JP2017128185A - Wiping range expansion wiper device and control method of wiping range expansion wiper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiping range expansion wiper device which executes expansion of a wiping range according to a view angle of a driver and a control method of a wiping range expansion wiper device.SOLUTION: A microcomputer 58 calculates magnification of a front passenger seat side wiper arm based on change of a view angle of a driver. The microcomputer 58 rotates an output shaft of a second motor 12 in normal rotation at a rotation angle according to the calculated magnification when an output shaft of a first motor 11 is rotated in normal rotation and a front passenger seat side wiper blade 36 is moved from a lower inversion position P2P to an upper inversion position P1P, then moves a fifth axis line L5 which is a fulcrum of the front passenger seat side wiper arm 35 in an angle direction on an upper side of the front passenger seat side on a windshield glass 1, then rotates the output shaft of the second motor 12 in reverse rotation at a rotation angle according to the magnification and disposes the fifth axis line L5 to an original position until the front passenger seat side wiper blade 36 reaches the upper inversion position P1P.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for controlling a wiper device that can expand a wiping range.

  In a vehicle wiper device for wiping windshield glass or the like of an automobile, a wiper arm to which a wiper blade is attached is reciprocated between a lower inversion position and an upper inversion position by a wiper motor. In many cases, the trajectory of the operation of the wiper arm is substantially arc-shaped around the pivot axis of the wiper arm. Therefore, the wiping range, which is the area where the wiper blade wipes the windshield glass or the like, has a substantially sector shape with the pivot shaft as the center.

  In the vehicle wiper device, the windshield glass on the driver's seat side needs to be wiped preferentially in order to ensure the driver's visibility. Moreover, the windshield glass of an automobile has a substantially isosceles trapezoidal shape. Therefore, in the parallel (tandem) type wiper device in which the two wiper arms simultaneously rotate in the same direction, when the pivot shaft is provided below the windshield glass, the upper reversing position of the wiper blade on the driver's seat side is approximately The windshield glass having an isosceles trapezoid shape is provided in parallel with the leg at a position close to the driver's leg (the vertical side of the isosceles trapezoid shape).

  The upper reversal position of the wiper blade on the passenger seat side of the tandem wiper device is also provided in parallel with the driver seat side leg of the windshield glass in order to wipe off the windshield glass on the driver seat side preferentially. However, as described above, the wiping range of the wiper blade is substantially fan-shaped, so if the upper inversion position is provided at the above position, there is an area that is not wiped around the upper corner of the windshield glass on the passenger seat side. Arise.

  Patent Document 1 discloses a wiper device that expands the wiping range of the windshield glass on the passenger seat side by apparently extending the entire length of the operating wiper arm by making the link mechanism of the wiper device a so-called four-bar link. It is disclosed.

  As shown in FIG. 16, the wiper device described in Patent Document 1 transmits the driving force of the motor to the passenger-side wiper arm 150P via the four-bar linkage mechanism 160 so that the passenger-side wiper blade 154P The wiping range Z12 between the lower inversion position P4P and the upper inversion position P3P is wiped off. In FIG. 16, the wiping range Z10 is a wiping range in a wiper device that does not have the four-bar linkage mechanism 160 and moves the wiper arm around the pivot shaft. As shown in FIG. 16, the wiper device described in Patent Document 1 can wipe up to a portion near the upper corner of the windshield glass 1 on the passenger seat side more than a wiper device that does not have the four-bar linkage mechanism 160. It has become.

JP 2000-25578 A

  However, even in the wiper device described in Patent Document 1, as shown in FIG. 16, the extension of the wiper arm on the passenger seat side during operation is not sufficient, and the wiper device is left unwiped on the upper part of the windshield glass on the passenger seat side. There was a possibility that a certain non-wiping range 158 would occur. Moreover, the wiper device described in Patent Document 1 always extends the entire length of the operating wiper arm in order to expand the wiping range. As a result, there is a possibility that the occupant of the vehicle may feel uncomfortable with the operation of the wiper device.

  The present invention has been made in view of the above, and an object thereof is to provide a wiping range expanding wiper device and a wiping range expanding wiper device control method for executing expansion of the wiping range according to the viewing angle of the driver.

  In order to solve the above-mentioned problem, the wiper range expansion wiper device according to claim 1 has a first output shaft, and the rotation of the first output shaft causes the wiper arm to reciprocate around a fulcrum of the wiper arm, A wiper blade connected to the tip of the wiper arm has a first motor for reciprocally wiping the windshield between the upper reversing position and the lower reversing position of the windshield, and a second output shaft. By rotating the second output shaft, A rotation angle of the second output shaft is determined in accordance with a second motor that varies a wiping range of the windshield by the wiper blade, and a wiper arm enlargement ratio based on a change in the viewing angle of the driver; A control unit that performs control to rotate the second output shaft of the second motor at the determined rotation angle in synchronization with the reciprocating wiping operation of the wiper blade by rotation of the motor; It contains.

  This wiping range expanding wiper device varies (enlarges) the wiping range of the wiper blade according to the expansion rate of the wiper arm based on the change in the viewing angle of the driver. In the situation where the viewing angle of the driver is narrowed, the enlargement ratio is reduced to suppress the expansion of the wiping range, so that the vehicle occupant is less likely to feel uncomfortable with the operation of the wiper device.

  The wiping range expansion wiper device according to claim 2 further includes a rotation angle detection unit that detects a rotation angle of the first output shaft in the wiping range expansion wiper device according to claim 1, wherein the second motor includes: By rotating the second output shaft at the determined rotation angle, the fulcrum of the wiper arm is separated from the first position and the first position to the upper side of the passenger seat according to the determined rotation angle. The control unit moves the fulcrum of the wiper arm from the first position to the second position according to the rotation angle of the first output shaft detected by the rotation angle detection unit. The second motor is controlled so as to move between the two.

  The wiping range expansion wiper device rotates the second output shaft of the second motor according to the rotation angle of the first output shaft of the first motor at a rotation angle determined according to the enlargement ratio, thereby The wiper blade wiping range is varied in synchronization with the reciprocating wiping operation.

  The wiping range expansion wiper device according to claim 3 is the wiping range expansion wiper device according to claim 2, wherein the control unit is configured such that the rotation angle of the first output shaft detected by the rotation angle detection unit is The second output shaft is determined between the angle corresponding to one of the upper reverse position and the lower reverse position and the angle corresponding to the intermediate position between the upper reverse position and the lower reverse position. A wiping range expansion control is performed to rotate the wiper arm from the first position to the second position by rotating at a rotation angle, and the rotation angle of the first output shaft detected by the rotation angle detection unit is The second output shaft between the angle corresponding to the intermediate position between the upper reverse position and the lower reverse position and the angle corresponding to the other of the upper reverse position and the lower reverse position. The determined rotation angle In is rotated perform the fulcrum convergence control to move to the first position from the second position of the wiper arm.

  This wiper range expansion wiper device corresponds to an intermediate position between the upper reversal position and the lower reversal position after the rotation angle of the output shaft of the first motor reaches an angle corresponding to one of the upper reversal position and the lower reversal position. The output shaft of the second motor is rotated until the angle (intermediate angle) is reached, that is, until the wiper blade reaches between the upper reverse position and the lower reverse position.

  In this wiping range expansion wiper device, the rotation angle of the output shaft of the first motor detected by the rotation angle detection unit is from the intermediate angle to the angle corresponding to the other of the upper reverse position and the lower reverse position. In the meantime, the second motor is rotated to return the fulcrum of the wiper arm to the position before the movement. In this wiper range expansion wiper device, the wiper arm fulcrum is expanded on the passenger seat side of the windshield by returning the position of the fulcrum of the wiper arm to the position before the movement until the wiper blade reaches the upper reverse position or the lower reverse position. Can be executed without failure.

  The wiping range expansion wiper device according to claim 4 is the wiping range expansion wiper device according to any one of claims 1 to 3, wherein the control unit is configured to rotate the output shaft of the second motor with respect to the rotation angle of the output shaft of the first motor. A rotation angle of the output shaft of the second motor corresponding to the enlargement ratio is calculated based on a rotation angle control map that defines a change in rotation angle and the calculated enlargement ratio.

  According to the wiper range expanding wiper device, by using the rotation angle control map that defines the change in the rotation angle of the output shaft of the second motor with respect to the rotation angle of the output shaft of the first motor, the output shaft of the second motor The rotation can be synchronized with the rotation of the output shaft of the first motor.

  The wiping range expansion wiper device according to claim 5 is the wiping range expansion wiper device according to any one of claims 1 to 4, wherein the control unit increases the expansion rate as the detected vehicle speed increases. Decrease.

  According to this wiper range expanding wiper device, the occupant of the vehicle feels uncomfortable with the operation of the wiper device because the expansion rate is reduced and the expansion of the wiping range is suppressed according to the viewing angle of the driver that becomes narrower as the vehicle speed increases. The risk of memorizing is reduced.

  The wiping range expansion wiper device according to claim 6 is the wiping range expansion wiper device according to any one of claims 1 to 5, wherein the control unit decreases the expansion rate as brightness in front of the vehicle decreases. Let

  According to this wiping range expansion wiper device, the occupant of the vehicle operates the wiper device by reducing the expansion rate and suppressing the expansion of the wiping range according to the viewing angle of the driver that becomes narrower according to the brightness in front of the vehicle. There is less risk of feeling uncomfortable.

  A wiping range expansion wiper device according to a seventh aspect of the present invention is the wiping range expansion wiper device according to any one of the first to sixth aspects, wherein the control unit decreases the expansion rate as precipitation increases.

  According to this wiping range expansion wiper device, the occupant of the vehicle can control the operation of the wiper device by reducing the expansion rate and suppressing the expansion of the wiping range according to the viewing angle of the driver that becomes narrower as the precipitation increases. The risk of feeling uncomfortable is reduced.

  In order to solve the above-mentioned problem, the control method of the wiper range expansion wiper device according to claim 8 has a first output shaft, and the rotation of the first output shaft causes the wiper arm to reciprocate around the fulcrum of the wiper arm. Starting the rotation of the first output shaft of the first motor that causes the wiper blade connected to the tip of the wiper arm to perform a reciprocating wiping operation between the upper reversal position and the lower reversal position of the windshield; The rotation angle of the second output shaft of the second motor is determined according to the enlargement ratio of the wiper arm based on the change in the viewing angle, and in synchronization with the reciprocating wiping operation of the wiper blade by the rotation of the first motor An expansion / contraction step for varying the wiping range of the wiper blade by rotating the second output shaft of the second motor at the determined rotation angle.

  In this wiping range expanding wiper device control method, the wiping range of the wiper blade is varied in accordance with the expansion rate of the wiper arm based on the change in the viewing angle of the driver. In the situation where the viewing angle of the driver is narrowed, the enlargement ratio is reduced to suppress the expansion of the wiping range, so that the vehicle occupant is less likely to feel uncomfortable with the operation of the wiper device.

  The wiping range expansion wiper device control method according to claim 9 further includes a step of detecting a rotation angle of the first output shaft by a rotation angle detection unit in the wiping range expansion wiper device control method according to claim 8. The expansion / contraction step rotates the wiper arm by rotating the second output shaft of the second motor at the determined rotation angle according to the rotation angle of the first output shaft detected by the rotation angle detector. The fulcrum of the wiper blade is made variable by moving the fulcrum of the wiper blade between the first position and a second position away from the first position in accordance with the determined rotation angle.

  The control method of the wiping range expansion wiper device is to rotate the second output shaft of the second motor according to the rotation angle of the first output shaft of the first motor at a rotation angle determined according to the enlargement ratio. The wiping range of the wiper blade is varied in synchronization with the reciprocating wiping operation of the wiper blade.

  The wiping range expansion wiper device control method according to claim 10 is the wiping range expansion wiper device control method according to claim 9, wherein the expansion and contraction step is performed by adjusting the wiper arm according to the situation of the driver's viewing angle change information. An enlargement rate determining step for determining an enlargement rate; a second output shaft rotation angle determining step for determining a rotation angle of the second output shaft in accordance with the enlargement rate determined in the enlargement rate determining step; and the rotation angle detection The rotation angle of the first output shaft detected by the section corresponds to an intermediate position between the upper reverse position and the lower reverse position after reaching an angle corresponding to one of the upper reverse position and the lower reverse position. Until the angle is reached, the second output shaft is rotated at the rotation angle determined in the second output shaft rotation angle determination step, and the fulcrum of the wiper arm is moved from the first position to the second position. A wiping range expansion step for controlling the second motor so as to move, and a rotation angle of the first output shaft detected by the rotation angle detection unit is an intermediate position between the upper reverse position and the lower reverse position Rotation determined in the second output shaft rotation angle determination step from the angle corresponding to the second reverse rotation position to the angle corresponding to the other of the upper reverse position and the lower reverse position And a converging step for controlling the second motor so as to move the fulcrum of the wiper arm from the second position to the first position by rotating at an angle.

  The control method of the wiper range expanding wiper device is such that the rotation angle of the output shaft of the first motor becomes an intermediate between the upper reversal position and the lower reversal position after the rotation angle reaches one of the upper reversal position and the lower reversal position. The output shaft of the second motor is rotated until the angle corresponding to the position (intermediate angle) is reached, that is, until the wiper blade reaches between the upper reverse position and the lower reverse position.

  In this wiping range expansion wiper device control method, the rotation angle of the output shaft of the first motor detected by the rotation angle detection unit becomes an angle corresponding to the other of the upper reversal position and the lower reversal position after the intermediate angle is reached. Until then, the second motor is rotated to return the fulcrum of the wiper arm to the position before the movement. In this wiper range expansion wiper device, the wiper arm fulcrum is expanded on the passenger seat side of the windshield by returning the position of the fulcrum of the wiper arm to the position before the movement until the wiper blade reaches the upper reverse position or the lower reverse position. Can be executed without failure.

  The wiping range expansion wiper device control method according to claim 11 is the wiping range expansion wiper device control method according to claim 10, wherein the second output shaft rotation angle determination step is based on the rotation angle of the first output shaft. A rotation angle of the second output shaft corresponding to the enlargement ratio is determined based on a rotation angle control map that defines a change in the rotation angle of the second output shaft and the enlargement ratio determined in the enlargement ratio determination step.

  According to the control method of the wiper range expansion wiper device, by using the rotation angle control map that defines the change in the rotation angle of the output shaft of the second motor with respect to the rotation angle of the output shaft of the first motor, It becomes possible to synchronize the rotation of the output shaft with the rotation of the output shaft of the first motor.

  The wiping range expansion wiper device control method according to claim 12 is the wiping range expansion wiper device control method according to any one of claims 8 to 11, wherein the expansion / contraction step increases the speed of the detected vehicle. The enlargement ratio is decreased as the user proceeds.

  According to the control method of the wiper range expansion wiper device, the occupant of the vehicle can control the wiper device by reducing the expansion rate and suppressing the expansion of the wiping range according to the viewing angle of the driver that becomes narrower as the vehicle speed increases. The risk of feeling uncomfortable with the movement is reduced.

  The wiping range expansion wiper device control method according to claim 13 is the wiping range expansion wiper device control method according to any one of claims 8 to 12, wherein the expansion / contraction step decreases brightness in front of the vehicle. The enlargement ratio is reduced according to:

  According to the control method of the wiper range expansion wiper device, the occupant of the vehicle can wipe the wiper because the enlargement ratio is reduced and the expansion of the wiping range is suppressed according to the driver's viewing angle that becomes narrower according to the brightness in front of the vehicle. The risk of feeling uncomfortable with the operation of the device is reduced.

  The wiping range expansion wiper device control method according to claim 14 is the wiping range expansion wiper device control method according to any one of claims 8 to 13, wherein the expansion and contraction step is performed as the precipitation increases. Decrease rate.

  According to the control method of the wiper range expansion wiper device, the vehicle occupant can wipe the wiper device by reducing the expansion rate and suppressing the expansion of the wiping range according to the viewing angle of the driver that becomes narrower as the precipitation increases. There is less risk of feeling uncomfortable with the operation.

It is the schematic which showed an example of the wiper system for vehicles containing the wiping range expansion wiper apparatus which concerns on embodiment of this invention. It is a top view in the stop state of the wiping range expansion wiper device concerning an embodiment of the invention. It is sectional drawing of the 2nd holder member along the AA line of FIG. It is a top view in operation | movement of the wiping range expansion wiper apparatus which concerns on embodiment of this invention. It is a top view in operation | movement of the wiping range expansion wiper apparatus which concerns on embodiment of this invention. It is a top view in operation | movement of the wiping range expansion wiper apparatus which concerns on embodiment of this invention. It is a top view in operation | movement of the wiping range expansion wiper apparatus which concerns on embodiment of this invention. It is a top view in operation | movement of the wiping range expansion wiper apparatus which concerns on embodiment of this invention. It is a circuit diagram showing typically the circuit of the wiper system concerning an embodiment of the invention. An example of the 2nd output axis rotation angle map which specified the rotation angle of the 2nd output axis according to the rotation angle of the 1st output axis in an embodiment of the invention is shown. 5 is a flowchart illustrating an example of an enlargement ratio control process for controlling an enlargement ratio of a passenger-side wiper arm in accordance with a vehicle speed in the wiper system according to the embodiment of the present invention. It is the graph which showed an example of the correspondence of the viewing angle which is the range of a driver | operator's visual field, and the speed (vehicle speed) of vehicles. It is the schematic which showed the change according to the expansion rate of the rotation angle of the 2nd output shaft in embodiment of this invention. It is the schematic which showed an example of the change of the wiping range according to the expansion ratio X in embodiment of this invention. 10 is a flowchart showing a modification of the enlargement ratio control process for controlling the enlargement ratio of the passenger side wiper arm according to the speed of the vehicle in the wiper system according to the embodiment of the present invention. It is the schematic which showed an example of the wiper apparatus which has 4 link mechanism.

  FIG. 1 is a schematic view showing an example of a wiper system 100 including a wiping range expanding wiper device (hereinafter referred to as “wiper device”) 2 according to an embodiment of the present invention. A wiper system 100 shown in FIG. 1 is for wiping a windshield glass 1 as a “windshield” provided in a vehicle such as a passenger car, for example, and includes a pair of wiper arms (driver seat side wiper arms described later). 17 and the passenger seat side wiper arm 35), the first motor 11, the second motor 12, the control circuit 52, the drive circuit 56, and the washer device 70.

  Since FIG. 1 shows the case of a right-hand drive vehicle, the right side of the vehicle (left side in FIG. 1) is the driver's seat side, and the left side of the vehicle (right side in FIG. 1) is the passenger seat side. When the vehicle is a left-hand drive vehicle, the left side of the vehicle (right side in FIG. 1) is the driver's seat side, and the right side of the vehicle (left side in FIG. 1) is the passenger seat side. Further, when the vehicle is a left-hand drive vehicle, the configuration of the wiper device 2 is opposite to the left and right.

  The first motor 11 reciprocates each of the driver seat side wiper arm 17 and the passenger seat side wiper arm 35 on the windshield glass 1 by rotating the output shaft forward and backward within a range of a predetermined rotation angle. It is a driving source. In the present embodiment, when the first motor 11 rotates forward, the driver's seat side wiper arm 17 operates so that the driver's seat side wiper blade 18 wipes the upper inversion position P1D from the lower inversion position P2D. The wiper arm 35 operates so that the passenger-side wiper blade 36 wipes the upper inversion position P1P from the lower inversion position P2P. When the first motor 11 rotates in the reverse direction, the driver's seat side wiper arm 17 operates so that the driver's seat side wiper blade 18 wipes the upper inverted position P1D to the lower inverted position P2D, and the passenger seat side wiper arm 35 The passenger-side wiper blade 36 operates so as to wipe from the upper inversion position P1P to the lower inversion position P2P.

  The outer edge portion of the windshield glass 1 is a light-shielding portion 1A coated with a ceramic black pigment in order to block visible light and ultraviolet rays. The black pigment is applied to the outer edge of the windshield glass 1 on the vehicle interior side, and then melted by being heated at a predetermined temperature, and is fixed on the vehicle interior side surface of the windshield glass 1. The windshield glass 1 is fixed to the vehicle body by an adhesive applied to the outer edge portion. However, as shown in FIG. 1, the light shielding portion 1A that does not transmit ultraviolet rays is provided at the outer edge portion, so that the adhesive by ultraviolet rays is provided. Suppresses deterioration.

  When the second motor 12 described later does not operate, the output shaft of the first motor 11 (first output shaft 11A described later) is rotated from 0 ° to a predetermined rotation angle (hereinafter referred to as “first predetermined rotation angle”). By rotating in the forward and reverse directions up to the rotation angle, the driver seat side wiper blade 18 wipes the wiping range H1, and the passenger seat side wiper blade 36 wipes the wiping range Z1.

  The second motor 12 is positive at a rotation angle from 0 ° to a predetermined rotation angle (hereinafter referred to as “second predetermined rotation angle”) of an output shaft of the second motor 12 (second output shaft 12A described later). This is a drive source that apparently extends the wiper arm 35 on the passenger seat side by rotating and reversely rotating. By operating the second motor 12 while the first motor 11 is operating, the passenger seat side wiper arm 35 is apparently extended upward on the passenger seat side, and the passenger seat side wiper blade 36 wipes the wiping range Z2. Further, by changing the magnitude of the second predetermined rotation angle, it is possible to change the range in which the passenger seat side wiper arm 35 extends. For example, if the second predetermined rotation angle is increased, the range in which the passenger seat side wiper arm 35 extends is increased, and if the second predetermined rotation angle is decreased, the range in which the passenger seat side wiper arm 35 is extended is decreased.

  The first motor 11 and the second motor 12 are motors that can control the rotation direction of each output shaft to forward rotation and reverse rotation, and can also control the rotation speed of each output shaft. Either a DC motor or a brushless DC motor.

  A control circuit 52 for controlling each rotation is connected to the first motor 11 and the second motor 12. The control circuit 52 according to the present embodiment includes, for example, an absolute angle sensor (not shown) as a “rotation angle detector” provided near the output shaft ends of the first motor 11 and the second motor 12. The duty ratio of the voltage applied to each of the first motor 11 and the second motor 12 based on the detected rotation direction, rotation position, rotation speed, and rotation angle of the output shaft of each of the first motor 11 and the second motor 12. Is calculated.

  In the present embodiment, the voltage applied to each of the first motor 11 and the second motor 12 is a pulse width that modulates the voltage (approximately 12V) of the on-vehicle battery as a power source by turning on and off the switching element by a switching element. Generated by modulation (PWM). In this embodiment, the duty ratio is a ratio of the time of one pulse generated when the switching element is turned on with respect to one period of a waveform of a voltage generated by PWM. One period of the waveform of the voltage generated by PWM is the sum of the time of the one pulse described above and the time during which the switching element is turned off and no pulse is generated. The drive circuit 56 turns on and off switching elements in the drive circuit 56 in accordance with the duty ratio calculated by the control circuit 52 to generate voltages to be applied to the first motor 11 and the second motor 12, and the generated voltages are supplied to the first circuit. The voltage is applied to each winding terminal of the first motor 11 and the second motor 12.

  Since each of the first motor 11 and the second motor 12 according to the present embodiment has a speed reduction mechanism composed of a worm gear, the rotation direction, the rotation speed, and the rotation angle of each output shaft are the first The rotation speed and rotation angle of the motor 11 main body and the second motor 12 main body are not the same. However, in the present embodiment, each motor and each speed reduction mechanism are inseparably configured. Therefore, hereinafter, the rotation speed and the rotation angle of each output shaft of the first motor 11 and the second motor 12 are expressed as follows. The rotation direction, rotation speed, and rotation angle of each of the first motor 11 and the second motor 12 are considered.

  The absolute angle sensor is provided, for example, in each speed reduction mechanism of the first motor 11 and the second motor 12, and converts the magnetic field (magnetic force) of an excitation coil or a magnet that rotates in conjunction with each output shaft into a current. It is a sensor to detect, for example, a magnetic sensor such as an MR sensor.

  The control circuit 52 determines the position of the driver's seat side wiper blade 18 on the windshield glass 1 from the rotation angle of the output shaft of the first motor 11 detected by an absolute angle sensor provided near the output shaft end of the first motor. A computable microcomputer 58 is provided. The microcomputer 58 controls the drive circuit 56 so that the rotational speed of the output shaft of the first motor 11 changes according to the calculated position.

  Further, the microcomputer 58 detects the rotation angle of the output shaft of the first motor 11 detected by the absolute angle sensor provided near the output shaft end of the first motor on the windshield glass 1 of the passenger side wiper blade 36. The position is calculated, and the drive circuit 56 is controlled so that the rotational speed of the output shaft of the second motor 12 changes according to the calculated position. Further, the microcomputer 58 calculates the degree of extension of the passenger seat side wiper arm 35 from the rotation angle of the output shaft of the second motor 12 detected by the absolute angle sensor provided near the output shaft end of the second motor 12.

  The control circuit 52 is provided with a memory 60 that is a storage device that stores data and programs used to control the drive circuit 56. The memory 60 stores the first motor 11 and the second motor 12 according to the rotation angle of the output shaft of the first motor 11 indicating the positions of the driver-side wiper blade 18 and the passenger-side wiper blade 36 on the windshield glass 1. Data and a program for calculating the rotation speed and the like (including the rotation angle) of each output shaft are stored.

  The microcomputer 58 is connected to a vehicle ECU (Electronic Control Unit) 90 that controls the vehicle engine and the like. The vehicle ECU 90 includes a wiper switch 50, a direction indicator switch 54, a washer switch 62, a rain sensor 76, a vehicle speed sensor 92 that detects the speed of the vehicle, an in-vehicle camera 94 that captures the front of the vehicle, a GPS (Global Positioning System). ) A device 96 and a steering angle sensor 98 are connected.

  The wiper switch 50 is a switch for turning on or off the power supplied from the vehicle battery to the first motor 11. The wiper switch 50 is a low-speed operation mode selection position for operating the driver-side wiper blade 18 and the passenger-side wiper blade 36 at a low speed, a high-speed operation mode selection position for operating at a high speed, and an intermittent operation that operates intermittently at a constant cycle. The mode selection position can be switched to an AUTO (auto) operation mode selection position and a storage (stop) mode selection position that are operated when the rain sensor 76 detects raindrops. Further, a signal corresponding to the selected position of each mode is output to the microcomputer 58 via the vehicle ECU 90.

  When a 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 to control corresponding to the output signal from the wiper switch 50. This is done using stored data and programs.

  In the present embodiment, the wiper switch 50 may be separately provided with an expansion mode switch that changes the wiping range of the passenger side wiper blade 36 to the wiping range Z2. When the enlargement mode switch is turned on, a predetermined signal is input to the microcomputer 58 via the vehicle ECU 90. When a predetermined signal is input to the microcomputer 58, for example, when the passenger seat wiper blade 36 operates from the lower inversion position P2P to the upper inversion position P1P, the second motor 12 is configured to wipe the wiping range Z2. To control.

  The direction indicator switch 54 is a switch for instructing the operation of a vehicle direction indicator (not shown). A signal for turning on the right or left direction indicator is operated to the vehicle ECU 90 by a driver's operation. Output. The vehicle ECU 90 causes the right or left direction indicator lamp to blink based on the signal output from the direction indicator switch 54. A signal output from the direction indicator switch 54 is also input to the microcomputer 58 via the vehicle ECU 90.

  The washer switch 62 is a switch that turns on or off the power supplied from the vehicle battery to the washer motor 64, the first motor 11, and the second motor 12. For example, the washer switch 62 is provided integrally with an operating means such as a lever provided with the wiper switch 50 described above, and is turned on by an operation such as pulling the lever or the like by a passenger. When the washer switch 62 is turned on, the microcomputer 58 operates the washer motor 64 and the first motor 11. When the wiper blade 36 on the passenger side wipes from the lower reverse position P2P to the upper reverse position P1P, the microcomputer 58 wipes the wiper blade 36 from the upper reverse position P1P so as to wipe the wiping range Z2. When wiping up to the reverse position P2P, the second motor 12 is controlled so as to wipe the wiping range Z1. With this control, the passenger seat side of the windshield glass 1 can be wiped widely.

  While the washer switch 62 is on, the washer pump 66 is driven by the rotation of the washer motor 64 provided in the washer device 70. The washer pump 66 pumps the washer liquid in the washer liquid tank 68 to the driver side hose 72A or the passenger side hose 72B. The driver seat side hose 72A is connected to a driver seat side nozzle 74A provided below the driver seat side of the windshield glass 1. Further, the passenger seat side hose 72B is connected to a passenger seat side nozzle 74B provided below the windshield glass 1 on the passenger seat side. The pumped washer liquid is sprayed onto the windshield glass 1 from the driver seat side nozzle 74A and the passenger seat side nozzle 74B. The washer liquid adhering to the windshield glass 1 is wiped together with dirt on the windshield glass 1 by the operating driver side wiper blade 18 and the passenger seat side wiper blade 36.

  The microcomputer 58 controls the washer motor 64 so that it operates only while the washer switch 62 is on. Further, the microcomputer 58 controls the first motor 11 so that the operation continues until the driver-side wiper blade 18 and the passenger-side wiper blade 36 reach the lower inversion positions P2D and P2P even when the washer switch 62 is turned off. Control. Further, when the washer switch 62 is turned off when the driver-side wiper blade 18 and the passenger-side wiper blade 36 are wiping toward the upper inversion positions P1D and P1P, the microcomputer 58 The second motor 12 is controlled to wipe the wiping range Z2 until the wiper blade 18 and the passenger side wiper blade 36 reach the upper inversion positions P1D and P1P by the rotation of the first motor 11.

  The rain sensor 76 is a kind of optical sensor provided on the vehicle interior side of the windshield glass 1, for example, and detects water droplets on the surface of the windshield glass 1. As an example, the rain sensor 76 includes 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 1, but if there are water droplets on the surface of the windshield glass 1, some of the infrared rays are transmitted through the water droplets and emitted to the outside. The amount of reflection decreases. As a result, the amount of light entering the photodiode that is the light receiving element is reduced. Based on the decrease in the amount of light, water droplets on the surface of the windshield glass 1 are detected.

  The vehicle speed sensor 92 is a sensor that detects the rotational speed of the vehicle wheel and outputs a signal indicating the rotational speed. The vehicle ECU 90 calculates the vehicle speed from the signal output from the vehicle speed sensor 92 and the circumference of the wheel.

  The in-vehicle camera 94 is a device that captures the front of the vehicle and acquires moving image data. The vehicle ECU 90 can determine whether the vehicle is approaching a curve or the like by performing image processing on moving image data acquired by the in-vehicle camera 94. Further, the vehicle ECU 90 can calculate the brightness in front of the vehicle from the luminance of the moving image data acquired by the in-vehicle camera 94.

  The GPS device is a device that calculates the current position of the vehicle based on a positioning signal received from a GPS satellite in the sky. In the present embodiment, the GPS device 96 dedicated to the wiper system 100 is used. However, when the vehicle includes another GPS device such as a car navigation system, the other GPS device may be used.

  As an example, the steering angle sensor 98 is a sensor that is provided on a rotation shaft (not shown) of the steering and detects the rotation angle of the steering.

  Hereinafter, the configuration of the wiper apparatus 2 according to the present embodiment will be described with reference to FIGS. As shown in FIGS. 2 and 4 to 8, the wiper device 2 according to the present embodiment has a plate-like central frame 3 and one end fixed to the central frame 3, and both sides in the vehicle width direction from the central frame 3. A pair of pipe frames 4 and 5 are provided. A first holder member 6 including a driver seat side pivot shaft 15 of the driver seat side wiper arm 17 and the like is formed at the other end portion of the pipe frame 4. Further, the second holder member 7 provided with the second passenger seat side pivot shaft 22 of the passenger seat side wiper arm 35 and the like is formed at the other end portion of the pipe frame 5. The wiper device 2 is supported on the vehicle by a support portion 3A provided on the central frame 3, and each of the fixing portion 6A of the first holder member 6 and the fixing portion 7A of the second holder member 7 is attached to the vehicle by a bolt or the like. By being fastened, it is fixed to the vehicle.

  The wiper device 2 includes a first motor 11 and a second motor 12 for driving the wiper device 2 on the back surface (the surface facing the vehicle compartment side) of the central frame 3. The first output shaft 11A of the first motor 11 passes through the central frame 3 and protrudes from the surface of the central frame 3 (surface on the outside of the vehicle). One end of 13 is fixed. The second output shaft 12A of the second motor 12 passes through the central frame 3 and protrudes from the surface of the central frame 3, and one end of the second drive crank arm 14 is fixed to the tip of the second output shaft 12A. .

  A driver seat side pivot shaft 15 is rotatably supported by the first holder member 6, and one end of the driver seat side swing lever 16 is provided at the base end portion (the back side in FIG. 2) of the driver seat side pivot shaft 15. The arm head of the driver's seat side wiper arm 17 is fixed to the tip of the driver's seat side pivot shaft 15 (front side in FIG. 2). As shown in FIG. 1, a driver seat side wiper blade 18 for wiping the driver seat side of the windshield glass 1 is connected to the tip of the driver seat side wiper arm 17.

  The other end of the first drive crank arm 13 and the other end of the driver seat side swing lever 16 are connected via a first connecting rod 19. When the first motor 11 is driven, the first drive crank arm 13 rotates, and the rotational force is transmitted to the driver seat side swing lever 16 via the first connecting rod 19, and the driver seat side swing lever 16. Sway. When the driver seat side swing lever 16 is swung, the driver seat side wiper arm 17 is also swung, and the driver seat side wiper blade 18 wipes the wiping range H1 between the lower inversion position P2D and the upper inversion position P1D.

  FIG. 3 is a cross-sectional view of the second holder member 7 taken along the line AA of FIG. As shown in FIG. 3, the first holder seat side pivot shaft 21 is supported on the second holder member 7 so as to be rotatable about the first axis L1, and the second passenger seat side pivot shaft 22 is secondly supported. It is supported so as to be rotatable about the axis L2. In the present embodiment, the first axis L1 and the second axis L2 are arranged on the same straight line L (concentric). 3 shows a state where the waterproof cover K shown in FIGS. 2 and 4 to 8 is removed.

  A cylindrical portion 7B is formed in the second holder member 7, and the first passenger seat side pivot shaft 21 is rotatably supported via a bearing 23 on the inner peripheral side of the cylindrical portion 7B. The first passenger seat side pivot shaft 21 is formed in a cylindrical shape, and the second passenger seat side pivot shaft 22 is rotatably supported via a bearing 24 on the inner peripheral side of the first passenger seat side pivot shaft 21. .

  One end of the first passenger seat side swing lever 25 is fixed to the base end portion of the first passenger seat side pivot shaft 21, and the first drive lever 26 has a first drive lever 26 attached to the distal end portion of the first passenger seat side pivot shaft 21. One end is fixed. As shown in FIG. 2, the other end of the first passenger seat side swing lever 25 and the other end of the driver seat side swing lever 16 are connected by a second connecting rod 27. Accordingly, when the first motor 11 is driven and the driver's seat side swing lever 16 is pivoted, the second connecting rod 27 transmits the driving force to the first passenger's seat side swing lever 25 and the first passenger seat side swing lever. 25, the first drive lever 26 is swung (rotated) around the first axis L1.

   As shown in FIG. 3, the second passenger seat side pivot shaft 22 is formed longer than the first passenger seat side pivot shaft 21, and the base end portion and the distal end portion of the second passenger seat side pivot shaft 22 are the first. One end of a second passenger seat side swinging lever 28 is fixed to the base end portion of the second passenger seat side pivot shaft 21 so as to protrude in the axial direction from the passenger seat side pivot shaft 21. One end of the second drive lever 29 is fixed to the tip portion.

  The other end of the second drive crank arm 14 and the other end of the second passenger seat side swing lever 28 are connected by a third connecting rod 31. Therefore, when the second motor 12 is driven, the second drive crank arm 14 rotates, and the third connecting rod 31 transmits the driving force of the second drive crank arm 14 to the second passenger seat side swing lever 28. The second drive lever 29 is swung (rotated) together with the second passenger seat-side rocking lever 28. As described above, the first passenger seat side pivot shaft 21 and the second passenger seat side pivot shaft 22 are provided coaxially, but the first passenger seat side pivot shaft 21 and the second passenger seat side pivot shaft 22 are not mutually connected. The first passenger seat side pivot shaft 21 and the second passenger seat side pivot shaft 22 are not interlocked and rotate independently of each other.

  As shown in FIGS. 2 and 4 to 8, the wiper device 2 includes a first driven lever having a base end portion rotatably connected around the third axis L <b> 3 on the other end side of the first drive lever 26. 32.

  The wiper device 2 has a base end portion coupled to be rotatable about a fourth axis L4 on the distal end side of the first driven lever 32 and a fifth axis L5 on the other end side of the second drive lever 29. An arm head 33 which is a second driven lever having a distal end connected to be rotatable about the center is provided. The arm head 33 constitutes a passenger-side wiper arm 35 together with a retainer 34 whose base end is fixed to the distal end of the arm head 33. A front passenger side wiper blade 36 for wiping the front passenger side of the windshield glass 1 is connected to the front end of the front passenger side wiper arm 35.

  The first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 have a length from the first axis L1 (second axis L2) to the third axis L3, and from the fourth axis L4 to the fifth. It connects so that the length to the axis line L5 may become the same. The first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 have a length from the third axis L3 to the fourth axis L4, and the first axis L1 (second axis L2) to the fifth. It connects so that the length to the axis line L5 may become the same. Accordingly, the first drive lever 26 and the arm head 33 are kept parallel, and the second drive lever 29 and the first driven lever 32 are kept parallel. The first drive lever 26 and the second drive lever 29, the 1st driven lever 32, and the arm head 33 comprise the link mechanism of a substantially parallelogram shape.

  The fifth axis L5 is a fulcrum when the passenger-side wiper arm 35 operates. The passenger-side wiper arm 35 is rotated about the fifth axis L5 by the driving force of the first motor 11 to windshield glass. Reciprocates on 1. Further, the second motor 12 passes the fifth axis L5 through a substantially parallelogram link mechanism including the first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33. As shown in FIGS. 4-6, it moves above the windshield glass 1 rather than the case of FIG.2, FIG7 and FIG.8. By such movement of the fifth axis L5, the passenger side wiper arm 35 is apparently extended. Accordingly, when the second motor 12 is operated together with the first motor 11, the passenger side wiper blade 36 wipes the wiping range Z2.

  When the second motor 12 does not operate and only the first motor 11 operates, the fifth axis L5 starts from the position shown in FIGS. 2, 7, and 8 (hereinafter referred to as “first position”). It does n’t move. Accordingly, the passenger side wiper arm 35 operates between the lower inversion position P2P and the upper inversion position P1P while drawing a substantially arc-shaped locus around the fifth axis L5 whose position does not change, and the passenger seat side wiper blade 36 The substantially fan-shaped wiping range Z1 is wiped.

  In the present embodiment, when it is necessary to wipe the windshield glass 1 widely, the wiping range Z2 is wiped when the passenger seat wiper blade 36 moves from the lower inversion position P2P to the upper inversion position P1P. Thus, the first motor 11 and the second motor 12 are each controlled. Then, the first motor 11 and the second motor 12 are respectively controlled so as to wipe the wiping range Z1 when the passenger seat wiper blade 36 reversed at the upper reversing position P1P moves toward the lower reversing position P2P. . When the passenger-side wiper blade 36 reciprocates between the lower inversion position P2P and the upper inversion position P1P, the wiping range Z2 is wiped in the forward movement and the wiping range Z1 is wiped in the backward movement. 1 wide range can be wiped off. Alternatively, when the passenger-side wiper blade 36 reciprocates between the lower inversion position P2P and the upper inversion position P1P, the wiping range Z1 is wiped in the forward movement and the wiping range Z2 is wiped in the backward movement. A wide range of windshield glass 1 can be wiped off. Alternatively, the wiping range Z2 may be wiped at the time of forward movement and backward movement.

  Hereinafter, the operation of the wiper device 2 according to the present embodiment will be described. In the present embodiment, the driver-seat-side wiper arm 17 and the driver-seat-side wiper blade 18 only operate around the driver-seat-side pivot shaft 15 according to the rotation of the first motor 11. The operation of the passenger side wiper blade 36 will be described in detail.

  FIG. 2 shows a state in which the passenger seat side wiper blade 36 is positioned at the lower inversion position P2P, and the passenger seat side wiper arm 35 is in the stop position. In this state, when the washer switch 62 or the enlargement mode switch is turned on, the first output shaft 11A of the first motor 11 is rotated in the rotation direction CC1 shown in FIG. The first drive lever 26 starts rotating, and the passenger seat side wiper arm 35 starts rotating around the fifth axis L5. At the same time, the second output shaft 12A of the second motor 12 also starts to rotate in the rotational direction CC2 shown in FIG. In the present embodiment, the rotation in the rotation direction CC1 of the first output shaft 11A and the rotation in the rotation direction CC2 of the second output shaft 12A are defined as positive rotations in the respective output shafts.

  FIG. 4 shows a state in which the passenger-side wiper blade 36 wipes the windshield glass 1 halfway (approximately ¼ of the forward travel). In the present embodiment, when the first motor 11 starts to rotate in the rotation direction CC <b> 1, the driving force generated by the rotation of the second motor 12 in the rotation direction CC <b> 2 is transmitted to the second drive lever 29. The second drive lever 29 to which the driving force of the second motor 12 is transmitted operates in the operation direction CW3, and the fifth axis L5, which is a fulcrum of the passenger seat side wiper arm 35, is located above the passenger seat side of the windshield glass 1. Move towards.

  FIG. 5 shows that when the first output shaft 11A is rotated to an intermediate rotation angle between 0 ° and the first predetermined angle, the first drive lever 26 is further rotated, and the front passenger side wiper blade 36 is in the lower inverted position. This shows a case where a substantially intermediate point of the stroke (forward stroke) between P2P and the upper reverse position P1P is reached. In FIG. 5, the second output shaft 12A of the second motor 12 is also rotated to the second predetermined rotation angle in the rotation direction CC2 shown in FIG. Due to the maximum rotation angle of the second output shaft 12A in the forward rotation, the fifth axis L5, which is the fulcrum of the passenger-side wiper arm 35, is connected to the second drive crank arm 14, the third connecting rod 31, the second The passenger seat side swing lever 28 and the second drive lever 29 are lifted to the uppermost position (second position). As a result, the front end portion of the passenger seat side wiper blade 36 is moved to a position near the upper corner of the windshield glass 1 on the passenger seat side, as shown in FIG. The intermediate rotation angle described above is about half of the first predetermined rotation angle, but is set individually according to the shape of the windshield glass 1 and the like. Note that the second position is a position at which the fifth axis L5 is disposed at the uppermost position in each magnification. Specifically, the second position is determined when the first output shaft 11A is between 0 ° and the first predetermined angle when the passenger-side wiper blade wipes a range wider than the wiping range Z1 (for example, the wiping range Z2). This is the position at which the fifth axis L5 is arranged when rotated to the intermediate rotation angle.

  FIG. 6 shows that when the first drive lever 26 is further rotated, the passenger-side wiper blade 36 reaches approximately 3/4 of the stroke (forward stroke) between the lower inversion position P2P and the upper inversion position P1P. Shows the case. In FIG. 6, the rotation direction of the first output shaft 11A of the first motor 11 is the same as that of FIGS. 4 and 5, but the second output shaft 12A of the second motor 12 is opposite to the case of FIGS. It rotates in the rotation direction CW2 (reverse rotation). When the second output shaft 12A rotates in the rotation direction CW2, the second drive lever 29 operates in the operation direction CC3, and the fifth axis L5, which is a fulcrum of the passenger seat side wiper arm 35, is moved downward from the second position. The As a result, the front passenger side wiper blade 36 moves on the windshield glass 1 while wiping the wiping range Z2 while drawing the locus indicated by the broken line above the wiping range Z2 shown in FIG.

  FIG. 7 shows a case where the first output shaft 11A of the first motor 11 rotates forward to the first predetermined rotation angle and the second output shaft 12A of the second motor 12 rotates reversely at the second predetermined rotation angle. Yes. Since the rotation angle of the first output shaft 11A of the first motor 11 in the forward rotation is maximized, the driver seat side wiper arm 17 and the driver seat side wiper blade 18 reach the upper inversion position P1D. Further, the second output shaft 12A of the second motor 12 is reversed at the second predetermined rotation angle from the state shown in FIG. 5 (the state where the second output shaft 12A has reached the second predetermined rotation angle by forward rotation). Due to the rotation, the fifth axis L5, which is the fulcrum of the passenger-side wiper arm 35, is at the first position, which is the position before the second output shaft 12A of the second motor 12 shown in FIG. I'm back. As a result, the passenger seat side wiper arm 35 and the passenger seat side wiper blade 36 reach the same upper inversion position P1P as the wiping range Z1 when the second motor 12 is not driven.

  FIG. 8 shows a state in which the driver's seat side wiper arm 17 and the driver's seat side wiper blade 18 and the passenger's seat side wiper arm 35 and the passenger's seat side wiper blade 36 move from the upper inverted positions P1D and P1P to the lower inverted positions P2D and P2P. The state (return stroke) is shown. At the time of reverse movement, the first output shaft 11A of the first motor 11 rotates in the reverse direction, and rotates in the rotation direction CW1 in the direction opposite to that in the case of FIGS. However, the second output shaft 12A of the second motor 12 does not rotate, and therefore the fifth axis L5, which is a fulcrum of the passenger seat side wiper arm 35, does not move from the first position, so the first output shaft 11A of the first motor 11 does not move. Is reversely rotated, the passenger seat side wiper arm 35 draws a substantially arc-shaped locus. As a result, the passenger side wiper blade 36 connected to the front end of the passenger side wiper arm 35 wipes the wiping range Z1.

  FIG. 9 is a circuit diagram schematically showing a circuit of the wiper system 100 according to the present embodiment. As shown in FIG. 9, the wiper system 100 includes a control circuit 52 and a drive circuit 56.

  As described above, the control circuit 52 includes the microcomputer 58 and the memory 60. The microcomputer 58 includes a wiper switch 50, a direction indicator switch 54, a washer switch 62, a vehicle ECU 90 (not shown), A rain sensor 76, a vehicle speed sensor 92, an in-vehicle camera 94, a GPS device 96, and a steering angle sensor 98 are connected to each other.

  The drive circuit 56 includes a first pre-driver 104 and a first motor drive circuit 108 for driving the first motor 11, and a second pre-driver 106 and a second motor drive circuit 110 for driving the second motor 12. ing. The drive circuit 56 includes a relay drive circuit 78, an FET drive circuit 80, and a washer motor drive circuit 57 for driving the washer motor 64.

  The microcomputer 58 of the control circuit 52 rotates the first motor 11 via the second pre-driver 106 by turning on and off the switching elements constituting the first motor driving circuit 108 via the first pre-driver 104. The rotation of the second motor 12 is controlled by turning on and off the switching elements of the two-motor drive circuit 110. The microcomputer 58 controls the rotation of the washer motor 64 by controlling the relay drive circuit 78 and the FET drive circuit 80.

  When the first motor 11 and the second motor 12 are DC motors with brushes, the first motor driving circuit 108 and the second motor driving circuit 110 each include four switching elements. The switching element is, for example, an N-type FET (field effect transistor).

  As shown in FIG. 9, the first motor drive circuit 108 includes FETs 108 </ b> A to 108 </ b> D. The FET 108 </ b> A has a drain connected to the power supply (+ B), a gate connected to the first pre-driver 104, and a source connected to one end of the first motor 11. The FET 108 </ b> B has a drain connected to the power supply (+ B), a gate connected to the first pre-driver 104, and a source connected to the other end of the first motor 11. The FET 108C has a drain connected to one end of the first motor 11, a gate connected to the first pre-driver 104, and a source grounded. The FET 108D has a drain connected to the other end of the first motor 11, a gate connected to the first pre-driver 104, and a source grounded.

  The first pre-driver 104 controls driving of the first motor 11 by switching a control signal supplied to the gates of the FETs 108 </ b> A to 108 </ b> D according to a control signal from the microcomputer 58. That is, when the first pre-driver 104 rotates the first output shaft 11A of the first motor 11 in a predetermined direction (forward rotation), the first pre-driver 104 turns on the set of the FET 108A and the FET 108D and the first output of the first motor 11 When rotating the shaft 11A in the direction opposite to the predetermined direction (reverse rotation), the set of the FET 108B and the FET 108C is turned on. Further, the first pre-driver 104 performs PWM for intermittently turning on and off the FET 108A and the FET 108D based on a control signal from the microcomputer 58.

  The first pre-driver 104 controls the rotational speed of the first motor 11 in the forward rotation by changing the duty ratio related to on / off of the FET 108A and the FET 108D by PWM. If the duty ratio is increased, the effective value of the voltage applied to the terminal of the first motor 11 during forward rotation is increased, and the rotation speed of the first motor 11 is increased.

  Similarly, the first pre-driver 104 controls the rotational speed at the reverse rotation of the first motor 11 by changing the duty ratio related to the on / off of the FET 108B and the FET 108C by PWM. If the duty ratio increases, the effective value of the voltage applied to the terminal of the first motor 11 during reverse rotation increases, and the rotation speed of the first motor 11 increases.

  The second motor drive circuit 110 includes FETs 110A to 110D. The FET 110 </ b> A has a drain connected to the power supply (+ B), a gate connected to the second pre-driver 106, and a source connected to one end of the second motor 12. The FET 110 </ b> B has a drain connected to the power supply (+ B), a gate connected to the second pre-driver 106, and a source connected to the other end of the second motor 12. The FET 110C has a drain connected to one end of the second motor 12, a gate connected to the second pre-driver 106, and a source grounded. The FET 110D has a drain connected to the other end of the second motor 12, a gate connected to the second pre-driver 106, and a source grounded.

  The second pre-driver 106 controls driving of the second motor 12 by switching a control signal supplied to the gates of the FETs 110 </ b> A to 110 </ b> D according to a control signal from the microcomputer 58. That is, when the second pre-driver 106 rotates the second output shaft 12A of the second motor 12 in a predetermined direction (forward rotation), the second pre-driver 106 turns on the set of the FET 110A and the FET 110D and outputs the second output of the second motor 12. When rotating the shaft 12A in the direction opposite to the predetermined direction (reverse rotation), the set of the FET 110B and the FET 110C is turned on. The second pre-driver 104 controls the rotational speed of the second motor 12 by performing PWM like the first pre-driver 104 described above based on the control signal from the microcomputer 58.

  A two-pole sensor magnet 112A is fixed to the output shaft end portion 112 of the first output shaft 11A in the speed reduction mechanism of the first motor 11, and a first absolute angle sensor 114 is provided so as to face the sensor magnet 112A. ing.

  A two-pole sensor magnet 116A is fixed to the output shaft end portion 116 of the second output shaft 12A in the speed reduction mechanism of the second motor 12, and a second absolute angle sensor 118 is provided so as to face the sensor magnet 116A. ing.

  The first absolute angle sensor 114 detects the magnetic field of the sensor magnet 112A, and the second absolute angle sensor 118 detects the magnetic field of the sensor magnet 116A, and outputs a signal corresponding to the detected magnetic field strength. The microcomputer 58 determines the rotational angle and rotational position of each of the first output shaft 11A of the first motor 11 and the second motor 12 based on the signals output from the first absolute angle sensor 114 and the second absolute angle sensor 118, respectively. The rotation direction and the rotation speed are calculated.

  From the rotation angle of the first output shaft 11A of the first motor 11, the position between the lower inversion position P2D and the upper inversion position P1D of the driver seat side wiper blade 18 can be calculated. Further, from the rotation angle of the second output shaft 12A of the second motor 12, the degree of apparent extension (degree of enlargement) of the passenger-side wiper arm 35 can be calculated. The microcomputer 58 determines the rotation angle of the second output shaft 12A based on the position between the lower inversion position P2D and the upper inversion position P1D of the driver seat wiper blade 18 calculated from the rotation angle of the first output shaft 11A. By controlling the above, the operations of the first motor 11 and the second motor 12 are synchronized. As an example, in the memory 60, the position (or the rotation angle of the first output shaft 11A) between the lower inversion position P2D and the upper inversion position P1D of the driver seat side wiper blade 18 and the rotation angle of the second output shaft 12A (For example, a second output shaft rotation angle map described later) is stored in advance, and the rotation angle of the second output shaft 12A is controlled according to the rotation angle of the first output shaft 11A according to the map.

FIG. 10 shows an example of a second output shaft rotation angle map that defines the rotation angle of the second output shaft 12A in accordance with the rotation angle of the first output shaft 11A in the present embodiment. The horizontal axis in FIG. 10 is the first output shaft rotation angle θ _A that is the rotation angle of the first output shaft 11A, and the vertical axis is the second output shaft rotation angle θ _B that is the rotation angle of the second output shaft 12A. . The origin O in FIG. 10 shows a state in which the passenger seat side wiper blade 36 is at the lower inversion position P2P. In FIG. 10, θ ₁ indicates a state in which the passenger seat side wiper blade 36 is at the upper inversion position P1P as a result of the first output shaft 11A having rotated by the first predetermined rotation angle θ ₁ .

When the first absolute angle sensor 114 starts rotation of the first output shaft 11A of the first motor 11, the microcomputer 58 detects the rotation angle of the first output shaft 11A detected by the first absolute angle sensor 114 and the second output shaft. Check the rotation angle map. With this collation, the second output shaft rotation angle θ _B corresponding to the first output shaft rotation angle θ _A detected by the first absolute angle sensor 114 is calculated from the angle indicated by the curve 190 in FIG. so that the second output shaft rotation angle theta _B controls the rotation angle of the second output shaft 12A of the second motor 12.

More specifically, the microcomputer 58 determines that the first absolute angle sensor 114 starts to change the rotation angle of the first output shaft 11A of the first motor 11 from 0 ° in the positive rotation direction. It is determined that the blade 36 has started to move from the lower inversion position P2P, and the second output shaft 12A starts to rotate forward. As described above, the microcomputer 58 determines the rotation angle of the second output shaft 12A corresponding to the rotation angle of the first output shaft 11A using the second output shaft rotation angle map. 2 The rotation angle of the second output shaft 12A is monitored based on the signal from the absolute angle sensor 118, and the rotation of the second motor 12 is controlled so as to be the rotation angle determined using the second output shaft rotation angle map. . Depending on the setting of the second output shaft rotation angle map, as shown in FIG. 10, the first output shaft rotation angle θ _A becomes an intermediate rotation angle θ _m between 0 ° and the first predetermined rotation angle θ _1. when the rotation angle in the forward rotation of the second output shaft 12A is set to be a second predetermined rotational angle theta _2. When the rotation angle of the second output shaft 12A in the forward rotation becomes the second predetermined rotation angle θ ₂ , the fifth axis L5, which is the fulcrum of the passenger seat side wiper arm 35, is positioned above the passenger seat side on the windshield glass 1 ( To the second position).

After the rotation angle in the forward rotation of the second output shaft 12A reaches a second predetermined rotational angle theta _2, in accordance with the second output shaft rotation angle map, reduces the rotation angle of the second output shaft 12A. Specifically, the rotation angle of the first output shaft 11A reaches the first predetermined rotational angle theta _1, the second output shaft 12A second predetermined rotation until the passenger's side wiper blade 36 reaches the upper reversal position P1P By rotating backward at an angle θ ₂ , the rotation angle of the second output shaft 12A is reduced to 0 °. By the reverse rotation of the second output shaft 12A, the fifth axis L5 that is the fulcrum of the passenger seat side wiper arm 35 is returned to the original position (first position).

The above description is a case where the wiping range Z2 is wiped while the passenger seat side wiper blade 36 is moved from the lower inversion position P2P to the upper inversion position P1P. When the wiping range Z2 is wiped while the passenger-side wiper blade 36 is moved from the upper inversion position P1P to the lower inversion position P2P, the rotation angle of the first output shaft 11A is reversed from 0 ° by the first absolute angle sensor 114. When the change starts in the rotation direction, it is determined that the passenger-side wiper blade 36 has started to move from the upper reversal position P1P, and the second output shaft 12A of the second motor 12 starts to rotate forward. Note that the second output shaft rotation angle map shown in FIG. 10 is has a symmetrical curve 190 by an intermediate rotation angle theta _m to the shaft, but is not limited thereto. The curve of the map is set individually according to the shape of the windshield glass 1 and the like.

  Further, the microcomputer 58 changes the wiping speed of the wiper blade based on the position between the lower inversion position P2D and the upper inversion position P1D of the driver seat side wiper blade 18 and the degree of enlargement of the passenger seat side wiper arm 35. It is also possible to perform control such as Hereinafter, an example of wiping speed control when the second predetermined rotation angle, which is the rotation angle of the second output shaft 12A, is set large to increase the degree of expansion of the passenger seat side wiper arm 35 will be described. In such a case, the rotation speed of the first output shaft 11A is gradually reduced as the rotation angle of the first output shaft 11A of the first motor 11 approaches the intermediate rotation angle. When the rotation angle of the first output shaft 11A reaches the intermediate rotation angle, that is, when the passenger seat side wiper arm 35 is extended to the maximum, control is performed so that the rotation speed of the first output shaft 11A is minimized. To do. For example, a map (not shown) of the rotation speed of the first output shaft 11A defined according to the rotation angle of the first output shaft 11A is used for controlling the rotation speed of the first output shaft 11A. Further, the rotational speed of the second output shaft 12A is also controlled in accordance with the rotational speed of the first output shaft 11A. For example, if the second output shaft rotation angle map as shown in FIG. 10 is used, the rotation of the second output shaft 12A can be synchronized with the rotation of the first output shaft 11A. Corresponding to the increase / decrease in the rotation speed, the rotation speed of the second output shaft 12A can also be controlled. With this control, the speed at which the passenger-side wiper arm 35 is extended and the wiping speed of the passenger-side wiper blade 36 can be alleviated, and the possibility that the passenger feels uncomfortable that the passenger-side wiper arm 35 has suddenly extended can be reduced. .

  The washer motor drive circuit 57 includes a relay unit 84 incorporating 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 / excitation stop of the relay coil). When the relay coils are not excited, the relays RLY1 and RLY2 maintain the state in which the common terminals 84C1 and 84C2 are connected to the first terminals 84A1 and 84A2 (off state), respectively, and the relay coils are excited. The common terminals 84C1 and 84C2 are switched to the state of connecting to the second terminals 84B1 and 84B2, respectively. The common terminal 84C1 of the relay RLY1 is connected to one end of the washer motor 64, and the common terminal 84C2 of the relay RLY2 is connected to the other end of the washer motor 64. The first terminals 84A1 and 84A2 of the relays RLY1 and RLY2 are connected to the drain of the FET 86B, and the second terminals 84B1 and 84B2 of the relays RLY1 and RLY2 are connected to the power source (+ B).

  The gate of the FET 86B is connected to the FET drive circuit 80, and the source is grounded. The duty ratio related to the on / off of the FET 86B is controlled by the FET drive circuit 80. An FET 86A is provided between the drain of the FET 86B and the power source (+ B). The FET 86A is provided for the purpose of using a parasitic diode for absorbing a surge without switching on and off because no control signal is input to the gate.

  The relay drive circuit 78 and the FET drive circuit 80 control the drive of the washer motor 64 by switching on and off the two relays RLY1, RLY2 and the FET 86B. That is, when rotating the output shaft of the washer motor 64 in a predetermined direction (forward rotation), 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 with a predetermined duty ratio. Let With the above control, the rotation speed of the output shaft of the washer motor 64 is controlled.

  Hereinafter, control of the wiper system 100 according to the present embodiment will be described. FIG. 11 is a flowchart illustrating an example of an enlargement ratio control process for controlling the enlargement ratio of the passenger-side wiper arm 35 in accordance with the vehicle speed in the wiper system 100 according to the present embodiment. A series of procedures shown in FIG. 11 is processed by the microcomputer 58 in the control circuit 52.

  In step 100, the vehicle speed information calculated from the signal output from the vehicle speed sensor 92 is acquired. If the vehicle ECU 90 calculates the vehicle speed, the microcomputer 58 acquires vehicle speed information from the vehicle ECU 90.

  FIG. 12 is a graph showing an example of a correspondence relationship between the viewing angle 120 that is the range of the visual field of the driver and the vehicle speed (vehicle speed). The viewing angle 120 represents the range of the visual field in both human eyes in the left-right direction centered on the midline (the line that passes through the center of the front and back of the organism vertically straight from the top of the head). Yes, for a healthy person, it is approximately 120 °. However, as the vehicle speed increases, the driver's viewing angle 120 becomes narrower. As shown in FIG. 12, when the vehicle speed is 40 km / h, the driver's viewing angle 120 is approximately 100 °, but when the vehicle speed reaches 130 km / h, the viewing angle 120 becomes approximately 30 °.

  The expansion of the wiping range by the wiper device 2 is effective for securing the field of view on the front side of the passenger seat (securing a wide field of view on the passenger seat side), but the wiping range is expanded when the driver's field of view is reduced. However, the effect is not significant. The operation of expanding the wiping range in which the passenger-side wiper arm 35 is extended may cause a sense of incongruity to the passenger, particularly the passenger on the passenger seat side. It is desirable to suppress the expansion rate of the wiping range as compared with the low speed range.

In the present embodiment, as an example, the expansion ratio 122 of the wiping range is changed according to the vehicle speed as shown in FIG. Therefore, in step 102 of FIG. 11, the expansion ratio X of the wiping range indicated by a numerical value of 0 to 1.0 is calculated according to the current vehicle speed V _p by the following equation (1).

As an example, V _max and V _min in the formula (1) are constants. In this embodiment, V _max is 90 km / h or more, and V _min is 30 to 40 km / h. Substituting the current vehicle speed V _p that is a variable into the above equation (1), the enlargement ratio X corresponding to the vehicle speed is calculated.

  Alternatively, the enlargement ratio X corresponding to the vehicle speed may be calculated in advance as shown in FIG. 12 and stored in the memory 60 as a map of the enlargement ratio X with respect to the vehicle speed. In such a case, the microcomputer 58 determines an enlargement ratio X corresponding to the vehicle speed with reference to the map.

In step 104, the extension of the passenger side wiper arm 35 is controlled in accordance with the enlargement ratio X calculated in step 102, and the process returns. In step 104, the second output shaft 12A is rotated so that the second output shaft rotation angle θ _B is calculated by the enlargement ratio X, the second output shaft rotation angle map shown in FIG. 13, and the following equation (2). Control the angle.

Θ _A in the above equation (2) is the first output shaft rotation angle θ _A that is the rotation angle of the first output shaft 11A shown in FIGS. f (θ _A ) is the second output shaft determined in accordance with the first output shaft rotation angle θ _A when the enlargement ratio X is 1.0 (corresponding to 100%) shown by the curve 190 in FIG. The rotation angle is 12A. Further, g (θ _A ) is a second output shaft that is determined according to the first output shaft rotation angle θ _A when the enlargement ratio X is 0 (corresponding to 0%) shown by the curve 194 in FIG. The rotation angle is 12A.

When the enlargement ratio X is 0, that is, when the second motor 12 does not rotate, theoretically, the rotation angle g (θ _A ) of the second output shaft 12A is related to the value of the first output shaft rotation angle θ _A. It is always 0 °. However, in the present embodiment, the driving of the first motor 11 that reciprocates the driver-side wiper arm 17 and the passenger-side wiper arm 35 also to the link mechanism that moves the fifth axis L5 that is the fulcrum of the passenger-side wiper arm 35 is performed. The force may be affected, and g (θ _A ) may not always be 0 ° regardless of the value of the first output shaft rotation angle θ _{A in} practice.

However, if the change in g (θ _A ) with respect to the first output shaft rotation angle θ _A can be ignored, the second output shaft rotation angle θ _B at the enlargement ratio X is expressed by the following equation (3). , F (θ _A ) and X can be calculated.

A curve 192 in FIG. 13 represents the second output shaft rotation angle θ _B when the enlargement ratio X calculated based on the above equation (1) is 0.5 (equivalent to 50%). The second output shaft rotation angle θ _B indicated by the curve 192 is approximately ½ of the angle indicated by the curve 190 when the enlargement ratio X is equivalent to 100%.

  FIG. 14 shows an example of a change in the wiping range according to the enlargement ratio X. In FIG. 14, the wiping range Z1 shows the case where the enlargement ratio X is equivalent to 0%, the wiping range Z2 shows the case where the enlargement ratio X is equivalent to 100%, and the wiping range Z3 shows the case where the enlargement ratio X is equivalent to 50%. Yes. As shown in FIG. 14, by changing the enlargement ratio X in accordance with the vehicle speed, the degree of extension of the passenger-side wiper arm 35 is suppressed during high speed travel where the viewing angle of the driver is narrowed, and the wiper device is provided to the occupant. It is possible to avoid giving a sense of incongruity about the second operation.

  In the present embodiment, the degree of extension of the passenger side wiper arm 35 is controlled by paying attention to the change in the viewing angle of the driver with respect to the vehicle speed. The viewing angle of the driver depends not only on the vehicle speed but also on the surrounding brightness and weather.

  For example, as the brightness of the scene in front of the vehicle decreases, the viewing angle of the driver also decreases. In the present embodiment, the brightness (illuminance) of the scene in front of the vehicle may be calculated from the brightness of the image data ahead of the vehicle acquired by the in-vehicle camera 94, and the enlargement factor X may be calculated according to the calculated illuminance. .

As an example, the calculation of the enlargement factor X according to the brightness outside the vehicle is based on the following equation (4).

As an example, L _max and L _min in equation (4) are constants. In this embodiment, L _max is the illuminance of the scene in front of the vehicle in clear daytime, and L _min is at sunset in clear sky. It is the illuminance of the scene in front of the vehicle. By substituting the current illuminance L _p that is a variable into the above equation (4), the enlargement factor X corresponding to the illuminance L _p is calculated, and the second output shaft rotation angle θ _B is set according to the calculated enlargement factor X Control.

Alternatively, the enlargement ratio X may be calculated corresponding to the strength of rain legs. Since the wiper system 100 according to the present embodiment includes the rain sensor 76, the enlargement ratio X is calculated based on the degree of precipitation detected by the rain sensor 76. As an example, the calculation of the enlargement rate X according to the degree of precipitation is based on the following equation (5).

As an example, R _max and R _min in equation (4) are constants. In this embodiment, R _max is the degree of precipitation equivalent to heavy rain of about 20 to 30 mm in one hour rainfall, and R _min is It is the degree of precipitation equivalent to 1 to 3 mm of weak rain per hour. By substituting the degree of precipitation R _p detected by the rain sensor 76, which is a variable, into the above equation (4), the enlargement rate X corresponding to the rain leg is calculated, and the second output shaft rotation is performed according to the calculated enlargement rate X Control the angle θ _B.

  In the present embodiment, as described above, when any one of the influences of the vehicle speed, the brightness in front of the vehicle, or the weather exists, so-called OR control is performed to change the enlargement ratio X according to the influences. . However, in the case where the control of the enlargement ratio X is made strict, etc., so-called AND control that changes the enlargement ratio X when there are at least two influences due to the vehicle speed, the brightness in front of the vehicle, or the weather is performed. Good.

  The magnification factor X corresponding to the illuminance or rain leg may be calculated in advance and stored in the memory 60 as a map of the magnification factor X with respect to the illuminance or rain foot. In such a case, the microcomputer 58 refers to the map to determine the enlargement ratio X according to the illuminance or rain legs.

  As described above, according to the present embodiment, when the driver's viewing angle is affected by the vehicle speed, the brightness in front of the vehicle, or the weather, the magnification factor X is changed according to the influence. When the viewing angle of the driver is narrowed, the degree of extension of the passenger side wiper arm 35 can be suppressed so that the passenger does not feel uncomfortable about the operation of the wiper device 2.

  Subsequently, a modification of the present embodiment will be described. FIG. 15 is a flowchart showing a modification of the enlargement ratio control process for controlling the enlargement ratio of the passenger-side wiper arm 35 in accordance with the speed of the vehicle in the wiper system 100 according to the present embodiment. A series of procedures shown in FIG. 15 is processed by the microcomputer 58 in the control circuit 52.

  In the enlargement ratio control process shown in FIG. 11, the enlargement ratio X is continuously changed according to the change in the vehicle speed. However, in the modification shown in FIG. 15, the enlargement ratio X is stepwise according to the predetermined threshold speed. To change.

  In step 130 of FIG. 15, information on the vehicle speed calculated from the signal output from the vehicle speed sensor 92 is acquired. If the vehicle speed is calculated by the vehicle ECU 90, the microcomputer 58 acquires vehicle speed information from the vehicle ECU 90.

  In step 132, it is determined whether the vehicle speed is equal to or higher than a first threshold speed. As an example, the first threshold speed is 40 to 50 km / h corresponding to a speed limit on a general road. If the determination in step 132 is affirmative, the procedure proceeds to step 136. If the determination in step 132 is negative, the enlargement ratio X is set to, for example, 100% in step 134, and the procedure proceeds to step 142.

  In step 136, it is determined whether the vehicle speed is equal to or higher than a second threshold speed. As an example, the second threshold speed is 80 to 100 km / h corresponding to the speed limit on the highway. If the determination in step 136 is affirmative, the enlargement ratio X is set to, for example, 0% in step 140, and the procedure proceeds to step 142. If the determination in step 136 is negative, the enlargement factor X is set to, for example, 50% in step 138, and the procedure proceeds to step 142.

  In step 142, the extension of the passenger side wiper arm 35 is controlled as in step 104 of FIG. 11 according to the enlargement ratio X calculated in steps 134, 138, and 140, and the process returns.

  As described above, in the modification of the present embodiment, since the enlargement ratio X is changed stepwise according to the vehicle speed, the calculation processing load by the microcomputer 58 is greater than that shown in FIG. Can be reduced. Therefore, the performance of the microcomputer 58 does not need to be higher than that in the case where the enlargement ratio X is continuously changed according to the vehicle speed as shown in FIG. It can be configured at a lower cost than the case.

  In the present embodiment, the first output shaft 11A of the first motor 11 and the second output shaft 12A of the second motor 12 are controlled to be able to rotate forward and backward (reciprocating). However, the present embodiment is limited to this. There is no. For example, one of the first output shaft 11A and the second output shaft 12A may rotate in one direction.

  In the present embodiment, the rotation of the first output shaft 11A of the first motor 11 causes the driver-side wiper blade 18 and the passenger-side wiper blade 36 to move upside-down positions P1D and P1P and downside-inversion positions P2D and P2P. However, the present invention is not limited to this. For example, the first motor 11 includes a “driver's seat side first motor” and a “passenger's seat side first motor”, and the driver seat side wiper blade 18 is moved down to the upper inversion position P1D by the rotation of the driver seat side first motor. The structure may be such that the passenger seat side wiper blade 36 is moved between the upper inversion position P1P and the lower inversion position P2P by moving between the inversion position P2D and rotation of the first passenger seat side motor.

  In the present embodiment, the driver-side wiper blade 18 and the passenger-side wiper blade 36 are structured not to overlap in the vehicle width direction at the lower inversion positions P2D and P2P. However, the present invention is limited to this. There is no. For example, the driver seat side wiper blade 18 side of the passenger seat side wiper blade 36 may be set longer. In other words, the length of the passenger seat side wiper blade 36 is set so that the driver seat side wiper blade 18 side of the passenger seat side wiper blade 36 overlaps the passenger seat side wiper blade 36 side of the driver seat side wiper blade 18. Also good. Thereby, when wiping the wiping range Z2 during the reciprocating motion, it is possible to reduce the non-wiping area that remains on the lower center side of the windshield glass.

  In the present embodiment, the passenger seat-side wiper arm 35 (passenger seat-side wiper blade 36) is extended to the vicinity of the intermediate angle at the predetermined rotation angle of the first output shaft 11A, and from the vicinity of the intermediate angle to the predetermined rotation angle. The passenger seat side wiper arm 35 (passenger seat side wiper blade 36) is controlled to be reduced, but the present invention is not limited to this. For example, when the passenger seat side wiper blade 36 wipes from the lower inversion position P2P toward the upper inversion position P1P (during forward wiping), the passenger seat side wiper arm 35 may be controlled to gradually extend.

  In the present embodiment, the embodiment using the rotation angle of the first output shaft 11A of the first motor 11 and the rotation angle of the second output shaft 12A of the second motor 12 has been described. The rotational position of the first output shaft 11A and the rotational position of the second output shaft 12A may be used.

DESCRIPTION OF SYMBOLS 1 ... Wind shield glass (wind shield), 1A ... Light-shielding part, 2 ... Wiper apparatus, 3 ... Center frame, 3A ... Support part, 4 ... Pipe frame, 5 ... Pipe frame, 6 ... 1st holder member, 6A ... Fixed 7, second holder member, 7 A, fixed portion, 7 B, cylindrical portion, 11, first motor, 11 A, first output shaft, 12, second motor, 12 A, second output shaft, 13, first. Drive crank arm, 14 ... second drive crank arm, 15 ... driver seat side pivot shaft, 16 ... driver seat side swing lever, 17 ... driver seat side wiper arm, 18 ... driver seat side wiper blade, 19 ... first connecting rod , 21 ... first passenger seat side pivot shaft, 22 ... second passenger seat side pivot shaft, 23, 24 ... bearing, 25 ... first passenger seat side swing lever, 26 ... first drive lever, 27 ... second connection Rod, 28 ... second assistant Side swing lever, 29 ... second drive lever, 31 ... third connecting rod, 32 ... first driven lever, 33 ... arm head, 34 ... retainer, 35 ... passenger side wiper arm, 36 ... passenger side wiper blade, DESCRIPTION OF SYMBOLS 50 ... Wiper switch, 52 ... Control circuit, 54 ... Direction indicator switch, 56 ... Drive circuit, 57 ... Washer motor drive circuit, 58 ... Microcomputer, 60 ... Memory, 62 ... Washer switch, 64 ... Washer motor, 66 ... Washer pump, 68 ... Washer liquid tank, 70 ... Washer device, 72A ... Driver seat side hose, 72B ... Passenger seat side hose, 74A ... Driver seat side nozzle, 74B ... Passenger seat side nozzle, 76 ... Rain sensor, 78 ... Relay Drive circuit, 80 ... FET drive circuit, 84 ... relay unit, 84A1, 84A2 ... first terminal, 8 B1, 84B2 ... second terminal, 84C1, 84C2 ... common terminal, 90 ... vehicle ECU, 92 ... vehicle speed sensor, 94 ... in-vehicle camera, 96 ... GPS device, 98 ... steering angle sensor, 100 ... wiper system, 104 ... first Predriver 106 106 Second predriver 108 First motor drive circuit 110 Second motor drive circuit 112 Output shaft end 112A Sensor magnet 114 First absolute angle sensor 116 Output shaft End part, 116A ... sensor magnet, 118 ... second absolute angle sensor, 120 ... viewing angle, 122 ... magnification, 150P ... passenger side wiper arm, 154P ... passenger side wiper blade, 158 ... non-wiping range, 160 ... 4 Node link mechanism, 190, 192, 194 ... Curve, RLY1, RLY2 ... Relay, CC1, CC2, CC3, CW1, CW2 ... Direction of rotation CW3: Operating direction, H1: Wiping range, K: Waterproof cover, L1: First axis, L2: Second axis, L3: Third axis, L4: Fourth axis, L: Same straight line, L5: Fifth axis, P1D, P1P ... Upper reverse position, P2D, P2P ... Lower reverse position, P3P ... Upper reverse position, P4P ... Lower reverse position, Z1, Z2, Z3, Z10, Z12 ... Wipe range, [theta] ₁ ... First predetermined rotation angle θ ₂ ... second predetermined rotation angle, θ _m ... intermediate rotation angle, θ _A ... first output shaft rotation angle, θ _B ... second output shaft rotation angle

Claims (14)

The wiper arm having a first output shaft reciprocally rotates around the fulcrum of the wiper arm by rotation of the first output shaft, and the wiper blade connected to the tip of the wiper arm is reversed upside down and downside of the windshield. A first motor that performs a reciprocating wiping operation with respect to a position;
A second motor having a second output shaft, wherein the wiping range of the windshield by the wiper blade is variable by rotation of the second output shaft;
The rotation angle of the second output shaft is determined in accordance with the enlargement ratio of the wiper arm based on the change in the viewing angle of the driver, and is synchronized with the reciprocating wiping operation of the wiper blade by the rotation of the first motor. A control unit that performs control to rotate the second output shaft of the two motors at the determined rotation angle;
Wiper device with extended wiping range. A rotation angle detector for detecting a rotation angle of the first output shaft;
The second motor rotates the second output shaft at the determined rotation angle to move the fulcrum of the wiper arm from the first position and the first position according to the determined rotation angle. Move between the second position away from the upper side,
The control unit is configured to move the fulcrum of the wiper arm between the first position and the second position according to the rotation angle of the first output shaft detected by the rotation angle detection unit. The wiper range expansion wiper device according to claim 1 which controls a 2nd motor.   The control unit is configured such that the rotation angle of the first output shaft detected by the rotation angle detection unit becomes an angle corresponding to one of the upper inversion position and the lower inversion position, and then the upper inversion position and the lower inversion position. Wiping to move the fulcrum of the wiper arm from the first position to the second position by rotating the second output shaft at the determined rotation angle until an angle corresponding to an intermediate position with respect to the reverse position is reached. In addition to performing range expansion control, the rotation angle of the first output shaft detected by the rotation angle detector becomes an angle corresponding to an intermediate position between the upper rotation position and the lower rotation position, and then the upper rotation The second output shaft is rotated at the determined rotation angle until the angle corresponding to the other of the position and the lower reverse position is reached, and the fulcrum of the wiper arm is moved from the second position to the first position. Convergence system to move Wiping range expansion wiper system according to claim 2 for.   The control unit is configured to control a second output shaft according to the enlargement ratio based on a rotation angle control map that defines a rotation angle of the second output shaft with respect to a rotation angle of the first output shaft and the determined enlargement ratio. The wiping range expansion wiper device according to claim 1, wherein the rotation angle is determined.   The wiping range expansion wiper device according to any one of claims 1 to 4, wherein the control unit decreases the expansion rate as the detected vehicle speed increases.   The wiping range expansion wiper device according to any one of claims 1 to 5, wherein the control unit decreases the expansion rate as the brightness in front of the vehicle decreases.   The wiping range expansion wiper device according to any one of claims 1 to 6, wherein the control unit decreases the expansion rate as precipitation increases. The first output shaft has a first output shaft, and the rotation of the first output shaft causes the wiper arm to reciprocate around the fulcrum of the wiper arm, and the wiper blade connected to the tip of the wiper arm is turned upside down and down. Starting rotation of the first output shaft of the first motor that performs a reciprocating wiping operation with respect to the position;
The rotation angle of the second output shaft of the second motor is determined according to the enlargement ratio of the wiper arm based on the change in the viewing angle of the driver, and is synchronized with the reciprocating wiping operation of the wiper blade by the rotation of the first motor. An expansion / contraction step for varying the wiping range of the wiper blade by rotating the second output shaft of the second motor at the determined rotation angle;
Control method of wiper device for expanding wiping range including A step of detecting a rotation angle of the first output shaft by a rotation angle detector;
The expansion / contraction step includes rotating the second output shaft of the second motor at the determined rotation angle in accordance with the rotation angle of the first output shaft detected by the rotation angle detection unit. The wiping range of the wiper blade is varied by moving the fulcrum between a first position and a second position away from the first position in accordance with the determined rotation angle. The control method of the wiping range expansion wiper apparatus of Claim 8. The expansion / contraction step includes an enlargement rate determination step for determining an enlargement rate of the wiper arm in accordance with a situation in which a driver's viewing angle change information is provided.
A second output shaft rotation angle determination step for determining a rotation angle of the second output shaft according to the expansion rate determined in the expansion rate determination step;
The rotation angle of the first output shaft detected by the rotation angle detection unit becomes an angle corresponding to one of the upper inversion position and the lower inversion position, and is intermediate between the upper inversion position and the lower inversion position. The second output shaft is rotated at the rotation angle determined in the second output shaft rotation angle determination step until the angle corresponding to the position is reached, and the fulcrum of the wiper arm is moved from the first position to the second position. A wiping range expansion step for controlling the second motor to move to a position;
After the rotation angle of the first output shaft detected by the rotation angle detection unit reaches an angle corresponding to an intermediate position between the upper inversion position and the lower inversion position, the upper inversion position and the lower inversion position The second output shaft is rotated at the rotation angle determined in the second output shaft rotation angle determination step until the angle corresponding to the other angle is reached, and the fulcrum of the wiper arm is moved from the second position to the second position. A convergence step for controlling the second motor to move to one position;
The control method of the wiping range expansion wiper apparatus of Claim 9 which has these.   The second output shaft rotation angle determination step includes a rotation angle control map that defines a change in the rotation angle of the second output shaft relative to the rotation angle of the first output shaft, and an expansion rate determined in the expansion rate determination step. The control method of the wiping range expansion wiper device according to claim 10, wherein the rotation angle of the second output shaft is determined based on the expansion ratio.   The control method of the wiping range expansion wiper device according to any one of claims 8 to 11, wherein the expansion / contraction step decreases the expansion rate as the detected vehicle speed increases.   The control method of the wiping range expansion wiper device according to any one of claims 8 to 12, wherein the expansion / contraction step decreases the expansion ratio as the brightness in front of the vehicle decreases.   The method for controlling a wiping range expanding wiper device according to any one of claims 8 to 13, wherein the expansion / contraction step decreases the expansion rate as precipitation increases.