TW202018476A - Electronic device with touch function and touch module thereof - Google Patents

Abstract

The present 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 disposed in the housing and connects to a constant voltage. The circuit board is disposed between an operation surface of the casing and the shielding unit. The function of the physical button and triggering a specific command is achieved by the coupling capacitance formed between the floating touch sensing electrodes on the circuit board and the user's finger contacting with the operating surface. The shielding unit prevents the finger contacting on the side surfaces other than the operation surface from accidentally forming a coupling capacitor so that the false command due to the accidental touch is avoided.

Description

Electronic device with touch function and touch module

The invention is 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 the user to control its functions. Traditional electronic devices, especially household electrical appliances, take the physical panel as an example. When the user presses the physical button, the physical button moves down And connect the internal metal circuit to turn on the circuit on the circuit board, and then carry out the corresponding command control. When the user releases the physical key, the reset mechanism provided on the physical key forces it to move back to its original position, to be pressed next time.

However, after the physical key is pressed for many times over a long period of time, the reset mechanism will gradually accumulate fatigue due to repeated stress. When the fatigue strength is exceeded, the reset mechanism will no longer be reset, and the physical key will fail to continue to be used. At this time, it is necessary to replace the physical keys or even the entire control panel to continue using the electronic device.

In view of this, the present invention improves on the shortcomings of the traditional electronic device using physical keys as the control panel, in order to prolong the service life of the control panel and reduce the maintenance probability.

Another technical means of the present invention is to provide a touch module, which includes: 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 control induction 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 invention, the technical means adopted by the present invention is to provide an electronic device with touch function, which includes: a housing with an accommodating space inside and an operating surface outside; a shielding unit , Which is electrically connected to a fixed potential; a circuit board, which is arranged in the accommodating space of the housing and located between the operating surface of the housing and the shielding unit, the circuit board is provided with a number of floating contacts corresponding to the operating surface The control sensing electrode has a first insulating medium between the floating touch sensing electrode and the operation surface of the casing, and the shielding unit and the floating touch sensing electrode are insulated from each other.

The advantage of the present invention is that the floating touch sensing electrode on the circuit board is used to form a coupling capacitor with the finger of the user of the touch panel. The circuit board receives the change in capacitance to determine the position of the user's contact, and then learns what the user wants to press What is the key, and then perform corresponding command control, and in order to prevent the user from accidentally touching the opposite surface of the operation surface to form a coupling capacitor, the present invention also sets the circuit board between the operation surface and the shielding unit to prevent use When the user accidentally touches the opposite surface of the operation surface, a coupling capacitor is generated, thereby preventing the erroneous operation from occurring.

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

Referring to FIG. 1, the electronic device of the present invention includes a housing 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 housing 10 can be a housing of various electronic devices, such as an induction cooker, a stereo, and other household electrical appliances, but it is not limited thereto. The housing 10 has an accommodating space 11 inside, and the exterior of the housing 10 has an operation surface 12 on which a key position indication is provided for the user to trigger the 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 an 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 housing 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 aforementioned button position indication on the operation surface 12, then when the user touches each preset position, it corresponds to the corresponding The floating touch sensing electrode 31 forms a coupling capacitor, and triggers the command corresponding to the floating touch sensing electrode 31. Please refer to FIGS. 3 and 4. Between the floating touch-sensing electrode 31 and the operation surface 12, a coupling capacitance is formed due to the user’s finger 40 touching, and the shielding unit 20 responds to the floating touch-sensing electrode 31. The coupling capacitance is formed between the other side and the blocking occurs. If the user's finger 40 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 interacting with the operation The contact outside the surface 12 forms a coupling capacitor to avoid accidental touch.

The shielding unit 20 and the floating touch sensing electrode 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 floating touch sensing electrode 31 of the wire 20A and the circuit board 30 They are insulated from each other, and the end of the wire 20A is 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. The copper foil 20B can be attached to the circuit board 30 by an insulating coating on the surface of the circuit board 30 (not (Shown) to insulate the copper foil 20B and the floating touch sensing electrode 31 of the circuit board 30 from each other, and the end of the copper foil 20B is soldered to the fixed potential 32B of the circuit board 30.

In yet another embodiment, please refer to FIG. 2, the shielding unit 20 is attached to the inner wall surface of the housing 10, and there is a first gap 101 between the shielding unit 20 and the circuit board 30. The shielding unit 20 and the circuit board 30 are disposed in the first gap 101 by air or an insulating substance plug in the first gap 101, so that the floating touch of the shielding unit 20 and the circuit board 30 is touched The induction 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, there is a second gap 102 between the circuit board 20 and the operation surface 12, then the circuit board 30 and the operation surface 12 are separated by air or an insulation in the second gap 102 The material plug is disposed in the second gap 102 to insulate the floating touch sensing electrode 31 and the operation surface 12 from each other.

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

Therefore, through the arrangement of the floating touch sensing electrode 31, the user can achieve the function of triggering the preset command by changing the coupling capacitance formed between the finger and the floating touch sensing electrode 31, such as turning on the electronic device, The functions of turning off the electronic device, adjusting the heating power, adjusting the volume, and the like, and by setting the shielding unit 20, prevent the formation of a coupling capacitor on the side other than the operation surface 12, so as to avoid the phenomenon of actuation caused by accidental touch.

The above 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 in the above embodiments, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field of the art, Within the scope of not departing from the technical solution of the present invention, when the technical contents disclosed above can be used to make some modifications or modifications to equivalent embodiments of equivalent changes, but any content that does not depart from the technical solution of the present invention, based on 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: accommodating space 12: Operation surface 101: 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 view of the present invention. FIG. 2 is a schematic side cross-sectional view of another embodiment of the invention. FIG. 3 is a schematic diagram of forming a coupling capacitor in the present invention. 4 is a schematic diagram of forming a coupling capacitor according to another embodiment of the invention. FIG. 5 is a schematic diagram of a user accidentally touching a non-operation surface. FIG. 6 is a schematic diagram of the shielding unit being a wire. 7 is a schematic diagram of the shielding unit being copper foil.

10: Shell

11: accommodating space

12: Operation surface

102: second gap

20: Shading unit

30: circuit board

31: Floating touch sensing electrode

301: upper surface

302: Lower surface

Claims (12)

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, the shielding unit and the floating touch 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. The touch module according to claim 1, wherein the shielding unit is a wire, and an insulating coating layer is provided on the 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 the surface of the circuit board insulates the copper foil and the floating touch sensing electrode from each other. The touch module according to any one of claims 1 to 4, wherein a first gap is provided between the shielding unit and the circuit board, and a second insulating medium is disposed in the first gap, so that the The shielding unit and the floating touch sensing electrode are insulated from each other. The touch module according to claim 5, wherein the second insulating medium is air or an insulating substance plug located in the first gap is disposed 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 touch function, including: a housing with an accommodating space inside and an operating surface outside; a shielding unit electrically connected to a fixed potential; and a circuit board disposed on the The housing space of the housing is located between the operating surface of the housing and the shielding unit. The circuit board is provided with a number of floating touch sensing electrodes corresponding to the operating surface. The floating touch sensing electrodes and the operation of the housing There is a first insulating medium between the surfaces, and the shielding unit and the floating touch sensing electrode are insulated from each other. The electronic device with touch function according to claim 9, wherein the shielding unit is a copper foil, the copper foil is disposed in the accommodating space of the housing, and there is a first between the copper foil and the circuit board A gap and a second insulating medium are located in the first gap to insulate the copper foil and the floating touch sensing electrode from each other. The electronic device with touch function according to claim 10, wherein the second insulating medium is air or an insulating substance plug in the first gap disposed in the first gap. The electronic device with touch function according to claim 9, wherein there is a second gap between the circuit board and the operation surface of the casing, and the first insulating medium is air or a An insulating substance plug is provided in the second gap.

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