CN215343164U

CN215343164U - Dustproof plug of car as a house

Info

Publication number: CN215343164U
Application number: CN202121549063.4U
Authority: CN
Inventors: 朱加勇; 吴望光
Original assignee: Yonghua Electrical Equipment Co ltd
Current assignee: Yonghua Electrical Equipment Co ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2021-12-28
Anticipated expiration: 2031-07-08

Abstract

The utility model discloses a dustproof plug for a motor home, and aims to provide a dustproof plug for a motor home, which reduces dust accumulation and has a dustproof function. It includes mounting cap, dustproof seat and plug subassembly, the plug subassembly set up on dustproof seat, the centre of dustproof seat is equipped with the through-hole, the bottom of dustproof seat is connected with the end cover, be equipped with the round platform on the end cover, round platform and end cover fixed connection, the bottom of dustproof seat and the side that is located the end cover are equipped with the board groove, partly of plug subassembly passes and cup joints with the mounting cap behind the through-hole, another part of plug subassembly is arranged in the board groove and is connected with dustproof seat, the round platform passes and is connected with plug subassembly behind the through-hole. The utility model has the beneficial effects that: the design achieves the purpose of reducing dust accumulation and having a dustproof function, and is convenient to install and safe to use.

Description

Dustproof plug of car as a house

Technical Field

The utility model relates to the technical field of plug correlation, in particular to a dustproof plug for a motor home.

Background

The motor home, also called as "home on wheel", has two functions of "house" and "car", but its attribute is also car, is a kind of movable car with essential basic facilities at home. Various household appliances are configured on the motor home, the motor home is provided with a vehicle-mounted battery, the vehicle-mounted battery needs to be charged from the outside, and a motor home plug needs to be connected with a socket on an external power supply when the motor home is charged. Because car as a house charging current is great, must guarantee plug and socket stable cooperation in the charging process, the dustproof of plug is in addition seriously considered, if the dust on the plug is too much, after the plug connection is accomplished, the dust is along with the connecting pipe gets into in the electrical part of car as a house, will appear certain potential safety hazard in service, serious can cause the damage of equipment, the plug in the car as a house does not all have dust keeper at present, it is dustproof to use modes such as wiping usually, this kind of dustproof mode not only is unfavorable for personnel's safety in the plug use, and lead to the dust to gather and participate in the oxidation, reduce plug life.

SUMMERY OF THE UTILITY MODEL

The utility model provides a dustproof plug with a dustproof function for a caravan, which can reduce dust accumulation in order to overcome the defect that the dust accumulation is caused by the fact that the plug in the caravan does not have the dustproof function in the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a car as a house dustproof plug, includes installation cap, dustproof seat and plug subassembly, plug subassembly set up on dustproof seat, the centre of dustproof seat is equipped with the through-hole, the bottom of dustproof seat is connected with the end cover, be equipped with the round platform on the end cover, round platform and end cover fixed connection, the bottom of dustproof seat and the side that is located the end cover are equipped with the board groove, some of plug subassembly passes and cup joints with the installation cap behind the through-hole, another part of plug subassembly is arranged in the board groove and is connected with dustproof seat, the round platform passes and is connected with plug subassembly after the through-hole.

The installation cap is used for being connected and the protection of circuit and plug subassembly, plug subassembly is the core component of dustproof plug, a socket connection for with the car as a house, plug subassembly passes behind the dustproof seat and is connected with the dustproof seat, inside plug subassembly bottom is arranged in to the round platform, the round platform protects plug subassembly with the end cover jointly, reduce the entering of dust, dustproof seat both can separate with plug subassembly, make plug subassembly remove the use, simultaneously can combine with plug subassembly and the socket fixed connection on the car as a house, block external most dust, reduce the time that plug subassembly exposes in the air, increase of service life, such design has reached the purpose that has dustproof function that the dust that reduces the dust and gather.

Preferably, one side of the end cover is provided with a guide block, the guide block is semicircular, one side of the dustproof seat is provided with a groove, a plurality of mounting holes are formed in the edge of the dustproof seat, the plate groove is formed in the dustproof seat, the end cover is quadrilateral, a movable shaft plate is arranged in the groove, the end cover is connected with the dustproof seat through the movable shaft plate, and the guide block corresponds to the movable shaft plate in a left-right mode by taking the end cover as the center. The guide block is convenient for stir the end cover, and the activity axleboard is convenient for the rotation of end cover, and the end cover can overturn wantonly and open and shut under the cooperation of guide block and activity axleboard, and the end cover is opened when plug structure is connected with the socket, closes when not using and closes, effectively prevents the contact of dust with participating in, dustproof seat accessible mounting hole and car as a house socket fixed connection increase plug structure's practical flexibility.

Preferably, the plug assembly comprises an insulating shell and a plug body, the plug body is arranged in the insulating shell, a plurality of screws are arranged on the upper end face of the insulating shell, a plurality of screw holes are formed in the upper end face of the plug body, the screws penetrate through the insulating shell and are arranged in the screw holes, a clamping block is arranged below the top surface inside the insulating shell and is connected with the insulating shell, a clamping groove matched with the clamping block is formed in the upper end face of the plug body, the clamping block is arranged in the clamping groove, the plug body is connected with the insulating shell through the matching of the screws and the clamping block, a plurality of elastic rings are arranged on the outer side face of the round platform, and the round platform is tightly matched with the inner wall of the insulating shell through the elastic rings. The insulating casing is used for protecting the plug structure, prevents the electric leakage electric shock when using, and the plug body is direct to be connected with the car as a house socket, and the screw is used for the fixed connection of insulating casing and plug body, and the fixture block is arranged in the joint of the insulating casing of being convenient for and plug body in the draw-in groove, and the fixture block cooperates with the screw to increase the insulating casing and plug body's the steadiness of being connected, constitutes plug assembly jointly.

Preferably, the insulation shell comprises a hollow cylinder and a square plate matched with the plate groove, the lower half part of the outer side of the hollow cylinder is provided with anti-skidding lines, the upper half part of the outer side of the hollow cylinder is sleeved with the mounting cap, the upper end face of the hollow cylinder is provided with a plurality of wiring holes, the square plate is arranged in the plate groove, and the insulation shell is connected with the dustproof seat through the square plate. The purpose of hollow cylinder is for better being connected with the plug body, and hollow cylinder's first half is used for installing cap and the better connection of insulating casing, the anti-skidding line of hollow cylinder the latter half, and convenient to use person grips the safe in utilization when insulating casing removes car as a house plug, and square board is arranged in and is increased the degree of agreeing with and the compactness of being connected in the board groove bottom the dust proof seat, and the wiring hole is convenient for circular telegram line and this body coupling of plug and is circular telegram for the plug.

Preferably, the mounting cap is hollow inside, the mounting cap sequentially comprises a first cylinder, a connecting piece and a second cylinder from top to bottom, the connecting piece is in a circular truncated cone shape, the connecting piece is respectively connected with the first cylinder and the second cylinder, the diameter of the first cylinder is smaller than that of the second cylinder, and the insulating shell is sleeved with the second cylinder. The inside cavity of installation cap is convenient for be connected with insulating casing, and cylinder two is used for the set of circuit, and the connecting piece is used for the circuit to gather together the integration to cylinder one, and the passageway of cylinder one is the circuit, and cylinder diameter is less than cylinder two, and the neatly of the circuit of being convenient for, the diameter of cylinder two is greater than the dispersion of cylinder one the circuit of being convenient for and is connected.

Preferably, three through holes are formed in the side edge above the insulating shell, a main limiting groove and two auxiliary limiting grooves are formed in the plug body, the main limiting groove and the two auxiliary limiting grooves are distributed in a triangular shape on the upper end face of the plug body, and the main limiting groove and the auxiliary limiting grooves correspond to the through holes one to one. The through hole is convenient for the connection and installation of bolt, and main spacing groove is used for the owner to participate in the installation and be connected with the limiting plate, and vice spacing groove is used for the limiting plate and vice installation and being connected of participating in, and the triangle-shaped distribution of main spacing groove and vice spacing groove accords with the position condition of triangle plug.

As preferred, one side of main spacing groove all is equipped with the limiting plate with one side of vice spacing groove, the limiting plate respectively with main spacing groove and vice spacing groove joint, the opposite side of main spacing inslot is equipped with main foot groove, main foot inslot be equipped with main participating in, main participating in arrange main foot inslot and with main spacing groove joint, vice spacing inslot opposite side be equipped with vice foot groove, vice foot inslot be equipped with vice participating in, vice participating in arrange vice foot inslot and with vice spacing groove joint. The limiting plate sets up the fixed of participating in of being convenient for in main spacing groove and vice spacing inslot, and main foot groove is used for main placing of participating in, increases the main steadiness of participating in and main spacing groove coupling, and vice foot groove is used for vice placing of participating in, increases vice participating in and vice spacing groove coupling's steadiness.

Preferably, the main pin and the auxiliary pin are both provided with bolts, the bolts in the main limiting grooves penetrate through the main pin to be connected with the limiting plates in the main limiting grooves, and the bolts in the auxiliary limiting grooves penetrate through the auxiliary pin to be connected with the limiting plates in the auxiliary limiting grooves. The limiting plate is used for installing and limiting the bolt, and the bolt is used for fixing and connecting the main pin and the limiting plate and is used for connecting a circuit, so that the plug assembly is convenient to electrify.

Preferably, a main jack is arranged in the main limiting groove, the main jack is arc-shaped, the main pin is composed of a transverse pin I and a vertical pin I, the transverse pin I of the main pin is arranged in the main pin groove, the vertical pin I of the main pin penetrates through the main jack and is arranged on the outer side of the plug body, and the shape of the vertical pin I on the main pin is matched with that of the main jack. The main jack is convenient for the first vertical pin of the main pin to pass through the plug body and expose outside, is convenient for being connected with a caravan socket, and the shape of the main jack is designed according to the main pin, so that the main pin is convenient to install.

Preferably, an auxiliary jack is arranged in the auxiliary limiting groove, the auxiliary jack is rectangular, the auxiliary pin is composed of a transverse pin II and a vertical pin II, a round hole is formed in the vertical pin II of the auxiliary pin, the transverse pin II of the auxiliary pin is arranged in the auxiliary pin groove, the vertical pin II of the auxiliary pin penetrates through the auxiliary jack and is arranged on the outer side of the plug body, and the shape of the vertical pin II of the auxiliary pin is matched with that of the auxiliary jack. The auxiliary plug hole is convenient for the vertical plug pin II of the main plug pin to penetrate through the plug body and expose outside, is convenient for connection with a caravan socket, and is designed according to the main plug pin in shape, so that the auxiliary plug pin is convenient to mount.

The utility model has the beneficial effects that: plug assembly is the core component of dustproof plug, a socket for with the car as a house is connected, dustproof seat is connected with plug assembly, both can separate with plug assembly, make plug assembly remove the use, simultaneously can combine with plug assembly and the socket fixed connection on the car as a house, the end cover is used for blockking external most dust, reduce the time that plug assembly exposes in the air, increase of service life, the mounting cap is used for the protection that circuit and plug assembly are connected, such design has reached the purpose that has dustproof function that reduces the dust and gathers, high durability and convenient installation, high safety in utilization.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a bottom view of the dust receptacle;

FIG. 3 is a schematic view of a portion of the structure of the present invention;

FIG. 4 is a bottom view of the insulating shell;

FIG. 5 is a schematic view of a portion of the structure of the plug body;

FIG. 6 is a top view of the plug body;

FIG. 7 is a schematic structural view of the plug body;

fig. 8 is a schematic view of the structure of the mounting cap.

In the figure: 1. the anti-skidding type plug comprises a mounting cap, 2 parts of an insulating shell, 3 parts of a dust-proof seat, 4 parts of a circular truncated cone, 5 parts of a guide block, 6 parts of a guide groove, 7 parts of a mounting hole, 8 parts of an end cover, 9 parts of a groove, 10 parts of a movable shaft plate, 11 parts of a hollow cylinder, 12 parts of a square plate, 13 parts of a through hole, 14 parts of a screw, 15 parts of a wiring hole, 16 parts of anti-skidding threads, 17 parts of a clamping block, 18 parts of a plug body, 19 parts of an auxiliary limiting groove, 20 parts of a screw hole, 21 parts of an auxiliary insertion hole, 22 parts of an auxiliary pin groove, 23 parts of a clamping groove, 24 parts of a main pin groove, 25 parts of a main insertion hole, 26 parts of a main limiting groove, 27 parts of an auxiliary pin, 28 parts of a bolt, 29 parts of a limiting plate, 30 parts of a main pin, 31 parts of a cylinder I, 32 parts of a connecting piece, 33 parts of a cylinder II and 34 parts of an elastic ring.

Detailed Description

The utility model is further described with reference to the following figures and detailed description.

As shown in fig. 1, a car as a house dustproof plug, including mounting cap 1, dustproof seat 3 and plug subassembly, plug subassembly sets up on dustproof seat 3, as shown in fig. 2, the centre of dustproof seat 3 is equipped with the through-hole, the bottom of dustproof seat 3 is connected with end cover 8, be equipped with round platform 4 on the end cover 8, round platform 4 and end cover 8 fixed connection, the bottom of dustproof seat 3 and the side that is located end cover 8 are equipped with board groove 6, partly of plug subassembly passes and cup joints with mounting cap 1 behind the round hole, another part of plug subassembly is arranged in board groove 6 and is connected with dustproof seat 3, round platform 4 passes and is connected with plug subassembly behind the round hole. One side of end cover 8 is equipped with guide block 5, and the shape of guide block 5 is semi-circular, and one side of dustproof seat 3 is equipped with recess 9, and the edge that just arranges plate groove 6 in on the dustproof seat 3 is equipped with a plurality of mounting holes 7, and the shape of end cover 8 is the quadrangle, is equipped with movable shaft plate 10 in the recess 9, and end cover 8 is connected with dustproof seat 3 through movable shaft plate 10, and guide block 5 and movable shaft plate 10 use end cover 8 to control correspondingly as the center.

As shown in fig. 1 and 5, the plug assembly includes an insulating shell 2 and a plug body 18, the plug body 18 is disposed in the insulating shell 2, the upper end surface of the insulating shell 2 is provided with a plurality of screws 14, the upper end surface of the plug body 18 is provided with a plurality of screw holes 20, the screws 14 penetrate through the insulating shell 2 and are disposed in the screw holes 20, as shown in fig. 4, a clamping block 17 is disposed below the top surface inside the insulating shell 2, the clamping block 17 is connected with the insulating shell 2, the upper end surface of the plug body 18 is provided with a clamping groove 23 matched with the clamping block 17, the clamping block 17 is disposed in the clamping groove 23, the plug body 18 is connected with the insulating shell 2 through the matching of the screws 14 and the clamping block 17, the outer side surface of the circular truncated cone 4 is provided with a plurality of elastic rings 34, and the circular truncated cone 4 is tightly matched with the inner wall of the insulating shell 2 through the elastic rings 34. As shown in fig. 3, the insulating case 2 is composed of a hollow cylinder 11 and a square plate 12 matched with the plate groove 6, the lower half part of the outer side of the hollow cylinder 11 is provided with anti-slip patterns 16, the upper half part of the outer side of the hollow cylinder 11 is sleeved with the mounting cap 1, the upper end face of the hollow cylinder 11 is provided with a plurality of wiring holes 15, the square plate 12 is arranged in the plate groove 6, and the insulating case 2 is connected with the dust-proof seat 3 through the square plate 12. As shown in fig. 8, the mounting cap 1 is hollow, the mounting cap 1 is composed of a first cylinder 31, a connecting piece 32 and a second cylinder 33 from top to bottom in sequence, the connecting piece 32 is in a circular truncated cone shape, the connecting piece is respectively connected with the first cylinder 31 and the second cylinder 33, the diameter of the first cylinder 31 is smaller than that of the second cylinder 33, and the insulating shell 2 is sleeved with the second cylinder 33.

Three through holes 13 are arranged on the side edge above the insulating shell 2, as shown in fig. 5, a main limiting groove 26 and two auxiliary limiting grooves 19 are arranged on the plug body 18, the main limiting groove 26 and the two auxiliary limiting grooves 19 are distributed in a triangular shape on the upper end face of the plug body 18, and the main limiting groove 26 and the auxiliary limiting grooves 19 are in one-to-one correspondence with the through holes 13. One side of main spacing groove 26 and one side of vice spacing groove 19 all are equipped with limiting plate 29, limiting plate 29 respectively with main spacing groove 26 and vice spacing groove 19 joint, the opposite side of main spacing groove 26 is equipped with main foot groove 24, be equipped with main participate in 30 in the main foot groove 24, main participate in 30 arrange main foot inslot 24 in and with main spacing groove 26 joint, the opposite side of vice spacing inslot 19 is equipped with vice foot groove 22, be equipped with vice participate in 27 in the vice foot inslot 22, vice participate in 27 arrange vice foot inslot in and with vice spacing groove 19 joint. As shown in fig. 6, the main pin 30 and the auxiliary pin 27 are both provided with a bolt 28, the bolt 28 in the main limiting groove 26 passes through the main pin 30 to be connected with the limiting plate 29 of the main limiting groove 26, and the bolt 28 in the auxiliary limiting groove 19 passes through the auxiliary pin 27 to be connected with the limiting plate 29 in the auxiliary limiting groove 19. The main limiting groove 26 is internally provided with a main jack 25, the main jack 25 is arc-shaped, as shown in fig. 7, the main pin 30 is composed of a transverse pin I and a vertical pin I, the transverse pin I of the main pin 30 is arranged in the main pin groove 24, the vertical pin I of the main pin 30 passes through the main jack 25 and is arranged on the outer side of the plug body 18, and the shape of the vertical pin I on the main pin 30 is matched with that of the main jack 25. The auxiliary limiting groove 19 is internally provided with an auxiliary jack 21, the auxiliary jack 21 is rectangular, the auxiliary pin 27 consists of a transverse pin II and a vertical pin II, the vertical pin II of the auxiliary pin 27 is provided with a round hole, the transverse pin II of the auxiliary pin 27 is arranged in the auxiliary pin groove 22, the vertical pin II of the auxiliary pin 27 penetrates through the auxiliary jack 21 and is arranged on the outer side of the plug body 18, and the shape of the vertical pin II of the auxiliary pin 27 is matched with that of the auxiliary jack 21.

Embodiment 1, during the use, utilize screw 14 to be connected insulating casing 2 and plug body 18, utilize guide block 5 to overturn end cover 8 to one side under the effect of activity axial slab 10, the plug subassembly passes the through-hole on dustproof seat 3, utilize square board 12 and the board groove 6 of insulating casing 2 bottom to be connected, the circuit passes through mounting cap 1 and is connected with the plug subassembly, after dustproof seat 3 and car as a house socket installation, connect plug subassembly and socket plug, the hand is placed anti-skidding line 16 department on insulating casing 2, the contact of control plug body 18 and socket, when the plug structure broke down, open mounting cap 1, unscrew screw 8 and pull out fixture block 17 from draw-in groove 23, look over the inside condition of plug body 18, twist bolt 28 and look over the connected condition of limiting plate 29 and main participate in 30 or vice participate in 27, maintain with this.

Embodiment 2, during the use, if dustproof seat 3 and car as a house socket are not connected, then the plug structure can be placed wantonly, and dustproof seat 3 combines with end cover 8 can prevent that the dust from getting into plug body 18, can protect main participating in 30 and vice participating in 27 simultaneously, and the damage that receives with other object contact when avoiding plug assembly to place wantonly to this increase of service life.

Claims

1. The utility model provides a car as a house dustproof plug, characterized by, is including installation cap (1), dustproof seat (3) and plug subassembly, plug subassembly set up on dustproof seat (3), the centre of dustproof seat (3) is equipped with the through-hole, the bottom of dustproof seat (3) is connected with end cover (8), be equipped with round platform (4) on end cover (8), round platform (4) and end cover (8) fixed connection, the bottom of dustproof seat (3) and the side that is located end cover (8) are equipped with board groove (6), some of plug subassembly pass and cup joint with installation cap (1) after the through-hole, another part of plug subassembly is arranged in board groove (6) and is connected with dustproof seat (3), round platform (4) pass the through-hole after be connected with plug subassembly.

2. The dustproof plug for the caravan according to claim 1, wherein a guide block (5) is arranged on one side of the end cover (8), the guide block (5) is semicircular, a groove (9) is formed in one side of the dustproof seat (3), a plurality of mounting holes (7) are formed in the dustproof seat (3) and are arranged at corners of the plate groove (6), the end cover (8) is quadrilateral, a movable shaft plate (10) is arranged in the groove (9), the end cover (8) is connected with the dustproof seat (3) through the movable shaft plate (10), and the guide block (5) corresponds to the movable shaft plate (10) left and right by taking the end cover (8) as a center.

3. The dustproof plug for the caravan according to claim 1, wherein the plug assembly comprises an insulating shell (2) and a plug body (18), the plug body (18) is arranged in the insulating shell (2), a plurality of screws (14) are arranged on the upper end surface of the insulating shell (2), a plurality of screw holes (20) are formed in the upper end surface of the plug body (18), the screws (14) penetrate through the insulating shell (2) and are arranged in the screw holes (20), a clamping block (17) is arranged below the top surface inside the insulating shell (2), the clamping block (17) is connected with the insulating shell (2), a clamping groove (23) matched with the clamping block (17) is formed in the upper end surface of the plug body (18), the clamping block (17) is arranged in the clamping groove (23), and the plug body (18) is connected with the insulating shell (2) through the matching of the screws (14) and the clamping block (17), a plurality of elastic rings (34) are arranged on the outer side face of the circular truncated cone (4), and the circular truncated cone (4) is tightly matched with the inner wall of the insulating shell (2) through the elastic rings (34).

4. The dustproof plug for the caravan according to claim 3, wherein the insulating shell (2) is composed of a hollow cylinder (11) and a square plate (12) matched with the plate groove (6), the lower outer half part of the hollow cylinder (11) is provided with anti-skid threads (16), the upper outer half part of the hollow cylinder (11) is sleeved with the mounting cap (1), the upper end face of the hollow cylinder (11) is provided with a plurality of wiring holes (15), the square plate (12) is placed in the plate groove (6), and the insulating shell (2) is connected with the dustproof seat (3) through the square plate (12).

5. The dustproof plug for the caravan as claimed in claim 4, wherein the mounting cap (1) is hollow inside, the mounting cap (1) is sequentially composed of a first cylinder (31), a connecting piece (32) and a second cylinder (33) from top to bottom, the connecting piece (32) is in a circular truncated cone shape, the connecting piece is respectively connected with the first cylinder (31) and the second cylinder (33), the diameter of the first cylinder (31) is smaller than that of the second cylinder (33), and the insulating shell (2) is sleeved with the second cylinder (33).

6. The dustproof plug for the caravan as claimed in claim 4, wherein three through holes (13) are formed in the upper side edge of the insulating shell (2), a main limiting groove (26) and two auxiliary limiting grooves (19) are formed in the plug body (18), the main limiting groove (26) and the two auxiliary limiting grooves (19) are distributed in a triangular shape on the upper end face of the plug body (18), and the main limiting groove (26) and the auxiliary limiting grooves (19) correspond to the through holes (13) one to one.

7. The dustproof plug for the caravan according to claim 6, wherein a limiting plate (29) is arranged on one side of the main limiting groove (26) and one side of the auxiliary limiting groove (19), the limiting plate (29) is respectively connected with the main limiting groove (26) and the auxiliary limiting groove (19) in a clamped mode, a main foot groove (24) is arranged on the other side of the main limiting groove (26), a main pin (30) is arranged in the main foot groove (24), the main pin (30) is arranged in the main foot groove (24) and connected with the main limiting groove (26) in a clamped mode, an auxiliary foot groove (22) is arranged on the other side of the auxiliary limiting groove (19), an auxiliary pin (27) is arranged in the auxiliary foot groove (22), and the auxiliary pin (27) is connected with the auxiliary limiting groove (19) in a clamped mode.

8. The dustproof plug for the caravan as claimed in claim 7, wherein the main pin (30) and the auxiliary pin (27) are both provided with bolts (28), the bolts (28) in the main limiting grooves (26) penetrate through the main pin (30) to be connected with the limiting plates (29) in the main limiting grooves (26), and the bolts (28) in the auxiliary limiting grooves (19) penetrate through the auxiliary pin (27) to be connected with the limiting plates (29) in the auxiliary limiting grooves (19).

9. The dustproof plug for the caravan as claimed in claim 7, wherein a main insertion hole (25) is formed in the main limiting groove (26), the shape of the main insertion hole (25) is arc-shaped, the main pin (30) is composed of a first transverse pin and a first vertical pin, the first transverse pin of the main pin (30) is arranged in the main pin groove (24), the first vertical pin of the main pin (30) passes through the main insertion hole (25) and is arranged on the outer side of the plug body (18), and the shape of the first vertical pin on the main pin (30) is matched with the shape of the main insertion hole (25).

10. The dustproof plug for the caravan as claimed in claim 7, wherein an auxiliary insertion hole (21) is formed in the auxiliary limiting groove (19), the auxiliary insertion hole (21) is rectangular, the auxiliary pin (27) is composed of a horizontal pin II and a vertical pin II, a round hole is formed in the vertical pin II of the auxiliary pin (27), the horizontal pin II of the auxiliary pin (27) is arranged in the auxiliary pin groove (22), the vertical pin II of the auxiliary pin (27) penetrates through the auxiliary insertion hole (21) and is arranged on the outer side of the plug body (18), and the shape of the vertical pin II of the auxiliary pin (27) is matched with that of the auxiliary insertion hole (21).