JP2001067972A - Input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent shining of a surface when the light from a light source passes through key rubber and an upper cover by arranging a light transmissive sheet provided with one or more keys, the light source arranged under this sheet and an opaque shield member extending up to a key arranging area of the sheet. SOLUTION: A shield 710 for forming resin on copper foil is arranged on key rubber 400 of silicone rubber arranged on a base board 300 in the almost center of a lower cover 100. An upper cover 600 having a key hole part 610 connected to the lower cover 100 is arranged above this shield 710. A membrane switch group 310 and an LED element group 320 composed of respective plural membrane switches 301 and LED elements 321 are arranged at equal intervals in the longitudinal/lateral direction on a surface of the base board 300. Various kinds of semiconductor elements are arranged on the reverse of the base board 300, and a hole part 330 is electrically connected to a grand line of the base board 300 to thereby prevent shining of a surface of the upper cover 600 by the light from the LED elements 321.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input device.

[0002]

2. Description of the Related Art In recent years, portable telephone devices have been rapidly spread, and are equipped with various functions such as a character transmitting function and a function of generating a ring tone by a user, in addition to a telephone function which is a basic function of the conventional telephone device. There are many things that did.

FIG. 4 is an exploded perspective view of a conventional portable telephone device.

In FIG. 4, a liquid crystal display for displaying characters and telephone numbers, a tuner for transmitting and receiving radio waves, and the like are not directly related to the present invention, and are not shown and will not be described.

[0005] The telephone device shown in FIG. 4 includes a lower cover 100 and a substrate 300 arranged substantially above the center of the lower cover 100.
And a key rubber 400 formed of, for example, silicon rubber and having a plurality of keys protruding therefrom, provided on the substrate 300, and extending along a short side of the key rubber 400 without extending to a region where the plurality of keys are arranged. A substantially rectangular noise shield 700 disposed on the key rubber 400, and a key hole portion 61 disposed on the noise shield 700 and described later.
And an upper cover 600 having 0.

The key rubber 400 has holes 7 at four corners.
01, the noise shield 700 has holes 701 at both ends, while the substrate 300 has holes 330 at four corners.

[0007] The noise shield 700, the key rubber 400 and the substrate 300 are formed by a first screw made of four screws.
Screw group 200 is inserted into hole 330 of substrate 300 and key rubber 4.
00 and the hole 701 of the noise shield 700 to be fixed to the lower cover 100.

On the other hand, the lower cover 100 is configured such that a second screw group 500 composed of four screws is
0, it is fixed to the upper cover 600.

On the surface of the substrate 300, a group of membrane switches 310 in which a plurality of membrane switches 301 are arranged at equal intervals in the vertical and horizontal directions, and two membrane switches 3 of the plurality of membrane switches 301
01 (Light Emitting Diodes) arranged at equal intervals in the vertical and horizontal directions so as to be surrounded by
(mode) An LED element group 320 composed of elements 321 is provided.

A high-frequency signal flows through a circuit pattern of the substrate 300 located below the noise shield 700, and noise generated from the high-frequency signal is cut off by the noise shield 700.

On the other hand, a memory element and a CPU (Central Processing) are provided on the back surface of the substrate 300.
And various semiconductor elements (not shown).

FIG. 5 shows the membrane switch 301 of FIG.
It is a notch disassembled perspective view of the periphery.

In FIG. 5, a first pattern 311 composed of, for example, a ground line and a second pattern 312 electrically connected to, for example, a CPU (not shown) and having a constant value of current flowing on the substrate 300 are substantially perpendicular to each other. The first substrate is disposed on a substrate below a diaphragm 315 described later.
A first contact pattern 313 electrically connected to the pattern 311 and having a surface exposed by a conductive metal; and a second contact pattern 313 electrically connected to the second pattern 312 and having a surface exposed by a conductive metal. A contact pattern 314 is provided.

An LED element 321 is disposed near the first and second contact patterns 313 and 314 on the substrate 300.

The first and second contact patterns 313 and 31
For example, SUS (SteelUse Stain)
and a hollow dome-shaped diaphragm 315 having a hollow inside, and a single-sided tape 316 having an adhesive adhered to a surface in contact with the surface of the diaphragm 315 is provided on the diaphragm 315, and the single-sided tape is provided. A key rubber 4 made of, for example, silicone rubber is provided on the base 316.
00 is arranged.

An upper cover 600 made of, for example, resin is disposed above the key rubber 400.

The key 410 protrudes from a partial area on the upper surface of the key rubber 400, and is an area excluding the key 410 of the key rubber 400.
1. In the area corresponding to the upper part, a concave part 4 having a concave back surface is provided.
20 are arranged.

The key 410 corresponds to, for example, each key of a numeric keypad of a telephone device, and an LED element 321 is fitted into the recess 420.

In a region of the upper cover 600 located above the key 410, a key hole 610 for fitting the key 410 is opened.

FIG. 6 is a sectional view of a key part around the key 410 shown in FIG.

In FIG. 6, a substantially dome-shaped diaphragm 315 and a single-sided tape 316 are sequentially disposed on a substrate 300 having an LED element 321. A key rubber 400 is provided on the single-sided tape 316 so as not to contact the single-sided tape 316. Is arranged.

A key 410 is disposed in an area of the key rubber 400 located above the diaphragm 315, and an upper cover 600 made of, for example, resin is disposed above the key rubber 400 except for the key 410. I have.

Next, when the user presses the key 410,
The key press detection operation of the membrane switch 301 will be described below with reference to FIGS.

When the user presses the key 410, the diaphragm 315 is crushed by the key 410 in accordance with the pressing.

Subsequently, the crushed diaphragm 315
Contact the first contact pattern 313 and the second contact pattern 314 formed on the surface of the substrate 300,
And the second contact patterns 313 and 314 are electrically connected.

The first and second contact patterns 313, 3
14 are electrically connected, the second pattern 312
Is grounded, and the CPU connected to the second pattern 312 detects this, so that the key 410
Is detected.

[0027]

Due to the recent tendency to reduce the size and weight of portable telephone devices, thin key rubbers 400 and upper covers 600 having a thickness of 0.5 to 1.5 mm have been used.

For this reason, the light emitted from the LED element 321 passes through the key rubber 400 and the upper cover 600, and the surface of the upper cover 600 shines, which is not preferable in terms of aesthetic appearance.

[0029]

The input device of the present invention comprises:
A light-transmitting sheet provided with the above keys, a light source provided below the sheet, and an opaque shield member extending to a region of the sheet where the keys are provided are provided. And

[0030]

FIG. 1 is an exploded perspective view of an input device of a portable telephone device according to an embodiment to which the present invention is applied.

The display section, tuner section, and the like are not directly related to the present embodiment, and are therefore omitted.

The portable telephone device shown in FIG.
And a substrate 3 disposed substantially above the center of the lower cover 100.
00, a key rubber 400 formed of, for example, silicon rubber, disposed on the substrate 300, a shield 710 formed on the key rubber 400, for example, formed of a resin on a copper foil, and located above the shield 710. And an upper cover 600 connected to the lower cover 100 and having a key hole 610 described later.

Holes 330 are formed at four corners of the substrate 300.
Are arranged, and holes 701 are arranged at four corners of the key rubber 400 and the shield 710.

On the surface of the substrate 300, a group of membrane switches 310 in which a plurality of membrane switches 301 are arranged at equal intervals in the vertical and horizontal directions, and two of the plurality of membrane switches 301
And an LED electrode group 320 composed of a plurality of LED elements 321 arranged at equal intervals in the vertical and horizontal directions so as to be surrounded by.

On the other hand, on the back surface of the substrate 300, various semiconductor elements such as a storage element and a CPU are arranged (not shown).

The hole 330 of the substrate 300 is electrically connected to a ground line provided on the substrate 300.

The key rubber 400 provided with the shield 710 on the upper surface is connected to the lower cover 1 via the substrate 300.
When fixing the first screw group 200 to the hole 701 of the shield 710 and the key rubber 400 and the substrate 3
This is performed by penetrating through the hole 330 of No. 00.

At this time, the hole 701 of the shield 710 is formed.
And the hole 330 of the substrate 300 are electrically connected through the first screw group 200, and the shield 710 is
0 is electrically connected to the ground line.

FIG. 2 is a cutaway exploded perspective view around the key shown in FIG.

In FIG. 2, a first pattern 311 composed of, for example, a ground line and a second pattern 312 electrically connected to, for example, a CPU (not shown) and having a constant current flow are arranged on the surface of the substrate 300. A first contact pattern 313 electrically connected to the first pattern 311 and having a conductive metal exposed on the surface thereof, and a second contact pattern 313 on the lower substrate of the diaphragm 315 to be formed.
A second contact pattern 314 is provided, which is electrically connected to the substrate and has exposed metal having conductivity on the surface.

The LED element 321 is located near the first and second contact patterns 313 and 314 on the substrate 100.
Is arranged.

The first and second contact patterns 313 and 31
A substantially dome-shaped diaphragm 315 having a hollow inside is disposed on 4.

On the diaphragm 315, a one-sided tape 316 having an adhesive adhered to a surface in contact with the surface of the diaphragm 315 is provided, and on the one-sided tape 316, a key rubber 400 made of, for example, silicon rubber is provided.

A key 410 protrudes from a portion of the upper surface of the key rubber 400 located above the diaphragm 315, and a concave portion recessed from the rear surface of the key rubber 400 is provided on a back surface of the key rubber 400 located above the LED element 321. 420 are provided.

A shield 710 formed by, for example, forming a resin 730 on a copper foil 720 is disposed on the surface of the key rubber 400 except for the key 410.

A key 410 made of silicone rubber
A gap of about 0.2 mm is formed between the side surface of the key 410 and the side surface of the shield 710 located in the vicinity of the side surface of the key 410 so as not to be cut by the shield 710 formed of copper foil.

In this embodiment, the gap is 0.2 mm
However, it can be changed according to the size of the key rubber 400.

The key 410 corresponds to, for example, a numeric keypad, and the LED element 321 is fitted into the concave portion 420.

FIG. 3 is a sectional view of a key part around the key 410 shown in FIG.

In FIG. 3, a substantially dome-shaped diaphragm 315 is provided on an upper surface of a substrate 300 having an LED element 321.
And the single-sided tape 316 are arranged in this order,
A key 410, which is a part of the key rubber 400, is disposed above the key 6 so as not to contact the single-sided tape 316.

On the upper surface of the key rubber 400 except for the area of the key 410, there is provided a shield 710 formed by forming a resin 730 on, for example, a copper foil 720 with an adhesive, and the shield 710 around the key 410 is provided. An upper cover 600 made of, for example, a resin is provided above.

As described above, the membrane switch 301 of this embodiment is different from the key rubber 40 except for the key 410.
For example, since a shield 710 formed by forming a resin 730 on a copper foil 720 is provided on the upper surface of the
0 blocks light from the LED elements 321 arranged on the substrate 300.

Therefore, no light is projected on the surface of the upper cover 600 located above the LED element 321.

In this embodiment, the shield 710 is used for a telephone device. However, the present embodiment is not limited to the telephone device but can be applied to other electronic devices.

In this embodiment, a copper foil is used as the shield 710. However, the material is not limited to a copper foil as long as the material blocks light.

[0056]

The input device of the present invention prevents light from leaking from the housing to the outside.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an apparatus according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the vicinity of a key shown in FIG.

FIG. 3 is a cross-sectional view of a main part around a key shown in FIG. 2;

FIG. 4 is an exploded perspective view of a conventional telephone device.

FIG. 5 is an exploded perspective view of the key shown in FIG. 4 around the key;

FIG. 6 is a cross-sectional view of a main part around a key shown in FIG. 5;

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Lower cover 110 Hole section 200 First screw group 300 Substrate 301 Membrane switch 310 Membrane switch group 311 First pattern 312 Second pattern 313 First contact pattern 314 Second contact pattern 315 Diaphragm 316 Single-sided tape 320 LED element group 321 LED element 330 Hole 400 Key Rubber 410 Key 420 Depression 500 Second Screw Group 600 Upper Cover 610 Key Hole 700 Noise Shield 710 Shield 720 Copper Foil 730 Resin

 ────────────────────────────────────────────────── ─── Continued from the front page (72) Inventor Jiro Ozaki 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture F-term (reference) in Sanyo Electric Co., Ltd. 5G006 AA02 AB25 AC07 AZ01 BA01 BA02 BB03 BC04 CB05 CD03 CD05 DB03 FB04 FD02 JA02 JB03 JC02 JD03 LC02 LE02 LG07

Claims (10)

[Claims] 1. A light-transmitting sheet provided with one or more keys, a light source provided below the sheet, and an opaque shield member extending to a region of the sheet where the keys are provided. An input device comprising: 2. A light source provided on a substrate, a conductive diaphragm provided on a contact pattern portion of the substrate, an adhesive tape provided on the diaphragm, and an upper surface of the tape. A translucent key rubber having a convex portion formed of one or more keys and a flat portion provided with the convex portion, and a conductive shielding member provided on substantially the entire flat portion of the key rubber. An input device, comprising: 3. The input device according to claim 1, wherein the shield member is a copper foil. 4. The input device according to claim 1, wherein a resin is formed on both surfaces or one surface of the shield member. 5. A conductive diaphragm is provided on or above the contact pattern of a substrate provided with at least one contact pattern for detecting button press and an LED element, and one side of the diaphragm is provided on the diaphragm. An input device comprising: a tape; a key rubber having a key protruding from a surface on the single-sided tape; and a conductive shield member provided in substantially the entire key rubber area excluding the key. An input device, wherein a member is electrically grounded and does not transmit light from the LED element. 6. The input device according to claim 5, wherein the shield member is a copper foil. 7. The input device according to claim 5, wherein a resin is formed on both surfaces or one surface of the shield member. 8. The input device according to claim 5, wherein the shield member is electrically connected to a ground pattern of a circuit pattern formed on the substrate. 9. A conductive diaphragm is provided on or above the contact pattern of a substrate provided with a contact pattern for detecting button press and an LED element, and a single-sided tape is provided on the diaphragm. An input device comprising: a key rubber on which one or more keys protrude from the surface on the single-sided tape; and a conductive shield member provided on substantially the entire key rubber area excluding the keys. An input device, wherein the key and the shield member do not contact each other. 10. The input device according to claim 9, wherein a gap of 0.1 to 1.0 mm is provided between a side surface of the protruding key and a side surface of the shield member. Input device to do.