CN107642940B - Refrigerator with a door - Google Patents
Refrigerator with a door Download PDFInfo
- Publication number
- CN107642940B CN107642940B CN201710135703.9A CN201710135703A CN107642940B CN 107642940 B CN107642940 B CN 107642940B CN 201710135703 A CN201710135703 A CN 201710135703A CN 107642940 B CN107642940 B CN 107642940B
- Authority
- CN
- China
- Prior art keywords
- light guide
- guide plate
- substrate
- light
- operation portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention provides a refrigerator which can improve the luminous efficiency by enabling the distance between an LED and a light guide plate to be closer than that of the prior refrigerator. The substrate assembly (30) is provided with: a substrate (40) provided with a detection unit (41) and operation unit LEDs (42 a-42 d) for lateral irradiation, wherein the detection unit (41) has a plurality of sensor units (41 a-41 f) arranged therein for detecting operations; a surface film (90) which is provided on the front surface of the substrate (40) and on which operation display sections (91 a-91 f) corresponding to the sensor sections (41 a-41 f) are formed; and an operation portion light guide plate (50) which guides light of the operation portion LEDs (42 a-42 d) to the operation display portions (91 a-91 f), and positions the operation portion LEDs (42 a-42 d) less than the sensor portions (41 a-41 f) by means of protrusions (52, 53) formed on the operation portion light guide plate (50) and insertion holes (46, 47) formed on the substrate (40).
Description
Technical Field
The present invention relates to a refrigerator.
Background
In a refrigerator having a touch panel provided on a door, there is proposed a refrigerator including: a plurality of detection units for detecting a touch operation; a display unit (substrate front surface member) corresponding to each detection unit; an LED for emitting light from the display unit; a substrate provided with a detection section and an LED; and a light guide plate (light guide unit) for guiding light from the LEDs to the respective display sections (see patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2015-55359
In addition, in order to improve the light emission efficiency, the distance between the LED and the light guide plate needs to be close. However, in the refrigerator described in patent document 1, since the light guide plate is mounted on the case after the substrate is mounted on the case (substrate housing member), three errors, that is, an error in forming the case, an error in forming the substrate, and an error in forming the light guide plate, must be taken into consideration, and the distance between the LED and the light guide plate cannot be sufficiently close to each other. Therefore, the number of LEDs needs to be increased to compensate for the decrease in luminous efficiency.
Disclosure of Invention
The present invention has been made to solve the above conventional problems, and an object of the present invention is to provide a refrigerator capable of improving light emission efficiency by making the distance between an LED and a light guide plate closer than that of the conventional one.
The invention provides a refrigerator, which comprises: a door provided in the refrigerator main body; a heat insulation member provided inside the door; and a substrate assembly provided on a front surface of the door, wherein the substrate assembly includes: a substrate provided with a detection section in which a plurality of sensor sections for detecting an operation are arranged, and a laterally-illuminated LED; a display member provided on the front surface of the substrate and having operation display portions corresponding to the sensor portions; and a light guide plate that guides light of the LEDs to the operation display portions, the light guide plate being positioned on the substrate via positioning portions, the number of the LEDs being smaller than the number of the sensor portions.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, it is possible to provide a refrigerator capable of improving light emitting efficiency by making the distance between an LED and a light guide plate closer than that of the related art.
Drawings
Fig. 1 is a front view of the refrigerator of the present embodiment.
Fig. 2 is an exploded perspective view of the board assembly when viewed from the near side.
Fig. 3 is an exploded perspective view of the board assembly when viewed from the rear surface side.
Fig. 4 is a front view showing a display film.
Fig. 5 is a front view of the light guide plate for operation unit.
Fig. 6 is a front view showing a state where the surface film and the light guide plate for operation unit are removed from the substrate assembly.
Fig. 7 is a front view showing a state where the surface film is removed from the substrate assembly.
Fig. 8 shows the height relationship between the protrusion of the light guide plate for operation portion and the LED for operation portion, where (a) is a view before the light guide plate for operation portion is mounted on the substrate, and (b) is a view after the light guide plate for operation portion is mounted on the substrate.
Fig. 9 is a diagram illustrating the effect of light emission efficiency, where (a) is a case where the operation portion light guide plate and the operation portion LED are close to each other, and (b) is a case where the operation portion light guide plate and the operation portion LED are far from each other.
Fig. 10 is a vertical sectional view showing a state in which the door of the board assembly is mounted.
Fig. 11 is a diagram showing a relationship between the position of the light output portion of the light guide plate for operation portion and the irradiation range of the LED for operation portion.
Description of the symbols
1-refrigerator, 2 a-door, 7-foam heat insulator (heat insulator), 10-refrigerator body, 30-substrate assembly, 40-substrate, 41-detection part, 41a, 41b, 41c, 41d, 41e, 41 f-sensor part, 42a, 42b, 42c, 42 d-operation part led (led), 46, 47-insertion hole (concave part, positioning part), 50-operation part light guide plate (light guide plate), 51a, 51b, 51c, 51d, 51e, 51 f-light output part, 52, 53-protrusion part (convex part, positioning part), 54-notch, 90-surface film (display part), 91-operation part, 91a, 91b, 91c, 91d, 91e, 91 f-operation display part.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings as appropriate.
Fig. 1 is a front view of the refrigerator of the present embodiment.
As shown in fig. 1, the refrigerator 1 includes a refrigerator main body (heat-insulating box) 10 that defines a refrigerating compartment 2, an ice-making compartment 3, an upper-stage freezing compartment 4, a lower-stage freezing compartment 5, and a vegetable compartment 6 from above. A front opening of the refrigerating compartment 2 is provided with left and right half- open doors 2a and 2b for opening and closing the front opening. In addition, pull-out doors 3a, 4a, 5a, and 6a for opening and closing front openings of ice making chamber 3, upper-stage freezing chamber 4, lower-stage freezing chamber 5, and vegetable chamber 6 are provided at the front openings. Although the following description will be given by taking as an example the refrigerator 1 including six doors 2a, 2b, 3a, 4a, 5a, and 6a, the present invention can also be applied to a refrigerator including five or less doors and seven or more doors. In the following description, the door 2a corresponds to a door according to the present embodiment.
A transparent glass plate 20 (a translucent decorative plate) is attached to the front surface of each of the doors 2a, 2b, 3a, 4a, 5a, and 6 a. The glass plate 20 is mainly rectangular, and has an area disposed substantially over the entire front surface of each of the doors 2a, 2b, 3a, 4a, 5a, and 6 a.
Further, the door 2a is provided with a board assembly 30. The substrate assembly 30 is located on the back surface side of the glass plate 20. In the present embodiment, the case where the board assembly 30 is provided in the door 2a is described as an example, but the board assembly may be provided in the doors 2b, 3a, 4a, 5a, and 6a, or may be provided in a plurality of positions in the doors 2a, 2b, 3a, 4a, 5a, and 6a instead of only one position.
Fig. 2 is an exploded perspective view of the board assembly when viewed from the near side.
As shown in fig. 2, the board assembly 30 includes a board 40, a light guide plate 50 for an operation portion, a board case 60, a light guide plate 70 for a display portion, a light shielding plate 80 for a display portion, and a surface film 90. The light guide plate 50 for the operation portion corresponds to the light guide plate described in the claims.
The substrate 40 is formed of an epoxy glass substrate or the like, and is formed to have four corners and a long lateral direction. Further, the substrate 40 includes: a detection unit 41 for detecting a change in capacitance; an operation portion light-emitting unit 42 for displaying the operation portion 91 provided on the surface film 90 by emitting light; a display unit for display unit light-emitting means 43 (see fig. 3) for displaying light emission of a display unit 92 provided on the surface film 90; includes a determination unit (not shown), an automatic control unit 44 (see fig. 3) of a microcomputer, and the like.
The front side of the substrate 40 (including the detection unit 41) is covered with a surface film (substrate front surface member) 90, and the back side is covered with the substrate case 60.
The detection unit 41 detects a touch operation of the operation unit 91 through the glass plate 20 (see fig. 1), and six sensor units 41a, 41b, 41c, 41d, 41e, and 41f are provided in a row at equal intervals in the left-right direction. The detection unit 41 has another capacitive sensor unit 41g disposed on the left side of the left end sensor unit 41 a. The sensor units 41a to 41f correspond to (are disposed facing) operation display units 91a, 91b, 91c, 91d, 91e, and 91f of the operation unit 91 formed on the surface film 90.
The detection unit 41 is paired with the operation unit 91 when the door 2a is installed. That is, the operation unit 91 is disposed on the front side and the detection unit 41 is disposed on the back side so as to overlap with the glass plate 20 as an insulator, the front surface film 90, and the operation unit light guide plate 50.
Further, a plurality of holes 45a are formed above the detection portion 41 of the substrate 40, and the display portion light guide plate 70 protrudes from each of the plurality of holes 45a toward the front surface side of the substrate 40.
In addition, in the substrate 40, an insertion hole 46 (concave portion) into which a projection 52 (convex portion) described later is inserted is formed in the vicinity of the sensor portion 41f at the right end of the detection portion 41, and an insertion hole 47 (concave portion) into which a projection 53 (convex portion) described later is inserted is formed in the vicinity of the sensor portion 41a of the detection portion 41. The projections 52 and 53 are formed in a cylindrical shape and project toward the substrate 40. In the present embodiment, the projections 52 and 53 and the insertion holes 46 and 47 constitute positioning portions.
The light emitting unit 42 for the operation portion is composed of four leds (light emitting diodes) 42a, 42b, 42c, and 42d for the operation portion, and is mounted on the front surface (front surface) of the substrate 40. In the light emitting unit 42 for an operation portion, two LEDs 42a, 42b for an operation portion are arranged on one side (right side of the sensor portion 41f) in the arrangement direction (left-right direction) of the sensor portions 41a to 41f, and two LEDs 42c, 42d for an operation portion are arranged on the other side (left side of the sensor portion 41 a). The operation portion LEDs 42a and 42b on one side are arranged to be vertically separated, and the operation portion LED42a is arranged at a height position corresponding to the detection portion 41. Similarly, the other operation portion LEDs 42c and 42d are disposed so as to be vertically separated from each other, and the operation portion LED42c is disposed at a height position corresponding to the detection portion 41.
The operation portion LEDs 42a to 42d are arranged so that the irradiation direction is lateral, that is, so as to emit light in a direction along the surface of the substrate 40 (toward the detection portion 41). The operation section LEDs 42a and 42b are disposed so as to face the operation section LEDs 42c and 42 d.
The display unit light-emitting unit 43 (see fig. 3) includes a plurality of display unit LEDs 43a on the side opposite to the operation unit light-emitting unit 42, i.e., on the back surface of the substrate 40. Each display-section LED43a is provided on the right or left edge of hole 45 a.
The determination unit (not shown) detects a change in capacitance between the operation unit 91 and the detection unit 41 in the substrate 40. The determination unit includes an oscillation circuit, and oscillates according to a change in the capacitance when it is determined that the capacitance has changed, and changes the amplitude.
The automatic control unit 44 drives the load based on the switching signal and the on/off signal output from the determination unit. The switch signal or the on/off signal outputted from the determination unit is not outputted by the operation of the user passing through the operation unit 91 or by the user wiping the front surface (door 2a) of the refrigerator for cleaning.
The light guide plate 50 for operation portion is disposed on the front surface side of the detection portion 41, diffuses light from the LEDs 42a to 42d for operation portion, and is formed to be transparent or translucent. The light guide plate 50 for operation portion is elongated in the left-right direction, and light output portions 51a, 51b, 51c, 51d, 51e, and 51f are formed at positions facing the sensor portions 41a to 41f of the detection portion 41. The light guide plate 50 for the operation portion is formed of an acrylic resin (methyl methacrylate), a styrene resin (polystyrene), or the like.
The operation portion light guide plate 50 has a side surface 52a extending horizontally in the left-right direction at the upper end, a side surface 52b extending horizontally in the left-right direction and shorter than the side surface 52a at the lower end, a side surface 52c extending vertically in the up-down direction at the right end, and a side surface 52d extending vertically in the up-down direction at the left end. That is, the light guide plate 50 for operation portion has a flat shape without providing concave notches on the side surfaces 52a, 52b, 52c, and 52 d. This allows light from the operation portion LEDs 42a to 42d to be efficiently transmitted.
The light guide plate 50 for operation portion has positioning protrusions 52 and 53 protruding toward the substrate 40. One projection 52 is formed on the right side in the left-right direction with respect to the light output section 51 f. The other projection 53 (see fig. 3) is formed on the left side of the light output section 51a in the left-right direction.
The light guide plate for operation portion 50 is formed with a rectangular notch 54 for retraction in which the LED for operation portion 42c is disposed. The light guide plate 50 for operation portion is formed such that a reinforcing protrusion 55 for forming the protrusion 52 protrudes rightward from the side surface 52 c.
The substrate case 60 is made of synthetic resin (e.g., ABS resin) and has a substantially quadrangular disk shape having an opening 61 on the front surface. A holding portion 62 for holding the light guide plate 70 for display portion is formed on the bottom surface of the substrate case 60. Further, the substrate case 60 is formed with projections 63a and 63b for positioning the substrate 40 (the projection 63b is shown in fig. 6).
The substrate case 60 has a gray-based color tone (painting or film transfer) which is a low reflection color tone. When the substrate case 60 is colored in a color that easily reflects light such as white, light is reflected and diffused by the substrate case 60 on the back side of the display section LED43a (see fig. 3) when the display section LED43a is caused to emit light, which causes a problem of light leakage. Therefore, by making the color of the substrate case 60 a gray color that is difficult to reflect light, when only a specific character among the plurality of characters displayed on the display unit 92 is displayed, it is possible to display an unnecessary character while suppressing light leakage to the adjacent character side. The color of the substrate case 60 is not limited to gray, and may be a color that hardly reflects light or a surface-treated state. Further, a portion of the substrate case 60 facing the display-section light guide plate 50 may be coated.
The display unit light guide plate 70 has a plurality of light guide portions 71a, and the plurality of light guide portions 71a correspond to characters, figures, and the like of the display unit 92 and are positioned at positions overlapping in the front-rear direction. Each light guide portion 71a has a rectangular surface 71b whose front surface is parallel to the surface of the front film 90. Each light guide portion 71a is formed by integrally molding a light-transmitting resin, and each light guide portion 71a is connected to the rear surface side of substrate 40.
The light shielding plate 80 for a display unit is made of a resin material, and a plurality of holes 80a are formed so as to surround the entire periphery of each light guide unit 71 a. In other words, the periphery of light guide portion 71a located on the front surface side of substrate 40 via hole 45a is surrounded by the frame portion forming hole 80a, and light guide portions 71a become independent light guide portions. Further, since the entire periphery of the side surface of light guide portion 71a is surrounded by light shielding plate 80 for a display portion, light is less likely to leak to the outside of light guide portion 71a, light is reflected and diffused inside light guide portion 71a, and uneven illuminance of characters displayed by light emission is suppressed to be displayed uniformly. Further, light leakage to other light guide portions 71a and other adjacent display characters can be suppressed, and the design and display contents of the appearance can be prevented from being displayed by mistake.
Further, by making the light shielding plate 80 for display unit dark (for example, black), the light from the LED43a for display unit (see fig. 3) can be reflected and diffused inside the light guide plate 70 for display unit, and the displayed characters, graphics, and the like can be displayed clearly while suppressing the illuminance unevenness.
The surface film 90 is disposed in close contact with or in proximity to the front surface of the operation portion light guide plate 50 and the display portion light shielding plate 80. The surface film 90 is configured to transmit light from the operation portion light emitting unit 42 and the display portion light emitting unit 43 (see fig. 3) from the inner surface to the front surface and to the glass plate 20 side. The surface film 90 is thin, such as a film or a sheet, as long as it can transmit light in an uncolored portion or a light-colored portion.
Fig. 3 is an exploded perspective view of the board assembly when viewed from the rear surface side.
As shown in fig. 3, the light guide plate 50 for operation portion is attached in a state where the light guide plate 50 for operation portion is positioned on the substrate 40 by inserting the protrusions 52 and 53 formed on the light guide plate 50 for operation portion into the insertion holes 46 and 47 formed on the substrate 40.
Each light guide portion 71a of the light guide plate for display unit 70 has an inclined surface 71c, and the inclined surface 71c is thick on the side closer to the LED43a for display unit and becomes thinner as it becomes farther from the LED43a for display unit. Further, the inclined surfaces 71c are in surface contact with the inclined surfaces 62a (see fig. 2) formed on the holding portion 62, so that the light guide plate for display portion 70 can be stably held by the board housing 60, and the light of the LEDs for display portion 43a can be guided to the entire light guide plate for display portion 70.
The display-section light shielding plate 80 has a recess 80b formed on the rear surface side thereof and on one side in the left-right direction of the hole 80a to accommodate the resistive member 45b (see fig. 2) provided on the front surface of the substrate 40. That is, the resistance member 45b of the display-section LED43a provided on the substrate 40 is provided on the front surface of the substrate 40. The resistance member 45b is positioned near the side of the light guide portion 71a on the front surface of the substrate 40, and is covered with a recess 80b provided in the light shielding plate 80 for the display portion. Since the concave portion 80b is provided, a convex portion is not formed on the front side of the light shielding plate 80 for the display unit in order to house the resistance member 45b, and the front surface of the light shielding plate 80 for the display unit is flat, so that the substrate assembly 30 can be thinned.
Fig. 4 is a front view showing a display film of the substrate assembly.
As shown in fig. 4, the surface film 90 is provided on the frontmost surface of the substrate assembly 30 (see fig. 2), and has a horizontally long rectangular shape in front view. As shown by a dotted line E1, the front surface film 90 has an operation portion 91 that is touched by a finger of the user for operation. As indicated by a dashed-dotted line E2, a display unit 92 that displays a state set by operation of the operation unit 91 is provided above the surface film 90.
The operation unit 91 is composed of operation display units 91a, 91b, 91c, 91d, 91e, and 91 f. The operation display portions 91a to 91f are arranged in a row along the width direction of the door 2 a. Further, characters for display and the like for causing the operation display units 91a, 91d, and 91e to perform other functions in accordance with other operations are formed below the operation display units 91a, 91d, and 91 e.
Each of the operation display portions 91a to 91f is composed of characters (each of the characters is power-saving, freezing, refrigerating, ice-making, cooling mode, and vacuum refrigerating), figures, and the like. The characters, graphics, and the like are translucent characters, graphics, and symbols that are displayed by partially removing the color of the surface film 90, and are displayed by being transmitted to the front surface of the glass plate 20 only when the LEDs (light emitting diodes) 42a to 42d for the operation portion emit light, so that the characters, graphics, and the like can be seen by the user.
In addition, a display touch portion 93 is formed in a region of the front film 90 different from the operation portion 91 and the display portion 92. The display touch portion 93 is displayed on the inner surface of the glass plate 20 by direct printing or the like. Further, as a method of providing the display touch portion 93 on the inner surface of the glass plate 20, in addition to printing, etching, damascene, and the like can be cited.
The user can set the power saving mode by operating the operation display portion 91a from the outside of the refrigerator 1, for example, set the room temperature of the refrigerating room 2 (see fig. 1) by operating the operation display portion 91b, and set the room temperatures of the freezing rooms 4 and 5 (see fig. 1) by operating the operation display portion 91 c. Further, by operating the operation display portion 91d, on/off of the operation of the ice making device and quick ice making can be set. Further, by operating the operation display portion 91e, the refrigerating compartment 2, the freezing compartments 4 and 5 can be quickly frozen, and the cooling of the vegetable compartment 6 (see fig. 1) can be enhanced. Further, by operating the operation display portion 91f, it is possible to set a function of adjusting the temperature of a storage room (not shown) provided in the refrigerating room 2 and configured to maintain the freshness of the stored food and suppress deterioration of oxidation by bringing the storage space into a reduced pressure or low oxygen state, and closing the reduction of pressure or low oxidation. That is, the user can set each function of the refrigerator 1 by operating the operation unit 91.
The display unit 92 displays the input result from the operation unit 91 on the outside of the refrigerator main body 10 (the front surface of the door 2 a). This allows the user to confirm the operation performed by the operation unit 91 and the state of each function set up before.
Further, characters ("power pull-on", "water supply", "frequent opening/closing, power saving", "strong, medium, weak", "quick ice making, ice stop", "fresh-keeping freezing, quick freezing, vegetable room reinforcement", "vacuum refrigeration, vacuum ice temperature, vacuum off") and graphics of the display unit 92 are light-transmitting characters and graphics that are displayed by partially removing the color of the surface film 90, like the operation unit 91, and are displayed through the front surface of the glass plate 20 only when the display unit on the substrate 40 emits light with the LED43a, and the user can see the characters, graphics, and the like.
A detection unit 41 (see fig. 2) for detecting a change in capacitance is located on the back surface of the operation unit 91. The detection unit 41 is composed of a plurality of sensor units 41a to 41f provided on the surface of the substrate 40 (see fig. 2), and operation unit LEDs 42a to 42d (see fig. 2) are provided in the vicinity thereof. A highly reflective material having a color tone (for example, white) is applied to the area of the surface film 90 where the detection portion 41 of the substrate 40 and the operation portion LEDs 42a to 42d are provided. This allows light from the operation portion LEDs 42a to 42d to be reflected and diffused in the same manner as the operation portion light guide plate 50. The white region is not particularly limited, and resist printing, screen printing, or the like can be used.
The surface film 90 is attached to the inner surface of the glass plate 20 in close contact with or with a slight gap therebetween. Therefore, when the display touch portion 93 is operated, the character display can be clearly confirmed from the front surface of the door 2a through the glass plate 20. That is, the door is highly visible, and the outer surface of the door is formed of the flat glass plate 20, and has excellent appearance.
The display touch unit 93 is a touch unit for displaying by lighting the operation unit 91 and the display unit 92, and when the display touch unit 93 is operated, the operation unit 91 and the display unit 92 are switched from the light-off state to the light-on state based on the detection of the sensor unit 41g (see fig. 2). That is, when the user performs an operation such as pressing, touching, or a finger approaching the display touch unit 93 (for example, a "menu" character display mark), the characters, graphics, and the like of the operation unit 91 and the display unit 92 other than the display touch unit 93, which are always visible, are switched from the light-off state to the light-on state and displayed on the glass plate 20, and the operation of the operation unit 91 can be performed. Accordingly, only the display touch unit 93 is displayed as characters, graphics, and the like that can be always seen in a normal state, and the operating unit 91 and the display unit 92 can have a simple appearance when not lit, thereby improving design. Further, the operation unit 91 and the display unit 92 are turned on only when necessary, and therefore, an energy saving effect can be obtained.
Fig. 5 is a front view of the light guide plate for operation unit. Note that fig. 5 schematically shows the light output unit with hatching added to distinguish the shape thereof.
As shown in fig. 5, the left end light output section 51a and the right end light output section 51f have the same shape, the center light output section 51c and the center light output section 51d have the same shape, and the middle light output section 51b and the center light output section 51e have the same shape.
For example, the front surface of the light guide plate 50 for operation portion is embossed (processed to form a pattern of fine wrinkles on the surface) so that the LEDs 42a to 42d for operation portion are uniformly diffused into the light guide plate 50 for operation portion. That is, since the light output units 51a and 51f are closest to the operation unit LEDs 42a to 42d, they can output strong light without condensing light, and the surface area formed by embossing is minimized. Since the light output portions 51c and 51d are farthest from the LEDs 42a to 42d for the operation portion, the surface area formed by embossing is the largest in order to collect a large amount of light. The light output sections 51b and 52e are configured such that the surface area formed by embossing is between the light output sections 51a and 51f and the light output sections 51c and 51 d.
Further, as a method for manufacturing the light output sections 51a to 51f, a method capable of performing concave-convex processing such as a laser processing method, a die forming method, a sand blast method, or the like can be appropriately selected and applied. The light output sections 51a to 51f are not limited to the uneven shape such as a relief, and a resin containing a scattering agent for visible light may be printed. Thus, when the light propagating by total reflection in the light guide plate 50 for an operation portion reaches the scattering agent, the light is scattered and can be efficiently irradiated to characters, figures, and the like.
The light output portions 51a to 51f are formed on the front surface (front surface) of the light guide plate 50 for operation portion, but are not necessarily limited to the front surface, and may be formed on the inner surface (rear surface) of the light guide plate 50 for operation portion. The light output portions 51a to 51f are provided on the surface of the light guide plate 50 for operation portion more effectively than on the inner surface of the light guide plate 50 for operation portion. This can prevent light emitted from the light output section on the inner surface of the light guide plate 50 for operation section from being absorbed by the substrate 40, and light reflected in various directions on the substrate 40 from being absorbed by the light-shielding agent of the surface film 90.
Fig. 6 is a front view showing a state where the surface film and the light guide plate for operation unit are removed from the substrate assembly.
As shown in fig. 6, the distance between the operation portion LED42a and the insertion hole 46 is L1, and the distance between the operation portion LED42a and the closest sensor portion 41f is L2, so that L1 < L2 is defined. When the distance between the operation section LED42d and the insertion hole 47 is L3 and the distance between the operation section LED42d and the nearest sensor section 41a is L4, the relationship of L3 < L4 is established.
Therefore, by disposing the insertion holes 46 and 47 close to the operation portion LEDs 42a and 42d, it is possible to reduce the error of the amount of change due to thermal expansion compared to the case where the insertion holes 46 and 47 are disposed at positions distant from the operation portion LEDs 42a and 42 d.
ΔL＝L×α×ΔT
As described above, by shortening the length L (the distance between the operation portion LED42a and the insertion hole 46), the amount of change due to thermal expansion can be reduced, and the error can be suppressed to be small. Therefore, the distance between the operation portion light guide plate 50 and the operation portion LEDs 42a to 42d can be shortened. For example, the distance L1 is preferably set to 10mm or less.
When the diameter of the insertion hole 46 into which the protrusion 52 (see fig. 5) is inserted is R1 and the diameter of the insertion hole 47 into which the protrusion 53 (see fig. 5) is inserted is R2, the relationship of R1 < R2 is established. The diameter R1 is set to a size such that the protrusion 52 is fitted into the insertion hole 46 without a gap, for example. This prevents the protrusions 52 and 53 from being damaged by excessive horizontal load when the light guide plate 50 for an operation portion expands due to thermal expansion.
In the above-described embodiment, the case where the diameter R2 of the insertion hole 47 is made larger than the diameter R1 of the insertion hole 46 has been described as an example, but the configuration is not limited to the case where the diameters are different, and one insertion hole may be formed in a long hole shape.
Fig. 7 is a front view showing a state where the surface film is removed from the substrate assembly.
As shown in fig. 7, the light guide plate 50 for operation portion is positioned on the substrate 40 by inserting the protrusion 52 into the insertion hole 46 (see fig. 6) and inserting the protrusion 53 into the insertion hole 47 (see fig. 6).
The operation portion LEDs 42a, 42b are located near the side surface 52c (right side surface) of the operation portion light guide plate 50. The operation portion LED42c is located near the side surface (wall surface) 54a of the notch 54 on the light output portion 51a side. The operation portion LED42d is located near the side surface 52e of the lower left portion of the operation portion light guide plate 50 (along the side surface 52 e). The operation portion LEDs 42a, 42b are located on the right side in the arrangement direction (the left-right direction, the width direction of the door 2a) of the sensor portions 41a to 41f, and the operation portion LEDs 42c, 42d are located on the left side in the arrangement direction (the left-right direction, the width direction of the door 2a) of the sensor portions 41a to 41 f.
In addition, in the conventional refrigerator, a substrate is mounted on a substrate case, and a light guide plate for an operation portion is further mounted on the substrate case. In this case, three errors, that is, an error in molding the substrate case, an error in molding the substrate, and an error in molding the light guide plate for the operation portion, must be taken into consideration, and the light guide plate for the operation portion and the LED for the operation portion cannot be arranged close to each other. Therefore, in the present embodiment, since only the operation portion light guide plate 50 is attached to the board 40 in a positioned manner, the operation portion LEDs 42a to 42d can be disposed closer to the operation portion light guide plate 50 by considering only the error in the molding of the board 40 and the error in the molding of the operation portion light guide plate 50.
The irradiation range Q of the operation portion LED42a is, for example, 120 degrees, and the projection 52 is disposed so as not to overlap the irradiation range Q and is located on the rear side of the irradiation range Q (the side opposite to the irradiation direction, the right side in the figure). The operation portion LED42b is similarly disposed. The operation portion LEDs 42c and 42d are similarly arranged.
Fig. 11 is a diagram showing a relationship between the position of the light output portion of the light guide plate 50 for operation portion and the irradiation range of the LED for operation portion. The operation portion LEDs 42c, 42d face the side surface 52e located on the left side of the operation portion light guide plate 50 and having one end formed with a notch at a predetermined distance. The operation portion LEDs 42c, 42d irradiate in the lateral direction in a predetermined irradiation range Q (120 degrees), and the lights overlap each other in a partial region. In the present embodiment, the irradiation regions of the two operation portion LEDs 42c, 42d overlap over at least the entire width of the vertical center 51M of the light output portion. Therefore, the upper and lower centers of the light output section can be brightly illuminated. In order to efficiently emit light from the center of the light output sections in the vertical direction, the left side of the light output section 51a located at the left end among the plurality of light output sections is preferably located close to a position R where the irradiation regions of the two operation section LEDs 42c, 42d start to overlap. On the other hand, in order to brighten the upper and lower corners of the light output section 51a up to the left end, the light output section 51a is preferably entirely housed in a portion where the irradiation regions from the two operation section LEDs 42c, 42d overlap.
In the present embodiment, two operation portion LEDs are disposed on both the left and right sides of the operation portion light guide plate 50, but three or more operation portion LEDs may be disposed, and in this case, the irradiation ranges of at least two operation portion LEDs overlap at the center in the vertical direction of each light output portion. In the case where a plurality of light output sections are provided in parallel in the vertical direction, the irradiation regions of the two LEDs adjacent to each light output section may overlap at the center in the vertical direction of each light output section.
The hole 48a into which the projection 63a formed in the substrate case 60 is inserted is circular, and the hole 48b into which the projection 63b is inserted is long. This can absorb the deformation of the substrates 40 when the substrates expand with respect to the substrate case 60.
The side surface (upper surface) 52a of the light guide plate 50 for operation portion is in contact with the lower surface 80c of the light shielding plate 80 for display portion. This allows the light guide plate 50 for display unit to be further stably held on the substrate 40.
Fig. 8 shows the relationship between the heights of the protrusion of the light guide plate for operation portion and the LED for operation portion, where (a) is a diagram before the light guide plate for operation portion is mounted on the substrate, and (b) is a diagram after the light guide plate for operation portion is mounted on the substrate.
As shown in fig. 8(a), the height H1 of the protrusion 53 of the light guide plate 50 for operation portion is formed to be larger than the height H2 of the LED42d from the surface of the substrate 40. When the light guide plate for operation unit 50 is mounted on the substrate 40 (see fig. 8 b), even if the light guide plate for operation unit 50 in the state shown in fig. 8a is mounted while being slid on the substrate 40, the side surface (end surface) of the light guide plate for operation unit 50 can be prevented from colliding with the LED for operation unit 42d, and the lens of the LED for operation unit 42d can be prevented from being damaged or falling off. Further, the operation portion LED42d in fig. 8(b) is shown to be located on the deep side of the operation portion light guide plate 50.
Here, although the relationship between the protrusion 53 and the operation portion LED42d is described as an example, the relationship between the protrusion 53 and the operation portion LED42c, the relationship between the protrusion 52 and the operation portion LED42a, and the relationship between the protrusion 52 and the operation portion LED42b are also the same as those described above. Therefore, when the light guide plate 50 for operation unit is attached to the board 40, the light guide plate 50 for operation unit can be prevented from colliding against the LEDs 42a, 42b, and 42c for operation unit, and the lenses of the LEDs 42a, 42b, and 42c for operation unit can be prevented from being damaged and falling off.
Fig. 9 is a diagram illustrating the effect of light emission efficiency, where (a) is a case where the operation portion light guide plate and the operation portion LED are close to each other, and (b) is a case where the operation portion light guide plate and the operation portion LED are far from each other.
As shown in fig. 9 b, if the distance between the side surface 52c of the light guide plate for operation portion 50 and the LED for operation portion 100 is too large (distance S2), part of the light emitted forward (upward in the drawing) from the LED for operation portion 100 does not irradiate the side surface 52c of the light guide plate for operation portion 50, which causes a decrease in light emission efficiency. Therefore, although it is conceivable to bring the operation portion LED100 close to the operation portion light guide plate 50, since three errors must be considered as described above, it is not possible to further bring the upper operation portion LED100 into close contact with the operation portion light guide plate 50. Although it is conceivable to increase the thickness of the light guide 50 for the operation portion to suppress the escape of light from the LEDs 100 for the operation portion, if the thickness of the light guide plate 50 for the operation portion is excessively increased, the number of times light is reflected in the light guide plate 50 for the operation portion is reduced, and thus it becomes difficult for light to reach the inside (the center side in the longitudinal direction).
Therefore, in the present embodiment, as shown in fig. 9(a), since the operation portion light guide plate 50 is positioned by the substrate 40, the distance S1 between the operation portion LED42a and the operation portion light guide plate 50 can be made closer to the distance S2 between the conventional operation portion LED100 and the operation portion light guide plate 50 by only considering two factors, i.e., an error in molding the operation portion light guide plate 50 and an error in molding the substrate 40. Specifically, the distance from both sides of the operation portion light guide plate 50 in the longitudinal direction to the operation portion LEDs 42a (S1) can be made shorter than the thickness of the operation portion light guide plate 50. Therefore, the light emitted upward from the operation portion LED42a can also strike the side surface of the operation portion light guide plate 50 (see fig. 9 a), and the light emission efficiency can be improved.
Although the operation portion LED42a is exemplified in the present embodiment, the other operation portion LEDs 42b, 42c, and 42d can also be used to increase the light emission efficiency by allowing the side surfaces 52c, 52e, and 54a of the operation portion light guide plate 50 to be irradiated with light emitted upward from the operation portion LEDs 42b, 42c, and 42 d.
Fig. 10 is a vertical sectional view showing a state in which the door of the board assembly is mounted. Fig. 10 shows a cross section of the door 2a with a portion of the mounting board assembly 30 cut away.
As shown in fig. 10, the door 2a is provided with a case cover 8 to which the board assembly 30 is attached. A cover (not shown) is provided on the side surface of the door 2a at a position corresponding to the housing cover 8, and the substrate assembly 30 can be attached to the housing cover 8 by removing the cover. Further, a foam heat insulator 7 is filled in the door 2a around the housing cover 8.
The housing cover 8 functions to separate the substrate assembly 30 from the foam heat insulator 7. The housing cover 8 also functions to hold the board assembly 30 in the housing cover 8 so that the front surface film 90 is in close contact with or adjacent to the glass plate 20.
In the present embodiment, the operation portion LEDs 42a to 42d and the operation portion light guide plate 50 are arranged in a direction (width direction, left-right direction) along the surface of the board 40, not in the front-back direction of the board 40, whereby the board assembly 30 can be made thin, the thickness dimension S10 of the foam heat insulator 7 filled in the back surface of the board assembly 30 can be increased, and the heat insulating performance can be improved.
Further, the inner surface of the glass plate 20 is painted with a color paint or mirror-finished. Accordingly, the foam heat insulator 7 is disposed so as not to be visible from the front side, and the operation portion 91 and the display portion 92 can be clearly seen by the operation of the display touch portion 93, thereby forming the door 2a having an excellent appearance.
As described above, in the refrigerator 1 of the present embodiment, the board assembly 30 includes: a substrate 40 provided with a detection unit 41 in which sensor units 41a to 41f are arranged in a row in the width direction, and operation unit LEDs 42a to 42d that irradiate in the lateral direction; an operation unit 91 provided on the front surface of the substrate 40 and having operation display units 91a to 91f corresponding to the sensor units 41a to 41 f; and an operation portion light guide plate 50 that guides light of the operation portion LEDs 42a to 42d to the operation display portions 91a to 91f, wherein the operation portion light guide plate 50 is positioned on the board 40 via positioning portions (the protruding portions 52 and 53 and the insertion holes 46 and 47), and the number of the operation portion LEDs 42a to 42d is smaller than the number of the sensor portions 41a to 41 f. This reduces errors in mounting the operation-unit LEDs 42a to 42d and the operation-unit light guide plate 50, and reduces the distance between the operation-unit LEDs 42a to 42d and the operation-unit light guide plate 50 compared to the conventional case. Therefore, the light emission efficiency of the operation portion light guide plate 50 can be improved, and the number of steps of the operation portion LEDs 42a to 42d can be reduced. In addition, since the number of the operation portion LEDs 42a, 42d can be reduced, the manufacturing cost can be reduced.
In the present embodiment, the positioning portion is constituted by the protrusions 52 and 53 formed on the operation portion light guide plate 50 and the insertion holes 46 and 47 formed on the substrate 40 into which the protrusions 52 and 53 are inserted, and the distances L1 and L3 between the operation portion LEDs 42a and 42d and the insertion holes 46 and 47 are set shorter than the distances L2 and L4 between the operation portion LEDs 42a and 42d and the sensor portions 41f and 41a closest to the operation portion LEDs 42a and 42d (see fig. 6). This can reduce the amount of change (error) due to thermal expansion, and can dispose the operation portion LEDs 42a to 42d close to the operation portion light guide plate 50, thereby improving the light emission efficiency.
In the present embodiment, the insertion holes 46 and 47 are formed at two locations, and the diameter of the insertion hole 47 is formed larger than the diameter of the insertion hole 46. Accordingly, when the light guide plate 50 for operation portion is deformed by thermal expansion, the load applied to the protrusions 52 and 53 can be reduced, and the protrusions 52 and 53 can be prevented from being damaged.
In the present embodiment, the light guide plate for operation unit 50 has light output sections 51a to 51f facing the operation display sections 91a to 91f and outputting light at positions corresponding to the operation display sections 91a to 91f of the front surface film 90, the LEDs 42a and 42b for operation unit are disposed on one side in the longitudinal direction of the light guide plate for operation unit 50, and the LEDs 42c and 42d for operation unit are disposed on the other side in the longitudinal direction of the light guide plate for operation unit 50. Accordingly, even when the number of the operation portion LEDs 42a to 42d is smaller than the number of the sensor portions 41a to 41f, the operation display portions 91a to 91f can be made to emit light uniformly.
In the present embodiment, the light output sections 51a to 51f are formed so as to have a larger surface area from the side closer to the operation section LEDs 42a to 42d toward the side farther from the same. Accordingly, the surface area is reduced on the side closer to the operation portion LEDs 42a to 42d, thereby reducing the light output, and the surface area is increased on the side farther from the operation portion LEDs 42a to 42d, thereby increasing the light output, thereby enabling the operation display portions 91a to 91f to emit light uniformly.
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the case where the substrate assembly 30 is disposed on the back surface (inner surface) of the glass plate 20 is described as an example, but the substrate assembly 30 may be disposed on the outermost surface.
In the above-described embodiment, the case where the detection unit 41 is provided, the detection unit 41 includes six sensor units 41a to 41f, and two operation unit LEDs 42a and 42b ( operation unit LEDs 42c and 42d) are disposed on both sides of the arrangement direction of the sensor units 41a to 41f has been described as an example, but the number of the operation unit LEDs may be five or less, or seven or more as long as the number of the operation unit LEDs is not less than the number of the sensor units. The number of the operation portion LEDs is not limited to four, and may be three or less, or five or more, as long as the number of the operation portion LEDs is not less than the number of the sensor portions.
Claims (5)
1. A refrigerator is provided with:
a door provided in the refrigerator main body;
a heat insulation member provided inside the door; and
a base plate assembly arranged at the front of the door,
the above-mentioned refrigerator is characterized in that,
the substrate assembly includes: a substrate provided with a detection section in which a plurality of sensor sections for detecting an operation are arranged, and a laterally-illuminated LED; a display member provided on the front surface of the substrate and having operation display portions corresponding to the sensor portions; and a light guide plate for guiding the light of the LED to each operation display part,
the light guide plate is positioned on the substrate through a positioning part,
the number of the LEDs is smaller than that of the sensor parts,
the positioning part comprises a convex part formed on the light guide plate and a concave part formed on the substrate and used for inserting the convex part,
the distance between the LED and the recess is set shorter than the distance between the LED and the sensor unit closest to the LED.
2. The refrigerator according to claim 1,
the above-mentioned recessed portions are formed in two portions,
one of the concave portions has a larger diameter than the other concave portion, or is formed as a long hole.
3. The refrigerator according to claim 1 or 2,
the light guide plate has a light output section for outputting light toward the operation display section at a position corresponding to each of the operation display sections,
the LEDs are arranged on both sides of the light guide plate in the longitudinal direction.
4. The refrigerator according to claim 3,
the light output section is formed so that the surface area increases from the side closer to the LED toward the side farther away from the LED.
5. A refrigerator is provided with:
a door provided in the refrigerator main body;
a heat insulation member provided inside the door; and
a base plate assembly arranged at the front of the door,
the above-mentioned refrigerator is characterized in that,
the substrate assembly includes: a substrate provided with a detection section in which a plurality of sensor sections for detecting an operation are arranged, and a laterally-illuminated LED; a display member provided on the front surface of the substrate and having operation display portions corresponding to the sensor portions; and a light guide plate for guiding the light of the LED to each operation display part,
the LEDs are arranged at a predetermined distance from both ends of the light guide plate in the longitudinal direction,
the predetermined distance is shorter than the thickness of the light guide plate.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-143874 | 2016-07-22 | ||
| JP2016143894A JP2018013305A (en) | 2016-07-22 | 2016-07-22 | refrigerator |
| JP2016-143894 | 2016-07-22 | ||
| JP2016143874A JP6633987B2 (en) | 2016-07-22 | 2016-07-22 | refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107642940A CN107642940A (en) | 2018-01-30 |
| CN107642940B true CN107642940B (en) | 2020-05-15 |
Family
ID=61109995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710135703.9A Active CN107642940B (en) | 2016-07-22 | 2017-03-08 | Refrigerator with a door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107642940B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866437A (en) * | 2005-05-19 | 2006-11-22 | 三星电子株式会社 | Keypad and keypad assembly |
| CN101211700A (en) * | 2006-12-26 | 2008-07-02 | 阿尔卑斯电气株式会社 | Mobile joint unit for switch and switch device using the same |
| CN201112172Y (en) * | 2007-03-16 | 2008-09-10 | 开瑞福电子材料(深圳)有限公司 | Printing type light conducting plate for electronic product press keys light source |
| JP2010113904A (en) * | 2008-11-05 | 2010-05-20 | Fujikura Ltd | Planar light emitting device, electronic equipment, and manufacturing method of planar light emitting device |
| CN101796443A (en) * | 2007-09-06 | 2010-08-04 | 3M创新有限公司 | Lightguides having light extraction structures providing regional control of light output |
| CN104422246A (en) * | 2013-09-10 | 2015-03-18 | 日立空调·家用电器株式会社 | Refrigerator |
| CN104427760A (en) * | 2013-09-10 | 2015-03-18 | 株式会社小糸制作所 | Printed circuit board and vehicular lamp |
| CN104781623A (en) * | 2012-08-28 | 2015-07-15 | 株式会社东芝 | Refrigerator |
| CN105300022A (en) * | 2015-11-12 | 2016-02-03 | 四川长虹电器股份有限公司 | Lamp panel for inner illumination of refrigerator or light-emitting decoration |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6131507B2 (en) * | 2013-02-22 | 2017-05-24 | パナソニックＩｐマネジメント株式会社 | LED module and lighting apparatus |
-
2017
- 2017-03-08 CN CN201710135703.9A patent/CN107642940B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866437A (en) * | 2005-05-19 | 2006-11-22 | 三星电子株式会社 | Keypad and keypad assembly |
| CN101211700A (en) * | 2006-12-26 | 2008-07-02 | 阿尔卑斯电气株式会社 | Mobile joint unit for switch and switch device using the same |
| CN201112172Y (en) * | 2007-03-16 | 2008-09-10 | 开瑞福电子材料(深圳)有限公司 | Printing type light conducting plate for electronic product press keys light source |
| CN101796443A (en) * | 2007-09-06 | 2010-08-04 | 3M创新有限公司 | Lightguides having light extraction structures providing regional control of light output |
| JP2010113904A (en) * | 2008-11-05 | 2010-05-20 | Fujikura Ltd | Planar light emitting device, electronic equipment, and manufacturing method of planar light emitting device |
| CN104781623A (en) * | 2012-08-28 | 2015-07-15 | 株式会社东芝 | Refrigerator |
| CN104422246A (en) * | 2013-09-10 | 2015-03-18 | 日立空调·家用电器株式会社 | Refrigerator |
| CN104427760A (en) * | 2013-09-10 | 2015-03-18 | 株式会社小糸制作所 | Printed circuit board and vehicular lamp |
| CN105300022A (en) * | 2015-11-12 | 2016-02-03 | 四川长虹电器股份有限公司 | Lamp panel for inner illumination of refrigerator or light-emitting decoration |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107642940A (en) | 2018-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5897932B2 (en) | refrigerator | |
| CN107560276B (en) | Refrigerator with a door | |
| KR101132463B1 (en) | Refrigerator door with hidden display | |
| EP2320181B1 (en) | Refrigerator | |
| TWI550244B (en) | Refrigerator | |
| JP6012567B2 (en) | refrigerator | |
| JP6219026B2 (en) | refrigerator | |
| TWI632405B (en) | Display device and refrigerator having the same | |
| JP5740282B2 (en) | Display device | |
| TWI642885B (en) | Display device and refrigerator having the same | |
| JP2018013305A (en) | refrigerator | |
| CN107642940B (en) | Refrigerator with a door | |
| JP2014126304A (en) | Refrigerator | |
| JP6071334B2 (en) | refrigerator | |
| JP6633987B2 (en) | refrigerator | |
| JP6030388B2 (en) | refrigerator | |
| JP6118712B2 (en) | refrigerator | |
| JP6591506B2 (en) | refrigerator | |
| JP6912533B2 (en) | refrigerator | |
| JP6342130B2 (en) | refrigerator | |
| JP7280311B2 (en) | refrigerator | |
| JP2018128239A (en) | refrigerator | |
| CN210772964U (en) | Refrigeration device | |
| KR102656496B1 (en) | Refrigerator | |
| JP2014031956A (en) | Refrigerator and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Tokyo, Japan, Japan Applicant after: Hitachi Global Living Program Co., Ltd. Address before: Tokyo, Japan, Japan Applicant before: Hitachi Household Electric Appliance Co. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |