JP4168658B2 - Rearview mirror for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle rear-view mirror, and more particularly to a remote-control vehicle rear-view mirror.
[0002]
[Prior art]
10 to 11 show a conventional remote-control vehicle rear-view mirror. The vehicle rear-view mirror 100 includes a mirror base 102 that fixes a mirror via a mirror holder (not shown), and a mirror base 102 that is tiltably mounted and adjusts the mirror surface angle of the mirror via the mirror base 102. And a drive unit 103.
[0003]
The mirror base 102 includes a mirror base main body 104, a mounting portion 105 provided at a substantially central portion of the mirror base main body 104, and having a spherical convex surface 105a and a spherical concave surface 105b on the back surface of the spherical convex surface 105a. And a pivot receiving portion 106 provided in the housing.
[0004]
On the other hand, the drive unit 103 includes a casing 107, a spherical concave surface 108 that is provided in the center of the casing 107, receives the spherical convex surface 105 a of the mirror base 102, and supports the mirror base 102 in a tiltable manner. (Not shown), a forward / backward rod 110 that is advanced / retracted from the casing 107 by the drive motor, and provided at the tip of the forward / backward rod 110, and is slidable within the pivot receiving portion 106 of the mirror base 102. And a substantially spherical pivot 111 to be mounted on the head.
[0005]
The mirror base 102 is attached to the drive unit 103 via attachment means including a hemispherical washer 113, a coil spring 114, and a screw 116 integrally provided with a flat washer. That is, due to the elastic restoring force of the coil spring 114 interposed between the hemispherical washer 113 and the flat washer 115, the spherical convex surface 105 a of the mirror base 102 is made into the spherical concave surface 108 of the drive unit 102 via the hemispherical washer 113. By making pressure contact, the mirror base 102 is attached to the drive unit 103 so as to be tiltable.
[0006]
[Problems to be solved by the invention]
However, in such a conventional vehicle rear-view mirror 100, the spherical convex surface 113a of the hemispherical washer 113 and the spherical concave surface 105b of the mirror base 102 are brought into contact with each other, and the spherical convex surface 105a of the mirror base 102 is contacted. Since the mirror base 102 is attached to the drive unit 103 so as to be tiltable by contacting the spherical concave surface 108 of the drive unit 103, the assembly can be relatively easily performed. Each must be managed with high accuracy.
[0007]
Further, since the spherical convex surface 105 of the mirror base 102 is pressed against the spherical concave surface of the drive unit 103 by the pressure contact member (semispherical washer 113), as shown in FIG. 11, the mirror base 102 is lifted at the tilting end point. The mirror surface angle of the mirror may not be accurately controlled.
[0008]
The present invention has been made based on such a conventional technique. Although it can be assembled relatively easily, it has fewer spherical surfaces that need to be managed and the mirror base rises from the drive unit at the end of tilting. An object of the present invention is to provide a vehicle rear-view mirror.
[0009]
[Means for Solving the Problems]
In the invention according to claim 1, in the vehicle rear-view mirror comprising a mirror base for fixing the mirror and a drive unit for tilting the mirror base,
The casing of the drive unit is provided with a substantially spherical pivot that constitutes a tilting fulcrum of the mirror base, while the mirror base is formed in a substantially cross-sectional hat shape, and the pivot is press-fitted into the inside of the mirror base. A pivot mounting portion having a ball seat surface that constitutes a sliding surface is provided,
The pivot mounting portion includes a cylindrical portion, a flange portion protruding outward from a base end of the cylindrical portion and continuing to the mirror base, and a plate-like flat portion closing the tip of the cylindrical portion. And the spherical seating surface is formed on the inner peripheral surface of the cylindrical portion.
A structure in which a spring member that has been press-fitted from the distal end side of the cylindrical portion to the proximal end portion of the cylindrical portion is externally fitted,
The outer peripheral surface of the cylindrical portion, a spherical portion whose diameter decreases gradually toward the front end side of the cylindrical portion along the spherical seat surface of the inner peripheral surface of the cylindrical portion, Oite the tip portion of the cylindrical portion and a ledge formed at a constant diameter in the axial direction of the continuous and cylindrical portion to the minimum diameter portion of the spherical portion,
The spring member is temporarily held on the shelf portion at the tip of the cylindrical portion in a state where the spring member is pushed and expanded from the original shape of the spring member .
It is characterized in that that.
[0010]
According to the first aspect of the present invention, a substantially spherical pivot constituting the tilting fulcrum of the mirror base is provided on the casing of the drive unit, and a pivot mounting portion on which the pivot is press-fitted is provided on the mirror base. Therefore, the mirror base can be tilted around the pivot. At this time, only two spherical surfaces need to be managed. In addition, since the conventional structure does not press the spherical convex surface (spherical concave surface) against the spherical concave surface (spherical convex surface) via the pressing member, it is possible to prevent the mirror base from being lifted at the driving end point.
[0011]
Here, since the spring member is externally fitted to the base end portion of the pivot mounting portion, there is no concern that the pivot mounting portion will fall off the pivot. Since the shelf portion for temporarily holding the spring member is provided at the tip of the outer peripheral surface of the portion, the mounting of the spring member is facilitated, and the structure can be assembled relatively easily as a whole.
[0012]
According to a second aspect of the present invention, in the vehicular rear-view mirror according to the first aspect, the pivot includes a chamfered portion at a tip end side thereof and a small protrusion at a substantially center of the chamfered portion. flat portion of the mounting portion is characterized in that have a gap between the pivot of the small projections and the pivot of the chamfered portion abuts against.
[0013]
According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the pivot is provided with a chamfered portion at the tip end side thereof and a small protrusion at the approximate center of the chamfered portion. Is provided with a flat portion on its tip side that abuts the small protrusion of the pivot and has a gap between the chamfered portion of the pivot, so that the mirror base is between the small protrusion and the chamfered portion and the flat portion. It is possible to tilt using the gap. Therefore, the vehicle rear-view mirror can be thinned along the pivot axis direction.
[0014]
According to a third aspect of the present invention, in the vehicle rear-view mirror according to the first or second aspect, a plurality of slits are provided at a base end portion of the cylindrical portion of the pivot mounting portion. is there.
[0015]
According to the invention described in claim 3, in addition to the effects of the inventions described in claims 1 and 2, a plurality of slits are provided in the base end portion of the cylindrical portion of the pivot mounting portion. It is possible to reduce the pressure input required for the operation.
[0016]
According to a fourth aspect of the present invention, in the vehicle rear-view mirror according to any one of the first to third aspects, the inner peripheral surface of the base end portion of the cylindrical portion of the pivot mounting portion is directed toward the periphery. The press-fitting guide surface is formed so as to gradually increase in diameter and guide the press-fitting of the pivot.
[0017]
According to the fourth aspect of the invention, in addition to the effects of the first to third aspects of the invention, the press-fitting guide surface is provided on the inner peripheral surface of the base end portion of the cylindrical portion of the pivot mounting portion. Also, it is possible to easily press fit the pivot into the pivot mounting portion.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 to 9 show an embodiment of a vehicle rear-view mirror of the present invention. FIG. 1 is an exploded perspective view of the vehicle rear-view mirror of this embodiment, and FIG. FIG. 3 is a bottom view showing the tilting state of the mirror base of the vehicle rear-view mirror, and FIG. 4 is a bottom view showing the tilting state of the mirror base of the rear-view mirror for the vehicle. 5 is a view showing a pivot mounting portion of the mirror base of the vehicle rear-view mirror, and FIGS. 6 to 9 are explanatory views of an assembly process of the mirror base and drive unit of the vehicle rear-view mirror. 8 and 9, the mirror base is not shown.
[0019]
In this embodiment, a vehicle rear-view mirror on the left side of the vehicle is illustrated and described. The vehicle rear-view mirror 1 of this embodiment includes a mirror (not shown), a mirror holder (not shown) that holds the mirror, a mirror base 2 that fixes the mirror via the mirror holder, a drive unit 3, And a spring member 4.
[0020]
The drive unit 3 includes a casing 31 formed by combining a pair of split cases 31a and 31b, a drive motor (not shown) for tilting up and down and a drive motor for tilting left and right built in the casing 31, An up-and-down tilt advance / retreat rod 34 that moves forward and backward from the casing 31 by a tilt drive motor, and a left-right tilt advance / retract rod 35 that moves forward and backward from the casing 31 by a left-right tilt drive motor. .
[0021]
The forward and backward rods 34 and 35 are configured as substantially spherical pivots 34b and 35b at their tip portions, and are rotatably mounted in pivot receiving portions 23 and 24 of the mirror base 2 described later.
[0022]
The casing 31 of the drive unit 3 is formed with a substantially spherical pivot 37 projecting integrally from the central portion of the casing 31 via a pivot shaft portion 36. This pivot 37 is press-fitted into a pivot mounting portion 22 of the mirror base 2 described later, and the mirror base 2 can be tilted with the pivot 37 as a tilting fulcrum.
[0023]
On the other hand, the mirror base 2 is formed in a mirror base main body 21 and a substantially cross-sectional hat shape at a substantially central portion of the mirror base main body 21, and the pivot 37 is press-fitted to the inner surface thereof, and a sliding surface with the pivot 37. And a pivot mounting portion 22 having a ball seat surface 22a. That is, the pivot mounting portion 22 includes a cylindrical portion 22A, a flange portion 22B protruding outward from the base end of the cylindrical portion 22A and continuing to the mirror base 21, and a plate shape that closes the distal end of the cylindrical portion 22A. The flat portion 22b is formed to have a substantially hat-shaped cross section as described above, and the spherical seat surface 22a is formed on the inner peripheral surface of the cylindrical portion 22A of the pivot mounting portion 22.
[0024]
The mirror base body 21 is provided with a pivot receiving portion 23 that engages with the pivot 34b of the advancing / retracting rod 34 for driving in the left / right direction of the drive unit 3, and is engaged with the pivot 35b of the advancing / retreating rod 35 for driving in the up / down direction. A pivot receiving portion 24 is provided. In the mirror base 2 of this embodiment, a pivot receiver for driving in the lateral direction is also provided on the opposite side of the pivot receiver 23 across the pivot mounting portion 22 so that it can be shared by the left and right vehicle rearview mirrors. A portion 25 is provided so that it can be combined with the right drive unit.
[0025]
Further, the mirror base body 21 of the mirror base 2 is provided with openings 26 and 26 having guide shafts 26b and 26b on both sides of the pivot mounting portion 22 so as to face the casing. 31 is provided with a pair of U-shaped guide portions 38, 38 for slidably holding the pair of guide shafts 26b, 26b, and engagement between the guide shafts 26b, 26b and the guide portions 38, 38. Thus, the mirror base 2 is prevented from rotating about the axial direction of the pivot shaft 16.
[0026]
Here, the pivot 37 of this embodiment is configured as a chamfered portion 37b in which an upper quadrant is cut out, and a substantially hemispherical small protrusion 37c is provided at the center of the chamfered portion 37b. . In addition, the pivot 37 of this embodiment is formed in a hollow shape, and ribs 37d extending radially from the center are formed therein. On the other hand, the pivot mounting portion 22 for mounting the pivot 37 is configured as a flat portion 22b having a gap S between the tip end side of the pivot 37 and the chamfered portion 37b of the pivot 37 while abutting the small projection 37c of the pivot 37. ing. Therefore, the mirror base 2 can be tilted using the gap S, and when the left / right tilting drive rod 34 is moved forward / backward by operating the left / right tilting drive motor, the mirror base 2 can be used as a mirror. The mirror surface tilts in the left-right direction (see FIGS. 3 to 4), and when the up-and-down tilt drive motor 35 is operated to move the up-and-down tilt advance / retreat rod 35, the mirror tilts in the up-down direction via the mirror base 2. It is supposed to be.
[0027]
Further, in the pivot mounting portion 22 of this embodiment, the diameter is gradually increased in a tapered shape toward the peripheral edge on the inner peripheral surface of the pivot insertion end portion 22c as the “base end portion of the pivot mounting portion”. A press-fitting guide surface 22e is provided, and the press-fitting of the pivot 37 is guided by the press-fitting guide surface 22e. Further, four slits 22d are formed in the pivot insertion end portion 22c along the axial direction of the pivot shaft 36, and the pressure input required for press-fitting the pivot 23 to the pivot mounting portion 22 is reduced by the slits 22d. Has been. Since the pivot mounting portion 22 of this embodiment is configured such that the pivot 37 is press-fitted and fitted, the sliding surface 22a has a smaller diameter than the maximum diameter of the pivot 37 on the pivot insertion end portion 22c side. A constricted portion 22f is formed.
[0028]
A spring member 4 is externally fitted on the outer peripheral surface of the pivot insertion end 22c to prevent the mirror base 2 from falling off the pivot 37 due to an unexpected large impact. The spring member 4 is made of metal and is formed of a ring-shaped wire having free ends 4c and 4c that can be expanded and deformed with the closed end 4b as a fulcrum. The spring member 4 also has an effect of making the sliding torque between the pivot 37 and the pivot mounting portion 22 constant.
[0029]
In order to facilitate the external fitting operation of the spring member 4, in this embodiment, the spring member 4 is slightly expanded from the original shape on the outer peripheral surface of the distal end portion of the pivot mounting portion 22. Shelf 22h that can temporarily hold 4 is provided. That is, the outer peripheral surface of the cylindrical portion 22A of the pivot mounting portion 22 has a spherical portion 22j that gradually decreases in diameter toward the tip end side of the cylindrical portion 22A along the spherical seat 22a of the inner peripheral surface of the cylindrical portion 22, and a cylindrical portion. A shelf portion 22h that is continuous with the minimum diameter portion of the spherical surface portion 22j and has a constant diameter toward the axial direction of the cylindrical portion 22 at the tip portion of the portion 22 is configured.
[0030]
Now, the vehicle rear-view mirror constructed in this way is assembled as follows (see FIGS. 6 to 9).
[0031]
First, as shown in FIG. 6, the pivot insertion end portion 22c of the pivot mounting portion 22 of the mirror base 2 is made to face the pivot 37 of the drive base 3 and the pivots 34b of the advance and retreat rods 34, 35 using a dedicated jig. The pivot receiving portions 23 and 24 are opposed to 35b.
[0032]
Next, as shown in FIG. 7, the pivot 37 is press-fitted to the pivot mounting portion 22, and the pivots 34 b and 35 b of the forward and backward rods 34 and 35 are press-fitted to the pivot receiving portions 23 and 24. At this time, the press-fitting of the pivot 37 is guided by the press-fitting guide surface 22e of the pivot insertion end 22c even in a blind operation.
[0033]
Then, from this state, as shown in FIG. 8, the spring member 4 is fitted into the shelf 22h provided on the outer peripheral surface of the distal end portion of the pivot mounting portion 22, and the spring member 4 is temporarily held by the shelf 22h.
[0034]
Next, the temporarily held spring member 4 is moved over the locking projection 22g by the press-fitting jig and is press-fitted into the base end portion 22c of the pivot mounting portion 22, and the spring member 4 is inserted into the base end portion 22c as shown in FIG. Assembling is completed with 4 being fitted.
[0035]
According to the vehicle rear-view mirror 1 of such an embodiment, the substantially spherical pivot 37 is provided integrally with the casing 31 of the drive unit 3, and the pivot mounting portion 22 in which the pivot 37 is press-fitted into the mirror base 2 is provided. Since the structure is provided, only two spherical surfaces need to be managed. Moreover, since it is not the structure which presses a spherical convex surface (spherical concave surface) to a spherical concave surface (spherical convex surface) via a pressing member like the conventional one, the mirror base 2 can be prevented from being lifted at the driving end point (see FIGS. 3 to 4). .
[0036]
Further, since the spring member 4 is externally fitted to the base end portion 22c of the pivot mounting portion 22, the pivot mounting portion 22 does not fall off the pivot 37. However, the temporary mounting of the spring member 4 at the shelf portion 22h is prevented. The press-fitting work of the spring member 4 is facilitated by the holding.
[0037]
That is, when the mirror base 2 is mounted on the drive unit 3, the mounting is completed simply by pressing the mirror base 2 toward the drive unit 3 after positioning at the predetermined mounting position, and the spring member 4 is mounted. In this case, the spring member 4 is temporarily held on the shelf portion 22h, and then the spring member 4 is simply pressed toward the base end portion 22c of the pivot mounting portion 22 to complete the mounting. There is also an effect that can be automated.
[0038]
At this time, unlike the press-fitting by manual operation, the spring member 4 is not locked at a wrong position due to insufficient press-fitting, which contributes to quality improvement.
[0039]
According to the vehicle rear-view mirror 1 of this embodiment, the pivot 37 is provided with the chamfered portion 37b, and the chamfered portion 37b is provided with a small projection 37c. Since the flat portion 22b having the gap S between the chamfered portion 37b and the chamfered portion 37b is provided, the mirror base 2 is kept in the gap while the vehicle rear-view mirror 1 is thinned along the axial direction of the pivot shaft 36. It is possible to tilt using S.
[0040]
According to the vehicle rear-view mirror 1 of this embodiment, since the pivot insertion end 22c is provided with a plurality of slits 22d, the pivot insertion end 22c is expanded when the pivot 37 is press-fitted. It is possible to reduce the pressure input required to press-fit the pivot 37 into the pivot mounting portion 22 by being deformed.
[0041]
Further, according to the vehicle rear-view mirror 1 of this embodiment, since the press-fit guide surface 22e for guiding the press-fit of the pivot 37 is provided at the pivot insertion end portion 22c of the pivot mounting portion 22, the pivot 37 can be used even in a blind operation. Can be easily press-fitted into the pivot mounting portion 22.
[0042]
【The invention's effect】
According to the first aspect of the present invention, the substantially spherical pivot that constitutes the tilt fulcrum of the mirror housing is provided in the casing of the drive unit, and the pivot mounting portion into which the pivot is press-fitted is provided in the mirror base. Therefore, only two spherical surfaces need to be managed. In addition, since it is not a structure that presses the spherical convex surface (spherical concave surface) against the spherical concave surface (spherical convex surface) via a pressing member as in the past, it is possible to prevent the mirror base from being lifted at the driving end point, and to control the mirror surface even at the driving end point. Can be done accurately.
[0043]
Here, since the spring member is externally fitted to the base end portion of the pivot mounting portion, there is no concern that the pivot mounting portion will fall off the pivot. Since the shelf for temporarily holding the spring member is provided at the distal end portion of the outer peripheral surface of the mounting portion, the mounting of the spring member is facilitated, and the structure can be assembled relatively easily as a whole.
[0044]
In addition, since the spring member is temporarily held by the shelf portion, the structure is easy to press-fit with a jig, which makes it possible to press-fit with sufficient pressure input, and the spring member is locked at an incorrect position. Contributes to quality improvement.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a vehicle rear-view mirror of this embodiment.
FIG. 2 is an assembly diagram including a broken portion of the rear-view mirror for the vehicle.
FIG. 3 is a view showing a tilting state of a mirror base of the vehicle rear-view mirror.
FIG. 4 is a view showing a tilting state of a mirror base of the vehicle rear-view mirror.
FIG. 5 is a view showing a pivot mounting portion of a mirror base of the vehicle rear-view mirror, wherein a partial view a is a front view, a partial view b is a bottom view including a partially broken portion, and a partial view c is a sectional view. .
FIG. 6 is an explanatory diagram of an assembly process of the mirror base and the drive unit of the vehicle rear-view mirror, and shows a state before the mirror base is mounted.
FIG. 7 is an explanatory diagram of an assembly process of the mirror base and the drive unit of the vehicle rear-view mirror, and shows a state after the mirror base is mounted.
FIG. 8 is an explanatory view of an assembly process of a mirror base and a drive unit of the vehicle rear-view mirror, and showing a temporarily held state of a spring member.
FIG. 9 is an explanatory view of an assembly process of a mirror base and a drive unit of the vehicle rear-view mirror, and showing a mounting state of a spring member.
FIG. 10 is a view showing a conventional rear-view mirror for a vehicle.
11 is an exploded view showing a main part of the vehicle rear-view mirror in FIG. 10;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle rear-view mirror 2 Mirror base 3 Drive unit 22 Pivot mounting part 22a Ball seat surface 22b Flat part 22c Pivot insertion end part (base end part of pivot mounting part)
22d Slit 22e Press-fit guide surface 22h Shelf 31 Casing 37 Pivot 37b Chamfered portion 37c Small protrusion S Gap

Claims (4)

In a vehicle rear-view mirror comprising: a mirror base that fixes a mirror; and a drive unit that tilts the mirror base.
The casing of the drive unit is provided with a substantially spherical pivot that constitutes a tilting fulcrum of the mirror base, while the mirror base is formed in a substantially cross-sectional hat shape, and the pivot is press-fitted into the inside of the mirror base. A pivot mounting portion having a ball seat surface that constitutes a sliding surface is provided,
The pivot mounting portion includes a cylindrical portion, a flange portion protruding outward from a base end of the cylindrical portion and continuing to the mirror base, and a plate-like flat portion closing the tip of the cylindrical portion. And the spherical seating surface is formed on the inner peripheral surface of the cylindrical portion.
A structure in which a spring member that has been press-fitted from the distal end side of the cylindrical portion to the proximal end portion of the cylindrical portion is externally fitted,
The outer peripheral surface of the cylindrical portion, a spherical portion whose diameter decreases gradually toward the front end side of the cylindrical portion along the spherical seat surface of the inner peripheral surface of the cylindrical portion, Oite the tip portion of the cylindrical portion A shelf that is continuous with the smallest diameter part of the spherical part and is formed with a constant diameter in the axial direction of the cylindrical part ,
The vehicular rear-view mirror is characterized in that the spring member is temporarily held on a shelf portion at a tip portion of the cylindrical portion in a state where the spring member is pushed and expanded from an original shape of the spring member . The vehicle rear-view mirror according to claim 1,
The pivot is provided with a chamfered portion on the tip side thereof and a small protrusion at a substantially center of the chamfered portion,
The rear mirror for a vehicle according to claim 1 , wherein the flat portion of the pivot mounting portion is in contact with a small protrusion of the pivot and has a gap between the chamfered portion of the pivot. The vehicle rear-view mirror according to claim 1 or 2,
A rear-view mirror for a vehicle, wherein a plurality of slits are provided at a base end portion of a cylindrical portion of the pivot mounting portion. The vehicle rear-view mirror according to any one of claims 1 to 3,
A vehicular rearview mirror characterized in that a press-fitting guide surface is provided on the inner peripheral surface of the base end portion of the cylindrical portion of the pivot mounting portion so as to gradually increase in diameter toward the peripheral edge and guide the press-fitting of the pivot.

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