JP2577674Y2 - Automotive electronics - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle electronic device mainly mounted on a console box of a vehicle, such as an in-vehicle cassette tape player or an in-vehicle CD player, and particularly has a heat radiating hole on an upper surface. The present invention relates to a structure for preventing liquid from entering a housing.

[0002]

2. Description of the Related Art FIG. 6 is a perspective view showing a conventional in-vehicle cassette tape player, and FIG. 7 is a side view, partially in section, showing a state in which the in-vehicle cassette tape player is mounted on a mounting plate of a vehicle. In the figure, reference numeral 21 denotes a hollow chassis (housing) formed in a substantially box shape from a metal plate or the like, and various operation buttons 22a, 22b, 22c and a display unit 22 are provided at the front end thereof.
A nose 22 with d is attached. Inside the chassis 21, a cassette reproducing mechanism section 23, a heat-generating component 24 used for an amplifier circuit, and the like are mounted on a printed circuit board 25.
It is attached to and provided.

Further, heat radiating holes 21b, 21b,... Communicating with the internal space are formed in the upper surface 21a of the chassis 21 so that heat generated from the heat generating components 24 is radiated out of the chassis 21. . The in-vehicle cassette tape player 20 having the above-described configuration is provided with an opening 31 provided in a mounting plate 31 such as a console box of a vehicle as shown in FIG.
The entire chassis 21 is immersed in a, and only the nose 22 is fixed to the mounting plate 31 in a state of being exposed on the front surface.

[0004]

However, as described above, the heat radiating holes 21b and 21b are formed on the upper surface 21a of the chassis 21.
In the cassette tape player 20 for vehicles having b,..., for example, when a driver or a passenger of the vehicle accidentally spills a liquid such as drinking water on the upper surface side of the nose 22, the liquid is 31a, flows into the upper surface 21a of the chassis 21, and further radiates holes 21b, 21b,.
The electronic components such as the heat-generating component 24 are short-circuited to the inside of the chassis 21, and the mechanical components such as the cassette reproducing mechanism 23 are corroded.

The present invention has been made in view of the above-mentioned problem. Even when a liquid flows into the upper surface 21a of the chassis 21, the liquid enters the inside of the chassis 21 through the heat radiation holes 21b, 21b,. And to prevent a failure of the electronic device.

[0006]

According to the present invention, a nose having an operation portion or a display portion is attached to a front end of a casing having a heat radiating hole on an upper surface, and the casing is mounted on a vehicle. In the in-vehicle electronic device fixed in a state of being immersed in the opening of the mounting plate, a step portion for preventing liquid from entering the heat radiation hole is provided on the upper surface of the housing in front of the heat radiation hole. It is a thing.

[0007]

According to the above-mentioned means, even if liquid flows into the upper surface of the housing from the opening of the mounting plate of the vehicle, the liquid is blocked by the step provided on the front side of the heat radiation hole of the housing. Since it does not enter the heat radiating hole any more, it is possible to prevent the liquid from entering the inside of the housing from the heat radiating hole, and it is possible to prevent the breakdown of the device.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an in-vehicle cassette tape player according to one embodiment of the present invention, and FIG. 2 is a side view showing a state in which the in-vehicle cassette tape player is mounted on a mounting plate of a vehicle in a partial cross section. .

Reference numeral 1 in the drawing denotes a hollow chassis (housing) formed in a substantially box shape from a metal plate or the like. At the front end of the chassis 1, various operation buttons 2a, 2b, 2c, a display unit 3 using a liquid crystal display element, and a nose 5 having a cassette insertion slot 4 are attached. As shown in FIG. 2, inside the chassis 1, electronic components such as a cassette reproducing mechanism 6 and a heat generating component 7 forming an amplifier circuit are mounted on a printed circuit board 8 and provided.

A large number of radiating holes 1b, 1b,... Communicating with the internal space are formed in the upper surface 1a of the chassis 1 to radiate mainly heat generated from the heat generating components 7 to the outside of the chassis 1. The inside of the chassis 1 is constantly cooled.
Note that the heat radiation hole 1 is similarly provided on the upper side of the side surface 1c of the chassis 1.
d and 1d are drilled. Further, the side surface 1c is provided with screw holes 1e, 1e used when being fixed to the vehicle.

Further, the heat radiation hole 1 on the upper surface 1a of the chassis 1
b, 1b, ..., on both sides 1 of the chassis 1
A long groove (step portion) 1f extending between c and 1c is formed by press working or the like. Further, on both side surfaces 1c, 1c, grooves 1g extending in the vertical direction continuously from the long grooves 1f are provided (only one groove 1g is shown in FIG. 1).

As shown in FIG. 2, the on-vehicle cassette tape player 10 having the above-described structure has the entire chassis 1 immersed in an opening 11a provided in a mounting plate 11 of a console box or the like of a vehicle, and only the nose 5 is attached to the mounting plate 11. Is fixed by screws or the like in a state of being exposed on the front surface. still,
The mounting plate 11 of the vehicle is generally provided not vertically but slightly inclined. Therefore, the cassette tape player 10 for a vehicle is usually fixed with a slight inclination so that the front side thereof is at a high position.

In this mounted state, for example, if a driver or a passenger of the vehicle accidentally spills a liquid such as drinking water on the upper surface of the nose 5, the liquid flows from the opening 11a of the mounting plate 11 to the chassis 1. Although it flows on the upper surface 1a and further advances to the rear side of the chassis 1, it does not flow any further rearward because of the long groove 1f. And the long groove 1
f into the groove 1g on the side surface 1c of the chassis 1.
And falls below the in-vehicle cassette tape player 10. Therefore, there is no problem that the liquid enters the chassis 1 through the heat radiation holes 1b, 1b,.

In the above embodiment, the side surface 1c of the chassis 1
Is provided with a groove portion 1g continuous with the long groove 1f, so that the liquid flowing out from the long groove 1f to the side surface 1c allows the heat radiation holes 1d, 1d.
And the screw holes 1e, 1e can be prevented from entering the chassis 1 at the same time.

In the above embodiment, the long groove 1f linearly extending between the side surfaces 1c and 1c on the upper surface 1a of the chassis 1 has been described. However, the shape of the long groove 1f is not always required to be linear. As shown in FIG. 3, a long groove (step portion) 1h surrounding not only the front side of the heat radiation holes 1b, 1b,... On the upper surface 1a of the chassis 1 but also the entire heat radiation holes 1b, 1b,.

Further, in FIG. 1 to FIG.
The heat radiating holes 1b, 1b, 1b,.
Although a long groove is provided in front of 1b,..., A ridge (step portion) 1 is used instead of the long groove as shown in FIG.
If i is provided, the intrusion of the liquid can be similarly prevented. Although FIG. 4 shows the case where the ridge 1i is provided integrally by forming the chassis 1 by drawing, the same effect can be obtained even if a projecting member is attached separately from the chassis 1. Nor.

As shown in FIG. 5, the surface 1j of the upper surface 1a of the chassis 1 on which the heat radiation holes 1b, 1b,... (Step) The same effect can be obtained by forming 1 m.

[0018]

As described above, according to the present invention, a step portion for preventing liquid from entering into the heat radiation hole is provided in front of the heat radiation hole provided on the upper surface of the housing. Even when the liquid flows into the upper surface of the housing from the opening of the mounting plate of the vehicle, the liquid can be prevented from entering the housing from the heat radiating hole, so that the liquid may enter the inside of the housing from the heat radiating hole. Can be reliably prevented, and a failure of the vehicle-mounted electronic device can be prevented beforehand.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an on-vehicle cassette tape player according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view showing a state in which the on-vehicle cassette tape player according to one embodiment of the present invention is mounted on a mounting plate of a vehicle.

FIG. 3 is a perspective view showing a cassette tape player for vehicle according to another embodiment of the present invention.

FIG. 4 is a partial cross-sectional side view showing a state in which a vehicle-mounted cassette tape player according to still another embodiment of the present invention is mounted on a mounting plate of a vehicle.

FIG. 5 is a side view, partially in section, showing a state where a vehicle-mounted cassette tape player according to still another embodiment of the present invention is mounted on a mounting plate of a vehicle.

FIG. 6 is a perspective view showing a conventional in-vehicle cassette tape player.

FIG. 7 is a partial cross-sectional side view showing a state where a conventional on-vehicle cassette tape player is mounted on a mounting plate of a vehicle.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Chassis (housing) 1a Upper surface 1b Heat radiating hole 1f, 1h Long groove (step) 1i Ridge (step) 1m Step (step) 2a, 2b, 2c Operation button 3 Display 5 Nose 10 In-vehicle cassette tape player 11 Mounting plate 11a Opening

Claims (1)

(57) [Scope of request for utility model registration] 1. A nose having an operation unit or a display unit is attached to a front end of a housing having a heat radiation hole on an upper surface,
In a vehicle-mounted electronic device in which the housing is fixed in a state of being immersed in an opening of a mounting plate of a vehicle, liquid is prevented from entering the heat dissipation hole on the upper surface of the housing in front of the heat dissipation hole. An electronic device for a vehicle, comprising a step portion for performing the operation.