Lens unit for beacon and lamp assembly using same

Abstract

A lens unit for a beacon and a lamp assembly using same, according to the present invention, comprise: a housing; a base member mounted to the housing and having a light source mounted thereon; a heat dissipation means mounted to the base member and for dissipating heat generated from the light source; a focusing lens mounted to the housing and for focusing light irradiated from the light source; and a direct light aspherical reflective lens mounted to a sub-housing provided on top of the housing, and with which the adjustment of a focusing interval relative to the focusing lens is easy, due to a focusing adjustment unit.

Description

Lens unit for a light fixture and lamp assembly using the same

[0001] The present invention relates to a lamp assembly, and more specifically, to a lens unit for a light fixture that improves heat dissipation characteristics and visibility by using a lens that increases light focusing and reflection efficiency, and a lamp assembly using the same.

[0002] Typically, lighthouses are installed inside lighthouses or light buoys, which are primarily signs indicating navigational routes, for navigational purposes, or are housed in navigational route marking installations installed in areas close to airways for the operation of aircraft.

[0003] These beacons use high-intensity light sources, such as gas lamps, incandescent lamps, and light-emitting diode lamps (LEDs), to ensure that ships or aircraft operating at night have sufficient visibility, and are equipped with lenses and reflective members to focus and reflect the light emitted from these light sources.

[0004] Korean Patent No. 10-1788864 discloses a light fixture using a laser diode and a phosphor at a parabolic focus position, and Korean Patent No. 10-1803185 discloses a light fixture using an LED light source at a parabolic focus position.

[0005] The posted light fixture comprises a first reflector in the shape of a bowl whose entire inner surface of a parabolic surface is a reflective surface; a second reflector positioned below the first reflector and having a cone shape with a vertex as the focus of the parabola, and configured to have an angle of inclination of one of 35 to 55 degrees with respect to the direction of travel of reflected light to secure a maximum travel distance; and an LED light source coupled to the second reflector.

[0006] And, Korean Patent No. 10-2042916 discloses a lighting device for a beacon, US7572030 discloses a reflector, and Korean Patent Publication No. 2009-0076654 discloses an LED navigation light for a ship.

[0007] Conventional light fixtures as described above have a structure that focuses light irradiated from a light source and reflects it using a reflector, but have a problem in that the light focusing and reflection efficiency is low, resulting in relatively low visibility at a distance within the design range.

[0008] The light fixture published in Korean Patent No. 813121 uses a high-brightness LED as a light source, and has a structure in which a lens for the light source is formed in a ring-like, ring-like, or band-like shape to horizontally surround the high-brightness LED, and a convex lens part is formed by a curved surface on the outside.

[0009] U.S. Patent No. 7,246,917 discloses a lens for a light fixture.

[0010] The present invention is intended to solve the above-described problems, and provides a lens unit for a light fixture capable of minimizing light scattering when light irradiated from a light source is reflected in a radial direction, and forming a core region when reflected.

[0011] Another object of the present invention is to provide a lamp assembly using a lens unit for a light source, which can prevent deterioration by improving the heat dissipation efficiency characteristics of a light source, reduce aberration of a focusing lens that focuses light irradiated from a light source, and reduce scattering of light when reflecting the focused light in a radial direction, thereby improving visibility at close and long distances.

[0012] In order to achieve the above object, the lens unit for a light fixture of the present invention comprises a direct light aspherical reflective lens having a cone-shaped aspherical reflective lens body with a sharp central portion, a core reflective portion formed along an outer circumference from the central portion of the aspherical reflective lens body to reflect light, and a light-gathering reflective portion formed from the core reflective portion toward the edge of the aspherical reflective lens body to reflect incident light into a light irradiation area reflected by the core reflective portion.

[0013] It is characterized by having a condenser lens installed coaxially with the above-mentioned direct light aspherical reflective lens to condense light irradiated from a light source and irradiate it to the above-mentioned direct light aspherical reflective lens.

[0014] In the present invention, a sharp anti-reflection portion is formed in the center of the direct-light aspherical reflective lens so that light incident thereon is not regularly reflected. The direct-light aspherical reflective lens comprises a core reflective portion formed from the anti-reflection portion of the aspherical reflective lens body toward the edge of the aspherical reflective lens body, and a light-gathering reflective portion formed from the core reflective portion toward the edge of the aspherical reflective lens body to reflect the reflected light into the reflection area of ​​the core reflective portion and prevent scattering.

[0015] And the above light-gathering reflector is formed by continuously forming annular unit light-gathering reflectors, each having a reflection curvature for reflecting incident light, on the outer surface between the edge of the core reflector and the edge of the aspherical reflective lens body.

[0016] Meanwhile, the aspherical reflective lens body has a structure that is symmetrical vertically.

[0017] A lamp assembly for a lighting device to achieve the above purpose comprises a housing, a base substrate on which a light source is installed and installed in the housing, and a heat dissipation means installed on the base substrate to dissipate heat generated from the light source.

[0018] It includes a lens unit having a focusing lens installed in the housing to focus light irradiated from a light source, and a direct light aspherical reflective lens installed in a sub-housing provided on the upper side of the housing and having an easy-to-adjust spacing for focus with respect to the focusing lens by a focus adjustment unit.

[0019] In the present invention, a direct light aspheric reflective lens comprises an aspheric reflective lens body having a cone shape with a sharp center, a core reflective portion formed along an outer circumference from the center of the aspheric reflective lens body to reflect light, and a light-gathering reflective portion formed from the core reflective portion toward the edge of the aspheric reflective lens body to reflect incident light into a light irradiation area reflected by the core reflective portion.

[0020] The above heat dissipation means comprises a heat collecting plate installed at the bottom of a base substrate on which the light source is installed, a heat dissipation plate assembly positioned at the bottom of the heat collecting plate and having a plurality of heat dissipation plates stacked on top of it, and a heat pipe installed on the heat collecting plate and the heat dissipation plate assembly to transmit heat from the light source to the heat dissipation plate assembly.

[0021] The lens unit for a light fixture according to the present invention and the lamp assembly using the same focus the light irradiated from a light source and irradiate it in a vertical direction, reflect the light irradiated in the vertical direction in a radial direction, and prevent scattering of light reflected in the radial direction, thereby improving the concentration of light and further ensuring the visibility of the light source from a long distance.

[0022] In addition, the lamp assembly for a light fixture of the present invention can improve the heat dissipation characteristics of a light source, thereby preventing deterioration of the light source, i.e., the LED used as a light source.

[0023] Figure 1 is an exploded perspective view showing a lamp assembly for a light fixture according to the present invention.

[0024] Figure 2 is a cross-sectional view of a lamp assembly for a light fixture according to the present invention.

[0025] Figure 3 is a cross-sectional view of the direct light aspherical lens illustrated in Figure 1.

[0026] Figure 4 is a side view visually showing the trajectory of light irradiated from a light source in a lamp assembly for a light fixture according to the present invention.

[0027] FIG. 5 is a side view showing another embodiment of a direct light aspheric lens of a lamp assembly for a light fixture according to the present invention, visually showing the trajectory of light irradiated from a light source.

[0028] The present invention relates to a lens unit for a light fixture and a lamp assembly for a light fixture using the same, and one embodiment of the lamp assembly for a light fixture is shown in FIGS. 1 to 3.

[0029] Referring to the drawing, a lamp assembly (10) for a light fixture according to the present invention is installed in a housing (12) having an internal space (11) and has a base substrate (21) on which a light source (20) is installed. A heat dissipation means (30) is provided to dissipate heat generated from the light source (20) by being coupled to the base substrate (21).

[0030] And, the housing (12) in which the light source (20) is installed is equipped with a lens unit (50) that focuses the light irradiated from the light source (20) vertically upward and then reflects it in the radial direction.

[0031] The lamp assembly for a light fixture according to the present invention, configured as described above, will be described in more detail by component as follows.

[0032] It is preferable that the light source (20) installed on the above base substrate (21) uses an LED lamp, and this LED lamp (LED: (light emitting diode lamp) may include R, G, B LED elements for emitting single-color or multi-color light.

[0033] And the lens unit (50) is installed in the housing (12) and has a condenser lens (60) for condensing light emitted from a light source (20), and a direct light aspherical reflector lens (70) installed coaxially and vertically above the condenser lens (60) for radially reflecting the light condensed by the condenser lens (60).

[0034] The above-mentioned condenser lens (60) may be made of transparent polycarbonate (PC). The condenser lens (60) has a smooth surface (61) on the side facing the light source, and a convex aspherical surface (62) on the outer side corresponding thereto. That is, the aspherical surface (62) of the condenser lens (60) has a different radius of curvature from the edge of the condenser lens (60) toward the center, based on the smooth surface.

[0035] The curvature may become smaller from the vertical center (C) of the aspherical surface (62) of the condenser lens toward the edge (62) of the aspherical surface (62), and the curvature that becomes smaller from the center of the aspherical surface (62) toward the edge may be discontinuous.

[0036] To explain this in more detail, as illustrated in FIG. 3, the aspherical surface has a structure in which the radius of curvature gradually decreases from the center to the edge. This means that the aspherical surface (62) is formed along the circumferential direction, and has a structure in which annular unit aspherical focusing lens parts (65) having a light-gathering power with a predetermined curvature are continuously formed from the center to the edge. The curvature of each unit aspherical focusing lens part (65) increases spherical aberration the farther away it is from the center of the aspherical surface (62), so that the light is focused toward the center of the focusing lens (60), thereby allowing the light to enter the center of the direct light aspherical reflective lens (70).

[0037] In addition, by focusing the light irradiated from the light source (20) toward the central portion of the focusing lens (60), the focusing density can be increased to form a core light having a predetermined radius.

[0038] The above direct light aspherical reflective lens (70) reflects the light focused and irradiated from the above condenser lens (60), i.e., the light incident in the vertical direction, in the radial direction (the normal direction to the alignment axis of the condenser lens and the direct light aspherical reflective lens).

[0039] This direct light spherical reflector lens (70) is installed in a sub-housing (15) fixed to the upper part of a cylindrical glass cover (13) that is supported by a housing (12) and has an internal space that surrounds a condenser lens (60).

[0040] The above-described direct light aspheric reflective lens (70) is positioned coaxially with the central axis of the condenser lens (60). The direct light aspheric reflective lens (70) installed in the sub-housing (52) adjusts the focus with respect to the condenser lens (60) by a focus adjustment unit (80) installed in the sub-housing.

[0041] Meanwhile, the direct light aspheric reflective lens (70) includes a cone-type aspheric reflective lens body (71). The aspheric reflective lens body (71) has a sharp anti-reflective portion (73) formed in the center corresponding to the central axis (C) of the condenser lens (60), and has a light reflecting portion (75) for reflecting light focused and incident from the condenser lens (60) in the normal direction (hereinafter abbreviated as radial direction) with respect to the array axis of the condenser lens (60) and the direct light aspheric reflective lens (70), i.e., the vertical array central axis (C).

[0042] The above light reflecting portion (75) is provided with a core reflecting portion (76) formed from the non-reflecting portion (73) of the aspherical reflective lens body (71) toward the edge of the aspherical reflective lens body (71), and a light collecting reflecting portion (78) formed from the core reflecting portion (76) toward the edge of the aspherical reflective lens body (71) to reflect the reflected light into the reflection area of ​​the core reflecting portion (76) and prevent scattering.

[0043] The core reflector (76) formed on the outer surface of the above-mentioned non-reflective lens body (71) can be formed so that the curvature changes as it goes from the non-reflective portion (73) to the light-gathering reflector (78).

[0044] The core reflector (76) is formed along the circumferential direction on the outer surface of the aspherical reflective lens body (71) and has unit core reflectors (77) that can reflect the core light irradiated from the light collecting lens body (60). The unit core reflectors (77) are formed in a ring shape along the outer surface with the central axis (C) of the aspherical reflective lens body (71) as the center. Each of the unit core reflectors (77) has a different curvature from the non-reflective portion (73) toward the light collecting reflector (78) and can be formed continuously or discontinuously.

[0045] And the above light-gathering reflector (78) is for reflecting the light irradiated from the light-gathering lens (60) to the reflection area of ​​the core reflector (76), and has a structure in which annular unit light-gathering reflectors (not shown) each having a reflection curvature for reflecting the incident light are continuously formed on the outer surface between the edge of the core reflector (76) and the edge of the aspherical reflective lens body (71).

[0046] The reflection angle of the above unit light-gathering reflector, i.e., the reflection angle with respect to the central axis (C), is formed to be relatively larger than the reflection angle of the core reflector (76).

[0047] The light-gathering reflector (78) formed by the above-mentioned unit light-gathering reflectors has a large luminous intensity radius, so that the surface of the aspherical reflective lens body (71) and the core reflector (76) and the light-gathering reflector (78) form an S-curve from the non-reflective portion (71). That is, an S-curve is formed from the non-reflective portion (73) toward the edge of the aspherical reflective lens body (71).

[0048] As described above, a reflective film can be formed on the outer surface where the core reflector (76) and the unit light-gathering reflector formed by the unit core reflector (77) are continuously formed on the outer surface of the aspherical reflective lens body (71).

[0049] Meanwhile, in another embodiment of the lens unit for the light fixture, as shown in Fig. 4, the condenser lenses (60) are positioned at the upper and lower portions, and the aspherical reflective lenses (90) are positioned between them. The aspherical reflective lenses (90) have a structure in which cone-shaped light reflectors (95) are symmetrical upward and downward to reflect the light collected by the condenser lenses (60) positioned at the upper and lower portions. A light source for irradiating light is installed in each of the condenser lenses (60) positioned at the upper and lower portions.

[0050] The technical configuration of the core reflector and the light-gathering reflector forming the aspherical surface of the above-described condensing lens (60) and the light source reflector (95) may have substantially the same structure as the above-described embodiment.

[0051] Meanwhile, the focusing adjustment unit (80) is for adjusting the focus for reflection of the direct light aspheric reflective lens (70) by moving the direct light aspheric reflective lens (70) forward and backward with respect to the condenser lens (60). A focusing adjustment rod (81) installed on the rear of the direct light aspheric reflective lens (70) is installed in the guide section (16) of the sub-housing (15) so as to be able to move forward and backward.

[0052] At this time, a guide groove (82) is formed in the longitudinal direction of the focusing adjustment rod (81) in the guide part (16) to prevent rotation when the direct light aspherical reflector lens (70) is raised or lowered, and a guide protrusion (83) that is inserted into the guide groove (82) is formed in the guide part (16).

[0053] And, in the sub-housing (15), an adjustment knob (85) that is screw-connected to the forking adjustment rod (81) is rotatably installed. The focusing adjustment rod (81) and the focusing knob (85) may further be provided with a display unit (not shown) that displays the distance from the focusing lens (60) according to the rotation angle.

[0054] The above heat dissipation unit (30) is intended to prevent deterioration of the LED light source (20) by dissipating heat generated from a light source that irradiates high-brightness light, i.e., an LED light source (20). The heat dissipation unit (30) is provided with a heat collecting plate (31) that is in close contact with the base substrate (21) to dissipate heat, a heat dissipation cover (32) that is coupled with the housing (12), a heat dissipation plate assembly (34) in which plate-shaped heat dissipation plates (33) are laminated, and a plurality of heat pipes (35) for transferring heat generated from the heat collecting plates (31) to the heat dissipation plate assembly (34) are installed.

[0055] The heat receiving portion of each heat pipe (35) is installed on a heat collecting plate (31), and the heat dissipating portion of the heat pipe (35) is installed on a heat dissipating plate assembly (34). It is preferable that the heat dissipating portion of the heat pipe (35) penetrates each heat dissipating plate (33) to ensure smooth heat transfer.

[0056] In addition, a plurality of through holes may be formed in the heat sink assembly (34) and the heat sink cover to ensure smooth air circulation for heat transfer. The heat sink unit is not limited to the above-described embodiment, and any structure capable of smoothly dissipating heat generated from a light source may be used.

[0057] A lamp assembly using a lens unit for a lighthouse according to the present invention configured as described above is installed and used in a lighthouse or a light buoy.

[0058] As the lamp assembly (10) for the light source (20) is powered and emits light, the light emitted from the light source (20) is focused by the focusing lens (60) to form a core light having a circular cross-section and a high light focusing density.

[0059] The light focused in this way is irradiated by a direct light aspherical reflector lens (70) and then irradiated as focused light in the radial direction through a light reflector (75).

[0060] To explain this in detail, since an anti-reflective part (73) is formed in the center of the direct light condenser lens (70), even if core light is irradiated, it is not reflected toward the condenser lens (60), so that light loss can be reduced.

[0061] The focused light irradiated by the light reflecting portion (75), i.e., the core reflecting portion (76) of the above-described direct-light aspherical reflective lens (70), is reflected in a direction perpendicular to the central axis (C), thereby preventing light scattering. As illustrated in Fig. 4, the density of the reflected focused light can be increased.

[0062] And the light irradiated from the above-mentioned condenser lens (78) to the condenser reflector (78) is reflected within the reflection area of ​​the core reflector (76), and it is preferable that it does not exceed the light width (W) reflected by the core reflector at the set reflection distance.

[0063] Meanwhile, the direct light aspherical reflector lens (70) can adjust the distance from the condenser lens (60) using the adjustment knob (85) of the focusing adjustment unit (80), thereby maintaining the best focusing state for light reflection.

[0064] And, since the heat generated from the light source (20) can be transferred to the heat sink assembly (34) by the heat collector (31) and the heat pipe and released, the light source (20) can be prevented from being deteriorated by heat. In particular, since the heat sink means has a predetermined distance between the heat collector (31) and the heat sink assembly (34) and a hollow portion formed in the center of the heat sink assembly, convection is activated by the chimney effect, thereby maximizing the cooling effect of the heat sink assembly (34).

[0065] As described above, the lens unit for a light fixture according to the present invention and the lamp assembly using the same can form core light by focusing light irradiated from a light source using a focusing lens and reflect the focused light through the central reflector of a direct light aspherical lens, thereby improving the visibility of the light and increasing the visible distance of the light.

[0066] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

Claims

1. A direct light aspherical reflective lens having a cone-shaped aspherical reflective lens body with a sharp central portion, a core reflective portion formed along the outer circumference from the central portion of the aspherical reflective lens body to reflect light, and a light-gathering reflective portion formed from the core reflective portion toward the edge of the aspherical reflective lens body to reflect incident light into a light irradiation area reflected by the core reflective portion. A lens unit for a light fixture, characterized in that it comprises a condenser lens installed coaxially with the direct light aspherical reflector lens to condense light irradiated from a light source and irradiate it to the direct light aspherical reflector lens.

2. In paragraph 1, A lens unit for a light fixture, characterized in that a sharp non-reflective portion is formed to prevent light incident on the central portion of the above direct light aspherical reflective lens from being reflected.

3. In paragraph 1, The above light-gathering reflector is a lens unit for a light-emitting diode, characterized in that annular unit light-gathering reflectors, each having a reflective curvature for reflecting incident light, are continuously formed on the outer surface of the edge of the aspherical reflective lens body from the edge of the core reflector.

4. In paragraph 3, A lens unit for a light fixture, characterized in that the surface trajectories of the core reflector and the light-gathering reflector are formed in an S curve from the non-reflective portion toward the edge of the aspherical reflective lens body.

5. In paragraph 3, A lens unit for a light fixture, characterized in that the above-mentioned aspherical reflective lens has a structure in which a cone-shaped light reflecting portion is symmetrical upward and downward to reflect light collected by a collecting lens positioned at the upper and lower portions.

6. A housing, a base member installed in the housing and having a light source installed therein, and a heat dissipation means installed in the base member to dissipate heat generated from the light source, A lamp assembly for a light fixture, characterized in that it includes a lens unit having a focusing lens for focusing light irradiated from a light source and a direct light aspherical reflector lens installed in a sub-housing provided on the upper side of the housing and having an easy-to-adjust spacing for focusing with respect to the focusing lens by a focusing adjustment unit.

7. In paragraph 6, A lamp assembly for a light fixture characterized in that a sharp non-reflective portion is formed in the central portion of the above-mentioned non-spherical reflective lens so that light incident thereon is not reflected.

8. In paragraph 7, A lamp assembly for a light fixture, characterized in that the surface trajectories of the core reflector and the light-gathering reflector are formed in an S curve from the non-reflective portion toward the edge of the aspherical reflective lens body.

9. In paragraph 6, A lamp assembly for a light fixture, characterized in that the heat dissipation unit comprises a heat collecting plate installed at the bottom of a base frame on which the light source is installed, a heat dissipation plate assembly positioned at the bottom of the heat collecting plate and having a plurality of heat dissipation fins stacked thereon, and a heat pipe installed on the heat collecting plate and the heat dissipation plate assembly to transmit heat from the light source to the heat collecting plate toward the heat dissipation plate assembly.

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