CN219318811U - Tray mechanism and mobile refrigerator - Google Patents

Abstract

The utility model discloses a tray mechanism and a mobile refrigerator, wherein the tray mechanism comprises a support column, a top cover, a first tray and a rotating assembly, the top cover is connected to one end of the support column in the vertical direction, the first tray is connected to the other end of the support column in the vertical direction, the rotating assembly is positioned at the bottom of the first tray, the rotating assembly is provided with a base connected with a lifting mechanism, when a user needs to take and put articles on the tray mechanism, the lifting mechanism can drive the tray mechanism to lift up by pushing the base, and the user can drive the first tray to rotate to a proper angle by rotating the top cover, so that the articles on the first tray can be closer to the user, the user can take the articles on different positions on the first tray without moving, the convenience of use is improved, or the vacant position on the first tray can face the user by pushing the first tray to rotate, so that the user can conveniently place the articles on the vacant position of the first tray, and the convenience of taking and putting the articles by the user is greatly improved.

Description

Tray mechanism and mobile refrigerator

Technical Field

The utility model relates to the technical field of household appliances, in particular to a tray mechanism and a mobile refrigerator.

Background

In the related art, a refrigerator is generally fixed at a specific location for use. Currently, with the high-speed development of the internet of things technology, some manufacturers develop a movable refrigerator, a tray for storing articles is arranged in the movable refrigerator, the tray cannot rotate relative to a refrigerator body of the movable refrigerator, and when a user needs to take and place a plurality of articles located at different positions on the tray, the user needs to move to the corresponding positions of the movable refrigerator respectively to take out the plurality of articles in sequence, so that inconvenience in use is caused.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a tray mechanism convenient for taking and placing articles.

The utility model also provides a mobile refrigerator with the tray mechanism.

The tray mechanism according to the embodiment of the first aspect of the present utility model includes:

a support column;

the top cover is fixedly connected to one end of the support column along the vertical direction;

the first tray is connected to the other end of the support column along the vertical direction;

the rotating assembly is positioned at the bottom of the first tray and is provided with a base connected with the lifting mechanism;

the first support is rotatably connected with the base around the central shaft of the support column.

The tray mechanism according to the embodiment of the first aspect of the utility model has at least the following beneficial effects:

when the user needs to get the article of putting on the tray mechanism, the elevating system who removes the refrigerator can drive the tray mechanism through promoting the base and rise, then the user can rotate to suitable angle through rotating the top cap, thereby drive first tray around the center pin of support column, make the article on the first tray can be closer to the user, thereby make the user need not to remove and can take the article of different positions on the first tray, improve the convenience of use, perhaps rotate through promoting first tray, make the vacancy on the first tray can be towards the user, thereby convenience of customers places the article on the vacancy of first tray, improve the convenience of user's getting the article of putting greatly.

According to some embodiments of the utility model, the tray mechanism further comprises a second tray connected to the support column and located between the first tray and the top cover.

According to some embodiments of the utility model, the rotating assembly is further provided with a rolling member, the base is provided with a first track groove, the first tray is provided with a second track groove corresponding to the first track groove, and the rolling member is connected to the first track groove and the second track groove in a rolling manner so that the first tray is connected to the base in a rotating manner.

According to some embodiments of the utility model, the number of the rolling elements is plural, the rotating assembly is further provided with a first bracket between the first tray and the base, the first bracket is provided with a plurality of limiting holes, and the rolling elements are rotatably installed in the corresponding limiting holes.

According to some embodiments of the utility model, the rotating assembly is further provided with a second bracket connected to the base, and an upper end of the second bracket abuts against a bottom end of the first tray.

According to some embodiments of the utility model, the first tray is provided with an angle limiting block, the second bracket is provided with an angle limiting groove, and the angle limiting block is slidably mounted in the angle limiting groove.

According to some embodiments of the utility model, the first and second brackets are each annular in shape, and the second bracket is located inside the first bracket.

According to some embodiments of the utility model, the base includes a body portion and a wear portion, the wear portion being connected to an upper end of the body portion, the first rail groove being provided in the wear portion.

According to some embodiments of the utility model, the first track groove and the second track groove are both provided with two, the first track groove and the second track groove are both concentric annular, and the rolling element is provided with two groups.

According to some embodiments of the utility model, the rotating assembly is further provided with a bearing, a movable frame and a fixed frame, the first tray is connected to an outer ring of the bearing through the movable frame, and the base is connected to an inner ring of the bearing through the fixed frame.

According to some embodiments of the utility model, the tray mechanism further comprises a buffer member connected to the bottom of the base.

A mobile refrigerator according to an embodiment of the second aspect of the present utility model includes the tray mechanism of the embodiment of the first aspect of the present utility model.

The mobile refrigerator according to the embodiment of the second aspect of the utility model has at least the following beneficial effects:

remove the refrigerator through being provided with foretell tray mechanism, when the user need get and put the article on the tray mechanism, the elevating system who removes the refrigerator can drive tray mechanism through promoting the base and rise, then the user can pass through the rotation top cap, thereby drive first tray and rotate to suitable angle around the center pin of support column, make the article on the first tray can be closer to the user, thereby make the user need not to remove and can take the article of different positions on the first tray, improve the convenience of use, perhaps rotate through promoting first tray, make the vacancy on the first tray can be towards the user, thereby convenience of customers places the article on the vacancy of first tray, improve the convenience of user getting and putting the article greatly.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Additional aspects and advantages of the present utility model will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic diagram illustrating an assembly structure of a tray mechanism and a lifting mechanism according to some embodiments of the present utility model;

FIG. 2 is a cross-sectional view of the tray mechanism of FIG. 1;

FIG. 3 is a schematic perspective view of the rotary assembly of FIG. 2;

FIG. 4 is a cross-sectional view of the rotating assembly of FIG. 3;

fig. 5 is a bottom structural view of the first tray of fig. 2;

FIG. 6 is a cross-sectional view of a tray mechanism according to further embodiments of the utility model;

fig. 7 is an enlarged view at a in fig. 6;

FIG. 8 is a schematic view of an assembled structure of the first bracket and the second bracket in FIG. 6;

fig. 9 is a bottom structural view of the first tray of fig. 6;

FIG. 10 is a cross-sectional view of a tray mechanism according to still further embodiments of the utility model;

FIG. 11 is an enlarged view at B in FIG. 10;

FIG. 12 is a perspective view of a support column according to some embodiments of the present utility model;

FIG. 13 is a top block diagram of a first tray according to some embodiments of the utility model;

fig. 14 is a perspective view of a mobile refrigerator (tray mechanism not lifted) according to some embodiments of the present utility model;

fig. 15 is a further perspective view (tray mechanism is raised) of a mobile refrigerator according to some embodiments of the present utility model.

The reference numerals are as follows:

a top cover 100;

support column 200; ribs 210; a clasp 220;

a first tray 300; a second track groove 310; an angle stopper 320; a slot 330; the concave location 331;

a rotating assembly 400; a base 410; a body 411; wear-resistant portion 412; a first rail groove 413; a rolling member 420; a first bracket 430; a limiting hole 431; a second bracket 440; an angle limiting groove 441; a buffer 450; a movable frame 460; a fixing frame 470; a bearing 480; an outer ring 481; an inner ring 482;

a second tray 500; a lifting mechanism 600; a case 700; running gear 800.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In the related art, a refrigerator is generally fixed at a specific location for use. Currently, with the high-speed development of the internet of things technology, some manufacturers develop a movable refrigerator, a tray for storing articles is arranged in the movable refrigerator, the tray cannot rotate relative to a refrigerator body of the movable refrigerator, and when a user needs to take and place a plurality of articles located at different positions on the tray, the user needs to move to the corresponding positions of the movable refrigerator respectively to take out the plurality of articles in sequence, so that inconvenience in use is caused.

Therefore, the utility model provides a tray mechanism which can facilitate a user to take and put articles.

Referring to fig. 1 to 5, a tray mechanism for a mobile refrigerator according to an embodiment of the present utility model is provided with a case 700, the upper end of the case 700 has an opening, and the tray mechanism is disposed in the case 700 and can be lifted up by a lifting mechanism 600 to be exposed to the outside of the opening so that a user can take and put articles on the tray mechanism. Specifically, the tray mechanism includes a support column 200, a top cover 100, a first tray 300, and a rotation assembly 400. The support column 200 is substantially cylindrical, but may be square, or the like. The support column 200 is vertically arranged, and can be integrally manufactured by injection molding, or two rod pieces can be manufactured respectively, and then the two rod pieces are assembled to form the support column 200. The top cover 100 is connected to the top end of the support column 200, and the first tray 300 is connected to the bottom end of the support column 200. The top cover 100 can cover the opening of the case 700 to prevent foreign matters such as external dust from entering the case 700 to contaminate the objects on the tray mechanism, and the first tray 300 is used for containing beverages, vegetables or other objects to be refrigerated. Specifically, the top cover 100 may be connected to the support column 200 by a clamping connection or a bolt connection, and the first tray 300 may also be connected to the support column 200 by a clamping connection or a bolt connection, and the top cover 100 may rotate by driving the first tray 300 by the support column 200. The rotating assembly 400 is located at the bottom of the first tray 300, the rotating assembly 400 is provided with a base 410 connected to the lifting mechanism 600, the lifting mechanism 600 can be a lifting mechanism 600 with a pulley and a rope matched, or can be a lifting mechanism 600 with a screw and a sleeve matched, or can be a lifting mechanism 600 with other forms, and the lifting mechanism 600 can drive the base 410 to ascend or descend, so that the lifting and descending of the tray mechanism are realized. The first tray 300 is rotatably connected to the base 410, and the first tray 300 can rotate around the central axis of the support column 200 when rotating relative to the base 410, thereby rotating to a desired position.

Referring to fig. 2 and 15, when a user needs to take and place the articles on the tray mechanism, the lifting mechanism 600 can drive the tray mechanism to ascend by pushing the base 410, and then the user can drive the first tray 300 to rotate to a proper angle around the central axis of the support column 200 by rotating the top cover 100, so that the articles on the first tray 300 can be closer to the user, and the user can take the articles at different positions on the first tray 300 by rotating the first tray 300 to a corresponding angle, so that the convenience of use is improved, or by pushing the first tray 300 to rotate, the empty space on the first tray 300 can face the user, thereby facilitating the user to place the articles on the empty space of the first tray 300, and greatly improving the convenience of taking and placing the articles by the user.

Referring to fig. 3 to 5, it can be appreciated that in order to enable the first tray 300 to smoothly rotate with respect to the base 410, in some embodiments of the present utility model, the rotating assembly 400 is provided with a rolling member 420, the rolling member 420 may be in a ball or the like structure, the base 410 is provided with a first rail groove 413, the first rail groove 413 may be an annular groove or a non-closed circular arc groove, the first tray 300 is provided with a second rail groove 310 corresponding to the first rail groove 413, and the first tray 300 is rotatably connected to the base 410 by being connected to the first rail groove 413 and the second rail groove 310 through the rolling member 420 in a rolling manner. When the user rotates the top cover 100, the top cover 100 drives the first tray 300 to push the rolling element 420 through the support column 200, so that the rolling element 420 rolls between the first track groove 413 and the second track groove 310, and the first tray 300 can rotate relative to the base 410, and the rolling friction force of the rolling element 420 is smaller, so that the first tray 300 can smoothly rotate relative to the base 410.

Referring to fig. 4, it can be understood that since the inner wall of the first rail groove 413 is worn out to some extent when the rolling member 420 rolls in the first rail groove 413, the base 410 may include a body portion 411 and a wear-resistant portion 412, the wear-resistant portion 412 is connected to the upper end of the body portion 411, and the first rail groove 413 is disposed at the wear-resistant portion 412. The wear-resistant portion 412 may be made of a material having superior wear-resistant performance, so that the wear of the base 410 may be reduced, and when the wear-resistant portion 412 is worn too much, the wear-resistant portion 412 may be detached and then replaced, so that the entire base 410 does not have to be replaced, which is advantageous in reducing maintenance costs of the tray mechanism. Of course, the tray mechanism may be further provided with a buffer 450, the buffer 450 is connected to the bottom of the base 410, the buffer 450 may be a structure such as an elastic rubber ring, and the buffer 450 may reduce the impact force transmitted from the rotating assembly 400 to the supporting member for supporting the rotating assembly 400, and reduce the influence of vibration of the rotating assembly 400 due to rotation of the related member on the supporting member.

Referring to fig. 3, it can be understood that, in order to make the rotation of the first tray 300 smoother, the number of the rolling members 420 is generally set to be plural, so that the first tray 300 can be supported by the plurality of rolling members 420 when rotated, however, at this time, the distance between the rolling members 420 may be changed, which easily causes the plurality of rolling members 420 to be gathered together, reducing the smooth effect of the rotation of the first tray 300. To this end, in some embodiments of the present utility model, the rotation assembly 400 is further provided with a first bracket 430 between the first tray 300 and the base 410, the first bracket 430 is provided with a plurality of limiting holes 431, and the rolling member 420 is rotatably mounted to the corresponding limiting hole 431. By providing the first bracket 430, the rolling members 420 are installed in the corresponding limiting holes 431, so that the distance between the adjacent rolling members 420 can be maintained unchanged, and thus the rotational stability of the first tray 300 can be improved.

Referring to fig. 3 and 4, it can be appreciated that in order to prevent the first tray 300 from undesirably rotating under the condition of external vibration force, etc., in some embodiments of the present utility model, the rotating assembly 400 is further provided with a second bracket 440 connected to the base 410, an upper end of the second bracket 440 is abutted to a bottom end of the first tray 300, and the first tray 300 can apply gravity to the second bracket 440, such that frictional resistance between the second bracket 440 and the first tray 300 is increased, thereby requiring a larger pushing force when the first tray 300 is pushed to rotate, such that the first tray 300 has a certain self-locking capability, and the first tray 300 is prevented from undesirably rotating under slight vibration. Specifically, the second support 440 may have a circular disk shape, and the disk-shaped second support 440 may increase a contact area with the bottom of the first tray 300, thereby increasing frictional resistance between the first tray 300 and the second support 440.

Referring to fig. 3 and 5, it can be appreciated that in order to limit the angular range in which the first tray 300 can rotate, to prevent the first tray 300 from rotating too much to adversely affect other components, in some embodiments of the present utility model, the first tray 300 is provided with an angle stopper 320, and the second bracket 440 is provided with an angle stopper groove 441, and the angle stopper 320 is slidably mounted in the angle stopper groove 441. When the first tray 300 rotates, the angle limiting block 320 is driven to rotate in the angle limiting groove 441, and when the angle limiting block 320 rotates to the end part of the angle limiting groove 441, the angle limiting block 320 cannot continue to rotate, so that the first tray 300 cannot continue to rotate, and the limitation of the rotation angle of the first tray 300 is achieved. Specifically, the angle limiting groove 441 is an arc groove, and the included angle between the two ends of the arc groove and the central axis of the support column 200 may be 15 °, or may be 30 °, or may be 60 °, or may be 90 °, and may be specifically set according to actual needs, so that the rotatable angle of the first tray 300 may be set in a suitable range.

Referring to fig. 3 and 4, it can be appreciated that in order to make the structure of the rotating assembly 400 more compact, in some embodiments of the present utility model, the first bracket 430 and the second bracket 440 are both in a ring shape, wherein the second bracket 440 is located inside the first bracket 430, so that the first bracket 430 and the second bracket 440 can be disposed substantially in the same plane space, thereby facilitating the reduction of the height size of the rotating assembly 400, making the structure of the rotating assembly 400 more compact, and facilitating the reduction of the space occupied by the tray mechanism, thereby facilitating the realization of the miniaturization of the mobile refrigerator.

It will be appreciated that in the above embodiment, referring to fig. 2 and 3, the radial dimension of the base 410 may be set to be relatively small, and only one first track groove 413 may be provided, but the supporting points of the rolling member 420 on the first tray 300 are concentrated in a relatively small area, which is detrimental to the stability of the rotation of the first tray 300. To further improve the rotational stability of the first tray 300, in some embodiments of the present utility model, referring to fig. 6 to 9, the radial dimension of the base 410 may be set to be greater, so that two or more first track grooves 413 may be provided on the base 410, the first track grooves 413 may be concentric, the first tray 300 may be correspondingly provided with a plurality of second track grooves 310, the second track grooves 310 may be concentric, and one first track groove 413 may correspond to one second track groove 310. Of course, the rolling elements 420 are also correspondingly provided with a plurality of groups, each group includes a plurality of rolling elements 420, and each group of rolling elements 420 is arranged between the corresponding first track groove 413 and the corresponding second track groove 310, so that when the first tray 300 rotates relative to the base 410, the first tray 300 can drive the plurality of groups of rolling elements 420 to rotate in the corresponding track grooves, and further, the first tray 300 can obtain more rotation supporting points, and the rotation supporting points can be distributed in a larger area, so that the supporting stress of the first tray 300 is more uniform, and the rotation stability of the first tray 300 is further improved. Specifically, at this time, the first bracket 430 is also provided with a plurality of concentric annular limiting holes 431, and each set of rolling elements 420 is movably mounted in the corresponding set of limiting holes 431.

In the above embodiment, the rotation assembly 400 is configured to rotate the first tray 300 with respect to the base 410 by the structure provided with the rolling members 420 and the track grooves, and it is understood that the rotation assembly 400 may also be other structures, for example, in some embodiments of the present utility model, referring to fig. 10 and 11, the rotation assembly 400 is provided with the base 410, the bearing 480, the movable frame 460, and the fixed frame 470. The bearing 480 is a deep groove ball bearing having balls, an inner ring 482 and an outer ring 481, the balls having a plurality and being disposed between the inner ring 482 and the outer ring 481. The first tray 300 is coupled to an outer ring 481 of the bearing 480 through the movable frame 460, and the base 410 is coupled to an inner ring 482 of the bearing 480 through the fixed frame 470, so that the first tray 300 can be rotatably coupled to the base 410 through the bearing 480. Specifically, the movable frame 450 is in a ring shape, the bottom of the first tray 300 is connected to the upper end of the movable frame 460 by means of bonding or bolting, and the inner side of the movable frame 460 is sleeved and fixed on the outer wall of the outer ring 481 of the bearing 480, so that the first tray 300 can drive the outer ring 481 of the bearing 480 to rotate. The fixing frame 470 is also in a ring shape, the outer side of the fixing frame 470 is embedded and fixed on the inner ring 482 of the bearing 480, a bulge is arranged in the middle of the base 410, and the inner side of the fixing frame 470 is sleeved on the bulge of the base 410, so that the inner ring 482 of the bearing 480 can be fixed on the base 410. When the first tray 300 rotates, the first tray 300 drives the outer ring 481 of the bearing 480 to rotate around the inner ring 482, so that the rotation is smooth and the installation is convenient. Of course, the movable frame 460 may be fixed to the inner ring 482, the fixed frame 470 may be fixed to the outer ring 481, and the outer ring 482 may be fixed to the base 410, and the first tray 300 may be rotatable relative to the base 410 via the bearing 480.

Referring to fig. 2, 12 and 13, it can be appreciated that, in order to enable the first tray 300 to be quickly mounted with the support column 200, in some embodiments of the present utility model, the first tray 300 is provided with a slot 330, and the support column 200 is inserted into the slot 330, so that the mounting is quick and convenient. Referring to fig. 13, specifically, an annular plate is disposed in the middle of the upper end of the first tray 300, and a slot 330 is formed around the annular plate, and when the first tray is installed, the lower end of the support column 200 is inserted into the slot 330, so that the first tray 300 and the support column 200 can be installed and connected, and the operation is fast and convenient.

Referring to fig. 12 and 13, it can be appreciated that, in order to prevent the first tray 300 from rotating relative to the support column 200, in some embodiments of the present utility model, the outer wall of the support column 200 is provided with a rib 210, the inner wall of the slot 330 is provided with a recess 331 matching with the rib 210, and when the support column 200 is inserted into the slot 330, the rib 210 is clamped in the recess 331. If the first tray 300 has a tendency to rotate relative to the support column 200, the inner wall of the concave portion 331 can block the rib 210, so that the first tray 300 can be prevented from rotating relative to the support column 200. Of course, by matching the concave portion 331 and the convex rib 210, rapid positioning of the support column 200 and the first tray 300 during installation can be achieved, and installation convenience is improved.

It should be noted that, in some embodiments of the present utility model, the tray mechanism is only provided with one tray, and the distance between the first tray 300 and the top cover 100 is relatively large, so that the space utilization of the tray mechanism is low when the height of the articles contained on the first tray 300 is low. To this end, referring to fig. 2, 6 and 10, in order to increase the space utilization of the tray mechanism, thereby enabling the tray mechanism to load more articles, in further embodiments of the present utility model, the tray mechanism further includes a second tray 500, the second tray 500 being connected to the support column 200 and located between the first tray 300 and the top cover 100, so that a portion of articles requiring refrigeration can be placed on the second tray 500. Of course, the second tray 500 may be provided in plurality, so that the space utilization of the tray mechanism may be further improved. The second tray 500 may be a circular tray or a fan-shaped tray, and the circular tray may contain more objects, and the fan-shaped tray may avoid completely shielding the first tray 300 below, so that objects having a larger height size may be placed on the first tray 300. Referring to fig. 12, specifically, the support column 200 is further provided with a plurality of buckles 220 arranged along a vertical interval, and the second tray 500 can be detachably connected to any buckle 220 in a clamping manner, so that a user can adjust the installation position of the second tray 500 according to needs, adjust the height dimension between the first tray 300 and the second tray 500, thereby being capable of adapting to the loading requirements of articles with different heights and improving the convenience of use of the tray mechanism.

Referring to fig. 14 and 15, the mobile refrigerator according to the second aspect of the present utility model includes a case 700, a traveling mechanism 800, a lifting mechanism 600, and a tray mechanism according to the first aspect of the present utility model. The tray mechanism is disposed in the case 700, referring to fig. 15, the lifting mechanism 600 may drive the tray mechanism to move vertically to extend out of the case 700, thereby facilitating a user to take out the articles on the tray mechanism or place the articles on the tray mechanism, the traveling mechanism 800 is disposed at the bottom of the case 700, and the traveling mechanism 800 may drive the case 700 to move, thereby enabling the mobile refrigerator to move to a desired position, so as to facilitate the use of the user.

When a user needs to take and place articles on the tray mechanism, the lifting mechanism 600 can drive the tray mechanism to ascend by pushing the base 410, and then the user can drive the first tray 300 to rotate to a proper angle around the central axis of the support column 200 by rotating the top cover 100, so that the articles on the first tray 300 can be closer to the user, the user can take the articles at different positions on the first tray 300 by rotating the first tray 300 to a corresponding angle, the convenience of use is improved, or the user can conveniently place the articles on the first tray 300 by pushing the first tray 300 to rotate, and the convenience of taking and placing the articles by the user is greatly improved.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (12)

1. The tray mechanism, its characterized in that includes:

a support column;

the top cover is fixedly connected to one end of the support column along the vertical direction;

the first tray is connected to the other end of the support column along the vertical direction;

the rotating assembly is positioned at the bottom of the first tray and is provided with a base;

the first support is rotatably connected with the base around the central shaft of the support column.

2. The tray mechanism of claim 1, further comprising a second tray connected to the support column and located between the first tray and the top cover.

3. The tray mechanism of claim 1, wherein the rotating assembly is further provided with a rolling member, the base is provided with a first rail groove, the first tray is provided with a second rail groove corresponding to the first rail groove, and the rolling member is rollably connected to the first rail groove and the second rail groove to rotatably connect the first tray to the base.

4. A tray mechanism according to claim 3, wherein the number of rolling elements is plural, the rotating assembly is further provided with a first bracket between the first tray and the base, the first bracket is provided with a plurality of limiting holes, and the rolling elements are rotatably mounted in the limiting holes.

5. The tray mechanism of claim 4, wherein the rotating assembly is further provided with a second bracket connected to the base, an upper end of the second bracket abutting a bottom end of the first tray.

6. The tray mechanism of claim 5, wherein the first tray is provided with an angle stop, the second bracket is provided with an angle stop slot, and the angle stop is slidably mounted in the angle stop slot.

7. The tray mechanism of claim 5, wherein the first and second brackets are each annular in shape, the second bracket being located inboard of the first bracket.

8. A tray mechanism according to claim 3, wherein the base comprises a body portion and a wear portion, the wear portion being connected to an upper end of the body portion, the first track groove being provided in the wear portion.

9. A tray mechanism according to claim 3, wherein the first track grooves and the second track grooves are each provided in two, the two first track grooves and the two second track grooves are each in a concentric ring shape, and the rolling members are provided in two groups.

10. The tray mechanism of claim 1, wherein the rotating assembly is further provided with a bearing, a movable frame, and a fixed frame, the first tray is connected to an outer ring of the bearing through the movable frame, and the base is connected to an inner ring of the bearing through the fixed frame.

11. The tray mechanism of any one of claims 1 to 10, further comprising a bumper attached to a bottom of the base.

12. A mobile refrigerator comprising the tray mechanism of any one of claims 1 to 11.

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