CN220397955U - Bottom shelf fixing structure - Google Patents

Abstract

The utility model discloses a bottom shelf fixing structure which comprises a connecting piece and a rotating piece, wherein a supporting seat, a clamping position, a connecting column and a positioning column are arranged on the connecting piece; the rotating piece comprises a rotating part and a clamping part, the rotating part is rotationally connected with the connecting piece, and the clamping part is clamped into the clamping position or separated from the clamping position; compared with the prior art, the bottom shelf fixing structure is characterized in that when the bottom shelf is fixed, the bottom shelf fixing structure is symmetrically arranged on the side wall surfaces of two sides of the refrigerator, the supporting seats on the side wall surfaces of two sides of the refrigerator respectively support the grid lines of the edges of the two sides of the bottom shelf, the bottom shelf cannot move after being installed in the refrigerator, and when the bottom shelf is required to be taken out from the refrigerator, the rotating piece is rotated, the clamping part is separated from the clamping position, and the bottom shelf can be taken out from the refrigerator, so that the operation is convenient.

Description

Bottom shelf fixing structure

Technical Field

The utility model relates to the technical field of refrigerators, in particular to a bottom shelf fixing structure.

Background

General refrigerator-freezer (freezer, refrigerator etc.) is through setting up the layer frame and is placed article, and the side of present freezer, layer frame is equipped with a plurality of connecting pieces, when setting up the layer frame in the freezer, is connected the side wall face of connecting piece and freezer through the screw to make layer frame fixed in the freezer. After the shelf is fixed in the refrigerator, if the shelf is required to be cleaned, a user needs to detach the fixed connecting piece and the screws on the side wall surface of the refrigerator, and then the shelf can be taken out from the refrigerator, so that the shelf is difficult to clean due to complex process.

Disclosure of Invention

The utility model aims to provide a bottom shelf fixing structure which is used for solving the technical problems.

A bottom shelf securement structure, comprising:

the connecting piece is provided with a supporting seat, a clamping position, a connecting column and a positioning column, wherein the supporting seat and the clamping position are positioned at the outer side of the connecting piece, the connecting column and the positioning column are positioned at the inner side of the connecting piece, and the connecting column is provided with a screw hole;

the rotating piece comprises a rotating part and a clamping part, the rotating part is rotationally connected with the connecting piece, the rotating piece is rotated, and the clamping part is clamped into the clamping position or separated from the clamping position.

According to one embodiment of the utility model, the upper end of the connecting piece is provided with the rotating groove, the rotating part is rotationally connected in the rotating groove, the supporting seat is formed by outwards extending the lower end of the connecting piece, one side of the supporting seat away from the connecting piece is provided with the limiting groove, the limiting groove forms the clamping position, the rotating part rotates left and right, and the clamping part is clamped in the clamping position or separated from the clamping position.

According to one embodiment of the utility model, the rotating part comprises a rotating seat and a rotating connecting part, the rotating seat is circular, the rotating connecting part is a circular ring with the outer diameter smaller than that of the rotating seat, a limiting block is arranged on the outer wall surface of the rotating connecting part, a connecting hole is arranged at the bottom of the rotating groove, a connecting annular wall extends towards the inner side of the connecting piece, an avoidance groove matched with the limiting block is arranged on the connecting annular wall, the rotating seat is rotationally connected in the rotating groove, the rotating connecting part is rotationally connected in the connecting annular wall, and the limiting block is slidingly connected to the outer edge of the connecting annular wall.

According to one embodiment of the utility model, a plurality of protruding parts are uniformly distributed on one side of the swivel base facing the connecting piece.

According to one embodiment of the utility model, the bottom of the rotating groove is provided with a plurality of grooves matched with the protruding parts, the rotating part is rotated left and right, and the protruding parts enter the other groove from one groove.

According to one embodiment of the utility model, the rotary connecting part is provided with a deformation groove, and the deformation groove is arranged along the length direction of the rotary connecting part.

According to one embodiment of the utility model, the supporting seat is formed by extending the lower end of the connecting piece outwards, an extending part extends upwards from one side of the supporting seat far away from the connecting piece, two sides of the upper end of the extending part are provided with rotating seats, one end of each rotating part, which is connected with the corresponding clamping part, is rotationally connected with the corresponding rotating seat, the connecting piece is provided with a buckle, the buckle forms a clamping position, the rotating parts rotate up and down, and the clamping parts are clamped into the clamping position or separated from the clamping position.

According to one embodiment of the utility model, the connecting piece is provided with a yielding groove, and the buckle is arranged in the yielding groove.

According to an embodiment of the utility model, the rotating portion is formed by extending an end of the clamping portion away from the connecting piece obliquely upwards.

According to one embodiment of the utility model, the two sides of the connecting piece are provided with the supporting walls, the supporting walls are L-shaped and comprise a vertical section perpendicular to the body of the connecting piece and a horizontal section parallel to the body of the connecting piece, and the length of the vertical section is matched with the length of the connecting column and is smaller than the length of the positioning column.

Compared with the prior art, the bottom shelf fixing structure has the following advantages:

according to the bottom shelf fixing structure, when the bottom shelf is fixed, the bottom shelf fixing structure is symmetrically arranged on the side wall surfaces of two sides of the refrigerator, the supporting seats on the side wall surfaces of two sides of the refrigerator respectively support the grid lines of the edges of the two sides of the bottom shelf, the bottom shelf cannot move after being installed in the refrigerator, and when the bottom shelf is required to be taken out from the refrigerator, the rotating piece is rotated, the clamping part is separated from the clamping position, and the bottom shelf can be taken out from the refrigerator, so that the operation is convenient.

Drawings

Fig. 1 is a schematic structural view of a bottom shelf fixing structure according to a first embodiment;

FIG. 2 is a schematic view of a bottom shelf fixing structure according to another embodiment;

FIG. 3 is a schematic view of a bottom shelf fixing structure of the first embodiment;

fig. 4 is a schematic structural view of a rotating member of a bottom shelf fixing structure according to the first embodiment;

FIG. 5 is a schematic view of a bottom shelf fixing structure of the second embodiment;

FIG. 6 is a schematic view of another direction of the bottom shelf fixing structure of the second embodiment;

in the figure: 1. connecting piece, 11, supporting seat, 111, extension part, 12, clamping position, 13, connecting column, 14, positioning column, 15, rotating groove, 151, groove, 16, connecting annular wall, 161, avoiding groove, 17, rotating seat, 18, avoiding groove, 19, supporting wall, 2, rotating piece, 21, rotating part, 211, rotating seat, 2111, protruding part, 212, rotating connecting part, 2121, deformation groove, 213, limiting block and 22, clamping part

The implementation and advantages of the functions of the present utility model will be further described with reference to the accompanying drawings.

Detailed Description

Various embodiments of the utility model are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

It should be noted that all directional indicators (such as up, down, left and right, front and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the utility model solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

For a further understanding of the nature, features, and efficacy of the present utility model, the following examples are set forth in order to provide a further understanding of the utility model, and are intended to be described in connection with the accompanying drawings:

embodiment one:

the embodiment discloses a bottom shelf fixing structure, please refer to fig. 1 to 4, the bottom shelf fixing structure disclosed in the embodiment comprises a connecting piece 1 and a rotating piece 2, the connecting piece 1 is used for being connected with a side wall surface of a refrigerator, a supporting seat 11, a clamping position 12, a connecting column 13 and a positioning column 14 are arranged on the connecting piece 1, the supporting seat 11 and the clamping position 12 are positioned on the outer side of the connecting piece 1, the connecting column 13 and the positioning column 14 are positioned on the inner side of the connecting piece 1, and screw holes are arranged on the connecting column 13; the rotating member 2 includes a rotating portion 21 and a locking portion 22, the rotating portion 21 is rotatably connected with the connecting member 1, and the locking portion 22 is locked in the locking position 12 or separated from the locking position 12 when the rotating member 2 is rotated. For clarity of description, the inner side of the connector 1 refers to the side where the connector 1 is connected to the side wall of the refrigerator, and the outer side of the connector 1 refers to the side where the connector 1 is far from the side wall of the refrigerator. When the bottom shelf fixing structure is used, the inner side of the connecting piece 1 faces the side wall surface of the refrigerator, the positioning column 14 of the connecting piece 1 stretches into the positioning hole of the side wall surface of the refrigerator, then the connecting column 13 is aligned with the connecting hole on the side wall surface of the refrigerator, a screw penetrates through the screw hole on the connecting column 13 and the connecting hole on the side wall surface of the refrigerator, the connecting piece 1 can be fixed on the side wall surface of the refrigerator, when the bottom shelf is placed in the refrigerator, the bottom shelf is placed on the supporting seat 11 of the connecting piece 1, the supporting seat 11 supports grid lines of the edge of the bottom shelf, then a rotating force is applied to the rotating part 21 of the rotating piece 2, the rotating part 21 of the rotating piece 2 rotates, and the clamping part 22 of the rotating piece 2 is clamped with the clamping position 12 on the connecting piece 1, so that the grid lines of the edge of the bottom shelf are limited in the supporting seat 11 by the clamping part 22; the bottom shelf fixing structures are symmetrically arranged on the side wall surfaces of two sides of the refrigerator, the supporting seats 11 on the side wall surfaces of two sides of the refrigerator respectively support the grid lines of the edges of the two sides of the bottom shelf, after the bottom shelf is installed in the refrigerator, the bottom shelf cannot move, when the bottom shelf needs to be taken out of the refrigerator, the rotating piece 2 is rotated, the clamping part 22 is separated from the clamping position 12, and the bottom shelf can be taken out of the refrigerator, so that the operation is convenient.

Referring to fig. 2, in the bottom shelf fixing structure of the present embodiment, the positioning column 14 has a conical shape, and the radius of the cross section of the end of the positioning column 14 far from the connecting piece 1 is the smallest, so that the smaller the outer diameter of the positioning column 14 is, the smaller the outer diameter of the positioning column is, and the material can be saved while the strength of the positioning column 14 is not affected.

Referring to fig. 1 to 3, in the bottom shelf fixing structure of the present embodiment, support walls 19 are disposed on two sides of the connecting member 1, the support walls 19 are L-shaped, including a vertical section perpendicular to the body of the connecting member 1 and a horizontal section parallel to the body of the connecting member 1, and the length of the vertical section is adapted to the length of the connecting post 13 and is smaller than the length of the positioning post 14. When connecting the connecting piece 1 with the side wall surface of the refrigerator, the horizontal section of the body of the supporting wall 19 is abutted to the side wall surface of the refrigerator, the contact area of the connecting piece 1 and the side wall surface of the refrigerator is increased, the connecting piece 1 is firmly connected on the side wall surface of the refrigerator, the positioning columns 14 extend out of the spaces defined by the supporting walls 19 on the two sides of the connecting piece 1 and the side wall surface of the refrigerator and then are inserted into the positioning holes on the side wall surface of the refrigerator, and the positioning columns 14 are aligned with the connecting holes on the side wall surface of the refrigerator, so that the connecting columns 13 and the positioning columns 14 are connected with the inner wall surface of the refrigerator.

Referring to fig. 3 and 4, in the bottom shelf fixing structure of the present embodiment, a rotating groove 15 is disposed at an upper end of the connecting member 1, a rotating portion 21 is rotatably connected in the rotating groove 15, a supporting seat 11 is formed by extending a lower end of the connecting member 1 outwards, a limiting groove is disposed at a side of the supporting seat 11 away from the connecting member 1, the limiting groove forms a clamping position 12, a left-right rotating portion 21 is rotated, and a clamping portion 22 is clamped into the clamping position 12 or separated from the clamping position 12. When the refrigerator is used, the rotating part 21 is rotated left and right, the rotating part 21 rotates in the rotating groove 15, the rotating part 21 drives the clamping part 22 to rotate, the clamping part 22 enters the limiting groove, grid lines at the edge of the bottom shelf are limited in the supporting seat 11, or the clamping part 22 slides out of the limiting groove, and at the moment, a user can take the bottom shelf out of the refrigerator. When in use, the limiting groove is an arc groove, the bottom of the clamping part 22 is provided with an arc convex block, and when the rotating part 21 rotates, the clamping part 22 rotates, and the arc convex block slides into the limiting groove or slides out of the limiting groove.

Referring to fig. 4, in the bottom shelf fixing structure of the present embodiment, the rotating portion 21 includes a rotating seat 211 and a rotating connecting portion 212, the rotating seat 211 is circular, the rotating connecting portion 212 is a ring with an outer diameter smaller than that of the rotating seat 211, a limiting block 213 is disposed on an outer wall surface of the rotating connecting portion 212, a connecting hole is disposed at a bottom of the rotating groove 15, the connecting hole extends toward an inner side of the connecting member 1 to form a connecting annular wall 16, an avoiding groove 161 adapted to the limiting block 213 is disposed on the connecting annular wall 16, the rotating seat 211 is rotatably connected in the rotating groove 15, the rotating connecting portion 212 is rotatably connected in the connecting annular wall 16, and the limiting block 213 is slidably connected to an outer edge of the connecting annular wall 16. When the connector 1 and the rotator 2 are assembled together, the stopper 213 on the outer wall surface of the swivel base 211 is aligned with the avoidance groove 161 on the connection annular wall 16, then the swivel base 211 is installed into the connection annular wall 16, the swivel base 211 penetrates through the connection hole at the bottom of the rotation groove 15 to enter the connection annular wall 16, when the swivel base 211 is installed into the rotation groove 15, the stopper 213 on the outer wall surface of the swivel base 211 protrudes from the connection annular wall 16, then the rotator 21 is rotated, the swivel base 211 rotates in the rotation groove 15, the rotator 212 rotates in the connection annular wall 16, the stopper 213 leaves the avoidance groove 161 and slides along the outer edge of the connection annular wall 16, and the rotator 21 is installed on the connector 1 in cooperation with the outer edges of the stopper 213 and the connection annular wall 16.

Referring to fig. 4, in the bottom shelf fixing structure of the present embodiment, a plurality of protrusions 2111 are uniformly distributed on a side of the swivel base 211 facing the connecting member 1. When the rotating part 21 is rotated, the rotating seat 211 rotates in the rotating groove 15, the protrusion 2111 presses the bottom of the rotating groove 15, and generates a larger friction force with the bottom of the rotating groove 15, and after the user rotates the rotating seat 211 by any angle, the rotating seat 211 stays at the rotating position.

Referring to fig. 3 and 4, in the bottom shelf fixing structure of the present embodiment, a plurality of grooves 151 adapted to the protrusions 2111 are formed at the bottom of the rotating groove 15, and the rotating portion 21 is rotated left and right, so that the protrusions 2111 enter one groove 151 from the other groove 151. The arc between two adjacent grooves 151 is the angle by which the rotating portion 21 rotates when the protrusion 2111 enters the other groove 151 from one groove 151. In the illustrated embodiment, four grooves 151 are disposed at the bottom of the rotating groove 15, the four grooves 151 are annularly arrayed at the bottom of the rotating groove 15 and are disposed right above, right below, right left and right sides of the rotating groove 15, two protrusions 2111 are disposed at the bottom of the rotating seat 211, the two protrusions 2111 are symmetrically distributed at 90 degrees and are located at two sides of the clamping portion 22, when the clamping portion 22 and the clamping position 12 are engaged with each other, the two protrusions 2111 are engaged with the grooves 151 right left and right sides of the bottom of the rotating groove 15, when the rotating portion 21 is rotated, the two protrusions 2111 slide out from the grooves 151 right left and right sides of the bottom of the rotating groove 15, after rotating by 90 degrees, the protrusions 2111 slide into the grooves 151 right above and right below the bottom of the rotating groove 15, and at this time the clamping portion 22 rotates by 90 degrees, slides out from the clamping position 12 and turns into a horizontal setting state.

Referring to fig. 2 and 4, in the bottom shelf fixing structure of the present embodiment, a deformation groove 2121 is disposed on the rotation connection portion 212, and the deformation groove 2121 is disposed along the length direction of the rotation connection portion 212. Since the swivel base 211 presses the bottom of the rotating groove 15 toward the boss 2111 on one side of the connection member 1 after the connection member 1 and the rotation member 2 are assembled together, the swivel base 211 rotates in the rotating groove 15 when the rotation member 21 is rotated, and friction exists between the boss 2111 and the bottom of the rotating groove 15; in addition, when the protruding portion 2111 slides out from the groove 151, there is a friction force between the groove 151 and the protruding portion 2111, in order to avoid the rotational connection portion 212 from being broken by torsion force at the connection annular wall 16 when the rotational connection portion 21 is rotated, the deformation groove 2121 is provided at the rotational connection portion 212, and when the rotational connection portion 21 is rotated, the rotational connection portion 212 is deformed by the friction force between the protruding portion 2111 and the bottom of the rotational groove 15 or the friction force between the groove 151 and the protruding portion 2111, the rotational connection portion 212 is deformed, and the rotational connection portion 212 can be prevented from being twisted.

Embodiment two:

the embodiment discloses a bottom shelf fixing structure, referring to fig. 5 and 6, the bottom shelf fixing structure disclosed in the embodiment comprises a connecting piece 1 and a rotating piece 2, wherein the connecting piece 1 is used for being connected with a side wall surface of a refrigerator, a supporting seat 11, a clamping position 12, a connecting column 13 and a positioning column 14 are arranged on the connecting piece 1, the supporting seat 11 and the clamping position 12 are positioned on the outer side of the connecting piece 1, the connecting column 13 and the positioning column 14 are positioned on the inner side of the connecting piece 1, and screw holes are formed in the connecting column 13; the rotating member 2 includes a rotating portion 21 and a locking portion 22, the rotating portion 21 is rotatably connected with the connecting member 1, and the locking portion 22 is locked in the locking position 12 or separated from the locking position 12 when the rotating member 2 is rotated. According to the bottom shelf fixing structure, when the bottom shelf fixing structure is used, the positioning column 14 of the connecting piece 1 stretches into the positioning hole of the side wall surface of the refrigerator, then the connecting column 13 is aligned with the connecting hole on the side wall surface of the refrigerator, the connecting piece 1 can be fixed on the side wall surface of the refrigerator by penetrating the screw hole on the connecting column 13 and the connecting hole on the side wall surface of the refrigerator, when the bottom shelf is placed in the refrigerator, the bottom shelf is placed on the supporting seat 11 of the connecting piece 1, the supporting seat 11 supports grid lines at the edge of the bottom shelf, then a rotating force is applied to the rotating part 21 of the rotating piece 2, the rotating part 21 of the rotating piece 2 is rotated, and the clamping part 22 of the rotating piece 2 is clamped with the clamping position 12 on the connecting piece 1, so that grid lines at the edge of the bottom shelf are limited in the supporting seat 11 by the clamping part 22; the bottom shelf fixing structures are symmetrically arranged on the side wall surfaces of two sides of the refrigerator, the supporting seats 11 on the side wall surfaces of two sides of the refrigerator respectively support the grid lines of the edges of the two sides of the bottom shelf, after the bottom shelf is installed in the refrigerator, the bottom shelf cannot move, when the bottom shelf needs to be taken out of the refrigerator, the rotating piece 2 is rotated, the clamping part 22 is separated from the clamping position 12, and the bottom shelf can be taken out of the refrigerator, so that the operation is convenient.

Referring to fig. 6, in the bottom shelf fixing structure of the present embodiment, the positioning column 14 has a conical shape, and the radius of the cross section of the end of the positioning column 14 far from the connecting piece 1 is the smallest, so that the smaller the outer diameter of the positioning column 14 is, the smaller the outer diameter of the positioning column is, and the material can be saved while the strength of the positioning column 14 is not affected.

Referring to fig. 5 and 6, in the bottom shelf fixing structure of the present embodiment, support walls 19 are disposed on two sides of the connecting member 1, the support walls 19 are L-shaped, including a vertical section perpendicular to the body of the connecting member 1 and a horizontal section parallel to the body of the connecting member 1, and the length of the vertical section is adapted to the length of the connecting post 13 and is smaller than the length of the positioning post 14. When connecting piece 1 with the lateral wall face of freezer, make spliced pole 13 and reference column 14 be connected with spliced pole and locating hole on the lateral wall face of freezer respectively, after spliced pole 13 and reference column 14 all are connected with the internal wall face of freezer, the horizontal segment of the body of supporting wall 19 supports to the lateral wall face of freezer on, increases the area of contact of connecting piece 1 and the lateral wall face of freezer, makes connecting piece 1 firm in connection on the lateral wall face of freezer.

Referring to fig. 5 and 6, in the bottom shelf fixing structure of the present embodiment, the supporting seat 11 is formed by extending the lower end of the connecting piece 1 outwards, an extending portion 111 extends upwards from one side of the supporting seat 11 away from the connecting piece 1, two sides of the upper end of the extending portion 111 are provided with rotating seats 17, one end of the rotating portion 21, which is engaged with the clamping portion 22, is rotationally connected with the rotating seats 17, the connecting piece 1 is provided with a buckle, the buckle forms a clamping position 12, the rotating portion 21 rotates up and down, and the clamping portion 22 is clamped into the clamping position 12 or separated from the clamping position 12. When the refrigerator is used, the rotating part 21 is rotated up and down, the rotating part 21 is rotated in the rotating seat 17, the rotating part 21 drives the clamping part 22 to rotate, the clamping part 22 is clamped with the clamping buckle, grid lines at the edge of the bottom shelf are limited in the supporting seat 11, or the clamping part 22 is separated from the clamping buckle, and at the moment, a user can take out the bottom shelf from the refrigerator.

Referring to fig. 5 and 6, in the bottom shelf fixing structure of the present embodiment, a yielding groove 18 is provided on the connecting member 1, and a buckle is disposed in the yielding groove 18. When the clamping part 22 moves to the clamping position 12 or slides out of the clamping position 12, the clamping part 22 can extrude the clamping part 22 to the outer side of the connecting piece 1, so that the buckle is arranged in the yielding groove 18, and when the buckle is extruded, the buckle can incline to the outer side of the connecting piece 1 in the yielding groove 18, so that the buckle has elasticity, and the clamping part 22 can be conveniently clamped or separated from the buckle.

Referring to fig. 5 and 6, in the bottom shelf fixing structure of the present embodiment, the rotating portion 21 is formed by extending the end of the locking portion 22 away from the connecting member 1 obliquely upward. The rotating shaft is extended from two sides of one end of the rotating part 21, which is connected with the clamping part 22, the rotating shaft is rotationally connected with the rotating seat 17, one end of the rotating part 21, which is far away from the rotating seat 17, extends to the outer side of the connecting piece 1, when the rotating part 21 is rotated, a user moves the end of the rotating part 21, which is far away from the rotating seat 17, upwards or downwards, the rotating shaft rotates around the rotating seat 17, and the clamping part 22 is clamped into or separated from the buckle, so that the operation of the user is convenient.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A bottom shelf securement structure, comprising:

the connecting piece (1) is provided with a supporting seat (11), a clamping position (12), a connecting column (13) and a positioning column (14), wherein the supporting seat (11) and the clamping position (12) are positioned on the outer side of the connecting piece (1), the connecting column (13) and the positioning column (14) are positioned on the inner side of the connecting piece (1), and a screw hole is formed in the connecting column (13);

the rotating piece (2) comprises a rotating part (21) and a clamping part (22), the rotating part (21) is rotationally connected with the connecting piece (1), the rotating piece (2) rotates, and the clamping part (22) is clamped into the clamping position (12) or separated from the clamping position (12).

2. The bottom shelf fixing structure according to claim 1, wherein a rotating groove (15) is formed in the upper end of the connecting piece (1), the rotating portion (21) is rotatably connected in the rotating groove (15), the supporting seat (11) is formed by extending the lower end of the connecting piece (1) outwards, a limiting groove is formed in one side, away from the connecting piece (1), of the supporting seat (11), the limiting groove forms the clamping position (12), the rotating portion (21) is rotated left and right, and the clamping portion (22) is clamped into the clamping position (12) or separated from the clamping position (12).

3. The bottom shelf fixing structure according to claim 2, wherein the rotating part (21) comprises a rotating seat (211) and a rotating connecting part (212), the rotating seat (211) is circular, the rotating connecting part (212) is a circular ring with the outer diameter smaller than that of the rotating seat (211), a limiting block (213) is arranged on the outer wall surface of the rotating connecting part (212), a connecting hole is arranged at the bottom of the rotating groove (15), a connecting annular wall (16) extends towards the inner side of the connecting piece (1), an avoidance groove (161) matched with the limiting block (213) is formed in the connecting annular wall (16), the rotating seat (211) is rotatably connected in the rotating groove (15), the rotating connecting part (212) is rotatably connected in the connecting annular wall (16), and the limiting block (213) is slidably connected to the outer edge of the connecting annular wall (16).

4. A bottom shelf fixing structure according to claim 3, wherein a plurality of protrusions (2111) are uniformly distributed on a side of the swivel base (211) facing the connecting member (1).

5. The bottom shelf fixing structure according to claim 4, wherein the bottom of the rotation groove (15) is provided with a plurality of grooves (151) adapted to the protrusions (2111), the rotation part (21) is rotated left and right, and the protrusions (2111) enter one groove (151) from the other groove (151).

6. The bottom shelf fixing structure according to claim 4, wherein the rotation connection part (212) is provided with a deformation groove (2121), and the deformation groove (2121) is provided along a length direction of the rotation connection part (212).

7. The bottom shelf fixing structure according to claim 1, wherein the supporting seat (11) is formed by extending outwards from the lower end of the connecting piece (1), an extending portion (111) extends upwards from one side of the supporting seat (11) away from the connecting piece (1), rotating seats (17) are arranged on two sides of the upper end of the extending portion (111), one end, connected with the clamping portion (22), of the rotating portion (21) is rotationally connected with the rotating seats (17), a buckle is arranged on the connecting piece (1), the buckle forms the clamping position (12), the rotating portion (21) rotates up and down, and the clamping portion (22) is clamped into the clamping position (12) or separated from the clamping position (12).

8. The bottom shelf fixing structure according to claim 7, wherein the connecting piece (1) is provided with a yielding groove (18), and the buckle is arranged in the yielding groove (18).

9. The bottom shelf fixing structure according to claim 7, wherein the rotating portion (21) is formed by extending obliquely upward from an end of the engaging portion (22) away from the connecting member (1).

10. The bottom shelf fixation structure according to claim 1, characterized in that the two sides of the connecting piece (1) are provided with supporting walls (19), the supporting walls (19) are L-shaped, comprising a vertical section perpendicular to the body of the connecting piece (1) and a horizontal section parallel to the body of the connecting piece (1), the length of the vertical section being adapted to the length of the connecting column (13) and being smaller than the length of the positioning column (14).