CN217508740U - Touch device and household appliance - Google Patents

Abstract

The application discloses touch device and domestic appliance, touch device includes main control board, touch pad and one or more infrared transceiver module. The touch pad and the main control board are arranged at intervals, and the touch pad is provided with a light-transmitting touch area. Infrared transceiver module includes infrared transmitter, infrared receiver and separates the optical element, infrared transmitter and infrared receiver all locate between touch panel and the main control board, infrared transmitter and infrared receiver all with main control board electric connection, at least one relative touch panel slope sets up in infrared transmitter and the infrared receiver, separate the optical element and set up in the main control board, separate the optical element and be located between infrared transmitter and the infrared receiver to the infrared light of avoiding infrared transmitter to send is by infrared receiver direct receiving. The touch device can enable infrared signals emitted by the infrared emitter to be directly and rapidly received by the infrared receiver, so that the sensitivity of the touch device is improved.

Description

Touch device and household appliance

Technical Field

The application relates to the field of household appliances, in particular to a touch device and a household appliance.

Background

Along with the improvement of living standard of people, household appliances with different functions are generally applied to the life of people, and convenience is provided for the life of people. In order to operate the household appliance, an infrared touch device is generally used to control the household appliance. The infrared touch device is arranged in the touch pad and comprises an infrared transmitter and an infrared receiver. When a finger is close to the touch pad, infrared light emitted by the infrared emitter passes through the touch pad and is reflected by the finger, and the reflected infrared light is received by the infrared receiver, so that the function of the infrared touch device corresponding to the household appliance is triggered. However, the infrared touch device may not be sensitive during use.

SUMMERY OF THE UTILITY MODEL

The application provides a touch device and household electrical appliance, can make infrared receiver among the infrared touch device comparatively directly and receive the infrared light signal that infrared emitter sent rapidly to improve the sensitivity of the touch device among the household electrical appliance.

In a first aspect, the present application provides a touch device, which includes a main control board, a touch pad, and one or more infrared transceiver modules; the touch pad is arranged at intervals with the main control board and is provided with a light-transmitting touch area; each infrared receiving method module includes infra-red transmitter, infrared receiver and separates the optical element, and infra-red transmitter and infrared receiver all locate between touch pad and the main control board, infra-red transmitter and infrared receiver all with main control board electric connection, at least one relative touch pad slope setting in infra-red transmitter and the infrared receiver, separate the optical element set up in the main control board, separate the optical element and be located between infra-red transmitter and the infrared receiver to avoid the infrared light that infra-red transmitter sent to be received by infra-red receiver directly.

In some embodiments, the angle of inclination is 55 degrees or greater and 65 degrees or less.

Based on the above embodiment, the infrared emitter emits infrared light at a set angle by setting the inclination angle, so that the infrared receiver can receive the infrared light conveniently; the infrared receiver can also receive the infrared light at a set angle, so that the infrared receiver can receive the infrared light emitted by the infrared emitter.

In some embodiments, the infrared emitter emits infrared light at an angle of 60 degrees relative to the board surface.

In some embodiments, each of the infrared transmitter and the infrared receiver of each of the infrared transceiver modules is disposed at an angle with respect to the touch panel.

Based on the above embodiment, the infrared transmitter and the infrared receiver are arranged obliquely in opposite directions, so that the infrared receiver can receive the infrared light emitted by the infrared transmitter.

In some embodiments, the infrared emitter has an infrared emitting end near the touch panel, and a distance between the infrared emitting end and the touch area is greater than or equal to 10mm and less than or equal to 20 mm.

Based on the above embodiment, on the premise that the infrared signal emitted by the infrared emitter can be received by the infrared receiver, the overall external dimension of the touch device can be limited, so that the touch device can be better installed on the household appliance.

In some embodiments, the infrared emitter emits infrared light that covers the touch area.

Based on the above embodiment, the infrared light emitted by the infrared emitter covers the touch area, and when an external object is close to or in contact with the touch area, the infrared light is projected to the external object and reflected by the external object only by contacting any position in the touch area, so that the operation convenience of a user can be improved, and meanwhile, the effectiveness of the contact between the external object and the touch area is ensured.

In some embodiments, the infrared emitters are disposed opposite to the touch area, and one infrared emitter corresponds to at least two infrared receivers, each of which is disposed around the infrared emitter.

Based on the above embodiment, through the above arrangement, the probability that the transmitted infrared light signal is received by the infrared receiver can be increased, and the infrared receiver is easy to receive the reflected infrared light signal, so that the sensitivity of the touch device is improved.

In some embodiments, any two infrared receivers are symmetrically disposed about the infrared transmitter.

Based on the above embodiment, the infrared emitter is just transmitting the infrared light signal to the touch area, the reflected infrared light signal is by transmitting to all around, and the angle of transmission is the same, so, the infrared receiver that the symmetry set up all around at the infrared emitter can receive the reflected infrared light signal more accurately, improves the accuracy that infrared receiver received the infrared light signal, and then improves touch device's sensitivity.

In some embodiments, the infrared receiver is disposed opposite to the touch area, an infrared receiver corresponds to at least two infrared transmitters, each infrared transmitter is disposed around the infrared receiver, and the infrared transmitters are disposed to incline toward the infrared receiver relative to the main control board.

Based on the above embodiment, through the above arrangement, it is possible to increase the speed at which the infrared light signal emitted by the emitter passes through the touch area more, is projected to an external object, and is reflected by the external object, and the reflected infrared light signal is easily received by the infrared receiver arranged in the middle, so that the speed at which the infrared receiver receives the reflected infrared light is increased, and the sensitivity of the touch device is improved.

In some embodiments, the touch device includes a backlight module, the backlight module is disposed between the touch panel and the main control board, the touch panel further includes a light-shielding area outside the touch area, the touch area includes a touch pattern and an infrared light-transmitting portion, the infrared light-transmitting portion corresponds to the touch pattern and allows infrared light to transmit therethrough, and light emitted from the backlight module can pass through the infrared light-transmitting portion to illuminate the touch pattern.

Based on the above embodiment, the infrared light-transmitting portion corresponds to the touch pattern and is transparent to light signals, so that the infrared light signals passing through the light-transmitting portion are projected to an external object and reflected by the external object, and the reflected infrared light signals pass through the light-transmitting portion and are transmitted to the infrared receiver, thereby triggering the functions of the household appliance corresponding to the touch area.

The light emitted by the backlight module can penetrate through the infrared light-transmitting part, and the shading area is positioned on the periphery of the light-transmitting part and cannot enable the light emitted by the backlight module to pass through. Therefore, the touch pattern can be displayed more clearly under the irradiation of the backlight module, and forms a more vivid contrast with the black of the peripheral light shielding area, so that the user can quickly identify the touch pattern.

In a second aspect, the present application further provides a household appliance, which includes a household appliance body and the touch device as described above, where the touch device is disposed on the household appliance body.

Based on above-mentioned embodiment, domestic appliance is provided with touch device, contained angle more than or equal to 55 degrees and less than or equal to 65 degrees between the transmission direction of the infrared light that infrared emitter sent and the face, when can making main control board and touch inter-plate reach less distance, guarantee that the infrared light of infrared emitter transmission can throw to external object, by external object reflection, the infrared receiver receipt of reflected infrared light signal is to make touch device miniaturization, and can improve touch device's sensitivity, and then improve domestic appliance's practicality.

By providing a touch device, at least one of an infrared emitter and an infrared receiver is inclined relative to a touch pad, so that when a small distance is reached between a main control board and the touch pad, infrared light emitted by the infrared emitter can be projected to an external object and reflected by the external object, and a reflected infrared light signal is received by the infrared receiver, so that the sensitivity of the touch device can be improved; the light blocking element can enable the infrared receiver to only receive infrared light signals reflected by external objects, so that the infrared light signals sent by the infrared transmitter are prevented from being directly received by the infrared receiver, and the accuracy of touch control is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or related technologies of the present application, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of a touch device according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a portion of the structure at A in FIG. 1;

FIG. 3 is a schematic diagram of a touch panel according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a touch device at another angle according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of another angle of a touch device according to an embodiment of the present disclosure;

FIG. 6 is a cross-sectional view taken along the line C-C of FIG. 5;

FIG. 7 is a schematic view of the structure of FIG. 6 at D;

FIG. 8 is a simplified block diagram of the structural relationship at D in FIG. 6;

FIG. 9 is a schematic diagram of an assembly of a main control board, an IR transmitter, and an IR receiver according to one embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a touch panel according to another embodiment of the present application;

FIG. 11 is a schematic view of the structure at B in FIG. 3;

fig. 12 is a schematic overall structure diagram of a touch device (with a fixing plate) according to an embodiment of the present disclosure;

fig. 13 is a schematic overall structure diagram of a household appliance according to an embodiment of the present application.

Reference numerals are as follows:

100. a touch device;

10. a touch panel; 11. a touch area; 111. a touch pattern; 1111. a power key; 1112. a low-grade key; 1113. a middle shift key; 1114. a high-grade key; 1115. an on-off key; 1116. an illumination key; 112. an infrared light-transmitting portion; 12. a light-shielding area; 13. plate surface;

20. a main control board;

30. an infrared emitter;

40. an infrared receiver;

50. a light-blocking element;

60. a backlight module;

70. a fixing plate; 710. a light-transmitting hole;

200. a household appliance; 210. the household electrical appliance body.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the related art, the infrared touch device includes a touch panel and a control circuit board, the touch panel and the control circuit board are disposed at an interval, the infrared touch device is disposed between the touch panel and the control circuit board, and the infrared touch device is mounted on the control circuit board and electrically connected to the control circuit board.

The infrared touch device comprises an infrared transmitter and an infrared receiver, when a finger approaches or touches the touch panel, an infrared light signal transmitted by the infrared transmitter penetrates the touch panel and is projected to the finger to be reflected by the finger, and the infrared receiver can receive the reflected infrared light signal, so that the infrared touch device triggers a corresponding function of the household appliance.

The emitting direction of the infrared emitter is perpendicular to the touch panel, infrared light emitted by the infrared emitter is perpendicularly projected to the finger and emitted by the finger, the infrared receiver can only receive part of infrared light reflected by the finger, and the infrared receiver can also not receive the infrared light in time, so that the infrared touch device cannot trigger the corresponding function of the household appliance in time.

Referring to fig. 1 and fig. 2, in order to make the infrared receiver 40 in the touch device 100 more directly and rapidly receive the infrared light signal emitted by the infrared emitter 30, the sensitivity of the touch device is improved. In a first aspect, the present application provides a touch device 100, where the touch device 100 includes a touch panel 10, a main control panel 20, and one or more infrared transceiver modules, each of which includes an infrared transmitter 30 and an infrared receiver 40.

The touch panel 10 may be provided on a housing of the home appliance as a part of the external appearance of the home appliance. The touch panel 10 may be made of one or more of metal, ceramic, glass, and plastic, for example, when the touch panel 10 is made of metal, stainless steel or aluminum alloy may be used. The overall shape of the touch panel 10 may be rectangular, circular, oval, racetrack, etc., and the touch panel 10 may also have some irregular shape, which is not specifically limited in this application.

In some embodiments, the touchpad 10 may be one or more. The position, number, etc. of the touch panels 10 may be set according to actual requirements.

Further, referring to fig. 3 in conjunction with fig. 1, according to different functional requirements of the household appliance, a plurality of transparent touch areas 11 may be disposed on the touch panel 10 for different functional operation positions. The user can operate (e.g., touch or approach) the touch area 11 to enable the touch device 100 to trigger a corresponding function of the household appliance. The number of the touch areas 11 may be plural, the plural touch areas 11 may be a power key 1111, a low-level key 1112, a middle-level key 1113, a high-level key 1114, an on-off key 1115, an illumination key 1116 and the like in sequence, and in some embodiments, the touch areas 11 may also be other function keys, which may be set according to specific requirements.

It is understood that the user's manipulation of the power key 1111 may control the home appliance to turn on or off the power; the user's operation of the low range key 1112 may cause the home appliance to run at low power; the household appliance can be operated at medium power by the user operating the middle-grade key 1113; user operation with the top-grade key 1114 may cause the home appliance to operate at high power; the user operates the on key 1115 to control the on or off of the household appliance; operation of the light key 1116 by a user may control the turning on or off of a light fixture within the appliance. In some specific embodiments, the type of the touch area 11 and the corresponding function on the touch panel 10 are not limited to the above-mentioned functions, and may be set according to different requirements.

In some embodiments, the touch panel 10 may further include a display area (not shown), and the display area may be used to display operating parameters of the household appliance, such as operating mode, operating duration, operating power, and the like, and also display states of the household appliance, such as on or off state of a power supply, magnitude state of power, on or off state of the household appliance, and on and off state of a lighting function.

Referring to fig. 4 to 7, the main control board 20 is spaced apart from the touch pad 10, and the touch pad 10 has a pad surface 13 facing the main control board 20. The main control board 20 may be a printed circuit board, a flexible circuit board or a rigid-flex board, and the main control board 20 may be laid with connection lines for connecting with different electronic components. An installation space (not shown) is provided between the main control board 20 and the touch panel 10, and each infrared transceiver module is located in the installation space, that is, each infrared transmitter 30 and each infrared receiver 40 are located in the installation space.

The infrared emitter 30 is mounted on the main control board 20 and electrically connected to the main control board 20, and the main control board 20 can provide the infrared emitter 30 with electric power required for operation, so that the infrared emitter 30 emits an infrared light signal that can pass through the touch area 11.

Referring to fig. 5 to 7, fig. 5 is a schematic view of an overall structure of the touch device 100 at another angle, and fig. 6 is a cross-sectional view taken along a direction C-C in fig. 5; FIG. 7 is a schematic view of the structure at D in FIG. 6; fig. 8 is a simplified structural diagram of the structural relationship at D in fig. 6 to show the positional relationship among the structures in the touch device 100. Specifically, P is the position of the ir emitter 30, Q is the position of the ir receiver 40, O is the position of an external object, and W is the middle position between the ir emitter 30 and the ir receiver 40.

The infrared emitter 30 is disposed toward the touch area 11, so that the emitted infrared light signal passes through the touch area 11, is projected to an external object, and is reflected by the external object, and the external object can reflect the infrared light signal, and the reflected infrared light signal can enter the touch panel 10. It should be noted that the external object may be a finger or other objects capable of shielding light, for example, the finger may contact or approach the touch area 11, the infrared light signal may be projected to the finger, and the infrared light signal is reflected by the finger.

The infrared transmitter 30 may transmit an infrared light signal in a direction inclined toward the infrared receiver 40 with respect to the touch panel 10, and the infrared receiver 40 coupled with the infrared transmitter 30 is directed perpendicularly toward the touch panel 10. When the included angle phi between the emitting direction of the infrared light emitted by the infrared emitter 30 and the touch panel 10 is greater than or equal to 55 degrees and less than or equal to 65 degrees, a small distance between the main control board 20 and the touch panel 10 can be achieved, and it can be ensured that the infrared light emitted by the infrared emitter 30 is projected to an external object and reflected by the external object, and the reflected infrared light signal can be received by the infrared receiver 40, so that the touch device 100 is miniaturized, and the sensitivity of the touch device 100 can be improved. The infrared emitters 30 may be tilted at an angle phi, i.e., the infrared emitters 30 are tilted at an angle phi with respect to the touch panel 10, which may also be the angle between the direction of emission of the infrared emitters 30 and the touch panel 10. Of course, the infrared receiver 40 may have an inclination angle, that is, the infrared receiver 40 is inclined with respect to the touch panel 10 at an angle, which may be an angle between a light receiving direction of the infrared receiver 40 and the touch panel 10. The infrared transmitter 30 and the infrared receiver 40 may be tilted toward each other, i.e., the infrared transmitter 30 and the infrared receiver 40 each have a tilt angle. Each infrared transceiver module may have one or more infrared transmitters 30 and one or more infrared receivers 40, and in each infrared transceiver module, at least one of the infrared transmitters 30 and the infrared receivers 40 is disposed in an inclined manner, that is, each infrared transmitter 30 may have an inclined angle, each infrared receiver 40 may have an inclined angle, or each infrared transmitter 30 and each infrared receiver 40 may have an inclined angle.

It should be noted that, referring to fig. 6 to 8, an included angle Φ between the emitting direction of the infrared light from the infrared emitter 30 and the touch panel 10 and the incident angle α of the infrared light are complementary, and then the incident angle α of the infrared emitter 30 is greater than or equal to 25 degrees and less than or equal to 35 degrees.

Referring to fig. 7, the infrared receiver 40 is also mounted on the main control board 20 and electrically connected to the main control board 20, and the main control board 20 can provide the infrared receiver 40 with power required for operation. The infrared receiver 40 may receive an infrared light signal reflected by an external object, and further trigger a function of the household appliance corresponding to the touch device 100.

In order to avoid crosstalk between the infrared light signal emitted from the infrared emitter 30 and the infrared light signal received by the infrared receiver 40, please refer to fig. 7 to 8, a safety distance PQ is usually disposed between the infrared emitter 30 and the infrared receiver 40, so that the infrared light signal emitted from the infrared emitter 30 and the reflected infrared light signal received by the infrared receiver 40 are independent of each other, and the interference caused by too small distance between the two signals is avoided.

In the embodiment of the present application, an included angle between the emitting direction of the infrared light emitted by the infrared emitter 30 and the touch panel 10 is 60 degrees, and a distance between the touch panel 10 and the main control board 20 may be greater than or equal to 10mm and less than or equal to 20 mm.

Specifically, referring to fig. 5 to 8, the distance OW between the main control panel 20 and the panel surface 13 of the touch panel 10 is generally limited to a range of 15mm ± 5mm, the distance PQ between the infrared emitter 30 and the infrared receiver 40 is generally set to a range of 20mm ± 5mm, and W is the midpoint of PQ. Taking OW equal to 15mm and PQ equal to 20mm as an example, as can be seen from fig. 6, an angle Φ between an infrared light emitting direction of the infrared emitter 30 and the touch panel 10, tan Φ equal to tan ═ OPW equal to OW/PW equal to 1.5, and Φ equal to ═ OPW equal to 60 degrees, and an incident angle α at this time is equal to 30 degrees.

When the infrared transmitter 30 is inclined toward the infrared receiver 40 with respect to the touch panel 10 and the infrared receiver 40 is oriented perpendicularly to the touch panel 10, the infrared transmitter 30 may have an infrared light emitting direction that is within a range of 55 degrees or more and 65 degrees or less from the touch panel 10; when the infrared receiver 40 is tilted toward the infrared emitter 30 with respect to the touch panel 10 and the infrared emitter 30 is vertically oriented with respect to the touch panel 10, the angle between the light receiving direction of the infrared receiver 40 and the touch panel 10 may be limited to 55 degrees or more and 65 degrees or less.

In order to effectively project the infrared light emitted by the infrared emitter 30 to the external object, the infrared light emitted by the infrared emitter 30 needs to cover the entire touch area 11, and when the external object is close to the touch area 11 or contacts the touch area 11, the infrared light is reflected only by contacting any position in the touch area 11, so that the operation convenience of a user can be improved, and the effectiveness of the contact between the external object and the touch area 11 can be ensured.

In some embodiments, referring to fig. 9 and 10, the emitting direction of the infrared emitter 30 is perpendicular to the touch area 11 of the touch panel 10, and two infrared receivers 40 may be disposed in cooperation with one infrared emitter 30, so as to increase the probability that the emitted infrared light signal is received by the infrared receiver 40, facilitate the infrared receiver 40 to receive the reflected infrared light signal, and improve the sensitivity of the touch device 100. In some embodiments, there may be a plurality of infrared receivers 40 (4 in the figure) matched with one infrared transmitter 30, and in this case, the plurality of infrared receivers 40 may simultaneously receive the reflected infrared light signal, so as to increase the speed of the touch response and further increase the sensitivity of the touch device 100.

Further, the plurality of infrared receivers 40 may be disposed on the periphery of the infrared emitter 30, and are uniformly distributed on the periphery of the infrared emitter 30, the infrared light signal passes through the touch area 11 and is projected to the external object, because the projected infrared light is different from the contact surface of the external object, and further the angle of emitting the infrared light signal is also different, the infrared receivers 40 disposed on the periphery of the infrared emitter 30 may receive the reflected infrared light signal at multiple angles, so that the probability of receiving the emitted infrared light signal by the infrared receivers 40 may be increased, and further, the infrared receivers 40 may easily receive the reflected infrared light signal.

In order to enable the infrared light signal reflected by the external object to be received by the infrared receiver 40, any two infrared receivers 40 of the plurality of infrared receivers 40 need to be symmetrically arranged with respect to the infrared transmitter 30, the infrared transmitter 30 directly faces the touch area 11 to transmit the infrared light signal, the reflected infrared light signal is transmitted to the periphery, and the transmission angles are the same, so that the infrared receivers 40 symmetrically arranged on the periphery of the infrared transmitter 30 can more accurately receive the reflected infrared light signal, the accuracy of receiving the infrared light signal by the infrared receiver 40 is improved, and the sensitivity of the touch device 100 is further improved.

In some embodiments, the infrared receiver 40 is also disposed opposite to the touch area 11, one infrared receiver 40 corresponds to two infrared transmitters 30, two infrared transmitters 30 are located on the periphery of the infrared receiver 40, and two infrared transmitters 30 are disposed obliquely to the infrared receiver 40 relative to the touch pad 10, so that when an external object approaches or contacts the touch area 11, the two infrared transmitters 30 simultaneously transmit infrared light signals, which is beneficial to increase the infrared light signals projected onto the external object. The emitted infrared light signal is reflected by an external object, and the reflected infrared light signal is easily received by the infrared receiver 40 disposed in the middle, so that the speed of receiving the reflected infrared light by the infrared receiver 40 is increased, and the sensitivity of the touch device 100 is improved.

When one infrared receiver 40 corresponds to the plurality of infrared emitters 30, the plurality of infrared emitters 30 are located on the periphery of the infrared receiver 40, and the plurality of infrared emitters 30 are obliquely arranged toward the infrared receiver 40 with respect to the touch panel 10, so that the infrared light signals emitted by the infrared emitters 30 are more transmitted to an external object, the emitted infrared light signals are reflected by the external object, the reflected infrared light signals are easily received by the infrared receiver 40 arranged in the middle, and further, the speed of receiving the reflected infrared light by the infrared receiver 40 is increased, so as to improve the sensitivity of the touch device 100.

In order to prevent the infrared transmitter 30 from emitting an infrared signal and the infrared signal reflected by an external object from crosstalk, please refer to fig. 2 in conjunction with fig. 1, each infrared transceiver module of the touch device 100 further includes a light-blocking element 50, the light-blocking element 50 is disposed on the main control board 20 and located between the infrared transmitter 30 and the infrared receiver 40, and the light-blocking element 50 enables the infrared receiver 40 to receive only the reflected infrared signal, so as to prevent the infrared signal emitted by the infrared transmitter 30 from being directly received by the infrared receiver 40, thereby improving the accuracy of the touch device 100. When each ir transceiver module comprises one ir transmitter 30 and one or more ir receivers 40, a light blocking element 50 is disposed between the ir transmitter 30 and each ir receiver 40. When each ir transceiver module comprises one or more ir transmitters 30 and one ir receiver 40, a light blocking element 50 is provided between the ir receiver 40 and each ir receiver 40.

In some embodiments, the light blocking element 50 may be a light blocking plate, and the light blocking plate may be a physical plate, and the light blocking plate is erected between the infrared emitter 30 and the infrared receiver 40 and has a certain height, and in the embodiment of the present application, referring to fig. 8, since the distance OW between the main control board 20 and the panel surface 13 of the touch pad 10 is usually limited to 15mm ± 5mm, the height of the light blocking plate is usually set to 10mm ± 2 mm. One end of the shading baffle is fixed on the main control board 20, the other end extends towards the direction far away from the main control board 20, the infrared transmitter 30 and the infrared receiver 40 are uniformly distributed on two sides of the shading baffle, the infrared light signals transmitted by the infrared transmitter 30 and the reflected infrared light signals are isolated, and crosstalk between the light signals transmitted by the infrared transmitter 30 and the light signals reflected by external objects is avoided. Further, the light blocking element 50 may also be an electronic device, and the electronic device is connected to the main control board 20 and disposed between the infrared emitter 30 and the infrared receiver 40. When an external object approaches or contacts the touch area 11, the controller on the main control board 20 may control the electronic device to turn the electronic device into black, so as to prevent the optical signal from passing through the electronic device, to isolate the optical signal emitted by the infrared emitter 30 from the reflected optical signal, and to prevent the optical signal emitted by the emitter from crosstalk with the reflected optical signal. In some embodiments, the main control board 20 may also control the electronic device to be in the black state all the time, or may only be in the black state when the external object is in contact with the touch area 11, and be in the light-transmitting state at other times.

The infrared light signal emitted from the infrared emitter 30 passes through the touch panel 10 and is projected to an external object, and the external object reflects the infrared light signal. Referring to fig. 7, in order to reduce or avoid the incident light and the reflected light being blocked by the light-blocking element 50, the top of the light-blocking element 50 and the touch panel 10 need to be spaced a certain distance apart, so as to have a sufficient light path space and avoid the light-blocking element 50 from affecting the emitted light and the reflected light; and near the main control board 20, the bottom of the light-blocking element 50 isolates the infrared light signal emitted by the infrared emitter 30 from the infrared light signal reflected by an external object, so as to avoid crosstalk.

Further, referring to fig. 6 to 7, the infrared receiver 40 and the infrared transmitter 30 are symmetrically disposed about the light blocking element 50, and since the touch device 100 utilizes the reflection principle of light, the incident angle α and the emitting angle γ of the infrared light signal projected to the external object are equal. When the infrared receiver 40 and the infrared transmitter 30 are symmetrical with respect to the light blocking element 50, it is equivalent to that the infrared transmitter 30 is located on an extension line of the transmitted light, and the infrared receiver 40 is located on an extension line of the reflected light, and is equal to the exit angle γ according to the incident angle α, so that the light transmitted by the infrared transmitter 30 directly enters the infrared receiver 40 through reflection, the reaction speed of the infrared receiver 40 is increased, and the sensitivity of the touch device 100 is further increased.

In order to facilitate the identification of the positions of the different touch areas 11 on the touch panel 10, please refer to fig. 11 in conjunction with fig. 3, a transparent touch pattern 111 is disposed in the touch area 11, and the touch pattern 111 is used for indicating the positions of the touch areas 11. In the embodiment of the present application, the illustrated touch pattern 111 can be used to correspond to the power key 1111, the low-level key 1112, the middle-level key 1113, the high-level key 1114, the switch key 1115 and the illumination key 1116. It should be noted that, when the touch pattern 111 corresponds to different functions, the user needs to recognize and determine the function corresponding to the touch pattern 111, and the function identifier can also be used as the touch pattern 111, so as to facilitate the user to quickly recognize the function. Thus, on the one hand, the touch pattern 111 distinguishes the touch areas 11 with different functions, so as to facilitate identifying the touch positions with different functions on the touch pad 10, and on the other hand, the touch pattern 111 is simple, so that the appearance neatness and the aesthetic property of the touch device 100 can be improved, and the use experience of the user can be further improved.

Further, referring to fig. 1 in conjunction with fig. 3, the touch area 11 includes a touch pattern 111 and an infrared transparent portion 112, the infrared transparent portion 112 is disposed corresponding to the touch pattern 111 and is transparent to infrared light signals, so that the infrared light signals passing through the infrared transparent portion 112 are projected to an external object and reflected by the external object, and the reflected infrared light passes through the infrared transparent portion 112 and is transmitted to the infrared receiver 40 to trigger a function corresponding to the touch area 11 on the touch device 100.

Further, referring to fig. 11, the touch pattern 111 is a hollow area with a certain shape, and the hollow area is filled with glue, and the glue is filled to form the infrared light-transmitting portion 112. When the touch pattern 111 is formed, the touch pattern 111 is first formed by hollowing out the touch pad 10, and then the infrared light-transmitting portion 112 is formed by filling glue into the hollowed-out area. The infrared light-transmitting portion 112 is formed on the touch panel 10 by glue pouring, and is easy and convenient to process, and the touch area 11 can have good waterproof performance.

Referring to fig. 1, the touch panel 10 includes a touch area 11 and a light-shielding area 12, where the touch area 11 is an area for a user to touch. The touch device 100 further includes a backlight module 60, the backlight module 60 is disposed between the touch panel 10 and the main control panel 20, the backlight module 60 is mounted on the main control panel 20 and electrically connected to the main control panel 20, light emitted from the backlight module 60 can pass through the infrared light-transmitting portion 112, and the light-shielding region 12 is located around the infrared light-transmitting portion 112, and the light-shielding region 12 cannot pass through light emitted from the backlight module 60. Thus, the touch pattern 111 can be clearly displayed under the irradiation of the backlight module 60, and the touch pattern 111 and the black color of the peripheral light-shielding region 12 form a clear contrast, so that the user can quickly identify the touch pattern 111.

Further, the number of the backlight modules 60 may be equal to the number of the touch areas 11 and correspond to the positions of the touch areas 11 one by one, the backlight modules 60 may be light emitting diodes (leds), the backlight modules 60 may emit visible light, and light emitted by the backlight modules 60 passes through the infrared light-transmitting portion 112 and then can be seen by a user to indicate specific positions and types of the touch areas 11 triggered by the user.

In some embodiments, referring to fig. 12, the touch device 100 may further include a housing (not shown) for mounting the touch pad 10 and the main control board 20, and a fixing plate 70, wherein the housing can fix the positions of the touch pad 10 and the main control board 20 to improve the integrity of the touch pad 10 and the main control board 20.

The fixing plate 70 is installed in the housing and located between the touch pad 10 and the main control panel 20, and the fixing plate 70 is provided with the light holes 710 corresponding to the infrared emitters 30 and the infrared receivers 40, so that the infrared emitters 30 and the infrared receivers 40 corresponding to the adjacent touch areas 11 can be isolated, interference between the infrared emitters 30 and the infrared receivers 40 corresponding to the two adjacent touch areas 11 is avoided, and accuracy of transmitting and receiving infrared signals is improved.

Further, the main control board 20 is fixed to the touch panel 10 by the fixing board 70, so that the main control board 20 is isolated from the touch panel 10, and the insulating property between the main control board 20 and the touch panel 10 is improved.

In some embodiments, the fixing plate 70 is provided with a receiving groove (not shown) matching with the shape of the main control plate 20, and the main control plate 20 is placed in the receiving groove, so that the thickness space of the fixing plate 70 can be fully utilized by receiving and fixing the main control plate 20 in the receiving groove, which is beneficial to reducing the overall size and improving the safety performance of the main control plate 20.

In some embodiments, the infrared transmitters 30 corresponding to different touch areas 11 may transmit light signals of different frequencies, and accordingly, the infrared receivers 40 corresponding to the infrared transmitters 30 are used to receive light signals of different frequencies.

Specifically, an optical filter may be disposed on the optical path of the infrared receiver 40 to filter out optical signals outside a predetermined frequency. In use, even if the light emitted by the infrared emitter 30 passes through the adjacent touch area 11 after being reflected due to the reflection surface of an external object and the like, the light cannot be received by the adjacent infrared receiver 40, so that false triggering is avoided, meanwhile, the touch area 11 is more densely arranged, and under the condition of limited space, a plurality of touch areas 11 can be arranged to meet the multifunctional requirement of the household appliance.

In a second aspect, please refer to fig. 13, the present application provides a household electrical appliance 200, in which the household electrical appliance 200 includes a household electrical appliance body 210 and the touch device 100, the touch device 100 is disposed on the household electrical appliance body 210 to set different function requirements of the household electrical appliance body 210, and specifically, each of the different touch areas 11 corresponds to a different function.

The position of the touch device 100 can be set according to the actual operation requirement and the function requirement, for example, the household appliance 200 is placed at a high position, and the touch device 100 can be arranged on the peripheral outer wall to facilitate the operation; the touch device 100 may be disposed on the outer wall of the top side of the small-sized home appliance 200, in which the home appliance 200 is placed at a lower position or on a table top, so as to facilitate operation; for the household appliance 200 with simpler functions, the functional keys are fewer, and the smaller touch panel 10 can meet the requirements, and for the household appliance 200 with more functions, the larger touch panel 10 is needed; for a large household appliance 200 that needs to be controlled at different positions, a plurality of touch panels 10 need to be provided to meet the control requirements of the user.

The household appliance 200 is provided with the touch device 100, so that the infrared emitter 30 and the infrared receiver 40 can be located within a limited distance between the touch pad 10 and the main control board 20, and an infrared signal emitted by the infrared emitter 30 is received by the infrared receiver 40 relatively directly and rapidly, thereby improving the sensitivity of the touch device 100.

The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A touch device, comprising:

a main control board;

the touch panel is arranged at intervals with the main control board and is provided with a light-transmitting touch area; and a process for the preparation of a coating,

one or more infrared transceiver modules, each infrared receiving module includes infrared transmitter, infrared receiver and separates light component, infrared transmitter with infrared receiver all locates the touch pad with between the main control board, infrared transmitter with infrared receiver all with main control board electric connection, at least one in infrared transmitter with in the infrared receiver is relative the touch pad slope sets up, separate light component set up in the main control board, separate light component be located between infrared transmitter and the infrared receiver to avoid the infrared light that infrared transmitter sent by infrared receiver is by infrared receiver direct receiving.

2. The touch device of claim 1, wherein the inclination angle is greater than or equal to 55 degrees and less than or equal to 65 degrees.

3. The touch device of claim 1, wherein in each of the infrared transceiver modules, the infrared transmitter and the infrared receiver are both disposed in an inclined manner with respect to the touch panel.

4. The touch device according to claim 1, wherein a distance between the touch pad and the main control board is greater than or equal to 10mm and less than or equal to 20 mm.

5. The touch device of claim 1, wherein the infrared emitter emits infrared light that covers the touch area.

6. The touch device of claim 1, wherein the infrared emitters are disposed opposite to the touch area, one of the infrared emitters corresponds to at least two of the infrared receivers, and each of the infrared receivers is disposed around the infrared emitter.

7. The touch device of claim 6, wherein any two of the infrared receivers are symmetrically disposed about the infrared transmitter.

8. The touch device of claim 1, wherein the infrared receiver is disposed opposite to the touch area, one infrared receiver corresponds to at least two infrared emitters, each infrared emitter is disposed around the infrared receiver, and the infrared emitter is disposed obliquely to the infrared receiver relative to the touch pad.

9. The touch device of claim 1, wherein the touch device comprises a backlight module disposed between the touch pad and the main control board, the touch pad further comprises a light-shielding region outside the touch region, the touch region comprises a touch pattern and an infrared light-transmitting portion, the infrared light-transmitting portion corresponds to the touch pattern and allows infrared light to transmit therethrough, and light emitted from the backlight module can pass through the infrared light-transmitting portion to illuminate the touch pattern.

10. A household appliance, comprising a household appliance body and the touch device as claimed in any one of claims 1 to 9, wherein the touch device is disposed on the household appliance body.

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