Folding cabinet

Abstract

The utility model provides a folding cabinet which comprises at least one cabinet body and a top cover, the cabinet body comprises a bottom plate, a side plate, a back plate and a door plate assembly, the side plate comprises two unit side plates which are mutually pivoted, the rear edge of the bottom plate is pivoted with the lower edge of the back plate, and the side edge of the bottom plate is detachably connected with the lower edge of the side plate; the door plate assembly comprises a door frame with a pick-and-place opening and a flexible rolling door suitable for sealing the pick-and-place opening, a set of opposite and parallel first guide rails are formed on the inner side of the door frame, at least one set of opposite and parallel second guide rails are arranged in the cabinet body, the first guide rails are communicated with the second guide rails, and at least one second guide rail is arranged on the top cover. At least one second guide rail is arranged on the bottom plate; in the unfolded state, the flexible rolling door can move from the first guide rail to the second guide rail, and the taking and placing opening can be converted into the open state from the closed state. In the folding state, the flexible rolling door is completely contained in the first guide rail. Through the design of the flexible rolling door, the pick-and-place opening can be smoothly switched between a closed state and an open state.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of cabinet, especially relates to a folding cabinet. BACKGROUND

[0002] The folding cabinet is a common storage solution, which reduces the occupied space by folding and saves space when not in use. However, the existing folding cabinet design often has some limitations, the cabinet door opening mode is relatively single, which may not be fully opened in some special scenarios (such as narrow passages or space limited areas), affecting the taking and placing operation of the goods. In addition, for example, it is not convenient during folding and unfolding, and the cabinet door needs to be disassembled before folding. SUMMARY

[0003] In view of the defects of the prior art, the utility model aims to provide a folding cabinet to meet the needs of users.

[0004] To achieve the above purpose, the utility model provides a folding cabinet, which comprises at least one cabinet body with an upper end opening and a top cover suitable for detachably closing the cabinet body,

[0005] The cabinet body comprises a bottom plate, side plates, a back plate and a door plate assembly, the side plates are symmetrically arranged on both sides of the bottom plate, the back plate and the door plate assembly are oppositely arranged on the front and rear sides of the bottom plate, and the door plate assembly comprises a door frame with a taking and placing opening and a flexible rolling door suitable for closing the taking and placing opening.

[0006] The side plate comprises two unit side plates pivotally connected to each other, one of the unit side plates is pivotally connected to the door frame, the other unit side plate is pivotally connected to the back plate, the rear edge of the bottom plate is pivotally connected to the lower edge of the back plate, and the side edge of the bottom plate is detachably connected to the lower edge of the side plate.

[0007] The inner side of the door frame forms a set of first guide rails arranged opposite to each other and parallel to each other, the upper and lower edges of the flexible rolling door are slidingly accommodated in the first guide rails, at least one set of second guide rails arranged opposite to each other and parallel to each other is arranged in the interior of the cabinet body, the first guide rails are in communication with the second guide rails, at least one of the second guide rails is arranged on the top cover, and at least one of the second guide rails is arranged on the bottom plate.

[0008] In the unfolded state, the bottom plate is arranged perpendicular to the back plate, the detachable connection between the bottom plate and the side plate makes the side plate remain flat, the flexible rolling door can be moved from the first guide rail to the second guide rail, and the taking and placing opening can be changed from the closed state to the open state.

[0009] In the folded state, the back plate is flipped up to overlap with the back plate, the unit side plate is flipped inwards to the overlapped state, the back plate and the door plate assembly are close to each other, and the flexible roll door is completely accommodated in the first guide rail.

[0010] As preferred, the cabinet body is internally provided with two groups of the second guide rails, one of each group is arranged at the side edge of the top cover, and the other of each group is arranged at the side edge of the bottom plate.

[0011] As preferred, the first guide rail comprises a horizontal segment and an arc segment arranged at both ends of the horizontal segment, the horizontal segment is arranged along the tangent of the arc segment, the arc segment is communicated with the second guide rail, and the second guide rail is arranged along the tangent direction of the arc segment.

[0012] As preferred, the flexible roll door comprises two symmetrically arranged roll door sheets, the roll door sheet is unfolded to be square or rectangular, the roll door sheet comprises a horizontal edge suitable for defining the length thereof and a vertical edge suitable for defining the height thereof, the vertical edge comprises a first side edge and a second side edge, the first side edge forms a right angle with the horizontal edge, the second side edge forms a round angle with the horizontal edge, and the two first side edges are attached to completely close the taking and placing opening.

[0013] As preferred, the round angle corresponds to a transition radius, and the depth of the first guide rail and the depth of the second guide rail are not less than the transition radius.

[0014] As preferred, the length of the horizontal edge is not less than half of the length of the horizontal segment, and the length of the horizontal edge is not greater than half of the first guide rail.

[0015] As preferred, the door frame comprises a horizontal frame strip and a vertical frame strip suitable for enclosing the taking and placing opening, and the vertical frame strip is suitable for shielding part of the arc segment.

[0016] When the flexible roll door is closed, the vertical frame strip is suitable for shielding the round angle.

[0017] The vertical frame strip comprises a stop surface, the roll door sheet comprises a handle strip arranged adjacent to the first side edge, and when the flexible roll door is completely opened, the stop surface abuts against and limits the handle strip.

[0018] As preferred, the bottom plate comprises a plurality of horizontal long shafts and a plurality of horizontal short shafts arranged at both sides of the bottom plate, the lower edge of the back plate is formed with a plurality of C-shaped grooves and annular grooves arranged at both sides of the C-shaped grooves, the C-shaped grooves are formed with openings towards the bottom plate, the C-shaped grooves are suitable for supporting the horizontal long shafts and limiting the horizontal long shafts in the vertical direction, and the annular grooves are suitable for supporting the horizontal short shafts and limiting the horizontal short shafts in the horizontal direction.

[0019] Preferably, the bottom plate comprises a protruding front edge strip, and the inner side of the door frame is formed with a supporting step adapted to support the front edge strip.

[0020] The front edge strip comprises a plurality of open-ended guide grooves, and the front surface of the front edge strip is provided with a plurality of limiting buckles; the supporting step comprises a horizontal step surface and a vertical step wall, and the step surface is provided with a plurality of guide blocks, and the step wall is formed with a plurality of limiting grooves.

[0021] During the process of downwardly overturning the bottom plate to the horizontal state, the limiting buckles and the limiting grooves are vertically connected and matched, the guide blocks and the guide grooves are inserted and matched, and the limiting is formed in the horizontal direction.

[0022] Preferably, the side plate is inserted and matched with the top cover, the outer surface of the side plate is recessed inwardly and formed with a first avoiding groove, the side surface of the top cover is recessed inwardly and formed with a second avoiding groove, the first avoiding groove and the second avoiding groove are communicated, one of the first avoiding groove and the second avoiding groove is internally pivoted with a pressing buckle, and the other of the first avoiding groove and the second avoiding groove is internally provided with a buckle connecting edge; the pressing buckle and the buckle connecting edge are matched to keep the side plate and the top cover relatively fixed.

[0023] Preferably, a plurality of the cabinet bodies are arranged longitudinally, the cabinet bodies share one top cover, longitudinally adjacent two cabinet bodies share one bottom plate, and the lower surface of the bottom plate is formed with the second guide rail; and / or, two cabinet bodies share one side plate.

[0024] Preferably, the upper and lower ends of the side plate are respectively recessed inwardly and formed with a first avoiding groove and a second avoiding groove, longitudinally adjacent two side plates are inserted and matched, the first avoiding groove and the second avoiding groove are communicated, one of the first avoiding groove and the second avoiding groove is internally pivoted with a pressing buckle, and the other of the first avoiding groove and the second avoiding groove is internally provided with a buckle connecting edge; the pressing buckle and the buckle connecting edge are matched to keep the adjacent two side plates relatively fixed.

[0025] Preferably, the upper edge of the side plate is provided with two protruding teeth, the first avoiding groove is arranged between the two protruding teeth, and the top cover and the side plate comprise grooves adapted to match the protruding teeth and the second avoiding groove arranged between the grooves.

[0026] The utility model discloses the beneficial effect is:

[0027] (1) The flexible roll door combines a specially designed first guide rail and a second guide rail, so that the opening mode of the cabinet door is more flexible. In the unfolded state, the flexible roll door can move smoothly in the guide rail, from the first guide rail to the second guide rail, to realize the conversion between the closed and open states of the taking and placing opening. Even in the case that the space around the cabinet body is relatively narrow, the flexible movement of the roll door can facilitate the taking and placing of articles, avoiding the inconvenience caused by the limited opening angle of the traditional cabinet door.

[0028] (2) The back plate overlaps the bottom plate, and the side plate is turned inward, effectively reducing the occupied space and facilitating transportation and storage. In use, the cabinet body can be unfolded into a complete cabinet body according to the actual space requirement, which can effectively utilize the space, and is especially suitable for places with limited space or places where the layout needs to be frequently changed.

[0029] (3) The connection mode between the components of the cabinet body is simple and ingenious, such as the pivotal connection between the side plate and the back plate, the bottom plate, the plug-in connection between the side plate and the top cover, and the relative fixation realized by the pressing buckle and the buckling edge, and the design of shared components between the longitudinally and transversely adjacent cabinet bodies, which optimizes the arrangement and space utilization of multiple cabinet bodies, and also enables the cabinet to be quickly assembled whether it is a single assembly or a multiple combination installation.

[0030] (4) The bottom plate and the back plate are supported and limited by the groove shaft with a special shape, the door frame and the flexible roll door are precisely limited and shielded by the stop surface, the door handle strip and other structures, the side plate and the top cover, and the adjacent side plates are clamped, which ensures the safety and reliability of the cabinet during normal use, and can carry and protect the stored articles. BRIEF DESCRIPTION OF DRAWINGS

[0031] Fig. 1 is a structural schematic view of a folding cabinet provided by the present application.

[0032] Fig. 2 is a perspective view of the folding cabinet from another angle provided by the present application.

[0033] Fig. 3 is an assembly schematic view of a door plate assembly and a bottom plate provided by the present application.

[0034] Fig. 4 is a cross-sectional schematic view of the door plate assembly and the bottom plate provided by the present application.

[0035] Fig. 5 is a structural schematic view of the bottom plate provided by the present application.

[0036] Fig. 6 is a structural schematic view of the top cover provided by the present application.

[0037] Fig. 7 is a structural schematic view of the back plate provided by the present application.

[0038] Fig. 8 is a structural schematic view of a door frame cabinet provided by the present application.

[0039] Fig. 9 is a structural schematic view of the door piece provided by the utility model.

[0040] Fig. 10 is a schematic view of the folding state of the folding cabinet provided by the utility model.

[0041] In the figure, the cabinet body 100, the bottom plate 101, the side plate 102, the unit side plate 103, the back plate 104, the door plate assembly 105, the door frame 106, the flexible door 107, the door piece 108, the first guide rail 109, the second guide rail 110, the horizontal section 111, the arc section 112, the horizontal frame strip 113, the vertical frame strip 114, the horizontal edge 115, the first side edge 116, the second side edge 117, the round corner part 118, the door handle strip 119, the C-shaped groove 120, the annular groove 121, the horizontal long axis 122, the horizontal short axis 123, the front edge strip 124, the limiting buckle 126, the support step 127, the guide block 128, the limiting groove 129, the first avoiding groove 130, the second avoiding groove 131, the pressing buckle 132, the buckle joint edge 133, the top cover 200. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model is described in detail below in combination with the drawings and specific embodiments.

[0043] Here, it also needs to be explained that, in order to avoid the fact that the utility model is obscured by unnecessary details, only the structures and / or processing steps closely related to the scheme of the utility model are shown in the drawings, and other details not closely related to the utility model are omitted.

[0044] In addition, it also needs to be explained that the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0045] As Figures 1-10The folding cabinet comprises two cabinet bodies 100 with open upper ends and a top cover 200 adapted to detachably close the cabinet bodies 100. The cabinet body 100 comprises a bottom plate 101, side plates 102, a back plate 104 and a door plate assembly 105. The side plates 102 are symmetrically arranged on both sides of the bottom plate 101, and the back plate 104 and the door plate assembly 105 are oppositely arranged on the front and rear sides of the bottom plate 101. The side plate 102 comprises two unit side plates 103 which are pivotally connected to each other. One unit side plate 103 is pivotally connected to the door plate, and the other unit side plate 103 is pivotally connected to the back plate 104. The rear edge of the bottom plate 101 is pivotally connected to the lower edge of the back plate 104, and the side edge of the bottom plate 101 is detachably connected to the lower edge of the side plate 102. The longitudinally arranged cabinet bodies 100 share one top cover 200, and the longitudinally adjacent cabinet bodies 100 share one bottom plate 101. The door plate assembly 105 comprises a door frame 106 with a taking and placing opening and a flexible roll door 107 adapted to close the taking and placing opening. The flexible roll door 107 comprises two symmetrically arranged roll door sheets 108. The inner side of the door frame 106 is formed with a set of first guide rails 109 which are oppositely and parallelly arranged. The upper and lower edges of the flexible roll door 107 are slidingly accommodated in the first guide rails 109. Two sets of second guide rails 110 are arranged in each cabinet body 100. In the first layer cabinet body 100, one of each set of second guide rails 110 is arranged at the side edge of the top cover 200, and the other of each set of second guide rails 110 is arranged at the side edge of the bottom plate 101. In the second layer cabinet body 100, the lower surface of the shared bottom plate 101 is formed with two second guide rails 110, and the upper surface of the other bottom plate 101 is formed with two second guide rails 110. The first guide rails 109 are in communication with the second guide rails 110.

[0046] In the unfolded state, the bottom plate 101 is arranged perpendicularly to the back plate 104, the detachable connection between the bottom plate 101 and the side plate 102 enables the side plate 102 to remain flat, the flexible roll door 107 can be moved from the first guide rail 109 to the second guide rail 110, and the taking and placing opening can be switched from the closed state to the open state. In the folded state, the back plate 104 is flipped upward to overlap with the back plate 104, the first side plate 102 and the second side plate 102 are flipped inward to overlap, the back plate 104 and the door plate assembly 105 are thereby moved close to each other, and the flexible roll door 107 is completely accommodated in the first guide rail 109.

[0047] In the present embodiment, the door frame 106 comprises horizontal frame strips 113 and vertical frame strips 114 which are adapted to surround and form the taking and placing opening. The first guide rail 109 is arranged in the horizontal frame strip 113. The first guide rail 109 comprises a horizontal segment 111 and arc-shaped segments 112 arranged at both ends of the horizontal segment 111. The horizontal segment 111 is arranged along the tangent of the arc-shaped segment 112. The arc-shaped segment 112 is in communication with the second guide rail 110. The second guide rail 110 is arranged along the direction of the tangent of the arc-shaped segment 112. The vertical frame strip 114 is adapted to shield part of the arc-shaped segment 112. Furthermore, the length of the horizontal edge 115 is not less than half the length of the horizontal segment 111, and the length of the horizontal edge 115 is not greater than half the length of the first guide rail 109.

[0048] In the embodiment, the curtain 108 is unfolded to a square or rectangle shape, the curtain 108 includes a horizontal edge 115 adapted to define a length thereof and a vertical edge adapted to define a height thereof, the vertical edge includes a first side edge 116 and a second side edge 117, the first side edge 116 forms a right angle with the horizontal edge 115 respectively, the second side edge 117 forms a rounded corner 118 with the horizontal edge 115, and the two first side edges 116 are attached to completely close the access opening. The rounded corner 118 corresponds to a transition radius, the depth of the first guide rail 109 and the depth of the second guide rail 110 are not less than the transition radius. When the flexible curtain 107 is closed, the second frame surface is adapted to shield the rounded corner 118. The vertical frame strip 114 includes a stop surface, the curtain 108 includes a handle strip 119 arranged adjacent to the first side edge 116, and when the flexible curtain 107 is completely opened, the stop surface abuts against the handle strip 119.

[0049] In the embodiment, the bottom plate 101 includes a plurality of horizontal long axes 122 and a plurality of horizontal short axes 123 arranged on both sides of the bottom plate 101, the lower edge of the back plate 104 forms a plurality of C-shaped grooves 120 and a plurality of annular grooves 121 arranged on both sides of the C-shaped grooves 120, the C-shaped grooves 120 form an opening towards the bottom plate 101, the C-shaped grooves 120 are adapted to support the horizontal long axes 122 and constitute a limit in the vertical direction, and the annular grooves 121 are adapted to support the horizontal short axes 123 and constitute a limit in the horizontal direction. The bottom plate 101 includes a protruding front edge strip 124, and the inner side of the door frame 106 forms a support step 127 adapted to support the front edge strip 124. Further, the front edge strip 124 includes a plurality of guide grooves with open lower ends, the front surface of the front edge strip 124 is provided with a plurality of limiting buckles 126, the support step 127 includes a horizontal step surface and a vertical step wall, the step surface is provided with a plurality of guide blocks 128, and the step wall forms a plurality of limiting grooves 129. During the process of the bottom plate 101 being flipped down to the horizontal state, the limiting buckles 126 and the limiting grooves 129 are vertically clamped and matched, and the guide blocks 128 and the guide grooves are inserted and matched and constitute a limit in the horizontal direction.

[0050] In the embodiment, the side plate 102 is inserted into the top cover 200, the two side plates 102 longitudinally adjacent are inserted into each other, the upper and lower ends of the side plate 102 are respectively concavely formed with the first avoiding groove 130 and the second avoiding groove 131, further, the upper edge of the side plate 102 is provided with two protruding teeth, the first avoiding groove 130 is arranged between the two protruding teeth, the top cover 200 and the side plate 102 are provided with the recesses matched with the protruding teeth and the second avoiding groove 131 arranged between the recesses. The first avoiding groove 130 and the second avoiding groove 131 are communicated, one of the first avoiding groove 130 and the second avoiding groove 131 is internally pivoted with the pressing buckle 132, the other of the first avoiding groove 130 and the second avoiding groove 131 is internally arranged with the buckling edge 133, the pressing buckle 132 and the buckling edge 133 are matched to keep the side plate 102 and the top cover 200 relatively fixed, and the pressing buckle 132 and the buckling edge 133 are matched to keep the two adjacent side plates 102 relatively fixed.

[0051] Through the unique cabinet body structure design, the folding function of the cabinet is realized, the transportation and storage are facilitated, the flexible roll door and the special guide rail design are adopted, the cabinet door opening mode is optimized, the article taking and placing in different space scenes are adapted, meanwhile, through the ingenious connection mode between the parts, such as the pivotable and detachable connection between the side plate, the bottom plate, the back plate and the top cover, and the shared and connected design between the side plate and the side plate and between the cabinet body and the cabinet body, the quick assembly and disassembly are realized, and the applicability and convenience of the cabinet in different scenes are improved.

[0052] The above embodiment is only used to illustrate the technical scheme of the utility model and is not limited, although the utility model is described in detail with reference to the preferred embodiment, it should be understood by those skilled in the art that the technical scheme of the utility model can be modified or replaced equivalently without departing from the spirit and range of the technical scheme of the utility model.

Claims

1. A folding cabinet, characterized in that, The cabinet comprises a cabinet body with an open top end and a top cover adapted to detachably close the cabinet body, The cabinet body comprises a bottom plate, side plates symmetrically arranged on both sides of the bottom plate, a back plate and a door plate assembly oppositely arranged on the front and back sides of the bottom plate, and the door plate assembly comprises a door frame with a taking and placing opening and a flexible roll door adapted to close the taking and placing opening, The side plate comprises two unit side plates pivotally connected to each other, one of the unit side plates is pivotally connected to the door frame, the other unit side plate is pivotally connected to the back plate, the rear edge of the bottom plate is pivotally connected to the lower edge of the back plate, and the side edge of the bottom plate is detachably connected to the lower edge of the side plate; The inner side of the door frame is formed with a set of first guide rails arranged opposite and parallel to each other, the upper and lower edges of the flexible roll door are slidingly accommodated in the first guide rails, and the interior of the cabinet is provided with at least one set of second guide rails arranged opposite and parallel to each other, the first guide rails are in communication with the second guide rails, and at least one of the second guide rails is arranged on the top cover and at least one of the second guide rails is arranged on the bottom plate; In the unfolded state, the bottom plate is arranged perpendicular to the back plate, the bottom plate is detachably connected to the side plate so that the side plate remains unfolded, the flexible roll door can be moved from the first guide rail to the second guide rail, and the taking and placing opening can be switched from the closed state to the open state; In the folded state, the back plate is flipped upward to overlap with the back plate, the unit side plates are flipped inward to the overlapped state, the back plate and the door plate assembly are close to each other, and the flexible roll door is completely accommodated in the first guide rail.

2. The folding cabinet of claim 1, wherein, The interior of the cabinet is provided with two sets of second guide rails, one of each set of second guide rails is arranged on the side edge of the top cover, and the other of each set of second guide rails is arranged on the side edge of the bottom plate.

3. The folding cabinet of claim 2, wherein, The first guide rail comprises a horizontal section and an arc-shaped section arranged at both ends of the horizontal section, the horizontal section is arranged along the tangent of the arc-shaped section, the arc-shaped section is in communication with the second guide rail, and the second guide rail is arranged along the tangent direction of the arc-shaped section.

4. The folding cabinet of claim 3, wherein, The flexible roll door comprises two symmetrically arranged roll door pieces, the roll door pieces are unfolded to be square or rectangular, the roll door pieces comprise a horizontal edge adapted to define the length thereof and a vertical edge adapted to define the height thereof, the vertical edge comprises a first side edge and a second side edge, the first side edge forms a right angle with the horizontal edge respectively, the second side edge forms a rounded corner with the horizontal edge, and the two first side edges are fitted to completely close the taking and placing opening.

5. The folding cabinet of claim 4, wherein, The door frame comprises a horizontal frame strip and a vertical frame strip adapted to enclose the taking and placing opening, and the vertical frame strip is adapted to shield part of the arc-shaped section, wherein: When the flexible roll door is closed, the vertical frame strip is adapted to shield the rounded corner; The vertical frame strip comprises a stop surface, the roll door piece comprises a handle strip arranged adjacent to the first side edge, and when the flexible roll door is completely opened, the stop surface abuts against the handle strip to limit the handle strip.

6. The folding cabinet of claim 5, wherein, The bottom plate comprises horizontal long axes and horizontal short axes arranged on both sides of the bottom plate, and the lower edge of the back plate is formed with C-shaped grooves and annular grooves arranged on both sides of the C-shaped grooves, the C-shaped grooves are formed with openings towards the bottom plate, and the C-shaped grooves are suitable for supporting the horizontal long axes and limiting the horizontal long axes in the vertical direction, and the annular grooves are suitable for supporting the horizontal short axes and limiting the horizontal short axes in the horizontal direction.

7. The folding cabinet of claim 6, wherein, The bottom plate comprises a protruding front edge strip, and the inner side of the door frame is formed with a support step suitable for supporting the front edge strip, wherein: The front edge strip comprises a plurality of open-ended guide grooves, the front surface of the front edge strip is provided with a plurality of limiting buckles, the support step comprises a horizontally arranged step surface and a vertically arranged step wall, the step surface is provided with a plurality of guide blocks, and the step wall is formed with a plurality of limiting grooves. During the process of turning the bottom plate downward to the horizontal state, the limiting buckles and the limiting grooves are vertically connected and matched, the guide blocks and the guide grooves are inserted and matched and limited in the horizontal direction.

8. The folding cabinet of claim 1, wherein, The side plate and the top cover are inserted and matched, the outer surface of the side plate is recessed inwardly to form a first avoiding groove, the side surface of the top cover is recessed inwardly to form a second avoiding groove, the first avoiding groove and the second avoiding groove are communicated, one of the first avoiding groove and the second avoiding groove is internally pivoted with a pressing buckle, the other of the first avoiding groove and the second avoiding groove is internally provided with a buckle connecting edge, and the pressing buckle and the buckle connecting edge are matched to keep the side plate and the top cover relatively fixed.

9. The folding cabinet of claim 1, wherein, A plurality of the cabinet bodies are arranged longitudinally, the cabinet bodies share one top cover, longitudinally adjacent two cabinet bodies share one bottom plate, and the lower surface of the bottom plate is formed with the second guide rail; and / or, transversely adjacent two cabinet bodies share one side plate.

10. The folding cabinet of claim 9, wherein, The upper and lower ends of the side plate are respectively recessed inwardly to form a first avoiding groove and a second avoiding groove, longitudinally adjacent two side plates are inserted and matched, the first avoiding groove and the second avoiding groove are communicated, one of the first avoiding groove and the second avoiding groove is internally pivoted with a pressing buckle, the other of the first avoiding groove and the second avoiding groove is internally provided with a buckle connecting edge, and the pressing buckle and the buckle connecting edge are matched to keep the adjacent two side plates relatively fixed.

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