Integrated film key of electric cooker

Abstract

The utility model discloses an integrated film button of an electric cooker, which comprises a structure main body, the structure main body sequentially comprises a thermal insulation layer, a base layer and a panel from bottom to top, the panel is fixedly connected to the surface of the base layer, the base layer is provided with a circuit layer, the circuit layer is positioned in an interlayer of the base layer, and the thermal insulation layer is arranged on the surface of the base layer. The circuit layer is provided with a through hole and a pit, the through hole vertically penetrates through the circuit layer, a reinforcing member is arranged in the through hole, and two ends of the reinforcing member are embedded in the base layer; the base layer comprises a convex hull and a cavity formed in the convex hull, the covered edge of the convex hull is provided with a crease, the convex hull comprises a contact point and a metal elastic sheet, the thermal insulation layer comprises a thermal insulation plate and a thermal insulation coating, and the thermal insulation coating is arranged on the lower surface of the thermal insulation plate; the panel comprises a character layer and a hard layer. The double-layer heat insulation structure is resistant to high temperature, and the ultrasonic welding multi-layer structure is not prone to layering, firm, durable and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of membrane buttons, in particular to an integrated membrane button for an electric rice cooker. Background Art

[0002] With the development of science and technology, the functions of electronic devices are becoming increasingly rich. As an important component for realizing human-computer interaction in electronic devices, the performance and user experience of buttons are crucial. At present, the membrane buttons on the market are mainly made of ordinary plastic film materials, which are easy to deform in high temperature environments, resulting in button failure. In addition, traditional membrane buttons are prone to delamination after long-term use, which affects the touch and service life of the buttons. Therefore, a new type of membrane button is urgently needed to solve the above problems.

[0003] After searching, the patent with application number CN202321001022.0 is an integrated membrane switch for microwave oven, which includes a membrane switch body, a prompt light strip and a pressing block. The membrane switch body is bonded to the front end surface of the microwave oven body, and a membrane button is arranged on the surface of the membrane switch body; the prompt light strip is embedded and fixed in the pressing block, and the pressing block is located on the inner side of the membrane button. The patent is also provided with an adhesive layer. The multi-layer structure will be stratified by bonding due to being in a high temperature environment for a long time, affecting the use of the button, and the thinnest thermal insulation ceramic layer in its thermal insulation scheme can only reach 4.8mm. When used as the thermal insulation layer of the membrane button, the overall membrane button will be thicker, affecting the installation and use. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art solutions, the utility model provides an integrated membrane button for an electric rice cooker, which can effectively solve the problems raised by the background technology.

[0005] The utility model adopts the following technical solution to solve the technical problem: an integrated membrane button for an electric rice cooker, comprising a structural body, the structural body comprising a temperature-insulating layer, a base layer and a panel in order from bottom to top, the panel being fixedly connected to the surface of the base layer, the base layer being provided with a circuit layer, the circuit layer being located in the interlayer of the base layer, the circuit layer being provided with a through hole and a pit, the through hole vertically penetrating the circuit layer, a reinforcement piece being provided in the through hole, and both ends of the reinforcement piece being embedded in the base layer; the base layer comprising a convex hull and a cavity formed inside the convex hull, the rim of the convex hull being provided with a fold, the convex hull comprising a contact point and a metal spring sheet, the contact point and the metal spring sheet being arranged in the cavity, and the contact point being arranged at the concave part of the metal spring sheet; the temperature-insulating layer comprising a temperature-insulating plate and a temperature-insulating coating, the temperature-insulating coating being arranged on the lower surface of the temperature-insulating plate;

[0006] The panel comprises a text layer and a hard layer, wherein the hard layer is fixedly connected to the upper surface of the text layer.

[0007] Preferably, the thermal insulation layer, the base layer and the panel are fixedly connected by ultrasonic welding.

[0008] Preferably, the circuit layer is a double-layer circuit structure, and the circuit layer is provided with an anti-interference layer and an insulating layer, and the anti-interference layer and the insulating layer are arranged between the upper and lower layers of the circuit.

[0009] Preferably, the contact point is an inverted frustum-shaped metal contact point, and the material of the contact point includes at least one of a nickel-chromium alloy and an iron-chromium-aluminum alloy.

[0010] Preferably, the pit is arranged on the upper surface of the circuit layer, the concave shape of the pit fits the convex shape of the contact point, and the concave edge of the pit is a rounded structure.

[0011] Preferably, the thermal insulation board comprises at least one of an aerogel felt and a vacuum insulation board, the thermal insulation coating is a polyurethane coating, and the thickness of the thermal insulation board is between 1 mm and 3 mm.

[0012] Preferably, the panel is fixedly connected to the surface of the base layer by heat pressing.

[0013] Preferably, the hard layer is a transparent medium layer, and the hard layer includes at least one of a polycarbonate layer, a polyethylene terephthalate layer and a polymethyl methacrylate layer.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The thermal insulation layer includes a thermal insulation board and a thermal insulation coating. The thermal insulation board can effectively prevent heat transfer, thereby maintaining a constant temperature or achieving a certain temperature regulation effect.

[0016] The thermal insulation coating can effectively reflect the heat radiation of the rice cooker and prevent the heat from being transferred to the internal materials.

[0017] In addition, the thermal insulation coating can also form a protective film to prevent the intrusion of external heat and cold air, thereby maintaining a constant temperature inside the rice cooker.

[0018] The thermal insulation board includes at least one of an aerogel felt and a vacuum insulation board, and the thickness can be controlled between 1 mm and 3 mm while ensuring the thermal insulation effect.

[0019] The thermal insulation layer, the base layer and the panel are fixedly connected by ultrasonic welding. Ultrasonic welding does not require the use of any filling material or adhesive, and the connection is tight, which is also an environmentally friendly fixing connection method.

[0020] The double-layer thermal insulation structure of the utility model is resistant to high temperature, and the ultrasonically welded multi-layer structure is not easy to delaminate, is strong and durable, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the panel structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the circuit layer structure of the utility model;

[0024] Figure 4 This is a schematic diagram of the thermal insulation layer structure of the utility model;

[0025] Figure 5 It is a structural explosion diagram of the utility model.

[0026] Numbers in the figure:

[0027] 1-convex hull, 2-cavity, 3-contact point, 4-metal spring, 5-panel, 6-base layer, 7-thermal insulation layer, 8-crease, 9-circuit layer, 10-through hole, 11-reinforcement, 12-text layer, 13-hard layer, 14-anti-interference layer, 15-insulating layer, 16-thermal insulation board, 17-thermal insulation coating, 18-pit. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1-5 As shown, the utility model provides an integrated membrane button for an electric rice cooker, comprising a structural body, wherein the structural body comprises a temperature insulation layer 7, a base layer 6 and a panel 5 in sequence from bottom to top, wherein the panel 5 is fixedly connected to the surface of the base layer 6, wherein the base layer 6 is provided with a circuit layer 9, wherein the circuit layer 9 is located in the interlayer of the base layer 6, wherein the circuit layer 9 is provided with a through hole 10 and a pit 18, wherein the through hole 10 vertically penetrates the circuit layer 9, wherein a reinforcing member 11 is provided in the through hole 10, and wherein both ends of the reinforcing member 11 are embedded in the base layer 6.

[0030] The base layer 6 includes a convex bulge 1 and a cavity 2 formed inside the convex bulge 1, and the edge of the convex bulge 1 is provided with a fold 8. The convex bulge 1 includes a contact point 3 and a metal spring 4, and the contact point 3 and the metal spring 4 are arranged in the cavity 2. The cross-section of the metal spring 4 is consistent with the curvature of the cross-section of the convex bulge 1. The contact point 3 is arranged in the depression of the metal spring 4. The initial state of the metal spring 4 is not in contact with the circuit layer 9. When pressed, the edge of the metal spring 4 contacts the circuit layer 9 but the circuit is connected. When pressed hard, the contact point 3 of the metal spring 4 contacts the circuit layer 9 to form a circuit.

[0031] The contact point 3 can reduce the deformation degree of the metal spring 4 when the metal spring 4 is connected to the circuit, and prevent the metal spring 4 from being over-deformed and unable to recover to the initial state by itself.

[0032] When the key is pressed, the pit 18 is completely fitted with the contact point 3, and the material of the surface of the pit 18 includes at least one of a nickel-chromium alloy and an iron-chromium-aluminum alloy.

[0033] The thermal insulation layer 7 includes a thermal insulation plate 16 and a thermal insulation coating 17 . The thermal insulation coating 17 is disposed on the lower surface of the thermal insulation plate 16 .

[0034] The insulation board 16 mainly achieves temperature isolation and control by isolating or controlling air circulation. Specifically, the insulation board 16 is composed of an insulation layer, an isolation layer and a sealing layer. Through the cooperation of these layers, the insulation board 16 can effectively prevent heat transfer, thereby maintaining a constant temperature or achieving a certain temperature regulation effect.

[0035] The heat-insulating coating 17 mainly realizes the heat-insulating effect by reflecting and isolating the transfer of heat. It is usually composed of materials such as metal oxides and hollow microspheres, and can effectively reflect the heat radiation of the rice cooker to prevent the transfer of heat to the internal materials.

[0036] In addition, the temperature-insulating coating 17 can also form a protective film to prevent the invasion of external heat and cold air, thereby maintaining a constant temperature inside the rice cooker.

[0037] The panel 5 includes a text layer 12 and a hard layer 13 , and the hard layer 13 is fixedly connected to the upper surface of the text layer 12 .

[0038] The independent text layer 12 can prevent the printed ink from affecting the circuit layer 9 .

[0039] The thermal insulation layer 7, the base layer 6 and the panel 5 are fixedly connected by ultrasonic welding.

[0040] Ultrasonic welding does not require the use of any filler materials or adhesives, provides a tight connection, and is an environmentally friendly method of fixing and connecting.

[0041] The circuit layer 9 is a double-layer circuit structure, and is provided with an anti-interference layer 14 and an insulating layer 15 . The anti-interference layer 14 and the insulating layer 15 are arranged between the upper and lower circuit layers, and the two circuit layers 9 are connected through a through hole 10 .

[0042] The anti-interference layer 14 is a metal mesh, which effectively absorbs and reflects electromagnetic waves, reducing the interference of electromagnetic waves to other electronic devices;

[0043] The insulating layer 15 is made of plastic to prevent current from flowing between these parts or components, and can effectively block the passage of current to isolate the mutual interference between the upper and lower layers of circuits.

[0044] The contact point 3 is an inverted truncated cone-shaped metal contact, and the material of the contact point 3 includes at least one of a nickel-chromium alloy and an iron-chromium-aluminum alloy.

[0045] The above has good conductivity and anti-oxidation properties, and can still maintain stable performance in high temperature and corrosive environments, making the membrane keypad more stable.

[0046] The pit 18 is provided on the upper surface of the circuit layer 9 , the concave shape of the pit 18 fits the convex shape of the contact point 3 , and the concave edge of the pit 18 is a rounded structure.

[0047] The insulation board 16 at least includes one of an aerogel felt and a vacuum insulation board, the insulation coating 17 is a polyurethane coating, and the thickness of the insulation board 16 is between 1 mm and 3 mm.

[0048] The interior of the aerogel felt is a nano-scale porous structure with high porosity and small pore size, which can effectively block the circulation of air. At the same time, the aerogel felt has a low thermal conductivity and excellent thermal insulation performance. The thermal insulation performance of the vacuum insulation board far exceeds that of traditional thermal insulation materials. Its thermal conductivity can be as low as 0.005W / (m·K). Compared with traditional thermal insulation materials, the thermal insulation effect is improved by 5 to 8 times, and is even better than the more expensive new material aerogel. The thickness of the insulation board 16 is between 1 mm and 3 mm, which ensures a certain thermal insulation effect while reducing the thickness.

[0049] The panel 5 is fixedly connected to the surface of the base layer 6 by hot pressing.

[0050] Hot pressing can improve the mechanical properties of the material, such as strength, stiffness and durability, making the panel 5 more durable.

[0051] The hard layer 13 is a transparent medium layer, and the hard layer 13 at least includes one of a polycarbonate layer, a polyethylene terephthalate layer, and a polymethyl methacrylate layer.

[0052] The beneficial effects of the utility model are:

[0053] The thermal insulation layer 7 includes a thermal insulation board 16 and a thermal insulation coating 17. The thermal insulation board 16 can effectively prevent heat transfer, thereby maintaining a constant temperature or achieving a certain temperature regulation effect.

[0054] The thermal insulation coating 17 can effectively reflect the heat radiation of the rice cooker to prevent the heat from being transferred to the internal materials.

[0055] In addition, the thermal insulation coating 17 can also form a protective film to prevent the invasion of external heat and cold air, thereby maintaining a constant temperature inside the rice cooker.

[0056] The insulation board 16 includes at least one of an aerogel felt and a vacuum insulation board, and the thickness can be controlled between 1 mm and 3 mm while ensuring the insulation effect.

[0057] The thermal insulation layer 7, the base layer 6 and the panel 5 are fixedly connected by ultrasonic welding. Ultrasonic welding does not require the use of any filling material or adhesive, and the connection is tight, which is also an environmentally friendly fixing connection method.

[0058] The double-layer thermal insulation structure of the utility model is resistant to high temperature, and the ultrasonically welded multi-layer structure is not easy to delaminate, is strong and durable, and has strong practicality.

[0059] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An integrated membrane button for an electric rice cooker, characterized in that: The invention comprises a structural body, wherein the structural body comprises a temperature insulation layer, a base layer and a panel in order from bottom to top, wherein the panel is fixedly connected to the surface of the base layer, wherein the base layer is provided with a circuit layer, wherein the circuit layer is located in the interlayer of the base layer, wherein the circuit layer is provided with a through hole and a pit, wherein the through hole vertically penetrates the circuit layer, wherein a reinforcement piece is provided in the through hole, and wherein both ends of the reinforcement piece are embedded in the base layer; The base layer includes a convex hull and a cavity formed inside the convex hull, the convex hull has a fold on its edge, the convex hull includes a contact point and a metal spring, the contact point and the metal spring are arranged in the cavity, and the contact point is arranged at a concave part of the metal spring; The thermal insulation layer comprises a thermal insulation board and a thermal insulation coating, wherein the thermal insulation coating is arranged on the lower surface of the thermal insulation board; The panel comprises a text layer and a hard layer, wherein the hard layer is fixedly connected to the upper surface of the text layer.

2. The integrated membrane keypad for an electric rice cooker according to claim 1, characterized in that: The thermal insulation layer, the base layer and the panel are fixedly connected by ultrasonic welding.

3. The integrated membrane keypad for an electric rice cooker according to claim 2, characterized in that: The circuit layer is a double-layer circuit structure, and the circuit layer is provided with an anti-interference layer and an insulating layer, and the anti-interference layer and the insulating layer are arranged between the upper and lower layers of the circuit.

4. The integrated membrane keypad for an electric rice cooker according to claim 3, characterized in that: The contact point is an inverted truncated cone-shaped metal contact point, and the material of the contact point includes at least one of a nickel-chromium alloy and an iron-chromium-aluminum alloy.

5. The integrated membrane keypad for an electric rice cooker according to claim 4, characterized in that: The pit is arranged on the upper surface of the circuit layer, the concave shape of the pit fits the convex shape of the contact point, and the concave edge of the pit is a rounded structure.

6. The integrated membrane keypad for a rice cooker according to claim 1, characterized in that: The thermal insulation board includes at least one of an aerogel felt and a vacuum insulation board, the thermal insulation coating is a polyurethane coating, and the thickness of the thermal insulation board is between 1 mm and 3 mm.

7. The integrated membrane keypad for an electric rice cooker according to claim 1, characterized in that: The panel is fixedly connected to the surface of the base layer by heat pressing.

8. The integrated membrane keypad for an electric rice cooker according to claim 1, characterized in that: The hard layer is a transparent medium layer, and the hard layer at least includes one of a polycarbonate layer, a polyethylene terephthalate layer and a polymethyl methacrylate layer.

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