CN205336249U

CN205336249U - Touch key device

Info

Publication number: CN205336249U
Application number: CN201521040257.6U
Authority: CN
Inventors: 杨传全; 刘杰
Original assignee: FOSHAN SHUNDE DISTRICT HIGHWAY ELECTRONIC Co Ltd
Current assignee: FOSHAN SHUNDE DISTRICT HIGHWAY ELECTRONIC Co Ltd
Priority date: 2015-12-14
Filing date: 2015-12-14
Publication date: 2016-06-22
Anticipated expiration: 2025-12-14

Abstract

The utility model discloses a touch key device, including metal sheet, plastic slab, PCB board and control circuit, metal sheet, plastic slab and PCB board are arranged in proper order, and the upper surface of metal sheet is the plane, and the plastic slab is equipped with a plurality of through -holes, is equipped with a plurality of sensors on the PCB board, and the sensor corresponds the setting with the through -hole, and a plurality of sensors all are connected with the control circuit electricity. From this, prevent stockpiling of dirt etc. The convenient washing can extensively be arranged in multiple electrical apparatus, be equipped with a plurality of through -holes on the plastic slab, consequently, in touch during the metal sheet, when exogenic action during in the through -hole top, the small deformation of metal sheet emergence for distance between metal sheet and the PCB board diminishes, and the sensor detects the deformation back that changes, with signal transmission to control circuit, arouses that the inductance changes among the control circuit, has or not the button through control circuit discernment, thereby realizes that the button corresponds function, convenient to use.

Description

Touch key device

Technical field

This utility model belongs to appliance field, especially relates to a kind of touch key device。

Background technology

Mechanical key is adopted now for the button majority of electrical equipment, owing to there is gap between control panel and the button of mechanical key, so easily causing stockpiling of dirt or greasy dirt, and not easy cleaning。At present, occur in that partial touch formula button, but in actual use, touch-key poor effect, easily occur touching the phenomenons such as insensitive, therefore, less use in real life；And panel much can not adopt metal decking, easily occurring that button is ineffective in many circumstances, impact uses。

Utility model content

The purpose of this utility model is in that to provide a kind of touch key device, it is possible to solve at least one in the problems referred to above。

According to an aspect of the present utility model, provide a kind of touch key device, including metallic plate, plastic plate, pcb board and control circuit, metallic plate, plastic plate and pcb board are arranged in order, the upper surface of metallic plate is plane, and plastic plate is provided with multiple through hole, and pcb board is provided with multiple sensor, sensor and through hole are correspondingly arranged, and multiple sensors all electrically connect with control circuit。

The beneficial effects of the utility model are: the upper surface of metallic plate is plane, it is possible to prevent stockpiling of dirt etc., convenient cleaning, it is possible to be widely used in multiple electrical equipment；Plastic plate is provided with multiple through hole, therefore, when touching metallic plate, when External Force Acting is above through hole, metallic plate generation miniature deformation, distance between metallic plate and pcb board is diminished, and sensor transmits signals to control circuit after detecting that deformation changes, cause inductance change in control circuit, by control circuit identification with or without button, thus realizing button corresponding function, easy to use。

In some embodiments, each control circuit is corresponding with a sensor, and electrically connects。Thus, it is possible to facilitate each sensor sensing corresponding signal, it is prevented that signal disturbing。

In some embodiments, touch key device also includes display lamp, and display lamp is located on pcb board, and display lamp is corresponding with sensor。Thus, it is provided with display lamp, it is possible to facilitate the button in user identification work, improve the convenience used。

In some embodiments, plastic plate is provided with multiple positioning convex point, and positioning convex point is corresponding with display lamp。Thus, it is provided with positioning convex point, it is possible to facilitate the light of display lamp can pass through plastic plate。

In some embodiments, metallic plate is provided with multiple loophole, and loophole matches with positioning convex point。Thus, it is provided with loophole, it is possible to facilitate the location of metallic plate and plastic plate and fix, convenient installation, and facilitate the light of display lamp to penetrate。

In some embodiments, plastic plate is provided with angle, and pcb board is provided with the location hole corresponding with angle, and angle matches with hole, location。Thus, it is provided with angle, it is possible to facilitate the fixing of plastic plate and pcb board and coordinate, convenient installation。

In some embodiments, control circuit includes control chip, inductance and electric capacity, and inductance electrically connects with input with control chip after Capacitance parallel connection。Thus, when, after metallic plate generation miniature deformation, causing the change of inductance in control circuit, and then cause the frequency of parallel resonance and the change of amplitude, by the change identification of frequency and amplitude with or without button, easy to use。

Accompanying drawing explanation

Fig. 1 is the structural representation of touch key device of the present utility model；

Fig. 2 is the circuit diagram of control circuit in touch key device of the present utility model。

Detailed description of the invention

Below in conjunction with accompanying drawing, this utility model is described in further detail。

See figures.1.and.2: touch key device, including metallic plate 1, plastic plate 2, pcb board (Printedcircuitboard, printed circuit board (PCB)) 3 and control circuit 4, metallic plate 1, plastic plate 2 and pcb board 3 are arranged in order, plastic plate 2 is transparent ABS plate (Acrylonitrile-butdiene-styrene, acrylonitrile/butadiene/styrene copolymer plate), the upper surface of metallic plate 1 is plane, plastic plate 2 offers multiple through hole 21, pcb board 3 is provided with multiple sensor 5, sensor 5 and through hole 21 are correspondingly arranged, namely sensor 5 is positioned at the underface of through hole 21, multiple sensors 5 all electrically connect with control circuit 4。The quantity of through hole 21 and sensor 5 can the strong quantity of function as required carry out increasing or reducing。

Each control circuit 4 is corresponding with a sensor 5, and electrically connects。

Touch key device of the present utility model also includes display lamp 6, and display lamp 6 is located on pcb board 3, and display lamp 6 is corresponding with sensor 5, i.e. a corresponding display lamp 6 of sensor 5, and when corresponding sensor 5 senses signal, corresponding display lamp 6 is bright。

Plastic plate 2 is provided with multiple positioning convex point 22, and positioning convex point 22 and plastic plate 2 are integrated injection mo(u)lding structure, and positioning convex point 22 is corresponding with display lamp 6, and namely display lamp 6 is positioned at the lower section of positioning convex point 22。It is provided with positioning convex point 22, it is possible to facilitate the light of display lamp 6 through plastic plate 2。

Metallic plate 1 is provided with multiple loophole 11, and loophole 11 matches with positioning convex point 22, the through metallic plate 1 of loophole 11, and the light of display lamp 6 is transmitted by loophole 11, facilitates operator to use。Loophole 11 matches with positioning convex point 22, facilitates metallic plate 1 and plastic plate 2 secure fit；Wherein, after positioning convex point 22 coordinates with loophole 11, the top of positioning convex point 22 lower than or the upper surface of concordant metallic plate 1。After plastic plate 2 coordinates with metallic plate 1, it is adhesively fixed by a glue, loophole 11 place sealant pouring and sealing, it is prevented that dust, dirt etc. fall in loophole 11, facilitate the cleaning of metallic plate 1。

Plastic plate 2 is provided with angle 23, angle 23 and plastic plate 2 are integrated injection mo(u)lding structure, and pcb board 3 is provided with the location hole 31 corresponding with angle 23, and angle 23 matches with hole 31, location, angle 23 is positioned at the periphery of plastic plate 2, improves the stationarity of location。

Control circuit 4 includes control chip 41, inductance 42 and electric capacity 43, and wherein, the model of chip 41 is HIGWAY-C203G, and inductance 42 electrically connects with the input of control chip 41 with after electric capacity 43 parallel connection。Control chip 41 accesses 3.3V voltage, it is achieved the normal operation of chip 41。

Touch key device of the present utility model in use, touches metallic plate 1, and miniature deformation occurs metallic plate 1, and the distance that sensor 5 senses between metallic plate 1 and pcb board 3 diminishes, and sensor 5 transmits signal to control circuit 4。After distance between metallic plate 1 and pcb board 3 changes, causing the inductance in control circuit 4 to change, then cause the frequency of parallel resonance and the change of amplitude, chip 41 is by detecting the change identification operator whether button of this frequency and amplitude。

Above-described is only preferred implementation of the present utility model; it should be pointed out that, for the person of ordinary skill of the art, under the premise creating design without departing from this utility model; can also making some deformation and improvement, these broadly fall into protection domain of the present utility model。

Claims

1. touch key device, it is characterized in that, including metallic plate (1), plastic plate (2), pcb board (3) and control circuit (4), described metallic plate (1), plastic plate (2) and pcb board (3) are arranged in order, the upper surface of described metallic plate (1) is plane, described plastic plate (2) is provided with multiple through hole (21), described pcb board (3) is provided with multiple sensor (5), described sensor (5) and through hole (21) are correspondingly arranged, multiple described sensors (5) all electrically connect with control circuit (4)。

2. touch key device according to claim 1, it is characterised in that each described control circuit (4) is corresponding with a sensor (5), and electrically connects。

3. touch key device according to claim 1 and 2, it is characterized in that, also including display lamp (6), described display lamp (6) is located on pcb board (3), and described display lamp (6) is corresponding with sensor (5)。

4. touch key device according to claim 3, it is characterised in that described plastic plate (2) is provided with multiple positioning convex point (22), and described positioning convex point (22) is corresponding with display lamp (6)。

5. touch key device according to claim 4, it is characterised in that described metallic plate (1) is provided with multiple loophole (11), and described loophole (11) matches with positioning convex point (22)。

6. touch key device according to claim 1, it is characterized in that, described plastic plate (2) is provided with angle (23), described pcb board (3) is provided with the location hole (31) corresponding with angle (23), and described angle (23) matches with hole, location (31)。

7. touch key device according to claim 3, it is characterized in that, described control circuit (4) includes control chip (41), inductance (42) and electric capacity (43), and described inductance (42) electrically connects with input with control chip (41) after electric capacity (43) parallel connection。