JPS6325442B2 - - Google Patents

Description

Detailed Description of the Invention (Technical Field) The present invention includes a reflecting mirror and a front lens made of synthetic resin, a standard socket integrally provided in a part of the reflecting mirror, and a replaceable halogen light bulb inserted into the socket. This relates to a square vehicle headlamp equipped with a.

(Prior Art) Recently, in the United States, an automobile headlamp has been approved, which is composed of a resin reflector and a front lens, and has a replaceable halogen bulb inside. The replacement light bulb assembly and the socket on the lamp side used in this type of headlamp are standardized so that they are compatible with different lamps. below,
This replacement light bulb assembly and the socket portion of the reflector are referred to as a standard replacement light bulb and standard socket.

The structure of this type of headlamp is shown in FIGS. 1 and 2. In the figure, 1 is a front lens made of resin, 2 is a reflecting mirror made of resin, and a standard socket 3 is integrally provided at the rear of this reflecting mirror 2. Reference numeral 4 denotes a standard replacement light bulb of the C-6 type, that is, having a running filament 4A and a passing filament 4B arranged horizontally and at right angles to the optical axis of the reflecting mirror 2, and is attached to the standard socket 3. ing. In that case, the axis of the standard replacement light bulb 4 becomes parallel to the axis of the lamp reflector. 5 is an O-ring interposed between the standard socket 3 and the standard replacement light bulb 4, and 6 is a stopper ring.

The headlight with the above structure is inefficient as a fixture, especially when it is rectangular, and the output luminous flux is reduced.
There is a problem that bright and good light distribution characteristics cannot be obtained.

The luminous intensity distribution of the filament is lowest in the axial direction and highest in the direction perpendicular to the axis, and has a donut-shaped characteristic, but both C-6 type filaments 4A and 4B adopted by this standard replacement bulb 4 are This is because the filament axis is placed in the longitudinal direction of the lamp so that it is orthogonal to the lamp reflector axis, so the luminous flux of the filament cannot be used effectively.

(Objective of the Invention) An object of the present invention is to provide a rectangular vehicle headlamp that can increase the output luminous flux and provide a good light distribution pattern even when a standard replacement light bulb is used.

(Summary of the invention) The present invention consists of a resin reflecting mirror and a front lens, and a standard socket is integrally provided in a part of the reflecting mirror, and a C-6/C-6 type filament is installed in this socket. In a rectangular vehicle headlamp equipped with a standard replacement light bulb, the reflector has an upper reflector and a lower reflector that are paraboloids of revolution whose rotation axes are substantially parallel, and the filament for passing the standard replacement light bulb. The upper reflecting mirror is formed by being shifted backward so that the distance between the respective focal points is larger than the length, and the axis of the passing filament of the standard replacement light bulb is parallel to the rotation axis of the both reflecting mirrors, and The present invention is characterized in that a standard socket for the standard replacement light bulb is provided at a position below the vehicle headlamp located between the focal points.

(Embodiment) Figures 3 to 5 show an embodiment of the present invention, in which 11 is a front lens made of resin, 12 is a reflecting mirror made of resin, and the front shape thereof is square. There is. This reflecting mirror is formed by two upper and lower paraboloids of revolution 12A and 12B with parallel rotation axes, and a standard socket 1 is mounted on the lower wall surface of the lower reflecting mirror 12B.
There are 3. In this embodiment, the socket 13 has a standard replacement light bulb 14 having a running filament 14A and a passing filament 14B, with its axis perpendicular to the rotation axis of the reflecting mirror 12. Further, the upper and lower reflecting mirrors 12A, 1
2B is located front and rear at an interval larger than the length of the passing filament 14B. For example, in this embodiment, the focal point Fu of the upper reflecting mirror 12A is located after the focal point Fd of the lower reflecting mirror 12B, and the distance between both focal points Fu and Fd is The socket position is determined so that the passing filament 14B is located parallel to the rotation axis. For example, the rear end of filament 14B and the focal point
The distance Fu is set to be 0 to 2 mm, and the distance between the front end of the filament 14B and the focal point Fd is set to be 0 to 2 mm. The traveling filament 14A is positioned slightly forward of the passing filament 14B in the illustrated mounted state.

In the figure, 15 is an O-ring and 16 is a stopper ring. In addition, the upper and lower reflecting mirrors 12A, 12
The focal length of B is arbitrarily selected according to the desired reflection pattern. Therefore, the focal lengths may be different.

With the above structure, the basic beam pattern of the traveling beam is a so-called spot, which is a circular area (hatched area) formed in the center by the reflected light from the lower reflector 12B, as shown in FIG. 6A. The basic beam pattern due to the passing beams is formed in the upper part as shown in FIG. 6B. , the portions formed by the reflected lights from the lower reflecting mirrors 12A and 12B overlap to form a semicircular shape.

In that case, the filaments 14A and 14B of the standard replacement bulb 14, which are originally C-6/C-6 type, are replaced with so-called C-8/C-8 type filaments parallel to the rotation axes of both reflectors 12A and 12B. As a result, the light flux incident on the reflecting mirror 12 increases, and the output light flux increases. Moreover, a good reflection pattern can be obtained.

7 to 9 show other embodiments of the present invention, in which the light bulb 14 is mounted so that the light bulb axis is orthogonal to the reflector axis, and the vertical central axis of the lamp is This is a case where the bulb is installed at an angle such that the angle of the bulb axis is θ. That is, a standard socket 13' is integrally provided on the lower wall surface of the reflecting mirror 12 so that its central axis is inclined by an angle θ.

When the bulb axis is tilted in this manner, the switching width between the running beam and the passing beam increases as shown in FIGS. 10A and 10B. This switching width is 1 bulb
Since it changes depending on the inclination angle θ of 4, it can be selected as appropriate. In this example, a good reflection pattern was obtained in the range of θ=0 to 40°.

Note that, as in the previous embodiment, the spot light is formed by the reflected light from the lower reflecting mirror 12B.

In each of the above embodiments, the spot light is reflected by the lower reflecting mirror 12B.
It was formed by the reflected light from the upper reflector 1.
It is also possible to form using the reflected light from 2A, examples of which are shown in FIGS. 11A to 18B.

Figures 11 to 14 A and B are standard replacement light bulbs 14
is installed in the socket 13 so that its axis is perpendicular to the reflector axis, and the passing filament 14B is slightly forward of the traveling filament 14A, with the passing filament 14B being the upper part, the lower reflecting mirror 12A, 12B focus Fu, Fd
This position is similar to the embodiments shown in FIGS. 3 to 6A and B, except that the socket 13'' is formed so as to restrict the light bulb to the above-mentioned state.

However, in this case, as shown in FIG. 14A, the spot light of the basic beam pattern by the traveling beam (the circular pear patterned part in the center) is formed by the reflected light from the upper reflector 12A, A semicircular arc-shaped diagonal area is formed by the reflected light from the lower reflecting mirror 12B.

Figures 15 to 18 A and B show the above embodiment (first
This is the case where the light bulbs 14 shown in Figs. 1 to 14 A and B) are installed with an angle θ tilted, and Figs. 7 to 10
It is tilted in the opposite direction to the embodiments shown in Figures A and B. That is, the standard socket 13 is integrally provided on the lower wall surface of the reflecting mirror 12 so that its center angle is inclined toward the passing filament 14B by an angle θ.

In this case as well, as shown in FIGS. 18A and 18B, the switching width between the running beam and the passing beam becomes large. However, the spot light is formed by the reflected light from the upper reflecting mirror 12A.

(Effect of the invention) As described above, according to the present invention, originally C-6/
By inserting a standard replacement bulb with a C-6 type filament from the bottom of the lamp, the filament is rotated approximately 90 degrees and the C-8/C- type is parallel to the reflector axis.
By arranging the mirrors in an 8-shape shape so that the parts with the most output luminous flux face each other, the luminous flux that enters the reflecting mirror increases, and even though it is square, the luminous flux can be used effectively.
High output luminous flux. In addition, the focal position of the reflector is made different between the upper and lower surfaces, and the standard replacement light bulb is installed so that the passing filament is located between them, making it possible to obtain a good reflection pattern suitable for the desired light distribution pattern. I'm struggling. What's more, you can use existing standard replacement bulbs as they are.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional example of a square vehicle headlamp that is composed of a resin reflector and a front lens and has a standard replacement light bulb inside; Fig. 2 is a vertical sectional view of the same; The figure is a front view showing one embodiment of a vehicle headlamp according to the present invention, FIG. 4 is a longitudinal sectional view of the same, and FIG. 5 is an explanatory diagram of the positional relationship between the upper and lower reflectors and the filament in the same embodiment. , FIGS. 6A and 6B are basic beam patterns, FIGS. 7, 11, and 15 are front views showing other embodiments of the present invention, and FIG.
12 and 16 are longitudinal sectional views of other embodiments, and FIGS. 9, 13, and 17 are explanations of the positional relationships between the upper and lower reflecting mirrors and the filament in each of the other embodiments. Figures 10A and 10B, 14A and 14B, and 18A and 18B are basic beam patterns of other embodiments. 11...Front lens, 12...Reflector, 12A
...Upper reflector, 12B...Lower reflector, 13,
13', 13'' and 13...Standard socket, 14
...Standard replacement light bulb, 14A...Filament for running, 14B...Filament for passing, Fu...
...Focus of the upper reflector, Fd...Focus of the lower reflector.

Claims (1)

[Claims] 1 Consists of a resin reflector and front lens, and a standard socket is integrally provided in a part of the reflector,
In this rectangular vehicle headlamp in which a standard replacement bulb having a C-6/C-6 type filament is attached to the socket, the reflector is an upper reflector of a paraboloid of revolution whose axis of rotation is approximately parallel. The upper reflector is shifted backward so that the lower reflector has a distance between the respective focal points that is larger than the length of the passing filament of the standard replacement light bulb, and the axis of the passing filament of the standard replacement light bulb is formed. A vehicle headlight, characterized in that a standard socket for the standard replacement light bulb is provided at a position below the vehicle headlight, which is parallel to the rotation axis of both the reflecting mirrors and is arranged between the two focal points. light.