JPH09142169A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure shielding performance even to temperature change by fitting a divided reflecting member to a shading part in the specified position of a light guide member, almost with no clearance in a normal state. SOLUTION: A light guide member 17 is provided with a light receiving part on one side and formed of an upper luminescent screen 17b and side walls 17c, 17d, and aluminium foil 18 is stuck to one side wall. This aluminium foil 18 is composed of six parts, and the first aluminium foil 18a to the sixth aluminium foil 18f are stuck almost with no clearance from the light receiving side. The aluminium foil 18 formed in the same shape as the side wall 17c on mold release paper and divided being cut in specified shape is stuck to the light guide member 17, and the mold release paper is peeled to stick closely to each other. Light does not therefore leak to a sliding plate 19 and a transmission part for a pointer while preventing separation and the like caused by the thermal expansion difference between the aluminium foil 18 and resin forming the light guide member 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device having a light guide member for transmitting light emitted from a light emitter to a remote site or illuminating a predetermined area.

[0002]

2. Description of the Related Art As such an illuminating device, it is used for indicators such as household air conditioners and stereo amplifiers, various lights such as meters, automobile air conditioners, audio and automatic transmission display devices. Japanese Utility Model Publication No. 54-174168, or Japanese Patent Laid-Open No. 6-4820.
As in the display device of the automatic transmission for automobiles described in Japanese Patent Publication No. 7, a light emitting body such as a light bulb is arranged at a portion deviated from the illuminated portion so that the light of the light emitting body is diffused over a large area or a remote portion. The effect of increasing the lighting effect by reducing the number of lamps, or thinning the light emitting part is achieved by guiding the light to.

[0003]

However, in such a light guide member, the light from the light receiving portion is emitted from other than the fluorescent portion. Therefore, for example, it is necessary to attach an appropriate shielding member so as to prevent the light from leaking to a place other than the light emitting portion such as the shift gate where the illumination effect is impaired when the light is emitted. However, if the shielding member is formed of resin or the like, the size of the light guide member is limited, the lighting effect is reduced and the cost is increased, and the operation of parts such as the pointer of the slide plate is hindered, or the shift knob member The operating range is expanded and the size of the entire component is increased, and if the metal foil is attached, the size of the light guide member and the effect on other parts are extremely reduced. There is a problem that the metal foil is lifted or peeled off due to a dimensional change due to heat such as ambient temperature and cannot be used for a long period of time.

[0004]

In order to solve the above problems, the present invention provides a slide plate which slides integrally with a shift lever having a pointer for indicating a predetermined position of a position plate, a light receiving section and a light guiding section. It is characterized in that it has a light guide member to a position plate composed of a fluorescent portion, and a reflecting member divided into light-shielding portions at predetermined positions of the light guide member is normally attached with almost no space.

[0005]

[Function] A plurality of shielding members are normally attached to the shielding surface with almost no space between them, and the size of each small shielding member changes with respect to external disturbances such as changes in environmental temperature so that the space between the adjacent shielding members is small. Increase or decrease the separation dimension at the boundary. Therefore, only a slit-shaped gap having a minute width is formed, so that a predetermined shielding performance can be ensured against temperature changes and the like.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows an operation unit 1 of an automatic transmission of a vehicle, which includes a shift lever 2, an indicator unit 3, a cover body 5 for covering the indicator unit 3, and the like. 2 is an exploded perspective view of the indicator portion 3, and FIG. 1 is a partial sectional perspective view of the same. The indicator portion 3 has a housing 1 having two openings 12 and 14 provided in parallel on the upper surface portion 11a.
1 and a position plate 15 which is inserted and held in a claw portion 11b formed below the upper surface portion 11a at the periphery of the opening 12.
And a hole 16a into which the lamp V is inserted and fixed is housed in a holder 16 having a side wall.
The light guide member 17 for illuminating at night and the aluminum foil 18 which is a shield member attached to one side surface thereof, the opening 19a through which the shaft portion of the shift lever 2 is inserted, and the pointer 19b indicating the shift position are integrally formed. And a slide plate 19. The light guide member 17 is provided with a light receiving portion 17a on one side, is composed of a fluorescent surface 17b which is an upper surface and side walls 17c and 17d, and is made of a transparent hard resin such as acrylic resin (PMMA, PMMA,
It is formed by injection molding from AS resin or the like. Mounting through holes 17e and 17f are formed on the light receiving portion side and the tip end side. An aluminum foil 18 is attached to one side wall 17c. This aluminum foil 18 consists of six parts, and the first aluminum foil 18a to the sixth aluminum foil 18f are arranged from the light receiving side.
As shown in FIG.

For example, an aluminum foil 1 formed on a release paper in the same shape as the side wall 17c and cut and divided into a predetermined shape.
8 can be adhered to the light guide member 17, and then the release paper can be peeled off to adhere them closely to each other as shown in FIG. The mounting bosses 11c and 11d provided upright on the lower side of the housing 11 are inserted into the mounting through holes 17e and 17f and fixed by heat staking or the like. The fluorescent screen 17b of the light guide member 17 is formed in advance so as to follow the curved line around the periphery of the opening 12.
Position plate 1 bent and attached according to
It is attached to the housing 11 so as to substantially coincide with the lower surface of 5. The mounting state is shown in FIG. 2, and the YY cross section of FIG.
The XX cross section is shown in FIG.

The indicator portion 3 is inserted through the shift lever 2 and fixed by a speed nut S or the like attached to the transmission T. As shown in FIG. 5, the lamp V is attached to the holder 16 so as to be adjacent to the light receiving portion 17a,
The emitted light is guided in the direction of arrow A and illuminates the position plate 15 from the fluorescent surface 17b. The position plate 15 is provided with a transparent portion 24 for a pointer, a transparent portion 25 for characters, and an opaque portion 23 other than the transparent portion for printing, and the transparent portion 25 for characters is a semitransparent green (for example, N character). ,
It is colored red (for example, R letter).

The aluminum foil 18 is attached to the side wall 17c facing the pointer 19b, which will be described below, to prevent light from leaking to the slide plate 19 and the pointer transmitting portion. Since it is divided into a plurality of aluminum foils 18a to 18f, it is possible to prevent peeling due to the difference in thermal expansion characteristics between the resin forming the light guide member 17 and the aluminum foil. That is,
For example, an AS with a linear expansion coefficient of 6 × 10 (-5 power) cm / cm / ° C.
Comparing resin and aluminum with a coefficient of linear expansion of 2 × 10 (-5 power) cm / cm / ° C, the passenger compartment temperature is from 25 ° C to 8 ° C.
When a continuous piece of aluminum foil is attached to the side wall 17c when the temperature rises to 5 ° C., the dimension of the light guide member 17 increases by 0.54 mm when the total length of the aluminum foil of the light guide member 17 is 150 mm. On the other hand, the aluminum foil increases only 0.18 mm, the tensile stress is generated in the aluminum foil due to the contraction difference of 0.36 mm, and the aluminum foil adhered to the side wall 17c faithfully follows the light guide member and is plastically deformed. Cause Then, when the state is returned to room temperature from this state, the aluminum foil is loosened by the stretched portion, floats up, and light leaks.

However, the aluminum foil of this embodiment has a structure in which the aluminum foil is divided into six pieces, and five boundaries are formed between the adjacent aluminum foils. The shrinkage difference of 0.36 mm of the member having a total length of 150 mm is distributed to the five boundaries and the ends of the aluminum foils 18a and 18f due to the temperature rise, and if they are evenly distributed to each, it is about 0.06 mm. Since only the gap is increased, there is almost no plastic deformation elongation of the aluminum foil, and there is no dimensional change due to temperature.

Further, in this embodiment, the character translucent portions 25 are formed at six places, and the boundary is located so as to be located at the midpoint between the character translucent portion 25 and another adjacent character translucent portion 25. Since the boundary is formed, the boundary can be provided at the farthest part from the pointer see-through part 24, and even when a minute amount of light leakage is caused, its influence can be minimized.

[0012]

According to the present invention, a slide plate that slides integrally with a shift lever having a pointer for indicating a predetermined position of a position plate, and a guide plate for a position plate that includes a light receiving portion, a light guiding portion, and a fluorescent portion. Since the reflecting member, which has an optical member and is divided into light-shielding portions at predetermined positions of the light-guiding member, is normally attached without a gap, even if the light-guiding member has a dimensional change due to temperature change, etc. It is possible to prevent elongation and peeling of the member. Therefore, since it can be used in combination with a resin material having a different thermal dimensional change characteristic and a metal foil, the light shielding is good, and the increase in the size of the shielding member can be suppressed to the minimum, so that the device can be used. Effects such as downsizing and proper layout can be obtained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the indicator portion of FIG.

FIG. 3 is an external perspective view of an embodiment of the present invention.

FIG. 4 is a front sectional view taken along line YY of FIG.

5 is a sectional view taken along line XX of FIG.

6 is a left side view of the light guide member (17) of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic transmission 2 Shift lever 3 Indicator part 11 Housing 11a Housing upper surface part 12,14 Housing opening 15 Position plate 17 Light guide member 17a Light receiving part 17b Fluorescent surface 17c, 17d Side wall 18 Aluminum foil 18a-18f Divided aluminum Foil 19 Slide plate 19b Pointer

Claims (1)

[Claims] 1. A slide plate which slides integrally with a shift lever having a pointer for indicating a predetermined position of the position plate, and a light guide member for the position plate which comprises a light receiving portion, a light guiding portion and a fluorescent portion. The lighting device is characterized in that the reflecting member divided into light-shielding portions at predetermined positions of the light guide member is normally attached with almost no space.