CN111970879A

CN111970879A - Multifunctional electrical box capable of being externally inserted with PCB

Info

Publication number: CN111970879A
Application number: CN202010975293.0A
Authority: CN
Inventors: 董顺民
Original assignee: Individual
Current assignee: Jiang Huihui
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2020-11-20
Anticipated expiration: 2040-09-16
Also published as: CN111970879B

Abstract

The invention discloses a multifunctional electrical box capable of being externally plugged with a PCB (printed circuit board), and particularly relates to the technical field of electrical boxes. The protective cover can protect the electronic element and the PCB circuit board on the electrical box, prevents the electronic element and the PCB circuit board on the electrical box from directly contacting with the outside air, reduces the possibility that the outside dust is adsorbed on the electronic element and the PCB circuit board, is convenient for splitting between the transparent protective cover and the electrical box, is further convenient for replacing the electronic element and the PCB circuit board on the electrical box, can simply and conveniently complete the dismounting between the electrical box and the mounting plate, is convenient for replacing the electrical box in the later period, and is convenient for later use.

Description

Multifunctional electrical box capable of being externally inserted with PCB

Technical Field

The invention relates to the technical field of electrical boxes, in particular to a multifunctional electrical box capable of being externally plugged with a PCB.

Background

The electrical apparatus box is integrated a lot of electronic components together, above-mentioned device is many kinds, and is huge in quantity, wiring electrical apparatus box if expose in the air for a long time, increase the ageing speed of electronic component and PCB circuit board easily, reduce life, the dust also adsorbs electronic component and PCB circuit board easily simultaneously, and then influence the normal use of equipment, and electrical apparatus box is generally through the bolt mounting in the assigned position, the later stage of being not convenient for is to the dismouting of electrical apparatus box, and then the in-service use of being not convenient for, there is certain limitation.

Disclosure of Invention

In order to overcome the above defects in the prior art, embodiments of the present invention provide a multifunctional electrical box capable of being externally plugged with a PCB, so as to solve the problems in the background art that an electronic component and a PCB are exposed to the outside for a long time, so that the aging speed of the electronic component and the PCB is increased, dust is also easily adsorbed on the electronic component and the PCB, and thus the normal use of equipment is affected, and meanwhile, the electrical box is generally installed at a designated position by a bolt, which is inconvenient for later-stage disassembly and assembly of the electrical box.

In order to achieve the purpose, the invention provides the following technical scheme: a multifunctional electrical box capable of being externally spliced with a PCB circuit board comprises an electrical box, wherein a mounting plate is arranged on one side of the electrical box, a transparent protective cover is arranged on one side of the electrical box, which is far away from the mounting plate, a rectangular ring is fixedly connected to one side of the transparent protective cover, which is close to the electrical box, an annular groove is formed in one side of the electrical box, which is close to the rectangular ring, a limiting ring is arranged in the annular groove, the limiting ring is fixedly connected with the rectangular ring, a fixing ring is sleeved on one end of the electrical box, one side of the fixing ring is fixedly connected with one side of the mounting plate, first fixing plates are arranged above and below the electrical box, the first fixing plates are fixedly connected with the mounting plate, limiting blocks are fixedly connected to the top and the bottom of the electrical box, a clamping groove is formed in one side of the limiting blocks, which is far away from the electrical, the first fixing plate is connected with the rectangular ring through a pressing assembly, the pressing assembly comprises a second fixing plate arranged on one side of the first fixing plate, the first fixing plate is fixedly connected with the second fixing plate, a third fixing plate fixedly connected with one side, far away from the first fixing plate, of the second fixing plate, a pressing plate is arranged on one side, close to the transparent protective cover, of the third fixing plate, one side of the pressing plate is connected with one side of the third fixing plate through a hinge, one side of the pressing plate is in contact with one side of the rectangular ring, the pressing plate and the third fixing plate are connected through a limiting assembly, and a heat dissipation assembly is arranged in the transparent protective cover.

In a preferred embodiment, the lifting assembly includes a first movable plate disposed on one side of the first limiting plate, the first movable plate is fixedly connected to the first limiting plate, a first fixing plate is penetrated through one end of the first movable plate, a first supporting plate is disposed on one side of the first fixing plate away from the limiting block, one side of the first supporting plate is fixedly connected to one side of the first movable plate, the first supporting plate is connected to the first fixing plate through a first spring, and a clamping assembly matched with the first movable plate is disposed on one side of the first fixing plate.

In a preferred embodiment, the clamping assembly includes a fixing column disposed on one side of the second fixing plate, the fixing column is fixedly connected to the second fixing plate, a threaded groove is formed in one end of the fixing column, a first screw rod is disposed in the threaded groove, and a limiting groove matched with the first screw rod is formed in one side of the first movable plate.

In a preferred embodiment, one end of the first lead screw extends to the outside of the thread groove, a handle is fixedly connected to one side of the first lead screw, and a first pull ring is fixedly connected to one side of the first movable plate.

In a preferred embodiment, the limiting component comprises a fixed block arranged on one side of the pressing plate, the fixed block is fixedly connected with the pressing plate, a first limiting hole is formed on the fixed block, a second limiting hole matched with the first limiting hole is formed on the third fixing plate, a second limiting plate is arranged in the second limiting hole, one end of the second limiting plate extends into the first limiting hole, the other end of the second limiting plate is fixedly connected with a connecting plate positioned on one side of the third fixing plate, a second supporting plate is arranged on one side of the connecting plate far away from the third fixing plate, the second supporting plate is fixedly connected with the second fixing plate, a second movable plate is arranged on one side of the second supporting plate far away from the connecting plate, the second movable plate is connected with the second supporting plate through a second spring, and a third limiting plate is fixedly connected with one side of the second movable plate close to the second supporting plate, the third limiting plate penetrates through the second supporting plate, and one side of the third limiting plate is fixedly connected with the connecting plate.

In a preferred embodiment, a second pull ring is fixedly connected to a side of the second movable plate away from the second support plate.

In a preferred embodiment, the heat dissipation assembly comprises two heat dissipation holes formed in the transparent protective cover, a dust removal net is arranged in each heat dissipation hole, a heat dissipation fan located on one side of one heat dissipation hole is arranged on the inner wall of one side of the transparent protective cover, two second lead screws are fixedly connected to one side of the heat dissipation fan, each second lead screw penetrates through the transparent protective cover, and a nut located on the outer wall of one side of the transparent protective cover is sleeved on one end of each second lead screw.

In a preferred embodiment, one side of the mounting plate is provided with a counter bore.

In a preferred embodiment, a sealing ring is fixedly connected to a side of the limiting ring away from the rectangular ring, and the sealing ring is in contact with the inner wall of the annular groove.

The invention has the technical effects and advantages that:

1. through the arrangement of the electric appliance box, the mounting plate, the transparent protective cover, the rectangular ring, the annular groove, the limiting ring, the fixing ring, the first fixing plate, the second fixing plate, the third fixing plate, the pressing plate, the hinge and the limiting assembly, electronic elements and a PCB (printed Circuit Board) on the electric appliance box can be protected, the electronic elements and the PCB on the electric appliance box are prevented from directly contacting with outside air, the possibility that outside dust is adsorbed on the electronic elements and the PCB is reduced, the transparent protective cover and the electric appliance box are convenient to split, and the electronic elements and the PCB on the electric appliance box are convenient to replace;

2. through the matching action of the electric appliance box, the mounting plate, the fixing ring, the first fixing plate, the limiting block, the clamping groove, the first limiting plate, the first movable plate, the first supporting plate, the first spring and the first pull ring, the disassembly and assembly between the electric appliance box and the mounting plate can be simply and conveniently completed, the electric appliance box can be conveniently replaced in the later period, and the later-period use is convenient;

3. through the matching effect of the first fixing plate, the first movable plate, the limiting groove, the fixing column, the thread groove, the first screw rod and the handle, the position of the first movable plate can be limited, so that the first limiting plate is kept in a state of being separated from the clamping groove, the electrical box is further convenient to disassemble and assemble, and convenience is improved;

4. through the cooperation that sets up louvre, dust removal net, heat dissipation fan, second lead screw and nut, dispel the heat in to transparent protection casing, reduce equipment because of the normal use's of temperature influence possibility, through the sealing ring that sets up, increased the leakproofness of annular groove and spacing ring junction.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a schematic diagram of a first fixing plate structure according to the present invention.

Fig. 4 is a partially enlarged structural view of a portion a in fig. 3.

FIG. 5 is a schematic view of a rectangular ring structure according to the present invention.

Fig. 6 is a schematic diagram of a connecting plate structure according to the present invention.

Fig. 7 is a schematic diagram of a third fixing plate structure according to the present invention.

Fig. 8 is a schematic diagram of a first movable plate structure according to the present invention.

Fig. 9 is a schematic view of a fixing post structure according to the present invention.

The reference signs are: 1. an electrical box; 2. mounting a plate; 3. a transparent protective cover; 4. a rectangular ring; 5. an annular groove; 6. a limiting ring; 7. a fixing ring; 8. a first fixing plate; 9. a second fixing plate; 10. a limiting block; 11. a card slot; 12. a first limit plate; 13. a third fixing plate; 14. a pressing plate; 15. a hinge; 16. a first movable plate; 17. a first support plate; 18. a first spring; 19. a first pull ring; 20. a limiting groove; 21. fixing a column; 22. a thread groove; 23. a first lead screw; 24. a handle; 25. a seal ring; 26. a fixed block; 27. a first limit hole; 28. a second limiting hole; 29. a second limiting plate; 30. a connecting plate; 31. a second support plate; 32. a second movable plate; 33. a second spring; 34. a third limiting plate; 35. a second tab; 36. heat dissipation holes; 37. a dust removal net; 38. a heat dissipation fan; 39. a second lead screw; 40. and a nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in attached figures 1-9, the multifunctional electrical box capable of being externally plugged with a PCB comprises an electrical box 1, a mounting plate 2 is arranged on one side of the electrical box 1, a transparent protective cover 3 is arranged on one side of the electrical box 1 away from the mounting plate 2, a rectangular ring 4 is fixedly connected to one side of the transparent protective cover 3 close to the electrical box 1, an annular groove 5 is formed in one side of the electrical box 1 close to the rectangular ring 4, a limiting ring 6 is arranged in the annular groove 5, the limiting ring 6 is fixedly connected with the rectangular ring 4, a fixing ring 7 is sleeved at one end of the electrical box 1, one side of the fixing ring 7 is fixedly connected with one side of the mounting plate 2, first fixing plates 8 are arranged above and below the electrical box 1, the first fixing plates 8 are fixedly connected with the mounting plate 2, limiting blocks 10 are fixedly connected to the top and the bottom of the electrical box 1, and a, a first limiting plate 12 is arranged in the clamping groove 11, the first limiting plate 12 is connected with a first fixing plate 8 through a lifting assembly, and the first fixing plate 8 is connected with the rectangular ring 4 through a pressing assembly;

the pressing assembly comprises a second fixing plate 9 arranged on one side of the first fixing plate 8, the first fixing plate 8 is fixedly connected with the second fixing plate 9, one side of the second fixing plate 9, far away from the first fixing plate 8, is fixedly connected with a third fixing plate 13, one side, close to the transparent protective cover 3, of the third fixing plate 13 is provided with a pressing plate 14, one side of the pressing plate 14 is connected with one side of the third fixing plate 13 through a hinge 15, one side of the pressing plate 14 is in contact with one side of the rectangular ring 4, the pressing plate 14 is connected with the third fixing plate 13 through a limiting assembly, and a heat dissipation assembly is arranged in the transparent protective cover 3.

Further, the lifting assembly comprises a first movable plate 16 arranged on one side of the first limiting plate 12, the first movable plate 16 is fixedly connected with the first limiting plate 12, one end of the first movable plate 16 penetrates through the first fixed plate 8, a first supporting plate 17 is arranged on one side, away from the limiting block 10, of the first fixed plate 8, one side of the first supporting plate 17 is fixedly connected with one side of the first movable plate 16, the first supporting plate 17 is connected with the first fixed plate 8 through a first spring 18, and a clamping assembly matched with the first movable plate 16 is arranged on one side of the first fixed plate 8; the first movable plate 16 is driven to move, so that the first movable plate 16 drives the first limit plate 12 to disengage from the slot 11, and the position of the limit block 10 is released, and the first spring 18 is in a stretched state.

Further, the clamping assembly comprises a fixed column 21 arranged on one side of the second fixed plate 9, the fixed column 21 is fixedly connected with the second fixed plate 9, one end of the fixed column 21 is provided with a thread groove 22, a first screw rod 23 is arranged in the thread groove 22, and one side of the first movable plate 16 is provided with a limiting groove 20 matched with the first screw rod 23; when the limiting groove 20 moves to one side of the first lead screw 23, the first lead screw 23 is rotated, the length of the first lead screw 23 in the thread groove 22 is changed through the matching of the first lead screw 23 and the thread groove 22, and then one end of the first lead screw 23 is screwed into the limiting groove 20, so that the position of the first movable plate 16 is limited at the moment, and further the first limiting plate 12 is kept in a state of being separated from the clamping groove 11, and further the electrical box 1 is conveniently disassembled and assembled, and the convenience is improved.

Further, one end of the first lead screw 23 extends to the outside of the thread groove 22, one side of the first lead screw 23 is fixedly connected with a handle 24, and one side of the first movable plate 16 is fixedly connected with a first pull ring 19; the first movable plate 16 is driven to move conveniently by the first pull ring 19.

Further, the position limiting assembly comprises a fixed block 26 disposed at one side of the pressing plate 14, the fixed block 26 is fixedly connected with the pressing plate 14, a first position limiting hole 27 is formed on the fixed block 26, a second position limiting hole 28 matched with the first position limiting hole 27 is formed on the third fixing plate 13, a second position limiting plate 29 is disposed in the second position limiting hole 28, one end of the second position limiting plate 29 extends into the first position limiting hole 27, the other end of the second position limiting plate 29 is fixedly connected with a connecting plate 30 disposed at one side of the third fixing plate 13, a second supporting plate 31 is disposed at one side of the connecting plate 30 far away from the third fixing plate 13, the second supporting plate 31 is fixedly connected with the second fixing plate 9, a second movable plate 32 is disposed at one side of the second supporting plate 31 far away from the connecting plate 30, the second movable plate 32 is connected with the second supporting plate 31 through a second spring 33, and a third position limiting plate 34 is fixedly connected at, the third limiting plate 34 penetrates through the second supporting plate 31, and one side of the third limiting plate 34 is fixedly connected with the connecting plate 30; the second movable plate 32 is far away from the second support plate 31 by driving the second pull ring 35 to move, the second spring 33 is in a stretching state, and then the third limit plate 34 drives the connection plate 30 to move, so that one end of the second limit plate 29 is separated from the first limit hole 27, thereby releasing the limit of the position of the fixed block 26, allowing the pressing plate 14 to rotate relative to the third fixed plate 13, that is, releasing the pressing of the pressing plate 14 to the position of the rectangular ring 4.

Further, a second pull ring 35 is fixedly connected to a side of the second movable plate 32 away from the second support plate 31; the second movable plate 32 is driven to move conveniently by the second pull ring 35.

Further, the heat dissipation assembly comprises two heat dissipation holes 36 arranged on the transparent protective cover 3, a dust removal net 37 is arranged in each heat dissipation hole 36, a heat dissipation fan 38 located on one side of one heat dissipation hole 36 is arranged on the inner wall of one side of the transparent protective cover 3, two second lead screws 39 are fixedly connected to one side of each heat dissipation fan 38, each second lead screw 39 penetrates through the transparent protective cover 3, and a nut 40 located on the outer wall of one side of the transparent protective cover 3 is sleeved at one end of each second lead screw 39; dispel the heat in transparent protection casing 3 through heat dissipation fan 38, reduce the equipment because of the normal use's of temperature influence probably, through the cooperation of nut 40 and second lead screw 39, the dismouting between heat dissipation fan 38 and the transparent protection casing 3 of being convenient for.

Furthermore, a counter bore is formed in one side of the mounting plate 2; the mounting plate 2 is mounted at a designated position through the matching of the external fixing bolt and the counter bore.

Further, one side of the limiting ring 6, which is far away from the rectangular ring 4, is fixedly connected with a sealing ring 25, and the sealing ring 25 is in contact with the inner wall of the annular groove 5; by the sealing ring 25, the sealing performance of the joint of the annular groove 5 and the limiting ring 6 is improved.

The working principle of the invention is as follows: through the cooperation of the external fixing bolt and the counter bore, the mounting plate 2 is installed at a designated position, the transparent protective cover 3 is arranged to protect the electronic component and the PCB circuit board on the electrical box 1, so as to prevent the electronic component and the PCB circuit board on the electrical box 1 from directly contacting with the external air, and reduce the possibility of external dust being adsorbed on the electronic component and the PCB circuit board, and at the same time, the second pull ring 35 is driven to move, so that the second movable plate 32 is far away from the second support plate 31, the second spring 33 is in a stretching state, and further the third limiting plate 34 drives the connecting plate 30 to move, so that one end of the second limiting plate 29 is separated from the first limiting hole 27, thereby releasing the limit of the position of the fixing block 26, so that the pressing plate 14 can rotate relative to the third fixing plate 13, and further releasing the pressing of the pressing plate 14 on the position, when one end of the other second limit plate 29 is separated from the first limit hole 27, the pressing on the rectangular ring 4 can be released, the transparent protective cover 3 is driven to be far away from one end of the electric box 1, the limit ring 6 is separated from the annular groove 5, the separation between the transparent protective cover 3 and the electric box 1 can be completed, and the electronic element and the PCB circuit board on the electric box 1 can be conveniently replaced, similarly, the separation step is reversely operated, the installation of the transparent protective cover 3 can be completed, when the electric box 1 needs to be removed, the transparent protective cover 3 is firstly removed, and the first movable plate 16 is driven to move, so that the first movable plate 16 drives the first limit plate 12 to be separated from the clamping groove 11, the fixing of the position of the limit block 10 can be released, the first spring 18 is in a stretching state, when the limit groove 20 moves to one side of the first lead screw 23, the first lead screw 23 is rotated, and the first lead screw 23 is matched, the length of the first screw rod 23 in the thread groove 22 is changed, so that one end of the first screw rod 23 is screwed into the limiting groove 20, the position of the first movable plate 16 is limited at the moment, the first limiting plate 12 is kept in a state of being separated from the clamping groove 11, the electrical box 1 is further convenient to disassemble and assemble, convenience is improved, similarly, the other first limiting plate 12 is separated from the clamping groove 11, the electrical box 1 is driven to move away from the mounting plate 2, the electrical box 1 is separated from the fixing ring 7, the electrical box 1 can be disassembled, similarly, the disassembling step is reversely operated, the electrical box 1 can be assembled, the disassembly and assembly between the electrical box 1 and the mounting plate 2 can be simply and conveniently completed, the electrical box 1 can be conveniently replaced in the later period, later-stage use is facilitated, heat dissipation is performed in the transparent protective cover 3 through the heat dissipation fan 38, and the possibility of normal use of equipment due to temperature influence is reduced, through the cooperation of nut 40 and second lead screw 39, be convenient for the dismouting between heat dissipation fan 38 and the transparent protection casing 3, through the sealing ring 25 that sets up, increased the leakproofness of annular groove 5 and spacing ring 6 junction.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the present invention is not limited to the above preferred embodiments, but rather, any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a but multi-functional electrical apparatus box of outside grafting PCB circuit board which characterized in that: comprises an electrical box (1), wherein a mounting plate (2) is arranged on one side of the electrical box (1), a transparent protective cover (3) is arranged on one side, away from the mounting plate (2), of the electrical box (1), a rectangular ring (4) is fixedly connected to one side, close to the electrical box (1), of the transparent protective cover (3), an annular groove (5) is formed in one side, close to the rectangular ring (4), of the electrical box (1), a limiting ring (6) is arranged in the annular groove (5), the limiting ring (6) is fixedly connected with the rectangular ring (4), a fixing ring (7) is sleeved at one end of the electrical box (1), one side of the fixing ring (7) is fixedly connected with one side of the mounting plate (2), first fixing plates (8) are arranged above and below the electrical box (1), the first fixing plates (8) are fixedly connected with the mounting plate (2), and limit blocks (10) are fixedly connected to the top and the bottom of the electrical box (1), a clamping groove (11) is formed in one side, away from the electric appliance box (1), of the limiting block (10), a first limiting plate (12) is arranged in the clamping groove (11), the first limiting plate (12) is connected with a first fixing plate (8) through a lifting assembly, and the first fixing plate (8) is connected with the rectangular ring (4) through a pressing assembly;

the pressing assembly comprises a second fixing plate (9) arranged on one side of the first fixing plate (8), the first fixing plate (8) is fixedly connected with the second fixing plate (9), one side, far away from the first fixing plate (8), of the second fixing plate (9) is fixedly connected with a third fixing plate (13), one side, close to the transparent protective cover (3), of the third fixing plate (13) is provided with a pressing plate (14), one side of the pressing plate (14) is connected with one side of the third fixing plate (13) through a hinge (15), one side of the pressing plate (14) is in contact with one side of the rectangular ring (4), the pressing plate (14) is connected with the third fixing plate (13) through a limiting assembly, and a heat dissipation assembly is arranged in the transparent protective cover (3).

2. The multifunctional electrical box of claim 1, wherein the PCB circuit board can be externally plugged in the multifunctional electrical box, and the multifunctional electrical box is characterized in that: the lifting assembly comprises a first movable plate (16) arranged on one side of a first limiting plate (12), the first movable plate (16) is fixedly connected with the first limiting plate (12), one end of the first movable plate (16) penetrates through a first fixing plate (8), one side of the first fixing plate (8) far away from a limiting block (10) is provided with a first supporting plate (17), one side of the first supporting plate (17) is fixedly connected with one side of the first movable plate (16), the first supporting plate (17) is connected with the first fixing plate (8) through a first spring (18), and one side of the first fixing plate (8) is provided with a clamping assembly matched with the first movable plate (16).

3. The multifunctional electrical box of claim 2, wherein the PCB circuit board can be externally plugged in the multifunctional electrical box, and the multifunctional electrical box is characterized in that: the clamping assembly comprises a fixing column (21) arranged on one side of a second fixing plate (9), the fixing column (21) is fixedly connected with the second fixing plate (9), a thread groove (22) is formed in one end of the fixing column (21), a first screw rod (23) is arranged in the thread groove (22), and a limiting groove (20) matched with the first screw rod (23) is formed in one side of a first movable plate (16).

4. The multifunctional electrical box of claim 3, wherein the PCB circuit board can be externally plugged in the multifunctional electrical box, and the multifunctional electrical box is characterized in that: one end of the first screw rod (23) extends to the outside of the thread groove (22), one side of the first screw rod (23) is fixedly connected with a handle (24), and one side of the first movable plate (16) is fixedly connected with a first pull ring (19).

5. The multifunctional electrical box of claim 1, wherein the PCB circuit board can be externally plugged in the multifunctional electrical box, and the multifunctional electrical box is characterized in that: the limiting assembly comprises a fixing block (26) arranged on one side of the pressing plate (14), the fixing block (26) is fixedly connected with the pressing plate (14), a first limiting hole (27) is formed in the fixing block (26), a second limiting hole (28) matched with the first limiting hole (27) is formed in the third fixing plate (13), a second limiting plate (29) is arranged in the second limiting hole (28), one end of the second limiting plate (29) extends into the first limiting hole (27), the other end of the second limiting plate (29) is fixedly connected with a connecting plate (30) arranged on one side of the third fixing plate (13), a second supporting plate (31) is arranged on one side, away from the third fixing plate (13), of the connecting plate (30), the second supporting plate (31) is fixedly connected with the second fixing plate (9), a second movable plate (32) is arranged on one side, away from the connecting plate (30), of the second supporting plate (31), the second movable plate (32) is connected with the second support plate (31) through a second spring (33), one side of the second movable plate (32) close to the second support plate (31) is fixedly connected with a third limiting plate (34), the third limiting plate (34) penetrates through the second support plate (31), and one side of the third limiting plate (34) is fixedly connected with the connecting plate (30).

6. The multifunctional electrical box capable of being externally plugged with the PCB circuit board as claimed in claim 5, wherein: and a second pull ring (35) is fixedly connected to one side, away from the second support plate (31), of the second movable plate (32).

7. The multifunctional electrical box of claim 1, wherein the PCB circuit board can be externally plugged in the multifunctional electrical box, and the multifunctional electrical box is characterized in that: the heat dissipation assembly comprises two heat dissipation holes (36) formed in the transparent protective cover (3), a dust removal net (37) is arranged in each heat dissipation hole (36), a heat dissipation fan (38) located on one side of one heat dissipation hole (36) is arranged on the inner wall of one side of the transparent protective cover (3), two second lead screws (39) are fixedly connected to one side of the heat dissipation fan (38), the second lead screws (39) penetrate through the transparent protective cover (3), and a nut (40) located on the outer wall of one side of the transparent protective cover (3) is sleeved on one end of each second lead screw (39).

8. The multifunctional electrical box of claim 1, wherein the PCB circuit board can be externally plugged in the multifunctional electrical box, and the multifunctional electrical box is characterized in that: one side of the mounting plate (2) is provided with a counter bore.

9. The multifunctional electrical box of claim 1, wherein the PCB circuit board can be externally plugged in the multifunctional electrical box, and the multifunctional electrical box is characterized in that: one side fixedly connected with sealing ring (25) that rectangular ring (4) were kept away from in spacing ring (6), sealing ring (25) contact with the inner wall of annular groove (5).