Communication cabinet side plate assembly and communication cabinet thereof

Abstract

The invention provides a communication cabinet side plate assembly and a communication cabinet thereof, and belongs to the technical field of machinery. The problem of poor stability in the prior art is solved. The communication cabinet side plate assembly is located between a fixed plate and a movable plate, the side plate assembly comprises a first buckling piece and a second buckling piece, the inner end of the first buckling piece is connected to an inner cavity of the movable plate, the outer end of the first buckling piece extends out of the movable plate, the second buckling piece is fixedly connected to the edge of the fixed plate, and the first buckling piece is connected to the second buckling piece in a buckling mode. The side plate assembly is high in stability.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to a communication cabinet side panel component and a communication cabinet thereof. Background Art

[0002] Communication cabinets, also known as network cabinets, server cabinets or IT cabinets, are special cabinets used to store and manage telecommunications and information technology equipment such as communication equipment, servers, network switches, routers, patch panels, etc. It not only provides physical protection, but also ensures the heat dissipation, wiring management and maintenance convenience of the equipment.

[0003] The cabinet body of the existing communication cabinet usually includes a bracket and a plurality of flat plate bodies, and the plate bodies are fixedly connected to the bracket to form a cabinet body with a cavity inside.

[0004] The plate and the bracket are made of metal materials, and the two are connected by welding or fasteners. Although this connection method has high connection stability, the assembly and disassembly of the entire cabinet is very cumbersome.

[0005] The Chinese patent publication number CN210899994U discloses an electrical cabinet brow and an electrical cabinet. The electrical cabinet brow is configured to be installed on the electrical cabinet, and a spring clip is provided on the side of the electrical cabinet brow facing the electrical cabinet. The spring clip has a first spring leaf and a second spring leaf connected to each other, and the plug on the electrical cabinet can be clamped between the first spring leaf and the second spring leaf, so that the electrical cabinet brow can be detachably installed on the electrical cabinet. By inserting the plug between the first spring leaf and the second spring leaf, the electrical cabinet brow is firmly installed on the electrical cabinet; the electrical cabinet brow is pulled outward along the extension direction of the plug, and the electrical cabinet brow can be removed by separating the first spring leaf and the second spring leaf from the plug.

[0006] It can be seen that the electrical cabinet of the above patent is also composed of a cabinet body and a plurality of plate bodies, and the same problem of cumbersome loading and unloading of the entire cabinet body exists.

[0007] Secondly, when the communication cabinet has a secondary side cabinet and the communication cabinet and the side cabinet are lifted simultaneously, the side cabinet is subjected to uneven force, resulting in damage to the hinges. Summary of the invention

[0008] The purpose of the present invention is to provide a communication cabinet side panel assembly and a communication cabinet which is compact and easy to load and unload, in view of the above problems existing in the prior art.

[0009] The purpose of the present invention can be achieved by the following technical solutions: A communication cabinet side panel assembly, the communication cabinet comprises a bracket, a fixed plate and a movable plate, the fixed plate is fixedly connected to the bracket, the bracket is used to support and position the fixed plate, the fixed plate forms a semi-finished product with a cavity inside and an opening on the side, the movable plate is connected to the opening on the side of the semi-finished product and forms a cabinet body with a cavity inside, the movable plate has a cavity inside, the side panel assembly is located between the fixed plate and the movable plate, the side panel assembly comprises a first fastener and a second fastener, the inner end of the first fastener is connected to the inner cavity of the movable plate and the outer end of the first fastener extends out of the movable plate, the second fastener is fixedly connected to the edge of the fixed plate, and the first fastener is fastened and connected to the second fastener.

[0010] In the above-mentioned communication cabinet side panel assembly, the fastening component includes a main body, a baffle, a pressing plate and an embedded tongue. The above-mentioned main body is in the shape of a long block. The above-mentioned baffle is fixedly connected to the main body and the edges on both sides of the baffle extend out of the main body. The above-mentioned pressing plate is fixedly connected at the end of the main body and the pressing plate is adjacent to the baffle. The above-mentioned embedded tongue is fixedly connected at the end of the main body.

[0011] In the above-mentioned communication cabinet side panel assembly, the pressing plate includes pressing plate 1 and pressing plate 2, and the above-mentioned pressing plate 1 and pressing plate 2 are respectively located at the two ends of the main body, and a snap-fit ​​gap 1 is formed between the pressing plate 1 and the baffle plate, and a snap-fit ​​gap 2 is formed between the above-mentioned pressing plate 2 and the baffle plate.

[0012] In the above-mentioned communication cabinet side panel assembly, the movable panel includes an outer panel and an inner panel, the outer panel has a through positioning hole, the main body is located between the outer panel and the inner panel, the pressing plate 1 and the baffle are tightly pressed on both sides of the outer panel, and the pressing plate 2 and the baffle are tightly pressed on both sides of the outer panel.

[0013] In the above-mentioned communication cabinet side plate assembly, the number of the pressing plates 1 is two, and the two pressing plates 1 are symmetrically arranged on both sides of the body.

[0014] In the above-mentioned communication cabinet side panel assembly, the number of the second pressing plate is one, and along the projection of the length direction of the main body, the second pressing plate is located between two first pressing plates.

[0015] In the above-mentioned communication cabinet side panel assembly, the body, the baffle, the pressing plate and the embedded tongue are an integrated structure.

[0016] In the above-mentioned communication cabinet side plate assembly, the buckle member 1 has a lever hole recessed from the blocking piece into the body.

[0017] In the above-mentioned communication cabinet side panel assembly, the dial hole has a step-shaped pushing portion, and the pushing portion has a direction mark.

[0018] In the above-mentioned communication cabinet side panel assembly, the interior of the embedded tongue is a cavity.

[0019] In the above-mentioned communication cabinet side panel assembly, the second fastener includes a plate-shaped reinforcement plate, which includes a reinforcement portion in contact with the fixed plate surface and a folded contact portion located at the edge of the reinforcement portion, and the contact portion has a lock hole that penetrates and matches the embedded tongue.

[0020] The present application also provides a communication cabinet, comprising the communication cabinet side panel assembly, and a sub-cabinet hinged on the side of the cabinet body, one side of the sub-cabinet and one side of the cabinet body are hinged by a hinge, and the other side of the sub-cabinet and the cabinet body are locked or unlocked by a lock assembly, and a hinge counter-balancing structure is also provided on the side where the sub-cabinet and the cabinet body are locked and connected by the lock assembly, which can stop the sub-cabinet when the cabinet body and the sub-cabinet are lifted together, at least a part of the hinge counter-balancing structure is provided on the sub-cabinet, and the remaining part is provided on the cabinet body.

[0021] Compared with the prior art, the side panel assembly has fastener 1 stably connected to the movable panel, and fastener 2 stably connected to the fixed panel. The fastener 1 and fastener 2 can facilitate loading and unloading between the movable panel and the fixed panel, thereby not only having a relatively high connection stability, but also being easy to load and unload.

[0022] At the same time, the inner end of fastener one can not only be conveniently installed in the movable plate, but fastener one can also be conveniently and stably moved under the action of external force. Therefore, fastener one and fastener two are not only convenient to connect, but fastener one hidden in the movable plate can also appropriately improve its structural compactness, and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of a communication cabinet having the side panel assembly.

[0024] Figure 2 The present invention is a schematic diagram of the transverse cross-sectional structure of a communication cabinet having the side panel assembly.

[0025] Figure 3 yes Figure 2 Schematic diagram of the local structure at part A in the middle.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the fastening component 1.

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the fastening member in another direction.

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of the fastening part.

[0029] Figure 7 This is a three-dimensional structural diagram of the communication cabinet from another perspective.

[0030] Figure 8yes Figure 7 Schematic diagram of the three-dimensional structure after removing the auxiliary cabinet.

[0031] In the figure, 1, bracket; 2, fixed plate; 3, movable plate; 3a, outer plate; 3a1, positioning hole; 3b, inner plate; 4, main body; 5, baffle; 6, pressing plate 1; 7, pressing plate 2; 8, embedded tongue; 9, dial hole; 9a, pushing part; 9b, direction mark; 10, reinforcement plate; 10a, reinforcement part; 10b, contact part; 10b1, lock hole; 11, sub-cabinet; 12, hinge; 13, lock assembly; 14, hinge connecting plate; 15, stop plate; 16, horizontal counterbalancing tongue; 17, horizontal through hole; 18, tapered rubber pin; 19, alignment hole. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly mounted on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0035] Embodiment 1, as Figure 1 and Figure 2 and Figure 3 As shown, the communication cabinet includes a bracket 1, a fixed plate 2 and a movable plate 3. The fixed plate 2 is fixedly connected to the bracket 1, and the bracket 1 is used to support and position the fixed plate 2. The fixed plate 2 forms a semi-finished product with a cavity inside and an opening on the side. The movable plate 3 is connected to the side opening of the semi-finished product and forms a cabinet body with a cavity inside. The movable plate 3 has a cavity inside.

[0036] The side panel assembly of the communication cabinet is located between the fixed plate 2 and the movable plate 3, and the side panel assembly includes a fastener 1 and a fastener 2. The inner end of the fastener 1 is connected to the inner cavity of the movable plate 3 and the outer end of the fastener 1 extends out of the movable plate 3. The fastener is fixedly connected to the edge of the fixed plate 2, and the fastener 1 is fastened to the fastener 2.

[0037] The bracket 1 is used to support the fixed plate 2. Under the action of the side plate assembly, the movable plate 3 can be stably connected to the fixed plate 2. At the same time, under the action of the side plate assembly, the movable plate 3 and the fixed plate 2 can be easily assembled and unassembled.

[0038] Specifically, an inner end of the fastener is fixedly connected in the inner cavity of the movable plate 3, and an outer end of the fastener extends out of the movable plate 3. After the outer end of the fastener is fastened and connected with the fastener 2 on the fixed plate 2, the movable plate 3 and the fixed plate 2 can be quickly positioned and connected.

[0039] Of course, a fastening unit is formed between the first fastening member and the second fastening member. In order to improve the connection stability between the movable plate 3 and the fixed plate 2, the number of the above-mentioned fastening units is multiple.

[0040] In this embodiment, there are two buckling units, one side of the movable plate 3 and the fixed plate 2 have two buckling units adjacent to each other, and the other side of the movable plate 3 and the fixed plate 2 have another two buckling units adjacent to each other.

[0041] like Figure 4 and Figure 5 and Figure 6 As shown, the fastener 1 includes a main body 4, a baffle 5, a pressing piece and an embedded tongue 8, the main body 4 is in the shape of a long block, the baffle 5 is fixedly connected to the main body 4 and the edges on both sides of the baffle 5 extend out of the main body 4, the pressing piece is fixedly connected at the end of the main body 4 and the pressing piece is adjacent to the baffle 5, and the embedded tongue 8 is fixedly connected at the end of the main body 4.

[0042] The pressing sheet includes a pressing sheet 1 6 and a pressing sheet 2 7 , which are respectively located at two ends of the body 4 , a snap-fitting gap 1 is formed between the pressing sheet 1 6 and the baffle 5 , and a snap-fitting gap 2 is formed between the pressing sheet 2 7 and the baffle 5 .

[0043] The movable plate 3 includes an outer plate 3a and an inner plate 3b, the outer plate 3a has a penetrating positioning hole 3a1, the main body 4 is located between the outer plate 3a and the inner plate 3b, the pressing plate 1 6 and the blocking plate 5 are pressed tightly on both sides of the outer plate 3a, and the pressing plate 2 7 and the blocking plate 5 are pressed tightly on both sides of the outer plate 3a.

[0044] The body 4 is embedded between the outer plate 3a and the inner plate 3b through the positioning hole 3a1. Since the size of the baffle 5 is larger than the size of the positioning hole 3a1, the baffle 5 cannot enter between the outer plate 3a and the inner plate 3b through the positioning hole 3a1.

[0045] The pressing piece 1 6 and the blocking piece 5 are pressed tightly on both sides of the outer plate 3a, and the pressing piece 2 7 and the blocking piece 5 are pressed tightly on both sides of the outer plate 3a. Such a structure can make the inner end of the entire fastening piece 1 stably connected to the edge of the movable plate 3.

[0046] Of course, the embedded tongue 8 extends out of the edge of the movable plate 3, that is, an outer end of the fastening member extends out of the movable plate 3.

[0047] The number of the pressing plates 6 is two, and the two pressing plates 6 are symmetrically arranged on both sides of the body 4.

[0048] The number of the second pressing plate 7 is one, and along the projection of the length direction of the main body 4, the second pressing plate 7 is located between the two first pressing plates 6.

[0049] Such a structure can simplify the structure of the fastening member 1 as much as possible while ensuring that the inner end of the fastening member 1 is stably connected to the movable plate 3.

[0050] The body 4, the blocking piece 5, the pressing piece and the embedded tongue 8 are an integrated structure.

[0051] The entire fastening member is made of plastic material and is an integrated structure.

[0052] The buckle member has a shifting hole 9 which is recessed from the blocking piece 5 into the body 4 .

[0053] The dial hole 9 has a step-shaped pushing portion 9a, and the pushing portion 9a has a direction mark 9b.

[0054] The pushing portion 9a in the dial hole 9 enables the operator to conveniently push the fastening member 1. After the fastening member 1 moves, the fastening member 1 can stably switch between the fastening connection and separation states between the fastening member 1 and the fastening member 2.

[0055] Since the fastening member 1 is in close contact with the movable plate 3, there is an appropriate friction resistance between the fastening member 1 and the movable plate 3, and the fastening member 1 will not loosen under normal circumstances. Only when the operator's finger reaches into the dial hole 9 and pushes the pushing part 9a can the fastening member 1 be easily driven to move.

[0056] Of course, the direction mark 9b on the pushing portion 9a can intuitively inform the operator which direction is the opening direction. In this embodiment, the direction mark 9b is a triangular arrow on the pushing portion 9a.

[0057] The length of the positioning hole 3a1 is greater than the length of the body 4, so the positioning hole 3a1 has a limiting effect. Although the buckle member 1 can move, the moving stroke of the buckle member 1 is limited.

[0058] The interior of the embedded tongue 8 is a cavity.

[0059] Since the entire fastening piece is made of plastic material, the embedded tongue 8 of the cavity has appropriate elasticity, ensuring that the embedded tongue 8 can be smoothly and stably inserted into the two places of the fastening piece.

[0060] The second fastener comprises a plate-shaped reinforcing plate 10, which comprises a reinforcing portion 10a in surface contact with the fixing plate 2 and a folded contact portion 10b at the edge of the reinforcing portion 10a, wherein the contact portion 10b has a locking hole 10b1 penetrating therethrough and matching with the embedded tongue 8.

[0061] The reinforcement portion 10 a not only stably connects the reinforcement plate 10 to the fixing plate 2 , but also improves the strength of the reinforcement plate 10 .

[0062] The arrangement of the contact portion 10 b enables the locking hole 10 b 1 thereon to be stably aligned with the inserting tongue 8 .

[0063] Since the side panel assembly has fastener 1 stably connected to the movable panel and fastener 2 stably connected to the fixed panel, the movable panel and the fixed panel can be conveniently loaded and unloaded under the action of fastener 1 and fastener 2, which not only has high connection stability but also is convenient for loading and unloading.

[0064] At the same time, the inner end of fastener one can not only be conveniently installed in the movable plate, but fastener one can also be conveniently and stably moved under the action of external force. Therefore, fastener one and fastener two are not only convenient to connect, but fastener one hidden in the movable plate can also appropriately improve its structural compactness, and has high practical value.

[0065] Embodiment 2, as Figure 7 and Figure 8 As shown, in this embodiment, the communication cabinet includes the communication cabinet side panel assembly of embodiment 1. A sub-cabinet 11 is also hinged on the side of the cabinet body, one side of the sub-cabinet 11 and one side of the cabinet body are hinged by a hinge 12, and the other side of the sub-cabinet 11 and the cabinet body are locked or unlocked by a lock assembly 13, and the lock assembly 13 is commercially available. A hinge counter-balancing structure is also provided on the side where the sub-cabinet 11 and the cabinet body are locked and connected by the lock assembly 13, which can stop the sub-cabinet 11 when the cabinet body and the sub-cabinet 11 are lifted together, at least a part of the hinge counter-balancing structure is provided on the sub-cabinet 11, and the remaining part is provided on the cabinet body.

[0066] Secondly, two hinge connecting plates 14 are provided on one vertical side of the auxiliary cabinet 11, there are two hinges 12 and one hinge 12 corresponds to one hinge connecting plate 14, at least part of the hinge 12 is fixed to the hinge connecting plate 14, and the rest of the hinge 12 is fixed to the cabinet body. And two stop plates 15 are provided on the other vertical side of the auxiliary cabinet 11, and the one vertical side and the other vertical side are relatively distributed.

[0067] The hinge connecting plate 14 and the stop plate 15 are both L-shaped or right-angled to improve their own strength and further improve the structural strength of the corner of the auxiliary cabinet 11. That is, the hinge connecting plate 14 and the stop plate 15 are fixed to the inner right angle of the auxiliary cabinet 11 respectively.

[0068] In addition, the hinge counterbalancing structure includes a transverse counterbalancing tongue 16 arranged on the inner side of the sub-cabinet 11 or the stop plate 15. There are two transverse counterbalancing tongues 16 and they are distributed one-to-one with the hinges 12. The cabinet body is provided with transverse through holes 17 for the transverse counterbalancing tongues 16 to enter one by one. The distribution direction of the transverse counterbalancing tongues 16 can be understood as the X direction, the distribution direction of the hinge connecting plate 14 can be understood as the Y direction, and the distribution direction of the stop plate 15 can be understood as the Y direction.

[0069] In this state, when the lock assembly 13 is in a locked state, the two transverse counterbalancing tongues 16 extend into the transverse through holes 17 one by one, and when lifting occurs, the transverse counterbalancing tongues 16 can protect the hinges 12 on the sub-cabinet 11 to ensure that the hinges 12 can open and close smoothly during subsequent use.

[0070] The transverse counterbalancing tongue 16 is a metal plate, which is attached to the inner wall of one side of the stop plate 15. The length of the transverse counterbalancing tongue 16 fixed on the stop plate 15 is longer than the length of the transverse counterbalancing tongue 16 extending into the transverse through hole 17, so as to ensure that the transverse counterbalancing tongue 16 has high load performance.

[0071] In addition, an alignment structure is provided between the sub-cabinet 11 and the cabinet body, and the alignment structure enables the lock assembly 13 and the hinge counterbalance structure to cooperate with each other at the set position, thereby ensuring the alignment accuracy of the sub-cabinet 11 after opening and closing. Specifically, the alignment structure includes a tapered rubber pin 18 provided on the sub-cabinet 11, and an alignment hole 19 for inserting the tapered rubber pin 18 is provided on the counter. Preferably, there are two tapered rubber pins 18 and two alignment holes 19 in this embodiment, and the tapered rubber pins 18 and the alignment holes 19 are matched one by one. At the same time, the length of the tapered rubber pin 18 inserted into the alignment hole 19 is longer than the length of the transverse counterbalance tongue 16 extending into the transverse through hole 17, so as to play a role of pre-alignment.

[0072] Finally, the alignment structure and the hinge counterbalancing structure are arranged on the same side, such as between one side of the cabinet body and the side of the auxiliary cabinet 11 corresponding to the one side of the cabinet body.

[0073] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection claimed by the present invention.

Claims

1. A communication cabinet side panel assembly, the communication cabinet comprising a bracket (1), a fixed plate (2) and a movable plate (3), the fixed plate (2) being fixedly connected to the bracket (1), the bracket (1) being used to support and position the fixed plate (2), the fixed plate (2) forming a semi-finished product with a cavity inside and an opening on the side, the movable plate (3) being connected to the opening on the side of the semi-finished product and forming a cabinet body with a cavity inside, characterized in that: The movable plate (3) has a hollow interior. The side plate assembly is located between the fixed plate (2) and the movable plate (3). The side plate assembly comprises a first fastener and a second fastener. The inner end of the first fastener is connected to the inner cavity of the movable plate (3) and the outer end of the first fastener extends out of the movable plate (3). The second fastener is fixedly connected to the edge of the fixed plate (2). The first fastener is fastened to the second fastener.

2. The communication cabinet side panel assembly according to claim 1, characterized in that: The fastening member 1 comprises a body (4), a baffle (5), a pressing piece and an embedded tongue (8); the body (4) is in the shape of a long block; the baffle (5) is fixedly connected to the body (4) and edges on both sides of the baffle (5) extend out of the body (4); the pressing piece is fixedly connected to the end of the body (4) and the pressing piece is adjacent to the baffle (5); and the embedded tongue (8) is fixedly connected to the end of the body (4).

3. The communication cabinet side panel assembly according to claim 2, characterized in that: The pressing sheet comprises a pressing sheet 1 (6) and a pressing sheet 2 (7), wherein the pressing sheet 1 (6) and the pressing sheet 2 (7) are respectively located at two ends of the body (4), a snap-fitting gap 1 is formed between the pressing sheet 1 (6) and the baffle (5), and a snap-fitting gap 2 is formed between the pressing sheet 2 (7) and the baffle (5).

4. The communication cabinet side panel assembly according to claim 3, characterized in that: The movable plate (3) comprises an outer plate (3a) and an inner plate (3b), the outer plate (3a) having a through positioning hole (3a1), the body (4) being located between the outer plate (3a) and the inner plate (3b), the pressing plate 1 (6) and the baffle (5) being pressed tightly on both sides of the outer plate (3a), and the pressing plate 2 (7) and the baffle (5) being pressed tightly on both sides of the outer plate (3a).

5. The communication cabinet side panel assembly according to claim 4, characterized in that: The number of the pressing plates (6) is two, and the two pressing plates (6) are symmetrically arranged on both sides of the body (4).

6. The communication cabinet side panel assembly according to claim 5, characterized in that: The number of the second pressing plate (7) is one, and in the projection along the length direction of the body (4), the second pressing plate (7) is located between the two first pressing plates (6).

7. The communication cabinet side panel assembly according to claim 6, characterized in that: The body (4), the blocking piece (5), the pressing piece and the embedded tongue (8) are an integrated structure.

8. The communication cabinet side panel assembly according to claim 7, characterized in that: The buckle piece has a lever hole (9) which is recessed from the blocking piece (5) into the body (4).

9. The communication cabinet side panel assembly according to claim 8, characterized in that: The second fastening member comprises a plate-shaped reinforcement plate (10), the reinforcement plate (10) comprising a reinforcement portion (10a) in surface contact with the fixing plate (2) and a folded contact portion (10b) located at the edge of the reinforcement portion (10a), the contact portion (10b) having a lock hole (10b1) penetrating therethrough and matching the embedded tongue (8).

10. A communication cabinet, characterized in that: The communication cabinet comprises a side panel assembly as claimed in any one of claims 1 to 9, and a sub-cabinet (11) is hingedly connected to the side of the cabinet, one side of the sub-cabinet (11) is hingedly connected to one side of the cabinet by a hinge (12), and the other side of the sub-cabinet (11) and the cabinet are locked or unlocked by a lock assembly (13), and a hinge counter-balancing structure is also provided on the side where the sub-cabinet (11) and the cabinet are locked and connected by the lock assembly (13), which can stop the sub-cabinet (11) when the cabinet and the sub-cabinet (11) are lifted together, and at least a part of the hinge counter-balancing structure is provided on the sub-cabinet (11), and the remaining part is provided on the cabinet.

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