Writable support

Abstract

The utility model provides a writable support, which belongs to the technical field of office supplies and comprises a frame, a first connecting area, a second connecting area and a plurality of supporting rods. The first plate body and the second plate body are located in the first connecting area, the first plate body and the second plate body are oppositely arranged and connected with each other, the first plate body is connected to the frame limiting the first connecting area, a connecting structure is arranged between the first plate body and the second plate body, and the connecting structure is hidden in a gap between the first plate body and the second plate body; the supporting pipe is supported at the bottoms of the first plate body and the second plate body, and the first plate body and the second plate body are clamped between the supporting pipe and the frame. According to the writing support, the connecting structures between the plate bodies and the frame and between the plate bodies are hidden between the two plate bodies and are not in an exposed state, and therefore the overall attractiveness of the writing support is improved while the connecting strength is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to office equipment technical field relates to a writable support. BACKGROUND

[0002] The writing support usually contains two parts which are distributed in up and down, one part is whiteboard (the base material can be glass, board or sheet metal) which has writable surface, the other part is support leg which is used to support whiteboard. However, the existing writing support has the following problems:

[0003] Firstly, in order to improve the appearance of whiteboard part, the whole base material is usually bonded on the frame by colloid, so that although the screw is not exposed on the appearance, the production requirement of product is high, the cost is high, and there is the risk of cracking;

[0004] Secondly, in order to improve the stability of support part and avoid the product from shaking during writing, the whiteboard part is usually clamped between the support legs, at this time, the opposite two support legs need to be locked by fastener, which is not convenient to operate, and the end of fastener is in exposed state, which affects the appearance of the whole product. SUMMARY

[0005] The utility model discloses a kind of writable support which can improve the appearance of product on the basis of ensuring the stability of product, to solve the above problems of existing technology.

[0006] The utility model discloses a kind of writable support, which can be realized by the following technical solutions:

[0007] The frame is spliced by a plurality of frame strips, and a first connecting area is provided in the limited area of the frame.

[0008] The first plate body and the second plate body are located in the first connecting area, and the first plate body and the second plate body are oppositely arranged and connected to each other. The first plate body is connected to the frame that limits the first connecting area. A connecting structure is provided between the first plate body and the second plate body. The connecting structure is hidden in the gap between the first plate body and the second plate body.

[0009] The support pipe is supported at the bottom of the first plate body and the second plate body, and the first plate body and the second plate body are clamped between the support pipe and the frame.

[0010] In the above-mentioned writable support, the connecting structure includes a first clamping part provided on the first plate body and a second clamping part provided on the second plate body. The second clamping part is clamped on the first clamping part from bottom to top, completing the connection between the first plate body and the second plate body.

[0011] In the above-described writable support, the first clamping part comprises a first clamping member connected to the first plate body, and a through insertion channel is formed between the first clamping member and the first plate body.

[0012] In the above-described writable support, a retaining member is arranged in the gap between the first plate body and the second plate body, wherein the retaining member is connected to at least one of the frame, the first plate body and the second plate body.

[0013] In the above-described writable support, a groove is arranged on the retaining member along the axis direction of the retaining member, and a mounting hole is arranged on the groove bottom, when the retaining member is mounted, the fastener is inserted into the mounting hole from the groove opening and connected to at least one of the frame, the first plate body and the second plate body, wherein the end of the fastener is hidden in the groove.

[0014] In the above-described writable support, a fixing plate is arranged along at least two side edges of the first connecting area, and one end of the fixing plate is connected to the frame, and the other end is a free end, wherein the first plate body and the second plate body are located on the front and back sides of the free end, and the fastener is sequentially inserted through the free end and the first plate body to complete the connection therebetween, and the second plate body is clamped on the first plate body.

[0015] In the above-described writable support, the frame is a closed frame formed by splicing a plurality of frame strips end to end, and a second connecting area is arranged in the enclosed area of the frame, and the first connecting area and the second connecting area are arranged in the closed frame in an up-down distribution.

[0016] Both ends along the length direction of the support tube are provided with connecting members, the connecting members are located in the second connecting area, and the connecting members are connected to the frame and supported on the bottom of the support tube.

[0017] In the above-described writable support, a support leg is further included, the support leg is provided with an insertion part and a support plate, the frame and / or the connecting member is provided with an insertion slot, the insertion part is inserted into the insertion slot, and the support plate is connected to the bottom of the frame, when the insertion part is inserted into the insertion slot, the support leg can be pushed upward to realize the adhesion of the support plate and the frame.

[0018] In the above-described writable support, the bottom of the support tube is provided with a support plate, and the support plate is located in the second connecting area, one end of the support plate is connected to the support tube, and the other end is connected to the connecting member.

[0019] In the above one can write support, still including at least one function board, and the function board is provided with connecting plate, connecting plate is clamped between the frame and the support foot, and the connecting plate is provided with the jack that is inserted with the plug part cooperation, and the plug part of the support foot is inserted through the jack and is connected with the slot.

[0020] Compared with the prior art, the utility model has the advantages of:

[0021] (1), the utility model provides a kind of writable support, the connecting structure between plate body and frame, plate body and plate body between is hidden between two plate bodies, not in bare state, to improve the overall aesthetic degree of writable support while ensuring the connection strength.

[0022] (2), by setting support pipe, the freedom of first plate body, second plate body in vertical direction can be limited, the "lifting" of first plate body, second plate body is formed, so that first plate body, second plate body are clamped between support pipe and frame, to improve the reliability of writable support when user wipes the content on writable support, plate body does not occur mutual slippage between frame, improves the reliability of writable support use.

[0023] (3), by setting retaining member, the relative gap between first plate body and second plate body is further limited, and the retaining member is provided, can provide a better support for user when writing, improve the experience of user use.In addition, recess is set, so that the end of fastener used to fix retaining member can be hidden in recess, guarantee that the two ends of retaining member can be fully attached with first plate body, second plate body, and the gap between first plate body and second plate body is uniformed.

[0024] (4), by setting fixed plate, so that the connection between first plate body and frame is changed into the connection between first plate body and fixed plate, so that the fixing structure of first plate body can be hidden between first plate body and second plate body without being exposed, to improve the aesthetic degree of writable support, in addition, fixed plate is set, the contact area between first plate body and frame is increased, avoid first plate body from shaking after installation is completed, improve the installation strength of first plate body. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the structure diagram of the utility model one kind of writable support.

[0026] Figure 2 It is the explosion drawing of the upper part of the utility model one kind of writable support.

[0027] Figure 3 It is the partial explosion drawing of the utility model one kind of writable support.

[0028] Figure 4It is a structure schematic view of the upper part of the writable support.

[0029] Figure 5 Figure 4 The sectional view A-A is shown.

[0030] Figure 6 Figure 5 The partial enlarged view of part B in the sectional view is shown.

[0031] In the figure,

[0032] 10, frame; 11, frame strip; 12, first connecting area; 13, second connecting area; 14, slot;

[0033] 20, first plate body; 21, first clamping piece; 22, insertion channel;

[0034] 30, second plate body; 31, second clamping piece;

[0035] 40, support pipe;

[0036] 50, support leg; 51, insertion part; 52, support plate;

[0037] 60, retaining piece; 61, groove; 62, mounting hole;

[0038] 70, fixed plate; 71, free end;

[0039] 80, support plate;

[0040] 90, connecting piece;

[0041] 100, functional plate; 110, storage platform; 120, connecting plate; 130, insertion hole. DETAILED DESCRIPTION

[0042] The following is a specific embodiment of the utility model and in combination with the drawings, the technical scheme of the utility model is further described, but the utility model is not limited to these embodiments.

[0043] It should be noted that all directionality indications (such as up, down, left, right, front, back,...) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directionality indications also change accordingly.

[0044] As shown in the figure, Figures 1 to 6 The utility model provides a writable support, which comprises:

[0045] The frame 10 is a closed frame formed by a plurality of frame strips 11 spliced end to end, and a first connecting area 12 is arranged in the limited area of the frame 10.​​

[0046] The first plate body 20 and the second plate body 30 are located in the first connecting area 12, the first plate body 20 and the second plate body 30 are oppositely arranged and connected with each other, and the first plate body 20 is connected to the frame 10 defining the first connecting area 12, and a connecting structure is arranged between the first plate body 20 and the second plate body 30, which is hidden in the gap between the first plate body 20 and the second plate body 30.

[0047] The support pipe 40 supports the first plate body 20 and the second plate body 30 at the bottom and clamps the first plate body 20 and the second plate body 30 between the support pipe 40 and the frame 10.

[0048] In other embodiments, the frame 10 can also not be a closed frame. For example, the bottom of the frame 10 is open, and the first connecting area 12 is defined by the frame strips 11 on both sides and the top, and the support pipe 40 is plugged at the bottom opening of the frame 10, and the first plate body 20 and the second plate body 30 are clamped and fixed by the support pipe 40 and the frame 10 after being connected.

[0049] It is worth mentioning that in the prior art, the connection between the substrate and the frame of the writable support is generally achieved in two ways, one is to achieve the connection between the two by means of colloid, and the other is to achieve the connection between the two by means of fastener. Among them, for the first connection mode, there is a risk of "glue separation", which leads to low reliability of the connection between the substrate and the frame; for the second connection mode, the end of the fastener is in a naked state, which affects the aesthetics of the entire writable support, and is easy to scratch the user in the process of use.

[0050] And in this embodiment, although the connection between the substrate (such as the first plate body 20 and the second plate body 30 in this embodiment) and the frame (such as the frame 10 in this embodiment) is connected by means of fastener, the fastener is hidden in the gap between the first plate body 20 and the second plate body 30, and is not in a naked state, thereby ensuring the connection strength while improving the overall aesthetics of the writable support, in addition, the connection between the first plate body 20 and the second plate body 30 is also hidden in the gap between the two, which also ensures the overall aesthetics of the writable support.

[0051] It is further pointed out that in this embodiment, by arranging the support pipe 40, the freedom of the first plate body 20 and the second plate body 30 in the vertical direction can be limited, forming a "lifting" of the first plate body 20 and the second plate body 30, so that the first plate body 20 and the second plate body 30 are clamped between the support pipe 40 and the frame 10, thereby improving the reliability of the use of the writable support when the user wipes the content on the writable support, and preventing the plate body from slipping with the frame 10.

[0052] It is worth mentioning that the support pipe 40 is provided in a square tube, and the support pipe 40 is connected with the first plate body 20 and the second plate body 30 by fasteners, and the fastening direction of the fasteners is from bottom to top through the support pipe 40 and the plate body in sequence. By using such a connection mode, the fasteners are hidden, and the appearance of the writable support is ensured.

[0053] In some embodiments, in order to further control the relative distance between the first plate body 20 and the second plate body 30, and make the gap at each part between the first plate body 20 and the second plate body 30 uniform, two strip-shaped grooves 61 can be arranged on the support pipe 40, and the length direction of the strip-shaped grooves 61 is consistent with the length direction of the support pipe 40. In this way, when the support pipe 40 is connected with the plate body, the bottom edges of the first plate body 20 and the second plate body 30 can be directly embedded into the corresponding strip-shaped grooves 61, realizing the positioning connection between the support pipe 40 and the first plate body 20 and the second plate body 30. In this way, the parallelism between the first plate body 20 and the second plate body 30 is ensured, the flatness of the plate body surface of the assembled writable support is further improved, and the appearance of the writable support is further improved.

[0054] Among them, the connection of the support pipe 40 can be directly connected on the frame 10, or fixed on the frame 10 through other structures.

[0055] Preferably, the connection structure includes a first clamping part arranged on the first plate body 20 and a second clamping part arranged on the second plate body 30, and the second clamping part is clamped on the first clamping part from bottom to top, completing the connection between the first plate body 20 and the second plate body 30.

[0056] Further, the first clamping part includes a first clamping piece 21 connected to the first plate body 20, and an insertion channel 22 passing through from top to bottom is formed between the first clamping piece 21 and the first plate body 20; the second clamping part includes a second clamping piece 31, one end of which is connected to the second plate body 30, and the other end is kept a certain distance from the second plate body 30, forming an open gap, and the end is inserted into the insertion channel 22 from bottom to top.

[0057] It is worth mentioning that the clamping cooperation is one of the ways to realize the quick disassembly and assembly of the two, but the connection between the first plate body 20 and the second plate body 30 is not limited to clamping cooperation. In addition, when the first plate body 20 is connected in the first connection area 12, the installation of the second plate body 30 will be limited by the frame strip on the frame 10. Therefore, it is more appropriate to install the second plate body 30 on the first plate body 20 from bottom to top, and the connection mode is convenient to operate.

[0058] It is further pointed out that the first clamping piece 21 is arranged in a "se" shape, both ends of the first clamping piece 21 are connected to the first plate body 20 through fasteners, the middle part of the first clamping piece 21 is arranged in a convex shape, thereby forming a plug-in channel 22 between the first clamping piece 21 and the first plate body 20, the upper and lower ends of the plug-in channel 22 are in communication, and the side part is arranged in a closed manner. When the second clamping piece 31 is located in the plug-in channel 22, the side part of the plug-in channel 22 can limit the second plate body 30 from tilting away from the first plate body 20, thereby providing a reliable connection basis for connecting the second plate body 30 and the support pipe 40.

[0059] It is further pointed out that the second clamping piece 31 is arranged in an approximate Z shape, one end is connected to the second plate body 30, and the other end is connected to the first clamping piece 21. The Z-shaped second clamping piece 31 can control the depth of the second clamping piece 31 inserted into the first clamping piece 21 through the middle part of the second clamping piece 31, thereby ensuring that the first plate body 20 and the bottom of the second plate body 30 are flush, so that the first plate body 20 and the second plate body 30 can effectively abut when connected to the support pipe 40, avoiding gaps and improving the reliability of the connection.

[0060] It is worth mentioning that the number of first clamping pieces 21 and the number of second clamping pieces 31 are both multiple. As shown in the figure, the number of first clamping pieces 21 is nine, and the number of second clamping pieces 31 is also nine. The nine first clamping pieces 21 are arranged in a 3X3 array on the first plate body 20, and the nine second clamping pieces 31 are also arranged in a 3X3 array on the second plate body 30, so that the gap between the first plate body 20 and the second plate body 30 is uniform after connection, thereby improving the reliability of the connection between them.

[0061] Preferably, a retaining member 60 is arranged in the gap between the first plate body 20 and the second plate body 30, wherein the retaining member 60 is connected to at least one of the frame 10, the first plate body 20 and the second plate body 30.

[0062] Further preferably, a groove 61 is arranged on the retaining member 60 along the axis direction of the retaining member 60, and a mounting hole 62 is arranged on the groove bottom of the groove 61. When the retaining member 60 is installed, the fastener extends into the mounting hole 62 from the groove opening of the groove 61 and is connected to at least one of the frame 10, the first plate body 20 and the second plate body 30, wherein the end of the fastener is hidden in the groove 61.

[0063] In this embodiment, the retaining member 60 further limits the relative gap between the first plate body 20 and the second plate body 30, and the retaining member 60 can provide better support for users when writing, thereby improving the user experience.

[0064] In addition, the groove 61 is arranged so that the end of the fastener used to fix the holder 60 can be hidden in the groove 61, ensuring that the two ends of the holder 60 can be fully attached to the first plate body 20 and the second plate body 30, and the gap between the first plate body 20 and the second plate body 30 is uniform.

[0065] Preferably, a fixing plate 70 is arranged along at least two side edges of the first connecting area 12, and one end of the fixing plate 70 is connected to the frame 10, and the other end is a free end 71, wherein the first plate body 20 and the second plate body 30 are located on the front and back sides of the free end 71, and the connection between the first plate body 20 and the second plate body 30 is completed by the fastener sequentially passing through the free end 71 and the first plate body 20, and the second plate body 30 is clamped on the first plate body 20.

[0066] In the embodiment, by arranging the fixing plate 70, the connection between the first plate body 20 and the frame 10 is changed to the connection between the first plate body 20 and the fixing plate 70, so that the fixing structure of the first plate body 20 can be hidden between the first plate body 20 and the second plate body 30 without being exposed, thereby improving the appearance of the writable support, and in addition, the fixing plate 70 is arranged to increase the contact area between the first plate body 20 and the frame 10, avoiding the first plate body 20 from shaking after installation is completed, and improving the installation strength of the first plate body 20.

[0067] Preferably, the frame 10 further comprises a second connecting area 13 in the defined area, and the first connecting area 12 and the second connecting area 13 are arranged in the closed frame surrounded by the frame 10 in an up-down manner; the support pipe 40 is provided with a connecting piece 90 at both ends in the length direction, the connecting piece 90 is located in the second connecting area 13, and the connecting piece 90 is connected to the frame 10 and supported on the bottom of the support pipe 40.

[0068] It is further pointed out that the bottom of the support pipe 40 is provided with a support plate 80, and the support plate 80 is located in the second connecting area 13. The two ends of the support plate 80 are bent at right angles to each other, one end of the support plate 80 is attached to and connected to the bottom surface of the support pipe 40, and the other end of the support plate 80 is attached to and connected to the connecting piece 90.

[0069] Preferably, the writable support further comprises a support leg 50, the support leg 50 is provided with a plug-in part 51 and a support plate 52, the frame 10 and / or the connecting piece 90 is provided with a slot 14, the plug-in part 51 is plugged with the slot 14, the support plate 52 is connected to the bottom of the frame 10, when the plug-in part 51 is plugged with the slot 14, the support leg 50 is pushed upward, the support plate 52 can be attached to the bottom surface of the frame 10, and then the support plate 52 is fixedly connected to the bottom of the frame 10 by using screws, so as to realize the connection between the support leg 50 and the frame 10.

[0070] It is worth mentioning that the connection between the support leg 50 and the frame 10 is based on the connection between the support plate 52 and the frame 10, and the connection is hidden at the bottom of the frame 10, which also achieves the hiding of the connection structure, thereby improving the aesthetics of the entire writable support. In addition, the arrangement of the support plate 52 can support the upper part structure of the writable support, avoid the "sinking" phenomenon of the upper part structure of the writable support, and improve the reliability of the use of the writable support.

[0071] It is further pointed out that the number of support legs 50 is four, two by two, and each group of two support legs 50 is located on the front and rear sides of the frame 10, clamping the frame 10 between the two support legs 50 on the front and rear sides, and the connection between the support leg 50 and the frame 10 is completed by the fastener, and the connection structure between the support leg 50 and the frame 10 is hidden at the bottom of the frame 10; or the number of support legs 50 is two, and the two support legs 50 are located on the left and right sides of the frame 10, and a recess is provided on each support leg 50, wherein when the frame 10 is connected with the support leg 50, the frame 10 is inserted into the recess along the assembly direction of the first plate body 20 and the second plate body 30, and the connection between the support leg 50 and the frame 10 is completed by the fastener, and the connection structure between the support leg 50 and the frame 10 is hidden at the bottom of the frame 10.

[0072] Preferably, the writable support further comprises at least one functional plate 100, and the functional plate 100 comprises a storage platform 110 and a connecting plate 120, the connecting plate 120 is clamped between the frame 10 and the support leg 50, and a plug hole 130 matched with the plug-in part 51 is arranged on the connecting plate 120, and the plug-in part 51 of the support leg 50 is connected with the plug-in groove 14 after passing through the plug hole 130.

[0073] In this embodiment, by arranging the functional plate 100, the tools used in cooperation with the writable support can be placed, avoiding loss and facilitating user use.

[0074] In other embodiments, the functional plate 100 can have no storage platform and be used only as a decorative plate, and the functional plate 100 is clamped between the frame 10 and the support leg 50 to shield the connection structure in the second connection area 13.

[0075] It should be noted that in the present application, the description of "first", "second", "one" and the like are only used for the purpose of description and can not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited. The terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0076] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the scope of protection required by the present application.

[0077] The specific embodiments described herein are merely illustrative of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A writable support, characterized in that, The frame (10) is composed of a plurality of frame strips (11), and a first connecting area (12) is arranged in a limited area of the frame (10). The first plate body (20) and the second plate body (30) are arranged in the first connecting area (12), the first plate body (20) and the second plate body (30) are oppositely arranged and connected to each other, the first plate body (20) is connected to the frame (10) defining the first connecting area (12), a connecting structure is arranged between the first plate body (20) and the second plate body (30), and the connecting structure is hidden in a gap between the first plate body (20) and the second plate body (30). The support pipe (40) supports the first plate body (20) and the second plate body (30) at the bottom and clamps the first plate body (20) and the second plate body (30) between the support pipe (40) and the frame (10). The connecting structure includes a first clamping part arranged on the first plate body (20) and a second clamping part arranged on the second plate body (30), and the second clamping part is clamped on the first clamping part from bottom to top to complete the connection between the first plate body (20) and the second plate body (30).

2. A writable support according to claim 1, characterized in that The first clamping part includes a first clamping piece (21) connected to the first plate body (20), and an insertion channel (22) is formed between the first clamping piece (21) and the first plate body (20) from top to bottom; the second clamping part includes a second clamping piece (31), one end of the second clamping piece (31) is connected to the second plate body (30), and the other end is kept a distance from the second plate body (30) to form an open gap, and is inserted into the insertion channel (22) from bottom to top.

3. A writable support according to claim 2, characterized in that A retaining piece (60) is arranged in the gap between the first plate body (20) and the second plate body (30), wherein the retaining piece (60) is connected to at least one of the frame (10), the first plate body (20) and the second plate body (30).

4. The writable support of claim 1, wherein, The retaining piece (60) is provided with a groove (61) along the axis direction of the retaining piece (60), and a mounting hole (62) is arranged on the groove bottom of the groove (61), when the retaining piece (60) is installed, a fastener is connected to at least one of the frame (10), the first plate body (20) and the second plate body (30) through the mounting hole (62) from the groove opening of the groove (61), wherein the end of the fastener is hidden in the groove (61).

5. A writable support according to claim 4, characterized in that ​ 6. A writable support according to any one of claims 1 to 3, characterized in that, A fixing plate (70) is arranged along at least two side edges of the first connecting area (12), and one end of the fixing plate (70) is connected to the frame (10), and the other end is a free end (71), wherein the first plate body (20) and the second plate body (30) are located on the front and back sides of the free end (71), and the connection between the free end (71) and the first plate body (20) is completed by a fastener in sequence, and the second plate body (30) is clamped on the first plate body (20).

7. A writable support according to any one of claims 1 to 3, characterized in that, The frame (10) is a closed frame formed by splicing a plurality of frame strips (11) end to end, and a second connecting area (13) is further arranged in the closed frame (10), and the first connecting area (12) and the second connecting area (13) are arranged in the closed frame (10) in an up-down distribution. A connecting piece (90) is arranged at both ends of the support pipe (40) in the length direction, the connecting piece (90) is located in the second connecting area (13), and the connecting piece (90) is connected to the frame (10) and supported at the bottom of the support pipe (40).

8. A writable support according to claim 7, characterized in that Further comprising a support leg (50), the support leg (50) is provided with a plug-in part (51) and a support plate (52), the frame (10) and / or the connecting piece (90) is provided with a slot (14), the plug-in part (51) is plugged with the slot (14), and the support plate (52) is connected to the bottom of the frame (10). When the plug-in part (51) is plugged with the slot (14), the support leg (50) is pushed upward, the support plate (52) can be attached to the frame (10).

9. A writable support according to claim 7, characterized in that, The bottom of the support pipe (40) is provided with a support plate (80), and the support plate (80) is located in the second connecting area (13), one end of the support plate (80) is connected to the support pipe (40), and the other end is connected to the connecting piece (90).

10. A writable support according to claim 8, characterized in that Further comprising at least one functional plate (100), and the functional plate (100) is provided with a connecting plate (120), the connecting plate (120) is clamped between the frame (10) and the support leg (50), and a plug hole (130) matched with the plug-in part (51) is arranged on the connecting plate (120), and the plug-in part (51) of the support leg (50) is connected with the slot (14) after passing through the plug hole (130).

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