JPH04118504U - projector type headlight - Google Patents

Abstract

(57) [Summary] [Purpose] Headlamps that use projector-type lighting have problems that are difficult to install on automobiles due to their long depth, and a structure that allows the entire projector-type lighting to swing during aiming. This results in a problem that becomes more complicated, and the aim is to solve this problem. [Structure] The reflecting mirror 3 and the projection lens 4 of the projector-type lamp 2 are arranged so that their respective optical axes X and Y are substantially orthogonal,
A plane mirror 5 is disposed at approximately the intersection point P of the respective optical axes X and Y so that one optical axis is conjugate with the other optical axis, and the plane mirror 5 has horizontal directions By adopting the projector-type headlight 1 equipped with an aiming mechanism that can freely swing in the vertical direction, the projector-type headlight 1 has a bent shape to shorten the depth dimension, and when aiming, only the plane mirror 5 can be swung. It allows for simplification and solves problems by making it easy to move.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a headlamp for vehicles, and in detail it is called a projector type headlamp. A lamp that combines a bifocal reflective surface such as a spheroidal surface with a projection lens is used. This relates to the structure of the headlight.

0002

[Conventional technology]

The figure shows an example of a headlight 90 using a conventional projector-type lamp 91 of this type. 3, and the optical axis X of the reflecting mirror 91a of the projector-type lamp 91 and the projection lens 9 1b, that is, the reflecting mirror 91a and the projection lens 91b. are arranged and integrated, and when aiming the headlight 90, the project This was done by swinging the entire vector-type lamp 91 vertically and horizontally.

0003

[Problem that the idea aims to solve]

However, in the conventional headlamp 90 described above, firstly, the reflector 91 Since a is of a bifocal type, the front and rear dimensions of the headlight 90 are relatively small. It becomes long, creating problems that make it difficult to install it on a vehicle, and secondly, aiming When performing this, the entire projector-type lamp 91 is required to swing. This puts a heavy burden on the moving mechanism, resulting in considerable strength and precision. A rocking mechanism is required, which reduces productivity and increases costs. Problems have arisen, and solutions to these problems have become a challenge.

0004

[Means to solve the problem]

This invention is a projector as a specific means to solve the conventional problems mentioned above. In a headlight using a projector-type lamp, the reflector and projection lens of the projector-type lamp are are arranged so that their optical axes are substantially perpendicular to each other, and at a position approximately at the intersection of the respective optical axes. A plane mirror is arranged so that one optical axis is conjugate to the other optical axis, and A project characterized in that the plane mirror described above is swingable in the horizontal and vertical directions. By providing a T-shaped headlamp, the above-mentioned conventional problems are solved.

[0005]

【Example】

Next, the present invention will be explained in detail based on an embodiment shown in the drawings. What is indicated by the reference numeral 1 in FIG. 1 is a headlamp according to the present invention, and this headlamp 1 is a For example, it is composed of an ellipsoidal reflecting mirror 3 having a spheroidal or compound ellipsoidal surface and a projection lens 4. It is different from the conventional example in that the projector lamp 2 shown in the figure is adopted. Similarly, according to the present invention, the optical axis X of the reflecting mirror 3 and the optical axis Y of the projection lens 4 are They are arranged to be substantially orthogonal at the intersection P, and at the same time, a plane mirror 5 is arranged at the intersection P. It is assumed that

[0006] Below, the configuration of the present invention will be explained in more detail. so that the optical axis X of the reflecting mirror 3 and the optical axis Y of the projection lens 4 are conjugate, that is, , on the other hand, for example, if the optical axis X is arranged to coincide with the mapping of the other optical axis Y, With this arrangement, the light beam from the reflecting mirror 3 is directed to the plane mirror 4. is incident on the projection lens 4 under exactly the same optical conditions as when there is no Therefore, it does not affect the performance of headlight 1, such as light distribution characteristics, etc. Become something.

[0007] In addition, the plane mirror 5 has, for example, a horizontal direction when the headlamp 1 is installed. For example, an Emi model whose pivot 5a is a ball bearing normally provided in this type of headlamp. The aiming mechanism has the same structure as the aiming mechanism and can swing vertically and horizontally. A mechanism is provided, and by operating this aiming mechanism, the above-mentioned To bias the light from the reflector 3 in the vertical direction and the horizontal direction, that is, to bias the light from the headlight 1. Aiming is possible.

[0008] Next, the operation and effects of the headlamp 1 of the present invention having the configuration described above will be explained. To clarify, first, the optical axis X of the reflecting mirror 3 and the optical axis Y of the projection lens 4 are made conjugate. By providing the plane mirror 5 in such a way that the headlight 1 is bent in the middle, The depth can be made shallow, making it easy to install in a car.

[0009] In addition, aiming can be performed by making the plane mirror 5 swingable in the vertical direction and the horizontal direction. By making the headlamp 1 swingable, the aiming mechanism of the headlight 1 only swings the plane mirror 5. Compared to the conventional projector lamp 2 that swings the whole This makes it possible to significantly reduce the weight of the object and simplify the configuration.

0010 What is shown in FIG. 2 is also another embodiment of the present invention, and the previous embodiment is based on the plane mirror. The position of the pivot 5a provided in the plane mirror 5 was set at an appropriate position such as one corner of the plane mirror 5. On the other hand, in this embodiment, the position of the pivot 5b is made to coincide with the position of the intersection point P. By doing this, the reflector 3 can be used even when aiming. There is no change in the optical path length reaching the projection lens 4 from Even more favorable results can be obtained without causing any deviation in light distribution characteristics.

[0011]

[Effect of the idea]

As explained above, with this invention, the reflector and projection lens of projector-type lighting equipment have been developed. are arranged so that their optical axes are substantially perpendicular to each other, and at a position approximately at the intersection of the respective optical axes. A plane mirror is arranged so that one optical axis is conjugate to the other optical axis, and A projector-type headlight in which the plane mirror can be swung horizontally and vertically. Firstly, conventional models have relatively large dimensions in the depth direction, which results in, for example, This type of projector affected the structure of the car and placed restrictions on installation. By making the depth dimension of the molded light fixture short, it has an excellent effect of giving flexibility in installation. It is something.

0012 Second, conventionally, the entire projector-type light fixture was swung during aiming. Aiming requires an excessive amount of weight, which requires solidity and high precision. The mechanism is simplified by requiring only the plane mirror 4 to be swung, reducing the weight burden. This makes it possible to simplify the configuration and has an excellent cost reduction effect. be.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a projector type headlamp according to the present invention.

FIG. 2 is a sectional view showing the main parts of another embodiment of the present invention.

FIG. 3 is a sectional view showing a conventional example.

[Explanation of symbols]

1... Headlight 2...Projector light fixture 3...Reflector 4...Projection lens 5...Plane mirror 5a, 5b...Pivot P...intersection X... Optical axis of the reflecting mirror Y...Optical axis of projection lens

Claims (2)

[Scope of utility model registration request] 1. In a headlight using a projector-type lamp, a reflecting mirror and a projection lens of the projector-type lamp are arranged so that their respective optical axes are substantially perpendicular to each other, and a position of a substantially intersection point of the respective optical axes is arranged. A plane mirror is arranged so that one optical axis is conjugate to the other optical axis, and the plane mirror is provided with an aiming mechanism that can swing freely in the left-right direction and the up-down direction. Features a projector-type headlight. 2. The projector type headlamp according to claim 1, wherein the aiming mechanism is provided with a pivot substantially coincident with the position of the intersection.