JPH0242531Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a wiper device.

In a conventional wiper device, as shown in FIG. 1A, a wiper motor 2 is installed between an inner panel 1 and an outer panel 4 of the vehicle body.
was fastened to the inner panel 1 via a bracket 3 with screws, and a pivot portion 5 protruding from the outer panel 4 was fixed to the outer panel 4 as shown in FIG. In Figure 1 B, 9
is the shaft to which the wiper arm 13 is attached,
It is supported by a sleeve 8. This sleeve 8
The nut 11 is passed through a hole drilled in the outer panel 4 and screwed into the threaded part 10 of the sleeve 8, and the rubbers 6, 6 and washers 7, 7 provided on both sides of the outer panel 4 are tightened. and is supported by the outer panel 4. A cap 12 is fitted onto the shaft 9 to prevent water from entering through the portion of the shaft 9 that protrudes from the sleeve 8.

However, this structure had a large number of parts and required a lot of man-hours during installation. Furthermore, the wiper motor 2 is fixed to the inner panel 1 via the bracket 3, and its pivot portion 5 is also supported and fixed to the outer panel 2, so the wiper motor 2 is fixed to the inner panel 1 via the bracket 3. Although it is necessary to secure the dimensions between the bracket 3 and the pivot part 5 and fix it, it is difficult due to the dimensional tolerance of each part and assembly error, and sometimes there is a problem that the outer panel 4 is deformed by tightening the pivot part 5. Ta.

As a solution to this problem,
As shown in Japanese Patent No. 55124, a structure has been proposed in which the sleeve and shaft can be assembled to the glass with a certain degree of freedom. but,
This product measures waterproofing by having a sealing member fixed to the car body slide against the rotating shaft.
If the shaft and the hole in the seal member that the shaft passes through are assembled with misalignment, the hole in the seal member that makes sliding contact with the shaft will be deformed, creating a gap between the shaft and the shaft, which may cause water to enter from the sliding contact area. There is.

The present invention was made in order to solve the above-mentioned problems, and a wiper motor is installed between an inner panel and an outer panel, the wiper motor is fixed to the inner panel, and the wiper motor is fixed to the sleeve integrally attached to the wiper motor. In an apparatus in which a supported shaft passes through a cap made of an elastic material attached to a hole in the outer panel, and a wiper arm is attached to the tip of the shaft, the wiper arm has a recess formed on the lower surface of the attachment hole to the shaft. The cap is formed with a plurality of annular protrusions on the inner periphery of the hole, and a skirt part that spreads like a skirt is formed on the upper end, and the outer periphery of the shaft contacts the protrusions and the recess of the wiper arm. The skirt portion of the cap enters into the cap, and the upper surface of the recess is in contact with the skirt portion, which is intended to reduce the number of parts, improve assembly workability, and further improve waterproofness.

Hereinafter, embodiments of the present invention will be described based on the drawings. In FIG. 2A, 1 is an inner panel at the rear of the automobile body, 4 is an outer panel, and 13 is a rear windshield glass. 2 is a wiper motor installed between the inner panel 1 and the outer panel 4, and is connected to the inner panel 1 via the bracket 3.
The support is fixed. Reference numeral 5 designates a pivot portion 5, on which a shaft 9 is supported by a sleeve 8 that is integrally assembled to the wiper motor. This pivot portion 5 passes through a hole drilled in the outer panel 4 and protrudes to the outside, and the wiper arm 1 is attached to the tip of the shaft 9.
5 is fixed. A cap 14 made of an elastic material (for example, rubber) is attached to the hole in the outer panel 4, and covers the hole in the outer panel 4 while inserting the shaft 9 therethrough. To explain the installation order of this wiper device, first, the cap 14 is attached to the outer panel 4.
, then wiper motor 2 on inner panel 1.
Insert it in the direction of the arrow from the opening. At this time, the shaft 9 passes through the hole 16 of the cap 14 and projects to the outside. In this state, the bracket 3 attached to the wiper motor 2 is tightened and fixed to the inner panel 4. Finally, the wiper arm 15 is fixed to the tip of the shaft 9 with a nut to complete the assembly.

In this manner, the wiper motor 1 is fixed to the inner bracket, and the shaft 9 only passes through the cap 14, and there is no problem that the outer panel is deformed during assembly, unlike the conventional device shown in FIG. In addition, unlike the conventional method, the pivot portion is not fixed to the outer panel with screws, the number of parts is small, and assembly is easy.

Next, the structure near the pivot portion 5 will be explained based on FIG. The wiper arm 15 has a recess 19 formed on the lower surface thereof where it is attached to the shaft 9. A cap 14 that covers the hole in the outer panel 4 is attached to the outer panel 4, and has a plurality of annular protrusions 17 formed on its inner periphery, and a skirt portion 18 that expands into a skirt shape at its tip. . The projection 17 is in elastic contact with the outer periphery of the shaft 8 passing through the hole in the outer panel 4, and the skirt portion 18 is pressed against the upper surface 20 of the recess 19 of the wiper arm 15. Therefore, in addition to preventing water from entering the recess 19 of the wiper arm 15, the elastic contact between the skirt portion 18 and the upper surface 20 of the recess 19 prevents misalignment of the shaft 8 and the hole in the outer panel 4. Even if it is raised, water will be prevented from entering the hole 16. Further, even if a small amount of water intrudes from this part, the plurality of annular protrusions 17 are in contact with the shaft 9, and water will be completely prevented from entering the space between the outer panel 4 and the inner panel 1 and the inside of the sleeve 8. That will happen.

FIG. 3 shows a case where the shaft 9 is assembled to the outer panel 4 in a non-perpendicular state, where A is a conventional example and B is an example of the present invention.

As described above, according to the present invention, since the wiper motor simply passes through the cap attached to the inner panel, the number of parts is reduced, ease of assembly is improved, and the conventional problem of deformation of the outer panel is avoided. Furthermore, the cap has a plurality of annular protrusions formed on its inner periphery, and a skirt portion is formed at the tip thereof, each of which is in elastic contact with the upper surface of the concave portion of the shaft or wiper arm. This has the effect of improving waterproofness.

[Brief explanation of the drawing]

FIGS. 1A and 1B are a structural diagram and an enlarged sectional view of a pivot portion of a conventional wiper device. FIGS. 2A and 2B are a structural diagram and an enlarged sectional view of the pivot portion of the wiper device according to the present invention. Figure 3 A and B are
FIG. 3 is a structural diagram showing another conventional example and an embodiment of the present invention. 1: Inner panel, 2: Wiper motor, 3: Bracket, 4: Outer panel, 5: Pivot part,
8: Sleeve, 9: Shaft, 14: Cap,
15: wiper arm, 6: hole, 17: protrusion, 1
8: Skirt portion, 19: Recessed portion, 20: Top surface.

Claims (1)

[Scope of utility model registration request] A wiper motor is installed between an inner panel and an outer panel, the wiper motor is fixed to the inner panel, and a shaft supported by a sleeve integrally attached to the wiper motor is connected to an elastic member attached to a hole in the outer panel. In a device in which a wiper arm is attached to the tip of the shaft, the wiper arm has a recess formed on the lower surface of the shaft, and the cap has a plurality of annular protrusions on the inner periphery of the hole. A skirt portion is formed at the upper end and expands into a skirt shape, and the outer periphery of the shaft contacts the protrusion, and the skirt portion of the cap enters into the recess of the wiper arm, so that the upper surface of the recess and the skirt portion are in contact with each other. A wiper device characterized by: being in contact with each other.