JPH0999812A - Squeegeeless rain wiper device for automobile front window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for wiping deposited water droplets by a front window itself without a squeegee when rain water droplets splashed on an automobile front window glass. SOLUTION: A transparent lower electrode 3 and transparent band electrodes 4a, 4b are located across a transparent piezoelectric strain material plate 2 to be given voltage with a number of phases shifting and moving from time to time by a phase voltage generation part 7, piezoelectric strain effect between the electrode and the piezoelectric strain material plate is used to cause waves on the surface of the piezoelectric strain material plate, as if they would move on the surface of a sea, and the effect of a transparent hydrophobic material film 6 is additionally applied to wipe water droplets. A number of band electrode shapes for the transparent upper electrode and a number of band electrode shapes for the transparent lower electrode are constructed crossing each other and upper and lower electrode phase generation parts are provided, so that the speed of an automobile is detected, the movement of waves is controlled by a rain transportation control part and the effect of wiper is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for wiping raindrops such as rain on the windshield of a vehicle while driving the vehicle.

[0002]

2. Description of the Related Art A conventional windshield windshield wiper for automobiles wipes raindrops attached to the windshield during operation by moving a squeegee in a circular arc on the windshield by electric motor power. The squeegee obstructs the field of view, the squeegee rubber is worn out and is difficult to replace, and the squeegee is protruding, which impairs the functional beauty of the car.

[0003]

DISCLOSURE OF THE INVENTION The present invention eliminates a squeegee, wipes water drops adhering to the front window itself, eliminates extra protrusions on the front window, improves visibility and improves safety, and Provides the streamlined functional style beauty of the car.

[0004]

The mechanism of the present invention in FIG. 1 will be described. This figure illustrates a cross section AA of the windshield of the present invention installed in the automobile 1.
In particular, in this mechanism diagram, a transparent wide electrode 3 having a single wide lower electrode shape is sandwiched between the transparent piezoelectric strain material flat plates 2 and a large number of transparent strip electrodes 4a, 4
b, 4c, 4d, 41a, 41b, 41c, 41d, etc. are formed as upper electrodes, and a transparent hydrophobic material film 6 made of a transparent hydrophobic material is formed on the surface of the upper electrode on which the rainwater droplets 5 hit. It is a mechanical structure to be formed. A large number of transparent upper strip electrodes 4a, 4b, 4c, 4d, 41a,
41b, 41c, etc. are connected to the phase voltage generating section 7 by the connection wiring body 8, and the transparent lower electrode 3 may be a large number of transparent strip-shaped electrodes like the upper electrode, but the structure is simplified and a single wide electrode is provided. The electrodes are connected to the phase voltage generator 7 by the connection wiring 9 so that the phase voltage generator 7 can supply voltages of many phases that are out of phase and progress in time. The transparent substrate 25 is laminated below the lower electrode 3 to strengthen the front window.

[0005]

The operation will be described with reference to the example of the block diagram of the present apparatus shown in FIG. In this figure, in the phase voltage generator 7, the voltages of four phases 7a, 7b, 7c, and 7d are set as the voltages of the multiple phases out of phase, and the wirings 8a, 8b, and 8 of the connection wiring body 8 are respectively set.
c, 8d, and a plurality of transparent upper strip electrodes 4a, 4b, 4c, 4d, 41a, 41b, 41c, respectively.
It is a structure connected to. In the case of this example, the transparent lower electrode 3 is a single wide electrode, and the
The common electrode 7e of four-phase voltages a, 7b, 7c, and 7d is connected to the transparent lower electrode 3 by the connection wiring 9. As shown in the phase voltage generator 7 in the block diagram, the phase shifts 7a,
The voltages of the four phases 7b, 7c, and 7d are at times t1, t2, and t.
Since it changes to 3 and t4, the operation will be described in this order. At time t1, a voltage of 0 is applied between the transparent single wide lower electrode 3 and the transparent strip electrodes 4a and 41a, 42a with the transparent piezoelectric straining plate 2 interposed therebetween. This is 7
This is because the voltage of the phase a is connected by the wiring 8a and the common wiring 7e is connected by the connection wiring 9. Therefore, the portion of the transparent piezoelectric straining material flat plate 2 sandwiched between these many transparent strip electrodes and the wide lower electrode 3 does not shrink or stretch. Also,
Transparent single wide lower electrode 3 and transparent strip electrodes 4b and 4
A positive voltage is applied between 1b and 42b. This is 7b
This is because the voltage of the phase is connected by the wiring 8b and by the connection wiring 9 from the common electrode 7e. Therefore, the portion of the transparent piezoelectric straining material flat plate 2 sandwiched by the large number of transparent strip electrodes and the wide lower electrode 3 is expanded as a piezoelectric crystal characteristic. Further, a voltage of 0 is applied between the transparent single wide lower electrode 3 and the transparent strip electrodes 4c and 41c, 42c. This is because the voltage of the phase of 7c is connected by the wiring 8c and by the connection wiring 9 from the common pole 7e. Therefore, the portion of the transparent piezoelectric straining material flat plate 2 sandwiched between these many transparent strip electrodes and the wide lower electrode 3 does not shrink or stretch. Furthermore, a negative voltage is applied between the transparent single wide lower electrode 3 and the transparent strip electrodes 4d and 41d, 42d. This is because the voltage of the phase of 7d is connected by the wiring 8d and by the connection wiring 9 from the common pole 7e. Therefore, the portion of the transparent piezoelectric straining material flat plate 2 sandwiched between these many transparent strip electrodes and the wide lower electrode 3 contracts as a piezoelectric crystal characteristic. At this time, the surface portion of the transparent voltage distortion material flat plate 2 has the shape of the wave of the corrugated plate. Next, at time t2, the transparent single wide lower electrode 3 and the transparent strip electrodes 4a and 41a, 42a are sandwiched between the transparent voltage distortion material flat plates 2.
A positive voltage is applied between. This is because the voltage of the phase of 7a is connected by the wiring 8a and by the common wiring 7e by the connection wiring 9. Therefore, the transparent voltage-distortion plate 2 is sandwiched between these many transparent strip electrodes and the wide lower electrode 3.
The part of is extended. Further, a voltage of 0 is applied between the transparent single wide lower electrode 3 and the transparent strip electrodes 4b and 41b, 42b. This is because the voltage of the phase of 7b is the wiring 8b.
This is because the common pole 7e is connected by the connection arrangement 9.
Therefore, the portion of the transparent piezoelectric straining material flat plate 2 sandwiched between these many transparent strip electrodes and the wide lower electrode 3 does not shrink or stretch. In addition, a negative voltage is applied between the transparent single wide lower electrode 3 and the transparent strip electrodes 4c and 41c, 42c. This is because the voltage of the phase of 7c is connected by the wiring 8c and by the connection wiring 9 from the common pole 7e. Therefore, the portion of the transparent piezoelectric straining material flat plate 2 sandwiched between these many transparent strip electrodes and the wide lower electrode 3 contracts. Furthermore, a transparent single wide lower electrode 3 and a transparent strip electrode 4
A voltage of 0 is applied between d and 41d, 42d, etc. This is because the voltage of the phase of 7d is connected by the wiring 8d and by the connection wiring 9 from the common pole 7e. Therefore, the portion of the transparent piezoelectric straining material flat plate 2 sandwiched between these many transparent strip electrodes and the wide lower electrode 3 does not shrink or stretch.
At this time, the surface portion of the transparent piezoelectric strain material flat plate 2 has the shape of the wave of the corrugated plate, but the wave progresses slightly to the left from the time of t1. Further, at time t3, a voltage of 0 is applied between the transparent single wide lower electrode 3 and the transparent strip-shaped electrodes 4a and 41a, 42a with the transparent piezoelectric straining plate 2 interposed therebetween. This is because the voltage of the phase of 7a is the wiring 8a and the common pole 7
This is because the connection wiring 9 connects from e. Therefore, the portion of the transparent piezoelectric straining material flat plate 2 sandwiched between these many transparent strip electrodes and the wide lower electrode 3 does not shrink or stretch. Further, a negative voltage is applied between the transparent single wide lower electrode 3 and the transparent strip electrodes 4b and 41b, 42b. This is because the voltage of the phase of 7b is the wiring 8b and the common pole 7
This is because the connection wiring 9 connects from e. Therefore, the portion of the transparent voltage-distortion material flat plate 2 sandwiched between these many transparent strip electrodes and the wide lower electrode 3 contracts. In addition, a single transparent wide lower electrode 3 and transparent strip electrodes 4c and 41
A voltage of 0 is applied between c and 42c. This is because the voltage of the phase of 7c is the wiring 8c, and the common wiring 7e to the connection wiring 9
This is because they are connected with. Therefore, the portion of the transparent piezoelectric straining material flat plate 2 sandwiched between these many transparent strip electrodes and the wide lower electrode 3 does not shrink or stretch. Furthermore, a single transparent wide lower electrode 3 and transparent strip electrodes 4d and 4
A positive voltage is applied between 1d and 42d. This is 7d
This is because the voltage of the phase is connected by the wiring 8d and by the connection wiring 9 from the common electrode 7e. Therefore, the portion of the transparent voltage-distortion material flat plate 2 sandwiched between these many transparent strip electrodes and the wide lower electrode 3 extends. At this time, the surface portion of the transparent piezoelectric strain material flat plate 2 has the shape of the wave of the corrugated plate.
Waves are moving a little to the left from the time of 2. in this way,
As time t1, t2, and t3 progress, the wave on the surface portion of the transparent piezoelectric strain material flat plate 2 travels to the left as if the wave on the surface of the sea travels. In the example of the block diagram of the present device of FIG. 2, in the phase voltage generator 7, the voltages 7a, 7b, 7c and 7d are output as the voltages of many phases out of phase.
However, even if this voltage is generated in many phases such as 5 phase, 6 phase, and 7 phase, the connection wiring body 8 is changed to the wiring suitable for the phase, and the transparent piezoelectric strain is generated. It should be noted that the waves on the surface of the flat plate 2 can be made to travel to the left as if the waves on the surface of the sea were traveling.
In this case, a smoother wave shape is created, and rainwater drops 5
Effective to carry. In addition, the speed of time progress of many phases, that is, the period s of the voltage is shortened to make the size of the ultrasonic wave, and the waveform is resonated by the transparent piezoelectric straining material flat plate 2, and the rainwater droplets 5 are finely crushed. It is even more effective to carry. The water droplet wiper action explanatory diagram of the present invention of FIG. 3 shows a state in which rainwater droplets 5 are carried and wiped in the order of t1, t2, and t3 in the figure. A state in which water drops 5 of the rainwater are rounded by the surface tension and easily splash on the surface of the transparent hydrophobic material film 6 formed on the surface of the upper electrode on which the rainwater hits the strip-shaped electrode structures 4a and 4b. Then, it is shown that the waves are carried to the left as if the waves on the surface of the sea were traveling.

[0006]

EXAMPLE An example of the present invention will be described with reference to FIG. This figure is a cross section of a windshield of the embodiment installed in the automobile 1. The present embodiment has a structure in which a large number of transparent strip electrodes are used as upper and lower electrodes. A large number of transparent strip electrodes 10a, 10b, 10c, 10d, 101a, 101 sandwiching the transparent piezoelectric strain plate 2
b, 101c, 101d, etc. are formed, and a large number of transparent lower electrodes 12a, 12b, 12c, 12d, 12 are formed.
Lower electrodes such as 1a, 121b, 121c, 121d are formed. This is a structure in which a transparent hydrophobic material film 6 made of a transparent hydrophobic material is formed on the surface of the upper electrode on which the rainwater drops 5 hit. Multiple strip-shaped electrodes 10a, 10 which are transparent upper electrodes
b, 10c, 10d, 101a, 101b, 101c,
101d and the like are connected to the upper electrode phase voltage generator 14 by the upper electrode connection wiring body 11. A large number of transparent lower electrodes 12a, 12b, 12c, 12d, 121a, 121
b, 121c, etc. are connected to the lower electrode phase voltage generator 15 by the lower electrode connection wiring body 13. The common connection wiring 16 is connected to the common poles 14e and 15e of the upper electrode phase voltage generator 14 and the lower electrode phase voltage generator 15. In this way, the upper electrode phase voltage generator 14 generates traveling waves for a large number of strip electrodes of the upper electrode, and the lower electrode phase voltage generator 15
Thus, it is possible to independently generate traveling waves related to a large number of strip electrodes of the lower electrode. Upper electrode phase voltage generator 1
4 and the lower electrode phase voltage generator 15 respectively, the voltage amount command information 17 and 18 of a large number of phases, the phase shift amount command information 19 and 20 of a large number of phases, and the time progress of the large number of phases from the outside, respectively. It has a structure that can receive the speed command information 21, 22. The upper electrode phase voltage generator 14 will be described. The output voltage e1 is output according to the voltage amount command information 17, and the voltage waveform having the phase shift p1 corresponding thereto is output according to the phase shift amount command information 19 of the phase. In this example, the voltages of many phases are four phases, so 36
Divide 0 degree by 4 and generally output at plus or minus 90 degrees. Here, in particular, whether the phase shift is minus or plus is important, and plus or minus determines the forward or backward movement of the wave generated in the transparent piezoelectric strain material flat plate 2. According to the temporally advancing speed command information 21, the temporal advancing speed of the phase, that is, the voltage of the cycle s1 is output. The output four-phase voltage as the voltage of the plurality of phases is supplied to the plurality of strip electrodes 10a of the upper electrode by the upper electrode connection wiring body 11.
10b, 10c, 10d, 101a, 101b, 101
supply to c. With this output, it is possible to control the magnitude, the traveling direction, the traveling speed or the frequency of the wave generated on the transparent piezoelectric straining material flat plate 2 due to the piezoelectric action of the plurality of strip electrodes of the upper electrode. Similarly, the lower electrode phase voltage generator 15 outputs the output voltage e according to the voltage amount command information 18.
2 is output, and a voltage waveform having a phase shift p2 is output according to the phase shift amount command information 20 of the phase. According to the temporally advancing speed command information 22, the temporal advancing speed of the phase, that is, the voltage of the cycle s2 is output. The output four-phase voltages are supplied to the plurality of strip electrodes 12a, 12b, 12c, 12d, 1 of the lower electrodes by the upper electrode connection wiring body 13.
21a, 121b, 121c, etc. With this output, it is possible to control the magnitude, the traveling direction, the traveling speed, or the frequency of the wave generated on the transparent piezoelectric straining material flat plate 2 by the piezoelectric action of the multiple strip electrodes of the lower electrode. Here, since the upper electrode phase voltage generator 14 and the lower electrode phase voltage generator 15 are connected to the common poles 14e, 15e by the common connection wiring 16, the wave generated on the transparent piezoelectric straining material flat plate 2 is the upper electrode. The sum of the four-phase voltage output of the phase voltage generator 14 and the four-phase voltage output of the lower electrode phase voltage generator 15 results in the traveling direction of the rainwater droplets 5 corresponding to the speed of the vehicle, etc. It can be determined and effectively transported and discharged. FIG.
An operation example of this embodiment will be described below. This figure shows a large number of strip-shaped electrodes of the upper electrode and a large number of strip-shaped electrodes of the lower electrode separately when the front window of the automobile 1 is viewed from the front. This is a structure in which a large number of strip-shaped electrode directions of the upper electrode and a large number of strip-shaped electrode directions of the lower electrode intersect. Also,
The left and right sides of the front window are targeted. When operating this embodiment in rainy weather, the detection unit 23 detects the speed of the vehicle and the like, and the rainwater transportation control unit 24 causes the upper electrode phase voltage generation unit 14 and the lower electrode phase voltage generation unit 15 to have a large number of phases. It outputs and controls the voltage amount command information 17 and 18, the phase shift amount command information 19 and 20 of many phases, and the speed command information 21 and 22 that progress in time of many phases. Multiple strip electrodes 10a, 10b, 10 of the upper electrode
In c, 10d, etc., the belt-like direction is diagonally upper left and lower right, so the traveling direction of the wave is diagonally upper right and lower left as indicated by the arrow. Multiple strip electrodes 12a, 12b, 12 of lower electrodes
In c, 12d, etc., the belt-like direction is diagonally upper right lower left, and therefore the traveling direction of the wave is diagonal upper left lower right as shown by the arrow. That is, since the direction of the shape of many strip electrodes of the upper electrode and the direction of the shape of many strip electrodes of the lower electrode intersect, the traveling direction of the wave also intersects independently, but the sum of the intersecting waves, the wave Waves in all directions can be generated by the combined effect of. This control is performed by the rainwater transportation control unit 24.
Perform in. The detection unit 23 judges and controls the speed of the vehicle, determines command amount information, determines the voltage amount command information 17 and 18 for many phases, and the phase shift amount command information 1 for many phases.
9, 20 and a large number of phases are converted into speed command information 21 and 22 that progress in time and output, and the size, direction, and speed of the wave generated in the transparent piezoelectric straining material flat plate 2 are controlled. .
For example, when the automobile 1 is at a low speed or at a stop, the water droplet 5 tends to drop downward because there is no front wind. Therefore, it is possible to enhance the wiper effect by synthesizing the traveling directions of the waves and diagonally descending. This is because the stop speed of the vehicle is detected, and the rainwater transport control unit 24 instructs the upper electrode phase voltage generation unit 14 to supply voltage amount command information 17 for a large number of phases and phase shift amount command information 19 for a large number of phases.
This is a plus sign with the wave traveling to the lower left. Also, the lower electrode phase voltage generation unit 15 outputs the amount as a certain amount in the speed command information 21 of the time progress of many phases.
In addition, the voltage amount command information 18 for a large number of phases, the phase shift amount command information 20 for a large number of phases, and the speed command information 22 that progresses over time for a large number of phases may be output as zero amounts. When the vehicle 1 is at a medium speed, the water drops 5 on the left side of the front window tend to flow to the left because of the front wind. Therefore, the wiper effect is enhanced by setting the wave traveling direction to the left. This is because the medium speed of the vehicle is detected, and the rainwater transport control unit 24 causes the upper electrode phase voltage generation unit 14 to supply voltage amount command information 17 for a large number of phases and phase shift amount command information for a large number of phases with a plus sign 19. Also, the lower electrode phase voltage generation unit 15 outputs the amount as a certain amount in the speed command information 21 of the time progress of many phases.
Output as voltage amount command information 18 of many phases, phase shift amount command information of many phases plus signed 20, and speed command information 22 of many phases that are the same as the amounts Just do it. When the vehicle 1 is at high speed, the front wind is strong, so that the water droplets 5 flow upward. Therefore, the wiper effect is enhanced by making the traveling direction of the wave obliquely upward. Here, the voltage amount command information 1 for a large number of phases is sent to the upper electrode phase voltage generator 14.
7, the phase shift amount command information 19 of a large number of phases, and the time command speed information 21 of a large number of phases are output as zero amounts, while the voltage of a large number of phases is output to the lower electrode phase voltage generator 15. The quantity command information 18, the phase shift quantity command information of a number of phases plus a sign 20, and the speed command information 22 of a number of phases that progress in time may be output as quantities. As described above, in the present embodiment, since the multiple strip electrode shape directions of the upper electrode intersect with the multiple strip electrode shape directions of the lower electrode, the traveling directions of the waves are diagonally downward, leftward, and diagonally upward. It is also possible to control the traveling direction of the wave, and depending on the case, it is possible to command the traveling direction of the wave in all directions, control the magnitude power of the wave, change the frequency and control the traveling speed of the wave appropriately. Therefore, it is possible to provide a windshield squeegeeless rainwater wiper device having a high wiper effect, which corresponds to the situation. In addition, in the windshield manufacturing embodiment of the present invention, a quartz plate, a piezoelectric resin plate or the like is used for the transparent piezoelectric straining material flat plate 2, and a thin film of an indium oxide film is formed on a large number of transparent strip electrodes. After that, a large number of strip electrodes are processed by so-called photolithography. After that, the transparent hydrophobic material film 6 is formed and processed. The upper and lower electrode connection wiring bodies 11 and 13 can also be processed in parallel with this series of processing steps. As an example, as shown in FIG. 5, a plurality of strip electrodes 12na, 12nb, 12nc, 12nd of the transparent lower electrode are connected to the lower electrode connection wiring body 13 which is connected to the four-phase voltage in the case of this embodiment. The wirings 13a, 13b, 13c, 13d, etc. are processed by the thin film formation of the indium oxide film and the silicon oxide film and the photolithography using the upper and lower peripheral portions of the piezoelectric strain material flat plate. By doing so, external wiring work to the lower electrode of the lower electrode phase voltage generator 15 can be reduced.

[0007]

According to the present invention, by utilizing the piezoelectric strain action of electrodes sandwiching a piezoelectric strain material flat plate, a traveling wave is generated on the surface of the piezoelectric strain material flat plate so that the wave on the surface of the sea travels, and rain water is generated. There is a transparent hydrophobic material film on the surface that hits, it is possible to efficiently remove rainwater droplets, and also
The direction of wave propagation can be controlled in any direction by the command quantity information output by the rainwater transport control unit by intersecting the direction of many strip electrodes of the transparent upper electrode with the direction of many strip electrodes of the lower electrode. The power of the power can be controlled, and the traveling speed of the wave can be properly controlled by changing the frequency, so that it can correspond to the speed of the car. Therefore, a highly effective front window squeegeeless rainwater wiper device can be provided. Further, since there is no squeegee, the visibility is improved, so that the safety is improved, and further, since no extra protrusion is provided on the front window, the functional beauty of the automobile can be improved.

[Brief description of drawings]

FIG. 1 Mechanism diagram of a squeegeeless rainwater wiper device of the present invention

FIG. 2 is a block diagram of the device of the present invention.

FIG. 3 is an explanatory view of the action of the rain water drop wiper of the present invention.

FIG. 4 shows an embodiment of the present invention.

FIG. 5 is an explanatory diagram of an operation example in the embodiment of the present invention.

[Explanation of symbols]

1 Automotive 2 Transparent Piezoelectric Strain Material Flat Plate 3 Transparent Lower Electrodes 4a, 4b, Transparent Multiple Strip Electrodes 5 Rainwater Droplets 6 Transparent Hydrophobic Material Film 7 Phase Voltage Generator 8 Connection Wiring Body 9 Connection Wiring 10a, 10b , Many strip electrodes of transparent upper electrode 11 upper electrode connecting wiring bodies 12a, 12b, many strip electrodes of transparent lower electrode 13 lower electrode connecting wiring body 14 upper electrode phase voltage generating section 15 lower electrode phase voltage generating section 16 Common connection wiring 17 Voltage amount command information of many phases of upper electrode 18 Voltage amount command information of many phases of lower electrode 19 Phase shift amount command information of many phases of upper electrode 20 Phase shift of many phases of lower electrode Quantity command information 21 Time-dependent speed command information of many phases of upper electrode 22 Time-wise speed command information of many phases of lower electrode 23 Detection unit 24 Rainwater transportation control unit 25 Transparent substrate

Claims (2)

[Claims] 1. A transparent piezoelectric strain material flat plate is sandwiched between an upper side and a lower side to form a large number of transparent strip-shaped electrodes, and the piezoelectric strain action between the piezoelectric strained material flat plate and the sandwiched electrode is utilized,
Piezostrictive strain with a multi-layered electrode structure that creates a wave on the flat surface of the piezoelectric strain material as if a wave on the surface of the sea were traveling, and with a transparent hydrophobic material film formed on the surface exposed to rainwater. In order to generate a wave traveling on the surface of a flat plate, a large number of transparent strip electrodes are equipped with a phase voltage generator that gives a voltage of many phases that are out of phase and progress in time. Windshield squeegee rainwater wiper device. 2. A plurality of transparent strip electrode shapes according to claim 1, wherein the strip electrode shape direction of the upper electrode and the strip electrode shape direction of the lower electrode are made to intersect, and in the electrode structure of the upper electrode, The electrode structure is arranged so that the direction of travel is licked in the upper right lower left direction, and in the electrode structure of the lower electrode, the direction of wave propagation is licked in the upper left lower right direction, and so on. The phase shift amount and the upper electrode phase voltage generation unit that can output these to the upper and lower electrodes according to the command amount from the outside in the time progressing speed of many phases,
Rainwater that has a lower electrode phase voltage generator and obtains information such as vehicle speed from the detector and gives each command amount to the upper and lower electrode phase voltage generators to effectively control the waves generated on the piezoelectric strain plate. A windshield squeegee-less rainwater wiper device for automobiles characterized by having a transportation control unit.