JPH10258708A - Wiper holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a wiper holder to lift up a wiper arm surely, preventing fluttering due to vibration in time of its lifting up and simultaneously to obviate any hindrance to the range of sight from a cabin in time of this lifting up motion. SOLUTION: When a wiper arm 108 is uplifted, it is made so as to be lifted up aslant in front of a vehicle, not merely lifting it upward. With this constitution, the wiper arm 108 is hidable in space between a cowl cover and a bonnet, and thereby improvements in appearance and an extensive vista from a cabin are well promotable. In addition, at the time of this wiper arm 108 uplifted, since nearby spots at both ends of a wiper blade are made to work in the direction of checking this lifting motion by a keep plate, a wiper unit is formed into a three-point support, so that any possible fluttering due to vibration are preventable from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a wiper device for reciprocating a wiper blade attached to a wiper arm along a windshield glass surface to wipe the windshield glass surface, and does not use the wiper device. The present invention relates to a wiper holding device that sometimes reduces and holds the contact pressure between the wiper blade and the windshield glass.

[0002]

2. Description of the Related Art Conventionally, in a lift-up mechanism of a wiper device, a manual operation is often used.

[0003] This is attached to a part of a wiper arm or a wiper blade, and a leg member is protruded by operating a lever, so that the wiper blade is floated from a windshield glass surface. At the start of the operation of the wiper device, the leg member is retracted and accommodated by the urging force accompanying this operation.

In such a manual lift-up mechanism, a lever operation for manually pushing out the leg member must be performed every time the operation of the wiper device is completed, which is troublesome.

Therefore, various structures have been proposed for lifting and lowering the wiper arm by the driving force of a motor.

For example, a motor is mounted near the cowl cover, a cam lever is mounted at a position deviated from the rotation center of the motor, and the cam lever is extended to a position below the wiper arm in the lift release position. The motor is driven and the cam lever is 180
When the cam lever rotates, the wiper arm is lifted by the cam lever (see Japanese Patent Application Laid-Open No. 4-54755).

There has also been proposed a structure in which a rod that expands and contracts by energizing and de-energizing the solenoid corresponds to a wiper arm using a solenoid or the like (for example, Japanese Utility Model Laid-Open No. 6-1046).

[0008]

However, in the conventional lift-up mechanism, the idea is to simply lift up the wiper arm. Usually, the wiper blade rotatably supported by the wiper arm is in a lift-up state. Little consideration has been given to the occurrence of shaking and fluttering.

For this reason, the lifted wiper blade shakes and flutters due to the vibration of the engine, the vibration during running of the vehicle, the running wind, and the like, and the noise is transmitted to the cabin, causing discomfort to the occupant. Will give.

[0010] Further, simply raising the lift may cause a hindrance to the view from the cabin.

In view of the above facts, the present invention can reliably lift the wiper arm, prevent fluttering at the time of lifting, and prevent obstruction of the view from the cabin at the time of lifting. The aim is to obtain a wiper holding device.

[0012]

The invention according to claim 1 is used in a wiper device for reciprocating a wiper blade attached to a wiper arm along a windshield glass surface to wipe the windshield glass surface. ,
A wiper holding device for reducing and holding a contact pressure between the wiper blade and a windshield glass when the wiper device is not used. The wiper holding device is provided corresponding to an initial stop position of the wiper arm. The apparatus has lift-up means for lifting up from the shield glass surface, and stop-position holding means for preventing swinging of the wiper blade during lift-up by the lift-up means and holding the wiper blade in a predetermined posture.

According to the first aspect of the invention, when the wiper arm is lifted up by the lift-up means, swinging of the wiper blade in the lift-up state of the wiper arm is prevented by the stop posture holding means. For this reason, the wiper blade repeatedly contacts and separates from the windshield glass surface due to vibration and running wind,
So-called fluttering can be prevented.

The means for recognizing the initial stop position by the wiper arm can be obtained by detecting a signal from a cam switch applied to a well-known automatic fixed position stop device (for example, see Japanese Patent Laid-Open No. 59-11809). Good.

The invention according to claim 2 is used for a wiper device for wiping a windshield glass surface by reciprocating a wiper blade attached to a wiper arm along a windshield glass surface. A wiper holding device that reduces and holds the contact pressure between the wiper blade and the windshield glass during use,
Provided corresponding to the initial stop position of the wiper arm,
Lift-up means for lifting the wiper arm or the wiper blade from the windshield glass surface by a predetermined distance; and a lift-up means provided corresponding to the initial stop position of the wiper blade. A limiting member that elastically limits the lift-up operation of the wiper blade over a short distance.

During the lift-up in which the dusting wiper arm or the wiper blade is lifted by the lift-up means, the lift-up operation is restricted by the elasticity of the wiper blade by the limiting member. As a result, the wiper blade is restricted in the lift-up state. It will be held down by the member. Therefore, it is possible to prevent the wiper blade from swinging and fluttering in the lift-up state.

According to a third aspect of the present invention, the lift-up means includes a lift-up cam rotatably driven by a motor between a lift-up position and a lift-release position of the wiper arm or the wiper blade. The cam is restrained at the lift-up position and the lift release position, and the power to the motor is cut off based on a change in current value due to the restraint.

According to the third aspect of the present invention, a motor is used as a drive source, and the lift-up cam rotated and driven by the motor is mechanically restrained at a lift-up position and a lift-release position. is there. For this reason, the lift-up cam stops at the correct position. In addition, overcurrent flows through the motor due to the mechanical restraint of the lift-up cam,
Since the motor is cut off by detecting this overcurrent, it is impossible to operate even if snow accumulates around the lift-up cam or wiper blade and the lift-up cam is restrained by freezing. The power supply to the motor can be cut off without performing the operation, thereby preventing the motor from burning.

According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the lift-up means engages with a wiper arm or a wiper blade to rotate the wiper arm or the wiper blade by rotating a crankshaft. The cam lever has a guide inclined surface for moving the wiper arm or the wiper blade in the direction opposite to the wiping start direction of the wiper arm with the lift-up operation. And a gradually lower slope surface.

According to the fourth aspect of the present invention, at the time of the lift-up operation, the wiper arm or the wiper blade is engaged with the guide inclined surface, so that the guide inclined surface moves the wiper arm or the wiper blade by rotating the crankshaft. In the direction opposite to the wiping start direction, for example, in the gap between the cowl cover on the front side of the vehicle and the rear end of the engine hood. Therefore, the view from the cabin is not obstructed.

In the lift-up state, since the wiper arm or the wiper blade is engaged with the slope surface, when the wiper arm starts wiping, the wiper arm moves along the slope surface and reaches the windshield glass surface. Drop impact from the position is reduced.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a friction reducing protection member for smoothly sliding is interposed on a contact surface between the cam lever and the wiper arm or the wiper blade. Features.

According to the fifth aspect of the present invention, since the wiper arm and the cam lever naturally come into contact with each other and lift up, if they are repeated for a long period of time, they may be worn or broken. Then, by interposing the friction reducing protection member at the contact portion, the friction coefficient is reduced, and as a result, the wiper arm can be smoothly slid along the guide slope.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION

(Basic Structure of Wiper Device) FIG. 1 shows a part (a front windshield glass 102 and its periphery) of a vehicle to which a wiper device 100 according to the present embodiment is attached.

A pair of wiper blades 106 of the wiper device 100 are arranged as initial stop positions below the front windshield glass 102 whose lower end is supported by the cowl cover 104.

The longitudinal direction of the wiper blade 106 is the vehicle width direction, and the tip of a wiper arm 108 is attached to the center of the longitudinal direction.

The other end of the wiper arm 108 is attached to a rotating shaft (not shown) projecting from the cowl cover 104, and the rotating shaft is rotated by the driving force of a motor 110 (shown only in the block diagram of FIG. 8). By doing so, the wiper arm 108 can be reciprocated in a pendulum shape about the rotation axis.

The wiper arm 108 is provided with a biasing means such as a tension coil spring (not shown), and is biased in the direction of the front windshield glass 102.

As shown in FIG. 2, the wiper arm 1
08 primary lever 1 rotatably connected to the tip of
12 are attached to the longitudinal middle of the secondary lever 114 at both ends in the longitudinal direction.

Here, an opening 116 is provided at a connection portion of the primary lever 112 with the wiper arm 108.
Are provided, and a pair of side wall portions 118 is provided upright. A rivet 120 is hung over the side wall portion 118, and a rectangular block-shaped clip 122 is supported between the pair of side wall portions 118 so as to be rotatable around the rivet 120.

On the other hand, the tip of the wiper arm 108 is substantially U
The clip 12 is bent in the shape of a letter.
2, and the wiper arm 108 and the primary lever 112 are connected.

The primary lever 112 has a substantially U-shaped cross section in the width direction with an open surface facing the front windshield glass 102, and has a pair of opposed side walls at both ends in the longitudinal direction. , A coaxial circular hole is provided.

On the other hand, the secondary lever 114 has a substantially U-shaped cross section in the width direction with an open surface facing the front windshield glass 102, and a pair of side walls facing each other in the center in the longitudinal direction. A coaxial circular hole is provided between the portions.

Here, a rivet 124 is inserted from one side wall of the primary lever 112, passes through the circular hole of the secondary lever 114, and protrudes from the other side wall.
By caulking, the secondary lever 114 can be supported rotatably with respect to the primary lever 112.

A yoke lever 126 is rotatably attached to both ends of the secondary lever 114 in the longitudinal direction in the same structure as the connection structure between the primary lever 112 and the secondary lever 114.

As described above, one primary lever 11
2, two so-called tournament-type structures in which two secondary levers 114 are attached and two yoke levers 126 are respectively attached to the two secondary levers 114.

The yoke lever 126 has a substantially U-shape in cross section in the width direction having an open surface facing the front windshield glass 102. Both ends in the longitudinal direction are widened in a rectangular shape, and are opposed to and parallel to each other. Holding part 128
Are formed. The holding portion 126 is bent at a substantially right angle in a direction in which the tips slightly approach each other to form a locking claw (not shown).

The blade rubber 132 is held by the holding portion 128. As shown in FIG. 3, the blade rubber 132 has a lip portion 13 for wiping the front windshield glass surface along the longitudinal direction.
4 are provided. That is, the wiper arm 10
By the reciprocating rotation of the pendulum 8, the lip portion 134 moves while being in contact with the front windshield glass surface, and wipes off water droplets and the like. The neck 136 is supported so as to support the lip 134 in a suspended state.
The held member 138 is integrally formed with the intervening member. A metal or resin backing 140 is fitted into the held member 138 along the longitudinal direction, and the wiper blade 1
06 is held substantially linearly.

The held member 138 and the lip 1
34, the width of the neck portion 136 is smaller than that of the held member 138 and the lip portion 134, and the holding portion 128 surrounds the held member 138 and engages with the tip of the holding portion 128. By locking the pawl,
The wiper blade 106 is held by a yoke lever 126. (Holding Structure of Wiper Device) As shown in FIGS. 1 and 3, the wiper device 100 is provided with a wiper holding device 200 according to the present embodiment.

Since the left and right wiper devices 100 have the same structure, only one (driver's seat side) wiper holding device 200 will be described, and the other (passenger seat side) wiper holding device 200 will be described. Will not be described.

The wiper holding device 200 includes a pressing plate 202 as a restricting member and a main unit 204.

As shown in FIG. 3, the holding plate 20
Reference numeral 2 is formed by bending a flat plate into a substantially crank shape.
The pressing plates 202 are arranged near both ends in the longitudinal direction at the normal stop position (initial stop position) of the wiper blade 106 (or slightly near the center).

The longitudinal direction of the holding plate 202 is provided in the front-rear direction of the vehicle (the direction of arrow J in FIG. 3), and the front side thereof is fixed to the cowl cover 104 with bolts and nuts (not shown). For this reason, the holding plate 20
2, a gap (dimension G in FIG. 3) is formed between the cowl cover 104 and the front end (the end on the rear side of the vehicle).
It is extended to a position where it overlaps above the wiper blade 106. In this state, there is a slight amount (dimension S) between the lower end surface of the holding plate 202 and the wiper blade 106.
Gap has occurred. When the wiper blade 106 is at the normal stop position, the wiper blade 106 is stopped with a margin in the depth direction (bent portion) of the pressing plate 202, and the wiper blade 106 is stopped.
Can be moved to the gap G.

On the other hand, a main unit 204 is disposed between the pair of pressing plates 202 and substantially at the center of the wiper arm 108 in the longitudinal direction.

As shown in FIGS. 4 to 6, the main unit 204 is covered with a casing 206 made of synthetic resin. The casing 206 includes a base 208 and a lid 210.
It is composed of

As shown in FIG. 5, inside the base 208, a groove 212A having an arc-shaped bottom surface and a substantially rectangular periphery is provided.
And a groove 212B having a flat bottom surface and a substantially circular periphery are formed.

A groove 214A houses a motor 214 having a cylindrical outer diameter. The motor 214 is a DC motor that rotates forward and reverse by reversing the polarity. The radius of curvature of the outer periphery of the motor 214 and the groove 212A
Has the same radius of curvature as the bottom surface.

The rotating shaft 216 of the motor 214 protrudes toward the groove 212B. This rotating shaft 216 has
A worm gear 218 having a spiral worm is attached.

The groove 212B is provided with a circular hole 220 at a concentric position of the inner circular shape, and the circular hole 220 is formed on the groove 212B side.
A cylindrical protruding portion 222 is provided from the periphery of the zero. A spur gear 224 is disposed in the groove 212B. On the surface of the spur gear 224 facing the projection 222,
The small-diameter cylindrical portion 22 inserted into the inner periphery of the protrusion 222
6 is formed, and this small-diameter cylindrical portion 226 is
Are supported by the through holes. Here, the protrusion 22 is provided between the spur gear 224 and the bottom surface of the groove 212B.
A gap corresponding to the height dimension of 2 is generated. An O-ring 228 is inserted into a columnar projection V integrally formed from the bottom surface in a part of the donut-shaped gap, and is fixed with an adhesive or the like.

On the other hand, a fan-shaped protruding portion 230 is integrally formed on the surface of the spur gear 224 facing the bottom surface of the groove portion 212B. The fan-shaped protruding portion 230 is formed as an arc groove whose both ends have the same radius of curvature as the radius of curvature of the outer periphery of the O-ring 228. The opening angle of the fan-shaped projection 230 (between the centers of the arcs at both ends) is set to 180 °. Since the fan-shaped protrusion 230 is disposed in the gap, it interferes with the O-ring 228 when the spur gear 224 rotates. Therefore, the rotation range of the spur gear 224 is 180 °
Is limited to

A spur gear 224 is provided in the circular hole 220 provided in the center of the groove 212B and the through hole of the protrusion 222.
A shaft 232 having one end attached thereto is inserted into the center thereof, and the other end protrudes outside the base 208.

A lift-up cam 234 is attached to the protruding shaft 232 serving as a crankshaft.

The lift-up cam 23 as shown in FIG.
Reference numeral 4 denotes a base portion 238 provided with a circular hole 236 into which the shaft 232 is fitted, and a cam portion 240 formed integrally with the base portion 238 so as to be stepped in the axial direction of the shaft 232.
And a cam lever 242 protruding from the cam portion 240 in the axial direction of the shaft 232.

The lift-up cam 234 rotates the shaft 232 so that the cam portion 240 rotates around the shaft 232, and its rotation range is 180 ° as described above.
It has become.

When the lift-up cam 234 is in the lift release position, the cam portion 240 is located below the shaft 232 (the state shown in FIG. 7A-1). Here, the wiper device 100
When the wiper arm 108 is at the initial stop position, the cam lever 242 protruding from the cam portion 240 enters the lower side of the wiper arm 108 (a gap between the wiper arm 108 and the cowl cover 104) (FIG. 7). (State of (A-2)).

At this time, the facing surface between the cam lever 242 and the wiper arm 108 is flat.

Next, when the shaft 232 is rotated by 90 ° by the driving force of the motor 214, the cam portion 240 is moved to the lateral position of the shaft 232, and the cam lever 242 moves slightly above the lift release position (toward the wiper arm 108). (The state of FIG. 7 (B-1)). During this movement, the wiper holding device 200 moves the mounting position of the wiper arm 10 so that the wiper arm 108 and the cam lever 242 are engaged.
8 is set corresponding to the initial stop position. The setting of the mounting position will be described later.

At this time, the cam lever 242 is formed with an inclined portion 244 that gradually becomes lower as the wiper arm 108 moves from the initial stop position in the direction opposite to the direction in which wiping starts. For this reason, during the lift-up operation of the cam lever 242, the wiper arm 108 engaged with the inclined portion 244 and lifted against the urging force against the glass surface.
Is guided by the inclined portion 244 during the 90 ° rotation using the urging force of the wiper arm 108 against the glass surface,
The direction opposite to the direction in which the wiper arm starts wiping from the initial stop position (the base side of the cam lever 242).
Will be guided to the base side of. Since this movement creates a gap in the depth of the holding plate, it is moved without any obstacle (the state of FIG. 7B-2).

This movement is a position where the wiper arm 108 is hidden by the hood 246 in a plan view of the vehicle.

The lift-up cam 234 includes a motor 214
The motor is further rotated by 90 ° and stopped (see FIG. 7 (C-
1) state). In this state, the wiper arm 108 of the wiper device 100 is held, and the wiper arm 1
08 is set to be slightly larger than the gap S between the holding plate 202 and the wiper blade 106. As a result, the wiper blade 10
6 against the front windshield glass 102 (or the cowl cover 104) with almost no pressing force.
Can be held in a contact state close to the above or in a state where a slight gap is generated.

In this holding state, the wiper blade 106 is prevented from swinging and fluttering with respect to the wiper arm 108 due to engine vibration, vibration during running of the vehicle, running wind, and the like.

At this time, on the surface of the cam lever 242 facing the wiper arm 108, the slope 2 gradually lowers in the direction in which the wiper arm starts wiping from the initial stop position (the tip side of the cam lever 242).
48 are formed. The slope 248 moves along the slope 248 toward the front windshield glass 102 at the start of the operation of the wiper device 100, and has a role of alleviating a drop impact of the wiper blade that may occur by lifting.

Here, on the outer peripheral surfaces of the cam lever 242 and the contact wiper arm 108, a coating film protecting agent 249 for reducing the friction coefficient and preventing the coating film from peeling off by engagement with the cam lever 242 is applied. For this reason, even if the lift-up operation is repeatedly performed, it is possible to prevent the wiper arm 108 and the cam lever 242 from being damaged (see FIG. 7C-2). (Height Position Adjusting Mechanism) A base 208 constituting the casing 206 of the wiper holding device 200 is assembled by screwing a plurality of locations with screws while being closed by the lid 210.

A rectangular block-shaped screwing portion 258A protrudes from the side surface of the base 208 on the side surface of the groove portion 212B of the casing 206 as a part of the screwing portion.
Correspondingly, a screwing portion 258B of the same shape is also integrally formed on the lid 210. This screwed part 258
A and 258B are provided with circular holes 260, respectively.

Here, this screwed portion is also used for adjusting the height position when the wiper holding device 200 is attached to the cowl cover 104.

That is, the height adjustment bracket 262 having a substantially U-shaped cross section and having a space substantially the same as the combined width dimension of the screwing portions 258A and 258B when the base 208 and the lid 210 are fitted together, This screwed part 258A,
258B.

The height adjustment bracket 262 has a pair of opposed side walls 262A provided with long holes 264. Further, lower ends of the side wall portions 262A are bent at substantially right angles in directions away from each other to form leg portions 262B, and serve as fixing portions to the cowl cover 104.

Here, when the screw portions 258A and 258B are sandwiched by the side wall portion 262A, the screw 266 is passed through the long hole 264, the circular hole 260, and the long hole 264 in this order, and when the nut 268 is screwed, The screw portions 258A and 258B can be adjusted in the height direction within the range of the long hole 264.

As shown in FIG. 5, the side surface of the casing 206 on the side of the groove 212A is slightly thicker than the others. This thick side wall portion 270 has a narrow rectangular groove 272.
Is provided. A metal and rectangular nut 274 is accommodated in the groove 272. The nut 274 is completely housed in the groove 272, and cannot rotate in the housed state.

A circular hole 276 is provided in the thick side wall portion 270 coaxially with the female screw hole of the nut 274 in which the rotation is impossible.

On the other hand, the lid 210 is fitted to the base 208 so as to close the opening of the groove 272 in which the nut 274 is accommodated.

The outer peripheral surface of the thick side wall portion 270 has a substantially L
A letter-shaped height adjustment bracket 278 is supported. The main surface of the height adjustment bracket 278 (thick side wall portion 270)
A long hole 280 is provided on a surface that contacts the cowl cover 104.

Here, the screw 282 is inserted into the elongated hole 280 and the circular hole 2
By inserting in the order of 76 and screwing into the nut 274 housed in the groove 272 in a non-rotatable state, the height is determined at the insertion position of the elongated hole 280, and the height adjustment bracket 278 can be fixed.

That is, a place where the screw does not penetrate the opposite surface, or a place where a long screw is required to penetrate the screw. In the case where the female screw must be formed of a material that is easily damaged, the female screw can be formed on the base 208 made of synthetic resin by embedding the nut 274 as in the present embodiment. This eliminates the necessity and eliminates the disadvantage that the thread of the female screw is damaged when screwing is repeated many times, such as height adjustment.

As a method for solving such a problem, it is conceivable that the nut 274 is formed by insert molding when the synthetic resin base 208 is formed, but in that case, workability is poor and cost is high. Become. However, in the present embodiment, the nut 274 is prevented from being rotated by being inserted into the groove 272 of the base 208 without being insert-molded, and the base 208 is locked by the lid 210.
And the nut 274 in a closed state can be held without falling off from the groove 272. (Drive Control of Wiper Device and Wiper Holding Device) FIG. 8 is a drive circuit diagram of the wiper device 100 and the wiper holding device 200.

One contact of an ignition switch (hereinafter, referred to as IG) 302 is connected to the positive terminal of the battery 300, and the negative terminal is grounded.

The other contact of the IG 302 is connected to a diode 3
It is connected to one end of a resistor 306 and a capacitor 308 which constitute a timer circuit via a line 04. Capacitor 30
8 is grounded, the other end of the resistor 306 is connected to the base of an NPN transistor (hereinafter referred to as TR) 310, and the base is grounded via a resistor 312.
The emitter of TR 310 is grounded via resistor 314. The collector of the TR 310 is connected to a PNP transistor (hereinafter referred to as TR) 32 through resistors 316 and 318.
0 is connected to the emitter. Between the resistors 316 and 318,
The collector of TR310 is connected to the controller 322 and the base of TR320 is connected. The controller 322 is grounded, so that when the IG 302 turns on, the TR 310 and TR 320 turn on, so that power can be supplied to the controller 322.

The controller 322 includes the IG 30
2 are connected via a resistor 324,
An ON / OFF signal of the IG 302 is input. The controller 322 is connected to one contact of a wiper switch (hereinafter referred to as WP) 326, and the other contact of the WP 326 is grounded. For this reason, WP326
Are input to the controller 322.

The positive terminal of battery 300 is connected to coils 328 and 33 of a pair of relay circuits for driving motor 214 of wiper holding device 200 according to the present embodiment.
0, and the contacts are switched independently by excitation and non-excitation of the coils 328 and 330, respectively.
A relay switch 332 for controlling forward rotation, reverse rotation, and stop of the
334 are connected to respective first contacts. The second contacts of the relay switches 332 and 334 are connected and grounded.

Further, both terminals of the motor 214 are connected to the common terminals of the relay switches 332 and 334, respectively.

The other ends of the coils 328 and 330 are connected to the collectors of NPN transistors (hereinafter referred to as TR) 336 and 338, respectively, and the emitters are grounded.

The bases of the TRs 336 and 338 are connected to the controller 322 via the resistors 340 and 342, and are turned on / off in response to a signal from the controller 322.

The plus terminal of the battery 300 is
The motor drive circuit 344 for driving the motor 110 of the wiper device 100 is connected. Motor drive circuit 3
44 is grounded and both ends of the motor 110 are connected. As the motor drive circuit 344, for example, a relay circuit or the like can be applied.

The wiper device 100 using the motor 110
Can be detected by the cam switch 346.

That is, the cam switch 346 is turned on / off in conjunction with the driving of the motor 110, but the contact of the cam switch 346 is switched when the wiper arm 108 of the wiper device comes to the initial stop position. One end of the cam switch 346 is connected to the controller 322, and the other end is grounded, so that the controller 322 can recognize the switching state of the contact. (Automatic Fixed Position Stopping Device) The ON / OFF of the cam switch 346 can be replaced by the conduction and non-conduction of both terminals 408 of the automatic fixed position stopping device which is killed in FIG. That is, as shown in FIGS. 9A and 9B, the worm wheel L that engages with the worm K formed on the rotating shaft of the motor main body of the wiper motor 110 to reduce the worm speed in one direction around the output shaft 400 Continuous rotation.

A projection 400A is formed on the surface of the worm wheel L opposite to the output shaft 400.
The protrusion 402A of the disk 402 abuts on 00A and the disk 40
2 rotates coaxially with the output shaft 400. Disk 40
2 includes a small-angle fan-shaped conductive plate 404 in which the two terminals 408 are in sliding contact with the rotational position of the worm wheel L corresponding to the initial stop position of the wiper arm, and a large-angle fan-shaped conductive plate in which one terminal is in contact. 406 are provided.

The state where the conductive plate 406 is in contact with one terminal is the state where the cam switch 346 in FIG. 8 is off, and the state where the two pairs are in contact with the conductive plate 404 is FIG. Is in the ON state.

During normal rotation when the IG 302 is on and the WP 326 is on, the terminal 408 and the conductive plate 40
4, 406, regardless of the contact state.

Here, during the wiper wiping operation, that is, when one terminal is in sliding contact with the conductive plate 406 (the cam switch 346 is in the off state), the WP 326 or the IG 302
Is opened, the controller 322 detects that the cam switch 346 is out of the off-field, and the wiper motor 1
10 controls the drive of the motor drive circuit 344 so that the rotation is continued.

Then, the conduction plate 40 which is the rotational position of the worm wheel L corresponding to the initial stop position of the wiper arm
4 and the two terminals 408 contact each other, the controller 3
At 22, the motor drive circuit 344 is controlled to stop the wiper motor 110 when the cam switch 346 is turned on. Thus, the wiper motor 11
In the case of “0”, the wiper arm stops at the initial stop position because it stops when the conductive plate 404 and the two terminals 408 are in contact with each other.

The capacitor 3 constituting the timer circuit
08 and the resistor 306 enable power to be supplied to the controller 322 for a predetermined time even if the IG is opened during the wiper wiping operation.

During the normal rotation, the WP 326 or IG30
When the two terminals 408 and the conductive plate 404 are in contact with each other when the terminal 2 is opened, the controller 3
22 detects that the cam switch 346 is on, and the wiper motor 110 is immediately stopped.

The operation of the present embodiment will be described below. (Procedure for Assembling Main Unit 204 and Adjusting Height Position) The motor 214 is housed in the groove 212A of the base 208 of the main unit 204, the O-ring 228 and the spur gear 224 are housed in the groove 212B, and the nut 274 is housed in the groove 212A. After that, the opening of the base 208 is closed by the lid 210.

Next, a rectangular block-shaped screwing portion 258 provided on the side surface of the casing 206 on the groove 212B side is used.
A, 258B is fitted with the height adjustment bracket 262,
It passes through the screw 266 and is screwed with the nut 268. At this time, it is not firmly fixed but is screwed slightly loosely.

Next, the height adjustment bracket 278 is aligned with the side surface of the casing 206 on the groove 212A side, and the screw 282 is inserted into a circular hole 276 provided on the side surface.

The thick side wall portion 270, which is the side surface of the groove portion 212A, is provided with a narrow rectangular groove 272, and the nut 274 is housed in a state where the nut 274 is prevented from rotating in advance. 282 is screwed with the nut 274.

As described above, in a place where the screw 282 does not penetrate the opposite surface, the base 210 of the present embodiment is used.
In the case where the female thread has to be formed in a material which is likely to be broken or broken easily due to the repetition of screwing, if the nut 274 is embedded in advance, the female screw is formed in the base 210. It becomes unnecessary to do it.

Note that this screw 282 is not firmly fixed,
Screw it slightly loosely. When the main unit 204 assembled as described above is attached to the cowl cover 104, the main unit 204 is fixed to a substantially central portion in the longitudinal direction of the wiper arm 108 with screws or the like via height adjustment brackets 262 and 278, and the wiper arm 108 is lifted up. Cam 234
It is necessary to adjust the relative position between the cam lever 242 and the cam lever 242. This relative position adjustment is performed by adjusting the height of the main unit 204.

That is, the height adjustment brackets 262, 2
Since the screws 266 and 282 for fixing the screw 78 are slightly loosened when screwed together, the height adjustment brackets 262 and 278 are used.
After fixing to the cowl cover 104, the main unit 2
04 can be moved in the longitudinal direction of the slots 264 and 280. This movement causes the wiper arm 108
And the cam lever 242 is adjusted to finally fix the screws 266 and 282 firmly. The height adjustment is different depending on the type of the wiper device 100 and the type of the wiper device 100, and the position may be shifted with time. However, the height adjustment can be easily performed each time, and the screw 282 in the thick side wall portion 270 and the nut 274 are also used. Is embedded, so that even if the screwing is repeated every time the height is adjusted, it is possible to solve the problem that the thread of the female screw is broken.

On the other hand, the holding plate 202 which forms another part of the wiper holding device 200 is
6, only the screws are fixed to the cowl cover 104 corresponding to the vicinity of both ends, and subsequent adjustment is unnecessary. (Operation of the Wiper Holding Device) The wiper holding device 200 is based on the premise that the wiper arm 108 of the wiper device 100 is at the initial stop position, and the position detection will be described later in a control time chart. The mechanical operation of the wiper holding device 200 will be described on the assumption that 108 is at the initial stop position.

First, when the wiper arm 108 is at the initial stop position, the front end of the pressing plate 202 attached to the longitudinal end of the wiper blade 106 or a position slightly closer to the center than both ends and the cowl cover 104 are connected. The wiper blade 106 is located in the gap G between them. However, in this state, a gap S is provided between the upper end of the wiper blade 106 and the lower end of the pressing plate 202. In addition, the depth is in a state where there is some margin.

On the other hand, the cam lever 242 of the lift-up cam 234 of the main unit 204 is
In the gap between the cowl cover 104 and the substantially central portion.

When the motor 214 is driven in this state (the state shown in FIGS. 7A-1 and A-2), first, the shaft 232 is driven.
At the time of rotating 90 ° about the lift-up cam 23
4 is in the horizontal position of the shaft 232 (see FIG.
1, state B-2). During this 90 ° rotation, the cam lever 242 comes into contact with the wiper arm 108. When the rotation continues, the wiper arm 108 is pushed up by the cam lever 242, and the wiper arm 108 is pushed by the inclined portion 244 formed on the cam lever 242.
Moves to the base side of the cam lever 242 using the urging force of the wiper arm against the glass surface. This movement has a margin in the depth direction of the holding plate 202, so that the movement can be performed smoothly. That is, the vehicle is continuously lifted diagonally forward. Thereby, the wiper arm 108 moves to the back of the cowl cover 104 (the direction opposite to the direction in which the wiper arm starts wiping from the initial stop position),
Because it hides in the gap with the bonnet, it looks better in design. Also, the outlook from the cabin is improved.

The motor 214 continues to rotate, and
When the wiper arm 108 is lifted obliquely forward of the vehicle by the rotation of 0 °, the wiper arm 108 further rotates by 90 ° and stops. That is,
The motor 214 is rotated by 180 degrees by one drive (FIG. 7 (states C-1 and C-2). The rotation of 180 degrees is provided in the main body unit 204, and
4 is provided with a fan-shaped projection 230 on a spur gear 224 which receives the driving force via the worm gear 218.
Since the O-ring 228 is provided as a stopper in the movement area of 0, rotation of 180 ° or more can be mechanically prevented. Note that an overcurrent occurs in the motor 214 due to the rotation limitation, and the power supply to the motor 214 is cut off by detecting the overcurrent.
Therefore, for example, the hood 246 and the cowl cover 1
Even when the wiped snow accumulates and freezes in the space of 04 and the rotation of the cam lever 242 is restricted, power supply to the motor 114 can be cut off, and burning of the motor can be prevented.

When the cam lever 242 rotates 180 °,
The wiper arm 108 is lifted by the height dimension H, whereas the wiper blade 106 can be lifted only by the height dimension S (S <H) by the pressing plate 202. The window shield glass 102 is held in a state where the pressing force is almost zero or the window shield glass 102 is slightly lifted. In addition, the wiper blade 106 does not flutter due to the vibration of the engine, the vibration during traveling, and the traveling wind, and the quiet production can be maintained.

When the cam lever 242 is rotated by 180 °, a slope 248 is formed on the support surface of the wiper arm 108.
When the wiper arm 108 is operated, the wiper arm 108 moves along the slope 248, and the drop impact at the time of transition from the cam lever 242 to the front windshield glass 102 is reduced, thereby suppressing the generation of an impact sound. Will not damage.

When the wiper device 100 starts operating, the motor 214 of the wiper holding device 200 also starts reverse rotation, and the lift-up cam 234 rotates 180 around the shaft 232.
Rotate to the original position (state of Fig. 7 (A-1, A-2))
To return to the next wiper arm 108 and wiper blade 1
Wait for stop at the initial stop position of 06.

As described above, according to the present embodiment, the wiper blade 106 is lifted while being pulled obliquely forward of the vehicle, instead of simply being lifted upward. And the hood can be hidden, so that the appearance can be improved and the visibility from the cabin can be improved.

Further, when the wiper arm 108 is lifted, the vicinity of both ends of the wiper blade 106 is caused to act in a direction in which lifting is prevented by the pressing plate 202, so that the wiper device 100 is elastically engaged and supported at three points. Variation due to vibration can be prevented. (Operation Timing Control of Wiper Holding Device 200-Part 1) As shown in FIG. 10, first, when the WP 326 is turned on while the IG 302 is turned on, the wiper device 10
The zero motor 110 starts driving based on the wiper motor drive circuit 344. Thereby, the wiper blade 1
06 can wipe the surface of the front windshield glass 102 to remove water droplets and the like.

At the same time as the driving of the motor 110 for the wiper device 100 is started, the motor 214 of the wiper holding device 200 also starts to rotate in reverse, and the cam lever 242 of the lift-up cam 234 is moved to the lower position (FIG. 7A-1). State).

Here, when the WP 326 is turned off, the above-described automatic fixed position stop device operates. That is, when the cam switch 346 is turned on, that is, when the conduction of both terminals is confirmed, it can be recognized at that point that the wiper arm 108 is at the initial stop position.

Then, based on the detection of the conduction of the cam switch 346, the drive of the motor 214 of the wiper holding device 200 is started, and the cam lever 2 of the lift-up cam 234 is started.
42 allows the wiper arm 108 to be lifted.

Thereafter, when the wiper device 100 operates, the above operation is repeated, and otherwise, the lifting of the wiper arm 108 is maintained regardless of whether the IG is on or off. (Operation Timing Control of Wiper Holding Device 200-Part 2) As shown in FIG. 11, first, when the WP 326 is turned on with the IG 302 turned on, the wiper device 10
The zero motor 110 starts driving based on the wiper motor drive circuit 344. Thereby, the wiper blade 1
06 can wipe the surface of the front windshield glass 102 to remove water droplets and the like.

At the same time as the drive of the motor 110 for the wiper device 100 is started, the motor 214 of the wiper holding device 200 also starts to rotate in the reverse direction, and the cam lever 242 of the lift-up cam 234 is moved to the lower position (see FIG. 7 (A-1)).

Here, when the WP 326 is turned off, the above-described automatic fixed position stop device operates. That is, when the cam switch 346 is turned on, that is, when the conduction of both terminals is confirmed, it can be recognized at that point that the wiper arm 108 is at the initial stop position.

When the wiper arm 108 is stopped without the initial stop, and the IG 302 is kept on, the wiper holding device 200 does not perform any operation and enters a standby state. When the IG 302 is turned off during the standby state, the IG 302 is turned off and the cam switch 346 is turned off.
From the wiper holding device 200 based on both the confirmation signal that the wiper arm 108 is at the initial stop position.
Of the motor 214 is started, and the lift-up cam 23 is started.
The wiper arm 108 can be lifted by the fourth cam lever 242.

As described above, since the wiper holding device 200 is operated based on the turning off of the IG 302 and the turning on of the cam switch 346 (the presence of the confirmation signal of the initial stop position), malfunction can be reliably prevented.

Next, the IG 302 is turned on, the engine is started, and even if the engine is started, the lifting state is continued.
With the next operation of the wiper device, the motor 110 of the wiper holding device 200 starts to reversely rotate, and the lift-up cam 234
The cam lever 242 is returned to the lower position (the state of FIG. 7A-1). (Operation timing control of wiper holding device 200-part 3) As shown in FIG. 12, when the IG 302 is turned on, the motor 314 of the wiper holding device 200 is operated by a signal of only turning on the IG 302, and the lift-up cam 234 by moving the cam lever 242 to the lift release position (see FIG. 7A
Return to the state of -1)). When the IG 302 is off, the motor 214 of the wiper holding device 200 is operated,
The cam lever 242 of the lift-up cam 234 is moved to the lifting position (the state of FIG. 7 (B-1 then C-1)).

That is, in this operation timing control,
Basically, the on / off state of WP326, wiper motor 1
The ten operating states are not directly related.

However, when performing the lifting operation of the wiper arm 108 with the IG 202 turned off, it is preferable to confirm the signal from the cam switch 346.

For example, this is because the IG 206 is turned off while the wiper device 100 is in operation while the WP 206 is on.

In such a case, the capacitor 308 of FIG.
Starts the discharge and keeps the TRs 310 and 320 on for a predetermined time, so that the wiper arm 108 is returned to the initial stop position during the predetermined time, and the wiper holding device 200 is turned on based on the ON of the cam switch 346. The motor 214 is operated to perform the lifting operation of the wiper arm 108.

According to the present embodiment, the wiper holding device 2
Operation timing control 00-as shown in the first to third, the lifting operation of the wiper holding device 200 is permitted based on a signal (turning on the cam switch 346) from the automatic home position stop device of the wiper arm 108. For,
An erroneous operation, for example, a lifting operation performed when the wiper arm 108 does not exist or a lifting operation performed during the operation of the wiper device 100 can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a front view of the vicinity of a front windshield glass of a vehicle equipped with a wiper holding device according to the present embodiment.

FIG. 2 is a perspective view of a wiper arm and a wiper blade of the wiper device.

FIG. 3 is a side view of the vicinity of a front windshield glass of a vehicle on which the wiper holding device according to the present embodiment is mounted.

FIG. 4 is a perspective view of the wiper holding device according to the present embodiment.

FIG. 5 is an exploded perspective view of the wiper holding device according to the embodiment.

FIG. 6 is an exploded perspective view showing a part of the wiper holding device according to the embodiment.

FIG. 7 is an operation explanatory diagram showing an operation state of a lift-up cam of the wiper holding device according to the present embodiment.

FIG. 8 is an operation control circuit diagram of the wiper holding device and the wiper device according to the present embodiment.

FIG. 9A is a side sectional view of the automatic fixed position stop device,
(B) is a plan view thereof.

10 is a time chart showing operation timing control (part 1) of the wiper holding device 200. FIG.

11 is a time chart showing operation timing control (part 2) of the wiper holding device 200. FIG.

12 is a time chart showing operation timing control (part 3) of the wiper holding device 200. FIG.

[Explanation of symbols]

REFERENCE SIGNS LIST 100 wiper device 102 front windshield glass (windshield glass) 104 cowl cover 106 wiper blade 108 wiper arm 110 motor 200 wiper holding device 202 holding plate (restriction member) 204 body unit 224 spur gear 228 O-ring 230 fan-shaped protrusion 232 shaft ( Crankshaft) 234 Lift-up cam 244 Inclined portion (inclined guide surface) 248 Slope (slope surface)

Claims (5)

[Claims] 1. A wiper device for reciprocating a wiper blade attached to a wiper arm along a windshield glass surface to wipe the windshield glass surface, wherein the wiper blade and the windshield are used when the wiper device is not used. A wiper holding device that reduces and holds a contact pressure with a shield glass, and is provided corresponding to an initial stop position of the wiper arm,
A wiper having lift-up means for lifting a wiper arm or a wiper blade from a windshield glass surface; Holding device. 2. A wiper device for reciprocating a wiper blade attached to a wiper arm along a windshield glass surface and wiping the windshield glass surface, wherein the wiper blade and the windshield are used when the wiper device is not used. A wiper holding device that reduces and holds a contact pressure with a shield glass, and is provided corresponding to an initial stop position of the wiper arm,
Lift-up means for lifting the wiper arm or the wiper blade from the windshield glass surface by a predetermined distance; and a lift-up means provided corresponding to an initial stop position of the wiper blade. A restricting member that elastically restricts the lift-up operation of the wiper blade over a short distance. 3. The lift-up means includes a lift-up cam that is rotatably driven by a motor between a lift-up position and a lift-release position of the wiper arm or wiper blade, wherein the lift-up cam is positioned at the lift-up position. 3. The wiper holding device according to claim 1, wherein the power supply to the motor is interrupted based on a change in a current value due to the restraint and the lift release position. 4. 4. The lift-up means has a cam lever which engages with a wiper arm or wiper blade to lift up the wiper arm or wiper blade by rotation of a crankshaft. A guide inclined surface for moving the wiper arm or the wiper blade in the direction opposite to the wiping start direction of the wiper arm, and a slope surface gradually lowering with respect to the wiping start direction of the wiper arm are formed. Claim 1
Or the wiper holding device according to claim 2. 5. The wiper holding device according to claim 4, wherein a friction reducing protection member for smoothly sliding is interposed on a contact surface between the cam lever and the wiper arm or the wiper blade.