JPH0630098A - Communication terminal - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a communication terminal device having a key switch, which can efficiently display a display formed on a key top surface of the key switch by projection light from an internal light emitting element. At the same time, reduce the number of components for that purpose and make it thinner. A housing 67 is provided inside the housing 67, which has a hole 71 for allowing the surface of the key top 76 to be seen through to the outside and which is made of a light-guiding resin whose outer surface is opaque. It has a circuit board 51, a switch sheet 52 and a light emitting element 87 arranged on the circuit board 51, a protrusion 85 and a key top holding portion 73 which can press the switch sheet 52, and is made of a light guiding rubber. Rubber holder 75
And a key top 76 which is fitted to the key top holding portion 73 of the rubber holder 75 and which is made of a light-guiding resin whose outer surface is opaque-treated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal device equipped with a key switch, which can efficiently display a display formed on the surface of a key top of the key switch by projecting light from an internal light emitting element. In addition, the present invention relates to a new communication terminal device in which the number of components for that purpose is reduced and the device is made thinner.

It is possible to transmit and receive to and from a communication terminal device that is used by being mounted on a telephone or other portable type or moving body, and it is possible to operate the operation unit even in a dark place. From the viewpoint of knowing, it is necessary that various information is illuminated and displayed.

Other than the above-mentioned telephones, such communication terminal devices include portable radio telephone devices and car telephone devices.
In any case, it is highly reliable because the electrical circuits and structural parts are mounted with high density and multifunction, and it is also small in size and weight, easy to assemble and adjust, and low in cost. It is required to be.

[0004]

2. Description of the Related Art A conventional communication terminal device is shown in FIG. Figure 6
[Fig. 3] is an exploded perspective view of only a main part of a handset unit for communication of a car telephone device. In the figure, electronic components and the like that compose a telephone are mounted and mounted on a circuit board 1 made of a printed board. A large number of switch patterns (not shown) are formed in the center of the circuit board 1 in the XY directions.

A rubber switch 3 for switching the switch pattern is mounted, and a light guide plate 8 having holes 6 through which a large number of protrusions 5 of the rubber switch 3 are formed is mounted on the rubber switch 3. The key tops 9 are fitted to all the protrusions 5 of the rubber switch 3 protruding above the light guide plate 8. The light guide plate 8 is fixed to the circuit board 1 by screws 10 from below the circuit board 1.

A backlight 11 for illumination is mounted on the left side of the circuit board 1 in the figure, and a liquid crystal display device 12 is mounted on the backlight 11 via a rubber connector 15. Fixed to. Liquid crystal display device 12
Is electrically connected to the circuit board 1 by a rubber connector.
On the right side, a speaker 18 for calling is provided on the circuit board 1.
It is attached by being fitted into the hole of.

A speaker 23 for receiving a voice is attached to the left side of the figure in the first casing 21 on the lower side of the figure, and a microphone 25 for a voice transmission is attached to the right side of the figure via a cushioning rubber 26. The circuit board 1 is arranged from above, and the circuit board 1
The speaker 23 and the microphone 25 are connected to the respective connectors. Then, the circuit board 1 is first screwed
It is attached and fixed to the housing 21 of the.

The first housing 21 and the second housing 2 on the upper side in the drawing
8 are fitted around each other, and are attached by one screw 29 penetrating the first housing 21 and the circuit board 1 to be integrated with each other. After tightening the screw 29, the first housing 21 is tightened.
It is covered with the rubber plug 30 embedded therein to prevent the rubber plug 30 from being disassembled.

A window hole 31 through which the liquid crystal display device 12 can be seen is provided on the left side of the second casing 28 in the figure, and a transparent window plate 32 is previously fixed and adhered thereto from the front side. A large number of through holes 33 for projecting the key tops 9 are formed in the central portion, and the upper surfaces of the key tops 9 project from the through holes 33. On the right side, there is a sounding hole 34 for making a ringing sound from the speaker 18.

At the right end of the figure, a curl cord 36 for connecting to a control device (not shown) or a transmitter / receiver body is shown.
Are connected and attached. This will be described with reference to the side cross section of FIG. 7 showing only the main part of the switch section. A large number of switch patterns 40 are formed in the X-Y direction on the upper surface of the circuit board 1. The rubber switch 3 corresponding to the switch patterns 40 is provided with the conductive rubber 41 on the lower surface, and the key top 9 is pushed down. The thin plate portion 43 of the rubber switch 3 is flexibly deformed and the conductive rubber 41 comes into contact with the switch pattern 40 to short-circuit the switch pattern 40.

When the key top 9 is released, the thin plate 43 is released.
The conductive rubber 41 is separated from the switch pattern 40 by being restored by the restoring force of the portion. A light emitting diode (LED) 45 is provided between the switch patterns 40 adjacent to each other on the circuit board 1.
It is mounted and mounted on top, and emits light upward.
This light emission spreads inside the light guide plate 8 and is transmitted to the inside of the rubber switch 3 from the hole 6 of the light guide plate. The rubber switch 3 is a semitransparent silicone rubber having a light guiding property,
It can easily transmit light. Therefore, light is transmitted to the inside of the protrusion 5 and illuminates the inside of the key top 9 from its lower surface.

The key top 9 is a transparent synthetic resin molded product, and the outer surface is subjected to an opaque surface treatment.
Various display symbols are formed in a transparent state. It is possible to recognize this display symbol and the like in the dark by the irradiation light. The second housing 28 is formed in a lattice shape having holes 33 so that the key top 9 can be seen, and is a molded product of an opaque synthetic resin material such as black.

[0013]

According to the above-mentioned conventional communication terminal device, all the components except the speaker 23 for reception and the microphone 25 for transmission are mounted on the circuit board 1, and the circuit board 1 is attached to the first casing 21. The screw 27 is attached and fixed. Therefore, the second housing 28 is
All key tops 9 while fitting into the case 21 of
There is a problem in that it is difficult to assemble the second housing 28 by fitting it to the hole 33 of the second housing 28.

As described above, the circuit board 1 is provided in the first housing 21.
With the configuration in which the key is attached and fixed, the surface of the key top 9 of the circuit board 1 can be seen when the second housing 28 is removed. Since the surface of the key top 9 occupies most of the area of the circuit board 1, it is difficult to inspect and maintain the circuit because the back surface on which the main circuit components are mounted cannot be seen immediately. .

Further, since the window plate 32 attached to the window hole 31 of the second housing 28 is attached from the outside, the periphery of the window plate 32 is colored so that the unevenness of the adhesive cannot be seen. There was also a problem that the size of the window was reduced by that amount because the unevenness was hidden.

Further, since the rubber switch 3 having a large stroke of the switch operation and the light guide plate 6 are used, it is difficult to reduce the thickness of the switch portion, and the cost of the light guide plate increases. was there.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a communication terminal device which solves the above-mentioned problems of the prior art and which has a good assembling property and which allows the switch portion to be thin.

[0018]

Means for Solving the Problems The object of the present invention for solving the above-mentioned problems is to provide a conductive member having a hole for allowing the surface of a keytop to be seen to the outside and having an outer surface subjected to an opaque treatment. A housing made of a light-sensitive resin, a circuit board provided inside the housing, a switch sheet and a light emitting element arranged on the circuit board, and a protrusion and a keytop holding portion capable of pressing the switch sheet. And a key top made of a light guiding resin that is fitted to the key top holding portion of the rubber holder and has an outer surface that is light-proof treated. Light emitted from the light-emitting element passes through the rubber holder and illuminates and spreads inside the light guide resin of the housing and between the light guide resin of the keytop and the rubber holder, and at least the area of the keytop not covered. Translucent surface It is configured communication terminal device as capable of recognizing the transmitted light emitted from the light transmitting unit for formed displayed outside.

The light emitting element is an LED mounted and mounted on the circuit board. The switch sheet is a membrane-type switch element, the periphery of which is formed on a light-reflecting surface layer, and the rubber holder is in close contact with this surface layer.

[0020]

According to the above-mentioned gist of the present invention, the light emitted from the light emitting element is transmitted through the inside of the light guiding housing while spreading inside the light guiding rubber holder, and is transmitted from the inside of the rubber holder to the key top. . Various symbols, codes, etc. formed by the light-transmitting portion formed on the surface of this key top can be recognized and identified, and since the housing is used as a light guide member, the conventional light guide plate is not interposed. It is possible to greatly reduce the thickness.

Since the light emitting element is an LED, it has a long life, consumes less power, and has a low mounting height, which further promotes thinning. By adopting a membrane type switch for the switch sheet, the switch sheet is made thinner and the switch stroke is reduced. Since the periphery is formed of a light-reflecting surface layer, the light from the light emitting element is effectively reflected, the irradiation efficiency of the key top is large, and the effect is impaired even if the thickness is reduced.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A communication terminal device of the present invention will be specifically described in detail with reference to the drawings in the following embodiments based on the gist of the above configuration.

FIG. 1 and FIG. 2 show a handset portion for communication of an automobile telephone apparatus, which is a communication terminal apparatus of the present invention, in an isolated perspective view of only a main portion and a side sectional view in an assembled state. In the figure, a membrane-type switch sheet 52 is adhesively fixed to a central portion of a circuit board 51 on which various electronic components are mounted and mounted, and is electrically connected to the circuit board 51. A backlight 54 for illumination and a liquid crystal display device 55 thereon are mounted on the left side of the drawing, and are connected to the circuit board 51, respectively.

On the right side of the drawing, a speaker 57 for calling is fitted in the hole of the circuit board 51 and attached. First
In the inside of the housing 61 of FIG.
Microphones 63 for transmission are attached to the right side and the right side via cushioning rubber 64, respectively. The speaker 62 and the microphone 63 are wire-connected to the flexible printed board 66 of the volume control switch 65 in the middle, and are attached so as to be collectively connected to the circuit board 51.

The liquid crystal display device 5 is provided in the upper second casing 67.
A window hole 68 is provided so that 5 can be seen, and a transparent window plate 69 is attached to the window hole 68 from the inside. A hole 7 for a key top is provided in the middle portion so as to correspond to the switch element 52.
1 is opened, and a transmission hole 72 for calling sound from the calling speaker 57 is provided on the right side.

A rubber holder 7 in which a square keytop holding projection 73 is integrally formed on the sheet-like upper side corresponding to the switch element 52 inside the hole 71 for the keytop.
5 are arranged. The rubber holder 75 is made of light guiding silicone rubber, and the key tops 76 are fitted in the key top holding protrusions 73. This key top 76
Is fitted into the square hole 71 of the second housing 51 to expose the upper surface.

With the above configuration, the circuit board 51 has the second housing 6
The circuit board 51 is fitted into the lower surface of the second housing 67, and the periphery of the circuit board 51 is engaged with a large number of elastic claws (not shown) of the second housing 67 so that the circuit board 51 is not easily removed.

Reference numeral 77 is a slide knob (not shown) for a slide switch, which is also attached to the second casing 67. While attaching a curl cord 78 for connecting to a control device (not shown) or a transmission / reception device,
Connect the flexible printed board 66 to the circuit board 51,
The first housing 61 and the second housing 67 are fitted around each other, and the first housing 61 and the circuit board 51 are attached and fixed by a set screw 80 penetrating the circuit board 51. The set screw 80 is covered with a rubber plug 81 embedded in the first housing 61 and is protected from being decomposed.

This will be described with reference to an enlarged detailed side sectional view showing only the switch portion of FIG. The switch sheet 52 mounted on the circuit board 51 is provided with a membrane type switch 83 in the XY directions. The rubber holder 75 contacting the top of the switch sheet 83 has a protrusion 85 for pressing the switch on the lower side of the upper key top protrusion 73.
Is formed, and the protrusion 85 for pressing the switch is in contact with the switch 83.

A large number of LEDs 87 are mounted on the circuit board 51 between the switches 83, and are configured to illuminate the rubber holder 75 and the second housing 67 thereon.
The second casing 67 is made of a synthetic resin having a light guiding property, and is surface-treated 89 so that only the front surface side is opaque. For example, it is carried out by an appropriate method such as two-color molding, transfer molding, coating method and the like.

The key top 76 fitted to the protrusion 73 of the rubber holder 75 is also formed of the same light guiding synthetic resin as that of the second casing 67, and the outer surface side thereof is the same as that of the second casing 67. An opaque surface treatment 91 is applied. As shown in the key top 76 arranged in the plan view of FIG. 4, various symbols, reference numeral 93 and the like are formed in a transparent state. This symbol, the reference numeral 93, etc. are not shown but omitted in the drawing.

As is often shown in the plan view of the circuit board 51 in FIG. 5, the switch sheet 52 is a printed board, and the switch 83 is embedded in the XY direction at a key portion of the printed board. A large number of LEDs 87 are mounted on. The surface of the switch sheet 52 is processed and formed, for example, in white so as to reflect light.

Referring again to FIG. 3, FIG. 3 shows the cross section of the portion indicated by the arrow AA in FIG. 5 including the second housing 67, the rubber holder 75, and the key top 76. Therefore, the LED 87 is located at a grid-shaped intersection defined by the square holes 71 of the second housing 67, and the key top 76 is located directly above the switch 83.

In FIG. 3, since the switch 83 is a membrane type switch, its stroke is very short, and the pressing of the key top 76 elastically bends and deforms the periphery of the thin film portion 95 of the rubber holder 75, and the switch pressing The projection 85 for compression is deformed by compression to press the switch 83. This improves the operational feeling of the switch.

The light emitted from the LED 87 passes through the sheet-like portion of the rubber holder 75 directly above and spreads. The light is transmitted from the lattice-shaped intersections of the second casing 67 through the inside of the second casing 67, reflected and diffused by the white surface of the inner surface of the opaque surface treatment 89, and the light thereof is switched sheet 5.
2 is reflected and diffused by the white layer on the upper surface of 2. By repeating reflection and diffusion in this way, the same applies to the inner surface layer of the surface layer 91 of the key top 76.

In this manner, the light space in which the light is confined is formed on the upper surface of the switch sheet 52 including the rubber holder 75 and the key tops 76. The rubber holder 75 made of silicone rubber having a light guiding property is not completely transparent but has a slightly translucent white color. Therefore, the light leaks through the transparent portion such as the symbol and the reference numeral 93 of the key top 76, but the color of this rubber holder 75 is seen, and a clear identification state can be obtained.

Further, the display of symbols, signs and the like is not limited to being displayed on the surface of the key top, but may be formed on the light guide portion of the second housing and within the range of light irradiation. Yes, it is possible to display various operations.

[0038]

As described above in detail, according to the communication terminal device of the present invention, the speaker for receiving and the microphone for transmitting are attached to the first casing, and the key top is provided on the key top holding protrusion. Since the circuit board is attached to the second housing while the rubber holder that has been fitted and held is attached to the second housing, the ease of assembly is eliminated and the conventional problems are eliminated, and the conventional problems are solved. Was done.

When the circuit board is attached to the second housing, the main surface of the back surface of the circuit board, on which the electronic components are mounted, can be directly seen when the first housing is removed, which facilitates maintenance and inspection. .

Since the window plate attached to the window hole of the second housing is attached from the inside, the window hole can be maximized, and the display is enlarged to make it easier to see. By using a membrane type switch with a short operation stroke of the switch, and by providing the second casing with light guiding properties, the conventional light guiding plate is not required, and the surface of the switch sheet is used as a light reflecting surface layer for light transmission. By increasing the binding effect,
Therefore, the thickness can be reduced and the cost can be reduced.

According to the present invention, the display of symbols, codes and the like is not limited to the surface of the key top, but can be formed in the light guide portion of the second housing and in the range where light is irradiated. It is a thing.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a communication terminal device of the present invention.

FIG. 2 is a side sectional view of the communication terminal device of the present invention.

FIG. 3 is a side sectional view of a main part of a switch part of the present invention.

FIG. 4 is a plan view of a key top arrangement.

FIG. 5 is a plan view of a circuit board.

FIG. 6 is an exploded perspective view of a conventional communication terminal device.

FIG. 7 is a side sectional view of a main part of a conventional switch section.

[Explanation of symbols]

 51 Circuit Board 52 Switch Sheet 54 Backlight 55 Liquid Crystal Display 57 Speaker 61 First Housing 62 Speaker 63 Microphone 65 Volume Adjusting Switch 66 Flexible Print Board 67 Second Housing 69 Window Board 75 Rubber Holder 76 Keytop 78 Curl code 83 Switch 85 Switch pressing protrusion 87 LED 89, 91 Surface treatment 93 Symbols, signs, etc. 95 Thin film

Front page continuation (72) Inventor Koichi Abe 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited

Claims (3)

[Claims] 1. A housing (67) having a hole (71) for allowing the surface of a keytop (76) to be seen through to the outside and made of a light-guiding resin whose outer surface is opaque. Circuit board (51) provided inside the casing (67)
And a switch sheet (5) arranged on the circuit board (51).
2) and the light emitting element (87), and the protrusion (8) that can press the switch sheet (52).
5) and the key top holding portion (73) and made of a light guiding rubber, and a rubber holder (75) fitted to the key top holding portion (73) of the rubber holder (75) so that the outer surface is not covered. A key top (76) made of light-transmitting light-guiding resin, and light emitted from the light emitting element (87) is transferred to the rubber holder (7).
5) and penetrates through the inside of the light guide resin of the housing (67) and between the inside of the light guide resin of the key top (76) and the rubber holder (75) to spread at least the key top. A communication terminal device, characterized in that it can recognize transmitted light emitted to the outside from a light-transmitting part (93) for display formed on the non-translucent surface of (76). 2. The light emitting device (87) is an LED mounted and mounted on the circuit board.
The communication terminal device according to. 3. The switch sheet (52) is a membrane type switch, the periphery of which is formed on a light-reflecting surface layer, and the rubber holder (75) is in close contact with this surface layer. The communication terminal device according to claim 1 or 2.