CN200989816Y

CN200989816Y - Multipurpose electronic scale utilizing touch inductive keys

Info

Publication number: CN200989816Y
Application number: CN 200620015523
Authority: CN
Inventors: 朱惠忠; 阮永基; 李钫
Original assignee: TH LEAGUER SENSORY TECHNOLOGY (SHENZHEN) Co Ltd
Current assignee: TH LEAGUER SENSORY TECHNOLOGY (SHENZHEN) Co Ltd
Priority date: 2006-10-30
Filing date: 2006-10-30
Publication date: 2007-12-12
Anticipated expiration: 2016-10-30

Abstract

The utility model discloses a multipurpose electronic loadcell scales adopting a touching induction typed key-press, which mainly comprises a surface of the electronic loadcell scales (1), an induction key-press (2), an upper shell (3), a display unit (4), an electronic module (5), a lower shell (6), a weighting sensor (7) and an electric power source (8). The utility model adopts the touching induction typed key-press to replace the traditional mechanical key-press, a contain-grid electrode array is arranged below a panel of the key-press, the position and the definition of the key-press are printed on the corresponding position on the panel; the parameter of the segmented capacitance is changed through that the corresponding position of key-press is touched by the fingers, thus realizing the corresponding key-press action after circuit detecting. The utility model eliminates the hidden trouble of fatigue failure of the mechanical key-press, thus enhancing the reliability of the system and prolonging the service life of the system; in addition, as the utility model can avoid punching holes in the shell, which makes the area of key-press and the correlative part of the shell smooth and continuous, makes the airproofing and the cleaning of the shell more convenient, and also provides more convenient choice for product molding and physical design.

Description

Adopt the multifunctional electronic scale of touch-induction-type button

Technical field

The utility model relates to a kind of multifunctional electronic scale, relates in particular to a kind of multifunctional electronic scale that adopts the touch-induction-type button.

Background technology

Electronic scales is used very extensive in commercial production, commodity transaction and schedule life, some multifunctional electronic scales can design and additional constitute various multifunctional electronic scales such as needed functions such as alleged calculation of price, standard component counting, material composition analyses except basic function of weighing.The feature operation of product or analysis instruction are carried out corresponding work by the computing machine that the keyboard operation that is provided with on the product inputs to internal system.

The input keyboard of multifunctional electronic scale of the prior art all adopts the mechanical type key combination to form, and is similar to the keyboard of common computing machine, and needs are without exception used the motion contact, and are commonly used as separate type keyswitch or combined film keyboard.Thereby make two electric pole short circuits of keyswitch form actuation of keys by pressing the motion contact.The common feature of this press-key structure is to use the moved fatigue lifetime and the wear-out life of contact of life-span to restrict, and is shorter relatively; On the other hand, actuation of keys is realized in moving motion contact owing to need press...with one's finger, therefore this mechanical type button need be from being exposed to outside the encapsulating housing of scale system with the contact of will move to the housing outer lead in the housing of electronic scales, after this serves as a mark with the film covering of flexibility again and seal.This structural design and sealing to system all brings some difficulty.

The utility model content

The purpose of this utility model is to provide a kind of multifunctional electronic scale that adopts the touch-induction-type button, it is introduced the electronic switching technology of often using in the modern electronic technology in the design of multifunctional electronic scale, thereby replaces the mechanical contact keyboard that uses in traditional multifunctional electronic scale.

The technical scheme in the invention for solving the above technical problem is, the keyboard pattern definite according to configuration design, design one and hold the grating array strake, this is held the grating array strake be attached to the housing of keyboard Designing position or the inside surface of the scale pan, the thick design of an appropriate section ancient piece of jade, round, flat and with a hole in its centre of the housing or the scale pan is held at button in the maximum distance of reaction of grid, guarantees that each button appearance grid in the array have enough induction sensitivity.Designing corresponding circuit changes the parameter of the key induced electric capacity on the finger touch keyboard and converts that switching signal is sent to subsequent conditioning circuit or single-chip microcomputer forms key command to.

The utility model becomes one to hold the grid structure traditional button two electrode design, be placed on below the face-piece of button correspondence position, when finger touch holds the surface of shell of grid switch correspondence position, induction causes that the parameter of the electric capacity that appearance grid and peripheral medium are formed changes, convert this variation to a switching signal input circuit and computer system by suitable processing of circuit again, form key command.

Compare with prior art, touch-induction-type keyboard multifunctional electronic weighing-appliance of the present utility model has following advantage: the touch-induction-type keyboard with no mechanical parts replaces the mechanical contact keyboard of using in traditional multifunctional electronic scale, avoided the keys deactivation that physical damage caused of motion contact, the reliability of system is strengthened greatly; On the other hand, when having exempted traditional mechanical type keyboard and having used inevitably by the lead-in wire needs outside housing in the housing, can avoid the exsertion part punching at housing, make that the Seal Design of scale body is easier, the while also provides more more novel selections for the moulded design of product.

Description of drawings

Fig. 1 is the structural formula intention of embodiment 1 touch-induction-type keyboard glass nutrition scale of the present utility model;

Fig. 2 is the system principle diagram of embodiment 1 touch-induction-type keyboard glass nutrition scale of the present utility model;

Fig. 3 is the circuit theory diagrams of the used matrix form keyboard scan of embodiment 1 touch-induction-type keyboard glass nutrition scale of the present utility model;

Fig. 4 is the synoptic diagram that touch-induction-type of the present utility model holds grid button and circuit symbol.

Embodiment

Below in conjunction with the glass nutrition scale of embodiment 1 touch-induction-type keyboard shown in the drawings, the food nutrition scale of touch induction keyboard is described in further detail.

As shown in Figure 1, the glass nutrition scale of the utility model touch-induction-type keyboard comprises: grating array strake 2, upper casing 3, LCD display 4, electronic module 5, lower casing 6, LOAD CELLS 7, battery 8, battery cover 9, feet 10 are held in glass scale face 1, the induction of band keyboard screen printing pattern.Glass nutrition scale is the four-sensor supporting construction, and the total weight of scale body and testee acts on four LOAD CELLS 7, and LOAD CELLS 7 is supported on the table top by feet 10; The keyboard Designing position that grating array strake 2 is attached to the lower surface correspondence of glass scale face 1 is held in induction; There is an induction to hold grid below each corresponding button position, with corresponding key positions on the upper surface of finger touch glass scale face 1, appearance grid correspondingly are subjected to induction and cause that capacitance parameter changes, keyboard scan IC detects the capacitance parameter change location of this position, convert push button signalling output to, microcomputer is carried out corresponding actuation of keys after receiving push button signalling.Induction keyboard 2 function buttons are provided with more than three and three.

As shown in Figure 2, electronic module is made up of signal processing circuit, microcomputer, storer, touch induction keyboard sweep circuit.Battery 8 provides power supply for system works.

Please in conjunction with Fig. 1, shown in Figure 2, institute is surveyed food to be placed on the glass scale face 1, the weight of food acts on LOAD CELLS 7 and produces corresponding change in electric, send into microcomputer after handling by signal processing circuit, microcomputer shows with the unit of weight of selecting by LCD display 4 after calculating the weight of the food of surveying.

Please in conjunction with Fig. 1, shown in Figure 2, the memory stores of electronic module 5 the nutritional labeling data of unit weight of some kinds of foods, according to the kind of alleged food and in product manual the code of defined, by the code of digital key position input food corresponding on the touch glass scale face 1; The induction that is arranged in glass scale face 1 below is held finger touch position that grating array strake 2 and the touch induction keyboard sweep circuit appearance grid that array is corresponding sense and is handled and convert key command to and deliver to microcomputer, microcomputer is transferred the food unit weight nutrition data that storer is stored in advance according to food code, calculate the nutritive value data of the food of surveying again by the weight of being surveyed, show output by LCD display 4 at last.

By function key corresponding on the finger touch glass scale face 1, can control microcomputer output and show the different nutrition kind of food of the same race.

Special feature of the present utility model is atresia position, scale surface, and smooth easy to clean, water proofing property is fabulous.

Figure 3 shows that the circuit theory diagrams of touch-induction-type keyboard, keyboard wherein is arranged in matrix type structure with ranks.Receive respectively on a line and the alignment at the two ends of each button electric capacity, corresponding line of microcomputer gated sweep and alignment, realization realizes with the detection of less control port realization to more appearance grid push-button unit all hold the scanning detection of grid push-button unit in the matrix.Please in conjunction with shown in Figure 3, the keyboard scan of matrix type structure is born by a special IC, makes circuit system more succinct; The work of keyboard scan work and microcomputer is parallel, makes system works efficient and response speed improve.

Certainly; the utility model is not only applicable to above-mentioned glass nutrition scale of giving an example; to the device of other similar multifunctional electronic scale,, also belong to protection domain of the present utility model as long as the related keyboard that is used for the input operation instruction has adopted above-mentioned touch-induction-type keyboard mode.

Claims

1, a kind of multifunctional electronic scale that adopts the touch-induction-type button, include scale face (1), LOAD CELLS (7), induction keyboard (2), electronic module (5), display device (4), power supply (8), have and weigh and other additional functions, induction keyboard (2) function button is provided with more than three and three, it is characterized in that: the keyboard that is used for the input operation instruction has adopted the touch-induction-type button, can realize actuation of keys by pointing approaching or touching corresponding key position.

2, according to the multifunctional electronic scale of the described employing touch-induction-type of claim 1 button, it is characterized in that: the capacitance-grid type structure is made in the induced key unit in the described touch induction keyboard.

3, according to the multifunctional electronic scale of the described employing touch-induction-type of claim 1 button, it is characterized in that: matrix type structure is lined up by ranks in the induced key unit in the described touch induction keyboard, receive respectively on a line and the alignment at the two ends of each button electric capacity, the line and the alignment of microcomputer gated sweep response, realization detects the scanning of all push-button units in the matrix, realizes the detection of more push-button unit with less control port.

4, according to the multifunctional electronic scale of the described employing touch-induction-type of claim 1 button, it is characterized in that: the nutritional labeling data of having stored the unit weight of some kinds of foods in the system, microcomputer in the system is by institute's food weight of surveying and the food sequence numbering by touch-induction-type keyboard input, and the multiple nutritional components of alleged food is exported in calculating.

5, according to the multifunctional electronic scale of the described employing touch-induction-type of claim 3 button, it is characterized in that: the keyboard scan of described matrix type structure is born by a special IC.