JP2001171488A - Washer nozzle for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the field of view when jetting washing liquid to windshield in an automobile and to secure the high adhering point of washing light during high speed travel. SOLUTION: A jet port 10 for jetting washing liquid is formed in a jet 6 mounted being pressed into a nozzle body fitted to a hood of an automobile. The jet port 10 is provided through the tip part dome (the hemispherical surface) of a passage 7 for feeding the washing liquid to the jet 6, in oblong hole shape extending longitudinally at the bottom part of a groove 8 out of grooves 8, 9 cut in cross form at the tip of the jet 6. The jet port 10 is formed in gourd shape constricted at the center in the longitudinal direction by constricted parts 11 projected from both sides, and having symmetric open shape on both sides of the constructed parts 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle washer nozzle for spraying a cleaning liquid in a mist onto a surface to be cleaned such as a windshield of a vehicle.

[0002]

2. Description of the Related Art Usually, a pair of right and left washer nozzles for injecting a cleaning liquid onto a windshield when wiping the windshield with a wiper blade are provided on a hood of an automobile. Conventionally, a washer nozzle has been disclosed in Japanese Patent Publication No. 64-2540 and Japanese Patent Publication No. 2-5813.
No. 9, Japanese Unexamined Patent Publication No. Sho 61-57452 and Japanese Unexamined Utility Model Application Publication No.
The thing disclosed in 2-86265 gazette etc. is known.

[0003] As a method of the washer nozzle, a fluid disk type, a flat spray type, a jet type and the like are known. The fluid disk type sprays the washing liquid onto the windshield at a substantially uniform concentration, and has a disadvantage that the washing liquid that has landed on the windshield blocks the view. In order to avoid this drawback, a flat spray type is one in which the landing area is provided with a concentration distribution of the cleaning liquid so that the central part is sprayed thinly. Although these methods of spraying in the form of mist allow the cleaning liquid to land on a wide area and have a cleaning effect, they have a drawback that the cleaning liquid is blown off by the wind received during running and the water landing rate decreases during high-speed running. The jet type in which the cleaning liquid is jetted in a jet shape has a disadvantage that the cleaning liquid can be jetted to a high position on the windshield even during high-speed running, but cannot be landed on a wide area.

[0004] In the flat spray type, a leading end of a flow passage of the nozzle body through which the cleaning liquid passes is formed on a dome surface, and a long slot-shaped injection port is formed on the dome surface in one direction. The flowing water that has flowed through the flow passage is collected at the central portion on the dome surface, is then ejected from the injection port at a time, and is sprayed in the form of a mist while having a predetermined divergent angle (injection angle) in the longitudinal direction of the injection port. The washing liquid that has landed on the windshield becomes thin at the center and thick at both sides.

[0005]

However, in the conventional flat spray type washer nozzle, although the washing liquid that has landed on the windshield becomes thinner at the central portion, which is the view portion, it is still thin enough to secure the view. It was not. In addition, at the time of high-speed running, there is a problem that the height of the landing point of the cleaning liquid on the windshield is significantly reduced due to the influence of the wind, and it is difficult to sufficiently clean the visible portion of the windshield.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to improve the visibility when the cleaning liquid is sprayed onto the window glass, and furthermore, to set the landing point of the cleaning liquid during high-speed running. An object of the present invention is to provide a washer nozzle for a vehicle which can be secured higher.

[0007]

According to the first aspect of the present invention, there is provided an automobile washer nozzle provided on a vehicle body for spraying a cleaning liquid onto a windshield of an automobile in a spray state. A long-hole-shaped injection port to be provided, and the cleaning liquid is guided to the injection port, and a flow path in which an inner surface of a portion where the injection port is formed is formed in a dome shape, and a longitudinal direction of the injection port is provided. The center is formed in a gourd shape with a narrowed portion for narrowing the opening shape on both sides thereof.

According to a second aspect of the present invention, in the first aspect of the present invention, a groove is formed on the side of the injection port for engaging with a tool for adjusting the direction of the injection port. . (Operation) Therefore, according to the first aspect of the present invention, the cleaning liquid flowing through the flow passage is collected at the center by the dome at the tip of the flow passage, and is then sprayed at once from the injection port. The mist is sprayed in a longitudinal direction at a predetermined divergent angle (spray angle). At the time of this injection, the flow rate distribution is such that the flow rate is small at the center in the longitudinal direction of the injection port and the flow rate is large on both sides in the longitudinal direction because of the throttle portion at the center in the longitudinal direction of the injection port. Accordingly, the flow rate distribution in the longitudinal direction of the injection port is smaller at the center and larger on both sides of the injection port than in the case where there is no restriction section, because the center in the longitudinal direction of the injection port is narrowed by the throttle section.

Further, since the flow rate ratio becomes relatively large on both sides in the longitudinal direction of the injection port, the injection pressure increases, and the injection speed increases, the cleaning liquid is jetted from both sides in the longitudinal direction of the injection port. Therefore, when the cleaning liquid lands on the window glass of the vehicle, the concentration in the central portion, which becomes the field of view, becomes thinner, and the degree of obstruction of the field of view is reduced, while the water landing area is expanded on both sides in the longitudinal direction. In addition, since the cleaning liquid is vigorously injected from both sides in the longitudinal direction of the injection port, the height of the landing point of the cleaning liquid that lands on the window glass during high-speed running is further ensured.

Further, since the injection port has a gourd shape with a constricted portion, the landing area has a substantially circular high flow rate at both ends of the central portion. As a result, since both ends are substantially circular and have a high flow rate, the water can be accurately landed far away from the target water landing point without being affected by the wind.

According to the second aspect of the present invention, the direction of the injection port is adjusted by engaging the tool with the groove.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 2, a pair of left and right flat spray type washer nozzles 2 are provided on a hood 1a as a body of the automobile 1.
The windshield 3 is mounted so as to point to the left and right halves of the windshield 3 as a window glass. The washer nozzle 2 is a washer device 10 mounted on the front of the vehicle body.
0 of the components. The washer device 100 includes a washer tank 101 for storing a cleaning liquid, and a washer pump 103 for sending the cleaning liquid S in the washer tank 101 to the washer nozzle 2 at a predetermined pressure through a hose 102. Washer nozzle 2,
The hose 102, the washer tank 101, and the washer pump 103 constitute a washer device 100.

As shown in FIG. 3, a washer nozzle 2 is a resin nozzle body 4 attached to a bonnet 1a.
And a resin jet 6 fitted into the recess 4 a at the outlet of the flow path 5 formed in the nozzle body 4. The flow path 5 serves as a passage for the cleaning liquid, and the recess 4a has a spherical inner peripheral surface. An outer peripheral surface of the base of the jet 6 is formed in a spherical shape so as to be fitted in the concave portion 4a. For this reason, the jet 6 is mounted so as to be rotatable around its axis in a fitted state pressed into the recess 4a.

The jet 6 has the shape shown in FIGS. The jet 6 has a flow passage 7 which is open at the rear end thereof and extends in a cylindrical shape. The flow path 7 communicates with the flow path 5 when the jet 6 is pressed into the recess 4a. Tip of flow passage 7 (outlet)
Is formed in a hemispherical dome.

The tip of the jet 6 has four extending portions 6a extending so as to be divided into four by cross-shaped grooves 8, 9 cut from the tip end side. A gourd-shaped injection port 10 is formed at the bottom of the groove 8 so that the longitudinal direction thereof coincides with the extending direction of the groove 8 in a state of communicating with the flow passage 7 at the dome portion. As shown in FIG. 6, the central portion in the longitudinal direction of the injection port 10 is narrowed by a pair of throttle sections 11 symmetrically protruding from both sides in the short direction in opposition to each other.

As shown in FIG. 7, the injection port 10 has a gourd shape symmetrical with respect to a center line K passing through the center of the longitudinal width thereof, and the throttle portion 11 bisects the opening of the injection port 10. So that it protrudes. Further, the throttle portion 11 is formed with a curvature that continuously changes from the curvature of the other portion of the injection port 10. The protrusion amount d of the narrowed portion 11 is 0.1 mm or more with respect to the maximum width end of the injection port 10 in the lateral direction.
0 is narrowed by 0.2 mm or more at the center in the longitudinal direction. In the present embodiment, the protrusion amount d is set to 0.13 mm. The cross-shaped grooves 8, 9 are provided for rotating the jet 6 with respect to the recess 4a using a tool such as a screwdriver, and are provided for adjusting the direction of the injection port 10. It does not have any effect at the time.

In the washer nozzle 2 of the flat spray type, the cleaning liquid is sprayed from the injection port 10 in a mist at a predetermined spread angle (spray angle) θ (see FIG. 10A) spreading in the longitudinal direction. The injection angle θ is determined depending on factors such as the diameter of the flow passage 7, the curvature of the dome, the length of the injection port 10 in the longitudinal direction, and the like. In the flat spray type, the flow rate distribution in the spreading direction of the cleaning liquid injected from the injection port 10 needs to take a distribution pattern having two peaks in which the flow rate increases at both ends as shown in a distribution curve A in FIG. . That is, the flat spray type usable condition is that the peak ratio a / b of the maximum peak value a and the minimum peak value b of the distribution curve A shown in FIG. 8 exceeds “3”.

FIG. 9 is a graph showing the relationship between the injection angle θ and the peak ratio a / b. The pattern of this flow distribution depends on the injection angle θ. The distribution pattern is the injection angle θ = 12
At a degree or more, the peak ratio a / b becomes larger than “3” and split so as to have two peaks. Since the injection angle θ normally used in the washer nozzle 2 for an automobile is 45 degrees or less, the range of the injection angle θ = 12 to 45 degrees is the usable range of the flat spray type washer nozzle 2. The setting value of the injection angle θ is particularly preferably in the range of 20 to 40 degrees. In the present embodiment, the injection angle θ is set to about 30 degrees. When the injection angle θ exceeds 45 degrees and further increases, the peak ratio a / b continues to decrease, and in a region where the injection angle θ exceeds a predetermined value, the peak ratio a / b substantially approaches “1”.

Next, the operation of the washer nozzle 2 having the jet 6 will be described. In the horizontal flat spray type, after the jet 6 is press-fitted into the concave portion 4a, the direction of the injection port 10 is adjusted to the horizontal direction in which the longitudinal direction coincides with the vehicle width direction using a tool such as a driver.

The cleaning liquid flowing through the flow path 5 is collected at the center along the dome at the tip of the flow path 7 and then jetted from the jet port 10 at a time. At the time of this injection,
At the center in the longitudinal direction of the cleaning liquid 0, the cleaning liquid is squeezed by the squeezing portion 11 to reduce the flow rate, and the amount squeezed by the squeezing portion 11 flows out of the openings on both sides thereof. Will increase. As a result, compared to the conventional elliptical injection port, the gourd-shaped injection port 10 has a smaller flow rate at the center in the longitudinal direction due to the throttle effect at the center in the longitudinal direction, and the flow rate ratio at both sides in the longitudinal direction. Becomes larger. In addition, since the flow rate on both sides in the longitudinal direction of the injection port 10 is relatively increased, and the injection speed is increased by the increase of the water pressure on both sides, the cleaning liquid is sprayed compared with the conventional elliptical injection port. It is sprayed more vigorously from both longitudinal sides of the mouth 10.

(Comparative Example) Next, a comparative example in which the conventional elliptical jet of the jet and the gourd-shaped jet of the present embodiment are compared will be described. The distribution of flow rate in the spreading direction at the time of injection and the landing point height during running were investigated. Injection pressure is 9
It was set to 8.1 kpa.

The flow rate distribution was determined by setting the distance from the nozzle to the landing surface at 40 cm and measuring the amount of liquid accumulated in each of the trays arranged along the spreading direction on the landing surface. The landing point height was varied with the vehicle speed, and its dependence on vehicle speed was investigated. The distance from the lower end of the windshield 3 to the landing point (the point where the landing was highest) was measured and defined as the landing point height. FIG. 10B and FIG.
The result of (b) was obtained.

FIG. 10B shows the flow rate distribution in the spreading direction of the cleaning liquid that has landed on the windshield 3. This graph shows the flow rate distribution in the spreading direction passing through a point lowered from the nozzle at right angles to the landing surface obtained from the flow rate distribution measurement experiment. A distribution curve A1 indicated by a solid line indicates a jet of this embodiment, and a distribution curve A2 indicated by a chain line indicates a conventional jet. As can be seen from this graph, in the present embodiment in which the injection port 10 has a gourd shape,
Compared with the conventional elliptical injection nozzle, the flow rate in the central part in the spreading direction is halved from 40% to 20%, and the flow rate in the narrow area at both ends is increased from 60% to 80% by that much (note that , The flow rate% is a value corresponding to the area surrounded by the distribution curve). For this reason, as shown in FIG. 10A, the cleaning liquid that has landed is thinner at the center of the water landing area W and thicker at both sides than the conventional one.

FIG. 11 shows the vehicle speed dependency of the landing point height.
The graph of FIG. 11B shows the relationship between the vehicle speed (km / h) obtained from the landing point height experiment and the landing point height. A curve B1 indicated by a solid line indicates the jet of the present embodiment,
A curve B2 indicated by a dashed line indicates that of a conventional jet. According to the present embodiment in which the injection port 10 is formed in a gourd shape, the decrease rate of the landing point height that decreases as the vehicle speed increases is suppressed smaller than that of the conventional elliptical injection port. At the vehicle speed of 100 km / h, L1 =
L2 = 75 mm for 105 mm and the conventional one, and an improvement of about 40% compared to the conventional one was confirmed. For this reason,
As shown in FIG. 10A, the height L1 corresponding to the field of view of the windshield 3 even at a high speed of 100 km / h.
Until the cleaning liquid reaches the surface.

When the washer nozzle 2 is used as a vertical flat spray type, the jet 6 is used with a tool such as a screwdriver, and the direction of the injection port 10 is changed to a vertical direction in which the longitudinal direction is orthogonal to the vehicle width direction. Adjust to When the jet 6 is used in this vertical flat spray type, the flow rate distribution in the spreading direction is more centered than the conventional distribution curve A2 as shown by the distribution curve A1 as shown in FIG. FIG. 12 (a)
As shown in (2), the concentration of the cleaning liquid in the landing area W is thinner at the center and thicker at both ends than in the conventional case. However, since the distance at the upper end is longer than that at the lower end of the landing area W, the concentration of the cleaning liquid is relatively lower at the upper end. Also, even if it is a vertical flat spray type,
Since the injection speed from both sides of the injection port 10 is increased, the landing point height is improved as compared with the conventional one at the time of high-speed running.

As described in detail above, according to the present embodiment,
The following effects can be obtained. ○ The injection port 10 is made into a gourd shape, and the flow rate from the injection port 10 is made smaller at the center in the spreading direction and larger at both sides in the spreading direction.
The concentration of the cleaning liquid in the central part of the landing area where the liquid has landed on the surface can be further reduced, and the visibility at the time of spraying the cleaning liquid can be secured. In addition, since the flow rate on both sides in the spreading direction of the injection port 10 is increased, the injection speed is increased, and the cleaning liquid is jetted more vigorously from both ends of the injection port 10 than in the past. The washing liquid can be made to reach a higher level than the front glass 3.

Since the protrusion amount d of the throttle portion 11 is set to 0.1 mm or more, the cleaning liquid can be sufficiently throttled at the center of the injection port 10 in the spreading direction. Since the throttle portion 11 is formed in a shape that continuously changes the curvature, energy loss during injection can be reduced as much as possible, which can contribute to improvement of the landing point height during high-speed running.

The present invention is not limited to the above embodiment, but may be embodied as follows without departing from the spirit of the invention. The shape of the injection port is not limited to a simple gourd-shaped one. If a similar function and effect according to the injection port of the above embodiment can be obtained, as an example of a gourd-shaped, as shown in FIG. The central portion in the longitudinal direction may be narrowed by the throttle portion 21 until the injection port 20 becomes two holes 20a. According to this configuration, since the jet 6 has the injection port 20 composed of the two holes 20a, the flow rate in the spreading direction of the injection port 20 is smaller at the center and smaller at the both ends than the one having the simple gourd-shaped injection port 10. Can be larger. Therefore, it is possible to secure a view at the time of spraying the cleaning liquid, and to spray the cleaning liquid to a higher position on the windshield 3 during high-speed traveling than the case of the simple gourd-shaped injection port 10.

The shape of the injection port may be a gourd shape other than the above embodiment. For example, the injection port can be formed in the shape shown in FIG. FIG. 14A is an example in which the throttle unit 11 is projected from only one side in the short direction of the injection port 10.
The opening shape is symmetrical on both sides of the diaphragm 11. FIG. 14B is an example in which the projecting positions of a pair of throttle portions 11 projecting from both sides in the short direction of the injection port 10 are shifted in the longitudinal direction, and the openings on both sides sandwiching the throttle portion narrowed by the throttle portions 11. The shape is symmetric (rotationally symmetric). FIG. 14C shows an example in which a gourd-shaped injection port 10 is formed by partially overlapping and inserting two circular holes, and the injection port 10 is formed at the time of resin molding of the jet 6. not,
When the jet 6 is processed to form the injection port 10, the processing method can be simplified.

The window glass for spraying the cleaning liquid by the washer nozzle for automobiles is not limited to the windshield. For example, a washer nozzle may be implemented for the purpose of injecting the cleaning liquid into the rear window. When used for a windshield, it is provided on both the driver's seat side and the passenger's seat side.

The grooves 8, 9 at the front end of the jet 6 and the extension 6a formed by the grooves 8, 9 may be omitted. -The structure which the nozzle main body and the jet were integrally formed may be sufficient.

The invention which has been grasped from the above embodiment and is not described in the claims will be described below together with its effects. ○ The injection port is composed of two holes separated by the throttle section. According to this configuration, the distribution of the flow rate in the spreading direction injected from the injection port can be made sufficiently small at the center and sufficiently large at both ends.

The throttle portion has a curvature that is continuous with the curvature of the portion other than the throttle portion of the injection port. According to this configuration, energy loss when the cleaning liquid is squeezed by the squeezing portion of the injection port can be reduced.

The injection angle is set in the range of 20 to 40 degrees. According to this configuration, the distribution of the flow rate in the spreading direction injected from the injection port can be made sufficiently small at the center and sufficiently large at both ends.

The washer nozzle for an automobile has a jet provided with the injection port and the flow passage, and a flow passage through which the jet is rotatably fitted around an axial direction and sends a cleaning liquid to the flow passage. And a nozzle body attached to the vehicle body. According to this configuration, the jet fitted to the nozzle body is rotated around its axis to adjust the direction of the injection port, so that the jet can be used in either a horizontal type or a vertical type of a flat spray type.

[0036]

As described above in detail, according to the invention described in each of the claims, the throttle formed at the center in the longitudinal direction of the injection port formed in the dome of the flow passage so that the opening shapes on both sides thereof are symmetrical. By reducing the flow rate at the center in the longitudinal direction of the injection port and reducing the flow rate at both sides in the longitudinal direction, the visibility from the window glass when spraying the cleaning liquid can be improved, and at high speed traveling The height of the landing point of the cleaning liquid can be secured higher. According to the second aspect of the invention, the direction of the injection port can be rotationally adjusted by engaging the tool with the groove.

[Brief description of the drawings]

FIG. 1 is a perspective view of a jet according to one embodiment.

FIG. 2 is a front side view of the automobile.

FIG. 3 is a side sectional view of a washer nozzle.

FIG. 4 is a sectional view of the jet taken along the line II-II of FIG. 1;

FIG. 5 is a sectional view of the jet taken along line III-III in FIG. 1;

FIG. 6 is a front view of the jet.

FIG. 7 is a front view of an injection port.

FIG. 8 is a flat spray type flow distribution pattern diagram.

FIG. 9 is a graph showing a relationship between an injection angle and a peak ratio.

10A is a schematic diagram showing a concentration distribution in a landing area in a horizontal flat spray type, and FIG. 10B is a graph showing a flow rate distribution in a spreading direction.

11A is a schematic diagram of a comparative example of a landing point height during high-speed running, and FIG. 11B is a graph showing a relationship between a vehicle speed and a landing point height.

12A is a schematic diagram showing a concentration distribution in a landing area in a vertical flat spray type, and FIG. 12B is a graph showing a flow rate distribution in a spreading direction.

FIG. 13 is a front view of a jet having another injection port.

FIG. 14 is a front view of another injection port.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Car, 1a ... Bonnet as a vehicle body, 2 ... Washer nozzle, 3 ... Wind glass as a window glass, 4 ... Nozzle body, 5 ... Flow path, 6 ... Jet, 7 ... Flow path, 10, 20 ... Injection port, 11, 21,... Squeezing section, 10
0: Washer device, 101: Washer tank, 10
3 ... Washer pump.

Claims (2)

[Claims] An automobile washer nozzle provided in a vehicle body for spraying a cleaning liquid onto a window glass of an automobile in a spray state, wherein a long hole-shaped injection port through which the cleaning liquid is injected, and the cleaning liquid are guided to the injection port. And a flow passage in which the inner surface of the portion where the injection port is formed is formed in a dome shape, and a throttle portion that narrows the longitudinal center of the injection port so that the opening shape is symmetrical on both sides thereof is provided. A washer nozzle for an automobile characterized by being formed in a gourd shape. 2. The vehicle washer nozzle according to claim 1, wherein a groove is formed on the side of the injection port to be engaged with a tool for adjusting the direction of the injection port.