CN210760372U

CN210760372U - Neck pillow structure

Info

Publication number: CN210760372U
Application number: CN201921201183.8U
Authority: CN
Inventors: 何日中
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-23
Filing date: 2019-07-27
Publication date: 2020-06-16
Anticipated expiration: 2029-07-27
Also published as: CN110406444A; CN110406444B

Abstract

The utility model discloses a neck pillow structure relates to car articles for use technical field, and its technical scheme main points are: including the neck pillow body, be connected with the gooseneck on the neck pillow body, the one end that the neck pillow body was kept away from to the gooseneck is provided with and is used for installing fixed mounting bracket, still is provided with the support frame on the neck pillow body, and the gooseneck is connected on the support frame right the neck pillow body supports. The gooseneck of this neck pillow structure can be towards the crooked arbitrary orientation, can satisfy the user to the various demands of neck pillow body position to reach best comfort level, and the adjustment is convenient, satisfies the needs of in-service use. By arranging the rotating seat and the rotating part, a user can adjust the angle of the neck pillow body through the adjusting assembly so as to further enlarge the adjustable range of the neck pillow structure; by arranging the first clamping piece and the second clamping piece, the mounting frame can be matched with connecting rods with different intervals on different seats; through setting up the screw thread section, the dismouting of gooseneck and mounting bracket, support frame is all comparatively convenient.

Description

Neck pillow structure

Technical Field

The utility model relates to an automotive articles technical field, in particular to neck pillow structure.

Background

A neck pillow is a pillow used for supporting the neck of a user. In the car, the neck pillow is often used for fixing on two connecting rods between the back of seat and head rest, and the space between user's neck and seat has been filled to the neck pillow, can improve the comfort.

As shown in fig. 1, the seat and the neck pillow in the prior art include a backrest and a headrest, the backrest and the headrest are connected by two connecting rods, and the headrest can adjust the distance between the headrest and the backrest by sliding on the connecting rods. The neck pillow includes neck pillow body 1, two fasteners 10 and two connecting pieces 101, and two connecting pieces 101 are connected two fasteners 10 and neck pillow body 1 respectively, and fastener 10 is fixed through the connecting rod joint of draw-in groove and seat to be fixed in on the seat with neck pillow body 1.

Another type of existing neck pillow is generally fixed outside two connecting rods between the backrest and the headrest through elastic belts or magic tapes.

The above prior art solution has the following drawbacks: the neck pillow is installed behind the seat, and the position of neck pillow is fixed promptly, but user's height, position of sitting, the sore position of neck all probably are different, and when personnel need the neck pillow to support required position, current neck pillow is difficult to adjust according to user's actual demand.

SUMMERY OF THE UTILITY MODEL

To the deficiency that prior art exists, an object of the utility model is to provide a neck pillow structure, it has the convenient advantage of adjusting of neck pillow body position.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a neck pillow structure, includes the neck pillow body, be connected with the gooseneck on the neck pillow body, the one end that the neck pillow body was kept away from to the gooseneck is provided with and is used for installing fixed mounting bracket.

Through above-mentioned technical scheme, during the use, earlier with mounting bracket fixed connection on the connecting rod of seat for the front end of neck pillow body orientation seat owing to connect through the gooseneck, can adjust the angle and the position of neck pillow body through the gooseneck of buckling, because when the people sat on the seat, the dynamics that people's neck leaned on the neck pillow body was little, and the enough bearing people of intensity of gooseneck leaned on the neck pillow body. Through this neck pillow structure, the user can order about the gooseneck hard and crooked towards arbitrary direction, can satisfy the user to the various demands of neck pillow body position to reach best comfort level, and the position control of neck pillow body is very convenient, satisfies the needs of in-service use.

Preferably, still be provided with the support frame on the neck pillow body, the gooseneck is connected on the support frame right the neck pillow body supports.

Through above-mentioned technical scheme, the support frame can support the neck and rest on one side that the body is close to the mounting bracket, rests on the body through the support frame and forms the support to the neck, has reduced the condition that the people leads to the neck to rest on the body and rest on the neck and rest on the body, and the gooseneck is connected on the support frame simultaneously for the connection of gooseneck is more firm.

Preferably, the support frame is the setting of C shape, the gooseneck is provided with two, and every the gooseneck is connected respectively in the both sides position of mounting bracket and support frame.

Through above-mentioned technical scheme, the neck pillow body is partly surrounded and formed the support by the support frame of C shape to make the structure of neck pillow body more stable, carry out both sides through two gooseneck pipes in addition and fix, make the atress of neck pillow body both sides more even, more stable when the neck pillow body uses.

Preferably, the support frame further comprises an adjusting assembly, and the gooseneck is rotatably connected with the support frame through the adjusting assembly.

Through above-mentioned technical scheme, the user can adjust the angle of neck pillow body through adjusting part to further enlarge the adjustable range of this neck pillow structure.

Preferably, the adjusting component comprises a rotating part arranged on the supporting frame and a rotating seat which is connected to the gooseneck and is correspondingly and rotatably matched with the rotating part on the supporting frame.

Through above-mentioned technical scheme, set up rotation portion and rotate the seat, the support frame can rotate through the relative gooseneck of cooperation of rotation portion and rotation seat for the neck pillow body on the support frame can rotate with the gooseneck relatively.

Preferably, the one end that the seat is close to the rotation portion of rotating has seted up the circular slot, a plurality of spacing grooves have evenly been seted up along circumference to the circular slot lateral wall, the spacing groove is the circular arc groove setting, just the spacing groove is slick and sly transition setting with the circular slot lateral wall, the rotation portion rotate connect in the circular slot, the outside of rotation portion is provided with and is used for imbedding the spacing groove carries out the stopper of fixing a position, the stopper pass through the elastic rod with the rotation portion is connected.

Through the technical scheme, when the angle of the neck pillow body needs to be adjusted, the rotating seat is rotated through rotation, so that the limiting block on the rotating part is separated from the current limiting groove and is embedded into another limiting groove to be positioned, and the adjustment of the angle of the neck pillow body is achieved. Spacing effect can be produced between stopper and spacing groove, and personnel need the torsion of certain size just can order about to rotate seat, rotation portion and produce the rotation, then rotate seat, rotation portion and be difficult for spontaneous the production rotation between.

Preferably, the coaxial through-hole of having seted up in the rotation portion, rotate the seat correspond be provided with the through-hole rotates the runner assembly who connects in the rotation portion, runner assembly include a plurality of coaxial distribution in rotate the elastic connection portion of seat, set up and keep away from in elastic connection portion rotate the spacing portion of seat one end, after elastic connection portion corresponds wears to establish the through-hole, spacing portion is used for contradicting and deviates from the through-hole in the opposite side restriction elastic connection portion of rotation portion.

Through above-mentioned technical scheme, rotate the seat and rotate the portion through runner assembly and rotate and link to each other, when needs are assembled rotating seat and rotation portion, can press spacing portion and be close to each other for distance between the spacing portion is less than the through-hole, then makes spacing portion pass the through-hole, and after spacing portion passed the through-hole, spacing portion kept away from each other under elastic connection portion's elasticity effect, and one side that makes spacing portion be close to rotation portion supports tightly to form spacingly on rotation portion. Through setting up the runner assembly, the installation of gooseneck and support frame is comparatively convenient, and both are difficult for spontaneous breaking away from after the installation is accomplished.

Preferably, the two ends of the gooseneck are provided with thread sections, and the gooseneck is screwed up and fixed through nuts after penetrating through the support frame and the mounting frame.

Through above-mentioned technical scheme, the gooseneck is fixed through the nut to make the installation or the change of gooseneck more convenient.

Preferably, the support frame and the mounting bracket are provided with mounting grooves for mounting nuts on one sides far away from the gooseneck, and the mounting grooves are provided with plugs for sealing the notches of the mounting grooves.

Through the technical scheme, the sealing performance can be further enhanced through the plug, dust and the like are prevented from entering the mounting groove, and the cleanness is kept favorably; in addition, the nut is hidden by the mounting groove and the plug, so that the appearance is improved, and the collision condition of the nut or the thread section in use is reduced; the plug also can restrict the nut and break away from the mounting groove spontaneously, improves the installation steadiness of gooseneck and support frame (or mounting bracket).

Preferably, the mounting frame comprises a first clamping piece and a second clamping piece, the first clamping piece comprises two parallel first clamping plates and a first connecting part which is connected with one end of the two first clamping plates at the same side, and the second clamping piece comprises two parallel second clamping plates and a second connecting part which is connected with one end of the two second clamping plates at the same side; the outer side of the second clamping piece is sleeved with the first clamping piece in a splicing mode to form a ring shape, two opposite sides of the first clamping plate are provided with first clamping teeth, the first clamping teeth are arranged towards the first connecting portion in an inclined mode, two sides, away from each other, of the second clamping plates are respectively provided with second clamping teeth embedded with the first clamping teeth, and the second clamping teeth are arranged towards the second connecting portion in an inclined mode.

Through the technical scheme, the first clamping piece and the second clamping piece are fixed together through the embedding of the first clamping tooth and the second clamping tooth, and the mounting frame can be mounted on the connecting rod of the seat to be fixed through the connection of the first clamping piece and the second clamping piece. After first fastener and second fastener are close to each other, the cooperation of first latch and second latch has restricted first fastener and second fastener and has kept away from each other, and this installing support can the different connecting rods of interval on the different seats of adaptation.

To sum up, the utility model discloses the beneficial effect who contrasts in prior art does:

1. by arranging the gooseneck, the position of the neck pillow body can be adjusted in any direction, and the adjustment is convenient, so that the actual use requirement is met;

2. by arranging the rotating seat and the rotating part, a user can adjust the angle of the neck pillow body through the adjusting assembly so as to further enlarge the adjustable range of the neck pillow structure;

3. by arranging the first clamping piece and the second clamping piece, the mounting frame can be matched with connecting rods with different intervals on different seats;

4. through setting up the screw thread section, the dismouting of gooseneck and mounting bracket, support frame is all comparatively convenient.

Drawings

FIG. 1 is a schematic view of a conventional seat and neck pillow;

FIG. 2 is an overall schematic view of a neck pillow structure according to an embodiment;

FIG. 3 is a schematic partial explosion view of an embodiment;

FIG. 4 is a cross-sectional view of a mount of an embodiment;

fig. 5 is an exploded view of the conditioning assembly of the embodiment.

Reference numerals: 1. a neck pillow body; 10. a fastener; 101. a connecting member; 2. a gooseneck; 3. a mounting frame; 31. a first clip member; 311. a first clamping plate; 312. a first connection portion; 32. a second clip member; 321. a second clamping plate; 322. a second connecting portion; 5. a first latch; 6. a second latch; 7. a support frame; 8. an adjustment assembly; 81. a rotating seat; 82. a rotating part; 9. a circular groove; 91. a limiting groove; 11. a limiting block; 12. an elastic rod; 13. a through hole; 14. a rotating assembly; 141. an elastic connection portion; 142. a limiting part; 15. a protective sleeve; 16. a threaded segment; 17. a nut; 18. mounting grooves; 19. a plug; 20. a notch groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 2, a neck pillow structure comprises a neck pillow body 1, a gooseneck 2 and a mounting rack 3. The gooseneck 2 is also called a coil pipe and a metal shaping hose, the gooseneck 2 is a metal piece which can be bent at will and determines the direction, and the gooseneck 2 is commonly used as a table lamp hose. The gooseneck 2 is provided with two, and two gooseneck 2 are used for connecting neck pillow body 1 and mounting bracket 3.

During the use, earlier with mounting bracket 3 fixed connection on the connecting rod of seat for the front end setting of neck pillow body 1 orientation seat owing to connect through gooseneck 2, can adjust the angle and the position of neck pillow body 1 through gooseneck 2 of buckling, because the people sits when the seat, driver when being special, the dynamics that people's neck leaned on neck pillow body 1 is little, and the enough bearing people of intensity of gooseneck 2 leans on the condition of neck pillow body 1. In actual use, a thicker gooseneck 2 can be selected according to actual conditions to increase the supporting force.

The mounting bracket 3 can be fixed by binding a rope, also can be fixed by magic tape, and can also be fixed on a connecting rod which is correspondingly clamped to the seat through a clamping groove. In this embodiment, as shown in fig. 2 and 4, the mounting frame 3 includes a first clip 31 and a second clip 32, and the first clip 31 is sleeved on the outer side of the second clip 32 and is spliced to form a ring shape. The first clamping piece 31 comprises two parallel first clamping plates 311 and a first connecting part 312 which is connected with one end of the two first clamping plates 311 on the same side; the second clip member 32 comprises two parallel second clip plates 321 and a second connecting part 322 for connecting one end of the two second clip plates 321 on the same side. The first connecting portions 312 and the second connecting portions 322 are both arc-shaped, and when the two first snap-gauge 311 or the two second snap-gauge 321 are stressed to be close to or far away from each other, the corresponding first connecting portions 312 or the corresponding second connecting portions 322 can be elastically deformed correspondingly.

Two relative one sides of first cardboard 311 all are provided with first latch 5, and first latch 5 sets up towards first connecting portion 312 slope, and first latch 5 is close to the first cardboard 311 of one side perpendicular to of first connecting portion 312, and one side that first connecting portion 312 was kept away from to first latch 5 inclines towards the direction of keeping away from first connecting portion 312. One side that two second cardboard 321 deviate from each other all is provided with the second latch 6 that inlays mutually with first latch 5, and second latch 6 inclines towards second connecting portion 322 and sets up, specifically is one side perpendicular to second cardboard 321 that second latch 6 is close to second connecting portion 322, and one side that second connecting portion 322 were kept away from to second latch 6 inclines towards the direction of keeping away from second connecting portion 322.

When the mounting frame 3 needs to be mounted on two connecting rods of a seat, the first clamping piece 31 and the second clamping piece 32 are sleeved from two opposite sides of the two connecting rods respectively, so that the two connecting rods are positioned in an annular surrounded by the first clamping piece 31 and the second clamping piece 32, then the first clamping piece 31 and the second clamping piece 32 are pressed by external force to enable the first clamping piece 31 and the second clamping piece 32 to be close to each other, and at the moment, the two second clamping plates 321 can deform along the elastic force of the second connecting part 322 under the action of inclined surfaces corresponding to the first clamping tooth 5 and the second clamping tooth 6, so that the two second clamping plates 321 can be close to each other; meanwhile, the two first clamping plates 311 can deform along the elastic force of the first connecting portion 312, so that the first clamping pieces 31 and the second clamping pieces 32 are close to each other, and after the first connecting portion 312 and the second connecting portion 322 respectively abut against the two connecting rods of the seat, the first clamping pieces 31 and the second clamping pieces 32 cannot be far away under the limiting action of one side, perpendicular to the first clamping plates 311 and the second clamping plates 321, of the clamping teeth.

When needs are split mounting bracket 3, need press from two second cardboard 321 outsides for second cardboard 321 and the separation of first cardboard 311, make simultaneously first latch 5 and second latch 6 no longer block with, can directly drive first fastener 31 and second fastener 32 this moment and keep away from each other and carry out the split, also can carry out the split through misplacing first fastener 31 and second fastener 32 from top to bottom.

As shown in fig. 3, the neck pillow body 1 is further provided with a support frame 7, the support frame 7 is arranged in a C shape, the rear end face of the neck pillow body 1 is clamped into the support frame 7, and the front end face of the neck pillow body 1 protrudes out of the support frame 7. In practical use, the supporting frame 7 can also be arranged in a flat shape, and the rear end surface of the neck pillow body 1 is directly fixed on the plane of the supporting frame 7. Support frame 7 mainly used supports neck pillow body 1, prevents that neck pillow body 1 from being pressed to be out of shape, guarantees that neck pillow body 1 has better bearing effect.

As shown in fig. 2 and 3, two gooseneck pipes 2 are respectively connected to the mounting frame 3 and the supporting frame 7 at two longitudinal sides. Still including adjusting part 8 on the support frame 7, adjusting part 8 is provided with two and corresponds with two gooseneck 2 respectively and is connected, and gooseneck 2 rotates through adjusting part 8 with support frame 7 and is connected.

As shown in fig. 5, each adjustment assembly 8 comprises a rotating portion 82 disposed on the supporting frame 7, and a rotating seat 81 connected to the gooseneck 2, wherein the rotating seat 81 is rotatably engaged with the corresponding rotating portion 82 of the supporting frame 7. In actual use, the rotatable base 81 and the rotatable portion 82 may be replaced with each other.

The round groove 9 is opened to the one end that rotates seat 81 and is close to rotation portion 82, and a plurality of spacing grooves 91 have evenly been seted up along circumference to the round groove 9 lateral wall, and spacing groove 91 is the circular arc groove setting, and spacing groove 91 and round groove 9 lateral wall are rounding off and set up. The rotating portion 82 is rotatably connected in the circular groove 9, the rotating portion 82 further comprises a limiting block 11, the limiting block 11 is arranged on the radial outer side of the rotating portion 82, and two limiting blocks 11 are evenly arranged along the circumferential direction of the rotating portion 82. Each stopper 11 is connected to the rotating portion 82 through an elastic rod 12, respectively. In this embodiment, the rotating portion 82 is provided in a circular shape, and the elastic rod 12 is formed by forming an inclined notch groove 20 in the rotating portion 82. The side of the limiting block 11 away from the rotating portion 82 is arc-shaped, and the limiting block 11 can be embedded into the limiting groove 91 for positioning.

The rotating part 82 is coaxially provided with a through hole 13, and the rotating seat 81 is correspondingly provided with a rotating assembly 14 which is rotatably connected with the through hole 13 on the rotating part 82. The rotating assembly 14 includes a plurality of elastic connection portions 141 coaxially distributed on the rotating base 81, and a limiting portion 142 disposed at an end of the elastic connection portion 141 far from the rotating base 81. The elastic connecting portion 141 and the rotation axis of the rotation portion 82 are coaxially arranged, the limiting portion 142 extends in the direction away from the rotation axis, after the elastic connecting portion 141 correspondingly penetrates through the through hole 13, the limiting portion 142 is used for abutting against the other side of the rotation portion 82, and the limiting portion 142 limits the elastic connecting portion 141 to be separated from the through hole 13.

When the rotating seat 81 and the rotating portion 82 need to be assembled, the limiting portions 142 can be pressed to be close to each other, so that the distance between the limiting portions 142 is smaller than the through hole 13, then the limiting portions 142 penetrate through the through hole 13, after the limiting portions 142 penetrate through the through hole 13, the limiting portions 142 are far away from each other under the elastic action of the elastic connecting portions 141, and one side, close to the rotating portion 82, of the limiting portions 142 abuts against the rotating portion 82 to form limiting. After the rotating seat 81 and the rotating portion 82 are installed, a pre-tightening force is provided between the limiting block 11 and the groove wall of the limiting groove 91, and a person needs a certain amount of torque force to drive the rotating seat 81 and the rotating portion 82 to rotate.

As shown in fig. 3, the gooseneck 2 is made of stainless steel, the gooseneck 2 is guaranteed to have enough bending resistance according to the diameter, the gooseneck 2 further comprises a protective sleeve 15 which is sleeved on the outer side wall of the gooseneck 2, the protective sleeve 15 can be a rubber sleeve or a cloth sleeve, the gooseneck 2 is coated by the protective sleeve 15, and the ice-cold feeling of the gooseneck 2 directly contacting with a human body is reduced. In addition, the protective sheath 15 may further protect the gooseneck 2. Both ends of gooseneck 2 all are provided with screw thread section 16, and gooseneck 2 wears to establish behind support frame 7 and the mounting bracket 3 and screws up fixedly through nut 17. The mounting groove 18 that supplies nut 17 to install is all seted up to one side that support frame 7 and mounting bracket 3 kept away from gooseneck 2, and the shape of mounting groove 18 corresponds with nut 17, and nut 17 can't rotate in mounting groove 18, is provided with the stopper 19 that seals the 18 notches of mounting groove on the mounting groove 18, and stopper 19 also can restrict nut 17 and spontaneous break away from the mounting groove.

The use method of the neck pillow structure comprises the following steps: firstly, the mounting frame 3 is mounted on a connecting rod of a seat, after the first clamping piece 31 and the second clamping piece 32 are mounted on the connecting rod, a person can drive the headrest of the seat to move towards the backrest direction, so that the headrest and the backrest clamp the first clamping piece 31 and the second clamping piece 32 between the headrest and the backrest, and the first clamping piece 31 and the second clamping piece 32 are limited to be separated along the length direction of the connecting rod. Then the neck pillow body 1 is connected to the gooseneck 2 through the support frame 7, and the installation of the neck pillow structure is completed.

The user can be according to self needs, through the position of the mode adjustment neck pillow body 1 of the gooseneck 2 of buckling, and gooseneck 2 can be crooked towards arbitrary direction, can satisfy the user to the various demands of neck pillow body 1 position to reach best comfort level. In addition, the user can further adjust the angle of the neck pillow body 1 through the adjusting component 8, so as to further enlarge the adjustable range of the neck pillow structure; in a normal use state, the gooseneck 2 is not easy to bend spontaneously, and the rotating seat 81 and the rotating part 82 are not easy to rotate spontaneously.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a neck pillow structure, includes neck pillow body (1), its characterized in that: a gooseneck (2) is connected to the neck pillow body (1), and a mounting frame (3) for mounting and fixing is arranged at one end, far away from the neck pillow body (1), of the gooseneck (2); still be provided with support frame (7) on neck pillow body (1), it is right on support frame (7) that gooseneck (2) are connected neck pillow body (1) supports.

2. A neck pillow structure according to claim 1, wherein: the support frame (7) is C-shaped, the gooseneck (2) is provided with two gooseneck pipes, and each gooseneck (2) is connected to the two side positions of the mounting frame (3) and the support frame (7) respectively.

3. A neck pillow structure according to claim 2, wherein: still including adjusting part (8) on support frame (7), gooseneck (2) with support frame (7) are through adjusting part (8) rotate the connection.

4. A neck pillow structure according to claim 3, wherein: the adjusting component (8) comprises a rotating part (82) arranged on the support frame (7), and a rotating seat (81) which is connected on the gooseneck (2) and is in corresponding rotating fit with the rotating part (82) on the support frame (7).

5. A neck pillow structure according to claim 4, wherein: rotate seat (81) and be close to the one end of rotating portion (82) and seted up circular slot (9), a plurality of spacing grooves (91) have evenly been seted up along circumference to circular slot (9) lateral wall, spacing groove (91) are the circular arc groove setting, just spacing groove (91) are the rounding off setting with circular slot (9) lateral wall, rotating portion (82) rotate connect in circular slot (9), the outside of rotating portion (82) is provided with and is used for the embedding spacing groove (91) carry out stopper (11) of fixing a position, stopper (11) through elastic rod (12) with rotating portion (82) are connected.

6. A neck pillow structure according to claim 4, wherein: through-hole (13) have been seted up to the coaxial on rotation portion (82), rotate seat (81) correspond be provided with through-hole (13) rotate rotating assembly (14) of connecting on rotation portion (82), rotating assembly (14) include a plurality of coaxial distribution in elastic connecting portion (141) of rotating seat (81), set up and keep away from in elastic connecting portion (141) rotate spacing portion (142) of seat (81) one end, after through-hole (13) are worn to establish in elastic connecting portion (141) correspondence, spacing portion (142) are used for contradicting and are deviate from through-hole (13) in opposite side restriction elastic connecting portion (141) of rotation portion (82).

7. A neck pillow structure according to claim 1, wherein: both ends of gooseneck (2) are provided with screw thread section (16), gooseneck (2) wear to establish behind support frame (7) and mounting bracket (3) and screw up fixedly through nut (17).

8. A neck pillow structure according to claim 7, wherein: support frame (7) and mounting bracket (3) keep away from one side of gooseneck (2) and all offer mounting groove (18) that supply nut (17) to install, be provided with stopper (19) that seal mounting groove (18) notch on mounting groove (18).

9. A neck pillow structure according to any one of claims 1-8, wherein: the mounting frame (3) comprises a first clamping piece (31) and a second clamping piece (32), the first clamping piece (31) comprises two parallel first clamping plates (311) and a first connecting part (312) for connecting one end of each of the two first clamping plates (311) at the same side, and the second clamping piece (32) comprises two parallel second clamping plates (321) and a second connecting part (322) for connecting one end of each of the two second clamping plates (321) at the same side;

the outside concatenation that second fastener (32) were located to first fastener (31) cover forms the circularity, two the relative one side of first cardboard (311) all is provided with first latch (5), first latch (5) slope setting towards first connecting portion (312), two one side that second cardboard (321) deviates from each other is provided with respectively with second latch (6) that first latch (5) inlayed mutually, second latch (6) slope setting towards second connecting portion (322).