JPH0513647Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a foldable mirror that is attached to the outer panel of a car door in a horizontal direction and is installed to take a picture of the rear, and when the mirror comes into contact with an obstacle. Alternatively, the mirror can be tilted back and forth in order to reduce the width of the vehicle when parking, etc. In particular, this type of mirror is designed to improve the lubricity of the folding and rotating part of the mirror. be.

BACKGROUND ART Conventionally, in this type of foldable mirror, as shown in FIG. 6, a spring 2 is interposed on a rotating shaft portion 1a of a stand 1 that is erected on a stay (not shown) fixed to the vehicle body. Rotating cylinder part 3a of bracket 3
is rotatably fitted on the outside, a mirror visor (not shown) is fixed to the bracket 3, and when a force is applied in the front and rear direction to the mirror visor, the bracket 3 rotates around the rotating shaft portion 1a. . The lower end rotary seat surface 3b of the bracket rotary cylinder portion 3a is arranged on the lower end seat surface 1b of the rotary shaft portion 1a via a washer 4, and a retractable moderation portion 3c, 1c and 4a are formed. In the rotating sliding portion, a lubricating oil such as grease (Mantemp D) is applied to the rotating seat surface 3b to maintain lubricity. however,
If the number of falls increases or the lubricant is washed away by rain, etc., the lubrication performance will decrease, the coefficient of friction will increase, and the oxide film will peel off due to compression and tension.
Eventually, the lubricating oil film broke, exposing the base surface, and compressive plastic deformation and heat accelerated adhesive wear, resulting in problems such as an increase in tipping force and abnormal wear on the rotating seat surface. .

Purpose of the invention This invention aims to solve the above-mentioned conventional problems, and aims to improve the lubricity of the foldable rotating part of the foldable mirror and prevent the occurrence of abnormal friction.

Structure and operation of the invention This invention was made to achieve the above-mentioned object, and is attached by fitting the rotary cylinder part of the bracket rotatably onto the rotary shaft part of the stand fixed to the outer panel of the automobile. A foldable mirror having a structure in which a mirror visor for storing and holding the mirror in a tiltable manner is fixed to the bracket, and the mirror visor is folded back and forth or backwards by rotating the bracket around the rotation shaft, A seat surface protruding outward is provided at the lower end of the rotating shaft of the stand, and on the upper surface of the seat surface, upwardly protruding convex portions having a chevron-shaped cross section are provided at predetermined intervals in the circumferential direction. On the other hand, a rotary seat surface opposite to the seat surface is formed at the lower end of the rotary cylinder portion of the bracket to protrude outward, and the rotary seat surface has a cross-sectional valley facing the moderation convex portion. Moderation recesses recessed upward in the shape of a shape are provided in the radial direction at predetermined intervals in the circumferential direction, and the rotating seat surface of the bracket is placed on the upper surface of the seat surface of the stand via a washer, and the stand side is placed on the washer. A moderating convex portion of the same shape that fits with the moderating convex portion of the bracket is provided, and the rotating seat surface of the bracket is configured to slide along the upper surface of the washer, and the rotating seat surface of the bracket is Oil reservoir recesses are provided downward between the adjacent moderation recesses, and these oil reservoir recesses are filled with lubricating oil, and the oil is constantly supplied to the rotating seat surface and filled into the recesses. To provide a foldable mirror which is characterized by being difficult to wash away and thus maintaining proper lubrication performance.

Embodiments Hereinafter, this invention will be explained in detail with reference to embodiments shown in the drawings.

In the figure, 10 is a stand that is fixed to the outer panel of the vehicle body (door outer panel) via a stay (not shown), 11 is a bracket that is fitted onto the rotating shaft portion 10a of the stand 10 and is rotatably attached, and 12 is a bracket that is rotatably attached. Bracket 1
This is a visor fixed to the visor support frame 11a of No. 1.

As shown in the figure, the stand 10 has a substantially cylindrical rotating shaft portion 10a with a large diameter lower portion, a spring storage portion 10b, and a seat surface 10c protruding outward at its lower end. The seating surface 10c is provided with moderation convex portions 10d that project upward in the radial direction and have a chevron-shaped cross section as shown in FIG. 2 at predetermined intervals in the circumferential direction. There is.
A pipe 13 is fitted into the rotating shaft portion 10a, and a spring 14 is inserted between the lower end outwardly bent portion 13a of the pipe 13 and the upper end wall of the spring storage portion 10b.
It is reduced in size.

The bracket 11 is formed with a rotating cylindrical portion 11b having a shape that fits over the rotating shaft portion 10a, and
A rotary seat surface 11c, which faces the seat surface 10c, is formed at the lower end of the rotary cylinder portion 11b to protrude outward. The above-mentioned moderating convex portion 10 is provided on the rotating seat surface 11c.
Moderation recess 11d having a valley-shaped cross section facing d
As shown in FIG. 4, they are recessed in the radial direction at predetermined intervals in the circumferential direction. The rotating cylinder portion 11b
A visor support frame 11a is integrally connected to the frame 11a, and a visor mounting hole 11f is provided in the frame 11a.

The bracket 11 has a rotary tube portion 11b rotatably fitted onto the rotary shaft portion 11a of the stand, and a lower rotary seat surface 11c thereof is disposed via a washer 15 on the seat surface 10c of the stand. The washer 15 also has a moderating convex portion 1 having a chevron-shaped cross section and projecting upward, which fits into the moderating convex portion 10d of the stand.
5a, and a washer 15 is mounted on the seat surface 10c so as not to rotate. Therefore, bracket 11
When the washer 15 rotates, the rotating seat surface 11c slides along the upper surface of the washer 15. The rotating seat surface 11c of the bracket has an adjacent moderation recess 1.
Recesses 11e for oil sump are formed downward between 1d and 1d.
The recessed portion 11e is filled with a lubricant. The oil reservoir recess 11e has a shape that is deep enough to hold lubricant. The upper part of the rotary cylinder part 11b is made to protrude from the rotary shaft part 10a, and the pipe 13 is made to protrude from the upper end of the rotary cylinder part 11b, and the ring 17 attached near the upper end of the pipe 13 is attached to the upper end of the rotary cylinder part 11b. By making the pipe 13 contact with the spring 14 and urging it downward, the rotary cylinder part 11
b is urged downward, and the rotating seat surface 11c is pressed against the washer 1.
5 and is constantly pressed against the seat surface 10c of the stand 10.

Visor support frame 11a of bracket 11
A visor 12 is fixed with screws (not shown) or the like, and a mirror 20 is housed and held within the visor 12 via conventionally known means so as to be tiltable in vertical and horizontal directions.

In the mirror having the above configuration, the visor 1
When the visor 12 hits an obstacle or the visor 12 is pushed forward or backward to reduce the vehicle width,
The bracket 11 rotates together with the visor 12 around the stand rotating shaft 10a, and its rotating seat surface 11c rotates while sliding along the upper surface of the washer 15. In this rotating part, an oil sump recess 11e is provided in the bracket rotating seat surface 11c, and the recess 11e is filled with a lubricant, so that when the washer 15 rotates, the moderation projection 15a of the washer 15 moves into the oil sump recess 11e. It plays the role of spreading the lubricating oil onto the sliding surface, and the rotating seat surface 11c is constantly supplied with the lubricating oil, so that proper lubrication performance can be maintained.
In addition, since the recess 11e is filled with lubricating oil, the lubricating oil is not easily washed away even when water is splashed on the bracket 11 during car washing, and the lubricating performance can be maintained.

The oil sump recess of the above invention (diameter 1.2 to 1.8 mm)
The force that holds the bracket in the set position when it is filled with lubricating oil and when no grease is applied to the rotating seat surface of the conventional bracket.
In other words, we conducted a comparative experiment on the force required to knock down the visor (folding force). In the experiment, the bracket was rotated 180 degrees each time.

The results are shown in Figure 7. When conventional grease is not applied, as shown by the solid line in the figure, the holding force to hold the bracket at the set position is large due to the lack of grease at the beginning. In other words, a large amount of force is required to knock down the visor (folding force), and this folding force increases rapidly to nearly +30%. However, since there is no grease, the rotating seat surface rapidly wears out, and the force for holding the bracket in a predetermined position rapidly decreases due to the wear of the rotating seat surface. In other words, as shown in the figure, the folding force decreases to nearly -30% at the 200th rotation, and the force to hold the bracket in the set position decreases, so to speak.
I was in a shaky state.

On the other hand, in the case where there is an oil pool in the embodiment of the present invention shown by the two-dot chain line in the figure, the force required to fold down the visor with the lubricant is smaller than the initial one.
In addition, the presence of the lubricant prevents the wear of the rotating seat surface from progressing, so the force that holds the bracket in the set position does not decrease like in the conventional case, and even after 1500 repeated rotations, it does not rotate 180 degrees. It was possible, and its collapsing power remained unchanged.

In this way, the embodiment of the present invention does not require a greater force than originally required to fold down the visor, and moreover, it is possible to maintain a substantially constant force for holding the bracket in the set position.

Effects As is clear from the above explanation, according to the foldable mirror of this invention, by providing an oil reservoir in the foldable rotating part (rotating seat surface of the bracket),
Since lubricating oil is constantly supplied to the rotating parts and is difficult to leak out, appropriate lubrication performance can be maintained. In addition, it is easy to manufacture the recess for oil sump, and it can be provided with almost no change in cost.
It has great practical value.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the foldable mirror according to this invention, Fig. 2 is a front view of the bracket, Fig. 3 is a sectional view of Fig. 2, and Fig. 4 is a cross-sectional view of the bracket. A bottom view, FIG. 5 is a partially enlarged sectional view of FIG. 4, FIG. 6 is a sectional view of the conventional example, and FIG. 7 is a diagram showing the results of an experiment comparing the lubrication performance of the present invention and the conventional example. be. 10...stand, 10a...rotating shaft section, 10
c...Seat surface, 11...Bracket, 11b...Rotating tube portion, 11c...Rotating seat surface, 11e...Recessed portion for oil reservoir, 12...Visor, 13...Pipe, 1
4... Spring, 15... Watshiya.

Claims (1)

[Claims for Utility Model Registration] A bracket 11 is rotatably attached to a rotating shaft portion 10a of a stand 10 fixed to the outer panel of an automobile.
The mirror visor 12 for storing and holding the mirror in a freely tiltable manner is fixed to the bracket 11 by fitting the rotary tube part 11b of the stand 10 on the outside, and the bracket 11 rotates around the rotary shaft part 10a of the stand 10, so that the mirror can be opened. In a folding mirror having a structure in which the visor 12 rotates forward or backward, a seat surface 10c protruding outward is provided at the lower end of the rotating shaft portion 10a of the stand 10, and the seat surface 10c
Moderation convex portions 10d having a chevron-shaped cross section and protruding upward in the circumferential direction are provided on the upper surface at predetermined intervals in the circumferential direction.
A rotary seat surface 11c, which faces the seat surface 10c, is formed to protrude outward at the lower end of the rotary seat surface 1.
1c is provided with moderation concave portions 11d which are recessed upward in a trough-like cross-section, facing the moderation convex portion 10d, in the radial direction at predetermined intervals in the circumferential direction, and the rotating seat surface 11c of the bracket 11 is provided with a washer 15. The washer 15 is provided with a moderation convex portion 15a of the same shape that fits with the moderation convex portion 10d on the stand side, and the bracket 11 is placed on the upper surface of the seat surface 10c of the stand. is 1
5, and the rotary seat surface 11c of the bracket 11 is provided with oil reservoir recesses 11e downwardly recessed between the adjacent moderation recesses 11d. A folding mirror characterized by having a structure in which a lubricating oil agent is filled in a recessed portion 11e.