JPS647900B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) This invention relates to a stay support portion of a door mirror.

(Prior art) As shown in Fig. 1, the door mirror A protrudes to the side so that it does not disturb passersby when the vehicle is parked, and is placed at the dotted line position when parking the vehicle. Rotate and set. Therefore, the stay b of the door mirror A frequently rotates with respect to the stay base attached to the door. This type of door mirror A has a structure as shown in FIG. That is, there is a through hole 2 in the center of the top 1.
A cylindrical recess 5 provided on the stay b supporting the door mirror part a is fitted onto the outside of the stay base c which has a cylindrical part 4 with an annular end plate 3 having an annular end plate 3. A cylindrical shaft 7 having a male thread cut on the outer periphery is screwed and fixed through the bottom 6 of 5, and the cylindrical shaft 7 is inserted into the cylindrical part 4 through the through hole 2, and is inserted into the concave part. Between the bottom 6 of the cylindrical shaft 7 and the end plate portion 3, balls d are interposed at three equally spaced locations, and between the flange portion 8 provided at the lower end of the cylindrical shaft 7 and the inside of the cylindrical portion 4. A coil spring 9 is stretched on the stay b.
is rotatably coupled to the stay base c. Note that 10 in FIG. 2 indicates the outer panel of the door on the driver's seat side.

(Problem to be Solved by the Invention) Therefore, when the stay B is rotated on the stay base C while holding the door mirror portion A, the material of both the stay B and the stay base C is normally made of aluminum or zinc die-cast alloy. Since the ball d interposed between the two is a hard steel ball, the part where the ball d rolls is damaged as shown in Figure 3, and the door mirror part a is not properly supported. On the other hand, this type of door mirror A prevents vibrations from the vehicle body from being transmitted to the door mirror part a while driving, causing small vibrations that make it difficult to see the mirror.
A gap m is provided between the inner circumferential wall 5' of the cylindrical concave part 5 and the outer circumferential wall 4' of the cylindrical part 4 to reduce the portion where vibrations are directly transmitted from the stay base c to the stay b, The elasticity of the coil spring 9 is designed to absorb vibrations as much as possible, but the door mirror A has a relatively large door mirror portion a, and the wind pressure hitting the back of the door mirror portion a is also relatively large, so vibrations can be absorbed as much as possible. There were drawbacks such as the background being difficult to see. An object of the present invention is to provide a stay support part for a door mirror that can eliminate the above-mentioned drawbacks.

[Structure of the Invention] (Means for Solving Problems) The stay support portion of the door mirror of the present invention includes a hard metal annular plate 12 on the upper surface of a light metal stay base c fixed to the outer panel 10 of the door. The stay b of the door mirror A is urged such that the bottom 6 of the stay b of the door mirror A is rotatable and constantly in contact with the hard metal annular plate 12, and between the bottom 6 and the annular plate 12, a steel Balls d are interposed at equal pitches p, and the balls d are particularly immersed deep into the bottom 6 by more than the radius r of the balls d, and the annular plate 12 is provided with ball fitting holes 15 at equal pitches to the balls d. It has been established.

(Function) In this invention, when the door mirror A is held and rotated as shown in FIG.
Since the ball d is deeply immersed in the ball d, it is lifted up from the ball fitting hole 15 of the hard metal annular plate 12 against the biasing elasticity, the stay b rotates, and the ball d is moved by one pitch p. When rotated, since each ball d has an equal bit p, it fits into the next ball fitting hole 15 of the hard metal annular plate 12 and is secured in the rotation position.
It doesn't move at all. Note that even if the ball d does not rotate by one pitch p, it is stopped at the retracted rotation position due to the elasticity of the biasing force, and the door mirror A can be finely adjusted.

(Example) Based on FIGS. 4 and 5, the case where the present invention is applied to the stay support part of a door mirror will be described. A cylindrical part having an annular end plate part 3 having a through hole 2 in the center on the top part 1. On the stay base c having 4,
The cylindrical recess 5 provided in the stay b of the door mirror A is fitted, and the cylindrical shaft 7, which is fixed by passing through the bottom 6 of the recess 5, is inserted into the cylindrical portion 4 through the through hole 2.
A coil spring 9 is inserted between the flange portion 8 provided at the lower end of the cylindrical shaft 7 and the inside of the cylindrical portion 4, so that the stay b can be freely rotated relative to the stay base c. In the door mirror A connected to
On the upper surface of the end plate portion 11, a tongue piece 12' is further fixed to a hard metal annular plate 12 whose surface is plated with stainless steel or hard chrome plating, and a tongue piece 12' is fixed to the bottom of the recessed hole portion 5. 6 and the annular plate 12, about three steel balls d are interposed at equal pitches, and the balls d
In particular, the radius r of the ball d is located at the bottom 6 of the concave portion 5.
The annular plate 12 has a ball fitting hole 1 at the same pitch as the ball d.
5. Note that a mirror remote control wire group 18 is passed through the inside of the cylindrical shaft 7.

[Effects of the Invention] In this invention, the hard metal annular plate 12 that comes into contact with the ball d is made of stainless steel or steel with hard chrome plating on the surface, so it is much harder than soft materials such as aluminum or zinc. Therefore, even if the stay b is rotated frequently, the annular plate 12 will not be damaged.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of how to handle the door mirror, Fig. 2 is a longitudinal cross-sectional view of the stay support part of a conventional door mirror, Fig. 3 is an explanatory diagram of the drawbacks of the stay support part of a conventional door mirror, and Fig. 4 5 is a vertical cross-sectional view of a main part of an embodiment of a stay support portion of a door mirror according to the present invention, and FIG. 5 is an enlarged vertical cross-sectional view of a holding structure for a ball d. 1 is a top part, 2 is a through hole, 3 is an end plate part, 4 is a cylindrical part, 5 is a cylindrical recessed part, 6 is a bottom, 7 is a cylindrical shaft, 9 is a coil spring, 11 is an end plate part, 12 15 is a hard metal annular plate, 15 is a ball fitting hole, a is a door mirror portion, b is a stay, and A is a door mirror.

Claims (1)

[Claims] 1. A hard metal annular plate 12 is fixed to the upper surface of a light metal stay base c fixed to the outer panel 10 of the door, and the bottom 6 of the stay b of the door mirror A is rotatable with respect to the hard metal annular plate 12. between the bottom 6 and the annular plate 12,
Steel balls d are interposed at equal pitches p, and the balls d are particularly immersed deep into the bottom 6 by more than the radius r of the balls d, and the balls d are fitted into the annular plate 12 at equal pitches. A stay support part for a door mirror, characterized in that a hole 15 is provided.