JPH06243755A - Keyboard - Google Patents

Abstract

PURPOSE:To prevent water droplets from entering through holes by providing a waterproof rib which projects upwards over a base panel, in such a way that the rib is located within the area of projection of a control key which surrounds the through holes and which protrudes from the perpendicular direction. CONSTITUTION:A base-panel outer peripheral rib 23 which projects upwards over a base panel 13 is formed at the peripheral edge of the base panel 13. A key outer periphery rib 24, which serves as a waterproof rib and protrudes upwards, is located within the area of projection of a control key 10 which surrounds a support hole 16 and a locking hole 17 and which is projected from the perpendicular direction, and the rib 24 is formed in each key 10. If water droplets or the like splash on the control portion of the keyboard, they fall onto the base panel 13 from the peripheral edge of the key 10. Since the rib 24 is located inwards of the peripheral edge of the key 10, that is, inwards of the place where the water droplets fall, the water droplets are blocked by the rib 24 and so do not enter the holes 16,17; further, the water droplets are blocked by the rib 23, lead to a vaporizing pan 22 and are discharged to the outside through a tube 25 and so can be prevented from entering the equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard used in electric equipment such as electronic cash registers.

[0002]

2. Description of the Related Art In an electronic cash register used for handling water such as food, water drops or the like may enter the inside of the device from its keyboard, causing a failure of the electric system or the like. For this reason, it has been practiced to cover the keyboard with a flexible transparent drip-proof sheet such as silicone rubber to prevent water droplets from entering.

[0003]

However, the method of covering the keyboard with the drip-proof sheet as described above has a drawback that the elasticity of the drip-proof sheet causes a bad operation feeling at the time of key operation and deteriorates the operability. is there. Further, due to the deformation of the drip-proof sheet when the key is pressed, the adjacent key may be erroneously input.

[0004]

A flat plate-shaped base panel and an operation key having a leg portion projecting downward are provided, and the operation key is formed on the base panel. In a keyboard slidably inserted into a through hole and attached, a waterproof rib protruding upward on the base panel is located inside the projected area of the operation key that surrounds the through hole and is vertically projected. Provided.

[0005]

[Function] A water drop on the base panel is blocked by a waterproof rib provided on the base panel so as to be located inside the projected area of the operation key which is projected from the vertical direction while surrounding the through hole, and the water drop on the through hole is blocked. Are prevented from entering.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. The keyboard 1 of this embodiment is provided integrally with the electronic cash register 2.
As shown in FIGS. 2 and 3, this electronic cash register 2 has the keyboard 1 arranged on the front side upper surface of a main body housing 4 formed on a drawer 3, and a cashier side display 5 on the rear side of the keyboard 1. It is arranged, and the customer side display 6 is arranged on the back side thereof.

In the main body housing 4, a receipt journal printer 7, a power source 8 and a printed circuit board 9 are provided.
And the like, and the keyboard 1 is arranged. In addition, the keyboard 1 includes an operation section 11 formed by arranging operation keys 10 in a vertical and horizontal direction, in the main body housing 4
It is arranged so as to be exposed to the outside from an opening 12 formed on the front side upper surface.

This keyboard 1 is, as shown in FIG.
The printed board 9, the base panel 13 placed on the upper surface thereof, and the operation keys 1 arranged on the upper surface thereof.
It is formed from 0 and. As shown in FIGS. 1 and 6, the operation key 10 includes a slide shaft 14 which is a leg portion projectingly provided below the operation key 10 and a plate-like elastic leg 15, and the base panel 13.
Support hole 16 which is a through hole formed in
It is attached to the base panel 13 by inserting into the base panel 13 respectively. A stopper claw 15a is formed at the tip of the elastic leg 15, and the stopper claw 15a passes through the retaining hole 17 while deforming the elastic leg 15, and at the time of passing through the retaining hole 17. It engages with the back surface of the base panel 13 to prevent the operation key 10 from falling out of the base panel 13. Further, a spring 18 for urging the operation key 10 upward is provided between the operation key 10 and the base panel 13, and
It is installed through. The number of switches 19 corresponding to the operation keys 10 are provided on the printed circuit board 9. These switches 19 are arranged at positions that penetrate the support hole 16 and face the tip of the sliding shaft 14 that faces the printed circuit board 9, and are advanced by pressing the operation key 10. The sliding shaft 1
The on / off operation is performed by 4. In addition, the operation key 10
A sticker 20 for display is attached to the upper surface of the, and a transparent cover 21 that protects the sticker 20 is covered.

Here, the base panel 13 is arranged obliquely along the outer shape of the main body housing 4 with the front end portion on the front side being lowered, and on the surface of the front end portion of the base panel 13. An evaporating dish 22 having a concave cross section is formed from one side to the other side. Also, this base panel 13
A base panel outer peripheral rib 23 protruding upward is formed on a peripheral portion of the base panel outer peripheral rib 23, and a key outer peripheral rib 24 protruding upward, which is a waterproof rib, covers the support hole 16 and the retaining hole 17. It is formed for each operation key 10 so as to be surrounded and positioned inside the projected area of the operation key 10 projected from the vertical direction.

A drainage tube 25 is connected to one end of the evaporation tray 22, and the drainage tube 25 is connected to the main body housing 4 as shown in FIGS. 2 and 3 above.
And is guided to the outside of the apparatus via the drawer 3.

In such a structure, when water droplets or the like are applied to the operation portion 11 of the keyboard 1, the water droplets will be generated by the operation keys 1.
It falls on the base panel 13 from the peripheral part of 0. Since the key outer peripheral rib 24 is located inside the peripheral portion of the operation key 10, that is, inside the drop point of the water droplet, this water droplet is blocked by the key outer peripheral rib 24, and the support hole 16 and the retaining hole 17 are provided. Without entering, it is further blocked by the outer peripheral ribs 23 of the base panel and reaches the evaporation tray 22 without dropping from the top of the base panel 13 into the inside of the device. Then, it is evaporated by the heat of the electronic device or the like in the evaporation tray 22, or is discharged to the outside through the tube 25.

As described above, in the keyboard 1 of this embodiment, even if water droplets or the like are applied to the operating portion 11, the water droplets are evaporated or discharged to the outside without reaching the inside of the base panel 13. Therefore, this keyboard 1 can prevent water from entering the inside of the device without using a drip-proof sheet or the like,
It is possible to prevent a contact failure of the keyboard 1 itself and a device failure.

In the keyboard 1 of this embodiment, since the base panel 13 is inclined, the key outer peripheral rib 24 may be formed so as to surround only the support hole 16 and the retaining hole 17 above.

Further, the keyboard 1 can be formed as an independent device and used by connecting to various electric devices such as a personal computer.

[0015]

As described above, the present invention is provided with the flat base panel and the operation key having the leg portion protruding downward, and the operation key is provided on the base panel and the leg portion is provided on the base panel. In a keyboard slidably inserted into a formed through hole and attached, a waterproof rib projecting upward on the base panel surrounds the through hole and is inside the projected area of the operation key projected vertically. Since it is located at the position, water droplets can be prevented from entering the inside of the device through the through hole, so that the device can be prevented from malfunctioning and the operation feeling is not impaired, so that erroneous operation can be prevented. Have an effect.

[Brief description of drawings]

FIG. 1 is a vertical side view showing an embodiment of the present invention.

FIG. 2 is a front view showing an electronic cash register.

FIG. 3 is a side view showing an electronic cash register.

FIG. 4 is an exploded perspective view showing an electronic cash register.

FIG. 5 is a perspective view showing a printed circuit board taken out.

FIG. 6 is an exploded perspective view showing a mounting state of operation keys.

[Explanation of symbols]

 1 Keyboard 10 Operation Keys 13 Base Panel 14, 15 Legs 16, 17 Through Hole 24 Waterproof Rib

Claims (1)

[Claims] 1. A flat base panel and an operation key having a leg portion protruding downward are provided, and the operation key is slid on the base panel into a through hole formed in the base panel. In a keyboard freely inserted and attached, a waterproof rib protruding upward on the base panel is provided so as to surround the through hole and to be located inside a projected area of the operation key projected from the vertical direction. Characteristic keyboard.