JP6988441B2 - Canister water intrusion prevention structure - Google Patents

Description

The present invention relates to a water intrusion prevention structure of a canister.

Conventionally, vehicles such as automobiles are equipped with a canister that adsorbs evaporative fuel gas generated in a fuel tank, and the canister is provided with a purge air pipe that introduces outside air into the canister. The canister supplies the outside air introduced from the air opening at the end of the purge air pipe and the evaporated fuel gas adsorbed by the fuel adsorbent stored in the canister to the intake passage of the engine. .. In a canister having such a structure, it is necessary to prevent water or the like from entering the air opening.

Conventionally, as a technique for preventing water from entering the canister, the technique described in Patent Document 1 is known. In the technique described in Patent Document 1, the canister is attached to the side frame, and the end of the atmospheric communication pipe is inserted into the central portion of the cross member in the vehicle width direction. With such a configuration, the one described in Patent Document 1 can suppress the intrusion of water and mud into the air communication pipe, and can suppress the odor of the fuel from entering the vehicle interior by going back through the purge air pipe.

Japanese Unexamined Patent Publication No. 2017-141719

However, in the conventional technique described in Patent Document 1, water and mud may flow in the cross member as described in paragraph 0027. Therefore, in the conventional technique described in Patent Document 1, there is a possibility that mud and water cannot be reliably prevented from entering the atmospheric communication pipe. It is also conceivable that the evaporated fuel gas that has flowed back from the canister through the atmospheric communication pipe will stay in the narrow space inside the cross member. Therefore, it may not be appropriate to place the end of the air communication pipe inside the sealed cross member.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a water intrusion prevention structure for a canister that can surely prevent water or the like from entering the canister through a purge air pipe. It is something to do.

In the present invention, a fuel tank for storing fuel, a canister for adsorbing evaporative fuel gas generated in the fuel tank, one end thereof is connected to the canister, and an air opening for taking in air is provided at the other end. It is a water intrusion prevention structure of the canister in the vehicle equipped with the purged air pipe, and the vehicle has a pair of left and right side frames extending in the front-rear direction of the vehicle separated in the vehicle width direction and a pair of the above. side is disposed above the side frames of one of the frames, a floor member forming a floor surface for supporting a sheet, one end located outside the one of the side frame at the vehicle width direction of the floor member and extending building wall member downwardly to one of the side frame from parts, and extending buildings rear wall member downwardly to one of the side frame from the rear end of said floor member, one of the side from the front end of the floor member and a extension building front wall member downwardly to the frame, wherein the floor member, said wall member, and the rear wall member, the front wall member and the top, side, rear and underfloor space surrounded the front one A box-shaped box-shaped member is arranged on the upper side of the side frame, and the atmosphere opening is arranged behind the vehicle in the underfloor space. ..

As described above, according to the present invention, it is possible to reliably prevent water or the like from entering the canister through the purge air pipe.

FIG. 1 is a plan view of the rear part of a vehicle provided with a water intrusion prevention structure for a canister according to an embodiment of the present invention. FIG. 2 is a side view of a vehicle provided with a water intrusion prevention structure for a canister according to an embodiment of the present invention. FIG. 3 is a perspective view of a lower portion of the front seat of a vehicle provided with a water intrusion prevention structure for a canister according to an embodiment of the present invention. FIG. 4 is a plan view of the lower portion of the front seat of the vehicle provided with the water intrusion prevention structure of the canister according to the embodiment of the present invention. FIG. 5 is a cross-sectional view taken along the line V-V direction of FIG. FIG. 6 is a cross-sectional view taken along the line in the VI-VI direction of FIG.

The water intrusion prevention structure of the canister according to the embodiment of the present invention has a fuel tank for storing fuel, a canister for adsorbing evaporative fuel gas generated in the fuel tank, and one end thereof connected to the canister to allow air to flow. It is a structure to prevent water intrusion of the canister in a vehicle equipped with a purge air pipe provided at the other end of the air opening to take in, and the vehicle forms the seat and the floor surface directly under the seat to form the seat. The supporting floor member, a pair of left and right side frames that pass under the floor member and extend in the front-rear direction of the vehicle, and an underfloor space below the floor member that extends downward from one end of the floor member in the vehicle width direction to the side frame. The side wall member constituting the side wall of the floor member, the rear wall member extending downward from the rear end portion of the floor member to the side frame, and the rear wall member constituting the rear wall of the underfloor space, and the rear wall member extending downward from the front end portion of the floor member to the side frame, under the floor. It is characterized by having a front wall member constituting the front wall of the space, a box-shaped box-shaped member is arranged in the underfloor space, and an atmosphere opening is arranged behind the vehicle of the box-shaped member in the underfloor space. do. Thereby, the water intrusion prevention structure of the canister according to the embodiment of the present invention can surely prevent water or the like from entering the canister through the purge air pipe.

Hereinafter, the water intrusion prevention structure of the canister according to the embodiment of the present invention will be described with reference to the drawings.

1 to 6 are views showing a water intrusion prevention structure of a canister according to an embodiment of the present invention. In FIGS. 1 to 6, in the up / down / front / rear / left / right directions, the width direction of the vehicle is the left / right direction and the height direction of the vehicle is the up / down direction when the traveling direction of the vehicle is the front and the backward direction is the rear.

First, the configuration will be described. In FIGS. 1 and 2, the vehicle 1 is a so-called cab-over type truck. Cab over means that the driver's seat is provided above the engine. The vehicle 1 includes a pair of side frames 2 and 3 on the left and right sides, and the side frames 2 and 3 extend in the front-rear direction of the vehicle 1 separated in the width direction of the vehicle 1 (hereinafter, simply referred to as the vehicle width direction). ing.

The side frames 2 and 3 extend from the vicinity of the front end portion of the vehicle 1 to the vicinity of the rear end portion. The side frames 2 and 3 are formed by molding a steel plate into a rail shape having a rectangular cross section, and are responsible for loads in each directions of extension, contraction, bending and twisting.

The vehicle 1 includes a plurality of cross members 7, 8 and 9, and the cross members 7, 8 and 9 extend in the vehicle width direction and are connected to the side frames 2 and 3. The left and right side frames 2, 3 are connected by these cross members 7, 8, and 9. The cross member 7 is arranged in front of the cross member 8, and the cross member 8 is arranged in front of the cross member 9. The cross members 7, 8 and 9 are made of a circular pipe material. A loading platform (not shown) is provided above the cross members 7, 8 and 9.

As described above, the vehicle 1 has a so-called ladder frame structure in which the side frames 2 and 3 are connected in a ladder shape by the cross members 7, 8 and 9. The vehicle 1 includes a plurality of cross members (not shown) other than the cross members 7, 8 and 9, and the side frames 2 and 3 are also connected by these cross members.

A power train 20 is provided in front of the cross member 7, and the power train 20 has an engine 21 that generates power and a transmission 22 that shifts and outputs the rotation speed of a crankshaft (not shown) of the engine 21. Have. The engine 21 and the transmission 22 are connected to each other in the front-rear direction, and are arranged vertically with respect to the vehicle 1. A front end portion of a propeller shaft (not shown) is connected to the rear end portion of the transmission 22, and the rotation shifted by the transmission 22 is transmitted to the propeller shaft. The rear end of the propeller shaft is connected to a differential device (not shown). The differential rotatably transmits the rotation of the propeller shaft to the rear wheels (not shown) via the left and right drive shafts (not shown).

The vehicle 1 includes a fuel tank 10 for storing fuel, and the fuel tank 10 is supported from above by cross members 7, 8 and 9 via brackets and the like (not shown). The fuel tank 10 is formed as a rectangular parallelepiped having long sides in the front-rear direction of the vehicle as a whole, and is arranged close to the right side frame 3.

A canister 11 is provided on the upper surface near the front end portion of the fuel tank 10, and the canister 11 adsorbs the evaporated fuel gas generated in the fuel tank 10. Further, the vehicle 1 includes a purge air pipe 12, and the purge air pipe 12 extends in the front-rear direction of the vehicle, and a part of the purge air pipe 12 is arranged along the inner surface of the side frame 3 in the vehicle width direction. One end (rear end) of the purge air pipe 12 is connected to the canister 11.

At the other end of the purge air pipe 12, an air opening port 14 for taking in air is provided. Further, the canister 11 is connected to an evaporative fuel intake pipe and an evaporative fuel discharge pipe (not shown) in addition to the purge air pipe 12. The evaporative fuel suction pipe is a pipe for introducing the evaporative fuel gas from the fuel tank 10. The evaporative fuel discharge pipe is a pipe that discharges the evaporative fuel gas adsorbed on the canister 11 to the intake passage of the engine 21.

In FIG. 5, the vehicle 1 includes a seat 30 on which a driver or the like sits, and a rectangular floor member 31 that forms a floor surface directly below the seat 30 and supports the seat 30. The right side frame 3 passes under the floor member 31 and extends in the front-rear direction of the vehicle.

An underfloor space S, which will be described later, is formed below the floor member 31. The floor member 31 has a role as a lid for opening and closing the underfloor space S. Specifically, the seat 30 is designed to be flipped backward with the rear end as a rotation fulcrum, and when the seat 30 is flipped backward, the floor member 31 is flipped up integrally with the seat 30. , The upper part of the underfloor space S is opened.

In FIGS. 3, 4, and 5, the vehicle 1 includes a side wall member 32, extends downward from one end of the floor member 31 in the vehicle width direction to the side frame 3, and is a space S below the floor member 31. It constitutes a side wall. The side wall member 32 is made of an outer plate or the like constituting the right side surface of the vehicle 1.

The side wall member 32 includes a bulging portion 32A that bulges toward the underfloor space S so as to accommodate the wheels (not shown) in the space outside the underfloor space S (outside the vehicle). An upper end portion of a strut type suspension device (not shown) for suspending wheels is connected to the upper portion of the bulging portion 32A.

Further, the vehicle 1 includes a rear wall member 35 and a front wall member 36. The rear wall member 35 extends downward from the rear end portion of the floor member 31 to the side frame 3 and constitutes the rear wall of the underfloor space S. The front wall member 36 extends downward from the front end portion of the floor member 31 to the side frame 3 and constitutes the front wall of the underfloor space S.

Here, the floor member 31, the side wall member 32, the rear wall member 35, and the front wall member 36 are also provided above the left side frame 2 on the left side of the vehicle 1 in the vehicle width direction. Therefore, the underfloor space S below the floor member 31 is surrounded by the floor member 31, the side wall member 32, the rear wall member 35, and the front wall member 36 from the upper surface, both side surfaces, the rear surface, and the front surface.

Further, as shown in FIG. 6, an engine 21 is arranged below the underfloor space S and between the left and right side frames 2, and the underfloor space S is generally surrounded by the engine 21 from below. .. The engine 21 is provided with a protective cover (not shown) that covers the entire lower surface of the engine 21.

Therefore, the underfloor space S can take in air to the atmosphere opening 14 on the engine 21 side below the floor space S, and blocks foreign substances such as water splashed up from the road surface by the engine 21 and its protective cover. It is open in all possible ways. Further, the underfloor space S is closed on the floor member 31, side wall member 32, rear wall member 35, and front wall member 36 side.

Therefore, the underfloor space S is a space in which foreign matter such as water is difficult to enter and is suitable for arranging an in-vehicle device such as an electrical component. For this reason, a box-shaped electrical component 37 is arranged on the upper surface of the side frame 3 in the underfloor space S. The electrical component 37 includes a relay box containing a relay that energizes and cuts off a drive current to an actuator or the like (not shown). The electrical component 37 constitutes the box-shaped member in the present invention.

Here, it is necessary to prevent foreign matter such as water from entering the atmosphere opening 14 of the purge air pipe 12. This is because if foreign matter such as water invades the atmosphere opening 14 and reaches the canister 11, the function of the canister 11 may be impaired.

Therefore, in this embodiment, the atmosphere opening 14 is also arranged in the underfloor space S like the electrical component 37. In this embodiment, the atmosphere opening 14 is arranged adjacent to the vehicle rear of the electrical component 37 in the underfloor space S.

In FIGS. 1 and 3, the electrical component 37 is arranged adjacent to the side wall member 32. Further, the atmosphere opening 14 is opened laterally facing the side wall member 32. In FIGS. 3 and 4, the vehicle 1 is provided with a cover member 40 in front of the electrical component 37 on the upper surface of the side frame 3 in the underfloor space S. The cover member 40 extends upward in the vehicle toward the floor member 31 and extends in the vehicle width direction toward the side wall member 32.

In FIGS. 3, 4, and 5, the upper end portion of the cover member 40 is close to the bottom surface of the floor member 31. The cover member 40 has a front surface portion 41 that covers at least a part of the front surface of the electrical component 37, and also has a side surface portion 42 that covers the side surface of the electrical component 37 opposite to the side wall member 32. At the rear end of the side surface portion 42, a bent portion 43 bent toward the side opposite to the side wall member 32 is provided.

In FIGS. 3 and 6, the bulging portion 32A of the side wall member 32 bulges toward the underfloor space S in front of the cover member 40. Further, in FIGS. 3 and 4, the cover member 40 has a curved portion 44, and the curved portion 44 is in front of the electrical component 37 from the end portion of the front surface portion 41 on the side wall member 32 to the front of the vehicle. It curves and extends toward. The front end portion of the curved portion 44 is in contact with the bulging portion 32A without a gap.

In FIGS. 2 and 6, the atmosphere opening 14 is arranged above the canister 11 in the vertical direction of the vehicle. The purge air pipe 12 has a trap portion 12A bent downward in a valley shape between the atmosphere opening port 14 and the canister 11.

In FIG. 5, the bottom surface of the floor member 31 has an inclined portion 31A, and the inclined portion 31A is inclined toward the lower side of the vehicle as it goes to the rear of the vehicle.

In FIG. 3, a cross member 6 is connected to the upper end of the rear wall member 35, and the cross member 6 extends in the vehicle width direction. At the end of the cross member 6 in the vehicle width direction, a wide portion 6A having a relatively large width in the vehicle front-rear direction is provided.

Behind the atmosphere opening 14 of the cross member 6, a narrow portion 6B having a relatively small width in the front-rear direction of the vehicle is provided. Further, the wide portion 6A and the narrow portion 6B are connected by being curved in an arc shape. Further, the cross member 6 has a certain thickness in the vertical direction of the vehicle.

Therefore, as shown by the arrow A4 in FIG. 3, the air at the upper end of the underfloor space S, which does not contain foreign matter such as water, flows backward due to the influence of the running wind and then hits the wide portion 6A, and the narrow portion. It turns to the 6B side and is guided to the atmosphere opening 14.

Therefore, the atmosphere opening 14 can take in air that does not contain foreign matter such as water. The cross member 6 is not shown in FIG. 1, and is represented by a two-dot chain line in FIG.

In FIGS. 1 and 4, the vehicle 1 includes a radiator fan 23 in front of the engine 21, and the radiator fan 23 blows air to the rear of the vehicle as shown by an arrow A1 in FIG. The radiator fan 23 is arranged between the side frames 2 and 3 in the vehicle width direction and on the front side of the vehicle with respect to the atmosphere opening 14.

Next, the action and effect will be described. The atmosphere opening 14 of the purge air pipe 12 is required to be arranged at a position where air can be taken in and is not exposed to foreign matter such as water even in rainy weather.

According to the water intrusion prevention structure of the canister of this embodiment, the vehicle 1 passes through the seat 30, the floor member 31 that forms the floor surface directly under the seat 30 and supports the seat 30, and the bottom of the floor member 31. It includes a side frame 3 extending in the front-rear direction of the vehicle.

Further, the vehicle 1 extends downward from one end of the floor member 31 in the vehicle width direction to the side frame 3, and forms a side wall of the underfloor space S below the floor member 31 and a rear end of the floor member 31. Before forming the front wall of the underfloor space S, extending downward from the portion to the side frame 3 and extending downward from the front end portion of the floor member 31 to the side frame 3 and the rear wall member 35 forming the rear wall of the underfloor space S. The wall member 36 is provided.

A box-shaped electrical component 37 is arranged in the underfloor space S, and the atmosphere opening 14 is arranged behind the vehicle of the electrical component 37 in the underfloor space S.

With the above configuration, the underfloor space S surrounded by the floor member 31 and the side frame 3 under the seat 30 is a position suitable for arranging the electrical component 37 because it is difficult for water or the like to enter from the outside of the vehicle. By arranging the atmosphere opening port 14 of the purge air pipe 12 in the space S, it is possible to prevent water or the like from entering the atmosphere opening port 14.

Further, since the atmospheric opening 14 is arranged at the rear of the vehicle of the electrical component 37, even if water or the like enters the underfloor space S, the electrical component before the water or the like enters the atmospheric opening 14. Since it is blocked by the product 37, it is possible to prevent water or the like from entering the atmospheric opening 14.

As a result, it is possible to reliably prevent water or the like from entering the canister 11 through the purge air pipe 12.

According to the water intrusion prevention structure of the canister of this embodiment, the electrical component 37 is arranged adjacent to the side wall member 32, and the atmosphere opening 14 is opened laterally facing the side wall member 32.

With the above configuration, the side wall member 32 exists in the opening direction of the atmosphere opening 14, and the electrical component 37 exists in front of the opening direction of the atmosphere opening 14, so that the route for water or the like to the atmosphere opening 14 is restricted. This makes it possible to reliably prevent water or the like from entering the atmosphere opening 14.

Further, since the atmosphere opening 14 is opened sideways, it is possible to prevent water or the like from falling and entering the atmosphere opening 14.

According to the water intrusion prevention structure of the canister of this embodiment, the vehicle 1 includes a cover member 40, and the cover member 40 has a front surface portion 41 that covers at least a part of the front surface of the electrical component 37. Further, the cover member 40 extends upward toward the floor member 31 and extends in the vehicle width direction toward the side wall member 32.

With the above configuration, since the underfloor space S between the electrical component 37 and the side wall member 32 is covered from the front by the cover member 40, it is possible to prevent water or the like from entering the underfloor space S from the front. As a result, it is possible to reliably prevent water or the like from entering the atmosphere opening 14.

According to the water intrusion prevention structure of the canister of this embodiment, the upper end portion of the cover member 40 is close to the bottom surface of the floor member 31. Further, the cover member 40 has a side surface portion 42 that covers the side surface of the electrical component 37 on the side opposite to the side wall member 32, and is bent toward the side opposite to the side wall member 32 at the rear end of the side surface portion 42. A bent portion 43 is provided.

With the above configuration, as shown by the arrow A3 in FIG. 3, when the air containing water or the like flows backward along the side surface portion 42 of the cover member 40 in the underfloor space S, the air containing the water or the like is bent. The portion 43 can guide the electric component 37 in a direction away from the electrical component 37, and can move away from the air opening 14. Therefore, it is possible to reliably prevent water or the like from entering the atmosphere opening 14.

According to the water intrusion prevention structure of the canister of this embodiment, the side wall member 32 has a bulging portion 32A that bulges toward the underfloor space S in front of the cover member 40. Further, the cover member 40 has a curved portion 44 that curves and extends toward the front of the vehicle from the end on the side of the side wall member 32 in the front surface portion 41 in front of the electrical component 37, and the front end portion of the curved portion 44 has a curved portion 44. It is in contact with the bulging portion 32A without a gap.

With the above configuration, as shown by arrow A2 in FIG. 3, when air containing water or the like flows backward toward the cover member 40 in the underfloor space S, the air containing the water or the like is transferred to the curved portion 44 of the cover member 40. And the front portion 41 can guide the electrical component 37 to the side and keep it away from the air opening 14. Therefore, it is possible to reliably prevent water or the like from entering the atmosphere opening 14.

According to the water intrusion prevention structure of the canister of this embodiment, the atmosphere opening 14 is arranged above the canister 11 in the vertical direction of the vehicle, and the purge air pipe 12 is located between the atmosphere opening 14 and the canister 11. , Has a trap portion 12A bent downward in a valley shape.

With the above configuration, even if water or the like enters the purge air pipe 12 from the atmosphere opening port 14, the water or the like is captured by the trap portion 12A, so that the water or the like can be surely invaded into the canister 11. Can be prevented.

According to the water intrusion prevention structure of the canister of this embodiment, the bottom surface of the floor member 31 has an inclined portion 31A that inclines toward the lower side of the vehicle toward the rear of the vehicle.

With the above configuration, as shown by the arrow A5 in FIG. 5, the air flowing backward along the lower surface of the floor member 31 is turned downward by the inclined portion 31A. Therefore, it is possible to prevent foreign matter such as water flowing with the air from passing over the electrical component 37 and entering the atmospheric opening 14.

According to the water intrusion prevention structure of the canister of this embodiment, the radiator fan 23 that blows air to the rear of the vehicle is located between the side frames 2 and 3 in the vehicle width direction, and is located on the front side of the vehicle with respect to the atmosphere opening 14. Is located in.

With the above configuration, behind the radiator fan 23, an air flow toward the rear is generated as shown by the arrow A1 in FIG. 3, so that foreign matter such as water is splashed up from the road surface or the like and flows toward the underfloor space S. Even in such a case, foreign matter such as water can be removed backward by the air flow by the radiator fan 23, and foreign matter such as water can be prevented from entering the underfloor space S and entering the atmosphere opening 14. ..

Although embodiments of the present invention have been disclosed, it will be apparent to those skilled in the art that modifications may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

1 ... vehicle, 2,3 ... side frame, 10 ... fuel tank, 11 ... canister, 12 ... purge air piping, 12A ... trap part, 14 ... atmosphere opening, 23 ... radiator fan, 30 ... seat, 31 ... floor member, 31A ... inclined part, 32 ... side wall member, 32A ... bulging part, 35 ... rear wall member, 36 ... front wall member, 37 ... electrical component (box-shaped member), 40 ... cover member, 41 ... front part, 42 ... side part, 43 ... bent part, 44. .. Curved part, S ... Underfloor space

Claims (9)

A fuel tank that stores fuel and
A canister that adsorbs the evaporated fuel gas generated in the fuel tank,
It is a water intrusion prevention structure of the canister in a vehicle equipped with a purge air pipe having one end connected to the canister and an air opening port for taking in air provided at the other end.
The vehicle
A pair of left and right side frames that are separated in the vehicle width direction and extend in the front-rear direction of the vehicle,
A floor member that is arranged above one of the pair of side frames and forms a floor surface that supports the seat, and a floor member.
And extending building wall member downwardly from one end portion located outside the one of the side frame at the vehicle width direction of the floor member to one of said side frames,
And extending buildings rear wall member downwardly to one of the side frame from the rear end of said floor member,
And a extension building front wall member downwardly to one of the side frame from the front end portion of said floor member,
An underfloor space surrounded by the floor member, the side wall member, the rear wall member, and the front wall member is formed on the upper side of one of the side frames.
A box-shaped member is arranged in the underfloor space, and a box-shaped member is arranged.
The canister's water intrusion prevention structure is characterized in that the atmosphere opening is arranged behind the vehicle of the box-shaped member in the underfloor space. The box-shaped member is arranged adjacent to the side wall member, and the box-shaped member is arranged adjacent to the side wall member.
The water intrusion prevention structure for a canister according to claim 1, wherein the air opening is opened laterally facing the side wall member. A cover member having a front surface portion that covers at least a part of the front surface of the box-shaped member is provided.
The water intrusion prevention structure for a canister according to claim 1 or 2, wherein the cover member extends upward to the floor member of the vehicle and extends to the side wall member in the vehicle width direction. The upper end portion of the cover member is close to the bottom surface of the floor member.
The cover member has a side surface portion that covers the side surface of the box-shaped member opposite to the side wall member.
The water intrusion prevention structure for a canister according to claim 3, wherein a bent portion bent toward the side opposite to the side wall member is provided at the rear end of the side surface portion. The side wall member has a bulging portion that bulges inward in the vehicle width direction in front of the cover member.
The cover member has a curved portion extending in front of the box-shaped member so as to be curved toward the front of the vehicle from an end portion of the front surface portion on the side of the side wall member.
The water intrusion prevention structure for a canister according to claim 3 or 4, wherein the front end portion of the curved portion is in contact with the bulging portion without a gap. The atmosphere opening is arranged above the canister in the vertical direction of the vehicle.
The canister according to any one of claims 1 to 5, wherein the purge air pipe has a trap portion bent downward in a valley shape between the air opening port and the canister. Water intrusion prevention structure. The water intrusion of the canister according to any one of claims 1 to 6, wherein the bottom surface of the floor member has an inclined portion that inclines toward the lower side of the vehicle toward the rear of the vehicle. Prevention structure. Claimed from claim 1, wherein the radiator fan that blows air to the rear of the vehicle is located between the left and right side frames in the vehicle width direction, and is arranged on the front side of the vehicle with respect to the atmosphere opening. Item 6. The water intrusion prevention structure of the canister according to any one of items 7. The water intrusion prevention structure for a canister according to any one of claims 1 to 8, wherein the box-shaped member is an electrical component.

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