JPH0789463B2 - Electronics - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electronic device, and more specifically, one of printed circuit boards arranged facing each other is deformed by a slider,
The present invention relates to an electronic device including a switch that performs a switching operation by bringing the contacts of both substrates into contact with each other.

[Prior Art] In recent years, a keyboard switch using a flexible printed circuit board has been widely used with the miniaturization and thinning of small electronic devices such as an electronic desk calculator (hereinafter referred to as a calculator) and an electronic translator. This type of switch has advantages that it can be easily miniaturized and thinned and that mass production is easy. In addition to push-type switches, there are slide switches and other switches that use flexible printed circuit boards.

A slide switch using a conventional flexible printed circuit board uses a slider of the slide switch to press and deform the upper contact of the flexible printed circuit board made of polyester, which is similar to the push-type switch, to deform another printed circuit board pattern. The contact is made with the lower contact.

However, since the slide switch is often fixed to the same position for a long time due to its nature, there is a drawback that the return of the upper contact becomes unstable after switching the position, which causes a malfunction. This tendency was particularly strong when the flexible printed circuit board was made of polyester and the contacts were formed by attaching metal foil. Further, in the case where the positions of the switches are close to each other for downsizing, the mutual contact interference also affects the contacts, and the contacts may not be easily restored.

[Purpose] The present invention has been made in view of the above problems, and a switch that can reliably perform contact recovery according to a switching operation even when the same position is set for a long time and can perform a highly reliable switching operation. It is an object to provide an electronic device having a ride switch.

[Structure of the Invention] In order to achieve the above object, the present invention includes two printed circuit boards which are vertically opposed to each other and have contacts with each other.
A slider that slides on the upper printed circuit board of the two sheets, a slit provided on the upper printed circuit board in a direction that is not orthogonal to the sliding direction of the slider, and a slider for moving the slider to the upper printed circuit board. An elastic member that protrudes upward from an opening formed in a lower printed circuit board of the two sheets against the pressure and presses the upper printed circuit board upward; The structure of the electronic device is adopted in which the upper printed circuit board is deformed and the switching operation is performed by bringing the contacts of the two printed circuit boards into contact with each other.

[Examples] Hereinafter, the present invention will be described in detail based on examples shown in the drawings.

FIG. 1 shows an embodiment of an electronic device of the present invention. Here, an external perspective view of a calculator is shown, in which various calculations are performed according to operation input from the keyboard and the results are displayed on a display such as an LCD.

The calculator case 1 consists of an upper case 2 and a lower case 6a,
A keyboard 4 including a numeric keypad and other calculation keys is provided on the front side of the upper surface of the upper case 2. Further, in front of the upper case 2, a display device 3 for displaying a calculation result, a process and the like is provided. A slide switch 5 used for switching the calculation mode is provided between the display 3 and the keyboard 4.

2 to 4 show the structure of the slide switch 5 as an exploded perspective view and a sectional view. FIG. 3 shows a cross section of the slide switch in the direction perpendicular to the sliding direction of FIG. 2, and FIG. 4 shows a cross section parallel to the sliding direction. In FIG. 1, a slider 6 having a knob protruding above the upper case 2
Each member as shown in the drawing is laminated underneath.

A positioning pin 5a is provided on the lower surface of the slider 6 as shown in FIGS. 3 and 4, and a thin plate is removed from the center of the thin metal plate and a bent leaf spring 7 is attached to the positioning pin 5a. Has been.

Below the leaf spring 7, sheet-shaped members denoted by reference numerals 8, 11 and 13 are laminated.

The uppermost flexible printed board 8 is made of a thin plate of polyester or the like, and a plurality of upper contacts 9a of the slide switch are formed as a conductive pattern on the lower surface shown in perspective in FIG. A U-shaped slit 10 is formed between each of these upper contacts. The upper contact 9a is the leaf spring 7
It is formed to have almost the same length as the width of the pressing portion 7a and is connected to the conductive pattern 9b.

An insulating plate 11 having a square hole 12 having an opening area substantially equal to the area of the upper contact 9a is laminated under the flexible printed board 8.

Below the insulating plate 11, a printed circuit board 13 on which a conductive pattern is formed as a lower contact 14a is laminated on the upper side. Lower contact 14a
Are connected to the conductive pattern 14b. The operation input signal is transmitted through the flexible printed circuit board 8 and the conductive patterns 9b and 14b of the printed circuit board 13.

The lower contact 14a is not provided in the entire area of the upper contact 9a as shown in FIG. 2, and most of the area of the upper contact 9a is an opening 15 on the printed circuit board 13 as shown in FIG. There is.

An elastic member 16 is held at the position of the opening 15 by a reinforcing plate 17 from the lower surface. The elastic member 16 is formed into a prismatic shape from foamed rubber or the like, and is fitted into a holding portion 19 of a reinforcing plate 17 formed by press-molding a metal plate. The thickness of the elastic member 16 is the fourth
As shown in the figure, the size is such that it projects upward from the opening 15 of the printed circuit board 13 and contacts the lower surface of the flexible printed circuit board 8.

The above laminated members are fixed by fixing the reinforcing plate 17 to the upper case with screws 20a and 20b through the round holes 18a and 18b. However, the fixing of the laminated structure is not limited to this method, and another fixing method may be used.

In the above structure, when the slider 6 is set at a certain position, as shown in FIG.
7a elastically deforms the flexible printed circuit board 8 to bring the upper contact 9a on the lower surface thereof into contact with the lower contact 14a of the printed circuit board 13 through the opening 12. At this time, the pressing portion at the tip of the leaf spring 7 simultaneously elastically deforms the elastic member 16 as shown in FIG.

Therefore, when the slider 6 is switched from a certain position to a certain position, the upper contact 9a of the flexible printed circuit board 8 which has been pressed until then is forcibly returned to the original position by the elastic force of the elastic member 16, and the lower contact 14a Be sure to separate them. Therefore, unlike the conventional case, the malfunction due to the erroneous contact of the contacts does not occur. Further, the slits 10 between the upper contacts 9a enable the flexible printed circuit board 8 in each contact region to move independently, so that the above separating action is surely performed even when the distance between the contacts is set to be small. A high switching operation can be performed.

Although the prismatic member is exemplified as the elastic member 16 in the above embodiment, as shown in FIG.
Etc. may be used. Similar to FIG. 4, FIG. 5 shows a cross section along the sliding direction of the slide switch, and the structure of the other parts is the same as the above. With such a structure, the same effect as described above can be obtained.

The structure shown above is not limited to the illustrated calculator, and can be implemented in other electronic devices, particularly large-sized devices.

[Effect] As is apparent from the above description, according to the present invention, two printed boards which are vertically opposed to each other and have contact points with each other, and an upper printed board of the two boards are slid on each other. A slider that moves, a slit provided on the upper printed circuit board in a direction that is not orthogonal to the sliding direction of the slider, and a lower print of the two sheets when the slider presses the upper printed circuit board. An elastic member that protrudes upward from an opening formed in the substrate and presses the upper printed circuit board upward, and the slider is slid to deform the upper printed circuit board, and the two printed sheets are printed. Adopting the configuration of electronic equipment that performs switching operation by contacting the contacts of the board, even if it is set to the same position for a long time, reliable contact is ensured without causing accidental contact It is possible to provide an electronic device having a switch that can perform a highly efficient switching operation.

[Brief description of drawings]

FIG. 1 is an external perspective view of a calculator adopting the present invention, FIG. 2 is an exploded perspective view showing the structure of a slide switch portion of the device of FIG. 1, and FIG. 3 is a slide switch of the device of FIG. FIG. 4 is a sectional view showing a section perpendicular to the sliding direction, FIG. 4 is a sectional view showing a section taken along the sliding direction of the slide switch of the apparatus shown in FIG. 1, and FIG. 5 is another embodiment of the present invention. FIG. 6 ... Slider, 7 ... Leaf spring 8 ... Flexible printed circuit board 9a ... Upper contact, 10 ... Slit 11 ... Insulation plate, 12, 15 ... Opening 13 ... Printed circuit board, 14a ... Bottom contact 16 ... Elastic member, 17 ... Reinforcing plate

Claims (1)

[Claims] 1. Two printed circuit boards which are vertically opposed to each other and have contacts with each other, a slider which slides on the upper printed circuit board of the two, and the slider on the upper printed circuit board. A slit provided in a direction that is not orthogonal to the sliding direction of the slider, and an upward projection from an opening formed in the lower printed circuit board of the two sheets when the slider presses the upper printed circuit board. An electronic device that has an elastic member that presses an upper printed circuit board in an upward direction, deforms the upper printed circuit board by sliding of the slider, and brings the two printed circuit boards into contact with each other to perform a switching operation. .