JPS5939390Y2 - Thin keyboard switch - Google Patents

Description

[Detailed description of the invention] The present invention relates to a thin keyboard switch, and in particular, when the operator presses the flat key top part of the panel surface with his or her finger to activate a desired switch, the operator feels a clicking tactile sensation. It relates to a structure that ensures reliable attachment.

A conventional thin keyboard switch, as shown in the plan view of FIG. A plurality of upper electrodes 3 are formed from carbon contacts 3a formed by printing or the like and conductive parts 3b made of silver paste or the like.
becomes the key top of the thin keyboard switch.

In addition, a similar lower electrode (not shown) is formed on a similar insulating sheet (not shown) facing the insulating sheet 2, and the insulating sheet is attached to an insulating fixing plate (not shown). The upper electrode 3 and the lower electrode are opposed to each other with a predetermined gap between them by an insulating spacer (not shown) K having a hole, and the upper electrode 3 and the lower electrode are brought into contact by being pressed against the key top. It is common to activate a thin keyboard switch by pressing the button.

Among them, 5 is a lead connected in series to the upper and lower electrodes, and each end of the lead 5 is connected to an external circuit by a suitable connector or the like.

However, with a thin keyboard switch like the one mentioned above,
Since the key top 3 is on the same plane as the panel surface, and the upper electrode and the lower electrode are only opposed to each other with a thin film-like insulating spacer interposed, there is no click feeling when pressing the key top 3. Generally, a separate mechanism was provided to make a sound or emit light when the switch was activated, providing a function that replaced the click sensation.

The purpose of the present invention is to use a mechanical method to reliably provide a click sensation to the operator, rather than expressing the operating sensation of the conventional thin keyboard switch as described above using sound or light.

Hereinafter, one embodiment of the present invention will be described in detail with reference to a cross-sectional side view of main parts shown in FIG. 2A.

Reference numeral 6 denotes a flexible first insulating sheet, 7 an upper electrode formed on the back surface of the first insulating sheet 6, 8 a second insulating sheet, and 9 the upper electrode of the second insulating sheet 8. A lower electrode formed on the surface facing the tenth insulating sheet 6, 10 a first insulating spacer having a hole 10a, 11 a fixing plate 12
a second insulating spacer 13 directly fixed to the fixing plate 1;
2 and the second insulating spacer 11
A dome-shaped plate spring 1a is housed in the interior of the insulating sheet 1a, a protrusion 14 made of an insulating material is fixed to the first insulating sheet 6 with an adhesive or the like, and the tip of the protrusion 14 is attached to the second insulating sheet 8Vc.
It is inserted through the provided hole 8a and comes into elastic contact with the top of the dome of the leaf spring 13. Its operation will be explained using FIG.

Now, in the state shown in FIG. 2A, the first and second insulating sheets 6
．． 8 are opposed to each other with a predetermined gap provided by the first insulating spacer 10, and the upper electrode 7 and lower electrode 9 do not come into contact with each other, and the switch is off.

Next, when the part of the first insulating sheet 6 that is placed on the key top on the panel surface is pressed with a finger or the like, the flexible first insulating sheet 6 bends downward as shown in the opening in FIG.
As a result, the upper electrode γ and the lower electrode 9 come into contact and the switch is turned on, and at the same time, the protrusion 14 presses the dome apex of the leaf spring 13 downward, and the repulsive force of the leaf spring 13 transmits a click sensation to the operator. do.

When the pressure from a finger or the like is released, the plate spring 13 reverses itself due to its elasticity and returns to its original state, and the 6°80 contact between the first and second insulating sheets is released and the switch is turned off. .

The present invention has the above-mentioned configuration, and is said to be able to reliably transmit a click feeling to the operator when the switch is activated, which could not be obtained with conventional thin keyboard switches, and prevent malfunction of the switch. Practical effects are dogs.

Although the plate spring 13 of the present invention is an elastic metal plate,
It may be an insulating material, and in the case of an insulating material, the protrusion 14 may be provided on the top V of the leaf spring 13, either integrally or separately therewith.

Further, the second insulating sheet 8 may be flexible or rigid.

[Brief explanation of drawings]

Figure 1 is a plan view showing a conventional thin keyboard switch.
FIG. 2A is a sectional side view of essential parts showing one embodiment of the present invention. 6.8...Insulating sheet, 7,9...Electrode, 10°11...Insulating spacer, 12...
...Fixing plate, 13...Plate spring, 14...
··protrusion.

Claims (1)

[Scope of utility model registration request] An upper electrode and a lower electrode are respectively formed at corresponding positions on opposing surfaces of first and second insulating sheets that are opposed to each other at a predetermined interval with a first insulating spacer having a hole interposed therebetween, and A second insulating sheet is held on a fixing plate through a second insulating spacer having a hole, and an elastic dome-shaped A plate spring is loaded and a protrusion is fixed to either the first insulating sheet or the plate spring so that the protrusion can freely move within a hole provided in the second insulating sheet, and 1. A thin keyboard switch, characterized in that the insulating sheet of No. 1 is pressed to bring the upper electrode and the lower electrode into contact with each other, and at the same time, the protrusion presses the dome apex of the leaf spring downward.