JPS6332772Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a wiper arm in a wiper device for wiping windshield glass in automobiles, ships, railway vehicles, etc.

As shown in FIGS. 1 and 2, the wiper arm in this type of wiper device includes an arm head 2 whose base end 2A is swingably attached to a pivot shaft 1, and a wiper blade 3 supported on the distal end side. , a retainer 6 attached to the tip of the arm head 2 at its base end via a swing shaft 4 so as to be swingable in a plane substantially perpendicular to the windshield glass surface 5 to be contacted by the wiper blade 3; a spring guide pivotably supported by a swing shaft 7 in substantially the same plane as the retainer 6 at a position offset from the swing shaft 4 in a direction away from the windshield glass surface 5; 8, mounted between the spring guide 8 and the retainer 6,
Some devices include a compression coil spring 9 that biases the tip side of the retainer 6 in a direction to press it against the windshield glass surface 5.

Reference numeral 10 in the figure indicates a guide bar that is integral with the spring guide 8 and projects through the center of the compression coil spring 9 in the longitudinal direction. The protruding end further protrudes from the through hole 12 of the stopper 11 that constitutes a spring receiver at the end of the compression coil spring 9 opposite to the spring guide 8, and thereby engages with the retainer 6 in the rotational direction via the stopper 11. has been done. Further, reference numeral 13 in the figure indicates a rivet for fixing the stopper 11 to the retainer 6.

The portion beyond the retainer 6 is designed to be able to rise up against the arm head 2, that is, lock back, for convenience when replacing the wiper blade 3, etc.

In the wiper arm using the conventional compression coil spring 9 as described above, the spring receivers 8A and 8B of the spring guide 8 for receiving the compression coil spring 9 must protrude outward from the center. In FIG. 2, the portion 8A protrudes upward, increasing the thickness of the wiper arm in the vicinity of the swing axis 4.

In addition, in order to ensure the pressing force of the wiper blade 3 against the windshield glass surface 5 by the compression coil spring 9, the amount of offset of the swing axis of the spring guide 8 with respect to the swing axis 4 of the retainer 6 is increased. Therefore, this also increases the thickness of the wiper arm in the vicinity of the swing axis 4.

Additionally, if the wiper arm is a so-called concealed type that is stored in the gap between the rear end of the front hood and the windshield glass when not in use, the wiper arm is stored in the narrow gap between the wiper arm and the windshield. Since it is difficult to store thick wiper arms, conventional wiper arms have been forced to be installed with thin, non-lockable wiper arms.

This invention was made in view of the above-mentioned conventional problems, and the purpose is to provide a wiper arm that is thin and that can ensure sufficient pressing force of the wiper blade against the windshield glass surface. do.

Another object of this invention is to provide a wiper arm that is thin and can be applied to a concealed type wiper without sacrificing the lockback function.

This invention consists of an arm head whose base end is attached to a swingable pivot shaft, a wiper blade supported on the distal end side, and a swing shaft at the distal end of the arm head at the base end to prevent the wind to be wiped by the wiper blade. a retainer mounted to be swingable in a plane substantially perpendicular to the shield glass surface; and a retainer mounted at a position offset from the swing axis of the arm head in a direction away from the windshield glass surface. A spring guide is pivotally supported by a swing shaft so as to be swingable in the same plane, and the spring guide is mounted between the spring guide and the retainer, and is biased in a direction to press the tip side of the retainer against the windshield glass surface. In the wiper arm, the compression coil spring has a curved cylindrical shape in a free state and is mounted between the spring guide and the retainer in a substantially straight cylindrical shape, so that the center line of action is The above object is achieved by passing through the spring guide swing axis or a position farther from the windshield glass surface than this.

Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, parts that are the same as or corresponding to the conventional wiper arm shown in FIGS. 1 and 2 are given the same reference numerals as in FIGS. 1 and 2, and their explanation will be omitted. .

In this embodiment, as shown in FIGS. 3 to 5, a proximal end 2 is attached to a swingable pivot shaft 1.
A is attached to the arm head 2, the wiper blade 3 is supported on the distal end side, and a swing shaft 4 is attached to the distal end of the arm head 2 at the proximal end.
a retainer 6 swingably mounted in a plane substantially perpendicular to the windshield glass surface 5 to be wiped by the wiper blade 3; and the arm head 2.
a spring pivotably supported by a swing shaft 7 in substantially the same plane as the retainer 6 at a position offset from the swing shaft 4 in a direction away from the windshield glass surface 5; Guide 8
and a compression coil spring 9 that is mounted between the spring guide 8 and the retainer 6 and biases the front end side of the retainer 6 in a direction to press the windshield glass surface 5. The spring 9 has a curved cylindrical shape in the free state (see FIG. 3), and is mounted between the spring guide 8 and the retainer 6 in a substantially straight cylindrical shape, so that the center line of action 9A is aligned with the spring guide 8. It passes through the swing axis 7 or a position farther from the windshield glass surface 5 than this.

Further, in the stopper 11, a slit 1 is formed continuously from the bottom side in FIG.
1A is formed, whereby the guide bar 10
is able to swing within the slit 11A around the swing shaft 7.

Furthermore, the guide bar 1 is attached to the retainer 6.
A support member 14 is provided that comes into contact with the tip of the guide bar 10 protruding from the stopper 11 and restricts the swinging of the guide bar 10 in the direction of the windshield glass surface 5 beyond a certain level.

The support member 14 indirectly supports the end of the compression coil spring 9 on the retainer 6 side via the stopper 11 at a position between the two opposing pieces 6A and 6B of the U-shaped cross section of the retainer 6. It is said to be a rivet made possible.

The center axis of the guide bar 10 is offset toward the windshield glass surface 5 side with respect to the swing axis 7 of the spring guide 8, as shown in the figure. The amount of upward protrusion is assumed to be zero.

Next, the operation of the above embodiment will be explained.

When the wiper blade 3 is in contact with the windshield glass surface 5, the compression coil spring 9 has a force that causes its both ends to extend in the direction of separating them,
This force is supported by the spring guide 8 and the stopper 11.

Since the spring guide 8 is supported by the swing shaft 7, one end of the restoring force of the compression coil spring 9 is applied to the arm head 2, and the other end is applied to the retainer 6 via a stopper 11 and/or a rivet 13. It will be accepted by the side.

Since the swing shaft 7 of the spring guide 8 is offset from the swing shaft 4 of the retainer 6, the force of the compression coil spring 9 causes the retainer 6 to move clockwise relative to the arm head 2 in FIG. This moment presses the wiper blade 3 attached to the piece arm 15 at the tip of the retainer 6 against the windshield glass surface 5.

Here, the action center line 9 of the compression coil spring 9
Does A pass through the swing shaft 7 of the spring guide 8?
Or, because it is shifted away from the windshield glass surface 5, the shape center line 9B of the compression coil spring 9 is moved closer to the windshield glass surface 5 than in the conventional wiper arm shown in FIG. It can be installed close to. For this reason, the shape center line 9 of the compression coil spring 9
The guide bar 10 sharing B can be arranged closer to the windshield glass surface 5 than the swing axis 7 of the spring guide 8.

Therefore, in this embodiment, the spring guide 8
Since the spring receivers 8A and 8B are offset from the center of the spring guide 8 toward the windshield glass surface side, the spring receivers 8A and 8B are more compact than the conventional wiper arm shown in FIG.
There is almost no upward protrusion in the figure, and the spring part 8B
Only the wiper arm protrudes downward, and the thickness of the wiper arm near the spring receiving portions 8A and 8B can be reduced.

Since the present invention is configured as described above, by offsetting the guide bar of the spring guide and shifting the spring receiving portion of the compression coil spring toward the windshield glass surface, the portion of the wiper arm near the spring receiving portion can be made thinner. Therefore, it has the excellent effect of making the entire wiper arm thinner.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing a conventional wiper arm, Figure 2 is an enlarged sectional view taken along the - line in Figure 1, and Figure 3 is a perspective view showing a conventional wiper arm.
The figure is a front view showing a compression coil spring in an embodiment of the wiper arm according to the present invention, FIG. 4 is a sectional view similar to FIG. 2 showing the same embodiment, and FIG. 5 is a bottom view of the same embodiment. 1... Pivot shaft, 2... Arm head, 2A... Base end, 3... Wiper blade, 4...
...Rotating axis, 5...Windshield glass surface, 6
... Retainer, 7 ... Swing shaft, 8 ... Spring guide, 9 ... Compression coil spring, 9A ... Center line of action, 10 ... Guide bar, 11 ... Stopper.

Claims (1)

[Scope of utility model registration request] An arm head whose base end is attached to a swingable pivot shaft, a wiper blade supported on the distal end side, and a swing shaft at the distal end of the arm head at the base end, and a windshield glass surface to be wiped by the wiper blade. a retainer mounted so as to be able to swing freely within a substantially right-angled plane;
a spring guide pivotably supported by a swing shaft in substantially the same plane as the retainer at a position offset from the swing shaft of the arm head in a direction away from the windshield glass surface; A wiper arm comprising: a compression coil spring mounted between the spring guide and the retainer and biasing the tip end of the retainer in a direction to press the windshield glass surface;
The compression coil spring has a curved cylindrical shape in a free state, and is mounted between the spring guide and the retainer in a substantially straight cylindrical shape, so that the center line of action is aligned with the spring guide swing axis or with the windshield. A wiper arm that is characterized by passing through a position far from the glass surface.