JPS629B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a windscreen wiper for wiping the windscreen of an automobile or the like.

[Prior art and its problems] In the conventional windscreen wiper,
The wiper arm is fixed to a connecting member, which is rotatably attached to a pivot pin installed between the side walls of the main yoke. In this conventional windscreen wiper, the wiper arm is arranged above the yoke of the wiper blade. In this way, when the wiper arm is attached to the center of the main yoke, the guide between the wiper arm and the wiper blade is long and stable, so pitching and twisting moment of the wiper blade can be reliably suppressed. I can do it.

However, in this windscreen wiper, since the wiper arm is disposed above the yoke, there is a problem that the wiper blade floats during high-speed operation.

On the other hand, windscreen wipers are also known in which a pivot pin projects laterally from the wiper blade and a wiper arm is attached to the pivot pin. In this windscreen wiper, the wiper arm extends laterally of the wiper blade in an imaginary plane that passes through the pivot pin axis and extends in the longitudinal direction of the wiper blade. This windscreen wiper is preferred for stylistic reasons and has the advantage that the overall low height of the wiper arm prevents the wiper blade from moving away from the glass surface being wiped during high speed operation.

However, in this windscreen wiper, the wiper blade is attached laterally to the wiper arm, so when the wiper is driven, a torsional moment acts on the wiper blade, which adds unnecessary load and reduces safety and reliability. There is a problem with sexuality.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a windscreen wiper that prevents the wiper blade from lifting during high-speed operation and allows the wiper arm to support the wiper blade reliably and safely. purpose.

[Means for Solving the Problems] A windscreen wiper according to the first invention of this application includes a main yoke having a nearly U-shaped cross section and having a pair of side walls and a back wall in which an opening is formed; In a windscreen wiper comprising a wiper blade having a pivot pin supported between side walls, a wiper arm projecting upwardly from the opening, and a connecting member rotatably attaching the wiper arm to the pivot pin, the wiper arm 20 includes: a first lateral bend 21 which bends laterally substantially parallel to the windscreen at a predetermined distance from the pivot pin 15; The wiper arm 20 has a first vertical bent portion 24 that bends downward toward the windscreen, the first lateral bent portion 21 begins to bend from the edge 19 of the opening 14 in the back wall 13 of the main yoke 10, and the wiper arm 20 has a At least a portion 26 thereof is on the side of the wiper blade and extends in the longitudinal direction of the main yoke 10 through the axis of the pivot pin 15.
It is characterized by extending at a position closer to the windscreen than the windscreen.

Further, a windscreen wiper according to a second invention of this application includes a main yoke having a nearly U-shaped cross section and having a pair of side walls and a back wall in which an opening is formed, and a pivot pin supported between the side walls. , a windscreen wiper comprising a wiper blade having a wiper arm, a connecting member attached to the pivot pin, and an adapter member fixed to the wiper arm, the connecting member 30 is connected to the opening of the main yoke 10. protrudes above the back wall, then protrudes to the side beyond one side wall 11 of the main yoke 10, extends downward from the side of this side wall 11 toward the windscreen, and is connected to the adapter member 35; The wiper arm 20 is characterized in that at least a portion 26 thereof extends on the side of the wiper blade at a position closer to the windscreen than a virtual plane E that passes through the axis of the pivot pin 15 and extends in the longitudinal direction of the main yoke 10. do.

[Operation] According to the present invention, the wiper arm is attached to the pivot pin supported between the side walls of the yoke via the connecting member. Therefore, when the wiper is driven, the wiper blade is reliably guided without any play in the lateral direction perpendicular to its longitudinal direction.
Pitting moments about the longitudinal axis of the wiper blade and torsional moments about an axis extending perpendicular to the glass surface to be wiped can be reduced. Since the wiper arm is attached to the center of the yoke in this manner, the wiper arm supports the wiper blade safely and reliably.

On the other hand, by deforming the wiper arm as in claim 1, or by deforming the connecting member as in claim 5, the wiper arm can be made to have at least a portion thereof Extend at a position closer to the windscreen than the back wall of the yoke. This prevents the wiper arm from lifting during high-speed operation.
In addition, since the wiper arm is located close to the windscreen, even if a torsional moment is applied to the wiper arm due to sliding friction between the wiper blade and the windscreen, the
The twisting moment relative to the wiper arm is smaller than when the wiper arm is connected above the yoke and extends linearly as it is and is located at a position farther from the windscreen.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 and 2 are a side sectional view and a plan view, respectively, of a windscreen wiper according to a first embodiment of the present invention. The wiper blade yoke 10 has a pair of parallel side walls 11,
12 and a back wall 13 in which an opening 14 is formed. A pivot pin 15 is attached between the side walls 11 and 12 at the location of the opening 14.

The wiper arm 20 has a hook-shaped end at its tip. A known two-pronged locking spring 16 functions as a connecting member for attaching the wiper arm 20 to the pivot pin 15, and the spring 16 is disposed between the hook-shaped end of the wiper arm 20 and the pivot pin 15, so that the wiper arm 20 is attached to the pivot pin 1.
It is rotatably attached to 5. A detent 18 is formed on one leg 17 of the spring 16.

In this way, by centrally mounting the wiper arm 20 between the side walls of the main yoke 10,
When the wiper is driven, it is guided reliably without any lateral play, reducing the pitching moments of the wiper blade about its longitudinal axis and its torsional moments about an axis extending perpendicular to the glass surface to be wiped. .

The wiper arm 20 projects above the back wall 13 through an opening 14 in the main yoke 10 and from an edge 19 of this opening 14 bends laterally substantially parallel to the windscreen into a first lateral bend 21 . form. Portion 2 following this first lateral bending portion 21
3 is 90 with respect to the longitudinal axis A of the wiper blade
tilt at an angle α less than 1°. Adjacent to this section 23, a second transverse bend 22 is formed, by means of which at least a section 26 of the wiper arm 20 extends parallel to the wiper blade.

Furthermore, the wiper arm 20 is connected to the main yoke 10.
It has a first vertical bent portion 24 that bends downward toward the windscreen at a position outside the upper region of the windscreen. Note that the bent portions 22 and 24 partially overlap, which is advantageous in terms of functional efficiency.

Further, the wiper arm 20 has a second vertically bent portion 2
5, so that the portion 26 extends parallel to the glass surface to be wiped. The position and degree of bending of the vertical bent portions 24 and 25 are determined by the wiper arm portion 26.
passes through the pivot pin axis and extends in the longitudinal direction of the wiper blade.
It is adjusted so that it is located at the same distance.

The portion between the bent portions 24 and 25 is inclined with respect to the virtual plane E at an angle β smaller than 90 degrees.
Although it is possible to make the angles α and β 90 degrees,
There are manufacturing difficulties. It is also preferred for stylistic reasons that the wiper arm be constructed relatively smoothly.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 to 5. FIG. 3 is a side sectional view, FIG. 4 is a front sectional view, and FIG. 5 is a plan view. The connecting member 30 has a clip-like leg portion 3.
2 and 33, and by sandwiching the pivot pin 15 between the legs 32 and 33, the connecting member 30 is rotatably attached to the pivot pin 15. An insertion groove 36 with one end closed is formed inside the adapter member 35, and the tip of the wiper arm 20 is inserted into this insertion groove 36 to remove the wiper arm 20.
Adapter member 35 is fixed to. In this case, by making the inner wall of the insertion groove 36 elastic,
The wiper arm 20 can be firmly fixed.

The connecting member 30 connects to the opening 14 of the main yoke 10.
It protrudes above the back wall 13 from above, and extends downward by a web 34 from a position on the base end side of the wiper arm 20 in this upper portion, over the side wall 11. That is, the connecting member 30 extends downward from one side wall 11 of the main yoke 10 toward the windscreen, and the adapter member 35
Connect with.

As a result, the wiper arm 20 is connected to the yoke 10.
It extends to the pivot base end at a position below a plane passing through the back wall 13 of the wiper blade and below an imaginary plane E passing through the pivot pin axis and extending in the longitudinal direction of the wiper blade. Further, the distal end of the wiper arm 20 ends at a position closer to the rotation base end of the wiper arm 20 than the pivot pin 15.

Also in this embodiment, the wiper arm 20 is attached to the center between the side walls of the main yoke 10 via the connecting member 30, and the wiper arm 20 extends at a lower position on the side of the yoke 10.
On the other hand, in the embodiments shown in FIGS. 1 and 2, this was made possible by bending the wiper arm 20, but in this embodiment, this was made possible by bending the connecting member 30. However, the same effects as the embodiments of FIGS. 1 and 2 are achieved.

[Effects of the Invention] According to the present invention, since the wiper arm supports the wiper blade from above at the center between the side walls of the main yoke, the wiper blade is supported reliably and safely, and at least a portion of the wiper arm is supported by the yoke. Since the side walls are extended laterally, the overall height of the wiper arm is lowered and it is prevented from lifting during high-speed operation.

[Brief explanation of the drawing]

1 and 2 are diagrams showing a first embodiment of the invention, and FIGS. 3 to 5 are diagrams showing a second embodiment of the invention. 10... Yoke, 11, 12... Side wall, 13...
... Back wall, 20 ... Wiper arm, 21, 22, 2
4, 25...Bending portion, 30...Connection member, 35...
...Adapter member, 36...Insertion groove.

Claims (1)

[Scope of Claims] 1. A main yoke having a nearly U-shaped cross section and having a pair of side walls and a back wall in which an opening is formed, a pivot pin supported between the side walls, and a pivot pin protruding upward from the opening. In a windscreen wiper having a wiper blade having a wiper arm and a connecting member rotatably attaching the wiper arm to the pivot pin, the wiper arm 20 is substantially attached to the windscreen at a predetermined distance from the pivot pin 15. a first lateral bent part 21 that bends in the lateral direction parallel to , and a first vertical bent part 24 that bends downward toward the windscreen at a position farther from the pivot pin 15 than the first lateral bent part 21 . The first lateral bending portion 21 has an opening 1 in the back wall 13 of the main yoke 10.
The wiper arm 20 starts to bend from the edge 19 of 4.
is characterized in that at least a portion 26 thereof extends at a position closer to the windscreen than an imaginary plane E that is on the side of the wiper blade and extends in the longitudinal direction of the main yoke 10 through the axis of the pivot pin 15. screen wiper. 2 The wiper arm 20 has a second lateral bent part 22 that bends in the opposite direction to the first lateral bent part 21, and
and the wiper arm portion 23 between the second lateral bending portion.
Windscreen wiper according to claim 1, characterized in that the wiper arm intersects the longitudinal axis of the wiper blade at an angle α of less than 90 degrees and extends parallel to the wiper blade in at least a part thereof. 3 The wiper arm 20 has a second vertically bent portion 25 that bends in the opposite direction to the first vertically bent portion 24;
and the wiper arm portion between the second longitudinal bends intersects the longitudinal axis of the wiper blade at an angle β of less than 90 degrees, and the wiper arm extends with at least a portion thereof parallel to the windscreen to be wiped. A windscreen wiper according to claim 1. 4. The wiper arm 20 has a hook-shaped end, and a two-pronged locking spring 16 is fixed to the inside of this end, and this spring 16 is rotatably attached to the pivot pin 15. A windscreen wiper according to any one of claims 1 to 3. 5. A main yoke with a nearly U-shaped cross section having a pair of side walls and a back wall in which an opening is formed, a pivot pin supported between the side walls, a wiper arm, and a connecting member attached to the pivot pin. and an adapter member fixed to the wiper arm, the connecting member 30 includes:
It protrudes from the opening of the main yoke 10 above its back wall, and then one side wall 1 of the main yoke 10
The wiper arm 20 protrudes laterally beyond the sidewall 11, extends downwardly toward the windscreen on the side of the sidewall 11, and is connected to the adapter member 35.
A windscreen wiper characterized in that at least a portion 26 thereof extends on the side of the wiper blade at a position closer to the windscreen than an imaginary plane E passing through the axis of the pivot pin 15 and extending in the longitudinal direction of the main yoke 10. . 6 the adapter member 35 is located closer to the proximal end of the wiper arm 20 than the pivot pin 15;
6. The windscreen wiper according to claim 5, wherein the tip of the wiper arm 20 is located a predetermined distance closer to the proximal end of the wiper arm than the pivot pin 15. 7. The windscreen wiper according to claim 5 or 6, wherein the adapter member 35 has an insertion groove 36 extending in the longitudinal direction of the wiper blade and into which the wiper arm 20 is inserted.