JPH0116687Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a defroster device for a side visibility confirmation window provided at the bottom of a vehicle door, and more particularly to a defroster device that uses a guard bar as a duct for blowing out hot air.

Conventionally, in large vehicles, a side visibility confirmation window has been installed below the normal door window to improve left visibility when turning left, but if the window becomes cloudy due to freezing or condensation, Good lateral visibility could not be obtained, and there was a risk that the effectiveness would be halved. Furthermore, since the window is far from the driving position, it is difficult for the driver to wipe the window while driving, and there is no suitable defroster device.

Furthermore, Japanese Utility Model Application No. 56-174312 discloses an air conditioner for an automobile that blows hot air to an auxiliary window to expand visibility, but the conventional example uses a nozzle at the hot air outlet on the passenger seat. Because it is designed to be rotatable and serve as both the footwell heating for the passenger seat and the defroster for the auxiliary window, it requires constant adjustment and the switching operation to determine the direction is troublesome. When it is necessary to blow hot air toward the auxiliary window when the vehicle is not in use, there is an inconvenience in that the vehicle must be stopped and operated. In addition, since hot air is blown out in spots, there is a drawback that if the auxiliary window is large, a sufficient defrosting effect cannot be obtained. Furthermore, since the hot air outlet and the nozzle hang below the instrument panel, there are problems in that they are a nuisance and the interior of the vehicle does not look good.

The present invention was made to eliminate the drawbacks of the prior art described above, and its purpose is to blow hot air into the guard bar in a side visibility confirmation window provided below a normal door window. By using the window as a duct, it is possible to remove fogging from the window, and to maintain good visibility to the left, especially when turning left of the vehicle. Another purpose is to blow out hot air evenly from the front and back of the window by changing the diameter or pitch of the hot air blowing holes provided in the guard bar, so that the entire surface of the window can be defrosted evenly. .

In short, the present invention provides a side visibility confirmation window provided below a normal door window, in which a guard bar provided along the front and back direction inside the window is formed of a hollow pipe, and the guard bar is provided on the inside of the window in the front-rear direction. A hot air outlet is provided toward the window, a hot air duct that communicates with a hot air source is connected to the hollow pipe when the door is closed, and hot air is blown from the hollow pipe to the side visibility confirmation window. This is a characteristic feature.

The present invention will be explained below based on embodiments shown in the drawings. As shown in Fig. 1, a side visibility confirmation window 5 is provided below a normal door window 4 provided on a door 3 of a cab 2 of a vehicle 1. is hollow pipe 6
A guard bar G consisting of is arranged horizontally.
The hollow pipe 6 of the guard bar is provided with a plurality of hot air blowing holes 7 toward the window 5, as shown in FIGS. 2 and 3. In the first embodiment shown in FIG. 3, the diameter of the warm air blowing holes 7 is changed so that the hole 7 on the upstream side of the hot air flow is the smallest and gradually becomes larger toward the downstream side. This is because the pressure of the hot air decreases each time it passes through one of the hot air blowing holes 7, and if the hole diameter is the same, most of the hot air will blow out from the upstream hole 7.

Further, in order to equalize the amount of hot air blown to the window 5, as in the second embodiment shown in FIG.
Instead of having the same diameter, the pitch P may be set to be larger on the upstream side and smaller as it goes downstream.

It is preferable that the hot air blowing holes 7 are oriented slightly diagonally downward toward the window 5, as shown in FIG.

The window 5 is fixed to the outer panel 9 and inner panel 10 of the door 3 by a weather strip 8, and a hot air duct 11 is connected to the hollow pipe 6 of the guard bar G, and the hot air duct 11 is connected to the door hinge. The hot air duct 12 opens in the vicinity of the hot air duct 12 to face another hot air duct 13 connected to a heater blower (not shown), and is connected to the hot air duct 13 when the door 3 is closed.

Note that since the mounting structure of the guard bar G to the inner panel 10 shown in FIG. 3 is a schematic diagram, this will be explained in more detail with reference to FIG. 5. The trim panel 14 of the door 3 has a bracket 15 with a hollow part 15a.
is attached via the inner panel 10 with screws 16, and the hollow pipe 6 of the guard bar G is press-fitted into the bracket 15. The trim panel 14 is also provided with a ventilation hole 14a, and the groove 11b of one end 11a of the hot air duct 11 is engaged with the similar ventilation hole 10a of the inner panel 10, so that the hot air duct is attached and airtightness is maintained. It's starting to sag.

The present invention is constructed as described above, and its operation will be explained below. When door 3 is closed,
The hot air ducts 11 and 13 are connected to each other and the state shown in FIG. 3 is established, so when the blower is rotated,
Warm air flows as shown by arrow A, and the guard bar G
The hot air enters the hollow pipe 6, flows from the hot air blowing hole 7 on the upstream side to the hot air blowing hole 7 on the downstream side, and is sequentially blown out from the hole toward the window 5 as shown by arrow B. In this case, since the diameter of the hot air blowing holes 7 increases toward the downstream side, hot air is blown out from each hole 7 evenly over the entire surface of the window 5, regardless of the pressure gradient of the hot air, The fog caused by freezing and condensation is defrosted, allowing good visibility.

Furthermore, in the embodiment shown in FIG. 4, the pitch P of the hot air blowing holes 7 decreases toward the downstream side, so that the warm air is blown evenly over the entire window 5.

In Fig. 2, the hot air outlet 7 is connected to the window 5.
It is opened slightly diagonally downward towards the
The warm air is blown downward as shown by arrow B.
The spray is also applied to the lower part of the window 5, and also rises naturally to reach the center and upper part, so that the entire surface is evenly defrosted.

Since the present invention is constructed and operates as described above, the guard bar is used as a hot air duct in the side visibility confirmation window provided below the normal door window. As a result, the fogging of the window can be removed, and the left side visibility can be maintained particularly well when the vehicle turns left. Furthermore, since there is no need to separately provide a warm air duct, the cost is reduced and the view through the window is not obstructed. Furthermore, since we changed the diameter or pitch of the hot air blowing holes provided in the guard bar,
Warm air is blown out evenly from the front and back of the window, creating the effect of evenly defrosting the entire surface of the window.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention, and FIG. 1 is a side view of the main part of the vehicle, FIG. 2 is a vertical sectional view taken in the direction of the arrow - in FIG. figure,
FIG. 4 is a partial cross-sectional view of a guard bar according to a second embodiment of the present invention, and FIG. 5 is an enlarged cross-sectional view showing the mounting structure of the guard bar and the hot air duct. 3 is a door, 4 is a normal door window, 5 is a side visibility confirmation window, 6 is a hollow pipe, 7 is a hot air outlet, 11 and 13 are hot air ducts, and G is a guard bar.

Claims (1)

[Scope of utility model registration request] In a side visibility confirmation window provided below a normal door window, a guard bar provided along the front and back direction inside the window is formed of a hollow pipe, and hot air is blown into the hollow pipe toward the window. A defroster device characterized in that an outlet is provided, a hot air duct that communicates with a hot air source is connected to the hollow pipe when the door is closed, and hot air is blown from the hollow pipe to the side visibility confirmation window. .