KR20170045062A - Outplate for home appliance and manufacture method thereof - Google Patents

Abstract

The present invention relates to an outer member for home appliances, and a method for manufacturing the same. A plurality of through-holes penetrating a remaining portion except a color layer are formed in an outer member made of a color steel sheet to enable light to transmit the same to enable a display unit to be expressed to the outside when an LED is turned on, and the displayed is covered by a color layer to prevent the display unit and the through-holes forming the display unit from being unseen when the LED is turned off.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an outer member for home appliances,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an exterior member for a home appliance and a method of manufacturing the same.

Generally, household appliances are provided with a display assembly for indicating the operating state of household appliances. The display assembly may display various information according to the operation of the household appliance in the form of numbers, letters, symbols, or pictures.

Accordingly, the user can check the information output through the display assembly to determine the operation state of the household appliances, and operate the appliance for operation.

In recent household appliances, an exterior member made of a metal material is used to make the appearance more luxurious, or an exterior member made of a material coated with a steel material such as steel to make the exterior appearance is used. So that the operation of the appliance can be indicated.

Korean Patent Laid-Open Publication No. 10-2014-0121753 discloses a refrigerator having a display unit on a rear surface of a metal front plate of a refrigerator door and a display unit of the display unit through a through- A refrigerator is disclosed. The through-hole is formed through etching or laser drilling so as to be formed into a minute size.

However, even if the hole is processed to a small size, the through hole can be identified to the outside. In particular, when the display portion is viewed closely, the through hole that does not allow the light to pass through is visible.

Particularly, even if a hole is machined with a small size, a variation in hole size may occur, and there is a problem that user's dissatisfaction may be caused due to the deviation of the hole size.

In addition, even if the hole filling process is performed inside the through-hole, a concavo-convex shape may be formed on the front surface portion, so that there is a problem that foreign substances may be adhered or contaminated.

In an embodiment of the present invention, a plurality of through holes passing through a lid portion except a color layer are formed in an exterior member formed of a color steel plate so that when the LED is lit, light is transmitted and the display portion is expressed outside, And an exterior member for a household appliance which is shielded by the color layer so that the display portion and the plurality of through holes constituting the display portion are not seen when the exterior is turned off, and a manufacturing method thereof.

The embodiment of the present invention can improve the productivity by forming the through hole by etching only the part corresponding to the through hole in the back coating layer of the color steel sheet and etching the removed area, and a manufacturing method thereof The purpose is to provide.

An exterior member for household appliances according to an embodiment of the present invention covers a display assembly including a plurality of LEDs, and includes a color layer forming a color and a texture of the appliance, and a back coating layer for preventing corrosion formed on the front surface and the back surface Color steel plate; A plurality of first through holes formed at positions corresponding to positions corresponding to the plurality of LEDs and recessed from the back surface of the color steel sheet to the color layer; And a hole filling member which is formed to fill each of the plurality of first through holes and through which the light of the LED is transmitted, wherein the plurality of first through holes transmit light when the LED is lit A display unit for displaying information on the operation of the refrigerator from the outside is formed and the first through hole is covered by the color layer when the LED is turned off.

The colored steel sheet is characterized by being a VMC steel sheet or a SiC steel sheet.

And the back coating layer is removed in a corresponding size at a position corresponding to each of the plurality of first through-holes.

And the back coating layer is removed by an area of a size including all of the plurality of first penetrations.

And the hole filling member is formed so as to cover all portions of the back surface of the color steel sheet where the back coating layer is removed.

The color layer may be formed of a film type or formed by painting or coating a paint.

And the first through-hole is etched using ferric chloride.

And the hole filling member is formed on the back surface of the color steel sheet by a screen printing method.

A method of manufacturing an outer casing member for a household appliance according to an embodiment of the present invention includes: a step of receiving a color steel plate forming an outer appearance of a household appliance [S110]; Removing the back coating layer on the back surface of the color steel sheet by laser with a region corresponding to the display portion [S120]; Laminating a photosensitive resin film on the surface of the base metal layer exposed on the color steel sheet from which the back coating layer has been removed [S130]; A step S140 of arranging a masking film designed to form a hole at a position corresponding to a position where the first through-hole is formed, and then curing the photosensitive resin film by irradiating ultraviolet rays; Removing the remaining portion of the photosensitive resin film except the cured portion by dissolving in a developing solution [S150]; Etching the base metal layer corresponding to the position of the first through-hole leaving the color layer of the color steel sheet by spraying an etchant to etch the first through-hole; And forming a hole filling member to support the color layer with a material capable of transmitting light through the first through hole [S170].

Wherein the hole filling member is formed to cover the entire area of the display portion from which the back coating layer is removed.

In addition, a method of manufacturing an outer casing member for household appliances according to an embodiment of the present invention includes the steps of: [S210] receiving a color steel plate forming an outer appearance of an appliance; Removing the back coating layer on the back surface of the color steel sheet by a laser by a distance corresponding to each of the plurality of first through holes by the size of the first through hole [S220]; Etching the first through hole by etching the base metal layer corresponding to the position of the first through hole leaving the color layer of the color steel sheet by spraying the etching solution [S230]; And forming a hole filling member to support the color layer with a material capable of transmitting light through the first through hole [S240].

According to the outer member for household appliances and the method of manufacturing the same according to the embodiment of the present invention, the following effects can be expected.

First, the exterior member according to the embodiment of the present invention has a structure in which the first through hole is shielded by the color layer forming the front surface of the color steel sheet. According to the structural features of the color layer, light may pass through the LED when the LED is turned on, and the display unit may be exposed to the outside. When the LED is turned off, the first through hole is not exposed to the outside. Accordingly, when the LED is turned off, the first through-hole is not visible on the front surface of the exterior member, thereby improving the appearance and realizing a luxurious appearance.

Secondly, an etchant of a ferric oxide component capable of reacting with the base metal of the color steel sheet is used in forming the first through hole. Therefore, the first through-hole can be easily formed by etching after the back coating layer is removed. At this time, the first through-hole can be formed while preventing damage to the color layer shielding the first through-hole .

Fourth, the color steel sheet may be a VMC steel sheet or a SiC steel sheet, and the first through hole may be formed by a simple method by removing the back coating on the color steel sheet supplied as the finished product, There is an advantage that it can be saved.

Fifth, the back coat layer removed during the formation of the first through holes can be covered with the hole filling member filling the first through holes, thereby preventing the corrosion of the color steel sheet, and at the same time, the effect of supporting the color layer can be expected It is possible.

Sixth, when forming the first through hole, the back coating layer may be formed by laser marking to have a size corresponding to the size of the first through hole, and the back coating layer may be removed using an etching solution of a ferric oxide component that reacts with the base metal So that the first through hole can be formed in the exposed base mask layer.

At this time, the back coating layer serves as a mask for etching, and therefore it is unnecessary to perform an operation such as a separate film laminating process or development for etching, so that workability and productivity are remarkably improved and manufacturing cost can be greatly reduced The effect can be expected.

1 is a front view of a refrigerator according to an embodiment of the present invention.
2 is a perspective view of a display unit of a refrigerator door according to an embodiment of the present invention.
3 is a rear view of the refrigerator door.
Fig. 4 is an exploded perspective view of the color steel plate constituting the front panel of the refrigerator door. Fig.
5 is a sectional view of the color layer of the color steel sheet.
6 is a cross-sectional view of another color layer of the color steel sheet.
7 is a cutaway perspective view of another color steel plate constituting the front panel of the refrigerator door.
8 is a sectional view taken along the line 8-8 'in Fig.
9 is an exploded perspective view showing a mounting structure of the display assembly of the refrigerator door.
10 is an exploded perspective view illustrating a front panel of the refrigerator door.
11 is an exploded perspective view showing a combined structure of a touch sensor assembly, a display cover, a display assembly, a frame display, and a frame according to an embodiment of the present invention.
12 is a sectional view taken along the line 12-12 'of FIG.
13 is an enlarged view of part A of Fig.
Fig. 14 is a diagram showing the state of the display unit according to the embodiment of the present invention. Fig.
15 is a flowchart sequentially showing a method for manufacturing an exterior member according to an embodiment of the present invention.
16 is a schematic view schematically showing a manufacturing process of the exterior member.
17 is a flowchart sequentially showing a method of molding a hole filling member in a first through-hole of the exterior member.
18 is a schematic view schematically showing a process of printing and molding a hole filling member in the first through-hole.
FIG. 19 is a detailed view illustrating a screen printing process performed on a back surface of a front panel according to an embodiment of the present invention.
20 is an enlarged view showing the relationship between the mesh of the plate making and the first through-hole for the screen printing.
21 is a flowchart sequentially illustrating a method of manufacturing an armoring member according to another embodiment of the present invention.
22 is a schematic view schematically showing a manufacturing process of the exterior member.
23 is an exploded perspective view of an air conditioner provided with a covering member on which a display unit according to an embodiment of the present invention is formed.
24 is an exploded perspective view of a washing machine provided with a covering member on which a display unit is formed according to an embodiment of the present invention.
25 is an exploded perspective view of a dishwasher provided with a covering member having a display unit according to an embodiment of the present invention.
26 is an exploded perspective view of a cooking apparatus provided with an exterior member on which a display unit according to an embodiment of the present invention is formed.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, it should be understood that the present invention is not limited to the embodiment shown in the drawings, and that other embodiments falling within the spirit and scope of the present invention may be easily devised by adding, .

In particular, embodiments of the present invention will be described by way of example in which a display assembly is mounted on a door of a refrigerator for convenience of explanation and understanding, and the present invention is characterized in that a plurality of micro- The present invention is applicable to household appliances including all types of refrigerators capable of displaying an operating state by a combination of through holes.

1 is a front view of a refrigerator according to an embodiment of the present invention.

As shown in the figure, the refrigerator 1 according to the embodiment of the present invention may be shaped by a cabinet forming a storage space and a refrigerator door 10 installed in the cabinet to open and close the storage space.

The storage space may be divided into left and right sides and / or upper and lower sides, and a plurality of refrigerator doors 10 may be provided on the opened front of the storage space to open and close the respective spaces. The refrigerator door (10) is configured to open or close the storage space by sliding or rotating, and is configured to form a front surface of the refrigerator (1) in a closed state.

The display unit 11 and the touch operation unit 12 are provided on the refrigerator door 10 on one side of the plurality of refrigerator doors 10 at a height that facilitates user's operation and identification.

The display unit 11 is for displaying the operating state of the refrigerator 1 to the outside and is configured to be displayed as a symbol or number while light irradiated from the inside of the refrigerator door 10 is transmitted, This allows you to check the operation information of the refrigerator.

When light is not irradiated inside the refrigerator door 10, the display unit 11 does not appear as shown in FIG. When no light is irradiated inside the refrigerator door 10, the refrigerator door 10 has an appearance that it is not provided with a structure for displaying the same information as the display unit 11. [

The touch operation unit 12 is provided on a part of the front surface of the refrigerator door 10 as a part for a user to perform a touch operation for the operation of the refrigerator 1 and a portion where the pressing operation can be sensed is printed, Can be displayed by the same method as surface processing.

Of course, the touch operation unit 12 may be provided on the refrigerator door 10 other than the refrigerator door 10 having the display unit 11 among the plurality of refrigerator doors 10, and the refrigerator door 10 But may be provided on one side of the cabinet. If necessary, the touch operation unit 12 may be provided with a switch or a button operation unit other than the touch operation unit.

The touch operation unit 12 may be configured to have the same configuration as the display unit 11 so as not to be exposed to the outside when no light is irradiated inside the refrigerator door 10. [

2 is a perspective view of a display unit of a refrigerator door according to an embodiment of the present invention.

As shown in the drawing, the refrigerator door 10 is entirely formed with a front surface by a front panel 20. [ In the embodiment of the present invention, the front panel 20 is the same as the exterior member of the other embodiments, but is referred to as the front panel 20 for convenience of explanation.

The refrigerator door 10 includes a front panel 20 forming a front surface of the refrigerator door 10, a door liner 30 forming a rear outer surface of the refrigerator door 10, and a decor member 40 provided at the upper and lower ends of the refrigerator door 10 , 43), the overall appearance can be formed.

In more detail, the front panel 20 forms a front surface of the refrigerator door 10, and may be formed of a plate-shaped color steel plate. The front panel 20 may further include not only the entire front surface of the refrigerator door 10 but also a side portion of the refrigerator door 10. The color steel sheet forming the front panel 20 may be subjected to a fingerprint prevention process, a specific pattern or pattern may be expressed, and a hair line may be formed to have a metal texture.

The display unit 11 may be defined by a plurality of first through holes 21 formed in a part of the front panel 20. The display unit 11 may include a plurality of first through holes 21 punctured in a predetermined arrangement so as to indicate numbers or symbols. For example, the plurality of the first through-holes 21 may be arranged in a seven-segment shape, and may be arranged to indicate a specific symbol, a shape of a pattern, or a letter indicating the state of the refrigerator 1 .

The display unit 11 is formed to correspond to the arrangement of a plurality of second through holes 220 and third through holes 321 to be described below so that light emitted from the LED 313 of the display assembly 300 is transmitted Lt; / RTI >

That is, light may be irradiated through at least a part of the first through-holes 21 formed at a position corresponding to the position of the LED 313 to which the light is irradiated among the first through-holes 21, The first through-holes 21 to which the light is irradiated can be transmitted to the user by displaying a specific number or character shape.

The first through-hole 21 may be formed by etching the rear surface of the front panel 20. And the open front of the first through hole 21 is shielded by the surface of the colored steel sheet. Therefore, when the LED 313 is not illuminated, the first through hole 21 is shielded by the color layer 235 forming the surface of the color steel sheet and is not exposed to the outside, The first through hole 21 forming the display portion 11 and the display portion 11 can not be seen through the door 10. [

2, when at least a part of the LEDs 313 are lit, the first through-holes 21 corresponding to the LEDs 313, which are lighted among the plurality of first through-holes 21, Can be exposed to the outside while light is transmitted. At this time, the information can be expressed by a specific number (for example, 4, -12 as in FIG. 2) by the combination of the first through holes 21 exposed, and can be displayed as characters or pictures to transmit information to the user .

3 is a rear view of the refrigerator door. 4 is an exploded perspective view of the color steel plate constituting the front panel of the refrigerator door.

As shown in the figure, the front panel 20 is formed in a plate shape and can be bent so as to form at least a part of a side surface of the refrigerator door 10. [ Since the front panel 20 forms the outer surface of the refrigerator door 10, the front panel 20 can be formed to have a sufficient thickness to ensure sufficient strength.

A plurality of first through holes 21 may be formed in the display area 11 of the front panel 20. The first through hole 21 is formed to be recessed from the rear surface of the front panel 20 and has a shape passing through the remaining portion except the color layer 235 of the color steel sheet forming the front panel 20 As shown in FIG.

When the LED 313 of the display assembly 300 is not illuminated and the refrigerator door 10 side is viewed, the first through hole 21 is covered by the color layer 235, . Accordingly, the user can recognize that the entire front surface of the refrigerator door 10 is formed of a smooth steel plate without the same structure as the display.

The plurality of first through-holes 21 may be arranged so as to transmit information in the form of a specific letter or symbol when the LED 313 is lit, thereby forming the display unit 11. The overall shape of the display unit 11 appears differently depending on the LED 313 to be turned on. Therefore, the display unit 11 may be defined as representing the entire region where a plurality of the first through holes 21 are arranged.

On the other hand, a hole filling member 22 is formed on the back surface of the front panel 20. The hole filling member 22 may be formed on the rear surface of the front panel 20 by a printing method at a portion where the display portion 11 is formed.

That is, the hole filling member 22 formed on the rear surface of the front panel 20 by printing in a screen printing manner not only makes the whole of the plurality of first through holes 21, but also the display portion of the front panel 20 11) region can be covered.

The front panel 20 may be formed of a color steel sheet and the color steel sheet may be formed of a VCM steel sheet 23 or a PCM steel sheet having a color layer 235 through which light is transmitted 23 ') may be used.

For example, the color steel plate constituting the front panel 20 may be formed by a VMC steel plate 23. As shown in FIG. 4, the VMC steel sheet 23 is prepared by coating a pretreatment layer (not shown) chemically cleaned or coated on the upper surface of the base metal layer 231 formed of molten zinc alloy steel (GI) or electrogalvanized steel sheet 233, a primer layer 234, and a color layer 235 for color and texture representation. On the lower surface of the base metal layer 231, a back coating layer 232 is formed on the back surface of the VHS steel plate 23 exposed to the rear, the surface of which is treated to prevent corrosion or the like, based on the base metal layer 231 .

The color layer 235 forming the uppermost surface of the VHS steel plate 23 has a film-like structure and can form the front surface of the front panel 20. The back coating layer 232 forms a back surface of the front panel 20 and is in contact with the heat insulating material 24 filled in the refrigerator door 10.

In order to form the first through hole 21 on the front panel 20, a part of the back coating layer 232 formed on the lower surface of the VHS steel plate 23 is peeled off and the etching is performed. That is, the back coating layer 232 of the VMC steel plate 23 is peeled off and the first through-hole 21 is formed in the exposed base metal layer 231 using an etchant.

After the first through-hole 21 is formed, the hole filling member 22 of a material capable of transmitting light can fill the first through-hole 21. The hole filling member 22 is capable of supporting the color layer 235 that prevents the inner side of the first through hole 21 from being corroded and shields the opening of the first through hole 21. [ The hole filling member 22 can fill the first through hole 21 and cover the peeled portion of the back coating layer 232 for etching in the back surface of the base metal layer 231, Can be formed to be in the same state.

The hole filling member 22 may be formed by a printing method as will be described below, and may be formed in various forms such as coating, coating, and attaching with a material capable of transmitting light as required.

 The outer surface of the front panel 20, that is, the front surface of the refrigerator door 10 can be formed by the color layer 235, and the color layer 235 can realize various colors and textures . The color layer 235 has a structure similar to a film and may be bonded to the base metal layer 231 coated with a primer composed of a fibrous type and a fibrous free type depending on the type of the VHS steel plate 23 .

5 is a sectional view of the color layer of the color steel sheet.

As shown in the figure, the color layer 235 may be formed of a fibrous free type. The color layer 235 includes a hot melt layer 235a at its bottom and a film color layer 235b and a primer layer 235c, a deposition layer 235d, a primer layer 235e, 235f may be arranged in this order.

The hot melt layer 235a is bonded to the primer layer 234 of the VHS steel plate 23 so that the color layer 235 can be positioned above the base metal layer 231. [ The film color layer 235b may determine the color of the color layer 235, and various colors including transparent colors may be possible. The deposition layer 235d may be formed to have a metal-like texture and be positioned above the film color layer 235b, so that the color layer 235 may have a specific texture . The ply layer 235f is located on the uppermost surface of the color layer 235, so that the color layer 235 can be protected.

6 is a cross-sectional view of another color layer of the color steel sheet.

On the other hand, the color layer 235 may be formed of a Fibrous type. 6, the color layer 235 has a color PVC layer 235g formed at its bottom and includes a primer layer 235c and a deposition layer 235d, a primer layer 235e, The ferrite layer 235f may be disposed in order.

The Fibrosis layer 235g may be bonded to the primer layer 234 above the base metal layer 231. [ The fibrillated layer 235g may determine the color of the color layer 235 and may be formed in various colors including a transparent color. The deposition layer 235d may be formed to have a metal-like texture and be positioned above the film color layer 235b, so that the color layer 235 may have a specific texture . The ply layer 235f is positioned on the uppermost surface of the color layer 235 to protect the color layer 235.

As described above, the color layer 235 of the V-Si steel sheet 23 can be formed of a film material which can be applied to both the Pb-free type and the Pb-free type and which can transmit light.

The color steel plate forming the front panel 20 of the refrigerator door 10 may be a silicon steel plate 23 'in addition to the VMC steel sheet 23.

7 is a cutaway perspective view of another color steel plate constituting the front panel of the refrigerator door.

As shown in the figure, the metallic film 23 'is chemically cleaned or coated on the upper surface with reference to a base metal layer 231 formed of a molten zinc alloy steel plate (GI) or an electrogalvanized steel plate (EGI) A pretreatment layer 233, a primer layer 234 and a color layer 236 for color and texture representation are formed. When the base metal layer 231 is used as a reference, the back coating layer 232 may be formed on the rear surface of the exposed V-Si steel sheet 23 to prevent corrosion.

At this time, the color layer 235 forming the uppermost surface of the plasma Si steel plate 23 'is formed by coating or painting using a paint capable of transmitting light, and the front surface of the front panel 20 . The back coating layer 232 forms the back surface of the front panel 20 and is in contact with the heat insulating material 24 filled in the refrigerator door 10. [

Since the base metal layer 231, the back coating layer 232, the pretreatment layer 233 and the primer layer 234 except the color layer 236 have the same structure as the VCSEL 23 described above, And the detailed description thereof will be omitted.

In order to form the first through-hole 21 on the front panel 20, a part of the back coating layer 232 formed on the lower surface of the silicon steel plate 23 'is stripped and the etching is performed. That is, the back coating layer 232 of the SiC steel sheet 23 'is peeled off, and the first through-hole 21 is formed in the exposed base metal layer 231 using an etchant.

After the first through-hole 21 is formed, the hole filling member 22 of a material capable of transmitting light can fill the first through-hole 21. At this time, the hole filling member 22 can fill the first through hole 21, cover the peeled portion of the back coating layer 232 for middle etching in the base metal layer 231, As shown in FIG.

8 is a sectional view taken along the line 8-8 'in Fig.

As shown in the drawing, a plurality of first through holes 21 may be formed in the front panel 20. The plurality of first through-holes 21 are perforated to have a uniform diameter, and may be formed by etching to have a design diameter of 0.5 mm. The first through holes 21 may be formed by etching a base metal layer 231 exposed by removing a part of the back coating layer 232 on the rear surface of the front panel 20.

At this time, ferric chloride (FeCl ₃ ), which can be dissolved by reacting with the base metal layer 231, may be used as the etchant. Therefore, when the portion from which the back coating layer 232 is removed is etched using an etching solution, a first through hole 21 that completely penetrates the base metal layer 231 can be formed. At this time, overetching can be performed so that the opening of the first through-hole 21 can be maintained in a uniform size, and the diameter D of the opening of the first through-hole 21 formed by overetching May be formed to have a size between 0.5 and 0.7 mm which is somewhat larger than the design diameter.

The size of the first through hole 21 is slightly larger than the design diameter due to overetching. However, since the base metal layer 231 can be completely and uniformly passed through the first through hole 21, Are all uniform in size, and no overlapping or interference occurs between the plurality of first through-holes 21. In addition, even if the size of the first through-hole 21 is increased, the first through-hole 21 is obscured by the color layer 235 when the LED 313 is not turned on, It does not affect the user because it is invisible.

The hole filling member 22 for filling the first through hole 21 is formed on the rear surface of the front panel 20 in a printing manner and a plurality of the through holes 21, (11). Accordingly, the first through holes 21 are filled with the hole filling member 22, and the back surface of the front panel 20 corresponding to the area of the display portion 11 has a thickness of approximately 35-55 μm Thereby forming a print layer having a predetermined pattern.

 In detail, the hole filling member 22 is formed by a screen printing method, and the first through hole 21 is completely filled and the exposed portion of the base metal layer 231 corresponding to the display portion 11 It is possible to form a print layer having a predetermined thickness so as to cover all the portions. When the thickness of the hole filling member 22 is too thin, the diffusion of light transmitted through the hole filling member 22 is too small. When the thickness of the hole filling member 22 is too large, ). ≪ / RTI >

In order to form the hole filling member 22, a thermal drying type printing ink, that is, an acrylic resin ink, may be used. The printing ink may have a viscosity of 20,000 cps to 40,000 cps. When the viscosity of the printing ink is lower than 20,000 cps, there is a problem that the ink may leak even after the ink is dried. When the viscosity of the printing ink is higher than 40,000 cps, printing ink is formed inside the first through- Failure may occur because it is not completely filled.

Accordingly, the ink has a proper viscosity in order to effectively fill the first through-hole 21 of a small size with the printing ink. The printing ink may have a good kinematic viscosity depending on the characteristics of the printing ink component, so that the first through-holes 21 having a small size can be uniformly filled through the screen printing described below.

When the weight of the total coating liquid is 100%, 33w% of the main acrylic resin and 34w% of the acrylic polyol are mixed and used as the main component of the arc resin ink forming the hole filling member 22 do. By mixing such a main resin, it is possible to realize a screen printing method and satisfy the physical properties such as transparency and thermal stability.

The epoxy resin and melamine resin were mixed in an amount of 15w%, and a solvent 8w%, a thickener for controlling the kinematic viscosity 2w% ~ 3w% fumed slica, a hardener 1w% A leveling agent and an adhesion promoting material.

On the other hand, the composition ratio of some of the constituents of the hole filling member 22 can be changed depending on the situation, but the fumed silica can be determined between 2 and 3w% so as to maintain a predetermined viscosity.

By controlling the kinematic viscosity by the fumed silica, the acrylic resin ink can more effectively fill the first through-hole 21 during screen printing, thereby forming the hole-filling member 22. In other words, the acrylic resin ink can be easily introduced into the first through-hole 21 while being lowered in viscosity due to an external force applied during screen printing. When the external force is removed, (21). In this state, the hole filling member 22 is formed by drying, and the inside of the first through hole 21 can be effectively filled.

As described above, the inside of the first through hole 21 can be filled with the hole filling member 22, and the hole filling member 22 prevents the first through hole 21 from being clogged by the foreign substance . In addition, the inside of the first through hole 21 is filled with the hole filling member 22, thereby preventing the machining surface of the first through hole 21 from being corroded.

9 is an exploded perspective view showing a mounting structure of the display assembly of the refrigerator door. FIG. 10 is an exploded perspective view showing a front panel of the refrigerator door. FIG.

As shown in the drawing, the door liner 30 forming the rear surface of the refrigerator door 10 is coupled with the front panel 20 to form a surface facing the inside of the storage space. The door liner 30 may be injection molded of a plastic material, and a gasket may be disposed along the periphery, or a structure such as a basket may be mounted. The door liner 30 forms a space between the door liner 30 and the front panel 20 when the door liner 30 is coupled with the front panel 20, The liquid can be filled.

A frame 100 may be attached to the rear surface of the front panel 20. The frame 100 is provided to provide a separate space in the refrigerator door 10 where the foamed liquid is not filled and includes a display cover 200, a display assembly 300, a touch sensor assembly 500 ), The frame display 400, and the like are accommodated.

The deco members 40 and 43 form the upper and lower portions of the refrigerator door 10 and are connected to the opened refrigerator door 30 formed by the combination of the front panel 20 and the door liner 30. [ 10 and the upper and lower ends thereof.

The decor member 40 on the refrigerator door 10 of the decor members 40 and 43 is provided with an insertion port 41 and an insertion port cover 42 for opening and closing the insertion port 41. The insertion port 41 passes through the decor member 40 and communicates with the space formed by the frame 100. When the refrigerator door 10 is assembled, the display assembly 300 is inserted into the frame 100 through the insertion port 41 while being coupled to the frame display 400. For this purpose, the insertion port 41 may be formed at a size large enough to insert the frame display 400, and may be positioned vertically above the display cover 200.

Meanwhile, although not shown in detail, a hinge hole (not shown) is formed at one side of the decor member 40, to which a hinge serving as a rotation axis of the refrigerator door 10 is mounted. Electric wires guided to the inside of the frame 100 through the hinge holes are taken in and out, power is supplied to the front parts inside the frame 10, and operation signals can be transmitted and received.

A door handle (44) may be provided on the decor member (43) under the refrigerator door (10). The door handle 44 is recessed in the form of a pocket to rotate the refrigerator door 10. A lever 45 for opening and closing the refrigerator door 10 is further provided on the decorative member 43 under the refrigerator door 10 and the latch assembly 31 is operated by the operation of the lever 45 So that it is possible to select the maintenance of the opened or closed state of the refrigerator door 10.

A display cover 200 is attached to the rear surface of the front panel 20. The display cover 200 is for guiding the mounting of the display assembly 300 on which the LED 313 is mounted and is fixed to the front panel 20 by an adhesive member 25 formed by applying a double- So that it can be attached to the rear surface.

A touch sensor assembly 500 is mounted on one side of the display cover 200 to detect a pressing operation of the front panel 20 of the user. The display cover 200 has a structure that can be attached to the front panel 20 in a state of being coupled with the touch sensor assembly 500.

The display assembly 300 is inserted into the space inside the frame 100 through the insertion port 41 while being mounted on the frame display 400. When the frame display 400 is fully inserted, the display assembly 300 is positioned inside the display cover 200 and the light emitted from the LED 313 passes through the display cover 200 and the display unit 11 To be irradiated to the outside.

11 is an exploded perspective view showing a combined structure of a touch sensor assembly, a display cover, a display assembly, a frame display, and a frame according to an embodiment of the present invention.

As shown in the drawing, the frame 100 is formed so that the front surface and the top surface are opened, and is formed to form a space 110 having an open top surface when attached to the front panel 20. To this end, the periphery of the frame 100 is bent toward the front panel 20, and the ends of the frame 100 are folded outwardly to form the frame bonding portion 120. A double-sided tape or an adhesive is provided on the frame adhering portion 120 so that the frame 100 can be attached to the rear surface of the front panel 20.

The upper end of the frame 100 is in contact with the lower surface of the decor member 40 in a state where the frame 100 is attached to the front panel 20. The opened upper surface of the frame 100 can communicate with the insertion port 41 to form a separate space inside the refrigerator door 10.

Therefore, even when the foamed liquid for forming the heat insulating material 24 is injected into the refrigerator door 10, the foamed liquid can be prevented from flowing into the space inside the frame 100.

A plate supporting portion 140 on which the support plate 141 is seated is formed at both left and right ends of the frame 100. The support plate 141 is installed in an area of the upper space of the frame 100 corresponding to the upper portion of the display cover 200 with the display cover 200 mounted thereon, . Therefore, it is possible to prevent the corresponding portion of the front panel 20 from being wobbled, and also to prevent the front panel 20 from being deformed by the external impact.

A wire entry / exit port 150 is formed at an upper side of the frame 100. The electric wire entry / exit port 150 forms a passage through which electrical components installed in the frame 100 and a power line for connecting the power unit on the cabinet are connected. The electric wire entrance 150 may be formed at an upper side of a side of the refrigerator door 10 close to the hinge and may be located at a distance from the hinge hole of the refrigerator door 10. When the foamed liquid is poured into the refrigerator door 10, the foamed liquid is finely processed to prevent the foamed liquid from flowing into the frame 100.

At both right and left sides of the frame 100, a restricting groove 160 is formed. The restricting groove 160 is formed to insert a restricting portion 230 projecting laterally from both left and right ends of the display cover 200.

A cover supporting part 170 for supporting the display cover 200 is formed at a position where the display cover 200 is positioned below the restraining groove 160. The cover supporting portion 170 protrudes from both left and right sides of the frame 100 and allows the left and right ends of the display cover 200 to be pressed and supported from behind.

The display cover 200 is formed of a plate-shaped plastic material and is formed to be accommodated inside the frame 100 in a state of being attached to the front panel 20. A restricting portion 230 protruding outwardly and inserted into the restricting groove 160 is formed on the left and right sides of the display cover 200.

Meanwhile, the display cover 200 is formed with a receiving portion 210 on which the touch sensor assembly 500 is mounted. The display cover 200 includes a plurality of second through-holes 220 at positions corresponding to the display unit 11.

The second through hole 220 is formed at a position corresponding to the first through hole 21 when the display cover 200 is attached to the rear surface of the front panel. The second through-hole 220 may be formed to have a shape corresponding to the seventh segment, or may have a variety of holes to represent other information.

A blocking portion 221 is formed around the second through-hole 220. The blocking portion 221 is formed to surround the second through-hole 220 from the outside of the second through-hole 220, and is formed to protrude forward.

The adhesive member 25 for adhering the display cover 200 is attached only to the outer region of the blocking portion 221. Therefore, it is possible to minimize the gap between the first through hole 21 and the second through hole 220 caused by the thickness of the adhesive member 25 when the display cover 200 is attached, It is possible to prevent the light from leaking. The height of the protrusion of the blocking part 221 is set to a height enough to block the light spots and the height of the blocking part 221 may be adjusted to a predetermined value by considering the compression of the adhesive member 25 attached to the front surface of the display cover 200 May be formed lower than the height.

The display assembly 300 may include a display package 310 on which the LED 313 is mounted and a reflector 320 disposed on a front surface of the display package 310.

The display unit 310 includes a control unit for driving the LED 313, and a sensor control unit for driving the touch sensor assembly 500 is mounted. That is, the sensor control unit processes an operation signal of the front panel 20 sensed through the touch sensor assembly 500 on the display PCB 310. For this purpose, the sensor PCB (not shown) and the display PCB 310 inside the touch sensor assembly 500 can be connected to the cable connector 600.

The cable connector 600 includes a first cable connector 610 connected to a sensor package inside the touch sensor assembly 500 and a second cable connector 620 connected to the display package 310, The first cable connector 610 and the second cable connector 620 can be connected to each other. The first cable connector 610 and the second cable connector 620 may be connected to each other on the outside of the refrigerator door 10 in the process of mounting the display assembly 300 on the refrigerator door 10 .

That is, the overall length of the cable connector 600 is longer than the distance from the touch sensor assembly 500 to the insertion port 41, so that the touch sensor assembly 500 is mounted on the display cover 200 The display assembly 300 can be mounted on the outside of the insertion port 41 after being connected to each other.

A reflector 320 for guiding the light of the LED 313 toward the first through hole 21 is provided on the front surface of the display PCB 310. The reflector 320 not only guides the light of the LED 313 but also allows the display package 310 and the display terminal 311 to be separated from the front panel 20 by the thickness of the reflector 320 So that the display package 310 can be protected from static electricity.

Particularly, the front panel 20 is not only made of stainless steel but also may be vulnerable to static electricity generated during use due to the structure in which the display assembly 300 is disposed adjacent to the display unit 11. However, The display panel 310 can be structurally separated from the front panel 20 by the second panel 320, thereby protecting the display panel 310 from static electricity.

The reflector 320 corresponds to the arrangement of the LEDs 313 mounted on the display PCB 310. The reflector 320 has a third through hole 332 communicating with the second through hole 220 and the first through hole 21. [ (321) are formed. The frame display 400 is mounted on the display cover 200 while the display assembly 300 is mounted and the first through hole 21 and the second through hole 220 and the third through hole 321 are in close contact with each other and communicate with each other so that light emitted from the LED 313 can be radiated to the outside through the display unit 11. [

Meanwhile, the frame display 400 is mounted with the display PCB 310, and is formed in a plate shape on which the display PCB 310 is seated. A frame 410 is formed to be folded forward along the periphery of the frame display 400 to form a space in which the display package 310 is received. In addition, a sliding insertion portion 415 is formed at both left and right ends of the frame display 400 so as to be bent to both sides. The sliding insertion portion 415 is formed to be inserted into the guide rail 240 formed on the display cover 200. Therefore, the frame display 400 can be mounted on the display cover 200 by the sliding insertion portion 415.

A frame handle 420 is provided at the center of the upper end of the frame display 400 to extend upward. The frame handle 420 is formed to have a predetermined length to be held and operated by the user when the frame display 400 is coupled to the display cover 200.

When the insertion port cover 42 is closed while the frame display 400 is fully inserted, the insertion port cover 42 is brought into contact with the frame handle 420.

12 is a sectional view taken along the line 12-12 'of FIG. 13 is an enlarged view of part A of Fig.

Referring to these figures, in a state where the display cover 200 is attached to the rear surface of the front panel 20 by the adhesive member 25, the first through-hole 21 and the second through- Are communicated with each other. At this time, the size of the first through-hole 21 is formed to be very small and is much smaller than the size of the second through-hole 220, and the plurality of first through- And may be disposed in the inner region of the sphere 220.

When the frame display 400 is fully inserted and the display assembly 300 is positioned inside the display cover 200, the third through-hole 321 is inserted into the second through-hole 220 As shown in FIG. The second through hole 220 and the third through hole 321 are the same size and the reflector 320 is in close contact with the rear surface of the display cover 200, The three through-holes 321 can be completely overlapped with each other.

Therefore, the third through-hole 321, the second through-hole 220, and the first through-hole 21 can communicate with each other, and the light emitted from the LED 313 passes through the third through- Through the second through-hole 220 and the first through-hole 21 in this order, and can be irradiated to the outside of the refrigerator door 10.

A diffusion sheet 25 may be attached to the back surface of the front panel 20 where the first through-hole 21 is formed. The diffusion sheet 25 diffuses the light emitted from the LED 313 so that the light passing through the first through hole 21 is uniformly dispersed and the light emitted through the display unit 11 is uniformly bright So that characters and numerical symbols represented through the display unit 11 can be clearly identified.

Fig. 14 is a diagram showing the state of the display unit according to the embodiment of the present invention. Fig.

As shown in the figure, the display unit 11 may be formed by a plurality of first through holes 21, and may be formed in a 7-segment form according to the LED 313 to be turned on, .

In detail, the display unit 11 is not exposed to the outside when the LED 313 of the display assembly 300 is not lit, as shown in FIG. 14 (a).

In detail, the color layer 235 is formed to have a color or a specific texture and has a characteristic of allowing transmission of light. Therefore, in the state where the light of the LED 313 is not irradiated inside the refrigeration door 10, the inside area of the refrigerator door 10 in which the first through-hole 21 is formed becomes relatively dark, . Particularly, when the hue of the color layer 235 is slightly higher or the deposition layer 235d of the color layer 235 is included, this phenomenon becomes more conspicuous.

As described above, the color layer 235 of the color steel sheet has a structure for shielding the first through-hole 21, so that the first through-hole 21 can not be seen from the outside in a state in which no light is irradiated. Therefore, the display of the refrigerator door 10 can be seen as being not provided on the front surface.

In this state, when the user touches the touch operation unit 12 or the LED 313 is turned on by an operation that is already set, light emitted from the LED 313 passes through the third through hole 321 Through the second through-hole 220 and the first through-hole 21 in order.

At this time, depending on the lighting state of the LED 313, light is emitted from a part of the first through-holes 21 of the plurality of first through-holes 21, and the remaining through- So that it is not shown to the user. As described above, the first through-holes 21 through which the light of the LED passes and emit light can be combined with each other to display a specific number, a character, or a shape of a symbol externally.

For example, as shown in FIG. 14 (b), when a specific LED 313 of the LED 313 is tilted, the first through-hole 21 of a part of the plurality of first through- And can display information in the form of numbers, such as 4 ° C and -12 ° C, as shown in the figure. That is, by combining the first through-holes 21 that are lit in a state that a separate display is not visible on the front surface of the refrigerator door 10, information is transmitted through the front surface of the refrigerator door 10 in various forms It becomes possible to display it.

Hereinafter, a method of manufacturing an exterior member according to an embodiment of the present invention will be described.

15 is a flowchart sequentially showing a method for manufacturing an exterior member according to an embodiment of the present invention. 16 is a schematic diagram schematically showing a manufacturing process of the exterior member.

A color steel sheet (for example, V-Si steel sheet 23), which is the material of the front panel 20, is first formed to form the exterior member according to the embodiment of the present invention, ) Is cut to an appropriate length to be worn.

The color steel sheet is one of a VMC steel sheet 23 or a SiC steel sheet 23 'having the color layer 235. The color steel sheet is a product in which a circulating product is received and formed as it is to form the front panel 20 of the refrigerator door 10 .

Then, the color steel sheet that has been put in can be cleaned by using a solution containing sulfuric acid and caustic soda to remove foreign substances on the surface. The foreign substances on the surface of the color steel sheet can be completely removed through the washing and moved for the subsequent washing and drying. Of course, the pretreatment process for cleaning the surface of the color steel sheet and removing foreign matter may be omitted. [Steel sheet wearing step, S110]

In the color steel sheet processed and supplied to a specific size, the back coating layer 232 on the back surface can be removed by the laser irradiation device 2. The back coating layer 232 is formed on the lower surface of the color steel sheet, that is, the lower surface of the base metal layer 231, and is removed to etch the base metal layer 231.

At this time, only the area of the backlight coating layer 232 formed on the entire rear surface of the color steel sheet, that is, the area where the first through-hole 21 is formed, can be removed by the laser irradiation device 2 . Therefore, the portion of the back surface of the color steel sheet where the back coating layer 232 is removed becomes a state in which the base metal layer 231 is exposed. [Step of removing the back coating, S120]

On the other hand, the back coating layer 232 is removed and a photosensitive resin film 26 (Dry Film) is laminated to the exposed portion of the base metal layer 231. Accordingly, the entire rear surface of the color steel sheet may be formed by a portion where the back coating layer 232 is formed and a portion to which the photosensitive resin film 26 is attached. [DFR Lamination Step S130]

A masking film 27 is disposed above the photosensitive resin film 26. At this time, the masking film 27 can be aligned at an accurate position by an automated equipment. In the state that the masking film 27 is attached, ultraviolet light is irradiated in a vacuum environment to cure the photosensitive resin film 26. [Exposure step, S140]

After the masking film 27 is removed in the state in which the photosensitive resin film 26 has been cured by exposure, the exposed color steel plate is put in a developing solution, and then the remaining portion except for the cured portion, that is, Is dissolved in the developing solution and removed. Therefore, the remaining portion except the hardened portion can be removed, and can be moved for subsequent processing by washing with water. [Development Step S150]

The color steel sheet after completion of the development may be thermally dried on both sides in order to remove fine bubbles on the photosensitive resin film 26 and improve the adhesion of the photosensitive resin film 26. The temperature at this time may be about 180 to 200 DEG C for about 10 minutes. By the heat treatment, the photosensitive resin film 26 attached to the color steel sheet can be completely adhered to the base metal layer 231 in a state where bubbles are removed. Needless to say, such a heating and drying process may be omitted if necessary.

When the development of the portion for etching is completed in the photosensitive resin film 26, the color steel sheet is moved and etched. At this time, ferric chloride (FeCl ₃ ) may be used as the etching solution. Therefore, the etching solution can be reacted only with the exposed portion of the base metal layer 231 without the photosensitive resin film 26 being removed without reacting with the photosensitive resin film 26 and the back coating layer 232, The metal layer 231 is corroded to form the first through-hole 21.

At this time, the color layer 235 is also formed of a resin material, so that it is not corroded by the etchant, so that the first through hole 21 can be formed to penetrate the base metal layer 231. The color layer 235 shields the first through-hole 21 from the front.

The first through-hole 21 may be over-etched so as to have the same diameter from the inlet to the outlet through the over-etching. In addition, the first through-hole 21 may be over-etched by etching the first through- . Therefore, the plurality of first through-holes 21 may be formed to have a uniform size and position without causing a large variation in diameter and without interference between neighboring first through-holes 21 have. [Etching step, S160]

The photosensitive resin film 26 is removed in a state where the etching is completed and the first through hole 21 is molded and the first through hole 21 is formed by removing the photosensitive resin film 26 Only the colored steel plate formed remains. After completion of the removal of the photosensitive resin film 26, an inspection process may be performed to check the state of the first through-hole 21 formed.

The hole 21 may be formed with a hole filling member 22 on the color steel plate in a state where the first through hole 21 is completely formed. The inside of the first through hole 21 is filled by the hole filling member 22 and therefore the corrosion of the inside of the first through hole 21 is prevented and the opening of the first through hole 21 So that it can support the color layer 235 which shields.

The hole filling member 22 is formed so as to cover not only the first through hole 21 but also the back coating layer 232 which is peeled off for etching so that corrosion or damage to the back surface of the color steel sheet . [Hall filling step, S170]

Hereinafter, the molding process of the hole filling member will be described in more detail with reference to the drawings.

17 is a flowchart sequentially showing a method of molding a hole filling member in a first through-hole of the exterior member. 18 is a schematic view schematically showing a process of printing and molding the hole filling member in the first through-hole.

As shown in the drawing, the colored steel sheet in the state where the forming of the first through-hole 21 is completed has a state in which the opened surface of the first through-hole 21 is shielded by the color layer 235 And the other surface is exposed in an opened state so that the printing ink for forming the hole-filling member 22 can be received. The hole filling member 22 can be formed by screen printing using printing ink.

The colored steel sheet in the state where the forming of the first through hole 21 is completed is preheated before the screen printing. When the printing ink is printed on the base metal layer 231 of the color steel sheet while the color steel sheet is heated, the surface energy of the base metal layer 231 is reduced and the surface tension is lowered, The through hole 21 can be effectively filled. That is, by the heat of the colored steel sheet in a heated state, the viscosity of the printing ink is temporarily lowered, so that the printing ink is easily introduced into the first through hole 21. When the temperature is lowered, The viscosity again becomes high and the first through-hole 21 can be kept filled. [Material preheating step, S171]

The printing ink can be printed by the screen printing method on the back surface of the color steel sheet, that is, the surface opposite to the surface to which the color layer 235 is attached. Through the screen printing using the printing ink, the first through-hole 21 is filled with printing ink, and a part of the back surface of the color steel sheet is coated, thereby forming the hole-filling member 22.

A method of forming the hole filling member 22 will be described in detail with reference to the drawings.

FIG. 19 is a detailed view illustrating a screen printing process performed on a back surface of a front panel according to an embodiment of the present invention. 20 is an enlarged view showing the relationship between the mesh of the plate making and the first through-hole for screen printing.

As shown in the drawing, the preheated color steel sheet is disposed for screen printing. At this time, the color steel sheet is disposed so that the surface on which the color layer 235 is formed faces downward. At this time, the back surface of the color steel sheet and the open surface of the first through hole 21 can be exposed upward .

In this state, the plate 51 for screen printing is placed on the rear surface of the color steel plate corresponding to the display unit 11. [ At this time, all of the first through holes 21 are located inside the region of the plate 51, and the printing inks can be filled in the first through holes 21 by screen printing.

The hole filling member 22 formed by screen printing is screen-printed with a printing plate 51 of about 100 nozzles, and can be formed by printing two runs in two strokes. The hole filling member 22 formed by screen printing fills the first through hole 21 and further forms a print layer having a predetermined thickness on the back surface of the color steel sheet. At this time, the print layer may be formed in the area of the display unit 11 and cover the second through-hole 220 of the display cover 200 located behind the color steel plate.

The shape of the hole-filling member 22 printed by the plate 51 has a shape as shown in FIG. 3 when viewed from the rear. That is, the outline shape of the hole filling member 22 may be formed along the blocking portion 221 of the display cover 200.

Therefore, all of the first through holes 21 are disposed in the area of the hole filling member 22 formed by screen printing, so that interference is not generated when the display cover 200 is mounted, And also prevents interference with the signal.

Since the plate 51 for screen printing is mainly intended to fill the holes unlike the screen printing for printing the patterns, the first through holes 21 are formed in the first through holes 21 so as to effectively fill the first through holes 21, A plate having a 45 ° string angle may be used so that the number of meshes with respect to one can be formed more than the general screen plate 51.

20, the string 55 of the plate 51 is formed at an angle of 45 degrees so that 13 squares of the mesh 55 can be arranged in one of the first through holes 21. [ So that a larger number of meshes 55 can be disposed in comparison with general screen printing, so that the printing ink can be effectively filled into the first through-hole 21.

The plate 51 is seated so as to be in contact with the rear surface of the color steel sheet within a distance of about 5 mm or less to prevent the plate 51 from lifting to minimize the clearance between the plate 51 and the back surface of the color steel plate, So that a uniform filling amount can be maintained in a plurality of the first through-holes 21.

A squeeze 52 for filling the printing ink into the first through-hole 21 may be provided above the plate 51. The squeeze 52 can be moved while pressing the plate 51 while the printing ink is supplied to the plate 51 and the printing ink inside the plate 51 can be moved to the inside of the first through- So that it can be pushed inward.

The squeeze 52 is made of a rubber material having elasticity and can be pressed to press the plate 51 when it is in contact with the surface of the plate 51, .

The lower end of the squeeze 52, which is in direct contact with the meshes 55 of the plate 51, may be rounded. Accordingly, in the screen printing, it is possible to effectively fill the inside of the first through-hole 21 with the printing ink by increasing the amount of ink dropping as compared with the general printing.

That is, although the end portion of the squeeze 52 used for general screen printing is formed in a planar shape, a rounded round portion 53 is formed at the end of the squeeze 52 according to the embodiment of the present invention, A larger amount of the printing ink of the plate 51 may pass through the mesh 55 of the plate 51 and be filled in the first through-hole 21 when the second plate 52 is moved.

The squeeze 52 may further include a support member 54. The support member 54 may be provided on one side of the squeeze 52 and extend along the length of the squeeze 52. The support member 54 is formed of a material having high strength such as steel to prevent the squeeze 52 of the elastic material from being deteriorated in securing the same print thickness and reproducibility in a repetitive moving situation when the squeeze 52 is deformed by high pressure . Further, by preventing the protrusion from protruding from the round portion 53 of the end of the squeeze 52, the pressing action of the printing ink by the round portion 53 can be prevented from interfering with.

Therefore, even if the squeeze 52 is moved by the pressure applied to the squeeze 52, the entire squeeze 52 can be prevented from being bent. The support member 54 may be inserted into the squeeze 52 if necessary, or may be formed in a material or shape other than an iron plate.

On the other hand, after the formation of the hole filling member 22 is completed, an additional printing layer may be further formed on the surface of the hole filling member 22. [ The additional printed layer may be printed in black and is formed along the boundary of the 7-segment unit portion formed by the set of the first through-holes 21, so that the light leakage phenomenon occurs outside the first through- Can be prevented. And this printing layer may be formed by a continuous screen printing process. [Screen printing step, S172]

When the printing of the hole filling member 22 is completed, the drying is performed at a temperature of 100 to 120 ° C. for 15 minutes, so that bubble removal and the hole filling member 22 can be stabilized during the drying process. , S173]

After the thermal drying step is completed, the front panel 20 may be formed so as to form an outer appearance of the refrigerator door 10, such as the left and right sides of the front panel 20 are bent by the sheet metal. Of course, the forming of the front panel 20 may be performed before the etching of the first through-hole 21 or before the formation of the hole-filling member 22 by screen printing.

After the molding of the front panel 20 is completed, the display cover 200 is attached to the front panel 20. In this state, an adhesive member 25 is attached to the front surfaces of the display cover 200 and the housing cover 510 and the display cover 200 and the touch sensor assembly 500 Are attached to the rear surface of the front panel 20 at the same time.

The diffusion sheet 25 may be disposed on the display area of the back surface of the front panel 20 before the display cover 200 is attached. The diffusion sheet 25 is positioned between the first through hole 220 and the second through hole 220 and may disperse the light emitted from the LED 313 to achieve uniform brightness.

When the display cover 200 is attached to the front panel 20, the frame 100 is fixedly mounted on the front panel 20 to receive the display cover 200. The door liner 30 and the decor member 40 are assembled to form the overall shape of the refrigerator door 10. [ In this state, the foamed liquid is injected into the inside of the refrigerator door 10 to foam-mold the heat insulating material 24. The heat insulating material 24 is filled in the entire inner space of the refrigerator door 10 except for the inner region of the frame 100 to stably fix the frame 100.

The touch sensor assembly 500 is mounted on the receiving portion 210 of the display cover 200 and the housing coupling portion 511 is coupled to the receiving portion 210, So that the display cover 200 remains fixed.

The assembly of the outer shape of the refrigerator door 10 and the molding of the heat insulating material 24 are completed and the touch sensor assembly 500 is mounted on the frame display 400. [

In the state in which the touch sensor assembly 500 is mounted on the frame display 400, the operator may connect the first cable connector 610 connected to the sensor package 700 and the sensor mounted on the display package 310, The second cable connector 620 connected to the controller 330 is connected.

Since the first cable connector 610 and the second cable connector 620 are already connected after the heat insulating material 24 has been formed, the sensor controller (not shown) 330 are prevented from being damaged.

After the first cable connector 610 and the second cable connector 620 are connected to each other, the frame display 400 is inserted through the insertion port 41. Using the frame handle 420, So that the frame display 400 can be completely inserted into the display cover 200.

When the frame display 400 is fully inserted, the display assembly 300 is completely in contact with the rear surface of the display cover 200, and the first through hole 21, the second through hole 220, (321) can all be aligned and communicated in order.

After the insertion of the frame display 400 is completed, the insertion port cover 42 is attached to the insertion port 41, the insertion port 41 is closed, and the upper end of the frame handle 420 is fixed to the refrigerator door 10 ). ≪ / RTI >

Meanwhile, the outer member according to the present invention may have various other embodiments other than the above-described embodiments.

The exterior member according to another embodiment of the present invention is characterized in that only a portion of the back coat layer corresponding to the first through hole is subjected to hole etching with the laser irradiation device 2 so that etching can be performed simply.

Accordingly, the outer member according to another embodiment of the present invention differs in the peeling position, shape, and etching process of the back coating layer, and the other structures are the same as those of the above embodiment, And detailed description thereof will be omitted.

21 is a flowchart sequentially illustrating a method of manufacturing an armoring member according to another embodiment of the present invention. 22 is a schematic view schematically showing a manufacturing process of the exterior member.

As shown in the figure, in order to form the exterior member according to the embodiment of the present invention, that is, the front panel 20, the color steel sheet, which is the material of the front panel 20,

The color steel sheet is one of a VMC steel sheet 23 or a SiC steel sheet 23 'having the color layer 235. The color steel sheet is a product in which a circulating product is received and formed as it is to form the front panel 20 of the refrigerator door 10 .

Then, the color steel sheet that has been put in can be cleaned by using a solution containing sulfuric acid and caustic soda to remove foreign substances on the surface. The foreign substances on the surface of the color steel sheet can be completely removed through the washing and moved for the subsequent washing and drying. Of course, the pretreatment process for cleaning the surface of the color steel sheet and removing foreign matter may be omitted. [Steel sheet wearing step, S210]

In the color steel sheet processed and supplied to a specific size, the back coating layer 232 on the back surface can be removed by the laser irradiation device 2. The back coating layer 232 is formed on the lower surface of the color steel sheet, that is, the lower surface of the base metal layer 231, and is removed to etch the base metal layer 231.

At this time, only the size of the back coat layer 232 formed on the entire rear surface of the color steel sheet corresponding to the opening of the first through hole can be removed by laser. The back coating layer 232 is removed from the whole area of the display portion 11 including the entire first through holes 21. However, in the present embodiment, It can be seen that the back coating layer 232 is removed by the hole marking method on each of the portions corresponding to the respective first through-holes 21.

That is, the back coating layer 232 can be removed in a plurality of hole shapes corresponding to each of the plurality of first through holes 21. The diameter of the hole from which the back coating layer 232 is removed may be formed to correspond to the diameter of the first through-hole 21.

Therefore, if the back coating layer 232 is removed by the laser irradiation device 2, the base metal layer 231 can be exposed through the opened hole. The remaining back coat layer 232 can serve as a mask for distinguishing between the processed portion and the unprocessed portion in the subsequent etching process. [Step of removing the back coating, S230]

When the removal of the back coating layer 232 is completed, the color steel sheet is moved and etched. At this time, ferric chloride (FeCl ₃ ) may be used as the etching solution. Therefore, the etchant may be reacted only on the exposed portion of the base metal layer 231 without the backcoat layer 232 being removed from the backcoat layer 232 on the backside of the color steel sheet, The layer 231 is corroded to form the first through-hole 21.

At this time, the color layer 235 is also formed of a resin material, so that it is not corroded by the etchant, so that the first through hole 21 can be formed to penetrate the base metal layer 231. The color layer 235 shields the first through-hole 21 from the front.

The first through-hole 21 may be over-etched so as to have the same diameter from the inlet to the outlet through the over-etching. In addition, the first through-hole 21 may be over-etched by etching the first through- . Therefore, the plurality of first through-holes 21 may be formed to have a uniform size and position without causing a large variation in diameter and without interference between neighboring first through-holes 21 have. [Etching step, S240]

The hole 21 may be formed with a hole filling member 22 on the color steel plate in a state where the first through hole 21 is completely formed. The inside of the first through hole 21 is filled by the hole filling member 22 and therefore the corrosion of the inside of the first through hole 21 is prevented and the opening of the first through hole 21 So that it can support the color layer 235 which shields.

The hole filling member 22 is formed so as to cover not only the first through hole 21 but also the back coating layer 232 which is peeled off for etching so that corrosion or damage to the back surface of the color steel sheet . [Hall filling step, S240]

 Meanwhile, the exterior member according to the embodiment of the present invention is not limited to the refrigerator door according to the above-described embodiments, and may be provided in various types of home appliances. Since the exterior member and the display assembly described below have the same structure as the above-described display and exterior member, detailed description of the same construction will be omitted.

23 is an exploded perspective view of an air conditioner provided with a covering member on which a display unit according to an embodiment of the present invention is formed.

As shown in the figure, the indoor unit 60 of the air conditioner according to the embodiment of the present invention is formed in its entirety by a case. The case may include a base 61, a rear cabinet 62 disposed above the rear half of the base 61, and a front cabinet 63 disposed above the front half of the base 61, An exterior member 64 may be disposed on the front surface of the front cabinet 63.

The base 61, the rear cabinet 62, and the front cabinet 63 are combined to form a predetermined space therein. Inside the space, a blowing fan and a flow path for suction and discharge of air are provided, and a filter assembly for filtering the intake air, a heat exchanger for heat exchange of the intake air, and a configuration for driving the refrigeration cycle are accommodated. The base 61, the rear cabinet 62, and the front cabinet 63 are formed with a plurality of discharge ports for discharging the heat exchanged air and the suction port for sucking the outside air.

Meanwhile, the exterior member 64 is formed of a color steel plate material and can be mounted on the front cabinet 63. Therefore, the front surface of the front cabinet 63 can be opened by pivoting or detaching the configuration in which the exterior member 64 or the exterior member 64 is mounted, So that operation and maintenance of the components can be performed. Of course, the exterior member 64 may be configured to be fixedly mounted on one side of the case in a configuration that constitutes the external appearance of the indoor unit 60.

The exterior member (64) may be provided with a display unit (65) for displaying the operation state of the air conditioner. The display unit 65 may be formed as a set of fine through holes as in the above embodiment. The through holes are formed by the above-described method of forming the holes by the etching, and are shielded by the color layer, And the through-holes can be filled by the hole-filling member. If necessary, a touch operation unit 66 may be formed on one side of the display unit 65 by printing or surface processing.

A display assembly 67 is disposed behind the display unit 65. The display assembly 67 can illuminate the display unit 65 to display operation information of the air conditioner. The display assembly 67 may comprise a combination of LEDs to provide information in the form of numbers or symbols.

That is, when the LED of the display assembly 67 is lit, the display unit can be displayed on the front surface of the exterior member 64 by the light passing through the through-holes. When the LED is turned off, The shielding portion is shielded by the color layer of the display portion 64, so that the display portion as well as the through-hole itself are not seen.

The touch sensor assembly 500 may be attached to the rear surface of the exterior member 64 corresponding to the touch operation unit 66. The touch sensor assembly 500 is adhered by an adhesive such as an adhesive or a double-sided tape, and the touch sensor assembly 500 is brought into close contact with the touch operation unit 66 to recognize a user's touch operation.

24 is an exploded perspective view of a washing machine provided with a covering member on which a display unit is formed according to an embodiment of the present invention.

As shown in the figure, the washing machine 70 according to the embodiment of the present invention includes a washing machine main body 71 for forming an outer tube, a tub for storing wash water, a drum rotatably disposed inside the tub, A driving device for transmitting a rotational force for rotating the drum, a washing water supplying device for supplying washing water to the tub, and a discharging device for discharging the washing water.

A part of the front surface of the washing machine main body 71 is opened to allow laundry to be inserted into the drum and the opening of the washing machine body 71 can be opened and closed by the door 72. To this end, the door 72 is rotatably mounted on the main body 71.

The front and top surfaces of the washing machine main body 71 except for the door 72 may be provided with an exterior member 73 formed of a color steel plate. The display unit 74 and the touch operation unit 75 may be formed on at least a part of the exterior member 73.

The display unit 74 displays the operation state of the washing machine 70, and may be formed as a set of fine through-holes as in the above-described embodiment. The through-holes are formed by the above-described method of forming a hole by etching, and have a structure that is shielded by a color layer, and the through-holes can be filled by the hole-filling member

The touch operation unit 75 can be operated and operated by the user's touch operation. Of course, a dial-shaped knob 76 for operating the washing machine 70 may be provided.

A display assembly 77 is provided at the rear of the display unit 74 and the operation of the washing machine 70 can be expressed by irradiating light to the display window 74 by the display assembly 77 . The display assembly 77 may comprise a combination of LEDs to provide information in the form of numbers or symbols.

That is, when the LED of the display assembly 77 is lit, the display unit can be displayed on the front surface of the exterior member 73 by the light passing through the through-holes. When the LED is turned off, The shielding portion is shielded by the color layer of the display portion 73 so that not only the display portion but also the through-hole itself is hidden.

The touch sensor assembly 500 may be attached to the rear surface of the exterior member 73 corresponding to the touch operation unit 75. The touch sensor assembly 500 is adhered by an adhesive such as an adhesive or a double-sided tape, and the touch sensor assembly 500 is closely attached to the touch operation unit 75 to recognize the touch operation of the user.

25 is an exploded perspective view of a dishwasher provided with a covering member having a display unit according to an embodiment of the present invention.

Referring to the drawings, a dishwasher 80 provided with a touch sensor assembly 500 according to an embodiment of the present invention is formed in an outer shape by a dishwasher main body 81 formed in a substantially rectangular parallelepiped shape.

Although not shown in detail, the dishwasher main body 81 includes a cavity in which a dishware for washing is received, a rack member that is drawn out from the cavity and on which the dishware is seated, and water for washing into the cavity A water supply device for supplying water, a discharge device for discharging the washed water, and the like.

The dishwasher main body 81 is provided with a door 82. The door 82 is configured to selectively shield the opened front face of the dishwasher main body 81. When the door 82 is closed, the front face of the dishwasher 80 is formed.

The door 82 may include an upper door and a lower door, and may have a structure in which the upper door may be opened and closed when the lower door is operated. In addition, the lower door may be provided with a handle 83 for opening and closing the door 82.

An exterior member 84 is attached to the front surface of the door 82, that is, the front surface of the upper door and the front surface of the lower door. The exterior member 84 may be formed of a color steel material and form at least a part of the front surface of the door 82.

The exterior member 84 may be provided with a display unit 85 for indicating the operating state of the dishwasher 80. The display window 85 may be formed as a set of fine holes as in the above-described embodiment. In addition, the display unit 85 may be formed as a group of fine through-holes as in the above-described embodiment, and the through-holes are formed by the above-described method of forming holes by etching, And the through-holes can be filled by the hole filling member

A display assembly 87 is provided behind the display unit 85. The display assembly 87 can display the operation information of the dishwasher 80 by irradiating the display unit 85 with light. The display assembly 87 may comprise a combination of LEDs to provide information in the form of numbers or symbols.

That is, when the LED of the display assembly 87 is lit, the display unit can be displayed on the front surface of the exterior member 84 by the light passing through the through-holes. When the LED is turned off, Shielding by the color layer of the display portion 84, and the through-hole itself as well as the display portion is not seen.

A touch operation unit 86 may be formed on one side of the display unit 85 by printing or surface processing. The touch sensor assembly 500 may be attached to a rear surface of the exterior member 84 corresponding to the touch operation unit 86. The touch sensor assembly 500 is adhered by an adhesive such as an adhesive or double-sided tape, and the touch sensor assembly is closely attached to the touch operation unit to recognize the touch operation of the user.

26 is an exploded perspective view of a cooking apparatus provided with an exterior member on which a display unit according to an embodiment of the present invention is formed.

As shown in the drawing, a cooking device 90 provided with a touch sensor assembly 500 according to an embodiment of the present invention is formed in an outer shape by a cooking device body 91 formed in a substantially rectangular parallelepiped shape.

Although not shown in detail, the cooking apparatus main body 91 is provided with a cavity for containing food for cooking, a heating means or magnetron for cooking the food inside the cavity, and a fan assembly for convection inside the cavity .

The cooking device main body 91 is provided with a door 92. The door 92 is configured to selectively shield the opened front face of the cooking device main body 91 and form the front face of the cooking device 90 when the door 92 is closed.

The door 92 is hingedly coupled to the cooking device main body 91 so as to be rotatable. The door 92 is rotated in the left-right direction or the vertical direction to selectively open and close the opened front face of the cooking device 90.

The door (92) is provided with a handle (93) for opening and closing the door (92). The front surface of the door 92 may be provided with an exterior member 94 which forms the front surface of the door 92. The exterior member 94 may be formed of a color steel plate and may be formed on one side of the cooking apparatus main body 91 without being limited to the door 92.

Meanwhile, the exterior member 94 may be provided with a display unit 95 for displaying the operation state of the cooking appliance 90. [ The display unit 95 may be formed as a set of fine through-holes as in the above-described embodiment. The through-holes are formed by the above-described method of forming a hole by etching, and are structured to be shielded by the color layer, and the through-holes can be filled by the hole-filling member

A display assembly 97 is provided behind the display unit 95. The display assembly 97 can illuminate the display window 95 to display operation information of the cooking apparatus. The display assembly 97 may comprise a combination of LEDs to provide information in the form of numbers or symbols.

That is, when the LED of the display assembly 97 is lit, the display unit can be displayed on the front surface of the exterior member 94 by the light passing through the through-holes. When the LED is turned off, The shielding portion is shielded by the color layer of the display portion 94, so that not only the display portion but also the through-hole itself is hidden.

A touch operation unit 96 may be formed on one side of the display unit 95 by printing or surface processing.

The touch sensor assembly 500 may be attached to the rear surface of the exterior member 94 corresponding to the touch operation unit 96. The touch sensor assembly 500 is adhered by an adhesive such as an adhesive or a double-sided tape, and the touch sensor assembly 500 is closely attached to the touch operation unit 96 to recognize the touch operation of the user.

Claims (34)

A color steel plate covering a display assembly including a plurality of LEDs, wherein a color layer forming a color and a texture of a home appliance and a back coating layer for preventing corrosion are formed on a front surface and a back surface;
A plurality of first through holes formed at positions corresponding to positions corresponding to the plurality of LEDs and recessed from the back surface of the color steel sheet to the color layer;
And a hole filling member formed to fill each of the plurality of first through holes and transmitting light of the LED,
Wherein the plurality of first through-holes form a display portion for displaying information on operation of the refrigerator externally through light transmitted through the color layer when the LED is lit, and when the LED is off, the first through- And the cover member is covered so as not to be exposed.
The method according to claim 1,
Wherein the colored steel sheet is a VMC steel sheet or a SiC steel sheet.
3. The method of claim 2,
Wherein the back coating layer is removed to a corresponding size at a location corresponding to each of the plurality of first through holes.
3. The method of claim 2,
Wherein the back coating layer is removed by an area of a size including all of the plurality of first penetrations.
5. The method of claim 4,
Wherein the hole filling member is formed so as to cover all portions of the back surface of the color steel sheet from which the back coating layer is removed.
3. The method of claim 2,
And the design diameter of the first through hole is 0.5 mm.
The method according to claim 6,
Wherein the first through holes are formed to have the same diameter as a whole by overetching.
8. The method of claim 7,
Wherein the first through-hole is formed to have a diameter of 0.5 to 0.7 mm.
3. The method of claim 2,
Wherein the color layer is formed of a film type or formed by painting or coating a paint.
The method according to claim 1,
The color steel sheet is a VMC steel sheet,
The color layer comprising a film color layer exhibiting color,
And an evaporation layer that shows a metallic texture on the lower surface of the color layer.
The method according to claim 1,
The color steel sheet is a VMC steel sheet,
Characterized in that the color layer comprises a fibrous layer which exhibits color.
The method according to claim 1,
Wherein the first through-hole is etched using ferric chloride.
The method according to claim 1,
Wherein the hole filling member is formed on the back surface of the color steel sheet by a screen printing method.
14. The method of claim 13,
Wherein the printing ink forming the hole filling member is formed to have a viscosity of 20,000 cps to 40,000 cps.
15. The method of claim 14,
Wherein the printing ink comprises 2w% to 3w% of fumed slicers based on the total weight of the printing ink.
The method according to claim 1,
A display cover for receiving the display assembly is closely attached to a rear surface of the exterior member,
Wherein a plurality of second through holes are formed in the display cover so that light emitted from the LED passes through the second through hole and the first through hole in order.
17. The method of claim 16,
Wherein one of the second through-holes is formed larger than the first through-hole, and is communicated with a plurality of the first through-holes forming a unit set.
18. The method of claim 17,
Wherein the back surface of the exterior member is provided with a diffusion sheet that shields the entire display portion and diffuses the transmitted light.
A step in which a color steel sheet forming an outer appearance of the household appliance is received [S110];
Removing the back coating layer on the back surface of the color steel sheet by laser with a region corresponding to the display portion [S120];
Laminating a photosensitive resin film on the surface of the base metal layer exposed on the color steel sheet from which the back coating layer has been removed [S130];
A step S140 of arranging a masking film designed to form a hole at a position corresponding to a position where the first through-hole is formed, and then curing the photosensitive resin film by irradiating ultraviolet rays;
Removing the remaining portion of the photosensitive resin film except the cured portion by dissolving in a developing solution [S150];
Etching the base metal layer corresponding to the position of the first through-hole leaving the color layer of the color steel sheet by spraying an etchant to etch the first through-hole;
And forming a hole filling member to support the color layer with a material capable of transmitting light through the first through-hole.
20. The method of claim 19,
Wherein the colored steel sheet is a VMC steel sheet or a SiC steel sheet.
21. The method of claim 20,
Wherein the etching solution is ferric chloride.
21. The method of claim 20,
Wherein the first through hole is over-etched and formed to have a diameter larger than the design diameter.
20. The method of claim 19,
Wherein the hole filling member is formed to cover the entire area of the display portion from which the back coating layer is removed.
20. The method of claim 19,
Wherein the hole filling member is formed by screen printing on the back surface of the color steel sheet with printing ink.
25. The method of claim 24,
Wherein the printing ink is formed to have a viscosity of 20,000 cps to 40,000 cps.
26. The method of claim 25,
Wherein the printing ink comprises 2w% to 3w% of fumed slice based on the total weight of the printing ink.
A step in which a color steel sheet forming the appearance of the household appliance is received (S210);
Removing the back coating layer on the back surface of the color steel sheet by a laser by a distance corresponding to each of the plurality of first through holes by the size of the first through hole [S220];
Etching the first through hole by etching the base metal layer corresponding to the position of the first through hole leaving the color layer of the color steel sheet by spraying the etching solution [S230];
And forming a hole-filling member to support the color layer with a material capable of transmitting light through the first through-hole.
28. The method of claim 27,
Wherein the colored steel sheet is a VMC steel sheet or a SiC steel sheet.
29. The method of claim 28,
Wherein the etching solution is ferric chloride.
29. The method of claim 28,
Wherein the first through hole is over-etched and formed to have a diameter larger than the design diameter.
28. The method of claim 27,
Wherein the hole filling member is formed to cover the entire area of the display portion from which the back coating layer is removed.
28. The method of claim 27,
Wherein the hole filling member is formed by screen printing on the back surface of the color steel sheet with printing ink.
33. The method of claim 32,
Wherein the printing ink is formed to have a viscosity of 20,000 cps to 40,000 cps.
34. The method of claim 33,
Wherein the printing ink comprises 2w% to 3w% of fumed slice based on the total weight of the printing ink.

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