JPH0120094B2 - - Google Patents

Description

Claim 1 (a) A head fixed to the output shaft of the drive mechanism;
(b) One end has a connecting means to be connected to the wiper fixture, the other end has an arm mechanically connected to the head via a housing, and (c) is connected to the axis of the output shaft. A cylindrical joint provided between the head and the housing along a transverse axis, in a region perpendicular to the head 4, the housing 1 is connected in a known manner to the head 4. a movable cover 9 is provided which is formed from only two mutually parallel wing sections 2a, 2b placed between them and is able to cover said area, supporting a helical compression spring on the one hand at point R on said head; on the other hand supported on the housing;
In a wiper element designed to connect the output shaft of the drive mechanism and the mounting of the wiper, a cylindrical joint of the housing 1 on the head 4 including the axis 5 of the output shaft of the drive mechanism In the plane perpendicular to the axis 3, the point R is
wiper arm 11 relative to the axis 5 of the output shaft;
A wiper element characterized in that the wiper element is located on the same side as and opposite to the trace of the joint axis 3 of the housing 1 on the head 4.

2 the covers 9 are interconnected by a web portion 9c which encloses each wing portion 2a, 2b of the housing 1 between them and which covers an area of the housing 1 perpendicular to the head 4 when the cover is lowered; The wiper element according to claim 1, characterized in that it is formed by two mutually parallel blade portions 9a, 9b.

3. The cover 9 is pivotally attached to the housing 1 by two protrusions 10 that protrude from the lower surface of each wing portion 9a, 9b of the cover 9 and are associated with each hole in the housing 1, which acts as a journal bearing.
The second claim characterized in that
Wiper element as described in section.

4. Claims 1 to 3, characterized in that the two protrusions are arranged at right angles in areas where the respective wing portions 9a, 9b of the cover are not connected to each other by the web portion 9c. The wiper element described in any of the above.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper element that connects an output shaft of a drive mechanism and a wiper attachment. More particularly, the invention relates to wipers for motor vehicles.

It is well known that when it is desired to maintain good visibility through glass surfaces that are subject to splashes such as water, these surfaces must be subjected to the action of a wiper, which generally performs a reciprocating cleaning motion. The action of the wiper on the glass surface to be cleaned is carried out by the wiper blade being driven by an electric mechanism via a wiper element which provides a mechanical connection between the wiper blade and the drive mechanism. More specifically, the drive mechanism generally includes a rotating shaft having an assembly head pivotally connected to a housing fixed to the wiper arm by a cylindrical joint. By inserting an elastic body between the housing and the assembly head, the wiper
The blade rests resiliently on the surface to be cleaned. The elastic body is generally a coil spring that can be actuated by tension or compression. The invention relates in particular to wiper elements using compression-actuated springs as described in French Patent Application No. 79-19195 of July 25, 1979 (F. Pat. No. 2,642,312). .

In the above-mentioned French Patent Application No. 79-19195 (France Patent No. 2,462,312), a helical compression spring is provided with a recess in the central region which is pivotally mounted on a pivoting head and which receives the helical compression spring in the central region. The formed plate pieces are associated. The articulation axis of the plate piece on the drive head is parallel to the articulation axis of the housing relative to the drive head, which is orthogonal to the axis of the output shaft of the drive mechanism. In a plane containing the axis of the drive shaft and perpendicular to the axis of articulation of the housing relative to the drive head, each trace of the axis of articulation of the housing on the drive head and the axis of the support of the spring on said head is
It is located on the same side of the drive axis as the actual wiper blade. To facilitate the fixing of the wiper element on the drive shaft, the housing is provided with only two mutually parallel wing sections in the area in which the drive head is arranged. A cover is provided to close off the drive head, its attachment to the drive shaft, and associated mechanisms from the outside to prevent an unesthetic impression. Considering the position of the axis of the drive shaft, it was found that there was a problem with the structure of the cover. This disorder is covered by French Patent Application No. 79-19199 dated July 25, 1979.
The problem was solved by the invention described in the specification of French Patent No. 2,462,311. In this patent application, the cover supported by the housing is pivoted about an axis that is susceptible to translational movement parallel to the longitudinal centerline of the housing. Therefore, in this structure, it is necessary to form a sliding groove in each wing portion of the housing for the pivot of the housing. These grooves allow the cover to swing relative to the housing.

Instead of arranging the articulation axis of the housing relative to the head and the support point of the spring on said head on the same side of the axis of the drive shaft as the wiper blade, DE 1217229 discloses that It has been proposed to place the joint axis and support point of the joint on the opposite side to that described above. In this case, when the wiper is supported on the windshield, the axis of the drive shaft is no longer near one end of the housing, but is at right angles to the helical spring near the central area of the housing. Therefore, it is not possible to cut out the web portion of the housing to operate the drive shaft when the wiper is in this position. Therefore, the wiper, when it is in the released position relative to the windshield,
Must be fixed to the drive shaft. The disadvantage here is that it is not easy to adjust the position of the wiper relative to the drive shaft in such a way that the end of the wiper's cleaning path is in the desired position relative to the windshield. With this construction, there is no need to provide a cover over the housing, but the housing must extend longer because it must extend past the drive shaft to the articulation axis of the housing on the head.

The aim of the invention is to eliminate the drawbacks of the two solutions mentioned above. In fact, according to the invention, even if the support point of the compression spring on the drive head and the articulation axis of the housing on the drive head are no longer arranged on the same side of the axis of the drive shaft, the drive head Even if the support point of the upper spring is located on the side of the wiper arm, in this case the pivot axis of the cover does not have to move in translation with respect to the housing, forming a recess in the web part of the housing and causing the housing to The drive shaft can be operated by providing a simple cover that pivots against the drive shaft. The presence of the cover allows the wiper to be mounted on its drive shaft in a position where it is supported on the windshield. This is advantageous with regard to adjusting the position of the wiper's moving end. Furthermore, since the cover does not have to move in translation, excessive rocking relative to the housing is prevented and there is no need to form sliding grooves in each wing portion of the housing.

Therefore, an object of the present invention is to have (a) a head fixed to the output shaft of a drive mechanism, and (b) a connecting means for connecting to a wiper fixture at one end, and a housing attached to the head at the other end. (c) a cylindrical joint provided between the head and the housing along an axis transverse to the axis of the output shaft; In the region perpendicular to a coil spring supported on the head at point R on the one hand and on the housing on the other hand;
a wiper element designed to connect the output shaft of the drive mechanism and the wiper fitting, the wiper element containing the axis of the output shaft of the drive mechanism and perpendicular to the axis of the cylindrical joint of the housing on the head; The point R is located on the same side as the wiper arm with respect to the axis of the output shaft and on the opposite side of the trace of the joint axis of the housing on the head, in the plane It is located in the wiper element.

In a preferred embodiment, the cover is pivotally attached to the housing. Its articulation axis is parallel to the articulation axis of the housing on the drive head. The cover is formed by two parallel wing sections that enclose each wing section of the housing. The wing portions of these covers are connected by a web portion that covers the area of the housing that is perpendicular to the drive head when the cover is lowered. Pivotal attachment of the cover on the housing is effected by two projections projecting from the inner surface of each wing portion of the cover and associated in respective holes in the housing, which act as journal bearings. The two projections of the cover are arranged at right angles in the area where the wing sections of the cover are not connected to each other by a web section.

BRIEF DESCRIPTION OF THE DRAWINGS The following description, given by way of illustrative and non-limiting example only, of the embodiments illustrated in the accompanying drawings, is intended to further clarify the subject matter of the invention.

In this drawing, FIG. 1 is a side view, partially cut away, of a wiper element according to the invention with the movable cover lowered;

2 is a full side view of the wiper element of FIG. 1; FIG.

3 is a side view of the wiper element of FIG. 2 with the cover in a raised position; FIG.

4 is a plan view of the wiper element of FIG. 3; FIG.

As shown, the housing 1 of the wiper element according to the invention comprises two parallel parts connected to each other by a web portion 2c over most of its length.
It is formed from two wing parts 2a and 2b. The housing 1 is articulated or pivoted by an axis 3 to the drive head 4 of the wiper element according to the invention. The drive head 4 is
It is formed of a plate piece 4a provided with a hole 4b into which an output shaft of a drive mechanism (not shown) can be inserted. The output shaft of this drive mechanism has an axis 5. The drive head 4 also has a side piece 4c arranged perpendicularly to the plate part 4a between each wing part 2a, 2b of the housing 1 in the longitudinal center plane of the wiper element according to the invention. The upper part of the side piece 4c forms a rounded projection 4d which rests at point R against the end of a compression spring 6 arranged in the tubular guide 7. L1 indicates the distance between the axes 3 and 5, and L2 indicates the distance between the axis 5 and the point R.

The tubular guide 7 is not cut open in FIG. A tubular guide 7 is supported on the housing 1.
The ends of the tubular guide 7 in the vicinity of the rounded projection 4d are provided with two lateral grooves 8, 8, which act as sliding guides for the rod pieces arranged on each side of the projection 4d.
It is an open end formed with a . A groove is formed in the lower part of the tubular guide 7 so that the side piece 4c can pass therethrough.

In the position shown in FIG. 1, the area of the housing 1 arranged at right angles to the drive head 4 is formed by only two wing parts 2a, 2b.
The web portion 2c is omitted in this part of the housing 1. Figures 1, 2 and 3 show the wiper element of the invention in a position where the wiper blade rests on the windshield to be cleaned. In this position, it is clear that the drive head 4 is free to operate in order to attach it to its drive shaft when the wiper is in the lowered position, since there is no web section 2c at right angles to the drive head 4. In this way, the position of the wiper relative to the windscreen can be easily adjusted at the end of the reciprocating cleaning path. In order to avoid an unesthetic impression due to the absence of a web section 2c at right angles to the drive head 4, a pivot point relative to the housing 1 around two projections 10, 10 forming two pivot pins is provided. A cover 9 that can be used is provided. Each protrusion 10 corresponds to each wing portion 2 of the housing 1.
It is fitted into the holes formed in a and 2b. When the cover 9 is lowered as shown in FIG. 2, the cover 9 can cover the housing area without the web portion 2c. However, when the cover 9 is lifted as shown in FIG. 3, the cover 9 is ready to operate the drive head 4.

Wiper arm 11 connected to housing 1
Considering that the axis 3 is arranged on the side of the axis 5 where the wiper arm 11 is not arranged, when lifting the wiper arm 11 in the downward direction of the arrow to the release position with respect to the windshield, It is clear that there is no risk of it being in a position where it is supported by the vehicle body. Therefore, in this construction, the cover 9 can only pivot relative to the housing 1, and as described in French patent application no.
There is no need to provide a translationally movable cover as in the embodiment described in 19194. The cover 9 is formed by two mutually parallel wing parts 9a, 9b connected to each other by a web part 9c in the area covering the housing area without the web part 2c. On the contrary, the area of the projection 10 and the web part 2 of the housing 1
In the area marked c, the cover 9 is formed by only two wing parts 9a, 9b. The web portion 9c is omitted to allow the cover 9 to pivot freely relative to the housing 1. The cover 9 has an aesthetic function when in the lowered position and a wiper according to the invention when in the raised position.
The element can be fixed to its drive shaft.

It goes without saying that the embodiments described above are not limiting and that various modifications can be made without departing from the scope of the invention.