JPH019721Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rearview mirror device mainly used in motorcycles.

A back mirror device for a motorcycle consists of a housing to which a mirror plate is attached, and a stay for attaching the housing to the handlebar of the vehicle body, and the housing is fastened to the stay.

However, in this rearview mirror device, the housing fastening portion loosens due to vibrations of the vehicle body during driving, causing the housing to rattle or wobble. Therefore, the visibility of the mirror is significantly deteriorated, and this poses a great problem to the running of the vehicle.

FIG. 1 is a longitudinal cross-sectional view of a conventional example of the back mirror device, in which a housing 4 is fastened to a stay 1 using a holding member 10, a pressing member 11, and a fixing nut 2. However, the fixing nut 2 is screwed into the housing 4, so even if the fixing nut 2 loosens and the fixing torque decreases due to travel vibration or wear of the fastening part, it cannot be tightened. It could not be fixed and the problem existed. Incidentally, there is a rearview mirror device having a similar structure and drawbacks as described in Japanese Utility Model Application Publication No. 52-26344.

This idea was created in view of the drawbacks of the conventional example mentioned above.
A fixing nut, an adjusting nut, and a detent nut are screwed onto the stay, the fixing nut is arranged inside the housing, and the adjusting nut and the detent nut are arranged on the outside thereof, and the housing is attached to the fixing nut. and the adjusting nut, the rear mirror device is fastened to the stay, and the adjusting nut is pressed against the fixing nut side by holding the rotation stopper nut. The purpose of this is to facilitate the retightening of the housing and to maintain the rear view mirror in the correct position at all times.

An embodiment of the present invention will be described below based on the drawings.

The stay 1 shown in FIG. 2 is a round rod with a bent upper portion and a threaded portion 5 at the tip. housing 4
is a plate shaped like a plate, with a through hole 6 for inserting the stay 1 in the center, and a mirror plate 7 pasted on the front surface. The locking nut 9 is a cylindrical body having a threaded portion 12 screwed onto the stay 1 and a recessed portion 19 into which the adjusting nut 3 is inserted on the front surface. 10 is a holding member, 11 is a holding member, and through holes 13 and 14 for inserting the stay 1 are formed in the center of both members 10 and 11.
is annular, and the holding member 10 has a concave portion 16 that covers a recessed portion 15 formed at the rear of the housing 4 . Further, 17 is a compression spring, and 18 is a washer.

As shown in FIG. 3, on the threaded part 5 of the stay 1,
The locking nut 9, the adjusting nut 3, the holding member 10, the housing 4, the pressing member 11, the compression spring 17, the washer 18, and the fixing nut 2 are installed in sequence,
A housing 4 is fastened to the stay 1, and the holding member 10, the housing 4, and the holding member 11 are inserted into the stay 1 through their respective through holes 13, 6, and 14, and are disposed on the stay 1. The compression spring 17 and washer 18 are also attached to the holding member 10 and the housing 4.
Similarly to the presser member 11, it is loosely fitted to the stay 1.
The fixing nut 2, the adjusting nut 3, and the locking nut 9 are screwed into the threaded portion 5 of the stay 1. The locking nut 9 loosely fits the adjusting nut 3 in its concave portion 19, contacts the head surface of the adjusting nut 3, and presses the adjusting nut 3 toward the fixing nut 2 side.

In the above configuration, when the fixing nut 2 is tightened, the compression spring 17 is compressed, the holding member 10, the housing 4, and the holding member 11 are pushed toward the adjusting nut 3, and the holding member 10, the housing 4, and the holding member 11 are pushed toward the adjusting nut 3. is squeezed between the fixing nut 2 and the adjusting nut 3. Therefore, the housing 4 is held between the holding member 10 and the pressing member 11, and can be fastened to the stay 1.

Further, in this embodiment, the recess 16 of the holding part 10 hugs the recessed part 15 of the housing 4, which increases the close contact between the housing 4 and the holding part 10, and improves the tightness of the housing 4. In addition, the housing 4 accommodates the presser member 11 and the spring 17 in its recessed portion 15, thereby forming a large space for attaching the mirror plate 7.

After tightening the fixing nut 2 to the required amount and sufficiently tightening the housing 4, attach the mirror plate 7 shown in FIG. 2 to the housing 4 by rotating the packing 8,
To form a certain rearview mirror device for two-wheeled vehicles.
The anti-rotation nut 9 covers the adjustment nut 3, which improves the appearance of the rearview mirror, and
The adjustment nut 3 is pressed against the adjustment nut 3 to prevent it from rotating, and the fixing torque of the housing 4 to the stay 1 is prevented from decreasing due to loosening of the adjustment nut 3.

On the other hand, when the adjustment nut 3 is screwed in, the compression spring 1
7 is further compressed, further tightening the housing 4, and when the adjusting nut 3 is unscrewed,
The compression spring 17 can be expanded to weaken the tightening state of the housing 4, and the degree of tightening of the housing 4 can be easily adjusted.

As explained above, according to the back mirror device of this invention, the housing is fastened to the stay with both the fixing nut and the adjusting nut, and the adjusting nut is regulated by a rotation prevention nut. to ensure that the housing is tightened,
Even if the fixing torque is reduced, the housing can always be held in the correct posture and the original function of the rearview mirror can be maintained for a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing a conventional example, FIG. 2 is a vertical sectional view showing an embodiment of this invention, and FIG. 3 is a diagram of FIG. 2 in a separated state. 1... Stay, 2... Fixing nut, 3... Adjustment nut, 4... Housing, 9... Rotating nut.

Claims (1)

[Scope of utility model registration request] A fixing nut, an adjustment nut, and a detent nut are screwed onto the stay, and the fixing nut is placed inside the housing, and the adjustment nut and detent nut are placed on the outside of the housing. A back mirror device comprising: a fixing nut and an adjusting nut, which are fastened to the stay; and a locking nut, which presses the adjusting nut against the fixing nut.