JPH0734513U - Vehicle lighting - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an optical design that considers only the illumination light of the basic light distribution pattern, yet it is possible to prevent glare light and to form the illumination light that goes upward of the illumination light of the basic light distribution pattern. Provided is a vehicular lamp that can be used. [Structure] The light flux emitted from the bulb 14 is a front lens 1.
Front lens 1 through 3 to illuminate with a basic light distribution pattern
The light flux emitted from the bulb 14 above the illumination light of the basic light distribution pattern is formed by the inclined surfaces 19b and 20b of the prisms 19 and 20 that have horizontal surfaces 19a and 20a that project from the inner wall surface 13a of the reference numeral 3 and extend in a substantially horizontal direction. Be guided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicular lamp including a front lens that transmits a light beam emitted from a bulb, and a prism that is provided on an inner wall surface of the front lens and that forms a ridge line that extends in a substantially horizontal direction. .

[0002]

[Prior art]

 Conventionally, as shown in FIGS. 2 and 3, a front lens 2 that transmits a light beam emitted from a bulb 1 and ridge lines R1 and R2 that project from an inner wall surface 2a of the front lens 2 and extend in a substantially horizontal direction are provided. There is a vehicle lamp 5 having prisms 3 and 4 to be formed.

The prisms 3 and 4 are a part of forming a design line indicated by the vertical and horizontal slanted lines shown in FIG. 3, and as shown in FIG. 2B, from the inner wall surface of the front lens 2. It is provided with a pair of projecting upper and lower horizontal planes 3a, 3b, 4a, 4b and vertical planes 3c, 4c extending between the horizontal planes 3a, 3b, 4a, 4b, and designed to thicken and emphasize the design line. ing.

[0004]

[Problems to be solved by the device]

 By the way, in the vehicular lamp 5 configured as described above, the prisms 3 and 4 have the vertical surfaces 3c and 4c so as to emphasize the design line, so that the prisms 3 and 4 are incident on the prisms 3 and 4. There was a problem that the light flux from the bulb was transmitted as glare light.

Further, the illumination light of the basic light distribution pattern is formed by the optical design based on the combination of each light distribution lens (divided into vertical and horizontal inclined lines in FIG. 3) formed on the front lens 2. However, in addition to the illumination light of this basic light distribution pattern, for example, the illumination light for signs that goes upward of the illumination light of the basic light distribution pattern for confirming the sign is also included in the optical design of this light distribution lens. Depends on.

Therefore, a part of the light flux for forming the illumination light of the basic light distribution pattern is considered so as not to become glare light, and is used for the purpose of identifying the mark that is directed upward of the illumination light of the basic light distribution pattern. It was troublesome to have an optical design in which part of the light distribution lens was tilted upward so that it could be used as illumination light.

The present invention has been made in view of the above circumstances, and has an optical design in which only the illumination light of the basic light distribution pattern is taken into consideration. It is an object of the present invention to provide a vehicular lamp capable of forming illumination light directed to a vehicle.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a vehicle having a front lens that transmits a light beam emitted from a bulb and a prism that projects from an inner wall surface of the front lens and forms a ridge line that extends in a substantially horizontal direction. In the lighting device of the present invention, the prism includes a horizontal surface that projects from the inner wall surface and an inclined surface that extends from the inner wall surface toward the tip of the horizontal surface and guides a light beam emitted from the bulb upward. Use as a summary.

[0009]

[Action]

 In such a configuration, the luminous flux emitted from the bulb forms the illumination light of the basic light distribution pattern, and at the same time, the prism of the prism having the horizontal plane extending in the substantially horizontal direction is projected on the inner wall surface of the front lens. The sloping surface forms the illumination light directed upward of the illumination light of the basic light distribution pattern.

[0010]

【Example】

 Next, an embodiment of the vehicular lamp of the present invention will be described with reference to FIG.

In FIG. 1A, a vehicular lamp 10 is held by a housing 11 having a front opening 11 a and a housing 11 via a hot melt material 12 so as to close the front opening 11 a. The front lens 13, the reflector 15 that reflects a part of the light beam emitted from the bulb 14 toward the front lens 13, the shade 16 that blocks a part of the light beam emitted from the bulb 14, the housing 11, and the bulb. The boot 17 includes a boot 17 that seals the space between the boot 14 and the housing 14, and a fixing ring 18 that fixes the base end of the boot 17 to the housing 11.

When the vehicle lamp 10 is viewed from the front, it is apparently the same as the conventional vehicle tool 5 shown in FIG.

The front lens 13 is formed with a light distribution lens that transmits as illumination light of a basic light distribution pattern by the normal light beams P1 and P2 emitted from the bulb 14 and reflected by the reflector 15, and the lens of this light distribution lens is formed. Vertical and horizontal inclined lines are formed on the front lens 13 by the pattern. In the figure, reference numerals 19 and 20 denote prisms projecting from the inner wall surface 13a of the front lens 13 so as to form a ridge line extending in a substantially horizontal direction at a part of the vertical and horizontal inclined lines.

As shown in FIG. 1B, the prisms 19 and 20 extend horizontally in a straight line from the inner wall surface 13a to the horizontal surfaces 19a and 20a and the horizontal surfaces 19a and 20a protruding from the inner wall surface 13a. It has inclined surfaces 19b and 20b. The horizontal surfaces 19a and 20a form the ridgelines R1 and R2 shown in FIG.

The inclined surfaces 19b and 20b use the parallel luminous fluxes P3 and P4 so as to effectively use the parallel luminous fluxes P3 and P4 that do not form the illumination light of the basic luminous intensity distribution pattern of the parallel luminous fluxes P1 and P2. Guide light to the upper part of the illumination light to form the illumination light that illuminates signs and the like.

As shown in FIG. 1C, instead of the prisms 19 and 20, horizontal planes 21a and 22a protruding from the inner wall surface 13a and curves from the inner wall surface 13a to the horizontal planes 19a and 20a are curved obliquely upward. The prisms 21 and 22 having the inclined surfaces 21b and 21b extending upward may be used.

In the above configuration, the parallel light beams P1 and P2 emitted from the bulb 14 and reflected by the reflector 15 are converted into illumination light of a basic light distribution pattern by the lens pattern of the light distribution lens formed in the lens 13. It is formed.

On the other hand, the parallel light beams P3 and P4 directed to the prisms 19 and 20 formed by the lens pattern of the light distribution lens are not diffused as they are, but the prism action of the inclined surfaces 19b and 20b illuminates the basic light distribution pattern. It is guided to the upper part of the light and is effectively used as illumination light for illuminating signs and the like.

Although the above embodiment discloses that the illumination light of the basic light distribution pattern is formed by the lens 13, a multi-reflector or a complex reflector, which has been used in recent years, is used to perform the basic reflection by the reflector. In a vehicle lamp in which illumination light having a light distribution pattern is formed and a prism having a design ridgeline is formed on a lens, a prism forming the design ridgeline is referred to as a pre-drawing portion 19 and 20 similar to that of the present application. Then, the illumination light directed upward from the illumination light of the basic light distribution pattern may be formed.

[0020]

[Effect of device]

 As explained above, in the vehicular lamp of the present invention, the prism formed on the inner wall surface of the lens is used as the illumination light of the basic light distribution pattern, and the luminous flux emitted from the bulb is above the basic light distribution pattern. By adopting a prism that guides the light to the optical source, it is possible to prevent glare light and to form the illumination light that goes upward of the illumination light of the basic light distribution pattern, even though the optical design considers only the illumination light of the basic light distribution pattern. it can.

[Brief description of drawings]

1A and 1B show a vehicle lamp of the present invention, in which FIG. 1A is a vertical sectional view of the vehicle lamp, FIG. 1B is an enlarged sectional view of an essential part, and FIG. 1C is an enlarged sectional view of an essential part showing a modified example. Is.

FIG. 2 shows a conventional vehicular lamp, (A) is a longitudinal sectional view of the vehicular lamp, and (B) is an enlarged sectional view of a main part.

FIG. 3 is likewise a front view of a vehicle lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Vehicle lamp 13 ... Front lens 13a ... Inner wall surface 14 ... Bulb 19 ... Prism 19a ... Horizontal surface 19b ... Inclined surface 20 ... Prism 20a ... Horizontal surface 20b ... Inclined surface

Claims (1)

[Scope of utility model registration request] 1. A vehicle lamp having a front lens that transmits a light beam emitted from a bulb, and a prism that is provided on an inner wall surface of the front lens and forms a ridge line that extends in a substantially horizontal direction. A horizontal surface protruding from the inner wall surface, and an inclined surface extending from the inner wall surface toward the tip of the horizontal surface and guiding the light flux emitted from the bulb to above the illumination light of the basic light distribution pattern. Characteristic vehicle lighting.