JPH0454053Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a direction switching device for a window washer nozzle attached to a wiper arm of an automobile.

(Prior Art) Conventionally, there is a window washer nozzle that is attached to a wiper arm as shown in FIG. 4, for example. That is, in FIG. 4, a wiper arm 51 that reciprocates and rotates on the front windshield or rear windshield of an automobile by a drive shaft is provided with a rubber wiper blade 52 for wiping the windshield.
In order to improve the wiping performance of the wiper blade 52, a nozzle 53 for spouting washer fluid onto the windshield is attached to either point S or point T in the diagram of the wiper arm 51.

(Problem) Since such a conventional window washer nozzle was fixedly attached to a proper position on the wiper arm 51, the washer liquid spouted from the nozzle was not attached to the wiper blade 5.
It is ejected only on one side of 2. Therefore, when the advancing direction of the wiper blade 52 and the jetting direction of the washer liquid jetted from the nozzle 53 match, the wiping performance of the wiper blade 52 is good;
If the traveling direction of the washer liquid does not match the direction of the washer liquid ejected from the washer nozzle, there is a problem in that the wiping performance deteriorates.

(Means for Solving the Problems) The present invention has been devised in view of the above problems, and is a reversible wiper blade that is capable of always spouting washer fluid in the forward direction of the wiper blade attached to the wiper arm. The purpose of this device is to provide a device for changing the direction of a washer nozzle, which is supported by a drive shaft and is attached to a wiper arm that reciprocates on the windshield. a nozzle cam equipped with a nozzle for ejecting; an intermediate cam pivoted to a wiper arm in proximity to the nozzle cam so as to be able to switch the nozzle direction of the nozzle cam;
and an intermediate cam rotating means fixed to the vehicle body side that rotates the intermediate cam when the wiper arm reaches a rotation end and reverses the nozzle of the nozzle cam in the advancing direction of the wiper arm. It is in.

(Function) A nozzle cam and an intermediate cam are pivoted close to each other on the wiper arm that reciprocates and rotates on the windshield, and the nozzle cam is equipped with a nozzle capable of spraying washer liquid.
The intermediate cam includes an intermediate cam that is fixed to the body side and can rotate the intermediate cam when the wiper arm reaches its rotation end, thereby reversing the direction of the nozzle attached to the nozzle cam to the advancing direction of the wiper arm. Since the rotation means are linked, when the wiper arm is driven by the drive shaft and rotates back and forth on the windshield, when the wiper arm reaches the rotation end, the intermediate cam is rotated by the intermediate cam rotation means. By the rotation of this intermediate cam, the nozzle cam is rotated in the direction of movement of the wiper arm, and the nozzle attached to the nozzle cam is reversed in the direction of movement of the wiper arm. Therefore, the nozzle attached to the wiper arm is always oriented in the direction of movement of the wiper arm in conjunction with the rotational movement of the wiper arm, and the washer liquid can be sprayed forward in the direction of movement of the wiper arm.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

1 and 2 show a first embodiment of the present invention, FIG. 1 being a side view and FIG. 2 being a bottom view thereof. In the figure, one end of a wiper arm 2 is fixed perpendicularly to the tip of a drive shaft 1 that protrudes outward from a body V of an automobile. Therefore,
A drive motor (not shown) provided in the body V reciprocates the drive shaft 1 within a certain rotation range, and the wiper arm 2 reciprocates through the drive shaft 1 at a constant rotation angle. do. A rubber-like wiper blade 3 is attached to the tip of the wiper arm 2 on the opposite side from the drive shaft 1. This wiper blade 3 is the wiper arm 2
slides on the window glass according to the rotational movement of
It is used to wipe the windshield. A first shaft 4 is fixed to the wiper arm 2 so as to project from the bottom side thereof in a hanging manner. A nozzle cam 5 having a substantially elliptical planar shape is rotatably attached to the lower end of the first shaft 4 .

A nozzle 6 is fixed to the tip of the nozzle cam 5 on the wiper blade 3 side. This nozzle 6
A washer hose 7 that communicates with a washer tank in the body V of the automobile is connected to the washer hose 7, and the washer fluid can be jetted out from the nozzle 6 through the washer hose 7.

Further, the wiper arm 2 on the drive shaft 1 side of the first shaft 4 has a second shaft 8 that hangs down adjacent to the first shaft 4.
is fixedly protruding. The lower end of the second shaft 8 has a substantially elliptical tip portion 9a on the nozzle cam 5 side.
An intermediate cam 9 having a substantially heart shape is rotatably attached to the intermediate cam 9. The tip 9a of this intermediate cam 9
and the rear end portion 5b of the nozzle cam 5 are in contact with each other. A tension spring 10 is hung between the nozzle cam 5 and the intermediate cam 9, and tensions both cams.

Further, a pair of stopper pins A and B are fixed in the width direction of the intermediate cam 9 so as to hang down from the wiper arm 2, and restrict the rotation range of the intermediate cam 9.

On the other hand, on the peripheral edge side of the drive shaft 1, a fixed cam 11 having a through hole 11c with an inner diameter larger than the outer diameter of the drive shaft 1 is fitted around the drive shaft 1 to form an automobile body V.
Fixed. A pair of locking claws 11a and 11b are integrally formed on the fixed cam 11 at an angular position that substantially matches the rotation angle of the wiper arm 2. The distal end portions of each of the locking claws 11a and 11b are arranged at a position where they come into contact with the rear end portion 9b of the intermediate cam 9.

In the device of this example configured in this way, the wiper arm 2 is moved by driving the drive shaft 1.
starts rotating and the wiper arm 2 is rotated to the lower rotation end, the rear end 9b of the intermediate cam 9 comes into contact with the locking pawl 11b of the fixed cam 11 fixed to the body V. , the intermediate cam 9 is rotated counterclockwise about the second shaft 8 until it comes into contact with the stopper pin B. Along with this rotation, the tip 9a of the intermediate cam 9 rotates, and the nozzle cam 5, which is in contact with the tip 9a, is rotated clockwise about the first shaft 4. Therefore, the nozzle 6 fixed to the tip 5a of the nozzle cam 5 is tilted upward with respect to the center line of the wiper arm 2, and the nozzle cam 5 is fixed to the tip 9a of the intermediate cam 9 by the tensile force of the springs 10. It becomes fixed in the heart-shaped center. When the wiper arm 2 reversely rotates upward from this state, the nozzle 6 can always inject the washer fluid forward in the direction of movement of the wiper arm 2 on the rotation locus.

On the other hand, when the wiper arm 2 is rotated to the upper rotation end, the rear end portion 9b of the intermediate cam comes into contact with the locking claw 11a of the fixed cam 11, and the intermediate cam 9 is moved to the stopper pin with the second shaft 8 as an axis. It is rotated clockwise until it comes into contact with A. Therefore, the nozzle cam 5 is rotated counterclockwise, and this rotation is instantaneously performed by the tension biasing force of the spring 10. At that time, the nozzle 6 is reversed in a reversely inclined manner with respect to the center line of the wiper arm 2, and as the wiper arm 2 rotates downward, the washer fluid is sprayed toward the front in the direction of movement of the wiper arm 2. can be ejected.

As the intermediate cam 9 comes into contact with the locking claws 11a and 11b that are arranged and fixed in accordance with the rotation angle of the wiper arm 2, the nozzle cam 5 is rotated in the reverse direction, and the nozzle 6 accordingly reverses its direction. Therefore, the washer liquid can always be ejected to the front position of the wiper arm 2 in the direction of movement. Therefore, the washer fluid is always sprayed in the advancing direction of the wiper blade 3 at the tip of the wiper arm 2, improving the performance of wiping the windshield.

Next, a second embodiment of the present invention will be described based on FIG.

The second embodiment is applied when there is a distance between the drive shaft of the wiper arm and the nozzle.

In FIG. 3, a wiper arm 22 fixed to a drive shaft 21 rotates back and forth within a predetermined rotation angle range. The first shaft 2 is fixed to the wiper arm 22 in a hanging manner.
3, a nozzle cam 24 having a substantially planar elliptical shape is rotatably attached to the shaft. A nozzle 25 capable of spraying washer liquid is fixed to the tip 24a of the nozzle cam 24.

In addition, a pair of stopper pins C and D are arranged opposite to each other in the width direction of the nozzle cam 24 to connect to the wiper arm 22.
The nozzle cam 24 is fixedly installed in a hanging shape and restricts the rotation range of the nozzle cam 24.

A second shaft 26 is fixed to the drive shaft 21 side of the nozzle cam 24 in the vicinity of the first shaft 23 in a hanging manner. An intermediate cam 27 is provided at the lower end of the second shaft 26.
is pivotably mounted. This rotating cam 27
A pair of locking claws 27a and 27b having an angle corresponding to the rotation angle of the wiper arm 22 are integrally formed on the. These locking claws 27a and 2
The tip of 7b is the rear end 24 of the nozzle cam 24.
It is arranged at a position where it contacts b. A shaft 27c is fixed to the peripheral edge of the intermediate cam 27 and adjacent to the locking pawl 27b, and one end of a rod-shaped link rod 29 is rotatably attached to the shaft 27c. The other end of the link rod 29 is connected to the drive shaft 2
A shaft 28b fixed to the periphery of a disk-shaped fixing plate 28 having a through hole 28a with an inner diameter larger than the outer diameter of the shaft 28b.
It is attached to the shaft. This fixed plate 28 is the drive shaft 21
It is fixed to the body of the automobile in an external manner. Further, a tension spring 30 is hung between the nozzle cam 24 and the intermediate cam 27 to bias both cams in a tensile state.

In the device of this example configured in this way, when the drive shaft 21 is driven and the wiper arm 22 reaches the lower rotation end, the link rod 29 rotates the intermediate cam 27 counterclockwise, and the intermediate cam 27 is rotated counterclockwise by the link rod 29. The locking claw 27a contacts the rear end 24b of the nozzle cam 24, and the nozzle cam 24 is rotated clockwise until it contacts the stopper pin C. Therefore, the nozzle 25 fixed to the tip 24a of the nozzle cam 24 is in a position inclined upward with respect to the center line of the wiper arm 22, and the tension spring 30
The rotation is instantaneous. When the wiper arm 22 moves upward in this state, the washer fluid can be injected from the nozzle 25 to the front position of the wiper arm 22 in the direction of movement.

On the other hand, when the wiper arm 22 reaches the upper rotation end, the link rod 29
Since the tip of the intermediate cam 27 is located above the second shaft 26 of the intermediate cam 27, the link rod 29
7 is rotated clockwise. Due to this rotation, the nozzle cam 24 rotates counterclockwise until it comes into contact with the stopper pin D, and the nozzle 25 is tilted in the opposite direction with respect to the center line of the wiper arm 22. Therefore, when the wiper arm 22 moves downward, the washer liquid can be injected from the nozzle 25 to a position forward in the direction of movement.

In the device of this example, by appropriately changing the length of the link rod 29, the mounting position of the nozzle cam 24 can be changed toward the distal end of the wiper arm 22. Also, wiper arm 2
The effect of being able to always inject the washer liquid at the forward position in the traveling direction of the second embodiment is the same as in the first embodiment.

(Effects of the invention) The direction switching device for a window washer nozzle of the present invention is mounted on a wiper arm that is supported and driven by a drive shaft and rotates back and forth on the windshield, and the nozzle that injects washer liquid onto the windshield. a nozzle cam provided therein, an intermediate cam pivoted to a wiper arm in proximity to the nozzle cam so as to be able to switch the nozzle direction of the nozzle cam, and rotating the intermediate cam when the wiper arm reaches a rotation end; Since the nozzle of the nozzle cam is configured with an intermediate cam rotating means fixed to the vehicle body side that reverses the nozzle in the direction of movement of the wiper arm, when the wiper arm reaches its rotation end as the wiper arm rotates, the intermediate arm rotates. Since the nozzle cam can be rotated through the nozzle cam and the nozzle can always be reversed in the direction of movement of the wiper arm, the nozzle can always spray the washer liquid to the front position in the direction of movement of the wiper arm. This has the effect of improving the wiping performance of the wiper blade.

[Brief explanation of the drawing]

1 is a side view of a direction switching device for a window washer nozzle showing a first embodiment of the present invention; FIG.
The drawings are a bottom view of FIG. 1, FIG. 3 is a bottom view of a window washer nozzle direction switching device showing a second embodiment of the present invention, and FIG. 4 is a side view showing a conventional example. 1, 21... Drive shaft, 2, 22... Wiper arm, 5, 24... Nozzle cam, 6, 25... Nozzle, 9, 27... Intermediate cam, 11... Fixed cam, 11a, 11b... Connection Stopper, 27a, 27b
...Latching claw, 28...Fixing plate, 29...Link rod, A, B, C, D...Stopper pin.

Claims (1)

[Claims for Utility Model Registration] (1) A nozzle cam that is pivotally attached to a wiper arm that is supported and driven by a drive shaft and rotates back and forth on the windshield, and is equipped with a nozzle that sprays washer liquid onto the windshield, and the nozzle cam. an intermediate cam pivoted to the wiper arm in proximity to the nozzle cam so as to be able to switch the nozzle direction;
an intermediate cam rotating means fixed to the body of the vehicle that rotates the intermediate cam when the wiper arm reaches a rotation end and reverses the nozzle of the nozzle cam in the direction of movement of the wiper arm; A direction switching device for a window washer nozzle. (2) Utility model registration claim 1, in which the intermediate cam rotation means is a fixed cam that is fixed to the body of the automobile and has a locking pawl that comes into contact with the intermediate cam when the wiper arm reaches the rotation end. The direction switching device for the window wash nozzle described above. (3) The intermediate cam rotating means is a link whose one end is rotatably fixed to the body of the automobile and whose other end is rotatably connected to the intermediate cam. The direction switching device for a window washer nozzle according to item 1.