JPS60216401A - Headlight for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 lamp socket part used in this type of headlamp are standardized so that they are compatible with different lamps. Hereinafter, this replacement light bulb assembly and the socket portion of the reflector will be 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. 4 is a standard replacement light bulb having a running filament 4A and a passing filament 4B, and is attached to the standard socket 3. 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 headlamp having the structure described in item 1 has the problem that it is inefficient as a fixture, especially when it is rectangular, and the output luminous flux is small, making it impossible to obtain bright and good light distribution characteristics.

That is, the luminous intensity distribution of the filament is lowest in the axial direction,
It has donut-shaped characteristics that are highest in the directions perpendicular to the axis, but because the filament axis is placed in the longitudinal direction of the lamp so that it is perpendicular to the lamp reflector axis, the luminous flux of the filament cannot be used effectively. This is due to this.

(Object of the Invention) An object of the present invention is to provide a rectangular vehicle headlamp that can increase the output luminous flux even when using standard replacement light bulbs and obtain a good P-turn in light distribution. be.

(Summary of the Invention) The present invention is for a rectangular vehicle, which is composed of a resin reflector and a front lens, a standard socket is integrally provided in a part of the reflector, and a standard replacement light bulb is attached to the socket. In a headlamp, the reflector has two upper and lower paraboloids of revolution, each having its focal point one inch farther back and forth than the length of the passing filament, and having substantially parallel axes of rotation. A standard socket is provided at the bottom of the socket, and a standard replacement light bulb is inserted into this socket from below so that the axis of the passing filament is parallel to the rotation axis of the reflector and located between the focal points of both rotational speed object surfaces. It is characterized by the fact that it has been inserted.

(Example) Figures 3 to 5 show an example of the present invention.
is a front lens made of resin, 12 is a reflective mirror made of resin,
Its front shape is square. This reflecting mirror is formed by two upper and lower paraboloids of revolution 12A and 12B with parallel rotation axes, and a standard socket 13 is provided on the lower wall surface of the lower reflecting mirror 12B.

This socket] 3 is a filament for traveling in this embodiment)
The standard replacement light bulb 14 having the filament 14A and the passing filament 14B is shaped such that its axis is perpendicular to the rotation axis of the reflecting mirror 120. In addition, in the upper and lower portions, the focal point Fu of the upper reflecting mirror 12A is located after the focal point F (l) of the lower reflecting mirror 1.2B, and the socket is installed so that the filament 14B for passing is located between both focal points Fu and Fd. For example, if the distance between the rear end of the filament 14B and the focal point Fu is 0 to 2 + mn, the filament 1
The distance between the front end of 4B and the focal point Fd is set to be 0 to 2 ran. The traveling filament 14A is located a little closer to the front than the passing filament 14B in the illustrated mounting state.

In the figure, 15 is an 0 ring, and 16 is a stopper ring. Note that the focal lengths of the upper and lower reflecting mirrors 12A and 12B are arbitrarily selected according to the required reflection pattern.

Therefore, the focal lengths may be different.

With the above structure, the basic beam turn by the traveling beam is as shown in Fig. 6 (A).
The part (hatched area) formed in a circular shape in the center by the reflected light from 2B, the so-called spot. The basic beam patterns due to the passing beams are formed by the upper and lower reflecting mirrors 12A and 1 as shown in FIG. 6(B).
The portions formed by the reflected light from 2B overlap to form a semicircular shape.

In that case, the filament of the standard replacement bulb 14)], 4A
.

Since 14B is parallel to the reflector axis, the reflector 12
The incident light flux increases, and the output light flux increases.

Moreover, a good reflection ie turn 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 way, Figures 10(A)(B)
), the switching width between the running beam and the passing beam increases. Since this switching width changes depending on the inclination angle θ of the light bulb 14, it can be selected as appropriate.

In this example, good reflection and reflection were 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 embodiments described above, the spot light is formed by the reflected light from the lower reflecting mirror 12B, but it is also possible to form it by the reflected light from the upper reflecting mirror 12A.
As shown in Figures 18(A) and 18(B).

Figures 11 to 14 (A) (B) are standard replacement light bulbs 14
is attached to the socket 13 so that its axis is perpendicular to the reflector axis, and the passing filament 14B is slightly forward of the running filament 14A, where the passing filament 14B is the upper one, and the lower reflector +2A ,
12B is located between the focal points Fu and Fd.
This embodiment is similar to the embodiment shown in FIGS. 6(A) and 6(B), except that a socket 13" is formed to restrict the light bulb to the above state.

However, in this case, as shown in Figure 14), the basic beam by the traveling beam, 1. The /'p-turn spot light (circular bundle pattern area in the center) is reflected by the upper reflector 12A.
The 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 a case where the light bulb 14 shown in Figs. 1 to 14 (A) and (B)) is installed with an angle θ tilted, and Figs. 7 to 10 (A)
) It is tilted in the opposite direction to that of the embodiment (B). 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 toward the passing filament 14B by an angle θ.

In this case as well, as shown in FIGS. 18(A) and 18(B), 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 +2A.

(Effects of the Invention) As described above, according to the present invention, a standard replacement light bulb is inserted from below the lamp and the filament is positioned parallel to the axis of the lamp reflector, so the luminous flux incident on the reflector is increased and the square shape However, the luminous flux can be used effectively, resulting in a high-output luminous flux. In addition, the focal position of the reflector is different between the upper and lower surfaces, and the standard replacement light bulb is installed so that the passing filament is located between them, resulting in good reflection and reflection suitable for the desired 4-turn light distribution. You can get a turn. 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. , Figure 6(A) (
B) is the basic beam pattern, Figures 7, 11 and 1
Figure 5 is a front view showing another embodiment of the present invention, and Figure 8 is a front view showing another embodiment of the present invention.
12 and 16 are longitudinal sectional views of each embodiment,
9, 13, and 17 are explanations of the positional relationships between the upper and lower reflecting mirrors and the filament in each embodiment 9-
1, FIG. 10 (Chrysanthemum (B), FIG. 14 (A) (B), and FIG. 18 (A) (B) are the basic beam no. e-turns of each embodiment. 11...・Front lens, 12...Reflector, 12A...Upper reflector, 12B...Curved lower reflector, 13.13', 1.3" and 13"...
・Standard socket, 14... Standard replacement light bulb, 1.4A... Running filament, 1.4B.
...Filament for passing each other, Fu...
Focus of upper reflector, Fd...Focus of lower reflector. Patent Applicant Stanley Electric Co., Ltd. 10- Fig. 7 Fig. 1O (A) Fig. 10 IN (B) Fig. 8 Fig. 15 Fig. 18 (A) Fig. 18 1 Modification 1. -Child! Figure 16

Claims (1)

[Claims] In a rectangular vehicle headlamp that is composed of a resin reflector and a front lens, a standard socket is integrally provided in a part of the reflector, and a standard replacement light bulb is attached to this socket. Each focal point moves forward and backward at an interval greater than the length of the passing filament, and is formed to have two upper and lower paraboloids of revolution having substantially parallel rotation axes,
A standard socket is provided at the bottom of the socket, and a standard replacement light bulb is inserted into this socket from below so that the axis of the passing filament is parallel to the rotation axis of the reflector and located between the focal points of the paraboloid of cylinder rotation. A vehicle headlight featuring: