CN2414403Y

CN2414403Y - Electric spring scale with caculation function

Info

Publication number: CN2414403Y
Application number: CN 00211183
Authority: CN
Inventors: 魏峥
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-16
Filing date: 2000-03-16
Publication date: 2001-01-10
Anticipated expiration: 2010-03-16

Abstract

The utility model relates to an electric spring scale with a calculation function, wherein, a portable scale has a structure that the left upper part of an outer shell is provided with a zero position adjusting screw, and a display and a keyboard are arranged on the front surface of the outer shell. A spring is sheathed outside a T-shaped hook draw rod in the outer shell, and a weighing hook is arranged on the lower part of the T-shaped hook draw rod. A gear rotary disk is arranged on a dial with a line plate. A pointer is arranged on the gear rotary disk. A leading wire of the dial is connected to a chip. A rack on the right side of the T-shaped hook draw rod and the gear rotary disk are engaged. The electric spring scale with a calculation function can also be a slide potentiometer type structure. The inner structure of the electric spring scale with a calculation function is arranged in a horizontal outer shell to make a platform scale or a track scale. The utility model has the advantages of small volume, simple structure, high sensitivity, and low manufacturing cost; a power supply does not need to be added.

Description

Electronics spring balance with computing function

The design that the utility model belongs to spring balance, electronic scale and manufacturing technology and the technical field that the two combines.

How China is among the people at present claims or the pound title with bar.Its king-rod claims and will be eliminated successively.Commerce is sold goods and is generally used table scale.The use electronic scale that has.The advantage of electronic scale is: weighing is accurate, and error is little, can valuate, and both parties all can observe.But its volume is big and additional power source (220 volts) need be arranged, and price is also high.

The purpose of this utility model is, provides a kind of weighing to adopt mechanical system, observe to calculate and adopt the electronics mode, can regulate zero point automatically within the specific limits, do not need the electronics spring balance with computing function of additional power source.

The technical solution of the utility model is:

Prior mechanical table scale or portable spring balance observation calculating section are added electronic installation, make it become electronics spring balance with calculating (valency) function.Specific practice is: each scale on the index dial that claims is drawn a lead and the lead of identical weight unit's (gram, two) is merged (to reduce the number of similar lead-in wire), concentrate then to cause on the soft packaged chip.The position that perhaps produces distortion with the potentiometer that slides with when weighing is connected as a single entity, and its resistance value is followed the variation of weight and changed, thereby introduces the variation of oscillation frequency, and the frequency that changes is introduced in the integrated circuit.During weighing by be correlated with demonstrations (gram, kilogram) or operate (keypad calculating) of the program of establishment in advance.As 5 yuan every kilogram of certain commodity, show several 2 kilograms on the display, by " * ", 5 keys=10 yuan.By " * ", 5 liang of keys, back weighing also can earlier.This electronics spring balance also is equipped with an electronic watch by same chip controls.This claims to divide portable, desk-top and console mode.

Utilizing existing micro-computer technology, the program after the experiment is made the form of soft encapsulation, is not difficult.Show and use LCD, the power supply of this product just can be adopted button cell so.

This product peripheral circuit is extremely simple, owing to adopted soft packing forms, in its production run, circuit does not need to debug, and can assemble under any condition again.

Below in conjunction with accompanying drawing planform of the present utility model is done and to be specified

Fig. 1 is a portable title surface structure synoptic diagram in the utility model

Fig. 2 is the inner structure synoptic diagram of the utility model transfer disc type

Fig. 3 is the circuit lead synoptic diagram of the utility model transfer disc type

Fig. 4 is the inner structure synoptic diagram of slide potentiometer formula in the utility model

Fig. 5 is the circuit lead synoptic diagram of the utility model slide potentiometer formula

Fig. 6 is a flow chart of the present utility model

1-zeroising screw 2-shell 3-hook 4-display 5-keyboard 6-spring 7-T shape hook pull bar 8-index dial 9-wiring board ground 10-pointer 11-gear turntable 12-index dial lead-in wire 13-interface chip 14-control chip 15-sliding bar 16-resistance board 17-variable resistor lead-in wire

Now being called example with portable electronics spring is narrated.Its inner structure is applicable to portable, desk-top and console mode (weighbridge).

The upper left quarter of shell 2 is adorned a zeroising screw 1.Display 4 and keyboard 5 are arranged on shell 2 fronts.A T shape hook pull bar 7 is adorned in the lower end of shell 2 inner zeroising screws 1, and spring 6 is sleeved on outside the T shape hook pull bar 7 from bottom to top.The hook 3 of weighing is adorned in T shape hook pull bar 7 bottoms.Have on the index dial 8 on wiring board ground 9 gear turntable 11 is housed.Fix a pointer 10 on the gear turntable 11.Index dial lead-in wire 12 is associated on the interface chip 13.Rack and pinion rotating disk 11 engagements on T shape hook pull bar 7 right sides.The structure of slide potentiometer formula and rotating disc type, its left part and portable identical, right part has " recessed " shape groove on T shape hook pull bar 7, and sliding bar 15 inserts into the inner, the copper sheet of sliding bar 15 1 sides slides on resistance board 16, and variable resistor 17 is connected on the resistance board 16.Control chip 14 is welded on the host line plate.

Portable electronics spring balance with table scale, weighbridge identical point is: the two circuit and working routine are identical; Gravity all acts on the spring during the two weighing weight, thereby tooth bar is moved, driven gear turn disc, the corresponding demonstration of make displays.The two difference is: the former uses 1～2 spring for portable; The latter two are horizontal (inner structure is contained in the horizontal shell), can use 1 or 2 or 4 spring.When the former weighed, weight hung over the bottom; When the latter two were weighed, weight was placed on top (on the dish).

Principle of work of the present utility model:

Adjust zero point before weighing earlier.This claims to adopt dual mode to return to zero, promptly soft, combination of hardware zeroing.In the scope that error drift allows, zero point is fixing, and starting point is zero point, discerns automatically with software and handles; When error exceeds allowed band more greatly, claim to have prompt to occur and refuse weighing, at this moment should regulate zeroising screw 1, error is got back in the scope of permission, can weigh.

This title can also carry out man-machine conversation by keyboard except that having the weighing function, carry out the operation of related content.When not using the function of title, can also finish some and the closely-related subsidiary function of our daily life.As can be seen from Figure 4, when adding (hanging or placement) weight amount, the action of gravity of weight produces T shape plate and moves on spring, and is mobile thereby the drive sliding bar produces, and the resistance of variable resistor lead-in wire output is changed.

We just can find in Fig. 5, when weight one timing, the resistance value of slide potentiometer just is fixed on a certain numerical value, thereby the oscillation frequency that makes oscillator also be fixed on the corresponding a certain value of this numerical value on, by lead-in wire this frequency values is introduced in control chip, then through calculating get final product the actual weight value.

The various functions that this product can be finished have: the conversion between various unit of weights, and as gram, kilogram etc.Simple calculations: add, subtract, multiplication and division etc., and weigh relevant function key such as unit price, the amount of money etc., and subsidiary function is as calendar, clock, timing etc.For this reason specialized designs a kind of program and the supporting use of this product.Flow chart as shown in Figure 4.

The utility model has the advantages that simple in structure, volume is little, the accuracy height shows sensitively, function is many, and is easy to carry, must additional power source, and cost is low.

Press the explanation of accompanying drawing structure and instructions the 5th part, process, purchase the parts assembling and can implement the utility model.

Claims

1. the electronics spring balance that has computing function, by shell, load-supporting part, spring, index dial and associated components are formed, it is characterized in that forming by machinery and electronics two-part structure, the structure of portable title is, the upper left quarter of shell (2) is adorned a zeroising screw (1), display (4) and keyboard (5) are arranged on shell (2) front, a T shape hook pull bar (7) is adorned in the lower end of the inner zeroising screw of shell (2) (1), spring (6) is sleeved on outside the T shape hook pull bar (7) from bottom to top, the hook (3) of weighing is adorned in T shape hook pull bar (7) bottom, have on the index dial (8) of wiring board ground (9) gear turntable (11) is housed, fix a pointer (10) on the gear turntable (11), index dial lead-in wire (12) is associated on the chip (13), rack and pinion rotating disk (11) engagement on T shape hook pull bar (7) right side

Slide potentiometer formula structure is, its left part structure is with portable identical, right part has " recessed " shape groove on T shape hook pull bar (7), sliding bar (15) stretches into wherein, sliding bar (15) one sides have the copper sheet of going up slip at resistance board (16), variable resistor (17) is connected on the resistance board (16), and control chip (14) welds in the circuit board.

2. electronics spring balance according to claim 1 is characterized in that inner structure is contained in and makes table scale or weighbridge in the horizontal shell.