JPH01240346A - Wiper device for car - Google Patents

Abstract

PURPOSE:To protect a wiper device from damage by allowing No.2 lever to shift its position moderately with respect to a pivot shaft on which No.1 lever is pivoted, and thereby providing automatic changeover of the wiping angle of wiper blade in the event of snow fall. CONSTITUTION:A No.1 rod 12 is mounted on a wiper motor shaft through a crank arm, and No.1 lever 13 is rotated with reciprocation of this rod 12 to cause wiping motion of a wiper arm on assistant seat side, which is coupled with a pivot shaft 10 as the center of rotation of this lever 13. Another wiper arm on driver's seat is put in wiping motion through a No.2 rod 14. When an upward oriented load is applied to this wiper arm 4A on the driver's seat side because of snow fall, etc., the No.1 lever 13 is hindered from rotating, and the force from a crank arm 9A heaves No.2 lever 16 aslant upward. Now this No.2 lever 16 slides on the No.1 lever 13 to turn into the wiping condition B to suit the winter weather.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] 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] 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 includes a rotating crank arm, a crank bin fixed on the crank arm,
An eccentric bushing is rotatably attached to the crankbin and has a central axis eccentric from the central axis of the crankbin, and an eccentric bushing is rotatably attached to the eccentric bushing and makes reciprocating motion as the crank arm rotates. It includes a wiper link rod and a wiper blade that rotates due to the reciprocating movement of the wiper link rod, and further includes a lever that is integrated with the eccentric bushing and can rotate around the crankbin together with the eccentric bushing. The eccentric bushing has a slider that can be slid approximately in the radial direction of the eccentric bushing while connected to the wiper link rod. It was designed to be connected and fixed to the crank arm side. However, in order to switch the wiping angle with conventional wiper devices, the user must stop the wiper blade in the downward inverted position, open the hood, remove the rubber stopper from the working hole, and change the fixed position of the slider with a screwdriver. I had to do some tedious work.

This is especially difficult in a blizzard, and if snow accumulates in the wiper blade storage position, the wiper blade will hit the snow that has accumulated in the storage position before it reaches the lower reversed position, so it is difficult to protect the strength of the wiper device. Even when I looked at it, I couldn't say it was perfect.

[Problems to be Solved by the Invention] The present invention has been made to solve the above problems, and provides a wiper device that automatically switches the wiping angle of the wiper blade when snow accumulates in the wiper blade storage position. To provide a wiper device capable of switching the wiping angle with one touch by manually applying a strong tensile force to the wiper arm as necessary.

"Means and Actions for Solving the Problems" The configuration of the wiper device of the present invention for solving the above problems includes: a first rod that is crank-coupled to a wiper motor and reciprocates;
a second rotating lever connected to the first rod by a pin; a movable member connected to the second = 3- rotating lever; and a movable member connected to the second rotating lever and centered about the pivot axis a first rotary lever that rotates, a first wiper arm that rotates together with the first rotary lever, and a first wiper arm that rotates based on the reciprocating motion of a second rod coupled to the first rotary lever. 2 wiper arms, and the second rotating lever has a support member having an elongated hole through which the pivot shaft is inserted at the joint portion of the second rotating lever with the pivot shaft of the first rotating lever; The support member is characterized in that it has an elastic member that applies an elastic force from both sides of the substantially central portion of the elongated hole, so that the position of the second rotating lever relative to the pivot shaft can be moved with moderation.

According to the configuration of the present invention, when a tensile load is applied to the second rod, the first rotating lever stops, so the second rotating lever is pushed by the first rod driven by the wiper motor, and the support member The distance between the pivot axis of the first rotating lever and the pin of the second rotating lever increases by overcoming the elasticity of the elastic member in the elongated hole, so that the same reciprocating distance of the first rod In contrast, the rotation angle of the first rotation lever is decreased and the rotation angles of the first and second wiper arms are decreased, so that the wiping angle of the wiper blade driven by these wiper arms is decreased.

The wiper device according to claim (2) of the present invention is characterized in that the movable member is held slidably in the longitudinal direction of the first rotating lever.

According to this configuration, since the movable member moves smoothly along the longitudinal direction of the first rotating lever, even after switching the wiping angle, the movable member can smoothly move the first rotating lever and the second rotating lever. is reciprocated stably and reliably.

The wiper device according to claim (3) of the present invention is characterized in that the movable member is rotatably connected to the second pivot lever and the first pivot lever. According to this configuration, since the first rotating lever and the second rotating lever connected by the movable member can rotate while sliding relative to each other, it is possible to manually apply a tensile load to the second rod. Therefore, it is easy to rotate the second rotating lever relative to the first rotating lever and switch the wiping angle by hand.

"First Embodiment J Next, a first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

As shown in FIG. 1, a windshield glass 1 is wiped by a wiper blade 3 in a wiper wiping area 2. As shown in FIG. The wiper blade 3 is connected to the wiper arm 4, and during full concealment such as in the summer, the wiper blade operates from the lower inversion value N6 to the upper inversion position N8, and when semi-contained in the winter, it wipes from the lower inversion position 7 during semi-containment shielding. Similarly, the wiping operation is performed up to the on-road reversal position 8. The lower reversal value W6 during full concealment is below the rear end 5 of the hood, and the lower reversal position 7 during semi-concealed is above the rear end 5 of the hood. The area around the rear end portion 5 of the hood is a place where snow accumulates during snowfall. A mechanism that enables automatic switching between the lower reversal positions 6 and 7 of the wiper blade 3 is provided around a pivot shaft 10 that forms the center of the first rotating lever 13. A first motor is connected to the wiper motor rotation center 9 via a crank arm 9a.
0. Rad 12 is installed, and this 10th Rad 12
The rotational movement of the wiper motor rotation center 9 is transmitted as a rotational movement to the first rotational lever 13 through the wiper arm 4 connected to the passenger side pivot shaft 10 that forms the rotational center of the first rotational lever 13. The structure is such that the windshield glass 1 is wiped by a wiper blade 3 rotated through the wiper blade 3.

The rotational movement of the first rotating lever 13 is transmitted to the driver's seat side pivot shaft 11 by the 20th bolt 14 and the rotating lever 13A, and the windshield glass 1 is further wiped by the wiper blade 3A rotating together with the wiper arm 4A. Ru.

The summer/winter switching mechanism of the first embodiment will be described below with reference to FIGS. 2 and 3. Figure 2 shows the fully concealed condition in summer. The mechanism located around the passenger seat side pivot shaft 10 is the switching mechanism of the first embodiment. The wiping angle when fully concealed is θ on the passenger's seat side and θ on the driver's seat side. shall be. When a load is applied upward in FIG. 2 to the wiper arm 4A on the driver's seat side due to snow or hands, a tensile load is applied to the 20th lever 14, which prevents the first rotation lever 13 from rotating, and the 10th lever 14 is prevented from rotating. 12 receives a force from the wiper motor rotation center 9 via the crank arm 9A, and pushes up the second rotating lever 16 diagonally upward to the right in FIG. As shown in FIG. 3, the semi-concealed state changes in winter.

A detailed explanation of the first embodiment will be given with reference to FIGS. 4 to 6.

In FIG. 4, components and structure will first be explained. A first rotating lever 13 is integrally fixed to the passenger seat side pivot shaft 10, and a pin 26 that is rotatable to the 20th pin 14 is coupled to the tip side of the first rotating lever 13. .

A slider 15 is placed on the upper surface of the first rotating lever 13. The slider 15 is laterally restricted by a side stopper 13a of the first rotating lever 13. Slider 15
has an elongated hole 15b at one end and is fitted onto the pivot shaft 10, and has an i-shaped structure that can slide only at the pitch of the elongated hole 15b. The hole 15c in the middle of the slider 15 is intended for weight reduction and grease storage. The slider 15 is preferably made of a material such as synthetic resin to improve sliding properties and avoid sticking, but other materials such as metal can also be used as long as they have good sliding properties. Furthermore, the other end of the slider 15 is connected to a bin 25 connected to the second pivot lever 16 and a hole 1.
5a. The pin 25 is fitted into the second rotation lever 16 so as to project upward and downward from the second rotation lever 16, and rotatably couples the tenth pin 12 at the pin portion projecting upward. Note that the upper and lower bin parts of the bin 25 may be separated. A cylindrical holder 16a is integrally provided on the second rotating lever 16, and an annular sliding portion 17e of the support 17 is fitted into this holder 16a. The support 17 has a grease reservoir 17f formed by cutting out a part of the sliding portion 17e, and also has a waterproof cover 17d formed in the shape of a brim on the upper part. Further, the sabot 17 has a groove 17b on the inner circumferential side into which a C-shaped leaf spring 18 is inserted, and an elongated hole 17g. The bent portion 18a of the leaf spring 18 is located approximately at the center of the elongated hole portion 17g. A cylindrical holder portion 19 attached to a plate-shaped passenger seat side holder body 19
b fits into the elongated hole 17g of the support 17, and is further pressed by the bent portion 18a of the plate spring 18 to the collar portion 17c or the stopper portion 17h. Two stopper portions 19a are cut and raised in the holder body 19, and the movement of the support 17 is controlled by the stopper surface 17a provided by a two-sided notch in the waterproof cover 17d of the support 17.
It is regulated in a direction parallel to a line connecting point P and point I]' shown in the figure. The second rotating lever 16 and the support 17 are thrust-adjusted by thrust washers 22, 24 and wave washers 23, are held between the slider 15 and the holder body 19, and are fitted into the groove 10a at the tip of the pivot shaft 10. It is fixed via a flat washer 21 with a snap ring 20.

The operation of the first embodiment will be explained below.

In FIG. 1, when snow accumulates around the rear end portion 5 of the hood during snowfall, a tensile load acts on the 20th tube 14. As shown in FIGS. 4 and 5, the bottle 26
Since the first rotary lever 13 coupled with the first rotary lever 13 attempts to rotate counterclockwise, a reaction force acts on the slider 15 whose sliding direction is regulated by the side stopper 13a. The slider 15 is moved by the pin 25 to the second rotating lever 16 and the tenth rotating lever.
Since the slider 15 is connected to the crank arm 9A, the slider 15 slides in a direction extending from the connecting portion of the tenth rod 12 to the crank arm 9A. For this reason, the second rotating lever 16 coupled to the bin 25 of the slider 1.5 is also pulled, and the holder 16a moves together with the supports 1 to 17, so that the center of rotation of the holder 16a is shifted to P as shown in FIG. Move from point to point P'. After the holder 16a is moved, as shown in FIG. 4, the holder part 19b comes out of the leaf spring 18 and is pressed by the leaf spring 18 to the stopper part 17h side of the elongated hole part 17g, so that the second rotation lever 16 cannot be rotated. =11- The center of rotation is fixed at point P' shown in FIG. Since the distance from the center of the pivot shaft 10, which is the center of rotation of the first rotating lever 13, to the bin 25 of the second rotating lever 16 increases, the rotation angle of the first rotating lever 13 is fully concealed. From θ2 at time to θ2′ at semicon shielded
The end point of the center position of the bottle 25 connected to the tenth rod 12 shifts from the five points shown in FIG. 6 to the J° point.

In other words, when fully concealed, such as in the summer, the first rotating lever 13. The center of rotation of both the slider 15 and the second rotating lever 16 is point P, but during semi-concealed weather such as in winter, the center of rotation of only the second rotating lever 16 is point P'. The slider 15 located between the first rotation lever 13 and the second rotation lever 16 rotates following the rotation locus of the bin 25 on the second rotation lever 16, and the slider 15
Since the center of rotation of is at point P, the slider 15 rotates while sliding with the first rotation lever 13 during semi-concealed operation.

“Second Example” No. 715! Components and structure of the second embodiment will be explained with reference to I.

In the second embodiment, the first rotating lever 13 is formed into a substantially triangular shape, and a passenger seat pivot shaft 1 is provided at the apex angle of one end.
0, a bottle 26 connected to the 20th tube 14 is fixedly installed at the apex corner of the other end, and a bottle 26 is fixedly installed at the apex angle at the center of the rod.
7 is fixed.

Further, the first rotating lever 13 is rotatably coupled to a hole 28a at one end of the sub-rod 28 in the bin 27. The other hole 28b of the sub-rod 28 is rotatably connected to the pin 25 of the second rotating lever 16. Since the sub-rod 28 is sandwiched between the first rotating lever 13 and the second rotating lever 16, a grease reservoir 28c is formed in the shape of an elongated hole to ensure smooth sliding and also to reduce weight. ing. Other components and structures are the same as in the first embodiment.

Next, the operation of the second embodiment will be explained with reference to FIGS. 7 to 9. FIG. 8 shows the state during full concealment, such as in summer. The wiping angle during full concealment is θ2. Although only the vicinity of the pivot shaft 10 on the passenger seat side is shown in FIG. 8, the switching angle is similarly switched on the driver seat side.

When an upward load is applied to the driver's seat side wiper arm 4A (see FIG. 1) due to snow or hands, a tensile load is applied to the 20th rod 14. The first pivot lever 13 is the 20th lever 1
4 and tries to rotate counterclockwise around the pivot shaft 10. The sub rod 28 is the first rotating lever 13
, and pushes the second rotating lever 16 via the pin 25, so the second rotating lever 16 also tries to rotate counterclockwise. However, since the second pivot lever 16 is connected to the tenth arm 12 by the pin 25, the second pivot lever 16
The wiper motor is pushed to the right in FIG. 8 by the driving force from the wiper motor rotation center 9, centering on the connecting portion with the crank arm 9a of No. 2. Then, the leaf spring 18 of the support 17 at the other end of the second rotating lever 16 opens, and the second rotating lever 16
is pushed out. At this time, the sub-rod 28 connected to the second rotating lever 16 rotates around the pin 27 of the first rotating lever 13 . The support 17 is the holder body 19
Since the direction of movement is restricted by the stopper portion 19a, it slides in a certain direction. FIG. 9 shows a semi-concealed state in which the wiping angle has been changed. After the second pivot lever 16 moves, the leaf spring 18 causes the holder part 19b to move to the stopper part 1 on the support 17.
It is held down and fixed at 7h. After the movement, the center of rotation of the second concave lever 16 shifts from point P to point P' as shown in FIG. Since the distance from point P, which is the center position of the pivot shaft 10, to point J', which is the center position of the pin 25, is increased, the wiping angle is reduced, and the semi-concealed state becomes more semi-concealed than 02 when fully concealed. It is switched to θ2' at the time. When fully concealed, the rotation center of the first rotary lever 13 and the second rotary lever 16 is point P, and when semi-concealed, the rotation center of the first concave lever 13 is point P, which remains unchanged. Only the rotation center of the second rotation lever 16 is point P', and the difference in the trajectory of the second rotation lever 13 and 16 with different rotation centers is the sub rod 2.
8 is absorbed by rotating around pin 27.

"Effects of the Invention" As described above, in the wiper device of the present invention, the second pivot lever has an elongated hole in the joint portion with the pivot shaft of the first pivot lever, through which the pivot shaft is inserted. The support member has an elastic member that applies an elastic force from both sides of the substantially central part of the elongated hole, and the position of the second rotating lever relative to the pivot shaft can be moved with moderation. Because of this, when snow accumulates in the wiper blade storage position, the wiper blade's wiping angle is automatically changed to protect the wiper device, and the automatic feature eliminates the need for manual switching. It is effective, and even when changing the wiping angle manually, it can be done with a simple one-touch operation.

Moreover, when the movable member is held slidably in the longitudinal direction of the first rotating lever, automatic switching of the wiping angle is performed stably and reliably. The same applies when the movable member is rotatably connected to the second rotation lever and the first rotation lever.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the overall configuration of a wiper device according to the first embodiment of the present invention, Fig. 2 is a schematic diagram showing the state when fully concealed in summer, and Fig. 3 is a schematic diagram showing the state during semi-con shielded in winter. FIG. 4 is an exploded perspective view showing the components and structure of the wiper device of the first embodiment,
FIG. 5 is a plan view showing the state around the pivot shaft in the first embodiment when it is fully shielded, FIG. 6 is a plan view showing the state around the pivot shaft in the first embodiment when it is semi-contained, and FIG. FIG. 8 is an exploded perspective view showing the components and structure of the wiper device of the second embodiment, FIG. 8 is a plan view showing the state around the pivot shaft in the second embodiment when it is fully concealed, and FIG. 9 is a diagram of the second embodiment. FIG. 3 is a plan view showing a semi-concealed state around the pivot shaft. 3.3A, wiper blade, 4.4A, wiper arm, 99. , wiper motor rotation center, 10,
,,Passenger side pivot axis, 12. ,, 10th Sodo,
13. ,,first rotation lever, 15,,,slider, 16,,,second rotation lever, 17,,,.
Support, 17 g, Long hole part, 18. ,,
Leaf spring, 25, bottle, 28. ,, sub rod.

Claims (3)

[Claims] (1) A first rod that is crank-coupled to the wiper motor and reciprocates, a second rotating lever that is coupled to the first rod with a pin, a movable member that is connected to the second rotating lever, and A first rotary lever that is connected to the second rotary lever by a movable member and rotates about a pivot shaft; a first wiper arm that rotates together with the first rotary lever; and a first wiper arm that is coupled to the first rotary lever. and a second wiper arm that is rotated based on the reciprocating motion of the second rod, and the second rotary lever passes through the pivot shaft at a joint portion with the pivot shaft of the first rotary lever. The support member has an elongated hole formed therein, and the support member has an elastic member that applies an elastic force from both sides of the elongated hole approximately in the center, and the second rotating lever is positioned with respect to the pivot shaft with moderation. A vehicle wiper device characterized by being movable. (2) Claim (1) characterized in that the movable member is held slidably in the longitudinal direction of the first rotating lever.
The vehicle wiper device described. (3) The movable member includes the second pivot lever and the first pivot lever.
The wiper device for a vehicle according to claim 1, wherein the vehicle wiper device is rotatably connected to a rotating lever.