JP4268159B2 - Mirror holder - Google Patents

Description

  The present invention relates to a mirror holder that is attached to the periphery and the back surface of a mirror and holds the mirror, and more particularly to a mirror holder for incorporating and holding a vehicle mirror such as a door mirror or a fender mirror in a mirror housing.

Conventionally, various forms have been proposed and known as a mirror holder for holding a mirror (see, for example, Patent Document 1).
As shown in the drawing of Patent Document 1, the mirror holder disclosed in Patent Document 1 has a mirror housing portion at the center, and the edge of the housing portion is folded back inward. Are integrally provided, and are configured to be attached over the peripheral edge (end portion) of the mirror and the back surface (back surface) thereof to hold the mirror.
And by holding a hot-melt adhesive or hot-melt adhesive tape between the edge that is attached and held on the periphery of the mirror and the periphery of the mirror, the mirror is held so that no play occurs. is doing.
In the conventional mirror holder configured as described above, the electrode terminal on the peripheral edge surface of the mirror and the mirror holder itself are doubly covered with the hot melt adhesive or the hot melt adhesive tape. It is said that protection, rust prevention and waterproofing effects are improved.
Japanese Utility Model Publication No. 6-16833 (see Examples, FIGS. 1 to 3)

By the way, the mirror holder is generally formed into a shape along the peripheral shape of the mirror using a resin material. And the peripheral dimension of the mirror holder, in other words, the inner dimension of the peripheral frame part (corresponding to the above-mentioned edge part) of the inward opening in which the peripheral edge of the mirror is held is in line with the peripheral dimension of the mirror, and Even if the mirror holder is thermally expanded due to high temperature heat, the mirror holder is designed so that it can be reliably held in a state in which the mirror does not play or fall off.
Moreover, like patent document 1, after accommodating a mirror in the accommodating part of the mirror holder which consists of heat-shrinkable materials, the mirror holder is heat-shrinked by performing heat treatment of heating the mirror holder, The gap with the periphery is eliminated and the mirror is securely held.

  In this way, when a mirror holder having a peripheral frame portion formed in substantially the same dimension as the peripheral shape of the mirror or a peripheral frame portion thermally contracted by heat treatment is thermally contracted at a low temperature. The stress is applied to the mirror, and the mirror undergoes deformation such as strain due to the load stress. If deformation such as this distortion is repeated, it may cause distortion of the image projected on the mirror, and improvement has been demanded.

  Therefore, the present invention was devised to solve such a problem, and when the resin holder body is thermally deformed due to a temperature change, the load stress accompanying the heat deformation is not applied to the mirror. An object of the present invention is to provide a mirror holder provided with a novel mirror holding structure improved so as to hold a mirror.

In order to solve the above-mentioned problem, in claim 1, a resin-made mirror holder that is attached to the periphery and the back surface of the mirror and holds the mirror, the holder body being held on the back surface of the mirror. The bulge is integrally provided with a bulge formed in a direction away from the back surface of the mirror and at least along the peripheral shape of the mirror, and the bulge is thermally deformed by the holder body. In this case, the mirror holder includes a locally deformable portion that can be elastically deformed following the thermal deformation, and the locally deformed portion is formed on a bulging top portion of the bulging portion .
Here, it is preferable that the local deformation portion is formed at the same time as the molding of the holder body and is formed in a thin shape that elastically deforms following the thermal deformation when the holder body is thermally deformed. (Claim 2).

According to the structure of Claim 1, if a holder main body is thermally deformed by a temperature change, the local deformation | transformation part provided in the bulging part will deform | transform following the heat deformation.
That is, the bulging shape of the bulging portion changes due to the deformation of the local deformation portion. Due to this change, the load stress applied to the mirror as the holder body is thermally deformed is absorbed and relaxed.
More specifically, according to the configuration of the first aspect, since the local deformation portion is provided at the bulging top portion, when the holder body is thermally deformed, the bulging shape of the bulging portion is provided at the bulging top portion. Due to the deformation of the locally deformed portion, the bulging width changes.
That is, by changing the bulging shape of the bulging portion so as to expand or contract in the direction of thermal deformation of the holder body, load stress applied to the mirror due to thermal deformation of the holder body is absorbed and relaxed. And by comprising as described in Claim 2, a local deformation | transformation part can be easily and easily provided in the principal part of a bulging part. In addition, since the locally deformed portion is thin, elastic deformation is easily performed.

According to a third aspect of the present invention, in the mirror holder, the local deformation portion is formed at a plurality of important points of the bulging portion including at least the bulging top portion .

According to the configuration of claim 3, wherein, as described in claim 1, the effect of bulging shape changes as such or shrink spread thermal deformation direction of the holder main body of the bulged portion is at least It can be obtained more effectively by deformation of the local deformation portions provided at a plurality of important points including the bulging top . That is, it is easy to change the bulging shape of the bulging part by deforming a plurality of local deformation parts, and it is possible to widen the change margin. Thereby, the effect | action of the said Claim 1 can be obtained much more effectively.

According to a fourth aspect of the present invention, the bulging portion is formed along the periphery of the holder body so as to be integrally connected to the peripheral frame portion of the holder body that holds the periphery of the mirror. It is in the mirror holder.

According to the structure of Claim 4, when the bulging part provided with the local deformation | transformation part was made into the structure formed along the periphery of a holder main body, when a holder main body is thermally deformed, the whole region of a holder main body Thus, it is possible to effectively absorb and relax the load stress applied to the mirror due to thermal deformation. Thereby, the operation according to the first aspect can be obtained reliably and effectively.
Further, by providing a bulging portion along the periphery of the holder body so that the peripheral frame portion is continuously provided, the assembling work for fitting the peripheral edge of the mirror into the peripheral frame portion deforms the bulging portion. This can be done in the That is, the mirror can be easily assembled by deformation of the bulging portion.

  The present invention is configured as described above, and when the resin holder body is thermally deformed due to a temperature change, the mirror body is held by the holder body so that load stress accompanying the heat deformation is not applied to the mirror. be able to. Therefore, it is possible to suppress the occurrence of deformation such as distortion in the mirror.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
FIG. 1 is a perspective view showing an embodiment of a mirror holder according to the present invention, FIG. 2 is a front view of the mirror holder in a state where a mirror is assembled, and FIG. 3 is a cross-sectional view in FIG. FIG. 4 is an enlarged view of a main part of the cross-sectional view.

≪Description of holder body≫
The holder body 2 is integrally formed from a resin material, and as shown in FIG. 3, the bulge described later is formed on the entire periphery of the back surface holding portion 2a attached to the back surface side of the mirror 1. A peripheral frame portion 2b is provided which is integrally provided through the portion 3 and opened inward. The peripheral edge 1a of the mirror 1 is attached to and held by the peripheral frame portion 2b.
In this way, the holder main body 2 on which the mirror 1 is assembled and held is supported by the mirror housing 6 indicated by a two-dot chain line in FIGS. 2 and 3 so as to be tiltable.
In addition, the holder main body 2 here means the mirror holder itself.

≪Explanation of rear holding part≫
As shown in FIG. 1 and FIG. 3, the back surface holding portion 2a has a shape along the peripheral shape of the mirror 1 and is slightly smaller than the peripheral shape dimension so that the back surface of the mirror 1 can be held over almost the entire surface. Is formed.
As shown in FIG. 1, a plurality of projections 5 are projected on the back surface holding portion 2a, and the back surface of the mirror 1 is held by the projections 5 group. This is a countermeasure against thermal deformation in the thickness direction of the back surface holding portion 2a.

  Although not shown in the drawings, in addition to the protrusions 5..., Ribs or the like are appropriately provided on the back surface holding portion 2 a to improve the mechanical strength (characteristics) of the back surface holding portion 2 a, so that the holder body 2 can be reduced in weight. That is, it is possible to achieve both improvement in mechanical strength and weight reduction of the holder body 2.

≪Explanation of bulge part≫
The bulging portion 3 is integrally formed over the entire peripheral edge of the back surface holding portion 2a along the peripheral shape of the mirror 1, and has a cross-section toward the rear away from the back surface of the mirror 1, as shown in FIG. It is formed to bulge out substantially in a J-shape or U-shape. And the local deformation | transformation part 4 is formed in the bulging top part (curved protrusion part) of this bulging part 3. FIG.

≪Description of local deformation part≫
The local deformation portion 4 is deformed by following the heat deformation when the holder body 2 is contracted by heat shrinkage particularly when the back surface holding portion 2a of the holder body 2 is at a low temperature such as in winter. Absorption and relaxation are performed so that load stress (clamping force from the peripheral edge side) generated due to thermal contraction of the back surface holding portion 2 a is not applied to the mirror 1.
That is, the load stress is absorbed and relaxed (suppressed) so that the mirror 1 is not distorted.

This local deformation portion 4 is formed integrally with the bulging portion 3 when the holder main body 2 is molded, and as shown in the enlarged view of FIG. For example, it is formed in the bulging top part of the bulging part 3 by making it into the shape of a concave thin wall.
In addition, when making the thickness of the bulging part 3 thin, as shown in the enlarged view of FIG. 1, it may be performed from one side in the thickness direction of the bulging part 3 or from both sides. is there. Moreover, it is arbitrary to make it thin-walled like a groove or streak, or to be thin-walled in a certain section (range).

  The load stress is applied to the mirror 1 due to the temperature change because of the difference in material between the glass forming the mirror 1 and the resin forming the holder main body 2 (back surface holding portion 2a). ) Is different.

According to the mirror holder of the present embodiment configured as described above, when the holder main body 2 undergoes heat shrinkage at low temperatures when the outside air temperature is low, such as in winter, the heat shrink deformation indicated by the arrow X in FIG. The local deformation part 4 provided at the bulging top of the bulging part 3 so as to be pulled in the direction is deformed as a starting point of deformation accompanying the thermal contraction. As a result of this deformation, the bulging shape of the bulging portion 3 changes so as to expand in the bulging width direction (L1 → L2), whereby the load stress applied to the mirror 1 due to the thermal contraction of the holder body 2 is absorbed and relaxed. Will be.
Therefore, it is possible to suppress the occurrence of deformation such as distortion in the mirror 1 and to prevent the possibility of damage to the mirror 1.

  Further, even when the holder body 2 is thermally expanded in summer, the expansion of the back surface holding portion 2a where thermal expansion is most remarkable is the bulging portion 3 having a substantially U shape or J shape, and the bulging top portion. It will be interrupted by the local deformation part 4. That is, even if the back surface holding portion 2a undergoes thermal expansion, the expansion action associated with the thermal deformation is absorbed and blocked by the bulging portion 3 and the local deformation portion 4 at the bulging top portion. It is not propagated (transmitted) to the peripheral frame portion 2b that holds the peripheral edge 1a. Thereby, the peripheral edge 1a can be stably held so that the mirror 1 does not play.

  Further, since the bulging portion 3 having the local deformation portion 4 is formed along the periphery of the holder body 2, the periphery 1 a of the mirror 1 is fitted and assembled to the periphery frame 2 b of the holder body 2. At this time, the bulging portion 3 can be deformed. That is, the mirror 1 can be easily assembled to the holder body 2 by deforming the bulging portion 3 so as to be reversed and folded back to the back side of the holder body 2. Therefore, improvement in productivity and reduction in production cost can be expected.

Further, according to the mirror holder of the present embodiment, the plurality of protrusions 5 are provided on the back surface holding portion 2a of the holder body 2 that adheres and holds the back surface of the mirror 1, and the back surface of the mirror 1 is provided by the group of the protrusions 5. By being configured to hold, the problem caused by the difference in thermal expansion coefficient (linear expansion coefficient) between the mirror 1 and the holder main body 2 due to the difference in material is eliminated, and the mirror 1 is not loose. It can be held stably.
That is, instead of placing the mirror 1 on the back surface holding portion 2a in a solid state, the mirror 1 is held by a point contact (point support) structure with a plurality of protrusions 5 spaced from the back surface holding portion 2a. When the back surface holding portion 2a undergoes thermal contraction due to a temperature change, the back surface holding portion 2a can move independently of the mirror 1 in its heat deformation direction. Therefore, the mirror 1 can be stably held on the holder main body 2 in a state where no play occurs.

[Description of Other Embodiments]
FIG. 5 is a cross-sectional enlarged view of a main part showing another embodiment of the mirror holder according to the present invention.
Such an embodiment is basically the same as the above-described embodiment except for the bulging configuration of the bulging portion 3 described above and the local deformation portion 4 described above provided at a plurality of locations. Therefore, the same components are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 5, the bulging part 3 is formed deeper (higher) than the above-described embodiment. And the thin-shaped local deformation | transformation parts 4 and 4 are formed in two places, the bulging top part of the bulging part 3, and its bulging base part (boundary part with the back surface holding | maintenance part 2a).

  According to the mirror holder of the present embodiment configured as described above, when the holder main body 2 undergoes heat shrinkage at low temperatures when the outside air temperature is low, such as in winter, the heat shrink direction indicated by the arrow X in FIG. The local deformation | transformation part 4 provided in two places, the bulging top part of the bulging part 3 and its bulging base part, deform | transforms so that it may be pulled by. As a result of this deformation, the bulging shape of the bulging portion 3 changes so as to expand in the bulging width direction (L1 → L2). Will be.

The specific configuration of the embodiment of the present invention is not limited to the above-described embodiment, and there are design changes and the like without departing from the gist of the present invention described in claims 1 to 5. Are also included in the present invention.
For example, the bulging shape of the bulging portion 3 may be formed by bulging into a substantially V-shape or U-shape other than the aforementioned substantially J-shape or U-shape. Moreover, the local deformation | transformation part 4 is not thin-walled, but is arbitrary, such as making it the shape of a broken line to the extent that the holding rigidity (durability) of the mirror 1 by the peripheral frame part 2b does not fall.
Moreover, the local deformation | transformation part 4 is effective not only in two places of the bulging top part and bulging base part of the bulging part 3, but when the holder main body 2 raise | generates thermal contraction, the load stress accompanying the thermal deformation is effective. It is also optional to provide the bulging portion 3 at a plurality of locations such as 3 or 4 locations where the bulging portion 3 can be elastically deformed so as to absorb and relax.

It is a perspective view before showing the embodiment of the mirror holder concerning the present invention, and assembling a mirror. It is a front view of the mirror holder in a state where a mirror is assembled. It is a cross-sectional view in FIG. It is an enlarged view of the principal part of the cross-sectional view, (a) shows a state before the holder body is thermally contracted, (b) is a deformation of the bulging portion when the holder body is thermally contracted Indicates (change). It is an enlarged view of the principal part which shows other embodiment of the mirror holder which concerns on this invention, (a) shows the state before a holder main body heat-shrinks, (b) is when a holder main body heat-shrinks The deformation | transformation (change) state of the bulging part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mirror 1a Periphery 2 Holder main body 2a Back surface holding part 2b Peripheral frame part 3 Swelling part 4 Local deformation part

Claims (4)

A resin mirror holder that is attached to the periphery and back of the mirror and holds the mirror,
The back holding part of the holder body attached to the back of the mirror is integrally provided with a bulging part formed in a direction away from the back of the mirror and along the peripheral shape of the mirror,
The bulging portion includes a local deformation portion capable of elastic deformation following the thermal deformation when the holder body is thermally deformed ,
The said local deformation | transformation part is formed in the bulging top part of the said bulging part, The mirror holder characterized by the above-mentioned .   The local deformation portion is formed simultaneously with the molding of the holder body, and when the holder body is thermally deformed, the local deformation portion is formed in a thin shape capable of elastic deformation following the thermal deformation. The mirror holder according to claim 1. 3. The mirror holder according to claim 1, wherein the locally deformed portion is formed at a plurality of important points of the bulging portion including at least the bulging top portion . 2. The bulging portion is formed along the periphery of the holder main body so as to be integrally connected to a peripheral frame portion of the holder main body that holds the peripheral edge of the mirror. The mirror holder according to any one of claims 3 to 4 .

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