JPS6010008Y2 - 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.
With regard to 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, which may impair the light distribution characteristics of the lamp. It is intended to provide a headlight that is not available.

Due to various reasons such as the design of the vehicle, air resistance, and the need to increase the size of the vehicle to illuminate a wide area, this type of headlight is designed to hold the sealed beam lamp with a mounting ring and a retaining ring, and is attached to the vehicle body or a mounting frame that is attached to the vehicle body. A headlight whose angle can be adjusted freely has been proposed.

Conventionally, as illustrated 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 by the housing 1 so as to be able to adjust its angle.

Further, the reflector 3 is formed with a reflecting surface section 31 having a substantially paraboloid of revolution shape, and a flange section 41 of the bulb 4 is detachably attached to a bulb boulder 32 fixed at the rear center of the reflecting surface section 31. .

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

The other is a ball that forms a fulcrum 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 joint-like support mechanism 6 is configured.

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

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

It has the disadvantage of impairing light distribution characteristics.

In other words, the support mechanism 6 used in conventional headlights
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 right, the vertical line passing through the support mechanism 6 and adjustment mechanism 5' becomes the rotation axis, and the reflector 3 Since the lens 2 is tilted, the reference axis A, which is perpendicular to the axis of rotation and located at a distance, also moves by the tilted angle θ. In the middle, the prism 21a is set as the location to be used.

Therefore, after tilting, the prism 21by2 is not set.
1c, there is a drawback that the light distribution characteristics of the lamp cannot be ensured, such as the pre-assumed light distribution pattern being significantly disrupted.

Furthermore, since the adjustment mechanisms 5 and 5' have the tips of the adjustment screws 52 screwed together with the screw mounting 51, when the adjustment screws are rotated in the direction of loosening when adjusting the angle, the screw mounting 51 is removed from the threaded portion of the adjustment screws 52. There is a risk of it falling off, and once it falls off, it is difficult to assemble it, and the angle of the reflector cannot be adjusted.

In view of the above-mentioned circumstances, it is an object of the present invention to prevent the reference axis from being largely deviated from the set lens prism when the beam flaper of the present invention is tilted, and to ensure a light distribution characteristic that approximates a predetermined light distribution pattern. It is an object of the present invention to provide a headlamp that can reliably and smoothly adjust the angle by preventing the adjustment screw from falling off from the screw mounting when adjusting the angle.

Hereinafter, an example of implementation of a headlamp according to the present invention will be described with reference to the accompanying drawings.

The illustrated example in FIGS. 3 and 4 is a first embodiment of this invention, in which 1 is a housing made of synthetic resin, and a groove 12 is provided at the periphery of the front opening 11 of the housing 1. The leg portion 22 of the lens 2 disposed on the front surface is fixed by applying an adhesive 9 to the housing 1, and the reflector 3 is attached to the housing 1 at an angle through a mounting ring 81, which will be described later. Adjustably supported.

The reflector 3 is made of metal, and has a substantially paraboloid-shaped reflecting portion 31 formed on its inner surface, and the axis of the reflecting portion 31 is the central axis of the reflector 3. A flange portion 41 is removably attached to a bulb holder 8 having the reflector 3 fixed to its periphery so that the filament of the bulb 4 is located at the focal point of the portion 31.

Therefore, the optical axis of the bulb 4 and the center axis of the reflector 3 are made to coincide with each other, and this axis is defined as the reference axis A in this example, and the bulb holder 8 is arranged around the reference axis A of the front lens 2. A mounting ring 81 is formed with a spherical sliding surface portion 81a on the back surface so as to be in contact with a spherical surface approximately centered on the set prism 21a.

Further, the spherical sliding surface portion 81a provided on the back surface of the mounting ring 81 is provided with receiving protrusions 14a at at least three locations on the inner surface of the housing 1 so as to be in constant contact with each other.

14b and 14c are provided.

In detail, the receiving protrusions 14a and 14b provided at the three locations
14c are receiving protrusions 14a, 14bt 14c having a radius of curvature R approximately centered on the set prism 21.

Note that the receiving protrusions 14at, 14bt, and 14c are not limited to three locations, but four locations approximately on the radius of curvature R,
The receiving projections may be provided at three or more locations, such as five locations, and furthermore, the receiving projections may be provided on the entire circumference of the radius of curvature R.

The reflector 3 and the mounting ring 8
1 is supported by the housing 1 at three locations as shown in FIG.

That is, the support portions located on the sides of the approximately center horizontal line of the reflector 3 are the brackets 32a of the reflector 3.
The adjustment mechanism 5 in the left and right direction is constituted by a screw mounting 51 attached to the screw mounting 51 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 is possible to rotate.

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

Furthermore, the other supporting 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 of the adjusting mechanisms 5, 5'.

This action point support mechanism 7 moves the reflector 3 via a mounting ring 81 in relation to the vertical movement or horizontal movement of each adjustment mechanism.

The support mechanism 7 serves as a so-called point of action, and a bracket portion 82 is integrally formed on the periphery of the mounting ring 81, and is stretched between the bracket 82 and the hook portion 13 provided on the inner surface of the housing 1. The coil spring 71 is made up of a coil spring 71.

Further, the spherical sliding surface portion 81a provided on the back surface of the mounting ring 81 constantly contacts the three receiving protrusions 14a, 14b, and 14c protruding from the inner surface of the housing 1, and slides smoothly during adjustment. However, each of the adjustment mechanisms 5, 5' has the tip of the threaded part of the adjustment screw 52 screwed into the screw mounting 51, so when adjusting the angle, the adjustment screw 52
If the screw mounting ring 51 is rotated in the loosening direction (the direction in which the beam flap 3 moves upward in the figure), the screw mounting 51 may fall off from the tip of the threaded portion of the adjustment screw 52. Stoppers 83a, 83b, and 83c are provided to protrude rearward in the direction of the center portion (reference axis A) of the surface portion 81a.

More specifically, the stoppers 83a, 83b, 83c
are three receiving protrusions 14a, 1 provided on the housing 1.
It is provided inward of 4b and 14c.

Although three stoppers 83a, 83b* and 83c are provided, the adjustment screw 52 for adjustment is
The receiving protrusion 14av of the housing 1 prevents the tip of the threaded portion from falling off the screw mounting 51.
14bg and 14c may be set so as to collide with each other, and furthermore, they may be arranged in an annular shape.

In such an example, the contact portions are the receiving protrusions 14a, 14b, 1
It is 4c.

With the above structure, for example, when the adjustment screw 52 for left-right adjustment is rotated in the right direction as viewed in FIG. 4, the coil spring 71 is expanded.

At this time, the cut-off lever 3 is fixed to the mounting ring 81 via the valve holder 8, and the spherical sliding surface portion 8 provided on the back surface of the mounting ring 81
1a and at least three receiving protrusions 14a, 14b, and 14c provided on the housing 1 are provided with the same radius of curvature R about the prism 21a set on the reference axis A, so that the mounting ring 81 The sliding surface portion 81a on the back surface is connected to the receiving protrusions 14a, 1 provided on the housing 1.
4b and 14c, the reflector 3 slides and rotates approximately at the set prism 21a at an angle indicated by θ in the figure, and furthermore, when the reflector 3 is tilted over a certain angle, In this example, the stopper 83b provided on the inner surface of the housing 1 collides with the inner wall of the receiving protrusion 14b, which also serves as an abutting portion, and is prevented from further rotation. This prevents the screw mounting 51 from falling off from the tip.

Therefore, since the prism 21a is not significantly deviated from the prism 21a unlike in a conventional headlamp, there is no loss of light reflected from the flutter 3, and a light distribution characteristic that approximates a predetermined light distribution pattern can be obtained. .

Further, even if an adjustment screw (not shown) of the vertical adjustment mechanism 5' is rotated, the light distribution pattern can be approximated to a predetermined light distribution pattern because the adjustment screw (not shown) of the vertical adjustment mechanism 5' is slid and rotated in the vertical direction.

Further, the spherical sliding surface portion 81a provided on the back surface of the mounting ring 81 is fixed to the valve holder 8 of the mounting ring 81, and the spherical sliding surface portion 81a provided on the back surface of the mounting ring 81 is connected to at least three receiving protrusions 14a, 14 provided on the housing 1.
b, 14c, it is strong against vibrations, shocks, etc., and the friction area is small, so it can slide smoothly.Furthermore, the mounting ring 8
Stoppers 83 a, 83 b are provided in at least three locations on the housing 1 toward the center of the sliding surface portion 81 a of the housing 1 and collide with receiving protrusions 14 a, 14 b, 14 c, which also serve as abutting portions in this example. 83c, there is no fear that the screw mounting 51 will fall off from the tip of the threaded portion of the adjustment screw 52 during adjustment.

Incidentally, in the above embodiment, each adjustment mechanism 5, 5' is supported by the bracket 32 of the reflector 3. It may also be supported by

Furthermore, the sliding surface portion 81a and the receiving projections 14a, 14F)
, 14c may be 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.

The illustrated example in FIG. 5 is the stopper 83 a of the above-mentioned embodiment.
e 83 b, 83 c mounting ring 81
It is configured to be provided around a spherical sliding surface portion 81a provided on the back surface of the.

This embodiment has the same effects as the previous embodiment.

FIG. 6 shows yet another modified example for preventing the tip of the threaded portion of the adjusting screw 52 from falling off the screw mounting 51 when adjusting the angle of each adjusting mechanism 5, 5'. At least three stoppers 15a and 15b are provided on the inner surface of the housing 1.
t 15c protrudes, and this stopper 15ay 1
5bt 15c makes the mounting ring 81 (
In detail, when the flapper 3 slides at a certain angle, the contact portions 84a, 8 are attached to the edge of the mounting ring 81.
4bv84c is provided.

This example also has the same effect as the above-mentioned example.

As is clear from the above-described embodiments, the headlight of the present invention includes a housing in which a lens is disposed in the front opening, a mounting ring having a bulb holder on which a bulb is mounted and a reflector fixed thereon, and the mounting ring. A spherical sliding surface portion approximately centered on a prism set as a reference axis is provided on the back surface of the ring, and receiving protrusions are provided at at least three locations on the housing that comes into contact with the sliding surface portion, and the mounting ring or A stopper is provided on either one of the housings, and an abutting portion that abuts against the stopper is provided on the other side, and further, the reflector is supported on the housing at least three locations in a freely adjustable angle, and two of the support locations are provided. The prism is configured as an adjustment mechanism, and one other location is used as a support mechanism as a point of action in relation to each of the adjustment mechanisms, so that the reflector can be slid approximately around the center of the prism through the mounting ring. Since the reflector is configured to be rotated, when the reflector is tilted through the sliding surface of the mounting ring, the reference axis does not deviate significantly from the set prism, and the pre-assumed arrangement is maintained. It is possible to secure light distribution characteristics that approximate the light pattern, and it also allows for reliable and smooth sliding during installation and angle adjustment, and also prevents the adjustment screw from falling off from the screw mounting when adjusting the angle. This provides effects such as obtaining a headlamp with good angle adjustment.

It goes without saying that the headlamp of the present invention is not limited to the embodiments described above.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional headlamp, Figure 1 is a front view, Figure 2 is a sectional view taken along the line I-I in Figure 1, and Figures 3 and 4 are before the present invention. 3 is a front view of the headlight, FIG. 4 is a sectional view taken along the line ■-■ in FIG. 3, and FIG. 5 is a sectional view showing the second embodiment of the present invention. Figure, 6th
The figure is a sectional view showing a third embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Housing, 11... Front opening, 14at 14b, 14c... Receiving protrusion and contact portion, 2... Lens, 21... ...Prism, 3...Reflector-14...
Valve, 8...◆...Valve holter-181...
...Mounting ring, 81a...Sliding surface portion, 83a, 83b, 83c, 15at 15b. 5c...Stopper, 84a, 84b, 84c
・・・・・・Contact part, 5, 5'・・・Adjustment mechanism,
7...Action point support mechanism, A...Reference axis.

Claims (1)

[Scope of utility model registration request] A housing in which a lens is arranged in the front opening, a mounting ring having a bulb holder to which a bulb is attached and a reflector fixed thereto, and a number on the back of the mounting ring approximately centered on a prism set as a reference axis. A planar sliding surface is provided, and the housing that abuts the sliding surface is provided with receiving protrusions at at least three locations, and a stopper is provided on either the mounting ring or the housing, and the other abuts against the stopper. A contact portion is provided, and the reflector is supported in at least three locations on the housing in a freely adjustable angle, two of the support locations are configured as adjustment mechanisms, and the other location is configured to be associated with each of the adjustment mechanisms. 1. A headlamp characterized in that the headlamp is configured to have a support mechanism having a prism as a point of action, so that the reflector can be slid and rotated approximately around the center of the prism via the mounting ring.