JPH0217939Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a shock absorbing mechanism for a door mirror for an automobile, and in particular to a shock absorbing mechanism that is improved so that the tilted posture of the door mirror housing can be easily maintained during the shock absorbing operation. be.

[Background of the idea]

Since door mirrors for automobiles are mounted so as to protrude from the side of the vehicle body, there is a chance of collision with an obstacle while driving. For this reason, shock-absorbing door mirrors are used to cushion and absorb the impact in the event of a collision.

FIG. 1 is a horizontal sectional view schematically depicting an example of a shock-absorbing door mirror, and the upper side of the figure corresponds to the front of the automobile.

A mirror base 2 is fixed to a vehicle body 1. 3 is
This is a mirror housing that supports a mirror 4. A hinge member 5 is provided between the mirror base 2 and the mirror housing 3.

One end of the hinge member 5 is pivotally attached to the mirror base 2 by a rear shaft 7, and is supported so as to be rotatable rearward (counterclockwise) from the illustrated state.

The mirror housing 3 is pivotally attached to the other end of the hinge member 5 by a front shaft 6, and is supported so as to be able to rotate forward (clockwise) from the illustrated state.

A tension spring 8 is interposed between the mirror base 2 and the mirror housing 3, and its tension pushes the mirror housing 3 toward the mirror base 2, so that it can function as a door mirror as shown in the figure. (hereinafter referred to as normal posture)
are kept.

When the shock-absorbing door mirror configured as described above receives an external force from the front as shown by arrow A, the hinge member 5 rotates rearward as shown in FIG. 2, and the mirror housing 3 tilts rearward at the same time. Also,
When an external force is applied from behind as indicated by arrow B, the mirror housing 3 tilts forward as shown in FIG.
The above-mentioned forward and backward tilting operations are both performed while resisting the biasing force of the tension spring 8, so that the impact of the external force is absorbed by the tension spring 8 and alleviated.

By the way, since the door mirrors protrude to the sides of the vehicle body, there is also the problem that, for example, in the case of shipping, it is uneconomical because the distance between the cars lined up in the hold must be widened. In such a case, it is economical to maintain the mirror housing 3 in a rearwardly tilted position as shown in FIG. 2, since the distance between the vehicles can be reduced.

As mentioned above, by providing a means for holding the mirror housing 3 in a rearward tilted position, it is possible for a car equipped with this side mirror to pass through a place where there is a narrow distance from an obstacle, such as when parking in a garage. When doing so, it is convenient to be able to tilt the mirror housing so that it does not get in the way.

However, since the tension spring 8 described above performs a buffering function, the mounting load is quite strong (e.g.
30 kg), so in order to maintain the tilted posture as shown in Fig. 2, for example, the imaginary line 9
It must be supported with a sturdy holding jig as shown. As mentioned above, it is very troublesome for the driver to prepare a special holding jig and to attach and detach it every time the vehicle is put into the garage.

[Purpose of invention]

This idea was created in view of the above circumstances.
The objective is to provide a door mirror for an automobile whose mirror housing can be easily held in a tilted position or restored to its normal position.

[Summary of the idea]

In order to achieve the above object, the door mirror of the present invention has a hook member interposed between the mirror base and the tension spring that automatically engages and disengages as the mirror housing rotates. That is, a hook member having a hook portion that engages with and disengages from the engagement member fixed to the mirror base and a guide groove hole is configured, and this hook member is rotatably attached to the mirror housing. one end of the tension spring is slidably engaged with the guide groove via a sliding guide means, and the other end of the tension spring is engaged with the roller housing, and the hook The guide slot provided in the member is configured as follows.

When the hinge member and the mirror housing pivoted thereon are in the normal posture and the hook member is engaged with the engaging member fixed to the mirror base, the line of action of the tension of the tension spring is Assuming a line perpendicular to , the guide groove is inclined with respect to this imaginary vertical line. The direction of this inclination is made to coincide with the direction in which the mirror housing rotates rearward together with the hinge member.

In the above state, the front end of the guide groove provided in the hook member is located forward of the pivot point of the hook member, and the rear end of the guide groove is located rearward of the pivot point of the hook member. The length of this guide groove hole is set so that it is located at .

[Example of idea]

FIG. 4 is a horizontal sectional view schematically depicting one embodiment of the shock absorbing mechanism of the present invention in order to explain its configuration and operating principle, and the portions drawn by solid lines and broken lines are in the normal posture. It represents.

The mirror base 2 is used while being fixed to the vehicle body 1. The hinge member 5
One end is pivotally attached to a rear shaft 7 so as to be rotatable rearward.

A mirror housing 3 is pivotally attached to the other end of the hinge member 5 by a front shaft 6 so as to be rotatable forward.

A hook member 10 having a hook portion 10a and a guide groove hole 10b is rotatably attached to the mirror housing 3 via a shaft 11.

On the other hand, the hook portion 10 is attached to the mirror base 2.
An engagement hook 12, which is an engagement member that engages and disengages, is fixed to a, and when the hook member 10 rotates counterclockwise about a shaft 11, the engagement hook 1
2 and disengages when rotated clockwise.

Although FIG. 4 is schematically drawn, when implementing the present invention, the hook member 10 and the mirror base 2
The engaging means for engaging with the hook member 10 may be two hooks as in this example, or may be a combination of a hook and a pin.In short, the engaging member that engages and disengages from the hook member as the hook member 10 rotates is a mirror. It is sufficient if it is fixed to the housing.

The tension spring 8 is engaged with the above-mentioned hook member 10 via a sliding guide means as described below. A guide groove 10b is provided in the hook member 10, a roller 13 is loosely fitted into the guide groove 10b, and one end of the tension spring 8 is engaged with the roller 13. FIG. 5 is an extracted perspective view of the vicinity of the sliding guide means, and FIG. 6 is an exploded perspective view of the constituent parts shown in FIG. 5.

A roller 13 is loosely fitted into the guide groove hole 10b, rotatably supported by a roller shaft 14, and engaged with the tension spring 8 via a pair of connecting plates 15.

In the present invention, the sliding guide means is a general term for means that function mechanically equivalent to the sliding guide means, and uses a configuration including rolling members as shown in FIGS. 5 and 6. You can also do that.

When the mirror housing 3 is in its normal position as shown in FIG. 4, the tension spring 8 applies tension in the direction of arrow F to the roller 13 as shown by the solid line. Assuming a line H perpendicular to the line of action of the biasing force indicated by the arrow F above, the guide groove hole 10b is provided at a slight angle with respect to this line H.

The direction in which the guide groove hole 10b is inclined with respect to the above-mentioned imaginary vertical line H is made to coincide with the rotation direction when the mirror housing 3 rotates backward (in this example, the counterclockwise direction).

When the roller 13 is pulled in the direction of arrow F by the tension spring 8 in the normal posture shown in FIG.
It rolls forward along the vehicle body (upward in the figure) and engages with the front end of the guide groove hole 10b. The reason why the roller 13 rolls forward in this way is through the guide groove hole 10b.
This is because it is inclined in the counterclockwise direction (backward rotation direction of the hinge member 5) with respect to the imaginary vertical line H.

In this state (normal posture), the front end of the guide groove hole 10b is set forward of the shaft 11 so that the line of action of the tension arrow F of the tension spring 8 passes in front of the shaft 11 (above the figure). I'll keep it. As a result, the hook member 10 receives a counterclockwise rotating force around the shaft 11 due to the tension of the tension spring 8, and the hook portion 10a engages with the engaging hook 12. Therefore, tension spring 8
roller 13, guide groove hole 10b, hook member 1
0. It is engaged with the mirror base 2 via the engagement hook 12, and the mirror housing 3 is pressed toward the mirror base 2 to maintain a normal posture.

A roller 13 provided at one end of the tension spring 8 is engaged with the guide groove hole 10b, and the other end of the tension spring 8 is engaged with the mirror housing 3. Therefore, when the mirror housing is rotated, the other end of the tension spring 8 rotates together with the mirror housing 3, and the line of action of the tension of the tension spring 8 changes.

When a force is applied to the mirror housing 3 to tilt it backwards as shown by arrow D, the tension spring 8 also rotates to the position of the imaginary line 8', and the direction of the tension moves toward the rear (as shown by arrow F'). (downward in the figure). The direction of the tension changes and the guide groove hole 10
When the direction is perpendicular to b, and further beyond that state, the roller 13 is caused to roll at the rear end (lower end in the figure) of the guide groove hole 10b, as indicated by the imaginary line 13', and this rolling causes Accompanied by tension spring 8
The point of application of tension moves. The position of the rear end of the guide groove hole 10b is set to the rear of the shaft 11 so that the line of action of the tension arrow F' of the tension spring 8' in this state passes behind the shaft 11 (lower part in the figure). I'll keep it.

When the line of action of the tension arrow F' passes behind the shaft 11, the hook member 10 is rotated clockwise about the shaft 11, and the hook portion 10a is disengaged from the engagement hook 12.

Due to the detachment of the hook portion 10a, the tension spring 8' is disengaged from the mirror base 2, and the mirror housing 3 is moved from the hinge member 5.
It is simply rotatably supported by the rear shaft 7 via the rear shaft 7, and its rotational posture can be maintained with a small amount of force.

FIG. 7 shows a horizontal cross-sectional view of one embodiment of a door mirror to which the above-mentioned basic structure is applied, and 10 is a hook member explained with reference to FIG. 4 (schematic diagram), and 10a
10b is a guide slot, 11 is a pivot shaft of the hook member, and 13 is a roller. 16
An engagement pin is an engagement member that engages with the hook member, and is fixed to the mirror base 2 by a bracket 17.

When the mirror housing 3 of the embodiment shown in FIG. 7 is tilted backward (downward in the figure) by applying force, the hook member 10
The hook portion 10a is disengaged from the engagement pin 16, and the mirror housing 3 becomes free to rotate. This state is shown in FIG.

In this way, when the tension of the tension spring 8 is separated from the mirror base 2, the mirror housing 3 is no longer subject to the rotational force of the tension spring 8, so that the mirror housing 3 can be held in the tilted position with a light force. can. Further, even if the tension spring 8 is kept in this state for a long period of time, there is no risk of it becoming sagging since it is not forcibly stretched. For the same reason, the excessive force of the tension spring 8 is not applied to the mirror housing 3, so there is no risk of cracking or deforming the mirror housing.

Mirror housing 3 tilted as shown in Figure 8
In order to restore the mirror housing 3 to its normal posture (FIG. 7), it is sufficient to raise and rotate the mirror housing 3 in the direction of the normal posture. With this rotation, the hook member 10 moves in the direction indicated by the arrow R shown in FIG. 8 about the rear shaft 7.
The edge 10 facing the hook portion 10a revolves as shown in FIG.
c comes into contact with the engagement pin 16 and is forcibly rotated in the hook engagement direction (counterclockwise direction), engages with the engagement pin 16, and restores the normal posture shown in FIG.

As described above, in the door mirror of this embodiment, when the mirror housing 3 is tilted rearward (in the direction of arrow D in FIG. 4), the hook member 10 is rotated in the disengagement direction (clockwise in the figure). , the tension of the tension spring 8 is released from the mirror base 2. Next, the effect when the mirror housing 3 is tilted forward (in the opposite direction of arrow D in FIG. 4) will be described.

In FIG. 4, when a force is applied to the mirror housing 3 to tilt it forward (towards the top of the figure), the tension spring 8 rotates clockwise in the figure and reaches the 8'' position. The tension of the tension spring is biased toward the front of the vehicle body (upward in the figure) as indicated by arrow F'', and its line of action passes behind the shaft 11, causing the hook member 10 to rotate clockwise. By clockwise rotation of the hook member 10, the hook portion 10a is released from engagement with the mirror base 2, and the connection between the tension spring 8 and the mirror base 2 is released. FIG. 9 is a horizontal cross-sectional view of the mirror housing 3 in a state where it is tilted forward and the rotation biasing force of the tension spring 8 is released.

[Effect of idea]

As detailed above, according to the buffer mechanism of the present invention, when force is applied to the mirror housing to tilt it backward or forward, the tension of the tension spring acting on the mirror housing is automatically released. , the mirror housing can be easily held in a tilted position, and furthermore, the mirror housing in a tilted position can be easily restored to its normal position.

[Brief explanation of the drawing]

Figures 1 to 3 are horizontal sectional views schematically depicting conventional automobile door mirrors. Figure 1 shows the normal posture, Figure 2 shows the rear tilted state, and Figure 3 shows the forward tilted state. are shown respectively. FIG. 4 is a horizontal sectional view schematically depicting an embodiment of a door mirror equipped with a shock absorbing mechanism according to the present invention. FIG. 5 is an exploded perspective view showing the assembled state of the hook member and its related parts in the above embodiment, and FIG. 6 is an exploded perspective view. 7 to 9 show one embodiment of the shock absorbing mechanism for a door mirror according to the present invention, in which FIG. 7 is a horizontal sectional view in a normal posture, FIG. 8 is a horizontal sectional view in a rearward tilted state, and FIG. FIG. 3 is a horizontal cross-sectional view in a forward tilted state. DESCRIPTION OF SYMBOLS 1... Vehicle body, 2... Mirror base, 3... Mirror housing, 4... Mirror, 5... Hinge member, 6... Front shaft, 7... Rear shaft, 8... Tension spring, 10... ...Hook member, 10a...
...Hook part, 10b...Guide groove hole, 11...Shaft,
12...Engagement hook, 13...Roller, 14...
Roller shaft, 15... Connection plate, 16... Engagement pin, 17... Bracket.

Claims (1)

[Claims for Utility Model Registration] One end of the hinge member 5 is pivotally attached to the mirror base 2 fixed to the vehicle body by a rear shaft 7 so as to be able to rotate rearward from the normal position, and the hinge member 5 A shock absorber in which a mirror housing 3 is pivotally attached to the other end of the member so as to be able to rotate forward from a normal position, and a tension spring 8 is interposed between the mirror base 2 and the mirror housing 3. In the automobile door mirror of the type, a hook member 10 having a guide groove hole 10b is interposed between the mirror base 2 and the tension spring 8, and one end of the tension spring 8 is connected to the guide groove. The hook member 10 is slidably engaged with the slot 10b via a sliding guide means, and the other end of the tension spring is engaged with the mirror housing 3.
An engaging member 12 is fixed to the mirror base 2, and is rotatably attached to the mirror base 2 by a shaft 11, and engages and disengages from the hook member as the hook member rotates. A door mirror shock absorbing mechanism characterized in that the shape and dimensions of the guide groove hole 10b of the hook member 10 are configured as follows. a When the hook member 10 is engaged with the engagement member 12 and the mirror housing 3 and hinge member 5 are in the normal posture, the guide groove hole 10b of the hook member is perpendicular to the line of action of the tension spring 8. The hinge member 5 is inclined in the same direction as the direction in which the hinge member 5 rotates rearward with respect to the imaginary line H. b In the above state, the front end of the guide slot 10b provided in the hook member 10 is located forward of the shaft 11 to which the hook member is attached, and the rear end of the guide slot 10b is It is located behind the axis 11 of the.