TWI678653B - Electronic device with touch function and touch module thereof - Google Patents

Abstract

The invention is an electronic device with a touch function and a touch module thereof. The electronic device has a housing and the touch module. The touch module includes a shielding unit and a circuit board. The shielding unit is arranged in the housing. The fixed potential is connected. The circuit board is arranged between the operating surface of the housing and the shielding unit. The floating touch sensing electrode on the circuit board and the coupling capacitance formed when the user's finger contacts the operating surface are used to replace the entity. The function of pressing a key and triggering a specific command, and by setting the shielding unit, to prevent a finger from being accidentally touched on the side other than the operation surface to form a coupling capacitor, so as to avoid the action caused by the touch.

Description

Electronic device with touch function and touch module thereof

The invention relates to an electronic device, which refers to an electronic device with a touch function.

The electronic device must be equipped with a control panel to allow users to control its functions. Traditional electronic devices, especially home appliances, are used as examples. The control panel uses physical buttons. When the user presses the physical button, the physical button moves down. And the internal metal circuit is linked to conduct the circuit on the circuit board, and then perform corresponding command manipulation. When the user releases the physical button, the reset mechanism provided on the physical button forces it to move back to the original position for the next pressing.

However, after the physical button is pressed repeatedly for a long time, the reset mechanism will gradually accumulate fatigue due to repeated stress. When the fatigue strength is exceeded, the reset mechanism will not be able to reset, and the physical button will fail and cannot be used. At this time, you must replace the physical buttons or even the overall control panel to continue using the electronic device.

In view of this, the present invention improves the disadvantages of the traditional electronic device using a physical button as a control panel, so as to extend the service life of the control panel and reduce the probability of maintenance.

Another technical means of the present invention is to provide a touch module comprising: a shielding unit electrically connected to a fixed potential; a circuit board provided with a plurality of floating touch sensing electrodes, the shielding unit and the floating touch The sensing electrodes are insulated from each other; and a first insulating medium, the circuit board is located between the shielding unit and the first insulating medium.

In order to achieve the above-mentioned object of the present invention, the technical means adopted by the present invention is to provide an electronic device with a touch function, which includes: a housing having an accommodating space inside and an operating surface outside; a shielding unit It is electrically connected to a fixed potential; a circuit board is disposed in the housing space of the casing and is located between the operation surface of the casing and the shielding unit, and the circuit board is provided with several floating contacts corresponding to the operation surface. A sensing electrode, a first insulating medium is provided between the floating touch sensing electrode and the operating surface of the casing, and the shielding unit and the floating touch sensing electrode are insulated from each other.

An advantage of the present invention is that a floating touch sensing electrode on a circuit board is used to form a coupling capacitor with a finger of a user of the touch panel. The circuit board receives the change in capacitance to determine the location of the user's contact, and then learns what the user wants to press What are the keys? Then, the corresponding command control is performed. Furthermore, in order to prevent the user from forming a coupling capacitor when the opposite surface of the operation surface is accidentally touched, the invention also sets the circuit board between the operation surface and the shielding unit to prevent use. Coupling capacitance is generated when the user touches the opposite side of the operation surface by mistake, thereby preventing the situation of misoperation.

In the following, with reference to the drawings and the embodiments of the present invention, the technical means adopted by the present invention to achieve the intended purpose of the present invention will be further explained.

Please refer to FIG. 1, the electronic device of the present invention includes a casing 10 and the touch module of the present invention. The touch module of the present invention includes a shielding unit 20 and a circuit board 30.

The aforementioned casing 10 may be a casing of various electronic devices, such as household appliances such as an induction cooker and a stereo, but is not limited thereto. The housing 10 has an accommodation space 11 inside, and an operation surface 12 is provided on the outside of the housing 10. The operation surface 12 is provided with a button position indication for the user to trigger corresponding when touching each preset position. Instructions.

The aforementioned shielding unit 20 is electrically connected to a fixed potential setting.

The aforementioned circuit board 30 is disposed in the accommodating space 11, and the circuit board 30 is located between the operation surface 12 and the shielding unit 20. Please refer to FIG. 1. In one embodiment, the upper surface 301 of the circuit board 30 is opposite to the operation surface 12, and the shielding unit 20 is disposed on the lower surface 302 of the circuit board 30; please refer to FIG. 2. In another embodiment, the shielding unit 20 is disposed in the accommodating space 11 or may be attached to the inner wall surface of the casing 10.

The circuit board 30 is provided with a plurality of floating touch-sensing electrodes 31. The floating touch-sensing electrodes 31 correspond to the positions of the keys on the operation surface 12 described above. When the user touches each of the preset positions, the corresponding The floating touch sensing electrode 31 forms a coupling capacitor, and triggers a command corresponding to the floating touch sensing electrode 31. Please refer to FIG. 3 and FIG. 4, a coupling capacitance is formed between the floating touch sensing electrode 31 and the operation surface 12 when the user's finger 40 touches, and the shielding unit 20 controls the floating touch sensing electrode 31. A blocking capacitor is formed between the second side and the other side, and if the finger 40 of the user contacts the non-operation surface (as shown in FIG. 5), the blocking of the shielding unit 20 will prevent the floating touch sensing electrode 31 from operating. Coupling capacitors are formed on contacts other than the surface 12 to prevent accidental contact.

The shielding unit 20 and the floating touch sensing electrodes 31 of the circuit board 30 are insulated from each other.

In an embodiment, please refer to FIG. 6, the shielding unit is a wire 20A, and an insulating coating is provided on the surface of the wire 20A, so that the wire 20A and the floating touch sensing electrode 31 of the circuit board 30 They are insulated from each other, and the ends of the wires 20A are soldered to the fixed potential 32A of the circuit board 30.

In another embodiment, please refer to FIG. 7, the shielding unit is a copper foil 20B, and the copper foil 20B can be attached to the circuit board 30 through an insulating coating (not shown) on the surface of the circuit board 30. (Illustrated), the copper foil 20B and the floating touch sensing electrode 31 of the circuit board 30 are insulated from each other, and an end portion of the copper foil 20B is soldered to a fixed potential 32B of the circuit board 30.

In another embodiment, please refer to FIG. 2, the shielding unit 20 is attached to the inner wall surface of the casing 10, and there is a first gap 101 between the shielding unit 20 and the circuit board 30. The air between the shielding unit 20 and the circuit board 30 is plugged in the first gap 101 by an air or an insulating substance, so that the floating touch of the shielding unit 20 and the circuit board 30 is touched. The sensing electrodes 31 are insulated from each other.

There is a first insulating medium between the floating touch sensing electrode 31 and the operation surface 12. In an embodiment, the circuit board 20 and the operation surface 12 have a second gap 102. Then, the circuit board 30 and the operation surface 12 are insulated by air or an insulation located in the second gap 102. A substance is inserted into the second gap 102, so that the floating touch sensing electrode 31 and the operation surface 12 are insulated from each other.

In one embodiment, the circuit board 30 may be a single-layer circuit board.

Therefore, by setting the floating touch sensing electrode 31, the user can achieve the function of triggering a preset command by changing the coupling capacitance formed between the finger and the floating touch sensing electrode 31, such as turning on an electronic device, Functions such as turning off the electronic device, adjusting the firepower, adjusting the volume, etc., and preventing the coupling capacitor from being formed on the side surface other than the operation surface 12 through the setting of the shielding unit 20, to avoid the phenomenon of accidental operation.

The above description is only an embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed by the embodiments as above, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field of the art, Within the scope not departing from the technical solution of the present invention, when the above disclosed technical content can be used to make a few changes or modifications to equivalent equivalent embodiments, as long as it does not depart from the technical solution of the present invention, it is in accordance with the technical essence of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

10‧‧‧shell

11‧‧‧ accommodation space

12‧‧‧Control surface

101‧‧‧ the first gap

102‧‧‧Second Gap

20‧‧‧Shading Unit

20A‧‧‧Wire

20B‧‧‧ Copper foil

30‧‧‧Circuit Board

301‧‧‧upper surface

302‧‧‧ lower surface

31‧‧‧ floating touch sensing electrode

32A, 32B‧‧‧Fixed potential

40‧‧‧finger

FIG. 1 is a schematic side sectional view of the present invention. FIG. 2 is a schematic side sectional view of another embodiment of the present invention. FIG. 3 is a schematic diagram of forming a coupling capacitor according to the present invention. FIG. 4 is a schematic diagram of forming a coupling capacitor according to another embodiment of the present invention. FIG. 5 is a schematic diagram of a user touching a non-operation surface by mistake. FIG. 6 is a schematic diagram of a shielding unit as a wire. FIG. 7 is a schematic diagram of a shielding unit made of copper foil.

Claims (11)

A touch module includes: a shielding unit electrically connected to a fixed potential; a circuit board provided with a plurality of floating touch sensing electrodes; and a first insulating medium, the circuit board is located between the shielding unit and the shielding unit. Between a first insulating medium; a first gap between the shielding unit and the circuit board; a second insulating medium disposed in the first gap so that the shielding unit and the floating touch sensing The electrodes are insulated from each other. The touch module according to claim 1, wherein the shielding unit is a wire, and an insulating coating is provided on a surface of the wire to insulate the shielding unit and the floating touch sensing electrode from each other. The touch module according to claim 1, wherein the shielding unit is a copper foil. The touch module according to claim 3, wherein the copper foil is attached to the circuit board, and an insulating coating on a surface of the circuit board insulates the copper foil and the floating touch sensing electrode from each other. The touch module according to claim 1, wherein the second insulating medium is air or an insulating substance located in the first gap and is inserted in the first gap. The touch module according to claim 1, wherein the first insulating medium is air or an insulating substance. The touch module according to claim 1, wherein the circuit board is a single-layer circuit board. An electronic device with a touch function includes: a housing having an accommodating space inside and an operating surface on the outside; a shielding unit electrically connected to a fixed potential; and a circuit board disposed on the housing. The accommodating space of the casing is located between the operation surface of the casing and the shielding unit. The circuit board is provided with a plurality of floating touch sensing electrodes corresponding to the operation surface. The floating touch sensing electrodes are operated with the casing. There is a first insulating medium between the surfaces: a first gap is located between the shielding unit and the circuit board; a second insulating medium is disposed in the first gap so that the shielding unit and the suspension are suspended The touch sensing electrodes are insulated from each other. The electronic device with a touch function according to claim 8, wherein the shielding unit is a copper foil, and the copper foil is disposed in the accommodation space of the casing. The electronic device with a touch function according to claim 9, wherein the second insulating medium is air or an insulating substance located in the first gap and is inserted in the first gap. The electronic device with touch function according to claim 8, wherein the circuit board and the operating surface of the casing have a second gap, and the first insulating medium is air or a An insulating substance is plugged in the second gap.