Circuit box assembly

Abstract

The utility model discloses a circuit box assembly, comprising a housing provided with at least one accommodating space, the front end of the accommodating space along a first direction is provided with an opening and a fixing part, and the rear end of the accommodating space is internally provided with a positioning part; the at least one circuit box comprises a box body for accommodating an electrical assembly, the box body can slide into or retreat from the accommodating space through the opening, a butt joint part is arranged at the front end of the box body along the first direction, and an abutting part is arranged at the rear end of the box body along the first direction; when the box body slides into the containing space, the abutting portion of the box body and the positioning portion of the shell are matched with each other to limit the rear end of the box body in the first direction, and the butt joint portion of the box body is detachably connected with the fixing portion of the shell. Therefore, the box body is fixed in the accommodating space. The circuit box assembly is easy to produce and assemble and convenient to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to a circuit box component. Background Art

[0002] In the existing breast biopsy system, the circuit box is directly fixed to the main unit base plate by screws, and the main unit housing is only designed with a maintenance window on the back. This construction method causes obvious inconvenience in the installation and removal of the circuit box, especially when after-sales maintenance or replacement of the circuit box is required. Since the screws on the inside of the housing are difficult to operate, maintenance personnel are prone to misoperation when tightening the screws, and even cause the screws to fall into the main unit housing and be difficult to remove. This not only affects the normal use of the equipment, but also increases the difficulty of maintenance. In addition, when reinstalling the circuit box, the problem of installation difficulty is also faced. Utility Model Content

[0003] Based on this, it is necessary to address the inconvenience of installing and maintaining the circuit box of the existing breast biopsy system. The utility model provides a circuit box assembly, which can simplify the installation and disassembly process of the circuit box, avoid misoperation and maintenance inconvenience caused by difficult screw operation when repairing or replacing the circuit box, thereby improving the maintenance efficiency and use reliability of the equipment.

[0004] A circuit box assembly, comprising:

[0005] The housing is provided with at least one accommodating space, wherein the front end of the accommodating space along the first direction is provided with an opening and a fixing portion, the fixing portion is fixed on the housing, and a positioning portion is provided in the accommodating space;

[0006] At least one circuit box, comprising a box body for accommodating electrical components, the box body being able to slide into or out of the accommodating space through the opening, the box body being provided with a docking portion at a front end along a first direction and abutting portion at a rear end;

[0007] When the box body is slid into the accommodating space, the abutting portion of the box body and the positioning portion of the shell abut against each other, and the docking portion of the box body is detachably connected to the fixing portion of the shell to fix the box body in the accommodating space.

[0008] In one embodiment, the positioning portion is provided with a positioning slope, and the supporting portion is provided with a supporting slope. The angles formed by the positioning slope and the supporting slope with the first direction are both acute angles, and the angles are equal in size; when the box body is slid into the accommodating space, the supporting slope contacts the supporting slope.

[0009] In one of the embodiments, fixing holes are provided on the fixing portion of the shell and the docking portion of the box body, the fixing portion and the docking portion are detachably connected by fasteners screwed into the fixing holes, and the fixing portion is arranged near the edge of the opening.

[0010] In one of the embodiments, a handle is provided on the front end of the box along the first direction.

[0011] In one embodiment, the shell has a first accommodating space and a second accommodating space, the first accommodating space is provided with a first fixing portion at the front end along the first direction, and a first positioning portion is provided in the rear end, the second accommodating space is located above the first accommodating space, the second accommodating space is provided with a second fixing portion at the front end along the first direction, and a second positioning portion is provided in the rear end; the at least one circuit box includes a first circuit box and a second circuit box, the first circuit box includes a first box body, the first box body is accommodated in the first accommodating space, the second circuit box includes a second box body, the second box body is accommodated in the second accommodating space, the first box body is provided with a first docking portion at the front end along the first direction, and a first abutting portion at the rear end, the second box body is provided with a second docking portion at the front end along the first direction, and a second abutting portion at the rear end.

[0012] In one embodiment, the shell includes a mounting base plate, a first side plate, a second side plate, a rear side plate and a top plate, the first side plate and the second side plate are arranged relative to each other in a second direction, the second direction is perpendicular to the first direction in a horizontal plane, the lower ends of the first side plate and the second side plate are fixed to the mounting base plate, the rear side plate is connected between the rear ends of the first side plate and the second side plate along the first direction, the first accommodating space is formed between the first side plate, the second side plate, the rear side plate and the mounting base plate, the top plate is connected between the upper ends of the first side plate and the second side plate, the first side plate and the second side plate respectively have a first protrusion and a second protrusion protruding from the top plate, and the second accommodating space is formed between the first protrusion and the second protrusion and the top plate.

[0013] In one embodiment, the first fixing portion includes at least one first limiting boss arranged on the inner side wall corresponding to the front end of the first accommodating space along the first direction, and the first docking portion includes at least one second limiting boss arranged on the front end of the first box body along the first direction, and the first limiting boss and the second limiting boss are both provided with fixing holes, and the first box body is provided with at least one notch extending along the first direction to avoid the first limiting boss; when the first box body is slid into the first accommodating space, the first limiting boss and the second limiting boss are in contact with each other, and are fixed by screwing fasteners into the fixing holes on the first limiting boss and the second limiting boss.

[0014] In one embodiment, it includes two first limiting bosses and two second limiting bosses, the first side panel and the second side panel are respectively provided with a first notch and a second notch at the lower corners of the front end along the first direction, and the two first limiting bosses are respectively fixed on the mounting base plate at positions corresponding to the first notch and the second notch; the first box body is respectively provided with a first notch and a second notch on the lower sides at both ends along the second direction, and the two second limiting bosses are respectively fixed on the first box body at positions corresponding to the first notch and the second notch.

[0015] In one of the embodiments, the first fixing portion includes an edge portion arranged on the front end of the mounting base along the first direction, the first docking portion includes at least one mounting ear arranged on the front end of the first box body along the first direction, and fixing holes are provided on the edge portion and the mounting ear. When the first box body is slid into the first accommodating space, the mounting ear and the edge portion are in contact, and fasteners are screwed into the mounting ear and the fixing holes on the edge portion to achieve fixation.

[0016] In one of the embodiments, the second fixing portion includes at least one groove arranged on the front end of the top plate along the first direction, and the second docking portion includes at least one limiting lug arranged on the front end of the second box body along the first direction, and fixing holes are provided on the bottom of the groove and the limiting lug. When the second box body is slid into the second accommodating space, the limiting lug is inserted into the corresponding groove and fixed by screwing a fastener into the bottom of the groove and the fixing hole on the limiting lug.

[0017] In the above-mentioned circuit box assembly, the circuit box at one end inside the accommodating space is precisely positioned by the cooperation between the positioning part and the abutting part, while the circuit box near the open end of the accommodating space is detachably connected by the fixing part and the docking part. This design allows the circuit box to be easily installed and fixed from the outside of the accommodating space. The connection mechanism design of this circuit box assembly is simple and efficient, successfully solving the difficulties existing in the installation and disassembly process of traditional circuit boxes, and significantly reducing the cost of production and maintenance. Its easy assembly feature not only simplifies the production process, but also greatly facilitates the maintenance and replacement work of after-sales service personnel, achieving efficient and convenient maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of a circuit box assembly in one embodiment of the utility model;

[0019] Figure 2 for Figure 1 A top view of

[0020] Figure 3 for Figure 1 Left view of

[0021] Figure 4 for Figure 1 Stereoscopic image of

[0022] Figure 5 for Figure 1 Exploded diagram of

[0023] Figure 6 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0024] Figure 7 For along Figure 2 Sectional view along line AA;

[0025] Figure 8 for Figure 7 A partial enlarged schematic diagram of point C in the middle;

[0026] Fig. 9 for Figure 5 A partial enlarged schematic diagram of point D in the middle;

[0027] Fig.10 for Figure 5 A partial enlarged schematic diagram of point E in the middle.

[0028] Description of reference numerals: 10, housing; 101, first accommodating space; 102, second accommodating space; 11, mounting base; 111, edge portion; 12, first side plate; 121, first protrusion; 122, first notch A; 13, second side plate; 131, second protrusion; 14, top plate; 141, groove; 15, rear side plate; 16, first positioning block; 161, first positioning inclined surface; 17, first limiting boss; 18, second positioning block; 181, second positioning inclined surface;

[0029] 20. first circuit box; 21. first box body; 211. first front cover plate; 211a. first notch B; 212. first rear cover plate; 213. connecting bottom plate; 213a. mounting lug; 214. first fixing plate; 215. first handle; 216. abutment block; 216a. first abutment slope; 217. second limiting boss; 218. notch; 22. electrical components;

[0030] 30. second circuit box; 31. second box body; 311. second front cover plate; 312. second rear cover plate; 313. top cover plate; 314. left side plate; 315. second handle; 316. second positioning block B; 316a. second abutting inclined surface; 317. limiting lug;

[0031] 41. First fastener; 42. Second fastener; 43. Third fastener. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the specific details described below are only part of the embodiments of the utility model, and the utility model can also be implemented in many other embodiments different from those described here. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the utility model.

[0033] In this document, when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the clarity and convenience of expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed by the utility model.

[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.

[0035] See also Figure 1 and Figure 5 The circuit box assembly in one embodiment of the utility model includes a housing 10 and at least one circuit box, and the housing 10 is provided with at least one accommodation space. In this embodiment, the number of accommodation spaces is two, namely a first accommodation space 101 and a second accommodation space 102, and the first accommodation space 101 and the second accommodation space 102 are arranged along a first direction ( Figure 4 The front end is open in the direction indicated by the arrow "X" in the middle, and the first accommodating space 101 and the second accommodating space 102 are respectively provided with a first positioning portion and a second positioning portion in the rear ends along the first direction, and a first fixing portion and a second fixing portion are respectively provided at the front ends.

[0036] In this embodiment, there are two circuit boxes, namely, a first circuit box 20 and a second circuit box 30. The first circuit box 20 includes a first box body 21 and an electrical component 22 contained in the first box body 21. The first box body 21 can slide into or out of the first accommodating space 101 through the opening of the first accommodating space 101. The first box body 21 is provided with a first abutting portion at the rear end along the first direction, and a first docking portion at the front end. When the first circuit box 20 is slid into the first accommodating space 101, the first abutting portion of the first box body 21 and the first positioning portion of the housing 10 cooperate with each other to limit the rear end of the first box body 21 along the first direction. At the same time, the first docking portion of the first box body 21 and the first fixing portion of the housing 10 can be detachably connected to fix the first box body 21 in the first accommodating space 101.

[0037] Similarly, the second circuit box 30 includes a second box body 31 and an electrical component (not shown in the figure) contained in the second box body 31. The second box body 31 can slide into or out of the second accommodating space 102 through the opening of the second accommodating space 102. The second box body 31 is provided with a second abutment portion at the rear end along the first direction, and a second docking portion at the front end. When the second circuit box 30 is slid into the second accommodating space 102, the second abutment portion of the second box body 31 and the second positioning portion of the housing 10 cooperate with each other to limit the rear end of the second box body 31 along the first direction. At the same time, the second docking portion of the second box body 31 and the second fixing portion of the housing 10 can be detachably connected to fix the second box body 31 in the second accommodating space 102.

[0038] In this circuit box assembly, the circuit box at one end inside the accommodating space is precisely positioned by the cooperation between the positioning part and the abutting part, while the circuit box near the open end of the accommodating space is detachably connected by the fixing part and the docking part. This design allows the circuit box to be easily installed and fixed from the outside of the accommodating space. The connection mechanism design of this circuit box assembly is simple and efficient, successfully solving the difficulties existing in the installation and disassembly process of traditional circuit boxes, and significantly reducing the cost of production and maintenance. Its easy assembly feature not only simplifies the production process, but also greatly facilitates the maintenance and replacement work of after-sales service personnel, achieving efficient and convenient maintenance.

[0039] In this embodiment, the housing 10 includes a mounting base plate 11, a first side plate 12, a second side plate 13, a rear side plate 15, and a top plate 14. The first side plate 12 and the second side plate 13 are arranged in a horizontal plane along a second direction ( Figure 4 The first side plate 12 and the second side plate 13 are arranged opposite to each other (in the direction indicated by the arrow "Y" in the middle), and their lower ends are fixed on the mounting base plate 11, the rear side plate 15 is connected between the rear ends of the first side plate 12 and the second side plate 13 along the first direction, and a first accommodation space 101 is formed between the first side plate 12, the second side plate 13, the rear side plate 15 and the mounting base plate 11. The top plate 14 is installed between the upper ends of the first side plate 12 and the second side plate 13 and connected to them. The upper ends of the first side plate 12 and the second side plate 13 have a first protrusion 121 and a second protrusion 131 extending out of the top plate 14, so that a second accommodation space 102 is constructed between the first protrusion 121, the second protrusion 131 and the top plate 14. The structure of the housing 10 is cleverly designed so that a second accommodation space 102 is formed between the top plate 14 and the upper ends of the first side plate 12 and the second side plate 13. This configuration effectively reduces the amount of required materials while ensuring the overall structural strength and stability of the circuit box assembly, thereby reducing production costs. In addition, the lightweight design also reduces the overall weight of the circuit box assembly, making it easier to install and carry.

[0040] In this embodiment, the first box body 21 includes a connecting bottom plate 213, a first front cover plate 211, a first rear cover plate 212, a first fixing plate 214 and a second fixing plate (not shown in the figure), the first front cover plate 211 and the first rear cover plate 212 are arranged relatively front to back along a first direction, the lower ends of the first front cover plate 211 and the first rear cover plate 212 are fixed on the connecting bottom plate 213, the first fixing plate 214 and the second fixing plate are arranged relatively along a second direction, and the two ends of the first fixing plate 214 are respectively connected to one end of the first front cover plate 211 and the first rear cover plate 212, and the two ends of the second fixing plate are respectively connected to the other end of the first front cover plate 211 and the first rear cover plate 212.

[0041] See also Figure 6In this embodiment, the first positioning portion includes a first positioning block 16 disposed in the rear end of the first accommodating space 101 along the first direction, the first positioning block 16 is provided with a first positioning inclined surface 161, and the first abutting portion includes an abutting block 216 disposed on the rear end of the first box body 21 along the first direction, the abutting block 216 is provided with a first abutting inclined surface 216a; the angles formed by the first positioning inclined surface 161 and the first abutting inclined surface 216a with the first direction are both acute angles, and the angles are equal. Such a design utilizes the principle of inclined surface matching. When the first circuit box 20 enters the first accommodating space 101 along the first direction, the first positioning inclined surface 161 of the first positioning block 16 will come into contact with the first abutting inclined surface 216a of the abutting block 216, and the first circuit box 20 is smoothly and accurately positioned by relying on the interaction force of the inclined surfaces. The design of the acute angle inclined surface not only simplifies the positioning process of the circuit box, but also effectively limits the movement of the first box body 21 in the opposite direction and the vertical direction of the first direction, ensuring the stability and reliability of the installation. In this embodiment, there are two first positioning blocks 16, which are arranged at intervals along the second direction and are respectively mounted on the mounting base plate 11. There are also two abutment blocks 216, which are respectively mounted on the first rear cover plate 212.

[0042] See also Figure 4 , 5 9, 10, in this embodiment, the first fixing portion includes at least one first limiting boss 17 (in this embodiment, there are two first limiting bosses 17) arranged on the front end of the mounting base 11 along the first direction, the first docking portion includes at least one second limiting boss 217 (in this embodiment, there are two second limiting bosses 217) arranged on the front end of the first box body 21 along the first direction, the first limiting boss 17 and the second limiting boss 217 are both provided with fixing holes, and the first box body 21 is provided with at least one (in this embodiment, two) notch 218 extending along the first direction to avoid the first limiting boss 17. When the first box body 21 is slid into the first accommodating space 101, the positioning surfaces of the first limiting boss 17 and the second limiting boss 217 contact, and the first fastener 41 (in this embodiment, the first fastener 41 is a screw) is screwed into the fixing holes on the first limiting boss 17 and the second limiting boss 217 to achieve fixation. In this embodiment, the two first limiting bosses 17 are respectively welded on the mounting base plate 11 , and the two second limiting bosses 217 are respectively welded on the connecting base plate 213 .

[0043] In this embodiment, the first side plate 12 and the second side plate 13 are provided with a first notch A122 and a second notch A (not shown in the figure) at the lower corners of the front ends along the first direction, and the two first limiting bosses 17 are respectively fixed at the positions of the mounting base plate 11 corresponding to the first notch A122 and the second notch A; the first front cover plate 211 is provided with a first notch B211a and a second notch B at the lower corners of both ends along the second direction, and the two second limiting bosses 217 are respectively fixed at the positions of the first front cover plate 211 corresponding to the first notch B211a and the second notch B. With this structure, the two first limiting bosses 17 can play a guiding role when the first circuit box 20 slides into or out of the first accommodating space 101.

[0044] Preferably, the first fixing portion also includes an edge portion 111 arranged on the front end of the mounting base plate 11 along the first direction, and the first docking portion also includes at least one mounting ear 213a (two mounting ears in this embodiment) arranged on the front end of the first box body 21 along the first direction, and fixing holes are provided on the edge portion 111 and the mounting ear 213a. When the first box body 21 is slid into the first accommodating space 101, the mounting ear 213a contacts the edge portion 111, and the second fastener 42 (the second fastener 42 in this embodiment is a screw) is screwed into the fixing holes on the mounting ear 213a and the edge portion 111 to achieve fixation.

[0045] In this embodiment, the second box body 31 includes a second front cover plate 311, a second rear cover plate 312, a left side plate 314, a right side plate (not shown in the figure) and a top cover plate 313. The second front cover plate 311 and the second rear cover plate 312 are arranged relatively front to back along a first direction. The upper ends of the second front cover plate 311 and the second rear cover plate 312 are fixed on the top cover plate 313. The left side plate 314 and the right side plate (not shown in the figure) are arranged relatively along the second direction, and the two ends of the left side plate 314 are respectively connected to one end of the second front cover plate 311 and the second rear cover plate 312, and the two ends of the right side plate (not shown in the figure) are respectively connected to the other end of the second front cover plate 311 and the second rear cover plate 312.

[0046] See also Figure 6In this embodiment, the second positioning portion includes a second positioning block 18 disposed in the rear end of the second accommodating space 102 along the first direction, and the second positioning block 18 is provided with a second positioning inclined surface 181. The second abutting portion includes a second positioning block B316 disposed on the rear end of the second box body 31 along the first direction, and the second positioning block B316 is provided with a second abutting inclined surface 316a; the angles formed by the second positioning inclined surface 181 and the second abutting inclined surface 316a with the first direction are both acute angles, and the angles are equal. Such a design utilizes the principle of inclined surface matching. When the second circuit box 30 enters or leaves the second accommodating space 102 along the first direction, the second positioning inclined surface 181 of the second positioning block 18 will come into contact with the second abutting inclined surface 316a of the second positioning block B316, and the second circuit box 30 is smoothly and accurately positioned by relying on the interaction force of the inclined surfaces. The design of the acute angle inclined surface not only simplifies the positioning process of the circuit box, but also effectively limits the movement of the circuit box in the opposite direction and the vertical direction of the first direction, ensuring the stability and reliability of the installation. In this embodiment, there are two second positioning blocks 18, which are spaced apart along the second direction and are respectively mounted on the top plate 14. There are also two second positioning blocks B316, which are respectively mounted on the second rear cover plate 312.

[0047] In this embodiment, the second fixing portion includes at least one groove 141 arranged on the front end of the top plate 14 along the first direction, and the second docking portion includes at least one limiting lug 317 arranged on the front end of the second box body 31 along the first direction, and the bottom of the groove 141 and the limiting lug 317 are both provided with fixing holes. When the first box body 21 is slid into the first accommodating space 101, the limiting lug 317 is inserted into the corresponding groove 141, and the third fastener 43 (the third fastener 43 in this embodiment is a screw) is screwed into the bottom of the groove 141 and the fixing hole on the limiting lug 317 to achieve connection. This design not only simplifies the fixing steps of the circuit box during assembly, ensures the stability between the circuit box and the housing 10 through the fastener connection mechanism, but also facilitates rapid disassembly when maintenance or replacement is required. By using the cooperation between the groove 141 and the limiting lug 317, the circuit box is quickly positioned and locked, and the overall assembly efficiency and safety are improved. In addition, through this design, the possibility of loosening of the components is reduced, and the reliability and stability of the circuit box during use are ensured. In this example, there are two grooves 141 , which are arranged at intervals along the second direction. There are two limiting lugs 317 , which are arranged at the lower end of the second front cover plate 311 .

[0048] In one embodiment, the first box body 21 and the second box body 31 are respectively provided with a first handle 215 and a second handle 315 on the front end along the first direction to facilitate pulling out the first box body 21 and the second box body 31 .

[0049] When the first circuit box 20 is installed, it is only necessary to push the first handle 215 along the installation base plate 11 and the two second limiting bosses 217. When the first positioning block 16 and the positioning surface of the abutting block 216 are in contact (such as Figure 8 As shown in the figure, the second limiting boss 217 on the connecting bottom plate 213 is in contact with the positioning surface of the first limiting boss 17 on the mounting bottom plate 11, and the first fastener 41 and the second fastener 42 are used to connect them, so that the first circuit box 20 is fixed. When disassembling, just unscrew the first fastener 41 and the second fastener 42, and pull the first circuit box 20 out axially by the handle.

[0050] When the second circuit box 30 is installed, it is only necessary to push the second handle 315 along the top plate 14 and the first protrusion 121 of the first side plate 12 and the second protrusion 131 of the second side plate 13. When the connecting conical surfaces of the second positioning block 18 and the second positioning block B316 contact (such as Figure 5 As shown in FIG. 1 , the limiting lug 317 is just inserted into the corresponding groove 141, and the third fastener 43 is used to connect the second circuit box 30. When disassembling, just unscrew the third fastener 43 and pull the second circuit box 30 axially out through the second handle 315.

[0051] This circuit box assembly has a simple connection structure, which solves the problem that the existing circuit box is inconvenient to install and disassemble and the screws are easy to fall into the shell 10. It is low-cost, easy to produce and assemble, and easy to install and disassemble, making it more convenient and quick for after-sales maintenance personnel to repair and replace.

[0052] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A circuit box assembly, characterized in that: include: The housing is provided with at least one accommodating space, wherein the front end of the accommodating space along the first direction is provided with an opening and a fixing portion, the fixing portion is fixed on the housing, and a positioning portion is provided in the accommodating space; At least one circuit box, comprising a box body for accommodating electrical components, the box body being able to slide into or out of the accommodating space through the opening, the box body being provided with a docking portion at a front end along a first direction and abutting portion at a rear end; When the box body is slid into the accommodating space, the abutting portion of the box body and the positioning portion of the shell abut against each other, and the docking portion of the box body is detachably connected to the fixing portion of the shell to fix the box body in the accommodating space.

2. The circuit box assembly according to claim 1, characterized in that: The positioning portion is provided with a positioning slope, and the abutting portion is provided with a abutting slope. The angles formed by the positioning slope and the abutting slope with the first direction are both acute angles, and the angles are equal in size; when the box body is slid into the accommodating space, the abutting slopes are in contact with the abutting slopes.

3. The circuit box assembly according to claim 1, characterized in that: The fixing portion of the shell and the docking portion of the box body are both provided with fixing holes, the fixing portion and the docking portion are detachably connected by a fastener screwed into the fixing hole, and the fixing portion is arranged near the edge of the opening.

4. The circuit box assembly according to claim 1, characterized in that: A handle is provided on the front end of the box along the first direction.

5. The circuit box assembly according to any one of claims 1 to 4, characterized in that: The shell has a first accommodating space and a second accommodating space, the first accommodating space is provided with a first fixing portion at the front end along the first direction, and a first positioning portion is provided in the rear end, the second accommodating space is located above the first accommodating space, the second accommodating space is provided with a second fixing portion at the front end along the first direction, and a second positioning portion is provided in the rear end; the at least one circuit box includes a first circuit box and a second circuit box, the first circuit box includes a first box body, the first box body is accommodated in the first accommodating space, the second circuit box includes a second box body, the second box body is accommodated in the second accommodating space, the first box body is provided with a first docking portion at the front end along the first direction, and a first abutting portion at the rear end, the second box body is provided with a second docking portion at the front end along the first direction, and a second abutting portion at the rear end.

6. The circuit box assembly according to claim 5, characterized in that: The shell includes a mounting base plate, a first side plate, a second side plate, a rear side plate and a top plate, the first side plate and the second side plate are arranged relatively to each other in a second direction, the second direction is perpendicular to the first direction in a horizontal plane, the lower ends of the first side plate and the second side plate are fixed to the mounting base plate, the rear side plate is connected between the rear ends of the first side plate and the second side plate along the first direction, the first accommodating space is formed between the first side plate, the second side plate, the rear side plate and the mounting base plate, the top plate is connected between the upper ends of the first side plate and the second side plate, the first side plate and the second side plate respectively have a first protrusion and a second protrusion protruding from the top plate, and the second accommodating space is formed between the first protrusion and the second protrusion and the top plate.

7. The circuit box assembly according to claim 6, characterized in that: The first fixing portion includes at least one first limiting boss arranged on the inner side wall corresponding to the front end of the first accommodating space along the first direction, and the first docking portion includes at least one second limiting boss arranged on the front end of the first box body along the first direction, and the first limiting boss and the second limiting boss are both provided with fixing holes, and the first box body is provided with at least one notch extending along the first direction to avoid the first limiting boss; when the first box body is slid into the first accommodating space, the first limiting boss and the second limiting boss are in contact with each other, and the fasteners are screwed into the fixing holes on the first limiting boss and the second limiting boss to achieve fixation.

8. The circuit box assembly according to claim 7, characterized in that: The first limiting bosses and the second limiting bosses are respectively provided with a first notch and a second notch at the lower corners of the front ends of the first side plate and the second side plate along the first direction, and the two first limiting bosses are respectively fixed on the mounting base plate at positions corresponding to the first notch and the second notch; the first box body is respectively provided with a first notch and a second notch on the lower sides at both ends along the second direction, and the two second limiting bosses are respectively fixed on the first box body at positions corresponding to the first notch and the second notch.

9. The circuit box assembly according to claim 6, characterized in that: The first fixing portion includes an edge portion arranged on the front end of the mounting base along the first direction, and the first docking portion includes at least one mounting ear arranged on the front end of the first box body along the first direction, and fixing holes are provided on the edge portion and the mounting ear. When the first box body is slid into the first accommodating space, the mounting ear and the edge portion are in contact, and fasteners are screwed into the mounting ear and the fixing holes on the edge portion to achieve fixation.

10. The circuit box assembly according to claim 6, characterized in that The second fixing portion includes at least one groove arranged on the front end of the top plate along the first direction, and the second docking portion includes at least one limiting lug arranged on the front end of the second box body along the first direction, and fixing holes are provided on the bottom of the groove and the limiting lug. When the second box body is slid into the second accommodating space, the limiting lug is inserted into the corresponding groove and fixed by screwing a fastener into the bottom of the groove and the fixing hole on the limiting lug.

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