KR100649487B1 - Seat having capacitance switch - Google Patents

Abstract

Seating according to the present invention, the upper plate (200a) and the lower plate (200b) is made of a combination, the inner surface of the upper plate (200a) side wall 201 is protruded and the side is blocked and the fixing groove is formed in the lower direction is opened; The seating sensor 111 is accommodated in the fixing groove with the packing plate 300 interposed therebetween, and the seating sensor 111 is mounted on the upper plate 200a by the fixing groove cover 400 coupled to the side wall of the fixing groove. Squeezed. The seating sensor 111 may include a capacitive switch including a capacitor and a comparator 1 and a conductive thin film on the substrate 10 to detect a touch of a human body through a change in capacitance due to the approach of the human body ( 11), the upper surface is opened and the case 100, the capacitive switch 11 is accommodated through the upper surface, and the moisture-proof mold for filling the case 100 while entering through the upper surface and covering the capacitive switch 11 110 is made. According to the present invention, not only the seat can be detected by the contact of the human body, but even if the seat is installed on the toilet or outside of the toilet, there is no fear of malfunction due to water droplets or moisture.

Seating sensor, capacitive switch, moisture proof, toilet seat, water drop

Description

Seat having capacitance switch             

1 is a view for explaining a seat according to an embodiment of the present invention;

2 is a view for explaining an example of the seating sensor 111;

3 is a diagram for explaining another example of the seating sensor 111;

4 is a circuit diagram for explaining the capacitive switch 11 of FIGS. 2 and 3;

5 is a view for explaining a capacitive switch according to the present invention manufactured according to the circuit diagram of FIG.

FIG. 6 is a view for explaining a shape in which the seating sensor 111 of FIG. 2 is installed on the upper plate 200a of the seating;

FIG. 7 is a view for explaining a shape in which the seating sensor 111 of FIG. 3 is installed on the upper plate 200a of the seating.

<Description of Reference Numbers for Main Parts of Drawings>

1: capacitive comparator 10: substrate

11: capacitive switch 20: circuit part

30: sensing plate 40: reference plate

100: case 100a: protrusion

100b: shoulder 110: moisture-proof mold

111: seating sensor 111a, 220: power terminal

200: toilet seat 200a: top plate

200b: lower plate 201: fixing groove side wall

210: conductive foil 220: heating wire

290: toilet body 300: packing plate

400: fixing groove cover 500: O-ring

The present invention relates to a seat including a capacitive switch, and more particularly, to a seat to prevent the capacitive switch from malfunctioning due to external moisture or moisture.

Conventionally, seating was detected by sensing the weight of the human body by a mechanical method using a tect switch, but in this case, malfunction occurred a lot due to an increase in the contact resistance of the mechanical part. The present invention has been invented to install a capacitive switch on the seat that can detect seating by sensing a change in capacitance due to the approach of the human body. However, since these capacitive switches utilize electrical characteristics, malfunctions are likely to occur due to moisture or moisture around them.

Therefore, the technical problem to be achieved by the present invention is to provide a seating, in particular, by attaching a capacitive switch to the seat to detect the seating, so that the capacitive switch does not malfunction due to external moisture or moisture.

Seating according to an embodiment of the present invention for achieving the technical problem, the upper plate and the lower plate is made of a combination, the inner surface of the upper plate is formed with a sidewall protruding side wall is blocked and the fixing groove is opened in the lower direction, The seating sensor is accommodated in the fixing groove with a packing plate therebetween, and the seating sensor is pressed onto the upper plate by a fixing groove cover coupled to the side wall of the fixing groove.

The seating sensor may include a capacitive switch including a capacitor and a comparator on a substrate and a conductive thin film to detect a touch of a human body through a change in capacitance caused by the approach of a human body, and an upper surface of the seating sensor to open the upper surface. And a moisture proof mold filling the case while the capacitive switch is accommodated through the top surface and covering the capacitive switch. The bottom surface of the case is in contact with the packing plate. .

It is also necessary to install a plurality of protrusions on the upper surface of the side wall of the case so as to be located in a symmetrical position with respect to the center of the case when viewed from the top, so that the protrusion is in contact with the fixing groove cover.

As the material of the moisture-proof mold, it is preferable to use a non-electrically conductive material having a low dielectric constant. Examples thereof include epoxy, silicone, urethane, and the like. Often, epoxy molding compound (EMC) is widely used.

The coupling of the fixing groove cover and the fixing groove side wall may be made by screwing, or by making a stepped portion or hook-type coupling portion that can be engaged with each other on the end of the fixing groove cover and the outer side of the fixing groove side wall. It may also be achieved through the engagement or coupling of.

Seating according to another embodiment of the present invention for achieving the technical problem, the upper plate and the lower plate is made of a combination, the inner surface of the upper plate is formed with a sidewall protruding side wall is blocked and the fixing groove is opened in the lower direction, The seating sensor is accommodated in the fixing groove,

The seating sensor may include a capacitive switch including a capacitor and a comparator on a substrate, and a conductive thin film configured to sense a touch of a human body through a change in capacitance due to the approach of a human body, and an upper surface of the seating sensor and an upper portion of a side wall. Is bent outward to form a shoulder portion and includes a case in which the capacitive switch is accommodated through the upper surface, and a moisture proof mold that enters through the upper surface and covers the capacitive switch to fill the case.

The shoulder portion is coupled to the side wall of the fixing groove in the state that the O-ring is interposed between the shoulder portion and the side wall of the fixing groove is characterized in that the seating sensor is pressed onto the top plate.

A packing plate may be further provided between the case and the top plate, and it is preferable to use a conductive elastic body such as conductive silicone or conductive rubber as the packing plate. A conductive gasket may be used as the packing plate.

 In each of the above examples, the upper plate and the lower plate may be combined by ultrasonic fusion. At this time, the upper plate and the lower plate may be formed so as to coincide with each other while forming a finger-like protrusion to ultrasonically fusion this portion.

In each of the above examples, a conductive foil including a heating wire may be installed on an inner surface of the upper plate, in which case the conductive foil should be installed to be spaced apart from the seating sensor by a predetermined distance.

Seating according to another embodiment of the present invention for achieving the technical problem, the top plate and the bottom plate is made of a combination, the seating sensor is bonded to the inner surface of the top plate by an adhesive,

The seating sensor may include a capacitive switch including a capacitor and a comparator on a substrate and a conductive thin film to detect a touch of a human body through a change in capacitance caused by the approach of a human body, and an upper surface of the seating sensor to open the upper surface. And a moisture proof mold filling the case while the capacitive switch is accommodated therein and covering the capacitive switch through the upper surface, wherein the bottom surface of the case is adhered to the upper plate by an adhesive. It features.

 Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. The following embodiments are only presented to understand the content of the present invention, and those skilled in the art may make many modifications within the technical spirit of the present invention. Therefore, the scope of the present invention should not be interpreted as being limited to these embodiments.

1 is a view for explaining a seat according to an embodiment of the present invention, taking a toilet seat as an example. Referring to Figure 1 (a), the toilet body 290 is covered by a toilet seat 200, the toilet seat 200 is made by combining the upper plate 200a and the lower plate 200b. These couplings can be made by ultrasonic fusion, which is important to prevent water from seeping inside. To this end, as shown in FIG. 1 (b), it is preferable to make a projection of the shape of a finger to be coincident with the upper plate 200a and the lower plate 200b so that the portion is ultrasonically fused.

The heating wire 220 is installed on the inner surface of the upper plate 200a so that the seated person does not feel cold in winter, such as aluminum between the upper plate 200a and the heating wire 200 so that the heat by the heating wire 200 is evenly transmitted to the seat. The conductive foil 210 is installed. In FIG. 1A, the conductive foil 210 is positioned between two dotted lines. Since the conductive foil 210 is a conductor, the seating sensor 111 may malfunction when contacted with the seating sensor 111. The seating sensor 111 and the conductive foil 210 should be spaced apart from each other by a predetermined distance.

Reference numeral 111a is a power terminal of the seating sensor 111, 220a is a power terminal of the heating wire 200.

2 is a view for explaining an example of the seating sensor 111. Referring to FIG. 2A, the seating sensor 111 includes a capacitive switch 11, a case 100 in which an upper surface thereof is opened, and a capacitance switch 11 is received through the upper surface thereof. It includes a moisture-proof mold 110 to enter through and fill the case 100 while covering the capacitive switch (11). The moisture proof mold 110 is intended to prevent water from penetrating into the capacitive switch 11, and it is preferable to use a material having low conductivity and low dielectric constant. Examples thereof include epoxy, silicon, urethane, and the like. Often, epoxy molding compound (EMC) is widely used.

In some cases, as shown in (b) of FIG. 2, a plurality of protrusions 100a are disposed on the upper surface of the side wall of the case 100 such that the case 100 is symmetrical with respect to the center of the case 100 when viewed from above. ) Can also be installed. (C) of FIG. 2 is a top view of (b).

When the center portion of the moisture proof mold 110 protrudes convexly, it becomes higher than the side wall of the case 100. Then, as shown in FIG. 6A, when the case 100 is pressed by the fixing groove cover 400, the side wall of the case 100 is not pressed by the cover 400, but the moisture proof mold 110 is pressed. 100) Crimping is not done properly. Therefore, in order to prevent this, to provide a protrusion (100a) to make it contact the cover 400.

3 is a view for explaining another example of the seating sensor 111, (a) is a cross-sectional view, (b) is a plan view. Unlike FIG. 2, the upper part of the side wall of the case 100 is bent outward to form a shoulder portion 100b, and the shoulder portion 100b is provided with a screw hole N through which a screw can pass.

4 is a circuit diagram illustrating the capacitive switch 11 of FIGS. 2 and 3. Referring to FIG. 4, a first reference capacitor Cms and a first sensing variable capacitor Cps connected in parallel are connected to an inverting terminal of the capacitance comparator 1, and a second reference capacitor connected in parallel to a non-inverting terminal. (Cmr) and the second sensing variable capacitor (Cpr) is connected.

Accordingly, the sum of capacitances of the first reference capacitor Cms and the first sensing variable capacitor Cps is input to the inverting terminal, and the second reference capacitor Cmr and the second sensing variable capacitor are input to the non-inverting terminal. The capacitance sum of Cpr is input. The capacitance comparator 1 compares the capacitance values input to the inverting terminal and the non-inverting terminal with each other and outputs different signals depending on which terminal has a larger value.

The other terminals of the first reference capacitor Cms and the second reference capacitor Cmr, which are not connected to the comparator 1, are grounded, and the first sensing variable capacitor Cps and the first terminal that are not connected to the comparator 1 are grounded. The other terminals A and B of the two-sensing variable capacitor Cpr are floated. When the human body approaches the floating terminals A and B, the first sensing variable capacitor Cps and the second sensing variable capacitor Cpr are floated. ) Increases the capacitance.

The second reference capacitor Cmr has a larger capacitance than the first reference capacitor Cms, and as the human body approaches the floating terminals A and B, the increase in capacitance of the first sensing variable capacitor Cps is zero. When it is larger than the two sensing variable capacitor Cpr, when the human body approaches the floating terminals A and B, the capacitance initially inputted to the non-inverting terminal is larger than that input to the inverting terminal. At some point, the capacitance input to the inverting terminal becomes larger than the capacitance input to the non-inverting terminal so that the comparator 1 causes a change in output.

5 is a view for explaining a capacitance switch according to the present invention manufactured according to the circuit diagram of Figure 4, (a) is a cross-sectional view, (b) is a plan view. Referring to FIG. 5, a circuit portion 20 is provided on an upper surface of the dielectric substrate 10, and the circuit portion 20 is more than the capacitance comparator 1, the first reference capacitor Cms, and the first reference capacitor. A second reference capacitor Cmr having a large capacitance is included.

The sensing plate 30 is installed on the upper and lower surfaces of the substrate 10, and the reference plate 40 is installed only on the upper surface of the substrate 10. The sensing plates 30 provided on the upper and lower surfaces of the substrate 10 are electrically connected to each other through via holes formed in the substrate 10, and any one of the sensing plates 30 provided on the upper and lower surfaces of the substrate 10 may be the first. It is electrically connected to the reference capacitor Cps. The bottom surface of the substrate 10 has a larger area than the top surface. The sensing plate 30 provided on the upper and lower surfaces of the substrate 10 is preferably the same material, but even if the diarrhea material is different, it does not matter much if it is a conductor.

The reference plate 40 is installed on the upper surface of the substrate 10 to be connected to the second reference capacitor Cmr. The reference plate 40 and the sensing plate 30 installed on the upper surface of the substrate 10 have the same area. It is preferable to have it, and even if it is not the same, it is desirable to make the area difference minimum.

The first sensing variable capacitor Cps is formed between the sensing plate 30 and the human body, and the second sensing variable capacitor Cpr is formed between the reference plate 40 and the human body.

When the human body contacts the lower surface of the substrate 10, the sensing plate 30 on the lower surface of the substrate 10 is closer to the human body than the reference plate 40, and a dielectric substrate is disposed between the reference plate 40 and the human body. In addition to the pinch (10), the area of the sensing plate 30 is larger than the reference plate 40, so that the capacitance of the first sensing variable capacitor (Cps) is the electrostatic of the second sensing variable capacitor (Cpr) Increases faster than capacity. Therefore, the capacitance input to the inverting terminal of the comparator 1 at the moment of contact becomes larger than that input to the non-inverting terminal so that the switch operates.

If there is no sensing plate 30 on the upper surface of the substrate 10, even when the human body is in contact with the lower surface of the substrate 10, the water droplets contact the upper surface of the substrate 10. The increase in the two-sensing variable capacitor (Cpr) may have a large effect and the switch may not operate. This phenomenon occurs not only by the presence of water droplets but also by the presence of moisture-proof mold 110 or the presence of moisture.

In order to prevent this, if the sensing plate 30 having an area similar to that of the reference plate 40 is also installed on the top surface of the substrate 10 for auxiliary purposes, when water droplets are present on the top surface of the substrate 10, An increase in capacitance occurs, but an increase in capacitance caused by the sensing plate 30 on the upper surface of the substrate 10 also occurs, so that they cancel each other and prevent a malfunction of the switch.

FIG. 6 is a view for explaining the shape in which the seating sensor 111 of FIG. 2 is installed on the upper plate 200a of the seat, where (a) is a sectional view and (b) is a bottom view. On the inner surface of the upper plate (200a) is a side wall 201 is protruded, the side direction is blocked and the fixing groove is formed in the lower direction, the seating sensor 111 is accommodated in the fixing groove. The bottom surface of the case 100 of the seating sensor faces the upper plate 200a, and a packing plate 300 made of conductive silicon is installed between the case 100 and the upper plate 200a.

The fixing groove cover 400 is coupled to the side wall 201 of the fixing groove by a screw B. As the screw B is tightened, the case 100 is properly pressed onto the upper plate 200a. In this way, there is no fear that water droplets may flow between the bottom surface of the case 100 and the upper plate 200.

The coupling of the fixing groove cover 400 and the fixing groove side wall 201 is not limited to screwing, and may be by any other known coupling method if the case 100 can be pressed onto the upper plate 200a. For example, the upper part of the case 100 is formed by engaging or engaging the end portion of the fixing groove cover 400 and the stepped portion or the hook-type coupling portion which can be engaged with each other on the outside of the fixing groove side wall 201. ) Can also be pressed.

The fixing groove side wall 201 is for fixing the case 100, and the packing plate 300 is for preventing the water droplets from penetrating into the contact portion between the case 100 and the top plate 200a, instead of the packing plate 300 When the case 100 is completely adhered to the upper plate 200a using an adhesive, the side wall 201 is not only prevented from infiltrating water droplets between the case 100 and the upper plate 200a and the case 100 is fixed. Without this, the object of the present invention is sufficiently achieved.

FIG. 7 is a view for explaining the shape in which the seating sensor 111 of FIG. 3 is installed on the upper plate 200a of the seat, where (a) is a sectional view and (b) is a bottom view.

As the O-ring 500 is interposed between the shoulder part 100b of the case and the side wall 201 of the fixing groove, the shoulder part 100b and the fixing groove side wall 201 are coupled by the screw B, thereby allowing the seating sensor ( 111 is pressed onto the top plate 200a. The o-ring 500 is intended to prevent moisture from penetrating. Of course, it is better if the packing plate 300 is installed between the bottom surface of the case 100 and the upper plate (200a).

As described above, according to the present invention, not only the seat can be detected by the contact of the human body, but even if the seat is installed on the toilet or outside of the toilet, there is no fear of malfunction due to water droplets or moisture.

Claims (13)

The upper plate and the lower plate is made of a combination, a heating wire is installed between the upper plate and the lower plate, a conductive foil is installed between the heating wire and the upper plate, the side wall is protruded side of the inner surface of the upper plate is not installed A blocking groove is formed in the lower direction, and an opening fixing groove is formed in the lower direction, and a seating sensor is accommodated in the fixing groove with a packing plate therebetween, and the landing sensor is attached to the upper plate by a fixing groove cover coupled to the side wall of the fixing groove. Squeezed, The seating sensor may include a capacitive switch including a capacitor and a comparator on a substrate and a conductive thin film to detect a touch of a human body through a change in capacitance caused by the approach of a human body, and an upper surface of the seating sensor to open the upper surface. And a moisture proof mold filling the case while the capacitive switch is accommodated through the top surface and covering the capacitive switch. The bottom surface of the case is in contact with the packing plate. Seating. The method of claim 1, wherein a plurality of protrusions are provided on the upper surface of the side wall of the case so as to be symmetrical with respect to the center of the case when viewed from the top, the protrusion is in contact with the fixing groove cover Seating. The seating according to claim 1, wherein the moisture proof mold is made of epoxy, silicone, urethane, or EMC. The seating as claimed in claim 1, wherein the packing plate is made of a conductive elastic body. The seating as claimed in claim 1, wherein the packing plate is a conductive gasket. The upper plate and the lower plate is made of a combination, a heating wire is installed between the upper plate and the lower plate, a conductive wire foil is installed between the heating wire and the upper plate, the side wall is protruded in the portion of the upper surface of the conductive plate is not installed. A lateral direction is blocked and a downward direction is formed with an open fixing groove, the seating sensor is accommodated in the fixing groove, The seating sensor may include a capacitive switch including a capacitor and a comparator on a substrate, and a conductive thin film configured to sense a touch of a human body through a change in capacitance due to the approach of a human body, and an upper surface of the seating sensor and an upper portion of a side wall. Is bent outward to form a shoulder portion and includes a case in which the capacitive switch is accommodated through the upper surface, and a moisture proof mold that enters through the upper surface and covers the capacitive switch to fill the case. And the shoulder part is coupled to the fixing groove side wall with an O-ring interposed between the shoulder portion and the side wall of the fixing groove so that the seating sensor is pressed onto the upper plate. The seat according to claim 6, wherein a packing plate is further provided between the case and the top plate. 8. The seating according to claim 7, wherein the packing plate is made of a conductive elastic body. 8. The seating as claimed in claim 7, wherein said packing plate is a conductive gasket. The seating according to claim 1 or 6, wherein the upper plate and the lower plate are joined by ultrasonic welding. The seating according to claim 10, wherein the upper plate and the lower plate have finger-shaped protrusions that are displaced and coincide with each other, and the portion is ultrasonically fused. delete The upper plate and the lower plate are combined, and a heating wire is installed between the upper plate and the lower plate, and a conductive foil is installed between the heating wire and the upper plate, and a seating sensor is attached to an adhesive on a portion of the inner surface of the upper plate where the conductive foil is not installed. Bonded by The seating sensor may include a capacitive switch including a capacitor and a comparator on a substrate and a conductive thin film to detect a touch of a human body through a change in capacitance caused by the approach of a human body, and an upper surface of the seating sensor to open the upper surface. And a moisture proof mold filling the case while the capacitive switch is accommodated therein and covering the capacitive switch through the upper surface, wherein the bottom surface of the case is adhered to the upper plate by an adhesive. Seating characterized.

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