JP2017056751A - Wiper arm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper arm that maintains a constant strength, suppresses cost, and is manufactured by a simple manufacturing process.SOLUTION: The wiper arm 10 includes a hollow tube used as a fluid passage 12 of window washer liquid and supports a wiper blade. The wiper arm includes: a nozzle 16 for jetting the window washer liquid supplied to the fluid passage 12; and reinforcement means for reinforcing the strength of the wiper arm 10. At least the hollow tube is formed by a resin material.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a wiper arm.

  Conventionally, there has been a wiper provided in a vehicle in which a washer hose for passing a window washer liquid (hereinafter simply referred to as “washer liquid”) is fixed to a wiper arm with a clip. Examples of the vehicle provided with such a wiper include a bus and a large truck.

  The clip used to fix the washer hose may shift with use. If the clip slips, the washer hose will sag, the slack hose will vibrate and generate abnormal noise, or the hose may interfere with the wiper arm.

  Thus, as a technique that eliminates the need for a washer hose, for example, a wiper disclosed in Patent Document 1 is known. Patent Document 1 discloses that the inside of a hollow wiper arm is used as a supply path for washer liquid, and the washer liquid is supplied from the storage tank into the primary lever.

Registered Utility Model No. 3008142

  However, the wiper disclosed in Patent Document 1 described above does not specifically disclose what material the wiper arm is made of. Generally, the wiper arm is made of a metal material in order to maintain a certain strength. In this case, the wiper arm is required to be made of a material or a structure that is not easily corroded by the washer liquid, which may increase the cost or complicate the manufacturing process.

  An object of the present disclosure is to provide a wiper arm that maintains a certain strength, suppresses cost, and is manufactured by a simple manufacturing process.

  A wiper arm according to an aspect of the present disclosure includes a hollow tube, and the hollow tube serves as a flow path for window washer liquid, and is a wiper arm that supports a wiper blade, the wiper arm being supplied to the flow path A nozzle for injecting window washer liquid and reinforcing means for reinforcing the strength of the wiper arm are provided, and at least the hollow tube has a configuration formed of a resin material.

  According to the present disclosure, a certain strength can be maintained, the cost can be suppressed, and the manufacturing can be performed by a simple manufacturing process.

Top view showing a wiper arm according to an embodiment of the present disclosure Side view of the wiper arm of FIG. AA line sectional view of FIG. 1 is a bottom perspective view of the wiper arm of FIG. Bottom view of the wiper arm of FIG.

  Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

(Embodiment)
FIG. 1 is a top view illustrating a wiper arm according to an embodiment of the present disclosure. FIG. 2 is a side view of the wiper arm of FIG. FIG. 3 is a cross-sectional view taken along line AA in FIG.

  The wiper arm 10 is connected to the vehicle and supports a wiper blade (not shown). Specifically, one end of the wiper arm 10 is provided with a vehicle connection portion (not shown) that is rotatably connected to the vehicle, and the other end is provided with a blade connection portion (not shown) to which a wiper blade is connected. .

  The wiper arm 10 has a hollow tube and is formed of a resin material. By configuring the wiper arm 10 with a resin material, it is possible to manufacture the wiper arm with a simple manufacturing process as compared with the case where the wiper arm is configured with a metal material, and to reduce the weight of the wiper arm. A rib 14 (corresponding to a reinforcing means) that reinforces the strength of the wiper arm 10 is formed inside the wiper arm 10.

  The hollow tube of the wiper arm 10 is formed by a hollow molding method such as gas injection molding or water injection molding, and serves as a flow path 12 for the washer liquid. Specifically, the molten resin is filled into the mold by injection molding, the resin in contact with the mold is cured, and high pressure gas or water is injected into the uncured resin part away from the mold. , Forming a middle space. In addition, although the cross-sectional shape of the flow path is circular as shown in FIG. 3, it is not limited to a circular shape, and may be an ellipse, a polygon, or the like.

  A pipe 20 is formed at one end of the flow path 12 in the vicinity of the vehicle connection portion. The pipe 20 is connected to a hose, and the hose is connected to a reservoir (not shown) that stores washer fluid. Further, a nozzle 16 for injecting a washer liquid is provided on the other end side of the flow path 12 near the blade connecting portion. The nozzle 16 is formed by drilling.

  As shown in FIGS. 4 and 5, the rib 14 has a bracing (or X-shaped) cross section in the cross section, and the protrusion is provided continuously in the longitudinal direction of the wiper arm 10. It is. More specifically, the rib 14 is provided adjacent to the flow path 12 and continuously in the longitudinal direction along the flow path 12. Thereby, rigidity can be improved, aiming at weight reduction of a wiper arm.

  Next, the flow of the washer liquid will be described. The washer liquid stored in the reservoir is sucked up by a pump and supplied to a hose connecting the reservoir and the wiper arm 10. The washer liquid supplied to the hose passes through the flow path 12 in the wiper arm 10 to which the hose is connected, and is sprayed to the window from the nozzle 16 provided near the front end of the flow path. The washer liquid spreads over the entire window and can wipe off dirt and the like on the window.

  As described above, in the present embodiment, in the wiper arm 10 having a hollow tube and including a resin material, the hollow tube is used as the flow channel 12 for the washer liquid, and the rigidity of the wiper arm 10 is increased by the rib 14. Thus, the cost can be suppressed while maintaining a certain strength, and the manufacturing can be performed by a simple manufacturing process.

  In the present embodiment, the wiper arm 10 is entirely formed of resin, but the present disclosure is not limited to this. For example, in the present disclosure, a part of the hollow tube may be made of resin and the others may be made of metal, and in short, at least the intermediate tube may be made of a resin material.

  The present disclosure is useful for maintaining a certain strength, suppressing the cost, and manufacturing by a simple manufacturing process.

10 Wiper arm 12 Flow path 14 Rib 16 Nozzle 20 Pipe

Claims (3)

A wiper arm having a hollow tube, the hollow tube serving as a flow path for window washer liquid, and supporting a wiper blade;
A nozzle for injecting the window washer liquid supplied to the flow path;
Reinforcing means for reinforcing the strength of the wiper arm;
Comprising
At least the hollow tube is a wiper arm formed of a resin material. The hollow tube is formed by either gas injection molding or water injection molding.
The wiper arm according to claim 1. The reinforcing means is a protrusion whose cross section is a brace, and the protrusion is provided continuously in the longitudinal direction of the wiper arm.
The wiper arm according to claim 1 or 2.

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