JP2001080469A - Wiper structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a damage and a deformation of a member caused by an erroneous operation at the time of attachment/detachment of a blade member and an arm member. SOLUTION: In a wiper structure, a pivot shaft 12 and a bearing recessed portion 15 provided on an arm member 8 and a blade member pivotally attached to a tip end thereof respectively are attachably/detachably mounted at a predetermined relative angle different from that in the using state. The arm member and the blade member are formed such that they are engageable in a predetermined direction, i.e., a direction approximately perpendicular to a longitudinal direction of the blade member and a pivot shaft and a bearing recessed portion can be attached/detached by relatively sliding the arm member and the blade member in a direction different from the engagement direction, i.e., a direction approximately along the longitudinal direction of the blade member. Thereby, since an attachment and a detachment are carried out by a recognizable and stepwise operation such as an engagement and a slide, an erroneous operation can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper structure in which a pivot is held in a bearing recess in order to detachably pivotally connect an arm member and a blade member, and more particularly, to a wiper structure in which the pivot and the bearing recess are different from a use state. And a wiper structure that can be disengaged at a relative angle of.

[0002]

2. Description of the Related Art In a wiper device for wiping a windshield surface of an automobile, a wiper blade is swingably connected to a wiper arm for supporting the curved windshield surface so as to follow the curved windshield surface. . The connecting portion between the wiper blade and the wiper arm has a structure that is detachable so that the wiper blade can be easily replaced due to deterioration of the blade rubber.

The main part of this type of wiper device is generally formed of a metal material. However, since a high strength is not required for a rear windshield having a low wind pressure, it is possible to use a synthetic resin. In this case, in order to detachably pivot the wiper arm and the wiper blade,
If the pivot is held in a bearing recess provided with an opening into which the pivot can be fitted, the cost can be reduced by reducing the number of parts by integral molding.

In such a connection structure, it is necessary to form the opening of the bearing recess so as to be narrow to prevent the pivot from coming off. However, the peripheral portion of the bearing recess is elastically deformed to allow the passage of the pivot during detachment. In such a configuration, the holding force on the pivot is reduced to obtain the required elasticity, and a disadvantage arises in that it is not possible to employ a hard and scratch-resistant synthetic resin material.

On the other hand, for example, Japanese Utility Model Publication No. 63-466
As disclosed in Japanese Unexamined Patent Publication No. 1-2005, if the pivot is formed to have a flat cross-sectional shape so that it can be detached only when the pivot and the bearing recess have a specific relative angle, the bearing recess is bent. Insertion and removal can be performed without any inconvenience, and the above-described inconvenience can be avoided. Although the above-mentioned publication relates to a connection structure between a primary lever and a yoke lever which constitute a blade, a similar structure can be applied to a connection between an arm and a primary lever.

[0006]

In such a wiper structure, it is possible to prevent the pivot and the bearing recess from being disengaged at an angle different from the relative angle in the use state, thereby avoiding the detachment during use. it can. However, if the angle at which the pivot and the bearing recess can be engaged and disengaged is not clearly known, if the forcible insertion and removal is performed at the wrong angle, the bearing recess will deform beyond the elastic limit, resulting in breakage or permanent deformation. This will cause rattling.

[0007] The present invention has been devised to solve such problems of the prior art, and its main objects are as follows.
It is an object of the present invention to provide a wiper structure configured to prevent breakage and deformation of a member due to an erroneous operation when a blade member and an arm member are attached and detached.

[0008]

In order to achieve the above object, according to the present invention, a pivot 12 provided on one of the arm member 8 and the blade member 6 pivotally attached to the tip of the arm member 8 is provided on the other side. In the wiper structure in which the provided bearing recess 15 can be disengaged at a relative angle different from the use state,
The arm member and the blade member are formed so as to be fittable in a predetermined direction, and are relatively slid in a direction different from the fitting direction so that the pivot and the bearing recess can be disengaged.

[0009] According to this, since the attachment and detachment can be performed in an easy-to-understand stepwise operation by fitting and sliding, erroneous operation can be avoided. The fitting of the arm member and the blade member positions the open portion of the bearing recess and the pivot at an angular position suitable for engagement, and the sliding of the arm member and the blade causes the bearing recess and the pivot to move in an appropriate direction. If it is set to be disengaged at, it is possible to avoid forcible pushing and pulling at the wrong angle.

[0010] In particular, the blade member can be fitted to the connecting portion at the tip end of the arm member in a direction substantially perpendicular to the longitudinal direction, and slides in a direction substantially along the longitudinal direction of the blade member to form the pivot shaft and the bearing recess. Is preferably disengageable. According to this, since the fitting direction and the sliding direction are greatly different, the attaching / detaching operation can be more easily understood and the erroneous operation can be prevented. In this case, if the arm member and the blade member can be fitted in a posture in which their longitudinal directions are substantially orthogonal to each other, the blade member and the arm member are used in such a state that the blade member and the arm member generally follow each other. Since the blade member is tilted by approximately 90 °, the relative angle between the pivot and the bearing recess greatly changes from an angle at which the blade member can be engaged and disengaged, so that the detachment in the use state can be reliably avoided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a wiper device to which the present invention is applied. The wiper device includes a wiper blade 3 having a blade rubber 2 for wiping a windshield glass surface 1, and a wiper arm 4 for swingably holding the wiper blade 3 so that the blade rubber 2 follows the curved glass surface 1. And

The blade rubber 2 is held by a primary lever (blade member) 6 via a yoke lever 5,
A connecting portion 7 at the tip of the wiper arm 4 is connected to a longitudinally intermediate portion of the primary lever 6. The wiper arm 4 includes an arm body (arm member) 8 and an arm head 10 connected to a pivot 9. The arm body 8 is pivotally supported by the arm head 10, and the wiper blade 3 is locked away from the glass surface 1. The arm main body 8 can be tilted to the back state, and the wiper blade 3 can be replaced in this locked back state as described later in detail.

As shown in FIG. 2, a fitting hole 11 for receiving the connecting portion 7 of the arm body 8 is formed at a longitudinally intermediate portion of the primary lever 6 of the wiper blade 3.
In this fitting hole 11, a pivot 12 for swingably connecting the primary lever 6 to the arm body 8 is provided.
It is provided in a manner of being bridged between the opposing side walls 13. The pivot 12 has a substantially D-shape in which a part of a circular section is cut out.
It has a U-shaped cross section and is obtained by integrally molding the primary lever 6 with a synthetic resin material.

The connecting portion 7 of the arm body 8 has a U-shaped cross section, and a pair of side walls is provided with a bearing recess 15 for holding the pivot 12. This bearing recess 15
The arm 8 is opened in a direction substantially perpendicular to the longitudinal direction of the arm body 8, more specifically, in a direction inclined slightly toward the distal end from a direction perpendicular to the longitudinal direction. Slits 16 are formed on both sides of the bearing recess 15.
Due to the elastic deformation of the portion between the bearing recess 15 and the bearing recess 15, the bearing recess 15 can be slightly expanded and contracted, whereby the pivot 12 can rotate relatively smoothly without rattling. The bearing recess 15 and the slit 16 are obtained by integrally molding the arm body 8 with a synthetic resin material. The distal end portion of the connecting portion 7 is formed in a tapered shape so that the fitting into the fitting hole 11 is smoothly performed.

The bottom 15c of the bearing recess 15 is
Are formed in an arc-shaped cross section in order to smoothly perform the relative rotation of. And a pair of open edge parts 15a and 15b
The width of the opening between the two is made smaller than the diameter of the pivot 12. As shown in FIG. 3, the width c of the open portion
Is substantially the same as the minor axis of the pivot 12, that is, the maximum width d in the direction orthogonal to the cutout surface 12a, and the pivot 12 can pass only at a predetermined relative angle.

The width a of the connecting portion 7 on the tip side from the bearing recess 15 is equal to the pivot 12 and the fitting hole 1 opposed thereto.
1 is substantially the same as the distance b from the inner surface 11a, and the back surface 17 of the connecting portion 7 slides along the inner surface 11a while the open side of the bearing recess 15 in the connecting portion 7 is regulated by the pivot 12. The connecting portion 7 is fitted into the fitting hole 11. Here, the inner surface 11a of the fitting hole 11 is
FIG. 3 shows a state in which the primary lever 6 (wiper blade 3) and the arm main body 8 are arranged so that their longitudinal directions are orthogonal to each other.
As shown by an arrow A therein, the arm can be fitted in a direction substantially orthogonal to the longitudinal direction of the primary lever 6 (wiper blade 3), that is, in a substantially longitudinal direction of the arm body 8.

One of the bearing recesses 15 (the base end side)
The open edge 15a of the other (opening end) 15b
It is formed in a slightly projecting manner. Therefore, when the connecting portion 7 is inserted into the fitting hole 11, the pivot 1 is attached to one open edge 15a of the connecting portion 7 as shown in FIG.
2 is caught, the fitting into the opening is regulated, and the opening of the bearing recess 15 and the pivot 12 are substantially aligned.

When the primary lever 6 (wiper blade 3) is turned from the substantially aligned state as shown by arrow B,
The pivot 12 is guided by the taper of the open edge portion 15a, and the back surface of the connecting portion 7 tilts while being restricted by the opening edge portion of the inner surface 11a of the fitting hole 11, as shown by an imaginary line in FIG. , The pivot 12 is displaced toward the entrance side of the bearing recess 15, and the relative angle is such that the pivot 12 can pass through the opening of the bearing recess 15.

Next, as shown by an arrow C, a direction substantially perpendicular to the fitting direction,
When the (wiper blade 3) is slid in the longitudinal direction, the pivot 12 is received in the bottom 15c of the bearing recess 15 as shown in FIG. By applying a longitudinal force to the primary lever 6 (wiper blade 3) from the substantially aligned state shown in FIG. 4, the state naturally transitions to the engaged state shown in FIG. 5 through the state shown by imaginary lines in FIG. It is possible to do.

When the primary lever 6 (wiper blade 3) is turned from the engaged state shown in FIG. 5 as shown by the arrow D, the primary lever 6 (the wiper blade 3) is tilted about the pivot 12 as shown in FIG.
The use state in which the primary lever 6 (wiper blade 3) substantially follows the arm main body 8 can be achieved. In this use state, the pivot 12 and the bearing recess 15 have a relative angle that cannot be separated. The load F acting on the primary lever 6 as a reaction force when the arm main body 8 presses the wiper blade 3 against the glass surface by the spring urging force acts in a direction to cause the pivot 12 to bite into the bearing recess 15. It is securely held in the bearing recess 15.

As described above, the wiper blade 3 can be attached to the arm main body 8, and the wiper blade 3 can be removed from the arm main body 8 in the reverse procedure.

In this embodiment, the pivot is provided in the fitting hole on the wiper blade side and the bearing recess is formed on the wiper arm side. Conversely, the bearing recess is provided in the fitting hole on the wiper blade side. And a configuration in which a pivot is provided on the wiper arm side is also possible. For example, in FIG. 7, bearing recesses 23 are provided on the inner surfaces of a pair of side walls of the fitting hole 22 of the primary lever 21 facing each other, and the pivot 26 projects on the outer surfaces of a pair of opposite side walls of the connecting portion 25 of the arm body 24. Has been established.

In this case, the fitting and sliding operation can be made substantially the same as in the above-described embodiment by opening the bearing recess 23 in a direction substantially along the longitudinal direction of the primary lever 21. Also, one open edge of the bearing recess 23 is projected from the other, so that the bearing recess 23 and the fitting hole 2
2 by appropriately setting the interval with the inner surface 22a.
When the connecting portion 25 is fitted into the fitting hole 22, the opening of the bearing recess 23 and the pivot 26 can be positioned at a position where they are aligned at an appropriate relative angle.

[0025]

As described above, according to the present invention, the blade member and the arm member are attached and detached by easy step-by-step operation by fitting and sliding, and furthermore, it is possible to avoid forcible pushing / pulling at an incorrect angle. Therefore, a great effect can be obtained in preventing damage and deformation of the member by avoiding erroneous operation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state where a wiper device to which a wiper structure according to the present invention is applied is mounted on a vehicle body.

FIG. 2 is an exploded perspective view showing a main part of the wiper device shown in FIG. 1;

FIG. 3 is an essential part cross-sectional view showing a state of attachment of a wiper blade to a wiper arm.

FIG. 4 is a cross-sectional view of a main part showing how the wiper blade is attached to the wiper arm.

FIG. 5 is a cross-sectional view of a main part showing how the wiper blade is attached to the wiper arm.

FIG. 6 is a cross-sectional view of a main part showing how the wiper blade is attached to the wiper arm.

FIG. 7 is a sectional view of a main part showing another embodiment of the wiper structure according to the present invention.

[Explanation of symbols]

 Reference Signs List 3 wiper blade 4 wiper arm 6 primary lever (blade member) 8 arm body (arm member) 11 fitting hole 12 pivot 15 bearing recess

Claims (2)

[Claims] 1. A wiper structure in which a pivot provided on one of an arm member and a blade member pivotally attached to the tip of the arm and a bearing recess provided on the other can be disengaged at a relative angle different from a use state. The arm member and the blade member are formed so as to be fitted in a predetermined direction, and the pivot and the bearing recess can be disengaged by relatively sliding in a direction different from the fitting direction. A wiper structure characterized by: 2. The pivot shaft according to claim 1, wherein said blade member is fitted to a connecting portion at a tip end of said arm member in a direction substantially orthogonal to a longitudinal direction of said arm member, and slides in a direction substantially along the longitudinal direction of said blade member. The wiper structure according to claim 1, wherein the wiper and the bearing recess are detachable.