JPH0714065Y2 - Vehicle room lamp - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a room lamp installed near the ceiling of a driver's cab of an automobile, and particularly, to dispose two lamps on the left and right and to operate each lamp to blink independently. The present invention relates to a room lamp having a structure that can be formed.

[0002]

2. Description of the Related Art Generally, a driver's seat and a passenger's seat are provided in a driver's cab of an automobile, and a room lamp is provided near its ceiling. For example, when an assistant turns on a room lamp in order to view a map in a driver's cab provided with the illumination device having such a configuration, a part of the light enters the driver's eyes and causes dazzling, which is dangerous. In particular, recent room lamps are preferred to have high illuminance, which increases the risk of driver dazzling.

In order to prevent such a danger, the two-lamp type room lamp shown in FIG. 3 is known. In the two-lamp type room lamp according to this known technique, a left lamp housing 1 and a right lamp housing 2 are arranged side by side, and a left light source bulb 3 and a right light source bulb 4 are provided in each lamp housing. Although not shown in the figure, both of the light source bulbs 3 and 4 are provided with a manual operation switch and are wired so that they can be turned on and off independently of each other.

The two-lamp type room lamp is installed in the vicinity of the ceiling while being positioned at the center in the left-right direction of the driver's seat. A chain line M-M shown in the drawing is a center line of the automobile, and a driver's seat is provided on the right side and a passenger seat is provided on the left side.

[0005]

In the conventional two-lamp type room lamp shown in FIG. 3, for example, the right light source bulb 4 is used.
When the left light source bulb 3 is energized and turned on while the power supply is cut off, a light flux is emitted from the light source bulb 3 as indicated by arrows a to e, and mainly the passenger seat is illuminated. However, a part of the luminous flux goes to the driver's seat as indicated by arrow e.
Further, since the reflected light such as the arrows r ₁ and r ₂ also travels to the driver's seat, the driver feels dazzling and is dangerous. Recently, the room lamps for automobiles tend to have high illuminance, and the above-mentioned dangers are further increased.

As shown by phantom lines in FIG. 3, attempts have been made to adjust the light by providing lenses 9a and 9b so as to cover the openings 1a and 1b of the left and right lamp housings, respectively. The effect is not yet sufficient, for example, when the left light source bulb 3 is turned on, the driver in the right driver's seat feels a little dazzling.

The present invention has been made in view of the above circumstances, and provides a two-lamp type room lamp having a simple structure in which the driver's seat does not feel dazzling when the passenger side lamp is turned on. The purpose is to

[0008]

A vehicle room lamp according to the present invention as a structure for achieving the above object is provided with two lamp housings arranged near the ceiling of a driver's cab of an automobile and arranged left and right. And a light source bulb provided in each of the lamp housings, and a switch for blinking each of the light source bulbs, wherein at least one of the two lamp housings is a lamp housing. It is characterized in that the vicinity of the opening of is constructed as follows.

A. Assuming the position of the eyes of a person sitting in a seat adjacent to the seat opposite the one lamp housing, b. Of the edges around the opening of the one lamp housing, the farthest point and the closest point from the eye position are respectively selected, and c. Assuming a straight line connecting the furthest point above and the position of the eye, d. Among the edges around the opening of the one lamp housing, the vicinity of the closest portion is extended toward the driver's seat side and intersects with the straight line. And e. A black paint is applied to the vicinity of the opening on the inner surface of the one lamp housing.

[0010]

According to the above construction, when viewed from the position of the eyes of the person in the next seat, the part of the opening of the lamp housing far from the eyes is hidden behind the part close to the eyes. Therefore, the reflected light from the distant place does not enter the eyes, and no dazzling is felt.

Regarding the portion of the edge of the opening of the lamp housing near the eye, the inside of the opening cannot be seen when viewed from the adjacent seat. Since the light from the light source bulb does not reach the outer peripheral surface of the opening, no problem occurs.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a vehicle room lamp according to the present invention.
It is sectional drawing which shows an Example. The vehicle room lamp of this embodiment is an example improved by applying the present invention to the conventional two-lamp type room lamp shown in FIG. 3, and is a left-side light source having the same drawing reference number as in FIG. Since the bulb 3 and the right-side light source bulb 4 are the same or similar constituent members to those of the conventional example, the description thereof will be omitted. The left and right light source bulbs 3 and 4 are wired so that they can be blinked independently of each other by a manual operation switch (not shown).

Reference numeral 5 is a left side lamp housing constructed by applying the present invention. In the present example, the present invention is applied to the right lamp housing 6 (only the outline is shown by a virtual line),
It is configured symmetrically with the left lamp housing 5 with respect to the center line M-M. When implementing the present invention, the present invention can be applied only to the passenger side lamp. On the inner surface of the left lamp housing 5, a black coating 7 is applied to a place near the opening 5a. In this example, a matte black coating was applied.

E in the figure is the position of the eyes of the driver sitting in the driver's seat. 5b shown is the farthest portion of the edge of the lamp housing opening from the eye position E,
5c is also the closest point. A straight line EE ′ connecting the above-mentioned point 5b and the position E is assumed. The above-mentioned part 5c is configured to extend toward the passenger seat,
It intersects with the straight line EE '. Driver's eye position E
As seen from the above, in the conventional two-lamp type room lamp, the vicinity of the opening of the lamp housing on the passenger side feels as if it is shining and is dazzled, but in this example, black coating is applied near the opening. Since it has been applied, dazzling is significantly reduced. In addition, the vicinity of the position (farthest position) 5b that easily causes dazzling in the opening is hidden behind the edge 5c on the side closer to the eye, and therefore there is no danger of causing dazzling and it is safe.

Further, in this embodiment, an annular louver 8 is provided so as to face the inner peripheral surface of the opening 5a of the lamp housing so as to be spaced therefrom. FIG. 2 is a partially enlarged sectional view for explaining the operation of the louver 8. N is an arbitrary point on the inner surface of the lamp housing 5 near the opening. At this point N,
Most of the direct light of the arrow f incident from the light source bulb is absorbed by the black coating 7 and reflected by only a small portion. Most of the small amount of light reflected from the above is specularly reflected as indicated by arrow g, and is in the driver's seat (right side of the figure).
Do not go in the direction. A further part of the slight reflected light is diffusely reflected as shown by an arrow i, but is blocked by the annular louver 8 and does not go toward the driver's seat.

Further, light incident on the inner peripheral surface of the annular louver 8 as indicated by an arrow j (light reflected in the lamp housing).
Since the incident angle θ is smaller than the incident angle φ of the incident light of the arrow f, it is reflected toward the passenger seat as shown by the arrow k and is effectively used. However, since it is not directed toward the driver's seat, it is dazzled. There is no danger of giving.

[0017]

[Effect of the Invention] Installed near the ceiling of the cab of a car,
The present invention is applied to a vehicle room lamp having two lamp housings arranged on the left and right sides, a light source bulb provided in each of the lamp housings, and a switch for blinking each of the light source bulbs. Apply, a. Assuming the position of the eyes of a person sitting in a seat adjacent to an opposing seat, for at least one lamp housing, b. Of the edges around the opening of the one lamp housing, the farthest point and the closest point from the eye position are respectively selected, and c. Assuming a straight line connecting the furthest point above and the position of the eye, d. Out of the edge around the opening of the one lamp housing, the vicinity of the closest portion is extended toward the driver's seat side to intersect with the straight line, and e. When black coating is applied near the opening on the inner surface of the one lamp housing, there is an excellent practical effect that there is no possibility of dazzling the driver when the lamp on the passenger side is turned on.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a vehicle room lamp according to the present invention.

FIG. 2 is a schematic cross-sectional view showing an enlarged main part of the above embodiment.

FIG. 3 is a sectional view of a conventional vehicle room lamp.

[Explanation of symbols]

1 ... Left side lamp housing, 1a ... Opening, 2 ... Right side lamp housing, 2a ... Opening, 3 ... Left side light source bulb, 4 ...
Right light source bulb, 5 ... Left lamp housing, 5a ... Opening, 5b ... Location farthest from the driver's eye, 5c ...
Location closest to the driver's eye position, 6 ... right lamp housing, 7 ... black coating, 8 ... annular louver, a ... diffused light flux emitted from the left light source bulb, b ... diffused light flux emitted from the left light source bulb, c ... Diffused light flux emitted from the left light source bulb, d ... Diffused light flux emitted from the left light source bulb, e ... Diffused light flux emitted from the left light source bulb, f ... Direct light incident on the point N on the inner circumferential surface of the lamp housing, g ... Specular reflection light at point N, h ... Reflection light incident on point N on the inner peripheral surface of the lamp housing, i ... Diffuse reflection light at point N, j ...
Incident light on the inner peripheral surface of the annular louver, k ... Reflected light on the inner peripheral surface of the annular louver, N ... Any point near the opening on the inner periphery of the lamp housing, θ ... Incident angle on the inner peripheral surface of the annular louver, φ ... Point N
Angle of incidence of direct light incident on

Claims (1)

[Scope of utility model registration request] 1. A vehicle is installed near a ceiling of a driver's cab,
A room lamp for a vehicle comprising two lamp housings arranged on the left and right, a light source bulb provided in each of the lamp housings, and a switch for blinking each of the light source bulbs. A vehicle room lamp characterized in that at least one lamp housing of the individual lamp housings has an opening and its vicinity configured as follows. a. Assuming the position of the eyes of a person sitting in a seat adjacent to the seat opposite the one lamp housing, b. A portion of the edge of the opening of the one lamp housing that is farthest from the eye position,
And the nearest point respectively, and c. Assuming a straight line connecting the furthest point described above and the position of the eye, d.
Among the edges around the opening of the one lamp housing, the vicinity of the closest portion is extended toward the driver's seat side and intersects with the straight line. And e. A black paint is applied to the vicinity of the opening on the inner surface of the one lamp housing.