JPH0554020U - Ventilator for vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a ventilator for a vehicle that can be used as a duct body for general districts and dust districts in common, and has an excellent dust inflow prevention effect. [Structure] A duct outer 2, a duct body 1, and a butterfly 3 that is openably and closably attached to an opening 10 of the duct body 1, and a sealing surface portion 11 for contacting a lower end surface of the butterfly 3 with the duct body 1. Is provided. The seal surface portion 11 has an extended seal surface 110 extending in an L shape along the butterfly 3. A cutout 111 is provided below the extended sealing surface 110. In addition, the butterfly 3
A magnetic material is mixed if necessary. As a result, the duct body 1 for the general area and the dust main area can be shared, and the dust inflow prevention effect is excellent.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a ventilator for a vehicle, which has an excellent effect of preventing dust inflow because it can be used as a duct body for general districts and dust districts.

[0002]

[Prior art]

 As shown in FIGS. 5 and 9, a conventional vehicle ventilator includes a duct outer 2, a duct body 9, and a butterfly 3 that is openably and closably attached to an opening 90 of the duct body 9. Further, the duct body 9 has a sealing surface portion 99 with which the lower end surface 31 of the butterfly 3 is brought into contact. The outer duct 2 is attached to the duct body 9 by a locking grommet (not shown). As shown in FIG. 9, the vehicle ventilator is arranged in the vicinity of the rear bumper 6 of the automobile and discharges the air on the indoor side C to the outside D of the vehicle due to the difference in the wind pressure between the indoor and outdoor sides. Therefore, the butterfly 3 is attached to the opening 90 of the duct body 9 so as to be opened and closed by its own weight due to a slight air pressure difference between the air on the indoor side C and the air on the vehicle outside D 1. Further, as shown in FIG. 9, in the vehicle ventilator, the butterfly 3 is always in contact with the sealing surface 99 of the duct body 9, so that minute dust outside the vehicle and dust 73 such as exhaust gas discharged from the exhaust pipe. Are prevented from flowing into the vehicle.

Further, the vehicle ventilator is attached to the body outer plate 5 near the bumper 6 via a sealing packing 4 as shown in FIG. The butterfly 3 is required to have bending characteristics and opening / closing response. For this reason, it is composed of a rubber elastic body such as chloroprene rubber (CR), which has excellent elasticity. When magnetism is required, iron powder such as ferrite is mixed in the rubber elastic body. Since the duct outer 2 and the duct body 9 are required to be lightweight and durable, they are made of durable plastic such as polypropylene resin or polyethylene resin.

By the way, the above-mentioned vehicle ventilators include those for high dust areas and those for general areas. As shown in FIG. 8, the above-mentioned one for the dusty area has a magnetic body 98 on the sealing surface 99, and is often used for an automobile running in an area having a relatively large amount of dust. In this case, the butterfly 3 having magnetism is brought into close contact with the magnetic body 99 to exert the effect of preventing dust inflow. On the other hand, for the above general area, as shown in FIG. 7, the sealing surface 99 does not have a magnetic material. It is used in vehicles that drive in areas with relatively clean air and low dust. In this general area type, the butterfly 3 comes into close contact with the seal surface portion 99 due to its own weight. Reference numeral 95 in FIGS. 5 and 9 indicates a water repelling portion in which a dam is formed, and reference numeral 21 indicates a rear end surface of the duct outer grill.

[0005]

[Problems to be solved]

 However, the above conventional technique has the following problems. That is, in the conventional vehicle ventilator, the duct main body for the heavy dust area and the duct main body for the general area vehicle have the dedicated duct main bodies 91 and 92, respectively, as shown in FIGS. Need to create. That is, as shown in FIG. 7, the duct body 91 for the general district does not have a magnetic material on the sealing surface portion 99.

On the other hand, since the duct main body 92 for the heavy dust area has the magnetic body 10 on the sealing surface 99 as shown in FIG. 8, it is necessary to have a structure different from that of the duct main body 91 for the general area. .. In addition, it is necessary to separately prepare the butterfly 3 in which a magnetic substance such as iron powder is mixed in order to impart magnetism. As a result, the number of parts of the duct bodies 91 and 92 and the butterfly 3 increases, and the cost increases. Also, since the duct body occupies a large volume in a vehicle ventilator, it is difficult to manufacture and store the duct bodies for the general district and the dusty district separately.

Further, when the butterfly 3 has a small weight, the adhesion to the seal surface 99 may be deteriorated, and the dust inflow prevention effect may be reduced. The present invention has been made in view of the above conventional problems, and it is an object of the present invention to provide a ventilator for a vehicle that can be used as a duct body for general districts and for dusty districts in common, and has an excellent dust inflow prevention effect. To do.

[0008]

[Means for solving the problem]

 The present invention has a duct outer, a duct main body, and a butterfly that is openably and closably attached to an opening of the duct main body, and the duct main body is provided with a sealing surface portion for abutting a lower end surface of the butterfly. In the ventilator for a vehicle, the seal surface portion has an extended seal surface extending in an L shape along a butterfly, and a cutout portion is provided in a part of the extended seal surface. Located in the vehicle ventilator. What is most noticeable in the present invention is that the sealing surface portion has an extended sealing surface extending in an L shape along the butterfly, and a cutout portion is provided in a part of the extending sealing surface. It is in.

The extended sealing surface is formed by extending a surface of the butterfly, which comes into contact with the duct body, in an upward L-shape. Further, the notch has an elongated concave shape, as shown in, for example, Example 1, and is provided substantially below or above the extended sealing surface (see FIG. 3). The duct body and the duct outer are made of, for example, a lightweight and highly durable polypropylene resin, polyethylene resin, acrylonitrile-butadiene-styrene resin (ABS).

Further, as shown in Examples 1 and 2, the butterfly is made of an elastic body such as chloroprene rubber (CR) having excellent bending characteristics and opening / closing response. Then, the butterfly for the high dust area is provided with magnetic attraction. Therefore, it is preferable to mix magnetic material such as ferrite iron powder in the butterfly. Others are the same as the conventional one. It is preferable to dispose a magnetic body such as a magnet piece in the cutout portion of the extended sealing surface as shown in the second embodiment. Correspondingly, a magnetic material such as iron powder is mixed into the butterfly to make it a magnetic material. This makes it possible to construct a ventilator for high-dust areas with excellent dust inflow prevention effects.

[0011]

[Action and effect]

 In the ventilator for a vehicle of the present invention, an extended seal surface extending in an L shape along the butterflies is formed on the seal surface portion of the duct body, and a cutout portion is provided in a part of the extended seal surface. Become. For this reason, in a vehicle ventilator for general areas, the duct body and butterfly etc. are assembled as they are without arranging a magnetic material in the cutout. On the other hand, in a vehicle ventilator for heavy dust areas, a magnetic material is placed in the above-mentioned notch in the duct body and assembled as described above.

As described above, in the present invention, the same duct main body can be commonly used in the vehicle ventilator for the general district and the dusty district only by the presence or absence of the above magnetic material. As a result, the number of parts is reduced, management and storage becomes easier, and costs can be reduced. Further, the sealing surface portion with which the butterfly abuts, as described above, forms an extended sealing surface which extends along the butterfly in an L-shaped pattern. Therefore, the adhesion between the butterfly and the extended sealing surface is improved, and the dust inflow prevention effect is excellent. As described above, according to the present invention, it is possible to provide a vehicle ventilator that can be used in both general districts and heavy dust districts and has an excellent dust inflow prevention effect.

[0013]

Embodiment 1 A vehicle ventilator according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 3, the vehicle ventilator of this example has a duct outer 2, a duct main body 1, and a butterfly 3 that is openably and closably attached to an opening 10 of the duct main body 1. The main body 1 is provided with a seal surface portion 11 for contacting the lower end surface 31 of the butterfly 3.

The seal surface portion 11 has an extended seal surface 110 extending in an L shape along the butterfly 3, and a cutout portion 111 is provided in a lower half of the extended seal surface 110. The extended sealing surface 110 is formed by extending upward in an L-shape so as to increase the area of the sealing surface portion where the butterfly 3 contacts the duct body 1. The notch portion 111 has an elongated concave groove portion below the extended sealing surface 110, and has a shape such that a magnet piece or the like can be easily attached.

The duct body 1 and the duct outer 2 are made of polypropylene resin, which is lightweight and has excellent durability. The duct body 1, the extended sealing surface 110, and the notch 111 are simultaneously formed by injection molding. Therefore, it is easy to manufacture and inexpensive. The butterfly 3 is made of chloroprene rubber (CR), which has excellent bending characteristics and opening / closing response.

Further, as shown in FIG. 2, the butterfly 3 has a boss portion 22 provided at a tip end portion of the duct outer 2 fitted and fitted in a locking hole 30 thereof. As a result, the detachability of the butterfly 3 is excellent. Others are the same as the conventional one. Next, the function and effect will be described. In the vehicle ventilator of this example, an extended seal surface 110 extending in an L shape along the butterfly 3 is formed on the seal surface portion 11 of the duct body 1, and a part of the extended seal surface 110 is formed. A notch 111 is provided.

Therefore, in the vehicle ventilator for general districts, as shown in FIG. 3, the magnetic body 12 (FIG. 4) is not provided in the notch 111, and the duct body 1 and the butterfly 3 are used as they are. Etc. Further, the seal surface portion 11 with which the butterfly 3 comes into contact forms an extended seal surface 110 extending in an L shape along the butterfly 3 as described above.

Therefore, the area of the extended seal surface 110 with which the butterfly 3 contacts increases. As a result, the adhesion between the butterfly 3 and the extended sealing surface 110 is improved, and the dust inflow prevention effect of the butterfly 3 is improved. As described above, according to this example, the duct main body for the general area and the duct area for the heavy dust area can be shared, and the vehicle ventilator excellent in the dust inflow prevention effect can be obtained.

Embodiment 2 In this embodiment, as shown in FIG. 4, the duct body 1 is provided with the magnetic body 12 arranged in the notch 111 of the extended sealing surface 110 in Embodiment 1 above. Others are the same as the conventional one. As the magnetic body 12, a strip-shaped magnet piece having a strong magnetic force is used. Then, the magnetic body 12 is bonded to the notch 111 using an adhesive. Thereby, the magnetic body 12 can be easily joined to the notch 111 of the extended sealing surface 110.

On the other hand, the butterfly 3 is mixed with magnetic iron powder such as nickel ferrite and manganese ferrite in order to facilitate magnetic attraction to the magnet pieces. As a result, it has strong magnetism and has a larger specific gravity than the butterfly 3 that does not contain the magnetic iron powder.

Further, in the ventilator for a vehicle in the heavy dust area, as shown in FIG. 4, the magnetic body 12 is disposed in the cutout portion 111 of the duct body 1 and assembled as described above. As described above, in this example, the same duct body 1 can be commonly used for the vehicle ventilator for the general district and the dusty district only by the presence or absence of the above magnetic material. As a result, the number of parts is reduced, management and storage becomes easier, and costs can be reduced.

Therefore, the adhesion of the butterfly 3 to the magnetic body 12 is further improved as compared with the first embodiment. As a result, it is possible to reliably prevent minute dust and exhaust gas outside the vehicle from flowing back into the inside of the vehicle. As described above, according to this example, the duct main bodies for the general district and the Tama district can be shared, and the duct main body 1 suitable as the vehicle ventilator for the heavy dust district can be obtained. In addition, the same effect as that of the first embodiment can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a vehicle ventilator according to a first embodiment.

FIG. 2 is a cross-sectional view showing a state where the duct body and the butterfly are mounted in the vehicle ventilator according to the first embodiment.

FIG. 3 is a cross-sectional view of main parts of the vehicle ventilator according to the first embodiment.

FIG. 4 is a sectional view of a main part of a vehicle ventilator according to a second embodiment.

FIG. 5 is a development view of a conventional vehicle ventilator.

FIG. 6 is a perspective view of a main part of a conventional vehicle ventilator.

FIG. 7 is a cross-sectional view of a main part of a conventional ventilator for vehicles for general districts.

FIG. 8 is a cross-sectional view of a main part of a conventional vehicle ventilator for a heavy dust area.

FIG. 9 is a cross-sectional view of a conventional vehicle ventilator.

[Explanation of symbols]

 1. ． ． Duct body, 11. ． ． Sealing surface portion, 12. ． ． Magnetic material, 110. ． ． Extension sealing surface, 111. ． ． Notch, 2. ． ． Duct outer, 3. ． ． butterfly,

Claims (2)

[Scope of utility model registration request] 1. A duct outer, a duct main body, and a butterfly that is openably and closably attached to an opening of the duct main body, wherein the duct main body is provided with a seal surface portion for contacting a lower end surface of the butterfly. In the vehicle ventilator described above, the seal surface portion has an extended seal surface extending in an L shape along the butterfly, and a cutout portion is provided in a part of the extended seal surface. Ventilator. 2. The ventilator for a vehicle according to claim 1, wherein a magnetic body for magnetically attracting the lower end surface of the butterfly is arranged in the cutout portion of the extended sealing surface.