JP3823372B2 - Wireless keyboard - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wireless keyboard used for information processing equipment such as a personal computer and a word processor, and a home game machine.
[0002]
[Prior art]
FIG. 5 is a block diagram showing a circuit of a conventional wireless keyboard. In FIG. 5, reference numeral 32 denotes a microcomputer with a key wakeup function (hereinafter referred to as a microcomputer) having an input terminal 31, and the input terminal 31 includes a switch matrix. 33 is connected to the microcomputer 32, and an oscillator 34, an infrared light emitting diode 37, and a power source 35 such as a battery or a rechargeable battery are connected to form a wireless keyboard.
[0003]
Next, the operation of the wireless keyboard will be described. When the switch matrix 33 is turned on, a signal corresponding to the turn-on is output from the microcomputer 32, a wireless signal using light is generated by the infrared light emitting diode 37, and personal It is transmitted to the information processing apparatus main body such as a computer.
[0004]
When the switch matrix 33 of the wireless keyboard is not operated, the state of the microcomputer 32 is stopped by stopping the oscillation of the oscillator 34 connected to the microcomputer 32 using the key wakeup function. Thus, the current consumption is minimized and the life of the power source 35 is extended.
[0005]
The key wakeup function is to stop the oscillation of the oscillator 34 for operating the microcomputer 32 by executing software in accordance with a necessary procedure, even when the oscillator 34 is in a stopped state. This means a function that can detect a signal when the switch matrix 33 is turned on and resume the operation of the microcomputer 32 by resuming the oscillation of the oscillator 34.
[0006]
[Problems to be solved by the invention]
However, in the above conventional wireless keyboard, when the switch matrix 33 of the wireless keyboard is not operated, the key wakeup function is activated to stop the state of the microcomputer 32 and minimize the current consumption. Regardless, as shown in FIG. 6A, when a book 42 or the like is placed on the wireless keyboard 41, or as shown in FIG. 6B, the wireless keyboard 41 is placed vertically and leans against the wall 43. If the switch matrix 33 is turned on by an action such as being applied, the microcomputer 32 is brought into an operating state, so that the power source 35 is consumed by turning on the switch matrix 33 unintended by the operator, and the life is shortened. Was.
[0007]
Further, when the switch matrix 33 is always turned on in a high temperature environment, there is a problem that a wiring film (not shown) constituting the switch matrix 33 is deformed, leading to deterioration of characteristics.
[0008]
An object of the present invention is to provide a wireless keyboard in which the switch matrix does not turn on due to an unintended cause of the operator.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a method for sliding a wiring film having a switch contact portion when the wireless keyboard is not operated and moving the switch contact portion from a contact pressing portion of a rubber dome that moves up and down in conjunction with a key cap. The configuration can be shifted.
[0010]
Therefore, according to the present invention, when the operator slides the wiring film at the end of the work, the switch contact portion is not turned on due to an unintended cause of the operator, and the life of the power source can be extended. Thus, it is possible to provide a wireless keyboard that can prevent deterioration of the characteristics of the switch contact portion.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, there is provided a key cap made of molded resin having a pressing portion on the upper surface, a case made of molded resin that holds the key cap upward and downward, and a lower surface of the case. is slidably held in a horizontal direction between a recess provided on the lower surface of the disposed the rigid substrate and the casing, a pair of flexible having opposing switch contact portion which face each other with a spacer A wiring film having a rubber dome disposed below the key cap and provided on the lower surface by the pressing operation of the key cap to press the opposing switch contact portion of the wiring film; and by the pressing operation of the key cap. A microcomputer with a built-in control circuit that transmits a signal generated at the opposed switch contact portion as a wireless signal from a light emitting diode, and a power source for driving the microcomputer Tona is, a film having a slip good flexibility to receive a lower end of the rubber dome while mounted on the wiring film, provided with a through hole at a position corresponding to the projection of the rubber dome of the film structure When the operator slides the wiring film at the end of the work, the switch matrix is not turned on due to an unintended cause of the operator, power consumption can be prevented, and the opposite switch contact It is possible to provide a wireless keyboard that can prevent deterioration of the characteristics of the part and improve reliability.
Furthermore, by arranging a flexible and flexible film between the rubber dome and the wiring film, it is possible to improve the operability when the operator of the wireless keyboard slides the wiring film. By providing a through hole at a position corresponding to, it is possible to prevent an increase in switch operation load and fluctuation in operation feeling due to mounting a film, and to realize a wireless keyboard excellent in operability of light operation load Have.
[0014]
The invention of claim 2 is the invention of claim 1 Symbol placement, provided with a projecting portion having elasticity for biasing the wiring film on the case bottom surface, the switch contacts on the wiring film corresponding to the protrusion By providing a portion, the sliding position of the wiring film when the wiring film is slid is detected by the pressing state of the protrusion against the switch contact portion, and the operator can detect the wiring film. The information processing device main body such as a personal computer can recognize whether the wireless keyboard is in use or non-use based on a detection signal in a state of sliding.
[0015]
The invention according to claim 3 is the invention according to claim 1 or 2 , wherein a moderation mechanism composed of an elastic protrusion and a moderation peak is provided between the lower surface of the case and the wiring film. Yes, the moderation mechanism can securely stop the wiring film of the wireless keyboard at the used or non-used position, and when the operator slides the wiring film, it is easy to check the switching of the used or non-used state Has the effect of being able to.
[0016]
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
(Embodiment 1)
FIG. 1A is a cross-sectional view of the switch portion of the wireless keyboard according to the first embodiment of the present invention, and FIG. 1B is a cross-sectional view showing a state in which the wiring film is slid.
[0017]
In the present embodiment, the circuit configuration is the same as that of the prior art described above, and the description thereof is omitted.
[0018]
In the figure, 8 is a metal plate substrate, 2 is a molded resin case, and a pair of flexible wiring films 5 having an opposing switch contact portion 5A on the inner side of the substrate 8 with a spacer 6 interposed therebetween. Is held so as to be slidable in the horizontal direction between the lower surface recess 2 </ b> A of the case 2.
[0019]
On the other hand, the columnar portion 1A of the molded resin key cap 1 having a pressing portion on the upper surface is held vertically movably in the through hole 2B of the case 2, the lower surface of the central portion of the rubber dome 4 disposed thereunder The protrusion 4A for pressing the opposing switch contact portion 5A of the wiring film 5 protrudes downward.
[0020]
Next, the operation of the wireless keyboard provided with this switch unit will be described.
[0021]
In FIG. 1A, the rubber dome 4 is compressed by depressing the key cap 1, and the protrusion 4A is turned on by pressing the switch contact portion 5A of the wiring film 5.
[0022]
When the wireless keyboard is not used, as shown in FIG. 1B, the wiring film 5 is slid by pulling or pushing on the substrate 8 in the horizontal direction, and the wiring film 5 just below the rubber dome 4 is moved. The opposing switch contact portion 5A of the wiring film 5 can be shifted from directly below the protrusion 4A of the rubber dome 4 so that the opposing switch contact portion 5A does not come into contact even if the operator operates the key cap 1. Thus, the key will not turn on.
[0023]
Furthermore, when returning the wireless keyboard from the non-use state to the use state, if the wiring film 5 is slid in a direction opposite to the direction in which the wiring film 5 is slid, the wireless keyboard returns to the switch state at the time of use.
[0024]
In the present embodiment, the case 2 is provided with a columnar portion 1A on the lower surface of the keycap 1 so that the keycap 1 can be moved up and down, and the through hole 2B into which the columnar portion 1A fits is provided in the case 2. However, the present invention is not limited to this configuration, and any configuration may be used as long as the key cap 1 is held by the case 2 so as to be movable up and down. Needless to say.
[0025]
(Embodiment 2)
FIG. 2 is a cross-sectional view of the switch part of the wireless keyboard according to the second embodiment of the present invention. As shown in FIG. By attaching and receiving the lower end of the rubber dome 4, when the operator slides the wiring film 5, the lower surface of the rubber dome 4 is not pulled by the sliding of the wiring film 5, so that the operation is smoothly performed. Can be improved.
[0026]
By providing a through-hole 9A on the surface of the film 9 corresponding to the protrusion 4A of the rubber dome 4, it is possible to prevent an increase in switch operation load and a change in operation feel due to the film 9 being attached, and a light operation load can be prevented. A wireless keyboard with excellent operability can be realized.
[0027]
(Embodiment 3)
FIG. 3 is a cross-sectional view of an essential part of a wireless keyboard according to a third embodiment of the present invention. As shown in FIG. 3, a projection 2C provided on the lower surface of the case 2 and elastically sliding on the wiring film 5 is shown. It is possible to detect that the wiring film 5 has been slid by providing the opposing switch contact portion 5B that is pushed and opened by this, and the use state is not detected by the detection signal when the operator slides the wiring film 5. An information processing device main body such as a personal computer can recognize the state of use.
[0028]
Further, when there is an input means other than the wireless keyboard and the input means cannot take measures against an input unintended by the operator as shown in FIG. An effect can be obtained.
[0029]
(Embodiment 4)
FIG. 4 is a cross-sectional view of an essential part of a wireless keyboard according to a fourth embodiment of the present invention. As shown in FIG. 4, a moderation mechanism composed of elastic protrusions and moderation ridges provided on the lower surface of the case 2 For example, a moderation mechanism in which a ball 11 held in a round hole 2D on the lower surface of the case 2 via a coil spring 10 is brought into elastic contact with a sliding body 12 having a moderation mountain portion 12A on the upper surface mounted on the wiring film 5 is used. The wiring film 5 can be reliably stopped at the position of use or non-use, and when the operator slides the wiring film 5, it is possible to check the switching between the use state and the non-use state with a sense of moderation. The sliding operation of the wiring film 5 can be simplified.
[0030]
【The invention's effect】
As described above, according to the present invention, when the wireless keyboard is not operated, the wiring film having the opposed switch contact portion is slid, and the switch contact portion is moved from the contact pressing portion of the rubber dome that moves up and down in conjunction with the key cap. By shifting the wiring film when the operator finishes the work, the switch contact portion is not turned on due to an unintended cause of the operator, and the life of the power supply can be extended. At the same time, the advantageous effect of preventing the deterioration of the characteristics of the switch contact portion can be obtained.
[Brief description of the drawings]
The in [1] (a) a first cross-sectional view showing a state in which sliding the cross-sectional view (b) the interconnection fill arm of the switch unit of the wireless keyboard according to an embodiment of the present invention; FIG of the present invention FIG. 3 is a cross-sectional view of a switch part of a wireless keyboard according to the second embodiment. FIG. 3 is a main part cross-sectional view showing a method for detecting sliding of a wiring film of a wireless keyboard according to a third embodiment of the invention. Fig. 5 is a cross-sectional view of a main part showing a moderation mechanism of a wireless keyboard according to a fourth embodiment of the present invention. Fig. 5 is a block diagram showing a circuit of a conventional wireless keyboard. Fig. 6 is a concept showing an input example due to an unintended cause of the operator. Figure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Keycap 1A Column-shaped part 2 Case 2A Lower surface recessed part 2B Through-hole 2C Protrusion 2D Round hole 4 Rubber dome 4A Projection part 5 Wiring film 5A Opposing switch contact part 6 Spacer 8 Substrate 9 Film 9A Through-hole 10 Coil spring 11 Ball 12 Slider 12A Moderation mountain

Claims (3)

A molded resin key cap having a pressing portion on the upper surface, the molded resin case that holds the key cap in a vertically movable above the lower surface of the substrate and the case of the lower surface to be disposed the rigid of the case A pair of flexible wiring films that are held slidably in the horizontal direction between the recesses provided on the substrate and have opposed switch contact portions facing each other via a spacer, and disposed below the key cap A rubber dome in which the protrusion provided on the lower surface by the pressing operation of the key cap presses the opposing switch contact portion of the wiring film, and the signal generated at the opposing switch contact portion by the pressing operation of the key cap is wireless. a microcomputer control circuit for transmitting from the light-emitting diodes as a signal is built, Ri Do from the power source for driving it, beneath the rubber dome With slip mounting the film well having flexibility on the wiring film undergoing, wireless keyboard having a through hole at a position corresponding to the projection of the rubber dome of the film. A wiring film when the wiring film is slid by providing a protrusion having elasticity to bias the wiring film on the lower surface of the case and providing a switch contact portion on the wiring film corresponding to the protrusion. claim 1 Symbol placing wireless keyboard and to slide position of the detecting by the pressing state of the projection relative to the switch contact portion. Between the lower surface and the wiring film of the case, according to claim 1 or 2 wireless keyboard according provided detent mechanism made of an elastic projection and the detent crest portion.

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