CN102486296A - Reflector of front fog lamp, front fog lamp and motor vehicle - Google Patents

Abstract

The invention provides a reflector of a front fog lamp, the front fog lamp and a motor vehicle. The reflector of the front fog lamp comprises a first stepped curved surface, a second stepped curved surface and a smooth curved surface, wherein the first stepped curved surface is divided based on a reference paraboloid and is formed by sequential arrangement of a plurality of strip-shaped curved surfaces along a first direction; the second stepped curved surface is divided based on a reference paraboloid and is formed by sequential arrangement of a plurality of strip-shaped curved surfaces along a second direction tilting toward the first direction; and the first stepped curved surface, the second stepped curved surface and the smooth curved surface are connected in sequence to form a bowl-shaped free-form curved surface. Compared with the traditional reflectors adopting multilayer curved surfaces which are finely divided, the reflector adopting the whole free-form curved surface avoids light losses caused by transition between excessive curved surfaces and has better convergence effect and improved illuminance.

Description

Front fog lamp reflector, front fog lamp and motor vehicle

[technical field]

The invention belongs to lighting field, relate in particular to a kind of front fog lamp reflector, front fog lamp and motor vehicle.

[background technology]

Traditional front fog lamp of automobile generally comprises reflector and the bulb of being located at the reflector center.Have two filaments in the bulb, be respectively applied for lower beam illumination and far lighting.Reflector adopts the design of multilayer free form surface, and its first half is mainly used in the dipped beam luminous intensity distribution, and distance light is then got by the reflection of entire emission device.But when lighting headlight high beam filament, its light light after the reflector reflects of upper part is too dispersed, and the free form surface of its each fritter of the first half gets meticulously, causes distance light to converge inadequately, and illumination does not reach the requirement of car light standard.

[summary of the invention]

Based on this, be necessary to provide a kind of convergence effect reflector preferably, use the front fog lamp of automobile of said reflector, and motor vehicle.

A kind of front fog lamp reflector comprises: by cut apart based on a benchmark parabola, arrange the first stepped curved surface form along the first direction order by a plurality of strip curved surfaces; Cut apart based on said benchmark parabola, arrange the second stepped curved surface that forms by a plurality of strip curved surfaces in proper order along the second direction that favours said first direction; And a smooth surface, the said first stepped curved surface, the said second stepped curved surface and said smooth surface link to each other successively and form a bowl-shape free form surface; Be the X axle with the light source optical axis, be that Y, Z axle are set up cartesian coordinate system, at the paraboloidal bus equation of the above benchmark of XOY plane be: y to pass said front fog lamp reflector bottom end face and orthogonal two rays ²=ax, wherein, 96≤a≤100; In the upright projection on YOZ plane, the angle X1 scope of the first stepped curved surface region is 160～170 degree, and the angle X2 scope of the second stepped curved surface region is 35～45 degree; The broken line V2 that the broken line V1 that the said first stepped curved surface links to each other with said smooth surface and the said first stepped curved surface link to each other with the said second stepped curved surface, both projections all are parallel to the Z axle; The broken line V3 that the said second stepped curved surface links to each other with said smooth surface extends through initial point O, and consistent with the gradient direction of the second stepped curved surface, and the acute angle that said gradient direction is become with said Z axle is 23～27 degree.

In a preferred embodiment, a=98.

In a preferred embodiment, in the upright projection on YOZ plane, the angle X3 of said smooth surface region is 154～156 degree.

In a preferred embodiment, X3 is 155 degree.

In a preferred embodiment, the paraboloidal focus of said benchmark overlaps with the luminous focus of dip filament as the H4 bulb of light source.

A kind of front fog lamp comprises front fog lamp reflector and the light source that matches with said front fog lamp reflector.Said light source is the H4 bulb, and said front fog lamp reflector comprises: cut apart based on a benchmark parabola, arrange the first stepped curved surface form along the first direction order by a plurality of strip curved surfaces; Cut apart based on said benchmark parabola, arrange the second stepped curved surface that forms by a plurality of strip curved surfaces in proper order along the second direction that favours said first direction; And a smooth surface, the said first stepped curved surface, the said second stepped curved surface and said smooth surface link to each other successively and form a bowl-shape free form surface; Be the X axle with the light source optical axis, be that Y, Z axle are set up cartesian coordinate system, at the paraboloidal bus equation of the above benchmark of XOY plane be: y to pass said front fog lamp reflector bottom end face and orthogonal two rays ²=ax, wherein, 96≤a≤100; In the upright projection on YOZ plane, the angle X1 scope of the first stepped curved surface region is 160～170 degree, and the angle X2 scope of the second stepped curved surface region is 35～45 degree; The broken line V2 that the broken line V1 that the said first stepped curved surface links to each other with said smooth surface and the said first stepped curved surface link to each other with the said second stepped curved surface, both projections all are parallel to the Z axle; The broken line V3 that the said second stepped curved surface links to each other with said smooth surface extends through initial point O, and consistent with the gradient direction of the second stepped curved surface, and the acute angle that said gradient direction is become with said Z axle is 23～27 degree.

A kind of motor vehicle, said motor vehicle has foregoing front fog lamp.

The front fog lamp reflector of above-mentioned front fog lamp comprises the first stepped curved surface, the second stepped curved surface; An and smooth surface that links to each other with the first stepped curved surface, the second stepped curved surface; Getting very thin multilayer curved design with Traditional use compares; Avoided the light loss that causes owing to too much curved surface and the transition between the curved surface, convergence effect is better, has improved illumination.

[description of drawings]

Fig. 1 is the schematic perspective view of the front fog lamp of automobile of an embodiment;

Fig. 2 is the front view of front fog lamp of automobile shown in Figure 1;

Fig. 3 is the cutaway view along III-III line among Fig. 1;

Fig. 4 and Fig. 5 are the test condition sketch map.

[specific embodiment]

To combine accompanying drawing and embodiment that front fog lamp of automobile, front fog lamp reflector and motor vehicle are done further to specify below.

See also Fig. 1, the front fog lamp of automobile 100 of an embodiment comprises front fog lamp reflector 10 and light source 20.Front fog lamp reflector 10 is roughly bowl-type, and light source 20 is located at the center of front fog lamp reflector 10.Light source 20 is based on halogen bulb of H4 type, and it has optical axis 21.

Please consult Fig. 2 and Fig. 3 simultaneously, front fog lamp reflector 10 has reflecting surface, it comprise cut apart based on a benchmark parabola, arrange the first stepped curved surface 11 that forms along first direction (like the Z-direction among Fig. 2) order by a plurality of strip curved surfaces; Cut apart based on said benchmark parabola, arrange the second stepped curved surface 12 that forms by a plurality of strip curved surfaces in proper order along the second direction that favours said first direction; And a smooth surface 13 that links to each other with first stepped curved surface 11, the second stepped curved surface 12, the three links to each other successively and forms a bowl-shape free form surface.

Be the X axle, be that Y, Z axle are set up cartesian coordinate system with light source optical axis 21, at paraboloidal bus 131 equations of the above benchmark of XOY plane be: y to pass front fog lamp reflector 10 bottom end face center O and orthogonal two rays ²=ax, wherein, 96≤a≤100; Preferred a=98.

Be formed with a plurality of curved surfaces 111 of the vertical stripe shape that is divided into the waveform cross section on the first stepped curved surface 11.In the upright projection on YOZ plane, the angle X1 scope of the first stepped curved surface, 11 regions is 160～170 degree.

Be formed with a plurality of curved surfaces 121 of the inclination striated that is divided into the waveform cross section on the second stepped curved surface 12.In the upright projection on YOZ plane, the angle X2 scope of the second stepped curved surface, 12 regions is 35～45 degree.The acute angle that the gradient direction of the second stepped curved surface 12 is become with the Z axle is 23～27 degree, that is to say that the angle that a plurality of strip curved surfaces are obliquely installed with respect to above-mentioned first direction (Z-direction among Fig. 2) in the second stepped curved surface 12 is 23～27 degree.

The angle X3 of smooth surface 13 region in the upright projection on YOZ plane is 154～156 degree, is preferably 155 degree.

The first stepped curved surface 11 forms broken line V1 with smooth surface 13 connecting places.The first stepped curved surface 11 and second stepped curved surface 12 connecting places form broken line V2.V1 and V2 all are parallel to the Z axle in the upright projection on YOZ plane.In other words, V1 and V2 along the inner surface of front fog lamp reflector 10 extend and with pass optical axis 21 and perpendicular to the plane parallel of front fog lamp reflector 10 bottom end faces.The second stepped curved surface 12 forms broken line V3 with smooth surface 13 connecting places.V3 extends through initial point O, and consistent with the gradient direction of the second stepped curved surface 12.

Light source 20 comprises dip filament 23 and the headlight high beam filament 25 adjacent with dip filament 23.During use, headlight high beam filament 25 is positioned at the paraboloidal along of benchmark.

The one monoblock smooth surface 13 and the Traditional use of the front fog lamp of automobile 100 of present embodiment got the design of very thin multilayer free form surface and compared, and avoided the light loss that causes owing to too much face piece and the transition between the face piece, improved illumination.

In addition, satisfying under the prerequisite of illumination, the size of above-mentioned front fog lamp reflector 10 can be littler than traditional reflector, and for example the opening diameter of front fog lamp reflector 10 can be contracted to 125mm, and the degree of depth can be reduced into 47mm.

The motor vehicle of one embodiment has above-mentioned front fog lamp 100.

Result of use for the front fog lamp 100 of the motor vehicle of verifying present embodiment; The applicant is according to carrying out actual measurement to the requirement of dipped beam, high beam luminous intensity distribution performance to it in " GB4599-2007 lamps for vehicle silk bulb front fog lamp ", and the brightness value in each test point, line segment or zone sees the following form.Experiment showed, that each illumination that need detect target all satisfies the requirement of GB 4599-2007.

(1) dipped beam:

Test point 1+2+3=0.26lx+0.26lx+0.22lx=0.74lx, qualified (require >=0.3lx);

Test point 4+5+6=0.35lx+0.55lx+0.45lx >=1.35lx is qualified;

0.7lx >=test point 7=0.43 >=0.1lx is qualified;

0.7lx >=test point 8=0.56 >=0.2lx is qualified.

(2) distance light:

Test point or zone	Standard-required brightness value (lx)	Illuminations actually measured value (lx)	Conclusion
				Emax	>;=48 and<=240	56.1	Qualified
HV	≥0.8Emax	52.3	Qualified
				The HV point is to 1125L and R	≥24	L≥30.1，R≥35.0	Qualified
The HV point is to 2250L and R	≥6	L≥10.6，R≥14.3	Qualified

Annotate: the position of each point is as shown in the figure in the table, sees also " GB 4599-2007 lamps for vehicle silk bulb front fog lamp " in detail P.5-6.

The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.

Claims (7)

1. a front fog lamp reflector is characterized in that, comprising:

Cut apart based on a benchmark parabola, arrange the first stepped curved surface form along the first direction order by a plurality of strip curved surfaces;

Cut apart based on said benchmark parabola, arrange the second stepped curved surface that forms by a plurality of strip curved surfaces in proper order along the second direction that favours said first direction;

And a smooth surface, the said first stepped curved surface, the said second stepped curved surface and said smooth surface link to each other successively and form a bowl-shape free form surface;

Be the X axle with the light source optical axis, be that Y, Z axle are set up cartesian coordinate system, at the paraboloidal bus equation of the above benchmark of XOY plane be: y to pass said front fog lamp reflector bottom end face and orthogonal two rays ²=ax, wherein, 96≤a≤100;

In the upright projection on YOZ plane, the angle X1 scope of the first stepped curved surface region is 160～170 degree, and the angle X2 scope of the second stepped curved surface region is 35～45 degree; The broken line V2 that the broken line V1 that the said first stepped curved surface links to each other with said smooth surface and the said first stepped curved surface link to each other with the said second stepped curved surface, both projections all are parallel to the Z axle; The broken line V3 that the said second stepped curved surface links to each other with said smooth surface extends through initial point O, and consistent with the gradient direction of the second stepped curved surface, and the acute angle that said gradient direction is become with said Z axle is 23～27 degree.

2. front fog lamp reflector as claimed in claim 1 is characterized in that: a=98.

3. front fog lamp reflector as claimed in claim 1 is characterized in that: in the upright projection on YOZ plane, the angle X3 of said smooth surface region is 154～156 degree.

4. front fog lamp reflector as claimed in claim 3 is characterized in that: X3 is 155 degree.

5. front fog lamp reflector as claimed in claim 1 is characterized in that: the paraboloidal focus of said benchmark overlaps with the luminous focus of headlight high beam filament as the H4 bulb of light source.

6. a front fog lamp comprises that the front fog lamp reflector reaches the light source that matches with said front fog lamp reflector, it is characterized in that said light source is the H4 bulb, and said front fog lamp reflector comprises:

Cut apart based on a benchmark parabola, arrange the first stepped curved surface form along the first direction order by a plurality of strip curved surfaces;

Cut apart based on said benchmark parabola, arrange the second stepped curved surface that forms by a plurality of strip curved surfaces in proper order along the second direction that favours said first direction;

And a smooth surface, the said first stepped curved surface, the said second stepped curved surface and said smooth surface link to each other successively and form a bowl-shape free form surface;

Be the X axle with the light source optical axis, be that Y, Z axle are set up cartesian coordinate system to pass said front fog lamp reflector bottom end face and orthogonal two rays; Above-mentioned free form surface is parabolic based on a benchmark, at the paraboloidal bus equation of the above benchmark of XOY plane is: y ²=ax, wherein, 96≤a≤100;

In the upright projection on YOZ plane, the angle X1 scope of the first stepped curved surface region is 160～170 degree, and the angle X2 scope of the second stepped curved surface region is 35～45 degree; The broken line V2 that the broken line V1 that the said first stepped curved surface links to each other with said smooth surface and the said first stepped curved surface link to each other with the said second stepped curved surface, both projections all are parallel to the Z axle; The broken line V3 that the said second stepped curved surface links to each other with said smooth surface extends through initial point O, and consistent with the gradient direction of the second stepped curved surface, and the acute angle that said gradient direction is become with said Z axle is 23～27 degree.

7. a motor vehicle is characterized in that, said motor vehicle has front fog lamp as claimed in claim 6.

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