JPH0323404Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a wiper for a vehicle, and in particular, the tip of the wiper arm is folded back into a U-shape, and this folded part is connected to a connector rotatably attached to the primary lever of the wiper blade. The present invention relates to a so-called U-hook type vehicle wiper.

An example of this type of vehicle wiper is shown in Japanese Patent Application Publication No. 55-501140. As shown in Fig. 1, a connector 2 is rotatably attached to a primary lever 1 that supports a plaid rubber (not shown) via a pin 3, and a wiper arm 4 (only the tip is shown) has a U-shaped tip. A U-shaped portion (shown) is removably attached to the connector 2.
By making the connector 2 made of synthetic resin, providing a recess (not shown) such as a circumferential groove at the intermediate position of the length of the pin 3, and providing an elastic protrusion (also not shown) in the pin receiving hole of the connector 2. It becomes possible to connect the pin 3 to the connector in a snap-like manner, making it extremely easy to connect the connector and the primary lever, and there is no need for painting repairs after assembly. Note that the wiper arm having the U-shaped tip achieves the same strength and rigidity with a minimum cross-sectional area when viewed in the direction of the driver's field of vision.

In this case, the primary lever and the connector are only connected to each other by the pin 3, and it is desired to provide some means for restricting relative rotational movement.

The present invention satisfies the above needs and limits relative rotational movement by providing a protrusion and an arcuate groove between at least one side of the connector and the inner surface of the primary lever adjacent to that side.

In FIG. 1 of the accompanying drawings showing an embodiment of the present invention, a U-hook type vehicle wiper includes a primary lever 1, a connector 2 rotatably attached to the primary lever 1 by a pin 3, and a U-shaped tip 4a. and a wiper arm 4 releasably connected to the connector 2. Second
3 shows an enlarged view of the connector 2,
The connector 2 has a central portion 2A that receives the U-shaped tip of the wiper arm 4, and a pair of flange portions 2B, 2B located on both sides thereof and having larger dimensions than the central portion 2A. Central part 2A
A hole 2e with a protrusion 2d for receiving the pin 3, and an elastic tongue-like piece 2b for disengaging the wiper arm 4.
and a protrusion 2c, preferably integrated.
The engagement between the connector and the wiper arm 4 is maintained by the projection 2c provided on the elastic tongue 2b of the central portion 2A of the connector 2 engaging with the hole 4b provided in the wiper arm 4. The engagement is released by pushing the shaped piece 2b upward.
The engagement with the pin 3 is through the central circumferential groove 3a of the pin 3.
and a protrusion 2d protruding into the pin receiving hole 2e of the connector 2 are held by elastic engagement. Preferably, the connector 2 is made of synthetic resin having desired elasticity.

As shown in FIGS. 4 to 7, an arcuate groove 5 is provided on the outer surface of one flange portion 2B of the connector 2, and one end thereof continues to the end of the flange portion 2B. A protrusion 6 is provided on the inner surface of the recess 1a and engages with the groove 5. By providing the groove 5 and the protrusion 6, the rotational movement of the wiper arm 4 relative to the primary lever 1 is limited, for example, to the range of the angle α shown in FIG. The groove 5 can be formed at the same time as the connector 2 is formed.

The present invention has a simple configuration that allows the relative rotational movement between the primary lever and the connector to be limited to a predetermined angular range. Therefore, even when the lever is lifted away from the glass surface, the lever remains relative to the wiper arm. It does not rotate excessively and does not cause problems such as damaging the glass surface when returning to the wiping position.

Additionally, the enlarged flange portions on both sides of the connector prevent direct contact between the wiper arm and the primary lever, so that the wiper arm can always operate smoothly relative to the primary lever.
That is, direct metal-to-metal contact between the wiper arm and the primary lever is prevented, and problems such as metal friction noise, metal wear, corrosion, and rust during operation are completely prevented.

In addition, since one end of the groove is continuous to the end of the flange part, it is extremely easy to introduce the protrusion into the groove by guiding the protrusion from the end into the groove. can be assembled quickly and reliably.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the main parts of a U-hook type wiper, Fig. 2 is an enlarged sectional view of the connector, Fig. 3 is a bottom view, and Figs. 4 and 5 are side views of the connector according to the present invention. 6 and 7 are a side view and a top view of the central portion of the primary lever. 1...Primary lever, 2...Connector, 3...
Pin, 4...wiper arm, 4a...U-shaped tip,
5...Arc-shaped groove, 6...Protrusion.

Claims (1)

[Scope of utility model registration request] In a so-called U-hook type vehicle wiper in which the tip of the wiper arm is folded back into a U-shape and connected to a connector rotatably supported via a pin in a connector housing recess of a primary lever of the wiper blade. , the connector has a central portion that receives a U-shaped tip of a wiper arm;
a pair of flange portions that are somewhat larger than the central portion and located on either side of the central portion and located between the wiper arm and the primary lever; and an outer surface of at least one flange of the connector. An arcuate groove whose one end continues to the end of the flange is provided on the primary lever, and a substantially hemispherical projection that engages with the groove is provided on the inside of the primary lever to control relative rotation between the connector and the primary lever. A vehicle wiper characterized by restricted movement.