JP2908061B2 - Keyboard unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard unit of a dealing board used for a terminal of a financial institution.

[0002]

2. Description of the Related Art Conventionally, a dealing board used for a terminal of a financial institution performs a financial transaction using a telephone line, and thus has a telephone function and a keyboard for using the telephone function.

The above-mentioned keyboard is unitized,
This keyboard unit is provided with operation buttons as shown in FIGS.

That is, the operation button shown in FIG. 11 comprises a button a, a conductive contact rubber b provided below the button a, a printed circuit board c, and a panel d provided so as to cover the printed circuit board c. b is urged upward by the elasticity of the button a, and a locking portion e is protrudingly provided on the outer periphery of the lower part of the button a. Is not removed from the hole f of the panel d.

In the operation button constructed as described above, when the button a is pressed, the stroke S descends, and the contact portion g provided on the conductive contact rubber b contacts the contact h on the printed circuit board c. A gap X2 is set between the buttons so that the lower end of the button a does not contact the upper surface of the conductive contact rubber b even in this state.

If the thickness D of the panel d, the height C of the locking portion e, and the thickness B of the conductive contact rubber b are assumed to be the sum of the stroke S of the button a and the gap X2 from the upper surface of the printed circuit board c, The thickness dimension A reaches the upper surface of the panel d.

On the other hand, FIGS. 13 and 14 show a side cross section of the operation button and a side cross section when the button a is pressed, and an opening i is provided in a printed circuit board c beside each operation button. The display j provided on the lower side of the printed circuit board c from the opening i can be seen.

However, in the above-mentioned conventional keyboard unit, since the thickness dimension A from the upper surface of the printed circuit board c to the upper surface of the panel d is large, when the display j is viewed from an oblique direction, the line of sight Y is as shown in FIG. Thus, a non-viewable range Z is generated on the display j.

In order to prevent such a problem, operation buttons are employed as shown in FIGS.

The operation button shown in FIG. 15 has a dome-shaped button 1 formed on a polyester sheet k having a printed surface, and the operation button shown in FIG. 16 has a silicone rubber sheet m further above it. Another button n is formed on this silicone rubber sheet m.
Has an effect that the thickness dimension A from the upper surface of the printed circuit board c to the upper surface of the panel d can be greatly reduced as compared with the operation button shown in FIG.

[0011]

However, in the conventional operation buttons shown in FIGS. 15 and 16, the stroke S of the buttons 1 and n can be reduced to only about 1 mm due to the forming technique and the life of the polyester sheet.

As a result, there are drawbacks in that the operation feeling when the buttons 1 and n are pressed is poor, and the reliability is lacking, such as when the button is used on a frequently used dealing board, which is quickly consumed.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional drawbacks, and provides a keyboard unit having a small thickness dimension from the upper surface of a printed circuit board to the upper surface of a panel and having operation buttons having a good operation feeling. It is intended for.

[0014]

Means for Solving the Problems To this invention to achieve the above object, provided with a conductive contact rubber and panel on a printed circuit board, a plurality of holes opened in the panel, and the contact of the printed circuit board button contacting the contact portion of the upper Kishirube conductive contact rubber fitted vertically movable, the guide
Provided on the contact rubber and the button on the printed circuit board
The locking part is inserted into the part facing the locking part for retaining.
In the keyboard unit having an escape hole to be inserted , the conductive contact rubber is connected to the printed circuit board and the panel.
And make sure that the button is pressed
If not, touch the locking part against the panel.
And the locking portion is connected to the conductive contact rubber and the pre-contact.
It is formed so as to move up and down in the escape hole provided in the printed circuit board .

[0015]

With this arrangement, it is possible to reduce the thickness from the upper surface of the printed circuit board to the upper surface of the panel simply by reducing the thickness of the conductive contact rubber and the panel without changing the stroke of the button. Can be reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. FIG. 1 is a plan view of a keyboard unit used for an operation unit of a dealing board, and FIG.
3 is a side view of the same, FIG. 4 is an enlarged plan view of the vicinity of the operation button, FIG. 5 is a sectional view taken along line EE of FIG. 4, FIG.
7 is a cross-sectional view showing the operation state, FIG. 7 is a cross-sectional view along the line FF in FIG. 4, and FIG.

In these figures, 1 is a printed circuit board, 2
Denotes a conductive contact rubber, 3 denotes a button, and 4 denotes a panel.

The panel 4 is provided with a large number of rectangular holes 4a in the vertical and horizontal directions.
Are fitted.

Each of the buttons 3 is formed in a thin shape.
At the corner of the lower end, a locking portion 3a that engages with the lower surface of the panel 4 from below is projected, and on the lower surface of the button 3,
A projection 3b is provided to be in contact with the upper surface of the contact portion 2a of the conductive contact rubber 2.

The conductive contact rubber 2 comprises a printed circuit board 1 and
PCB so as to be in close contact with the finely panel 4 1 and the panel 4
And below the button 3, there are provided, for example, two contact portions 2a bulging upward for each button 3, and the elasticity of the thin portion 2b of the contact portion 2a is provided. As a result, each button 3 is urged upward, and a contact 1a that is conducted by the contact portion 2a is formed on the printed circuit board 1 below each contact portion 2a.

In a portion where the locking portion 3a protruding from the corner of the button 3 abuts, an escape hole 2 is formed in the conductive contact rubber 2.
c, and an escape hole 1b is formed in the printed circuit board 1. The locking portion 3a of the button 3 is loosely fitted into the escape holes 2c, 1b from above.

Then, even when the button 3 is pressed and the contact portion 2a is lowered by the stroke S, the conductive contact rubber 2 is provided so that the tip of the locking portion 3a does not protrude below the lower surface of the printed circuit board 1.
Is set.

Next, the operation will be described. When the button 3 is not pressed, the button 3 is raised to the position shown in FIG. 5 by the elasticity of the thin portion 2b of the conductive contact rubber 2, and the locking portion 3a is located on the lower surface of the panel 4. It is locked so as not to get out of the hole 4a.

Next, when the button 3 is pressed, the contact portion 2a makes a stroke S to come into contact with the contacts 1a on the printed circuit board 1 to establish conduction between the contacts 1a.
Of the conductive contact rubber 2 and the escape holes 2c and 1b of the printed circuit board 1 do not interfere with the conductive contact rubber 2 and the printed circuit board 1.

The thickness A 'from the upper surface of the printed circuit board 1 to the upper surface of the panel 4 is determined by the thickness B of the conductive contact rubber 2 and the thickness D of the panel 4, and is not related to the stroke S. Even if the conductive contact rubber 2
By reducing the thickness B and D of the panel 4 and the thickness A ′, the thickness A ′ can be reduced. Therefore, the display 5 can be viewed obliquely from the opening 1 c formed in the printed circuit board 1 as shown in FIG. The invisible range on the display 5 with respect to the line of sight Y is Z ', which can be significantly reduced as compared with the conventional keyboard unit.

FIGS. 9 and 10 show the locking portion 3 of the button 3.
a is projected downward from the lower surface of the printed circuit board 1 to lock the button 3 from the hole 4a of the panel 4 by locking the locking portion 3a to the lower surface of the printed circuit board 1. As shown, if there is a space below the printed circuit board 1, the stroke S of the button B can be set arbitrarily by adopting this structure.

[0027]

As described in detail above, according to the present invention, since the escape hole is provided at a portion opposite to the locking portion provided as a stopper for preventing the button from coming out of the hole of the panel, the button can be pushed. If the locking part is inserted into the escape hole, it will not interfere with the conductive contact rubber or printed circuit board,
Only by reducing the thickness of the conductive contact rubber and the panel, the thickness dimension from the upper surface of the printed circuit board to the upper surface of the panel can be reduced without reducing the stroke of the button.

As a result, when the display is viewed from an oblique direction, the non-viewable range on the display can be greatly reduced as compared with the conventional keyboard unit, so that the display becomes very easy to see.

Since the stroke when the button is pressed is the same as that using the conventional conductive contact rubber,
The operation feeling is not impaired at all, and the durability is remarkably improved as compared with the one using the polyester sheet, so that the reliability is high.

[Brief description of the drawings]

FIG. 1 is a plan view of a keyboard unit according to an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is an enlarged sectional view near an operation button.

FIG. 5 is a sectional view taken along line EE in FIG. 4;

FIG. 6 is a sectional view showing the operation state.

FIG. 7 is a sectional view taken along line FF of FIG. 4;

FIG. 8 is a sectional view showing the operation state.

FIG. 9 is a sectional view showing another embodiment.

FIG. 10 is a sectional view of the same operation state.

FIG. 11 is a cross-sectional view of operation buttons provided on a conventional keyboard unit.

FIG. 12 is a sectional view of the same operation state.

FIG. 13 is a sectional view taken along line GG of FIG. 11;

FIG. 14 is a sectional view of the same operation state.

FIG. 15 is a cross-sectional view of another operation button provided on a conventional keyboard unit.

FIG. 16 is a sectional view of another operation button provided on a conventional keyboard unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 1a Contact 1b Escape hole 2 Conductive contact rubber 2a Contact part 2c Escape hole 3 Button 3a Locking part 4 Panel 4a hole S Stroke A 'Thickness

Claims (1)

(57) [Claims] With 1. A provision of the conductive contact rubber and panel on a printed circuit board, a plurality of holes opened in the panel, a button contacting the contact portion of the contact and the conductive contact rubber the printed circuit board move up and down freely fitted, the guide
Provided on the contact rubber and the button on the printed circuit board
The locking part is inserted into the part facing the locking part for retaining.
In the keyboard unit having an escape hole to be inserted , the conductive contact rubber is attached to the printed circuit board and the panel.
When the button is not pressed, the locking part
Abuts on the panel, and the locking portion contacts the conductive contact rubber and the printed circuit board.
A keyboard unit formed so as to move up and down in the provided escape hole .