JPH01317854A - Wiper device for vehicle - Google Patents

Abstract

PURPOSE:To prevent the breakdown of a device by a snow damage by linking the connection rod subjected to reciprocating moving via a clamp arm by the operation of a wiper motor and the turning lever turning with a wiper arm so that the combined positional relation may be moved with moderation. CONSTITUTION:The tip part of the connection rod 12 reciprocated via a clamp arm by the rotation of a wiper motor is linked to the tip side of a turning lever 13 and the wiper arm(not shown in the figure) whose base end is fixed to a pivot shaft 10 is subjected to rocking movement by the rocking movement of the turning lever 13 around the shaft center of the pivot shaft 10. In this case, the support 15 consisting of the elastic body having an oblong hole 15a in the shape of two circular engaging holes being superposed at the center part is incorporated to the turning lever 13 and the tip end part of the connection rod 12 is combined with the connection pin 16 fitted to one part of the fitting hole of the oblong hole 15a. The center part of the support 15 is bent only at the time when a load is applied on the connection pin 16, which is made to move to the other part of the fitting hole with moderation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wiper device for a vehicle, and more particularly to a wiper device having a wiping angle switching function for protecting the wiper device from snow damage.

"Prior art and its problems J" A conventional wiper device having a wiping angle switching function includes a wiper device disclosed in Japanese Utility Model Application No. 60-54655.The wiper device is rotated by a wiper motor. A crank arm, a crank pin fixed on the crank arm, an eccentric bushing having a central axis eccentric from the central axis of the crank pin and rotatably attached to the crank pin, and an eccentric bushing rotatably attached to the eccentric bushing. The wiper link rod includes a wiper link rod that reciprocates as the crank arm rotates, and a wiper blade connected to the wiper link rod, and is further integrated with the eccentric bushing so that it can rotate around the crankpin together with the eccentric bushing. The lever includes a slider that is connected to the eccentric bushing and is slidable substantially in the radial direction of the eccentric bushing. The wiper device was connected and fixed to the wiper link rod side or crank arm side.The wiper device was installed inside the cowl box, and a working hole was drilled at a predetermined position in the cowl box. The work hole was plugged with a rubber stopper.

However, in order to switch the wiping angle in a conventional wiper device, the user must stop the wiper blade in the downward inverted position, open the engine hood, remove the rubber stopper from the working hole, and move the slider to the wiper link rod side or A series of troublesome switching operations had to be performed using a screwdriver on the crank arm side.

Moreover, this switching work becomes extremely difficult in a snowstorm. Also, if snow accumulates in the wiper blade storage position,
Since the wiper blade hits the snow that has accumulated in the storage position before reaching the lower inverted position, it cannot be said to be perfect from the standpoint of protecting the strength of the wiper device.

``Problems to be Solved by the Invention'' The present invention was made to solve the above problems, and when snow accumulates in the wiper blade storage position, the wiping angle of the wiper blade is automatically switched, and the wiper device Our main challenge is to provide a wiper device that provides complete strength protection, and also provides a wiper device that can switch the wiping angle with a single touch by applying a strong tensile force to the wiper arm as necessary. The task is to do so.

"Means and operations for solving the problems" The configuration of the wiper device of the present invention for solving the above problems includes a connecting rod that is crank-coupled to a wiper motor and reciprocates;
a rotary lever that is coupled to the connecting rod and rotates; a first wiper arm that rotates together with the rotary lever;
A second wiper arm is provided which is rotated based on the reciprocating movement of a link rod coupled to the rotary lever, and the coupling position relationship between the rotary lever and the connecting rod and the link rod can be moved with moderation. It is characterized by comprising a means to do so.

According to the configuration of the invention, when a tensile force is applied to the link rod, the rotary lever rotates, and the coupling position between the rotary lever and the connecting rod moves, so that the rotation angle of the rotary lever is switched. . Then, the wiping angles of the first and second wiper blades that perform the wiping operation are switched based on the rotation of the rotation lever. The tensile force applied to the link rod may be a tensile force generated on the link rod by the second wiper blade hitting snow accumulated at the wiper blade storage position, or may be manually applied to the link rod. The magnitude of the tensile force for switching the wiping angle, which may be a tensile force, is set to be sufficiently larger than the tensile force generated in the link rod by a normal wiping operation.

Further, in a second configuration of the wiper device of the present invention, the rotary lever is coupled to the connecting rod via a connecting pin and a connecting member, and the connecting position of the connecting pin to the rotary lever can be moved with moderation. It is characterized by having been.

According to this second configuration, when the rotating lever receives rotational force due to the tensile force applied to the link rod, the connection position of the connecting pin with respect to the rotating lever is moved, so that the connection is made from the center of rotation of the rotating lever. Even if the distance to the center of the pin changes and the connecting rod reciprocates the same distance, the rotation angle of the rotation lever can be changed.

Furthermore, in a third configuration of the wiper device of the present invention, the connecting pin is centered at the connecting portion between the connecting rod and the crank arm when the rotary lever reaches the upper reversal position, and has the length of the connecting rod as a radius. The first and/or second wiper arm is positioned relative to the rotating lever so as to be on a circular trajectory, and the upper inverted position of the first and/or second wiper arm is before and after the connecting position of the connecting pin with respect to the rotating lever is moved. Characterized by not changing. According to this configuration, the first. Since the upper inverted position of the second wiper arm does not change and only the lower inverted position is switched, the strength of the wiper device can be reliably protected even if the switching angle of the rotary lever is small.

"First Embodiment" Next, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

As shown in FIG. 1, the windshield glass 1 is wiped by the wiper blade 3 in the wiper wiping range 2,
The wiping range 2A is wiped by the wiper blade 3A.

The wiper blade 3.3A is connected to the wiper arm 4, and when fully concealed such as in summer, the wiper blade 3.3A is in downward return dislocation ff6.
．． The wiping operation is performed from 6A to the upper inversion position 28.8A, and during semi-con shielding such as in winter, the wiping operation is similarly performed from the downward return displacement ff7, 7A to the upper inversion position 8.8A during semi-contained shielding. Bottom inversion position 6.6A when fully concealed
is located below the rear end #5 of the engine hood, and the lower reversal position 7.7A during semi-concealed is located above the rear end 5 of the hood. The area around the rear end portion 5 of the engine hood is grooved to accommodate the wiper blade 3.3A, and is therefore a place where snow accumulates during snowfall. Wiper blade 3, 3A
A mechanism for automatically switching between the lower inversion positions 6.6A, 7, and 7A is provided in the rotary lever 13. A connecting rod 12 is attached to the rotation center 9 of the wiper motor 90 via a crank arm 9a, and the rotational movement of the rotation center 9 of the wiper motor 90 is transmitted as rotational movement to the rotation lever 13 via this connecting rod 12. A wiper arm 4 is fixedly connected to a pivot shaft 10 on the passenger seat side that forms the center of rotation of the zero rotation lever 13 at a predetermined angle with the rotation lever 13, and is rotated via the wiper arm 4. Windshield glass 1 with wiper blade 3
The structure is designed to eliminate Driver seat side pivot shaft 11
The rotational movement of the rotational lever 13 is transmitted to the link rod 1'4 and the rotational lever 13A, and the wiping range 2A of the windshield glass 1 is wiped by the wiper blade 3A rotating together with the wiper arm 4A.

That is, when the wiper motor 90 operates, its rotation center 9 rotates, and the connecting rod 12 is reciprocated via the crank arm 9a, so that the rotation lever 13 is rotated about the pivot shaft 10.

Further, the rotational movement of the rotational lever 13 is transmitted to the rotational lever 13A via the link rod 14, and
is rotated around the pivot shaft 11. As shown in FIG. 1, during the closing operation when the crank arm 9a and the connecting rod 12 are aligned substantially in a straight line, the wiper blades 3,' 3A are in the lower inverted position 6.6 in summer.
A, and conversely, when the crank arm 9a rotates approximately 1809 times from the position shown in FIG.
Is the wiper blade 3.3A upside down? ! ! It reaches 8.8A. When snow accumulates around the rear end of the engine hood 5 in winter, this snow causes the wiper blades 3 and 3A to
Since the crank arm 9a and the connecting rod 12 are prevented from rotating, even if the crank arm 9a and the connecting rod 12 try to be aligned on a substantially straight line as shown in FIG. The mechanism of the invention utilizes the tensile force applied to the link rod 14 to cause the downward displacement M6, 6A of the wiper blade 3°3A to be upwardly displaced above the rear end portion 5 of the engine hood! 7.7A automatically.

The details of the mechanism of the first embodiment will be explained with reference to FIGS. 2 to 4. The link rod 14 is connected to the rotating lever 13 by a fixed pin 17 fixed to the rotating lever 13. The rotating lever 13 has a shape in which two circular engagement holes overlap in the center. A support 15 having a long hole 15a forming a shape is incorporated. In addition, support 15
has escape holes 15b on both sides of the central part of the elongated hole 15a.

A connecting pin 16 is engaged with one of the retaining holes of the elongated hole 15a of the support 15, and the connecting rod 1 is engaged with the connecting pin 16.
The zero rotation lever 13 to which 2 is connected is connected to the connecting rod 12
It is driven by and rotated around the pivot axis lO.

The support 15 is made of an elastic material such as a synthetic resin, and has a relief hole 15b, so that the central portion is bent only when a load is applied to the connecting pin 16, and the support 15 is made of an elastic material such as a synthetic resin. The connecting pin 16 is configured to be movable with moderation. When the direction connecting the centers of the two engaging holes of the elongated hole 15a is determined from the drawing in Fig. 3, when the rotating lever 13 is in the upper inverted position (open side), the two-dot chain line in Fig. 3 is found. As shown, it lies on the locus of a circle whose center is 0, which is the engagement portion between the connecting rod 12 and the crank arm 9a, and whose radius is the length RL of the connecting rod 12.

Further, the center of each of the two engagement holes of the elongated hole 15a is located at the intersection of the angle line of 1/2 of the switching angle Δθp of the rotary lever 13 and the circle with the aforementioned radius Rt.

According to FIG. 4 showing the A-A cross section of FIG.
6. The rotary lever 13 has an elongated hole 15.
A support 15 with a is incorporated. Long hole 15
A is an irregularly shaped elongated hole in which two engaging holes partially overlap in the center for engaging the connecting pin 16. Relief holes 15b are bored on both sides of the central portion, providing a deflection allowance when the connecting pin 16 passes through this central portion with moderation. The connecting pin 16 has a flange portion 16a, and the flange portion 16a is fitted into the stepped portion 15c of the support 15. A retaining plate 18 is caulked and fixed to the lower part of the connecting pin 16, and the rotating lever 13 and the support 15 are connected to the stepped portion 1.
5c and the retaining plate 18. The connecting pin 16 may be held on the rotary lever 13 by screws, circlips, etc. Washers such as thrust adjustment washers and wave washers are provided between the zero-rotation lever 13 and the retaining plate 18. 19 has been inserted.

It is preferable that the washers 19 be subjected to friction reduction treatment in order to improve sliding properties.

Next, the operation of the first embodiment will be explained using mainly FIGS. 2 and 3.

FIG. 2 shows the fully concealed state, and the connecting pin 16 is fitted into the engagement hole of the elongated hole 15a that is closer to the pivot shaft 10 on the passenger seat side. During snowfall, when lightning accumulates around the rear end 5 of the engine hood as shown in Figure 1, the wiper blades 3, 3A are moved to the downward inverted position due to the movement of the connecting rod 12 to the right in Figure 1 to the close side. 6,6A
When trying to proceed to the lower inversion position 6, this snow obstructs the movement.
It will not be possible to reach 6A, and the load will be applied from the snow side. At this time, wiper blade 3A.

A large tensile load is applied to the link rod 14 via the wiper arm 4A and the rotating lever 13A.

Since the link rod 14 is connected to the rotating lever 13 by the fixed pin 17, the rotating lever 13 is connected to the pivot shaft 1.
It attempts to rotate counterclockwise around 0 as shown by the arrow in the second figure. Then, due to the reaction force of the force that causes the rotary lever 13 to rotate counterclockwise, the connecting pin 16 is pushed out by the connecting rod 12 and fits into the other retaining hole of the elongated hole 15a with moderation. The figure shows this state. As a result, the distance from the pivot shaft 10 to the connecting pin 16 becomes longer, so the rotation angle of the rotating lever 13 becomes smaller with respect to the connecting rod 12 that reciprocates the same distance, and the wiper arm 4, the wiping angle at which the wiper blade 3 operates is smaller than θp (full concealment).
Switched to ゛ (semiconductor shield), wiper blade 3
The lower reversal position 6 is switched to the lower reversal position 7 with less Δθp. The same applies to the wiper blade 3A. here,
The switching angle Δθp is expressed by the following formula.

Δθp=θp−θp゛ (Second and Third Embodiments) Other structures for holding the connecting pin 16 on the rotary lever 13 so as to be movable with moderation are provided as second and third embodiments of the present invention. In the first embodiment shown in FIGS. 5 and 6, the support 15 is made of an elastic material such as synthetic resin to adjust the load when the connecting pin 16 moves. As in the second embodiment shown in FIG. 5, the central part of the elongated hole 15a may be pressurized by a fixing guide pin 20 that is pressurized by a compression spring 22. It is approximately V-shaped and held by a holder 21 fixed to the rotating lever 13 with a fixing screw 23, and the connecting pin 1
6 is pressurized in one direction. When a load is applied to the rotary lever 13 by the link rod 14, the guide pin 20 slides, and the connecting pin 16 becomes movable within the elongated hole 15a with moderation. No. 3 shown in Figure 6
Similarly, in the embodiment, the connecting pin 1 is connected by a substantially U-shaped leaf spring 24.
6, a strong leaf spring 24 is fixed to the cut and raised portion 25 of the rotating lever 13 with a rivet 26, and the connecting pin 16 is held in the center of the elongated hole 15a with moderation. It is. The cut-and-raised portion 25 may be a separate object fixed to the rotary lever 13.

The tensile load applied to the link rod 14 may be generated by stopping the wiper blade 3A and manually pulling the wiper blade 3A upward as shown in FIG. 1.

(Fourth Embodiment) The configuration of the fourth embodiment will be described in FIGS. 7 to 9 with reference to FIG. 1.

In the fourth embodiment, the link rod 14 is connected to the rotary lever 13 by a fixing pin 30, and a slider 31 is slidably held between two guides 13a cut and raised on the rotary lever 13. has been done. As shown in FIG. 9, the slider 31 is fitted into a case 31a made of synthetic resin or the like with good sliding properties. The slider 31 is connected to the connecting rod 12 by a connecting pin 32. The other pin shaft 33 rotatably fitted to the slider 31
A hexabrod 34 is fixed. The sub-rod 34 is rotatably connected by a pin shaft 36 to a switching lever 35 with the pivot shaft 10 of the rotation lever 13 as a fulcrum. A spring guide 38 is rotatably connected to the switching lever 35 by a retaining pin 37, and another spring guide 40 is rotatable to a pin shaft 39 fixed to the rotary lever 13.
are slidably fitted, and both spring guides 3
A compression spring 41 is installed between 8.40 and 40.

The rotation range of the switching lever 35 is defined by two stoppers 13b cut and raised on the rotation lever 13. The slider 31 is slidably attached between the guides 13a by a presser plate 43 shown at the top in FIG.

In the above configuration, during full concealment such as in summer, the rotary lever 13 is in a state where the connecting pin 32 is shifted to the left of the fixed pin 30, as shown in FIG. When winter comes and snow accumulates around the rear end 5 of the hood in the fully concealed state, the movement of the connecting rod 12 toward the closing side moves the wiper blade 3A to the lower inverted position 6A in the fully concealed state. During the wiping operation, the zero-rotation lever 13 receives a tensile load on the link rod 14 through the wiper arm 4A and the rotary lever 13A due to the snow being hit during the wiping operation. 7. When the pivot lever 13 tries to rotate counterclockwise around the pivot shaft 10 in the counterclockwise direction shown in FIG. It is pushed by the connecting rod 12 to the right as shown in FIG. 7, and slides in the direction guided by the guide 13a.

The sub-rod 34 is simultaneously moved by the slider 31 via the pin shaft 33 to the first! I is pulled to the right as shown in the diagram, and the pin shaft 3
6, the switching lever 35 is rotated clockwise R about the pivot shaft 10, and the switching lever 35 rotates while compressing the compression spring 41 between the spring guides 38 and 40. Then, when the switching lever 35 rotates beyond the line connecting the centers of the pivot shaft 10 and the pin shaft 39,
Due to the elastic force of the compression spring 41, the switching lever 35 is pressed against the lower stopper 13b with moderation and stopped, as shown in FIG.

As described above, when the switching lever 35 rotates and the slider 31 is moved to the right as shown in FIG.
1 increases, the rotation angle of the rotary lever 13 becomes smaller for the same reciprocating stroke of the connecting rod 12 connected to the connecting pin 32, and as a result, the wiper blade The wiping angle θp during full concealment of 3.3A is automatically switched to the wiping angle θp' during semi-concealed shielding.

The sliding amount and sliding direction in which the connecting pin 32 coupled to the connecting rod 12 moves due to the sliding movement of the slider 31 are the same as the sliding amount and sliding direction of the connecting pin 16 determined by drawing in FIG.

(Fifth Embodiment) In the fourth embodiment shown in FIGS. 7 to 9, the operating position of the switching lever 35 is changed while compressing the compression spring 41, but other elastic bodies may be used. The operating position of the switching lever 35 may be switched, for example, as in the fifth embodiment shown in FIG.
It is also possible to have a structure that uses .

(Sixth Embodiment) The configuration of the sixth embodiment will be described with reference to FIGS. 11 and 12 and FIG. 1.

In the sixth embodiment, the rotating lever 13 is formed into a substantially triangular shape, and an auxiliary rotating lever 45 having a substantially triangular shape is rotatably fixed to the rotating lever 13 by a pin shaft 57. A link rod 14 is coupled to the movable lever 13 by a fixed pin 50. Auxiliary rotation lever 45
A one-turn lever 13 connected to a connecting rod 12 by a connecting pin 51 is rotatable about a pivot shaft 10. One end of a sub-rod 46 is swingably fixed to the auxiliary rotation lever 45 by a fixing pin 52, and the other end of the sub-rod 46 is fixed to one end of a switching lever 47 with a pivot axis IO as a fulcrum by a fixing pin 53. combined. The other end of the switching lever 47 has a spring guide shape, into which one end of another spring guide 48 is inserted, and a compression spring 56 is guided and held between both spring guides. Spring guide 4
The other end of 8 is attached to one end of the sub-switching lever 49 with the fixing pin 5
4, it is rotatably fixed.

Further, the other end of the sub-switching lever 49 is rotatably fixed to the rotary lever 13 by a fixing pin 55, and the single-rotation lever 13 is provided with two stoppers 13C.
The rotation range of the sub-switching lever 49 is restricted by both stoppers 13c.

Connecting pin 51 and pin shaft 57 in auxiliary rotation lever 45
Assuming that when the auxiliary rotation lever 45 rotates about the pin shaft 57, the center of the connecting pin 51 switches to the points J1 and J2 shown in FIG.
The center of the pin shaft 57 is placed on the perpendicular bisector of the line segment connecting the two pins. Note that the passenger seat side wiper arm 4 is fixed to the pivot shaft 10 with the connecting pin 51 on the rotary lever 13 being at the point JO.

FIG. 11 shows fully concealed R (summer).

In the illustration in FIG. 1, when an upward load is applied to the wiper arm 4A on the driver's seat side by snow or hands, a tensile load is applied to the link rod 14. At this time, as shown in FIG. 11, since the link rod 14 is pulled leftward, the rotating lever 13 attempts to rotate counterclockwise about the pivot shaft 10.

When the rotating lever 13 attempts to rotate counterclockwise, the auxiliary rotating lever 45 is pushed by the connecting rod 12.
It rotates clockwise around the pin shaft 57. At this time, the auxiliary rotation lever 45 pulls the sub-rod 46. Since the sub-rod 46 pulls the switching lever 47, the switching lever 47 also rotates clockwise around the pivot shaft 10. When the switching lever 47 rotates clockwise, the compression spring 56 is initially compressed between the sub switching lever 49 and the switching lever 47 crosses the line connecting the center of the pivot shaft 10 and the center of the fixed pin 55. When rotated, the compression spring 5
The sub-switching lever 49 is rapidly rotated by the elastic force of 6 and fixed to the lower stopper 13c with moderation. As a result, the distance between the center of the pivot shaft 10 and the center of the connecting pin 51 increases, so the wiping angle θp during full-con shielding changes from the wiping angle θp° during semi-con shielding, from semi-con shield (winter) to full-con shield (
When returning to summer), the movement is completely opposite to the above.

FIG. 12 shows a state in which switching is not performed during semi-contact shielding (winter). The distance between the center of the connecting pin 51 of the auxiliary rotation lever 45 and the center of the pivot shaft 10 is Ro before switching, and R1 after switching. Therefore, when looking at the lower reversed side, the center of the connecting pin 51 should rotate from point Jo to point J. However, the connecting pin 51
The connecting rod 12 is connected to the connecting pin 5.
1 is located on a locus circle whose radius is the length RL of the connecting rod 12, centered on the connecting portion of the connecting rod 12 on the motor 90 side, that is, the connecting portion on the lower reverse side of the crank arm 9a and the connecting rod 12. Point J.

will be returned to. That is, when the rotating lever 13 is rotated by the tensile load of the link rod 14, the center of the connecting pin 51 on the lower reverse side moves from point J to point J2.
It rotates about Δθp/2 with respect to the original position point J0. At the same time, the radius of rotation of the connecting pin 51 relative to the pivot shaft 10 changes from Ro to R1. The swing range of the rotary lever 13 during semi-concealed (winter) is from point J on the lower inversion side to point J2° on the lower inversion side, but the wiper arm 4
Regarding the movement, the wiper arm 4 is initially fixed to the pivot shaft 10 at an angle forming the rotation lever 13 with the center of the connecting pin 51 at point J on the lower reverse side, as described above. When the rotary lever 13 rotates from point J1 to point J, wiper arm 4 rotates from point J0 to point J1.

That is, the lower inverted position of the wiper arm 4 rises by Δθp.

Next, regarding the lower inversion position, the auxiliary rotation lever 45
The center of the upper connecting pin 51 rotates to the point J,', but since the wiper arm 4 is integrated with the rotating lever 13, the center position of the upper connecting pin 51 is actually approximately Δθp/2 ahead of the center position. There is. In other words, even when the wiper arm 4 is semi-concealed (in winter), the wiper arm 4 is in the lower inverted position 8 shown in FIG.
to invert.

The wiping angle of the wiper arm 4A on the driver's seat side is also switched in exactly the same manner by the mechanism on the passenger seat side described above.

In the sixth embodiment, the compression spring 56 is used as the switching spring, but other elastic bodies may be used.

"Effects of the Invention" As described above, the wiper device of the present invention includes a connecting rod that is crank-coupled to the wiper motor and reciprocates;
a rotary lever that is coupled to the connecting rod and rotates; a first wiper arm that rotates together with the rotary lever;
A second wiper arm is provided which is rotated based on the reciprocating movement of a link rod coupled to the rotary lever, and the coupling position relationship between the rotary lever and the connecting rod and the link rod can be moved with moderation. Therefore, when snow accumulates in the wiper blade storage position or when a tensile load is manually applied to the link rod, the coupling position between the rotary lever, the connecting rod, and the link rod moves, and the rotary lever is moved. Since the rotation angle of the wiper blade changes automatically, it is extremely easy to change the wiping angle of the wiper blade.Also, since the wiping angle is automatically changed, it is perfectly possible to protect the strength of the wiper device. It has an excellent effect.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of a wiper device according to a first embodiment of the present invention, FIG. 2 is an explanatory diagram showing a fully concealed state of a part of the rotary lever in the first embodiment, and FIG. An explanatory diagram showing a semi-concealed state of a part of the rotary lever in the embodiment, FIG. 4 is a sectional view taken along line AA in FIG. 3, and FIGS. 5 and 6 show the second and third embodiments. cross section,
FIG. 7 is an explanatory diagram showing a fully concealed state of a part of the rotating lever in the fourth embodiment, FIG. 8 is an explanatory diagram showing a semi-concealed state of a part of the rotating lever in the fourth embodiment, and FIG. 9 is an explanatory diagram showing a semi-concealed state of a part of the rotating lever in the fourth embodiment. FIG. 10 is an exploded perspective view showing the structure of a part of the rotating lever in the fourth embodiment, FIG. 10 is an exploded perspective view showing the fifth embodiment, and FIGS. 11 and 12 are explanatory diagrams showing the sixth embodiment. . 3.3A, Wiper blade, 4,4A, Wiper arm, 6,7.6A, 7A, Lower inverted position,
8.8A, , upper inversion position, 909. Wiper motor rotation center, 9a, Crank arm, 10.11.
,, pivot axis, 12. ,, connecting rod, 13,,
, rotating lever, 14. ,, link rod, 15,,
,Support, 15a, ,Elongated hole, 15b, ,. Escape hole, 16. ,,Connecting pin, 20,,Fixing guide pin, 22. ,, compression spring, 24.
. 1. Leaf spring, 30. ,,Fixing pin, 31,,Slider, 32,,,Connecting pin, 35. ,, switching lever, 38.40. ,,Spring Guide, 41,
,, compression spring, 42. ,, annular spring,・
456°, auxiliary rotation lever, 46,, sub rod, 47°1. Switching lever, 48, Spring guide, 49, Sub switching lever, 50, Fixed pin, 51°1. Connecting pin, 57, pin shaft,
90. ,. wiper motor.

Claims (3)

[Claims] (1) A connecting rod that is crank-coupled to the wiper motor and reciprocates, a rotating lever that is coupled to the connecting rod and rotates, a first wiper arm that rotates together with the rotating lever, and the rotating lever. a second wiper arm that is rotated based on the reciprocating motion of a link rod coupled to the wiper arm; and means that allows the coupling position relationship between the rotary lever, the connecting rod, and the link rod to be moved with moderation. A vehicle wiper device characterized by: (2) The rotary lever is coupled to the connecting rod via a connecting pin and a connecting member, and the connecting position of the connecting pin to the rotary lever can be moved with moderation. wiper device for vehicles. (3) The connecting pin is rotated so that it is on a circular locus whose radius is the length of the connecting rod and whose center is the joint between the connecting rod and the crank arm when the rotating lever reaches the upper inversion position. 3. The wiper arm according to claim 2, wherein the first and/or second wiper arm does not change its upper inverted position before and after the connecting position of the connecting pin relative to the rotating lever is moved. wiper device for vehicles.