TWM523647U - Bicycle LED headlight - Google Patents

Description

LED bicycle headlight

This creation is about a kind of headlights, especially about an LED bicycle headlight.

Because of its high brightness, small size, and power saving, LED has been widely used as a lighting source for lamps. A bicycle light is one of the applications. Generally, the bicycle driver needs a light type with a wide distribution but a low illumination angle. The center brightness is about 10 Lux or more. Therefore, the comprehensive light distribution required for the bicycle headlights is bright, wide and flat.

The mirror surface of a typical bicycle light uses multiple curved surfaces. However, the number of reflective lenses of multiple curved surfaces is high, which makes the manual polishing of the molds require high technology and cost, and the manufacturing process is complicated, resulting in high production threshold, which is not conducive to the production and promotion of products and technologies.

As mentioned above, the creators of this creation have designed a kind of LED bicycle headlights after years of research, to improve the lack of existing technology, and to enhance the implementation and utilization of the industry.

In view of the above-mentioned problems, the purpose of the present invention is to provide an LED bicycle headlight which adopts a mirror surface composed of a single curved surface which is discarded due to technical prejudice, so as to solve the complicated process of the conventional bicycle lamp with multiple curved surfaces. The lack of high technology costs.

Based on the above objects, the present invention provides an LED bicycle headlight that includes a vehicle body and a light-emitting element. The lamp body has a light source positioning surface and a lower half reflection surface; the lower half reflection surface is connected to the light source positioning surface and extends obliquely downward from the light source positioning surface. The light-emitting element is disposed on the light source positioning surface corresponding to the lower semi-reflecting surface; the light-emitting element emits light toward the lower half-reflecting surface. The light emitted by the light-emitting element is reflected by the lower semi-reflecting surface of the lamp body, and the illumination distribution of the lamp is projected away from the body of the lamp; the illumination distribution of the lamp has a cut-off line.

Preferably, the lower semi-reflecting surface can be a free curved surface.

Preferably, the freeform surface can be a spherical surface, a paraboloid, a hyperboloid or an elliptical surface.

Preferably, the lower semi-reflecting surface can be smooth.

Preferably, the light source positioning surface can be a flat surface.

Preferably, the lamp body can project the light incident from the light-emitting element to the lower semi-reflecting surface obliquely upward with respect to the extending direction of the lower reflecting surface.

Preferably, the illuminance distribution of the vehicle lamp is axially symmetrically distributed along the optical axis direction.

Preferably, the vehicle illuminance distribution is non-axisymmetrically distributed along a major axis direction perpendicular to the optical axis direction.

Preferably, the illumination distribution of the vehicle lamp may include a light type with the largest central brightness, a wide illumination, and a flat shape.

Preferably, the light emitting element can be a light emitting diode.

According to the above description, the LED bicycle headlight of the present invention adopts a single smooth surface of a simple free-form surface to replace the use of the conventional multi-surface, thereby reducing the production cost and the complexity of the process. It can produce the illumination distribution of the lamp with clear cut-off line and meet the German K-Mark light distribution standard.

The embodiments of the LED bicycle headlights according to the present invention will be described below with reference to the related drawings. For ease of understanding, the same components in the following embodiments are denoted by the same reference numerals.

Please refer to FIG. 1 and FIG. 2, which is a schematic view of an LED bicycle headlight according to the present invention; and FIG. 2 is a side view of the LED bicycle headlight according to the present invention. As shown, the LED bicycle headlight includes a vehicle body 100 and a light-emitting element 200.

The lamp body 100 can be an integrally formed structure; the lamp body 100 has a light source positioning surface 110 and a lower half reflection surface 120. The light source positioning surface 110 can be a light transmitting mirror surface, so that the light 210 emitted by the light emitting element 200 passes through the light source positioning surface 110 to the lower half reflecting surface 120.

In detail, the light source positioning surface 110 may be the top surface of the lamp body 100, and the lower half reflection surface 120 may be the bottom surface of the lamp body 100. It should be noted that the lower semi-reflecting surface 120 is a single curved surface structure instead of a multi-surface surface; the lower semi-reflecting surface 120 is connected to one side of the light source positioning surface 110 of the lamp body 100, and the lower semi-reflecting surface 120 is from the light source positioning surface. The direction of the other side of the 110 extends obliquely downward.

On the other hand, the light-emitting element 200 may be a light-emitting diode, an incandescent light bulb or a gas discharge bulb, but a light-emitting diode is preferred. The light-emitting element 200 is disposed on the light source positioning surface 110 of the lamp body 100 corresponding to the lower semi-reflecting surface 120 of the lamp body 100. As shown in the embodiment, the light-emitting element 200 is disposed above the light source positioning surface 110. However, the light-emitting element 200 may be disposed under the light source positioning surface 110, that is, the light-emitting element 200 may be disposed under the light source positioning surface 110. The interior of the lamp body 100 is exemplified herein and is not limited thereto.

The number and position of the above-mentioned light-emitting elements 200 can be adjusted according to actual needs. That is, the distance of the projection of the light ray 210 is adjusted by changing the distance between the light-emitting element 200 and the lower semi-reflecting surface 120 inside the lamp body 100. For example, changing the distance between the light-emitting element 200 and the lower semi-reflecting surface 120 is such that the lower reflecting surface 120 can reflect the light 210 emitted by the light-emitting element 200 to a relatively close place, which is a low beam light. status.

In practice, the light-emitting element 200 can emit light 210 toward the lower semi-reflecting surface 120 of the lamp body 100; the intensity, color, and flicker frequency of the light 210 can be adjusted according to actual needs. Then, the light ray 210 emitted by the illuminating element 200 can be reflected by the lower semi-reflecting surface 120 of the lamp body 100, and a illuminance distribution of the illuminating light is projected in a direction away from the lamp body 100 (ie, in front of the lamp body 100); The illuminance distribution of the lamp has a clearly identifiable cut-off line.

Please refer to Fig. 2, which is a side view of the LED bicycle headlight according to the present invention. As shown, the LED bicycle headlight includes a vehicle body 100 and a light-emitting element 200. In the present embodiment, the components of the same component symbols are similar to the embodiments described above, and will not be further described herein.

The lower reflecting surface 120 of the lamp body 100 may be a free curved surface such as a spherical surface, a paraboloid, a hyperboloid or an elliptical surface, and the lower semi-reflecting surface 120 may be smooth. In addition, the light source positioning surface 110 of the lamp body 100 can be a flat surface, which is only illustrated by way of example and not limited thereto.

The lamp body 100 can project the light ray 210 incident on the lower semi-reflecting surface 120 from the light-emitting element 200 obliquely upward with respect to the extending direction of the lower reflecting surface 120. The degree of inclination of the light 210 reflected by the lower reflecting surface 120 of the lamp body 100 may depend on the curvature of the lower reflecting surface 120, that is, the lamp body 100 may be selected by using the lower reflecting surface 120 of different curvatures. The lamp body 100 projects a illuminance distribution of the lamp with a desired light distribution type.

Please refer to FIG. 3, which is a schematic diagram of an LED bicycle headlight according to the present invention. As shown, the vertical axis is a vertical angle and the horizontal axis is a horizontal angle.

The light pattern of the illuminance distribution of the lamp projected by the LED bicycle headlight of the present invention is axially symmetrically distributed along the optical axis direction, and is non-axisymmetrically distributed along the main axis direction perpendicular to the optical axis direction, that is, the illumination distribution of the vehicle lamp has A distribution of light distribution that is bilaterally symmetrical but asymmetric. In detail, the left and right light distribution of the illuminance distribution of the lamp is about 8 degrees, the upper distribution is 2 degrees, and the lower distribution is 9 degrees, and the illumination distribution of the lamp has the largest central brightness, wide illumination, and flat light type.

In order to meet the requirements of the German K-Mark light distribution specification, the illumination distribution of the lamp has a clearly identifiable cut-off line to clearly distinguish the dark area from the bright area. In this embodiment, the horizontal section of the cut-off line is located on the left side of the driving direction, and the inclined section of the cut-off line is located on the right side of the driving direction; wherein the horizontal section of the cut-off line makes the light not directly in the opposite side of the vehicle The driver's eyes prevent glare on the opposite side, while the slanted section of the cut-off line allows the LED bicycle headlights to illuminate the road away from the driver on the opposite side.

It should be understood that the position of the horizontal section and the inclined section can be adaptively set according to traffic regulations of different countries. Preferably, to achieve the best effect of preventing glare and illumination at the same time, the angle between the horizontal section and the inclined section is set to 15 degrees.

As shown in Table 1 below, compare the design values of the test points of the LED bicycle headlights (using the luminous components with luminous efficiency of 100 Lm/W) and the regulatory requirements, and analyze that each test point or test area is known. It can meet the specifications of German K-Mark bicycle headlights. It can be seen that the LED bicycle headlights of this creation adopt a single mirror design method with smooth free-form surface, which can fully meet the regulatory requirements.

Table 1: Comparison of design values of this patent with regulatory requirements         <TABLE border="1" borderColor="#000000" width="_0001"><TBODY><tr><td> Test Points</td><td> H </td><td> 1.5 D </td ><td> 5 D </td><td> Test Area≧3.4 D </td></tr><tr><td> 4L </td><td> V </td><td> 4R < /td><td> V </td><td> 4L </td><td> V </td><td> 4R </td></tr><tr><td> Regulatory Requirements (Lux) </td><td> ≧0.5 Emax </td><td> ≧10 </td><td> ≧0.5 Emax </td><td> ≧0.5 Emax </td><td> ≧1 </ Td><td> ≧1.5 </td><td> ≧1 </td><td> ≦2 </td></tr><tr><td> Design value of this patent</td><td> 25.9 </td><td> 33.3 </td><td> 30.2 </td><td> 29.7 </td><td> 10.5 </td><td> 15.9 </td><td> 12.8 < /td><td> 0.47 </td></tr></TBODY></TABLE>

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of this creation shall be included in the scope of the appended patent application.

100‧‧‧ headlight body
110‧‧‧Light source positioning surface
120‧‧‧ lower half reflection surface
200‧‧‧Lighting elements
210‧‧‧Light

Figure 1 is a schematic diagram of an LED bicycle headlight according to the present invention.

Figure 2 is a side view of an LED bicycle headlight according to the present invention.

Figure 3 is a schematic diagram showing the illumination distribution of the LED bicycle headlight according to the present invention.

100‧‧‧ headlight body

110‧‧‧Light source positioning surface

120‧‧‧ lower half reflection surface

200‧‧‧Lighting elements

Claims (10)

An LED bicycle headlight comprises: a vehicle lamp body having a light source positioning surface and a lower semi-reflecting surface, the lower semi-reflecting surface connecting the light source positioning surface and extending obliquely downward from the light source positioning surface; and a light-emitting element, Corresponding to the lower semi-reflecting surface disposed on the light source positioning surface, the light emitting element emits light toward the lower semi-reflecting surface; wherein the light emitted by the light emitting element is reflected by the lower reflecting surface of the lamp body, and away from the The direction of the head of the lamp body projects a illuminance distribution of the lamp, and the illuminance distribution of the lamp has a cut-off line. The LED bicycle headlight according to claim 1, wherein the lower semi-reflecting surface is a free curved surface. The LED bicycle headlight of claim 2, wherein the free curved surface is a spherical surface, a paraboloid, a hyperboloid or an elliptical surface. The LED bicycle headlight according to claim 1, wherein the lower semi-reflecting surface is smooth. The LED bicycle headlight according to claim 1, wherein the light source positioning surface is a flat surface. The LED bicycle headlight according to claim 1, wherein the lamp body projects the light incident from the light emitting element to the lower reflecting surface obliquely upward with respect to the extending direction of the lower reflecting surface. The LED bicycle headlight according to claim 1, wherein the illumination distribution of the vehicle is axially symmetric along the optical axis. The LED bicycle headlight according to claim 1, wherein the illumination distribution of the vehicle is non-axisymmetrically distributed along a direction perpendicular to a direction perpendicular to the optical axis. The LED bicycle headlight according to claim 1, wherein the illumination distribution of the vehicle includes a light having the largest central brightness, a wide illumination, and a flat shape. The LED bicycle headlight according to claim 1, wherein the light emitting element is a light emitting diode.