JPH05317576A - Display device - Google Patents

Abstract

PURPOSE:To prevent the wraparound and intrusion of a potting material to a display part by including an electrooptical display means and a control circuit board into a potting case of an approximately box shape, embedding a gelatinous resin therein and hermetically sealing the gap between the rear surface and the display means by providing a sealing part on the outer periphery of the display means. CONSTITUTION:The electrooptical display means 85, such as LED, liquid crystal or fluorescent display tube, is included together with the control circuit board 89 in a circuit board support 87 of an approximately box shape which is the potting case. The gelatinous resin 90 is poured therein. The resin wrapes around the display part when the resin is simply poured in. The resin 90 intrudes into the display part in the worst case and the display part clouds. The hardly visible display is then resulted and the defective product is produced. The constitution to provide a gap G between the surface 86 of the electrooptical display means 85 and the circuit board support 87 and to hermetically seal the gap G by applying a double-coated tape between the outer periphery of the surface of the display means 86 and the circuit board support 87 is adopted as against the above, by which the wraparound and intrusion of the potting material to the display part are prevented and the trouble of the display is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a display device for displaying, for example, contents of a setting course of a washing machine, progress status up to now, what is currently being done by characters or pictorial display.

[0002]

2. Description of the Related Art Conventionally, washing machines and other equipment have been
An electro-optical display means such as an ED, a liquid crystal display or a fluorescent display tube is added to convey a message to a user by displaying characters or pictures.

Also, like a washing machine installed in a bathroom,
The control board of a device that is used for a long time in a humid environment is treated with a moisture resistance so that it can withstand use even in this severe environment.

The moisture resistance treatment of the control board is carried out by encapsulating the control board in a substantially box-shaped potting case and pouring a gel-like resin such as colored urethane into the potting case to prevent insulation deterioration due to water droplet adhesion. It is to protect the control board.

A prior art relating to the potting of electronic parts is described in, for example, Japanese Patent Application Laid-Open No. 51-80799.

[0006]

However, when the gel-like resin is poured into the potting case of the display device in which the electro-optical display means such as the LED is connected to the control board, the gel-like potting material is The gel-like potting material penetrates into the display unit in the worst case and the surface of the display unit becomes turbid, making the display difficult to see and making it a defective product. There is a drawback that the so-called yield, which is the ratio of manufactured products to

The object of the present invention is to eliminate the drawbacks of the prior art described above, and to prevent the potting material from wrapping around the display section for displaying characters and pictures by means of electro-optical display means such as LEDs. An improved display device that measures the moisture resistance of the substrate by potting, protects the control substrate from environmental deterioration factors, and eliminates the problem that the display on the display part becomes murky and disappears and improves the material yield. To provide.

[0008]

The above-mentioned object is to provide a display device having electro-optical display means such as an LED, a liquid crystal, a fluorescent display tube, etc., and enclosing the display means together with a control board in a substantially box-shaped potting case. In addition to the configuration in which the gel-like resin is embedded in the potting case, a gap is formed between the back surface of the potting case and the surface of the display means, and a seal portion is provided on the outer periphery of the display means to seal the gap. Is achieved by

[0009]

According to the present invention having the above structure,
The electro-optical display means such as an LED can prevent the potting material from wrapping around and infiltrating into the display portion for displaying characters and pictures.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

2 to 4, a rotary base 4 is vibration-supported by a suspension rod 2 and a vibration-proof spring 3 inside a box-shaped outer frame 1 made of a steel plate. The rotating base 4 is rotatably attached to the outer tank 6.

Similar to the turning base 4, the turning beam 5 has one end rotatably attached to the outer tub 6, and the other end of the turning beam 5 is attached to a turning motor mechanism described later. ing.

Inside the outer tub 6, a basket 7 having a substantially circular cross section and serving as a washing tub, a dehydrating tub and a drying drum is provided.

A balance ring 8 is attached to the upper end of the basket 7 by means of ultrasonic welding or the like.

On the inner wall of the basket 7, the basket 7
There are provided a plurality of vertical rib-shaped lifters 7a for scraping up the cloth when tilting to dry, and a large number of vertical grooves 7b. A large number of dehydration holes 7c are provided in the vertical groove 7b.

At the center of the inner bottom of the basket 7, a recess 7d for rotatably mounting the pulsator 9 is provided.

At the upper end of the outer tub 6, the outer tub 6 and the basket 7 are provided.
The tub cover 10 is fixed in order to prevent the laundry from falling.

A drain valve 11 is attached to the outer bottom of the outer tank 6.

The rotary drive unit 12 includes a steel plate base 13
Is attached to.

The base 13 is formed in a substantially box shape and is fixed to the outer tank 7 by means of screws or the like.

One end of the internal drainage hose 15 is connected to the drainage valve 11, and the other end is opened on a base 16 provided in the lower portion of the outer frame 1.

The base 16 has a plurality of legs 16 at the bottom thereof.
a, a holding portion 16b of the outer frame 1, a water receiving portion 16c, and a drain port portion 16d.

The water receiving portion 16c is inclined toward the center, and the water discharged from the drain hose 15 is discharged from the drain outlet portion 16d. The water from the discharge port 16d is discharged to the outside through the external drain hose 20.

A rib 16e is provided on the outer periphery of the water receiving portion 16c so that water does not overflow.

Washing / dewatering motor 17 and drying motor 1
8, the speed reducer 19 for washing, and the speed reducer 14 for drying are attached to the bottom of the outer tub 6 via the base 13.

A rotating arm 22 is attached to the output shaft of the rotating motor 21, and one end of the rotating beam 5 is rotatably attached to the rotating arm 22.

A shaft base 23 is provided in the outer tub 6 by means of a screw or the like, and a beam receiver 24 is formed by extending a part of the shaft base 23.

The other end of the rotating beam 5 is rotatably supported by the locking portion 25 of the beam receiver 24.

The outer tub shaft 26 is attached to the shaft base 23, and the outer tub shaft 26 is attached to the bearing portion 2 of the rotating base 4.
It is rotatably supported by 7.

The switch lever 40 is provided integrally with the outer tank shaft 26, and the switch lever 40 includes a micro switch (H) 41 and a micro switch (V) 42.
Is mounted so as to engage with.

The duct 44 is for circulating hot air during the drying process, and one end of the duct 44 has an exhaust portion 6b of the outer tank 6.
The other end is airtightly connected to the intake port 45a of the blower 45.

The central inner diameter portion 44a of the duct 44 is the outer tank 6
It is configured to be higher than the upper end portion 47 of the overflow port 46 of the overflow rinse provided integrally with the H dimension by H dimension so that the washing water does not enter the blower 45.

A nozzle 50 is installed inside the duct 44, and water introduced via a hose 49 is sprayed into the duct 44. That is, during the drying process, the hot air in the basket 7 is guided into the duct 44 in order to prevent the moisture-containing air from circulating from the clothes.
Water is sprayed onto the hot air passing through it to condense and collect the moisture in the hot air.

One end of the blower guide 52 is attached to the exhaust side of the blower 45, and the other end is connected to the heating unit 51.

Further, the heating unit 51 has an in-tank exhaust port 53.

In the above construction, the washing process of washing-rinsing-dewatering is performed with the outer tub 6 and the basket 7 standing upright. In addition, this position detection is performed by the switch lever 4
This is done by engaging 0 with the microswitch (V) 42.

Next, the drying process is started. In this drying process, the basket 7 is tilted to a substantially horizontal position as in a normal drum type dryer. That is, in this operation, the rotating arm 22 is rotated by the rotating motor 21, and the rotating beam 5 which is an element of a so-called link mechanism.
It is done by moving. In addition, the switch lever 40 detects the rotation angle by the micro switch 41.
This is done by engaging with (H).

When a predetermined drying process is carried out,
The outer tank 6 and the basket 7 are returned to the upright position by the operation reverse to the above.

At the upper part of the outer frame 1, a top cover 80 having a clothes insertion port at the center is provided, and at the center of the top cover 80, an operation display section 82 is provided on the front side of a lid 81.

The operation display section 82 is composed of an operation section 83 such as a push button and a display section 84 including electro-optical display means such as an LED. The push button of the operation section 83 changes the display section 84. ..

The display section 84 shows the contents of the set course, the progress status up to now, what is currently being done, etc. by characters, pictorial display and the like.

The display section 84 will be described in detail below.

The display section 84 comprises an electro-optical display means such as an LED, a liquid crystal, a fluorescent display tube or the like.

In the illustrated embodiment, the fluorescent display tube 8
5 is electrically connected to a control board 89 via a partition plate 88.

Reference numeral 96 denotes a lead portion provided on one side of the fluorescent display tube 85. The fluorescent display tube 85 and the partition plate 88 are attached to the control board 89 in a state in which both are fixed by adhesion or the like. ..

The partition plate 88 is provided with a receiving portion 97 for keeping the distance between the fluorescent display tube 85 and the control substrate 89 constant, and on the other side of the lead portion 96. Is fixed to the control board 89 by a melon 98.

The fluorescent display tube 85 and the control board 89 are contained in a substantially box-shaped board support 87 which is a potting case.

The substrate support 87 is made of a semitransparent resin such as smoke, and is fixed to the top cover 80 by a plurality of melons 91 and screws 94.

A decorative plate 95 is bonded to the engaging portion between the top cover 80 and the substrate support 87.

By the way, the control board of a device such as a washing machine installed in a bathroom which is used for a long time in a humid environment is treated with a moisture-proof material so that it can be sufficiently used even in this severe environment. Is given.

The moisture-proof treatment of the control board is performed as shown in FIG.
As shown in FIG. 7, the control board 89 is enclosed in a substantially box-shaped board support 87 which is a potting case, and a gel-like resin 90 made of colored urethane or the like is poured into the board support 87.

However, when the gel-like resin 90 is simply poured into the substrate support 87, the gel-like resin 90 wraps around the display section, and in the worst case, the resin 90 enters the display section and displays the display. The surface of the part becomes cloudy and the display becomes difficult to see, resulting in a defective product.

On the other hand, in the illustrated embodiment, the distance between the surface 86 of the fluorescent display tube 85 and the substrate support 87 is 0.
A gap G of 2 to 2 mm is provided, and a double-sided tape is laid between the outer periphery of the surface 86 of the fluorescent display tube and the substrate support 87 to seal the gap G.

[0054]

The present invention is as described above, and in the present invention, in a display device having electro-optical display means such as LEDs, the display means is enclosed together with a control board in a substantially box-shaped potting case, In addition to the configuration in which a gel-like resin is embedded in the potting case, a gap is formed between the back surface of the potting case and the surface of the display means, and a seal portion is provided on the outer periphery of the display means to seal the gap. According to the present invention, the electro-optical display means such as the LED prevents the potting material from wrapping around the display portion for displaying characters and pictures, thereby preventing the control board from being damp-proof by potting. In addition, while protecting the control board from environmental factors, it is possible to improve the yield of materials by eliminating the problem that the display on the display part becomes murky and invisible. Can, it is possible to obtain an improved display device.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a display device according to the present invention.

FIG. 2 is a specific example of a washing machine to which the present invention is applied,
It is an internal structure figure seen from the right side.

FIG. 3 is an internal structural diagram of FIG. 2 viewed from the back side.

FIG. 4 is an internal structural view of a portion different from FIG. 2 viewed from the right side surface.

5 is a plan view of the washing machine including an operation display unit indicated by reference numeral 84 in FIG. 1. FIG.

6 is a plan view showing in detail the display contents of a washing machine operation display section 84 shown in FIGS. 1 and 5. FIG.

[Explanation of symbols]

85 ... Fluorescent display tube, 86 ... Fluorescent display tube surface, 87 ... Substrate support (potting case), 88 ... Partition plate, 8
9 ... Control board, 90 ... Resin (potting material).

Claims (1)

[Claims] 1. A display device comprising an electro-optical display means such as an LED, a liquid crystal, a fluorescent display tube or the like, wherein the display means is enclosed in a substantially box-shaped potting case, and a gel-like resin is embedded in the potting case. In addition to the configuration
A display device characterized in that a gap is formed between the back surface of the potting case and the front surface of the display means, and a seal portion is provided on the outer periphery of the display means to seal the gap.