JP2020192916A - Wiper device - Google Patents

Abstract

To provide a wiper device which can suppress chattering without using a sensor for detecting the chattering.SOLUTION: When the water-repelling coating is applied on the surface of a window shield glass 12, a micro computer 58 sets a wiping speed mode of wiper blades 28, 30 for wiping a window shield glass 12 by rotation of a wiper motor 18 at a higher speed than in a wiping speed mode when a water repellent coating is not applied on the surface of the window shield glass 12. The micro computer 58 controls rotation of the wiper motor 18 so that the wiper blades 28, 30 perform wiping operation in the set wiping speed mode.SELECTED DRAWING: Figure 1

Description

The present invention relates to a wiper device.

In a wiper device that wipes on the windshield glass, the wiper blade vibrates during the wiping operation, which is a problem of so-called chattering. In recent years, due to the power saving of vehicles, control has been performed to suppress the rotation of the wiper motor that drives the wiper blade. However, when the rotation speed of the wiper motor is suppressed, the wiping speed of the wiper blade becomes higher than before. descend. The wiper blade with a reduced wiping speed is easily affected by the friction on the surface of the windshield glass, and as a result, chattering is likely to occur.

Patent Document 1 discloses an invention of a wiper device that suppresses chatter by increasing a pressing force of a wiper arm when a sensor detects chatter.

Japanese Unexamined Patent Publication No. 08-290756

However, since the wiper device described in Patent Document 1 requires a sensor for detecting chatter, the manufacture of the wiper device becomes complicated, the manufacturing cost of the wiper device increases, and the maintainability after manufacturing is difficult. There was a problem that there was.

The present invention has been made in view of the above, and an object of the present invention is to provide a wiper device capable of suppressing chatter without using a sensor for detecting chatter.

In order to solve the above-mentioned problems, in the wiper device according to claim 1, when the surface of the windshield is coated with a water-repellent coating, the wiping speed of the wiper blade that wipes the windshield by the rotation of the wiper motor is set. The wiper blade is wiped at a wiping speed setting unit set at a speed higher than the wiping speed when the surface of the windshield is not coated with a water repellent coat and a wiping speed set by the wiping speed setting unit. , A control unit that controls the rotation of the wiper motor, and the like.

According to this wiper device, chattering can be suppressed without using a sensor that detects chattering by wiping the wiper blade at a wiping speed set according to the presence or absence of a water-repellent coating on the surface of the windshield.

The wiper device according to claim 2 is the wiper device according to claim 1, wherein the wiper speed setting unit does not have the water-repellent coating on the surface of the windshield and the wiper blade is subjected to friction reduction treatment. When is applied, the wiping speed of the wiper blade is set to the first wiping speed, the water-repellent coating is not applied to the surface of the windshield, and the wiper blade is subjected to friction reduction treatment. If not, the wiping speed of the wiper blade is set to a second wiping speed higher than the first wiping speed, the water-repellent coating is applied to the surface of the windshield, and the wiper blade is subjected to friction reduction treatment. When is applied, the wiping speed of the wiper blade is set to a third wiping speed higher than the second wiping speed, the surface of the windshield is coated with the water repellent coating, and the wiper blade is When the wiper blade is not subjected to the friction reduction treatment, the wiping speed of the wiper blade is set to a fourth wiping speed higher than the third wiping speed.

According to this wiper device, the wiping speed of the wiper blade is changed according to the presence or absence of the water-repellent coating on the surface of the windshield and the presence or absence of the friction reduction treatment of the wiper blade, without using a sensor for detecting chatter. Chatter can be suppressed.

The wiper device according to claim 3 is the wiper device according to claim 1, in which a score is added when the water-repellent coating is applied to the surface of the windshield, and the wiper blade is subjected to friction reduction treatment. If so, the score is subtracted, the score is added according to the elapsed period after the water-repellent coating is applied, and the score is added according to the elapsed period after the replacement of the wiper blade, and the total score is obtained. The wiping speed setting unit includes a state evaluation unit that outputs the above, and the wiping speed setting unit sets the wiping speed of the wiper blade at a higher speed as the total score is higher.

According to this wiper device, the wiper depends on the presence / absence of the water-repellent coat on the surface of the windshield, the presence / absence of the friction reduction treatment of the wiper blade, and the aging deterioration of the water-repellent coat and the wiper blade on the surface of the windshield. By changing the wiping speed of the blade, chattering can be suppressed without using a sensor that detects chattering.

The wiper device according to claim 4 is the wiper device according to any one of claims 1 to 3, when a predetermined re-implementation period elapses after the implementation of the water-repellent coating. It includes a state notification unit that notifies that the wiper blade needs to be replaced and that the wiper blade needs to be replaced when a predetermined replacement period has elapsed after the replacement of the wiper blade.

According to this wiper device, the time for re-implementing the water-repellent coat on the surface of the windshield and the time for replacing the wiper blade are notified, and the water-repellent coat is re-implemented and the wiper blade is replaced according to the notification. As a result, chattering of the wiper blade can be prevented.

It is the schematic which shows the structure of the wiper device which concerns on 1st Embodiment of this invention. It is a circuit diagram which shows typically the circuit of the wiper device which concerns on 1st Embodiment of this invention. It is sectional drawing which shows an example of the washer pump which concerns on 1st Embodiment of this invention. It is the schematic which illustrated the relationship between chatter generation and wiping speed. It is a table which showed an example of the wiping speed mode according to the presence / absence of the water-repellent coating on the windshield glass surface, and the presence / absence of the low μ coating of the wiper blade in the wiper device according to the first embodiment of the present invention. It is a table which showed an example of setting of the wiping speed mode according to the presence or absence of the water-repellent coating on the surface of the windshield glass in the wiper device which concerns on 1st Embodiment of this invention. It is a flowchart which showed an example of the process of setting the wiping speed mode of the wiper device which concerns on 1st Embodiment of this invention. It is the schematic which showed an example of the information display which displays the information concerning the wiping speed mode setting of a wiper device. A table showing an example of the wiping speed mode according to the presence / absence of the water-repellent coating on the surface of the windshield glass and the presence / absence of the low μ coating of the wiper blade in the wiper device according to the development example of the first embodiment of the present invention. Is. It is a flowchart which showed an example of the process of setting the wiping speed mode of the wiper device which concerns on development example of 1st Embodiment of this invention. It is a flowchart which showed an example of the process of setting the wiping speed mode of the wiper device which concerns on 2nd Embodiment of this invention. It is a flowchart which showed an example of the processing of the maintenance time notification of the wiper device which concerns on the development example of the 2nd Embodiment of this invention.

[First Embodiment]
FIG. 1 is a schematic view showing the configuration of the wiper device 10 according to the first embodiment of the present invention. The wiper device 10 is for wiping the windshield glass 12 provided in a vehicle such as a passenger car, and includes a pair of wipers 14 and 16, a wiper motor 18, a link mechanism 20, and a control circuit 22. It has.

The wipers 14 and 16 are composed of wiper arms 24 and 26 and wiper blades 28 and 30, respectively. The base ends of the wiper arms 24 and 26 are fixed to the pivot shafts 42 and 44, which will be described later, and the wiper blades 28 and 30 are fixed to the tips of the wiper arms 24 and 26, respectively.

In the wipers 14 and 16, the wiper blades 28 and 30 reciprocate on the windshield glass 12 with the operation of the wiper arms 24 and 26, and the wiper blades 28 and 30 wipe the windshield glass 12.

The wiper motor 18 has an output shaft 32 capable of forward and reverse rotation via a reduction mechanism 52 mainly composed of a worm gear, and the link mechanism 20 includes a crank arm 34, a first link rod 36, and a pair of pivots. It includes levers 38 and 40, a pair of pivot shafts 42 and 44, and a second link rod 46.

One end side of the crank arm 34 is fixed to the output shaft 32, and the other end side of the crank arm 34 is operably connected to one end side of the first link rod 36. Further, the other end side of the first link rod 36 is operably connected to a position near the end different from the end having the pivot shaft 42 of the pivot lever 38, and is connected to the end having the pivot shaft 42 of the pivot lever 38. Both ends of the second link rod 46 are operably connected to different ends and to the ends of the pivot lever 40 corresponding to the ends of the pivot lever 38.

Further, the pivot shafts 42 and 44 are operably supported by a pivot holder (not shown) provided on the vehicle body, and the ends of the pivot levers 38 and 40 having the pivot shafts 42 and 44 are via the pivot shafts 42 and 44. The wiper arms 24 and 26 are fixed respectively.

In the wiper device 10, when the output shaft 32 is rotated forward and reverse at a rotation angle θ1 in a predetermined range, the rotational force of the output shaft 32 is transmitted to the wiper arms 24 and 26 via the link mechanism 20, and the wiper arm 24, With the reciprocating operation of 26, the wiper blades 28 and 30 reciprocate between the lower reversing position P2 and the upper reversing position P1 on the windshield glass 12. The value of θ1 can take various values depending on the configuration of the link mechanism of the wiper device and the like, but in the present embodiment, it is set to 140 ° as an example.

In the wiper device 10 according to the present embodiment, as shown in FIG. 1, when the wiper blades 28 and 30 are located at the storage position P3, the crank arm 34 and the first link rod 36 are linear. It is said to be a crank.

The storage position P3 is provided below the downward inversion position P2. The wiper blades 28 and 30 operate at the retracted position P3 by rotating the output shaft 32 by θ2 from the state where the wiper blades 28 and 30 are in the downward inversion position P2. The value of θ2 can take various values depending on the configuration of the link mechanism of the wiper device and the like, but in the present embodiment, it is set to 10 ° as an example.

When θ2 is “0”, the lower inversion position P2 and the storage position P3 coincide with each other, and the wiper blades 28 and 30 stop at the lower inversion position P2 and are stored.

A control circuit 22 for controlling the rotation of the wiper motor 18 is connected to the wiper motor 18. The control circuit 22 according to the present embodiment generates, for example, a rotation angle sensor 54 that detects the rotation speed and rotation angle of the output shaft 32 of the wiper motor 18, and a current for operating the wiper motor 18 by pulse width modulation (PWM). It has a drive circuit 56 that supplies the wiper motor 18.

Since the wiper motor 18 according to the present embodiment has the reduction mechanism 52 as described above, the rotation speed and the rotation angle of the output shaft 32 are not the same as the rotation speed and the rotation angle of the wiper motor main body. However, in the present embodiment, the wiper motor main body and the reduction mechanism 52 are integrally inseparably configured. Therefore, hereinafter, the rotation speed and the rotation angle of the output shaft 32 are regarded as the rotation speed and the rotation angle of the wiper motor 18. ..

The rotation angle sensor 54 is provided in the reduction mechanism 52 of the wiper motor 18, and converts the magnetic field (magnetic field) of the exciting coil or magnet that rotates in conjunction with the output shaft 32 into an electric current for detection.

The control circuit 22 can calculate the position of the wiper blade on the windshield glass 12 from the rotation angle of the output shaft 32 detected by the rotation angle sensor 54, and the rotation speed of the output shaft 32 changes according to the position. It has a microcomputer 58 that controls a drive circuit 56. The control circuit 22 is provided with a memory 60 which is a storage device for storing data and a program used for controlling the drive circuit 56. The memory 60 stores data and a program for calculating the rotation speed of the output shaft 32 according to the positions of the wiper blades 28 and 30 on the windshield glass 12. A vehicle ECU (Electronic Control Unit) 90 that controls control of a vehicle engine or the like is connected to the microcomputer 58.

A wiper switch 50, a washer switch 62, an intermittent volume 92, and a rain sensor 94 that detects water droplets on the surface of the windshield glass 12 are connected to the vehicle ECU 90.

The wiper switch 50 is a switch that turns on or off the electric power supplied from the vehicle battery to the wiper motor 18. The wiper switch 50 includes a low-speed operation mode selection position for operating the wiper blades 28 and 30 at a low speed, a high-speed operation mode selection position for operating the wiper blades 28 and 30 at a high speed, an intermittent operation mode selection position for intermittently operating the wiper blades 28 and 30, and a rain sensor 94. It is possible to switch between the AUTO operation mode selection position and the storage (stop) mode selection position, which are operated when raindrops are detected. Further, a signal corresponding to the selected position of each mode is output to the microcomputer 58 via the vehicle ECU 90.

When the signal output from the wiper switch 50 according to the selected position of each mode is input to the microcomputer 58 via the vehicle ECU 90, the microcomputer 58 controls the memory 60 corresponding to the output signal from the wiper switch 50. This is done using the stored data and program.

The washer switch 62 is a switch that turns on or off the electric power supplied from the vehicle battery to the washer motor 64 and the wiper motor 18. The washer switch 62 is integrally provided with, for example, an operating means such as a lever provided with the wiper switch 50 described above, and the wiper motor 18 and the washer motor are provided while the occupant continues to pull the lever or the like. Operate 64.

The washer pump 66 is driven by the rotation of the washer motor 64, and the washer pump 66 pumps the washer fluid in the washer fluid tank 68 to the open injection hose 72A or the closed injection hose 72B. The open injection hose 72A is connected to an open injection nozzle 74A provided near the tips of the wiper arms 24 and 26, respectively. Further, the closing injection hose 72B is connected to a closing injection nozzle 74B provided near the tips of the wiper arms 24 and 26, respectively.

As shown in FIG. 1, the opening injection nozzle 74A is in the direction in which the wiper blades 28 and 30 operate in the open operation in which the wiper blades 28 and 30 wipe from the lower inversion position P2 to the upper inversion position P1. It is provided toward the upper inversion position P1. In the present embodiment, in the case of the open operation, the washer liquid is injected from the open injection nozzle 74A in the open injection direction 76A.

Further, as shown in FIG. 1, the closing injection nozzle 74B has a direction in which the wiper blades 28 and 30 operate in the closing operation in which the wiper blades 28 and 30 wipe from the upper inversion position P1 to the lower inversion position P2. That is, it is provided toward the downward inversion position P2. In the present embodiment, in the case of the closing operation, the washer liquid is injected from the closing injection nozzle 74B in the closing injection direction 76B.

The washer motor 64 reverses the rotation direction between the open operation and the close operation, and injects the washer fluid from the open injection nozzle 74A in the open operation and from the closed injection nozzle 74B in the closed operation. Drive the pump 66.

The intermittent volume 92 is a switch for intermittently changing the operation cycle of the wiper blades 28 and 30 when the wiper switch 50 is in the intermittent operation mode selection position.

The rain sensor 94 includes, for example, an LED that is an infrared light emitting element, a photodiode that is a light receiving element, a lens that forms an infrared optical path, and a control circuit. The infrared rays emitted from the LED are totally reflected by the windshield glass 12, but if water droplets are present on the surface of the windshield glass 12, a part of the infrared rays is transmitted to the outside through the water droplets, so that the windshield glass 12 is used. Reflection amount is reduced. As a result, the amount of light entering the photodiode, which is a light receiving element, is reduced. Based on the decrease in the amount of light, water droplets on the surface of the windshield glass 12 are detected.

FIG. 2 is a circuit diagram schematically showing a circuit of the wiper device 10 according to the present embodiment. As shown in FIG. 2, the wiper device 10 drives the wiper motor 18 to reciprocate the wiper arms 24 and 26 connected to the output shaft 32 via a link mechanism, and the washer motor 64. A pump drive circuit 57 for driving, a drive circuit 56 for driving the wiper drive circuit 88 and the pump drive circuit 57, and a control circuit 22 for controlling the drive circuit 56 are included. The control circuit 22 of the wiper device 10 according to the present embodiment includes the microcomputer 58 shown in FIG. 2, and the drive circuit 56 includes a predriver 98, a relay drive circuit 78, and an FET drive circuit 80. There is. A wiper switch 50, a washer switch 62, a rain sensor 94, and an intermittent volume 92 are connected to the microcomputer 58 via a vehicle ECU 90 (not shown).

The wiper drive circuit 88 includes four FETs 82A to 82D. In the FET 82A, the drain is connected to the power supply (+ B), the gate is connected to the pre-driver 98, and the source is connected to one end of the wiper motor 18. In the FET 82B, the drain is connected to the power supply (+ B), the gate is connected to the pre-driver 98, and the source is connected to the other end of the wiper motor 18. In the FET 82C, the drain is connected to one end of the wiper motor 18, the gate is connected to the pre-driver 98, and the source is grounded. In the FET 82D, the drain is connected to the other end of the wiper motor 18, the gate is connected to the pre-driver 98, and the source is grounded.

The pre-driver 98 controls the drive of the wiper motor 18 by switching the control signals supplied to the gates of the FETs 82A to 82D. That is, the pre-driver 98 turns on the pair of FET 82A and FET 82D when rotating the output shaft 32 of the wiper motor 18 in a predetermined direction, and turns on the output shaft 32 of the wiper motor 18 in the direction opposite to the predetermined direction. , Turn on the pair of FET 82B and FET 82C. Further, the pre-driver 98 performs PWM to change the ratio (duty ratio) of the time during which the set of FETs 82 to be turned on is on in a predetermined control cycle according to the target rotation speed of the output shaft 32 of the wiper motor 18. .. By the above control, the rotation direction and the rotation speed of the output shaft 32 of the wiper motor 18 are controlled.

The pump drive circuit 57 includes a relay unit 84 containing two relays RLY1 and RLY2, and two FETs 86A and 86B. The relay coils of the relays RLY1 and RLY2 of the relay unit 84 are connected to the relay drive circuit 78, respectively. The relay drive circuit 78 switches the relays RLY1 and RLY2 on and off (excitation / stop of the relay coil). The relays RLY1 and RLY2 maintain a state in which the common terminal 84C is connected to the first terminal 84A (state shown in FIG. 2: off state) while the relay coil is not excited, and the relay coil is excited. And the common terminal 84C is switched to the state of being connected to the second terminal 84B. The common terminal 84C of the relay RLY1 is connected to one end of the washer motor 64, and the common terminal 84C of the relay RLY2 is connected to the other end of the washer motor 64. Further, the first terminal 84A of the relays RLY1 and RLY2 is connected to the drain of the FET 86B, and the second terminal 84B of the relays RLY1 and RLY2 is connected to the power supply (+ B).

The gate of the FET 86B is connected to the FET drive circuit 80, and the source is grounded. The duty ratio between the on / off of the FET 86B and the on time of the FET 86B (the ratio of the time during which the FET 86B is on in a predetermined control cycle) is controlled by the FET drive circuit 80. An FET 86A is provided between the drain of the FET 86B and the power supply (+ B). Since the control signal is not input to the gate, the FET 86A is not switched on and off, and is provided for the purpose of using the parasitic diode for absorbing the surge.

The relay drive circuit 78 and the FET drive circuit 80 control the drive of the washer motor 64 by switching the on / off of the two relays RLY1 and RLY2 and the FET 86B. That is, when the output shaft of the washer motor 64 is rotated in a predetermined direction, the relay drive circuit 78 turns on the relay RLY1 (relay RLY2 is off), and the FET drive circuit 80 turns on the FET 86B at a predetermined duty ratio. When the washer motor 64 is rotated in the direction opposite to the predetermined direction, the relay drive circuit 78 turns on the relay RLY2 (relay RLY1 is off), and the FET drive circuit 80 turns on the FET 86B at a predetermined duty ratio. By the above control, the rotation direction and the rotation speed of the output shaft of the washer motor 64 are controlled. The circuit of the wiper device 10 according to the present embodiment is provided with a current sensor (not shown) for detecting the current (motor current) flowing through the coil of the wiper motor 18.

FIG. 3 is a cross-sectional view showing an example of the washer pump 66 according to the present embodiment. The washer pump 66 according to the present embodiment is a type of turbo pump including a turbine 66A driven by a washer motor 64. The turbine 66A is driven in the direction of arrow OPEN for open operation and in the direction of arrow CLOSE for closed operation.

By driving the turbine 66A, the washer fluid in the washer fluid tank 68 is sucked into the pump housing 66B from the suction port 66C. Then, when the turbine 66A is driven in the arrow OPEN direction, the washer fluid in the pump housing 66B is sent to the open discharge port 66D, and when the turbine 66A is driven in the arrow CLOSE direction, the washer fluid in the pump housing 66B is sent to the closed discharge port 66E. It is discharged. The open discharge port 66D is connected to the open injection nozzle 74A via the open injection hose 72A, and the closed discharge port 66E is connected to the closed injection nozzle 74B via the closed injection hose 72B. ing. Therefore, the washer fluid is injected from the open injection nozzle 74A when the turbine 66A is driven in the arrow OPEN direction, and from the closed injection nozzle 74B when the turbine 66A is driven in the arrow CLOSE direction.

As shown in FIG. 3, the washer pump 66 according to the present embodiment has a valve 66F made of an elastic body such as rubber or synthetic resin. The valve 66F bends under the pressure of the washer fluid pumped by the turbine 66A and closes the washer fluid inlet 66G when open or the washer fluid inlet 66H when closed.

For example, when the turbine 66A is driven in the direction of the arrow OPEN, the pressure on the washer fluid inlet 66G side at the time of opening increases, so that the valve 66F bends and closes the washer fluid inlet 66H at the time of closing. Further, when the turbine 66A is driven in the direction of the arrow CLOSE, the pressure on the washer fluid inlet 66H side at the time of closing increases, so that the valve 66F bends and closes the washer fluid inlet 66G at the time of opening. As a result, the washer fluid is selectively injected from the open injection nozzle 74A or the closed injection nozzle 74B by rotating the turbine 66A in the forward or reverse direction.

FIG. 4 is a schematic view illustrating the relationship between chatter generation and wiping speed. The occurrence of chatter changes depending on the presence or absence of a water-repellent coating on the surface of the windshield glass and the presence or absence of a low μ coating on the wiper blades 28 and 30. In FIG. 4, the curve 100 is the case without the water-repellent coat and the low μ coat, the curve 102 is the case without the water-repellent coat and the low μ coat, and the curve 104 is the case with the water-repellent coat and the low μ coat. The curve 106 is the case with the water-repellent coating and without the low μ coating.

As shown in FIG. 4, when the wiping speed is lowered to a certain extent, chattering occurs, but the wiping speed at which chattering begins to occur is low for the water-repellent coat on the surface of the windshield glass 12 and the wiper blades 28 and 30. It depends on the presence or absence of each μ coat.

FIG. 5 is a table showing an example of the wiping speed mode according to the presence / absence of the water-repellent coating on the surface of the windshield glass 12 and the presence / absence of the low μ coating of the wiper blades 28 and 30 in the wiper device 10 according to the present embodiment. Is. The wiping speeds in A +, A, B +, and B, which are the wiping speed modes shown in FIG. 5, show the following magnitude relations.
A + ＞ A ＞ B ＋ ＞ B

Therefore, the wiping speed corresponding to the case without the water-repellent coat and with the low μ coat is the slowest, followed by the case without the water-repellent coat and without the low μ coat, and the case with the water-repellent coat and the low μ coat. Next to that, the wiping speed corresponding to the case with the water-repellent coating and without the low μ coating is the highest.

The wiping speed in each of the wiping speed modes A +, A, B +, and B shown in FIG. 5 is specifically determined through, for example, an experiment using an actual machine.

From the above relationship, the presence of the water-repellent coat on the surface of the windshield glass 12 is a factor that induces the chattering of the wiper blades 28 and 30, and the presence of the low μ coat of the wiper blades 28 and 30 is the wiper blade 28, It is considered to be a factor that suppresses the occurrence of 30 chatters.

In the present embodiment, as shown in FIG. 6, the wiping speed mode is controlled according to the presence or absence of the water-repellent coating on the surface of the windshield glass 12. The setting of the wiping speed mode shown in FIG. 6 is mainly performed by the vehicle manufacturer or the vehicle dealer, and the selected wiping speed mode is maintained unless it is intentionally changed. That is, it is not reset when the ignition switch of the vehicle is turned on and off.

FIG. 7 is a flowchart showing an example of processing for setting the wiping speed mode of the wiper device 10 according to the present embodiment. In step 700, it is determined whether or not the surface of the windshield glass 12 is coated with water repellent. In step 700, if the surface of the windshield glass 12 is coated with water-repellent coating, the procedure proceeds to step 702, and if the surface of the windshield glass 12 is not coated with water-repellent coating, the procedure proceeds to step 704.

In step 702, the wiping speed mode of the wiper blades 28 and 30 is set to A shown in FIG. 4, and the process ends. In step 704, the wiping speed mode of the wiper blades 28 and 30 is set to B, which is slower than A shown in FIG. 4, and the process ends.

The processing step shown in FIG. 7 is performed using the information display 202, which is a touch panel provided near, for example, the steering wheel 204 of the dashboard 200 of the vehicle shown in FIG. Alternatively, it may be set using a device such as a personal computer connected to the vehicle ECU 90.

As described above, the wiper device 10 according to the present embodiment detects chatter by changing the wiping speed mode of the wiper blades 28 and 30 according to the presence or absence of the water-repellent coating on the surface of the windshield glass 12. It is possible to suppress the chattering of the wiper blades 28 and 30 without using the sensor.

The wiper device 10 according to the present embodiment can accurately suppress the chattering of the wiper blades 28 and 30 by a simple measure of changing the wiping speed mode of the wiper blades 28 and 30. Further, since the wiper device 10 according to the present embodiment does not use a sensor for detecting chatter, it is possible to avoid an increase in the manufacturing cost of the wiper device 10 and complicated maintenance due to an increase in the number of parts due to the addition of the sensor.

Further, in the wiper device 10 according to the present embodiment, the wiper blades 28 and 30 are wiped in the wiping speed mode set according to the surface condition of the windshield glass 12, so that the user can experience an unpleasant phenomenon due to chatter. It is possible to prevent the awareness.

[Development example of the first embodiment]
Subsequently, a development example of the first embodiment of the present invention will be described. In this development example, the wiping speed mode of the wiper blades 28 and 30 is determined in consideration of the presence or absence of the water-repellent coating on the surface of the windshield glass 12 and the presence or absence of the low μ coating of the wiper blades 28 and 30. Although it is different from the first embodiment, other configurations are the same as those of the first embodiment, so that the same reference numerals as those of the first embodiment are used and detailed description thereof will be omitted.

FIG. 9 is a table showing an example of the wiping speed mode according to the presence / absence of the water-repellent coating on the surface of the windshield glass 12 and the presence / absence of the low μ coating of the wiper blades 28 and 30. As shown in FIG. 9, when the surface of the windshield glass 12 is water-repellent coated and the wiper blades 28 and 30 are not coated with a low μ coating, the wiping speed mode of the wiper blades 28 and 30 is set to the maximum. Set to high speed A +. When the surface of the windshield glass 12 is coated with water repellent and the wiper blades 28 and 30 are coated with a low μ coating, the wiping speed mode of the wiper blades 28 and 30 is set to the next highest speed A. .. If the surface of the windshield glass 12 is not coated with water-repellent coating and the wiper blades 28 and 30 are not coated with a low μ coating, the wiping speed mode of the wiper blades 28 and 30 is set to B +, which is the second fastest after A. Set to. When the surface of the windshield glass 12 is not coated with water-repellent coating and the wiper blades 28 and 30 are coated with a low μ coating, the wiping speed mode of the wiper blades 28 and 30 is set to the slowest B. ..

FIG. 10 is a flowchart showing an example of processing for setting the wiping speed mode of the wiper device 10 according to the development example of the present embodiment. In step 100, it is determined whether or not the surface of the windshield glass 12 is coated with a water repellent coating. In step 100, if the surface of the windshield glass 12 is coated with water-repellent coating, the procedure proceeds to step 102, and if the surface of the windshield glass 12 is not coated with water-repellent coating, the procedure proceeds to step 108.

In step 102, it is determined whether or not the wiper blades 28 and 30 are coated with a low μ coating. In step 102, if the wiper blades 28 and 30 are low μ coated, the procedure is shifted to step 104, and if the wiper blades 28 and 30 are not coated with low μ, the procedure is shifted to step 106. To do.

In step 104, the wiping speed mode of the wiper blades 28 and 30 is set to A shown in FIG. 9, and the process ends. In step 106, the wiping speed mode of the wiper blades 28 and 30 is set to A +, which is faster than A shown in FIG. 9, and the process ends.

When the surface of the windshield glass 12 is not coated with water repellent in step 100, it is determined in step 108 whether or not the wiper blades 28 and 30 are coated with low μ. In step 108, if the wiper blades 28 and 30 are low μ coated, the procedure is shifted to step 110, and if the wiper blades 28 and 30 are not coated with low μ, the procedure is shifted to step 112. To do.

In step 110, the wiping speed mode of the wiper blades 28 and 30 is set to B shown in FIG. 9, and the process ends. In step 112, the wiping speed mode of the wiper blades 28 and 30 is set to B +, which is faster than B and slower than A shown in FIG. 9, and the process ends.

The processing process shown in FIG. 10 is similar to the processing process shown in FIG. 7, and the information display 202, which is a touch panel provided near, for example, the steering wheel 204 of the dashboard 200 of the vehicle shown in FIG. It is done using. Alternatively, it may be set using a device such as a personal computer connected to the vehicle ECU 90.

As described above, in the wiper device according to the present development example, the wiping speed of the wiper blades 28 and 30 depends on the presence or absence of the water-repellent coating on the surface of the windshield glass 12 and the presence or absence of the low μ coating of the wiper blades 28 and 30. By changing the mode, chattering of the wiper blades 28 and 30 can be suppressed without using a sensor for detecting chattering.

Further, the wiper device 10 according to the present development example chatters by wiping the wiper blades 28 and 30 in the wiping speed mode set according to the surface condition of the windshield glass 12 and the condition of the wiper blades 28 and 30. It is possible to prevent the user from being aware of the unpleasant phenomenon caused by the above.

[Second Embodiment]
Subsequently, a second embodiment of the present invention will be described. In this embodiment, the wiping speed mode of the wiper blades 28 and 30 is determined in consideration of the presence or absence of the water-repellent coating on the surface of the windshield glass 12 and the presence or absence of the low μ coating of the wiper blades 28 and 30. , It differs from the first embodiment in that the wiping speed mode is reviewed at the time of periodic inspection of the vehicle in consideration of deterioration over time, but the other configurations are the same as those of the first embodiment. The same reference numerals as those of the embodiments are used, and detailed description thereof will be omitted.

FIG. 11 is a flowchart showing an example of processing for setting the wiping speed mode of the wiper device 10 according to the present embodiment. In step 200, it is determined whether or not the surface of the windshield glass 12 is coated with a water repellent coating. In step 200, if the surface of the windshield glass 12 is coated with water-repellent coating, the procedure proceeds to step 202, and if the surface of the windshield glass 12 is not coated with water-repellent coating, the procedure proceeds to step 204.

In step 202, 3 points are added and the procedure shifts to step 206. In step 204, the procedure shifts to step 212 without adding points.

In step 206, it is determined whether or not a certain period of time has passed since the surface of the windshield glass 12 was coated with the water-repellent coating. The fixed period depends on the type of water-repellent coat, but as an example, it is six months to one year. If a certain period of time has passed since the surface of the windshield glass 12 was coated with water repellent in step 206, the procedure is shifted to step 208, and the surface of the windshield glass 12 is coated with water repellent for a certain period of time. If has not passed, the procedure proceeds to step 210.

In step 208, two points are added and the procedure shifts to step 212. In step 210, the procedure shifts to step 212 without adding points. In step 208, points may be added according to the elapsed period after the water repellent coating is applied. For example, after the water-repellent coating is performed, the fixed period in step 206 is set to one week or one month, and a predetermined score is added every week or one month in step 208.

In step 212, it is determined whether or not the wiper blades 28 and 30 are coated with a low μ coating. In step 212, if the wiper blades 28 and 30 have a low μ coating, the procedure proceeds to step 214, and if the wiper blades 28 and 30 do not have a low μ coating, the procedure proceeds to step 216. To do.

In step 214, two points are subtracted to move the procedure to step 218. In step 216, one score is added and the procedure shifts to step 218.

In step 218, it is determined whether or not a certain period of time has elapsed after the replacement of the wiper blades 28 and 30 (rubber). The fixed period depends on the types of wiper blades 28 and 30, but is, for example, half a year to one year.

In step 218, if a certain period of time has passed after the replacement of the wiper blades 28 and 30, the procedure is shifted to step 220, and if a certain period of time has not passed after the replacement of the wiper blades 28 and 30, the procedure is shifted to step 222. To do.

In step 220, two points are added and the procedure shifts to step 224. In step 222, the procedure shifts to step 224 without adding points. In step 220, points may be added according to the elapsed period after the replacement of the wiper blades 28 and 30. For example, after the wiper blades 28 and 30 are replaced, the fixed period in step 218 is set to one week or one month, and the predetermined score is added every week or one month in step 220.

In step 224, the total score is output and the process ends. In the present embodiment, the wiping speed modes of the wiper blades 28 and 30 are automatically set or manually set based on the total score output in step 224. The wiping speed mode is set to be faster as the total score is higher.

As an example, when the total score is 4 or more, the wiping speed mode is set to A + shown in FIG. If the total score is 2 or more and less than 4, the wiping speed mode is set to A shown in FIG. If the total score is 1, the wiping speed mode is set to B + shown in FIG. Then, when the total score is less than 1, the wiping speed mode is set to B shown in FIG.

As described above, the wiper device according to the present embodiment includes the presence / absence of a water-repellent coating on the surface of the windshield glass 12, the presence / absence of a low μ coating on the wiper blades 28 and 30, and the surface of the windshield glass 12. By changing the wiping speed mode of the wiper blades 28 and 30 according to the aging deterioration of the water-repellent coat and the wiper blades 28 and 30, the wiper blades 28 and 30 chatter without using a sensor for detecting chatter. Can be suppressed.

The friction between the surface of the windshield glass 12 and the wiper blades 28 and 30 is not only the presence or absence of the water-repellent coating on the surface of the windshield glass 12 and the presence or absence of the low μ coating of the wiper blades 28 and 30, but also the water-repellent coating or It is affected by the aging deterioration of the low μ coat. In the present embodiment, since the presence or absence of each of the water-repellent coat and the low μ coat and the aged deterioration are taken into consideration, it is possible to accurately set the wiping speed mode that can suppress the chattering of the wiper blades 28 and 30. Become.

[Development example of the second embodiment]
Subsequently, a development example of the second embodiment of the present invention will be described. In this development example, considering the aging deterioration of the water-repellent coating on the surface of the windshield glass 12 and the low μ coating of the wiper blades 28 and 30, the timing of re-implementation (renewal) of the water-repellent coating and the wiper blades 28 and 30 Although it differs from the first embodiment in that the replacement time is notified, since the other configurations are the same as those of the first embodiment, the same reference numerals as those of the first embodiment are given and detailed explanations are given. Omit.

FIG. 12 is a flowchart showing an example of the maintenance time notification process of the wiper device 10 according to the present development example. In step 300, it is determined whether or not the surface of the windshield glass 12 is coated with water repellent. In step 300, if the surface of the windshield glass 12 is coated with water-repellent coating, the procedure proceeds to step 302, and if the surface of the windshield glass 12 is not coated with water-repellent coating, the procedure proceeds to step 308.

In step 302, the date and time when the water-repellent coat is applied is acquired. The construction date and time may be read out from the construction date and time stored in the memory 60, or may be input by the operator.

In step 304, it is determined whether or not a certain period (re-implementation period) has elapsed since the surface of the windshield glass 12 was coated with the water-repellent coating. The fixed period depends on the type of water-repellent coat, but as an example, it is six months to one year. If a certain period of time has passed since the surface of the windshield glass 12 was coated with water repellent in step 304, the procedure is shifted to step 306, and a certain period of time has passed since the surface of the windshield glass 12 was coated with water repellent. If not, the procedure proceeds to step 308.

In step 306, the procedure shifts to step 308 by notifying that it is time to renew the water-repellent coat. The notification may be displayed on the information display 202 as characters, symbols or images indicating that the water-repellent coat needs to be updated, or may be output by voice from a speaker (not shown).

In step 308, the replacement date and time of the wiper blades 28 and 30 are acquired. The exchange date and time may be read out from the exchange date and time stored in the memory 60, or may be input by the operator.

In step 310, it is determined whether or not a certain period (replacement required period) has elapsed since the wiper blades 28 and 30 were replaced. The fixed period depends on the types of wiper blades 28 and 30, but is, for example, half a year to one year. When a certain period of time has elapsed from the replacement of the wiper blades 28 and 30 in step 310, the process ends by notifying that it is time to replace the wiper blades 28 and 40 in step 312. The notification may be displayed on the information display 202 as characters, symbols or images indicating that the wiper blades 28 and 30 need to be replaced, or may be output by voice from a speaker (not shown).

If a certain period of time has not passed since the replacement of the wiper blades 28 and 30 in step 310, the process ends without notifying the replacement time of the wiper blades 28 and 30.

As described above, the wiper device according to the present development example can notify the renewal time of the water-repellent coat on the surface of the windshield glass 12 and the replacement time of the wiper blades 28 and 30. By updating the water-repellent coat and replacing the wiper blades 28 and 30 according to the notification, the wiper blades 28 and 30 can be prevented from chattering.

Further, by using any of the first embodiment, the developed example of the first embodiment, and the second developed embodiment in combination with the present developed example, the wiper blade does not use a sensor for detecting chatter. It is possible to suppress the chattering of 28 and 30.

10 ... wiper device, 12 ... windshield glass, 14,16 ... wiper, 18 ... wiper motor, 20 ... link mechanism, 22 ... control circuit, 24,26 ... wiper arm, 28,30 ... wiper blade, 32 ... output shaft, 34 ... Crank arm, 36 ... Link rod, 38, 40 ... Pivot lever, 42, 44 ... Pivot shaft, 46 ... Link rod, 50 ... Wiper switch, 52 ... Reduction mechanism, 54 ... Rotation angle sensor, 56 ... Drive circuit, 57 ... Pump drive circuit, 58 ... Microcomputer, 60 ... Memory, 62 ... Washer switch, 64 ... Washer motor, 66 ... Washer pump, 66A ... Nozzle, 66B ... Pump housing, 66C ... Suction port, 66D ... Open discharge port, 66E ... Closed discharge port, 66F ... Valve, 66G ... Open washer liquid inlet, 66H ... Closed washer liquid inlet, 68 ... Washer liquid tank, 72A ... Open injection hose, 72B ... Closed injection hose, 74A ... Open injection nozzle, 74B ... Closed injection nozzle, 76A ... Open injection direction, 76B ... Closed injection direction, 78 ... Relay drive circuit, 80 ... FET drive circuit, 84 ... Relay unit, 84A ... First Terminal, 84B ... 2nd terminal, 84C ... common terminal, 88 ... wiper drive circuit, 90 ... vehicle ECU, 92 ... intermittent volume, 94 ... rain sensor, 98 ... predriver, 200 ... dashboard, 202 ... information display, 204 ... Steering wheel, RLY1, RLY2 ... Relay, θ1 ... Rotation angle, P1 ... Upside down position, P2 ... Downside upside down position, P3 ... Storage position,

Claims (4)

When the surface of the windshield is coated with water-repellent coating, the wiping speed of the wiper blade that wipes the windshield by the rotation of the wiper motor is set, and the wiping speed when the surface of the windshield is not coated with water-repellent coating is applied. The wiping speed setting unit that sets the speed faster than the speed,
A control unit that controls the rotation of the wiper motor so that the wiper blade operates at the wiping speed set by the wiping speed setting unit.
Wiper device including. When the water-repellent coating is not applied to the surface of the windshield and the wiper blade is subjected to the friction reduction treatment, the wiping speed setting unit sets the wiping speed of the wiper blade to the first wiping speed. When the water-repellent coating is not applied to the surface of the windshield and the wiper blade is not subjected to the friction reduction treatment, the wiping speed of the wiper blade is faster than the first wiping speed. When the second wiping speed is set, the water-repellent coating is applied to the surface of the windshield, and the wiper blade is subjected to friction reduction treatment, the wiping speed of the wiper blade is set to the second wiping speed. When the third wiping speed is set to a higher speed, the water-repellent coating is applied to the surface of the windshield, and the wiper blade is not subjected to the friction reduction treatment, the wiping speed of the wiper blade is set to the above. The wiper device according to claim 1, wherein the fourth wiping speed is set to be faster than the third wiping speed. When the water-repellent coating is applied to the surface of the windshield, the score is added, and when the wiper blade is subjected to the friction reduction treatment, the score is subtracted, and the progress after the water-repellent coating is applied. It includes a state evaluation unit that adds points according to the period and outputs the total score obtained by adding points according to the elapsed period after the replacement of the wiper blade.
The wiper device according to claim 1, wherein the wiper speed setting unit sets the wiper speed of the wiper blade at a higher speed as the total score increases. When the predetermined re-implementation period elapses after the implementation of the water-repellent coating, the notification that the re-implementation of the water-repellent coating is required is notified, and when the predetermined replacement period elapses after the replacement of the wiper blade, the said The wiper device according to any one of claims 1 to 3, which includes a state notification unit that notifies that the wiper blade needs to be replaced.