KR102515714B1 - Anti-glare lighting and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an anti-glare lighting and a method for manufacturing the same, comprising: a plate having an attachment portion attached to a ceiling formed on an upper surface; a substrate attached to the lower surface of the plate and equipped with an LED on the lower surface; a diffuser attached to a bottom surface of the substrate, having a coupling hole into which the LED is inserted, and a reflector having an inclined surface formed on an inner circumferential surface of a diffuser having a width extending toward the bottom; a light transmitting panel attached to a lower surface of the diffuser; a louver attached to the lower surface of the light-transmissive panel, having a light-receiving groove formed corresponding to the reflector, and having a grid-shaped partition wall; a coupling pin penetrating the partition wall of the louver and coupling the light transmitting panel, the diffuser, the substrate, and the plate together so as to be integral; It is configured to include; a frame portion composed of a side frame that is in close contact with the side end of the plate to form an edge and a corner frame that is coupled to the corner portion of a plurality of adjacent side frames.
According to this, a diffuser disposed between the light source and the louver and having a high-efficiency reflector is provided to prevent light loss to increase illuminance, and various efficiency values can be adjusted using the replaceable diffuser.

Description

Anti-glare lighting and manufacturing method thereof {Anti-glare lighting and manufacturing method thereof}

The present invention relates to an anti-glare lighting and a method for manufacturing the same, which blocks light directly irradiated to the eyes so as to prevent glare from the lighting indoors, and refracts the light so that the entire amount is irradiated only downward, thereby significantly improving illuminance. It relates to an anti-glare lighting that can reduce eye fatigue and a manufacturing method thereof.

A fluorescent lamp consists of a glass tube filled with a mixture of argon and mercury vapor, and when current flows between the ionized gases between the metal electrodes at both ends, a significant amount of ultraviolet light is emitted while emitting light. To absorb this, the inside of the glass tube absorbs the ultraviolet light. It is coated with a phosphor that emits light and a fluorescent material that re-emits ultraviolet energy as visible light.

The light of a fluorescent lamp has a very strong glare, so when looking straight at it for a long time, it has a significant effect on deteriorating eyesight.

Therefore, when exposed to these ultraviolet rays for a long time, a yellowing phenomenon occurs in pictures, wallpaper, and painted parts installed indoors, so that considerable attention must be paid.

When installing a fluorescent light fixture as a means to prevent glare, a louver plate equipped with a plurality of louvers in a lattice form is installed below the fluorescent light fixture, and if you look at the louver-type fluorescent light fixture installed on the ceiling from the side out of a predetermined angle, it is covered by the lower loubar. The glare is prevented by preventing the fluorescent lamp inside from being directly visible.

On the other hand, the conventional lighting lamp has a strong glare even when a lampshade is combined with a fluorescent lamp and a louver is used at the bottom, which is inconvenient. In other words, there was a disadvantage that the glaze was high.

In addition, since the louver is manufactured by injection molding, it is thick and expensive, so there is a limit to popular spread.

Republic of Korea Patent Application No. 10-2014-0095896

The present invention has been devised to solve the problems of the prior art, by providing a diffuser between the light source and the louver to prevent light loss to increase illuminance, and to set the glaze index low so as not to interfere with the human viewing angle, It is an object of the present invention to provide an anti-glare lighting lamp and a method for manufacturing the same, in which replacement of a diffuser is easy and can be applied to both a hanging or rail-type lighting lamp.

The above object of the present invention, in the light attached to the ceiling, the plate attached to the ceiling is formed on the upper surface; a substrate attached to the lower surface of the plate and equipped with an LED on the lower surface; a diffuser attached to a bottom surface of the substrate, having a coupling hole into which the LED is inserted, and a reflector having an inclined surface formed on an inner circumferential surface of a diffuser having a width extending toward the bottom; a light transmitting panel attached to a lower surface of the diffuser; a louver attached to the lower surface of the light-transmissive panel, having a light-receiving groove formed corresponding to the reflector, and having a grid-shaped partition wall; a coupling pin penetrating the partition wall of the louver and coupling the light transmitting panel, the diffuser, the substrate, and the plate together so as to be integral; It can be achieved by an anti-glare lighting including; a frame portion composed of a side frame that is in close contact with the side end of the plate to form an edge and a corner frame that is coupled to the corner of a plurality of adjacent side frames.

The diffuser is characterized in that a coating film is formed so that the reflection performance can be exhibited on the inclined surface.

The diffuser is characterized in that it is provided in various shapes and colors.

The reflector is composed of a horizontal portion closely adhered to the substrate and formed with a through hole into which an LED is inserted, and an inclined surface connected to the outer periphery of the horizontal portion and formed to be inclined downward. It is characterized in that the light is not leaked into the space between the panel and the substrate and is emitted only within the reflector.

It is characterized in that the angle (θ1) between the horizontal portion and the inclined surface is 130 to 150 °.

The reflector of the diffuser is formed with the width of the upper and lower light, and the width of the opening of the reflector is set so that the dispersion angle (θ2) of the light emitted from the LED is 90 to 110 °.

The louver is characterized in that the light receiving groove is disposed under the reflector of the diffuser so that the light emitted from the reflector is concentrated into the light receiving groove and irradiated downward in a right angle direction.

On the other hand, according to another embodiment, in the manufacturing method of the lighting attached to the ceiling, one step of assembling the frame portion by connecting a plurality of side frames and corner frames to corners of the plurality of side frames; Step 2 of assembling by fastening a piece by placing a plate on the upper surface of the substrate after seating the substrate so as to span the edge of the inner step of the frame unit; Step 3 of attaching the diffuser to the lower surface of the substrate and fixing it by fastening the diffuser so that the LED is inserted into the through-hole formed in the reflector of the diffuser to be inserted into the reflector to block leakage of light; Step 4 of attaching the light transmission panel to the lower part of the diffuser; Step 5 of attaching the louver to the lower part of the transparent panel so that the light receiving groove of the louver corresponds to the reflector of the diffuser; It can be achieved by a method of manufacturing a lighting lamp comprising a; step 6 of inserting a pin into the pinhole formed in the partition wall of the louver in step 5 to penetrate and couple the diffuser, the substrate and the plate to be integrated.

The louver in the 4th process puts and fixes the flat material in the processing frame, presses a jig from the upper part of the material and drills it so that the light receiving groove and the partition wall are formed at the same time, and a pinhole is formed by penetrating the partition wall. characterized by being

The diffuser is formed in a flat plate shape, and a reflection part is formed by pressing a part of the diffuser so that it protrudes, and an inclined surface on which a reflection coating layer is formed is formed inside the reflection part.

According to the present invention, a diffuser disposed between the light source and the louver and having a high-efficiency reflector is provided to prevent light loss to increase illuminance, and various efficiency values can be adjusted using a replaceable diffuser.

Depending on the place of use and the environment, three multi-purpose color changeable louvers can be provided.

Direct mount type and pendant type that can be fixed to the ceiling. It can be used for various purposes such as rail type.

Dimming (3000-5600K) is possible, and the desired color can be adjusted directly with the remote control.

As a wireless switch built-in option, no separate wiring work is required. It can be turned off (controls up to 99 units with one remote control).

1 is a perspective view showing an anti-glare lighting lamp according to the present invention;
2 is an exploded perspective view showing an anti-glare lighting lamp according to the present invention;
3 is a cross-sectional perspective view showing an anti-glare lighting lamp according to the present invention;
Figure 4 is an enlarged cross-sectional view of the main part in Figure 3;
5 is a perspective view showing a 'Luba' of an anti-glare lighting according to the present invention;
6 is a perspective view showing a 'diffuser' of an anti-glare lighting according to the present invention;
7 is a partially enlarged cross-sectional view showing the coupling structure of the 'side frame' of the anti-glare lighting according to the present invention;
8 is a perspective view of a 'corner frame' of an anti-glare lighting lamp according to the present invention;
9 is a cross-sectional view of a 'corner frame' of an anti-glare lighting lamp according to the present invention;
10 is a flowchart showing a manufacturing process of an anti-glare lighting according to the present invention;
11 to 15 are views sequentially showing the manufacturing process of the anti-glare lighting according to the present invention,
16 is a perspective view showing a bar-shaped anti-glare lighting lamp according to another embodiment of the present invention;
Figure 17 is a photograph of a use example in which the lighting of Figure 16 is installed.

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

Since various changes can be made to the embodiments, the scope of rights of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents or substitutes to the embodiments are included in the scope of rights.

The anti-glare lighting according to the present invention can reduce glare.

Glare refers to a state in which it is difficult to see an object due to a high-luminance light source or light of a reflective object within the field of view, or a state in which discomfort is felt due to glare.

There are three types of glare: Disability Glare, Discomfort Glare, Veiling Reflection, and Reflection Glare.

Glare tends to occur within the field of view within 45° from the line of sight, and this range is called the glare zone.

Disability glare is glare that momentarily loses visual function or reduces eyesight when an extremely bright light source, such as a car headlight, enters the field of vision.

Discomfort glare is glare that does not interfere with seeing an object, but causes discomfort, reduced work efficiency, and eye fatigue due to a high-brightness light source in the field of view.

Veiling Reflection and reflective glare are glare that makes objects difficult to see when light from a light source or window with high luminance is reflected on the surface of a monitor, desk surface, or glossy paper and enters the field of vision.

As a way to control the glare, a translucent diffusion plate, a prism panel, a light shield, or a louver is used.

ISO and EN standards use the UGR presented by CIE as a default.

The value obtained by the UGR formula is called the glare index and is used as an index to evaluate unpleasant glare.

The UGR formula is:

In the disclosed invention, it is possible to prevent discomfort by reducing the glare zone.

Since the glare zone occurs within the field of view within 45 degrees from the line of sight, we tried to reduce it.

The UGR ratings are shown in [Table 1].

Rating degree 10 Imperceptible 16 Perceptible 19 Acceptable (Just Acceptable) 22 Unacceptable 25 Just Uncomfortable 28 Uncomfortable 31 Unbearable (Just intolerable)

Generally, 19 is appropriate for the UGR standard, and is indicated as UGR=19. For most offices, UGR 16-19 is adequate.

Among the accompanying drawings, Figure 1 is a perspective view showing an anti-glare lighting according to the present invention, Figure 2 is an exploded perspective view showing an anti-glare lighting according to the present invention, Figure 3 is a cross-sectional perspective view showing an anti-glare lighting according to the present invention, 4 is an enlarged cross-sectional view of the main part in FIG. 3, FIG. 5 is a perspective view showing the 'Luba' of the anti-glare lighting according to the present invention, Figure 6 is a perspective view showing the 'diffuser' of the anti-glare lighting according to the present invention, Figure 7 is this A partially enlarged cross-sectional view showing the coupling structure of the 'side frame' of the anti-glare lighting lamp according to the present invention, Figure 8 is a perspective view of the 'corner frame' of the anti-glare lighting lamp according to the present invention, Figure 9 is an anti-glare lighting lamp according to the present invention A cross-sectional view of the 'corner frame', Figure 10 is a flow chart showing the manufacturing process of the anti-glare lighting according to the present invention, Figures 11 to 15 are views sequentially showing the manufacturing process of the anti-glare lighting according to the present invention, Figure 16 is A perspective view showing a bar-shaped anti-glare lighting lamp according to another embodiment of the present invention, and FIG. 17 is a photograph of a usage example in which the lighting lamp of FIG. 16 is installed.

As shown in Figures 1 to 8, the anti-glare lighting (A) according to the present invention,
Plate 2 having an upper surface with an attachment part 22 attached to the ceiling;
A substrate 3 attached to the lower surface of the plate 2 and equipped with an LED 32 on the lower surface;
Attached to the bottom surface of the substrate 3, the coupling hole into which the LED 32 is inserted is formed on the top, and the width expands toward the bottom, and the reflector 52 having an inclined surface 522 formed on the inner circumferential surface Diffuser 5;
a light transmitting panel 6 attached to the lower surface of the diffuser 5;
a louver 7 attached to the lower surface of the transparent panel 6, having a light receiving groove 70 corresponding to the reflecting part 52, and having a lattice-shaped partition wall 72;
Coupling pins 8 penetrating the partition wall 72 of the louver 7 and combining the light transmitting panel 6, the diffuser 5, the substrate 3, and the plate 2 to be integral;
A frame portion 4 composed of a side frame 42 that is in close contact with the side end of the plate 2 to form a border and a corner frame 44 coupled to the corners of a plurality of adjacent side frames 42; It is composed of.

The plate 2 can be manufactured in various sizes and shapes as needed, and is made of a rectangular panel as an example.

Mounting bolts (not shown) pre-formed on the ceiling may pass through the attachment part 22 on the upper surface of the plate 2, and then nuts may be fastened and mounted at the lower part.

The substrate 3 includes a PCB (not shown) in which a plurality of LEDs 32 are planted, and the LEDs may emit light by supplying power through wires connected to the outside.

The diffuser 5 may be made of a synthetic resin material or a metal material, and a reflective part 52 is convexly formed on the upper part of the flat plate part, and the inside of the reflective part 52 is concavely recessed.

The reflector 52 is closely attached to the substrate 3 and has a horizontal portion 521 formed with a through hole 520 into which the LED 32 is inserted, and an inclined surface formed following the outer periphery of the horizontal portion 521 and inclined downward ( 522).

The LED 32 is inserted through the through hole 520 and coupled to be accommodated in the reflector 52 so that light does not leak into the space between the light transmitting panel 6 and the substrate 3, and only within the reflector 52. to be investigated

Preferably, the angle θ1 between the horizontal portion 521 of the reflecting portion 52 and the inclined surface 522 is 130° to 150° (see FIG. 4 ).

If the angle θ1 is 130° or less, the irradiation range becomes narrow, and if it is 150° or more, there is a possibility that it may become excessive.

In addition, the reflector 52 of the diffuser 5 is formed with the width of the upper and lower light, and the width of the opening of the reflector 52 is such that the dispersion angle θ2 of the light emitted from the LED 32 is 90 to 110 °. It is desirable that the length be set.

If the light dispersion angle θ2 is 90° or less, the irradiation range becomes narrow, and if it is 110° or more, it may become excessive.

A coating film may be formed on the inclined surface 522 so that reflective performance can be exhibited. The coating film may be formed by depositing a separate coating agent, or may be realized by the gloss of the material itself.

The diffuser 5 may be provided in various shapes and colors. In the present invention, the diffuser of various colors can be selected as needed.

In the louver 7, the light receiving groove 70 is disposed below the reflector 52 of the diffuser 5 so that the light emitted from the reflector 52 is concentrated into the light receiving groove 70 and is perpendicular only downward. direction can be investigated.

A transmission hole 702 is formed to communicate with the light receiving groove 70, and the transmission hole 702 is disposed to communicate with the opening of the reflector 52 so that the light emitted from the reflector 52 passes through the transmission hole. It may be irradiated into the light receiving groove 70 .

Therefore, the light of the LED 32 is dispersed and emitted downward in the entire amount in the reflector 52,

The emitted light is generally emitted only downward through the light receiving groove 70 .

Therefore, since light does not leak at all from the side, the glare index can be lowered, and discomfort can be eliminated.

The frame part 4 includes a plurality of side frames 42 that are in close contact with the side end of the plate 2 to form an edge, and a corner frame 44 coupled to the corner of the plurality of side frames 42 adjacent to each other. It consists of

As shown in Figures 3, 5 and 7, the side frame 42 is formed with a step on the inside, so that the ends of the substrate 3 and the plate 2 can be seated across, and a plurality of steps on the step. A coupling groove 424 is formed, and a fitting groove 425 is formed on the inside so that the end of the plate 2 is coupled.

The bent end 24 formed at the end of the plate 2 is fitted into the fitting groove 425, and a plurality of fitting grooves 425 are formed so that the bent end 24 of the plate 2 has a plurality of fitting grooves ( 425) can be selectively coupled to any one of them so that the fitting position of the side frame 42 can be adjusted according to the size of the plate 2.

The corner frame 44 is formed at right angles, and fitting ends 43 are formed so that the side frames 42 are coupled to each side, and the fitting ends 43 are formed with fitting jaws 432 inclined upward toward the inside. .

As shown in Figure 7, the fitting end 43 is formed to have a step (t) by being formed horizontally from the beginning to be fitted, and then the fitting jaw 432 is gradually formed inclined upward.

Therefore, when the fitting jaw 432 is fitted into the fitting groove 425 of the side frame 42, due to the thickness increase by the step (t), it can be firmly coupled to the fitting groove 425 and the fitting groove 425 with an interference fit, which is arbitrarily separated. this can be prevented.

Meanwhile, referring to FIGS. 10 to 15, the manufacturing process of the anti-glare lighting according to the present invention will be described as follows.

Looking at the manufacturing method of the anti-glare lighting according to the present invention,

Step 1 (S1)

Referring to FIGS. 10 and 11 , the frame unit 4 is assembled by connecting a plurality of side frames 42 and corner frames 44 to corners of the plurality of side frames 42 .

2nd process (S2)

After mounting the substrate 3 on the inner step of the frame portion 4 so as to span the edge, the plate 2 is placed on the upper surface of the substrate 3 and assembled by fastening the pieces.

3rd process (S3)

The diffuser 5 is adhered to the lower surface of the substrate 3 and fixed by fastening the piece P1, so that the LED 32 is inserted into the through hole formed in the reflector 52 of the diffuser 5 to form a reflector 52 ) to block light leakage.

4th process (S4)

The light transmission panel 6 is closely attached to the lower part of the diffuser 5. The diffuser 5 is formed in a flat plate shape, and a part of the diffuser 5 is pressed and protruded so that a reflection part 52 is formed, and an inclined surface 522 on which a reflection coating layer is formed is formed on the inside of the reflection part 52.

5th process (S5)

The louver 7 is brought into close contact with the lower part of the transparent panel 6 so that the light receiving groove 70 of the louver 7 corresponds to the reflector 52 of the diffuser 5.

The louver 7 puts and fixes a flat material in a processing frame, presses a jig from the upper part of the material and drills it so that the light receiving groove 70 and the partition wall 72 are formed at the same time, and the partition wall 72 ) through which a pinhole is formed.

6th process (S6)

Insert the pin 8 into the pinhole formed in the partition wall 72 of the louver 7 in step 5 (S5) to penetrate and couple the diffuser 5, the substrate 3, and the plate 2 so that they are integrated. .

14 and 15, a plurality of diffusers 5, light transmitting panels 6 and louvers 7 are attached to the lower surface of the substrate 3.

16 is a perspective view showing a bar-shaped anti-glare lighting lamp (A′) according to another embodiment of the present invention, and FIG. 17 is a photograph showing an example in which the lighting lamp (A′) of FIG. 16 is installed.

As shown in Figures 16 and 17, the anti-glare lighting (A') according to another embodiment of the present invention is formed in a long bar shape.

As shown in the photograph, the lighting lamp (A′) of the present invention looks dark, so it can be seen that the glare index is lowered, so that discomfort can be eliminated.

On the other hand, since only the chairs disposed in the lower lighting zone of the lamp A' of the present invention are illuminated, it can be seen that there is no inconvenience to the lower seated persons.

The present invention is not limited by the above-described embodiments and the accompanying drawings, and various modifications and applications not exemplified within the scope of the technical idea of the present invention are possible, as well as substitution of components and equivalent other embodiments. Since it can be changed, the content related to the modification and application of the features of the present invention should be construed as being included within the scope of the present invention.

2: plate 3: substrate
4: frame part 5: diffuser
6: light panel 7: louver
8: coupling pin 22: attachment
32: LED 42: side frame
44: corner frame 52: reflector
70: light receiving groove 72: partition wall
S1: Step 1 S2: Step 2
S3: 3 process S4: 4 process
S5: 5th process S6: 6th process

Claims (6)

In the lighting attached to the ceiling,
A plate attached to the ceiling formed on an upper surface of the plate;
a substrate attached to the lower surface of the plate and equipped with an LED on the lower surface;
a diffuser attached to a bottom surface of the substrate, having a coupling hole into which the LED is inserted, and a reflector having an inclined surface formed on an inner circumferential surface of a diffuser having a width extending toward the bottom;
a light transmitting panel attached to a lower surface of the diffuser;
a louver attached to the lower surface of the light-transmissive panel, having a light-receiving groove formed corresponding to the reflector, and having a grid-shaped partition wall;
a coupling pin penetrating the partition wall of the louver and coupling the light transmitting panel, the diffuser, the substrate, and the plate together so as to be integral;
A frame portion composed of a side frame in close contact with the side end of the plate to form an edge and a corner frame coupled to the corner portions of a plurality of adjacent side frames;
The diffuser is formed with a coating film so that the reflection performance can be exhibited on the inclined surface,
The reflective part is composed of a horizontal part in close contact with the substrate and formed with a through hole into which an LED is inserted, and an inclined surface formed following the outer periphery of the horizontal part and inclined downward,
The LED is inserted through the through hole and coupled to be accommodated in the reflector so that light does not leak into the space between the light transmitting panel and the substrate and is emitted only within the reflector,
The angle θ1 between the horizontal portion and the inclined surface is 130 to 150 °,
The reflector of the diffuser is formed with the width of the upper and lower light, and the width of the opening of the reflector is set so that the dispersion angle (θ2) of the light emitted from the LED is 90 to 110 °,
The side frame,
A step is formed on the inside so that the ends of the substrate and the plate can be seated across, a plurality of fastening grooves are formed on the step, and a fitting groove is formed on the inside so that the end of the plate is coupled,
The bent end formed at the end of the plate is fitted into the fitting groove,
A plurality of the fitting grooves are formed so that the bent end of the plate can be selectively coupled to any one of the plurality of fitting grooves so that the fitting position of the side frame can be adjusted according to the size of the plate,
The corner frame,
It is formed at a right angle, and fitting ends are formed so that the side frames are coupled to each side, and the fitting ends are formed with fitting jaws inclined upward toward the inside,
The fitting end is formed horizontally from the beginning end to be fitted, and then the fitting jaw is gradually formed to incline upward to have a step difference,
Anti-glare lighting, characterized in that when the fitting jaw is fitted into the fitting groove of the side frame, it can be firmly coupled with the fitting groove and the interference fit due to the thickness increase by the step, and the separation can be prevented. delete According to claim 1,
The louver is an anti-glare lamp, characterized in that the light receiving groove is disposed below the reflector of the diffuser so that the light emitted from the reflector is concentrated into the light receiving groove and irradiated downward in a right angle direction. A method of manufacturing a lighting fixture attached to a ceiling, comprising: a first step of assembling a frame part by connecting a plurality of side frames and corner frames to corners of the plurality of side frames;
Step 2 of assembling by fastening a piece by placing a plate on the upper surface of the substrate after seating the substrate so as to span the edge of the inner step of the frame unit;
Step 3 of attaching the diffuser to the lower surface of the substrate and fixing it by fastening the diffuser so that the LED is inserted into the through-hole formed in the reflector of the diffuser to be inserted into the reflector to block leakage of light;
Step 4 of attaching the light transmitting panel to the lower part of the diffuser of Step 3;
Step 5 of attaching the louver to the lower part of the transparent panel so that the light receiving groove of the louver corresponds to the reflector of the diffuser;
It includes a 6th step of inserting a pin into a pinhole formed in the partition wall of the louver in the 5th step to penetrate and couple the diffuser, the substrate and the plate to be integrated,
The diffuser in the second step is formed in a flat plate shape, but a reflection part is formed by pressing a part of the diffuser so that it protrudes, and an inclined surface on which a reflection coating layer is formed is formed inside the reflection part,
The side frame of the first step,
A step is formed on the inside so that the ends of the substrate and the plate can be seated across, a plurality of fastening grooves are formed on the step, and a fitting groove is formed on the inside so that the end of the plate is coupled,
The bent end formed at the end of the plate is fitted into the fitting groove,
A plurality of the fitting grooves are formed so that the bent end of the plate can be selectively coupled to any one of the plurality of fitting grooves so that the fitting position of the side frame can be adjusted according to the size of the plate,
The corner frame of the first step,
It is formed at a right angle, and fitting ends are formed so that the side frames are coupled to each side, and the fitting ends are formed with fitting jaws inclined upward toward the inside,
The fitting end is formed horizontally from the beginning end to be fitted, and then the fitting jaw is gradually formed to incline upward to have a step difference,
When the fitting jaw is fitted into the fitting groove of the side frame, due to the increase in thickness by the step, it can be firmly coupled with the fitting groove and the interference fit, and manufacturing method of anti-glare lighting, characterized in that to prevent separation. delete According to claim 4,
In the 4th process, the flat material is put into a processing mold and fixed, and then a jig is pressed from the top of the material to form a light receiving groove and a partition wall at the same time,
Method of manufacturing an anti-glare lighting, characterized in that the pinhole is formed through the partition wall.

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