Lighting apparatus

Abstract

The present invention relates to a lighting apparatus and includes: an LED unit which generates and emits predetermined light; a lighting body which is made of a thermally conductive material and has an installation space with an open front side to install the LED unit and has on the rear portion thereof a plurality of press-fitting portions which are integrally formed in the form of a pair of slot ribs long in the vertical direction; and a plurality of heat dissipation units which have formed therein a refrigerant flow space filled with a refrigerant therein and are press-fitted and installed in a press-fitting manner such that at least a portion of the refrigerant flow space is positioned inside the pair of slot ribs of the press-fitted portions. Accordingly, heat dissipation performance may be improved.

Description

lighting device

[0001] The present invention relates to a lighting apparatus, and more particularly, to a lighting apparatus capable of maximizing light distribution performance and heat dissipation performance by including a heat dissipation unit capable of effectively dissipating heat generated from an LED unit.

[0002] In diverse industries such as communications, electronics, and electrical engineering, related technologies are continuously being developed at an advanced level for application in more advanced industries. This advanced technological development requires high-power energy, and devices utilizing this energy inevitably face the problem of high heat generation. Consequently, the development of appropriate cooling systems is essential.

[0003] Heat dissipation systems are used in a wide range of industries, including air conditioners, mobile communications, data centers, aerospace mobility, electric vehicles, energy storage devices, displays, and lighting. These systems are a major source of power consumption, and power consumption is steadily increasing as industries develop.

[0004] In general, cooling devices are largely divided into active cooling devices and passive cooling devices. Active cooling devices mainly utilize forced convection by fans, and passive cooling devices can be classified as a technology that utilizes natural convection without fans.

[0005] Fig. 1 is a perspective view showing a heat dissipation system that utilizes the thermal conductivity of the material of a heat dissipation unit in the form of a heat sink fin as an example of a lighting device according to the prior art.

[0006] As shown in Fig. 1, it may include a lighting body (10), an LED unit (20) installed on the inside of the lighting body (10) to generate and irradiate a predetermined light, and a heat dissipation unit (11, 15) provided on the back surface of the lighting body (10) and provided in the form of a plurality of heat sink fins to dissipate heat generated from the LED unit (20) to the outside.

[0007] In particular, the lighting device (1) illustrated in Fig. 1 is a spot light that emits a narrow beam of radiation. This spot light can obtain a desired light distribution effect as the size of the light source becomes smaller, but it can be very disadvantageous in heat dissipation.

[0008] In addition, in a lighting device based on an LED unit (20) in which a plurality of LED elements are mounted, in order to secure the desired light distribution performance, the absolute temperature of the LED elements must be low, but there must be no temperature deviation (relative temperature) between the LED elements. If the temperature deviation between the LED elements is large, not only will the lifespan of the lighting device (1) be shortened, but the light distribution performance will also deteriorate.

[0009] The lighting device (1) according to the prior art illustrated in Fig. 1 is equipped with two types of heat dissipation units (11, 15) to minimize the temperature difference between LED elements of the LED unit (20).

[0010] That is, the heat dissipation unit (11, 15) includes an integral heat sink fin (11) formed integrally around the center of the back surface of a lighting body (10) in the shape of a square body with an approximately open front, and a detachable heat sink fin (15) detachably provided at the center of the back surface of the lighting body (10).

[0011] The reason for providing a separate detachable heat sink fin (15) on the back of the lighting body (10) in addition to the integrated heat sink fin (11) is to actively release the heat concentrated in the center portion in order to minimize the temperature difference between LED elements when dissipating the heat generated from the LED unit (20).

[0012] Meanwhile, in order to minimize the temperature difference between LED elements without having the separately removable heat sink fin (15) described above, it is possible to consider increasing the spacing between LED elements, but in this case, not only does it result in an increase in the product size, but the resulting increase in weight is unavoidable, which reduces the workability of installation on site and leads to the problem of damaging the freedom of design of the fixing bracket (30) for fixing it.

[0013]

[0014] The present invention has been devised to solve the above-mentioned technical problem, and its purpose is to provide a lighting device including a heat dissipation unit capable of effectively dissipating heat generated from an LED unit.

[0015] In addition, another object of the present invention is to provide a lighting device that can prevent an increase in product size by preventing temperature deviation between LED elements even when the spacing between a plurality of LED elements is dense.

[0016] In addition, another object of the present invention is to provide a lighting device capable of preventing a decrease in light distribution performance by densely arranging a plurality of LED elements constituting an LED unit.

[0017] The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0018] A lighting device according to one embodiment of the present invention comprises: an LED unit that generates and irradiates a predetermined light; a lighting body that is provided with an installation space that is open at the front so that the LED unit can be installed, and a plurality of press-fitting portions integrally formed in the shape of a pair of slot ribs extending vertically on a rear surface; and a plurality of heat dissipation units that are press-fitted so that a refrigerant flow space in which a refrigerant is filled is formed therein and at least a portion of the refrigerant flow space is positioned inside a pair of slot ribs of the press-fitting portion.

[0019] Here, the heat dissipation unit includes a one-side heat-conducting panel forming one side in the thickness direction of the refrigerant flow space and an other-side heat-conducting panel forming the other side in the thickness direction of the refrigerant flow space, and the refrigerant flow space can be formed by an operation of joining the one-side heat-conducting panel and the other-side heat-conducting panel, which are made of two metal panel members, along edge ends, or by bending a single metal panel member and then joining the one-side heat-conducting panel and the other-side heat-conducting panel, which are joined to each other, along edge ends.

[0020] In addition, the metal panel member forming the one-side heat-conducting panel and the other-side heat-conducting panel may be made of SUS (stainless steel) material.

[0021] In addition, the refrigerant flow space provided in the heat dissipation unit may include a first refrigerant flow path provided in an evaporation region in which liquid refrigerant among the refrigerants is stored and the stored liquid refrigerant is phase-changed into a gaseous state by heat supplied from the LED unit, and a plurality of second refrigerant flow paths formed in a direction of gravity or inclined with respect to the direction of gravity toward the first refrigerant flow path and guiding the liquid refrigerant that has been phase-changed from a gaseous state to a liquid state among the refrigerants to flow toward the first refrigerant flow path.

[0022] In addition, the refrigerant may be made of water that can change its phase from a liquid state to a gaseous state or from a gaseous state to a liquid state by the thermal conductivity of a heat-conducting panel on one side forming one side of the refrigerant flow space and a heat-conducting panel on the other side forming the other side of the refrigerant flow space.

[0023] In addition, when the first refrigerant passages of the plurality of heat dissipation units are installed by being pressed into the plurality of press-fitting portions arranged at a predetermined distance apart in the left and right directions on the rear surface of the lighting body, they can be arranged vertically up and down in the direction of gravity.

[0024] In addition, the plurality of second refrigerant passages may be defined to be partitioned from adjacent second refrigerant passages by a plurality of inclined guides protruding inwardly of the refrigerant flow space from a heat-conducting panel on one side forming one side of the refrigerant flow space and from a heat-conducting panel on the other side forming the other side of the refrigerant flow space.

[0025] In addition, at least one of the first and second refrigerant passages or the plurality of inclined guides may be connected to the first refrigerant passage at one end, and the end connected to the first refrigerant passage may be positioned relatively lower in the direction of gravity.

[0026] In addition, at least one of the first and second ends of the second refrigerant passage or the plurality of inclined guides may be connected to the first refrigerant passage, and the first and second ends may be connected in a straight line.

[0027] In addition, the refrigerant flow space may further include a plurality of third refrigerant flow paths defined as areas where the plurality of inclined guides are formed among the facing surfaces of the one-side heat-conducting panel and the other-side heat-conducting panel, and areas that are not joined but spaced apart from each other within the refrigerant flow space.

[0028] Additionally, the liquid refrigerant condensed in the condensation region other than the evaporation region may flow in the direction of gravity along the plurality of inclined guides defining the second refrigerant path, and the gaseous refrigerant evaporated in the evaporation region may flow as a gas along the angles between the plurality of inclined guides defining the third refrigerant path.

[0029] In addition, a plurality of strength reinforcing portions may be formed on the one-side heat-conducting panel and the other-side heat-conducting panel to protrude and contact each other within the refrigerant flow space to reinforce the strength of the one-side heat-conducting panel and the other-side heat-conducting panel.

[0030] In addition, the plurality of strength reinforcing members may be formed so that the leading edge surface protrudes further than the leading edge of the plurality of inclined guides into the refrigerant flow space at least.

[0031] In addition, the plurality of strength reinforcing members can be joined by a joining process including a laser welding method at a portion where they are in contact with each other within the refrigerant flow space, thereby forming the refrigerant flow space between the one-side heat-conducting panel and the other-side heat-conducting panel.

[0032] In addition, the heat dissipation unit may further include an absorber having a plurality of pores, which is disposed within the first refrigerant passage and absorbs liquid refrigerant within the refrigerant flow space and then evaporates it into gaseous refrigerant through heat transferred from the LED unit.

[0033] In addition, the heat dissipation unit may further include at least one auxiliary absorber that is arranged in a second refrigerant passage on an adjacent inclined guide among the plurality of inclined guides and captures and supplies liquid refrigerant to the absorber.

[0034] In addition, the lighting body may further include an angle adjustment unit that is placed at the lower end and adjusts the irradiation direction of the LED unit.

[0035] In addition, the angle adjustment unit may include a fixing bracket that fixes the lighting body to a predetermined position, a steering block that rotates left and right based on an axis perpendicular to the fixing bracket, and a tilting block that tilts and rotates back and forth via a left and right horizontal coupling axis that is horizontal to the steering block, and to which the lower end of the lighting body is connected.

[0036] In addition, the rotational coupling of the steering block to the fixed bracket can be achieved by means of a fixed panel coupled to the lower portion of the fixed bracket with the lower portion of the steering block inserted into an installation hole formed to penetrate the fixed bracket in the vertical direction.

[0037] In addition, the steering block is provided with a steering worm wheel gear having a plurality of worm wheel gear teeth formed on a portion of the outer surface thereof, and the fixed bracket is provided with a steering worm gear having worm gear teeth formed to mesh with the worm wheel gear teeth of the steering worm wheel gear so as to be rotatable, and the steering block can be steered and rotated left and right according to the rotation of the shaft of the steering worm gear.

[0038] In addition, the steering block is provided with a tilting worm wheel gear having a plurality of worm wheel gear teeth formed on a portion of the outer surface thereof, and the tilting block is provided with a tilting worm gear having worm gear teeth formed to mesh with the worm wheel gear teeth of the tilting worm wheel gear so as to be rotatable, and the tilting block can tilt and rotate in the forward and backward direction according to the axial rotation of the tilting worm gear.

[0039] In addition, the angle adjustment unit may include a housing base panel portion that fixes the lighting body requiring tilting or steering adjustment to a predetermined position, a steering base panel that is rotated left and right based on a steering axis that is vertical to the housing base panel portion, and a tilting bracket panel that is rotated back and forth by tilting based on a tilting axis that is horizontal to the steering base panel, and to which the lower end of the lighting body is connected.

[0040] In addition, the angle adjustment unit may include a tilting rotation panel portion that is fixed to the lighting body and is provided to tilt and rotate in the front and rear directions in conjunction with the lighting body, and a steering rotation panel portion that is rotatably connected to an installation portion where the lighting device is installed and provides an arbitrary left and right horizontal axis to the tilting rotation panel portion.

[0041]

[0042] According to one embodiment of the lighting device according to the present invention, the following various effects can be achieved.

[0043] First, the heat dissipation performance is improved by a heat dissipation unit equipped with a coolant flow space filled with a coolant capable of phase change, which can concentrate the density of the LED elements mounted among the LED units, thereby eliminating the need for adding a separate heat dissipation structure for concentrated heat dissipation in the central portion.

[0044] Second, it has the effect of reducing the overall size of the product as well as its weight.

[0045]

[0046] Figure 1 is a perspective view showing a heat dissipation system using the thermal conductivity of the material of the heat dissipation unit itself in the form of a heat sink fin, as an example of a lighting device according to the prior art.

[0047] FIG. 2a and FIG. 2b are front and rear perspective views showing a lighting device according to one embodiment of the present invention.

[0048] Figures 3a and 3b are exploded perspective views of Figures 2a and 2b, respectively, showing the heat dissipation unit separated from the lighting body.

[0049] Figures 4a and 4b are exploded perspective views of Figures 2a and 2b, respectively, showing a state in which the heat dissipation unit is coupled to the lighting body.

[0050] Fig. 5 is a cross-sectional view taken along line AA of Fig. 2a,

[0051] Figures 6a and 6b are front and rear perspective views showing the lighting body of the configuration of Figures 2a and 2b.

[0052] Figures 7a and 7b are exploded perspective views of Figures 6a and 6b, respectively.

[0053] Figure 8 is an exploded perspective view showing the installation of the heat dissipation unit on the back surface of the lighting body.

[0054] FIG. 9 is a perspective view showing a heat dissipation unit for dissipating heat in a lighting device according to one embodiment of the present invention.

[0055] Figure 10 is an exploded perspective view of Figure 9.

[0056] Fig. 11 is a perspective view showing the configuration of the heat dissipation unit of Fig. 9 with one side of the heat conduction panel removed.

[0057] Fig. 12 is a cross-sectional view taken along line BB of Fig. 9.

[0058] Fig. 13 is a perspective view showing an example of an implementation of an angle adjustment unit among the configurations of a lighting device according to one embodiment of the present invention.

[0059] Figure 14 is an exploded perspective view of Figure 13.

[0060] Figures 15a and 15b are partial perspective projections for explaining the operation of the angle adjustment unit by tilting rotation and steering rotation.

[0061] Fig. 16 is a perspective view showing a lighting device according to another embodiment of the present invention.

[0062] Figures 17a and 17b are front and rear exploded perspective views for explaining the finger guard panel assembly of the configuration of Figure 16.

[0063] Fig. 18 is a perspective view of the back surface of a lighting device according to one embodiment of the present invention, in which another implementation example of an angle adjustment unit is installed.

[0064] Figure 19 is an exploded perspective view of Figure 18,

[0065] Fig. 20 is a perspective view showing another implementation example of an angle adjustment unit among the configurations of a lighting device according to one embodiment of the present invention.

[0066] Figure 21 is an exploded perspective view of Figure 20,

[0067] Fig. 22 is a perspective view of the back surface of another embodiment of an angle adjustment unit installed in a lighting device according to one embodiment of the present invention.

[0068] Figure 23 is an exploded perspective view of Figure 22,

[0069] Fig. 24 is a perspective view showing another embodiment of an angle adjustment unit among the configurations of a lighting device according to one embodiment of the present invention.

[0070] Figure 25 is an exploded perspective view of Figure 24.

[0071]

[0072] <Explanation of symbols>

[0073] 100: Lighting device 110: Lighting body

[0074] 120: Translucent panel 130: Press-fit part

[0075] 150: LED unit 200: Thermal conductive panel body

[0076] 210: First refrigerant path 215: Slant guide

[0077] 220: Second refrigerant flow path 230: Third refrigerant flow path

[0078] 240: Multiple strength reinforcements 300: Absorber

[0079] 3011: Auxiliary absorber 500: Finger guard assembly

[0080] 600: Angle adjustment unit of an example implementation

[0081] 610: Fixed bracket 620: Steering block

[0082] 630: Tilting Block

[0083] 1600: Angle adjustment unit of another implementation

[0084] 2600: Another implementation of the angle adjustment unit

[0085]

[0086] Hereinafter, a lighting device according to embodiments of the present invention will be described in detail with reference to the attached drawings.

[0087] When assigning reference numerals to components in each drawing, it should be noted that identical components are assigned the same numerals whenever possible, even if they appear on different drawings. Furthermore, when describing embodiments of the present invention, if a detailed description of a related known configuration or function is deemed to hinder understanding of the embodiments of the present invention, the detailed description will be omitted.

[0088] In describing components of embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by these terms. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined in this application.

[0089]

[0090] FIGS. 2A and 2B are front and rear perspective views showing a lighting device according to one embodiment of the present invention, FIGS. 3A and 3B are exploded perspective views of FIGS. 2A and 2B, respectively, showing a state in which a heat dissipation unit is separated from a lighting body, FIGS. 4A and 4B are exploded perspective views of FIGS. 2A and 2B, respectively, showing a state in which a heat dissipation unit is coupled to a lighting body, FIG. 5 is a cross-sectional view taken along line AA of FIG. 2A, FIGS. 6A and 6B are front and rear perspective views showing a lighting body among the configurations of FIGS. 2A and 2B, and FIGS. 7A and 7B are exploded perspective views of FIGS. 6A and 6B, respectively.

[0091] A lighting device (1) according to one embodiment of the present invention includes, as referenced in FIGS. 2A to 6B, a lighting body (110) having a vertical cross-section shape of approximately a rectangle (or square), but having a very slim thickness in the front-back direction and an open front, and an LED unit (150) including an LED substrate (151) mounted on the inside of the lighting body (110) and having a plurality of LED elements (155) mounted thereon.

[0092] In the front part of the lighting body (110), an installation space (110S) for stacking and installing the LED unit (150) described above is provided in the form of a groove with the front side open, and in the back part of the lighting body (110), a plurality of press-fitting portions (130) for press-fitting and installing the heat dissipation unit (200) described later can be integrally formed.

[0093] In addition, a plurality of screw fastening holes (112h) for screw assembly of the light-emitting panel (120) described later may be formed at a distance from each other on the front edge of the lighting body (110).

[0094] Meanwhile, a lighting device (100) according to one embodiment of the present invention, as referenced in FIGS. 4A to 7B, is made of a transparent material (or a translucent material) that transmits light generated from an LED unit (150) forward, but may further include a light-transmitting panel (120) that shields the open front of the lighting body (110).

[0095] More specifically, the light-emitting panel (120) may include a light-emitting glass (121) provided in the form of a panel made of a transparent material (or a translucent material), as shown in FIGS. 7A and 7B, a fixing frame (123) that mediates screw assembly of the light-emitting glass (121) to the front end of the lighting body (110) using a plurality of fixing screws (127), and a waterproof gasket (125) that is interposed between the fixing frame (123) and the front end edge of the lighting body (110) and performs a waterproof function.

[0096] At the edge end of the fixed frame (123), a plurality of screw penetration holes (129h) may be formed at positions corresponding to a plurality of screw fastening holes (112h) formed at the front end of the lighting body (110) so that the above-described fixing screws (127) may pass through.

[0097] Here, the waterproof gasket (125) is made of rubber material, and when the fastening force of the fixing screw (127) is provided to the fixing frame (123), it is compressed and deformed, thereby preventing foreign substances including rain from entering the interior.

[0098] Meanwhile, a plurality of press-fitting portions (130) can be integrally formed on the back surface of the lighting body (110) as described above.

[0099] A plurality of press-fit portions (130) are provided as a portion where a plurality of heat dissipation units (200) described later are detachably installed, and are provided in the form of a pair of slot ribs (130a, 130b) whose ends protrude rearward by a predetermined length from the rear surface of the lighting body (110), and the heat dissipation unit (200) can be installed by being press-fitted so that a part thereof (e.g., a part of the refrigerant flow space (205) described later) is positioned within an installation groove (130h) formed between the pair of slot ribs (130a, 130b).

[0100] The heat dissipation unit (200) is a component corresponding to a core heat dissipation means of an electronic device, such as a lighting device (100) according to one embodiment of the present invention, which generates a lot of heat during operation and whose lifespan is determined by whether the heat is quickly dissipated to the outside. The most important design element is to design it so that no temperature deviation occurs between the LED elements (155) constituting the LED unit (150).

[0101] In particular, in the case of spot lighting equipped to emit a narrow beam, a layout design of a heat dissipation unit (200) to densely mount small-sized light sources (LED elements (155)) while minimizing temperature deviation is more and more urgently required.

[0102] A lighting device (100) according to one embodiment of the present invention may further include a plurality of heat dissipation units (200) that are press-fitted and installed in press-fit portions (130) formed on the rear surface of the lighting body (110), as shown in FIGS. 2A to 7B.

[0103] In addition, an angle adjustment unit (600) is coupled to the lower side of the lighting body (110), so that the irradiation angle of the lighting body (110) can be adjusted. The specific configuration and function of the angle adjustment unit (600) will be described in more detail later.

[0104] Meanwhile, a finger guard panel assembly (500) according to an embodiment may be further combined to the back surface of the lighting body (110) so as to cover all but the lower portion of the plurality of heat dissipation units (200) described above, but provided in the form of a grill so that external air (outside air) can be ventilated for heat exchange with the heat dissipation units (200).

[0105] The finger guard panel assembly (500) may include, as referenced in FIGS. 3A and 3B, a left finger guard panel (500L) covering the left side of a plurality of heat dissipation units (200), a right finger guard panel (500R) covering the right side of a plurality of heat dissipation units (200), a rear finger guard panel (500P) connected to the rear ends of the left finger guard panel (500L) and the right finger guard panel (500R) and covering the rear side of the plurality of heat dissipation units (200), and an upper finger guard panel (500T) covering the upper side of the plurality of heat dissipation units (200).

[0106] In addition, the finger guard panel assembly (500) may further include a lower horizontal support bar (500DB) that is connected to and supported by the lower portions of the left finger guard panel (500L), the right finger guard panel (500R), and the rear finger guard panel (500P), and an upper horizontal support bar (500UB) that is connected to and supported by the upper portions of the left finger guard panel (500L), the right finger guard panel (500R), and the rear finger guard panel (500P).

[0107] Here, each finger guard panel (500L, 500R, 500P, 500T) may be screw-assembled at the ends that are in contact with each other using a plurality of fixing screws (503), or may be screw-assembled at the ends that are in contact with each other using a plurality of fixing screws (not indicated in the drawing symbol) via a lower horizontal support bar (500DB) or an upper horizontal support bar (500UB).

[0108] Meanwhile, as shown in Fig. 5, a lower horizontal support bar (500DB) has a mounting groove (505) formed that slopes downward from the front to the rear, and an air vent tube (270) of the heat dissipation unit (200) described later can be received in the mounting groove (505) to be protected from the outside.

[0109] Each finger guard panel (500L, 500R, 500P, 500T) of the finger guard panel assembly (500) according to this implementation example can be provided in the form of a panel having a number of ventilation holes (501) formed in a size that facilitates the inflow and exhaust of external air to and from the heat dissipation unit (200) that is the object of protection inside, while preventing access of the skin, including the fingers of an external worker.

[0110] However, each finger guard panel (500L, 500R, 500P, 500T), which is a main component of the finger guard panel assembly (500), is not necessarily provided in the form of a panel, and some components may be replaced with components such as a support pipe (510) within the limit of maintaining the skeleton, as in the finger guard panel assembly (500-1) according to another implementation example described later. This will be described in more detail later.

[0111] FIG. 8 is an exploded perspective view showing the installation of a heat dissipation unit on the back surface of a lighting body, FIG. 9 is a perspective view showing a heat dissipation unit for dissipating heat in a lighting device according to one embodiment of the present invention, FIG. 10 is an exploded perspective view of FIG. 9, FIG. 11 is a perspective view showing the heat dissipation unit of FIG. 9 with one side heat-conducting panel removed, and FIG. 12 is a cross-sectional view taken along line BB of FIG. 9.

[0112] As shown in FIG. 8, the heat dissipation unit (200) can be arranged in a vertical straight line (vertical) direction on the back surface of the lighting body (110), and a plurality of units can be arranged at a predetermined distance apart from each other in the left and right directions of the lighting body (110).

[0113] In order to install a plurality of heat dissipation units (200) like this, the press-fitting portions (130) provided on the back surface of the lighting body (110) are also arranged in a long vertical straight (vertical) direction, and each press-fitting portion (130) can also be arranged in parallel with a predetermined distance apart in the left and right directions.

[0114] According to the press-fit portion (130) having such a configuration, the upward airflow generated by the heat dissipation unit (200) on the back surface of the lighting body (110) has the advantage of a heat dissipation design in which the flow resistance is minimized in the direct upward direction.

[0115] Meanwhile, the heat dissipation unit (200) can form a refrigerant flow space (205) filled with refrigerant therein, as shown in FIGS. 8 to 12.

[0116] The heat dissipation unit (200) may include a one-side heat-conducting panel (200-1) forming one side in the thickness direction of the refrigerant flow space (205), and an other-side heat-conducting panel (200-2) forming the other side in the thickness direction of the refrigerant flow space (205), as referenced in FIGS. 9 to 12.

[0117] Here, the refrigerant flow space (205) can be formed by joining one side heat-conducting panel (200-1) and the other side heat-conducting panel (200-2) made of two metal panel members along the edge ends, or by bending a single metal panel member and then joining the one side heat-conducting panel (200-1) and the other side heat-conducting panel (200-2) along the edge ends excluding the bending portion where they are joined to each other.

[0118] Meanwhile, the refrigerant flow space (205), as shown in FIGS. 9 to 12, may include a first refrigerant passage (210) formed vertically and elongated in the vertical direction, which corresponds to an evaporation region where liquid refrigerant is stored (retained) among refrigerants and the stored (retained) liquid refrigerant is phase-changed (evaporated) into a gaseous state by heat supplied from the LED unit (150), and a second refrigerant passage (220) which is a flow path of the liquid refrigerant formed in a condensation region other than the evaporation region, but which is formed to be inclined in a rearward diagonal direction so as to be positioned higher in the direction of gravity than the aforementioned end while communicating with the first refrigerant passage (210), so that the liquid refrigerant that has been phase-changed from a gaseous state to be condensed in the condensation region flows toward the first refrigerant passage (210).

[0119] Hereinafter, a region positioned close to the LED unit (150) where the liquid refrigerant changes phase into a gaseous refrigerant by heat supplied from the LED unit (150) can be defined as the above-described 'evaporation region', and the entire refrigerant flow space (205) excluding the evaporation region can be defined as the above-described 'condensation region' where the gaseous refrigerant changes phase into a liquid refrigerant. The first refrigerant passage (210) can be positioned in a region corresponding to the evaporation region, and the second refrigerant passage (220) can be positioned in a region corresponding to the condensation region.

[0120] In addition, the end portion where the first refrigerant path (210) is positioned as an evaporation region is defined as a 'pressure end portion (201)' in that it is installed in the press-in portion (130) provided on the back surface of the lighting body (110) described above, and the remaining edge end portion excluding the press-in portion (201) can be defined as a 'heat dissipation plate portion (203)' in that it performs heat dissipation through actual heat exchange with the outside air.

[0121] In particular, the first refrigerant passage (210) may be a location where the liquid refrigerant is filled with a distance corresponding to the thickness of the metal panel member material relative to the press-fit portion (130) approaching the LED unit (150).

[0122] In this case, the first refrigerant passage (210) is a portion where the liquid refrigerant filled in the refrigerant flow space (205) is stored and retained, and can be arranged vertically up and down in the direction of gravity. Therefore, the liquid refrigerant stored in the first refrigerant passage (210) can have its water surface positioned relatively lower with respect to the direction of gravity, taking into account the volume that increases when the liquid refrigerant changes into a gaseous refrigerant.

[0123] In addition, the 'separation distance according to material thickness' may mean the distance between the first refrigerant passage (210) and the LED unit (150) or the press-fit portion (130).

[0124] Meanwhile, the second refrigerant flow path (220) may be defined in shape by a plurality of inclined guides (215) formed to protrude toward the refrigerant flow space (205) so as to prevent the substantially condensed liquid refrigerant from falling directly in the direction of gravity and to guide the inclined flow toward the first refrigerant flow path (210) by the properties of the surface tension of the liquid.

[0125] More specifically, the second refrigerant passage (220) provides a flow path that allows a uniform amount of liquid refrigerant to flow down and be supplied toward the first refrigerant passage (210) when the gaseous refrigerant (gaseous refrigerant) condenses into a liquid refrigerant (liquid refrigerant) through a heat exchange process with the outside air in the condensation region, thereby gradually increasing in volume at a position within the refrigerant flow space (205) where condensation takes place and flowing down in the direction of gravity.

[0126] In particular, the second refrigerant flow path (220) can be defined between a plurality of inclined guides (215), as described later, and when the liquid refrigerant that has been condensed in the condensation region flows toward the first refrigerant flow path (210), the dispersion flow can be suppressed toward the second refrigerant flow path (220) adjacent to the second refrigerant flow path (220), which is a magnetic flow path, due to surface tension.

[0127] That is, since the plurality of inclined guides (215) have a narrower flow space than the second refrigerant passage (220), as described later, surface tension acts to suppress the flow toward the adjacent second refrigerant passage (220).

[0128] In this way, when the dispersion flow of the condensed liquid refrigerant is suppressed by the plurality of inclined guides (215) and the second refrigerant passage (220), the liquid refrigerant can be minimized from falling directly downward in the direction of gravity, and the condensed liquid refrigerant can be supplied in a uniform amount toward the first refrigerant passage (210) without being biased in the condensation region by each lower end connected at a uniform interval to the first refrigerant passage (210).

[0129] In addition, a plurality of second refrigerant passages (220) can be defined between a plurality of inclined guides (215) that protrude into the refrigerant flow space (205) from the mutually facing surfaces of one side heat-conducting panel (200-1) and the other side heat-conducting panel (200-2).

[0130] Here, a plurality of inclined guides (215) defining the second refrigerant flow path (220) may be provided in a form that protrudes toward the refrigerant flow space (205) from each inner surface of one side heat-conducting panel (200-1) and the other side heat-conducting panel (200-2), as referenced in FIGS. 9 and 12.

[0131] The plurality of inclined guides (215) may be provided in a straight line shape that is inclined downward in the direction of gravity toward the first refrigerant passage (210). Accordingly, the liquid refrigerant condensed on the side of the heat sink (203) can naturally coagulate and then flow down between the plurality of downwardly inclined inclined guides (215) toward the first refrigerant passage (210), thereby playing a role in increasing the circulation speed of the liquid refrigerant.

[0132] Here, a plurality of second refrigerant passages (220) or a plurality of inclined guides (215) can be arranged so that adjacent second refrigerant passages (220) or inclined guides (215) are arranged in parallel to each other. In general, the flow of the condensed liquid refrigerant can be distributed through the second refrigerant passages (220) or inclined guides (215) that are arranged in parallel and densely and uniformly in a wide condensation area having a larger area than the evaporation area limited to the first refrigerant passage (210), thereby providing the advantage of heat dissipation throughout the entire condensation area with uniform heat dissipation performance.

[0133] In addition, a plurality of inclined guides (215) may be formed on each of the one-side heat-conducting panel (200-1) and the other-side heat-conducting panel (200-2), but may be formed in a form in which each tip portion protruding toward the refrigerant flow space (205) is not joined but is spaced apart from each other within the refrigerant flow space (205).

[0134] In this way, the second refrigerant passage (220) preferably has a size in the thickness direction that allows the flow to be formed naturally in the direction of gravity without being stopped by surface tension, which is an inherent characteristic of the liquid, in that it performs the function of inducing the flow of the liquid refrigerant in the direction of gravity. In addition, the second refrigerant passage (220) can be formed so that, after the liquid refrigerant has coagulated to a predetermined size or more, the dispersion flow due to surface tension or gravity is suppressed toward the adjacent second refrigerant passage (220).

[0135] In addition, at least one of the first and second refrigerant channels (220) or the second and second slant guides (215) is connected to the first refrigerant channel (210) formed in the evaporation region or the evaporation region at one end and the other end, and the end connected to the first refrigerant channel (210) formed in the evaporation region or the evaporation region (i.e., one of the first and second ends) is positioned lower in the direction of gravity than the other end of the first and second ends.

[0136] Therefore, when at least one of the first and second ends of the plurality of second refrigerant passages (220) is defined as 'first end', the first end has the same meaning as the 'lower end' located at the lower side with respect to the direction of gravity, and conversely, when the other of the first and second ends of the plurality of second refrigerant passages (220) is defined as the 'other end', the other end can have the same meaning as the 'upper end' located at the upper side with respect to the direction of gravity.

[0137] Furthermore, as described above, a plurality of second refrigerant passages (220) or a plurality of inclined guides (215) may be formed such that at least one of one end and the other end is connected to the first refrigerant passage (210), and the one end and the other end are connected in a straight line.

[0138] According to the straight shape of the plurality of second refrigerant passages (220), it can be seen that the straight shape of the second refrigerant passages (220) is an optimal shape that can minimize the distance between one end of the first refrigerant passage (210) that is located closest to the heating elements (140) and receives heat, and the other end that is the outermost end of the condensation area where condensation actively occurs through heat exchange with the outside air. In addition, the straight shape of the second refrigerant passages (220) itself can also minimize the overlapping length (flow resistance length) of the flow paths of the liquid refrigerant and the gaseous refrigerant.

[0139] That is, the heat dissipation unit (200) is configured so that the first refrigerant passage (210) in the portion corresponding to the press-in end (201) among the refrigerant flow spaces (205) formed inside the one-side heat-conducting panel (200-1) and the other-side heat-conducting panel (200-2) is positioned close to the LED unit (150) or the press-in portion (130), and a straight structure and a gas-liquid flow separation structure are applied so that gas-liquid circulation from the first refrigerant passage (210) (i.e., one end in the width direction) to the outer end (i.e., the other end in the width direction) which is the end of the condensation region is smoothly performed without significant flow resistance.

[0140] In addition, the second refrigerant passage (220) is formed so that a plurality of them do not branch from the other end in the width direction toward the first refrigerant passage (210) located relatively lower in the direction of gravity, in order to induce a liquid flow in the refrigerant flow space of the liquid refrigerant that has undergone a phase change from the gaseous refrigerant.

[0141] Meanwhile, the plurality of inclined guides (215) may define a second refrigerant flow path (220) between each inclined guide (215) as a flow path for inducing the flow of liquid refrigerant in the direction of gravity, as described above, and may also perform the function of defining a third refrigerant flow path (230) described later, which corresponds to a spaced portion in the thickness direction.

[0142] In this case, it is preferable that the plurality of inclined guides (215) are formed in a pattern inclined with respect to the first refrigerant passage (210) so as to form a flow path through which the liquid refrigerant (liquid refrigerant) flows, assuming that the first refrigerant passage (210) is positioned relatively lower in the direction of gravity due to tilting adjustment of the entire lighting body (110).

[0143] Here, the second refrigerant passage (220) defined as the adjacent interspace between a plurality of inclined guides (215) may be a refrigerant passage extending upwardly inclined from the first refrigerant passage (210) toward the width-wise end portions of one side heat-conducting panel (200-1) and the other side heat-conducting panel (200-2). This is to allow the liquid refrigerant liquefied on the heat-dissipating plate (203) side to easily move by its own weight toward the first refrigerant passage (210) equipped with the absorber (300).

[0144] Meanwhile, in the areas corresponding to the condensation areas of one side heat-conducting panel (200-1) and the other side heat-conducting panel (200-2), a plurality of strength reinforcing members (240) can be formed symmetrically to protrude into the refrigerant flow space (205).

[0145] A plurality of strength reinforcing members (240) can serve to reinforce the strength of the heat dissipation unit (200) as a whole by joining the areas where they come into contact with each other inside the refrigerant flow space (205) through a joining process using various joining methods, such as a laser welding method, when one side heat-conducting panel (200-1) and the other side heat-conducting panel (200-1) are joined to each other by bending or joining methods.

[0146] In addition, the plurality of strength reinforcing members (240) can also serve to facilitate active condensation by providing a larger interference surface area for the vaporized refrigerant to collide with for heat dissipation in the condensation region. That is, the plurality of strength reinforcing members (240) further increase the contact surface area with the vaporized refrigerant flowing freely through the third refrigerant passage (230) described below, thereby bringing about the effect of enabling refrigerant condensation to occur in a shorter period of time.

[0147] In addition, the heat dissipation unit (200) may further include a third refrigerant flow path (230) that acts as a flow path for gaseous refrigerant other than liquid refrigerant flowing mainly along a plurality of inclined guides (215), as referenced in FIGS. 9 to 12.

[0148] Here, referring to FIG. 12, the second refrigerant flow path (220) is defined as being formed between each of a plurality of adjacent inclined guides (215) formed in each of the one-side heat-conducting panel (200-1) and the other-side heat-conducting panel (200-2), except in the thickness direction of the refrigerant flow space (205), whereas the third refrigerant flow path (230) can be defined as the space between the inclined guide (215) formed in the one-side heat-conducting panel (200-1) and the inclined guide (215) formed in the other-side heat-conducting panel (200-2), in the thickness direction of the refrigerant flow space (205).

[0149] However, it should be noted that the exclusion of the thickness direction when defining the second refrigerant path (220) means that the direction that serves as the standard for the definition is not the thickness direction, and should not be interpreted as excluding the volume occupied by the thickness direction as the corresponding volume and space.

[0150] More specifically, the third refrigerant passage (230) is formed so that the inclined guide (215) protrudes further into the refrigerant flow space (205) than the second refrigerant passage (220), and thus the thickness of the refrigerant flow space (205) can be set to an area smaller than that of the second refrigerant passage (220). That is, the third refrigerant passage (230) can be defined as an area smaller in thickness than the second refrigerant passage (220) by a plurality of inclined guides (215).

[0151] In addition, the third refrigerant flow path (230) can be defined as a portion where a plurality of inclined guides (215) are formed on the facing surfaces of one side of the heat-conducting panel (200-1) and the other side of the heat-conducting panel body (200-2) and is not joined but spaced apart from each other within the refrigerant flow space (205).

[0152] The third refrigerant passage (230) can serve to provide a gas passage for the refrigerant filled in the refrigerant flow space (205) to easily diffuse and flow throughout the entire heat sink section (203) after the refrigerant has been phase-changed into a gaseous refrigerant in the evaporation region, which is the first refrigerant passage (210). The gaseous refrigerant evaporated in the first refrigerant passage (210), which is the evaporation region, moves toward the heat sink section (203) and can be smoothly and evenly distributed through the third refrigerant passage (230) to perform heat dissipation and be condensed.

[0153] For example, when the liquid refrigerant flows naturally through the space between the inclined guides (215) adjacent to the second refrigerant passage (220), the gaseous refrigerant actively flows through the third refrigerant passage (230), which is a space not occupied by the liquid refrigerant.

[0154] However, this does not mean that the liquid refrigerant is completely separated from the gaseous refrigerant and is not occupied through the third refrigerant passage (230), but it is preferable to understand that the gaseous refrigerant flows more actively through the third refrigerant passage (230).

[0155] That is, the phase change of the refrigerant is not a complete separation of the liquid refrigerant and the gaseous refrigerant, so it is difficult to define it precisely. However, in general, the second refrigerant passage (220) may be a path through which the liquid refrigerant mainly flows, since the size in the thickness direction is relatively large, and the third refrigerant passage (230) may be a path through which the gaseous refrigerant mainly flows.

[0156] More specifically, since the gaseous refrigerant is more active than the liquid refrigerant, the third refrigerant passage (230) having a relatively small size in the thickness direction can become the main flow path, and the liquid refrigerant can become the main flow path through the second refrigerant passage (220) having a relatively larger size in the thickness direction than the third refrigerant passage (230) considering its own surface tension.

[0157] Meanwhile, the third refrigerant passage (230) may be defined as a refrigerant passage connecting the space between the second refrigerant passages (220) that are spaced parallel to each other.

[0158] For example, the second refrigerant passage (220) may be formed to protrude from the area where the refrigerant flow space (205) is formed in the one-side heat-conducting panel (200-1) and the other-side heat-conducting panel (200-2), but may be partitioned by the third refrigerant passage (230) formed so as not to touch each other in the refrigerant flow space (205). Of course, it should be noted that the meaning of 'compartment' here does not mean a complete physical and spatial partition, but rather means the shape and position distinction of the second refrigerant passage (220) and the third refrigerant passage (230).

[0159] In a lighting device (100) according to one embodiment of the present invention having such a configuration, the heat dissipation unit (200) allows the liquid refrigerant condensed in a condensation area other than an evaporation area to flow in the direction of gravity along a plurality of inclined guides (215) defining a second refrigerant path (220), and the gaseous refrigerant evaporated in the evaporation area to flow as a gas along the gaps between the plurality of inclined guides (215) defining a third refrigerant path (230).

[0160] Meanwhile, in the evaporation area corresponding to the first refrigerant passage (210), an absorber (300) may be further installed to promote active vaporization of the absorbed liquid refrigerant by heat provided from the LED unit (150) after absorbing the liquid refrigerant.

[0161] That is, the absorber (300) is placed on the first refrigerant passage (210) positioned close to the LED unit (150) or the press-fit portion (130) which is the heat dissipation target, and can perform the function of raising at least the liquid refrigerant among the refrigerants upwards by capillary force or absorption force above the absorption point.

[0162] To this end, the absorbent (300) may be provided with a fiber material such as a nonwoven fabric having a large number of pores formed therein, and it is preferable that the absorbent (300) be provided with a material capable of dispersing and moving liquid refrigerant by capillary action (or self-absorption) while going against gravity in the vertical direction (i.e., in the direction opposite to gravity) at least at a predetermined height when placed on the first refrigerant passage (210) formed long in the vertical direction.

[0163] More specifically, the absorbent (300) may include any one of a nonwoven fabric formed by forming a plurality of pores (a type of wick structure) and a nonwoven fabric supported by a metal wire or a metal braid, and any one of a metal sintered body formed by sintering a metal powder.

[0164] The metal material here includes a copper material having excellent thermal conductivity, and the non-woven fabric can be supported by a thin metal wire of the copper material or a copper wire braided body in which the metal wire is braided.

[0165] That is, the absorbent (300) may be adopted as a non-woven fabric made of a fiber material itself. In this case, since the non-woven fabric material itself is a very flexible material and, when liquid refrigerant is absorbed, it may be difficult to maintain its shape in the vertical direction due to the weight of the absorbed liquid refrigerant, the non-woven fabric may be provided to be supported by a braided body made of copper wire or a copper wire material in which copper wire is braided.

[0166] Here, the nonwoven fabric is configured to be inserted into the interior of the braided body made of copper wire material so that its shape is maintained, thereby performing the role of stably fixing the nonwoven fabric provided as the absorbent (300) on the first refrigerant passage (210) arranged in the direction of gravity (i.e., in the up-down direction) or inclined with respect to the direction of gravity, and preventing it from flowing.

[0167] However, it is not necessary to support the nonwoven fabric by inserting it inside the braided body made of copper wire. It is also possible to adopt a support structure in which a single strand of copper wire penetrates the nonwoven fabric in the vertical direction or wraps the nonwoven fabric in a spiral shape.

[0168] In addition, the absorbent (300) may be formed by combining a nonwoven fabric with the inside of a braided body made of copper wire material to the extent that it can maintain its shape despite the load of the liquid refrigerant contained therein, and may also be formed by wrapping the copper wire itself or the braided body made of copper wire material in a spiral shape around the outer circumferential surface of the nonwoven fabric.

[0169] Meanwhile, in the case where the first refrigerant passage (210) is formed very long in the vertical direction, the heat dissipation unit (200) may further include at least one auxiliary absorber (301) in some part of the second refrigerant passage (220) on the upper side of the refrigerant flow space (205).

[0170] The auxiliary absorber (301) can be installed and secured in an auxiliary absorber installation part (not indicated in the drawing) that has been modified to have a wider width than a portion of the second refrigerant passage (220).

[0171] As shown in FIG. 10, two auxiliary absorbers (301) of this type (301-1, 301-2) can be arranged with vertical spacing relatively upward in the direction of gravity.

[0172] Meanwhile, as shown in FIGS. 8 to 11, the heat dissipation unit (200) may further include an air vent tube (270) at an end forming the heat dissipation plate (203) for evacuating the refrigerant flow space (205) before or after injecting the refrigerant into the refrigerant flow space (205).

[0173] The air vent tube (270) can be sealed through a predetermined caulking process after being cut by a cutting machine (not shown) when the evacuation of the refrigerant flow space (205) described above is completed, or can be inserted into a mounting groove (505) formed in the lower horizontal support bar (500DB) of the finger guard panel assembly (500) described above after the caulking process is completed without cutting, so as to be protected from the outside.

[0174] In addition, the one-side heat-conducting panel (200-1) and the other-side heat-conducting panel (200-2) constituting the heat dissipation unit (200) may be provided in the form of a plate made of SUS (stainless steel) among the metal panel members as described above. Therefore, the refrigerant filled inside may be water, unlike in the case where the metal panel member is made of aluminum.

[0175] This is because, when the material of the metal panel member constituting the heat dissipation unit (200) is adopted as aluminum, water is excluded from the types of refrigerants that can be adopted, as aluminum has a chemical property of changing into aluminum oxide while generating hydrogen substances when in contact with water.

[0176] The heat dissipation effect according to the heat dissipation unit (200) made of aluminum is expected to have much higher heat dissipation performance than that of SUS material due to the thermal conductivity of the material itself. However, the heat dissipation unit (200) in the lighting device (100) according to one embodiment of the present invention is provided as a metal panel member made of SUS material, but has a remarkable increase in heat dissipation performance by adopting a heat transfer method using a phase change material (particularly, water) that can be filled in the refrigerant flow space (205). Therefore, unlike the lighting device according to the prior art (see the background art section), there is no need for a separate additional heat dissipation structure for the concentrated heat generation phenomenon in the central portion, and sufficient heat dissipation can be achieved with only the heat dissipation unit (200) in one embodiment of the present invention that is arranged vertically in the vertical direction.

[0177] FIG. 13 is a perspective view showing an example of an implementation of an angle adjustment unit among the configurations of a lighting device according to one embodiment of the present invention, FIG. 14 is an exploded perspective view of FIG. 13, and FIGS. 15a and 15b are partial projection perspective views for explaining the operation of the angle adjustment unit by tilting rotation and steering rotation.

[0178] Referring to FIGS. 13 to 15b, a lighting device (100) according to one embodiment of the present invention may further include an angle adjustment unit (600) that is placed at the lower end of a lighting body (110) and adjusts the irradiation direction of an LED unit (150).

[0179] The angle adjustment unit (600) may include, as referenced in FIGS. 13 and 14, a fixing bracket (610) that fixes the lighting body (110) to a predetermined position, a steering block (620) that is rotated left and right based on an axis (S) that is vertical to the fixing bracket (610), and a tilting block (630) that is rotated back and forth by tilting via a left and right horizontal coupling axis (635,T) that is horizontal to the steering block (620), and to which the lower end of the lighting body (110) is connected.

[0180] Here, the coupling of the steering block (620) to the fixed bracket (610) can be rotatably achieved through a fixed panel (613) coupled to the lower part of the fixed bracket (610) with the lower part of the steering block (620) inserted into an installation hole (615) provided to penetrate the fixed bracket (610) in the vertical direction.

[0181] The steering block (620) is provided with a steering worm wheel gear (622) having a plurality of worm wheel gear teeth (not indicated in the drawing) formed on a portion of the outer surface, and the fixed bracket (610) is provided with a steering worm gear (621) having worm gear teeth (not indicated in the drawing) formed so as to be able to mesh with the worm wheel gear teeth of the steering worm wheel gear (622) and is rotatably provided so as to mesh with the steering worm wheel gear (622).

[0182] Here, the lighting body (110) can adjust the irradiation direction of the LED unit (150) by rotating the steering block (620) in the left and right directions according to the axial rotation of the steering worm gear (621).

[0183] In addition, the steering block (620) is formed in a left-right horizontal axis coupling hole (625) that penetrates in the left-right direction, and the lower part of the tilting block (630) can be tiltably coupled by a left-right horizontal coupling axis (635) that penetrates the left-right horizontal axis coupling hole (625).

[0184] In addition, the steering block (620) may be provided with a tilting worm wheel gear (632) that has a plurality of worm wheel gear teeth (not indicated in the drawing) formed on a portion of the outer surface thereof so as to be rotatable, and the lower portion of the tilting block (630) may be provided with a tilting worm gear (631) that has worm gear teeth (not indicated in the drawing) formed so as to mesh with the worm wheel gear teeth of the tilting worm wheel gear (632) so as to be rotatable.

[0185] Here, the lighting body (110) can adjust the irradiation direction of the LED unit (150) by tilting and rotating the tilting block (630) in the forward and backward direction according to the axial rotation of the tilting worm gear (631).

[0186] A bolt fastening hole (633) for bolt connection with the lower part of the lighting body (110) may be formed in the tilting block (630).

[0187] Fig. 16 is a perspective view showing a lighting device according to another embodiment of the present invention, and Figs. 17a and 17b are exploded perspective views of the front and rear parts for explaining the finger guard panel assembly among the configurations of Fig. 16.

[0188] A lighting device (100-1) according to another embodiment of the present invention, as shown in FIGS. 16 to 17b, may be implemented in a different embodiment from the finger guard assembly (500) as shown in FIGS. 2a to 5, in which a finger guard panel assembly (500-1) protecting a lighting body (110) and a heat dissipation unit (200) installed for heat dissipation thereof from the outside is provided.

[0189] That is, while the finger guard panel assembly (500) implemented as an example of one embodiment as referenced in FIGS. 2a to 5 is entirely provided in the form of a panel, the finger guard panel assembly (500-1) implemented as another example as referenced in FIGS. 16 to 17b can be modified and implemented so that some of the components are replaced with support pipes (510).

[0190] More specifically, a finger guard panel assembly (500) according to another embodiment may include, as referenced in FIGS. 17A and 17B, a left finger guard panel (500L) covering a left side of a plurality of heat dissipation units (200), a right finger panel (500R) covering a right side of a plurality of heat dissipation units (200), a lower horizontal support bar (500DB) connected to and supported by the lower ends of each of the right finger guard panel (500R) and the rear finger guard panel (500P), and an upper horizontal support bar (500UB) connected to and supported by the upper ends of each of the left finger guard panel (500L), the right finger guard panel (500R), and the rear finger guard panel (500P).

[0191] Here, among the configurations of the finger guard panel assembly (500-1) according to another implementation example, the left finger guard panel (500L) and the right finger guard panel (500R) are implemented in the same panel form as the left finger guard panel (500L) and the right finger guard panel (500R) of the finger guard panel assembly (500) according to the above-described implementation example, and the lower horizontal support bar (500DB) and the upper horizontal support bar (500UB) are the same in that they support the lower and upper parts of the left finger guard panel (500L) and the lower and upper parts of the right finger guard panel (500R) by connecting them in the left and right horizontal directions, respectively.

[0192] However, a finger guard panel assembly (500-1) according to another embodiment further includes a plurality of support pipes (510) arranged horizontally in the left and right horizontal directions, without separately providing an upper finger guard panel (500T) and a rear finger guard panel (500P) among the configurations of the finger guard panel assembly (500) of the above-described embodiment, and the plurality of support pipes (510) may be joined at least two places spaced apart in the front-back direction on the upper portions of the left finger guard panel (500L) and the right finger guard panel (500R), and may be joined at a plurality of places spaced apart in the vertical direction on the rear ends of the left finger guard panel (500L) and the right finger guard panel (500R).

[0193] Here too, it will be natural that a mounting groove (505) in which an air vent tube (270) of the heat dissipation unit (200) is accommodated can be formed long in the left and right directions in the lower horizontal support bar (500DB).

[0194]

[0195] FIG. 18 is a perspective view of the back surface in which another embodiment of an angle adjustment unit is installed among the configurations of a lighting device according to one embodiment of the present invention, FIG. 19 is an exploded perspective view of FIG. 18, FIG. 20 is a perspective view showing another embodiment of an angle adjustment unit among the configurations of a lighting device according to one embodiment of the present invention, and FIG. 21 is an exploded perspective view of FIG. 20.

[0196] Referring to FIGS. 18 to 21, in a lighting device (100) according to one embodiment of the present invention, the angle adjustment unit (1600) can be embodied in another embodiment.

[0197] If the angle adjustment unit (600) according to the above-described implementation example is for a user to manually adjust the irradiation direction of the LED unit (150) provided in the lighting body (110), the angle adjustment unit (1600) according to another implementation example is provided to automatically and remotely adjust the irradiation direction of the LED unit (150) provided in the lighting body (110) by means of a steering drive motor (1640) and a tilting drive motor (1650) that are electrically operated and are arranged at the lower end of the lighting body (110), as shown in FIGS. 18 and 19.

[0198] More specifically, the angle adjustment unit (1600) according to another implementation example may include a steering unit (1620) for adjusting the irradiation direction of the LED unit (150) in the left and right horizontal directions and a tilting unit (1630) for adjusting the irradiation direction of the LED unit (150) in the up and down vertical directions, as referenced in FIGS. 20 and 21.

[0199] Here, the angle adjustment unit (1600) according to another implementation example may further include a housing portion (1605) that covers and shields at least a portion of the steering portion (1620) and the tilting portion (1630).

[0200] The housing part (1605) may include a housing base panel part (1610) that primarily supports the steering part (1620) among the steering part (1620) and the tilting part (1630) and mediates installation in a place requiring lighting, a front housing (1605a) arranged to cover the steering part (1620) and the tilting part (1630) from the front, and a rear housing (1605b) arranged to cover the steering part (1620) and the tilting part (1630) from the rear.

[0201] The front housing (1605a), as referenced in FIG. 21, may be coupled to the upper surface of the housing base panel (1610) to cover the components disposed on the upper portion of the housing base panel (1610), excluding the steering drive motor (1640) and the tilting drive motor (1650) described later among the components of the steering unit (1620) and the tilting unit (1630).

[0202] The rear housing (1605b) can be coupled to one side of the front housing (1605a) to cover or provide a coupling portion for the steering drive motor (1640) and the tilting drive motor (1650), which are described later among the configurations of the steering unit (1620) and the tilting unit (630), as referenced in FIG. 21.

[0203] Here, a front screw fastening hole (not shown) and a rear shear screw fastening hole (1609h-b) for screw coupling using a housing assembly screw (1608) can be formed at the mutually facing ends of the front housing (1605a) and the rear housing (1605b).

[0204] The front housing (1605a) and the rear housing (1605b) can be provided to be able to rotate left and right about the steering shaft groove (not shown) or steering shaft boss (1615) described later on the upper portion of the housing base panel (1610).

[0205] Meanwhile, as referenced in FIG. 21, a steering shaft boss (1615) may be provided at the upper middle portion of the housing base panel portion (1610). The steering shaft boss (1615) may be formed to protrude from the upper portion of the housing base panel portion (1610), and may be provided with a corresponding stopping protrusion (1615P) and a corresponding stopping groove (1615H) that are mutually compatible with a stopping protrusion (not shown) and a stopping groove (not shown) of a steering worm wheel gear portion (1629) described later.

[0206] The steering unit (1620), as referenced in FIG. 21, may include a steering base panel (1621) in which the upper portion of the steering shaft (1626) is bolted and rotates in conjunction with the rotation of the steering shaft (1626), a steering worm gear unit (1641) that is horizontally arranged on one side of the lower portion of the steering base panel (1621) and rotates along the axis, and a steering worm wheel gear unit (1629) that is interposed on the outer surface of the steering shaft (1626) but is fixed so as not to rotate relative to the housing base panel unit (1610).

[0207] A plurality of worm wheel gear teeth may be formed on the outer surface of the steering worm wheel gear portion (1629), and at least one stopping protrusion and stopping groove may be formed on the lower surface of the steering worm wheel gear portion (1629) so as to be fixed without rotating relative to the housing base panel portion (1610).

[0208] The steering worm gear portion (1641) can be provided to be rotatable via a worm gear installation bracket (1642) coupled to the lower portion of the steering base panel (1621).

[0209] Here, a worm wheel gear tooth (not shown) that meshes with the worm gear tooth of the steering worm gear portion (1641) may be formed on a portion of the outer surface of the steering worm wheel gear portion (1629). In addition, the steering portion (1620) may further include a wheel bearing portion (1628) interposed between the outer surface of the steering worm wheel gear portion (1629) and the steering base panel (1621).

[0210] The inner ring of the wheel bearing part (1628) is press-fitted and fixed to the remaining portion of the outer surface of the steering worm wheel gear part (1629) where no worm wheel gear teeth are formed, and the outer ring of the wheel bearing part (1628) is press-fitted and fixed to the steering base panel (1621), thereby supporting the steering rotation of the steering base panel (1621) with the steering worm wheel gear part (1629) as the rotation center.

[0211] Meanwhile, the steering unit (1620), as referenced in FIG. 21, may further include a steering drive motor (1640) that is directly connected to one of the ends of the steering worm gear unit (1641), but is coupled to one side of the front housing (1605a).

[0212] Here, the motor shaft (not shown) of the steering drive motor (1640) can penetrate one side of the front housing (1605a) and be directly connected to one end of the steering worm gear portion (1641) provided on the inside of the front housing (1605a).

[0213] The tilting part (1630), as referenced in FIG. 21, may include a tilting axis (1636) provided horizontally with respect to the upper surface of the steering base panel (1621), and a tilting bracket panel (1631) that tilts and rotates in the up-down or front-back direction around the tilting axis (1636), and to which the lower part of the lighting body (110) of the lighting device (100) according to one embodiment of the present invention is fixed.

[0214] On the upper surface of the steering base panel (1621), a pair of vertical mounting panels (1622) may be arranged at a predetermined distance apart in the left and right directions, and a tilting axis installation hole (not indicated in the drawing) may be formed in each of the pair of vertical mounting panels (1622) in which a tilting axis (1636) is installed to be rotatably supported via a rotation support bearing part (1623).

[0215] Here, one of the pair of vertical mounting panels (1622) may be provided as an integral mounting panel (1622-1) integrally formed with respect to the steering base panel (1621) and a detachable mounting panel (1622-2) detachably coupled to the integral mounting panel (1622-1). In a state where the detachable mounting panel (1622-2) is separated from the integral mounting panel (1622-1), one end of the tilting axis (1636) is secured to be mounted on the integral mounting panel (1622-1), and then the tilting axis (1636) can be stably and easily installed by coupling the detachable mounting panel (1622-2) to the integral mounting panel (1622-1).

[0216] In addition, the tilting part (630) may further include a tilting worm wheel gear part (1639) integrally formed on the outer surface of the tilting shaft (1636), as shown in FIG. 21, and having worm wheel gear teeth (not shown) formed on the outer surface, and a tilting worm gear part (1651) having worm gear teeth (not shown) formed on the outer surface to mesh with the worm wheel gear teeth of the tilting worm wheel gear part (1639).

[0217] Here, the tilting worm gear portion (1651) can also be fixed to the upper surface of the steering base panel (1621) via a worm gear installation bracket (not indicated in the drawing) similar to the steering worm gear portion (1641). Accordingly, when the steering base panel (1621) rotates, the tilting worm gear portion (1651) can also rotate in conjunction with the steering.

[0218] At this time, the tilting worm gear part (1651) may be arranged so as to be long in the front-back horizontal direction, but positioned between a pair of vertical mounting panels (1622), and the tilting worm wheel gear part (1639) may be arranged so as to be integrally formed on the outer surface of the tilting axis (1636) relatively higher.

[0219] Meanwhile, on the lower surface of the tilting bracket panel (1631), a pair of tilting mounting panels (1632) can be vertically coupled to mediate coupling to each outer surface of a pair of vertical mounting panels (1622), as shown in FIG. 21.

[0220] The tilting bracket panel (1631) may be formed with panel screw penetration holes (not indicated in the drawing) extending vertically therethrough for fastening a pair of tilting mounting panels (1632) using at least two fastening members (1634). In addition, the tilting bracket panel (1631) may be formed with bolt penetration holes (1635) extending vertically therethrough for fastening bolts (1637) for fastening installation to the lower portion of the lighting body (110).

[0221] Meanwhile, both ends of the tilting axis (1636) can be exposed to the outside by passing through the tilting axis installation holes of a pair of vertical mounting panels (1622).

[0222] Here, at both ends of the tilting axis (1636) exposed to the outside through the tilting axis installation hole, at least one shaped projection (not shown) forming both end surfaces and at least one shaped groove (not shown) formed inwardly from both end surfaces of the tilting axis (636) can be formed.

[0223] In addition, on the inner side of each of the two sides of a pair of tilting mounting panels (1632) facing the tilting axis installation hole, a corresponding matching projection (1632P) and a corresponding matching groove (1632H) that are respectively matched to the matching projection and the matching groove formed at both ends of the tilting axis (1636) may be formed.

[0224] In this way, the corresponding matching protrusions (1632P) and matching grooves (1632H) of the tilting mounting panel (1632) are coupled to the matching protrusions and matching grooves formed at both ends of the tilting axis (1636) so as to be matched, so that when the tilting axis (1636) rotates about its axis, the pair of tilting mounting panels (1632) and the tilting bracket panel (1631) can tilt and rotate in the forward and backward direction (or up and down direction) based on the tilting axis (1636), thereby enabling the tilting adjustment of the irradiation direction of the lighting device (100) according to one embodiment of the present invention.

[0225] Here, a tilting bracket panel (1631) and a pair of tilting mounting panels (1632) can be installed so as to be exposed to the outside of the front housing (1605a) so as to be coupled to both ends of the tilting axis (1636) through an outer tilting axis installation hole (1606) formed to penetrate the inside and outside on both sides of the upper portion of the front housing (1605a).

[0226] Meanwhile, the tilting unit (1630) may further include a tilting drive motor (650) having a motor shaft (not indicated in the drawing) directly connected to either end of the tilting worm gear unit (1651), as shown in FIG. 21.

[0227] Here, the motor shaft of the tilting drive motor (650) can be directly connected to one end of the tilting worm gear portion (1651) provided on the inside of the front housing (1605a) by penetrating one side of the front housing (1605a).

[0228] The tilting part (1630) having such a configuration can rotate the motor shaft in one direction or the other direction when the user inputs a predetermined signal after applying power to the tilting drive motor (1650), and accordingly, the tilting worm gear part (1651) having worm gear teeth meshed with the worm wheel gear teeth of the tilting worm wheel gear part (1639) integrally formed on the tilting shaft (1636) rotates, thereby tilting and rotating the tilting bracket panel (1631) in the forward and backward direction (or up and down direction).

[0229] In this way, the steering drive motor (1640) and the tilting drive motor (1650) are configured to electrically rotate the motor shaft, thereby providing an advantage of remote automatic adjustment compared to a conventional worker (or installer) manually adjusting the direction of investigation.

[0230] FIG. 22 is a perspective view of the back surface of a lighting device according to one embodiment of the present invention, in which another embodiment of an angle adjustment unit is installed; FIG. 23 is an exploded perspective view of FIG. 22; FIG. 24 is a perspective view showing another embodiment of an angle adjustment unit in the lighting device according to one embodiment of the present invention; and FIG. 25 is an exploded perspective view of FIG. 24.

[0231] Referring to FIGS. 22 to 25, in a lighting device (100) according to one embodiment of the present invention, the angle adjustment unit (2600) can be embodied in another embodiment.

[0232] Another embodiment of the angle adjustment unit (2600) includes a tilting rotation panel portion (2620) and a steering rotation panel portion (2630), as referenced in FIGS. 22 to 25.

[0233] The tilting rotation panel part (2620) is fixed to the lighting body (110) and can be provided to tilt and rotate in the forward and backward directions based on an arbitrary left and right horizontal axis (2601) provided by the steering rotation panel part (2630) in conjunction with the lighting body (110).

[0234] More specifically, the tilting rotation panel section (2620) may include a tilting fixed panel (2621) coupled to a pair of mounting panel sections (180) spaced apart in the left and right directions on the lower (or upper) side of the lighting body (110), and a tilting rotation panel (2622) formed to be bent at a predetermined angle with respect to the tilting fixed panel (2621).

[0235] Here, the tilting fixed panel (2621) and the tilting rotation panel (2622) are each provided as a pair, and can be combined to enable forward and backward tilting with respect to the steering rotation panel (2632) provided as a pair as a configuration of the steering rotation panel portion (2630) described later.

[0236] A fixing bolt (2637) can be inserted through the tilting fixing panel (2621) to be fastened to the mounting panel end (180) of the lighting body (110).

[0237] In addition, a pair of tilting rotation panels (2622) may be bent orthogonally to the outer end of the tilting fixed panel (2621). However, the bending angles of the tilting rotation panel (2622) and the tilting fixed panel (2621) do not necessarily have to be orthogonal, and may be formed at any angle as long as the angle matches the corresponding surface of the steering rotation panel (2632) among the configurations of the steering rotation panel portion (2630) described later.

[0238] The steering rotation panel portion (2630) may include a steering fixed panel (2631) coupled to an installation portion (not shown) of a location where a lighting device (100) according to one embodiment of the present invention is installed, and a pair of steering rotation panels (2632) formed to be bent at a predetermined angle with respect to the steering fixed panel (2631).

[0239] A pair of steering rotation panels (2632) may be formed by bending perpendicularly to the outer end of the steering fixed panel (2631) and arranged to be contacted with each inner surface of a pair of tilting rotation panels (2622) of the tilting rotation panel portion (2620).

[0240] Referring to FIG. 24, a steering fixed panel (2631) and a pair of steering rotation panels (2632) can be manufactured integrally by molding, and each connecting portion of the steering fixed panel (2631) and the pair of steering rotation panels (2632) can be integrally formed with a plurality of strength reinforcing ribs (2639), so that the strength of the overall angle adjustment unit (2600) can be reinforced.

[0241] Meanwhile, a steering fixing hole (2637H) may be formed in the center portion of the steering fixing panel (2631) that penetrates vertically and to which a steering hinge bolt (not shown) for the installation part is fixed. In addition, a steering guide slot (2633) cut in the same rotational trajectory range spaced a predetermined distance in the radial direction from the steering fixing hole (2637H) may be further formed in the steering fixing panel (2631).

[0242] The steering rotation panel part (2630) is freely rotatable with the steering hinge bolt hinged to the steering fastening hole (2637H), and the steering rotation angle is adjusted with the steering guide bolt (not shown) inserted into the steering guide slot (2633), and then the steering guide bolt is tightened so that the user can adjust the irradiation direction of the LED unit (150) to a desired angle. Here, an angle indication scale (2633) is printed around the steering guide slot (2633) of the steering fixed panel (2631), so that the user can visually estimate the steering angle of the lighting device (100).

[0243] In addition, a tilting fastening hole (2627H) may be formed in the center portion of a pair of tilting rotation panels (2622) that penetrates in the front-back direction and through which a tilting hinge bolt (2627B) is fastened to the center portion of a pair of steering rotation panels (2632). In addition, a tilting guide slot (2623) cut in the same rotation trajectory range spaced apart from the tilting fastening hole (2627H) in the radial direction may be further formed in the pair of tilting rotation panels (2622).

[0244] A pair of tilting rotation panels (2622) can freely rotate with respect to a steering rotation panel (2632) to which a tilting hinge bolt (2627B) is fastened through a tilting fastening hole (2627H), and a tilting guide bolt (2625) is inserted into a tilting guide slot (2623) so that the tilting rotation angle is adjusted, and then the tilting guide bolt (2625) is tightened so that the user can adjust the irradiation direction of the LED unit (150) to a desired angle. Here, although not shown, it will be understood that a configuration corresponding to the above-described angle display scale (2633) can be printed on the pair of tilting rotation panels (2622).

[0245] Another embodiment of the angle adjustment unit (2600) configured as described above is similar to the angle adjustment unit (600) of one embodiment in that the user manually adjusts the irradiation direction of the LED unit (150), and is different from the angle adjustment unit (1600) of another embodiment in that it automatically adjusts the irradiation direction of the LED unit (150). However, the angle adjustment unit (2600) of another embodiment has the advantage of being very simple in structure and being advantageous when the user manually adjusts the angle when the lighting device (100), which is relatively heavy, is positioned relatively lower than the angle adjustment unit (2600).

[0246]

[0247] According to a lighting device (100) according to one embodiment of the present invention having such a configuration, the phenomenon of heat generated from an LED unit (150) being concentrated in the central portion is eliminated, and the heat dissipation efficiency is maximized by a refrigerant phase change method, which provides the advantage of being able to perform effective heat dissipation without changing the structure through a heat dissipation unit (200) having a plurality of heat-conducting panel bodies (200) made of SUS material.

[0248]

[0249] Hereinafter, lighting devices according to embodiments of the present invention have been described in detail with reference to the attached drawings. However, the embodiments of the present invention are not necessarily limited to the above-described embodiments, and it will be understood that various modifications and equivalent implementations are possible by those skilled in the art to which the present invention pertains. Therefore, the true scope of the present invention is defined by the claims set forth below.

[0250]

[0251] The present invention provides a lighting device capable of maximizing heat dissipation performance by including a heat dissipation unit capable of effectively dissipating heat generated from an LED unit.

Claims

1. LED unit that generates and irradiates a predetermined amount of light; A lighting body having a thermally conductive material, an installation space with an open front for installing the LED unit, and a plurality of press-fittings integrally formed in the form of a pair of slot ribs extending in the vertical direction on the back surface; and A lighting device comprising: a plurality of heat dissipation units, each of which is force-fitted so that a refrigerant flow space filled with refrigerant is formed therein, and at least a portion of the refrigerant flow space is positioned within a pair of slot ribs of the press-fit portion; 2. In claim 1, The above heat dissipation unit, A one-sided heat-conducting panel forming one side of the thickness direction of the above refrigerant flow space; and Including a heat-conducting panel on the other side forming the thickness direction side surface of the above refrigerant flow space; A lighting device in which the above-described refrigerant flow space is formed by joining the one-side heat-conducting panel and the other-side heat-conducting panel, which are made of two metal panel members, along the edge end, or by bending a single metal panel member and then joining the one-side heat-conducting panel and the other-side heat-conducting panel, along the edge end.

3. In claim 2, A lighting device wherein the metal panel member forming the one-side heat-conducting panel and the other-side heat-conducting panel is made of SUS (stainless steel) material.

4. In any one of claims 1 to 3, The refrigerant flow space provided in the above heat dissipation unit is, A first refrigerant path provided in an evaporation region in which a liquid refrigerant among the above refrigerants is stored and the stored liquid refrigerant is phase-changed into a gaseous state by heat supplied from the LED unit; and A lighting device comprising: a plurality of second refrigerant channels formed in a direction of gravity or inclined relative to the direction of gravity toward the first refrigerant channel and guiding liquid refrigerant that has changed its phase from a gaseous state to a liquid state to flow toward the first refrigerant channel; 5. In claim 4, A lighting device in which the above refrigerant is made of water capable of changing from a liquid state to a gaseous state or from a gaseous state to a liquid state due to the thermal conductivity of a one-side heat-conducting panel forming one side of the refrigerant flow space and the other-side heat-conducting panel forming the other side of the refrigerant flow space.

6. In claim 4, A lighting device in which each of the first refrigerant passages of the plurality of heat dissipation units is installed by being press-fitted into the plurality of press-fittings arranged at a predetermined distance apart in the left and right directions on the rear surface of the lighting body, and is arranged vertically up and down in the direction of gravity.

7. In claim 4, A lighting device, wherein the plurality of second refrigerant channels are defined to be separated from adjacent second refrigerant channels by a plurality of inclined guides that protrude inwardly from a one-side heat-conducting panel forming one side of the refrigerant flow space and an other-side heat-conducting panel forming the other side of the refrigerant flow space.

8. In claim 7, A lighting device in which at least one of the first and second refrigerant passages or the plurality of inclined guides is connected to the first refrigerant passage at one end and the other end, and the end connected to the first refrigerant passage is positioned relatively lower in the direction of gravity.

9. In claim 7, A lighting device wherein at least one of the first end and the second end of the second refrigerant passage or the plurality of inclined guides is connected to the first refrigerant passage, and the first end and the second end are connected in a straight line.

10. In claim 7, The above refrigerant flow space is, A lighting device further comprising a plurality of third refrigerant flow paths, the third refrigerant flow paths being defined as regions where the plurality of inclined guides are formed among the facing surfaces of the one-sided heat-conducting panel and the other-sided heat-conducting panel, and which are not joined but are spaced apart from each other within the refrigerant flow space.

11. In claim 10, The condensed liquid refrigerant in the condensation region other than the above evaporation region flows in the direction of gravity along the plurality of inclined guides defining the second refrigerant flow path, A lighting device in which the vaporized refrigerant in the above evaporation area flows as a gas along each of the plurality of inclined guides defining the third refrigerant path.

12. In claim 7, A lighting device, wherein the one-side heat-conducting panel and the other-side heat-conducting panel have a plurality of strength reinforcing parts formed so as to protrude and contact each other within the refrigerant flow space to reinforce the strength of the one-side heat-conducting panel and the other-side heat-conducting panel.

13. In claim 12, A lighting device wherein the plurality of strength reinforcing members are formed such that their cross-sections protrude at least further into the refrigerant flow space than the ends of the plurality of inclined guides.

14. In claim 12, A lighting device, wherein the plurality of strength reinforcing members are joined by a joining process including a laser welding method at a portion where they intersect each other within the refrigerant flow space, thereby forming the refrigerant flow space between the one-side heat-conducting panel and the other-side heat-conducting panel.

15. In claim 7, The above heat dissipation unit, A lighting device further comprising: an absorber having a plurality of pores arranged in the first refrigerant passage and configured to absorb liquid refrigerant in the refrigerant flow space and then evaporate the liquid refrigerant into a gaseous refrigerant through heat transferred from the LED unit; 16. In claim 15, The above heat dissipation unit, A lighting device further comprising: at least one auxiliary absorber arranged in a second refrigerant passage on an adjacent inclined guide among the plurality of inclined guides, the auxiliary absorber capturing and providing liquid refrigerant to the absorber.

17. In claim 1, A lighting device further comprising an angle adjustment unit arranged at the lower end of the lighting body and adjusting the irradiation direction of the LED unit.

18. In claim 17, The above angle adjustment unit, A fixing bracket for fixing the above lighting body to a predetermined position; A steering block that rotates left and right about an axis perpendicular to the above fixed bracket; and A lighting device comprising: a tilting block that tilts and rotates in the forward and backward directions via a horizontal left and right coupling axis that is horizontal to the steering block, and to which the lower part of the lighting body is connected; 19. In claim 18, A lighting device in which the rotational connection of the steering block to the fixed bracket is achieved by means of a fixed panel that is connected to the lower part of the fixed bracket while the lower part of the steering block is inserted into an installation hole formed to penetrate the fixed bracket in the upper and lower directions.

20. In claim 18, The above steering block is equipped with a steering worm wheel gear having a number of worm wheel gear teeth formed on a portion of the outer surface. The above fixed bracket is provided with a steering worm gear that is rotatable and has worm gear teeth formed to mesh with the worm wheel gear teeth of the above steering worm wheel gear. A lighting device in which the steering block rotates left and right according to the rotation of the shaft of the steering worm gear.

21. In claim 18, The above steering block is equipped with a tilting worm wheel gear having a number of worm wheel gear teeth formed on a portion of the outer surface. The above tilting block is provided with a tilting worm gear that is rotatable and has worm gear teeth formed so as to mesh with the worm wheel gear teeth of the above tilting worm wheel gear. A lighting device in which the tilting block tilts and rotates in the forward and backward directions according to the axial rotation of the tilting worm gear.

22. In claim 17, The above angle adjustment unit, A housing base panel portion that fixes the lighting body requiring tilting or steering adjustment in a predetermined position; A steering base panel that rotates left and right based on a vertical steering axis relative to the housing base panel portion; and A lighting device comprising: a tilting bracket panel that tilts and rotates forward and backward via a horizontal tilting axis relative to the steering base panel, and to which the lower part of the lighting body is connected; 23. In claim 17, The above angle adjustment unit, A tilting rotation panel part fixed to the above lighting body and provided to tilt and rotate in the forward and backward direction in conjunction with the above lighting body; and A lighting device comprising: a steering rotation panel portion that is rotatably connected to an installation portion where the lighting device is installed and provides an arbitrary left and right horizontal axis to the tilting rotation panel portion;

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