JP2002178833A - Mirror device for vehicle, and vibrationproof device used for the mirror device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mirror device for vehicle capable of having an effective vibrationproof effect on a vibration in a wide range of a frequency with a simple structure. SOLUTION: A storage space 42 is secured by a mass housing 44 provided in a mirror housing 16, and an independent mass member 46 is independently and displaceably disposed in the storage space 42. The independent mass member 46 is directly and elastically allowed to abut on the mass housing 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mirror device for vehicles including four-wheeled vehicles such as passenger cars, buses and trucks, and two-wheeled vehicles such as motorized bicycles and motorcycles, and to a vibration isolating device used for the mirror device. Etc. The present invention relates to a technique for reducing vibrations at the same time to maintain a good mirror view.

[0002]

2. Description of the Related Art In vehicles such as four-wheeled vehicles and two-wheeled vehicles, in order to secure a view in an area where direct viewing is difficult,
Various types of mirror devices, such as fender mirrors, door mirrors, and rearview mirrors, and front mirrors, side mirrors, rear mirrors, and vanity mirrors, each of which can obtain a field of view using a mirror, are employed. In these mirror devices, generally, a mirror housing in which a mirror is mounted is attached to an appropriate number of support members projecting from the vehicle body, so that the mirror housing is projected from the vehicle body by the support member and supported. Structure.

However, in such a mirror device, in addition to the large mass of the mirror housing portion located away from the vehicle body, the mirror device has a substantially cantilever-like support structure, which causes a design and structural reasons. Therefore, it is also difficult to increase the rigidity of the support member, and it is extremely difficult to take countermeasures against vibration because the magnitude and frequency of the vibration exerted by the vehicle running state change.

To cope with such a problem, Japanese Patent Publication No. 1-12992 and Japanese Patent Publication No.
No. 5, Japanese Patent Publication No. 6-53476, Japanese Utility Model Publication 7-1
Various anti-vibration measures have been proposed in, for example, Japanese Patent No. 2176, but all of them are dynamic dampers in which a mass member is directly fixed to a mirror housing or a mirror via a spring member and elastically supported. Therefore, since the vibration damping effect is obtained by utilizing the resonance action of the mass-spring system, it is difficult to obtain a sufficient vibration damping effect unless the mass mass is increased. There is a problem that an effective vibration damping effect can be exerted only for vibration in a specific narrow frequency range specified by mass and spring elasticity.

In addition, in a dynamic damper having a conventional structure in which a mass member is directly fixed to a mirror housing or a mirror via a spring member and elastically supported, the deformation of the spring member depends on the vibration direction of the mass member. Changes to compression / tensile or shear, resulting in a spring constant,
As a result, since the resonance frequency is greatly changed, there has been a problem that an effective vibration damping effect can be exhibited only in principle in one-way vibration specified in advance.

[0006]

The present invention has been made in view of the above-mentioned circumstances, and a problem to be solved is to provide a simple structure and effective protection against vibration in a wide frequency range. An object of the present invention is to provide a vehicle mirror device having a novel structure capable of exhibiting a vibration effect and a vibration isolator used for the mirror device.

[0007]

An embodiment of the present invention which has been made to solve such a problem will be described below. The components employed in each of the embodiments described below can be employed in any combination as possible. In addition, aspects or technical features of the present invention are not limited to those described below, but are described in the entire specification and drawings, or based on the invention ideas that can be understood by those skilled in the art from the descriptions. It should be understood that it is recognized on the basis of.

That is, the present invention relates to a mirror device for a vehicle, wherein a mirror housing having a mirror mounted thereon is supported by a support member fixedly mounted to the vehicle body so as to protrude from the vehicle body. In the mirror device for use, an accommodation space is formed by a rigid mass housing provided directly to the mirror or indirectly via the mirror housing, and an independent mass member is accommodated and arranged in the accommodation space, and the independent mass member is arranged. By disposing the mass member opposite to the inner surface of the housing space of the mass housing in a non-adhesive manner so as to be relatively displaceable, at the time of vibration input, the independent mass member makes at least one vibration It is characterized in that it can be directly and elastically contacted in the direction.

In the vehicle mirror device having the structure according to the present invention, when vibration is input, the independent mass member is directly connected to the mirror or the mass housing attached to the mirror housing. And it is elastically contacted. As a result, based on the contact (contact) of the independent mass member with the mass housing, an effective vibration damping effect is exerted on the mirror housing and the mirror.
The vibration of the mirror can be suppressed over a wide frequency range, whereby the field of view of a mirror device such as a rearview mirror can be stably and effectively secured.

Further, in the vehicle mirror device according to the present invention, since the mass can be made compact as compared with the conventional dynamic damper type vibration damping device, an effective vibration damping effect can be obtained with a small mass mass. Can be obtained, and a space for disposing the mass housing can be advantageously secured.

Further, in the present invention, the mass housing can be formed of, for example, a metal material such as iron or aluminum alloy, a synthetic resin material, or the like. In particular, the rigidity for supporting the independent mass member is limited. In order to advantageously secure the vibration effect, a rigid material having an elastic modulus of 5 × 10 ⁴ MPa or more is suitably used.

In the present invention, the independent mass member is
The whole can be formed of rubber elastic body, synthetic resin material, or foamed material thereof, or a rigid material such as metal can be fixed for reinforcement. It is also possible to form with a rigid material of high specific gravity, when forming the independent mass member with a rigid material, at least one of the contact surface of the independent mass member and the contact surface of the mass housing,
It is desirable to be formed of an elastic material such as a rubber elastic body or a synthetic resin.

Further, in the present invention, in consideration of the running state of the vehicle, it is desirable that the independent mass member be directly and elastically brought into contact with the mass mass housing at least in the vertical direction and the vehicle longitudinal direction. Thus, effective vibration damping effects can be obtained in both vertical and vehicle front-rear vibrations, which tend to be problems in general vehicles.

Further, in the present invention, at least one of the contact surfaces of the independent mass member and the mass housing is provided with an ASTM standard D22 in order to reduce the contact sound and advantageously obtain a vibration damping effect.
It is desirable that the Shore D hardness of 40 is set to preferably 80 or less, more preferably 20 to 40.

Further, in the present invention, at least one of the contact surfaces of the independent mass member and the mass housing has a compression elastic modulus of preferably 1 to 10 ^{4 in} order to reduce the contact sound and improve the vibration damping effect. MPa, more preferably 1 to 10 ³ MP
In a, the loss tangent (tan δ) is preferably 10 ⁻³ or more, more preferably 0.01 to 10.

Further, in the present invention, an independent mass member having a spherical outer peripheral surface is preferably employed, whereby the sliding contact area of the independent mass member with the mass housing at the time of jumping displacement is reduced, and In addition, since the independent displacement resistance is also reduced, the independent mass member is efficiently jumped and displaced when a vibration is input, and the independent mass member hits (contacts) the mass housing.
Therefore, the vibration damping effect based on can be exhibited more efficiently.

Further, by employing the independent mass member having such an outer peripheral surface shape, the directivity of the independent mass member in the mass housing is eliminated, so that the contact state of the independent mass member with the mass housing is stabilized. As a result, the vibration damping effect exerted based on the hitting (contact) of the independent mass member against the mass housing can be stably exhibited.

Further, by adopting the independent mass member having such an outer peripheral surface shape, it is not necessary to consider the direction in which the mass housing is mounted on the vehicle mirror device. Can be improved.

Further, in the present invention, in a vehicle mirror device having a longitudinal mirror, it is desirable that the independent mass member is formed in a longitudinal rod shape, thereby reducing the space formed by the mirror and the mirror housing. In addition to this, the mass of the independent mass member can be advantageously secured.

It is desirable that the independent mass member having such a shape is disposed so that its longitudinal direction is substantially horizontal and extends in the lateral direction of the vehicle, that is, in the lateral direction of the vehicle. This makes it possible to obtain a more effective vibration damping effect against vibrations in the vertical direction and in the vehicle front-rear direction, which are likely to become problematic.

Further, in the present invention, the mass of the single unit in the independent mass member is desirably set to 10 to 1000 g, more preferably 50 to 500 g. That is, the mass of the independent mass member alone is 1000 g or less,
More preferably, when the weight is 500 g or less, the jumping displacement of the independent mass member at the time of vibration input can be easily or efficiently generated, and by setting the weight to 10 g or more, more preferably 50 g or more, Based on the contact with the mass housing, a more effective vibration damping effect can be obtained. When a plurality of independent mass members are provided, the mass of each single independent mass member is set as described above.

In the present invention, the maximum clearance between the independent mass member and the abutment surface of the mass housing (the reciprocating movable distance of the independent mass member) is preferably set to 0.1 to obtain an effective vibration damping effect. It is 2 to 1.6 mm, more preferably 0.2 to 1.0 mm.

Further, in the present invention, the total mass of the independent mass member is 5 to 10% of the mass of the mass portion in the vibration system constituted by the mirror device, that is, generally 5 to 10% of the mass of the mirror housing portion including the mirror. It is desirable to be set so that If the total mass of the independent mass member is less than 5% of the mass of the mirror housing portion including the mirror, it may be difficult to obtain an effective vibration damping effect,
On the other hand, if it exceeds 10%, the weight of the entire apparatus becomes a problem. When the vehicle mirror device has a plurality of independent mass members, it refers to the total mass of the plurality of independent mass members.

On the other hand, a feature of the present invention relating to a vibration isolator used in a vehicle mirror device is that a mirror housing in which a mirror is mounted is attached to a support member projecting from a vehicle body. An anti-vibration device mounted on a vehicle mirror device, wherein a housing space is formed by a rigid mass housing that is fixed to the mirror directly or indirectly via the mirror housing, and is independent of the housing space. The mass member is accommodated and arranged, and the independent mass member is opposed to the inner surface of the mass housing of the mass housing by non-adhesion so as to be relatively displaceable. That is, it is possible to directly and elastically contact in at least one vibration input direction to be damped.

In the vibration isolator having the structure according to the present invention, when vibration is input to the mass housing, the independent mass member is brought into direct and elastic contact with the mass housing. Based on this, the vibration damping effect can be exerted. Therefore, by attaching such a vibration isolator directly to the mirror or indirectly via the mirror housing, it is possible to suppress the vibration of the mirror over a wide frequency range based on the vibration damping effect as described above. As a result, the field of view of the vehicle mirror device can be stably and advantageously secured.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

First, FIG. 1 schematically shows the inside of a truck cabin 12 as a vehicle body to which a vehicle mirror device 10 according to a first embodiment of the present invention is attached. , 3 show a vehicle mirror device 10. The vehicle mirror device 10 has a structure in which a mirror housing 16 to which a mirror 14 is attached is cantilevered on a ceiling of the cabin 12 by a stay 18 as a support member, and the mirror 14 is rearwardly supported by the mirror 14 (FIG. 1). The center-right view is secured.

More specifically, the mirror housing 16 is
It is formed of a rigid material such as a synthetic resin material, and has a rectangular shallow dish shape extending as a whole in a vehicle lateral direction (a direction perpendicular to the paper surface of FIG. 1). In addition, on the inner peripheral surface of the peripheral wall portion, a supporting protrusion 20 projecting inward at a predetermined height is
It is formed annularly over the entire circumference in the circumferential direction. The mirror 14 has a rectangular plate shape corresponding to the opening of the mirror housing 16, is fitted in the opening of the mirror housing 16, and is disposed so as to cover the opening of the mirror housing 16. ing. The mirror 14 has a supporting projection 2 of the mirror housing 16 at an outer peripheral edge thereof.
0 and is positioned by being surrounded by the peripheral wall of the mirror housing 16 and further fixed from the front by a rectangular frame-shaped fixing frame 22 which is externally fitted and fixed to the opening of the mirror housing 16. Support projection 20
It is being pressed towards. Thereby, the mirror 14
It is fixedly attached to the opening of the mirror housing 16 so as not to come out. In addition, since the mirror 14 is provided in the opening of the mirror housing 16, a space 24 that is isolated from the outside is formed between the mirror housing 16 and the mirror 14.

Further, a mounting boss 26 is integrally formed at the center of the bottom wall of the mirror housing 16. The mounting boss portion 26 has a rectangular block shape, and has an inner protruding portion 28 slightly protruding inward of the mirror housing 16 and an outer protruding portion 28 largely protruding outside of the mirror housing 16. The projection 30 is provided. A fitting recess 32 having a spherical inner surface is formed in the outer projection 30, and the tip of the stay 18 is attached to the fitting recess 32 so as to be slidable on a spherical surface.

That is, the stay 18 has a rod shape curved substantially in the shape of a fishhook, and is fixed to a roof structure member 34 or a cabin ceiling structure member 36 of an automobile by bolts or the like at an upper base end portion thereof. As a result, a fitting ball portion 38 having a spherical outer peripheral surface shape is integrally formed at a lower end portion thereof. The fitting ball portion 38 is fitted into the fitting recess 32 of the mirror housing 16 so as to be able to slide spherically, so that the mirror housing 16 is connected to the vehicle bodies 34 and 36 via the stay 18. Under such a supported state, the mirror housing 16 is provided with a ball joint mechanism formed in cooperation with the fitting concave portion 32 and the fitting ball portion 38 so that the center of the fitting ball portion 38 is formed. It is supported so as to be freely rotatable around a point within a predetermined range. As is well known, such a mirror housing 16 is fixedly set and used at a predetermined rotation position where the longitudinal direction is substantially horizontal.

On the other hand, an anti-vibration device 40 is mounted on the inwardly protruding portion 28 of the mirror housing 16 on the protruding tip surface. As shown in FIGS. 4 and 5, the vibration damping device 40 includes a plurality of (two in the present embodiment) mass housings 44 having a box structure having independent mass accommodation spaces 42. Independent mass member 4 in accommodation space 42
6 is accommodated and arranged. In the following description, the up-down direction refers to the up-down direction in FIGS. 4 and 5 which is, in principle, substantially vertical in the mounted state.

More specifically, the mass housing 44 includes a mass housing body 48 and lids 50 and 50. The mass housing main body 48 has a thick rectangular block shape as a whole, and has a plurality of (two in this embodiment) hollow holes 52 extending linearly and having a constant circular cross-section in the longitudinal direction and extending therethrough. Have been. Note that these hollow holes 52, 52 are formed in parallel with each other,
They are arranged side by side on a plane that extends vertically. Further, a flat mounting piece 5 extending outward is provided on both ends in the width direction of the mass housing body 48, that is, both ends in the vertical direction in FIG.
4 and 54 are integrally formed so as to extend over the entire length along one edge in the thickness direction (the left-right direction in FIG. 5), and these mounting pieces 54 and 54 and the mass housing body 48 are formed. And the one end face in the thickness direction of the second member forms a mounting surface 56 which spreads out in a flat rectangular shape as a whole. Then, as shown in FIG. 2, the mass housing 44 is configured to be superimposed on the protruding distal end surface of the inward protruding portion 28 of the mirror housing 16 on the mounting surface 56. Bolt holes 5 formed in
The mass housing 44 is fixedly attached to the mirror housing 16 by fixing bolts 60 inserted through the mirror housing 16.

The lid body 50 has a rectangular flat plate shape corresponding to the longitudinal end face of the mass housing body 48 as a whole, and one surface thereof has
A number of fitting projections 62 each having a circular projection shape corresponding to the number of the hollow holes 52 formed in 8 are integrally formed in a number corresponding to the number of the hollow holes 52. The fitting projections 62 are press-fitted into the respective hollow holes 52 of the mass housing main body 48, so that the lid 5 is attached to both ends in the longitudinal direction of the mass housing main body 48.
0,50 are fixed. In addition, these lids 50, 5
0 is attached to the mass housing body 48,
Openings at both ends of each hollow hole 52 of the mass housing main body 48 are covered by fitting projections 62, 62 of the lids 50, 50, so that a mass accommodation space extending straight and having a predetermined length in a circular cross section. 42 are substantially insulated from the external space, and a plurality (42 in the present embodiment)
Pieces) are formed.

The material of the mass housing body 48 in the present embodiment is a rigid material having a Shore D hardness of 80 or less or a compression modulus of 5 × 10 ⁴ MPa or more, for example, a metal such as steel or aluminum alloy. A material is suitably employed. Further, the material of the lid 50 is not particularly limited, and any of the same rigid material as the mass housing body 48, a synthetic resin material, a rubber elastic body, and the like can be adopted. Furthermore, the lid 50 can be fixed to the mass housing body 48 by an appropriate fixing structure such as welding, adhesion, locking, screwing, or the like.

The independent mass members 46 are accommodated and arranged in the mass accommodation spaces 42 of the mass housing 44 having such a structure. The independent mass member 46 has a structure in which rubber caps 66 made of a rubber elastic body are attached to both axial ends of a metal mass 64 having a rod shape as a whole.

More specifically, the metal mass 64 has a solid rod shape that extends straight in the axial direction with a circular cross section, and has annular step surfaces 68 near both ends in the axial direction. These step surfaces 6 are formed.
The end portions in the axial direction relative to 8, 68 are small diameter portions 70, 70 each having a smaller diameter than the central portion in the axial direction. In the present embodiment, the mass housing body 48 and the metal mass 64 as described above can be advantageously formed by, for example, extrusion or drawing, and in order to ensure high dimensional accuracy, for example, cold forging or the like is used. Is preferably used.

On the other hand, the rubber cap 66 has a cylindrical shape with a bottom as a whole, and its outer diameter is substantially the same as the outer diameter of the metal mass 64, and its inner diameter is small. The outer diameter of the portion 70 is slightly smaller. The rubber caps 66, 66 are externally fitted and fixed to the small-diameter portions 70, 70 of the metal mass 64, and the inner surface of the rubber cap 66 is adhered to substantially the entire surface of the small-diameter portion 70 in close contact with each other. Thereby, the independent mass member 46 is formed. In this fixed state, the end face on the opening side of the rubber cap 66 is brought into close contact with the step surface 68 of the metal mass 64, and the outer peripheral surface of the large-diameter portion at the center of the metal mass 64. The outer peripheral surfaces of the rubber cap 66 and the rubber cap 66 are substantially flush.

On the outer peripheral surface of each rubber cap 66, a plurality of annular ridges 72 formed in a semicircular cross-section so as to extend over the entire circumference are spaced apart in the axial direction and parallel to each other. In the embodiment, two are formed). Further, the outer diameter of each annular ridge 72 is set larger than the outer diameter of the metal mass 64 and smaller than the inner diameter of the mass housing space 42 of the mass housing 44 by a predetermined amount. The projecting tips of these annular ridges 72 are made to abut against the inner peripheral surface of the mass housing space 42 in the mass housing 44. Is prevented from directly contacting the mass housing 44. The material of the rubber cap 66 is such that the contact surface with the mass housing 44 is in accordance with ASTM standard D2.
Various known rubber materials having a Shore D hardness of 240 or less, preferably 80 or less, more preferably 20 to 40, are suitably employed.

The independent mass member 46 having such a structure is connected to each mass accommodating space 42 of the mass housing 44.
In this case, a gap is provided between the independent mass member 46 and the peripheral wall surface of the mass accommodation space 42 over the entire periphery of the independent mass member 46 in this accommodation state. The independent mass member 46 can be independently displaced relative to the peripheral wall surface of the mass accommodation space 42. Here, in a state where the independent mass member 46 is positioned at the center of the mass accommodation space 42, in particular,
Between the peripheral wall surface of the mass storage space 42 and the surface of each annular ridge 72 abutting on the peripheral wall surface and between the wall surface of the mass storage space 42 and both axial end surfaces of the independent mass member 46 abutting on the wall surface. , A slight gap is formed.

FIGS. 4 and 5 show a state in which the independent mass member 46 is stationary, and the mass storage space 42
Is preferably 0.2 to 1.6 mm, more preferably 0.2 to 1.0 mm, between the upper wall surface and the surface of each annular ridge 72 abutting the wall surface.
The gap dimension δ ′ between the wall surface of the mass storage space 42 and both end surfaces in the axial direction of the independent mass member 46 abutting on the wall surface is preferably 0.1 to 0.8 mm, more preferably 0.1 to 0.8 mm.
0.5 mm. That is, in the present embodiment, the outer diameter dimension of the annular ridge 72 as the contact portion of the independent mass member 46 is Da, and the inner diameter dimension of the mass accommodation space 42 is Db.
Difference: the value of (Db-Da) is preferably 0.1 to 0.1.
8 mm, more preferably 0.1 to 0.5 mm.
Thus, in this embodiment, the mass storage space 42
Within the range in which the independent mass member 46 does not abut the mass accommodating space 42, that is, between the abutting surfaces of the mass accommodating space 42 with the peripheral wall surface, the diameter is preferably 0.2 to 1.6 mm, more preferably. Is set to a reciprocating movable distance of 0.2 to 1.0 mm.

As shown in FIG. 2, the vibration isolator 40 having the structure described above has the mass housing main body 48 and the mounting surfaces 56 of the mounting pieces 54, 54 with the mounting boss portions of the mirror housing 16. The bolt insertion hole 5 of the mounting pieces 54, 54
The mirror housing 16 is attached to the mirror housing 16 by fixing bolts 60 that are inserted through the mirror housings 8 and 58.

In the vehicle mirror device 10 having such a structure, when the structural members 34 and 36 of the vehicle body are vibrated by being applied, the exciting force is applied to the stay 1.
8, transmitted to the mirror housing 16 and the mirror 14,
The mirror housing 16 and the mirror 14 are vibrated. In this case, when the mirror housing 16 is vibrated, the mass housing 44 fixed thereto is also vibrated substantially integrally, and as a result, the independent mass member 46 becomes independent of the mass The mass housing 4 of the independent mass member 46 is caused to jump and displace in the accommodation space 42 and hit against the mass housing 44.
An effective vibration damping effect is exerted on the mirror housing 16 based on the repeated contact with the mirror housing 4.

Therefore, the mirror device 10 for a vehicle has a cantilever structure in which the mirror housing 16 and the mirror 14 are supported by the stay 18 so that
In particular, a large vibration tends to be easily generated in the mirror housing 16 portion, but the vibration isolator 40 fixed to the mirror housing 16 can exert an effective vibration isolating effect on the mirror housing 16. ,
By reducing the vibration of the mirror 14, the rear view by the mirror 14 can be advantageously secured.

In particular, in the present embodiment, the independent mass member 46 having a longitudinally extending rod shape and having an annular contact surface with the mass housing 44 by the annular ridge 72 is employed. The inner shape of the mass storage space 42 in the mass housing 44 is cylindrical, so that the independent mass member 46 can be directly and elastically mounted on the mass housing 44 under substantially the same conditions in all directions perpendicular to the axis. Can be brought into contact with each other, which allows
An effective vibration damping effect can be obtained for vibrations input from any direction perpendicular to the axis.

In this embodiment, the independent mass member 46 is used.
An annular ridge 72 is provided on the outer peripheral surface of both ends in the axial direction. In the direction perpendicular to the axis, the independent mass member 46
Since the rubber cap 66 can be directly and elastically contacted, the contact characteristics of the independent mass member 46 with the mass housing 44, for example, the independent mass The resonance frequency of the jump of the member 46 with respect to the mass housing 44 can be tuned with a large degree of freedom in a wide frequency range down to a low frequency range.
Adjusting the anti-vibration characteristics according to required characteristics such as anti-vibration characteristics and rigidity of the mirror device 10, for example, to make the independent mass member 46 easily jump and displace with respect to the mass housing 44 with smaller vibration energy. This makes it possible to obtain the intended vibration damping effect more advantageously.

In addition, in the present embodiment, the independent mass member 46 is directly and elastically brought into contact with the mass housing 44 by the annular ridge 72 having a soft spring characteristic. Mass housing 4
The occurrence of a tapping sound due to the contact with the fourth member 4 can also be reduced.

Further, in this embodiment, the independent mass member 4
6 has a longitudinal rod shape, the longitudinal space 2 formed by the mirror housing 16 and the mirror 14 is formed.
4 can be used efficiently, and the mass of the mass can be advantageously secured.

In this embodiment, the independent mass member 46 is used.
Is constituted by the metal mass 64, the mass mass can be advantageously secured even if the mass volume is small, and the plurality of independent mass members 46, 46
By adopting, while securing the overall mass mass,
The mass mass of each individual (single unit) can be set small, whereby the independent mass member 46 can be easily jumped and displaced with respect to the mass housing 44 with a smaller vibration energy, and the vibration damping effect can be further improved. It is possible to achieve a further improvement.

FIG. 6 shows a mirror device 80 for a motorcycle according to a second embodiment of the present invention. The mirror device 80 includes a mirror housing 84 on which a mirror 82 is mounted and a stay 86 as a support member.
As shown in FIG. 6, a motorcycle operator can use a mirror 82 to map the rear of the vehicle (see FIG.
The center-right view can be secured.

More specifically, the mirror housing 84
Mirror housing (16) in the first embodiment
Similarly to the above, it is formed of a rigid material such as metal, has a bowl shape as a whole, and has a support projection 90 integrally formed on the inner peripheral surface of the opening side end. The mirror 82 has a disk shape corresponding to the opening of the mirror housing 84, is fitted into the opening of the mirror housing 84, and is supported by the support projection 90 and the annular fixed frame 92. The housing 84 is fixed so as to close the opening. Thereby, the mirror housing 8
Between the mirror 4 and the mirror 82, a space 94 substantially partitioned from the outside is formed. Further, similarly to the mirror device (10) in the first embodiment, the mirror housing 84 has
A block-shaped mounting boss 96 projects inward and outward, and is integrally formed. An inner spherical fitting recess 98 formed on an outer projection 97 of the mounting boss 96 is provided with a projecting distal end of a stay 86. External spherical ball 10 formed integrally with the ball
The ball joint mechanism for adjusting the support angle of the mirror 82 is constituted by the slidably fitted “0”. On the other hand, an anti-vibration device 104 is fixed to the inwardly protruding portion 102 of the mounting boss portion 96 of the mirror housing 84 with respect to the protruding front end surface.

As shown in FIGS. 7 and 8, the vibration isolator 104 has a box structure having a plurality of independent mass accommodation spaces 106, and is independent of each mass accommodation space 106. The structure is such that the mass member 110 is accommodated and arranged. In the following description, the up-down direction refers to the up-down direction in FIGS. 7 and 8 which is, in principle, substantially vertical in the mounted state.

More specifically, the mass housing 108
It is composed of a mass housing body 112 and a lid 114. The mass housing body 112 has a rectangular block shape as a whole. In the mass housing body 112, a plurality of (four in the present embodiment) accommodation holes 116 that are opened on one surface are formed independently of each other. Each of the receiving holes 116 is formed so as to open on one surface and extend in a plate thickness direction with a constant circular cross section, and the depth dimension thereof is substantially the same as the inner diameter dimension of the receiving hole 116. ing. That is, in the present embodiment, the inner surfaces of the four receiving holes 116 have the same dimensions and the same shape, and each has a cylindrical shape having the same inner diameter and depth. The respective central axes are parallel to each other. Further, a pair of mounting pieces 118, 118 protruding outward from the left and right side edges in FIG.
The mass housing body 112 is bolted and mounted to the mirror housing 84 in a bolt insertion hole 120 penetrated through each mounting piece 118 so as to be integrally formed in a substantially flat plate shape.

The lid 114 has a rectangular flat plate shape corresponding to the shape of the end face of the receiving hole 116 on the opening side of the mass housing body 112 as a whole. The lid 114 is overlaid on the mass housing main body 112 and fixed with bolts or the like, so that the openings of the respective accommodation holes 116 of the mass housing main body 112 are covered. (In this embodiment, 4
) Mass accommodation spaces 106 are formed.

The material of the mass housing main body 112 and the lid 114 in this embodiment is the same as that of the mass housing main body (48) in the first embodiment, and has a rigidity of 5 × 10 ⁴ MPa or more. A material is suitably employed.

The independent mass member 110 has a structure in which a covering rubber layer 124 made of a rubber elastic body having a substantially constant thickness is applied to the entire surface of a metal mass 123 having a solid spherical shape. ing. The material of the covering rubber layer 124 is AS AS on the contact surface with the mass housing 108.
Shore D hardness of TM standard D2240 is preferably 80
Hereinafter, those having 20 to 40 are more desirable.

The independent mass members 110 having such a structure are accommodated in the mass housing spaces 106 of the mass housing 108 one by one. In such a state, the independent mass member 110 and the peripheral wall of the
A predetermined gap is formed around the entire circumference of the mass storage space 106 so that the independent mass member 110 can be relatively displaced with respect to the peripheral wall surface of the mass accommodation space 106. Here, in the stationary state of the independent mass member 110 as shown in FIGS. 7 and 8, the left and right and front and rear wall surfaces facing the horizontal in the horizontal direction of the mass storage space 106 are brought into contact with the respective wall surfaces. The clearance dimension with respect to the surface of the independent mass member 110: δ ′ is preferably 0.1 to 0.8 mm, more preferably 0.1 to 0.5 mm, respectively, and the vertical direction of the mass accommodation space 106. Is preferably 0.2 to 1.6 mm, more preferably 0.2 to 1.0 mm, between the upper wall surface facing the above and the surface of the independent mass member 110 which is brought into contact with the upper wall surface. ing. That is, in a state where the independent mass member 110 is positioned at the center in the mass storage space 106, the gap between the opposing surfaces of the outer peripheral surface of the independent mass member 110 and the inner surfaces on both sides in the axial direction (depth direction) of the mass storage space 106. And between the opposing surfaces of the outer peripheral surface of the independent mass member 110 and the inner peripheral surface of the cylindrical peripheral wall of the mass accommodating space 106,
The above: A gap of δ 'is formed.

As shown in FIG. 6, the mirror device 80 having the above-described structure has the mass housing body 112 and the mounting surfaces 126 of the mounting pieces 118, 118.
Are superimposed on the inward protruding portion 102 of the mounting boss 96 of the mirror housing 84 and are bolted to the mirror housing 84 so that the mass housing body 112 is fixed to the mirror housing 84.

Therefore, in the mirror device 80 of this embodiment having such a structure, similarly to the vehicle mirror device (10) of the first embodiment, the vibration of the handlebar 88 of the motorcycle is applied to the mirror device 80. When shaken, the mass housing 108 is vibrated substantially integrally, so that the independent mass member 110 is jumped and displaced in the mass housing space 106 independently of the mass housing 108, and You will be hit by hitting.

Therefore, also in the mirror device 80 of the present embodiment, the vehicle mirror device (1) of the first embodiment is used.
0) are effectively exerted, and based on the repeated contact of the independent mass member 110 with the mass housing 108, the mirror housing 84
The mirror 82, which has been a problem in the cantilevered mirror device 80, can exhibit an effective vibration damping effect.
Thus, an effective anti-vibration effect is exerted against the vibration, and the rear view by the mirror 82 can be advantageously secured.

In particular, in this embodiment, the independent mass member 110 having a spherical outer peripheral surface is employed, and the mass housing space 106 of the mass housing 108 is formed in a cylindrical shape. In all directions orthogonal to each other, the independent mass member 110 can be directly and elastically brought into contact with the mass housing 108 under substantially the same conditions, so that the input is performed from each direction. In each case, an effective vibration damping effect can be exhibited.

In the present embodiment, the independent mass member 110 having a spherical outer peripheral surface is employed, so that the mass housing 1 at the time of the jump displacement of the independent mass member 110 is used.
Since the sliding contact area of the independent mass member 08 is reduced when the vibration is input,
10 can be more efficiently jumped and displaced, so that the independent mass member 110 can more effectively exhibit the vibration damping effect based on the abutment against the mass housing 108.

In the present embodiment, since the independent mass member 110 having a spherical outer peripheral surface is employed, the direction of the independent mass member 110 in the mass housing 108 is eliminated, and the mass of the independent mass member 110 is reduced. The contact state with the housing 108 can be stabilized, and as a result, the vibration damping effect exerted based on the contact of the independent mass member 110 with the mass housing 108 can be more stably exhibited.

Further, in the present embodiment, by adopting the independent mass member 110 having a spherical outer peripheral surface,
A change in the abutting state of the independent mass member 110 with respect to the mass housing 108 due to a change in the inclined state of the mass housing 108 about an axis parallel to the central axis of each mass accommodating space 106 can be avoided. It is not necessary to consider the direction in which the mass housing 108 is attached to the mirror housing 84, and the mass housing 10
There is an advantage that the workability of mounting the mirror housing 8 on the mirror housing 84 can be improved, and a stable anti-vibration effect can be exhibited even when the mirror housing 84 is tilted by the ball joint mechanism.

In the present embodiment, since the covering rubber layer 124 is formed on the outer peripheral surface of the independent mass member 110, the covering rubber layer 124 is formed on the inner surface of the mass accommodating space 106. Mass housing 108
The rotation of the independent mass member 110 in the inside causes the load input point on the coating rubber layer 124 to change substantially equal to the whole, so that the coating rubber layer 124 and, consequently, the vibration isolator 10
4 can be improved in durability.

The embodiments of the present invention have been described in detail above, but these are merely examples, and the present invention
By the specific description in such an embodiment,
It is not to be construed as limiting.

For example, in the above-described embodiment, the mass housings 44, 44 against which the independent mass members 46, 110 abut.
Although the mirror housing 108 is formed separately from the mirror housings 16 and 84, the mass housings 44 and 108 may be formed integrally with the mirror housings 16 and 84.

Further, instead of interposing an elastic material layer between the contact surfaces of the independent mass members 46, 110 and the mass housings 44, 108, the entire independent mass member is made of a rubber elastic material having a predetermined elasticity or a synthetic material. It is also possible to form with a resin material or the like.

Further, a plurality of independent mass members can be accommodated in one mass accommodation space. that time,
A plurality of independent mass members having the same size may be accommodated, or a plurality of independent mass members having different sizes may be accommodated. The plurality of independent mass members may be in series or parallel in the vibration input direction.

Further, in the above embodiment, the plurality of independent mass members 46 and 110 and the mass housings 44 and 1 are provided.
08 have the same shape and dimensions, but a plurality of independent mass members and mass housings having different shapes and dimensions may be formed in one vibration isolator. In other words, it is also possible to adopt a structure in which independent mass members corresponding to the sizes of the respective mass accommodation spaces are accommodated and arranged in mass housings having mass accommodation spaces of different sizes, whereby different vibration frequencies can be obtained. It is possible to respond more advantageously.

The shape of the inner surface of the space for accommodating the mass and the shape of the outer surface of the independent mass member are not limited to those of the first and second embodiments. It is set appropriately, and for example, it is also possible to adopt a polygonal or spherical mass storage space, a flat plate-shaped independent mass member, or the like.

It is also possible to form a thin rubber film on the inner surface of the mass housing. In this case, a rigid material not covered with the rubber film can be directly used as the independent mass member. .

Further, in the present invention, the reciprocating movable distance between the independent mass member and the mass housing is effective to obtain an effective vibration damping effect, and to reduce the contact sound, the distance of the independent mass member to the mass housing is reduced. The contact direction is preferably set to 0.2 to 1.6 mm, but the reciprocating movable distance between the independent mass member and the mass housing in a direction other than the vibration input direction in which vibration is to be prevented is not particularly problematic. . In particular,
For example, in the anti-vibration device 40 according to the first embodiment, if the characteristic purpose of the anti-vibration in the axial direction of the independent mass member 46 is not a characteristic purpose, the both sides of the independent mass member 46 in the axial direction are in contact with the inner surface of the mass housing 44. The gap formed therebetween can be set sufficiently large.

In the present invention, it is not necessary to form the spaces 24 and 94 between the mirror housing and the mirror, and the mirror housing may be formed in close contact with the mirror.

Further, in the present invention, the vibration isolator is
It can be mounted on the outer peripheral surface of the mirror housing or on the mirror.

Further, the present invention relates to a structure in which a mirror housing is supported on a vehicle body by a support member having two or more arms, such as a door mirror of a truck, or a hollow mirror, such as a door mirror for a passenger car. The present invention can be applied to any vehicle mirror device having various structures such as a structure in which a mirror housing is supported on a vehicle body by a support member such as a base.

In addition, although not enumerated one by one, the present invention
Based on the knowledge of those skilled in the art, various changes, modifications, improvements, and the like can be made, and unless such embodiments depart from the spirit of the present invention.
Both are included in the scope of the present invention,
Needless to say.

[0077]

As is clear from the above description, in the vehicle mirror device having the structure according to the present invention, when vibration is input, the mirror housing and the mass housing provided in the mirror housing are moved. Based on the fact that the independent mass members disposed in the accommodation space of the mass housing are directly and elastically brought into contact with each other, a vibration damping effect is exerted. As a result, the vibration of the mirror can be suppressed over a wide frequency range, and the field of view can be advantageously secured.

In the vibration isolator having the structure according to the present invention, when vibration is input to the mass housing,
Based on the fact that the independent mass member is directly and elastically brought into contact with the mass housing, an effective vibration damping effect can be exerted on a predetermined vibration member to which the mass housing is fixed. , Hence such a vibration isolator,
By attaching to a mirror or a mirror housing in the vehicle mirror device, it becomes possible to suppress the vibration of the mirror over a wide frequency range based on the vibration suppression effect as described above,
As a result, the visibility can be advantageously secured.

[Brief description of the drawings]

FIG. 1 is a view schematically showing an attached state of a vehicle mirror device as a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the vehicle mirror device shown in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

4 is a cross-sectional view of the vibration isolator employed in the vehicle mirror device shown in FIG. 1, and is a diagram corresponding to a cross section taken along line IV-IV of FIG.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a view showing a mounted state of a vehicle mirror device according to a second embodiment of the present invention.

7 is a cross-sectional view of the vibration isolator employed in the vehicle mirror device shown in FIG. 6, and is a cross-sectional view taken along the line VII-VII of FIG.
It is a figure corresponding to a cross section.

8 is a sectional view taken along line VIII-VIII in FIG.

[Explanation of symbols]

 Reference Signs List 10 vehicle mirror device 12 cabin 14 mirror 16 mirror housing 18 stay 42 mass storage space 44 mass housing 46 independent mass member

Claims (9)

[Claims] 1. A vehicle mirror device in which a mirror housing to which a mirror is attached is projected from a vehicle body and supported by a support member fixedly attached to the vehicle body. An accommodation space is formed by a rigid mass housing provided directly or indirectly via the mirror housing, and an independent mass member is accommodated and arranged in the accommodation space, and the independent mass member is placed inside the accommodation space of the mass housing. The independent mass member is directly and elastically abutted against the mass housing in a vibration input direction in at least one vibration input direction at the time of vibration input. A mirror device for a vehicle, wherein the mirror device is adapted to be urged. 2. The system according to claim 1, wherein the independent mass member is directly and elastically brought into contact with the mass housing in at least a vertical direction and a vehicle longitudinal direction.
4. The vehicle mirror device according to claim 1. 3. The vehicle mirror device according to claim 1, wherein a contact surface of at least one of the independent mass member and the mass housing has a Shore D hardness of 80 or less. 4. The vehicle mirror device according to claim 1, wherein said independent mass member has a spherical outer peripheral surface shape. 5. The vehicle mirror device according to claim 1, wherein the independent mass member has a shape of a longitudinal rod, and the independent mass member is disposed so as to extend substantially horizontally and in a lateral direction of the vehicle. 6. The mass of the single independent mass member is 10
The vehicle mirror device according to any one of claims 1 to 5, wherein the weight of the vehicle mirror device is from 1000 to 1000 g. 7. The reciprocating movable distance between the abutting surfaces of the mass housings in the independent mass member is 0.2 to 1.6 mm in a vibration input direction of the independent mass member.
7. The vehicle mirror device according to any one of claims 1 to 6. 8. The vehicle mirror device according to claim 1, wherein a total mass of the independent mass member is 5 to 10% of a mass of a mirror housing portion including the mirror. 9. A vibration isolator to be mounted on a vehicle mirror device in which a mirror housing to which a mirror is attached is supported by a support member protruding from a vehicle body, wherein the device is directly attached to the mirror. Or a rigid mass housing which is indirectly fixed via the mirror housing to form an accommodation space, and an independent mass member is accommodated and arranged in the accommodation space, and the independent mass member is placed on the inner surface of the accommodation space of the mass housing. The independent mass member is directly and elastically abutted against the mass housing at the time of vibration input in at least one vibration input direction in which vibration is to be prevented by disposing the independent mass member oppositely and non-adhesively so as to be relatively displaceable. An anti-vibration device characterized in that it can be used.