CN2729665Y

CN2729665Y - Body weight weighing machine

Info

Publication number: CN2729665Y
Application number: CN 200420061340
Authority: CN
Inventors: 彭小勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-09-13
Filing date: 2004-09-13
Publication date: 2005-09-28
Anticipated expiration: 2014-09-13

Abstract

The utility model discloses a body weight weighing machine, compising a bottom case, a surface cover, a lever rack, a spring, a spring sensing display device, and a supporting rack. The displacement quantity of the spring is converted to a show value by the spring sensing display device. The surface cover covers the bottom case, the lever rack, the supporting rack, and the sensing display device are arranged in a cavity encircled by the surface cover and the bottom box. The supporting rack is used as a lever fulcrum to support the lever rack; the supporting rack passes through the bottom case and is actively connected with the bottom case along the vertical direction. The supporting rack is supported on the ground, the bottom case accepts the weight gravity and the force application coming from the display device to the lever rack, and forms a force application. The spring sensing display device displays the weigh value after the spring is stressed and creates a displacement. The surface cover only has the functions of simple load transfer and decoration. The bottom case used for load bearing is cheap. The body weight weighing machine has the advantages of omitting the iron surfac cover, reducing the cost, and improving the accuracy. The iron surfac cover is arranged in the general body weight weighing machine.

Description

Doctor's type scale

Technical field

The utility model relates to a kind of doctor's type scale.

Background technology

As shown in Figure 1, at present the common structure of spring scale is: the scale body that four scale pin of a usefulness are supporting, all parts of scale body all are contained in one and are called as on the box that the iron and steel of box is done at the bottom of the iron, are covered with the untouchable lid that a load-bearing is used at the bottom of the iron above the box; What have toply is covered with an ornamental plastics cover again; Article four, the lever bracket that is called as the length arm is delivered to the weight of people on the cover on the main dynamometer spring by a fixing scale down, be elongated after main dynamometer spring is stressed, the stroke of elongation is converted to display pointer by spring bit transition conversion equipment or shows that the rotation of rotating disk or numeral show the reading for the people.Wherein box and untouchable lid are the main load parts of scale at the bottom of the iron.Because untouchable lid will be passed to lever bracket with the body weight power of bearing, untouchable lid is generally point type with lever bracket and contacts, and inevitable requirement is untouchable like this is stamped good intensity.Inevitable requirement increased the weight of untouchable lid and improved requirement to material to reach requirement of strength this moment, increased the cost of product.In addition, because existing doctor's type scale measuring accuracy is the end of than, its measuring accuracy is generally 2～3%.Shown in Figure 25 a, two long-armed structures of conventional mechanical scale are just the same, be linked as a rigid body by brace, each has first strong point 1b and second strong point 2b respectively with box at the bottom of the iron, when main dynamometer spring is subjected to load deformation, makes two long-armedly to rotate around separately

strong point

1b, 2b respectively, but first strong point 1b and second strong point 2b be the corotation moving axis not, promptly not coaxial with the rotating shaft 3b of brace, can cause two long-armed rotations to interfere with each other like this, make to measure and forbidden.Shown in Figure 26 a, the desirable installation site of main dynamometer spring is, its central axis overlaps with the hang over axis of regulating rotating disk, but the main dynamometer spring structure of conventional mechanical scale, described arcwall face is big with contacted fillet R of hook and spring groove angle N, and the angle M of hook is big, is not easy to hang on the center line, its central axis just not exclusively overlaps with the hang over axis of regulating rotating disk, will bring the deviation of measurement.

Summary of the invention

The purpose of this utility model is exactly in order to overcome the above problems, and a kind of meausring apparatus and doctor's type scale of doctor's type scale is provided, and it can cancel untouchable lid, thereby has reduced cost.

The utility model realizes that the scheme of above-mentioned purpose is: a kind of doctor's type scale, comprise end box, cover, lever bracket, sensing display apparatus, bracing frame, sensing display apparatus comprises spring and spring sensing display apparatus, the spring sensing display apparatus converts the displacement of spring to demonstration numerical value, described cover covers end box, described lever bracket, bracing frame and sensing display apparatus are loaded in the cavity that face lid and bottom box surrounds, bracing frame is as balance pivot supporting lever bridge, this bracing frame passes end box and vertically flexibly connects with end box, it is supported in ground, spring and end box force in lever bracket, described cover is pressed on the end box, and box of the described end is pressed on the lever bracket, and described body weight gravity is passed to end box through cover, act on the lever bracket through end box again, with the application of force formation lever force of sensing display apparatus lever bracket.

The scheme that the utility model further proposes is: described sensing display apparatus comprises spring, regulate rotating disk, brace, spring displacement conversion equipment and display device, described lever bracket is fixed on the brace, brace is pressed on the spring displacement conversion equipment, display device receives the displacement of spring displacement conversion equipment and is converted into demonstration weight, one end of spring has hook, regulate rotating disk and comprise rotating shaft and rotating disk, at rotating shaft one end spring groove is arranged, the end face of spring groove comprises arcwall face, described hook is hung on the arcwall face, the angle of described hook is less than 120 degree, and described spring groove angle is less than the angle of hook.

Another program that the utility model further proposes is: the support of described lever bracket comprises two long-armed and two galianconism, one end of two galianconism is connected to the long-armed central authorities of homonymy, two long-armed is linked as a rigid body by brace, on described two long-armed and two galianconism first edge of a knife and second edge of a knife are arranged, described second edge of a knife is pressed on bracing frame, the opening direction of described two second long-armed edges of a knife is positioned on the first public rotation axis, described first edge of a knife passes the hole on the end box sidewall, end box sidewall is pressed on first edge of a knife, the opening direction of described two first long-armed edges of a knife is positioned on the second public rotation axis, and described first common pivot axis parallels with second common pivot axis.

Untouchable lid adopts the beneficial effect of above scheme: owing to can be omitted, body weight weight is passed through the stepless action of plastic cement cover on box at the bottom of the iron when weighing, and weight-bearing function is held concurrently with box at the bottom of the iron, and only make higher requirement to the structural rigidity of box at the bottom of the iron this moment, thereby can reduce cost; Its material cost can descend 15% with respect to similar spring scale commonly used at present.

Because the angle and the spring groove angle of hook reduce, the error range that spring departs from the center line of rotating shaft reduces, and that promptly reduces spring axis and the axis of regulating rotating disk does not overlap deviation, thereby reduces measured deviation, the measuring accuracy of raising spring.

Because two first long-armed common pivot axis parallel with second common pivot axis, can avoid two to interfere mutually between long-armed like this, improve the accuracy of measurement.

Stamp out the technology that many deep trouths are made box at the bottom of the iron owing to adopted, also solved box material thickness at the bottom of the reduction iron, satisfy the structural rigidity higher requirement from a whole iron plate.

Description of drawings

Fig. 1 is the three-dimensional explosive view of prior art doctor's type scale;

Fig. 2 is the three-dimensional explosive view of the utility model doctor's type scale;

Fig. 3 is the cover stereographic map of the utility model doctor's type scale;

Fig. 4 is the cover J-J cut-open view of the utility model doctor's type scale;

Fig. 5 is the cover K-K cut-open view of the utility model doctor's type scale;

Fig. 6 is the three-dimensional explosive view of the long-armed and supporting frame part of the utility model doctor's type scale;

Fig. 7 is the lever bracket and the bracing frame plane exploded view of the utility model doctor's type scale;

Fig. 8 is the long-armed of the utility model doctor's type scale and supporting frame part plane exploded view;

Fig. 9 is the galianconism and the bracing frame stereographic map of the utility model doctor's type scale;

Figure 10 is the galianconism and the bracing frame vertical view of the utility model doctor's type scale;

Figure 11 is the galianconism central plane of the utility model doctor's type scale and the C-C cut-open view of bracing frame;

Figure 12 is the vertical view (inner body is drawn as dotted line) of the utility model doctor's type scale;

Figure 13 is the utility model doctor's type scale central plane D-D cut-open view;

Figure 14 is the E-E cut-open view of the utility model doctor's type scale along long-armed central plane;

Figure 15 is the F-F cut-open view of the utility model doctor's type scale along the galianconism central plane;

Figure 16 is the pedestal first visual angle stereographic map of the utility model doctor's type scale;

Figure 17 is the pedestal second visual angle stereographic map of the utility model doctor's type scale;

Figure 18 is the pedestal vertical view of the utility model doctor's type scale;

Figure 19 is the G-G cut-open view of the utility model doctor's type scale along the pedestal center line;

Figure 20 is the sensing display apparatus front view of the utility model doctor's type scale;

Figure 20 a is the sensing display apparatus left view of the utility model doctor's type scale;

Figure 21 is the sensing display apparatus upward view of the utility model doctor's type scale;

Figure 22 is the H-H cut-open view of the sensing display apparatus of the utility model doctor's type scale along central plane;

Figure 23 is the three-dimensional explosive view of the sensing display apparatus of the utility model doctor's type scale;

Figure 24 is the end box xsect I-I cut-open view of the utility model doctor's type scale;

Figure 25 is the long-armed rotation relation synoptic diagram of the utility model doctor's type scale;

Figure 25 a is the long-armed rotation relation synoptic diagram of prior art;

Figure 26 is that the spring of the utility model doctor's type scale hangs over the synoptic diagram in the rotating shaft of regulating rotating disk;

Figure 26 a is that the spring of the doctor's type scale of prior art hangs over the synoptic diagram in the rotating shaft of regulating rotating disk;

Figure 27 is the stressed synoptic diagram of free beam;

Figure 28 is that the i shaped cross section moment of inertia is calculated synoptic diagram;

Embodiment

Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.

As shown in Figure 2, a kind of doctor's type scale, comprise end box 2, cover 1, lever bracket 3 and sensing display apparatus, bracing frame 4, sensing display apparatus comprises spring and spring sensing display apparatus, the spring sensing display apparatus converts the displacement of spring to demonstration numerical value, cover 1 covers end box 2, described lever bracket 3, bracing frame 4 and sensing display apparatus are loaded in the cavity that cover 1 and end box 2 surround, wherein cover 1 and end box 2 are as the body weight support member, cover 1 is pressed on the end box 2, end box 2 is pressed on a side of lever bracket 3, and body weight gravity is passed to end box 2 through cover 1, acts on the lever bracket 3 through end box 2 again.Bracing frame 4 is as balance pivot supporting lever bridge 3, this bracing frame 4 is loaded on the doctor's type scale, usually it is loaded on end box 2 upper supports in ground, bracing frame 4 is loaded on four jiaos the circular hole that is arranged in box 2 at the bottom of the iron in the present embodiment, this bracing frame 4 passes end box 2 and vertically flexibly connects with end box 2, sensing display apparatus is pressed on the opposite side of lever bracket 3, and described bracing frame 4 is at end box 2 and sensing display apparatus between the point of application to lever bracket 3, near end box 2 point of applications one side.Spring and end box 2 force in lever bracket 3, and described body weight gravity is passed to end box 2 through cover 1, and heavy power of end box 2 acceptors and sensing display apparatus form lever balance power to the application of force of lever bracket 3.As Fig. 3, Fig. 4 and shown in Figure 5, cover 1 is made by plastic material, cover 1 comprises lateral wall 102 and panel 101, lateral wall 102 is connected in the periphery of panel 101, inside surface at panel 101 has grid bar 103, this grid bar 103 plays the effect of strengthening cover 1 intensity, play simultaneously reduce its inner bottom surface degree of depth make its can with the contacted effect of bottom.As Fig. 2 and shown in Figure 24, end box 2 is a box 2 at the bottom of the iron, end box 2 comprises chassis 201 and sidewall 202, sidewall 202 is connected in the periphery on chassis 201, surround end box 2, described chassis 201 is the flat boards that some sagging grooves are arranged, the part that does not have to sink forms the flange 204 that along continuous straight runs stretches out, with muscle 205 protruding upward, lever bracket 3, sensing display apparatus and bracing frame 4 are arranged in groove, but lever bracket 3 does not directly contact with groove, described cover 1 inner bottom surface be pressed on the flange 204 of box of the described end 2 and the muscle 205 that protrudes on.Described muscle 205 comprises side muscle 251 and gluten 252, described gluten 252 links to each other with side muscle 251 and surrounds muscle 205, connecting place at side muscle 251 and gluten 252 has the arc corner, for muscle 205 and the flange 204 that guarantees these protrusions can create with simple process for stamping, each muscle 205 all has certain punching press gradient, and all there is enough big fillet all corners.On sidewall 202, have hole 203, lever bracket 3 comprises a plurality of poles 301, can select four poles 301, it is two long-armed and two galianconism, two long-armed is linked as a rigid body by brace (53), and an end of two galianconism is connected to the long-armed central authorities of homonymy, and wherein a side of each pole 301 has first edge of a knife 302, first edge of a knife 302 passes the hole 203 on the sidewall 202, and sidewall 202 is pressed on first edge of a knife 302.End this moment box 2 is pressed on a side of lever bracket 3.Extremely shown in Figure 11 as Fig. 6, bracing frame 4 comprises pedestal 401 and foot rest 402, the foot rest hole is arranged on pedestal 401, described foot rest 402 is the fork-shaped schistose texture, the one end inserts the foot rest hole of pedestal 401, and foot rest 402 is fixed on the pedestal 401, and stopper slot 403 is arranged on the other end of foot rest 402, second edge of a knife 303 is arranged on the pole 301 of lever bracket 3, and described second edge of a knife 303 is pressed in the stopper slot 403.Make lever bracket 3 be pressed on the foot rest 402.Article four, the lever bracket 3 of length arm is supported by four bracing frames 4 by circular hole on the box 2 at the bottom of the iron; On box at the bottom of the

iron

2,2 four perforates 203 of box are pressed on four length arm bar framves 3 human body weight of weighing at the bottom of the iron by 1 stepless action of plastics cover like this, and four length arm bar framves 3 pass to weight on four bracing frames 4 again.To shown in Figure 19, pedestal 401 comprises cylindrical body 411 and is fixed in the ring segment 412 of cylindrical body 411 circumference that described ring segment 412 is a corrugated tube shape as Figure 16.This bellows-like structure can produce the lower resistance displacement in vertical direction when stressed, outer rim at ring segment 412 has jack 413, this jack 413 inserts on the banking stop that stretches out from end box 2, and described pedestal (401) level is limited on the end box (2), and vertically lower resistance moves.Shown in Figure 25 and Figure 25 a because existing two long-armedly rotated around separately

strong point

1b, 2b respectively, not under the situation of corotation moving axis, cause two long-armed rotations to interfere mutually at two strong points, can make measure inaccurate.For the head it off present embodiment has adopted following scheme: the support of described lever bracket 3 comprises two long-armed and two galianconism, two long-armed is linked as a rigid body by brace 53, described two have second edge of a knife 303 on long-armed, described second edge of a knife 303 is pressed on bracing frame 4, the opening direction of described second edge of a knife 303 is positioned on the first public rotation axis 3a, the opening direction of described two first long-armed edges of a knife 302 is positioned on the second public rotation axis 4a, and the described first common pivot axis 3a parallels with the second common pivot axis 4a.Can reduce measuring error like this.Extremely shown in Figure 15 extremely shown in Figure 23 as Figure 12 with Figure 20, sensing display apparatus comprises spring 51 and spring sensing display apparatus, the spring sensing display apparatus comprises regulates rotating disk 52, brace 53, spring displacement conversion equipment and display device 55, in the present embodiment, make the weighing measurement element with spring, spring is stress deformation when weighing, and its distortion shows becomes the weight that is weighed up, this demonstration can be digital, also can be pointer-type or dial type.Two long-armed being fixed on the brace 53 of described lever bracket 3, an end of spring 51 links to each other with brace 53, and brace 53 withstands an end of spring 51.The utility model has changed the modes of emplacement of four traditional length arm bar framves 3, and it adopts the mode of upside down.Promptly the lever bracket of four length arms is below main dynamometer spring 51.Spring 51 is applied a power that makes progress, and when adopting extension spring, this moment, lever bracket 3 applied a pulling force from the bottom up by 53 pairs of springs 51 of brace.Then above main dynamometer spring 51, its application of force is directed downwards four length arm bar framves 3 of spring scale commonly used.Extension spring is applied a pulling force from top to bottom.Present embodiment medi-spring 51 has also adopted inverse manner.The other end of spring 51 has hook, regulate rotating disk 52 and comprise rotating shaft 521 and rotating disk 522, at rotating shaft 521 1 ends spring groove 523 is arranged, the end face of spring groove 523 comprises arcwall face, described hook is hung on the arcwall face, the spring displacement conversion equipment comprises rotating base 541, turret 542 and tie rod 543, described rotating base 541 is fixed in end box 2, turret 542 has rotating shaft, it is placed in the commentaries on classics hole of rotating base 541, turret 542 can relatively rotate pedestal 541 and rotate, turret 542 is converted to horizontal shift with the vertical displacement of spring, it comprises two orthogonal tie rod pivoted arm 542b and spring sway brace 542a, and brace 53 is positioned at the top of the spring sway brace 542a of spring displacement conversion equipment, withstands spring sway brace 542a.On tie rod pivoted arm 542b, rotating shaft is arranged, on the tie rod 543 collar is arranged, rotating shaft is placed on the collar, tie rod pivoted arm 542b transmission tie rod 543 produces displacement in the horizontal direction, on tie rod 543 driving cog is arranged, the gear on the driving cog transmission display device 55 drives display device 55 and rotates, thereby the generation reading, promptly display device 55 receives the displacement of spring displacement conversion equipment and is converted into demonstration weight.Shown in Figure 26 and Figure 26 a, in order to improve the bearing accuracy of main dynamometer spring 51, to reduce measured deviation, the angle M of described hook is less than 120 degree, and described spring groove 523 angle N are less than the angle M of hook.

In addition, in order to simplify installation process, artificial economization reduces cost during production and assembly, has hole 304 on long-armed, and an end of described galianconism inserts in this hole 304.

In order to make galianconism and long-armedly when not weighing, also to make main dynamometer spring be subjected to pulling force, stable counting starting point is provided when weighing, also comprise support spring 305, limited block 306 or groove are arranged on the described galianconism, described support spring 305 1 ends are limited on this limited block 306 or the groove, the hangers that raises up that has punching press to come out on end box 2, the other end of support spring 305 is placed in the hangers, and the other end of this support spring 305 is fixed in end box 2.

In such scheme, box 2 central authorities have arranged the muscle 205 of some protrusions by the position of length arm, display and main dynamometer spring at the bottom of the iron, and the degree of depth of box 2 is close at the bottom of the height of muscle 205 and the iron.And there is obvious flange 204 on four limits of box 2 at the bottom of iron.Adopt the theoretical foundation of this structure as follows:

As shown in figure 27, the mechanics of materials to the Calculation of Deflection formula of free beam is:

f = \frac{PL}{48 EI} .

Wherein each parameter is meant:

P: the pressure that acts on free beam

L: the distance between free beam two fulcrums

E: the elastic modulus of material

I: beam section is with respect to the inertia distance of beam center of deformation layer.

As shown in figure 28, be example with the i shaped cross section, the computing formula of inertia distance is:

I = \underset{S}{&Integral;} yxydS

With box at the bottom of the iron 2 than doing free beam, by amount of deflection and moment of inertia computing formula as can be known, if wanting the free beam distortion is that amount of deflection is constant, external force P is that the range of scale is constant again, free beam effective length L is that the span between the scale pin is constant again, at the bottom of the iron box 2 materials constant be that elastic modulus E is constant again, then have only keep iron at the bottom of box 2 constant with respect to the moment of inertia of center of deformation layer.By the moment of inertia computing formula as can be known, if box 2 is constant with respect to the moment of inertia of center of deformation layer at the bottom of will keeping iron, and reduces material consumption again, promptly reduce area S, then can be with the material two ends up and down that are arranged in away from the center of deformation layer as much as possible, I shape, channel-section steel type all are to select preferably.Be box 2 at the bottom of the iron of square box shaped for basic configuration, at the bottom of iron box 2 center arrangement the muscle 205 of some protrusions, the height of muscle 205 is dark as much as possible; Box 2 four limits add flange 204 at the bottom of iron, all are the ways of same meaning.

In a word, the utility model adopts such scheme, has following advantage:

1. owing to take to propose high-precision measure in many-side, increase than existing doctor's type scale precision.

Existing being generally between 2%～3%. The spring human body balance of this patent is 150Kg at range, After 10000 fatigue and cyclic of half range load, precision can reach ± and 1%, and satisfy other spring commonly used The quality requirement of formula scale.

2, its material cost descends 15% with respect to spring scale at present commonly used, and weight is corresponding alleviating also.

Take into full account packaging technology when 3, designing, manually reduce when having production and assembly, production capacity increase etc. are good The place.

Claims

1. doctor's type scale, comprise end box (2), cover (1), lever bracket (3), sensing display apparatus, bracing frame (4), sensing display apparatus comprises spring and spring sensing display apparatus, the spring sensing display apparatus converts the displacement of spring to demonstration numerical value, described cover (1) covers end box (2), described lever bracket (3), bracing frame (4) and sensing display apparatus are loaded in the cavity that cover (1) and end box (2) surround, bracing frame (4) is as balance pivot supporting lever bridge (3), this bracing frame (4) passes end box (2) and vertically flexibly connects with end box (2), it is supported in ground, spring and end box (2) force in lever bracket (3), it is characterized in that: described cover (1) is pressed on the end box (2), box of the described end (2) is pressed on the lever bracket (3), described body weight gravity is passed to end box (2) through cover (1), act on the lever bracket (3) through end box (2) again, with the application of force formation lever force of sensing display apparatus lever bracket (3).

2. doctor's type scale as claimed in claim 1, it is characterized in that: box of the described end (2) is pressed on a side of lever bracket (3), sensing display apparatus is pressed on the opposite side of lever bracket (3), described bracing frame (4) is positioned between the end box (2) and the point of application of sensing display apparatus to lever bracket (3), near end box (2) point of application one side.

3. doctor's type scale as claimed in claim 1 or 2, it is characterized in that: box of the described end (2) comprises chassis (201) and sidewall (202), sidewall (202) is connected in the periphery of chassis (201), surround end box (2), on described sidewall (202), have hole (203), described lever bracket (3) comprises a plurality of poles (301), one side of each pole (301) has first edge of a knife (302), described first edge of a knife (302) passes the hole (203) on the sidewall (202), and sidewall (202) is pressed on first edge of a knife (302).

4. doctor's type scale as claimed in claim 1 or 2, it is characterized in that: described bracing frame (4) comprises pedestal (401) and foot rest (402), foot rest (402) is fixed on the pedestal (401), described pedestal (401) level is limited on the end box (2), can vertically move freely, described lever bracket (3) is pressed on the foot rest (402); Stopper slot (403) is arranged on the described foot rest (402), on the pole (301) of described lever bracket (3) second edge of a knife (303) is arranged, described second edge of a knife (303) is pressed in the stopper slot (403).

5. doctor's type scale as claimed in claim 4 is characterized in that: described pedestal (401) comprises cylindrical body (411) and is fixed in the ring segment (412) of cylindrical body (411) circumference that described ring segment (412) is a corrugated tube shape.

6. doctor's type scale as claimed in claim 1 or 2, it is characterized in that: box of the described end (2) is a flat board that some sagging grooves are arranged, the part that does not have to sink forms the flange (204) that along continuous straight runs stretches out, with muscle (205) protruding upward, lever bracket (3), sensing display apparatus and bracing frame (4) are arranged in groove, described cover (1) be pressed on the flange (204) of box of the described end (2) and the muscle (205) that protrudes on.

7. doctor's type scale as claimed in claim 1 or 2, it is characterized in that: described cover (1) comprises lateral wall (102) and panel (101), described lateral wall (102) is connected in the periphery of panel (101), inside surface at panel (101) has grid bar (103), and described grid bar (103) is pressed on the muscle (205) and flange (204) of end box (2).

8. doctor's type scale as claimed in claim 1 or 2, it is characterized in that: the support of described lever bracket (3) comprises two long-armed and two galianconism, two long-armed is linked as a rigid body by brace (53), one end of two galianconism is connected to the long-armed central authorities of homonymy, on described two long-armed and two galianconism first edge of a knife (302) and second edge of a knife (303) are arranged, described second edge of a knife (303) is pressed on bracing frame (4), the opening direction of described two long-armed second edges of a knife (303) is positioned on the first public rotation axis (3a), described first edge of a knife (302) passes the hole on the end box sidewall, end box sidewall is pressed on first edge of a knife (302), the opening direction of described two long-armed first edges of a knife (302) is positioned on the second public rotation axis (4a), and described first common pivot axis parallels with second common pivot axis.

9. doctor's type scale as claimed in claim 1 or 2, it is characterized in that: described sensing display apparatus comprises spring (51), regulate rotating disk (52), brace (53), spring displacement conversion equipment and display device, described lever bracket is fixed on the brace (53), brace (53) is pressed on the spring displacement conversion equipment, display device receives the displacement of spring displacement conversion equipment and is converted into demonstration weight, one end of spring (51) has hook, regulate rotating disk (52) and comprise rotating shaft (521) and rotating disk (522), at rotating shaft (521) one ends spring groove (523) is arranged, the end face of spring groove (523) comprises arcwall face, described hook is hung on the arcwall face, the angle of described hook (M) is less than 120 degree, and described spring groove (523) angle (N) is less than the angle (M) of hook.

10. doctor's type scale as claimed in claim 8 is characterized in that: also comprise support spring (305), support spring (305) is supported between described galianconism and the end box (2).