A touch switch assembly

Abstract

This application provides a touch-sensitive switch assembly, relating to the field of touch sensing. The touch-sensitive switch assembly includes a cover plate, a touch diaphragm, a mounting bracket, and a control circuit board. The cover plate and the mounting bracket are fixedly connected, and the touch diaphragm is sandwiched between the cover plate and the mounting bracket. The touch diaphragm is electrically connected to the control circuit board. The touch diaphragm includes multiple sub-electrodes, which are spaced apart along a preset direction. At least one end of each sub-electrode has a concave-convex structure. The concave-convex structures of adjacent sub-electrodes cooperate and are spaced apart from each other. By providing a concave-convex structure at at least one end of each sub-electrode, the density of electrode boundary changes is increased while maintaining the non-overlapping of adjacent sensing areas. This increases the number of discernible touch position points under the same number of sub-electrodes, thereby improving the touch resolution and sensitivity of the switch assembly.

Description

Technical Field

[0001] This utility model relates to the field of touch sensing technology, and in particular to a touch switch assembly. Background Technology

[0002] With the development of smart home appliances, kitchen equipment such as steam ovens are increasingly adopting touch control panels to replace traditional mechanical buttons. Capacitive touch panels, due to their advantages such as simple structure, attractive appearance, and ease of cleaning, have been widely used in the control systems of steam ovens. Existing capacitive touch technology uses touch electrodes formed on a diaphragm to detect changes in capacitance when a user's finger approaches or touches the device, thereby enabling function selection and parameter adjustment.

[0003] Existing touch films mostly use linear arrangement for touch electrode layout. Although this is simple to implement, the number of touch points that can be detected within a limited panel size is limited, resulting in low resolution and low adjustment accuracy during sliding operations. Traditional linear layout is prone to generating sensing blind spots, which reduces the stability of touch recognition. Utility Model Content

[0004] The purpose of this invention is to address at least one of the aforementioned existing technical problems by providing a touch switch assembly that can provide mutually cooperating and spaced concave-convex structures at the end of the sub-electrode sheet, thereby improving touch position resolution and reducing sensing blind spots.

[0005] This utility model provides a touch switch assembly, which includes a cover plate, a touch diaphragm, a mounting bracket, and a control circuit board; The cover plate and the mounting bracket are fixedly connected, the touch diaphragm is sandwiched between the cover plate and the mounting bracket, and the touch diaphragm is electrically connected to the control circuit board; The touch film includes a plurality of sub-electrode sheets, which are spaced apart along a preset direction, and at least one end of each sub-electrode sheet is provided with a concave-convex structure, wherein the concave-convex structures of two adjacent sub-electrode sheets are matched and spaced apart from each other.

[0006] In a possible implementation, the concave-convex mechanism is a toothed profile, which is provided with alternating tooth tips and tooth valleys, and the tooth tips of the sub-electrode sheet are matched with the tooth valleys of the adjacent sub-electrode sheet.

[0007] In a possible implementation, the tooth tips or valleys of the tooth-shaped profile are either zigzag or arc-shaped. In a possible implementation, the touch film has a strip-shaped structure, and multiple sub-electrode sheets are arranged at intervals along a straight trajectory.

[0008] In a possible implementation, the touch film has a ring structure, and multiple sub-electrode sheets are arranged at intervals along a ring trajectory.

[0009] In a possible implementation, the touch film includes a protective layer, a pattern layer, a base layer, a light-shielding layer, an adhesive layer, and a release layer arranged in sequence.

[0010] In a possible implementation, the touch film further includes a reinforcing layer, a conductive carbon layer, and a buffer layer; The reinforcing layer is attached to the tail area of ​​the substrate layer facing the pattern layer, and the buffer layer and the conductive carbon layer are respectively attached to the tail area of ​​the substrate layer facing the light-shielding layer, with the buffer layer and the conductive carbon layer disposed adjacent to each other.

[0011] In a possible implementation, the cover plate and the touch diaphragm are spaced apart. In a possible implementation, the touch switch assembly further includes a display light source electrically connected to the touch diaphragm. The display light source is disposed on the side of the control circuit board facing the cover plate, so that the light emitted by the display light source can pass through the touch diaphragm and the cover plate in sequence.

[0012] In a possible implementation, the cover plate includes a display panel, an outer bracket, and an inner bracket; The outer bracket is fixedly connected to the display panel, and the inner bracket is disposed on the side of the outer bracket away from the display panel and is fixedly connected to the outer bracket.

[0013] The touch switch assembly provided by this utility model has the following beneficial effects: This utility model provides a touch switch assembly, which includes a cover plate, a touch diaphragm, a mounting bracket, and a control circuit board. The cover plate and the mounting bracket are fixedly connected, and the touch diaphragm is sandwiched between the cover plate and the mounting bracket. The touch diaphragm is electrically connected to the control circuit board. The touch diaphragm includes multiple sub-electrodes, which are spaced apart along a preset direction. At least one end of each sub-electrode has a concave-convex structure. The concave-convex structures of adjacent sub-electrodes cooperate and are spaced apart from each other. By providing a concave-convex structure at at least one end of each sub-electrode, the density of electrode boundary changes is increased while maintaining the non-overlapping of adjacent sensing areas. This increases the number of discernible touch position points under the same number of sub-electrodes, thereby improving the touch resolution and sensitivity of the switch assembly. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an exploded view of the switch assembly in an embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of the touch film in an embodiment of this utility model; Figure 3 This is a schematic diagram of the structure of the touch film in an embodiment of this utility model; Figure 4 This is a cross-sectional structural diagram of the touch film in an embodiment of the present invention; Figure 5 This is an exploded view of the cover plate in an embodiment of this utility model; Figure 6 This is a schematic diagram of the cover plate in an embodiment of the present utility model; Figure 7 This is a schematic diagram of the mounting bracket in an embodiment of the present utility model.

[0016] The following is supplementary explanation of the attached figures: 1. Touch film; 11. Protective layer; 12. Pattern layer; 13. Base layer; 14. Light-shielding layer; 15. Adhesive layer; 16. Release layer; 17. Reinforcing layer; 18. Conductive carbon layer; 19. Buffer layer; 2. Cover plate; 21. Display panel; 22. Outer bracket; 23. Inner bracket; 3. Mounting bracket; 4. Control circuit board. Detailed Implementation

[0017] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0019] Understandably, with the improvement of people's living standards and the increasing demand for smart homes, the interactivity and ease of operation of kitchen appliances have become important research directions. Traditional mechanical buttons and touch switches have problems such as high failure rates, inconvenient operation, and difficulty in cleaning, and have been gradually phased out by the market. At present, touch button interaction technology is widely used in home appliances due to its advantages such as no moving mechanical parts, long service life, aesthetics, and easy cleaning.

[0020] Currently, touch interaction technology for kitchen appliances falls into two main branches: one is the touch spring solution, which is inexpensive, with buttons displayed through perforated diaphragms; however, it is limited by the number of springs and assembly requirements, resulting in a small number of buttons and a poor touch experience. The other is the capacitive and resistive screen solution, where buttons are directly displayed on the screen, offering rich content and colors, abundant button functions, and a superior touch experience, but at a high cost.

[0021] This application provides a touch switch assembly, which includes a cover plate 2, a touch diaphragm 1, a mounting bracket 3, and a control circuit board 4. The cover plate 2 and the mounting bracket 3 are fixedly connected, and the touch diaphragm 1 is sandwiched between the cover plate 2 and the mounting bracket 3. The touch diaphragm 1 is electrically connected to the control circuit board 4. The touch diaphragm 1 includes multiple sub-electrodes, which are spaced apart along a preset direction. At least one end of each sub-electrode has a concave-convex structure, and the concave-convex structures of adjacent sub-electrodes cooperate and are spaced apart from each other. By providing a concave-convex structure at at least one end of each sub-electrode, the density of electrode boundary changes is increased while maintaining the non-overlapping of adjacent sensing areas. This increases the number of discernible touch positions with the same number of sub-electrodes, improving the touch resolution and sensitivity of the switch assembly.

[0022] Specifically, when a user's finger or a conductive object slides on the surface of the touch diaphragm 1, the control circuit board 4 collects the capacitance change signals of each sub-electrode. Since the boundaries of adjacent sub-electrode sheets are concave-convex, the sliding path will frequently cross the electrode boundaries, thereby generating more detectable position points under the condition of the same number of sub-electrode sheets, achieving higher resolution and trajectory recognition accuracy.

[0023] Specifically, the touch film is an ITO (indium tin oxide) thin film, which is a composite oxide made by mixing indium oxide (In2O3) and tin oxide (SnO2) in a certain proportion. ITO thin film is an n-type semiconductor with high light transmittance and high conductivity. The sheet resistance of the film can be as low as 11.3 Ω / sq, and the touch capacitance conduction performance is excellent.

[0024] In one embodiment, the cover plate 2 is located on the outermost side of the switch assembly. The cover plate 2 is rectangular or designed with a specific shape according to the appearance of the device. The cover plate 2 is made of tempered glass, acrylic sheet or polycarbonate sheet. The surface can be treated by spraying, screen printing, coating or other processes to form patterns and light-transmitting areas. The cover plate 2 is provided with positioning steps or buckles around its perimeter for cooperating with the mounting bracket 3. Touch films 1 are spaced apart on the inner side of the cover plate 2. The thickness of the touch films 1 is 0.05mm to 0.2mm. The touch films 1 are made of transparent ITO substrate. The ITO layer is etched to form multiple independent sub-electrode sheets.

[0025] In one embodiment, multiple sub-electrode sheets are spaced apart along a predetermined direction. One end of the long side of each electrode sheet is machined with a concave-convex profile, which is composed of several tooth tips and tooth valleys. The tooth tips and tooth valleys of two adjacent electrode sheets correspond to each other. The electrode leads of the touch film 1 extend to the tail area and are connected to the control circuit board 4 via a flexible flat cable.

[0026] Preferably, the spacing between adjacent sub-electrode sheets is 0.5 mm to 2 mm. Specifically, the mounting bracket 3 is located on the back of the cover plate 2, and the material of the mounting bracket 3 is injection-molded ABS, PC+ABS alloy or nylon. The front surface of the mounting bracket 3 is fixedly connected to the cover plate 2. The inner side of the mounting bracket 3 forms a mounting groove for placing the touch film 1. The depth of the groove matches the thickness of the touch film 1, and a lead wire channel is reserved in the groove.

[0027] Optionally, the mounting bracket 3 and the cover plate 2 can be connected by ultrasonic welding, snap-fit, or screw fixing.

[0028] Specifically, the control circuit board 4 is fixed to the back of the mounting bracket 3. The control circuit board 4 is a printed circuit board. The front of the control circuit board 4 is soldered with a touch detection chip, a drive circuit, a signal processor, and interface components. The tail flexible ribbon cable is connected to the socket on the control circuit board 4 through a crimping seat. The cover plate 2, the touch diaphragm 1, the mounting bracket 3, and the control circuit board 4 are arranged and fixed together from the outside to the inside. After assembly, the sensing area of ​​the touch diaphragm 1 is capacitively coupled to the outside through the cover plate 2 to realize touch signal acquisition.

[0029] In one embodiment, the concave-convex mechanism is a toothed profile with alternating tooth tips and tooth valleys. The tooth tips of the sub-electrode pieces engage with the tooth valleys of adjacent sub-electrode pieces. By engaging the tooth tips of the toothed profile with the tooth valleys of adjacent sub-electrode pieces, the sensing areas of adjacent sub-electrode pieces are distributed in an interlocking manner at the boundary, reducing the sensing dead zone of the switching component and preventing signal instability or loss when the touch position is critical.

[0030] Specifically, the touch film 1 includes multiple sub-electrode sheets arranged at intervals along a preset trajectory, and the edge of each sub-electrode sheet is processed into a serrated profile. The serrated profiles of two adjacent sub-electrode sheets are arranged in a staggered manner in the arrangement direction, so that the tooth tip of the first sub-electrode sheet corresponds to the tooth valley of the second sub-electrode sheet. The tooth tips and tooth valleys of the serrated profiles are alternately distributed along the edge of the sub-electrode sheets, and the tooth tips and tooth valleys can be of the zigzag or arc shape.

[0031] Specifically, the tip of the tooth and the bottom of the tooth valley of the adjacent sub-electrode plate are aligned on the plane projection and maintain a preset interval distance of 0.1~0.5 mm. The control circuit board 4 is connected to the lead-out end of the sub-electrode plate via a ribbon cable or FPC to ensure that each sub-electrode plate independently acquires signals. The touch film 1 is sandwiched between the cover plate 2 and the mounting bracket 3. The cover plate 2 is provided with a corresponding transparent or semi-transparent display window to facilitate the transmission of the display light source while protecting the toothed edge structure from direct contact.

[0032] In one embodiment, the tooth tips or valleys of the tooth profile are either zigzag or arc-shaped. This arc-shaped or zigzag transition of the tooth profile reduces the meshing impact between adjacent sub-electrode plates, making the tooth profile fit more smoothly and reducing the risk of jamming and wear.

[0033] In one embodiment, the tooth tip of the tooth profile is a polygonal shape, and the tooth profile is composed of two intersecting straight lines with an obtuse angle transition at the intersection. This polygonal tooth tip mates with the tooth valley of the adjacent sub-electrode sheet, and achieves smooth meshing through the transition surface of the polygonal line during relative movement, reducing meshing impact, and the tooth tip or tooth valley of the tooth profile is polygonal.

[0034] In another embodiment, the tooth valley of the tooth profile is arc-shaped, and the tooth profile adopts a circular arc curve transition. The radius R of the circular arc curve is determined according to the material thickness and the fit clearance.

[0035] Furthermore, the zigzag or arc-shaped tooth profile can be formed through processes such as stamping dies, wire cutting, or CNC milling.

[0036] In one embodiment, such as Figure 2 As shown, the touch diaphragm 1 has a strip-shaped structure, with multiple sub-electrodes arranged at intervals along a straight trajectory. The strip-shaped touch diaphragm 1 is suitable for linear sliding operations. The regular arrangement of electrodes facilitates the identification of the sliding direction, improves the accuracy of the sliding trajectory determination and the response speed, and is suitable for linear adjustment functions such as temperature and gear level.

[0037] Specifically, the touch film 1 has a strip-shaped structure, and multiple sub-electrode sheets are arranged at equal intervals along a straight trajectory to form a one-dimensional touch sensing area.

[0038] Specifically, the sliding direction is determined by collecting the sequence of continuous touch points during the sliding process and combining the triggering order and time interval of adjacent sub-electrodes, such as sliding forward, sliding backward, sliding left, and sliding right. The control device can then perform corresponding parameter adjustments or function switching based on the recognition results.

[0039] In one embodiment, such as Figure 3 As shown, the touch diaphragm 1 has a ring structure, with multiple sub-electrode sheets arranged at intervals along a ring trajectory. The ring structure of the touch diaphragm 1 enables continuous circumferential sliding operations, facilitating accurate identification of rotation direction and sliding amplitude, and improving the smoothness and resolution of operations such as ring menus and knob adjustments.

[0040] Specifically, the touch diaphragm 1 has a ring structure, with multiple sub-electrode sheets arranged at equal intervals along the ring trajectory to form a closed circumferential touch sensing area. By collecting the sequence of sub-electrode sheets triggered in sequence during the sliding process, and combining the circumferential changes in the triggering sequence, the rotation direction and displacement of the sliding are determined, and the corresponding function adjustment or state switching is performed accordingly to identify the sliding direction, such as clockwise sliding and counterclockwise sliding.

[0041] In one embodiment, such as Figure 4 As shown, the touch film 1 includes a protective layer 11, a pattern layer 12, a base layer 13, a light-shielding layer 14, an adhesive layer 15, and a release layer 16 arranged in sequence. The sequential arrangement of these functional layers allows them to support each other during production and use, maintaining the overall flatness and stability of the touch film 1 and preventing warping, delamination, or deformation.

[0042] Specifically, the protective layer 11 is made of transparent and wear-resistant polycarbonate (PC) or polyester (PET) film, and is used to protect the underlying pattern layer 12 from scratches and contamination. The pattern layer 12 is formed on the transparent conductive film by screen printing or etching to create touch electrode patterns and wires. The base layer 13 uses a transparent PET film as a carrier layer, and is used to provide mechanical support for the pattern layer 12 and maintain its flatness. The light-shielding layer 14 is used to coat the base layer 13 or the pattern layer 12 with opaque ink to shield the electrodes and wiring. The adhesive layer 15 uses transparent optical (OCA) or pressure-sensitive adhesive to firmly fix the touch film 1 to the device surface. The release layer 16 is a disposable protective film that is removed before installation to expose the adhesive layer 15.

[0043] In one embodiment, the touch film 1 further includes a reinforcing layer 17, a conductive carbon layer 18, and a buffer layer 19. The reinforcing layer 17 is attached to the tail area of ​​the base layer 13 facing the pattern layer 12, and the buffer layer 19 and the conductive carbon layer 18 are respectively attached to the tail areas of the base layer 13 facing the light-shielding layer 14, with the buffer layer 19 and the conductive carbon layer 18 disposed adjacent to each other. In this way, the tail area of ​​the touch film 1 has higher mechanical strength and deformation resistance when repeatedly inserted, removed, bent, or subjected to force, reducing the risk of breakage and warping.

[0044] Specifically, the reinforcing layer 17 is used to enhance the overall support of the tail belt area and prevent the base layer 13 from cracking; the conductive carbon layer 18 is used to form a stable, low-impedance electrical connection between the tail belt and the external connection terminal, reducing the probability of poor contact; the buffer layer 19 is located at the end of the tail belt area, and the buffer layer 19 is used to absorb local impact force and stress concentration, and protect the conductive carbon layer 18 and the tail belt welding point from peeling or damage.

[0045] In one embodiment, the reinforcing layer 17 is made of polyester (PET) or polyimide (PI) material and is attached to the tail area of ​​the base layer 13 by hot pressing or adhesive bonding, located on the side near the pattern layer 12, to enhance the tensile strength and bending resistance of the tail strip. The conductive carbon layer 18 is formed in the tail area near the light-shielding layer 14 by screen printing carbon paste, for contacting and conducting electricity with external sockets or connection terminals. The buffer layer 19 is located adjacent to the conductive carbon layer 18, and can be made of flexible foam or elastomer. It is fixed to the end of the tail area of ​​the base layer 13 by adhesive bonding to alleviate local stress concentration under external force. In the production process, the pattern layer 12 and the light-shielding layer 14 are first formed on the base layer 13, then the reinforcing layer 17 is sequentially attached, the conductive carbon layer 18 is printed, the buffer layer 19 is attached, and finally the adhesive layer 15 and the release layer 16 are laminated.

[0046] In one embodiment, the cover plate 2 and the touch diaphragm 1 are spaced apart. This reduces the direct mechanical pressure of the cover plate 2 on the touch diaphragm 1, avoiding interference to the touch sensing area due to assembly errors or external pressure; the spaced structure can reduce the direct electrostatic coupling of the cover plate 2 surface to the touch diaphragm 1, thereby reducing the probability of accidental touches or sensitivity drift.

[0047] In one embodiment, a gap is provided between the cover plate 2 and the touch diaphragm 1, which is fixed by a plastic frame or spacer post, and the gap area is an air layer. The sensing electrodes of the touch diaphragm 1 adjust the sensing threshold according to the gap distance to ensure that the signal response is stable and without delay when a touch operation is performed above the cover plate 2.

[0048] Specifically, the gap between the cover plate 2 and the touch film 1 is 4mm-6mm.

[0049] In one embodiment, the space between the cover plate 2 and the touch film 1 is filled with a light-transmitting medium.

[0050] In one embodiment, the touch switch assembly further includes a display light source electrically connected to the touch diaphragm 1. The display light source is positioned on the side of the control circuit board 4 facing the cover plate 2, allowing the light emitted by the display light source to pass sequentially through the touch diaphragm 1 and the cover plate 2. Thus, the light from the display light source can effectively and uniformly pass through the touch diaphragm 1 and the cover plate 2, achieving clear and bright visual indication and improving the user's operational feedback experience. The electrical connection between the display light source and the touch diaphragm 1 enhances the system integration and response speed of the assembly. The light, filtered layer by layer by the touch diaphragm 1 and the cover plate 2, reduces ambient light interference and glare, improving the stability and visibility of the display.

[0051] Specifically, the display light source is fixedly installed on the side of the control circuit board 4 facing the cover plate 2. The display light source is a surface-mount LED, and the emission color of the display light source can be selected as monochrome, dual-color, or full-color according to application requirements. The emitting surface of the display light source faces the cover plate 2.

[0052] Specifically, the touch film 1 has a light-transmitting area at the position corresponding to the display light source. This light-transmitting area can be achieved by forming an opening or a light-transmitting pattern in the pattern layer 12 or the light-shielding layer 14. The cover plate 2 also has a light-transmitting area at the position corresponding to the display light source. This light-transmitting area can be transparent or semi-transparent. The display light source is fixed to the surface of the control circuit board 4 by soldering and connected to the conductive lines of the control circuit board 4. The control circuit board 4 is fixedly connected to the mounting bracket 3. The display light source is located in the opening or hollow area of ​​the mounting bracket 3, so that the emitted light can pass through the touch film 1 and the cover plate 2 without obstruction, and finally appear as visible light on the outer surface of the cover plate 2.

[0053] Specifically, the number and arrangement of the display light sources are matched with the touch film 1.

[0054] In one embodiment, such as Figure 5 and 6 As shown, the cover plate 2 includes a display panel 21, an outer bracket 22, and an inner bracket 23. The outer bracket 22 is fixedly connected to the display panel 21, and the inner bracket 23 is located on the side of the outer bracket 22 away from the display panel 21 and is fixedly connected to the outer bracket 22. By fixing the outer bracket 22 to the display panel 21, the display panel 21 can be securely installed, preventing deformation or shaking of the display area. The inner bracket 23 is located on the side of the outer bracket 22 away from the display panel 21 and is fixedly connected to the outer bracket 22, which enhances the rigidity and durability of the overall structure, effectively disperses and bears external mechanical stress, and improves the impact resistance and service life of the cover plate 2.

[0055] Specifically, the display panel 21 is a glass plate with a flat outer surface. The inner surface of the display panel 21 can be printed or coated to form decorative patterns or functional markings as needed. The edges of the display panel 21 are adapted to the mounting structure of the outer bracket 22.

[0056] Specifically, the outer bracket 22 is a steel bracket, and its shape matches the boundary shape of the display panel 21. The inner side of the outer bracket 22 forms a step or pressing edge structure for supporting and positioning the display panel 21. The outer bracket 22 is fixedly connected to the edge of the display panel 21 by screws, riveting, welding or bonding.

[0057] Specifically, the inner bracket 23 is a plastic bracket, and the material of the inner bracket 23 can be ABS, PC+ABS alloy, nylon, or other engineering plastics. The inner bracket 23 is manufactured using injection molding. The inner bracket 23 is located on the side of the outer bracket 22 opposite to the display panel 21. The outer edge of the inner bracket 23 contacts the inner side of the outer bracket 22 and is fixed to the outer bracket 22 by means of clips, screws, or ultrasonic welding. The inner side of the inner bracket 23 forms mounting positions or mounting grooves for mounting the touch film 1, mounting bracket 3, and control circuit board 4. The dimensions of the mounting positions are machined according to the external dimensions of the components to be mounted to ensure reasonable assembly clearances.

[0058] Specifically, the display panel 21, the outer bracket 22, and the inner bracket 23 form an integrated cover plate 2 structure after assembly. The outer bracket 22 is used to support and fix the periphery of the display panel 21, while the inner bracket 23 is used to provide an installation and positioning reference for the internal components.

[0059] The assembly process of the touch switch assembly in this application embodiment is described below with reference to a specific application scenario: S1, the touch diaphragm 1 is fixedly installed in the inner mounting groove of the mounting bracket 3, the touch diaphragm 1 is fixedly connected to the mounting bracket 3, and the tail of the touch diaphragm 1 is led out through the lead wire channel of the mounting bracket 3; S2, fix the mounting bracket 3 to the cover plate 2 so that the touch film 1 faces the cover plate 2, and fix the cover plate 2 to the mounting bracket 3. S3, fix the control circuit board 4 on the side of the mounting bracket 3 away from the touch diaphragm 1, and connect the control circuit board 4 to the tail of the touch diaphragm 1 in an electrically connected manner. S4, a display light source is installed on the side of the control circuit board 4 facing the cover plate 2, so that the display light source corresponds to the light-transmitting area of ​​the touch film 1.

[0060] The following describes the working process of the touch switch component in the embodiments of this application, with reference to specific application scenarios: S1, when the user's finger approaches or touches the outer surface of the cover plate 2, the touch diaphragm 1 achieves air-to-air capacitive coupling sensing through the cover plate 2, and the control circuit board 4 collects the capacitance change signal of the sub-electrode sheet in the touch diaphragm 1. S2, control circuit board 4 collects the touch position coordinates (X1 / Y1) of the first trigger, and continuously collects the subsequent touch position coordinates (Xn / Yn) within a preset time window. S3, determine whether the touch action is continuous. If continuous coordinate changes are detected within the time window, proceed to direction recognition; if it is triggered only once or is not continuous, clear the initial position record. S4, determine the sliding direction based on the coordinate change sequence of continuous touch points, control the circuit board 4 to drive the display light source to work, and present a light prompt at the corresponding position on the outer surface of the cover plate 2, and light up the display light source in front of the sliding direction in advance to guide the sliding operation; S5, when the sliding action corresponds to the function adjustment of the steam oven, the control circuit board 4 outputs control commands according to the sliding direction and displacement.

[0061] The following describes specific embodiments of this application based on the above technical solution.

[0062] Example 1 Please see Figure 1-2 This embodiment provides a touch switch assembly, which includes a cover plate 2, a touch diaphragm 1, a mounting bracket 3, and a control circuit board 4. The cover plate 2 and the mounting bracket 3 are fixedly connected, and the touch diaphragm 1 is sandwiched between the cover plate 2 and the mounting bracket 3. The touch diaphragm 1 is electrically connected to the control circuit board 4. The touch diaphragm 1 includes multiple sub-electrodes, which are spaced apart along a preset direction. At least one end of each sub-electrode has a concave-convex structure, and the concave-convex structures of adjacent sub-electrodes are engaged and spaced apart from each other. The concave-convex structure has a toothed profile with alternating tooth tips and tooth valleys. The tooth tips of the sub-electrodes engage with the tooth valleys of adjacent sub-electrodes.

[0063] The touch film 1 includes multiple sub-electrode sheets arranged at intervals along a preset trajectory, each sub-electrode sheet having an edge processed into a serrated profile. The tips or valleys of the serrated profile are zigzag-shaped. The touch film 1 has a strip-shaped structure, with multiple sub-electrode sheets arranged at intervals along a straight trajectory. The touch film 1 includes a protective layer 11, a pattern layer 12, a base layer 13, a light-shielding layer 14, an adhesive layer 15, and a release layer 16 arranged sequentially. The touch film 1 also includes a reinforcing layer 17, a conductive carbon layer 18, and a buffer layer 19; the reinforcing layer 17 is attached to the tail area of ​​the base layer 13 facing the pattern layer 12, and the buffer layer 19 and the conductive carbon layer 18 are respectively attached to the tail areas of the base layer 13 facing the light-shielding layer 14, with the buffer layer 19 and the conductive carbon layer 18 arranged adjacent to each other. The cover plate 2 is spaced apart from the touch film 1.

[0064] The touch switch assembly also includes a display light source, which is electrically connected to the touch diaphragm 1. The display light source is located on the side of the control circuit board 4 facing the cover plate 2, so that the light emitted by the display light source can pass through the touch diaphragm 1 and the cover plate 2 in sequence. The cover plate 2 includes a display panel 21, an outer bracket 22, and an inner bracket 23; the outer bracket 22 is fixedly connected to the display panel 21, and the inner bracket 23 is located on the side of the outer bracket 22 away from the display panel 21 and is fixedly connected to the outer bracket 22.

[0065] Example 2 See Figure 3 The similarities between Embodiment 2 and Embodiment 1 will not be repeated here. The difference between Embodiment 2 and Embodiment 1 is that the touch film 1 has a ring structure and multiple sub-electrode sheets are arranged at intervals along the ring track.

[0066] The above-disclosed embodiments are merely several preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A touch-sensitive switch assembly, characterized in that, The touch switch assembly includes a cover plate (2), a touch diaphragm (1), a mounting bracket (3), and a control circuit board (4). The cover plate (2) and the mounting bracket (3) are fixedly connected, the touch film (1) is sandwiched between the cover plate (2) and the mounting bracket (3), and the touch film (1) is electrically connected to the control circuit board (4); The touch film (1) includes a plurality of sub-electrode sheets, which are spaced apart along a preset direction, and at least one end of each sub-electrode sheet is provided with a concave-convex structure, wherein the concave-convex structures of two adjacent sub-electrode sheets are matched and spaced apart from each other.

2. The touch switch assembly according to claim 1, characterized in that, The concave-convex mechanism has a toothed profile, which is provided with alternating tooth tips and tooth valleys. The tooth tips of the sub-electrode sheet are matched with the tooth valleys of the adjacent sub-electrode sheet.

3. The touch switch assembly according to claim 2, characterized in that, The tooth tips or valleys of the tooth-shaped profile are either zigzag or arc-shaped.

4. The touch switch assembly according to any one of claims 1-3, characterized in that, The touch film (1) has a strip structure, and multiple sub-electrode sheets are arranged at intervals along a straight trajectory.

5. The touch switch assembly according to any one of claims 1-3, characterized in that, The touch film (1) has a ring structure, and multiple sub-electrode sheets are arranged at intervals along the ring trajectory.

6. The touch switch assembly according to any one of claims 1-3, characterized in that, The touch film (1) includes a protective layer (11), a pattern layer (12), a base layer (13), a light-shielding layer (14), an adhesive layer (15), and a release layer (16) arranged in sequence.

7. The touch switch assembly according to claim 6, characterized in that, The touch film (1) also includes a reinforcing layer (17), a conductive carbon layer (18), and a buffer layer (19). The reinforcing layer (17) is attached to the tail area of ​​the base layer (13) facing the pattern layer (12), the buffer layer (19) and the conductive carbon layer (18) are respectively attached to the tail area of ​​the base layer (13) facing the light-shielding layer (14), and the buffer layer (19) and the conductive carbon layer (18) are arranged adjacent to each other.

8. The touch switch assembly according to any one of claims 1-3, characterized in that, The cover plate (2) and the touch film (1) are spaced apart.

9. The touch switch assembly according to any one of claims 1-3, characterized in that, The touch switch assembly also includes a display light source, which is electrically connected to the touch diaphragm (1). The display light source is located on the side of the control circuit board (4) facing the cover plate (2) so that the light emitted by the display light source can pass through the touch diaphragm (1) and the cover plate (2) in sequence.

10. The touch switch assembly according to any one of claims 1-3, characterized in that, The cover plate (2) includes a display panel (21), an outer bracket (22) and an inner bracket (23); The outer bracket (22) is fixedly connected to the display panel (21), and the inner bracket (23) is disposed on the side of the outer bracket (22) away from the display panel (21) and the inner bracket (23) is fixedly connected to the outer bracket (22).

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