JPH0553008U - Vehicle lamp lens structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the non-luminous portion of the outer lens of the vehicle lamp. [Structure] Central part 1 of outer lens 12 of vehicle lamp
A light condensing portion 12e for condensing a part of the light emitted from the bulb 13 toward the end in the outer lens is formed on the inner surface near the boundary between the 2c and the side portion 12d, and a diffuse reflection surface is formed on the inner surface near the end of the outer lens. 12 f is formed, and the light guided in the terminal direction is diffusely reflected and emitted to the outside to form a light emitting portion by the edge light effect.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a structure of a lens of a vehicle lamp.

[0002]

[Prior Art]

 As a vehicle lighting device, a lighting function for the purpose of seeing the object well, and a signal for the purpose of notifying the traveling state of the own vehicle to the oncoming vehicle, the following vehicle, or other road users. There is a function, and headlamps, fog lamps, etc. belong to the former, and tail lamps, stop lamps, turn signal lamps, etc. belong to the latter. Many of the lamps with signal functions, such as tail lamps, stop lamps, and turn signal lamps, are structurally integrated and are commonly called combination lamps. As shown in FIG. 3, a combination lamp 2 is provided at the rear of the vehicle body 1. It is installed.

Signal lamps for combination lamps are important for safe driving of a follower vehicle because their performance greatly affects their performance, and they are bright and not too dazzling. In order to fulfill its function, it is also necessary to have good visibility even on curved roads and on the way up and down slopes. Although the orientation performance of the signal beacon is designed to satisfy the above-mentioned conditions, the layout of the entire vehicle does not always provide a sufficient optical design condition. Therefore, there are cases where the lens is mainly designed and cases where the reflector is mainly designed. The lens-based one is characterized in that the configuration is simple.

The turn signal lamp 3 of the quarter portion 2a of the combination lamp 2 shown in FIG. 3 includes a lamp housing 4 having a reflector 4a formed on the inner surface thereof as shown in FIG. 4, and an outer lens 5 mounted on the front surface of the lamp housing 4. The outer lens 5 includes a bulb 6 and the like mounted on the lamp housing 4, and the outer lens 5 has a flange 5b erected on the inner surface of the terminal 5a fitted into a groove 4c formed in the terminal 4b of the lamp housing 4 to prevent hot. It is sealed and fixed by the melt 7, and is attached to the vehicle body side together with the lamp housing 4. The light emitted from the front side of the bulb 6 is transmitted through the outer lens 5 as it is to the rear side, and the light emitted from the back side is reflected by the reflector 4a and then transmitted through the outer lens 5 and emitted to the rear side.

[0005]

[Problems to be solved by the device]

 By the way, in the conventional outer lens 5 having the above structure, the area of the central portion 5c emits light brightly to become a light emitting portion, but the side portion 5d is fixed to the lamp housing 4 by the hot melt 7 because the terminal 5a is sealed and fixed. There is a problem that not only the outer lens 5 cannot be used effectively, but also the appearance is unsatisfactory, because it becomes a dull, non-emission area.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a lens structure for a vehicle lamp that uses the edge light effect to emit light near the terminal of the outer lens of the lamp. To aim.

[0007]

[Means for Solving the Problems]

 To achieve the above object, according to the present invention, a part of the light emitted from the bulb is collected on the inner surface of the outer lens of the vehicle lamp in the vicinity of the boundary between the central portion and the side portion of the outer lens so that In addition to forming a light condensing part that leads to the terminal direction, a diffuse reflection surface is formed on the inner surface near the terminal of the outer lens, and the light guided to the terminal direction is diffusely reflected and emitted to the outside. Is.

[0008]

[Action]

 The condensing part of the outer lens condenses a part of the light emitted from the bulb and guides the inside of the outer lens toward the terminal. Then, the light traveling toward the terminal inside the outer lens is diffusely reflected by the irregular reflection surface and is emitted to the outside of the outer lens, and the vicinity of the side terminal of the outer lens is emitted by the edge light effect. As a result, the range of the non-light emitting part on the outer lens side is narrowed, and the appearance is improved.

[0009]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a quarter part of a combination lamp 10, which is composed of a lamp housing 11, an outer lens 12, a bulb 13 and the like, and a parabolic reflector 11a is formed on the inner surface of the lamp housing 11 to form a terminal. A groove 11c is formed in 11b. The groove 11c serves as a lens fixing portion for fixing the end 12a of the outer lens 12.

The outer lens 12 is integrally formed with a flange 12b on the inner surface in the vicinity of the end 12a, and the flange 12b is connected to the groove 11c for the lens fixing portion of the lamp housing 11 via the hot melt 15. It is tightly fitted and fixed. A condensing portion 12e is integrally formed on the inner surface of the outer lens 12 near the boundary between the central portion 12c and the side portion (quarter portion) 12d so as to face the valve 13. The condensing portion 12e has a prism shape, condenses a part of the light emitted from the side portion of the bulb 13 and takes it into the outer lens 12, and the side surface 12d of the outer lens 12 receives the terminal 12 inside. It is designed to lead toward a.

The inner surface of the outer lens 12 in the vicinity of the end 12a is roughened to form a rough surface 12f, which is a diffuse reflection surface (hereinafter, referred to as "random reflection surface 12f"). The irregular reflection surface 12f diffuses the light passing through the side portion 12d of the outer lens 12 and emits it to the outside. The outer lens 12 having such a shape is integrally formed of a transparent resin member. Further, the bulb 13 is arranged at the focal point position of the reflector 11a, and is replaceably attached to the lamp housing 11.

The operation will be described below. The light emitted from the front side of the bulb 13 passes through the central portion 12c of the outer lens 12 and is emitted rearward, and the light emitted from the rear side is reflected by the reflector 11a and passes through the central portion 12c of the outer lens 12. And is irradiated backwards. Further, the light emitted from the side of the bulb 13 is condensed by the condensing portion 12e of the outer lens 12, passes through the side portion 12d of the outer lens 12, and is guided toward the terminal 12a.

Since the inner surface of the outer lens 12 near the terminal 12a is a diffuse reflection surface 12f, the light passing through the inside of the side surface 12d toward the terminal 12a is diffusely reflected by the diffuse reflection surface 12f and emitted to the outside. To be done. As a result, the outer lens 12 emits bright light in the vicinity of the terminal 12a of the side portion 12d due to the edge light effect. In the outer lens 12, the central portion 12c is the light emitting portion that emits the brightest light, and the vicinity 12d 'of the terminal 12a emits a considerably bright light due to the edge light effect. The side portion 12d ″ of the non-light emitting portion is a non-light emitting portion. The range of the non light emitting portion 12d ″ is considerably narrower than that of the conventional one, and as shown in FIG. It becomes a dark striped pattern.

[0014]

[Effect of the device]

 As described above, according to the present invention, the quarter portion of the outer lens of the combination lamp can be used as the light emitting portion by the edge light effect, and the non-light emitting portion on the side can be reduced as compared with the conventional outer lens. This is possible and has the effect of improving the visual appearance.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a combination lamp to which the structure of a vehicle lamp lens according to the present invention is applied.

FIG. 2 is a side view in the direction of arrow II in FIG.

FIG. 3 is a perspective view seen from the rear of the vehicle.

4 is a cross-sectional view of a main portion of a quarter portion of the combination lamp of the vehicle shown in FIG.

[Explanation of symbols]

 10 Combination Lamp 11 Lamp Housing 11a Reflector 12 Outer Lens 12e Condensing Part 12f Diffuse Reflecting Surface 13 Bulb

Claims (1)

[Scope of utility model registration request] 1. A light condensing unit for condensing a part of light emitted from a bulb on an inner surface near a boundary between a central portion and a side portion of an outer lens of a vehicle lamp and guiding the inner portion of the outer lens toward a terminal. At the same time, a diffused reflecting surface is formed on the inner surface of the outer lens near the terminal, and the light guided to the terminal is diffusely reflected and emitted to the outer side.