CN105973389A

CN105973389A - Two-precision weighing electronic scale

Info

Publication number: CN105973389A
Application number: CN201610096950.8A
Authority: CN
Inventors: 申俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-01-20
Filing date: 2016-01-20
Publication date: 2016-09-28

Abstract

The invention discloses a two-precision weighing electronic scale. The two-precision weighing electronic scale comprises a loading plate on which an object to be weighed is placed, a base which is arranged below the loading plate, and two-precision weighing sensors which are arranged in the base to support the loading plate. Each two-precision weighing sensor comprises a first mounting seat, a first precision weighing sensor, a second mounting seat, a second precision weighing sensor and an elastic support piece, wherein the first mounting seat, the first precision weighing sensor, the second mounting seat, the second precision weighing sensor and the elastic support piece are successively crimped. Each elastic support piece comprises an upper support piece, a spring and a lower support piece. The top end of each spring abuts against an upper support piece. The bottom end of each elastic support piece abuts against a lower support piece. Each second mounting seat is provided with a force transmitting crimp part. Each lower support piece is provided with a force transmitting support part. In a free state, the force transmitting crimp part is higher than the force transmitting support part. When the second mounting seat is stressed, the second precision weighing sensor compresses the spring and drives the force transmitting crimp part to move down. When the second mounting seat is stressed to a preset extent, the force transmitting crimp part moves down to crimp the force transmitting support part. The two-precision weighing electronic scale provided by the invention has two-step continuous range, and has different precision values in the range of each step.

Description

A kind of double precision weighing electronic scale

Technical field

The invention belongs to equalizer technology field, be specifically related to a kind of double precision weighing electronic scale.

Background technology

Body weight electronic scale in the market, its structure mainly includes support board, display screen, regulation button, power module With the LOAD CELLS composition for supporting support board, its function is mainly used in human body of weighing, and is usually when carrier body weight After amount exceedes preset value, display screen just starts to show numerical value, and this preset value is usually 5 kilograms；It addition, this kind of body weight electronic scale Maximum range is usually 180 kilograms, and accuracy value only has 100 grams, and error is relatively big, so this traditional body weight electronic scale removes on ordinary days Outside weighing in, substantially cannot function as its use, especially cannot be used for using as electronic scale.And existing kitchen electricity Sub-scale, its accuracy value can reach 1 gram the least, but its range is usually no more than 10 kilograms, so cannot function as scale Use.

Summary of the invention

It is an object of the invention to provide and a kind of there is the continuous range in double rank and in the range of each rank, there is different accuracy value Double precision weighing electronic scale.

The technical scheme realizing the object of the invention is: a kind of double precision weighing electronic scale, including for putting object to be claimed Support board, be arranged on the base below support board and the double precision weighing and sensing for supporting support board in the base be set Device；Each double precision LOAD CELLS includes crimping the first mounting seat of setting, the first precision LOAD CELLS, the second installation successively Seat, the second precision LOAD CELLS and elastic supporting piece；Elastic supporting piece includes upper supporting part, spring and lower supporting part, spring Top be connected on upper supporting part, the bottom of elastic supporting piece is connected on lower supporting part；Second mounting seat is provided with to lead and defeats Meeting portion, lower supporting part is provided with leads power support；Under free state, the power pressure contact portion of leading exceeds leads power support；Second mounting seat is held By the second precision LOAD CELLS compression spring during pressure stress, and then drive is led to defeat and is connect subordinate's shifting, when the second mounting seat is held When pressure stress is to predeterminable level, lead to defeat meeting subordinate and move to be crimped on and lead on power support.

In such scheme, the range of the first precision LOAD CELLS is more than the range of the second precision LOAD CELLS.

In such scheme, the outer wall of each pair of rank LOAD CELLS is provided with the clamping installation portion for installing self entirety, Base is provided with buckling groove, and each pair of rank LOAD CELLS is fixed in a corresponding buckling groove by clamping installation portion.

When the present invention weighs in the first rank range, namely the power pressure contact portion of leading not yet is displaced downwardly to be crimped on and leads on power support Time, although the first precision LOAD CELLS and the second precision LOAD CELLS stress simultaneously, but the second precision can be utilized to weigh The independent check weighing of sensor, namely externally connected with display screen only shows the data that the second precision LOAD CELLS measures, its accuracy value is The accuracy value of two precision LOAD CELLSs, general uses higher precision, and such as accuracy value is 1 gram or less；In the second amount When weighing in journey, namely lead to defeat and meet subordinate and move to be crimped on when leading on power support, although the first precision LOAD CELLS and Second precision LOAD CELLS stress simultaneously, but the first independent check weighing of precision LOAD CELLS can be utilized, namely external display Screen only shows the data that the first precision LOAD CELLS measures, and its accuracy value is the accuracy value of the second precision LOAD CELLS, one As to use relatively low precision, such as accuracy value be 100 grams or bigger；It addition, the present invention weighs in second-order range ability Time, now lead to defeat meeting subordinate and move to be crimped on and lead on power support, spring deformation is not further added by, namely is applied to the second precision Pressure on LOAD CELLS is not further added by, thus effectively protects the second precision LOAD CELLS so that it is will not be overweight because of load And damage；Additionally, the present invention is by selecting spring as the core of elastic supporting piece, can make by selecting suitable spring Lead power pressure contact portion and lead there is between power support suitable clearance distance, can reduce the second mounting seat and elastic supporting piece Requirement on machining accuracy, can guarantee that again comfort during use.

Accompanying drawing explanation

Fig. 1 is a kind of perspective view of the first structure of the present invention；

Fig. 2 is a kind of side view of electronic scale shown in Fig. 1；

Fig. 3 is a kind of structural representation that in electronic scale shown in Fig. 1, double precision LOAD CELLS is in the first rank range state Figure；

Fig. 4 is that double precision LOAD CELLS shown in Fig. 3 is in second-order range and weighs a kind of structural representation of state；

Fig. 5 is the first precision LOAD CELLS and a kind of blast of the first screw in double precision LOAD CELLS shown in Fig. 3 Figure；

Fig. 6 is the first precision LOAD CELLS shown in Fig. 5 and first screw a kind of explosive view when another angle is observed；

Fig. 7 is the second precision LOAD CELLS and a kind of blast of upper supporting part in double precision LOAD CELLS shown in Fig. 3 Figure；

Fig. 8 is the second precision LOAD CELLS shown in Fig. 7 and the upper supporting part a kind of explosive view when another angle is observed；

Fig. 9 is that the second structure of the present invention is in the first rank range and weighs a kind of structural representation of state；

Figure 10 is that double precision LOAD CELLS shown in Fig. 9 is in second-order range and weighs a kind of structural representation of state；

Figure 11 is the first precision LOAD CELLS and a kind of explosive view of capping in double precision LOAD CELLS shown in Fig. 9；

Figure 12 is the first precision LOAD CELLS shown in Figure 11 and the capping a kind of explosive view when another angle is observed；

Figure 13 is that the third structure of the present invention is in the first rank range and weighs a kind of structural representation of state；

Figure 14 is a kind of structural representation when removing regulation screw and spring of the double precision LOAD CELLS shown in Figure 13；

Figure 15 is a kind of structural representation regulating screw in double precision LOAD CELLS shown in Figure 13；

Double precision LOAD CELLS shown in Figure 16 Figure 13 is in second-order range and weighs a kind of structural representation of state；

Figure 17 is that the 4th kind of structure of the present invention is in the first rank range and weighs a kind of structural representation of state；

Figure 18 is that double precision LOAD CELLS shown in Figure 17 is in second-order range and weighs a kind of structural representation of state；

Figure 19 is that the 5th kind of structure of the present invention is in the first rank range and weighs a kind of structural representation of state；

Figure 20 is that double precision LOAD CELLS shown in Figure 19 is in second-order range and weighs a kind of structural representation of state.

Detailed description of the invention

(embodiment 1)

The present embodiment is a kind of double precision weighing electronic scale, as shown in Fig. 1 to Fig. 8, including for putting object to be claimed Support board 91, it is arranged on the base 92 below support board and in the base four are set claim for supporting the double precision of support board Weight sensor 93.

Each double precision LOAD CELLS include crimping successively setting first mounting seat the 1, first precision LOAD CELLS 2, Second mounting seat the 3, second precision LOAD CELLS 4 and elastic supporting piece 5；Elastic supporting piece includes upper supporting part 51, thread bullet Spring 52 and lower supporting part 53.The top of spring is connected on upper supporting part, and the bottom of elastic supporting piece is connected to lower supporting part；Under Supporting member is provided with leads power support 531.

The diapire of the first mounting seat is provided with the first deck 11, and the roof of the first mounting seat has a plane, is used for gluing Knot is fixed on the diapire of external support board；First precision LOAD CELLS is provided with first fixed part the 21, first load deformations 22 and the first resistance strain gage 23 of being arranged in the first load deformations, the first resistance strain gage can be the first load deformation The deformation produced during portion's pressure-bearing stress is converted into the signal of telecommunication；First fixed part clamping is arranged in the first deck, and this clamping sets Put the assembly operation that can simplify the first precision LOAD CELLS；Second mounting seat is provided with leads power pressure contact portion 31 and mounting plate portion 32, mounting plate portion is horizontally disposed with, and the power pressure contact portion of leading is the annular boss being downwardly projected formation from mounting plate portion, mounting plate portion diapire Center be provided with the second deck 33；Second precision LOAD CELLS is provided with second fixed part the 41, second load deformations 42 and The second resistance strain gage 43 being arranged in the second load deformations, the second resistor disc is for the deformation of the second load deformations It is converted into the signal of telecommunication；Second fixed part clamping is arranged in the second deck；First load deformation of the first precision LOAD CELLS Portion's crimping is arranged in the mounting plate portion of the second mounting seat, and the second load deformations crimping of the second precision LOAD CELLS is arranged On upper supporting part.The existence of the first deck and the second deck is so that the first precision LOAD CELLS and the second precision are weighed The installation of sensor operates more rapid and convenient.

In the present embodiment, the second precision force cell is LOAD CELLS for kitchen use, and its range is 0 to 5 kilogram, precision Value can reach 1 gram；Specifically, the shape of described second fixed part be by four edges combination formed rectangular box-like, second holds The shape of power deformations is to be combined, by two bases and three straight flanges arranging with this base vertical, " mountain " font formed, the Two load deformations are arranged in the rectangle frame of the second fixed part, the central straight in three straight flanges of described second load deformations The inner side edge wall of the end on limit and a frame middle-end of the second fixed part is connected.The structure shape of this second precision LOAD CELLS Shape is relatively reasonable, it is easy to by impact style processing and manufacturing, and cost is relatively low.

In the present embodiment, the first precision LOAD CELLS is human body weighing's sensor, and its range is 0 kilogram to 50 kilograms, Accuracy value is 100 grams.

The present embodiment is owing to using four double precision LOAD CELLSs, and the scope of weighing of the first rank range is 0 to 20 kilogram, Can meet the demand that daily small articles is weighed, the scope of weighing of second-order range is 20 to 200 kilograms, can meet body scale The demand of weight.

In the present embodiment, the first precision LOAD CELLS is structurally similar to the second precision LOAD CELLS, but On the thickness of size and sheet material used bigger than the first precision LOAD CELLS.Specifically, the shape of described first fixed part is By four edges combination formed rectangular box-like, the shape of the first load deformations is by a base and to set with this base vertical " mountain " font that three the straight flange combinations put are formed, the first load deformations is arranged in the frame of the first fixed part, and described first The end of the center straight flange in three straight flanges of load deformations and the inner side edge wall phase of a frame middle-end of the first fixed part Even.The first precision LOAD CELLS and the first precision LOAD CELLS in the present embodiment are suitable for by impact style processing system Make, advantageously reduce manufacturing cost.It addition, the first precision LOAD CELLS and the second precision weighing and sensing used by the present embodiment Device may be used without the force cell the most widely circulated and price is the cheapest, thus effectively reduces manufacturing cost.

In the present embodiment, the first load deformations is provided with two the first fastener holes 221, the mounting plate portion of the second mounting seat Roof be provided with two and the adaptive fastening screws of the first fastener hole, the first load deformations is by adaptive with fastening screw Two the first screws 24 are spirally connected on the roof being fixed on mounting plate portion.Specifically, described three straight flanges of first load deformations In two straight flanges being positioned at straight flange both sides, center, be respectively provided with first fastener hole 221；Two the first screws are through corresponding It is rotated with after first fastener hole in corresponding fastening screw, thus being spirally connected of mounting plate portion is fixed on the first load deformations On diapire.This structure, while realizing the first load deformations crimping mounting plate portion, also utilizes the first load deformations straight Meeting location and installation plate portion, its structure more simplifies compact.In concrete practice, it is possible to by being anchored mode the top of mounting plate portion End is anchored on the diapire of the first load deformations, such as, arrange two anchors protruding upward on the roof of mounting plate portion convex Platform, arranges two anchor holes in the first load deformations, and each boss that is anchored passes anchor process after a corresponding anchor hole, this anchor The mode that connects also is effective and feasible.

In the present embodiment, the roof of upper supporting part is spirally connected by two the second screws 44 and is arranged on the second load deformations On diapire；Specifically, the top of upper supporting part is provided with two installation screws 514, and the second load deformations is provided with two Two fastenings 421；The top of upper supporting part is directly anchored to the second load by two second screws 44 adaptive with installation screw On the diapire of deformations.In the present embodiment, described three straight flanges of second load deformations are positioned at the two of straight flange both sides, center Bar straight flange, is respectively provided with second fastener hole.Certainly, described upper supporting part also can be fixedly installed on second by anchor mode and holds On the diapire of power deformations.Such as, the roof of upper supporting part arranges two anchor boss protruding upward, is respectively anchored boss After corresponding second fastener hole, then carry out anchoring process.This structure realize second load deformations crimping on While bearing member, also utilizing the second load deformations directly to position upper supporting part, its structure more simplifies compact.

The periphery wall on upper supporting part top is provided with the annular pressure contact portion 511 of evagination, and the bottom of upper supporting part is provided with spacing Traveller portion 512；The basic configuration of lower supporting part is discoideus, and the center is provided with the tubulose with sliding chamber projecting upwards formation Boss 532；Spring housing is located on tube shape bulge, and the top of spring is connected on the annular pressure contact portion of upper supporting part；Upper supporting part Spacing traveller portion 512 can slide up and down in the sliding chamber of tube shape bulge 532, namely play guide effect.Lead power support Having the annular bearing surface adaptive with leading power pressure contact portion on roof, tube shape bulge is positioned at the center of this annular bearing surface.

In the present embodiment, lead power pressure contact portion and mounting plate portion is made into integration, and enclose formation one cavity, the second deck, the Two precision LOAD CELLSs and upper supporting part are respectively positioned in this cavity.The advantage of this structure is to weigh the second precision Sensor and upper supporting part are protected, and prevent extraneous factor from disturbing it.In concrete practice, it is possible to will lead to defeat connecing Portion and mounting plate portion each make split part, are finally assemblied at together, are also feasible.

Under free state, the power pressure contact portion of leading exceeds leads power support；When the second mounting seat pressure-bearing stress by the second essence Spend LOAD CELLS compression spring, and then drive is led to defeat and connect subordinate's shifting, when the second mounting seat pressure-bearing stress is to predeterminable level, Lead to defeat and meet subordinate and move to be crimped on and lead on power support.

This relatively reasonable in structure, preferably spring can be accurately positioned, prevent its eccentric displacement, it addition, this Plant structure to be especially suitable for quickly assembling and later maintenance replacing.Additionally, this structure is also fully utilized by the performance advantage of spring, By selecting suitable spring, so that during free state, the bottom of power of the leading pressure contact portion of the second mounting seat and lower supporting part The gap on power of leading support top be in suitably sized, it is generally preferable to being 1 millimeter to 5 millimeters, preferably preferred size is 2 Millimeter is to 3 millimeters, and significantly can fall to people when human body weighs sense in excessive gap, because power of leading pressure contact portion now is necessary It is displaced downwardly to be crimped on and leads on power support, namely move down whole above-mentioned gap size；Too small gap may require that higher adding Work precision, improves technology difficulty and manufacturing cost.

In the present embodiment, the range of the first precision LOAD CELLS is greater than the range of the second precision LOAD CELLS, also I other words the maximum of the first precision LOAD CELLS is weighed, value is greater than the maximum of the second precision LOAD CELLS and weighs value, passes through Choose suitable spring, and select suitable power of leading pressure contact portion and the distance led between power support, can be by the second precision LOAD CELLS pressure is limited in its range ability, thus prevents the second precision LOAD CELLS from being pressed because of overweight Damage；The advantage of this limiter protected mode is: owing to the elastic deformation of strain gauge load cell is the least, such as the present embodiment In the second precision LOAD CELLS whole range in deformation difference in height calculate in microns, if use rigid support replace this Spring in embodiment, then the gap between power of leading pressure contact portion and power of the leading support of lower supporting part of the second mounting seat is the most necessary Weighing with micron, this is the most too high to requirement on machining accuracy, and draws in view of the error in materials processing molding and the temperature difference The material risen expands change, industrial is difficulty with；If but use spring to amplify deformation, just can effectively reduce machining accuracy Require and manufacturing cost.

The outer wall of the present embodiment the second mounting seat is provided with the clamping installation portion 34 for installing self entirety, and this clamping is pacified Dress portion is the wedge shape latch outwardly formed from the second mounting seat outer wall.Base 92 is provided with four blocked holes, and each pair of rank claim Weight sensor is fixed in a corresponding blocked hole by clamping installation portion；This mounting means more simplifies, and each pair Rank LOAD CELLS can independently dismount, it is simple to overhauls and changes, and its assembly operation is very convenient fast.

In the present embodiment, the power support of leading is provided with static contact 71, and the power pressure contact portion of leading is provided with moving contact 72, when this leads power Pressure contact portion is crimped on when leading on power support, and moving contact crimping is arranged on static contact, and both realize electrical connection.At concrete practice In, when moving contact and static contact electrical contact, produce a signal of telecommunication and control electricity to the external central control circuit being connected, central authorities When road receives this signal, show the data that the second precision LOAD CELLS measures on a display screen；When central control circuit not When receiving this signal, show the data that the first precision LOAD CELLS measures on a display screen；In other words, this dynamic/static contact Combine the signal switch automatically can changed as display screen video data；This structure, can simplify central authorities' control The programming of CPU element in circuit processed.In concrete practice, also can use other structure, for example with tongue tube, proximity switch etc. This dynamic/static contact is replaced to combine.

The operation principle of each double precision LOAD CELLS is:

The pressure that first mounting seat affords self all passes to the second installation by the first precision LOAD CELLS The mounting plate portion of seat；Second mounting seat is in free state namely when not bearing pressure, and it is led power pressure contact portion and exceeds lower supporting part Lead power support；

Compression spring during the second mounting seat pressure-bearing stress thus move down, when the first mounting seat pressure-bearing stress is less than 5 kilograms Time, namely time in the first rank range ability, by selecting suitable spring and selecting suitable power of leading pressure contact portion and lead power The spacing of support, during so that weigh in this rank range, the power pressure contact portion of leading will not be crimped onto and cause, on support, now pacifying Dress plate portion suffered by self all pressure transmission give the second precision LOAD CELLS, should during, the first precision LOAD CELLS All bear whole pressure with the second precision LOAD CELLS, but external display screen only shows that the second precision LOAD CELLS is surveyed The data arrived, its accuracy value is the accuracy value that the second precision LOAD CELLS has, the accuracy value in the present embodiment, in this range It it is 1 gram；

When the first mounting seat pressure-bearing stress is less than 50 kilograms and is more than or equal to 5 kilogram, namely at second-order range In the range of time, the power pressure contact portion of leading can be crimped on leads on power support, the pressure that now the second mounting seat is born, only sub-fraction Passing to the second precision LOAD CELLS, remaining major part is then directly passed to the power of leading of lower supporting part and props up by leading power pressure contact portion In bearing portion；Owing to, during this, the first precision LOAD CELLS bears whole pressure, so external display screen only shows The data that one precision LOAD CELLS measures, its accuracy value is the accuracy value that the first precision LOAD CELLS has, the present embodiment In, the accuracy value in this range is 100 grams；In this second-order range ability, the deformation of spring no longer increases, namely the second precision The pressure that LOAD CELLS is born is in preset range, so that the second precision LOAD CELLS will not be because of during Gai Overweight and damage.

The structure design of the present embodiment is relatively reasonable, it is possible to reduce requirement on machining accuracy, reduces manufacturing cost and technique is difficult Degree；Additionally can also effectively prevent the second precision LOAD CELLS because of overweight and crushing；In addition outside the present embodiment the second mounting seat Wall is provided with the clamping installation portion for installing self entirety, when assembling, can entire card be contained on external plastic feet, operation Simple and direct facility.

The present embodiment also includes the governor motion 6 for regulating elastic supporting piece whole height；The periphery wall of lower supporting part Being provided with the stopper section 533 of evagination, the periphery wall leading power pressure contact portion is provided with external screw thread district 311；Governor motion includes regulation rotation Covering 61 and to top spiral cover 62, the inwall of this regulation spiral cover bottom is provided with the annular anticreep pressure contact portion 611 of convex, the inwall on top It is provided with and leads the internal threaded regions 612 that power pressure contact portion external screw thread district is adaptive；Described anticreep pressure contact portion is set in the position of lower supporting part On periphery wall below stopper section, top spiral cover is also screwed in the external screw thread district leading power pressure contact portion, is positioned at regulation spiral cover Top, and be connected to regulate on spiral cover；Under external force, power support leading power pressure contact portion bottom and can be led in described stopper section Slide up and down between top.During free state, lower supporting part is under the reseting elasticity effect of spring so that it is anticreep pressure contact portion top Being connected on stopper section, when the first mounting seat pressure-bearing stress, stress is shortened by spring, and power of the leading pressure contact portion of the second mounting seat will band Moving regulation spiral cover and move down top spiral cover, anticreep pressure contact portion 611 now moves down the most therewith, is positioned at the lower section of stopper section 533.

The advantage of this kind of structure is: in concrete practice, spring owing to being restricted by its processing technique, its concordance Being difficult to ensure that, typically can use four double precision LOAD CELLSs due to weighing scale and kitchen scale, concordance is difficult to ensure that simultaneously Spring may result in the height of four LOAD CELLSs and slightly distinguish, impact assembles and uses, and even picks up when user When electronic scale is observed, the bottom of each lower supporting part may not at grade, and pole is unsightly；The present embodiment uses governor motion Adjust the whole height of elastic supporting piece, even if so that the present embodiment uses the slightly larger spring of error, also have only to adjusting Joint spiral cover is rotated in place, and can ensure the concordance of whole height.It addition, this structure is so that the present embodiment is in all Attached state, will not be scattered mutually and cause losing parts.

(embodiment 2)

The present embodiment is essentially identical with above-described embodiment 1, and difference is: as shown in Fig. 9 to Figure 12, in the present embodiment The first precision LOAD CELLS be still provided with the first fixed part, the first load deformations and be arranged in the first load deformations For detection the first load deformations deflection the first resistance strain gage；But the first precision weighing and sensing in the present embodiment The shape of device is similar to instead " G " font, and its first fixed part approximation " C " font, the shape of the first load deformations is similar to one Individual less " C " font, and be connected with the first fixed part, combination forms anti-" G " font.This kind the first precision LOAD CELLS Range is the most same as in Example 1 with accuracy value, and this structure also can be made by impact style, and its manufacturing process is simpler. The bottom adhesive of the first mounting seat is fixed with capping 12, and capping and the first mounting seat enclose formation one containing cavity 13, the first deck It is positioned in this containing cavity with the first precision LOAD CELLS；Capping include center hole 121, interior cover region 122, outer cover region 123, with And connecting interior cover region and a plurality of spiral elastic arm 124 of outer cover region, center hole is arranged at inner cap district center；In mounting plate portion Being provided with the cylinder table 321 projecting upwards formation at the heart, the periphery wall of cylinder table is bonded and fixed in center hole, the first load shape The crimping of change portion is arranged on the roof of cylinder table.Capping with holding part with the use of, the first precision being pointed in containing cavity claims Weight sensor is preferably protected.Further, since spiral elastic arm can be made sufficiently thin little, this kind of structure can fully subtract The power transmitted by capping between little first mounting seat and the cylinder table 321 of the second mounting seat so that it is the error impact caused is right For precision in second-order range, reach the degree ignored.

The present embodiment reduce further the structural requirement to the first precision LOAD CELLS, and simplifies assembly operation, Manufacturing cost can be reduced further.

(embodiment 3)

The present embodiment is substantially the same manner as Example 1, and difference is: as shown in Figure 13 to Figure 16, and the present embodiment is no longer Arranging static contact and moving contact, the periphery wall of upper supporting part no longer arranges annular pressure contact portion, bottom is not the most re-used as traveller portion Use.

In the present embodiment, the center of upper supporting part is provided with adjustment hole 513, the center of the tube shape bulge of lower supporting part, Being additionally provided with the circle from mounting plate portion is protruding upward and couple pylon 534, the roof center of this connection pylon is provided with connection screw 535；Tube shape bulge couples pylon and encloses formation annular spacing groove 536 with circle；The bottom of spring is positioned at this annular spacing groove, And be connected on lower supporting part, the top of spring is connected on the diapire of upper supporting part.

Being used in the present embodiment regulates the governor motion of elastic supporting piece height and only includes regulating screw 63, this regulation spiral shell Nail is sequentially provided with the portion of screwing 631, slide connecting part 632 and the spiro union portion 633 adaptive with adjustment hole from top to bottom, and the external diameter screwing portion is big In the external diameter of slide connecting part, the shape of slide connecting part is the cylinder that outer wall is smooth；The adjustment hole of described upper supporting part is stepped hole, from On be the bigger less slide opening district 5132 of crimping porose area 5131 and aperture, aperture the most successively, the diapire of crimping porose area is as pressure Junction 5133, slide opening district is the circular hole that hole wall is smooth；Described spiro union portion is spirally connected and is fixed in the connection screw coupling pylon；Freely During state, under the top pressure effect of spring, the portion of screwing is positioned in crimping porose area, and the diapire screwing portion is crimped on crimping porose area On diapire, namely on described electrolysis；Slide connecting part is then positioned in slide opening district；Under external force, slide connecting part can be in slide opening district Slide up and down, so that upper supporting part can move up and down under the guide effect of regulation screw slide connecting part.This structure is passed through Regulation screw is used to connect upper supporting part and lower supporting part so that elastic supporting piece will not lose parts because of split；Lead to simultaneously Cross this regulation screw of turn, can directly adjust between power of the leading pressure contact portion of the second mounting seat and power of the leading support of lower supporting part Clearance distance, its structure comparison compact and reasonable.

(embodiment 4)

The present embodiment is substantially the same manner as Example 3, and difference is: as shown in Figure 17 to Figure 18, due to regulation screw Tibetan is enclosed wherein, it is impossible to again tune after overall package by the second mounting seat and lower supporting part, so the regulation in the present embodiment Mechanism also includes regulating spiral cover 61 and to top spiral cover 62；The periphery wall of lower supporting part is provided with the stopper section 533 of evagination, leads and defeats The periphery wall meeting portion is provided with external screw thread district 311；The inwall of regulation spiral cover bottom is provided with the annular anticreep pressure contact portion of convex 611, the inwall on top is provided with and leads the internal threaded regions 612 that power pressure contact portion external screw thread district is adaptive；Described anticreep pressure contact portion is sheathed On the periphery wall being positioned at below stopper section of lower supporting part, top spiral cover is also screwed in the external screw thread district leading power pressure contact portion, It is positioned at the top of regulation spiral cover, and is connected to regulate on spiral cover；Under external force, described stopper section can led at the bottom of power pressure contact portion Hold and lead and slide up and down between power support top.During free state, lower supporting part, under the reseting elasticity effect of spring, makes Its anticreep pressure contact portion apical grafting is on stopper section, and when the first mounting seat pressure-bearing stress, stress is shortened by spring, the second mounting seat Leading power pressure contact portion by drive regulation spiral cover and to move down pushing up spiral cover, anticreep pressure contact portion 611 now moves down the most therewith, is positioned at backstop The lower section in portion 533.

(embodiment 5)

The present embodiment is substantially the same manner as Example 4, and difference is: as shown in Figure 19 to Figure 20, in the present embodiment First precision LOAD CELLS is still provided with the first fixed part, the first load deformations and is arranged in the first load deformations For detecting the first resistance strain gage of the first load deformations deflection；But the first precision LOAD CELLS in the present embodiment Shape be similar to instead " G " font, its first fixed part approximation " C " font, the shape of the first load deformations is similar to one Less " C " font, and be connected with the first fixed part, combination forms anti-" G " font.The amount of this kind the first precision LOAD CELLS Journey is the most same as in Example 1 with accuracy value, and this structure also can be made by impact style, and its manufacturing process is simpler.The The bottom adhesive of one mounting seat is fixed with capping 12, and capping and the first mounting seat enclose formation one containing cavity 13, the first deck and First precision LOAD CELLS is positioned in this containing cavity；Capping include center hole 121, interior cover region 122, outer cover region 123 and Cover region and a plurality of spiral elastic arm 124 of outer cover region in connecting, center hole is arranged at inner cap district center；The center of mounting plate portion Place is provided with the cylinder table 321 projecting upwards formation, and the periphery wall of cylinder table is bonded and fixed in center hole, the first load deformation Portion's crimping is arranged on the roof of cylinder table.Capping with holding part with the use of, the first precision being pointed in containing cavity is weighed Sensor is preferably protected.Further, since spiral elastic arm can be made sufficiently thin little, this kind of structure can fully reduce The power transmitted by capping between the cylinder table 321 of the first mounting seat and the second mounting seat so that it is the error impact caused is to the For precision in second order range, reach the degree ignored.

Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not right The restriction of embodiments of the present invention.For those of ordinary skill in the field, the most also may be used To make other changes in different forms.Here without also cannot all of embodiment be given exhaustive.And these Belong to obvious change that the connotation of the present invention extended out or variation still falls within protection scope of the present invention.

Claims

1. a double precision weighing electronic scale, including the support board for putting object to be claimed；It is characterized in that: also include arranging Base below support board and the setting double precision LOAD CELLS for supporting support board in the base；Each double precision claims Weight sensor includes crimping successively the first mounting seat of setting, the first precision LOAD CELLS, the second mounting seat, the second precision claim Weight sensor and elastic supporting piece；Elastic supporting piece includes upper supporting part, spring and lower supporting part, and the top of spring is connected to On supporting member, the bottom of elastic supporting piece is connected on lower supporting part；Second mounting seat is provided with leads power pressure contact portion, and lower supporting part sets Lead power support；Under free state, the power pressure contact portion of leading exceeds leads power support；By second during the second mounting seat pressure-bearing stress Precision LOAD CELLS compression spring, so drive lead defeat connect subordinate move, when the second mounting seat pressure-bearing stress is to predeterminable level Time, lead to defeat meeting subordinate and move to be crimped on and lead on power support.

Double precision weighing electronic scale the most according to claim 1, it is characterised in that: the range of the first precision LOAD CELLS Range more than the second precision LOAD CELLS.

Double precision weighing electronic scale the most according to claim 1, it is characterised in that: on the outer wall of each pair of rank LOAD CELLS Being provided with the clamping installation portion for installing self entirety, base is provided with buckling groove, and each pair of rank LOAD CELLS is installed by clamping Portion is fixed in a corresponding buckling groove.