JP2001219822A - Wiper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper device in a simple structure for completely wiping a wind screen long in the cross or longitudinal direction. SOLUTION: This wiper device comprises a rotationally movable gear member 4 arranged coaxially around an output shaft 2a of a wiper motor 2, a first rotor 5 engaged with the gear member 4, a second rotor 6 engaged with the first rotor 5, a driving arm 3 reciprocally and rotatably moved in combination with the output shaft 2a of the wiper motor 2 for supporting the gear member 4 and the first and second rotors 5, 6, a wiper arm 7 fixed to the second rotor 6, and a wiper blade 8 attached to the wiper arm 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a wiper device for wiping a windscreen with a wiper blade.

[0002]

2. Description of the Related Art As a wiper device for wiping a windscreen with a wiper blade, a pivot shaft is rotated by a wiper motor via a link mechanism, so that a wiper arm connected to the pivot shaft is rotated about the pivot shaft. Moved in an arc above. It is known that the wiper blade wipes the windscreen by reciprocating in an arc while pressing the wiper blade attached to the wiper arm against the windscreen by the circular motion of the wiper arm.

[0003]

With the conventional wiper blade in which the wiper blade makes an arc movement, when a long windscreen is wiped in the lateral direction, the left and right side portions can be left unwiped.
Also, when wiping a long windscreen in the vertical direction, a wiping residue can be left in the upper part of the center. To eliminate these,
The wiper blade is extended by using the link mechanism to extend the wiper arm when the wiper blade wipes the left and right side portions of the windscreen, or by using the link mechanism to extend the wiper arm when the wiper blade wipes the upper center of the windscreen. A wiper device that moves the blade to the side or upper part of the windscreen has been considered, but such a wiper device requires a link mechanism to extend the wiper arm, and the outer shape of the link mechanism is large. There was a problem that it was disadvantageous.

[0004]

An object of the present invention is to provide a wiper device capable of performing a wiping operation on a horizontally long windscreen or a vertically long windscreen without leaving any wiping operation with a very simple structure. The purpose is.

[0005]

Configuration of the Invention

[0006]

According to a first aspect of the present invention, there is provided a wiper device having a wiper motor having an output shaft reciprocatingly rotated by energization, and a drive coupled to the output shaft of the wiper motor and reciprocally rotating together with the output shaft. An arm, a non-rotatable gear member disposed coaxially around the output shaft of the wiper motor, a first rotating body rotatably supported by the drive arm and meshed with the gear member, and rotatable by the drive arm A second rotating body supported by and meshed with the first rotating body;
A wiper arm fixed to the second rotating body and a wiper blade attached to the wiper arm and wiping between two inverted positions of the windscreen are provided.

In the wiper device according to a second aspect of the present invention, in addition to the configuration of the first aspect, the ratio of the number of teeth of the gear member to the number of teeth of the second rotating body is selected to be 3 to 2. It is characterized by having a configuration that is

In the wiper device according to a third aspect of the present invention, in addition to the configuration of the second aspect, the drive arm and the wiper arm are arranged in a straight line at the center of the wiping range between the two reverse positions. It is characterized by having.

In the wiper device according to a fourth aspect of the present invention, in addition to the configuration of the third aspect, the drive arm and the wiper arm overlap with each other at the center of the wiping range between the two reversing positions and are arranged on a straight line. It is characterized by having a configuration that is

In the wiper device according to a fifth aspect of the present invention, in addition to the configuration of the third aspect, the drive arm and the wiper arm are arranged in a straight line without overlapping at the center portion of the wiping range between the two reverse positions. It is characterized by having been configured.

In a wiper device according to a sixth aspect of the present invention, in addition to the structure of the first aspect, the gear member is rotatably supported by the output shaft of the wiper motor and the gear member main body meshing with the first rotating body. An output shaft insertion portion formed integrally with the first rotating body, the first rotating body includes a first rotating body that meshes with the gear member and the second rotating body, and a rotating body rotatably supported by the drive arm. An axis is formed, and the second rotating body includes:
A second rotating body main body meshing with the first rotating body and a pivot shaft rotatably supported by the drive arm and fixed to the wiper arm are integrally formed.

In a wiper device according to a seventh aspect of the present invention, in addition to the configuration of the first or sixth aspect, the drive arm further comprises:
An output shaft coupling portion coupled to the output shaft of the wiper motor, a first rotating member supporting portion rotatably supporting the rotating member shaft of the first rotating member, and a pivot shaft of the second rotating member being rotatable; It is characterized in that it has a configuration in which a second rotating body supporting portion for supporting is formed.

According to an eighth aspect of the present invention, in addition to the configuration of the second aspect, in addition to the configuration of the second aspect, the second rotating body is arranged above the gear member at the two reverse positions. I have.

A wiper device according to a ninth aspect of the present invention is characterized in that, in addition to the configuration of the second aspect, the second rotating body is arranged below the gear member at two reversing positions. I have.

In a wiper device according to a tenth aspect of the present invention, the wiper motor, a drive arm driven by the output shaft of the wiper motor and reciprocatingly rotated, and coaxially disposed surrounding the output shaft of the wiper motor, are non-rotatable. A gear member, a first rotating body rotatably supported by the drive arm and meshed with the gear member, and a tooth having the number of teeth of 2/3 of the number of teeth of the gear member are rotatably supported by the drive arm. A second rotator engaged with the first rotator, a wiper arm fixed to the second rotator, and a wiper mounted on the wiper arm and wiping between two inverted positions of the windscreen. It is characterized by having a configuration provided with a blade.

In the wiper device according to an eleventh aspect of the present invention, in addition to the configuration of the tenth aspect, the drive arm and the wiper arm are arranged in a straight line at the center of the wiping range between the two reversing positions. It is characterized by having.

In a wiper device according to a twelfth aspect of the present invention, in addition to the structure of the eleventh aspect, the drive arm and the wiper arm overlap and are arranged on a straight line at the center of the wiping range between the two reverse positions. It is characterized in that it has a configuration.

In the wiper device according to a thirteenth aspect of the present invention, in addition to the structure of the eleventh aspect, the drive arm and the wiper arm are arranged in a straight line without overlapping at the center of the wiping range between the two reversing positions. It is characterized by having been configured.

In the wiper device according to a fourteenth aspect of the present invention, in addition to the configuration of the tenth aspect, the gear member is rotatably supported by the output shaft of the wiper motor and a gear member main body that meshes with the first rotating body. An output shaft insertion portion formed integrally with the first rotating body, the first rotating body includes a first rotating body that meshes with the gear member and the second rotating body, and a rotating body rotatably supported by the drive arm. A shaft is formed, and the second rotator integrally includes a second rotator main body that meshes with the first rotator, and a pivot shaft rotatably supported by the drive arm and fixed to the wiper arm. It is characterized by having been formed in the structure.

In a wiper device according to a fifteenth aspect of the present invention, in addition to the configuration of the tenth or fourteenth aspect, the drive arm further includes an output shaft coupling portion coupled to an output shaft of the wiper motor, and a first rotating body. First for rotatably supporting a rotating body shaft
, And a second rotating body supporting portion that rotatably supports the pivot shaft of the second rotating body.

A wiper device according to a sixteenth aspect of the present invention is characterized in that, in addition to the configuration of the tenth aspect, the second rotating body is arranged above the gear member at two reversal positions. I have.

A wiper device according to a seventeenth aspect of the present invention is characterized in that, in addition to the configuration of the tenth aspect, the second rotating body is arranged below the gear member at the two reverse positions. I have.

[0023]

The first, second, third, fourth and fifth aspects of the present invention are described below.
6, 7, 8, 9, 10, 11, 12, 13, 14, 1
In the wiper devices according to 5, 16, and 17, when the output shaft is reciprocated by energizing the wiper motor, the drive arm is reciprocated. Then, by the reciprocating rotation of the drive arm, the first rotating body revolves with respect to the gear member, and the second rotating body also revolves with respect to the gear member, and the wiper arm reciprocates and swings with the second rotating body. The wiper blade wipes the windscreen by the reciprocating swing of the wiper arm. At this time, when the position of the drive arm in which the second rotating body is disposed above the gear member is selected as the reversal position of the wiper blade, the upper left and right sides of the laterally long windscreen are not wiped off with the wiper blade. When the position of the drive arm, which is wiped off and, in contrast, the gear member is located at the top of the second rotating body, is selected as the reversal position of the wiper blade, the central upper part of the longitudinally long windscreen is Is wiped off by the wiper blade without leaving any wiping.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION

[0025]

1 to 11 show a first embodiment of a wiper device according to the present invention.

The illustrated wiper device 1 includes a wiper motor 2, a drive arm 3, a gear member 4, a first rotating body 5,
, A wiper arm 7 and a wiper blade 8.

The wiper motor 2 has an output shaft 2a and is electrically connected to a wiper control circuit. When the wiper switch provided in the wiper control circuit is switched to the low-speed mode, the output shaft 2a is reciprocated at low speed, and when the wiper switch is switched to the high-speed mode, the output shaft 2a is reciprocated at high speed, and the wiper is rotated. When the switch is switched to the intermittent mode, the output shaft 2a is reciprocated after an intermittent pause. As shown in FIG. 4, a serration 2a1 and a screw 2a2 are formed at the tip of the output shaft 2a.

The drive arm 3 comprises an upper arm 3a and a lower arm 3b.

As shown in FIGS. 2 and 3, the upper arm portion 3a is provided with an upper arm portion main body 3a1 formed in an oval plate shape. Upper arm part main body 3a1
In the substantially central portion of the first rotary member supporting portion 3a2,
Are formed. In the first rotating body support portion 3a2,
A first bearing 9 is mounted.

The upper arm portion 3a has a round hole-shaped output shaft coupling portion 3a on one side of the first rotating body support portion 3a2.
3 are formed. A serration 2a1 formed on the output shaft 2a of the wiper motor 2 is fitted into the output shaft coupling 3a3.

In the upper arm 3a, a pivot shaft support 3a4 having a round hole shape is formed on the other side of the first rotating body support 3a2. This pivot shaft support 3a
The second bearing 10 is mounted in the inside 4.

The lower arm portion 3b is provided with an oval plate-shaped lower arm portion main body 3b1. At a substantially central portion of the lower arm portion main body 3b1, a pair of first rotator support portions 3b2 are formed in the first rotator support portion 3a2 of the round arm shape and the upper arm portion 3a. A third bearing 11 is mounted in the first rotating body support 3b2.

The lower arm portion 3b has a round hole-shaped output shaft insertion portion 3b3 on one side of the first rotating body support portion 3b2.
Are formed. The output shaft 2a of the wiper motor 2 is inserted through the output shaft insertion portion 3b3.

In the lower arm 3b, a pair of pivot shaft supports 3b4 are formed on the other side of the first rotating body support 3b2 and in the pivot shaft support 3a4 of the upper arm 3a. I have. A fourth bearing 12 is mounted in the pivot shaft support 3b4.

The drive arm 3 includes an upper arm unit main body 3
a1, the rotating body accommodating portion 3 between the lower arm portion main body 3b1
c is formed. The gear member 4, the first rotator 5, and the second rotator 6 are accommodated in the rotator housing 3c.

The drive arm 3 is, as shown in FIG.
The gear member 4 is disposed below the second rotator 6, and the second rotator 6 is connected to a drive arm line α connecting the center of the gear member 4 and the center of the second rotator 6. Position A1 at which the wiper arm line β connecting the center of the pivot shaft 6b of FIG.
As shown in FIG. 11, the gear member 4 is disposed below the second rotating body 6, and the wiper arm line β is approximately 95 degrees at right angles to the drive arm line α. And reciprocate between the positions A5.

The gear member 4 is provided with a gear member main body 4a having a disk shape. A spur gear tooth portion 4a1 is formed on the outer peripheral portion of the gear member main body 4a. On the outer peripheral portion of the gear member main body 4a, a foot 4b continuous with the gear member main body 4a is formed. Gear member main body 4a, foot 4b
Is formed with a round hole output shaft insertion portion 4c. The foot portion 4b is provided with the output shaft insertion portion 3b of the lower arm portion 3b.
3 is inserted. A fifth bearing 13 is mounted in the output shaft insertion portion 4c. The fifth bearing 13 is inserted through the output shaft 2a of the wiper motor 2. Gear member 4
Is the output shaft 2a of the wiper motor 2 by the fifth bearing 13.
Is rotatably supported. The foot 4b of the gear member 4
It is integrally fitted to a gear member support portion 2b1 formed on the gear case 2b, and is prevented from coming off by a pin 2b2.

The output shaft 2a of the wiper motor 2 inserted into the gear member 4 has a screw portion 2a2 protruding outside the upper arm portion 3a. Nut 1 on screw 2a2
The drive arm 3 is integrally connected to the output shaft 2 a of the wiper motor 2 by screwing the 4.

The first rotating body 5 has a disc-shaped first rotating body.
Rotator main body 5a is provided. A spur gear tooth portion 5a1 is formed on the outer peripheral portion of the first rotating body 5a. A rotating body shaft 5b is provided at the center of the first rotating body 5a.
Are integrally formed. The gear member 5 includes a rotating body shaft 5
One end of “b” is inserted into the first bearing 9 of the upper arm 3a. The other end of the rotating member shaft 5b of the gear member 5 is inserted into the third bearing 11 of the lower arm 3b. The first rotating body 5 is rotatably supported by the upper arm 3a and the lower arm 3b. The first rotating body 5 is configured such that the tooth portion 5a1 is the first tooth portion 4a of the gear member 4.
1 is engaged.

Since the first rotating body 5 is rotatably supported by the driving arm 3, the driving arm 3 reciprocates between the position A1 in FIG. 7 and the position A5 in FIG. By revolving with respect to the gear member 4 in accordance with
Has the function of transmitting the rotational power to the rotating body 6 of the rotary shaft.

The second rotating body 6 has a disc-shaped second
Rotator main body 6a is provided. A spur gear tooth portion 6a1 is formed on the outer peripheral portion of the second rotating body 6a. A pivot shaft 6 is provided at the center of the second rotating body 6a.
b is formed integrally. The base end of the pivot shaft 6b is integrated with the second rotating body 6a. As shown in FIG. 4, a serration portion 6b1 and a screw portion 6b2 are formed at the tip of the pivot shaft 6b.

In the second rotating body 6, one end of the pivot shaft 6b is inserted into the second bearing 10 of the upper arm 3a, and the other end of the pivot shaft 6b is connected to the fourth arm of the lower arm 3b.
The upper arm 3
a and rotatably supported by the lower arm 3b,
The third tooth portion 6a1 is the second tooth portion 5a1 of the first rotating body 5.
Are engaged.

The tip of the pivot shaft 6b of the second rotating body 6 is arranged so as to protrude above the upper arm 3a.
Wiper arm 7 on serration 6b1 and screw 6b2
Is fixed.

Since the second rotating body 6 is rotatably supported by the driving arm 3, the driving arm 3 reciprocates between the position A1 in FIG. 7 and the position A5 in FIG. Accordingly, the wiper arm 7 is reciprocated by the rotational power given from the first rotating body 5 to move the wiper arm 7 fixed to the pivot shaft 6b on the wind screen 60 to the first reversal position B1 of the wiper blade 8 and the second position. It has a function of reciprocatingly rotating in a trilobal pattern between the two reverse positions B5.

The wiper arm 7 has an arm head 7a,
A retainer 7b and an arm piece 7c are provided, respectively.

The arm head 7a is provided with an arm head body 7a1 having a rectangular rod shape. A pivot shaft fixing portion 7a2 is provided at the base end of the arm head body 7a1.
Are formed. As shown in FIG.
Nut insertion hole 7a3, serration receiving portion 7a shown in FIG.
4 are formed respectively. Pivot shaft fixing part 7a2
The serration receiving portion 7a4 is fitted to the serration portion 6b1 of the pivot shaft 6b of the second rotating body 6.
When the nut 15 is screwed into the screw portion 6b2 of the pivot shaft 6b disposed in the nut insertion hole 7a3, the pivot shaft fixing portion 7a2 is moved to the pivot shaft 6b.
It is fixed to.

Further, a retainer connecting portion 7a5 is formed at the tip of the arm head main body 7a1. The base end of the retainer 7b is rotatably connected to the retainer connecting portion 7a5.

The base end of the arm piece 7c is fixed to the distal end of the retainer 7b by riveting.
A wiper blade 8 is attached to the tip of the arm piece 7c. Since the arm springs (not shown) are locked at the base end of the arm piece 7c and the tip end of the arm head 7a, the wiper blade 8 is moved by the arm springs by the wind screen 60.
Pressed to.

In such a wiper device 1, when the output shaft 2a of the wiper motor 2 is not rotated reciprocally but is rotated, it is given as a trilobal trochoid curve shown in FIGS. Wiping pattern characteristics can be provided. In the first embodiment, the upper half of the wiping pattern is used. That is, as shown in FIG. 7, the drive arm in which the gear member 4 is disposed below the second rotating body 6 and the wiper arm line β is about 95 degrees to the left with respect to the drive arm line α. 3 is selected as the first reversal position B1 of the wiper blade 8, and FIG.
As shown in FIG. 1, the position of the drive arm 3 in which the gear member 4 is disposed below the second rotating body 6 and the wiper arm line β is approximately 95 degrees to the right with respect to the drive arm line α. Since A5 is selected as the second reversing position B5 of the wiper blade 8, it is used for a vehicle having a windscreen 60 that is long in the lateral direction.

In such a wiper device 1, when the wiper switch provided in the wiper control circuit is in the stop mode, the drive arm 3 is at the position A1 and the wiper blade 8
At the first reversal position B1.

When the output shaft 2a of the wiper motor 2 starts rotating at a low speed in the counterclockwise direction in FIG. 7 by switching the wiper switch provided in the wiper control circuit to the low speed mode, the drive arm 3 also moves in FIG. In order to start rotating counterclockwise at a low speed, the first rotating body 5 starts revolving counterclockwise in FIG. 7 with respect to the center of the gear member 4, and the second rotating body 6 The wiper blade 8 starts rotating forward in the clockwise direction at a low speed on the wind screen 60 away from the first reversing position B1.

When the output shaft 2a of the wiper motor 2 continues to rotate counterclockwise in FIG. 7, the drive arm 3 rotates from position A1 to position A2 in the counterclockwise direction as shown in FIG. Since the first rotating body 5 is revolved counterclockwise and the second rotating body 6 is rotated clockwise, the wiper blade 8 is moved forward on the wind screen 60 to the position B2 at a low speed in the clockwise direction. You. At this time, the wiper blade 8
Wipes the upper left side area 60a of the windscreen 60 with the drive arm 3 at the position A2 without leaving any wiping.

When the output shaft 2a of the wiper motor 2 continues to rotate counterclockwise in FIG. 8, the drive arm 3 is rotated counterclockwise from position A2 to position A3 as shown in FIG. Since the first rotating body 5 revolves counterclockwise and the second rotating body 6 is rotated clockwise, the wiper blade 8 is moved clockwise at a low speed to the position B3 on the wind screen 60. You. At this time, the drive arm 3 and the wiper arm 7 overlap and are arranged on a straight line.

When the output shaft 2a of the wiper motor 2 continues to rotate in the counterclockwise direction in FIG. 9, the drive arm 3 moves from the position A3 to the position A4 in the counterclockwise direction as shown in FIG.
, The first rotating body 5 revolves counterclockwise and the second rotating body 6 rotates clockwise, so that the wiper blade 8 moves clockwise on the windscreen 60 to the position B4. The wiping is performed at a low speed. At this time, the wiper blade 8 wipes the upper right side area 60b of the windscreen 60 with the drive arm 3 at the position A4 without leaving any wiping.

When the output shaft 2a of the wiper motor 2 continues to rotate counterclockwise in FIG. 10, the drive arm 3 rotates from position A4 to position A5 in the counterclockwise direction as shown in FIG. Then, the first rotating body 5 revolves counterclockwise and the second rotating body 6 rotates clockwise, so that the wiper blade 8 moves clockwise on the windscreen 60 to the second reversing position B5. At a low speed.

When the wiper blade 8 reaches the second reversal position B5, the wiper motor 2
11, the output shaft 2a of the wiper motor 2 starts rotating clockwise at a low speed in FIG. 11, the drive arm 3 starts rotating clockwise at a low speed in FIG. 11 starts revolving clockwise in FIG. 11, the second rotating body 6 is rotated clockwise in FIG. The wiping motion starts at a low speed.

When the output shaft 2a of the wiper motor 2 continues to rotate clockwise in FIG. 11, the drive arm 3 is rotated clockwise from position A5 to position A4 as shown in FIG. Since the rotating body 5 is revolved clockwise and the second rotating body 6 is rotated counterclockwise, the wiper blade 8 is moved backward on the wind screen 60 to the position B4 in the counterclockwise direction at a low speed. . At this time, the wiper blade 8 wipes the upper right side area 60b of the windscreen 60 with the drive arm 3 at the position A4 without leaving any wiping.

When the output shaft 2a of the wiper motor 2 continues to rotate clockwise in FIG. 10, the drive arm 3 is rotated clockwise from position A4 to position A3 as shown in FIG. Since the rotating body 5 revolves clockwise and the second rotating body 6 rotates counterclockwise, the wiper blade 8
Is moved counterclockwise on the wind screen 60 to the position B3 at a low speed.

When the output shaft 2a of the wiper motor 2 continues to rotate clockwise in FIG. 9, as shown in FIG.
The drive arm 3 is rotated clockwise from the position A3 to the position A2, the first rotating body 5 is revolved clockwise, and the second rotating body 6 is rotated counterclockwise. Is moved counterclockwise at a low speed on the wind screen 60 to the position B2. At this time, the wiper blade 8 wipes the upper left side area 60a of the windscreen 60 with the drive arm 3 at the position A2 without leaving any wiping.

When the output shaft 2a of the wiper motor 2 continues to rotate clockwise in FIG. 8, the drive arm 3 moves clockwise from position A2 to position A as shown in FIG.
1, the first rotating body 5 is revolved clockwise and the second rotating body 6 is rotated counterclockwise, so that the wiper blade 8 moves on the wind screen 60 to the first reversing position. The wiping and returning operation is performed at a low speed in the counterclockwise direction until B1.

When the wiper blade 8 reaches the first reversing position B1, the wiper motor 2
7, the output shaft 2a of the wiper motor 2 starts to rotate counterclockwise at a low speed in FIG. 7 and the above operation is repeated while the wiper switch is switched to the low speed mode. When the wiper switch is switched to the stop mode while the wiper blade 8 is in the middle of the wiping operation, the wiper fixed position stop circuit built in the wiper motor 2 is operated, and the wiper blade 8
Is supplied from the wiper control circuit to the wiper motor 2 until the wiper motor 8 reaches the first reverse position B1, and the power supply to the wiper motor 2 is cut off when the wiper blade 8 reaches the first reverse position B1. Then, the wiper blade 8 stops at the first reversing position B1.

As described above, in the wiper device 1, the gear member 4 is disposed below the second rotating body 6, and
The wiper arm line β is about 9 to the left with respect to the drive arm line α.
The position A1 of the drive arm 3 shown in FIG. 7 which is 5 degrees is selected as the first reversing position B1 of the wiper blade 8, the gear member 4 is disposed below the second rotating body 6, and Wiper arm line β is about 95 to the right side with respect to arm line α.
Since the position A5 of the drive arm 3 shown in FIG. 11 is selected as the second reversing position B5 of the wiper blade 8, the upper left side area 60a and the upper right side of the windscreen 60, which is long in the lateral direction, are selected. The side area 60b is wiped without leaving any wiping.

FIGS. 12 to 17 show a second embodiment of the wiper device according to the present invention.

In this wiper device 1, the components are the same as in the first embodiment, and the method of selecting the first and second reversing positions of the wiper blade 8 corresponding to the movement of the drive arm 3 is different. That is, in the second embodiment, the lower half of the wiping pattern characteristic shown in FIGS. 5 and 6 is used.

As shown in FIG. 13, the drive arm 3 has the gear member 4 disposed above the second rotating body 6 and the center of the gear member 4 and the center of the second rotating body 6. A position C at which the wiper arm line β connecting the center of the pivot shaft 6b of the second rotating body 6 and the center of the wiper arm 7 forms an acute angle of about 45 degrees to the left with respect to the drive arm line α connecting
17, the gear member 4 is disposed below the second rotating body 6, and the wiper arm line β is at an acute angle of about 45 degrees with respect to the drive arm line α to the right. And reciprocate between the positions C5.

In the wiper device 1, as shown in FIG. 13, the gear member 4 is disposed below the second rotating body 6, and the wiper arm line β is moved leftward with respect to the drive arm line α. Position C of the drive arm 3 which is about 45 degrees to the side
1 is selected as the first reversal position D1 of the wiper blade 8,
As shown in FIG. 17, the gear member 4 is
The drive arm 3 is disposed below the drive arm 3 and the wiper arm line β is approximately 45 degrees to the right side with respect to the drive arm line α.
Is selected as the second reversing position D2 of the wiper blade 8 and is used for a vehicle having a windscreen 60 that is long in the vertical direction.

When the output shaft 2a of the wiper motor 2 starts rotating at a low speed in the counterclockwise direction in FIG. 13 by switching the wiper switch provided in the wiper control circuit to the low speed mode, the drive arm 3 also moves in FIG. To start rotating counterclockwise at a low speed, the first rotating body 5 starts revolving counterclockwise in FIG. 13, the second rotating body 6 is rotated clockwise in FIG. Starts moving forward at a low speed in the clockwise direction on the wind screen 60 away from the first reversing position D1.

When the output shaft 2a of the wiper motor 2 continues to rotate counterclockwise in FIG. 13, as shown in FIG.
The drive arm 3 is rotated counterclockwise from the position C1 to the position C2, the first rotating body 5 is revolved counterclockwise, and the second rotating body 6 is rotated clockwise. 8 is moved in the clockwise direction at a low speed on the wind screen 60 to the position D2.

When the output shaft 2a of the wiper motor 2 continues to rotate counterclockwise in FIG. 14, as shown in FIG.
The drive arm 3 is rotated counterclockwise from the position C2 to the position C3, the first rotating body 5 is revolved counterclockwise, and the second rotating body 6 is rotated clockwise. 8 is moved in the clockwise direction at low speed to the position D3 on the wind screen 60. At this time, the wiper blade 8 is moved to the center upper area 60c above the center of the windscreen 60 by the drive arm 3 at the position C3.
Wipe without leaving. At this time, the drive arm 3 and the wiper arm 7 are arranged on a straight line without overlapping.

When the output shaft 2a of the wiper motor 2 continues to rotate counterclockwise in FIG. 15, the drive arm 3 moves from the position C3 to the position C in the counterclockwise direction as shown in FIG.
4, the first rotating body 5 revolves counterclockwise and the second rotating body 6 rotates clockwise, so that the wiper blade 8 moves clockwise on the windscreen 60 to the position D4. At a low speed.

When the output shaft 2a of the wiper motor 2 further rotates counterclockwise in FIG. 16, the drive arm 3 rotates from position C4 to position C5 counterclockwise as shown in FIG. Then, the first rotating body 5 revolves counterclockwise and the second rotating body 6 rotates clockwise, so that the wiper blade 8 moves clockwise on the windscreen 60 to the second reversing position D5. At a low speed.

When the wiper blade 8 reaches the second reversal position D5, the wiper control circuit
17, the output shaft 2a of the wiper motor 2 starts rotating clockwise at a low speed in FIG. 17, the drive arm 3 starts rotating clockwise at a low speed in FIG. 17 starts revolving clockwise in FIG. 17, the second rotating body 6 is rotated counterclockwise in FIG. 17, and the wiper blade 8 moves away from the second reversing position D5 and moves counterclockwise on the windscreen 60. Start wiping back at low speed in the direction.

When the output shaft 2a of the wiper motor 2 continues to rotate clockwise in FIG. 17, the drive arm 3 is rotated counterclockwise from position C5 to position C4 as shown in FIG. Is rotated clockwise, and the second rotating body 6 is rotated counterclockwise, so that the wiper blade 8 is wiped backward on the wind screen 60 to the position D4 at a low speed in the counterclockwise direction. You.

When the output shaft 2a of the wiper motor 2 continues to rotate clockwise in FIG. 16, the drive arm 3 is rotated clockwise from position C4 to position C3 as shown in FIG. Since the rotating body 5 is revolved clockwise and the second rotating body 6 is rotated counterclockwise, the wiper blade 8 is wiped backward on the wind screen 60 to the position D3 at a low speed in the counterclockwise direction. . At this time, the wiper blade 8 wipes the center upper area 60c above the center of the windscreen 60 without leaving the drive arm 3 at the position C3.

When the output shaft 2a of the wiper motor 2 continues to rotate clockwise in FIG. 15, the drive arm 3 is rotated clockwise from position C3 to position C2 as shown in FIG. Is rotated in the clockwise direction, and the second rotating body 6 is rotated in the counterclockwise direction, so that the wiper blade 8 is wiped and moved at a low speed in the counterclockwise direction on the wind screen 60 to the position D2. You.

When the output shaft 2a of the wiper motor 2 continues to rotate clockwise in FIG. 14, the drive arm 3 is rotated clockwise from position C2 to position C1, as shown in FIG. Since the first rotating body 5 revolves clockwise and the second rotating body 6 rotates counterclockwise,
The wiper blade 8 is moved backward on the wind screen 60 at a low speed counterclockwise to the first reversal position D1.

When the wiper blade 8 reaches the first reversing position D1, the wiper control circuit
13, the output shaft 2a of the wiper motor 2 starts rotating counterclockwise at a low speed in FIG.
While the wiper switch is in the low speed mode,
The above operation is repeatedly performed. When the wiper switch is switched to the stop mode while the wiper blade 8 is in the middle of the wiping operation, the wiper fixed position stop circuit built in the wiper motor 2 is operated, and the wiper blade 8 is moved to the first reverse position. The power supply to the wiper motor 2 is continued from the wiper control circuit until the wiper motor 8 reaches the first reverse position D1, and the power supply to the wiper motor 2 is cut off when the wiper blade 8 reaches the first reversal position D1. It stops at the inversion position D1 of 1.

As described above, the wiper device 1 in this case is used.
13, the gear member 4 is disposed above the second rotating body 6, and the position of the drive arm 3 shown in FIG. 13 is such that the wiper arm line β is about 45 degrees to the left with respect to the drive arm line α. C1 is selected as the first reversing position D1 of the wiper blade 8, the gear member 4 is disposed above the second rotating body 6, and the wiper arm line β is approximately rightward with respect to the drive arm line α. Since the position C5 of the drive arm 3 shown in FIG. 17 at 45 degrees is selected as the second reversal position D5 of the wiper blade 8, the windscreen 60 which is long in the vertical direction is used.
Of the center upper area 60c above the center of the area without wiping.

In the description of the operation of the first and second embodiments,
The operation was performed only when the wiper switch was switched to the low-speed mode. However, when the wiper switch was switched to the high-speed mode, the output shaft 2a of the wiper motor 2 was reciprocated at a high speed. In this case, the output shaft 2a of the wiper motor 2 is reciprocally rotated intermittently with an intermittent pause, and the same wiping operation as described above is performed by the wiper blade 8.

[0080]

As described above, according to the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, and first aspects of the present invention.
According to the wiper devices of 1, 12, 13, 14, 15, 16, and 17, when the output shaft is reciprocated by the power supplied to the wiper motor, the drive arm is reciprocated. Then, by the reciprocating rotation of the drive arm, the first rotating body revolves with respect to the gear member, and the second rotating body also revolves with respect to the gear member, and the wiper arm reciprocates and swings with the second rotating body. The wiper blade wipes the windscreen by the reciprocating swing of the wiper arm. At this time, when the position of the drive arm in which the second rotating body is disposed above the gear member is selected as the reverse position of the wiper blade,
The upper left and right sides of the windscreen, which is long in the lateral direction, are wiped with a wiper blade without leaving any wiping, and in contrast to this, the position of the drive arm in which the gear member is located at the top of the second rotating body is the wiper blade. Is selected, the upper portion at the center of the windscreen, which is long in the vertical direction, is wiped with the wiper blade without leaving any wiping. Therefore, as compared with the conventional one using the link mechanism, an excellent effect that the wiping operation can be performed without leaving any wiping operation on a horizontally long windscreen or a vertically long windscreen with an extremely simple structure. Play.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of a wiper device according to the present invention.

FIG. 2 is an external perspective view illustrating an assembling relationship of components of the wiper device illustrated in FIG. 1 as viewed from obliquely above.

FIG. 3 is an external perspective view illustrating an assembling relationship of components of the wiper device shown in FIG. 1 as viewed obliquely from below.

4 is a sectional view of main parts of the wiper device shown in FIG.

FIG. 5 is a relationship diagram of a set position of a drive arm and a wiper arm in the wiper device shown in FIG.

FIG. 6 is a characteristic diagram of a wiping locus in the wiper device shown in FIG. 1;

FIG. 7 is an operation explanatory view of the wiper device shown in FIG. 1;

FIG. 8 is an operation explanatory view of the wiper device shown in FIG. 1;

FIG. 9 is an operation explanatory view of the wiper device shown in FIG. 1;

FIG. 10 is an operation explanatory view of the wiper device shown in FIG. 1;

FIG. 11 is an operation explanatory view of the wiper device shown in FIG. 1;

FIG. 12 is a front view of a second embodiment of the wiper device according to the present invention.

FIG. 13 is an operation explanatory view of the wiper device shown in FIG.

FIG. 14 is an operation explanatory diagram of the wiper device shown in FIG.

15 is an operation explanatory view of the wiper device shown in FIG.

FIG. 16 is an operation explanatory view of the wiper device shown in FIG. 12;

17 is an operation explanatory view of the wiper device shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 wiper device 2 wiper motor 2a output shaft 3 drive arm 3a2 second rotating body support 3a3 output shaft coupling 3a4 (third rotating body support) pivot shaft support 3b2 second rotating body support 3b4 (third Rotating member supporting portion) Pivot shaft supporting portion 4 Gear member 4a Gear member main body 4c Output shaft insertion portion 5 First rotating member 5a First rotating member main body 5b Rotating member shaft 6 Second rotating member 6a Second rotation Body 6b Pivot shaft 7 Wiper arm 8 Wiper blade 60 Windscreen

Claims (17)

[Claims] 1. A wiper motor having an output shaft reciprocatingly rotated by energization, a drive arm coupled to the output shaft of the wiper motor, and reciprocally rotating together with the output shaft; and a coaxial arrangement surrounding the output shaft of the wiper motor. A non-rotatable gear member, a first rotating body rotatably supported by the drive arm and meshed with the gear member, and a first rotating body rotatably supported by the drive arm. A wiper arm fixed to the second rotary body, and a wiper blade attached to the wiper arm and wiping between two reverse positions of the windscreen. A wiper device characterized in that: 2. The wiper device according to claim 1, wherein the number of teeth of the gear member and the number of teeth of the second rotating body are selected at a ratio of 3 to 2. 3. The wiper device according to claim 2, wherein the drive arm and the wiper arm are arranged in a straight line at a central portion of the wiping range between the two reverse positions. 4. The wiper device according to claim 3, wherein the drive arm and the wiper arm overlap and are arranged in a straight line at the center of the wiping range between the two reverse positions. 5. The wiper device according to claim 3, wherein the drive arm and the wiper arm are arranged in a straight line without overlapping at a central portion of the wiping range between the two reverse positions. 6. The gear member is formed integrally with a gear member main body meshing with the first rotating body and an output shaft insertion portion rotatably supported on an output shaft of the wiper motor. A first rotator main body that meshes with the gear member and the second rotator, and a rotator shaft that is rotatably supported by the drive arm. The second rotator has a first rotator body. The wiper according to claim 1, wherein a second rotating body main body meshing with the rotating body and a pivot shaft rotatably supported by the drive arm and fixed to the wiper arm are integrally formed. apparatus. 7. A drive arm, comprising: an output shaft coupling portion coupled to an output shaft of a wiper motor; a first rotator support portion rotatably supporting a rotator shaft of a first rotator; The wiper device according to claim 1 or 6, further comprising a second rotating body support portion that rotatably supports the pivot shaft of the rotating body. 8. The wiper device according to claim 2, wherein the second rotating body is disposed above the gear member at the two reverse positions. 9. The wiper device according to claim 2, wherein the second rotating body is disposed below the gear member at the two reverse positions. 10. A wiper motor, a drive arm driven by an output shaft of the wiper motor and reciprocatingly rotated, a coaxially disposed gear member surrounding the output shaft of the wiper motor, and a non-rotatable gear member; A first rotating body rotatably supported and meshed with the gear member; and a second rotating body having two-thirds of the number of teeth of the gear member. The first rotating body is rotatably supported by the drive arm. A second rotating body meshed with the first rotating body; a wiper arm fixed to the second rotating body; and a wiper blade mounted on the wiper arm and wiping between two inverted positions of the windscreen. A wiper device comprising: 11. The wiper device according to claim 10, wherein the drive arm and the wiper arm are arranged in a straight line at a central portion of the wiping range between the two reverse positions. 12. The wiper device according to claim 11, wherein the drive arm and the wiper arm overlap and are arranged in a straight line at a central portion of the wiping range between the two reverse positions. 13. The drive arm and the wiper arm are arranged in a straight line without overlapping at the center of the wiping range between the two reversing positions.
A wiper device according to item 1. 14. The gear member, wherein a gear member main body that meshes with the first rotating body and an output shaft insertion portion rotatably supported on the output shaft of the wiper motor are integrally formed. A first rotator main body that meshes with the gear member and the second rotator, and a rotator shaft that is rotatably supported by the drive arm. The second rotator has a first rotator body. The wiper according to claim 10, wherein a second rotating body main body meshing with the rotating body and a pivot shaft rotatably supported by the drive arm and fixed to the wiper arm are integrally formed. apparatus. An output shaft coupling portion coupled to an output shaft of the wiper motor; a first rotator support portion rotatably supporting a rotator shaft of the first rotator; 11. A second rotating body supporting portion for rotatably supporting a pivot shaft of the rotating body is formed.
Or the wiper device according to 14. 16. The wiper device according to claim 10, wherein the second rotating body is disposed above the gear member at the two reverse positions. 17. The wiper device according to claim 10, wherein the second rotating body is disposed below the gear member at the two reverse positions.