JPH0134906Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention relates to wipers used in vehicles, etc.
Especially regarding that wiper arm.

(Prior art) A wiper arm connects an arm head that is connected to a wiper motor and rotates, and a wiper blade that comes into contact with the glass surface to be wiped.The wiper arm is connected to the arm head by a hinge pin and moves close to and away from the glass surface. The retainer includes a retainer that is swingable in a direction, and a spring that acts between the arm head and the retainer to apply a spring force to the retainer in a direction toward the glass surface under normal conditions.
For maintenance of the wiper blade, manual wiping of the glass surface, etc., it is required to be able to hold the wiper arm in a position separated from the glass surface, and for this purpose it is necessary to move the wiper arm in a direction away from the glass surface by a certain angle. Generally, when the spring is pressed, the spring acts in the opposite direction, resulting in a so-called lockback condition.

9 and 10 show an example of a conventional wiper arm, 1 being an arm head, 2 a retainer, 3 a hinge pin, 4 a spring, 5 a pin connecting the spring and the arm head, and 6 an arm piece. The spring 4 is curved downward at a position close to the support pin 3 to form a protrusion 4C, and when the spring 4 is in the lockback state, the hinge pin 3 and the spring 4
This is done so that there is no interference between the two.

(Problem to be solved by the invention) The spring 4 shown in Figures 9 and 10 is
Since the protrusion 4C is provided on the wiper arm, the height of the wiper arm is high, which poses a problem in that it obstructs the driver's view.

(Means for Solving the Problems) According to the present invention, a strut is hingedly supported at one end via a pin and supported movably in the longitudinal direction via a support pin that engages the other end in a long recess. a member is disposed between the arm head and the retainer;
A wiper arm is provided having a spring disposed between the strut member and the retainer to provide the spring force.

In a preferred embodiment, the end of the strut member on the arm head side is supported by a pin, and a long hole extending in the longitudinal direction of the strut member is provided as the long recess at the other end, and a support pin provided on the retainer extends through the long hole. penetrate.

(Function) It becomes possible to arrange the strut member and the spring within the internal space of the retainer, and the desired lockback state can be obtained without the need to provide a downward protrusion, thereby reducing the height of the wiper arm. I can do it.

(Embodiment) Fig. 1 is an exploded view of the main parts of an embodiment of the present invention, Fig. 2 is a side view, and Fig. 3 is a bottom view. In the figure,
The arm head 11 has a narrow end portion 11a, and a pin 16 for hinge-supporting the strut member 15 is provided at this position. A hinge pin 13 that hinges the arm head 11 and the retainer 12 is located below and outward from the pin 16 (see FIG. 1A). In the illustrated embodiment, the retainer 1
2 has a substantially rectangular cross section with an open bottom, and the strut member 15 has a substantially rectangular cross section with an open top and is located inside the retainer 12, with a spring 14 disposed between them. . Strut member 15
Although the end portion 15a that engages with the pin 16 is bifurcated, it may have a hole through which the pin 16 is inserted. Elongated holes 17, 17 are provided at the other end 15b of the strut member 16, and a support pin 18 attached to the retainer 12 extends through the elongated holes. The elongated holes 17, 17 provided in the end portion 15b of the strut member 15 may be grooves with one or both ends open. The support pin 18 is parallel to the pin 16 and the hinge pin 13. An arm piece 19 is fixed to the tip of the retainer 12. One end 14a of the spring 14 engages with a mounting piece 20 fixed to the inner surface of the retainer 12, and the other end 14b engages with a mounting piece 20 fixed to the strut member 15. Spring 14 is shown as a tension spring, and when strut member 15 is positioned to the right of line XX in FIG. 1A, its spring force will cause retainer 12 to move clockwise in FIG. When the retainer 12 is located to the left of the line XX, the retainer 12 is urged in the opposite direction. Note that within the strut member 15, a compressive force acts between the attachment piece 21 and the end portion 15a.

4 to 8 show modified examples, in which 11 is an arm head, 13 is a hinge pin, and 25
is a strut member, 26 is a pin that connects the strut member and the arm head, 24 is a connecting portion to which the outer end of the spring is connected, 27 is a long hole (long recess), and 28 is constructed as two pieces. Rivets or bolts connecting the strut members to each other are shown, respectively. Note that in FIGS. 5 and 8, the elongated hole 27 is shown as a groove with one end open.

(Effects of the invention) According to the invention, since there is no protrusion projecting from the lower surface of the retainer, the height of the wiper arm can be made small, and there is no risk of interference between the hinge pin and the spring when the wiper arm is in the lockback state. In the embodiments shown in FIGS. 1 to 3, the strut members are shaped to cover the lower surface of the retainer, so that the appearance can be improved.

[Brief explanation of the drawing]

FIG. 1 is an enlarged perspective view showing the main parts of an embodiment of the present invention, FIG. 1A is a partial side view showing the relative positions of some parts in a normal state and a lockback state, and FIG. FIG. 3 is a side view, FIG. 3 is a bottom view, FIGS. 4 to 8 are partial perspective views showing modified examples, and FIG.
The figure is a side view showing a conventional technique, and FIG. 10 is a bottom view of FIG. 9. 1, 11: Arm head, 2, 12: Retainer, 3, 13: Hinge pin, 4, 14: Spring, 5, 16, 26: Pin, 4C: Projection, 1
5, 25: Strut member, 15a, 25a: End portion, 17, 27: Long recess (long hole), 18: Support pin.

Claims (1)

[Claims for Utility Model Registration] (1) A retainer that is connected to a rotatable arm head via a hinge pin and swings in a direction toward and away from the glass surface, and a retainer that acts between the arm head and the retainer and The wiper arm includes a spring that applies a spring force to the retainer in the direction of locking back the spring force in the direction close to the glass surface, and a spring force in the direction of moving away from the glass surface. A wiper arm comprising: a strut member supported movably in the longitudinal direction via matching support pins; provided between an arm head and a retainer; and the spring disposed between the strut member and the retainer. (2) A support in which the end of the strut member on the arm head side is supported by a pin provided on the arm head, and the other end of the strut member is engaged with a long recess provided in the strut member and fixed to the retainer. A wiper arm according to claim 1, which is supported by a pin.