20 with the backpack body 30 or the back and be fixedly connected, limitation lid closes piece 70 and freely turns down.

When lid closes the fold of piece 70 so that closure member 60 is exposed, the locating piece 80 positions lid conjunction piece 70, limits It is freely turned down, and is facilitated and is taken out the luggage in backpack body 30 or luggage is put into backpack body 30.

Specifically, the locating piece 80 can be button, a part of locating piece 80 is fixed on lid and closes on piece 70, another portion Divide and is fixed on backrest plate 201 or splicing piece 301.

The foregoing is merely the utility model preferred embodiments, are not intended to limit the utility model, all in this reality With any modification made within novel principle, equivalent replacement and improve etc. should all comprising the protection scope of the utility model it It is interior.

Claims

1. a kind of knapsack, it is characterised in that: the knapsack includes that back mentions portion and backpack body, and the back mentions between portion and the backpack body Parting closes the bottom to be formed for support luggage, and the back, which mentions portion, forms an opening with the part that the backpack body mutually separates, described Back mentions and the opening is provided with closure member for closing the opening between portion and the backpack body, the backpack body include according to The multi-disc of secondary suture splicing splices piece, and the splicing piece includes two joining edges being oppositely arranged, and the backpack body includes that setting exists Scaling part on two joining edges of any splicing piece or on each joining edge of any two panels splicing piece, is arranged two Scaling part on a joining edge cooperates so that backpack body is in contraction state or unfolded state.

2. knapsack as described in claim 1, it is characterised in that: the backpack body includes short transverse and width direction, the spelling The direction of the joining edge of contact pin is consistent with the short transverse of the backpack body；Or direction and the packet of the joining edge of the splicing piece The width direction of body is consistent.

3. knapsack as described in claim 1, it is characterised in that: the scaling part is zipper, and the scaling part includes opposite sets The two parts set, a portion are sewn on the joining edge of the splicing piece, and another part is sewn to same splicing piece On another joining edge or on a joining edge of another splicing piece；Or the scaling part is to tighten rope, the suture of the splicing piece Offer perforating on side, the rope of tightening successively wears wearing of being arranged on each joining edge by the same splicing piece The perforating of any joining edge of hole or any two panels splicing piece；Or the scaling part is button, the half of the scaling part It is fixed on the joining edge of the splicing piece, the other half is fixed on another joining edge of same splicing piece or another splicing On any joining edge of piece.

4. knapsack as described in claim 1, it is characterised in that: the back portion of mentioning includes leaning against with what knapsack person's back was affixed Plate, the backpack body connect close to two pieces of splicing pieces that back mentions portion with the backrest plate part, the splicing to connect with the backrest plate On piece is provided with the first handle, first handle be arranged in the splicing piece far from the side of bottom on, and described first One end of handle is fixed on a splicing on piece, and the other end is fixed on another splicing on piece, the two pieces of spellings to connect with the backrest plate Scaling part is respectively arranged in contact pin, when the two panels splicing piece to connect with the backrest plate is in contraction state, described first Handle is stored by the scaling part to be hidden.

5. knapsack as claimed in claim 4, it is characterised in that: the splicing on piece to connect with the backrest plate is provided with glove The splicing piece is arranged on the side of bottom in bag, the storage bag, and the accommodating chamber of the storage bag exposes to described The surface for splicing piece, when the two panels splicing piece to connect with the backrest plate part is in contraction state, the storage bag is by institute Scaling part storage is stated to hide.

6. knapsack as described in claim 1, it is characterised in that: the closure member is zipper, and the backpack body or the back mention Portion is additionally provided with the lid conjunction piece that can cover the closure member, and it includes opposite two sides, wherein side and the back that the lid, which closes piece, It mentions portion or the backpack body is fixedly connected, the other side is freely arranged with respect to backpack body or the back portion of mentioning, and the lid closes piece can be along described Closure member fold, so that the closure member is exposed or is hidden by lid conjunction piece covering.

7. knapsack as claimed in claim 6, it is characterised in that: the knapsack further includes that limitation lid closes the positioning that piece freely turns down Part, the locating piece include mutually matched first part and second part, and the first part is fixed on the lid and closes on piece, Second part is fixed on backpack body or back mentions on portion position corresponding with first part, when the lid closes piece fold so that institute State closure member it is exposed when, the first part of the locating piece and second part cooperate by the lid close piece and the backpack body or The back portion of mentioning is fixedly connected, and limitation lid closes piece and freely turns down.

8. knapsack as claimed in claim 4, it is characterised in that: the back portion of mentioning further includes being fixedly connected with the backrest plate Harness, the both ends of the harness are separately fixed at the opposite both ends of the backrest plate short transverse, and the back portion of mentioning further includes edge Opening direction is set to the second handle on backrest plate opposing floor portion side.

9. knapsack as claimed in claim 8, it is characterised in that: the backrest plate is provided with collection close to the side of the harness Bag, the collection bag include an accommodating chamber being hidden among the backrest plate and be set to backrest plate outer surface and with accommodating chamber phase Logical opening.

10. knapsack as described in claim 1, it is characterised in that: the arbitrary neighborhood that the backpack body is mutually separated with the back portion of mentioning Two pieces of splicing pieces between be provided with hidden bag, the hidden bag includes a hiding chamber being hidden among the backpack body and is set to Backpack body outer surface and the opening communicated with hiding chamber.