KR102251234B1 - Force sensor switch with increased stroke distance - Google Patents

Abstract

The present invention relates to a force sensor switch with an increased stroke distance, and in particular, a second electrode part is formed under the base part, and a first electrode part is formed at an interval on both sides of the upper part of the base part of the second electrode part, and the first electrode is extended. The moving distance (stroke distance) of the extension of the first electrode is increased by attaching the part to the second electrode part and the upper part of the first electrode part at an interval and changing the capacitance with the second electrode part by changing according to the touch pressure. It relates to a force sensor switch with increased stroke distance.

Description

Force sensor switch with increased stroke distance {FORCE SENSOR SWITCH WITH INCREASED STROKE DISTANCE}

The present invention relates to a force sensor switch with an increased stroke distance, and in particular, a second electrode part is formed under the base part, and a first electrode part is formed at an interval on both sides of the upper part of the base part of the second electrode part, and the first electrode is extended. The moving distance (stroke distance) of the extension of the first electrode is increased by mounting the part to the second electrode part and the upper part of the first electrode part at an interval and changing it according to the touch pressure to change the capacitance with the second electrode part. It relates to a force sensor switch with increased stroke distance.

In general, the capacitive force sensor is applied to measure a static or dynamic pressure by detecting a change in capacitance that is varied by pressure, or to generate a switching signal having a continuous change.

Capacitive force sensors are applied to electronic devices with force touch functions, pressure sensitive touch panels, automotive touch buttons, and metal touch panel switches. It is operated to change and sense the changed capacitance to output a pressure signal or a switching signal.

In Korean patent application 2018-0087426, a force sensor switch having a double elastic body structure is disclosed. The force sensor switch with the double elastic body structure measures the pressure by the first electrode extension electrode in one step when the user presses it, and measures the pressure by the elasticity of the elastic body in two steps when the first extension electrode part contacts the elastic body. Therefore, it is possible to measure fine pressure and also has an excellent effect that the pressure measurement range can be increased.

However, since the moving distance (stroke distance) of the first electrode extension electrode portion is shortened by the elastic body, there is a problem that the pressure measurement range is reduced.

Domestic patent application 2018-0087426 (filing date: July 26, 2018)

Accordingly, the present invention is to solve the problems of the prior art described above, and the stroke distance is increased, which can increase the pressure measurement range while preventing an infinite sudden increase in pressure due to contact of the first electrode part and the second electrode part. It is an object to provide a force sensor switch.

In order to achieve the above object, a force sensor switch having an increased stroke distance according to an embodiment of the present invention includes a base portion; A second electrode part formed under the base part; First electrode portions formed at intervals on both upper sides of the base portion of the second electrode portion side; A first electrode that is disposed above the second electrode part and the first electrode part at an interval, has both ends electrically connected to the first electrode part, and is variable according to a touch pressure to change the capacitance with the second electrode part. An electrode extension electrode portion; An accommodating portion accommodating the first electrode extension electrode portion; A cover portion covering an upper portion of the receiving portion; And a pressing unit installed between the first electrode expansion electrode unit and the cover unit to press the upper center of the first electrode expansion electrode unit when a user's touch pressure is applied.

In the force sensor switch with an increased stroke distance according to the embodiment, the first electrode extended electrode portion may have a dome shape when viewed in a cross-sectional view.

In the force sensor switch with an increased stroke distance according to the embodiment, the first electrode extended electrode portion may have a "┏-┓" shape when viewed in a cross-sectional view.

In the force sensor switch with an increased stroke distance according to the embodiment, the first electrode extended electrode portion may be made of stainless steel (SUS).

In the force sensor switch with an increased stroke distance according to the above embodiment, the cover portion may be made of a polyimide film.

In the force sensor switch with an increased stroke distance according to the embodiment, the second electrode portion may be configured in a self-key electrostatic method, and the first electrode portion may be a ground electrode.

According to the force sensor switch having an increased stroke distance according to an embodiment of the present invention, the base portion; A second electrode part formed under the base part; First electrode portions formed at intervals on both upper sides of the base portion of the second electrode portion side; A first electrode that is disposed above the second electrode part and the first electrode part at an interval, has both ends electrically connected to the first electrode part, and is variable according to a touch pressure to change the capacitance with the second electrode part. An electrode extension electrode portion; An accommodating portion accommodating the first electrode extension electrode portion; A cover portion covering an upper portion of the receiving portion; And a pressing unit installed between the first electrode expansion electrode unit and the cover unit to press the upper center of the first electrode expansion electrode unit when a user's touch pressure is applied. There is an excellent effect that the pressure measurement range can be increased as well as preventing an infinite sudden increase in pressure due to contact with the electrode.

That is, since the first electrode extension portion and the second electrode portion are interposed between the base portion and thus do not contact each other, an infinite rapid increase in pressure due to the contact between the first electrode portion and the second electrode portion can be prevented. Since it has a configuration that can increase the moving distance (stroke distance) of the electrode extension, it has an excellent effect that it can increase the pressure measurement range.

1 is an external perspective view of a force sensor switch with an increased stroke distance according to an embodiment of the present invention.
FIG. 2 is an AA cross-sectional view of FIG. 1.
FIG. 3 is a cross-sectional view of a case in which the first electrode extension electrode part in FIG. 2 is replaced to have a ┏━┓" shape when viewed in a cross-sectional view.

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

1 is an external perspective view of a force sensor switch with an increased stroke distance according to an embodiment of the present invention, FIG. 2 is an AA cross-sectional view of FIG. 1, and FIG. 3 is a cross-sectional view of a first electrode extended electrode part in FIG. 2 It is a cross-sectional view when replaced to have a ┏━┓" shape.

The force sensor switch having an increased stroke distance according to an embodiment of the present invention includes a base portion 100, a second electrode portion 130, and a first electrode portion 120, 120, as shown in FIGS. 1 to 3. ), a first electrode extension electrode unit 150 or 150', a receiving unit 110, a cover unit 170, and a pressing unit 160.

The base unit 100 is a substrate on which a circuit pattern for outputting a capacitance signal of the force sensor switch of the present invention is formed, and may be manufactured in various forms such as FPCB, PCB, and injection molding.

The second electrode unit 130 and the first electrode unit 120 constitute a capacitance unit, and are used for controlling volume, brightness, and channel change according to the pressure applied to the first electrode expansion electrode unit 150 or 150 ′. It is configured to output a variable capacitance value.

The second electrode part 130 is patterned under the base part 100 and causes a change in capacitance according to a distance from the first electrode extension electrode part 150 or 150 ′. The second electrode unit 130 is formed by being exposed to an external electrode so as to be electrically connected to the wiring of the base unit 100.

The first electrode parts 120 and 120 are patterned at both sides of the base part 100 on the side of the second electrode part 130 at intervals, and a first electrode is extended on the upper part of the first electrode part 120 and 120 Both ends of the electrode unit 150 or 150' are electrically connected, respectively. The first electrode portions 120 and 120 are formed by being exposed as external electrodes to be electrically connected to external components or devices such as wiring of the base portion 100.

The first electrode extension electrode unit 150 or 150 ′ is disposed above the second electrode unit 130 and the first electrode unit 120 and 120 at intervals, and both ends of the first electrode unit 120 and 120 are disposed above the second electrode unit 130 and the first electrode unit 120 and 120. Each of and are electrically connected, and may be configured as a structure 150 ′ having a dome shape as shown in FIG. 2 or a structure 150 ′ having a “┏-┓” shape when viewed in a cross-sectional view as shown in FIG. 3. The first electrode extension electrode unit 150 or 150 ′ is varied according to the user's touch pressure to change the capacitance with the second electrode unit 130.

In a more detailed description of the operation of the first electrode extended electrode units 150 and 150 ′ with the second electrode unit 130, the first electrode extended units 150 and 150 ′ and the second electrode unit 130 ) Is interposed between the base part 100 so that they do not come into contact with each other, it is possible to prevent an infinite sudden increase in pressure due to the contact between the first electrode parts 120 and 120 and the second electrode part 130, and the first electrode Since the moving distance (stroke distance) of the extension parts 150 and 150 ′ can be increased, the range of change in capacitance with the second electrode unit 130 can be increased, and accordingly, the pressure measurement range can be increased.

The accommodating portion 110 accommodates the first and extended electrode portions 150 and 150, and the cover portion 170 covers the upper portion thereof.

The cover part 170 covers the upper part of the receiving part 110 and has a convex upward shape, and a pressing part 160 is mounted between the first electrode extension electrode parts 150 and 150 ′ in the lower central part. . The cover 170 is made of, for example, a polyimide film.

The pressing unit 160 is installed between the first electrode expansion electrode units 150 and 150 ′ and the cover unit 170 to move the upper center of the first electrode expansion electrode unit 150 and 150 ′ when a user's touch pressure is applied. It serves to pressurize.

According to the force sensor switch having an increased stroke distance according to an embodiment of the present invention configured as described above, the base portion; A second electrode part formed under the base part; First electrode portions formed at intervals on both upper sides of the base portion of the second electrode portion side; A first electrode that is disposed above the second electrode part and the first electrode part at an interval, has both ends electrically connected to the first electrode part, and is variable according to a touch pressure to change the capacitance with the second electrode part. An electrode extension electrode portion; An accommodating portion accommodating the first electrode extension electrode portion; A cover portion covering an upper portion of the receiving portion; And a pressing unit installed between the first electrode expansion electrode unit and the cover unit to press the upper center of the first electrode expansion electrode unit when a user's touch pressure is applied. There is an excellent effect that the pressure measurement range can be increased as well as preventing an infinite sudden increase in pressure due to contact with the electrode.

That is, since the first electrode extension portion and the second electrode portion are interposed between the base portion and thus do not contact each other, an infinite rapid increase in pressure due to the contact between the first electrode portion and the second electrode portion can be prevented. Since it has a configuration that can increase the moving distance (stroke distance) of the electrode extension, it has an excellent effect that it can increase the pressure measurement range.

In the drawings and specification, an optimal embodiment has been disclosed, and specific terms are used, but these are used only for the purpose of describing the embodiments of the present invention, and are used to limit the meaning or the scope of the present invention described in the claims. Was not done. Therefore, those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

100: base portion
110: receiving part
120: first electrode unit
130: second electrode unit
150, 150': first electrode extension electrode part
160: pressurization unit
170: cover

Claims (6)

A base portion 100;
A second electrode part 130 formed under the base part;
First electrode portions 120 and 120 formed at intervals on both upper sides of the base portion of the second electrode portion side;
A first electrode that is disposed above the second electrode part and the first electrode part at an interval, has both ends electrically connected to the first electrode part, and is variable according to a touch pressure to change the capacitance with the second electrode part. An electrode extension electrode unit 150;
An accommodating part 110 accommodating the first electrode extension electrode part;
A cover portion 170 covering an upper portion of the receiving portion; And
A pressing unit 160 installed between the first electrode expansion electrode unit and the cover unit to press the upper center of the first electrode expansion electrode unit when a user's touch pressure is applied, and
A force sensor switch having an increased stroke distance, wherein the first electrode extended electrode portion and the second electrode portion are interposed between the base portion and thus do not contact each other.
The method of claim 1,
The force sensor switch having an increased stroke distance, wherein the first electrode extended electrode portion has a dome shape as viewed in a cross-sectional view.
The method of claim 1,
The force sensor switch having an increased stroke distance, wherein the first electrode extended electrode part has a "┏━┓" shape when viewed in a cross-sectional view.
The method of claim 1,
The first electrode extended electrode portion is made of stainless steel (SUS), a force sensor switch with an increased stroke distance.
The method of claim 1,
The cover part 170 is made of a polyimide film, a force sensor switch with an increased stroke distance.
The method of claim 1,
The second electrode unit 130 is configured in a self-key electrostatic method,
The first electrode portions 120 and 120 are ground electrodes, a force sensor switch having an increased stroke distance.

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