JPS6332777Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a connection device between a lever and an arm piece in a wiper device for wiping the glass of a vehicle, etc., and particularly relates to a lever that supports a blade rubber and an arm piece that is connected to a wiper motor and rotates. The present invention relates to a connecting device for connecting

A connection device is widely used in which a coupling device, usually called a bayonet clip, is rotatably attached to the lever via a hinge pin, and the tip of the arm piece is inserted into the coupling device. Bayonet clips are usually made by bending a metal plate into a nearly square cross section, then bending part of both legs inward to form claws to prevent the arm piece from moving downwards. A concave-convex fitting part that engages in the vertical direction is provided between the and the arm piece to suppress relative movement in the front-back direction, and a spring or the like is provided to maintain the fitted state of the concave-convex fitting part to prevent the arm piece from moving. It is pressed and held upwards, that is, toward the center of the square shape.
This connecting device has a complicated structure, especially since it uses a spring, and there is a problem in that there is a certain amount of backlash between the arm piece and the clip.

The present invention aims to eliminate the above-mentioned problems of the conventional device. According to the present invention, the bayonet clip has a substantially cross-sectional shape as a whole;
A portion of both legs of the square shape are bent inward to form a substantially rectangular cross section, and a hinge pin receiving hole is provided in a portion of both legs of the square shape that is not bent inward,
Insert the arm piece tip and a holder that engages the tip into the rectangular cross section of the bayonet clip. A connecting device is provided that includes protrusions that engage with each other to inhibit relative movement in the front and rear directions between the bayonet clip and the holder.

Preferably, the holder is made of synthetic resin and is pressed into the bayonet clip with a certain tension when assembled with the arm piece.

With reference to the accompanying drawings showing an embodiment of the invention, the wiper device 1 shown in FIG. (not shown)
and a bayonet clip 5. As shown in FIGS. 2 and 3, the bayonet clip 5 is composed of a central portion 5a and legs 5b, 5b, and has an approximately square cross-section as a whole, with a portion of the legs 5b, 5b being bent inward. The bent portions 5c, 5c move together to form a substantially rectangular cross-sectional portion. Accommodating holes 5e, 5e for the hinge pin 6 are provided in the unbent portions of both legs 5b, 5b. The clip 5 may be formed by bending a metal plate, or may be made of synthetic resin.

As shown in FIG. 4, the holder 7 has approximately the same width as the arm piece 4, is molded from synthetic resin, and has a hole 7a that fits into the protrusion 4a of the arm piece 4.
The upper surfaces of the front and rear ends have protrusions 7b and 7c, respectively. Preferably, the lower surface has a protrusion 7d, and the protrusion 4
When the arm piece 4 and the holder 7 are in an overlapping relationship by fitting into the hole 7a, the protrusion 7d contacts the tip 4b of the arm piece 4 to reliably prevent relative movement between the two. In the assembled state shown in FIG. 2, the protrusions 7b and 7c of the holder 7 engage with the front and rear ends 5f and 5g of the central portion 5a of the clip 5, respectively, to prevent relative movement. In the illustrated embodiment, the holder 7 has a shape bent upward along a line 7e in its normal state, and is elastically forced into a flat shape in an assembled state, thereby reliably preventing it from falling off.

At the time of assembly, the arm piece 4 and holder 7 are combined and inserted into the rectangular cross section of the clip 5. By appropriately determining the thickness of the holder 7, play in the rectangular cross-sectional portion can be eliminated, and reliable retention between the arm piece 4 and the clip 5 can be achieved.
The protrusions 7b and 7c also prevent relative movement in the front-back direction of the insertion direction. At the time of extraction, the arm piece 4 can be extracted together with the holder 7 by pushing down the protrusion 7b.

The protrusion 7b and the front end 5 of the central portion 5a of the clip 5
It is also possible to provide an appropriate uneven engagement portion between the groove and f.

According to the present invention, a reliable insertion connection without play between the bayonet clip 5 and the arm piece 4 is achieved, and noise during operation is eliminated.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a wiper device equipped with the connecting device of the present invention. Figure 2 is a partially enlarged view of Figure 1. FIG. 3 is a rear view of the bayonet clip as seen in the direction of the arrow in FIG. FIG. 4 is an exploded perspective view of the holder and arm piece. 2... Lever, 4... Arm piece, 5... Bayonet clip, 6... Hinge pin, 7... Holder, 5a... Center part, 5b... Leg, 5c... Bent part, 5e... Hinge pin Accommodation holes, 7b, 7c...
...Protrusion, 5f, 5g... Front and rear ends of central part, 4a,
7a... Concave-convex fitting part.

Claims (1)

[Scope of utility model registration request] In a connecting device for removably inserting and connecting an arm piece tip portion having a substantially rectangular cross section to a bayonet clip rotatably connected to a lever, the bayonet clip as a whole has a substantially square cross section, and Parts of both legs are bent inward to form a substantially rectangular cross section, and hinge pin receiving holes are provided in the portions of the rectangular legs that are not bent inward, and the rectangular cross section of the bayonet clip is formed. Insert the tip of the arm piece and a holder that engages the tip into the shape, and attach bayonet clips to the upper surfaces of the front and rear ends of the holder in the insertion direction, engaging with the front and rear ends of the central part of the square shape, respectively. The connection device is characterized in that it is provided with a protrusion that suppresses relative movement in the front and rear direction between the holder and the holder.