JP2655897B2 - Wiper - Google Patents

Description

The present invention relates to a wiper in which a nozzle is driven in synchronization with a reciprocating motion of a wiper blade, and a cleaning liquid is sprayed from the nozzle onto a front wind surface of the wiper blade in the traveling direction. About.

(Description of the Related Art) A wiper of a vehicle or the like wipes dirt on a wind surface by reciprocating a wiper blade on a wind surface, and a nozzle for wiping a cleaning liquid onto the wind surface to effectively wipe dirt is provided. It is installed. Such a wiper,
In general, the nozzle is arranged so as to be directed to the center of the area to be wiped by the wiper blade, and the cleaning liquid is blown out from the nozzle in a fan shape and sprayed onto the window surface.

By the way, the wiper has a significantly different coefficient of friction between the wind surface and the wiper blade depending on whether the wind surface is wet or dry, and when the wiper blade shifts from a portion wet with the cleaning liquid to a dry portion, abrasion is caused on the wind surface. There was something. In particular, in the case of a front window made of a low-hardness material such as a synthetic resin, which has been proposed in recent vehicles, the above-mentioned drawbacks have been remarkable.

Therefore, a wiper for preventing abrasion has been proposed in JP-A-63-97452.
This wiper has nozzles attached to both sides of the wiper arm, and a cleaning liquid is selectively ejected from one of the nozzles in accordance with the traveling direction of the wiper blade, so that the cleaning liquid blows the cleaning liquid forward in the traveling direction of the wiper blade. Is sprayed on.

(Problems to be Solved by the Invention) However, in the above-mentioned wiper disclosed in Japanese Patent Application Laid-Open No. 63-97452, two nozzles must be arranged in parallel to the wiper arm, so that the wiper arm becomes large.
Fluid control devices such as a solenoid valve and a control circuit that control the flow of the washing water in synchronization with the swinging of the wiper arm are indispensable, resulting in an increase in cost.

The present invention has been made in view of the above problems, and has as its object to provide a wiper capable of preventing abrasion on a wind surface without increasing the size of a wiper arm and at a low cost.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a wiper blade that is applied to a window surface on which a cleaning liquid is sprayed by a nozzle,
The wiper blade is attached to a wiper shaft via a wiper arm, and the wiper shaft is rotated forward and reverse to attach a sleeve rotatable relative to the wiper shaft concentrically to the wiper shaft. By attaching the nozzle to the sleeve and performing synchronous operation with the wiper blade while preceding the wiper blade in both forward and reverse rotation, the wiper blade can be moved forward or backward. The wiper is characterized in that the cleaning liquid is sprayed from the nozzle toward the front in the traveling direction of the wiper blade.

(Operation) Since the nozzle for ejecting the cleaning liquid when the wiper blade reciprocates and the nozzle for ejecting the wiper when returning can be shared, the number of nozzles may be small.

Regardless of whether the wiper blade is moving forward or backward, the wind surface is only wet in the forward direction of the wiper blade with the cleaning liquid, and the wiper blade always wipes the wind surface wet with the cleaning liquid. I do. As a result, the wind surface can be sufficiently cleaned and wiped without damaging the wind surface and the wiper blade, and further, no excessive cleaning liquid is jetted.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 show a wiper according to an embodiment of the present invention. FIG. 1 is a schematic side view, FIG. 2 is a schematic view of a driving mechanism, and FIG. 3 is an operation explanatory view.

In the figure, reference numeral 11 denotes a wiper arm.
The base end is attached to a wiper shaft 12 protruding outside the vehicle body B, and is driven by a motor described later to swing. A wiper blade 13 is supported at the tip of the wiper arm 11, and the wiper blade 13 is in slidable contact with the wind surface of the windshield G. The wiper blade 13 wipes a wind surface reciprocating on the wind surface with the swing of the wiper arm 11.

As shown in detail in FIG. 2, the wiper shaft 12 is coaxially and rotatably inserted into a sleeve 14 which will be described later, and penetrates the vehicle body B together with the sleeve 14 to protrude outside the vehicle body B. The wiper shaft 12 has a base end of the wiper arm 11 attached to an outer end outside the vehicle body B, and an arm 12a integrally formed at an inner end inside the vehicle body B, and the arm 12a is connected to a crank type link mechanism 15. And is connected to the output shaft of the motor 16 via. The wiper shaft 12 is driven by a motor 16 via a link mechanism 15 and reciprocates in a specified angle range. The sleeve 14 rotatably penetrates the vehicle body B, and a nozzle 17 for jetting a cleaning liquid is provided on an outer peripheral portion outside the vehicle body B,
An arm 14a is integrally formed at an end in the vehicle body B, and the arm 14a is connected to an output shaft of a motor 19 via a crank type link mechanism 18. This sleeve 14 has a link mechanism
The wiper shaft 12 is driven in synchronization with the wiper shaft 12 by a motor 19 via 18, and reciprocates in a range substantially the same as the range of rotation of the wiper shaft 12.

The nozzle 17 is, as schematically shown in FIG.
Is connected to the discharge port of the cleaning liquid pump 21 by the hose 20. The pump 21 has a suction port connected to a reservoir tank 22 for cleaning liquid, and pressurizes and discharges the cleaning liquid in the reservoir tank 22.

Thus, the wiper is, as shown in FIGS.
A wiper shaft 12 is mounted concentrically with a sleeve 14 which is rotatable relative to the wiper shaft 12, a nozzle 17 is mounted on the sleeve 14, and the wiper blade 13
It is designed to operate synchronously with 13. Accordingly, the wiper is configured to spray the cleaning liquid forward from the nozzle 17 in the traveling direction of the wiper blade 13 regardless of whether the wiper blade 13 is moving forward or backward.

In the wiper of this embodiment, the wiper arm 11 is driven by a motor 16 and swings around a wiper shaft 12, and the swing of the wiper arm 11 causes the wiper blade 13 to reciprocate on the wind surface, thereby causing the wind surface to move. To dispel. Then, the sleeve 14 reciprocates in synchronization with the wiper arm 11,
The nozzle 17 swings ahead of the wiper blade 13 with a phase difference. The phase of the nozzle 17 is greatly advanced particularly at the time of inversion.

As shown in FIG. 3, such a nozzle 17 sprays a cleaning liquid toward a portion of the wiper blade 13 which is to be wiped from the front of the wiper blade 13 in the traveling direction.

In other words, the nozzle 17 can be operated synchronously with the wiper blade 13 ahead of the wiper blade 13 in both forward and reverse rotations. For this reason, the wiper blade 13
In either case, the nozzle 17 moves forward or backward.
The cleaning liquid is sprayed forward in the traveling direction of the wiper blade 13. Therefore, the wind surface can be constantly wiped in a wet state, and it is possible to prevent the abrasion on the wind surface,
In addition, vibration that causes noise can be prevented.

On the other hand, the wiper of this embodiment
The sleeve 14 is driven by a motor 19 via a link mechanism 18 in synchronization with the wiper blade 13 to
From 17, the cleaning liquid is sprayed on the front portion of the wind surface in the traveling direction of the wiper blade 13. For this reason, a fluid device for controlling the flow of the cleaning liquid is not required, so that the cost can be reduced and the wiper arm 11 can be prevented from being enlarged.

In the above-described embodiment, the motor 14 for driving the sleeve 14 and the motor 11 for driving the wiper arm are provided.
It is also possible to drive both the wiper arm 4 and the wiper arm 11, and it is also possible to directly drill the nozzle 17 in the sleeve 14. Further, the number of the nozzles 17 is not limited to one. Number of nozzles or multiple nozzle outlets, one blows near the nozzle of the blade,
In other cases, the jetting portion may be shared by several nozzles, such as blowing the nozzle far from the nozzle, so that the cleaning liquid spreads over the entire blade.

(Effects of the Invention) As described in detail above, the present invention attaches a sleeve rotatable relative to the wiper shaft to the wiper shaft, attaches a nozzle to the sleeve, and rotates the nozzle in both forward and reverse rotations. By performing synchronous operation with the wiper blade ahead of the blade, the cleaning liquid is sprayed forward from the nozzle in the forward direction of the wiper blade regardless of the forward or backward movement of the wiper blade. Therefore, the nozzle that ejects the cleaning liquid when the wiper blade moves forward and the nozzle that ejects the cleaning liquid when returning the wiper blade can be used in common.

For this reason, the number of nozzles for injecting the cleaning liquid is small, a complicated control device for controlling the timing of jetting the cleaning liquid is not required, and the size of the wiper arm is not increased and the cost is reduced.

Further, regardless of whether the wiper blade is moving forward or backward, the cleaning liquid is sprayed forward from the nozzle in the direction of travel of the wiper blade. It can be wiped off in a wet state. As a result, with a simple configuration,
The wind surface can be sufficiently cleaned and wiped without damaging the wind surface and the wiper blade.
There is no ejection of excess cleaning liquid.

[Brief description of the drawings]

1 to 3 show a wiper according to an embodiment of the present invention. FIG. 1 is a schematic side view, FIG. 2 is an enlarged side view of a main part, and FIG. 3 is a front view for explaining operation. It is. 11 Wiper arm, 12 Wiper shaft 13 Wiper blade, 14 Sleeve 15 Link mechanism, 16 Motor 17 Nozzle, 18 Link mechanism 19 Motor

Claims (1)

(57) [Claims] 1. A wiper for wiping a wind surface by applying a wiper blade to a wind surface onto which a cleaning liquid has been sprayed by a nozzle, attaching the wiper blade to a wiper shaft via a wiper arm, and rotating the wiper shaft forward and reverse. A sleeve rotatable relative to the wiper shaft is mounted concentrically on the wiper shaft, the nozzle is mounted on the sleeve, and the nozzle is operated synchronously with the wiper blade while preceding the wiper blade in both forward and reverse rotations. With this configuration, the wiper is configured to spray the cleaning liquid forward from the nozzle in the traveling direction of the wiper blade regardless of whether the wiper blade is moving forward or backward.