JPH1131276A - Keyboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exchange a keyboard unit from the surface side while ensuring the drop preventing performance of a keyboard. SOLUTION: A keyboard unit 3 in which a water proof sheet is stuck to its upper face is attached from the upper side to an opening part provided on the upper face of a case 1 inclined so that the front side can be made lower. Then, a liquid tray 12 is integrally provided with the case at the lower side of the keyboard unit 3 in the case so that even when liquid spilled to the keyboard intrudes inside from a clearance between the keyboard unit 3 and the case 1, the liquid can be remained without being dropped. Also, the part of the liquid tray 12 covered with the keyboard unit 3 is provided with a through- hole 15 for allowing a connection cable 10 to pass, and a water wall 16 is provided like a bank in the surrounding of the through-hole 15. Moreover, a water proof sheet 19 is provided between the liquid tray 12 and a control circuit substrate 9, and even when liquid is dropped beyond the water wall 16, it can be prevented from being dropped to the control circuit substrate 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard having a drip-proof function, and more particularly to a keyboard suitable for a POS register.

[0002]

2. Description of the Related Art In a store such as a fast food store, which is based on face-to-face sales, products are usually delivered through a POS register. In such stores, many drinks in cups such as juice and coffee are sold, and when delivering such drinks, troubles such as spilling the drinks on the POS register often occur. Also,
Such a POS register is wiped with a wet cloth even during daily cleaning. Therefore, in a POS register used in such a store, it is strongly required that the POS register has a drip-proof structure centered on a keyboard.

FIG. 5 is an external view of a conventional POS register having a drip-proof function. In FIG. 5, reference numeral 1 denotes an upper case made of resin among two upper and lower cases of a keyboard, 2 denotes a lower case also made of metal, 3 denotes a keyboard unit having a product menu key 3A and a function key 3B, Reference numeral 4 denotes an operation display for displaying a product name, a price, a total amount, and the like in accordance with a key operation of the keyboard unit 3, reference numeral 21 denotes a mode selection key for selecting an operation mode, reference numeral 26 denotes a waterproof sheet, and reference numeral 27 denotes a RAM card inserted. Mouth. Reference numeral 30 denotes a keyboard including the above components, 31 denotes a printer that prints out receipts and sales summary tables, and the like. 32
Denotes a cash drawer. The keyboard 30 and the printer 31 are placed side by side on the cash drawer 32 so as to be separable from each other.

FIG. 6 is a schematic internal view of a conventional POS register keyboard, and FIG. 7 is a top view thereof. Reference numerals 1 to 4, 21, and 26 correspond to those in FIG.
Reference numeral 5 denotes a customer display for displaying a product price, a total sales amount, and the like to a customer, 6 denotes a power supply unit that converts a commercial AC power into DC and supplies it to an internal circuit, and 7 denotes various types of signals from an external device. Lower case 2 for connecting the cable connector
, A connection space formed by recessing the bottom plate inside, 8 is a connector for connecting those cable connectors, 9 is a control circuit board, 10 is a connection cable, and 11 is a connection cable 10 to the keyboard unit 3. And 20 are keys of the keyboard unit 3. Normal,
The key 20 is hidden under the key display sheet and is not directly visible from the surface. The internal wiring other than the connection cable 10 is omitted here.

A waterproof sheet 26 is provided on the upper surface of the upper case 1.
Is attached, so that even if liquid spills on the keyboard, it does not enter the inside of the keyboard and the keyboard unit 3. Since the waterproof sheet 26 is attached to the upper surface of the upper case 1 in this manner, the keyboard unit 3 cannot be attached from the front side, and is screwed from the inside of the upper case 1. I have. Although not shown, a RAM card inserted through a RAM card insertion slot 27 (FIG. 5) provided at an appropriate height on the side surface of the upper case 1 is provided on the upper surface of the rear end of the control circuit board 9. Connector is directly attached. The control circuit board 9 is provided obliquely with respect to the bottom surface because the connector needs to be aligned with the RAM card insertion slot 27 and the connection space 7 is secured. 1 through a spacer (not shown).

[0006] In such a POS register keyboard, keys are set for each product, and each key is pressed each time the corresponding product is sold. The keys of well-selling products are pressed more frequently, and the contacts are worn out more. Under such circumstances, in this type of POS register, the keyboard unit 3 is frequently replaced due to a failure.

[0007]

However, in the above-mentioned conventional drip-proof keyboard, a waterproof sheet 2 is provided on the surface.
6, the keyboard unit 3 is not configured to be attached and detached from the front side of the upper case 1. When the keyboard unit 3 is replaced, the keyboard body bottom plate is removed and control is performed. The replacement work must be performed after the circuit board 9 is removed, which is very troublesome.

As a means for solving this problem, a waterproof sheet is provided on the surface of the keyboard unit 3 to make the keyboard unit 3 itself drip-proof, and the keyboard unit 3 is connected to the upper case 1 and the keyboard unit 3 from above. It is conceivable that a packing is interposed therebetween and screws or the like are used.
By doing so, even if a liquid spills on the upper case 1, it can be prevented from entering the inside, and the keyboard unit 3 can be attached and detached from the front side, and the replacement work of the keyboard unit 3 becomes easy. However, in such a case, the spilled liquid accumulates between the packing, which is difficult to clean, and the upper case 1 and the keyboard unit 3, resulting in unsanitary and adversely affecting the keyboard unit 3. In addition, keyboard unit 3
There is a problem in that a set screw for fixing the fixing member is exposed on the surface, and dissatisfaction remains in appearance.

SUMMARY OF THE INVENTION The present invention solves such a problem and allows the keyboard unit to be attached and detached from the front side while ensuring the drip-proof performance of the keyboard.
Another object is to improve the appearance.

[0010]

According to a first aspect of the present invention, there is provided a keyboard unit having a waterproof sheet attached to an opening provided on an upper surface of a case which is inclined so that a front side thereof is lower. From the upper side, in the case below the keyboard unit,
A liquid receiving pan is provided integrally with the case with an interval between the lower surface of the keyboard unit and the liquid receiving pan so as to be lower on the front side, and a portion of the liquid pan covered by the keyboard unit is provided with a keyboard unit and a control circuit. It is characterized in that a through hole for passing a connection cable for connecting to a substrate is provided, and a waterproof wall is provided around the through hole in a bank shape. In this way, while maintaining the drip-proof performance of the keyboard,
The keyboard unit can be attached and removed from the front side.

The keyboard according to a second aspect of the present invention is characterized in that a waterproof sheet is provided between the liquid receiving tray and the control circuit board. In this way, even if a large amount of liquid accumulates in the liquid receiving tray and spills down over the bank-shaped waterproof wall, the liquid does not fall on the control circuit board.
The keyboard according to a third aspect of the present invention is characterized in that a frame plate is placed from above on a boundary portion between the keyboard unit and the case. This way,
Even if the keyboard unit is screwed, the head of the screw can be hidden by the frame plate, and the appearance is improved. Further, the key display sheet of the keyboard unit can be sandwiched by using the frame plate.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment) FIG. 1 is an internal schematic view of a first embodiment, and FIG. 2 is a top view thereof. Sign 1
11, 20, and 21 correspond to those in FIGS.
Denotes a liquid receiving tray, 13 denotes a keyboard mounting step, 14 denotes a frame plate mounting step, 15 denotes a cable through hole, 16 denotes a waterproof wall, 17 denotes a set screw, 18 denotes a frame plate, and 19 denotes a waterproof sheet.

A liquid receiving tray 12 is provided integrally with the upper case 1 below the opening of the keyboard unit 3 in the upper case 1. The keyboard unit 3 has a waterproof sheet adhered to the upper surface, and the keyboard unit 3 having the drip-proof structure itself is formed around a mounting opening of the upper case 1. It is placed on the part 13 from above, and is fixed to the upper case 1 with a set screw 17. In this way, the keyboard unit 3 is attached from the front side of the upper case 1,
It can be removed.

However, in this state, the head of the set screw 17 is visible on the surface, which is not preferable in appearance. Therefore, the frame plate mounting step 14 is provided outside the keyboard mounting step 13, and the set screw 17 The frame plate 18 is fitted so as to cover the head. The frame plate 18 can also be used to sandwich a key display sheet for displaying keys of the keyboard unit 3. If you do that,
When the key setting is changed, the display sheet can be easily exchanged.

On the lower side of the keyboard unit 3,
At a distance from the keyboard unit 3, the liquid pan 12
It is provided integrally with the upper case 1 so as to block the space between the keyboard unit 3 and the control circuit board 9. And
The liquid receiving tray 12 is provided with a cable through-hole for passing a connection cable 10 connecting the keyboard unit 3 and the control circuit board 9. The cable through-hole 15 is provided in a portion of the liquid receiving tray 12 at a low position on the keyboard side of the operator and covered by the keyboard unit 3, and a waterproof wall 16 is provided around the periphery thereof in a bank shape.
Further, a waterproof sheet 19 is provided so as to cover the control circuit board 9.

In this way, even if a liquid such as juice spills on the keyboard, the keyboard unit 3 itself is prevented from entering the liquid by the waterproof sheet adhered to its surface. Further, even if the liquid enters through a gap between the upper case 1 and the keyboard unit 3, the entering liquid is received by the liquid receiving tray 12, and the liquid flows down from the cable through hole 15 by the waterproof wall 16. Try to prevent. Further, even if the amount of liquid accumulated in the liquid receiving tray 12 increases and overflows from the cable through hole 15 beyond the waterproof wall 16, the liquid is controlled by the waterproof sheet 19 on the control circuit board 9. The lower case 2 is allowed to fall to the bottom without lowering on the circuit board 9. The liquid that has dropped to the bottom of the lower case 2 is discharged to the outside through a slit provided in the bottom plate of the lower case 2 for internal cooling.

(Second Embodiment) FIG. 3 is a schematic internal view of a second embodiment, and FIG. 4 is a top view thereof. The reference numerals correspond to those shown in FIGS. 1 and 2, 22 is a metal fixing plate also serving as a shield, 23 is a cutout portion, 24 is a spacer, and 25 is a waterproof sheet.

In this keyboard, since the RAM card insertion slot is provided on the near side (operator side), a RAM card connector (not shown) needs to be attached to the front end of the control circuit board 9. 9 for lower case 2
Are provided in parallel to the bottom surface of the. The control circuit board 9
The fixing plate 22 fixed to the lower case 2
It is attached with intervening.

Further, the connection space 7 cannot be arranged below the control circuit board 9 as in the first embodiment because the control circuit board 9 is mounted horizontally. Therefore, the connection space 7 is provided on the rear side of the control circuit board 9, and the power supply unit 6 located at that position is fixedly provided on the fixed plate 22 in the space on the rear upper side of the control circuit board 9. The connector 8 is provided on the top plate of the connection space 7 so as to face upward.

The mounting structure of the keyboard unit 3 and
The structures of the liquid receiving tray 12, the cable through hole 15, and the waterproof wall 16 are the same as in the first embodiment. Therefore, when the liquid spills on the keyboard, even if the liquid intrudes from the gap between the upper case 1 and the keyboard unit 3, the intruding liquid is received by the liquid receiving tray 12 and stored on the near side. . However, a different measure is taken when the amount of liquid accumulated in the liquid receiving tray 12 increases and overflows from the cable through-hole 15 below the waterproof wall 16.

Below the cable through hole 15, a fixing plate 2
2 on which a power supply unit 6 is mounted. Therefore, when the liquid overflows downward from the cable through hole 15, there is a possibility that the liquid flows on the fixing plate 22 and wets the power supply unit 6. Then, fixed plate 2
2, a notch 23 is provided below the cable through hole 15;
Further, between the fixing plate 22 and the control circuit board 9, a waterproof sheet 25 also serving as insulation is provided so as to be inclined rearward.
As a result, when the liquid overflows downward from the cable through hole 15, the liquid falls on the waterproof sheet 25, and travels along the same to fall on the bottom surface of the lower case 2. Then, the air is discharged to the outside through a slit provided in the bottom plate of the lower case 2.

In the first and second embodiments, the outlet of the liquid collected in the liquid receiving tray 12 is connected to the cable through hole 1.
Although there is no particular arrangement other than 5, a liquid drainage path may be provided at the lowermost end of the liquid receiving tray 12, and the liquid flowing into the liquid receiving tray 12 may be discharged therefrom.

[0024]

Since the present invention is configured as described above, it has the following effects. That is, in the keyboard according to the first aspect, the keyboard unit having the waterproof sheet adhered to the upper surface is attached to the opening provided on the upper surface of the case from the upper side, so that the keyboard unit can be attached and detached from the front side. become. In addition, a waterproof sheet is attached to the upper surface of the keyboard unit, and a liquid pan is provided below the keyboard unit, so that the keyboard unit itself has drip-proof performance, and liquid invades from the gap in the keyboard unit mounting part. However, it is possible to prevent the internal circuit from being reached. Furthermore, since the waterproof wall is provided in the shape of a bank around the cable through hole, it is possible to prevent liquid from entering through the cable through hole.

Further, in the keyboard according to the second aspect of the present invention, since the waterproof sheet is provided between the liquid receiving pan and the control circuit board, the liquid accumulated in the liquid receiving pan may spill down over the waterproof wall. Even so, the control circuit board is protected by the waterproof sheet.

The keyboard according to a third aspect of the present invention is characterized in that at the boundary between the keyboard unit and the case,
Since the frame plate is covered from the upper side, even if the keyboard unit is screwed, the head of the screw can be hidden by the frame plate, and the appearance is improved. Further, the key display sheet of the keyboard unit can be sandwiched by using the frame plate.

[Brief description of the drawings]

FIG. 1 is an internal schematic diagram of a first embodiment.

FIG. 2 is a top view of the first embodiment.

FIG. 3 is an internal schematic diagram of a second embodiment.

FIG. 4 is a top view of the second embodiment.

FIG. 5 is an external view of a conventional POS register having a drip-proof function.

FIG. 6 is an internal schematic diagram of a conventional POS register keyboard.

FIG. 7 is a top view of a conventional POS register keyboard.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Upper case 2 ... Lower case 3 ... Keyboard unit 4 ... Operation display 5 ... Customer display 6 ... Power supply unit 7 ... Connection space 8, 11 ... Connector 9 ... Control circuit board 10 ... Connection cable 12 ... Liquid Receiving tray 15 ... Cable through hole 16 ... Waterproof wall 17 ... Set screw 18 ... Frame plate 19,25,26 ... Waterproof sheet 22 ... Fixing plate 23 ... Notch 24 ... Spacer 27 ... RAM card insertion slot 30 ... Keyboard 31 ... Printer 32 … Cash drawer

Claims (3)

[Claims] 1. A keyboard unit having a waterproof sheet attached to an upper surface thereof is mounted on an opening provided on an upper surface of a case inclined such that a front side is lowered, and a case is provided in the lower case of the keyboard unit. The liquid receiving pan is provided so as to be spaced apart from the lower surface of the keyboard unit so as to be lower on the front side, and the keyboard unit and the control circuit board are provided at a portion of the liquid receiving pan covered with the keyboard unit. A through-hole through which a connection cable for connecting the cable is passed, and a waterproof wall provided in a bank shape around the through-hole. 2. The keyboard according to claim 1, wherein a waterproof sheet is provided between the liquid receiving tray and a control circuit board. 3. The keyboard according to claim 1, wherein a frame plate is placed from above on a boundary between the keyboard unit and the case.