JPH03217349A - Illuminating part for vanity mirror - Google Patents

Abstract

PURPOSE:To promote compactification by constituting a light guide plate with an illuminant-opposed part, made of thermoplastic resin high in heat resistance, opposed to a lamp bulb and the remaining light emitting part, in a device which reflects light entered in the light guide plate from the bulb with a rear inner surface and emits it frontward. CONSTITUTION:An illuminating part 12 of a vanity mirror 1 fittingly installed in a recess formed in a sun visor 2 of an automobile is installed at both sides of the mirror set up so as to close a window of a body 3 shaped in almost oblong plate form, from behind and it is provided with a transparent light guide plate 28. In this case, the light guide plate 28 consists of a light emitting part 29, whose upper end is an almost thick wedge form, consisting of thermoplastic resin high in transparency and excellent in formability, and an illuminant opposed part 30, being curved concavely so as to be displaced in proportion as the top face is going to the front side and this curved surface 35 is set down to a light receiving part, and consisting of the said thermoplastic resin excellent in heat resistance. With this constitution, a lamp bulb 39 is set up in an upper end of the recess of the body 3 at this illuminant opposed part 30.

Description

DETAILED DESCRIPTION OF THE INVENTION The illumination section of the vanity mirror of the present invention will be described in detail according to the following items.

A. Industrial application field B. Summary of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving problemsF. Example [Figures 1 to 7] a. Vanity mirror a-1. Summary a-2. Body a-3. Mirror a-4. Front cover b. Vanity mirror lighting section G. Effects of the Invention (A. Field of Industrial Application) The present invention relates to a novel lighting section of a vanity mirror. Specifically, the present invention aims to provide a novel lighting section of a panity mirror that provides desired illuminance, looks good, and has excellent heat resistance.

(B. Summary of the Invention) The lighting section of the vanity mirror of the present invention is provided with a light guide plate that directs light incident from the light bulbs disposed opposite to each other on the side end surface to the front. The light emitting part is made of a thermoplastic synthetic resin with high transparency and good moldability, and the light source facing part is made of a thermoplastic synthetic resin with high heat resistance. By doing so, it is possible to provide a lighting section of a vanity mirror that provides desired illuminance and good appearance and has excellent heat resistance.

(C. Prior Art) There is a demand for a thinner external shape for vanity mirrors for vehicles.

Therefore, a transparent light guide in the shape of a plate is used for the lighting section of the vanity mirror, a light bulb is placed opposite the side end surface of the light guide, and the light from the light bulb is guided from the opposite side end surface. There is one in which the light is introduced into a light body and the light is emitted forward.

By doing so, it is possible to obtain an illumination section with a small depth in relation to the light emitting area, which can contribute to making the vanity mirror thinner.

(D. Problems to be Solved by the Invention) By the way, acrylic resin and polycarbonate resin are conceivable as materials for the above-mentioned light guide, and conventionally, one of these resins has often been used.

Although acrylic resin has the advantages of high transparency and good moldability, it has poor heat resistance and cannot be used in high temperature ranges, making it impossible to use high output light bulbs. When using a high-output light bulb, there are problems such as the need to provide a large distance between the light guide and the light bulb or to take appropriate heat dissipation means.

On the other hand, since polycarbonate resin has a high heat resistance temperature, the above-mentioned problems with acrylic resin are eliminated. However, polycarbonate resin has a lower light transmittance than acrylic resin, so it cannot provide the required illuminance, and also has a bluish color due to the ultraviolet absorber used to improve weather resistance. Furthermore, there are problems such as poor moldability and unevenness due to light and darkness, so-called flow marks, which occur along the flow of resin during injection.

(E. Means for Solving the Problems) In order to solve the above-mentioned problems, the illumination section of the vanity mirror of the present invention includes a light guide plate that directs the light incident from the light bulbs disposed facing each other on the side end surface to the front. In the lighting section of a vanity mirror, the light guide plate is formed from a light source facing section facing the light bulb and the rest of the light emitting section, and the light emitting section is made of a thermoplastic synthetic resin with high transparency and good moldability. The parts are made of thermoplastic synthetic resin with high heat resistance.

Therefore, regarding the lighting section of the vanity mirror of the present invention, the light source facing section, which faces the light bulb and is exposed to high heat, is made of thermoplastic synthetic resin with high heat resistance, so it cannot be placed close to the light bulb. This is advantageous in terms of space, and since most of the light-emitting part, excluding the part facing the light source, is made of thermoplastic synthetic resin with high transparency and good moldability, it is easy to obtain the desired illuminance. and a good appearance without flow marks etc. can be obtained.

(F. Embodiment) [FIGS. 1 to 7] Details of the illumination section of the vanity mirror of the present invention will be described below according to the illustrated embodiment.

1 (a. Vanity Mirror) (a-1. Overview) 1 is a vanity mirror, and the vanity mirror is fitted into a recess formed in a sun visor 2 provided in the interior of an automobile.

(a-2.Body) 3 is a body, which is made of a suitable synthetic resin.

The body 3 has a substantially oblong rectangular plate shape, and a large oblong rectangular window 4 is formed in the portion excluding the left and right sides of the body 3, and a large window 4 in the shape of an oblong rectangle is formed on the rear surface between the opening edge of the window 4. Frame-shaped protrusions 5 are formed at slightly spaced portions, and a portion of the rear surface of the body 3 between the opening edge of the window 4 and the protrusions 5 serves as a receiving edge 6.

Recesses 7, 7 that are open to the front are formed in the body 3 on both sides of the window 4. The recesses 7, 7 have a wedge shape with a wider upper end when viewed from the side. Further, at the upper end portions of these recesses 7, 7, open cutouts 8, 8 are formed on the top surface, both side surfaces, and the rear surface. 9, 9
, . . . are engagement holes formed at positions along the lower edges of the recesses 7, 7.

Furthermore, the left and right edges of the front openings of the recesses 7, 7 are shallowly cut to form seating edges 7a, 7a.

(a-3. Mirror) A rectangular mirror 10 is positioned so as to close the window 4 of the body 3 from the rear, and its peripheral edge is engaged with the receiving edge 6.

A synthetic resin back cover 11 is attached to the rear surface of the body 3, and the mirror 10 is supported by the body 3 and the back cover 11.

Reference numerals 12, 12, . . . are elastic contact pieces formed integrally with the back cover 11, and the tips of the elastic contact pieces 12, 12, . As a result, the peripheral edge of the mirror 10 is pressed against the receiving edge 6.

Portions 11 protruding from the upper end of the back cover 11 to both sides
a and lla are located so as to close the inner side and rear surfaces of the notches 8, 8 of the recesses 7, 7.

(a-4. Front cover) 13 is a front cover, which includes a cover part 14 that substantially covers the front surface of the body 3 and a mounting part 16 connected to the lower edge of the cover part 14 via a flexible hinge part 15. It is formed in the body.

The mounting portion 16 is fixed to the rear surface of the lower end of the body 3.

Reference numerals 17 and 17 designate adsorption pieces made of magnetic material fixed to positions near the upper end of both left and right sides of the inner surface of the cover part 14.

Reference numerals 18 and 18 are adsorption parts provided near the upper end of both the left and right sides of the body 3, which sandwich the permanent magnets 19 and 19 attached to the rear surface of the body 3 from both sides. It consists of yoke plates 20, 20, .

Then, the cover part 14 is folded upward by the flexible hinge part 15, and the suction pieces 17, 1 are folded upward with the front surface of the body 3 closed.
7 is attracted to the yoke plates 20, 20, .

(b. Illumination Parts of Vanity Mirror) Reference numerals 21 and 21 indicate illumination parts provided on both sides of the mirror 10.

22 is a decorative panel made of synthetic resin.

Reference numeral 23 denotes a front frame of the decorative panel 22, and its outer shape is such that it fits snugly into the front part of the recess 7 of the body 3. A vertically long rectangular opening 24 is formed in the front frame 23, leaving the peripheral edge thereof intact.

Support walls 25 , 25 are protruded from the rear surface of the front frame 23 at positions slightly apart from the side edges of the opening 24 .
, 25 is provided with an engagement hole 2 5 in the portion in contact with the rear surface of the front frame 23.
a, 2 5 a, ... are formed. Note that the support walls 25, 25 are formed so that their rear edges are inclined and form a wedge shape when viewed from the side.

Engagement projections 26, 26 are provided upwardly protruding from positions near both ends of the upper rear surface of the front frame 23, and engagement claw pieces 27, 27 are provided rearwardly at positions slightly closer to the sides than the center of the lower end. The engaging claw pieces 27, 27 have engaging claws 27a, 27a projecting from the lower surfaces of the rear ends thereof.

28 is a transparent light guide plate, and the light emitting part 29 and the light source facing part 3
Consists of 0.

The light emitting part 29 has a substantially wedge shape with a thick upper end, and is formed by injection molding of a thermoplastic synthetic resin having high transparency and good moldability, such as acrylic resin.

A table-shaped protrusion 31 is formed on the front surface of the light emitting part 29 except for the peripheral edge other than the upper end thereof, and thereby,
A stepped surface 32 is formed on the peripheral edge excluding the upper end. The protrusion 31 is shaped to fit perfectly into the opening 24 of the decorative panel 22.

33, 33, . . . are engagement projections protruding from the front end portions of both left and right side surfaces of the light emitting portion 29.

Numerals 34, 34, and 34 are engagement protrusions provided on the upper end surface of the light emitting portion 29, and are formed to become wider toward the rear, and their front end surfaces are located slightly to the rear of the stepped surface 32. are doing.

The light source facing portion 30 is formed by injection molding of a thermoplastic synthetic resin with high heat resistance, such as polycarbonate resin.

The upper surface of the light source facing portion 30 is curved into a concave shape so as to be displaced upward as it goes to the front side, and the curved surface 35 is used as a light receiving surface.

In addition, engagement notches 36, 36, 36 are formed on the lower surface of the light source facing portion 30, and end at the slightly rear side of the front surface and reach the rear surface. It is formed in a shape complementary to the protrusions 34, 34, 34.

Therefore, the engagement notches 36, 36, 36 of the light source facing part 30
The engaging protrusions 34, 34, 3 of the light emitting part 29 are inserted from behind.
4, these engagement notches 36, 36, 36
and the engaging protrusions 34, 34, 34 are tightly engaged with each other, and the light emitting portion 29 and the light source facing portion 30 are integrated. In this state, the front surface of the light source facing part 30 is located in the same plane as the stepped surface 32 of the light emitting part 29. In this way, the light guide plate 28 is formed. Note that a large number of minute dots 37, 37, . . . are formed on the rear surface of the light emitting portion 29.

Therefore, the light guide plate 28 is inserted between the support walls 25 of the decorative panel 22 from the rear side.

Then, the engagement protrusions 33, 33, . . . of the light guide plate 28 engage the engagement holes 25a, 25a, .
...and the protrusion 31 of the light guide plate 28 engages with the decorative panel 22.
It fits into the opening 24 of. In this way, the decorative panel 2
2 and the light guide plate 28 are combined.

Reference numeral 38 is white reflective paper, the main part 38a is in contact with the rear surface of the light guide plate 28, and the left and right side pieces 38b, 38b are in contact with the support walls 25, 2.
It is glued to the outer surface of 5.

A set of such a decorative panel 22 and light guide plate 28 is also prepared.

Numerals 39 and 39 are light bulbs arranged at the upper ends of the recesses 7 and 7 of the body 3, and 40 is a connector section provided on the rear surface of the body 3, and an external connection is connected to the connector section 40 via a connector (not shown). connected to the power supply.

A switch 41 is provided on the rear surface of the body 3, and is inserted into the wiring between the connector section 40 and the light bulbs 39, 39. The operator 41a of the switch 41 protrudes from the front surface of the body 3. When the cover portion 14 of the front cover 13 comes to a position where the front surface of the body 3 is closed, the operator 41a is pushed backward by the cover portion 14, thereby connecting the light bulbs 39, 39 and the connector portion 40. When the space between the connector part 40 and the light bulbs 39 is cut off and the cover part 14 of the front cover 13 is moved from the front surface of the body 3, the operator 41a returns to the position protruding from the front surface of the body 3 and connects the connector part 40 and the light bulbs. 39, 39 are electrically connected, and the light bulbs 39, 39 are lit.

And the engagement protrusions 26, 26 of the decorative panels 22, 22,
... through the upper end portions of the notches 8, 8 and engage with the rear sides of the upper end opening edges of the recesses 7, 7, and from that state, the decorative panel 22
, 22 to the rear, the engaging claw pieces 27, 2
7,... are inserted into the engagement holes 9, 9,... of the body 3, and the engagement claws 27a, 27a,... are inserted into the engagement holes 9,...
9, . It faces the light bulbs 39, 39.

Therefore, when the light bulbs 39, 39 are lit, the light is transmitted to the light receiving surface 3.
5, 35 into the light guide plate 28, and the stipples 37, 3 on the rear surface.
It is reflected by 7, . . . and emitted forward. Furthermore, even if some light escapes to the rear of the light guide plates 28, 28, such light is reflected by the main portions 38a, 38a of the reflective sheets 38, 38 and returned into the light guide plates 28, 28.

In this way, light is emitted from the front surfaces of the light guide plates 28, 28.

The light receiving surfaces 35, 35 are close to the light bulbs 39, 39 and are exposed to the high lighting heat of the light bulbs 39, 39, but the light source facing parts 30, 30 including the light receiving surfaces 35, 35 are made of heat-resistant Because it is made of high thermoplastic synthetic resin. It is hardly affected by heat. Also, direct light bulbs 39, 39
The light emitting part 29, which is not exposed to the lighting heat, is made of thermoplastic synthetic resin with high transparency and good moldability, so it is easy to obtain the required illuminance with little light loss and has a good appearance. becomes.

(G. Effects of the Invention) As is clear from the above description, the illumination part of the vanity mirror of the present invention is arranged on the side of the mirror, and is attached to the light guide plate made of a transparent material and the side end surface of the light guide plate. An illumination section of a vanity mirror comprising a light bulb arranged oppositely to supply light into the light guide plate, the light entering the light guide plate from the light bulb being reflected on the rear inner surface of the light guide plate and emitted to the front. , the above-mentioned light guide plate consists of a light source facing part facing the light bulb and the rest of the light emitting part, the light emitting part is made of a thermoplastic synthetic resin with high transparency and good moldability, and the light source facing part is made of a highly heat resistant heat resistant resin. It is characterized by being made of plastic synthetic resin.

Therefore, in the lighting section of the vanity mirror of the present invention, the light source facing section, which faces the light bulb and is exposed to high heat, is made of thermoplastic synthetic resin with high heat resistance, so it cannot be placed close to the light bulb. This is advantageous in terms of space, and since most of the light emitting part, excluding the part facing the light source, is made of thermoplastic synthetic resin with high transparency and good moldability, it is easy to obtain the desired illuminance. Moreover, a good appearance without flow marks etc. can be obtained.

In the above embodiments, the light guide plate is shown in which the light emitting part and the light source facing part are molded separately and then joined together, but the light emitting part and the light source facing part can be molded using a so-called two-color molding method. They may be formed integrally by a method called.

In addition, various modifications can be made without departing from the spirit of the present invention, and the technical scope of the present invention may be interpreted to be limited by the specific shapes and structures shown in the above examples. It's not something you can do.

[Brief explanation of drawings]

The drawings show an example of implementation of the illumination part of the vanity mirror of the present invention, and FIG. 1 is a perspective view showing an overview of the vanity mirror, FIG. 2 is a front view showing a partially cut away vanity mirror, and FIG. Figure 3 is a rear view of the vanity mirror, Figure 4 is an enlarged sectional view taken along line IV-rV in Figure 2, Figure 5 is an enlarged sectional view taken along line V-V in Figure 2, and Figure 6 shows the main points. FIG. 7 is an exploded perspective view of the light guide plate. Explanation of symbols l... Vanity mirror 10... Mirror 21... Illumination part of vanity mirror, 28... Light guide plate, 29... Light emitting part, 30...
Light source facing part, 3 5 Side end surface (of the light guide plate), 39 - Light bulb applicant Koito Manufacturing Co., Ltd. &Ki-anm Enlarged sectional view (IV-IVl turtle) Fig. 4 Enlarged sectional view (v-v line) Fig. 5 Visit and 21 True 4 #4 Ne IL Fig. 7

Claims (1)

[Scope of Claims] A light guide plate disposed beside the mirror and made of a transparent material, and a light bulb disposed opposite to the side end surface of the light guide plate for supplying light into the light guide plate, the light guide being guided from the light bulb. An illumination part of a vanity mirror that reflects the light that has entered the light plate on the rear inner surface of the light guide plate and emits it forward, the light guide plate consisting of a light source facing part facing the light bulb and the remaining light emitting part, The illumination part of a vanity mirror is characterized in that the light emitting part is made of a thermoplastic synthetic resin with high transparency and good moldability, and the part facing the light source is made of a thermoplastic synthetic resin with high heat resistance.