JPS59109266A - Injection type washing device of head lamp for vehicle - Google Patents

Abstract

PURPOSE:To wash away concentrically the sludge sticking on a head lamp lens at the suppressed angle and rate of injection by forming a nozzle in such a way that a washing liquid is sprayed in a pattern of sector shape. CONSTITUTION:A discharging part having a notch angle alpha and a notch depth (d) when viewed from the lateral section is provided to the semispherical top end of a nozzle 2 having internally a hole. High injection force is obtd. with a uniform pressure distribution if the discharging part is formed to a sector shape wherein the angle alpha is set at 60 deg. and the depth (d) at 0.5mm.. A washing liquid is sprayed toward the surface of a head lamp lens at an incident angle 30 deg. of injection, whereby high washing performance is obtd.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an injection type headlamp cleaner cleaning device for a vehicle, and in particular, in order to improve the cleaning effect, the spray angle and amount of spray from a nozzle are suppressed and concentrated. The present invention relates to a vehicle injection type headlamp cleaner cleaning device suitable for cleaning sludge adhering to headlamp lenses.

[Prior art]

In conventional spray headlamp cleaner cleaning devices, the nozzle spray angle was 60° to 80° and the spray pattern was a full cone type or an empty cone type, so the cleaning liquid sprayed onto the headlamp lens was The cleaning liquid particles are dispersed before impacting the lens, and the cleaning liquid particles are further atomized by air resistance, and the cleaning efficiency is particularly low when it comes to dry or caked-on dirt such as mud that has adhered to the headlamp lens surface. It is extremely low, and water is simply being added to the sludge adhering to the lens. For this reason, there was a drawback in that it created a condition in which mud and dust were more likely to adhere.

[Purpose of the invention]

An object of the present invention is to provide a vehicle injection headlamp cleaning device that can improve cleaning performance.

[Summary of the invention]

The present invention minimizes the phenomenon of atomization of cleaning liquid particles due to air resistance by making the spray pattern flat (fan-shaped), and improves cleaning performance by concentrating the energy of the cleaning liquid that collides with the headlamp lens. This is what we are trying to do. In other words, it has been known for a long time that the ability to remove mud adhering to a headlamp using a spray cleaning method is proportional to the amount of collision energy per unit area of the headlamp lens of the cleaning liquid particles sprayed and collided with the lens surface. ing. Therefore, in the present invention, the jetting pattern of the nozzle for a headlamp cleaning device is changed from the conventional full cone type to a flat (fan-shaped) type, thereby concentrating the jetting energy.

[Embodiments of the invention]

Examples of the present invention will be described below.

FIG. 1 shows an embodiment of the invention.

In the figure, an injection device 10 is provided on a bumper 4 on the front side of a headlamp 1. This injection device 10 is composed of an injection liquid transport pipe 3 and a nozzle 2. This cleaning liquid transport pipe 3 is formed of an elastic tube. Further, this nozzle 2 has a configuration as shown in FIGS. 2 and 3.

FIG. 2 is a front view, and FIG. 3 is a side sectional view. The cutting angle of this nozzle is α and the cutting depth is dl, and the characteristics of this nozzle will be explained using FIGS. 4 and 5.

FIG. 4 shows a pressure distribution diagram for the parameters shown in FIG. 4, and measurement results with the horizontal direction as the X axis for the cleaning liquid 5 that forms a fan-shaped spray pattern sprayed from the nozzle 2 in the positional relationship shown in FIG. 6. FIG. 4 shows changes in cutting depth d, and FIG. 5 shows changes in cutting angle α. Here, d at each α in FIG. 5 was measured at a predetermined value in order to keep the area A of the discharge portion shown in FIG. 2 constant. As is clear from FIGS. 4 and 5, the values of α=60° and d=0.5 IDI show a uniform pressure distribution and a pattern with high injection force can be obtained.

Since it is configured in this way, the cleaning liquid transport pipe 3
The cleaning liquid 5 that has passed through is jetted from the nozzle 2 and collides with the headlamp 1. This cleaning liquid 5 is sprayed in a fan shape, and the cross-sectional area of the cleaning liquid 5 is smaller than that of a conical shape, etc., but if the injection angle of incidence with respect to the lens surface of the nozzle is set to a predetermined value, the cross-sectional area can be increased. As shown in FIG. 7, the cleaning liquid 5a moves upward along the lens surface.
As the washing g5b moves downward, it spreads out and a wider washing area can be obtained.

FIG. 8 shows the position of each component in FIG. 1.

In the figure, the distance from the nozzle to the center of the headlamp lens is θ, and the angle between the jet center line and the lens surface is θ.
The figure is in the above figure 2) θ=5 for L=100m
0°, 40°, 30°.

FIG. 7 shows the change in cleanability when changing the angle by 20° and 10°. Here, the luminous intensity recovery rate η on the vertical axis indicates the ratio between the value at which the luminous intensity of the headlamp decreases due to mud adhering to the headlamp and the luminous intensity of the headlamp after spray cleaning.

As is clear from Figure 9, the nozzle of the present invention has a fan-shaped spray pattern and uses a method that concentrates the spray energy, which is better than the method of diffusing the spray energy of the current product's full cone and empty cone spray patterns. The cleaning performance is much improved, especially when the injection angle θ is around 30°, the cleaning performance is 5 to 6 times higher. In FIG. 9, the nozzle of this embodiment shows the best luminous intensity recovery rate when the injection angle is 30 degrees.
It can be judged that the cleaning performance is high. In the future, even if the headlamp lens shape of both heavy vehicles is square and the lens surface is flat, and the headlamp lens surface tends to be more inclined, the product of the present invention will be the 9th one.
As is clear from the experimental results shown in the figure, it is possible to obtain high cleaning performance.

Therefore, according to this embodiment, in order to solve the problem of the current nozzle's poor cleaning performance, the cleaning liquid sprayed from the nozzle is intensively sprayed in a fan-shaped spray pattern to collide with the headlamp lens surface, so that it can be used while actually driving. Even with adhered sludge that is difficult to remove, the cleaning performance is significantly improved, and the above-mentioned problem is simply solved. Also, set the nozzle position to the lower side of the headlamp (
To explain this with reference to FIG. 8, since the spray is carried out at a jet angle of 1, = 100 yen, θ = 400 or less), there is no risk of interfering with the light projection performance of the headlamp, and more powerful cleaning than the conventional spray cleaning method is possible.

〔Effect of the invention〕

As explained above, according to the present invention, cleaning performance can be improved.

[Brief explanation of the drawing]

Fig. 1 is a state diagram of the headlamp lens surface being sprayed and cleaned using the nozzle of the present invention, Fig. 2 is a front view of the nozzle of the present invention, Fig. 3 is a side sectional view of Fig. 2, Figs. The figure is a pressure distribution diagram in the jetting state of the nozzle of the present invention, Figure 6 is a diagram showing the jetting state of the nozzle of the present invention, Figure 7 is a three-dimensional view of Figure 1, and Figure 8 shows the positional relationship in Figure 1. 9 are diagrams showing the luminous intensity recovery rates of this example and the conventional product. 1...Headlamp, 2...Nozzle, 3...Cleaning liquid transport SonoM So May SoiM J Author 7M 嬶家人@Kakuθ.

Claims (1)

[Claims] 1. In a vehicle headlamp cleaning device that sprays cleaning liquid such as water from the front of a vehicle headlamp through a cleaning nozzle to clean the headlamp, the cleaning nozzle has a hemispherical tip having an internal hole, ■A spray-type headlamp cleaning device for a vehicle characterized by having a letter-shaped notch.