JPS6328687Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shock-absorbing door mirror.

Since door mirrors for automobiles are installed so as to protrude from the sides of the vehicle body, there is a possibility that they may collide with external obstacles. In the event of a collision, shock-absorbing door mirrors are used to reduce damage to the other object and to prevent damage to the door mirror itself.

FIG. 1 is a plan view showing an example of a buffer type door mirror. 1 is a mirror base fixed to a car body 2; 2 is a mirror housing supporting a mirror 4; A hinge member 5 is interposed between the mirror base 1 and the mirror housing 3, and the mirror housing 3 is urged toward the mirror base 1 by a tension spring 6. In this figure, the direction of travel of the vehicle is downward. The front end of the hinge member 5 is hinged to the mirror housing 3 via a hinge pin 7 and a bracket 8, and the rear end of the hinge member 5 is hinged to a hinge pin 9 and a bracket 10.
It is hinged to the mirror base 1 via.

When an external force acts on the mirror housing 3 of the shock-absorbing door mirror configured as described above as shown by arrow A, the mirror housing 3 moves around the hinge pin 9 along with the hinge member 5 as shown in FIG.
Rotate and tilt in direction A′. Since this tilting is performed against the biasing force of the tension spring 6 while being extended, the impact caused by the external force in the direction of arrow A is alleviated.

Further, when receiving an external force as indicated by arrow B, the mirror housing 3 tilts around the hinge pin 7 in the direction of arrow B', as shown in FIG. 3, to alleviate the impact.

As described above, the shock-absorbing door mirror configured as shown in FIG. The normal posture is maintained as shown in this figure by the urging force of .

However, when the car is moving, the mirror housing 3 is subjected to vibrations and inertial forces as well as wind pressure in the direction of arrow A, which causes the contact surface of the mirror housing 3 to tend to float relative to the mirror base 1, creating a technical problem in that it is prone to causing so-called chatter vibrations.

If the mounting load of the tension spring 6 is increased and the biasing force of the mirror housing is strengthened, chatter vibration will be less likely to occur, but if the mounting load of the tension spring 6 is increased, each component that makes up this buffer type door mirror will be damaged. Since the device must be constructed to be durable, the entire device becomes large and heavy, resulting in problems such as increased manufacturing costs.

FIG. 4 shows an exploded perspective view of the buffer type door mirror. FIG. 5 is a perspective view of the mirror housing 3 tilted forward, and corresponds to FIG. 3 described above. FIG. 6 is a perspective view of the device tilted backward and corresponds to FIG. 2.

As shown in FIGS. 2 and 6, when the mirror housing 3 is tilted backward as indicated by an arrow A', the hinge member 5 rotates about the hinge pin 9 and moves away from the mirror base 1. As shown in FIG.

The chattering vibration explained earlier is caused by the second
As shown in FIG. 6, the mirror housing 3 is not in a state where it has largely rotated in the direction of arrow A', but when it is about to rotate in the direction of arrow A' from its normal position, the hinge member 5 comes into contact with the mirror base 1. This is a case where it seems to be floating off the surface.

The present invention was created in view of the above circumstances, and the purpose is to provide a buffer type door mirror that has a simple and inexpensive configuration and is free from the risk of causing chatter vibration, without increasing the size and weight of the entire device. do.

The inventor of the present invention focused on the fact that the occurrence of chatter vibration is caused by the hinge member 5 tending to float from the contact surface of the mirror base 1, as described above, and decided to assist the biasing force of the tension spring 6. It is possible to prevent chatter vibration by applying an elastic force to cause the hinge member 5 to come into contact with the mirror base 1, and the above elastic force is applied when the hinge member 5 comes into contact with the mirror base 1. The present invention was developed by taking advantage of the fact that it is sufficient to provide only in the state.

Based on the above-mentioned principle, in order to prevent chatter vibration of the mirror housing with a simple structure, the present invention provides a rod-shaped spring near the abutment part between the mirror base and the hinge member, and this rod-shaped spring is bent. Attach this to the mirror base as you wish,
On the other hand, the hinge member is characterized in that a protrusion is formed on the hinge member so that it can be engaged with and disengaged from the rod-shaped spring.

Next, an embodiment of the present invention will be described with reference to FIGS. 7 to 9. This embodiment is an improvement by applying the present invention to the conventional shock-absorbing door mirror shown in FIGS. 4 to 6. FIG. 7 is a diagram corresponding to FIG. The figure corresponds to FIG. 6 in a conventional device. Mirror base 1, mirror housing 3, tension spring 6, hinge pin 7, bracket 8, and hinge pin 9, which have the same drawing reference numbers as in FIGS. 5 and 6, are the same components as in the conventional device, respectively. . Also, the hinge member 5' and the bracket 10', which are shown with the same reference numerals as in FIGS. 5 and 6 but with a dash, are improvements over the components of the conventional device.

In this embodiment, a piano wire 21 is used as a spring member and is attached to a bracket 10' fixed to the mirror base 1. FIG. 9 shows an exploded perspective view of the vicinity of the mounting section.

In this embodiment, an annular portion 21a is formed at one end of the piano wire 21, and a rivet 22 is used to secure the bracket 1.
Caulk at 0'. 10a is a rivet hole drilled in the bracket 10'.

The other end 21b of the piano wire 21 has a rim portion 10 formed by folding up the edge of the bracket 10'.
It is inserted through the hole 10c drilled in b. In this embodiment, as described above, the piano wire 21, which is a rod-shaped spring member, is placed in the bracket 1 in a bendable state.
It is attached to the mirror base 1 via 0'.

As shown in FIG. 7, a protrusion 5a is formed on the hinge member 5' so that it engages with the rod-shaped spring 21 described above when the hinge member 5' is rotated and brought into contact with the mirror base 1. . In the state shown in FIG. 7, the protrusion 5a engages with the rod-shaped spring 21 and prevents the hinge member 5' from rotating in the direction away from the mirror base 1. However, when a strong force is applied, the rod spring 21 is engaged with the protrusion 5a. The shaped spring 21 is bent and the above engagement is released. Also, when pressed with a strong force, they engage as shown in the figure.

In the state shown in FIG. 8, the rod-shaped spring 21 and the protrusion 5a are disengaged, and the mirror housing 3
It does not exert a restraining force on the rotation of.

In this embodiment, as described above, the hinge member 5' is
A protrusion 5a that can be engaged with and detached from the rod-like spring 21 is formed.

Since this embodiment is constructed as described above, when the mirror housing 3 is in the normal posture, the hinge member 5' is brought into contact with the mirror base 1 by the biasing force of the tension spring 6, and is further shaped like a rod. The posture is maintained by the engagement between the spring 21 and the protrusion 5a. Therefore, there is no risk of chatter vibration occurring during running.

When the mirror housing 3 collides with an external object and tilts backward, the engagement force between the rod-shaped spring 21 and the protrusion 5a acts as resistance to the tilting operation of the mirror housing 3. However, there is no risk of hindering the tilting operation of the mirror housing 3 or impairing the buffering function for the following reasons.

For easy understanding by comparing FIGS. 1 and 2, the mirror housing 3 is shown in its normal position (first
When the tension spring 6 is in the tilted position (Fig. 2), the tension spring 6 has standard mounting dimensions and mounting load, but in the tilted position (Fig. 2), the tension spring 6 is stretched and the tension increases.

As is clear from the above-mentioned structural function, the restraining force due to the engagement between the rod-shaped spring 21 and the protrusion 5a is
The biasing force of the tension spring 6 acts only in a normal posture in which it is in a reduced state, and when the mirror housing 3 starts to tilt, the restraining force due to the above-mentioned engagement disappears. Therefore, there is no possibility that the restraining force generated by the configuration of the present invention will adversely affect the buffering function.

Moreover, if the spring is formed into a rod shape as in this embodiment, the structure is simple, and the constituent members are small, lightweight, and inexpensive. When implementing the present invention, the method of attaching the rod-shaped spring can be arbitrarily selected. As is clear from the above-mentioned principle of operation, the rod-shaped spring in the present invention must be mounted so that it can be bent by being pushed by the protrusion, and no matter how it is mounted so that it can be bent, it will not work as described above. Similar effects and effects can be obtained. In this embodiment, the rod-shaped spring is supported in a double-sided manner, but it may be supported in a cantilevered manner. Further, it is possible to attach the rod-shaped spring member by slightly deforming it.

As detailed above, by applying the present invention, it is possible to construct a shock-absorbing door mirror without increasing the size and weight of the entire device, with a simple and inexpensive structure, and without the risk of causing chatter vibrations. .

[Brief explanation of the drawing]

Figures 1 to 6 show an example of a conventional shock-absorbing door mirror, with Figure 1 being a horizontal sectional view in the normal position, Figure 2 being a horizontal sectional view in the rear tilted position, and Figure 3 being the forward tilted position. Horizontal cross section at,
FIG. 4 is an exploded perspective view, FIG. 5 is a perspective view in a forward tilted position, and FIG. 6 is a perspective view in a backward tilted position. 7 to 9 show one embodiment of the shock-absorbing door mirror of the present invention, FIG. 7 is a perspective view in a forward tilted position, FIG. 8 is a perspective view in a rearward tilted position, and FIG. 9 is a rod-shaped spring. FIG. 3 is an exploded perspective view showing the attached state. DESCRIPTION OF SYMBOLS 1... Mirror base, 3... Mirror housing, 5, 5'... Hinge member, 5a... Protrusion, 6
...Tension spring, 7,9...Hinge pin, 8,10,10'...Bracket, 21...
Rod-shaped spring member made of piano wire, 21
a... Same annular part, 21b... Same end part, 22...
Rivets.

Claims (1)

[Scope of utility model registration request] The mirror housing is brought into contact with a mirror base fixed to the automobile body via a hinge member, and a tension spring is interposed and engaged between the mirror housing and the mirror base, so that the mirror In a buffer type door mirror in which the housing is biased in the direction of pressing the mirror base, a rod-shaped spring is provided near the abutting part between the mirror base and the hinge member, and the rod-shaped spring is set in a state where it can be bent. A buffer-type door mirror, which is attached to a mirror base and has a protrusion formed on the hinge member that can be engaged with and detached from the rod-shaped spring.