JP2024069828A - Canister - Google Patents

Abstract

To provide a canister which is advantageous in securing a freedom degree of arrangement and reducing a component cost.SOLUTION: A connector 18 is attached to an atmosphere port 28 so as to cover the atmosphere port 28, and the connector 18 includes a connector port 30 to which a quick connector provided at an end of an atmosphere release pipe is detachably attached. In a state that the connector 18 is attached to the atmosphere port 28, the connector 18 includes a large diameter cylinder 46 positioned in a radially outer side of a first cylinder 36 and a second cylinder 38, a small diameter cylinder 48 protruding from the large diameter cylinder 46 coaxially with the large diameter cylinder 46, and an annular plate 50 connecting a distal end of the large diameter cylinder 46 with a base end of the small diameter cylinder 48. In a state that a fitting portion 52 is fitted to a fitted portion 42, a space 56 is secured between an outer surface of the second cylinder 38 and an inner surface 1802 of the connector 18.SELECTED DRAWING: Figure 1

Description

The present invention relates to a canister.

2. Description of the Related Art Vehicles powered by internal combustion engines are equipped with canisters that use a fuel adsorbent to adsorb fuel evaporative gases that evaporate from the fuel in the fuel tank, thereby preventing the release of fuel evaporative gases into the atmosphere and reducing air pollution.
The canister is provided with an atmospheric port for introducing outside air into the canister, and the fuel adsorbed in the fuel adsorbent is supplied to the engine together with outside air introduced from the atmospheric port for combustion.
One end of an atmosphere release pipe is connected to the atmosphere port as a connection part, and the other end of the atmosphere release pipe serves as an atmosphere release port that is open to the atmosphere.
The shape of the connection part of the atmospheric vent pipe varies depending on the vehicle model. For example, one end of the atmospheric vent pipe may be used as the connection part, or a quick connector on the atmospheric vent pipe side provided at one end of the atmospheric vent pipe may be used as the connection part.
In this case, it would be disadvantageous in terms of cost to redesign the atmospheric port of the canister each time to match the specifications of the connection part of the atmospheric release pipe.
Therefore, the current response is as follows:
That is, the atmospheric port is formed as a cylindrical portion.
When the connection part of the atmosphere vent pipe is formed at one end of the atmosphere vent pipe, the connection part of the atmosphere vent pipe is directly connected to the cylindrical portion.
When the connection portion of the atmospheric release pipe is configured with an atmospheric release pipe side quick connector, an intermediate hose, a canister side quick connector, and a bracket are prepared.
One end of the intermediate hose is connected to the atmospheric port, the other end of the intermediate hose is connected to the canister side quick connector, and the canister side quick connector is connected to the atmospheric release pipe side quick connector.The intermediate hose is then fixed to the vehicle body using a bracket to maintain the position of the intermediate hose.

JP 2018-145863 A

However, in the above-mentioned conventional technology, extra space must be secured around the canister to accommodate the intermediate hose, which is disadvantageous in terms of ensuring freedom in terms of canister placement, and also has the disadvantage of requiring multiple parts, which increases component costs.
The present invention has been made in consideration of the above circumstances, and has an object to provide a canister which ensures freedom in the arrangement of the canister and is advantageous in reducing parts costs.

In order to achieve the above object, one embodiment of the present invention is characterized in that an atmospheric port is provided that includes a first cylindrical portion that protrudes from a canister case and has a mating portion formed therein, and a second cylindrical portion that protrudes from the first cylindrical portion and has a smaller diameter than the first cylindrical portion, and the connector having the connector port includes a mating portion that is mated with the mating portion, and when the mating portion is mated with the mating portion, a space is secured between the outer surface of the second cylindrical portion and the inner surface of the connector.

According to one embodiment of the present invention, the atmospheric vent tube can be directly connected to the second cylindrical portion without using a connector, and a connector can be attached to the atmospheric port, and the connector on the atmospheric vent tube side provided at the end of the atmospheric vent tube can be connected to the connector port.
Therefore, there is no need to reserve unnecessary space around the canister for placing an intermediate hose, as in the conventional method, which is advantageous in terms of ensuring freedom in placing the canister. Also, since it is sufficient to provide a single connector compared to the conventional method of providing multiple parts, it is advantageous in terms of reducing parts costs.
In addition, since a space is provided between the outer surface of the second cylindrical portion and the inner surface of the connector when the fitting portion is fitted into the mated portion, fuel evaporative gas leaking from the atmospheric port can be temporarily stored in the space, which is advantageous in preventing the release of fuel evaporative gas into the atmosphere and in suppressing air pollution.

FIG. 2 is a cross-sectional view of the canister according to the first embodiment. 1A is a cross-sectional view of a canister according to a second embodiment, and FIG. 1B is a cross-sectional view taken along line BB of FIG.

(First embodiment)
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In the drawings, the arrow UP indicates the upper side of the vehicle.
As shown in FIG. 1 , the canister 10 includes a fuel adsorbent, a canister case 16 that houses the fuel adsorbent, and a connector 18 that is attached to the canister case 16 .
The canister case 16 is made of synthetic resin and is rectangular in plan view, having an upper wall 1602, a lower wall 1604, and four side walls 1606 connecting the upper wall 1602 and the lower wall 1604, and only one of the four side walls 1606 is illustrated in FIG.
The interior of the canister case 16 is divided by a partition wall 1610 into a lower main chamber 20 and an upper auxiliary chamber 22 , and the main chamber 20 and the auxiliary chamber 22 communicate with each other via an opening (not shown) provided in the partition wall 1610 .
The fuel adsorbent is contained in both the main chamber 20 and the auxiliary chamber 22 .
In detail, the main chamber 20 is filled with a fuel adsorbent material, for example, granular activated carbon 12 .
A fuel adsorbent made of activated carbon 14 having a honeycomb structure is accommodated in the auxiliary chamber 22 via a pair of side walls 1606 .

The canister case 16 is provided with a tank port (vapor port) 24 , a purge port 26 , an atmospheric port 28 , and a connector port 30 .
The tank port 24 and the purge port 26 are provided in a side wall 1606 that separates the main chamber 20 , and the purge port 26 is provided above the tank port 24 .
A plate-shaped main chamber filter 32 for waterproofing and dustproofing is provided on the inner surface of the side wall 1606 in which the tank port 24 and the purge port 26 are provided, and the main chamber filter 32 covers the entire inner surface of the side wall 1606, including the inside of the tank port 24 and the inside of the purge port 26.
The tank port 24 communicates with the main chamber 20 and is a location to which the end of a vapor pipe connected to a fuel tank (not shown) is connected.
The purge port 26 communicates with the main chamber 20 and is a location to which an end of a purge pipe connected to an intake pipe of an engine (not shown) is connected.

The atmospheric port 28 is provided in a side wall 1606 that separates the sub-chamber 22 , and communicates with the sub-chamber 22 .
The atmospheric port 28 is a point to which one end of an atmospheric vent pipe (not shown) is connected, and the other end of the atmospheric vent pipe is an atmospheric vent opening that is open to the atmosphere, and a dust-proof and waterproof filter (not shown) is provided at the atmospheric vent opening.
In detail, the atmospheric port 28 includes a first tubular portion 36 protruding from the side wall 1606, and a second tubular portion 38 connected to an annular plate portion 40 at the tip of the first tubular portion 36, protruding from the annular plate portion 40 in a direction away from the side wall 1606, and having a smaller diameter than the first tubular portion 36.
The second cylindrical portion 38 is a portion to which an end of an atmosphere vent pipe is connected, and the second cylindrical portion 38 is open to the atmosphere via the atmosphere vent pipe.
A fitted portion 42 is provided at the base of the first cylindrical portion 36. The fitted portion 42 is formed as a recess that is provided on the outer circumferential surface of the first cylindrical portion 36 and extends in the circumferential direction of the first cylindrical portion 36.

A plate-shaped waterproof and dustproof auxiliary chamber filter 34 is provided on the inner surface of the annular plate portion 40 , and the auxiliary chamber filter 34 covers the entire inner surface of the annular plate portion 40 including the inside of the second cylindrical portion 38 .
An end of a cylindrical fuel adsorbent made of activated carbon 14 having a honeycomb structure is inserted into the inside of the first cylindrical portion 36 and is accommodated in abutment against the end face inside the first cylindrical portion 38 via the auxiliary chamber filter 34, in other words, is accommodated in abutment against the inner surface of the annular plate portion 40, and a first seal portion 44 is provided between the outer peripheral surface 1402 of the activated carbon 14 and the inner peripheral surface 3602B of the first cylindrical portion 36 to seal the space between them.
The first seal portion 44 is provided at a location displaced in the axial direction of the first cylindrical portion 36 with respect to the recess that constitutes the fitted portion 42 .

The connector 18 is attached to the atmospheric port 28 so as to cover the atmospheric port 28, and the connector 18 is provided with a connector port 30 to which a quick connector provided at the end of the atmospheric release tube is detachably attached.
The connector 18 is made of synthetic resin, and when the connector 18 is attached to the atmospheric port 28, the connector 18 is provided with a large diameter cylindrical portion 46 located radially outward of the first cylindrical portion 36 and the second cylindrical portion 38, a small diameter cylindrical portion 48 protruding from the large diameter cylindrical portion 46 coaxially with the large diameter cylindrical portion 46, and a ring plate portion 50 connecting the tip of the large diameter cylindrical portion 46 and the base end of the small diameter cylindrical portion 48.
A fitting portion 52 consisting of an annular protrusion protruding radially inward of the large diameter cylindrical portion 46 is provided at the base end of the large diameter cylindrical portion 46 , and the fitting portion 52 is provided so as to be able to be engaged with and disengaged from the fitted portion 42 .
When the mating portion 52 is mated with the mated portion 42, the inner surface 1802 of the connector 18 has an inner circumferential surface 1802A located radially outside the outer circumferential surface 3602A of the first tubular portion 36, and an inner end surface 1802B facing the annular plate portion 50 and the tip of the second tubular portion 38.
When the mating portion 52 is mated with the mated portion 42, a second seal portion 54 is provided to seal between the inner surface 1802 of the connector 18 and the outer peripheral surface 3602A of the first tubular portion 36, and in this embodiment, a second seal portion 54 is provided to seal between the inner surface 1802A of the large diameter tubular portion 46 and the outer peripheral surface 3602A of the first tubular portion 36.
The second seal portion 54 is provided at a location displaced in the axial direction of the first cylindrical portion 36 relative to the first seal portion 44 .
The small diameter cylindrical portion 48 is configured in a shape that allows a quick connector provided on the atmospheric release pipe to be attached and detached, and a flange portion 4802 is provided on the small diameter cylindrical portion 48, which constitutes the connector port 30. In the first embodiment, the connector port 30 and the atmospheric port 28 are provided coaxially.

In the present embodiment, the second seal portion 54 provides a seal between the inner surface 1802 of the connector 18 and the outer circumferential surface 4002 A of the annular plate portion 40 .
When the fitting portion 52 is fitted into the fitted portion 42 , a space 56 is provided between the outer surface of the second cylindrical portion 38 and the inner surface 1802 of the connector 18 .
In detail, a space 56A is secured between the outer peripheral surface 3802A of the second tubular portion 38 and the inner peripheral surface 1802A of the large diameter tubular portion 46 of the connector 18, and a space 56B communicating with the space 56A is secured between the tip surface 3802B of the second tubular portion 38 and the inner surface 5002 of the ring plate portion 50 of the connector 18.

Next, the use and operation of the canister 10 of this embodiment will be described.
As described above, the tank port 24 is connected to an end of a vapor pipe and is connected to a fuel tank (not shown) via the vapor pipe, and the purge port 26 is connected to an end of a purge pipe and is connected to an intake pipe of an engine (not shown) via the purge pipe.
The atmospheric port 28 is connected to an atmospheric vent pipe and is open to the atmosphere via the atmospheric vent pipe.
More specifically, the atmospheric release pipe may be a so-called hose alone or a hose with a quick connector, which is a hose alone provided with a quick connector at the end thereof.
When using a hose alone as the atmospheric vent pipe, the atmospheric port 28 is opened to the atmosphere via the atmospheric vent pipe by directly connecting the end of the atmospheric vent pipe to the second cylindrical portion 38 of the atmospheric port 28 without providing a connector 18 to the atmospheric port 28.
Furthermore, when a hose with a quick connector is used as the atmospheric vent pipe, the connector 18 is provided to the atmospheric port 28, and the quick connector provided at the end of the hose with a quick connector is connected to the connector port 30, so that the atmospheric port 28 is opened to the atmosphere via the atmospheric vent pipe.

Fuel evaporative gas that evaporates from the fuel in the fuel tank is adsorbed by the fuel adsorbent contained in the main chamber 20 and the auxiliary chamber 22 through the tank port 24, thereby preventing the release of the fuel evaporative gas into the atmosphere.
In addition, after the fuel adsorbed in the fuel adsorbent is desorbed from the fuel adsorbent, it is supplied to the engine via a purge pipe connected to the purge port 26 together with outside air introduced from the atmospheric port 28 via the atmospheric release pipe, and is combusted in the engine.

According to this embodiment, when a hose alone is used as the atmospheric vent pipe, the atmospheric vent pipe is connected directly to the second cylindrical portion 38 without using the connector 18, and when a hose with a quick connector is used as the atmospheric vent pipe, the connector 18 is attached to the atmospheric port 28 and the quick connector of the atmospheric vent pipe is connected to the connector port 30 of the connector 18.
Therefore, not only can it be used as an atmospheric vent pipe, but when a hose with a quick connector is used, only the connector 18 needs to be provided, and there is no need to provide multiple parts such as an intermediate hose, a quick connector connected to the intermediate hose, and a bracket, as in the past.
Therefore, there is no need to reserve unnecessary space around the canister 10 for arranging an intermediate hose as in the conventional method, which is advantageous in terms of ensuring freedom in arranging the canister 10, and also, since it is sufficient to provide a single connector 18 compared to the conventional method in which multiple parts are provided, it is advantageous in terms of reducing parts costs.
Furthermore, since a space 56 is provided between the outer surface of the second cylindrical portion 38 and the inner surface 1802 of the connector 18 when the fitting portion 52 is fitted into the fitted portion 42, the fuel evaporative gas leaking from the atmospheric port 28 can be temporarily stored in the space 56. This is advantageous in preventing the release of fuel evaporative gas into the atmosphere, and is advantageous in suppressing air pollution.

Furthermore, according to this embodiment, the end of the activated carbon 14 is housed in the first cylindrical portion 36, and a first seal portion 44 is provided to seal between the outer circumferential surface 1402 of the end of the activated carbon 14 and the inner circumferential surface 3602B of the first cylindrical portion 36 in a state in which the end of the activated carbon 14 is housed in the first cylindrical portion 36. Therefore, it is advantageous for the first seal portion 44 to reliably hold the end of the activated carbon 14 in the first cylindrical portion 36.
In addition, since the first cylindrical portion 36 is used to accommodate the end of the activated carbon 14, a large space can be secured to accommodate the activated carbon 14, and the volume of the activated carbon 14 can be increased, which is advantageous for adsorbing a larger amount of fuel evaporative gas by the canister 10. This is therefore advantageous for preventing the release of fuel evaporative gas into the atmosphere, and is advantageous for suppressing air pollution.

In addition, according to this embodiment, the activated carbon 14 is held in the canister case 16 with the end of the activated carbon 14 abutting against the end face inside the first cylindrical portion 36. This is more advantageous in terms of reliably holding the end of the activated carbon 14 in the first cylindrical portion 36.

Furthermore, according to this embodiment, the fitting portion 52 is formed by a recess provided on the outer peripheral surface 3602A of the first tubular portion 36 and extending circumferentially of the first tubular portion 36, and the first seal portion 44 is provided at a location displaced in the axial direction of the first tubular portion 36 relative to the recess.
Therefore, compared to a case where the first seal portion 44 is provided in a recessed portion of the first tubular portion 36 where the wall thickness is thin, the first seal portion 44 is provided in a portion where the wall thickness is ensured, so that the strength of the first tubular portion 36 against the pressing force applied from the first seal portion 44 can be ensured, which is advantageous in ensuring the durability of the atmospheric port 28.

In addition, according to this embodiment, when the connector 18 is engaged with the first tubular portion 36, the second seal portion 54 that seals between the inner surface 1802 of the connector 18 and the outer peripheral surface 3602A of the first tubular portion 36 is provided at a location displaced in the axial direction of the first tubular portion 36 relative to the first seal portion 44.
Therefore, compared to when the first seal portion 44 and the second seal portion 54 are provided in the same location, the pressing force applied to the first tubular portion 36 by the first seal portion 44 and the second seal portion 54 can be reduced, which is advantageous in ensuring the strength of the first tubular portion 36 and the durability of the atmospheric port 28.

In addition, according to this embodiment, an annular plate portion 40 is provided connecting the tip end of the first tubular portion 36 and the base end of the second tubular portion 38, and the second seal portion 54 is provided on the outer circumferential surface 4002A of the annular plate portion 40.
Therefore, the pressing force applied to the first cylindrical portion 36 from the second seal portion 54 can be received by the annular plate portion 40, which is more advantageous in ensuring the strength of the first cylindrical portion 36 and even more advantageous in ensuring the durability of the atmospheric port 28.

Second Embodiment
Next, a second embodiment will be described with reference to FIG.
The second embodiment differs from the first embodiment in the shape of a connector 18A, but other configurations are similar to those of the first embodiment.
In the following embodiment, the same parts and members as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted, and the description will focus on the differences.

In the first embodiment, the connector port 30 and the atmospheric port 28 are provided coaxially, whereas in the second embodiment, as shown in FIGS. 2(A) and 2(B), when the connector 18A is fitted into the first cylindrical portion 36, the axial direction of the connector port 30 and the axial direction of the second cylindrical portion 38 (atmospheric port 28) are different.
In this embodiment, the axial direction of the second tubular portion 38 extends horizontally, the axial direction of the connector port 30 extends vertically upward, and the axial direction of the second tubular portion 38 and the axial direction of the connector port 30 are perpendicular to each other.
When attached to the atmospheric port 28, the connector 18A comprises a large diameter cylindrical portion 46 located radially outward of the first cylindrical portion 36 and the second cylindrical portion 38, a circular end face portion 58 facing the ends of the annular plate portion 40 and the second cylindrical portion 38 and connecting the tip of the large diameter cylindrical portion 46, and a small diameter cylindrical portion 48 provided with a flange portion 4802 protruding from the outer circumferential surface of the large diameter cylindrical portion 46.
As in the first embodiment, the connector port 30 is formed by the small diameter cylindrical portion 48 .
When the mating portion 52 is mated with the mated portion 42, the inner surface 1802 of the connector 18A has an inner circumferential surface 1802A located radially outside the outer circumferential surface 3602A of the first tubular portion 36, and a circular inner end surface 1802C facing the annular plate portion 40 and the tip of the second tubular portion 38.

In order to maintain the axial direction of the connector port 30 in the intended direction, it is necessary to restrict rotation of the connector 18A about the axial center of the atmospheric port 28.
Therefore, the rotation of connector 18A may be restricted by providing a convex shape on one side of the bottom of the recess that constitutes fitted portion 42 and a concave shape on the other side of the tip of the protrusion that forms fitting portion 52, and by fitting these convex and concave shapes together. Alternatively, the rotation of connector 18A may be restricted by bonding the recess that constitutes fitted portion 42 and the protrusion that forms fitting portion 52 with an adhesive. Various conventionally known structures can be used as a structure for restricting the rotation of connector 18A.

Furthermore, a dust-proof and waterproof filter 60 is provided in a space 56 within the connector 18A that connects the connector port 30 and the second cylindrical portion 38 when the connector 18A is fitted into the first cylindrical portion 36 .
In this embodiment, the filter 60 has an annular plate shape, the second tubular portion 38 is inserted into the central hole 6002 of the filter 60, and the filter 60 is arranged in contact with the annular plate portion 40 and the inner end surface 1802C, as well as in contact with the outer peripheral surface 3802A of the second tubular portion 38 and the inner peripheral surface 1802A of the large diameter tubular portion 46.

The second embodiment not only produces the same effects as the first embodiment, but also has the advantage of ensuring the freedom of routing of the atmospheric vent pipe connected to the connector port 30, since the axial direction of the connector port 30 and the axial direction of the second tubular portion 38 are different, even if there are restrictions on the routing of the atmospheric vent pipe connected to the connector port 30 due to the layout of the structures around the canister 10.

Furthermore, according to the second embodiment, since the axial direction of the connector port 30 faces upward, the fuel vapor gas that leaks from the atmospheric port 28 and accumulates in the space 56 between the outer surface of the second cylindrical portion 38 and the inner surface 1802 of the connector 18A is likely to remain in the space 56 because it has a higher specific gravity than air.
Therefore, the fuel vapor gas is less likely to be discharged from the connector port 30 to the atmosphere release pipe, which is advantageous in preventing the release of fuel evaporative gas into the atmosphere and in suppressing air pollution.
It is preferable that the axial direction of the connector port 30 is at least inclined upward from the horizontal plane, but if the axial direction of the connector port 30 faces vertically upward as in the second embodiment, it is more advantageous in suppressing the discharge of fuel vapor gas from the connector port 30 to the atmospheric open pipe.

Furthermore, according to the second embodiment, when the connector 18A is fitted into the first tubular portion 36, a dustproof and waterproof filter 60 is provided using the space 56 connecting the connector port 30 and the second tubular portion 38. This makes it possible to omit the dustproof and waterproof filter attached to the atmospheric opening of the atmospheric vent tube, which is advantageous in terms of compacting the installation space for the atmospheric vent tube.
Incidentally, in the first embodiment, the filter 60 may be provided in the space 56, and it goes without saying that the same effect as above can be obtained.

10 Canister 12 Activated carbon (fuel adsorbent)
14 Activated carbon (fuel adsorbent)
1402 Outer peripheral surface 16 Canister case 1602 Upper wall 1604 Lower wall 1606 Side wall 1610 Partition wall 18, 18A Connector 1802 Inner surface 1802A Inner peripheral surface 1802B Inner end surface 1802C Inner end surface 20 Main chamber 22 Auxiliary chamber 24 Tank port 26 Purge port 28 Atmospheric port 2802 Outer surface 30 Connector port 32 Main chamber filter 34 Auxiliary chamber filter 36 First cylindrical portion 3602A Outer peripheral surface 3602B Inner peripheral surface 38 Second cylindrical portion 3802A Outer peripheral surface 3802B Tip surface 40 Annular plate portion 4002A Outer peripheral surface 42 Engaged portion (recess)
44 First seal portion 46 Large diameter cylindrical portion 48 Small diameter cylindrical portion 4802 Flange portion 50 Ring plate portion 5002 Inner surface 52 Fitting portion (protruding portion)
54 Second seal portion 56 Space portions 56A, 56B Space 58 End surface portion 60 Filter 6002 Center hole

Claims (9)

an atmospheric port including a first cylindrical portion protruding from the canister case and having a fitted portion formed therein, and a second cylindrical portion protruding from the first cylindrical portion and having a smaller diameter than the first cylindrical portion,
a connector having a connector port, the connector comprising a fitting portion adapted to be fitted into the fitted portion,
When the fitting portion is fitted into the fitted portion, a space is provided between an outer surface of the second cylindrical portion and an inner surface of the connector.
A canister comprising: the canister case contains activated carbon;
An end of the activated carbon is accommodated in the first cylindrical portion,
a first seal portion is provided to seal between an outer peripheral surface of the end portion of the activated carbon and an inner peripheral surface of the first cylindrical portion in a state where the end portion of the activated carbon is accommodated in the first cylindrical portion;
2. The canister according to claim 1. The activated carbon is held in the canister case with an end of the activated carbon abutting against an end surface inside the first cylindrical portion.
3. The canister according to claim 2. The fitting portion is formed by a recess provided on an outer circumferential surface of the first cylindrical portion and extending in a circumferential direction of the first cylindrical portion,
The first seal portion is provided at a position displaced in the axial direction of the first cylindrical portion with respect to the recess.
4. The canister according to claim 3. When the connector is fitted to the first cylindrical portion, the inner surface of the connector has an inner circumferential surface located radially outward of the outer circumferential surface of the first cylindrical portion,
a second seal portion that seals between an inner peripheral surface of the connector and an outer peripheral surface of the first cylindrical portion is provided at a position displaced in an axial direction of the first cylindrical portion with respect to the first seal portion;
5. The canister according to claim 4. a tip end of the first cylindrical portion and a base end of the second cylindrical portion are connected by an annular plate portion,
The second seal portion seals between an inner circumferential surface of the connector and an outer circumferential surface of the annular plate portion.
6. The canister according to claim 5. When the connector is fitted to the first cylindrical portion, an axial direction of the connector port is different from an axial direction of the second cylindrical portion.
2. The canister according to claim 1. The axial direction of the connector port faces upward.
8. The canister according to claim 7. a dustproof and waterproof filter is provided in a portion of the space that connects the connector port and the second cylindrical portion when the connector is fitted to the first cylindrical portion;
2. The canister according to claim 1.

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