JP2002260479A - Illuminated switch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminated switch device, which is small, and has little illumination dispersion and strong illuminance. SOLUTION: In the illuminated switch device, a through-hole 2a is formed on a print board 1 in the position opposed to a hole 6a formed on the top of a movable contact 6, and a light source 9 is exposed from the through-hole 2a so as to emit light toward the hole 6a of the movable contact 6. Since the light source 9 emits light from right under a retaining sheet 7 or an operation member 10, little illumination dispersion occurs and strong illuminance is obtained, so that the illuminated switch device with an excellent visibility is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminated switch device suitable for use in a keyboard switch or the like used in electronic equipment such as a portable telephone.

[0002]

2. Description of the Related Art FIG.
The printed circuit board 51 includes an insulating substrate 52 and a first substrate provided on one surface side of the insulating substrate 52.
, A ring-shaped second fixed contact 54 provided on one surface side of the insulating substrate 52 and arranged to surround the first fixed contact 53, and a second fixed contact 54. The land portion 5 which is a part of a conductive pattern (wiring pattern) provided on one surface side of the insulating substrate 52 at a remote position
5 is comprised.

A movable contact 56 made of a metal plate is dome-shaped and can be deformed. The movable contact 56 has its outer peripheral edge 56a mounted on the second fixed contact 54 and has a central position. The lower portion of the top portion 56b located in the portion is in a state facing the first fixed contact 53. As described above, the push switch S2 is formed by the first and second fixed contacts 53 and 54 and the movable contact 56.

When the movable contact 56 is pressed, the movable contact 56 deforms and reverses, and the top portion 56b comes into contact with the first fixed contact 53, and the first and second fixed contacts 53,
When the gap between the contacts 54 is turned on and the pressing of the movable contact 56 is released, the movable contact 56 returns to its original state by itself, and the gap between the first and second fixed contacts 53 and 54 is turned off.

A light guide member 57 made of a synthetic resin molded product
A plate-like base 57a, a plate-like movable portion 57b formed by being lifted upward from the base 57a, and a land 5
5, a hole 57c provided in the base 57a.
And The light guide member 57 includes a base 57a.
Is attached to one surface side of the printed circuit board 51 with an adhesive or the like, and the movable portion 57b is located on the top portion 56b of the movable contact 56.

The light emitting element 58 is provided with a hole 57 c of the light guide member 57.
And is mounted in a state of being electrically connected to the land portion 55. The light of the light emitting element 58
a, the movable portion 57 located above the movable contact 56
b.

A light-transmitting sheet 59 made of a synthetic resin or the like is attached with an adhesive or the like so as to cover the light guide member 57 and the light-emitting element 58, and the surface of the sheet 59 is attached to the light guide member. The light is illuminated by the light emitting element 58 via the light emitting element 57.

In the illuminated switch device having the above-described configuration, the light of the light emitting element 58 is transmitted to the base 57 a of the light guide member 57.
The sheet 59 is illuminated by this light and is guided to the movable portion 57b, and when the upper portion of the sheet 59 is pressed, the movable portion 57b is pushed and bent downward. Then, the top 56b of the movable contact 56 is pushed, and the movable contact 56 is inverted, and the movable contact 56 is moved to the first fixed contact 5
3 and the space between the first and second fixed contacts 53 and 54 is O
N.

Further, when the pressing of the sheet 59 is released, the movable contact 56 returns to its original state by itself, and the space between the first and second fixed contacts 53 and 54 is turned off.
b also self-returns, returning the sheet 59 to its original state, and thus the operation of the illuminated switch device is performed.

[0010]

Since the conventional switch device with illumination uses the light guide member 57, uneven illumination occurs and uniform illumination cannot be performed. Further, the light guide member 57 is required and the cost is reduced. There is a problem of getting high. Also,
Since the light emitting element 58 is mounted at a position far away from the switch S2, there is a problem that the switch device becomes large and the illuminance for illuminating the sheet 59 becomes weak.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a small-sized illuminated switch device having less illumination unevenness, high illuminance, and small illumination.

[0012]

As a first means for solving the above-mentioned problems, a first fixed contact and a second fixed contact surrounding the first fixed contact are provided. A printed circuit board provided on one surface side; and a dome-shaped movable contact made of metal which is placed on the second fixed contact and is deformable so as to be able to contact and separate from the first fixed contact. A light source for the movable contact, a hole is provided on the top of the movable contact, and a through hole is provided on the printed circuit board at a position facing the hole, and the first hole is provided on an outer peripheral portion of the through hole. The configuration is such that the fixed contact is located and the light source is exposed from the through hole so that the light source illuminates toward the hole of the movable contact.

As a second solution, a light emitting portion of the light source is arranged in the through hole. As a third solution, a land portion made of a conductive material is provided on the other surface of the printed circuit board opposite to the one surface on which the first and second fixed contacts are provided, and Is composed of a light emitting diode, and the light emitting diode is mounted in a state of being electrically connected to the land.

As a fourth solution, the printed circuit board is formed of a rigid material. Further, as a fifth solution, the inner wall surface of the through hole is plated.

As a sixth solution, an operating member is arranged above the movable contact, and the operating member is illuminated by the light source through the hole of the movable contact. As a seventh solution,
A recess is provided in the center of the lower part of the operating member, and the outer shape of the recess is formed larger than the light emitting section.

As an eighth solution, the upper part of the movable contact is covered with a translucent holding sheet. Further, as a ninth solution means, the holding sheet is illuminated by the light source through the hole of the movable contact, and a display section is provided at a portion of the holding sheet facing the hole.

[0017]

FIG. 1 is a sectional view of a main part of an illuminated switch device according to the present invention. FIG. 1 is a sectional view showing the structure of the illuminated switch device according to the present invention. 1 is a flat insulating substrate made of a rigid (hard) material such as epoxy resin containing glass.
A circular through-hole 2 a provided in the insulating substrate 2;
A first fixed contact 3 provided on one surface of the insulating substrate 2 so as to surround the outer peripheral portion of the through hole 2a, and a first fixed contact 3 provided on one surface of the insulating substrate 2 and surrounding the first fixed contact 3. And a conductive pattern (wiring pattern) 5 made of a conductive material such as copper foil provided on one side and the other side of the insulating substrate 2. Have been.

The conductive pattern 5 is formed on the other surface of the insulating substrate 2 at the outer periphery of the through hole 2a.
And a pair of lands 5b provided on the other surface of the insulating substrate 2 at a position slightly separated from the pattern 5a and opposed to the through hole 2a, the first fixed contact 3 and the pattern 5a.
And a connection conductor 5c provided on the inner wall surface of the through-hole 2a in a state where the connection conductor 5c is conducted.

The connection conductor 5c is formed by plating made of a metal such as copper. Further, although not shown here, a pattern drawn from the second fixed contact 4 on one surface side of the insulating substrate 2 is provided. Conductive pattern 5 composed of wiring
Is provided on the other surface of the insulating substrate 2.
a, a conductive pattern 5 including a pattern drawn from the land portion 5b is provided.

The movable contact 6 made of a metal plate is dome-shaped and deformable, is provided at the center of the top, and has a circular hole 6a having a larger diameter than the through hole 2a of the insulating substrate 2. 6, an outer peripheral portion 6b is placed on the second fixed contact 4, and a hole 6a located at the center portion is a through hole 2a.
And a contact portion 6c located around the hole 6a.
Is in a state of facing the first fixed contact 3. As described above, the push switch S1 is formed by the first and second fixed contacts 3 and 4 and the movable contact 6, and although not shown here, a plurality of switches S1 are provided on the printed circuit board 1. Is formed.

When the movable contact 6 is pressed, the movable contact 6 deforms and reverses, and the contact portion 6c located around the hole 6a comes into contact with the first fixed contact 3, and Second
When the contact between the fixed contacts 3 and 4 is turned on and the pressing of the movable contact 6 is released, the movable contact 6 self-returns to the original state, and the space between the first and second fixed contacts 3 and 4 turns off. Become.

A holding sheet 7 made of a light-transmitting synthetic resin
Has an adhesive 8 provided on the lower surface thereof, and the holding sheet 8 is provided between the upper surface of the movable contact 6 and the printed circuit board 1.
Is arranged so as to cover the upper surface of the
Are attached, the holding sheet 7 is attached, and the upper surface of the movable contact 6 is attached with an adhesive 8 so that the movable contact 6 is held by the holding sheet 7. And the movable contact 6
The sheet is pressed via the holding sheet 7 to perform a reversing operation.

The light source 9 including a light emitting diode (LED) has a light emitting portion 9a and a support plate 9b for supporting the light emitting portion 9a. (Not shown) is supported.
The light source 9 inserts the light emitting portion 9a into the through hole 2a from the other side, which is the lower surface of the printed circuit board 1, and
The support plate 9b is brought into contact with the other surface of the printed circuit board 1, and the light source 9
Are connected to the conductive pattern 5 by soldering to the land portions 5b, and the light source 9 is attached to the printed circuit board 1.

That is, the light emitting portion 9a of the light source 9 is
The light source 9 is illuminated from directly below the hole 6a toward the hole 6a, and the light-transmitting member 9 is disposed at a position facing the hole 6a of the movable contact 6 in a state of being exposed from the light source. Through the holding sheet 7, light is led out.

The operating member 10 made of a molded article of a light-transmitting synthetic resin has a concave portion 10b provided in the lower central portion while leaving a pressing portion 10a on the lower outer peripheral portion.
The outer shape of b is larger than the outer shape of the light emitting portion 9a of the light source 9 and the outer shape of the through hole 2a of the insulating substrate 2. The operating member 10 has a recess 10b having a movable contact 6a.
, And positioned on the holding sheet 7,
It is held up and down by a support member (not shown).

The operating member 10 is provided for each switch S 1, and the upper surface of the operating member 10 receives light from the light source 9 passing through the holding sheet 7.
It is in an illuminated state. The operation member 10
On the upper surface of the is provided a display unit consisting of figures, characters, etc.,
This display unit is illuminated to make it easy to determine.

As described above, when the display unit presses one operating member 10 illuminated by the light source 9, the illuminated switch device of the present invention having the above-described structure is provided on the outer periphery of the hole 6a by the pressing unit 10a. The holding sheet 7 located is pressed. Then, the upper part of the movable contact 6 is pushed, the movable contact 6 is reversed, and the contact portion 6c is moved to the first fixed contact 3.
, And the space between the first and second fixed contacts 3 and 4 is turned on.

At this time, the movable contact 6 is formed by the hole 6a.
By avoiding collision between the light source 9 and the through hole 2a, the contact portion 6c located around the hole 6a comes into contact with the first fixed contact 3 located at the outer peripheral portion of the through hole 2a. When the operation member 10 is strongly pressed, the operation member 10
However, since the concave portion 10 b is provided at a position facing the light source 9, the pressing of the light source 9 by the operation member 10 is avoided, and the light source 9 is not broken.

When the pressing of the operating member 10 is released,
The movable contact 6 self-returns to its original state, the space between the first and second fixed contacts 3 and 4 is turned off, and the operating member 10 is also pushed back to the original position.
The operation of the illuminated switch device is performed.

Although the above embodiment has been described using the operating member 10, this operating member 10 is omitted.
The switch S1 may be operated by pressing the upper portion of the holding sheet 7, and in this case, a display portion made of a figure, a character, or the like is provided on a portion of the holding sheet 7 facing the hole 6a of the movable contact 6. The display unit may be provided so as to be illuminated to facilitate the determination.

In the above embodiment, the holding sheet 7
May be deleted, and the movable contact 6 may be directly operated by the operation member 10. Further, a flexible substrate such as a polyimide film may be used as an insulating substrate constituting the printed circuit board 1, and the lower surface thereof may be supported by a reinforcing plate.

[0032]

According to the switch device with illumination of the present invention, a through hole 2a is provided in the printed circuit board 1 at a position facing the hole 6a provided at the top of the movable contact 6, and the light source 9 is connected to the through hole 2a.
And the light source 9 is illuminated toward the hole 6a of the movable contact 6 so that the holding sheet 7 and the operating member 1 are exposed.
Since the light is illuminated by the light source 9 from immediately below 0, the illumination unevenness is extremely small, and the illuminance is strong. Further, the present invention eliminates the need for a conventional light guide member, is inexpensive, and has a switch S.
Since the light source 9 is disposed below the light source 1, a compact and small illuminated switch device can be provided.

The light emitting portion 9a of the light source 9 is provided in the through hole 2a.
Is arranged, a compact light-emitting portion 9a without damage is obtained.

A land portion 5b made of a conductive material is provided on the other surface of the printed circuit board 1 opposite to the one surface on which the first and second fixed contacts 3 and 4 are provided. The light emitting diode is composed of a land 5b.
Since the light source 9 is mounted in a state of being electrically connected to the light source 9, the light source 9 can be easily mounted, and it is possible to provide an illuminated switch device which is small and has good productivity.

Further, since the printed circuit board 1 is formed of a rigid material, the light emitting portion 9a is protected by the printed circuit board 1 and a light-emitting portion 9a without damage is obtained.

Further, since plating is applied to the inner wall surface of the through hole 2a, the chipping of the printed circuit board 1 when the through hole 2a is formed is not particularly adhered to the first fixed contact 3, and a stable switch is formed. Can be switched.

An operating member 10 is provided above the movable contact 6.
The operation member 10 is illuminated by the light source 9 through the hole 6a of the movable contact 6, so that the light is illuminated by the light source 9 from directly below the operation member 10. Therefore, the illumination unevenness is extremely small and the illuminance is strong. Therefore, an easily illuminated switch device with illumination can be provided.

A concave portion 10b is provided in the lower central portion of the operation member 10, and the outer shape of the concave portion 10b is
Since the light source 9 is formed to be larger than a, pressing of the light source 9 by the operation member 10 can be avoided and the light source 9 can be provided without being destroyed.

Further, since the upper part of the movable contact 6 is covered with the holding sheet 7 having a light transmitting property, it is possible to make it difficult for foreign matter to enter the movable contact 6 from the outside, and also to light source 9 such as a light emitting diode due to static electricity of the operator. Can be prevented from being electrostatically damaged, and a highly reliable switch device with illumination can be provided.

The holding sheet 7 is provided with the holes 6a of the movable contact 6.
Since the display section is provided in the portion of the holding sheet 7 which is illuminated by the light source 9 and faces the hole 6a, the display section is easy to see and distinguish, so that a switch device with illumination having good operability can be provided. Can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an illuminated switch device of the present invention.

FIG. 2 is a sectional view of a main part of a conventional switch device with illumination.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 2 Insulated board 2a Through hole 3 1st fixed contact 4 2nd fixed contact 5 Conductive pattern 5a Pattern 5b Land part 5c Connection conductor 6 Movable contact 6a Hole 6b Outer edge 6c Contact part S1 switch 7 Holding sheet 8 Adhesive 9 Light source 9a Light emitting portion 9b Support plate 10 Operating member 10a Pressing portion 10b Recess

Claims (9)

[Claims] 1. A printed circuit board having a first fixed contact and a second fixed contact disposed so as to surround the first fixed contact on one side, and mounted on the second fixed contact. Placed,
A metal dome-shaped movable contact deformable so as to be able to contact and separate from the first fixed contact, and a light source for illuminating, and a hole is provided at the top of the movable contact,
The printed circuit board is provided with a through hole at a position facing the hole, the first fixed contact is located at an outer peripheral portion of the through hole, and the light source is exposed from the through hole. Illuminated toward the hole of the movable contact. 2. The illuminated switch device according to claim 1, wherein a light emitting portion of the light source is disposed in the through hole. 3. A land portion made of a conductive material is provided on the other surface of the printed circuit board opposite to the one surface provided with the first and second fixed contacts, and the light source is a light emitting diode. 3. The illuminated switch device according to claim 2, wherein the light-emitting diode is mounted so as to be electrically connected to the land. 4. The illuminated switch device according to claim 1, wherein the printed circuit board is formed of a rigid material. 5. The illuminated switch device according to claim 1, wherein an inner wall surface of the through hole is plated. 6. An operating member is disposed above the movable contact, and the operating member is illuminated by the light source through the hole of the movable contact. An illuminated switch device according to any one of the claims. 7. The illuminated switch device according to claim 6, wherein a concave portion is provided in a central portion below the operation member, and an outer shape of the concave portion is formed larger than the light emitting portion. 8. The illuminated switch device according to claim 1, wherein an upper portion of the movable contact is covered with a translucent holding sheet. 9. The display device according to claim 8, wherein the holding sheet is illuminated by the light source through the hole of the movable contact, and a portion of the holding sheet facing the hole is provided with a display unit. Illuminated switch device.