Switch assembly for household appliancesTechnical Field
The utility model relates to the field of household appliances, in particular to a switch assembly for a household appliance.
Background
The traditional household appliance switch generally adopts a mechanical key switch, and the switch is normally switched on and off by adopting a mode of combining a mechanical structure and an electronic circuit, for example, the mechanical key switch structure is disclosed in Chinese patent application No. CN201310302603.2 (bulletin No. CN 103400713A), chinese patent application No. CN200420049305.3 (bulletin No. CN 2702209Y), a switch fixing device of a range hood, a range hood provided with the device, a mounting and fixing structure of a Chinese patent application No. CN200820208825.2 (bulletin No. CN 201335444Y), a European range hood switch and the like. The mechanical switch has more or less gaps with the main body of the household appliance in structure, is easily influenced by environmental factors such as temperature, humidity, dust and the like, especially in the environment of a range hood, kitchen with large oil smoke and humidity, is easy to cause problems after long-time use, and thus, the normal use of the switch is influenced.
At present, some household appliances also adopt capacitive induction type switches, and most of induction parts of the type of switches adopt sheet stainless steel induction rings or induction buttons, for example, the switch structure is disclosed in Chinese patent application No. CN201120564221.3 (grant bulletin No. CN 202385078U) of electronic touch type switch of range hood. The structure has the advantages that the touch surface of the induction ring is uneven, the contact surface is small, the induction ring is easy to deviate from the corresponding key area, the keys are inaccurate, the performance of the capacitive touch keys is unstable, and faults are easy to occur in the use process.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a switch assembly with stable performance for a household appliance, in particular to an appliance for a kitchen, and particularly relates to a range hood and the like.
The technical scheme adopted for solving the technical problems is as follows: the switch component for the household appliance is arranged on the control panel and comprises a switch cover, a liquid crystal screen controller and an induction film, wherein the induction film is fixed on the back surface of the control panel, so that an induction area is formed at the corresponding position of the front surface of the control panel, and the liquid crystal screen controller is arranged between the switch cover and the induction film; the liquid crystal display panel is characterized by further comprising a frame-shaped sealing seat and a sealing ring arranged on the sealing seat, wherein the sealing seat is fixed on the back surface of the control panel and surrounds the periphery of the induction film, the switch cover is arranged on the liquid crystal display panel controller and is connected with the panel through a fastener, and the periphery of the bottom of the switch cover is abutted against the sealing seat through the sealing ring.
Preferably, the bottom periphery of the switch cover extends outwards to form a connecting convex ring, the sealing ring is provided with a U-shaped first annular groove for embedding the connecting convex ring, and the sealing seat is provided with a U-shaped second annular groove for embedding the sealing ring. Namely, a U-shaped connecting structure is formed among the bottom of the switch cover, the sealing ring and the sealing seat, the contact area of the connecting structure is large, and the soft and hard materials are clamped layer by layer, so that better oil-proof and waterproof effects can be achieved.
Preferably, a flange extending outwards is arranged on the rear end face of the sealing seat along the length direction of the control panel, and a drainage groove is formed between the flange and the control panel. After the range hood is used for a long time, oil and water can be collected in the inner cavity and the inner wall, and the drainage groove is designed to enable the oil and the water to flow along the two sides of the switch assembly under the action of gravity, so that the oil and the water cannot flow forward or permeate into the switch assembly.
Preferably, the switch assembly further comprises a first switch bracket and a second switch bracket which are fixed on the control panel, wherein the first switch bracket and the second switch bracket are plate-shaped, the first switch bracket is arranged at one end of the sealing seat, one end of the first switch bracket is connected with the switch cover and is provided with a first mounting hole through which the fastener penetrates, one end of the second switch bracket is provided with a U-shaped recess for embedding the other end of the sealing seat, two sides of the recess are respectively provided with a mounting seat connected with the switch cover, and the mounting seat is provided with a second mounting hole through which the fastener penetrates. The switch cover and the control panel are firmly connected, so that the mounting structure of the switch assembly is stable.
Further, the first switch support sets up the rear end at the seal seat, and the other end of this first switch support extends along the perpendicular direction with control panel and forms the fender liquid board that is parallel with the seal seat, the second switch support sets up in the front end of seal seat, and this second switch support other end is buckled and is formed the protection casing of enclosing and establish at the switch cover periphery. The arrangement of the liquid baffle can lead the water from top to bottom to the two sides of the switch assembly by the first switch bracket, prevent the water from entering the inside of the switch assembly, and isolate the water vapor from bottom to top by the protective cover.
Still further, for making the fender liquid effect of first switch support better, the cross-section of first switch support is the U type, and its inside guiding gutter that extends along control panel length direction that forms, the both ends of this guiding gutter are towards the guiding gutter respectively.
Preferably, the through holes for the fasteners to pass through are respectively provided with a metal protection seat, and the fasteners sequentially pass through the metal protection seat and the through holes on the switch cover and are respectively connected with the mounting seats on the first switch bracket or the second switch bracket. The switch cover is generally made of plastics, and the fastening piece is generally a metal piece, so that the metal protection seat is arranged in order to avoid breakage of the switch cover due to insufficient strength after the switch cover is connected with the fastening piece, and the metal protection seat can be arranged on the switch cover in an adhering manner.
Further, a plurality of mounting lugs which extend outwards and are in one-to-one correspondence with the fasteners are arranged on the periphery of the switch cover, and the through holes are respectively formed in the mounting lugs.
Preferably, the fastening pieces are screws and are four, two of the fastening pieces are uniformly distributed at one end of the switch cover and are respectively connected with the first switch bracket, and the remaining two fastening pieces are respectively connected with the two mounting seats. The switch assembly can be installed through four screws, and the switch assembly is convenient to install and maintain.
Preferably, the seal ring is made of soft oil-proof rubber. The switch cover and the sealing seat can be tightly connected, so that the sealing effect of the switch assembly is improved.
Compared with the prior art, the utility model has the advantages that: when a user touches an induction area on the control panel, a coupling capacitance is formed between a finger and an induction film, the liquid crystal screen controller accurately calculates the position of a touch point by detecting the change of the capacitance of the induction film, and then the operation corresponding to the pressing of a key by the touch point is executed; in addition, the control panel and the range hood body form a sealing cavity, so that a first sealing line is formed, the sealing seat, the sealing ring and the periphery of the bottom of the switch cover are in sealing contact with the sealing seat through the sealing ring, the switch assembly and the control panel form a sealing structure, steam and oil smoke can be effectively prevented from penetrating, a second sealing line is formed, the IP 6-level protection effect is achieved, and the stability of the performance of the switch assembly is further guaranteed.
Drawings
FIG. 1 is a schematic diagram of a switch assembly according to an embodiment of the present utility model;
FIG. 2 is an exploded view of a switch assembly according to an embodiment of the present utility model;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 4 is an enlarged view of section i of fig. 2.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 to 4, a switch assembly for a home appliance is provided on a control panel 1, and includes a switch cover 2, a liquid crystal display controller 9, and a sensing film 3, wherein the sensing film 3 is fixed on the back surface of the control panel 1, and a sensing area is formed at a corresponding position of the front surface of the control panel 1, and a switch cover 21 is provided on the switch cover 2. In this embodiment, the household appliance is a range hood, and the size of the sensing film 3 is 3 to 6 inches, so the size of the sensing area is 3 to 6 inches. When a user touches the sensing area on the control panel 1, a coupling capacitance is formed between the finger and the sensing film 3, and the liquid crystal display controller 9 accurately calculates the position of the touch point by detecting the change of the capacitance of the sensing film 3, so as to execute the operation corresponding to the pressing of the touch point. In this embodiment, the sensing film 3 is connected to the lcd controller 9 through a flat cable (not shown), so that the lcd controller 9 is offset without causing inaccurate or invalid keys, thereby ensuring the operation performance of the switch assembly.
The switch assembly further comprises a frame-like sealing seat 4, a sealing ring 8 arranged on the sealing seat 4, and a first switch bracket 5 and a second switch bracket 6 fixed on the control panel 1. The sealing seat 4 is fixed on the back of the control panel 1 and is arranged around the periphery of the sensing film 3, the switch cover 2 is covered on the liquid crystal display controller 9 and is connected with the panel 1 through a fastener 10, and the bottom periphery of the switch cover 2 is in sealing contact with the sealing seat 4 through a sealing ring 8.
In this embodiment, in order to make the switch cover 2 and the sealing seat 4 form a tighter connection, so as to ensure the sealing effect of the switch assembly, the bottom periphery of the switch cover 2 extends outwards to form the connection convex ring 23, the sealing ring 8 is provided with a U-shaped first ring groove 81 in which the connection convex ring 23 is embedded, and the sealing seat 4 is provided with a U-shaped second ring groove 43 in which the sealing ring 8 is embedded. The sealing ring 8 in the embodiment is made of soft oil-proof rubber, so that the clamping of the hard material and the soft material can play a better role in oil proofing and water proofing. In addition, after the range hood is used for a long time, oil and water can be collected in the inner cavity and the inner wall, so that the flange 41 extending outwards is arranged on the rear end surface of the sealing seat 4 along the length direction of the control panel 1, and the drainage groove 42 for oil and water to flow through is formed between the flange 41 and the control panel 1, so that the oil and the water can flow along the two sides of the switch assembly under the action of gravity, and can not flow forward or permeate into the switch assembly.
The first switch bracket 5 and the second switch bracket 6 are both plate-shaped, wherein the first switch bracket 5 is disposed at one end of the sealing seat 4, and one end of the first switch bracket 5 is connected to the switch cover 2 and is provided with a first mounting hole 53 through which the fastener 10 passes. Specifically, in this embodiment, the first switch bracket 5 has a U-shaped cross section, and a diversion trench 52 extending along the length direction of the control panel 1 is formed in the first switch bracket, and two ends of the diversion trench 52 face two ends of the diversion trench 42 respectively. The U-shaped recess 61 for embedding the other end of the sealing seat 4 is provided at one end of the second switch bracket 6, the mounting seats 62 connected with the switch cover 2 are respectively provided at two sides of the recess 61, and the second mounting holes 621 penetrating the fasteners 10 are provided on the mounting seats 62, so that the switch cover 2 is firmly connected with the control panel 1, and the mounting structure of the switch assembly is stable. Further, the first switch bracket 5 is disposed at the rear end of the sealing seat 4, the other end of the first switch bracket 5 extends along the direction perpendicular to the control panel 1 to form a liquid baffle 51 parallel to the sealing seat 4, the second switch bracket 6 is disposed at the front end of the sealing seat 4, and the other end of the second switch bracket 6 is bent to form a protective cover 63 surrounding the periphery of the switch cover 2. The liquid baffle 51 can lead the water from top to bottom to the two sides of the switch assembly by the first switch bracket 5, prevent the water from entering the inside of the switch assembly, and the protective cover 63 can isolate the water vapor from bottom to top. Here, the rear end and the front end of the seal seat 4 are described with reference to the control panel 1.
In this embodiment, the number of the fasteners 10 is four, two of the fasteners are uniformly distributed at one end of the switch cover 2 and are respectively connected with the first switch bracket 5, and the remaining two fasteners are respectively connected with the two mounting seats 62, that is, the installation of the switch assembly can be completed through four screws, so that the installation and maintenance of the switch assembly are facilitated.
Since the switch cover 2 is generally made of plastic, and the fastening members 10 are generally metal members, in order to avoid the switch cover 2 from being broken due to insufficient strength after being connected with the fastening members 10, the through holes 24 of the switch cover 2 through which the fastening members 10 pass are respectively provided with a metal protection seat 22, and each fastening member 10 sequentially passes through the metal protection seat 22 and the through holes 24 of the switch cover 2 to be connected with the mounting seat 62 of the first switch bracket 5 or the second switch bracket 6. The metal protective base 22 can be arranged on the switch cover 2 by means of adhesive bonding. Further, four outwardly extending mounting lugs 22 are provided on the outer periphery of the switch cover 2 in one-to-one correspondence with the fasteners 10, and the through holes 24 are provided in the respective mounting lugs 22.
In summary, the control panel 1 and the range hood body form a sealing cavity, so as to form a first sealing line, the sealing seat 4, the sealing ring 8 and the bottom periphery of the switch cover 2 are in sealing contact with the sealing seat 4 through the sealing ring 8, so that the switch assembly and the control panel 1 form a sealing structure, steam and oil smoke can be effectively prevented from penetrating into the sealing cavity, a second sealing line is formed, in addition, the first switch bracket 5 can guide water from top to bottom to two sides of the switch assembly, water is prevented from entering the switch assembly, and the second switch bracket 6 can isolate water vapor from bottom to top. Therefore, the switch assembly can achieve the IP 6-level protection effect, oil water is effectively prevented from entering the switch assembly, and the performance stability of the switch assembly is ensured.