CN110037448A

CN110037448A - A kind of box type school chair

Info

Publication number: CN110037448A
Application number: CN201810052191.4A
Authority: CN
Inventors: 朱文倩; 安俊晔
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-01-15
Filing date: 2018-01-15
Publication date: 2019-07-23

Abstract

The invention discloses a kind of box type school chairs, belong to chair art, including seat plate, backboard, supporting leg, storage tank and universal rolling wheel, storage tank includes the fixation storage box and mobile storage box of box-type shell and its inside, fixed storage box lower end is fixedly attached on the bottom surface of box-type shell, the fixed storage box front is open, convenient for picking and placing books；The closing of box-type shell bottom surface, top surface are open, fixed storage box top surface closing, and there are gap between fixed storage box periphery and box-type shell, mobile storage box is sleeved in gap, and the bottom surface of mobile storage box is open；The lower end of Backside support leg and mobile storage box upper end are designed with universal rolling wheel, and backrest back is rotatably connected to pull rod.The present invention not only serves as bookcase use, moreover it is possible to expand storage space, use as locker, and more can move the internal storing of transport in labour-saving, also can reduce the burden of universal rolling wheel, be conducive to extend the service life of universal rolling wheel；Smart structural design, it is convenient and practical.

Description

A kind of box type school chair

Technical field

The present invention relates to chair arts, are specifically related to a kind of box type school chair.

Background technique

The study books of present student become more and more with the growth of grade, and some reference books are sometimes for being placed on In school, carried on the back without being placed on to carry on the back in school bag daily, but the finite volume of the bookcase of school, drawer, therefore, student is always Books are stacked on the table, builds into a stifled wallette, had both influenced the sight of student, also influence the environment of classroom entirety.

Currently, setting storage tank, can be sufficiently sharp for student's stacking books mostly immediately below seat plate in the prior art With the space under seat plate, and then the desktop upper space and drawer space occupied is reduced, convenient storage is aesthetic in appearance, simple. But they are only able to achieve the function of expanding storage space, when student needs to move books or other storings, the chair body weight It is heavier, it is not easy to move.A kind of box type school tablet chair is disclosed in the patent that Authorization Notice No. is 202714497 U of CN, It is a bookcase in the lower part of chair, the side of bookcase is equipped with the folding door of belt lock catch, and two chair legs of rear side of chair are equipped with rolling Wheel, the chair leg of front side two are enclosed with plastic cement skin.The beneficial effect is that: structure is simple, convenient and practical, can use as bookcase；It answers Used time rolls idler wheel, can move chair when the chair leg of front side two for tilting chair, puts down two chair legs in front side, plastic cement Skin plays fixed chair, convenient for moving the books or other storings of internal storage.If but bookcase in store books or its When his storing is heavier, only the idler wheel in two chair legs on rear side of chair is rolled, and the heavy load of idler wheel is easily damaged, and hand It is more laborious to pull to draw backboard；In addition, it is smaller in the bookcase space of chair below the panel setting, need to be extended improvement.

Summary of the invention

1. technical problems to be solved

The technical problem to be solved in the present invention is that providing a kind of box type school chair, bookcase use is not only served as, also It can deform and expand storage space, be used as locker；More the internal storing of transport can be moved in labour-saving, also can reduce universal rolling The burden of wheel is conducive to extend the service life of universal rolling wheel；Smart structural design, it is convenient and practical.

2. technical solution

To solve the above problems, the present invention adopts the following technical scheme that:

A kind of box type school chair, including seat plate, backboard and supporting leg, the seat plate are arranged right below positioned at each Storage tank on the inside of support leg, two supporting leg lower ends on rear side of the seat plate are equipped with universal rolling wheel, and the storage tank includes Box-type shell and its fixation storage box and mobile storage box of inside, the box-type shell bottom surface closing, top surface are open, described solid Determine storage box lower end to be fixedly attached on the bottom surface of box-type shell, the fixed storage box top surface closing, the fixed storage box There are gap between periphery and box-type shell, the mobile storage box is sleeved on the gap between fixed storage box and box-type shell It is interior, and the bottom surface of mobile storage box is open, the seat plate is installed on the top surface of mobile storage box；The fixed storage box is just Face is open, and the box-type shell and mobile storage box are respectively equipped with switching door one to the fixed positive position of storage box of face and open Door two is closed, is equipped with door lock on the switching door one and switching door two；

The backboard lower end connects with seat plate Backside support leg upper end and their leading flank keeps concordant, described to lean on Backboard and the leading flank of seat plate Backside support leg are equipped with that specification is consistent, the longitudinally-aligned and sliding rail that communicates, and the movement is set The upper and lower side that the back side of object case corresponds to sliding rail on supporting leg is equipped with the sliding part that can be moved up and down on the slide rail, the box shell The two sides of the trailing flank of body are equipped with the strip-shaped hole moved up and down for sliding part, are equipped with block one at the strip-shaped hole upper port, The rear side lower end of the mobile storage box is equipped with block two corresponding with block one, and the back side upper end of the mobile storage box is fixed Have a pulling part, there are the gap for accommodating pulling part between backboard on rear side of the seat plate, on the pulling part with backboard Upper end is respectively equipped with compatible snap component, and the difference in height between two component of snap component is equal to block one and block two Between difference in height；

The universal rolling wheel is set to the rear side of seat plate Backside support leg, and the mobile storage box trailing flank both upper ends thereof is equal It is connected with universal rolling wheel two by connecting shaft, the position that universal rolling wheel two is corresponded on the backboard is equipped with for moving down in connecting shaft Dynamic shifting chute, the backrest back middle part are equipped with the pull rod of insertion backboard, and the pull rod upper end is rotationally connected with backrest Compatible latch components are respectively equipped in the middle part of plate upper end, pull rod lower end and backboard lower end.

Further, it is equipped with handle on the switching door one and switching door two, the handle on the switching door two is recessed Sunken trough body structure.The opening and closing of manual manipulation switching door are convenient in the setting of handle, and because mobile storage box is mounted in case Inside sandwich type element, space is limited, so the handle on switching door two is set as to the trough body structure of recess.

Further, the lower end of the supporting leg is concordant with universal rolling wheel bottom, and the lower surface of the box-type shell is located at The top of universal rolling wheel.The supporting leg being then slightly tilted on rear side of some seat plates, can be driven universal rolling wheel, to reach mobile chair Sub whole purpose, use are more convenient；The lower surface of box-type shell is located at the top of universal rolling wheel, can prevent box-type shell Lower surface contacts ground and wears.

Specifically, the sliding part is idler wheel or sliding block.It is moved using mobile can drive of idler wheel or sliding block on the slide rail Storage box is moved along sliding rail, and this is simple for structure.

Specifically, the pulling part is the stripe board or U-shaped bar that middle part is equipped with through-hole.U-shaped bar or middle part are equipped with through-hole The demand that stripe board is able to achieve convenient for lifting, and this is simple for structure.

Further, the structure of the backboard upper end and the rotation connection of pull rod upper end are as follows: the back side of backboard is equipped with Mounting groove that is longitudinally disposed and passing through backboard upper surface, the mounting groove upper end is equipped with the short shaft across pull rod upper end, institute Pull rod is stated in mounting groove.So set, be accommodated in pull rod can in backboard and biggish degree, make After backboard is laid flat, pull rod is able to rotate to the position at an acute angle with backboard front angle, in order to pull chair whole.

Further, the pull rod is telescopic rod, and the free end of the pull rod is equipped with the handle perpendicular to pull rod, the peace Tankage is " ⊥ " shape, and the position that lower end corresponds to handle is adapted with handle.Pull rod is scalable, convenient for expanding the scope of application, mentions Rise use value；Handle is held for user's hand, consequently facilitating pulling pull rod.

Further, the snap component and latch components are drag hook and pull ring.Drag hook and pull ring, which are able to satisfy, accordingly to be connected The connection requirement of fitting, and it is convenient for disassembly and assembly, convenient for application.

3. beneficial effect

(1) present invention is equipped with storage tank, so that student stacks books, can make full use of the space under seat plate, in turn Reduce the desktop upper space and drawer space occupied, convenient storage；Storage tank includes that box-type shell and its internal fixation are set Object case and mobile storage box, fixed storage box lower end are fixedly attached on the bottom surface of box-type shell, the fixed storage box front Opening, convenient for picking and placing books；The closing of box-type shell bottom surface, top surface are open, fixed storage box top surface closing, fixed storage box periphery There are gap between box-type shell, mobile storage box is sleeved in gap, and the bottom surface of mobile storage box is open, mobile glove Case, which can be drawn upwardly out, to be located above fixed storage box, can place books or other articles in mobile storage box, hence it is evident that expand storage Object space can be used as daily locker；Clever structure can be applied to a variety of scenes.

(2) backboard of the invention and the leading flank of seat plate Backside support leg be equipped with specification it is consistent, it is longitudinally-aligned and The sliding rail communicated, upper and lower side that the back side of mobile storage box corresponds to sliding rail on supporting leg are equipped with and can move up and down on the slide rail Sliding part, the two sides of the trailing flank of box-type shell are equipped with the strip-shaped hole moved up and down for sliding part, set at strip-shaped hole upper port There is block one, the rear side lower end of mobile storage box is equipped with block two corresponding with block one, and the back side upper end of mobile storage box is solid Surely there is a pulling part, be respectively equipped with compatible snap component with backboard upper end on pulling part.In application, pull-up pulling part, sliding Moving part is moved up along sliding rail, until block two is stopped by block one, buckles snap component, that is, is moved storage box and stablized positioned at fixed glove Above case, another material-putting space is provided.The configuration of the present invention is simple, it is easy to operate and more practical.

(3) universal rolling wheel in the present invention is set to the rear side of seat plate Backside support leg, mobile storage box trailing flank upper end It is rotatably connected to pull rod equipped with universal rolling wheel two, and in backrest back, when mobile storage box extraction application or fixed storage box When the article of interior storage is heavier, chair can be fallen, universal rolling wheel and universal rolling wheel two is made to contact ground, backboard is in water Level state, meanwhile, pull rod is turned to the position at an acute angle with backboard front angle, then hold handle, more can easily saved The pulling storage tank of power；The burden that also can reduce universal rolling wheel is conducive to extend the service life of universal rolling wheel.

To sum up, the present invention not only serves as bookcase use, moreover it is possible to expand storage space, use as locker；It can be more The internal storing of transport is moved in labour-saving, also can reduce the burden of universal rolling wheel, is conducive to extend the service life of universal rolling wheel；Knot Structure is ingenious in design, convenient and practical.

Detailed description of the invention

Fig. 1 and Fig. 4 is structural schematic diagram of the invention under different perspectives；

Fig. 2 is the schematic enlarged-scale view of region A in Fig. 1；

Fig. 3 is the schematic enlarged-scale view of region B in Fig. 1；

Fig. 5 is separation (mobile storage box 43 extracts box-type shell 41 out) structural schematic diagram of storage tank 4；

Fig. 6 is the schematic enlarged-scale view of region C in Fig. 5；

Fig. 7 is the schematic enlarged-scale view of region D in Fig. 5.

Appended drawing reference: 1- seat plate, 2- backboard, 3- supporting leg, 4- storage tank, 41- box-type shell, the fixed glove of 42- Case, the mobile storage box of 43-, the gap 44-, 45- switching door one, 46- switching door two, 47- handle, 5- universal rolling wheel, 6- sliding rail, 7- Sliding part, 8- block one, 9- block two, the pulling part 10-, 11- snap component, 12- universal rolling wheel two, 13- pull rod, 14- lock Component, 15- strip-shaped hole, 16- mounting groove, the short shaft of 17-, 18- drag hook, 19- pull ring, 20- door lock, 21- handle, 22- shifting chute, 23- connecting shaft.

Specific embodiment

The present invention is described in further detail with reference to the accompanying drawings and examples.

Embodiment 1

It is described such as Fig. 1, Fig. 4 and a kind of box type school chair shown in fig. 5, including seat plate 1, backboard 2 and supporting leg 3 Seat plate 1 is arranged right below the storage tank 4 positioned at each 3 inside of supporting leg, two 3 lower ends of supporting leg of 1 rear side of seat plate It is equipped with universal rolling wheel 5, the storage tank 4 includes the fixation storage box 42 and mobile storage box of box-type shell 41 and its inside 43,41 bottom surface of the box-type shell closing, top surface are open, and fixed 42 lower end of storage box is fixedly attached to box-type shell 41 On bottom surface, fixed 42 top surface of the storage box closing, there are gaps between fixed 42 periphery of storage box and box-type shell 41 44, the mobile storage box 43 is sleeved in the gap 44 between fixed storage box 42 and box-type shell 41, and mobile storage box 43 bottom surface is open, and the seat plate 1 is installed on the top surface of mobile storage box 43；42 front of fixed storage box is open, The box-type shell 41 and mobile storage box 43 are respectively equipped with one 45 He of switching door to the fixed positive position of storage box 42 of face Switching door 2 46 is equipped with door lock 20 on the switching door 1 and switching door 2 46；

As shown in figure 4,2 lower end of backboard connects with 1 Backside support leg of seat plate, 3 upper end and their leading flank is protected Maintain an equal level neat, the backboard 2 is with the leading flank of 1 Backside support leg 3 of seat plate consistent, longitudinally-aligned equipped with specification and communicates Sliding rail 6；As shown in Figures 5 and 6, the upper and lower side that the back side of the mobile storage box 43 corresponds to sliding rail 6 on supporting leg 3 is equipped with energy The sliding part 7 moved up and down on sliding rail 6, as shown in Figure 5 and 7, the two sides of the trailing flank of the box-type shell 41 are equipped with For the strip-shaped hole 15 that sliding part 7 moves up and down, block 1, the mobile storage box 43 are equipped at 15 upper port of the strip-shaped hole Rear side lower end be equipped with block 29 corresponding with block 1, as shown in figure 4, the back side upper end of the mobile storage box 43 is fixed There is a pulling part 10, there are the gap for accommodating pulling part 10 between 1 rear side of seat plate and backboard 2, on the pulling part 10 It is respectively equipped with compatible snap component 11 with 2 upper end of backboard, the difference in height between 11 liang of components of the snap component is equal to Difference in height between block 1 and block 29；

As shown in Figure 1, the universal rolling wheel 5 is set to the rear side of 1 Backside support leg 3 of seat plate, the mobile storage box 43 Trailing flank both upper ends thereof passes through connecting shaft 23 and is connected with universal rolling wheel 2 12, corresponds to universal rolling wheel 2 12 on the backboard 2 Position be equipped with the shifting chute 22 that moves up and down for connecting shaft 23, the drawing of insertion backboard 2 is equipped in the middle part of 2 back side of backboard Bar 13,13 upper end of pull rod are rotationally connected with 2 upper end of backboard, are respectively equipped in the middle part of 13 lower end of pull rod and 2 lower end of backboard Compatible latch components 14.

For the ease of the opening and closing of manual manipulation switching door, as shown in figure 5, the switching door 1 and switching door two Handle 47 is equipped on 46, the handle 47 on the switching door 2 46 is the trough body structure of recess.Because mobile storage box 43 fills Inside box-type shell 41, space is limited, so the handle 47 on switching door 2 46 is set as to the trough body structure of recess.

For the ease of driving universal rolling wheel 5, as shown in Fig. 1 and Fig. 4, the lower end and 5 bottom of universal rolling wheel of the supporting leg 3 Concordantly, the lower surface of the box-type shell 41 is located at the top of universal rolling wheel 5.Then it is slightly tilted the branch of some 1 rear sides of seat plate Universal rolling wheel 5 can be driven in support leg 3, and to achieve the purpose that mobile chair is whole, use is more convenient；Under box-type shell 41 Surface is located at the top of universal rolling wheel 5, can prevent the lower surface of box-type shell 41 from contacting ground and wearing.

In the present embodiment, the sliding part 7 is idler wheel.Mobile glove is driven using mobile energy of the idler wheel on sliding rail 6 Case 43 is moved along sliding rail 6, and this is simple for structure.

In the present embodiment, the pulling part 10 is the stripe board that middle part is equipped with through-hole.Middle part is equipped with the stripe board of through-hole It is able to achieve the demand convenient for lifting, and this is simple for structure.

In order to which meet pull rod 13 uses and stores demand, 2 upper end of backboard and the rotation connection of 13 upper end of pull rod Structure are as follows: as shown in Figures 1 and 2, the back side of backboard 2 is equipped with mounting groove that is longitudinally disposed and passing through 2 upper surface of backboard 16,16 upper end of mounting groove is equipped with the short shaft 17 across 13 upper end of pull rod, and the pull rod 13 is in mounting groove 16.So Setting, so that pull rod 13 can be accommodated in backboard 2 and biggish degree, so that after backboard 2 is laid flat, pull rod 13 are able to rotate to the position at an acute angle with 2 front angle of backboard, in order to pull chair whole.

In order to make pull rod 13 be more suitable for applying, the pull rod 13 is telescopic rod, as shown in Figures 1 and 3, the pull rod 13 Free end be equipped with perpendicular to pull rod 13 handle 21, the mounting groove 16 be " ⊥ " shape, lower end correspond to handle 21 position and Handle 21 is adapted.Pull rod 13 is scalable, convenient for expanding the scope of application, promotes use value；Handle 21 is held for user's hand, Consequently facilitating pulling pull rod 13.

In the present embodiment, the snap component 11 and latch components 14 are drag hook 18 and pull ring 19.Drag hook 18 and drawing Ring 19 is able to satisfy the connection requirement of corresponding connector, and convenient for disassembly and assembly, convenient for application.

Embodiment 1

The present embodiment difference from example 1 is that:

In the present embodiment, the sliding part 7 is sliding block.Mobile glove is driven using mobile energy of the sliding block on sliding rail 6 Case 43 is moved along sliding rail 6, and this is simple for structure.

In the present embodiment, the pulling part 10 is U-shaped bar.The demand that U-shaped bar is able to achieve convenient for lifting, and structure letter It is single easy.

Other are the same as embodiment 1.

The application content of above-mentioned box type school chair includes:

(1) it is used to store books or other articles

Storage tank 4 is integrally located at 3 inside of supporting leg, successively opens switching door 1 and switching door 2 46, because fixation is set 42 front of object case is open, and books or other storage articles can be placed in fixed storage box 42, then successively shut switching door 2 46 and switching door 1, and lock door lock 20.At this point, using as bookcase, the application of seat plate 1 is not influenced.If hand Dynamic to hold the pull-up of pulling part 10, the mobile related seat plate 1 of storage box 43 moves up, and sliding part 7 is moved up along sliding rail 6, until Block 29 is stopped by block 1, at this point, snap component 11 can just be buckled, that is, moves storage box 43 and stablizes positioned at fixed glove 42 top of case, opens switching door 2 46, can place article to be handled in mobile storage box 43, hence it is evident that storage space is expanded, It is applicable as locker.

(2) it is used to carry books or other articles

As it is above-mentioned article to be handled is placed in fixed storage box 42 after, if fixed 42 space of storage box is contained enough wait remove Article is transported, then can directly be tilted supporting leg 3, then drags 2 direct pull storage tank 4 of backboard, or unlock latch components 14 and rotating tension bar 13 to the position parallel with backboard 2, then hold handle 21 and pull storage tank 4.If fixed storage box 42 is empty Between be not enough to contain article to be handled, then hold the pull-up of pulling part 10 manually, the mobile related seat plate 1 of storage box 43 is to moving up Dynamic, sliding part 7 is moved up along sliding rail 6, until block 29 is stopped by block 1, at this point, snap component 11 can just be buckled, i.e., Mobile storage box 43, which is stablized, is located at fixed 42 top of storage box, opens switching door 2 46, can be placed in mobile storage box 43 to Carry article, hence it is evident that expand storage space；During mobile storage box 43 moves up, universal rolling wheel 2 12 is along moving Slot 22 is moved upward to 2 top of backboard, and then chair fell, even if universal rolling wheel 5 and universal rolling wheel 2 12 are contiguously Face, backboard 2 are in horizontality, meanwhile, pull rod 13 is turned to the position at an acute angle with 2 front angle of backboard, then hand Handle 21 pulls storage tank 4.

As shown in the above, the present invention not only serves as bookcase use, moreover it is possible to expand storage space, make as locker With；More the internal storing of transport can be moved in labour-saving, also can reduce the burden of universal rolling wheel 5, be conducive to extend universal rolling wheel 5 Service life；Smart structural design, it is convenient and practical.

Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention, And be not used as limitation of the invention, as long as the change in spirit of the invention, to embodiment described above Change, modification will all be fallen in scope of the presently claimed invention.

Claims

1. a kind of box type school chair, including seat plate (1), backboard (2) and supporting leg (3), seat plate (1) underface is set There is the storage tank (4) being located on the inside of each supporting leg (3), two supporting leg (3) lower ends on rear side of the seat plate (1) are equipped with ten thousand Way roller (5), which is characterized in that the storage tank (4) include box-type shell (41) and its inside fixation storage box (42) and Mobile storage box (43), box-type shell (41) the bottom surface closing, top surface are open, and fixed storage box (42) lower end attaches solid Be scheduled on the bottom surface of box-type shell (41), fixed storage box (42) the top surface closing, fixed storage box (42) periphery with There are gap (44) between box-type shell (41), the mobile storage box (43) is sleeved on fixed storage box (42) and box-type shell (41) in the gap (44) between, and the bottom surface of mobile storage box (43) is open, and the seat plate (1) is installed on mobile storage box (43) on top surface；Fixed storage box (42) front is open, and the box-type shell (41) and mobile storage box (43) are to just Switching door one (45) and switching door two (46), the switching door one (45) are respectively equipped with to fixed storage box (42) positive position With door lock (20) are equipped on switching door two (46)；

Backboard (2) lower end connects with seat plate (1) Backside support leg (3) upper end and their leading flank keeps concordant, It is consistent, longitudinally-aligned and communicate that the backboard (2) and the leading flank of seat plate (1) Backside support leg (3) are equipped with specification Sliding rail (6), the upper and lower side that the back side of the mobile storage box (43) corresponds to sliding rail (6) on supporting leg (3) is equipped with can be in sliding rail (6) two sides of the sliding part (7) moved up and down on, the trailing flank of the box-type shell (41) are equipped with for sliding part (7) up and down Mobile strip-shaped hole (15) is equipped with block one (8), the rear side of the mobile storage box (43) at strip-shaped hole (15) upper port Lower end is equipped with block two (9) corresponding with block one (8), and the back side upper end of the mobile storage box (43) is fixed with pulling part (10), there are the gap for accommodating pulling part (10), the pulling parts (10) between backboard (2) on rear side of the seat plate (1) Upper and backboard (2) upper end is respectively equipped with compatible snap component (11), the height between (11) two component of snap component Degree difference is equal to the difference in height between block one (8) and block two (9)；

The universal rolling wheel (5) is set to the rear side of seat plate (1) Backside support leg (3), mobile storage box (43) trailing flank Both upper ends thereof passes through connecting shaft (23) and is connected with universal rolling wheel two (12), corresponds to universal rolling wheel two on the backboard (2) (12) position is equipped with the shifting chute (22) moved up and down for connecting shaft (23), is equipped with insertion in the middle part of backboard (2) back side The pull rod (13) of backboard (2), pull rod (13) upper end are rotationally connected with backboard (2) upper end, pull rod (13) lower end with lean on Compatible latch components (14) are respectively equipped in the middle part of backboard (2) lower end.

2. a kind of box type school chair according to claim 1, which is characterized in that the switching door one (45) and switching door two (46) it is equipped on handle (47), the handle (47) on the switching door two (46) is the trough body structure of recess.

3. a kind of box type school chair according to claim 1, which is characterized in that the lower end of the supporting leg (3) with it is universal Idler wheel (5) bottom is concordant, and the lower surface of the box-type shell (41) is located at the top of universal rolling wheel (5).

4. a kind of box type school chair according to claim 1, which is characterized in that the sliding part (7) is idler wheel or sliding block.

5. a kind of box type school chair according to claim 1, which is characterized in that the pulling part (10) is middle part equipped with logical The stripe board or U-shaped bar in hole.

6. a kind of box type school chair according to claim 1, which is characterized in that backboard (2) upper end and pull rod (13) structure of upper end rotation connection are as follows: the back side of backboard (2) is equipped with longitudinally disposed and passes through backboard (2) upper surface Mounting groove (16), mounting groove (16) upper end are equipped with the short shaft (17) across pull rod (13) upper end, pull rod (13) dress In mounting groove (16).

7. a kind of box type school chair according to claim 6, which is characterized in that the pull rod (13) is telescopic rod, described The free end of pull rod (13) is equipped with the handle (21) perpendicular to pull rod (13), and the mounting groove (16) Wei " Shang " shape, lower end pair The position of handle (21) is answered to be adapted with handle (21).

8. a kind of box type school chair according to claim 1, which is characterized in that the snap component (11) and latch components It (14) is drag hook (18) and pull ring (19).