JPH0514403Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a projector type automobile headlamp.

[Conventional technology]

Automobile headlights must have a light distribution pattern that brightly illuminates the area in front of the vehicle's own lane and does not dazzle oncoming vehicles.

A projector-type automobile headlamp has been proposed as a headlamp that has light distribution characteristics that meet the above requirements, has a simple lens configuration, and can be made compact in overall size. As the latest technology regarding this projector type headlamp, for example, Japanese Patent Application Laid-Open No. 58-209801 is known.

FIG. 3 shows the above-mentioned known projector type headlamp. The headlight of this known example is provided with a shell-shaped reflector, and the axial cross section of the inner reflective surface of this reflector each forms a part of an ellipse, and the eccentricity of the ellipse is perpendicular to the axial direction. In a vehicle headlamp increasing from the longitudinal section to the axially horizontal longitudinal section, the elliptical portion 10 of every axial section
The focal points 105 of 1,102 and the corresponding vertices 104 of the elliptical portions 101, 102 of all axial sections coincide.

110 is the outer focus of the ellipse 102, 110 is a light shielding plate-like dimmer, 112 is the outer focus of the ellipse 101,
113 is a lens.

FIG. 4 is a plan view schematically depicting an example of this type of projector type headlamp, FIG. 5 is a side view, and FIG. 6 is a front view.

1 is a concave mirror, and F is its focal point. The light source bulb 2 is provided so that the filament is located near the focal point F mentioned above.

A convex lens 3 is provided to share the optical axis Z with the concave mirror 1 described above.

I-J drawn in FIG.
The light reflected by the rays enters this meridional image.

The above-mentioned incident light is modulated by the convex lens 3 and projected forward (to the right in FIGS. 4 and 5).

When a screen is provided near the meridional image plane and the light distribution pattern is shown as an isoluminance curve, it becomes as shown in FIG. H-H is the horizontal line of the screen, V
-V is also a vertical line.

As shown in FIGS. 4 to 6, a shade 4 having an edge along the meridional image plane is provided. Specifically, as shown in 4a in FIG. 6, a cut line 4a is formed so as to recede downward from the horizontal section ij of the meridional image plane. FIG. 7 shows how the light distribution pattern described above and the shade 4 overlap. As shown in FIG. 7, the upper half of the light beam passes through. Although most of the lower half is blocked, light is allowed to pass through the portion corresponding to the cut line 4a.

As the partially covered light beams as described above are focused on the meridional images i-j and intersect with each other, the light beams projected in front of the headlights have a pattern that is an inversion of FIG. 7. form. FIG. 8 is an explanatory diagram showing the general shape of a light projection pattern using isoluminance curves on a screen provided in front of the headlight.

This conventional example is configured for left-hand traffic, and in the case of right-hand traffic, the left and right sides of FIGS. 6 to 8 are configured to be opposite.

FIG. 9 is a vertical cross-sectional view of an automobile headlamp equipped with a projector unit constructed by applying the above-mentioned projector type lamp.

A concave mirror 1, a light source bulb 2, a convex lens 3,
A projector unit 5 includes a shade 4 and is housed in a lamp housing 6. 7 is a cover.

9 is a frame, which has a concave mirror 1 and a convex lens 3.
A projector unit 5 is constructed by supporting a shield 4 and a shade 4.

When this headlight (Fig. 9) is viewed from the front (left side of the figure), it is desirable from a design point of view that the components of the projector unit 5 other than the convex lens are visible through the front cover 7. Therefore, an inner panel 10 is provided to partition the interior space of the lamp housing 6 into front and rear parts. 10a is an aperture provided so as not to block the projected light flux.

[Problem that the invention attempts to solve]

The illustrated arrow Z is the optical axis of the projector unit 5. In order to create a structure in which the direction of the optical axis can be adjusted, the following configuration is used.

The fixed bracket 8 is fixedly installed with respect to the lamp housing 6.

A rotating bracket 11 is rotatably supported about a vertical axis 12 with respect to the fixed bracket 8 mentioned above.

The projector unit 5 is rotatably supported by a horizontal shaft 13 with respect to the rotary bracket 11 described above.

When the adjustment screw 14a is turned, the projector unit 5 rotates around the horizontal axis 13, and the optical axis Z is tilted in the vertical direction.

Although not shown in FIG. 9, the projector unit 5 can be oscillated in the left-right direction (perpendicular to the plane of the paper) around the vertical axis 12 by a structure similar to the adjustment screw 14a described above.

However, when the projector unit 5 is rotated around the vertical axis 12 and the horizontal axis 13 in order to adjust the optical axis Z of the projector unit 5, the concentricity between the aperture 10a of the inner panel 10 and the convex lens 3 changes. As a result, the gap around the convex lens 3 becomes non-uniform, spoiling the appearance and lowering the commercial value.

The present invention was created to solve the above-mentioned problems, and is a projector that does not change the relative position between the convex lens of the projector unit and the inner panel opening even if the optical axis direction of the projector unit is adjusted. The purpose of this invention is to provide an automobile headlamp using an Ekta unit.

[Means for solving problems]

In order to achieve the above object, an automobile headlamp using the projector unit of the present invention has a convex lens, which is a component of the projector unit, attached to the frame that supports the reflector on its outer circumferential side. An extending flange is provided, and the inner panel is provided with a boss that abuts the front side of the flange, and a cover portion that extends outward from the flange that is integrally connected around the boss, The inner panel is fixed to the frame by screwing a mounting screw passing through the flange from behind into the boss of the inner panel and tightening it.

However, in this invention, the terms "front" and "back" refer to the light projection direction as the front, and the opposite direction as the "back".
shall be.

[Effect]

As described above, when the inner panel is fixed to the projector unit, when the projector unit is rotated vertically or horizontally with respect to the lamp housing, the inner panel will move vertically or horizontally along with the projector unit.
Move left or right. Therefore, even if the optical axis of the projector unit is adjusted, the concentricity between the projector unit and the inner panel opening does not change.

〔Example〕

FIG. 1 is a horizontal sectional view of an embodiment of an automobile headlamp using a projector unit according to the present invention.
FIG. 2 is a vertical sectional view of the above embodiment.

(See FIG. 1) This embodiment is a combination lamp incorporating a projector unit 5, and the projector unit 5 and an adjacent lamp 15 are installed in a lamp housing 6.

15a is the light source bulb of the adjacent lamp, 15b is the same reflector, 15c is the same inner panel, 1
Similarly, 5d is an optical axis adjustment screw.

As shown in FIGS. 1 and 2, a flange 9a is integrally provided on the frame 9. This flange 9a
is a so-called outer flange shape that extends from the frame 9 toward the outer periphery.

On the other hand, the inner panel 10 has the above-mentioned flange 9
A cover portion 10c extending outward from the flange 9a is integrally arranged around a boss 10b that abuts on the front side surface of the flange 9a.

A mounting screw 16 passed through the flange 9a from the rear side thereof is screwed into the boss 10b and tightened. As a result, the inner panel 10
is fixed to the frame 9, and the mounting screws 16 are not visible. Reference numeral 14b shown in FIG. 1 is an adjustment screw for adjusting the optical axis Z of the projector unit 5 to the left and right.

According to this embodiment, even if the optical axis direction of the projector unit 5 is adjusted vertically or horizontally, the convex lens 3
The relative position between the inner panel opening 10a and the inner panel opening 10a does not change.

[Effect of idea]

As described in detail above, when the automobile headlamp using the projector unit according to the present invention is applied, even if the optical axis direction of the projector unit is adjusted, the convex lens of the projector unit and the inner panel opening are The relative position of does not change. Therefore,
While maintaining the function that components other than the convex lens do not appear on the outside, there is no possibility that the gap size between the convex lens and the inner panel opening will change due to optical axis adjustment and spoil the appearance.

[Brief explanation of the drawing]

1 and 2 show an embodiment of an automobile headlamp using a projector unit according to the present invention, with FIG. 1 being a horizontal sectional view and FIG. 2 being a vertical sectional view. FIG. 3 is an explanatory diagram of a known projector type headlamp. Figures 4 to 6 show conventional projector type headlights, with Figure 4 being a plan view and Figure 5 being a plan view.
The figure is a side view, and FIG. 6 is a front view. FIGS. 7 and 8 are charts showing the optical characteristics of the above-mentioned conventional example. FIG. 9 is a sectional view of a conventional example. 1...Concave mirror, 2...Light source bulb, 3...Convex lens, 4...Shade, 5...Projector unit, 6...Lamp housing, 7...Front cover, 8...Fixing bracket, 9...Frame , 9
a...Flange, 10...Inner panel, 10a
...Opening, 10b...Boss, 10c...Cover portion, 11...Rotating bracket, 12...Vertical axis,
13...Horizontal shaft, 16...Mounting screw.

Claims (1)

[Claims for Utility Model Registration] A projector in which a light source bulb is installed near the focal point of a reflector, the light emitted from the light source bulb is reflected by the reflector, and the reflected light is projected forward by a convex lens. The projector unit is rotatably supported within the lamp housing, an inner panel is provided within the lamp housing, and an opening is provided in the inner panel so that the convex lens faces the opening. In this automobile headlamp using a projector unit, a frame for supporting a convex lens is provided with respect to the reflecting mirror, and a flange is provided extending from the frame in an outer circumferential direction, and the above-mentioned The inner panel is formed with a boss that comes into contact with the front side of the flange, and a cover that extends outward from the flange that is connected around the boss. An automobile headlamp using a projector unit, characterized in that a penetrating mounting screw is screwed into a boss of the inner panel to fix the inner panel to a frame.