CN2234610Y - Portable electronic weighing device - Google Patents

Abstract

The utility model relates to a portable electronic weighing device, which is mainly composed of a suspension beam, a base frame barrel, a cross beam, a pressure box, a force-changing frame, a circuit and an outer shell. When the electronic weighing device of the utility model weighs, the gravity of an object hung on a weighing hook makes a compression spring generate displacement; a metal wire arranged on the cross beam is made to slide along a sliding rod through a mechanical device; the resistance value of a variable resistor composed of the sliding rod and the metal wire is made to change and then is handled by the circuit. Finally, the weight of the weighed object is displayed in virtue of a plurality of luminous diodes arranged on the outer shell. The portable electronic weighing device of the utility model has visual display of weight units and high precision, and is capable of displaying to the weight unit of gram.

Description

Portable electronic scale

The utility model relates to a kind of electronic scales, particularly portable electronic scale.

The weighing-apparatus of weighing of Chu Shouing mostly is a spring balance in the market, when this spring balance is weighed, by the steelyard hook drag spring, spring is stretched by weighed object downwards, and the length that is stretched with spring by means of the scale mark on the shell shows the weight of weighed object.The precision of this spring balance changed with the quality and the service time of spring, and low precision can not show lower weight unit's (as gram), shows not directly perceived.The portable electronic scale that the purpose of this utility model is to provide a kind of precision height, intuitive display and can shows lower weight unit.

Portable electronic scale of the present utility model, comprise overarm, pedestal tube, crossbeam, pressure cell, variable force frame, circuit board and shell, its design feature is that described overarm comprises guide rod, guide plate, pressing plate, steelyard hook and spring, battery is housed in the guide rod, and the negative pole of this battery links to each other with the bottom interior surface of guide rod by battery spring.Claim hook to be installed in the lower end of guide rod.The outside of guide rod is with spring.Guide plate is fixed on the upper end of guide rod, also has through hole on this guide plate, and its size should be convenient to the loading, unloading of battery, is embedded with insulcrete in the through hole.Aperture is left at described insulcrete center, also is embedded with the conductive electrode with its uniform thickness in it, and this conductive electrode contacts with the positive pole of battery, one side guide plate also be welded with pressing plate, this pressing plate is inserted in the corresponding aperture at crossbeam middle part.Also be fixed with pillar on the pressing plate, an end of depression bar is enclosed within on this pillar, and can rotate around it.Opening is left in the upper end of pedestal tube, and the opening that dress guide rod is within it moved up and down is also left in the lower end; One side of this pedestal tube along its upper and lower to the centre have groove, the upper/lower terminal of the pedestal wall of groove both sides is welded with perpendicular footing respectively.The centre that is welded in two footings on pedestal tube top also is welded with a draw ring seat fixed head.Be stained with unit of plastic respectively on two top footings and the two following footing medial surfaces, the one side that does not contact with footing on this unit of plastic leaves pit, so that slide bar inserts back and footing insulation in it.The top, outer end of two footings of lower end is respectively arranged with round bearing and semicircle bearing, and an end of fulcrum inserts in the round bearing, and the other end is shelved on the semicircle bearing, leans on fulcrum one end of semicircle bearing to be welded with the transmission rod perpendicular with it.The lower end that is enclosed within the spring on the guide rod is welded with annulus, and a circumferential face down bonding of this annulus has end bridge, and its groove that passes pedestal tube one side links to each other with fulcrum.The variable force frame is a rectangular frame, and the one long margin frame contacts with the top of transmission rod by the pilot bar.The pedestal tube is opened on the side tube-wall of groove and laterally is welded with two shaft seats, is fitted with rotating shaft in it.Inboard, described crossbeam both sides is separately installed with arc metal plate and tinsel, and the two ends of this crossbeam are fixed with unit of plastic, and the metal clip in order to chucking also is housed on the crossbeam of unit of plastic inboard.Crossbeam is sleeved on the slide bar, and this slide bar is corresponding one by one with sheet metal and tinsel on the crossbeam.Pressure cell is contained on the unit of plastic of crossbeam one end, and the adjacent surface of described pressure cell and variable force frame leaves opening, and the pressoreceptor that can slide is housed in it, and there is sheet metal on the two sides of this pressoreceptor closed assembly respectively.Wherein the sheet metal center near the pressure cell opening part also is welded with perpendicular metal needle.And between another piece sheet metal and the pressure cell bottom little spring is housed.It is vertical and closely offset that metal needle and variable force frame are installed the scuncheon of rotating shaft.One side of shell is equipped with in order to show some light emitting diodes of weighed object weight, and this light emitting diode and circuit join.Spring in order to payment overarm deadweight is housed between end bridge and the shell.Opening is left on top one side of shell, to make things convenient for the loading and unloading of the battery in the guide rod.Be welded on that draw ring seat on the draw ring seat fixed head in the middle of the footing then stretches out shell upper and draw ring is nested together.

Because when portable electronic of the present utility model is weighed, can produce a mechanical shift, this displacement is converted into electric signal successively, again through the metering circuit counting, at last by being arranged on the diode displaying measured object weight on the shell.Not only intuitive display, and precision height can be shown to the unit of weight of gram.

The utility model is described in further detail for the knot drawings and Examples below.

Fig. 1 is a portable electronic scale broken section schematic perspective view of the present utility model;

Fig. 2 is the physical construction schematic perspective view of portable electronic scale;

Fig. 3 is parts connection status synoptic diagram such as the pedestal tube, guide rod, footing of portable electronic scale;

Fig. 4 is the overarm cross-sectional schematic of portable electronic scale;

Fig. 5 is the pressure cell cross-sectional schematic of portable electronic scale;

Fig. 6 is the circuit theory diagrams of portable electronic scale.

With reference to Fig. 1,2,3,4,5,6, portable electronic scale of the present utility model comprises overarm, pedestal tube 1, crossbeam, pressure cell 23, variable force frame 29, circuit board and shell 50.Described overarm is made of guide rod 39, guide plate 37, pressing plate 25, steelyard hook 41 and spring 38, and battery 42 is housed in the guide rod 39, and the negative pole of this battery links to each other with the bottom interior surface of guide rod 39 by battery spring 43.Steelyard hook 41 is installed in the lower end of guide rod 39.The outside of guide rod 39 is with spring 38.Guide plate 37 is fixed on the upper end of guide rod 39.This guide plate 37 also has through hole, and its size should make things convenient for the loading, unloading of battery 42.Be embedded with insulcrete 36 in the through hole.Aperture is left at described insulcrete 36 centers, also is embedded with the conductive electrode 35 with its uniform thickness in this aperture.This conductive electrode 35 contacts with the positive pole of battery 42.One side of guide plate 37 also is welded with pressing plate 25, and this pressing plate is inserted in the corresponding aperture at crossbeam middle part, also is fixed with the pillar 33 as fulcrum on the pressing plate 25, and an end of depression bar 34 is enclosed within on this pillar, and can rotate around it.Opening is left in the upper end of pedestal tube 1, and the opening that dress guide rod 39 is within it moved up and down is also left in the lower end.One side of this pedestal tube has groove along the centre of its above-below direction, and the upper/lower terminal of the pedestal barrel of groove both sides is welded with perpendicular last footing 3,30 and following footing 17,21 respectively.Also be welded with one between the last footing 3 and 30 in order to the draw ring seat fixed head 5 of draw ring seat 4 to be installed. Last footing 3,30 and following footing 17,21 inboards are stained with unit of plastic 20 respectively, and the one side that does not contact with footing on this unit of plastic leaves pit, so that metal slide bar 6,7,22,24 inserts back and footing insulation in it.Be respectively arranged with round bearing 16 and semicircle bearing 19 above being welded on the outer end of footing 17,21 of pedestal tube 1 one side lower ends, an end of fulcrum 18 inserts in this round bearing, and the other end is shelved on the semicircle bearing 19.Fulcrum 18 1 ends by semicircle bearing 16 are welded with the transmission rod perpendicular with it 14.The lower end that is enclosed within the spring 38 on the guide rod 39 is welded with annulus 40, and a circumferential face down bonding of this annulus has end bridge 15, and its groove that passes pedestal tube 1 one sides links to each other with fulcrum 18.Variable force frame 29 is a rectangular frame, and the one long margin frame contacts with the top of transmission rod 14 by pilot bar 2.Pedestal tube 1 is opened on the side tube-wall of groove and laterally is welded with shaft seat 26,28, and the two ends of rotating shaft 27 then plug-in mounting are gone in this rotating shaft 26,28.Inboard, described crossbeam both sides is separately installed with arc metal plate 8,32 and arc metal plate 13, tinsel 11, the two ends of this crossbeam are fixing with unit of plastic 10, metal clip 9 in order to chucking also is installed on the crossbeam of described unit of plastic inboard, this crossbeam is sleeved on the slide bar 6,7,22,24, and slide bar 6,7,22,24 respectively with crossbeam on tinsel 11, sheet metal 8, sheet metal 13, sheet metal 32 corresponding one by one.Pressure cell 23 is contained on the unit of plastic 10 of an end of crossbeam.The adjacent surface of described pressure cell of grape and variable force frame 29 leaves opening, and the pressoreceptor that can slide is housed in it, and there is sheet metal 45,46 on the two sides of this pressoreceptor closed assembly respectively.Wherein sheet metal 45 centers near pressure cell 23 opening parts also are welded with perpendicular metal needle 31.And between another piece sheet metal 46 and the pressure cell bottom little spring is housed.The scuncheon of the metal needle 31 on the sheet metal 45 in the pressure cell 23 and variable force frame installation rotating shaft 27 is vertical and closely offset.One side of shell 50 is equipped with in order to show some light emitting diodes of weighed object weight, and this light emitting diode links to each other with circuit.Spring 47 in order to payment overarm deadweight also is housed between end bridge 15 and the shell 50.The upper surface of this shell leaves opening on one side, to make things convenient for the loading and unloading of battery 42 in the guide rod 39.Be welded in the middle of the footing 3,30 the draw ring seat fixedly 4 of draw ring seats on the saliva plate 5 stretch out shell 50 tops and draw ring 49 is nested together, when electronic scale weighing of the present utility model, hang over the power that object produced on the steelyard hook 41, by means of guide rod 39, pressing plate 25, spring 38, annulus 40, end bridge 15, fulcrum 18, transmission rod 14, variable force frame 29, sheet metal 45 in metal needle 31, pressure cell 23 passes to receptor 44 with power again, convert voltage to by pressoreceptor, this voltage is delivered to the input end of the operational amplifier A 1 of circuit.Simultaneously, spring 38 is compressed guide plate is descended, and drive crossbeam and 11 declines of the tinsel on it, thereby operational amplifier A 3 in-phase ends that are connected in the circuit and the resistance of the resistance R _ f between the output terminal are changed, utilize the characteristics of the circuit of operational amplifier A 2, A3 composition that this voltage and resistance are carried out multiplying, produce a frequency signal that is directly proportional with weighed object weight and give three integrated circuit CD4017, count in order by it.Last by receiving the weight that three light emitting diodes 55 on the integrated circuit CD4017 show weighed object.

Claims (1)

1. portable electronic scale comprises overarm, pedestal tube (1), crossbeam, pressure cell (23), variable force frame (29), circuit board and shell (50), it is characterized in that:

(1). described overarm comprises guide rod (39), guide plate (37), pressing plate (25), claims hook (41) and spring (38) that battery (42) is housed in the guide rod (39), and the negative pole of this battery links to each other with the bottom of guide rod (39) by battery spring (43); Steelyard hook (41) is installed in the lower end of guide rod (39); Spring (38) is enclosed within on the guide rod (39); Guide plate (37) is fixed on the upper end of guide rod (39), has through hole on it, and this through hole is embedded with insulcrete (36); Aperture is left at the center of insulcrete, and it is embedded with conductive electrode (35), and this conductive electrode contacts with the positive pole of battery (42); One side of guide plate (37) also is welded with pressing plate (25), and be inserted in the middle corresponding aperture of crossbeam the end of this pressing plate, and pressing plate (25) is provided with pillar (33), and an end of depression bar (34) then is enclosed within on the pillar (33), and can rotate around it;

(2). opening is left in the upper end of pedestal tube (1), and the lower end is also left and can be made the dress upper and lower mobile opening of guide rod (39) within it; This pedestal tube one side along its upper and lower to the centre have groove, the outside upper/lower terminal of groove two side tube-walls is welded with perpendicular last footing (3), (30) and following footing (17), (21) respectively; Also be welded with one between last footing (3) and (30) in order to the draw ring seat fixed block (5) of draw ring seat (4) to be installed; The inboard of last footing (3), (30) and following footing (17), (21) is stained with unit of plastic (20) respectively, the one side that does not contact with footing on each unit of plastic leaves pit, so that back and footing insulation in it are inserted in slide bar (6), (7) and slide bar (22), (24); The top, outer end of following footing (17), (21) is respectively arranged with round bearing (16) and semicircle bearing (19), one of fulcrum (18) is inserted in the round bearing (16), the other end is shelved on the semicircle bearing (19), and an end of the fulcrum (18) of close semicircle bearing (19) is welded with perpendicular transmission rod (14); The lower end that is enclosed within the spring (38) on the guide rod (39) is welded with annulus (40), and a circumferential side of this annulus links to each other with the end of Di Qiao (15), and the other end of end bridge and fulcrum (18) join;

(3). variable force frame (29) is a rectangular frame, and wherein a long margin frame contacts with the top of transmission rod (14) by pilot bar (2); Pedestal tube (1) is opened on the side tube-wall of groove and laterally is welded with shaft seat (26) and (28), and the two ends plug-in mounting of rotating shaft (27) is gone in this two rotating shaft;

(4). inboard, described crossbeam both sides is separately installed with arc metal plate (8), (32) and arc metal plate (13), tinsel (11), the two ends of this crossbeam are fixing with unit of plastic (10), and the metal clip (9) in order to chucking also is installed on the crossbeam of unit of plastic inboard; This crossbeam is sleeved on slide bar (6), (7), (22), (24), and slide bar (6), (7), (22), (24) respectively with crossbeam on tinsel (11), sheet metal (8), sheet metal (13), sheet metal (32) corresponding one by one;

(5). pressure cell (23) is contained on the unit of plastic (10) of crossbeam one end, the adjacent surface of this pressure cell and variable force frame (29) leaves opening, the pressoreceptor (44) that can slide is housed in it, there are sheet metal (45), (46) in the two sides of this pressoreceptor closed assembly respectively, wherein the center of the sheet metal (45) of close pressure cell (23) opening part also is welded with perpendicular metal needle (31), and between another piece sheet metal (46) and the pressure cell bottom little spring is housed; The scuncheon of the metal needle (31) on the sheet metal (45) in the pressure cell (23) and variable force frame installation rotating shaft (27) is vertical and closely offset;

(6). a side of shell (50) is equipped with in order to show some light emitting diodes (48) of weighed object weight, and this light emitting diode links to each other with circuit; The heavy spring (47) that supports in order to payment overarm deadweight also is housed between end bridge (15) and the shell (50); The upper surface of this shell (50) leaves opening on one side, to make things convenient for the loading and unloading of the battery (42) in the guide rod (39); Being welded on top and the draw ring (49) that draw ring seat (4) on the draw ring seat fixed head (5) in the middle of the footing (3), (30) then stretches out shell (50) is nested together.

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