JPS5839945Y2 - Impact force absorption mechanism in door mirrors - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automobile door mirror, and in particular, when a force exceeding a certain level is applied to the mirror body, the mirror body rotates to absorb and alleviate the impact force applied thereto.

A rearview mirror attached to a car is used to check the rear view when driving the car and ensure driving safety. Because of this, there is a high risk of accidents resulting in collisions or contact with other objects or people while driving.

Therefore, when a force above a certain level is applied to the mirror body due to a collision, etc., the rearview mirror absorbs and alleviates the impact force, reducing damage to objects and people that collide with it, and at the same time protects the rearview mirror itself. Measures are being taken to do so.

For example, in a fender mirror, a stay is formed at the base so that it can be bent freely, and when an external force of a certain level or more is applied to the mirror body, the stay is tilted to alleviate the impact force.

However, in the case of door mirrors, the mirror body is formed to be biased to one side with respect to the stay, and when it collides with an object, a force that tries to rotate the mirror body around the stay is applied. Therefore, it was extremely difficult to construct a mechanism that could smoothly absorb this force, and there was no suitable mechanism.

The present invention improves the above-mentioned door mirror by rotatably connecting the stay and base, crimping them together using a coil spring, and interposing steel balls on the crimping surface to resist external forces. It keeps the force constant and has good operational durability and stability.

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

In the figure, numeral 1 is a mirror body, and 2 is a stay.

A reflecting mirror 3 is attached to the front surface of the mirror body 1, and the stay 2 is attached to one side of the mirror body as shown in the figure.

This stay 2 may be formed integrally with the mirror body 1, or it may be formed separately and fixed to the mirror body 1 using bolts or the like without any problem. Of course.

A bottomed cylindrical depression 5 is cut into the lower surface of the stay 2 to rotatably fit a base 4, which will be described later, and a connecting rod is provided in the center of the depression to connect the stay and the base. 6
is installed protrudingly.

On the other hand, a lidded connecting protrusion 7 is provided on the upper surface of the base 4 so as to fit into the above-mentioned case 5.

At the center of the lid surface of the connecting protrusion 7 is the connecting rod 6.
A through hole 8 is drilled to penetrate the steel ball 9, and several, for example, three retainers 10 are cut around the upper surface of the hole to hold the steel ball 9. 5 ceiling surface 5'
Also, a retentivity 11 corresponding to the above-mentioned retentivity 10 is removed.

The shapes of the retainers 10 and 11 are not particularly limited, but it is sufficient if they are approximately spherical and have a size sufficient to retain the steel ball 9, but one may have a deeper shape. (
It is desirable to form the steel ball so that at least half of the steel balls are embedded therein.

By the way, if the door mirror is a remote-controlled rearview mirror, the base 4 and connecting rod 6 should be formed hollow as shown in the figure and connected to the inside of the mirror podium so that the operating wire or electrical cord can pass through them. shall do so.

To connect the stay 2 and the base 4, a connecting protrusion 7 is provided in the recess 5.
At the same time, a steel ball 9 is inserted for retention, a washer 12 is attached to the lower end of the connecting rod 6, and a coil spring 13 is compressed between the washer and the ceiling surface of the connecting projection 7.

Then, the force of the coil spring 13 trying to expand acts on the washer 12, so it is pushed downward by this force, and the force is transmitted to the stay via the connecting rod 6, causing the bottom surface of the recess 5 of the stay to is brought into pressure contact with the lid surface of the connecting projection 7.

This pressing force acts on the steel ball 9, thereby inhibiting the rotation of the mirror body 10.

In the above, a nut or the like is usually used to attach the washer 12 to the connecting rod, but as shown in the figure, a claw 14 is formed in the center of the washer, and a groove 15 is formed in the lower part of the connecting rod 6. If the pawl 14 is cut into the groove 15 when the washer 12 is fitted into the connecting rod 6, the assembly process will be considerably simplified.

As detailed above, the present invention forms the stay of the fender mirror so that it can rotate relative to the base, so that when an impact force is applied to the mirror body, the mirror body rotates around the base. In particular, since the stay and base are fitted together and a steel ball is interposed between the contact surfaces of the two, it is difficult to set the strength of the impact force on the mirror pod to activate it. This is done reliably, with few manufacturing errors, and its strength is less likely to change due to repeated operations.

That is, as shown in FIG. 4, when an impact force is applied to the mirror body and a force a that rotates the stay 2 is applied, that force acts on the contact point between the retainer 11 and the steel ball 9, and Then, the stay rides on the steel ball 9.

Of course, in this case, the minimum force required for the stay 2, in other words, the retainer 11 to ride on the steel ball 9, is determined by the pressing force by the spring 13 and the surface angle at the contact point of the steel ball with respect to the rotating direction a of the stay 2. It is.

If the retainer 11 is formed into a conical shape as shown in the figure, the angle will be approximately constant regardless of the variation in the depth of the recess. You can gain power.

In addition, in the drawing, the retaining recess 11 shows an example in which the retaining recess 10 is formed shallower than the retaining recess 10. However, it is also possible to form the retaining recess 10 shallower than the retaining recess 10. In this case, the upper surface of the base 4 is a steel ball. It got to 9.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing one embodiment of the present invention;
The figure is an exploded front view of the same as above, and Figure 3 is a perspective view showing the washer.
FIG. 4 is a longitudinal sectional view showing the operating state of the main parts. 1...mirror pode, 2...stay,
3...Reflector, 4...Base, 5...
... hollow, 6 ... connection rod, 7 ... connection projection, 8 ... through hole, 9 ... steel ball,
10... Retention, 11... Retention, 1
2...Washer, 13...Spring, 14...Claw, 15...Groove.

Claims (1)

[Scope of utility model registration request] A depression is cut on the lower surface of the stay, a connecting rod is protruded from the center thereof, and several retainers 11 are formed on the ceiling surface of the depression,
On the other hand, a connecting protrusion is provided on the upper surface of the base to fit into the recess, and the connecting rod is passed through the protrusion, and the upper surface of the protrusion corresponds to the retainer 11. In the door mirror, the retainer 10 is cut out, a steel ball is interposed between both retaining recesses, and a coil spring is compressed between the ceiling surface of the protrusion and the lower part of the connecting rod. Shock-absorbing horizontal grooves.