JPH0324376B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a storage mechanism for tiltably supporting a mirror housing supporting a mirror body in a retractable door mirror.

[Background of the invention]

Since door mirrors are installed protruding from the sides of the vehicle, there is a chance that the vehicle will collide with obstacles while driving.
There is also the problem that the door mirrors get in the way when the vehicle passes through a place with a narrow distance from obstacles, such as when driving in a garage.

To solve the above problems, retractable door mirrors with a buffer function are used.

FIG. 1 is an explanatory diagram schematically depicting a horizontal cross section of a conventionally commonly used retractable door mirror with a buffering function, 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, and its front end is connected to a front shaft 6.
The rear end portion is rotatably attached to the mirror housing 3 by a rear shaft 7, and to the mirror base 2 by a rear shaft 7, respectively.

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 retractable door mirror configured as described above receives an external force from the front as shown by arrow A, the mirror housing 3 tilts rearward as shown in FIG.
Also, when external force is applied from behind as shown by arrow B, the third
Lean forward as shown. The above-mentioned forward and forward tilting operations are performed by tension spring 8.
Since this is performed while resisting the urging force of the tension spring 8, the impact of the external force is absorbed by the tension spring 8 and alleviated.

As described above, by holding the mirror housing 3 in a backwardly tilted position, the door mirror does not get in the way when passing through a place with a narrow distance from obstacles, such as when parking in a garage.

However, since the mirror housing 3 is pressed against the mirror base 2 by the tension spring 8, when the mirror housing 3 is tilted backward as shown in FIG. When tilting forward as shown in FIG. 3, the abutting portion D near the front shaft 6 will be galled. This galling appears visually when the product is in its normal position (Fig. 1), and it impairs its commercial value.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and
An object of the present invention is to provide a storage mechanism in which the mirror housing does not come into sliding contact with the mirror base and there is no risk of galling when the mirror housing is tilted in a retractable door mirror having a buffer function.

[Summary of the invention]

In order to achieve the above object, the storage mechanism of the present invention supports a mirror housing so as to be tiltable with respect to a mirror base, and is equipped with a spring that biases the mirror housing in a direction to maintain a normal posture. In the door mirror, the mirror housing is supported on a floating bearing member via a link, the dairy bearing member is supported on a mirror base via a link, and the floating bearing member is supported on the floating bearing member. is provided with four bearing holes, a fixed bearing bracket having two bearing holes fixed to the mirror housing, and two bearing holes of the four bearing holes of the baby bearing member. are connected by two links to form a four-axis quadrilateral link mechanism, including a fixed bearing bracket having two bearing holes fixed to the mirror base, and four of the floating bearing members.
two of the bearing holes are connected by two links to form a four-axis four-sided link mechanism, and the two sets of four-axis four-sided link mechanisms Each of them is characterized in that at least one pair of the two opposing sides has different lengths.

In the present invention, the fixed bracket refers to a bearing bracket fixed to the mirror base or mirror housing, and the floating bearing member refers to a bearing member that is not fixed to either the mirror base or the mirror housing.

[Embodiments of the invention]

Next, an embodiment of the present invention will be described with reference to FIGS. 4 to 14.

FIG. 4 is a partially cutaway perspective view of one embodiment of the storage mechanism of the present invention. In the figure, 2 is a mirror base, 3 is a mirror housing, and 8 is a tension spring. This tension spring 8 is attached to the mirror base 2 via a spring hanger 9.

10 is a fixed bearing bracket fixed to the mirror base 2, and 11 is a fixed bearing bracket fixed to the mirror housing 3. A floating bearing member 12 is constructed separately from both of the above fixed bearing brackets 10 and 11, and both of the above fixed bearing brackets 10 and 1
Position it in the middle of 1.

FIG. 5 is an exploded perspective view of the storage mechanism of this embodiment.
10 is the aforementioned fixed bearing bracket on the base side;
1 is the fixed bearing bracket on the housing side mentioned above;
12 is the aforementioned milk bearing member.

The above three members are connected by links as follows. Since this embodiment is configured vertically symmetrically, FIG. 5 mainly shows the upper half of the connection relationship by links.

Links 13, 13, and 14 are constructed, and bearing holes 13a, 13c, 14d, and
14b is provided.

Bearing hole 1 in the fixed bearing bracket 10 on the base side
0a and 10b are provided, and the floating bearing member 12 is provided with bearing holes 12c and 12d.

Rivet 1 the bearing holes 10a and 13a.
5, and the bearing holes 10b and 14b are connected by pin 1.
6, the bearing holes 13c and 12c are pivotally connected with a rivet 17, and the bearing holes 14d and 12d are pivotally connected with a pin 18 to form a four-axis four-sided link mechanism. The fixed bearing bracket 10 and the floating bearing member 12 are connected by links 13 and 14.

As shown in FIG. 5, the floating bearing member 12 has four bearing holes 12c, 12d, 12e,
12f, the number of bearing holes provided in this floating bearing member 12 is not limited to four when carrying out the present invention, and multiples of four shaft holes may be provided. can.

FIG. 6 is a horizontal sectional view showing the above-mentioned link mechanism, and for ease of reading, the floating bearing member 12 is
is drawn with a chain line.

4 shafts (rivets or pins) 15, 16, 1
The length of each side of the quadrilateral formed by 7 and 18 is different. When practicing the present invention, at least four sides are not made equal in length. That is, at least one pair of the two opposing sides has different lengths.

As a result, when a rotational force is applied to the floating bearing member 12 in the clockwise direction shown in the figure, the floating bearing member 12
Due to the action of the axis scalene link, as shown in FIG. 7, it rotates clockwise while moving away from the base 2. In this manner, the action of separating the floating bearing member 12 from the mating member (member connected via the link) as the floating bearing member 12 rotates is the basic principle that produces the effects of the present invention, which will be described in detail later.

FIG. 8 is an explanatory diagram that graphically analyzes the locus of the mirror housing in this embodiment when it is tilted from the normal posture 3 shown by the broken line to the forward tilted posture 3' shown by the chain line.

The small circles 15 and 16 represent fixed nodes provided on the mirror base 2, and the black dots 17' and
Reference numerals 18' each represent a movable joint provided on the floating bearing member 12 when moving together with the mirror housing 2.

As the mirror housing 3 rotates forward, the movable joint 17' moves to a point 17'' as shown by the circular arrow A centered on the fixed joint 15, and the movable joint 18' moves to a point 18 as shown by the circular arc arrow B centered on the fixed joint 16. ″Move to point.

3 _-1 is the front end of the portion where the mirror housing 3 in the normal posture (broken line) is in contact with the mirror base, and is a portion where conventionally galling is likely to occur when the mirror housing 3 is tilted forward.

As the movable joints 17' and 18' move in the directions of arrows A and B, point _3-1 separates from the mirror base 2 as shown by arrow C. Therefore, there is no risk of galling occurring.

As can be easily understood from this figure, point 3 _-1 cannot move from the illustrated point in the direction of the imaginary arrow D.
That is, the mirror housing 3 cannot be tilted rearward only by the link mechanism shown in FIG.

Similar to the four-axis scalene link mechanism described above, as shown in FIG. 5, bearing holes 12e and 12f are provided in the floating bearing member 12, and bearing holes 11g and 11h are provided in the fixed bearing bracket 11 on the housing side, respectively.

Links 19 and 20 of unequal length are formed, and bearing holes 19e, 19g and 20f are provided at both ends of the links, respectively.
20h, bearing holes 19e and 12e, bearing holes 19g
and 11g, 20f and 12f, 20h and 11h
Rivets 21, 22,
They are pivotally connected by pins 23 and 24 to form a scalene four-axis link mechanism.

FIG. 9 is a horizontal sectional view showing a state in which the floating bearing member 12 and the fixed bearing bracket 11 on the housing side are connected.

As mentioned above, the floating bearing member 12 is supported by the fixed bearing bracket 10 on the base side via a scalene 4-axis link mechanism (not shown), and can be rotated in the counterclockwise direction (backward tilting direction). It is a structure that cannot be used. Therefore, when the fixed bearing bracket 11 on the housing side fixed to the mirror housing 3 receives a rotational force in the counterclockwise direction, the floating bearing member 12 does not rotate with respect to the mirror base 2, as shown in FIG. The fixed bearing housing 11 on the housing side with respect to the floating bearing member 12 is moved to the left in the figure by the action of the four-axis unequal four-sided link mechanism constituted by the links 19 and 20. (While moving in the direction away from mirror base 2)
Rotates counterclockwise in the figure.

The fixed bearing bracket 11 on the housing side cannot rotate relative to the floating bearing member 12 in the clockwise direction in the figure.

FIG. 11 is an explanatory drawing that graphically analyzes the locus when the mirror housing 3 is tilted backward from the normal posture (broken line) to a (backward tilted posture) 3'' shown by the chain line.

21' and 23' represent fixed nodes provided on the mirror base 2. Reference numerals 22' and 24' represent movable joints provided on the mirror housing 3, and arcuate arrows H and F indicate loci of the movable joints 22' and 24', respectively. As the mirror housing 3 tilts backward, the point 3 at the rear end of the abutment part of the mirror housing 3 against the mirror base 2
_-2 draws a locus in the direction away from the mirror base 2 as shown by arrow T.

FIG. 12 is a sectional view of a door mirror equipped with a storage mechanism according to this embodiment. 25 is a mirror body.

When a forward external force is applied to the mirror housing 3 as shown by arrow A, the mirror housing 3
As shown in Figure 3, it tilts forward to perform a buffering function. During this tilting, the floating bearing member 12 moves in a direction away from the mirror base 2 (to the left in the figure) and rotates clockwise in the figure, due to the action explained with reference to FIG. Therefore, the floating bearing member 12
The mirror housing 3, which is supported via links 19 and 20, tilts forward (upward in the figure) while separating from the mirror base 2. Therefore, there is no risk of the mirror housing 3 and mirror base 2 sliding and galling.

When an external force is applied rearward as shown by arrow B in FIG. 12, the fixed bearing bracket 11 on the housing side
rotates counterclockwise in the figure while separating from the mirror base 2 due to the action explained with reference to FIG. Therefore, the fixed bearing bracket 1 on the housing side
1, the mirror housing 3 is separated from the mirror base 2 and tilted rearward (downward in the figure) to the state shown in FIG. 14. Therefore, there is no risk of the mirror base 2 and mirror housing 3 sliding and galling. When the mirror housing 3 collides with an obstacle, the above-mentioned tilting operation serves as a buffer. Also, if you apply force with your hand to tilt it, the door mirror will not get in the way when passing near an obstacle.

〔Effect of the invention〕

As detailed above, according to the storage mechanism of the present invention, when the mirror housing of a retractable door mirror equipped with a buffer function is tilted, the mirror housing does not come into sliding contact with the mirror base, which may cause galling. It has the excellent practical effect of being free of

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram schematically depicting a horizontal cross section of a conventional retractable door mirror, and FIGS. 2 and 3 are similarly explanatory diagrams of the operation. 4 to 14 show an embodiment of the storage mechanism of the present invention, FIG. 4 is a partially cutaway perspective view in an assembled state, FIG. 5 is an exploded perspective view,
Figure 6 is a plan view of the link mechanism connecting the fixed bearing bracket on the base side and the floating bearing member, Figure 7 is an explanatory diagram of the same operation, Figure 8 is an analysis diagram of the same, and Figure 9 is the floating bearing member and housing. A plan view of the link mechanism connecting the side fixed bearing bracket, Fig. 10 is an explanatory diagram of the same operation, Fig. 11 is an analysis diagram of the same, Fig. 12 is a horizontal cross-sectional view in the normal posture, and Fig. 13 is the forward tilted posture. FIG. 14 is a horizontal sectional view in a backward tilted position. 2...Mirror base, 3...Mirror housing, 8...Tension spring, 10...Fixed bearing bracket on the base side, 11...Fixed bearing bracket on the housing side, 12...Floating bearing member, 13, 14... ...Link, 15...Rivets,
16...Pin, 17...Rivet, 18...Pin, 19,20...Link, 21,22,23...
...Rivets, 24...pins.

Claims (1)

[Scope of Claims] 1. A retractable door mirror in which a mirror housing is tiltably supported with respect to a mirror base and is provided with a spring that biases the mirror housing in a direction to maintain a normal posture, comprising: The housing is supported on a floating bearing member via a link, and the floating bearing member is supported on a mirror base via a link, and the floating bearing member is provided with four bearing holes. A fixed bearing bracket having two bearing holes fixed to the mirror housing and two of the four bearing holes of the floating bearing member are connected by two links. A four-axis four-sided link mechanism is formed, consisting of a fixed bearing bracket having two bearing holes fixed to the mirror base, and four of the floating bearing members.
two of the bearing holes are connected by two links to form a four-axis four-sided link mechanism, and the two sets of four-axis four-sided link mechanisms Each door mirror storage mechanism is characterized in that at least one pair of two opposing sides has different lengths.