JP6113543B2 - Wiper device - Google Patents

Description

  The present invention relates to a wiper device for wiping a windshield of a vehicle.

  Conventionally, a wiper device for wiping a windshield of a vehicle is known, and an example of the wiper device is described in Patent Document 1.

  The wiper device described in Patent Document 1 includes a pivot shaft provided on a cowl top panel of a vehicle, and a drive arm that operates around the pivot shaft. The drive arm is provided with a pin at a position eccentric from the pivot shaft, and the center of the planetary gear is rotatably attached to the pin. A cover is provided so as to surround the pivot shaft, and an internal gear is formed on the cover. The cover can be rotated relative to the pivot axis.

  The planetary gear is meshed with the internal gear. A protrusion is provided at a position eccentric from the center of the planetary gear, and a support arm is rotatably connected to the protrusion. The cover is provided with a guide rail, and the support arm is operable along the guide rail. A wiper arm is fixed to the end of the support arm opposite to the end connected to the protrusion, and a wiper blade is attached to the tip of the wiper arm. The wiper blade is in contact with the windshield of the vehicle.

  In the wiper device described in Patent Document 1, when the pivot shaft rotates forward and backward within a range of a predetermined angle, the planetary gear rotates along the internal gear and revolves around the pivot shaft. As the planetary gear revolves around the pivot shaft, the support arm and the wiper arm reciprocate in the radial direction around the pivot shaft. Further, the cover swings within a predetermined angle range about the pivot shaft by the rotation and revolution of the planetary gear.

  For this reason, the wiper arm reciprocates within a range of a predetermined angle together with the cover, and reciprocates in the longitudinal direction. Therefore, the windshield is wiped by the wiper blade, and the wiper blade reciprocates in the longitudinal direction as the operating angle of the wiper arm changes, so that the range wiped by the wiper blade is in the radial direction of the pivot shaft. To change. In this way, Patent Document 1 describes that the wiping area of the windshield by the wiper device can be increased as much as possible.

  Note that a wiper device that reduces wiping residue of the windshield is also described in Patent Document 2. In the wiper device described in Patent Document 2, a wiper arm and a wiper blade are both attached to a main arm that reciprocates with the power of a pivot shaft so as to be movable in the longitudinal direction.

Japanese Utility Model Publication No. 6-61619 JP 2003-54378 A

  However, in the wiper devices described in Patent Documents 1 and 2, both the wiper arm and the wiper blade reciprocate in the longitudinal direction. For this reason, there was a problem that the power required to expand the wiping area of the windshield increased.

  The objective of this invention is providing the wiper apparatus which can suppress that the motive power required in order to expand the wiping area of a windshield increases.

The present invention includes a wiper arm that is supported by a pivot shaft and operates around the pivot shaft, and a wiper blade that is attached to the wiper arm and wipes a windshield of a vehicle when the wiper arm operates. An operation mechanism is provided for operating the wiper blade with respect to the wiper arm in a radial direction about the pivot axis, and the operation mechanism operates the wiper blade with respect to the wiper arm by a magnetic force. The operating mechanism includes a permanent magnet provided on the wiper blade, and an electromagnet provided on the wiper arm and generating a magnetic force to operate the wiper blade together with the permanent magnet .

In the length direction of the wiper arm, a support portion that supports the wiper blade is provided at an end portion opposite to an end portion connected to the pivot shaft, and the wiper arm, the pivot shaft, the support portion is cable housing the electric wire for supplying current to the electromagnet is accommodated that provided.

In the present invention, the wiper blade includes a holder and a blade rubber, and a guide mechanism is provided that enables the holder to operate with respect to the support portion .

In the present invention, the guide mechanism has a convex portion provided on the support portion and a concave portion provided on the holder, and the holder is slidable along the convex portion .

  In the present invention, the wiper arm is provided with an auxiliary blade for wiping the windshield inside a range in which the wiper blade wipes the windshield in a radial direction about the pivot shaft.

  In the present invention, the operation mechanism detects an operation angle of the wiper arm with respect to a stop position of the wiper arm, and based on the detected operation angle of the wiper arm, a radial direction about the pivot axis The position of the wiper blade at is determined.

  The present invention is provided with an electric motor that rotates the pivot shaft, and a sensor that detects a rotation state of the output shaft of the electric motor and outputs a detection signal, and the operation mechanism detects the sensor. The operating angle of the wiper arm is detected from the signal.

  The wiper device of the present invention can move the wiper blade in the radial direction about the pivot axis with respect to the wiper arm. Therefore, the wiping range of the wiper blade moves in the radial direction around the pivot axis, and the wiping residue of the windshield can be reduced. Moreover, since the wiper blade is operated with respect to the wiper arm, it is possible to suppress an increase in power necessary for moving the wiper blade wiping range.

  The wiper device of the present invention can operate the wiper blade together with the permanent magnet by the magnetic force generated by the electromagnet.

  The wiper device of the present invention can wipe the inside of the wiper blade wiping range by the auxiliary blade in the radial direction around the pivot axis. Therefore, the remaining wiping can be further reduced.

  The wiper device of the present invention can operate the wiper blade in accordance with the shape of the windshield, and can reduce the remaining wiping.

1 is a schematic plan view of a vehicle having a wiper device of the present invention. It is a block diagram which shows the control system of the wiper apparatus of this invention. It is typical sectional drawing which shows the principal part of the wiper apparatus of this invention. It is typical sectional drawing which shows the principal part of the wiper apparatus of this invention. It is a figure which shows typically the wiping range of the wiper apparatus of this invention. It is.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. A vehicle 10 shown in FIG. 1 has a windshield 11 as a windshield. The windshield 11 has a substantially trapezoidal shape when the vehicle 10 is viewed in plan. That is, in the windshield 11, the length of the upper edge 11a is shorter than the length of the lower edge 11b. The upper edge 11 a is a place near the roof 12 among the edges of the windshield 11, and the lower edge 11 b is a place near the cowl top panel 13 among the edges of the windshield 11. Further, the two side edges 11c that connect both ends of the upper edge 11a and both ends of the lower edge 11b have the same length.

  A wiper device 14 for wiping the windshield 11 is provided. The wiper device 14 includes an electric motor 15, a pivot shaft 16 as a pivot shaft, a wiper arm 17, and a wiper blade 18. The electric motor 15 is accommodated in the casing 19, and the casing 19 is provided below the cowl top panel 13. The electric motor 15 has an armature shaft 15a as an output shaft, and the armature shaft 15a rotates forward and backward within a range of a predetermined angle. A deceleration mechanism 20 is provided inside the casing 19.

  The speed reduction mechanism 20 includes a worm formed on the outer periphery of the armature shaft 15a and a worm wheel 21 that meshes with the worm. The pivot shaft 16 is provided coaxially with the worm wheel 21 and so as to rotate integrally. When the torque of the armature shaft 15a is transmitted to the pivot shaft 16, the speed reduction mechanism 20 is a mechanism that amplifies the torque by reducing the rotational speed of the pivot shaft 16 relative to the rotational speed of the armature shaft 15a.

  The torque of the amateur shaft 15a is transmitted to the pivot shaft 16 via the speed reduction mechanism 20, and the pivot shaft 16 rotates forward and backward within a predetermined angle range. Only one pivot shaft 16 is disposed at the approximate center in the width direction of the vehicle 10 and in front of the windshield 11. A sensor 22 that detects the rotation angle of the armature shaft 15a is provided inside the casing 19. The sensor 22 outputs a detection signal.

  The wiper arm 17 is formed into a rod shape using a metal material, a resin material, or the like, and one end of the wiper arm 17 in the length direction is fixed to the pivot shaft 16. The wiper arm 17 reciprocates within a predetermined angle range when the pivot shaft 16 rotates forward and backward. The wiper arm 17 reciprocates around the pivot shaft 16 with a circular arc within a predetermined angle range. The wiper arm 17 has a structure that does not move in the radial direction of the arc centered on the pivot shaft 16.

  A support portion 23 is provided at the end of the wiper arm 17 opposite to the end connected to the pivot shaft 16 in the length direction. The support portion 23 is an element that supports the wiper blade 18 and protrudes from the wiper arm 17 toward the windshield 11. The support portion 23 is formed of a nonmagnetic material, for example, resin, and the support portion 23 is fixed to the wiper arm 17.

  The wiper blade 18 has a holder 24 and a blade rubber 25 as shown in FIG. The holder 24 is formed in a long shape from a non-magnetic material, for example, resin, and the holder 24 is operatively attached to the support portion 23. The holder 24 is attached to the support portion 23 so that the longitudinal direction of the holder 24 and the longitudinal direction of the wiper arm 17 coincide with each other. The length of the holder 24 in the operation direction is set longer than the length of the support portion 23.

  A guide mechanism 26 that allows the holder 24 to operate with respect to the support portion 23 is provided. The guide mechanism 26 includes a convex portion 27 provided on the support portion 23 and a concave portion 28 provided on the holder 24. Two protrusions 27 are provided corresponding to both sides in the width direction of the wiper arm 17. The two convex portions 27 are provided in a rail shape along the longitudinal direction of the wiper arm 17. The two convex portions 27 protrude in opposite directions along the width direction of the wiper arm 17.

  The recess 28 provided in the holder 24 is provided along the longitudinal direction of the holder 24. Two recesses 28 are provided at both ends in the width direction of the holder 24, and the two recesses 28 have a depth in the width direction of the holder 24. The two convex portions 27 are individually inserted into the two concave portions 28, and the holder 24 can move in the longitudinal direction along the two convex portions 27, that is, can slide.

  Further, in the longitudinal direction of the wiper arm 17, the lengths of the two convex portions 27 and the lengths of the two concave portions 28 are set based on the planar shape of the windshield 11 to be wiped by the wiper device 14. A stopper is provided on at least one of the support portion 23 and the holder 24. The stopper is a structure that determines a range in which the holder 24 moves along the support portion 23.

  Further, the blade rubber 25 is integrally formed of a rubber material, for example, a non-diene rubber such as ethylene-propylene-diene terpolymer rubber (EPDM) or ethylene-propylene copolymer rubber (EPR). The blade rubber 25 includes a base portion 25a fixed to the holder 24 and a lip portion 25b continuous to the base portion 25a, and the lip portion 25b contacts the surface of the windshield 11. The blade rubber 25 is curved along the longitudinal direction so that the tip of the lip portion 25b is in close contact with the surface of the windshield 11.

  Further, the wiper device 14 includes an operation mechanism 29 that operates the wiper blade 18 with respect to the wiper arm 17. More specifically, the operation mechanism 29 is a mechanism that operates the wiper blade 18 in the radial direction of a circle centered on the pivot shaft 16. The operation mechanism 29 includes two electromagnets 30a and 30b, a plurality of permanent magnets 31a to 31h, and a guide mechanism 26. The two electromagnets 30 a and 30 b are arranged on the support portion 23 at a predetermined interval along the longitudinal direction of the wiper arm 17. That is, a part of the support portion 23 is interposed between the electromagnets 30 a and 30 b in the longitudinal direction of the wiper arm 17.

  The two electromagnets 30a and 30b are separately configured by winding a coil around a magnetic body. The coil is connected to the power source 33 via the switch circuit 32. Specifically, an electric wire through which an electric current flows is provided. The switch circuit 32 performs control for switching the direction of current flowing from the power source 33 to the coil, and control for cutting off the electric circuit including the power source 33 and the coil. The power source 33 is provided on the vehicle body side, and the power source 33 includes a battery and a capacitor. The power source 33 may be the same as or different from the power source that supplies power to the electric motor 15. The two electromagnets 30a and 30b generate magnetic force when supplied with current, and do not generate magnetic force when current is not supplied from the power source 33 to the coil. In addition, when the direction of the current flowing from the power source 33 to the coil is switched, the polarities, that is, the N pole and the S pole are switched separately between the two electromagnets 30a and 30b.

  On the other hand, the plurality of permanent magnets 31 a to 31 h are attached to the wiper blade 18, specifically, the holder 24. The plurality of permanent magnets 31 a to 31 h are arranged in the longitudinal direction of the holder 24. Further, the plurality of permanent magnets 31a to 31h are alternately arranged with different polarities. In the example of FIG. 3, the permanent magnets 31a, 31c, 31e, and 31g are south poles, and the permanent magnets 31b, 31d, 31f, and 31h are north poles. Further, the wiper arm 17, the support portion 23, the pivot shaft 16 and the like are provided with a cable housing portion for routing an electric wire, such as a hole, a groove, and a notch.

  This structure suppresses the electric wire from being worn or damaged even when the wiper arm 17 operates around the pivot shaft 16. In addition, you may accommodate an electric wire (cable) by performing insert molding to the wiper arm 17. FIG. A film-shaped cable may be bonded to the wiper arm 17.

  Further, as shown in FIG. 2, an electric motor control device 34 that controls stop and rotation, rotation speed, rotation direction, and the like of the electric motor 15 is provided. The electric motor controller 34 receives a wiper switch signal operated by the driver. In addition, an electromagnet control device 35 that moves the wiper blade 18 in the longitudinal direction of the wiper arm 17 is provided. The electromagnet controller 35 controls the position and operating range of the wiper blade 18 in the radial direction about the pivot shaft 16. The operation mechanism 29 includes an electromagnet control device 35. Signals are exchanged between the electric motor control device 34 and the electromagnet control device 35.

  Furthermore, an auxiliary blade 36 is provided between the support portion 23 and the pivot shaft 16 in the radial direction around the pivot shaft 16. The auxiliary blade 36 has a blade rubber that contacts the windshield 11. The auxiliary blade 36 has a wiping range in the radial direction around the pivot shaft 16 on the inner side of the wiper blade 18. Further, a cover 37 is provided above the cowl top panel 13. The cover 37 is a plate-like element provided in the width direction of the vehicle 10, and the end portion of the pivot shaft 16 to which the wiper arm 17 is attached is disposed between the cover 37 and the cowl top panel 13.

  The wiper device 14 of this embodiment does not supply power to the electric motor 15 when the wiper switch is turned off. For this reason, the wiper arm 17 is stopped at a position where the wiper blade 18 is in contact with the cowl top panel 13 or the windshield 11, that is, at an initial position. This initial position corresponds to the stop position of the present invention. On the other hand, when the wiper switch is turned on, the wiper device 14 is supplied with electric power to the electric motor 15, and the armature shaft 15a rotates forward and backward within a predetermined angle range.

  When the torque of the amateur shaft 15a is transmitted to the pivot shaft 16 via the speed reduction mechanism 20, the wiper arm 17 operates in a direction away from the initial position, temporarily stops at the reverse position, and then approaches the initial position. The reciprocating operation of operating is repeated. That is, the wiper arm 17 swings within a predetermined angle range about the pivot shaft 16. When the wiper arm 17 is operated, the surface of the windshield 11 is wiped by the wiper blade 18, and foreign matters such as water droplets, snow, and dust on the surface of the windshield 11 are wiped off. The wiper blade 18 operates in an arc shape around the pivot shaft 16. Since the wiper blade 18 has a certain length around the pivot shaft 16, the windshield 11 is wiped with a width corresponding to the length.

  The wiper device 14 of this embodiment can move the wiper blade 18 in the longitudinal direction with respect to the wiper arm 17 based on the operation angle of the wiper arm 17 with respect to the initial position. For example, in FIG. 3A, an electric current is passed through the electromagnet 30a, the electromagnet 30a becomes an N pole, and a magnetic force is generated by the electromagnet 30a. The electromagnet 30a is located closer to the pivot shaft 16 than the electromagnet 30b in the longitudinal direction of the wiper arm 17. No current flows through the electromagnet 30b, and the electromagnet 30b does not generate a magnetic force. Therefore, the S-pole permanent magnet 31 c is attracted by the magnetic force generated by the N-pole electromagnet 30 a, and the wiper blade 18 is stopped with respect to the wiper arm 17.

  Here, as shown in FIG. 3B, the electromagnet control device 35 stops energization of the electromagnet 30a, energizes the electromagnet 30b, and controls the electromagnet 30b as the S pole. Then, the S-pole electromagnet 30b repels the S-pole permanent magnet 31e fixed to the wiper blade 18, and the S-pole electromagnet 30b is connected to the N-pole permanent magnet 31f arranged next to the permanent magnet 31e. Adsorb each other. As a result, the wiper blade 18 operates toward the left side as shown in FIG.

  Further, the electromagnet control device 35 stops energization of the electromagnet 30b and energizes the electromagnet 30a as shown in FIG. 3D when the wiper blade is in the position of FIG. 3C. Control is performed with 30a as the south pole. Then, the S-pole electromagnet 30a repels the S-pole permanent magnet 31c, and the electromagnet 30a is attracted to the N-pole permanent magnet 31d arranged on the right side of the permanent magnet 31c. As a result, the wiper blade 18 operates toward the left side as shown in FIG. As described above, when the wiper blade 18 is moved toward the left side in FIG. 3, the wiping range of the windshield 11 by the wiper blade 18 approaches the pivot shaft 16 along the longitudinal direction of the wiper arm 17.

  On the other hand, when the wiper blade 18 is in the position shown in FIG. 3E, when the energization to the electromagnet 30a is stopped and the electromagnet 30b is energized to make the electromagnet 30b the S pole, the S pole electromagnet 30b. And S permanent magnet 31g repel each other. Further, the N-pole permanent magnet 31 f disposed on the left side of the permanent magnet 31 g and the electromagnet 30 b are attracted to each other. As a result, the wiper blade 18 moves rightward with respect to the wiper arm 17, and the wiper blade 18 moves away from the pivot shaft 16 in the longitudinal direction of the wiper arm 17. Thereafter, the wiper blade 18 can be further moved away from the pivot shaft 16 by switching the electromagnets 30a, 30b and the polarity of the electromagnets 30a, 30b.

  As described above, when the wiper blade 18 is moved toward the right side in FIG. 3, the wiping range of the windshield 11 by the wiper blade 18 moves away from the pivot shaft 16 along the longitudinal direction of the wiper arm 17. The wiping width of the wiper blade 18 around the pivot shaft 16 is determined when the wiper blade 18 is stopped with respect to the wiper arm 17 and when the wiper blade 18 is moving in the longitudinal direction with respect to the wiper arm 17. It is the same in any case.

  Meanwhile, the electric motor control device 34 can indirectly detect the operation state of the wiper arm 17 based on the rotation state of the armature shaft 15 a detected by the sensor 22. The rotation state of the amateur shaft 15 a means a rotation angle based on the rotation direction of the amateur shaft 15 a and the position of the amateur shaft 15 a corresponding to the initial position of the wiper arm 17.

  The operation state of the wiper arm 17 means the operation direction of the wiper arm 17 and the operation angle of the wiper arm 17 with respect to the initial position of the wiper arm 17. The operation direction of the wiper arm 17 includes a direction in which the wiper arm 17 operates in a direction away from the initial position, and a direction in which the wiper arm 17 operates in a direction approaching the initial position. In the radial direction about the pivot shaft 16, the distance from the tip of the wiper blade 18 to the upper edge 11 a and the side edge 11 c of the windshield 11 depends on conditions such as the planar shape of the windshield 11 and the operating angle of the wiper arm 17. It is determined uniquely based on this.

  Therefore, when the wiper blade 18 is moved in the longitudinal direction of the wiper arm 17 in accordance with the movement direction and movement angle of the wiper arm 17, the outer end of the wiper blade 18 and the windshield in the radial direction about the pivot shaft 16. 11, the distance between the upper edge 11a and the side edge 11c can be made as short as possible. That is, the wiping range of the windshield 11 by the wiper blade 18 can be arbitrarily changed according to the planar shape of the windshield 11, and the remaining wiping can be reduced.

  An example of the wiping range of the wiper blade 18 by the wiper device 14 of this embodiment is shown in FIG. When the wiper blade 18 is operated with respect to the wiper arm 17, the wiping range of the wiper blade 18 can be changed between the wiping range A1 indicated by the alternate long and short dash line and the wiping range B1 indicated by the broken line. The wiping range A1 of the wiper blade 18 is located outside the wiping range B1 of the wiper blade 18 in the radial direction of the pivot shaft 16.

  Thus, the wiper device 14 can move the wiper blade 18 in the radial direction about the pivot shaft 16 with respect to the wiper arm 17. Therefore, the wiping range of the wiper blade 18 moves in the radial direction around the pivot shaft 16, and the remaining wiping of the windshield 11 can be reduced. Further, the wiper blade 18 is moved with respect to the wiper arm 17, and the wiper arm 17 does not move in the radial direction around the pivot shaft 16. Therefore, it is possible to suppress an increase in power necessary for moving the wiping range of the wiper blade 18.

  Further, the auxiliary blade 36 wipes an area that cannot be wiped by the wiper blade 18 when the wiper arm 17 is operated. As shown in FIG. 5, the wiping range C <b> 1 of the auxiliary blade 36 is a part of the wiping range A <b> 1 of the wiper blade 18 when the wiper blade 18 moves to the maximum outside in the radial direction around the pivot shaft 16. Overlap. As described above, the auxiliary blade 36 wipes an area that cannot be wiped by the wiper blade 18. The auxiliary blade 36 may not be provided.

  Furthermore, when the wiper switch is turned off, the electric motor control device 34 stops the armature shaft 15a in a state where the wiper arm 17 and the wiper blade 18 are both housed between the cowl top panel 13 and the cover 37. Can be controlled. The retracted position where the wiper arm 17 is accommodated between the cowl top panel 13 and the cover 37 is different from the initial position of the wiper arm 17. When the electric motor control device 34 performs this control, the wiper arm 17 and the wiper blade 18 are not visible to a person existing in front of the vehicle 10. Therefore, the design of the vehicle 10 is not impaired.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the wiper device of the present embodiment, the sensor that indirectly detects the operating angle of the wiper arm includes the sensor that detects the rotational position of the armature shaft, the sensor that detects the rotational position of the pivot shaft, and the operating angle of the wiper arm. Includes sensors that detect directly. Furthermore, the guide mechanism that enables the wiper blade of the present invention to move in the longitudinal direction with respect to the wiper arm includes a convex portion provided on the wiper blade, a support portion, and a concave portion into which the convex portion is fitted. The convex portion is provided in a rail shape along the longitudinal direction of the wiper blade. The concave portion is provided in the longitudinal direction of the wiper arm in the support portion.

  The wiper device of this embodiment includes a structure in which the support portion protrudes in the width direction of the wiper arm. Further, the wiper device of the present embodiment includes a structure in which the support portion is provided at the end portion in the longitudinal direction of the wiper arm. Further, in the wiper device of the present embodiment, the wiper arm and the support part are integrated using a structure in which the wiper arm and the support part are integrated by insert molding, a structure in which the wiper arm is integrated by an adhesive, a fastening element such as a screw or a bolt. Including structures.

  Furthermore, the wiper device of the present invention includes a first structure in which the electromagnet is provided on the wiper arm and the permanent magnet is provided on the wiper blade. The wiper device of the present invention includes a second structure in which the electromagnet is provided on the wiper blade and the permanent magnet is provided on the wiper arm. In the wiper device having the second structure, the first terminal connected to the power source is provided in the wiper arm, and the second terminal connected to the electromagnet is provided in the wiper blade. The wiper device having the second structure includes the first terminal and the second terminal both in a state where the wiper blade is operating with respect to the wiper arm and in a state where the wiper blade is stopped with respect to the wiper arm. Are connected to each other so as to be energized.

  The wiper device having the second structure separately controls energization and non-energization with respect to the plurality of electromagnets provided on the wiper blade, and each of the electromagnets generates a magnetic force and does not generate a magnetic force individually. Can be switched. Moreover, the wiper apparatus which has a 2nd structure can switch the polarity of an electromagnet to N pole and S pole by switching the direction of the electric current sent through the coil of each electromagnet. In the wiper device having the second structure, the principle that the wiper blade operates in the longitudinal direction of the wiper arm is the same as that of the wiper device having the first structure.

  Furthermore, the wiper device of the present invention can arbitrarily change the number of electromagnets and the number of permanent magnets. Furthermore, the wiper device of the present invention includes a structure in which the electromagnet and the permanent magnet are arranged in contact with each other, or a structure in which the electromagnet and the permanent magnet are arranged in a non-contact manner. That is, the wiper device of the present invention only needs to be able to operate the wiper blade by the magnetic force generated by the electromagnet acting on the permanent magnet. Furthermore, the windshield for wiping the wiper device of the present invention includes a windshield and a rear glass of the vehicle.

DESCRIPTION OF SYMBOLS 10 Vehicle 11 Windshield 11a Upper edge 11b Lower edge 11c Side edge 12 Roof 13 Cowl top panel 14 Wiper device 15 Electric motor 15a Amateur shaft 16 Pivot shaft 17 Wiper arm 18 Wiper blade 19 Casing 20 Reduction mechanism 21 Warm wheel 22 Sensor 23 Support part 24 holder 25 blade rubber 25a base 25b lip part 26 guide mechanism 27 convex part 28 concave part 29 operating mechanism 30a, 30b electromagnet 31a, 31b, 31c, 31d, 31e, 31f, 31g, 31h permanent magnet 32 switch circuit 33 power supply 34 electric motor Control device 35 Electromagnet control device 36 Auxiliary blade 37 Cover A1, B1, C1 Wiping range

Claims (7)

A wiper arm supported by the pivot shaft and operating around the pivot shaft;
A wiper device that is attached to the wiper arm and wipes a windshield of a vehicle when the wiper arm is operated,
An operating mechanism is provided for operating the wiper blade in a radial direction about the pivot axis with respect to the wiper arm ;
The operating mechanism is to operate the wiper blade with respect to the wiper arm by magnetic force,
The wiper device includes : a permanent magnet provided on the wiper blade; and an electromagnet provided on the wiper arm and generating a magnetic force to operate the wiper blade together with the permanent magnet . The wiper device according to claim 1,
A support portion for supporting the wiper blade is provided at an end portion of the wiper arm in a length direction opposite to an end portion connected to the pivot shaft, and the wiper arm, the pivot shaft, and the support portion are provided on the end portion. is cable housing the electric wire for supplying current to the electromagnet is accommodated that provided the wiper device. The wiper device according to claim 2,
The wiper blade has a holder and a blade rubber,
A wiper device provided with a guide mechanism that enables the holder to operate with respect to the support portion . The wiper device according to claim 3 .
The guide mechanism is
A convex portion provided on the support portion;
A recess provided in the holder;
And the holder is slidable along the convex portion . In the wiper device according to any one of claims 1 to 4,
A wiper device, wherein the wiper arm is provided with an auxiliary blade for wiping the windshield inside a range in which the wiper blade wipes the windshield in a radial direction about the pivot shaft. In the wiper device according to any one of claims 1 to 5,
The operation mechanism detects an operation angle of the wiper arm with respect to a stop position of the wiper arm, and based on the detected operation angle of the wiper arm, the wiper blade in a radial direction about the pivot shaft Wiper device that determines the position of the. The wiper device according to claim 6, wherein
An electric motor for rotating the pivot shaft;
A sensor for detecting a rotation state of the output shaft of the electric motor and outputting a detection signal;
Is provided,
The wiper device, wherein the operation mechanism detects an operation angle of the wiper arm from a detection signal of the sensor.

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