JPH074165U - High mount stop lamp - Google Patents

Abstract

(57) [Abstract] [Purpose] The light emitted from the bulb can be effectively used, and brighter illumination can be obtained with a small number of bulbs. [Structure] A light guide 7 is interposed between the bulb 4 and the lens 6. The light guide body 7 is composed of first and second light guide bodies 7A and 7B, and a valve insertion hole 43 into which the valve 4 is inserted is formed in the second light guide body 7B, and a reflector is provided on the rear surface of the light guide body 7. 21
To arrange.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a high mount stop lamp arranged in a rear spoiler provided on a rear upper surface of a vehicle body of an automobile or on a rear panel in a vehicle compartment facing a rear window glass.

[0002]

[Prior art]

 In recent automobiles, a lamp is installed in the rear projecting end of the rear spoiler provided on the upper surface of the rear part of the vehicle body or in the vehicle interior, and this is turned on together with the brake light when the brake is operated, so that the driver of the following vehicle can be reminded even more. The safety is ensured (eg, Japanese Utility Model Application Laid-Open No. 63-151335, Japanese Patent Application Laid-Open No. 1-233130, Japanese Patent Application Laid-Open No. 1-160751, etc.). Such a lamp is generally called a high mount roof lamp. As a light source of this high mount stop lamp, a general bulb (incandescent light bulb) and a light emitting diode are used (eg, Japanese Utility Model Publication No. 63-151335, Japanese Patent Application No. 1-146376, Japanese Utility Model Publication No. 2-4404). Issue Bulletin, etc.).

FIG. 4 shows a conventional high mount stop lamp disclosed in Japanese Utility Model Laid-Open No. 63-151335, and the high mount stop lamp 1 is inside a rear spoiler 3 installed on a rear upper surface of a vehicle body 2. A bulb 4 is installed in the rear side of the rear spoiler 3. The light 5 emitted from the bulb 4 is fitted into an opening 3a formed in the rear projecting end face of the rear spoiler 3 and is fixed through a light guide 7 to a lens 6 as a light emitting portion. It is configured to guide.

[0004]

[Problems to be solved by the device]

 However, in the above-described conventional high mount stop lamp 1, a part of the light emitted from the bulb 4, that is, the light 5 entering the light guide 7 from the light entrance surface 7a of the light guide 7 that faces the bulb 4. Since it is only used, there is a problem in terms of effective use of light, and it was necessary to increase the number of bulbs 4 to obtain bright illumination.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to make it possible to effectively use the light emitted from the bulbs and to reduce the number of bulbs. It is to provide a high-mount stop lamp designed to obtain bright illumination.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a high-mount stop that guides the light emitted from the bulb to the light emitting part by disposing a light guide between the bulb and the lens forming the light emitting part. In the lamp, a bulb insertion hole is formed facing the bulb-side end of the light guide, and the one end face of the light guide is covered with a reflector, and the bulb insertion hole is provided on the side opposite to the reflector. The end surface facing the lens is an emission surface for emitting the light of the bulb.

[0007]

[Action]

 In the present invention, the light emitted from the bulb enters the light guide body from the inner peripheral surface of the bulb insertion hole, and the light emitted from the end surface of the light guide body on the side opposite to the emission surface hits the reflector and is reflected. Then, it re-enters the light guide body. Therefore, the light loss is small.

[0008]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a sectional view showing an embodiment of a high mount stop lamp according to the present invention, FIG. 2 is a partially cutaway plan view of a main portion of the lamp without a cover, and FIG. 3 is a front view of the main portion of the lamp. is there. In the figure, the same components as those in FIG. 4 are designated by the same reference numerals. In these drawings, the present embodiment shows an example of installation in a vehicle compartment, 10 is a rear window glass of an automobile, 11 is a rear panel, 12 is a vehicle body, 13 is a trunk room, and 14 is an inner surface of the rear window glass 10. It is a high mount stop lamp arranged in a space 15 formed between the rear panel 11 and the vehicle body 12.

The rear window glass 10 is inclined toward the front side of the vehicle body by a predetermined angle, and has two strip-shaped light-shielding portions 16A and 16B that are long in the left-right direction and are vertically spaced apart from each other in the lower portion of the inner surface. These strip-shaped light shielding portions 16A and 16B are provided corresponding to the rear panel 11 and the vehicle body 12, respectively, and thereby prevent the rear panel 11 and the vehicle body 12 from being viewed through the rear window glass 10 from the rear of the vehicle body. A glass portion between the light-shielding portions 16A and 16B forms a transparent portion 10A and faces the high mount stop lamp 14. In addition, 17 is a gasket.

The high mount stop lamp 14 includes a housing 20, a bulb 4, a light guide 7 and a reflector 21 arranged in the housing 20, a lens 6 and a shade 22 arranged on the front side of the housing 20. Etc.

The housing 20 has a body 23 made of white resin or the like, and a cover 24 also made of white resin or the like and fitted and fixed to the upper opening of the body 23 to form a thin box type elongated in the left-right direction. The front half portion 20A is thinner than the rear half portion 20B and is located above, and the connecting portion between the front half portion 20A and the rear half portion 20B forms an inclined portion 20C that is inclined at a required angle.

The valve 4 is mounted in the rear half 20 B of the housing 20 from the trunk room 13. Therefore, the valve 4 is inserted into the bottom surface of the rear end of the vehicle body 12 and the body 23 from below. An insertion hole 26 and a valve mounting hole 27 are formed respectively.

The lens 6 is attached to the front opening 28 of the housing 20 via the shade 22. The shade 22 is formed in a laterally elongated tubular body by resin molding and is fitted into the front opening 28 of the housing 20, and the folded portion 22a connected to the front opening is formed in the housing. It is fitted to the outer side surface of the front opening 28 of 20. Two engaging holes 30 and 31 are provided on the upper and lower surfaces of the rear end of the shade 22 side by side in the front-rear direction. The engaging holes 30 on the rear side project to the inner surface of the front end of the housing 20. The triangular protrusions 32 provided are fitted and locked to prevent the shade 22 from coming off.

The lens 6 is formed of a translucent resin colored in red in the shape of a horizontally long thin box that opens to the back side, and has a diffusion step (not shown) formed of a large number of small convex lenses on the inner surface. A peripheral projection 6a formed on the peripheral edge of the back surface integrally with the peripheral wall 6a has triangular projections 33 projecting on the upper and lower surfaces of the peripheral wall 6a. The lens 6 is fitted and locked in the hole 31 to prevent the lens 6 from coming off.

The light guide 7 is composed of one first light guide 7A and a plurality of second light guides 7B. The first light guide body 7A is formed of a transparent resin such as acrylic resin in the left-right direction and is formed into a plate-like body whose thickness gradually increases from the front end to the rear end. The housing 20 is inclined at substantially the same angle as the inclined portion 20C of the housing 20, and is fixed to the inner bottom surface of the body 23 by a plurality of set screws 34. The front surface of the first light guide 7A closely faces the inner surface of the lens 6 to form an emission surface 35, and the rear surface is formed with a plurality of parabolic surfaces 36 that are convex toward the rear side in the width direction. Further, semi-circular fitting recesses 37 into which the second light guide 7B is fitted are provided at the tops of the paraboloids 36, respectively. Further, in the front-rear direction intermediate portion of the first light guide 7A, in the front of each fitting recess 37, an equilateral triangular or isosceles triangular hole 38 is formed penetrating the upper and lower surfaces. The hole 38 is provided to reflect the direct light 39 having a small emission angle emitted from the bulb 4 toward the front to eliminate the uneven brightness of the lens 6, and is formed with the apex 41 facing rearward. The emitted light 39 is reflected obliquely forward.

The second light guide 7B is made of a material having a higher heat resistance than the first light guide 7A, for example, glass, and is formed into a deformed disc shape. A valve insertion hole 43 is provided, and the valve 4 is inserted into the valve insertion hole 43 from below. The front surface of the second light guide 7B is formed into an arc surface 44 and is joined to the inner surface of the fitting recess 37 by welding or the like, and the rear surface exposed rearward from the fitting recess 37 is the same as the paraboloid 36. Is formed on the parabolic surface 45 having the curvature. The bulb insertion hole 43 is formed so that its center coincides with the focal point P of the paraboloids 36 and 45. The second light guide 7B is formed so that the plate thickness at the central portion is the largest and becomes thinner toward the outer peripheral portion. Further, the outer peripheral portion on the front side of the second light guide 7B is a fitting groove formed on the inner peripheral surface of the fitting recess 37 in order to efficiently transmit the light from the bulb 4 to the first light guide 7A. It is fitted with 47.

The reflector 21 is formed of a metal plate or the like, has a front surface that forms a reflection surface, and is in close contact with the rear surfaces that are paraboloids of the first and second light guides 7A and 7B. Further, the reflector 21 integrally has a plurality of shade portions 21a extending forward and covering the upper side of each second light guide 7B, and is fixed to the inner bottom surface of the body 23 by a set screw 48. There is.

Thus, according to the high mount stop lamp 14 having such a configuration, light loss is small, the lens 6 can be illuminated brightly with a small number of bulbs, and the visibility from the rear can be improved. That is, at the time of lighting, most of the horizontal light emitted from the bulb 4 enters the second light guide 7B from the inner peripheral surface of the bulb insertion hole 43, and the light traveling toward the front side thereof is the first light. The light that passes through the inside of the light guide 7A and is emitted from the emission surface 35 to illuminate the lens 6, and the light traveling toward the rear side is once emitted to the outside of the second light guide 7B, but once reflected by the reflector 21, the lamp optical axis. Becomes parallel light to the second light guide body 7B, re-enters the second light guide body 7B, passes through the first light guide body 7A, exits from the exit surface 35, and illuminates the lens 6, and the light further traveling in the left-right direction is second light. When the light passes through the light guide 7B and is reflected by the parabolic surface 36 of the first light guide 7A, it becomes parallel light that is parallel to the optical axis of the lamp and is emitted from the emission surface 35 to illuminate the lens 6, resulting in loss of light. Is extremely small, and the lens 6 can be illuminated brightly. Further, of the light emitted from the bulb 4, the direct light 39 having a small outgoing angle toward the front is reflected obliquely forward by the hole 38 provided in the first light guide 7A, so the bulb 4 of the lens 6 is provided. The brightness of the portion corresponding to is reduced, and uneven brightness can be prevented. Therefore, the lens 6 can be illuminated with substantially uniform brightness over the entire surface. Further, since the second light guide 7B is made of a material having high heat resistance, the bulb 4 can be arranged close to each other, and the light loss can be further reduced.

Although the above embodiment has been described with respect to the case where the high mount stop lamp is installed in the vehicle compartment, the present invention is not limited to this, and it goes without saying that it may be incorporated in the rear spoiler. . Further, although the light guide 7 is composed of the first and second light guides 7A and 7B in the above-mentioned embodiment, it may be one light guide formed integrally.

[0020]

[Effect of device]

 As described above, according to the high mount stop lamp of the present invention, the bulb insertion hole into which the bulb is inserted is formed at the bulb-side end of the light guide, and the one end surface of the light guide is covered with the reflector. Therefore, the loss of light is extremely small, and therefore the lens can be illuminated brightly with a small number of bulbs, and the visibility from the rear can be improved. Further, the structure is simple and can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a high mount stop lamp according to the present invention.

FIG. 2 is a partially cutaway plan view of a main part of the lamp with a cover removed.

FIG. 3 is a front view of a main part of the lamp.

FIG. 4 is a cross-sectional view of a conventional high mount stop lamp.

[Explanation of symbols]

 1 High Mount Stop Lamp 2 Car Body 3 Rear Spoiler 4 Bulb 6 Lens 7 Light Guide 7A First Light Guide 7B Second Light Guide 10 Rear Window Glass 11 Rear Panel 12 Car Body 20 Housing 21 Reflector 22 Shade 23 Body 24 Cover 35 Exit Surface 43 Valve insertion hole

Claims (1)

[Scope of utility model registration request] 1. A high mount stop lamp, wherein a light guide is disposed between a bulb and a lens forming a light emitting portion, and the light guide guides light emitted from the bulb to the light emitting portion. A bulb insertion hole is formed facing the bulb-side end of the light body, into which the bulb is inserted, and one end face of the light guide is covered with a reflector, and the end face opposite to the reflector faces the lens. Is a high-mount stop lamp, characterized in that is used as an emission surface for emitting light from the bulb.