JP3796814B2 - Seesaw type switch mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seesaw type switch mechanism used in an electronic device or the like in which a switch attached to a printed circuit board and a knob for pressing the switch are separated.
[0002]
[Prior art]
In recent years, an increasing number of information processing apparatuses such as word processors having a built-in printer apparatus electrically perform paper feeding of a printer by a motor rather than manually.
FIG. 2 shows a partial cross-sectional view of an information processing apparatus incorporating a conventional printer and its seesaw type switch mechanism. In FIG. 2, reference numeral 21 denotes an information processing apparatus main body, which includes a printer device (not shown). Reference numeral 22 denotes a seesaw type knob having two pressing portions 22a and 22b, which are operatively attached to the information processing apparatus main body 21. Two tact switches 23 for performing sheet feeding of the printer device are respectively attached to the printed circuit board 24 below the two pressing portions 22a and 22b. A lead wire 26 connects the printed circuit board 24 to a printed circuit board 25 that controls the information processing apparatus main body 21.
[0003]
A conventional seesaw type switch mechanism configured as described above will be described with reference to the drawings. In order to feed the paper of the printer, the two pressing portions 22a or 22b of the seesaw type knob 22 are pushed. The seesaw type knob 22 is interlocked with the switch 23 and the tact switch 23 is pushed. A signal from the tact switch 23 is sent to the printed circuit board 25 through the lead wire 26 to control a paper feed motor (not shown). By this control, the paper is fed in the forward direction when one of the switches is pressed, and in the reverse direction when the other switch is pressed.
[0004]
[Problems to be solved by the invention]
However, in such a conventional seesaw type switch mechanism, since the printed circuit board to be controlled is separated from the seesaw type knob, a dedicated printed circuit board for the switch and a lead wire for relay are required, and the number of assembly steps is increased. As it increases, defects tend to occur.
[0005]
An object of the present invention is to solve such problems, and to provide a seesaw type switch mechanism having a simple configuration that does not require a dedicated printed circuit board for a switch and a lead wire for relay.
[0006]
[Means for Solving the Problems]
In the seesaw type switch mechanism of the present invention, the portions interlocking with the switches at both ends of the seesaw type knob are each made of a thin part, and the two thin parts are sandwiched from both sides, and the thin parts are brought into contact with each other when the seesaw type knob is pressed. With this configuration, the rotational motion of the seesaw type knob is changed to a linear motion.
[0007]
According to the present invention, even if the seesaw type knob and the printed circuit board to be controlled are separated from each other, the lead wire for relay and the printed circuit board dedicated to the switch are not required, and the seesaw type knob body is guided with a light operating force. A seesaw type switch mechanism having a simple configuration that can be operated in a specific direction is obtained.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, two switch pressing portions having a substantially target shape are provided on both sides, two first thin portions having elastic force are provided on both ends, and a second thin portion having elastic force is provided on both ends. In the center, the two first thin portions are respectively a surface for pushing a switch at the tip, a seesaw-type knob body having opposing surfaces facing each other , and both sides of the two first thin portions. A guide part provided on the side, a holding part for holding a part of the second thin part from both sides, a support part provided near the tip of the second thin part, and supporting the seesaw-type knob body, And when the pressing portion of the seesaw type knob main body is pressed, the two first thin portions are guided by the guide portion, and the opposing surfaces are brought into contact with each other, thereby causing a rotational motion. and characterized in that the change in linear motion Seesaw-type switch mechanism that uses the deflection of the thin-walled part, eliminates the need for lead wires for relays and printed circuit boards dedicated to the switch, and integrates the seesaw-type knob body with a light operating force. such an action can Rukoto changed rotational motion to linear motion type knob body.
[0010]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.
(Embodiment 1)
FIG. 1 is a partial sectional view showing a seesaw type switch mechanism of the present invention. In FIG. 1, reference numeral 1 denotes an information processing apparatus main body, which includes a printer device (not shown). Reference numeral 2 denotes a seesaw type knob having two pressing portions 2a and 2b, and is operatively attached to the information processing apparatus main body 1. At both ends of the seesaw type knob 2, a thin portion 3 and a thin portion 4 having a substantially target shape are formed. A thin portion 5 is also formed at the center of the seesaw type knob 2. All the three thin portions have elasticity. When the seesaw type knob 2 is supported by a thin portion 5 at the center of the information processing device main body 1 by a fulcrum portion 6 and a clamping portion 7 provided on the information processing device main body 1, the two pressing portions 2a are pressed. Then, a seesaw-shaped rotational motion is performed with the fulcrum part 6 and the clamping part 7 as fulcrums. The thin-walled portion 3 and the distal end portion of the thin-walled portion 4 have surfaces 3a and 4a for pressing the tact switch 9 on the printed circuit board 8 attached to the information processing apparatus main body 1, and opposite surfaces 3b and 4b. . In addition, guide portions 10 are provided on both sides of the thin portion 3 and the thin portion 4.
[0011]
The seesaw type switch mechanism of the present invention configured as described above will be described with reference to the drawings. In order to feed the paper of the printer device, the pressing portion 2a of the seesaw type knob 2 is pushed. The seesaw-type knob 2 performs a seesaw-shaped rotational movement with the fulcrum part 6 and the clamping part 7 of the information processing apparatus main body 1 as fulcrums. At this time, the thin portion 3 also tries to rotate around the same fulcrum, but first, the opposing surface 3 b of the thin portion 3 presses the opposing surface 4 b of the thin portion 4. However, since the movement of the thin portion 4 in the rotational direction is restricted by the guide portion 10, the thin portion 3 also operates only slightly in the rotational direction. When the switch knob is pressed, the amount of movement in the rotational direction is flexed by the thin portion 3 due to elasticity, and is converted into an amount of movement in the linear direction, and the tact switch 9 is pushed.
[0012]
A signal from the tact switch 9 is sent to a control circuit in the printed circuit board 8 to control a paper feed motor (not shown). The same applies when the other pressing portion 2b of the seesaw type knob 2 is pressed. By this control, the paper is fed in the forward direction when one of the switches is pressed, and in the reverse direction when the other switch is pressed.
Further, when the seesaw type knob 2 is pressed, since the thin portion 5 also has elasticity, the seesaw movement can be performed with a little pressing force by bending when the seesaw type knob 2 is pressed. Power can also be reduced.
[0013]
【The invention's effect】
As described above, according to the present invention, when the seesaw type knob and the printed circuit board for control are separated from each other, the switch knob body can be integrated into a simple structure, and the seesaw type knob body can be rotated with a light operating force. seesaw type switch mechanism that can Rukoto changed into a linear movement is obtained.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing a seesaw type switch mechanism according to an embodiment of the present invention. FIG. 2A is an external perspective view of an information processing apparatus incorporating a conventional seesaw type switch mechanism. FIG. Partial sectional view showing the mechanism 【Explanation of symbols】
DESCRIPTION OF SYMBOLS 1 Information processing apparatus main body 2 Seesaw-type knob 2a, 2b Press part 3, 4, 5 Thin part 3b, 4b Opposite surface 6 Supporting point part 7 Clamping part 10 Guide part

Claims (1)

Two switch pressing parts having a substantially target shape are provided on both sides, two first thin parts having elasticity are provided at both ends, and a second thin part having elasticity is provided at the center, and the two first thin parts are provided . Each of which includes a surface for pressing the switch at the tip, a seesaw-type knob body having opposing surfaces facing each other , guide portions provided on both sides of the two first thin portions, and the second a clamping portion for clamping a portion of the thin portion from both sides, is provided in the vicinity of the tip of the second thin portion, and a fulcrum portion as a fulcrum to support the said seesaw type knob body, the seesaw type knob body The seesaw-type switch is characterized in that when the pressing portion is pressed, the two first thin-walled portions are guided by the guide portion and the opposing surfaces are brought into contact with each other to change the rotational motion into a linear motion. mechanism.

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