KR101729011B1 - Optic cover and lighting device having same - Google Patents

Optic cover and lighting device having same Download PDF

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Publication number
KR101729011B1
KR101729011B1 KR1020150064312A KR20150064312A KR101729011B1 KR 101729011 B1 KR101729011 B1 KR 101729011B1 KR 1020150064312 A KR1020150064312 A KR 1020150064312A KR 20150064312 A KR20150064312 A KR 20150064312A KR 101729011 B1 KR101729011 B1 KR 101729011B1
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KR
South Korea
Prior art keywords
region
rim
housing
light source
source unit
Prior art date
Application number
KR1020150064312A
Other languages
Korean (ko)
Other versions
KR20160131578A (en
Inventor
이영규
배현철
Original Assignee
엘지전자 주식회사
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Priority to KR1020150064312A priority Critical patent/KR101729011B1/en
Publication of KR20160131578A publication Critical patent/KR20160131578A/en
Application granted granted Critical
Publication of KR101729011B1 publication Critical patent/KR101729011B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F21S2/005—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/049—Patterns or structured surfaces for diffusing light, e.g. frosted surfaces

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

An optical cover according to an embodiment has a shape corresponding to an opening of a housing and includes a diffusion plate for diffusing light incident from the light source unit, a rim disposed along the periphery of the diffusion plate and being inserted into the opening, Wherein the rim is divided into a first region forming a periphery of the coupling hook and a second region excluding the first region, and the rim is divided into a first region and a second region, And the strain of the first region is larger than the strain of the second region.

Description

TECHNICAL FIELD [0001] The present invention relates to an optical cover,

Embodiments relate to an optical cover and a lighting apparatus including the same.

Generally, indoor or outdoor lighting is used as a lamp or a fluorescent lamp. In the case of such a bulb or fluorescent lamp, there is a problem that its lifetime is short and it is frequently exchanged. In addition, a conventional fluorescent lamp may deteriorate over time, and the illuminance may gradually decrease.

In order to solve such a problem, a light emitting diode (LED) capable of realizing excellent controllability, fast response speed, high electric light conversion efficiency, long life, low power consumption, Various types of lighting modules are being developed.

Light emitting diodes (LEDs) are a type of semiconductor devices that convert electrical energy into light. The light emitting diode has advantages of low power consumption, semi-permanent lifetime, fast response speed, safety, and environmental friendliness compared with conventional light sources such as fluorescent lamps and incandescent lamps. Accordingly, much research has been conducted to replace an existing light source with a light emitting diode, and a light emitting diode has been increasingly used as a light source for lighting devices such as various liquid crystal display devices, electric sign boards, and street lamps used outside the room.

Since such a light emitting diode is a point light source, an optical cover for converting a light into a plane light is used in a lighting apparatus in which a light emitting diode is used.

The optical cover is generally coupled to the housing. Conventionally, in the integral structure in which the upper and lower structures are separated or the upper and lower structures are not separated to fix the optical cover, the optical cover must have a structure that can be fixed to the housing.

At this time, if a clearance is generated between the optical cover and the housing, there is a problem that the coupling structure can not easily come out because the appearance of the product is not good.

Further, there is a problem that the optical cover and the housing must be in close contact with each other so that dust or the like does not flow from the outside.

The optical cover according to the embodiment is intended to facilitate the assembly of the optical cover and the housing, and to improve the adhesion between the housing and the optical cover.

An optical cover according to an embodiment has a shape corresponding to an opening of a housing and includes a diffusion plate for diffusing light incident from the light source unit, a rim disposed along the periphery of the diffusion plate and being inserted into the opening, Wherein the rim is divided into a first region forming a periphery of the coupling hook and a second region excluding the first region, and the rim is divided into a first region and a second region, And the strain of the first region is larger than the strain of the second region.

The embodiment has the advantage that the coupling hook of the optical cover is easily fastened to the hook groove of the housing and the advantage that the rim is in close contact with the housing by differently straining the region where the coupling hook is formed in the rim of the optical cover and the other region do.

The embodiment also has the advantage of preventing foreign matter entering between the optical cover and the housing.

Further, the embodiment has a structure for making the thickness of the rim different, so that there is an advantage of easily manufacturing an integral optical cover.

1 is a diagram of a lighting control system in accordance with an embodiment of the present invention.
2 is a view showing a configuration of a lighting apparatus according to an embodiment of the present invention.
3 is an exploded perspective view of a lighting apparatus according to an embodiment of the present invention,
4 is an assembled perspective view of a lighting device according to an embodiment of the present invention,
5 is a partial cross-sectional view of a lighting apparatus according to an embodiment of the present invention,
6A is a perspective view of an optical cover according to an embodiment of the present invention,
FIG. 6B is a top plan view of an optical cover according to an embodiment of the present invention,
6C is a cross-sectional view of the optical cover shown in FIG. 6B taken along the line AA,
7 is a cross-sectional view of a diffusion plate according to an embodiment of the present invention,
8 is a partial side view of an optical cover according to another embodiment of the present invention,
9 is a partial side view of an optical cover according to another embodiment of the present invention.

The angles and directions referred to in the process of describing the structure of the embodiment are based on those shown in the drawings. In the description of the structures constituting the embodiments in the specification, reference points and positional relationships with respect to angles are not explicitly referred to, reference is made to the relevant drawings.

Hereinafter, embodiments will be described in detail with reference to the drawings.

1 is a diagram of a lighting control system in accordance with an embodiment of the present invention.

The lighting control system includes a remote control device (200) and a lighting device (100).

The remote control device 200 and the illuminating device 100 can perform bidirectional communication with each other, and the communication method can use Bluetooth, which is one of the short-range wireless communication methods, but is not limited thereto.

When the remote control device 200 and the lighting device 100 perform bidirectional communication with each other using Bluetooth, each of the remote control device 200 and the lighting device 100 includes the communication module 190 described later.

When the remote control device 200 receives an input by the user's operation, the remote control device 200 transmits the signal to the lighting device 100 using Bluetooth.

The signal transmitted from the remote control device 200 to the illuminating device 100 may include a brightness control signal, a hue control signal, and an on-off control signal of the light emitting device included in the illuminating device 100.

The remote control device 200 may include a mobile terminal or a remote controller provided with software for controlling the lighting device 100.

That is, the remote control device 200 may be a mobile terminal that provides Bluetooth low energy communication, and may be a simple structure remote controller that provides Bluetooth low energy communication.

When the remote control device 200 is implemented as a mobile terminal, the mobile terminal may be a conventional mobile phone such as a cellular phone, a Personal Communication Service (PCS) phone, a GSM phone, a CDMA-2000 phone, a WCDMA phone, ), A PDA (Personal Digital Assistants), a smart phone, and a Mobile Broadcast System (MBS) phone.

The lighting device 100 receives a signal transmitted from the remote control device 200 and performs an operation based on the received signal.

The lighting device 100 is provided with a communication module 190 for communication with the remote control device 200.

The communication module 190 may be a communication module 190 using a Bluetooth low energy standard such as a communication standard used in the remote control device 200. [

The communication module 190 may use various local communication standards.

2 is a view showing a configuration of a lighting apparatus according to an embodiment of the present invention.

2, the lighting apparatus 100 includes a power supply unit 160, an illumination driving unit 169, a light source unit 130, and a communication module 190.

The power supply unit 160 supplies driving power to each component constituting the lighting apparatus 100.

For example, the power supply unit 160 receives the AC power of 110V to 220V, and can supply DC power of any one of 25V, 50V, and 100V to the illumination driver 169 using the AC power. Also, the power supply unit 160 can supply DC power of 3V to the communication module 190 using the inputted AC power.

The illumination driving unit 169 receives power from the power supply unit 160 and changes the driving power supplied to the light source unit 130 based on the supplied power. The illumination driver 169 controls the brightness, color, and the like of the light source unit 130 based on the control signal received from the communication module 190.

The communication module 190 performs wireless communication with the remote control device 100. The communication module 190 receives the control signal transmitted from the remote control device 100 and transmits the control signal to the illumination driving unit 169 so that the power supplied to the light source unit 130 is controlled.

The illumination device 100 of the embodiment includes a communication module 190 therein and receives a control signal transmitted from the remote control device 200 through the communication module 190 and controls the light source unit 130 .

FIG. 3 is a perspective view illustrating an illumination apparatus according to an embodiment of the present invention. FIG. 4 is a perspective view illustrating an illumination apparatus according to an embodiment of the present invention. Sectional view.

3 to 5, the lighting apparatus 100 according to the embodiment includes a light source unit 130 that generates light, a housing 180 that houses the light source unit 130 therein, and has an opening 187, And an optical cover 140 that covers the light source unit 130 and is inserted into the opening 187 of the housing 180 to be diffused and diffuses the light generated by the light source unit 130.

The lighting apparatus 100 may further include a power supply case 110 and a reflector 120 in which the power supply unit 160 and / or the communication module 190 are accommodated.

The light source unit 130 generates light and supplies light to the illumination device 100.

For example, the light source unit 130 may include a point light source 131 and a circuit board 132 on which the point light sources are located. The light source unit 130 is housed inside the housing 180, and emits light downward. Specifically, the light source unit 130 is supported on one side of the housing 180.

Here, the point light source 131 includes a semiconductor element such as a light emitting diode.

The circuit board 132 may be a printed circuit board (PCB), a metal core PCB, a flexible PCB, a ceramic PCB, or the like.

One or a plurality of light emitting elements may be disposed. Further, when a plurality of light emitting elements are arranged, each light emitting element may emit different colors or may have different color temperatures.

The power supply case 110 accommodates the power supply unit 160 and / or the communication module 190. The power supply unit 160 and the communication module 190 are spaced apart from the housing 180. This is to prevent the heat generated in the power source unit 160 from being transmitted to the light source unit 130 to overheat the light source unit 130.

Specifically, the power supply unit 160 is disposed on the upper portion of the housing 180 so as to be spaced apart from the housing 180. The power supply case 110 is formed such that a power supply 160 housed therein is spaced apart from the housing 180.

Accordingly, the power source unit 160 may be located in the power source case 110, and the light source unit 130 may be located inside the housing 180 or the reflector 120, which are disposed apart from the power source case 110.

The power source unit 160 and the light source unit 130 may be electrically connected by a wire (not shown). The power case 110 may be formed with a wire pipe 119 through which a wire passes. The outer lumen canal tube 119 is inserted into the through hole 189 formed in the housing 180.

At this time, the power source case 110 receives heat from the power source unit 160 and dissipates heat. For this purpose, the power supply case 110 may be formed of a metal material or a resin material having a high heat emission efficiency, but the present invention is not limited thereto.

For example, the power supply case 110 may be formed by coupling the first case 111 and the second case 113. [

Of course, the power case 110 may be formed by combining three or more segments.

The power source unit 160 is connected to an external power source through a cable (not shown). Further, the first case 111 is engaged with the second case 113 to press the cable.

The cable 135 is positioned between the first case 111 and the second case 113 and the cable 135 is pressed by the coupling force between the first case 111 and the second case 113, do.

The first case 111 and the second case 113 are hinged together. Therefore, the second case 113 is rotated around the hinge, and the cable is pressed and fixed.

 In addition, the power case 110 may have a fixed blade 150 rotatably coupled thereto.

The fixed blade 150 is seated on the back surface of the ceiling to fix the lighting apparatus 100 when the lighting apparatus 100 is inserted and fixed into the ceiling with the front exposed only of the housing 180. [

At this time, the fixed blade 150 may have an elastic restoring force forward. Specifically, the fixed blade 150 is provided with an elastic force by the torsion spring 153.

The housing 180 defines a space in which the light source unit 130 and / or the reflector 120 are accommodated. In addition, the housing 180 provides a place where the optical cover 140 is coupled. Preferably, the housing 180 may function as a heat sink for transmitting heat generated from the light source unit 130 to the outside.

The housing 180 is thermally connected to the light source unit 130 and receives heat generated from the light source unit 130. The housing 180 dissipates the heat transferred from the light source unit 130 to the outside.

Accordingly, the housing 180 may be made of a metal or a resin material having an excellent thermal conductivity.

In addition, the housing 180 may have a structure for increasing the contact area with air. Although not shown in the drawings, a plurality of holes or a plurality of pins may be formed in the housing 180.

The housing 180 may be spaced apart from the power source case 110. The housing 180 may have a structure that restricts the heat from being transmitted to the power case 110 while dissipating the heat received from the light source unit 130 to the outside.

More specifically, the housing 180 defines a space in which the light source unit 130 is supported by a lower member 181 supported by the light source unit 130 and downwardly connected to the rim of the lower member 181, And a side wall 182 defining an opening 187 to which the cover 140 is coupled. In addition, the housing 180 may further include a flange 185 formed to extend outward from the side wall 182.

The lower member 181 supports the light source unit 130. The lower member 181 may be thermally connected to the light source unit 130. Here, the term " thermally connected " would mean that the heat transfer between the components is connected efficiently.

Specifically, the circuit board 132 of the light source unit 130 may be in surface contact with the lower surface of the lower member 181.

The side wall 182 extends downward from the rim of the lower member 181 to define a space in which the light source unit 130 is located and an opening 187. The sidewalls 182 may form a closed space in a plane perpendicular to the downward direction. The side wall 182 dissipates the heat transferred from the lower member 181 to the outside.

Specifically, the side wall 182 includes an inclined portion 182 having a section extending downward for light diffusion, a step 183 for supporting the optical cover 140, and an optical cover 140, As shown in FIG.

The inclined portion 182 has a section that expands as it goes downward, and determines the reflection angle of the reflector 120 when the reflector 120 is provided. The inclined portion 182 is coated on the inner surface of the reflector 120 when the reflector 120 is not provided, thereby improving the light directing angle of the light emitted from the light source unit 130. The inclined portion 182 extends downward from the rim of the lower member 181.

The step 183 provides a place where the optical cover 140 is supported. Specifically, the plank can form a surface having a predetermined area in the vertical direction. The step 183 is supported on the upper end of the rim 142 of the optical cover 140. Further, the step 183 supports the waterproof ring 170, which will be described later. The step 183 has a shape extending outward from the lower end of the inclined portion 182.

The housing 180 is formed with a hook groove 188 into which the coupling hook 143 of the optical cover 140 is fastened. The hook groove 188 is disposed in the contact portion 184. The adhered portion 184 provides a place where the optical cover 140 is inserted and closely contacted. In addition, the above-described hook groove 188 is formed in the contact portion 184. [ The hook groove 188 may be formed such that the inner surface of the contact portion 184 is recessed outward. Further, the hook groove 188 may be realized not only as a groove but also as a hole. In Fig. 3, the hook groove 188 is shown as a hole.

The adhered portion 184 is in close contact with the outer surface of the rim 142 to limit the entry of foreign matter and moisture into the space between the optical cover 140 and the housing 180. The adhered portion 184 has a shape corresponding to the rim 142 such that the rim 142 is inserted. Preferably, the adhered portion 184 may be ring-shaped viewed from below. In addition, the adhered portion 184 may have a height greater than the rim 142 such that the rim 142 is sufficiently interpolated.

The flange 185 functions to cover the buried portion when the housing 180 is embedded in the ceiling. The flange 185 is formed extending from the lower end of the contact portion 184.

The reflector 120 guides the light generated by the light source unit 130 to one side.

Specifically, the reflector 120 has a shape that the width of the reflector 120 increases as it goes forward in the cross-section, and guides the light generated by the light source unit 130 forward.

The reflector 120 may be made of a metal or a resin material, which is positioned inside the housing 180 and has excellent light reflectance.

Is housed in the reflector 120 and the housing 180, and is arranged to surround the light source unit 130. [

Since the optical cover 140 is exposed below the illuminator, there is a possibility that dust or moisture may enter between the optical cover 140 and the housing 180. Accordingly, the optical cover 140 has a structure that is in close contact with the housing 180, and has a structure that is easily assembled with the housing 180.

The optical cover 140 covers at least the lower portion of the light source unit 130 and diffuses or converts the light emitted from the light source unit 130 into a plane light. The optical cover 140 is inserted into the opening 187 of the housing 180 in an insertion manner.

FIG. 6A is a perspective view of an optical cover according to an embodiment of the present invention, FIG. 6B is a top view of the optical cover according to an embodiment of the present invention, FIG. 6C is a cross- Sectional view.

6, the optical cover 140 has a shape corresponding to the opening 187 of the housing 180 and includes a diffusion plate 141 for diffusing light incident from the light source unit 130, A rim 142 disposed along the circumference of the rim 142 and adapted to be inserted into the opening 187 and a coupling hook 143 disposed in the rim 142 and fastened to the hook groove 188 formed in the housing 180 .

The diffusion plate 141 has a shape corresponding to the shape of the opening portion 187 as seen from below, and covers the opening portion 187. Specifically, the diffusion plate 141 has a circular shape when viewed from below. The diffusion plate 141 may have various structures for converting or diffusing light emitted from a point light source of the light source unit 130 into a surface light. This will be described later.

The coupling hook 143 is disposed in the rim 142 and is fastened to the hook groove 188 formed in the housing 180. Specifically, the coupling hook 143 has a structure in which it is inserted and hooked into the hook groove 188. In particular, in order to prevent the coupling hook 143 from being exposed to the outside of the lighting apparatus, the coupling hook 143 is formed protruding outward from the outer surface of the rim 142. The coupling hook 143 is disposed at a predetermined distance from the lower end of the rim 142 in the upward direction. The coupling hook 143 is preferably formed integrally with the rim 142.

The rim 142 is disposed along the periphery of the diffusion plate 141 and is inserted into the opening 187. Specifically, the rim 142 extends upward from the rim of the diffusion plate 141, and is disposed so as to surround the diffusion plate 141. The rim 142 and the diffusion plate 141 may be integrally formed.

The rim 142 is inserted into and closely contacted with the contact portion 184 of the housing 180. The rim 142 may be coupled to the tight junction 184 of the housing 180 in an interference fit or intermediate fit manner. When viewed from below, the rim 142 has a ring shape corresponding to the tight contact portion 184. The rim 142 may also be elastically deformed and interpolated to the opening 187.

The rim 142 is in face-to-face contact with the housing 180 defining the opening 187. Specifically, the outer surface of the rim 142 is in surface contact with the inner surface of the tight contact portion 184. Therefore, dust, moisture and the like flowing into the space between the rim 142 and the tightly fitting portion 184 can be cut off.

Preferably, the embodiment may further include a waterproof ring 170 that seals between the rim 142 and the housing 180. Specifically, the waterproof ring 170 is formed to correspond to the rim 142 in a ring shape, and is disposed between the upper end of the rim 142 and the lower surface of the step 183.

For example, the rim 142 is divided into a first region 141a forming the periphery of the coupling hook 143 and a second region 141b excluding the first region 141a.

If the rigidity of the rim 142 is too weak and the strain is too great, there is a problem that the tight contact portion 184 and the rim 142 are not in close contact with each other. If the rigidity of the rim 142 is too strong and the strain is too small, There is a problem that the engaging hook 143, which slides on the inner surface of the contact portion 184 and is engaged with the hook groove 188, can not be easily engaged.

Here, the strain will mean deformation in the state where the object is in response to the stress.

The embodiment is characterized in that the periphery of the coupling hook 143 in the rim 142 is such that the coupling hook 143 is pushed into the contact portion 184 and is easily inserted into the hook groove 188, So that the region other than the periphery of the coupling hook 143 has a small strain so that it is in complete contact with the rim 142 and tight contact portion 184.

The first region 141a will mean the region where the coupling hook 143 is located in the rim 142 and its periphery.

Specifically, the strain of the first region 141a is greater than the strain of the second region 141b. In addition, the elastic force of the first region 141a may be formed smaller than the elastic force of the second region 141b.

More specifically, the rim 142 may have various structures having different elastic forces and strains of the first region 141a and the second region 141b. For example, the first region 141a and the second region 141b of the rim 142 may be made of heterogeneous materials having different strains or / and elastic forces from each other. At this time, the rim 142 may be manufactured by a double injection method.

As another example, the rim 142 may have a structure in which the first region 141a and the second region 141b are made of the same kind of material and the first region 141a and the second region 141b have a strain or / Lt; / RTI >

4, the rim 142 of the embodiment is formed to be relatively smaller than the thickness d1 of the first region 141a and the thickness d2 of the second region 141b. Accordingly, the first region 141a is easily deformed in the coupling process of the coupling hook 143, and the coupling hook 143 is easily engaged. Further, the second area 141b is in surface contact with the adhered part 184 and brought into close contact with each other.

The ratio of the thickness d1 of the first region 141a to the thickness d2 of the second region 141b is preferably 0.2: 1 to 0.8: 1. If the thickness d1 of the first region 141a is too thin, it may not provide an elastic restoring force to the coupling hook 143. If the thickness d1 of the first region 141a is too thick, The fastening member 141a is not easily deformed, so that the fastening of the coupling hook 143 may not be easy.

The first region 141a may be formed by recessing a portion of the rim 142. The first region 141a may be formed to be embedded in the outer surface of the rim 142 or may be formed to be depressed from the inner surface of the rim 142 to the outside. Preferably, the first region 141a is formed by recessing the inner surface of the rim 142 to limit the adhesion of the outer surface of the rim 142 on which the first region 141a is formed to the adhered portion 184 .

In particular, referring to FIG. 6C, the first region 141a may have a total area on the rim 142 in the vertical direction (height direction), but preferably the height h1 of the first region 141a, Is smaller than the height (h2) of the rim (142). That is, the first region 141a is spaced apart from the lower end of the rim 142 and positioned above the rim 142. The rim 142 has a structure in which a first region 141a is disposed at an upper portion in a vertical direction and a second region 141b is disposed at a lower portion thereof. Accordingly, since the lower portion (second region 141b) of the rim 142 is in close contact with the tight contact portion 184, inflows from the outside can be limited.

6B, the first region 141a is repeated at a predetermined pitch along the circumference of the diffuser plate 141 at the rim 142. As shown in FIG. More specifically, the first region 141a forms a predetermined arc in the rim 142 forming the circumference of the diffusion plate 141 when viewed from above. At this time, the central angle S1 of the arc formed by each of the first regions 141a may be 5 degrees to 60 degrees. It is preferable that two to four first regions 141a are formed along the periphery of the diffusion plate 141.

The rim 142 may be made of a resin material having an elastic force. For example, the rim 142 may be made of at least one of PMMA (polymethylmethacrylate), acrylic resin, and polycarbonate.

7 is a cross-sectional view of a diffusion plate according to an embodiment of the present invention.

With reference to Fig. 7, an embodiment of the diffusion plate will be described.

The optical cover 140 includes a light guide sheet 11 that converts the light incident from the light source unit 130 into surface light and a light guide plate 11 that is positioned on the upper surface of the light guide sheet 11 and condenses and diffuses the light incident from the light guide sheet 11. [ The optical sheet 12 may be formed of a resin.

The light guide sheet 11 serves to guide the light incident from the light source unit 130. [ That is, it is possible to uniformize the brightness of the incident light, and convert incident light into surface light and provide the light to the optical sheet 12.

The light guide sheet 11 may be formed of, for example, polymethylmethacrylate (PMMA) or transparent acrylic resin in a flat type or wedge type and may be made of a glass material , And lenses made of a plastic material, but are not limited thereto.

The optical sheet 12 serves to condense and diffuse the surface light incident on the light guide sheet 11.

For example, the optical sheet 12 includes a diffusion film 13 for diffusing light incident from the light guide sheet 11 in one direction including diffusion particles such as beads, And a protective film 15 stacked on the top surface to protect the prism film 14 and the prism film 145 in which the prism pattern is formed to concentrate the light. However, the present invention is not limited thereto.

8 is a partial side view of an optical cover according to another embodiment of the present invention.

8, the optical cover 140A of another embodiment has no difference in thickness between the first area 141a and the second area 141b, and the elastic slit 144 is further formed There is a difference.

The rim 142 of another embodiment is formed of the same material as the first region 141a and the second region 141b and the first region 141a and the second region 141b have a strain or / The elastic slit 144 is disposed.

A pair of elastic slits 144 are disposed, and a coupling hook 143 is positioned between the pair of elastic slits 144. The pair of elastic slits 144 are disposed apart from each other in the first area 141a to define a boundary between the first area 141a and the second area 141b. The resilient slit 144 is formed through one region of the rim 142.

The elastic slits 144 may have a variety of arrangements. As shown in Fig. 8, the elastic slits 144 can be formed long in the vertical direction, and the pair of elastic slits 144 are arranged to be spaced laterally. At this time, in order to further improve the strain of the first region 141a, the upper portion of the elastic slit 144 may be opened. That is, the resilient slit 144 extends to the upper end of the rim 142.

A part of the first region 141a is separated from the rim 142 by the elastic slit 144 so that the second region 141b can be easily deformed by an external force.

9 is a partial side view of an optical cover according to another embodiment of the present invention.

8, the optical cover 140B of another embodiment is different from the embodiment of Fig. 8 in the arrangement of the elastic slits 144

In another embodiment, the pair of resilient slits 144 may be arranged laterally and horizontally and vertically.

Like reference numerals refer to like elements throughout the specification. The thickness and size of each layer in the drawings are exaggerated, omitted, or schematically shown for convenience and clarity of explanation. Also, the size and area of each component do not entirely reflect actual size or area.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

100: Lighting equipment
110: Power supply case
180: Housing
140: Optical cover

Claims (11)

A diffusion plate having a shape corresponding to an opening of the housing and diffusing light incident from the light source unit,
A rim disposed along the periphery of the diffuser plate and adapted to be inserted into the opening,
And a coupling hook disposed in the rim and fastened to a hook groove formed in the housing,
Wherein the rim is divided into a first region forming a periphery of the coupling hook and a second region excluding the first region,
Wherein a strain of the first region is larger than a strain of the second region,
The elastic force of the first region is smaller than the elastic force of the second region,
Wherein the first region and the second region are made of different materials. The method according to claim 1,
And the rim is elastically deformed and inserted into the opening. delete delete 3. The method of claim 2,
Wherein the thickness of the first region is relatively smaller than the thickness of the second region. 6. The method of claim 5,
Wherein the height of the first region is smaller than the height of the rim. 6. The method of claim 5,
Wherein the ratio of the thickness of the first region to the thickness of the second region is 0.2: 1 to 0.8: 1. 6. The method of claim 5,
Wherein the first region is repeated at a predetermined pitch along the periphery of the diffuser plate at the rim. 6. The method of claim 5,
Further comprising a pair of elastic slits spaced apart from each other in the first region and formed through the rim,
And the coupling hook is positioned between the pair of elastic slits. 6. The method of claim 5,
Wherein the rim and the housing defining the opening are in face-to-face contact with each other. A light source unit for generating light;
A housing accommodating the light source unit therein, the housing having an opening;
And an optical cover which covers the light source unit and is inserted in an opening of the housing and diffuses the light generated in the light source unit,
The optical cover includes:
A diffusion plate having a shape corresponding to an opening of the housing and diffusing light incident from the light source unit;
A rim disposed along the periphery of the diffuser plate and adapted to be inserted into the opening,
And a coupling hook disposed in the rim and fastened to a hook groove formed in the housing,
Wherein the rim is divided into a first region forming a periphery of the coupling hook and a second region excluding the first region,
Wherein a strain of the first region is greater than a strain of the second region,
The elastic force of the first region is smaller than the elastic force of the second region,
Wherein the first region and the second region are made of different materials.

KR1020150064312A 2015-05-08 2015-05-08 Optic cover and lighting device having same KR101729011B1 (en)

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KR101729011B1 true KR101729011B1 (en) 2017-04-21

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