JPS6010007Y2 - headlights - Google Patents

Description

[Detailed Description of the Invention] The present invention includes a reflector mounted on the housing within a lamp chamber defined by a housing and a lens disposed on the front surface of the housing.
Regarding headlights that support the reflector in a freely adjustable angle, it is particularly important to prevent the reference axis from shifting from the set lens prism when the reflector is tilted, thereby preventing the light distribution characteristics of the lamp from being impaired. The aim is to provide a headlight with a

In this type of headlight, the sealed beam lamp is held by a mounting ring and a retaining ring and fixed to the vehicle body or the vehicle body due to various reasons such as the design of the vehicle, air resistance, and the need to increase the size to illuminate a wide area. A headlamp has been proposed that is attached to a mounting frame so that its angle can be adjusted freely.

Conventionally, as shown in FIGS. 1 and 2, a lens 2 is disposed in a front opening 11 of a housing 1, and a reflector 3 is supported on the housing 1 so as to be adjustable in angle. .

Further, the reflector 3 has a reflecting surface portion 31 having a substantially paraboloid of revolution shape.
A flange 41 of the bulb 4 is removably attached to a bulb holder 32 fixed at the center of the rear part of the reflecting surface 31.

The reflector 3 is supported by the housing 1 at three locations, two of which are located on the upper horizontal line of the reflector 3, and one supporting section is connected to a bracket 33a fixed to the periphery of the reflector 3. Penetrates the synthetic resin screw mounting 51 attached to the housing 1,
The adjustment mechanism 5 is constructed by screwing together an adjustment screw 52 which is rotatably held in a fixed position.

The other support part is formed by press-fitting a connecting rod 61 having a spherical head 62 fixed to the bracket 33b of the reflector 3 and a ball receiving part 64 formed on a support base 63 fixed to the housing 1. A support mechanism 6 in the form of a ball joint is configured as a fulcrum.

The third support point is an adjustment mechanism 5' located on a lateral vertical line passing through the support mechanism 6 and having the same structure as the adjustment mechanism 5.

Therefore, the headlight constructed as described above has excellent advantages in terms of automobile design, air resistance, and expansion of the irradiation range.

However, in such a conventional headlamp, when the reflector 3 is tilted, the reference axis A1, that is, the reflector 3
This has the drawback that the axis based on either the central axis of the lens or the optical axis of the bulb 4 deviates greatly from the set prism of the lens 2, impairing the light distribution characteristics.

That is, since the support mechanism 6 used in the conventional headlamp is a fulcrum configured in the shape of a ball joint, for example, when the adjustment screw 52 is rotated to either the left or the right, the support mechanism 6 and the adjustment mechanism Since the vertical line passing through 5' becomes the axis of rotation and tilts the reflector 3, the reference axis A, which is perpendicular to this axis of rotation and is located at a distance, also moves by the tilted angle θ. , therefore, lens 2
Among the prism groups arranged in large numbers, the prism 21a that has been set as the location to be used will be removed.

Therefore, the prism 21b is not set after tilting.

21c... has the disadvantage that the light distribution characteristics of the lamp are impaired, such as the pre-assumed light distribution pattern being significantly disrupted.

In view of the above circumstances, the present invention has been developed to prevent the reference axis from deviating significantly from the set lens prism when the beam flaper is tilted, and to obtain a light distribution characteristic that approximates a predetermined light distribution pattern. Its purpose is to provide headlights.

Hereinafter, one embodiment of the headlamp according to the present invention will be described with reference to the drawings.

In order to better understand the present invention, the same names as in FIGS. 1 and 2 will be described with the same reference numerals.

The illustrated example in FIGS. 3 and 4 is a first embodiment of the present invention, in which 1 is a housing made of resin, and a groove 12 is provided at the periphery of a front opening 11 of this housing 1.
A reflector 3 is supported by the housing 1 so as to be adjustable in angle within a lamp chamber defined by a lens 2 and a lens 2 disposed through an adhesive or the like.

The reflector 3 is made of metal, and has a substantially paraboloid-shaped reflecting surface 31 on its inner surface, and the axis of the reflecting surface 31 is the central axis of the reflector 3. The flange 41 is removably attached to a metal or plastic bulb holder 32 to which the metal reflector 3 is fixed so that the filament of the bulb 4 is located at the focal point of the surface 31.

Therefore, the optical axis of the bulb 4 and the center axis of the reflector 3 are aligned, and this axis is taken as the reference axis A in this example.

Furthermore, as shown in FIG. 3, the reflector 3 is supported by the housing 1 at three locations, and the support locations located on the sides of the reflector 3 on the horizontal line approximately at the center are the support locations for the reflector 3.
The horizontal adjustment mechanism 5 is constituted by a screw mounting 51 attached to the bracket 33a of No. 3, and an adjustment screw 52 whose tip is screwed into the screw mounting 51.

An adjustment screw 52 of the adjustment mechanism 5 passes through the housing 1 and is rotatably held in a fixed position.

More specifically, a flange (not shown) is integrally provided approximately at the center of the adjustment screw 52, and the flange is held in a fixed position by a mounting plate (not shown) and the outer surface of the housing 1. It can be rotated.

Next, a support point located above the substantially central vertical line is a vertical adjustment mechanism 5' configured similarly to the horizontal adjustment mechanism 5 described above.

Further, another support point is an action point support mechanism 7 located on an inclined line passing through the intersection of the central horizontal line and the central vertical line and on the opposite side of each adjusting mechanism 5, 5'.

This point-of-action support mechanism 7 is a support mechanism 7 that serves as a so-called point of action that moves the reflector 3 in relation to the vertical or horizontal movement of each adjustment mechanism, and is fixed to the periphery of the reflector 3. The coil spring 71 is stretched between the bracket 33b and the hook 13 provided on the inner surface of the housing 1.

The reflector 3 supported as described above is approximately centered on the prism 21a, for example, set on the reference axis A of the lens 2, in the bulb holder 32, which is fixed with an opening near its central axis. A cap-shaped sliding surface portion 34 having a spherical back surface in contact with the spherical surface is provided around the entire circumference.

The sliding surface portion 34 includes three receiving protrusions 14aw, 14b, 14c that protrude upward on the inner surface of the housing 1, which will be described later.
is in contact with.

On the other hand, the contact points of the housing 1 are at least three prisms 2 set on the reference axis A on the inner surface of the housing 1.
Receiving protrusions 14a, 14b with a substantially radius of curvature R centered on 1a
, 14c are provided.

Note that the receiving protrusions 14a, 14b, and 14c are provided with protrusions, that is, receiving protrusions, at three locations spaced apart on the radius of curvature R centered on the set prism 21a. The receiving protrusion 14 may be provided all around the radius of curvature R without being limited to this.

Since the present invention is constructed as described above, when the adjustment screw 52 for lateral adjustment is rotated, for example, in the right direction as seen in FIG. 4, the coil spring 71 is expanded.

At this time, since the sliding surface portion 34 of the bulb holder 32 and the receiving protrusions 14at 14bt 14c of the housing 1 are provided with the same radius of curvature R centered approximately on the prism 21a set on the reference axis, they are fixed to the reflector 3. Sliding surface portion 34 having a spherical back surface of the installed valve holder 32
The prism 21a slides smoothly while constantly contacting the receiving protrusions 14at, 14b, 14c of the housing 1 and rotates by an angle of θ in the figure approximately around the set prism 21a. Since it does not deviate greatly, the reflected light from the reflector 3 does not become a loss of light and can approximate a predetermined light distribution pattern.

Further, even if an adjustment screw (not shown) of the other vertical adjustment mechanism 5' is rotated, the vertical adjustment mechanism 5' slides and rotates in the vertical direction, so that a predetermined light distribution pattern can be approximated.

Furthermore, since the sliding surface portion 34 having a spherical back surface and a spherical back surface of the bulb holder 32 fixed to the reflector 3 is constantly in contact with the receiving protrusions 14a, 14b, and 14c of the housing 1, vibrations and It is strong against impacts, etc., and has a small friction area, so it can slide smoothly.

In addition, in the above-mentioned embodiment, the receiving protrusion 14at of the housing 1
Although 14b and 14c have been described as being provided at three locations, the present invention is not limited to this, and they may be provided at three or more locations, such as 4, 5, or 6 locations. The surface portions 34 may also be provided radially at positions that coincide with the receiving projections.

Furthermore, the sliding surface portion 34 and the receiving projections 14a, 14b, 14
c may be in surface contact or point contact, and in short, any shape is sufficient as long as it slides reliably and smoothly during installation and angle adjustment.

In the illustrated example of FIGS. 5 and 6, the sliding surface portion 34 having a spherical back surface of the valve holder 32 to which the beam flap is fixed is further extended to form a bracket that supports the housing 1 in at least three locations so as to be adjustable in angle. It is formed in one piece.

That is, as shown in FIG.
is supported at three locations on the housing at its outer periphery, and the supporting locations located on the sides of the substantially central horizontal line of the bulb holder 32 extend outward from the sliding surface portion 34 of the bulb holder 32 and are inclined slightly rearward. A screw mounting 51 is attached to a bracket part 35 integrally formed as shown in FIG.
The adjustment mechanism 5 in the left and right direction is constituted by the adjustment screw 52 whose tip is screwed into the screw mounting 51.

The adjustment screw 52 of the adjustment mechanism 5 passes through the housing 1 and is rotatably held in a fixed position while being inclined toward the reflective surface portion 31 of the reflector 3.

Further, a support point located above the substantially central vertical line is a vertical adjustment mechanism 5' configured similarly to the adjustment mechanism 5 described above.

Still another support point is the point-of-action support mechanism 7 located on the inclined line passing through the intersection of the central horizontal line and the central vertical line and on the opposite side of each adjusting mechanism 5, 5'.

This action point support mechanism is the sliding surface portion 3 of the valve holder 32.
A coil spring 71 is connected via a pin 72 between a bracket part 36 which is integrally formed with a bracket part 4 extending outwardly and inclined slightly rearward, and a presser member 8 which is fastened to the inner surface of the housing 1 with a screw or the like. It is stretched.

The coil spring 71 causes the receiving protrusions 14a* 14b, 14 at three locations on the housing 1 to be attached to the sliding surface portion 34 provided on the valve holder 32 in the same manner as in the previous embodiment.
It will slide in contact with c.

This embodiment has the same effect as the previous embodiment, but since the bracket parts 35 and 36 are integrally formed at three locations extending above the sliding surface part 34 of the bulb holder 32, the sliding surface part 34 of the bulb holder 32 is further improved. This has the effect that the moving surface portion 34 can slide smoothly and reliably.

In the example shown in FIG. 6, the coil spring 71 constituting the action point support mechanism 7' shown in FIG. 5 is constructed using a plate spring 71'.

That is, a mounting seat 37 is provided on the back surface of a bracket portion 36 in which one end of a plate spring 71 bent into a substantially inverted S-shape is integrally provided on the outer periphery of the sliding surface portion 34 of the bulb holder 32. It is fixed by appropriate fixing means such as screws 9, and the other end is fixed and stretched between the inner surface of the housing 1 and the holding member 8, which is fixed to the inner surface of the housing 1 by the screws 9.

This example also produces the same effects as the above-mentioned embodiment.

As is clear from the above-mentioned embodiments, there is a housing in which a lens is arranged in the front opening, a bulb holder for attaching a bulb flange to the housing is fixed, and a flaper etc. is supported in at least three positions so that the angle can be adjusted freely. The bulb holder is provided with a sliding surface portion having a spherical back surface that is in contact with a spherical surface approximately centered on a prism set on a reference axis, and a nozzle that comes into contact with the sliding surface portion. The housing is provided with receiving protrusions having a radius of curvature approximately centered on the set prism at at least three locations, and two of the supporting locations are provided with adjustment mechanisms and the other location is associated with each of the adjustment mechanisms. The valve holder is characterized in that the reflector is slidably rotated approximately around the center of the prism through the sliding surface portion, and the support mechanism serves as a point of action. When the reflector is tilted through the sliding surface of the prism, the reference axis will not deviate significantly from the set prism, ensuring a light distribution characteristic that approximates the pre-assumed light distribution pattern. It is possible to obtain a novel headlamp that can slide reliably and smoothly when adjusting the angle.

It should be noted that, as a matter of course, the present invention is not limited to the above-mentioned embodiments.

[Brief explanation of the drawing]

Figures 1 and 2 show conventional headlights, with Figure 1 being a front view, Figure 2 being a sectional view taken along line I-I in Figure 1, Figures 3 and 4.
The figures show an embodiment of the headlamp of the present invention, Fig. 3 is a front view of the headlamp, Fig. 4 is a sectional view taken along the line ■-■ in Fig. 3, and Fig. 5
The figure is a sectional view showing a second embodiment of the invention, and FIG. 6 is a sectional view showing a third embodiment of the invention. 1... Housing, 11... Front opening, 14a, 14bt 14c... Receiving projection, 2
... Lens, 21 ... Prism, 3.
...Reflector 132 ... Valve holder, 34 ... Sliding surface section, 4 ... Valve, 5, 5' ... Adjustment mechanism, 7...Action point support mechanism, A...Reference axis.

Claims (1)

[Scope of utility model registration request] A headlamp comprising a housing in which a lens is arranged in the front opening, and a bulb holder for attaching a bulb flange to the housing, or a flaper etc. is supported in at least three positions so as to be adjustable in angle. , the bulb holder is provided with a sliding surface portion having a spherical back surface that is in contact with a spherical surface approximately centered on a prism set on a reference axis, and the housing that comes into contact with the sliding surface portion is provided with the sliding surface portion set at at least three locations. A receiving projection having a radius of curvature approximately centered on the prism is provided, and two of the support locations are used as adjustment mechanisms, and the other location is used as a support mechanism that becomes a point of action in relation to each of the adjustment mechanisms, A headlamp characterized in that the reflector is configured to slide and rotate approximately around the prism through the sliding surface portion.