JPH10233106A - Automotive headlight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automotive headlight such that the back of a reflector cannot be seen from an opening from which a bulb for a position lamp is exposed. SOLUTION: In an automotive headlamp, in which a reflector 12 with a light source 14 inserted therein is enclosed in a lamp room defined by a lamp body 10 and a front lens 16 and is inclinably supported by an aiming mechanism, and in which a position-lamp bulb 70 inserted in the lamp body 10 at the back of the reflector 12 and extended forward is exposed from an opening 80 formed in the effective reflecting surface of the reflector 12, a cylindrical upright wall 82 that extends backward is formed at the edge of the opening 80, thereby narrowing a viewing field θ2 (<θ1 ) that can be seen through the opening 80, with the result that the back of the reflector 12 cannot be seen from inside the opening 80. The upright wall 82 also blocks light leakage from the opening 80 to the back of the reflector 12 that leads to harmful light.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflector-movable automobile headlamp having a position lamp function, and more particularly to an automobile head having a structure in which a bulb for a position lamp is exposed from an opening formed in the reflector. About the lamp.

[0002]

2. Description of the Related Art As a headlamp of this type, as shown in FIG. 6, a bulb 4 as a light source for a headlamp is inserted into a lamp chamber defined by a lamp body 1 and a front lens 2. The reflector 3 is tiltably supported by the aiming mechanism 5, is inserted into the lamp body 1, and the position lamp bulb 6 located behind the reflector 3 has an opening formed in the effective reflection surface of the reflector 3. By turning off the bulb 4 and illuminating the bulb 6 with a structure exposed from 7, a function as a position lamp is achieved.

[0005] Reference numeral 5 a denotes a left and right aiming screw constituting the aiming mechanism, and reference numeral 5 b denotes a ball joint constituting the aiming mechanism 5.

[0004]

However, in the above-mentioned conventional headlamp, the opening 7 can be seen through the front lens 2, and further the socket base 6a of the bulb 6 and the rear projection of the reflector can be seen through the opening 7. There was a problem that I could see it and it looked bad.

In particular, recently, when the light distribution of the headlamp is formed not in the control step formed on the front lens 2 but in the shape of the reflecting surface of the reflector 3 (such a reflector is called a free-form surface reflector). In such a case, the light distribution control step is not formed on the front lens 2 at all, or even if formed, the light distribution control step is small, so that the lamp room can be clearly seen through the front lens 2, For this reason, the reflector 7 is provided through the opening 7.
You can see even behind.

The light of the headlamp bulb 4 is:
As indicated by reference numeral L _1, but the light that contributes to the light distribution by being reflected by the effective reflecting surface of the reflector 3, as shown in FIG. 6 code L _2, leakage from the opening 7 of the reflector 3 to the rear There is also a problem that the reflected light may be reflected inside the lamp body 1 or the like and reach the front lens 2, which may lead to generation of harmful light.

Incidentally, as a solution to the above-mentioned problem, a cap is attached to the opening 7 of the reflector 3,
It is conceivable to cover the position lamp bulb 6, but it is not preferable because the number of parts is increased, the structure is complicated, the number of assembling steps is increased, and the cost is increased.
There has been a need for a simple method capable of making the rear of the reflector 3 invisible from the opening 7.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems, and has as its object to provide an automotive headlamp in which the rear of the reflector cannot be seen from an opening for exposing a position lamp bulb formed on an effective reflection surface of the reflector. Is to provide.

[0009]

In order to achieve the above object, in a vehicle headlamp according to the present invention, a reflector in which a light source is inserted is provided in a lamp chamber defined by a lamp body and a front lens. The position lamp bulb is housed, the reflector is tiltably supported by an aiming mechanism, and is inserted into a lamp body behind the reflector and extends forward.
An automotive headlamp that is exposed from an opening formed in an effective reflection surface of a reflector, wherein an upright wall extending rearward is formed on a periphery of the opening, and an opening for exposing a bulb for a position lamp is provided. The standing wall that extends rearward on the periphery is the viewing angle (field of view) that can be seen through this opening.
And narrow it. In addition, this standing wall extending rearward,
Shields light leaking from the opening to the rear of the reflector, which could cause harmful light. According to a second aspect of the present invention, in the vehicle headlamp according to the first aspect, an upright wall is formed in a cylindrical shape around the entire periphery of the opening. However, this is effective in narrowing the viewing angle (field of view) seen through the opening. In addition, the cylindrical upright wall reliably blocks light leaking from the opening to the rear side of the reflector from causing harmful light. According to a third aspect of the present invention, in the vehicle headlamp according to the first or second aspect, the filament of the position lamp bulb is positioned forward of the effective reflection surface of the reflector, and most of the light emitted from the filament is reflected by the reflector. , The amount of light from the position lamp increases.

[0010]

Next, embodiments of the present invention will be described based on examples.

FIGS. 1 to 5 show a first embodiment of the present invention. FIG. 1 is a front view of a headlamp for a vehicle with a built-in position lamp according to the first embodiment, and FIG. 3 is a horizontal cross-sectional view (cross-sectional view taken along the line II-II shown in FIG. 1), and FIG.
FIG. 4 is a horizontal cross-sectional view (cross-sectional view along line IV-IV shown in FIG. 1) of the headlamp at the position where the position lamp bulb is inserted, and FIG. 5 is a position of the headlamp. FIG. 5 is a vertical cross-sectional view (a cross-sectional view along line VV shown in FIG. 1) at a lamp bulb insertion position.

In these figures, reference numeral 10 denotes a lamp body in the form of a synthetic resin container having an open front surface, and a lamp 14 for a head lamp as a light source is provided in the lamp body 10.
A parabolic reflector 12 with a
A front lens 16 is attached to a front opening of the lamp body 10 and is integrated as a headlamp.

Reference numeral 13 denotes a valve insertion hole provided at the rear top of the reflector 12, and a valve 14 is inserted and fixed therein. Reference numeral 18 denotes a linear spring member for fixing the bulb 14, and reference numeral 19 denotes an opening for valve replacement provided at the rear top of the lamp body 10, and the opening 19 is closed by a rubber cap 19a.

The effective reflection surface 12a of the reflector 12 is
The curvature is adjusted for each predetermined region, and the free-form surface is formed so as to form a desired light distribution for a low-pass beam. Reference numeral 50 denotes a shade for forming a low-beam light distribution pattern, which is fixed to the reflector 12 and disposed in front of the bulb 14.

The light of the bulb 14 is reflected by the shade 50.
Is partially shaded by the reflector, and the effective reflection surface 12a of the reflector
The light is reflected by the effective reflection surface 12a of the reflector and is distributed in a predetermined forward direction. Therefore, the light distribution control step is not formed on the front lens 16, so that the lamp room can be completely seen through the clear front lens 16 from the front of the headlamp.

A small-pitch cylindrical step 17 is provided inside the left and right and upper and lower side walls of the front lens 16 to prevent the light room from being seen from the side of the front lens. It does not prevent the degree of sheer.

The reflector 12 penetrates through screw insertion holes 10 a and 10 b formed in the rear wall of the lamp body 10 and extends in the front-rear direction and horizontally. A pair of aiming screws 20 and 30 project from the rear surface of the reflector 12. Nut members 2 fitted to the brackets 12a, 12b thus set and screwed to the aiming screws 20, 30, respectively.
An aiming mechanism composed of the reflectors 2 and 32 and a ball joint 40 interposed between the reflector 12 and the lamp body 10 is supported so as to be tiltable in the vertical and horizontal directions.

The ball joint 40 has a ball portion 40a fixed to a bracket 12c protruding from the rear surface of the reflector 12.
And a ball receiving portion 40b projecting from the lamp body 10 and supporting the ball portion 40a. On the other hand, the aiming screws 20 and 30 are rotatably supported in the screw insertion holes 10a and 10b of the lamp body 10, respectively, and nut members 22 and 32 are respectively provided on the screw screw portions 20a and 30a extending forward. Screw
At the rear end of the screw protruding rearward of the lamp body 10, there are formed rotating operation parts 21 and 31 with which teeth of a driver D, a wrench or a wrench can be engaged.

Each of the rotating operation portions 21 and 31 is constituted by a hexagonal bolt head having a diameter larger than that of the screw shaft portion and capable of engaging with a rotating operation tool such as a spanner or a wrench. Cross-shaped grooves 21a, 31a with which the teeth of the driver can be engaged are formed on the end faces of the rotating operation parts 21, 31.

Then, using a screwdriver, the rotary operation unit 2
When the aiming screws 1 and 31 (the aiming screws 20 and 30) are rotated, the nut members 22 and 32 are
a, 30a, whereby the reflector 12 tilts up, down, left and right. That is, the aiming screw 20 constitutes a vertical aiming screw for tilting (vertically tilting) the reflector 12 around a horizontal axis Lx connecting the nut member 32 and the ball joint 40, and the aiming screw 30 comprises the nut member 22 and the ball Fitting 1
A right and left aiming screw for tilting (reflecting in the left and right direction) the reflector 12 around a vertical axis Ly connecting to zero is configured.

Reference numeral 60 denotes a frame-shaped extension reflector that extends along the side wall of the front lens 16 from a position in front of the peripheral edge of the reflector 12 in order to hide a gap between the lamp body 10 and the reflector 12. Since the same aluminum deposition surface as that of the reflector 12 is formed, the entire lighting room looks like a single metal color and has a good appearance.

Also, behind the reflector 12,
At the lower left corner of the lamp body 10 as viewed from the front, a bulb 70 for a position lamp is provided. That is, a bulb insertion hole 10c is formed on the right side of the insertion hole 10a for inserting the upper and lower aiming screws 20 of the lamp body 10, and a bulb 70 for a position lamp is inserted into the bulb insertion hole 10c.

The bulb 70 extends forward, and its front end is exposed from an opening 80 for exposing the bulb formed on the effective reflection surface 12a of the reflector 12, so that light from the bulb 70 is reflected by the effective reflection surface 12a of the reflector. The light is reflected and distributed forward.

The bulb 70 is a wedge-based bulb in which a glass bulb 74 is inserted at the front end of a long socket 72 in the front and rear direction. As shown in FIGS. It is set so as to be located in front of the reflecting surface 12a. Therefore, light from the bulb 70 (emission of the filament 75) is reflected by the entire effective reflection surface 12a of the reflector 12, and the entire front lens 16 emits light, thereby functioning as a position lamp having a large light amount.

A cylindrical upright wall 82 is provided around the periphery of the opening 80 where the glass bulb 74 of the bulb 70 is exposed.
As a result, the rear of the reflector 12 is not seen through the opening 80, and glare light is not generated due to light leaking from the opening 80.

That is, as shown in FIG.
The viewing angle (field of view) in the opening 80 seen from the
When no vertical wall is provided on the vehicle, the symbol θ _{1 in} FIG.
In the case where the cylindrical upright wall 80 is formed, the range becomes the range indicated by the symbol θ ₂ (<θ ₁ ) in FIG. Therefore, the base of the bulb socket and other things which were visible through the opening without the standing wall are hardly visible, and the appearance when the headlamp is not lit can be said to be good.

Further, when the vertical wall 82 to the opening 80 is not provided, there is a risk that harmful light generated by opening the transmitted light as shown in FIG. 6 reference numeral L _2, in this embodiment, FIG. as shown in 5 code L _3, the light to be transmitted through the opening 80 is blocked by the vertical wall 82, through the opening 80 behind the reflector 12 portion of the light bulb 14 is guided by glare, etc. No harmful light is generated.

In particular, since the upright wall 82 is a cylindrical shape formed on the entire periphery of the opening 80, it is effective in narrowing the viewing angle (field of view) even when the position E of the human eye is anywhere in the vertical and horizontal directions. In addition, it is possible to reliably block light traveling behind the reflector, which leads to glare light.

The smaller the size of the opening 80 and the longer the length of the vertical wall 82, the greater the effect of blocking or shielding the background, which is preferable. Needless to say, the size is limited to a range that does not hinder aiming, that is, a range that does not hinder smooth tilting of the reflector in the vertical and horizontal directions.

In the above-described embodiment, the effective reflection surface 12a of the reflector 12 has a free-form surface, and the front lens 16 has no light distribution control step. It is needless to say that the present invention can be applied to a headlamp using a front lens formed with a lens as long as the opening for exposing the position lamp bulb can be seen through the front lens.

[0031]

As is apparent from the above description, according to the first aspect of the present invention, the vertical angle formed in the periphery of the opening for exposing the bulb for the position lamp causes the viewing angle in the opening to be increased. The (field of view) becomes narrower, so that the back of the reflector such as the base of the bulb socket is not seen through the opening, and the appearance of the headlamp when not lit is improved accordingly. Further, the upright wall blocks light leaking from the opening to the rear side of the reflector, so that there is no possibility that harmful light is generated.
According to the second aspect, the viewing angle (field of view) in the opening is narrowed no matter where the eye is located in front of the headlamp, so that the back of the reflector can be seen through the opening even when viewed from any direction. This does not mean that the appearance of the headlamp is further improved. Further, since almost all light leaking from the opening to the rear side of the reflector can be effectively blocked, generation of harmful light is surely prevented. According to claim 3, most of the light of the filament is reflected by the effective reflecting surface of the reflector,
Since it contributes to the light distribution of the position lamp, a large amount of light is guaranteed for the position lamp.

[Brief description of the drawings]

FIG. 1 is a front view of an automotive headlamp according to a first embodiment of the present invention.

FIG. 2 is a horizontal sectional view of the headlamp (the line II shown in FIG. 1).
Sectional view along -II)

FIG. 3 is a vertical sectional view of the headlamp (the line III shown in FIG. 1).
Sectional view along -III)

4 is a horizontal cross-sectional view of the headlamp at a position where a position lamp bulb is inserted (a cross-sectional view along line IV-IV shown in FIG. 1).

FIG. 5 is a vertical cross-sectional view of the same headlamp at a position where a position lamp bulb is inserted (a cross-sectional view along line VV shown in FIG. 1).

FIG. 6 is a horizontal sectional view of a conventional automobile headlamp.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Lamp body 10c Valve insertion hole of position lamp bulb 12 Reflector 12a Effective reflection surface of reflector 13 Valve insertion hole of head lamp bulb 14 Bulb which is a light source of head lamp 16 Front lens 20 Vertical aiming which is an aiming mechanism Screw 30 Left and right aiming screw as aiming mechanism 40 Ball joint as aiming mechanism 70 Valve for position lamp 75 Filament of bulb for position lamp 80 Opening for exposing bulb for position lamp 82 Standing wall Lx Horizontal axis Ly Vertical axis

Claims (3)

[Claims] 1. A reflector having a light source inserted therein is accommodated in a lamp chamber defined by a lamp body and a front lens. The reflector is tiltably supported by an aiming mechanism, and a lamp body is provided behind the reflector. A position lamp bulb that is inserted into and extends forward is formed in an automotive headlamp that is exposed from an opening formed in an effective reflection surface of a reflector. An automotive headlamp characterized by being made. 2. The automotive headlamp according to claim 1, wherein the upright wall is formed in a cylindrical shape around the entire circumference of the opening. 3. The automotive headlamp according to claim 1, wherein a filament of the position lamp bulb is disposed forward of an effective reflection surface of the reflector.