JPS6234344Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a keyboard device, and more particularly, to a heat dissipation mechanism in a keyboard comprising a printed board and a panel.

Conventionally, in keyboard devices that generate a considerable amount of heat internally, vent holes have been provided in the heat generating portion or the side thereof, but no special consideration has been taken beyond that. FIG. 1 shows a conventional keyboard device in cross section. In the figure, 1 is a key top, 2 is a slider, 3 is a keyboard printed board, 4 is a keyboard panel, 5 is a switch, and 6 is a keyboard.
is an integrated circuit (IC), 7 is a central processing unit (CPU) board, 8 is a power supply, 9 is a lower cover, 9
a and 9b indicate the side covers, respectively. In such devices, attempts have been made to exhaust air through the side covers 9a and 9b as shown by arrows A and B, but a sufficient heat dissipation effect cannot be obtained.

The keyboard device shown in FIG. 1 has a hollow box-like structure with an inclined top surface, such as an English typewriter, and the figure is a side sectional view of the device. The keyboard panel 4 is made as a single piece, for example by molding, on which a plurality of keytops 1 are held and arranged, for example in a grid. When the operator presses the key top 1, the slider 2 moves downward and contacts the switch 5, and a signal is sent to the CPU 7 to perform a predetermined operation (for example, printing). In the figure, only one switch 5 is shown for the sake of clarity.

In recent years, devices using keyboards have become smaller, and electronic circuits and power sources that generate heat are housed in small-volume casings, causing an increase in temperature inside the casing to become a problem.

The purpose of the present invention is to solve the above-mentioned problems of the conventional technology, and for this purpose, a chimney-shaped ventilation section is formed in the keyboard panel where the key tops are held and arranged, and a ventilation mechanism not seen in conventional keyboards is provided. This enables an effective ventilation mechanism with a simple structure of the keyboard, thereby suppressing the temperature rise inside the housing.

In another embodiment of the present invention, in a keyboard that combines a printed board on which a large number of switches are arranged and a keyboard panel that holds key tops (key buttons), a space on the key top side of the keyboard panel and a space on the printed board Ventilation is achieved by using a panel/printed board fitting member that has a chimney-like cavity that connects the space on the opposite side of the keyboard panel.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 2 shows a cross-sectional view of the main parts of the first embodiment of the present invention, and in this figure and the following figures, the same parts as shown in FIG. The parts shown in FIG. 1 are the same as those shown in FIG. In this first embodiment, the keyboard panel 14 is molded, and a chimney-shaped raised vent 11 for ventilation is formed between the part of the keyboard panel that receives the slider 2. This differs from the device shown in FIG. 1 in this respect. With this configuration of the keyboard panel 14, for example, the keyboard panel 14 can be mounted on the CPU board 7.
Heat emitted from the IC 6 passes through a heat release hole 10 formed in the printed circuit board 3, and is emitted to the outside of the keyboard through a ventilation portion 11 as shown by arrow C in the figure. In FIG. 2, reference numeral 13 indicates a contact for the switch 5.

In the embodiment described above, the heat emitted from the printed circuit board, power supply, etc. disposed inside the keyboard is transferred to the keyboard panel 14, which has a relatively large area.
The heat is released from a plurality of ventilation portions 11 provided in the keyboard, and this heat radiation, together with the heat radiation in the conventional device shown by arrows A and B in FIG. 1, is effective in discharging warm air inside the keyboard.

In addition to the above, on the side of the keyboard panel 14 facing the keytops, the molded part of the vent is raised like a chimney, so that falling objects can pass through the vent and into the keyboard panel 14, e.g. Falling onto the printed circuit board 3 is prevented, and there is no risk of secondary damage occurring at this point.

Furthermore, when the surface area of the key top 1 is relatively large as shown in FIG. This prevents liquids such as water from passing through the ventilation holes and dripping onto the printed board 3, which is more effective in preventing secondary troubles.

In the first embodiment, the keyboard panel 1
4 and the printed circuit board 3 on which the switch 5 is mounted, but in other embodiments of the present invention described below, the ventilation section of the first embodiment is replaced by the switch mounted under the keyboard panel. This is a structure into which a printed board is fitted.

In a second embodiment of the present invention, shown in cross-section in FIG. 3, the keyboard panel 24 is molded, and the hollow vent 11 for ventilation extends perpendicularly to the keyboard panel 24 and has an end portion thereof. A claw portion 12 is formed in the. This claw part 12
The keyboard panel 24 and the heat release hole 10 of the printed board 3 on which the switch 5 is mounted are fitted, and the keyboard panel 24 and the printed board 3 move integrally. In such a device, the heat release hole 10 and the ventilation section 11 in the example shown in FIG. 2 are integrated, so that the IC 6 on the CPU board 7
The heat is more efficiently discharged as shown by arrow C in the figure.

FIG. 4 shows a third embodiment of the present invention in cross section, in which the keyboard panel 34 is made of sheet metal and the switch 15 is disposed around the slider 2. In this embodiment, the keyboard panel 34 is also provided with a heat release hole 10' in advance, and the heat release hole 10' and the heat release hole 10 of the printed board 3 are made of, for example, a resin material as shown in a perspective view in FIG. A hollow ventilation part 19 made of aluminum is fitted. For the purpose of such fitting, the ventilation portion 19 has claw portions 12' disposed above and below to face each other. In this embodiment, the ventilation section 11 of the embodiment of FIG.
is formed integrally with the keyboard panel 24, whereas the ventilation section 19 is created separately and fitted to the keyboard panel 34 and the printed circuit board 3, which has the advantage of being easy to manufacture. For example, heat from the IC 6 on the CPU board 7 is released as shown by arrow C in the figure.

As explained above, according to the present invention, by providing the keyboard panel with a ventilation section that acts like a chimney, heat generated from the IC, power supply, etc. within the keyboard panel is efficiently exhausted, and in addition, the ventilation section of the keyboard panel By raising the edge or placing it under the key top, secondary problems such as foreign objects falling onto the printed circuit board inside the keyboard can be prevented, and liquid can also be prevented from entering the keyboard.
In the example shown, it is prevented by key top 1 and key top 3.
In the example shown in Figures 1 and 4, the vents 11 and 19 are relatively long and extend perpendicular to the keyboard but at an angle to the horizontal plane, thus preventing liquid from entering the device. Ru. Such a ventilation section can also have a structure that integrally connects the keyboard panel and a printed board underneath which is mounted with switches and the like. Note that during operation, hot air is discharged from the ventilation section to the outside of the keyboard device, so that dust and the like are prevented from entering the keyboard device through the ventilation section. When not in operation, the equipment is covered as is common practice.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional keyboard device, Figure 2 is a sectional view of a conventional keyboard device.
3, and 5 are sectional views of the keyboard device according to the present invention, and FIG. 4 is a perspective view of a hollow fitting used in the device of FIG. 3. 1... Key top, 2... Slider, 3... Printed board, 4, 14, 24, 34... Keyboard panel, 5, 15... Switch, 6... IC, 7
...CPU board, 8...Power supply, 9...Lower cover, 10,10'...Heat vent, 11,19...
Ventilation part, 12, 12'...Claw part, 13...Contact.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a keyboard device having a keyboard panel holding a key top integrated with a printed board and a plurality of sliders, a chimney-shaped bulge between the slider receiving portions of the keyboard panel A keyboard device characterized by being provided with a ventilation section. (2) The key top side space of the keyboard panel and the space on the opposite side of the keyboard panel board of the printed board disposed below the keyboard panel are the keyboard panel that integrally connects the keyboard panel and the printed board. The keyboard device according to claim 1, characterized in that the keyboard device is configured to be ventilated by a ventilation portion provided in the utility model. (3) Claim 2 of the utility model registration, which is characterized in that the ventilation section is fitted into the keyboard panel and the printed board, thereby providing ventilation.
Keyboard devices as described in section.