JPH0527691A - Display device - Google Patents

Abstract

PURPOSE:To decrease the man-hours of assembly and reduce the manufacture cost of the display device which is so constituted as to light individual display plates from behind by plural light emission bodies connected to a substrate through individual lead wires serving as support legs and make displays on the top sides. CONSTITUTION:A support plate 5 is fixed on the substrate 3 at a proper distance. A light emitting diode(LED) 1 is inserted into a holding hole 50 penetrating the support plate 5 while the side of a lead wire 10 is held at the head, and while this lead wire 10 is inserted into a specific position on the substrate 3, the base part 1b of the LED1 is fitted in the holding hole 50. This operation is carried out while the surface of the substrate 3 is observed through an observation hole 51 which is opened closely to the holding hole 50. Then the upper part of the support plate 5 is covered with an LED cover 2, the head part 1a of the LED 1 is fitted in a fitting-in hole 24 formed in the bottom surface 21 of a storage chamber 20, and the LED l is clamped and fixed between the peripheral edge of the fitting-in hole 24 and the peripheral edge of the holding hole 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device used in various electric products as a message board for displaying operating conditions and the like.

[0002]

2. Description of the Related Art In an electric product such as a washing machine, a back surface of a display plate fixed on an operation panel is illuminated by a light-emitting body so that the display content on the surface of the display plate is displayed brightly. Display devices are widely used. A conventional display device of this type is disclosed in Japanese Utility Model Publication No. 60-9830, FIG. 1 is an exploded perspective view thereof, and FIG. 2 is an enlarged longitudinal sectional view of the same.

As shown in these figures, a conventional display device has a plurality of LEDs (light emitting diodes) 1, 1 ... Which function as light emitters, and which are isolated from each other for accommodating the LEDs 1, 1. A plurality of storage chambers 20, 20 ... Integrally formed integrally with each other, a resin-made LED cover 2, a substrate 3 provided with a circuit for display, and a light-transmissive display on which display contents are written. And the plate 4.

In the LED cover 2, a plurality of engaging legs 2a, 2a ... (Only one is shown) protruding on one side are engaged with the engaging holes 3a, 3a. It is fixed in a state of being separated from the surface by a predetermined length. Each storage room 20 as shown in FIG.
Is a tapered reflection surface 22 between a rectangular opening 21 arranged in a plane substantially parallel to the surface of the substrate 3 due to the fixing of the LED cover 2 described above and a rectangular bottom surface 21 smaller than these.
And a fitting hole 23 having a circular cross section is formed on each bottom surface 21 so as to penetrate the front and back surfaces.

The LED 1 serving as a light-emitting body is inserted from the upper side (opening) side of each storage chamber 20 formed in the LED cover 2 fixed as described above, with the lead wire 10 also serving as a supporting leg inserted first, While inserting the tip of the lead wire 10 into the small-diameter connection hole 30 formed in the substrate 3, the lead wire 10 inserted into each connection hole 30 is fitted and fixed in the fitting hole 23 of each storage chamber 20.
For example, it is connected to a predetermined position on the substrate 3 by being fixed in the vicinity of the connection hole 30 by soldering from the back surface side. In this way, all the LEDs 1, 1 ... Are stored in the storage chambers 20, 20 ... And connected to the substrate 3, and then the openings of the storage chambers 20, 20. The display plate 4 is fixed to the upper surface of the display device, and a plurality of display blocks as shown in FIG.

When the appropriate LED 1 is turned on in this state, the light emitted from the LED 1 is reflected by the reflection surface 22 of the storage chamber 20 for storing the LED 1 and concentrated on the back surface of the display board 4. As a result of the irradiation, only a portion of the display plate 4 corresponding to the storage chamber 20 becomes bright, and the user visually recognizes the display content written in this portion, and the user is informed of the driving state, the next operation instruction, and the abnormality. You can easily know the occurrence.

[0007]

However, in the assembling of the display device performed as described above, the LED 1 is inserted into the storage chamber 20 of the LED cover 2 fixed on the substrate 3 and the L
When inserting the lead wire 10 of the ED 1 into the corresponding connection hole 30 on the substrate 3, this work is performed through a slight gap between the lead wire 10 and the lower surface of the LED cover 2, that is, at a position close to the surface of the substrate 3. In order to ensure the insertion of the lead wire 10 into each connection hole 30, it is necessary for even a skilled worker to make a check. However, this has been a factor that hinders the reduction of product cost.

As another configuration, the LE is first formed on the substrate 3.
D1,1 ... are connected, and LEDs are provided on the LEDs 1,1 ... Standing on the substrate 3 by separate lead wires 10,10.
There is a cover 2 which is fixed to cover the LED 1. In this case, when fixing the LED cover 2, the LED 1,
1 and the corresponding storage chambers 20, 20 ... Fitting holes 2 at the bottom
It is difficult to align with 3, 23, ..., Workability is extremely poor, and the LEDs 1, 1 ... Are pressed from above by the LED cover 2 at the time of assembly.
The connection parts of ... Are prone to damage and the rate of occurrence of defective products is high. Therefore, the configurations shown in FIGS. 1 and 2 are exclusively used.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a display device capable of significantly reducing the number of assembling steps and reducing the product cost.

[0010]

A display device according to the present invention illuminates each display panel from the back side by a plurality of light-emitting bodies connected to a substrate through each lead wire which also serves as a supporting leg, and front side. In the display device adapted to display each of the above, a plurality of holding holes which are fixed and spaced on the substrate by an appropriate length, and which are aligned and opened at the connection positions of the light emitters, and A support plate having a peephole that opens in close proximity to the support plate is fixed on the substrate in such a manner as to cover the entire upper portion of the support plate, and the support plate is isolated from each other at a position aligned with each of the holding holes. And a light emitter cover formed by integrally forming a plurality of storage chambers each having a fitting hole for the light emitter on the bottom surface thereof.

[0011]

In the present invention, first, the supporting plate having the luminous body holding holes is fixed on the substrate, and the luminous body is inserted while observing the surface of the substrate from above through the peep holes formed in the supporting plate. After performing the connection work, the luminous body covers are covered from above, and the luminous bodies are sandwiched between the fitting holes formed in the luminous body covers at the bottoms of the storage chambers and the holding holes of the support plate. Fix it.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments. FIG. 3 is an exploded perspective view of the display device according to the present invention, and FIG. 4 is an enlarged vertical cross-sectional view of the main part of the same.

The display device according to the present invention has a plurality of LEDs (light emitting diodes) 1, 1 ...
A resin LED cover 2 integrally formed with a plurality of isolated storage chambers 20, 20 for individually storing these LEDs 1, 1 ... And a circuit for display are provided. A substrate 3 and a light-transmissive display plate 4 on which display contents are written are provided, and an LED is provided between the LED cover 2 and the LED cover 2.
A support plate 5 for supporting the terminals 1, 1, ... Is provided.

In the LED cover 2 of the present invention, as in the conventional case, a plurality of engaging legs 2a, 2a ... (Only one is shown) provided on one side are engaged with the engaging holes 3a, 3a. They are joined together and fixed in a state of being separated from the surface of the substrate 3 by a predetermined length. Each storage chamber 20 formed in the LED cover 2 also has a rectangular opening arranged in a plane substantially parallel to the surface of the substrate 3 by fixing the LED cover 2 and a bottom surface 21 having a smaller rectangular shape as in the conventional case. And a shape in which these are connected by a reflecting surface 22 having a tapered shape. Further, in the center of the bottom surface 21 of each storage chamber 20, there is formed a fitting hole 24 penetrating the front and back sides, which is smaller in diameter than the fitting hole 23 in the conventional display device. As shown,
The size is such that only the head 1a of the LED 1 can be loosely fitted.

The support plate 5 has a rectangular flat plate shape,
Four support legs 5a, 5a (2 on the shape side) protruding from the four corners
.. are inserted into the insertion holes 3b, 3b ... Of the substrate 3 for a predetermined length, and are fixed substantially parallel to a position separated from the surface of the substrate 3 by a predetermined length. The support plate 5 has circular cross-section holding holes 50, 50 at positions that respectively match with the fitting holes 24, 24 ... In the housing chambers 20, 20 ...
However, as shown in the drawing, it is formed in rows and columns extending in the vertical and horizontal directions so as to penetrate the front and back sides, and at the position close to one side of each of the holding holes 50, 50 ... Peep holes 51, 51 ... Having a rectangular cross section and having an appropriate length in the extension direction are formed in the same manner as penetrating the front and back sides. As shown in FIG. 4, the holding hole 50 is a stepped hole into which the base portion 1b of each LED 1 can be inserted from its upper portion for an appropriate length.

In assembling the display device according to the present invention having the above-mentioned structure, the support plate 5 is fixed on the base 3, and then the LEDs 1, 1 ... And the lead wires 10, 10 ... Which also serve as support legs.
, First, into each of the holding holes 50, 50, and the leading ends of the lead wires 10, 10 ... into the small-diameter connection holes 30, 30 ... LED1, 1
First, the work of fitting the base portions 1b, 1b of ... Into the holding holes 50, 50.

At this time, the assembling operator can observe the vicinity of the connection hole 30 into which the lead wire 10 is inserted from above through the peep hole 51 that is opened close to each holding hole 50. Reliable insertion can be performed quickly. Then, after this, the lead wires 1 inserted in the respective connection holes 30, 30 ...
When the tips of 0, 10 ... Are fixed near the connection hole 30 by, for example, automatic soldering from the back side, the LEDs 1, 1
Are restrained between the substrate 3 and the support plate 5.

After that, when the LED cover 2 is covered on the support plate 5, the LED supported by the support plate 5 is used.
The heads 1a, 1a of the terminals 1, 1, ... Are correctly aligned with the fitting holes 24, 24 of the storage chambers 20, 20 corresponding to the holding holes 50, 50. The engaging hole on the substrate 3
By fitting the heads 1a, 1a ... Into the fitting holes 24, 24. Is held between the peripheral edge of the holding hole 50 and the peripheral edge of the fitting hole 24,
Securely fixed in the vertical and horizontal directions.

Finally, the display plate 4 is fixed to the upper surface of the LED cover 2 in such a manner as to collectively cover the openings of the storage chambers 20, 20 ... In which the LEDs 1, 1 ...
A display device according to the present invention is constituted by arranging a plurality of display blocks as shown in FIG. Then, when the appropriate LED 1 is turned on in this state, the light emitted from the LED 1 is reflected by the reflecting surface 22 and is radiated to the back surface of the display plate 4 in a concentrated manner. Only a considerable part of the storage room 20 becomes bright, and the display contents written in this part can be visually recognized. The display content of each part of the display board 4 can be appropriately set. For example, in the case of a display device for a washing machine, washing, dehydration,
It may be used for a process display such as drying, an instruction for the next operation, an abnormality occurrence display, etc., and the user can easily perform a driving operation by visually recognizing these displays.

In this embodiment, L is used as the light emitter.
Although the ED1 is used, the present invention is not limited to this, and the shapes of the LED cover 2 and the support plate 5 which are light emitter covers are not limited to those shown in the present embodiment, and other shapes such as a circle and a polygon may be used. It may have a shape.

[0021]

As described above in detail, in the display device according to the present invention, the supporting plate having the holding holes for the light emitters is first fixed on the substrate, and the surface of the substrate is moved upward through the peep holes formed in the supporting plate. While observing from above, insertion of the luminous body into the holding hole and connection work to the substrate are performed, so these works can be performed reliably and quickly, and then the luminous body cover is placed on the upper part of the support plate. Since the light emitting bodies are sandwiched and fixed between the fitting holes formed in the light emitting body cover at the bottoms of the storage chambers and the holding holes of the support plate, the light emitting bodies can be securely fixed and the number of assembling steps can be significantly reduced. The present invention has excellent effects such as a large reduction and a reduction in product cost associated therewith.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a conventional display device.

FIG. 2 is an enlarged vertical sectional view of a main part of a conventional display device.

FIG. 3 is an exploded perspective view of a display device according to the present invention.

FIG. 4 is an enlarged vertical cross-sectional view of a main part of a display device according to the present invention.

[Explanation of symbols]

 1 LED 2 LED cover 3 Substrate 4 Display plate 5 Support plate 10 Lead wire 20 Storage chamber 24 Fitting hole 50 Holding hole 51 Peep hole

Claims (1)

Claims: 1. Each display panel is illuminated from the back side by a plurality of light-emitting bodies connected to the substrate via the respective lead wires also serving as support legs, and the respective displays are displayed on the front side. In the display device adapted to perform the above, a plurality of holding holes which are fixed and spaced apart from each other on the substrate by an appropriate length and are aligned and opened at the connection positions of the light emitters, and a peep which is opened close to these A support plate having holes formed therein is fixed on the substrate in such a manner as to cover the entire upper portion of the support plate, and the support plate is separated from each other at a position aligned with each of the holding holes. A display device comprising: a light-emitting body cover integrally formed with a plurality of storage chambers each having a fitting hole for the light-emitting body on a bottom surface thereof.