CN107892060B

CN107892060B - Storage device

Info

Publication number: CN107892060B
Application number: CN201710924303.6A
Authority: CN
Inventors: 郭动; 陈忠峻; 李忠强
Original assignee: Qingdao Haier Co Ltd
Current assignee: Haier Smart Home Co Ltd
Priority date: 2015-09-11
Filing date: 2015-09-11
Publication date: 2020-07-24
Anticipated expiration: 2035-09-11
Also published as: CN107719847B; CN107972955A; CN105292681A; CN105292681B; CN107972955B; CN107892060A; CN107719847A

Abstract

The invention provides a storage device, which comprises a cover body and a box body, wherein the box body comprises a side wall provided with a flexible part which can stretch out and draw back along the height direction of the box body; the adjusting device comprises at least one pair of height-adjusting components respectively arranged on two opposite side walls of the box body and a driving component arranged on the cover body and used for driving the height-adjusting components; the driving assembly comprises a synchronous belt for driving the height-adjusting assembly and a shifting sheet for driving the synchronous belt to rotate; the cover body is also provided with a locking mechanism for locking the synchronous belt when the cover body is opened; the locking mechanism comprises a locking block with a notch and a clamping block with a bulge matched with the notch; the synchronous belt is positioned between the locking block and the clamping block; therefore, after the cover body is opened, the notch is matched with the bulge of the clamping block to clamp the synchronous belt to limit the movement of the synchronous belt, so that the height-adjusting assembly and the driving assembly are kept in a matching state when the cover body is opened, and the cover body and the box body are convenient to assemble.

Description

Storage device

This application is a divisional application based on the invention patent application with application number 201510577670.4 filed on 11/09/2015, entitled "storage device".

Technical Field

The present invention relates to a storage device, and more particularly, to a storage device which can be adjusted in height according to the amount of stored articles and is easy to assemble.

Background

In daily life, since the volume of a general storage device is not variable, the following situations are often encountered: after the articles are placed in the storage device, although the storage device is not filled with the articles, the storage space for placing the storage device is insufficient; or the articles are large, and the space in the storage device is insufficient, so that the articles cannot be accommodated in the storage device.

The existing storage device capable of adjusting the height according to the amount of stored articles is generally realized by the following methods: (1) a telescopic expansion container is additionally arranged on the box body; when a large number of stored articles are stored, the expansion size of the expansion container is adjusted according to the requirement; (2) the side wall of the box body is set to be a thread-shaped section which can stretch out and draw back along the height direction, and the height of the side wall is manually adjusted according to the size of the stored articles.

Chinese patent No. CN2777455Y discloses that the height of the box body can be adjusted by manually lifting or pressing the telescopic part. The method has artificial error in adjustment, the box body is easy to incline, and the telescopic part is made of flexible materials and is easy to generate shrinkage under the action of gravity of the cover body and the like.

Chinese patent No. CN1971174A discloses a technical solution of expanding the storage space of a storage container by providing a retractable expansion container at the lower part of the storage container. This patent sets up the ratch with gear matched with through being equipped with the gear on storage container, in one side of extension container, drives the gear through the motor and adjusts the height of flexible part along the direction of height up-and-down motion of ratch. The structure has higher cost and the height of the telescopic part can not be synchronously adjusted because the toothed bar and the gear matching component are only arranged on one side of the expansion container.

Chinese patent No. CN204006890U discloses that the height of the telescopic part is adjusted by the cooperation of the telescopic rod, i.e. the inner rod fixed on the outer wall of the upper end of the box body and provided with the elastic block, and the outer rod fixed on the inner wall of the lower end of the box body and provided with the slot hole matched with the elastic block. The telescopic part of the structure is smaller than the upper end and the lower end of the box body, the universality is poor, and the structure is not suitable for a common storage device.

In view of the above, there is a need to improve the conventional storage device to solve the above problems.

Disclosure of Invention

The object of the present invention is to provide a storage device which can be adjusted in height according to the amount of stored articles and which is easy to assemble.

In order to achieve the purpose, the invention provides a storage device, which comprises a cover body and a box body, wherein the box body comprises a bottom wall and a side wall extending upwards from the bottom wall, the side wall is provided with a flexible part capable of stretching along the height direction of the box body, and the storage device further comprises an adjusting device for adjusting the height of the flexible part; the adjusting device comprises at least one pair of height adjusting components respectively arranged on two opposite side walls of the box body and a driving component arranged on the cover body and used for driving the height adjusting components; the driving assembly comprises a synchronous belt for driving the height-adjusting assembly and a shifting sheet for driving the synchronous belt to rotate; the cover body is also provided with a locking mechanism for locking the synchronous belt when the cover body is opened; the locking mechanism comprises a locking block with a notch and a clamping block with a bulge matched with the notch; the synchronous belt is positioned between the locking block and the clamping block.

As a further improvement of the invention, the cover body is also provided with a cam mandril linkage mechanism for controlling the connection state of the cover body and the box body; the cam mandril linkage mechanism comprises a knob switch, two guide rods of which the first ends are abutted against the periphery of the knob switch, and an auxiliary mechanism which keeps the first ends and the periphery of the knob switch in an abutting state all the time in the rotation process of the knob switch; the box body is provided with a positioning structure matched with a second end arranged opposite to the first end on the guide rod; the knob switch comprises an operating rod exposed on the upper surface of the cover body and a limiting cam connected with the operating rod; the limiting cam is provided with a first diameter and a second diameter which are intersected, and the length of the first diameter is greater than that of the second diameter; the clamping block is arranged between the operating rod and the limiting cam and can rotate along with the rotation of the knob switch; the protrusion is arranged on the clamping block and corresponds to the extending direction of the second diameter of the limiting cam.

As a further improvement of the invention, the limiting cam is provided with a limiting block protruding outwards at the periphery corresponding to the first diameter so as to limit the rotating angle of the limiting cam.

As a further improvement of the present invention, a second accommodating portion for accommodating the cam-lifter linkage mechanism is provided on the cover body, a first accommodating groove for accommodating the limit cam below the knob switch and a second accommodating groove for accommodating the guide rod are provided in the second accommodating portion, and a third accommodating groove for accommodating the auxiliary mechanism is provided on the second accommodating groove.

As a further improvement of the present invention, the width of the third accommodating groove is greater than the width of the second accommodating groove; the auxiliary mechanism comprises positioning pins fixed on each guide rod and springs connected with one sides, close to the second ends, of the positioning pins, the outer diameters of the positioning pins are larger than the width of the second containing grooves, one ends, far away from the positioning pins, of the springs are abutted to one ends, close to the second ends, of the third containing grooves, and the springs are used for enabling the first ends of the guide rods to be always abutted to the periphery of the limiting cam.

As a further improvement of the invention, the fixture block is integrally arranged with the knob switch.

As a further improvement of the invention, the positioning structure is a groove which is arranged on the box body and matched with the guide rod.

The invention has the beneficial effects that: on one hand, the storage device is provided with the flexible part and the adjusting device which can stretch out and draw back along the height direction of the box body on the side wall of the box body of the storage device, so that the height of the storage device can be conveniently adjusted; on the other hand, through set up on the lid and opening locking mechanism of hold-in range during the lid to opening behind the lid, the notch with the protruding cooperation of fixture block can block the hold-in range restriction hold-in range motion makes heightening subassembly and drive assembly keep the cooperation state when the lid is opened, is convenient for the assembly of lid and box body.

Drawings

Fig. 1 is a schematic perspective view of the storage device of the present invention.

Fig. 2 is a schematic structural view of a cover of the storage device of the present invention.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is a partially enlarged view of a portion B in fig. 2.

Fig. 5 is a partially enlarged view of a portion C in fig. 2.

Fig. 6 is a schematic structural view of a connection knob of the storage device of the present invention.

Fig. 7 is a schematic view of a partially exploded structure of a limit cam at a second diameter in the storage device of the present invention.

Fig. 8 is a partial enlarged view of portion D of fig. 7 according to the present invention.

Fig. 9 is a schematic structural view of a position limiting cam in the storage device of the present invention at a first diameter.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 9, the present invention provides a storage device 100 capable of adjusting a height according to an amount of stored articles, the storage device 100 includes a box 1 having a flexible portion 11 capable of extending and contracting in a height direction, a cover 2 forming an accommodating space for accommodating the stored articles in cooperation with the box 1, and an adjusting device 3 for adjusting the height of the flexible portion 11. When more articles are stored, the height of the flexible part 11 is increased through the adjusting device 3 so as to increase the height of the storage device 100 as a whole; when the stored articles are few, the height of the flexible part 11 is reduced through the adjusting device 3 so as to reduce the height of the storage device 100 as a whole; and optimizing the space utilization rate. In addition, the box body 1 is hermetically connected with the cover body 2 to prevent odor tainting.

The box body 1 comprises a bottom wall and side walls 12 extending upwards from the bottom wall, wherein the side walls 12 comprise a front wall 121, a rear wall 122 opposite to the front wall 121, and oppositely arranged left and

right side walls

123 and 124 connecting the front wall 121 and the rear wall 122. The flexible portion 11 is disposed on the side wall 12 at the same height of the front wall 121, the rear wall 122, the left side wall 123 and the right side wall 124, so as to facilitate the simultaneous adjustment of the height of the flexible portion 11.

Specifically, the flexible portion 11 is provided in an accordion shape. Of course, the flexible portion may also be formed by a bellows or by a plurality of sections of helical cross-section.

The adjusting device 3 includes at least a pair of height-adjusting components 31 respectively disposed on two opposite side walls 12 of the box body 1 for adjusting the height of the flexible portion 11, and a driving component 32 disposed on the cover body 2 for driving the height-adjusting components 31. In this embodiment, in order to adjust the height of the flexible portion 11 symmetrically, a set of height-adjusting components 31 are respectively disposed on the left sidewall 123 and the right sidewall 124, and the height of the flexible portion 11 is adjusted synchronously by adjusting the height-adjusting components 31 on the left sidewall 123 and the right sidewall 124. Of course, the height-adjusting components 31 may be respectively disposed on the front wall 121 and the rear wall 122 or a group of height-adjusting components 31 may be disposed on each of the four side walls 12.

The height-adjusting assembly 31 includes a nut 311 fixed below the flexible portion 11, a screw 312 matched with the nut 311, and a fixing block 313 fixed above the flexible portion 11 and sleeved on the screw 312, wherein the screw 312 is further provided with a limiting block 314 for limiting the relative movement of the screw 312 and the fixing block 313 along the up-down direction. Since the nut 311 is fixed, the screw 312 is engaged with the nut 311 when rotating, and the screw 312 moves in the up-down direction relative to the nut 311; meanwhile, the fixed block 313 is clamped by the limit block 314, so that the fixed block 313 moves up and down along with the screw 312 to drive the upper part of the flexible part 11 of the box body 1 to move up and down, and the purpose of adjusting the height of the box body 1 is achieved.

In this embodiment, the fixing block 313 is fixed on the sidewall 12, and a through hole for the screw 312 to pass through is formed on the fixing block 313, and the screw 312 can rotate in the through hole. The upper and lower parts of the fixing block 313 are respectively provided with a limiting block 314 fixed on the screw 312 to limit the screw 312 and the fixing block 313 to move up and down relatively along the height direction of the screw 312. In the process of assembling the height-adjusting assembly 31, one of the limit blocks 314 is fixed on the screw 312, the fixing block 313 is sleeved on the screw 312, the other limit block 314 is fixed on the screw 312, and the fixing block 313 is fixed on the sidewall 12.

In another embodiment, the screw 312 and the limiting block 314 are integrally disposed; at this time, one end of the fixing block 313 is fixed on the sidewall 12 of the box body 1, and the other end is provided with a through hole having an opening, and the opening is made of an elastic material. The distance between the two limit blocks 314 is equal to the thickness of the fixed block 313, so that when the screw 312 is clamped in the through hole, the screw 312 can freely rotate in the through hole and cannot move relative to the fixed block 313 in the up-down direction.

The driving assembly 32 comprises a connecting knob 321, a synchronous belt 322 and a shifting plate 323, wherein the connecting knob 321 is matched with the screw 312 when the cover body 2 is fixed on the box body 1, the synchronous belt 322 drives the connecting knob 321 to rotate, and the shifting plate 323 drives the synchronous belt 322 to rotate. When the cover 2 is covered on the box body 1, the connecting knob 321 is matched with the screw 312, and the purpose that the synchronous belt 322 drives the screw 312 to rotate can be realized only by stirring the poking sheet 323.

The connection knob 321 includes a saw tooth portion 3211 engaged with the timing belt 322 and a connection portion 3212 engaged with the screw 312. In the present embodiment, since the side wall 12 is provided with a pair of height-adjusting components 31, that is, two screws 312, two connecting knobs 321 are provided on the cover 2 to be respectively engaged with the two screws 312.

Specifically, a hollow portion 3213 is formed in the middle of the connecting portion 3212, the hollow portion 3213 is disposed in a regular hexagon, and a portion of the upper end of the screw 312, which is matched with the hollow portion 3213, is also disposed in a regular hexagon; so that when the connection knob 321 is rotated after the screw 312 is inserted into the connection portion 3212, the screw 312 is also rotated. A round hole 3214 communicated with the hollow portion 3213 is disposed in the middle of the saw-tooth portion 3211, and a flat head screw 3215 penetrates through the round hole 3214 to fix the connecting knob 321 to the cover 2. The diameter of the circular hole 3214 is smaller than that of the hollow portion 3213, so that when the grub screw 3215 is threaded through the circular hole 3214, the screw head 32151 of the grub screw 3215 is located in the hollow portion 3213, part of the structure of the screw rod 32152 is located in the circular hole 3214, and the connecting knob 321 can rotate around the screw rod 32152.

The synchronous belt 322 is arranged around the saw tooth parts 3211 of the two connecting knobs 321 to drive the two connecting knobs 321 to move synchronously, so that the screws 312 on the left side wall 123 and the right side wall 124 rotate along the nuts 311 to drive the upper parts of the flexible parts 11 of the box body 1 to move synchronously up and down, and the structure is simple and the movement process is relatively stable. Of course, in another embodiment, two timing belts 322 respectively engaged with the two connecting knobs 321 may be provided, so that when the height of the flexible portion 11 is adjusted, the two timing belts 322 need to be adjusted at the same time, so that the screws 312 on the left sidewall 123 and the right sidewall 124 drive the upper portion of the flexible portion 11 to move up and down synchronously.

The pick 323 includes a fixing portion 3231 for fixing the pick 323 to the timing belt 322, and a pick block 3232 connected to the fixing portion 3231. When the height of the flexible portion 11 needs to be adjusted, the synchronous belt 322 is driven to move only by toggling the toggle block 3232, and the operation is simple and convenient.

The cover body 2 is provided with a first accommodating part 21 for accommodating the synchronous belt 322, the first accommodating part 21 is a boss arranged on the cover body 2, and the boss is internally hollow. The upper side of the first receiving portion 21 is provided with a slide 211 for the shifting piece 323 to slide. The fixing portion 3231 is located in the first receiving portion 21, and the moving block 3232 is partially received in the slide 211 and partially exposed outside the cover 2 to facilitate a user to move the moving block 3232.

The cover body 2 is further provided with a cam mandril linkage mechanism 4 for controlling the connection state of the cover body 2 and the box body 1, and the cam mandril linkage mechanism 4 comprises a knob switch 41, two guide rods 42 with the first ends abutting against the periphery of the knob switch 41 and an auxiliary mechanism 43 for keeping the guide rods 42 and the periphery of the knob switch 41 in an abutting state all the time in the rotation process of the knob switch 41; the box body 1 is provided with a positioning structure 44 which is matched with a second end arranged opposite to the first end of the guide rod 42.

The rotary switch 41 includes an operating rod 411 exposed on the upper surface of the cover 2, and a limit cam 412 connected to the operating rod 411 and located on the lower surface of the cover 2. The first ends of the two guide rods 42 respectively abut against the periphery of the limit cam 412. The length of the first diameter and the second diameter of the limiting cam 412 extending along the two intersecting directions is different, and the length of the first diameter is greater than that of the second diameter. When the first ends of the two guide rods 42 are abutted to the peripheries corresponding to the first diameters, the limiting cam 412 is located at the first position, and the second ends of the guide rods 42 are matched with the positioning structure 44 to seal the cover body 2 and the box body 1; when the first ends of the two guide rods 42 are both abutted against the periphery corresponding to the second diameter, the limiting cam 412 is located at the second position, and the second end is separated from the positioning structure 44 at this time, so that the cover body 2 is separated from the box body 1.

The limiting cam 412 is provided with a limiting block 4121 protruding outwards at the periphery corresponding to the first diameter to limit the rotation angle of the limiting cam 412. When the knob switch 41 is rotated clockwise to switch the limit cam 412 from the second position to the first position, and the first ends of the two guide rods 42 reach the limit block 4121, the knob switch 41 cannot rotate clockwise any more. The limit cam 412 is in the first position. In this embodiment, the extending direction of the first diameter is perpendicular to the extending direction of the second diameter.

Specifically, when the cover 2 and the box 1 are in a sealed state, the limit cam 412 is located at a first position, first ends of the guide rods 42 are all abutted to the periphery corresponding to the first diameter and are located at the limit block 4121, and second ends of the guide rods 42 are accommodated in the positioning structure 44. When the article needs to be taken and placed, the knob switch 41 is rotated clockwise to rotate the limit cam 412, that is, the limit cam 412 is switched from the first position to the second position, and under the action of the auxiliary mechanism 43, the two guide rods 42 always abutting against the periphery of the limit cam 412 are both retracted towards one side of the limit cam 412, so that the second ends of the two guide rods 42 are both completely separated from the positioning structure 44, and the article can be taken and placed by opening the cover body. After the cover is taken and placed, the knob switch 41 is rotated counterclockwise to switch the limiting cam 412 from the second position to the first position, and the limiting cam 412 drives the two guide rods 42 to move towards the side away from the limiting cam 412, so that the second ends of the two guide rods 42 are accommodated in the positioning structure 44 to fix the cover 2 on the box body 1.

The assist mechanism 43 includes a positioning pin 431 fixed to each of the guide rods 42, a spring 432 connected to the positioning pin 431, and a positioning part 433 that limits a distance that the positioning pin 431 and the spring 432 move in a length direction of the guide rod 42.

A second accommodating part 22 for accommodating the cam-lifter linkage 4 is arranged on the cover 2, a first accommodating groove 221 for accommodating a limit cam 412 below the knob switch 41 and a second accommodating groove 222 for accommodating the guide rod 42 are arranged in the second accommodating part 22, and a third accommodating groove 223 for accommodating the auxiliary mechanism 43 is arranged on the second accommodating groove 222; the width of the third receiving groove 223 is greater than the width of the second receiving groove 222.

In the present embodiment, when the guide rod 42 is accommodated in the second accommodating groove 222 and the positioning pin 431 and the spring 432 are accommodated in the third accommodating groove 223, the width of the third accommodating groove 223 is larger than that of the second accommodating groove 222, so that the positioning pin 431 and the spring 432 are restricted in the third accommodating groove 223, and when the guide rod 42 moves, the positioning pin 431 and the spring 432 can move only in the third accommodating groove 223 in the direction of the guide rod 42. In the present embodiment, since the connection point between the second receiving groove 222 and the third receiving groove 223 corresponds to the positioning portion 433, it is not necessary to separately provide the positioning portion 433.

When the knob switch 41 is rotated to switch the limit cam 412 from the second position to the first position, both the guide rods 42 move to a side away from the knob switch 41. At this time, the positioning pin 431 and the spring 432 follow the guide rod 42 to move to the side far from the knob switch 41, and the positioning part 433 restricts the spring 432 to move to the side far from the knob switch 41, so that the spring 432 is gradually compressed, and the elastic force of the spring 432 indirectly acts on the guide rod 42 through the positioning pin 431, so that the first end of the guide rod 42 is always abutted against the periphery of the limit cam 412; when the knob switch 41 is rotated to switch the limit cam 412 from the first position to the second position, both the guide rods 42 are retracted toward one side of the knob switch 41, and at this time, the spring 432 is gradually restored, and the elastic force of the spring 432 indirectly acts on the guide rods 42 through the positioning pin 431, so that the first ends of the guide rods 42 are always abutted to the periphery of the limit cam 412.

The cover body 2 is further provided with a locking mechanism 5 for locking the synchronous belt 322 when the cover body 2 is opened. The locking mechanism 5 includes a locking block 51 having a notch and a latch 52 having a protrusion that fits the notch of the locking block 51. The timing belt 322 is located between the locking block 51 and the latch 52, so that the timing belt 322 can be locked to limit the movement of the timing belt 322 when the notch of the locking block 51 is engaged with the protrusion of the latch 52.

Specifically, the latch 52 is disposed between the operating lever 411 and the limit cam 412 and can rotate with the rotation of the knob switch 41. In the present embodiment, the latch 52 is integrally provided with the knob switch 41. The protrusion is arranged at a position corresponding to the extending direction of the second diameter of the limit cam 412; when the knob switch 41 rotates, the fixture block 52 can be driven to rotate together, and when the knob switch 41 drives the limit cam 412 to rotate to the second position, the synchronous belt 322 is clamped, so that the synchronous belt 322 cannot rotate, and meanwhile, the rotation angle of the knob switch 41 is also limited. At this time, the cover 2 can be opened to take in and out an article, and the timing belt 322 cannot move, so that the coupling knob 321 and the screw 312 are maintained in a coupled state when the cover 2 is opened.

Specifically, the positioning structure 44 is a groove which is arranged on the inner side of the side wall 12 of the box body 1 and is matched with the guide rod 42.

As described above, in the storage device 100 of the present invention, the side wall 12 of the box body 1 is provided with the flexible portion 11 that can be extended and contracted in the height direction of the box body 1, and the adjusting device 3 for adjusting the height of the flexible portion 11 is further provided. When more articles are stored, the flexible part 11 of the side wall 12 of the box body 1 is heightened through the adjusting device 3 so as to integrally increase the storage space; when the storage articles are less, the flexible part 11 of the side wall 12 of the box body 1 is lowered through the adjusting device 3 so as to reduce the storage space as a whole; and optimizing the space utilization rate.

The adjusting device 3 includes at least a pair of height-adjusting components 31 respectively disposed on two opposite side walls 12 of the box body 1, and a driving component 32 disposed on the cover body 2 for driving the height-adjusting components 31. Wherein heightening subassembly 31 is screw rod 312, nut 311 cooperation structure, drive assembly 32 is cooperation structures such as hold-in range 322, utilizes hold-in range 322 drive screw rod 312 rotatory along nut 311 to the synchronous up-and-down motion in upper portion of the flexible portion 11 of drive box body 1 adjusts the height of flexible portion 11, reaches the purpose that changes storing space, simple structure and convenient operation.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims

1. A storage device comprises a cover body and a box body, wherein the box body comprises a bottom wall and a side wall extending upwards from the bottom wall, a flexible portion capable of stretching along the height direction of the box body is arranged on the side wall, the storage device further comprises an adjusting device for adjusting the height of the flexible portion, and the side wall comprises a front wall and a rear wall which are oppositely arranged and a left side wall and a right side wall which are oppositely arranged; the method is characterized in that: the adjusting device comprises at least one pair of height adjusting components respectively arranged on two opposite side walls of the box body and a driving component arranged on the cover body and used for synchronously driving the at least one pair of height adjusting components; the height adjusting assembly comprises a nut fixed below the flexible part, a screw matched with the nut and a fixing block fixed above the flexible part and sleeved on the screw; the screw rod is provided with a limiting block for limiting the relative movement of the screw rod and the fixing block along the vertical direction; the driving assembly comprises a connecting knob for driving the screw rod to rotate, a synchronous belt for driving the connecting knob to rotate and a shifting sheet for driving the synchronous belt to rotate; the shifting piece comprises a fixed part for fixing the shifting piece on the synchronous belt and a shifting block connected with the fixed part; the cover body is provided with a first accommodating part for accommodating the synchronous belt, and the first accommodating part is provided with a slide way for the shifting piece to slide; part of the structure of the toggle block is exposed out of the cover body so as to facilitate a user to toggle the toggle block; the cover body is also provided with a locking mechanism for locking the synchronous belt when the cover body is opened; the locking mechanism comprises a locking block with a notch and a clamping block with a bulge matched with the notch; the synchronous belt is positioned between the locking block and the clamping block.

2. A storage device as defined in claim 1, further comprising: the cover body is also provided with a cam mandril linkage mechanism used for controlling the connection state of the cover body and the box body; the cam mandril linkage mechanism comprises a knob switch, two guide rods of which the first ends are abutted against the periphery of the knob switch, and an auxiliary mechanism which keeps the first ends and the periphery of the knob switch in an abutting state all the time in the rotation process of the knob switch; the box body is provided with a positioning structure matched with a second end arranged opposite to the first end on the guide rod; the knob switch comprises an operating rod exposed on the upper surface of the cover body and a limiting cam connected with the operating rod; the limiting cam is provided with a first diameter and a second diameter which are intersected, and the length of the first diameter is greater than that of the second diameter; the clamping block is arranged between the operating rod and the limiting cam and can rotate along with the rotation of the knob switch; the protrusion is arranged on the clamping block and corresponds to the extending direction of the second diameter of the limiting cam.

3. A storage device as defined in claim 2, further comprising: the limiting cam is provided with a limiting block in a protruding mode at the periphery corresponding to the first diameter so as to limit the rotating angle of the limiting cam.

4. A storage device as defined in claim 2, further comprising: the cover body is provided with a second accommodating part for accommodating the cam mandril linkage mechanism, a first accommodating groove for accommodating the limiting cam below the knob switch and a second accommodating groove for accommodating the guide rod are arranged in the second accommodating part, and the second accommodating groove is provided with a third accommodating groove for accommodating the auxiliary mechanism.

5. A store as claimed in claim 4, characterized in that: the width of the third accommodating groove is larger than that of the second accommodating groove; the auxiliary mechanism comprises positioning pins fixed on each guide rod and springs connected with one sides, close to the second ends, of the positioning pins, the outer diameters of the positioning pins are larger than the width of the second containing grooves, one ends, far away from the positioning pins, of the springs are abutted to one ends, close to the second ends, of the third containing grooves, and the springs are used for enabling the first ends of the guide rods to be always abutted to the periphery of the limiting cam.

6. A storage device as defined in claim 2, further comprising: the fixture block and the knob switch are integrally arranged.

7. A storage device as defined in claim 2, further comprising: the positioning structure is a groove which is arranged on the box body and matched with the guide rod.