CN203132675U

CN203132675U - Electronic platform scale

Info

Publication number: CN203132675U
Application number: CN 201320106296
Authority: CN
Inventors: 胡龙险; 朱惠忠; 李月秋
Original assignee: SHENZHEN HEALTHCARE ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: SHENZHEN HEALTHCARE ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2013-03-08
Filing date: 2013-03-08
Publication date: 2013-08-14
Anticipated expiration: 2023-03-08

Abstract

The utility model discloses an electronic platform scale, comprising a weighing platform, a weighing sensor, a signal processing circuit, a display apparatus, a microprocessor, a plurality of induction electrode slices and a button detection circuit. The surface of the electronic platform scale is provided with a plurality of button induction positions, each induction electrode slice is arranged in the corresponding button induction position, the button induction position is prepared from non-conductor material, a plurality of induction electrode slices are electrically connected with the microprocessor through the button detection circuit, the button detection circuit is used for detecting the trigger states of a plurality of induction electrode slices, and the microprocessor executes corresponding button functions according to the trigger states and time sequence of a plurality of induction electrode slice transmitted by the button detection circuit. According to the electronic platform scale, many function logics are realized through a few induction electrode slices, not only is cost reduced by decreasing the number of buttons, but also a keyboard area is reduced, cost is minimized, and the design free degree is increased.

Description

A kind of electronic platform scale

Technical field

The utility model relates to a kind of electronic scales, relates in particular to a kind of multifunction electronic platform scale that adopts a plurality of noncontact induced key controls.

Background technology

Electronic scales is used very extensive in commercial production, commodity transaction and schedule life, and its basic function is to carry out the weighing of weight of object and quality.Electronic scales generally comprises weighing platform, LOAD CELLS, be used for to sensor signal carry out measurements and calculations and finally draw testee weight electronic module, show weighing result display, the power supply of the system works energy etc. is provided.

For fear of the meaningless power consumption of off working state, when adopting usually and use, opens by electronic scales powered-down or make it enter holding state when not using.In addition, in order to obtain accurately directly object weighing result, also need to possess system's transformation of criterion functions such as peeling, zero clearing.The man-machine interaction instruction that realizes operating functions such as these switches, peeling, zero clearing need input to control circuit by the function button that arranges.

Function button commonly used of the prior art has dual mode, and the one, the mechanical key mode by pressing the internal short-circuit parts, makes the mode of two contact short of identification actuation of keys, realizes button operation identification; Common have mechanical keyswitch or a film key; The operation of this function button is accompanied by certain mechanical motion, and the life-span of button is limited by the fatigue lifetime of contact and moving component.Another kind is the touch sensible button, this is the principle that adopts capacitive sensing, at the button position electric capacity pole piece is set, this electric capacity pole piece inserts in the capacitance measurement circuit by lead, when finger hand capacity pole piece, electric capacity pole piece periphery change in dielectric constant causes the detected capacitance parameter of metering circuit to change; By detecting the size of output variable quantity, internal circuit recognition and verification actuation of keys.Existing touch sensible button has direct touch and touches two kinds indirectly, and directly the touch sensible button is the outside surface that electrode is overlayed on housing, and directly touch sensible triggers; The touch sensible button is that the electric capacity pole piece is overlayed on the housing of dielectric material making or the inside surface of scale face indirectly, at the corresponding button pattern indication of the outside surface correspondence position printing of housing or scale face key position; When touching the body surface that covers, also can cause the electrode perimeter change in dielectric constant, and then cause the output of capacitive detection circuit to change, realize keypress function identification.

The operation of above-mentioned two kinds of buttons all needing to realize operator's finger presses or touch key-press position.In some application scenario, such as for health or clean consider, hand is inconvenient when directly contacting the scale body, and such button operation is with regard to some inconvenience.In addition, for mechanical key, if realize multiple function, the button that a greater number need be set is realized, can increase the area that corresponding cost and button take like this.

Summary of the invention

For purposes such as health, safety, namely can realize operating on it if under some occasion, can not contact electronic platform scale, just seem very convenient.The utility model provides a kind of electronic platform scale, and the user can realize button operation with finger or conductor during near the induction zone of electronic platform scale, and can be with the less more function treatment of induced electricity pole piece realization.

A kind of electronic platform scale, comprise weighing platform, LOAD CELLS, signal processing circuit, display device and microprocessor, described weighing platform is pressed on the LOAD CELLS, described LOAD CELLS is electrically connected with described microprocessor by described signal processing circuit, described display device is electrically connected with described microprocessor, also comprise induced electricity pole piece and key press detecting circuit, described electronic platform scale surface is provided with a plurality of key induced positions, each induced electricity pole piece is arranged at the inside at corresponding key induced position, the material at described key induced position adopts non-conductive material, a plurality of induced electricity pole pieces are electrically connected with described microprocessor by described key press detecting circuit, state and time sequencing that a plurality of induced electricity pole pieces that described microprocessor is used for sending according to key press detecting circuit are triggered are carried out corresponding keypress function.

The function that aforesaid " microprocessor is used for " is not this microprocessor of expression only has only above-mentioned functions, and this microprocessor can also comprise other functions.

Preferably, also comprise shell and lower casing, described weighing platform is fixed on described going up on the shell, described LOAD CELLS, signal processing circuit, display device, microprocessor and key press detecting circuit are installed in the space that assembling forms in shell and the lower casing, and the structure that described weighing platform and shell are combined into is supported by at least three LOAD CELLS; Described electronic platform scale also comprises indicating value viewing area and weighing platform district, and described induced electricity pole piece is arranged on the lower surface at key induced position.

Compare with prior art, noncontact induced key electronic platform scale of the present utility model has following advantage: at first, do not need touch key-press induction position, avoided people's finger and the cross-contamination between the electronic platform scale body, the situation of having avoided some action need to wipe hand repeatedly or wash one's hands; Secondly, realize more function logic with less induced electricity pole piece, not only can be by reducing number of keys to reduce cost, the while also can reduce keyboard area, reduces cost and increases design freedom.

Description of drawings

Fig. 1 is the structural representation of electronic platform scale of the present utility model;

Fig. 2 is the button operation synoptic diagram of electronic platform scale of the present utility model;

Fig. 3 is the system principle diagram of electronic platform scale of the present utility model.

Embodiment

Below with reference to accompanying drawing, specific embodiment of the utility model is described in further detail.

As shown in Figures 1 to 3, a kind of electronic platform scale, comprise weighing platform 1, the induced electricity pole piece 2 of a plurality of employing conductor materials, housing, display device 4, LOAD CELLS 7, key press detecting circuit, signal processing circuit, microprocessor, housing comprises upper shell 3 and lower house 6, LOAD CELLS 7, microprocessor, key press detecting circuit, signal processing circuit is installed in the space of upper shell 3 and lower house 6 assembling back formation, weighing platform 1 is fixed on the upper shell 3, shell 3 and weighing platform 1 and the tested weight body that is placed on the weighing platform 1 are supported by LOAD CELLS 7, LOAD CELLS 7 has three at least, LOAD CELLS 7 has 4 in the present embodiment, lay respectively at the position at four angles 13 in the housing, weighing platform 1, the total weight of upper shell 3 and tested weight body acts on four LOAD CELLS 7.

The surperficial corresponding induced electricity pole piece 2 of electronic platform scale is provided with key induced position 11, the material at this position adopts non-conductive material, induced electricity pole piece 2 is arranged on the inside at key induced position 11, be the inside of electronic platform scale, for example can be arranged on the lower surface place at key induced position 11, i.e. the surface that contacts with upper shell 3.The display device 4 of electronic platform scale can be arranged on the below of viewing area, and weighing platform 1 other zones except viewing area and key induced district all can be used as the Weighing Area of electronic platform scale.

Certainly, key induced position 11 can be arranged on the side of electronic platform scale, and finger is from the side near this button position 11.Also can save upper shell 3, weighing platform 1 is directly supported by four LOAD CELLS 7.

A plurality of induced electricity pole pieces 2 are electrically connected with microprocessor by key press detecting circuit, and LOAD CELLS 7 is electrically connected with microprocessor by signal processing circuit, and display is electrically connected with microprocessor.

As sense object during near key induced position 11, when for example moving in the setpoint distance D of 11 tops, key induced position with finger 14, human body sensing causes that induced electricity pole piece 2 ground capacitance change, be that induced electricity pole piece 2 is triggered, the output that causes key press detecting circuit changes, the signal that the key press detecting circuit output key is pressed, if sense object does not appear in 11 tops, key induced position, perhaps sense object exceeds this setpoint distance D from the distance at key induced position 11, and key press detecting circuit then can not exported this signal.Thereby realized the button of no-contact electronic platform scale and finished operation to electronic platform scale.

Shown in arrow among Fig. 2, after two or more induced electricity pole pieces 2 are triggered by finger 14 simultaneously or successively, the key press detecting circuit key press detecting circuit is to the triggering state of each induced electricity pole piece 2, and the time sequencing that is triggered between each induced electricity pole piece 2 detects and judges, the time sequencing that two induced electricity pole pieces 2 are triggered can corresponding five kinds of states: the first induced electricity pole piece corresponding state that is triggered only, the second induced electricity pole piece corresponding state that is triggered only, the first induced electricity pole piece and the second induced electricity pole piece trigger corresponding state simultaneously, being triggered in proper order to the second induced electricity pole piece by the first induced electricity pole piece is a state, being triggered in proper order to the first induced electricity pole piece by the second induced electricity pole piece is a state, utilize two noncontact induced keys can realize 5 function logics like this, corresponding each triggering and sequential logic state, microprocessor can be identified judgement by the signal that key press detecting circuit sends over, and then carries out corresponding function command (keypress function).

Calculate that accordingly two or more induced electricity pole pieces 2 are arranged in proper order with certain interval one dimension, the key command quantity that can realize is M=4n-3, and wherein M is attainable function command number, and n is for independently induced electricity pole piece 2 is several.

For example: two induced keys can be realized 5 logic functions; Three induced keys can be realized 9 logic functions.Four induced keys can be realized 13 logic functions.

Induced electricity pole piece 2 also can be arranged in proper order with other, for example triangle, circle etc., a plurality of induced electricity pole pieces 2 also can be triggered according to different time sequencings, thereby microprocessor can be carried out corresponding function command, compare with the button of traditional equal number, can realize the more function instruction.

Electronic platform scale can adopt battery 8 to power, and is furnished with corresponding battery cover 9, display device 4 can adopt LCD display, weighing platform 1 can adopt the glass face of weighing, and at key induced position 11 the button screen printing pattern is set, to play the effect of sign, microprocessor can adopt microcomputer, and LOAD CELLS 7 can be supported on the table top of placing electronic platform scale by feet 10.Key press detecting circuit, microprocessor, signal processing circuit and the storer that is electrically connected with microprocessor can be integrated on the electronic module 5, and are installed in the space of upper shell 3 and lower house 6 cooperation formation.

Institute is surveyed object to be placed on the weighing platform 1, the weight of object acts on LOAD CELLS 7 and produces corresponding change in electric, send into microprocessor after handling by signal processing circuit, microprocessor shows by the unit of weight of display device 4 with setting after calculating the weight of the object of surveying.

When needs are implemented other functions, during such as operations such as calculation of price, standard component counting, material composition analyses, induced electricity pole piece 2 and sequential logical definition by design in advance trigger the one or more buttons of correspondence, namely can realize corresponding instruction input.

Claims

1. electronic platform scale, comprise weighing platform, LOAD CELLS, signal processing circuit, display device and microprocessor, described weighing platform is pressed on the LOAD CELLS, described LOAD CELLS is electrically connected with described microprocessor by described signal processing circuit, described display device is electrically connected with described microprocessor, it is characterized in that: also comprise a plurality of induced electricity pole pieces and key press detecting circuit, described electronic platform scale surface is provided with a plurality of key induced positions, each induced electricity pole piece is arranged at the inside at corresponding key induced position, the material at described key induced position adopts non-conductive material, a plurality of induced electricity pole pieces are electrically connected with described microprocessor by described key press detecting circuit, state and time sequencing that a plurality of induced electricity pole pieces that described microprocessor is used for sending according to key press detecting circuit are triggered are carried out corresponding keypress function.

2. electronic platform scale as claimed in claim 1, it is characterized in that: also comprise shell and lower casing, described weighing platform is fixed on described going up on the shell, described LOAD CELLS, signal processing circuit, display device, microprocessor and key press detecting circuit are installed in the space that assembling forms in shell and the lower casing, and the structure that described weighing platform and shell are combined into is supported by at least three LOAD CELLS; Described electronic platform scale also comprises indicating value viewing area and weighing platform district, and described induced electricity pole piece is arranged on the lower surface at key induced position.