CN1760628A - Flexible rule possessing high degree of stand firm - Google Patents
Flexible rule possessing high degree of stand firm Download PDFInfo
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- CN1760628A CN1760628A CN 200510061466 CN200510061466A CN1760628A CN 1760628 A CN1760628 A CN 1760628A CN 200510061466 CN200510061466 CN 200510061466 CN 200510061466 A CN200510061466 A CN 200510061466A CN 1760628 A CN1760628 A CN 1760628A
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Abstract
The flexible rule possesses body case. There is turning wheel inside the case. Winding type spring band is setup inside the wheel in advance. Reaching outside the wheel, external end of the spring band is connected to the end of the rule. Hook is set up in front of the rule. When being out of the body case, the rule is in configuration of concave convex radian; when being wrapped up on the turning wheel, the rule is spread in shape of plane. When being out of the body case, the rule is in configuration: arc in small radius in middle part; straight segments or segments in large radius extended at two sides. Thickness T1 of base material of steel band is 0.100mm larger than and equal to T1 smaller than and equal to 0.145mm. Relation between General slope parameter C and T1 is met condition of C larger than and equal to 108/ (62+1200T1). Degree of stand firm can be ensured at 9ft even more than 10ft. advantages are: wrapped up on the turning wheel smoothly, and easy of production.
Description
Technical field
The present invention relates to a kind of tape measure of auto retractable, especially the chi band that relates to the auto retractable tape measure, when this chi band level is pulled out, can its degree of standing upright be reached at least more than the 9ft by the weight of concavo-convex crooked radian configuration support itself of itself and the weight of front end chi hook.
Background technology
The tape measure of auto retractable is a kind of common tool of industries such as building, finishing, measurement.The tape measure of the type has a housing usually, is provided with a runner in the housing, presets nest rolling spring band in the runner, and stretch out outside the runner spring band outer end, and interconnects with the chi band.The chi band has a chi hook foremost, and the chi band is pulled out outside housing, and its square section is the configuration of concavo-convex crooked radian shape, rolling in housing on the runner, then concavo-convex arc of curvature shape can be unfolded shakeout into plane, smooth and easy in order to what reclaim.
Especially build, for the professional of repairs profession, have the characteristic of two aspects to seem particularly important in many characteristics of tape measure for the professional.The one, the preset length of chi band, it is related to the maximum length that tape measure once can be measured; The 2nd, the degree of standing upright of chi band.The degree of standing upright of chi band is meant, when chi band level is pulled out, can utilize the concavo-convex crooked radian configuration of itself, supports the weight of itself and the weight of front end chi hook, and the characteristic of the not avalanche that keeps standing upright.Obviously, have long degree of standing upright, measure easily when then helping the user one man operation as the chi band.Moreover the length of degree of standing upright has also become now an important indicator weighing chi band quality, thereby to the degree of standing upright of chi band, present demand is that the longer the better.
Based on demand to degree of standing upright, the U.S. Pat 6 of Stanley company, 324,769 disclose a technical solution about chi band degree of the standing upright aspect of tape measure, this patent with the width of chi band (1.10 "～1.5 "), highly (0.25 "～0.40 "), thickness (0.0045 "～0.0063 "), and the radius of the radian value (R1=0.30 "～0.60 "; R2=1.0 "～5.0 ") or the like list scope, demand degree of standing upright is at least more than the 10.5ft (3.2m), and one 97% crooked ratio.In fact satisfy the chi band of these conditions, can not guarantee more than the certain 10.5ft of degree of standing upright, for example get chi bandwidth 1.25 " (31.75mm); height 0.25 " (6.35mm), even the chi tape thickness is to get the thickest 0.0063 " (0.16mm); the chi band degree of standing upright that is drawn also can't reach the length of 10.5ft certainly.In other words, the width that Stanley sets, highly, thickness equidimension scope, basic with degree of standing upright 10.5ft direct relation not, just in these scopes, exist degree of standing upright to satisfy the above sub-fraction zone of 10.5ft.In fact, the factor that influences chi band degree of standing upright is more, and the concavo-convex crooked radian configuration of chi band, the thickness of chi band, hardness, chi hook weight or the like are all influential to the degree of standing upright of chi band.
Therefore, necessary the factor that influences chi band degree of standing upright is studied, come to determine the tape measure that how could design, to produce degree of standing upright excellence, to satisfy the requirement of user degree of standing upright.
Summary of the invention
One of technical matters to be solved by this invention is to provide a kind of tape measure with high degree of stand firm at the prior art present situation, and the chi band of this tape measure has default crooked radian configuration and reaches at least 9 feet to guarantee its degree of standing upright.
Two of technical matters to be solved by this invention is to provide a kind of tape measure with high degree of stand firm at the prior art present situation, and the chi band of this tape measure has default crooked radian configuration and reaches at least 10 feet to guarantee its degree of standing upright.
Three of technical matters to be solved by this invention is to provide a kind of tape measure with high degree of stand firm at the prior art present situation, the chi band of this tape measure has default crooked radian configuration and reaches at least 9 feet to guarantee its degree of standing upright, also can guarantee simultaneously the chi band swimmingly rolling on runner.
Four of technical matters to be solved by this invention is to provide a kind of tape measure with high degree of stand firm at the prior art present situation, the chi band of this tape measure has default crooked radian configuration and reaches at least 10 feet to guarantee its degree of standing upright, also can guarantee simultaneously the chi band swimmingly rolling on runner.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: this has the tape measure of high degree of stand firm, it has housing, be provided with runner in the housing, preset nest rolling spring band in the runner, stretch out outside the runner outer end of spring band, and interconnect with the chi end of tape, the chi band be provided with the chi hook foremost; The chi band is pulled out outside housing, is the configuration that concavo-convex radian is arranged, and on the runner of rolling in housing, then be unfolded spread out into plane; The configuration of chi band is symmetria bilateralis, and it is characterized in that described chi band pulls out being configured as under the state: the center section in chi band cross section is one section small-radius arc, and it has radius value R
1And start point 2 α, symmetria bilateralis is extended with straight-line segment or one section large radius arc, and it uses radius R
2And start point θ represents that the situation of straight-line segment is R then
2Be infinity, start point is 0 degree; Chi band ground thickness of strips T
1For: 0.100mm≤T
1≤ 0.145mm, and total gradient parameters C of chi band and chi band ground thickness of strips T
1Between satisfy:
C≥108/(62+1200T
1) (1)
Total gradient parameters C is in the formula (1): C=2 (S
1t
1+ S
2t
2)/W (2)
T in the formula (2)
1Become the gradient of line segment AB: t with the terminal B line of small-radius arc one side for the mid point A of small-radius arc
1=tan β
1(3)
T in the formula (2)
2Become the gradient of line segment BC: t with another end points C line of described straight-line segment or large radius arc for described terminal B
2=tan β
2(4)
S in the formula (2)
1The arc length of ordering to B for described A point: S
1=R
1α (5)
S in the formula (2)
2The arc length of ordering to C for described B point: S
2=R
2θ (6)
Perhaps, the situation of straight-line segment S then
2Length for described line segment BC: S
2=W/2-S
1(7)
W is the width under the described chi band horizontal development state in the formula (2): W=2 (S
1+ S
2) (8)
β in the formula (3)
1Angle for line segment AB and surface level;
β in the formula (4)
2Angle for line segment BC and surface level;
Above-mentioned various in the unit of each length, width, arc length and radius parameter be mm, the unit of angle parameter is a radian.
Described total gradient parameters C and chi band ground thickness of strips T
1Between satisfy: C 〉=120/ (62+1200T
1).
Described total gradient parameters C under the width W of chi band horizontal development state with chi band ground thickness of strips T
1Between satisfy: W/C 〉=15.5+300T
1Or C≤W/ (15.5+300T
1).
With reference to figure 3, help to understand each above-mentioned parameter.As seen from Figure 3, the crooked radian configuration of chi band is monosymmetric, and the centre is a less circular-arc line segment, has a radius value R
1And angle 2 α that launch.The line segment that extends to symmetry of both sides can be bigger circular-arc, uses radius R
2And start point θ represents; Also can adopt the line segment of linearity, just radius R
2Be infinitely great, start point θ is 0 degree.See again with reference to shown in Figure 3, middle small-radius arc partly, radius is R
1, the center of circle is O
1, angle [alpha] is exactly line segment O
1A and line segment O
1The angle of B.The radius of the extension, both sides of symmetry is R
2, its center of circle is at O
2On, angle θ is exactly line segment O
2B and line segment O
2The angle of C.S
1What represent is to have radius R from the A point to the B point
1Arc length, S
2What represent is to have radius R from the B point to the C point
2Arc length, if straight-line segment, S
2Be exactly the length of line segment BC.The horizontal width that the A point is ordered to B is W
1, vertical height is H
1The horizontal width that the B point is ordered to C is W
2Vertical height is H
2H represents the overall height of chi band radian.In addition, with reference to as can be known shown in Figure 4, W represents the width of chi band chi band when launching to spread out into plane configuration, and T represents that the chi band contains the gross thickness of baking vanish or other clad, T
1Representative does not have the thickness of the chi band ground steel band of baking vanish or other clad.
After deliberation, our factor of finding to influence chi band degree of standing upright probably has the concavo-convex arc constructure of width, thickness, hardness, chi hook weight and the chi band of chi band.Here, we will not discuss the influence of chi hook weight, and will be less to the influence of degree of standing upright because the weight of different chi hooks does not generally have too big difference, and the measurement of degree of standing upright has comprised chi hook weight of portions.So the emphasis that we investigate just at width, the thickness of chi band, reach these three factors of concavo-convex arc constructure.Wherein most important part is exactly the concavo-convex arc constructure of chi band, also is the emphasis of our demand.
That is to say that we find to influence after deliberation, and most important factor is the concavo-convex crooked radian configuration of chi band in the factor of chi band degree of standing upright.Desirable concavo-convex arc constructure can be strengthened degree of standing upright, and allows degree of standing upright reach gratifying length, and this also has the limit to exist certainly, and this is because the chi band also needs to be reclaimed swimmingly, and shakeouts rolling above runner.So except reinforcement degree of standing upright is a target, also need consider practicality, promptly need to allow the chi band successfully be recovered rolling on runner.Too high degree of standing upright represents that its concavo-convex radian is crooked more, also just difficult more by rolling on runner.
We find to adopt the concavo-convex arc constructure of chi band of the present invention, at chi band ground thickness of strips T via the size and the parameter of the concavo-convex arc constructure of chi band of research, analysis tape measure
1Under certain situation, it is very little that degree of the standing upright L of chi band catches up with the variation of ratio of total gradient parameters C of stating definition, is a constant substantially.Such as, at chi band ground thickness of strips T
1Under the 0.115mm situation, this ratio approximates 200 (T
1With mm is unit, and L is a unit with inch inch).That is to say, at chi band ground thickness of strips T
1Under the 0.115mm situation,, then only need total gradient parameters C of the concavo-convex arc constructure of designed chi band getting final product more than 0.54 if guarantee that it is more than the 9ft at least that degree of standing upright L reaches.Similarly, at chi band ground thickness of strips T
1Under the 0.115mm situation,, then only need total gradient parameters C of the concavo-convex arc constructure of designed chi band getting final product more than 0.6 if guarantee that it is more than the 10ft at least that degree of standing upright L reaches.
This shows that total gradient parameters C value can be used for estimating the length of chi band degree of standing upright.Whether that is to say, if we wish that the degree of standing upright of the chi band made reaches a certain preset value, need not as in the past to have only after production is finished by the time, it is qualified just to know its degree of standing upright through actual measurement.Present then the design phase can according to the design the total gradient parameters C of dimensional parameters data computation value, see whether the C value meets the requirements, and then adjustment designs and suitable change supplemental characteristic can reach target, has saved loaded down with trivial details sample making process, has especially reduced the waste of mould.A real example is: we use W=41.3mm, T
1The chi band of=0.115mm, degree of the standing upright 11ft of setting (L=132 ").The ratio of L/C approximates 200 condition above utilizing, and can draw total gradient parameter and should get C=0.66.The dimensional parameters data of the chi band of design are as follows: R
1=15mm, α=40.5 °, R2=75mm, θ=7.68 °, S
1=10.60mm, S
2=10.05mm, t
1=0.369, t
2=0.977, can extrapolate total gradient parameter like this is C=0.665, utilizes L/C to approximate 200 ratio and calculates its degree of standing upright about 133 ".Through producing sample, the chi band gross thickness T after coating through baking vanish is between 0.15mm～0.16mm, and the chi band degree of standing upright that actual amount is measured, length value L is about 132 ", as seen its to estimate accuracy quite high.
In addition, when considering degree of standing upright, if get rid of the thickness and the hardness of chi carrying material, this is unpractical, but these two adjustable being limited in scope of factor, according to existing skill, chi band ground thickness of strips T
1Nearly all in the scope of 0.100mm～0.145mm, hardness then between HV510～HV570, less than concavo-convex arc constructure come important.From another viewpoint, concavo-convex radian utilizes mould to extrude during production, the meaning is exactly that concavo-convex arc constructure is once configure, just be difficult for change, consider, also should not change from the economy angle, but the thickness of material and hardness, then can adjust according to circumstances, just identical concavo-convex radian mould can be used for producing the chi band of different-thickness and hardness.
Below we will discuss is chi band ground thickness of strips T
1Influence to degree of standing upright.At first we are noted that why we only consider chi band ground thickness of strips, rather than the gross thickness of consideration control chi band (containing baking vanish or clad), because the hardness of baking vanish or other clad is come for a short time more than the hardness of ground steel band, just baking vanish or other clad are also little to the influence of degree of standing upright, so the influence factor that we only need the ground thickness of strips is discussed gets final product.Find after deliberation, corresponding to different chi band ground thickness of strips T
1, as long as the total gradient parameters C and the T of chi band
1Between satisfy C 〉=108/ (62+1200T
1), the degree of standing upright that then can guarantee the chi band is 9ft at least, in like manner, if the degree of standing upright that requires the chi band is 10ft at least, then as long as the total gradient parameters C and the T of chi band
1Between satisfy C 〉=120/ (62+1200T
1) get final product.The most direct method that draws of this conclusion is exactly actual test.
At first, we control and use the identical concavo-convex arc constructure of chi band, control its hardness in identical grade, similarly baking vanish and chi hook weight or the like, just only change the thickness of ground steel band.Under be the example of two tests, the one, width is the chi band of 25mm, when the ground thickness of strips is 0.115mm, the degree of standing upright that measures about 97 " long, if but the ground steel band is used the grade of 0.100mm thickness instead, its chi band degree of standing upright can shorten about 88 " about.If the ground steel band is used the grade of 0.130mm thickness instead, its chi band degree of standing upright can be lengthened to about 106 " about.Obviously, the ground strip material of used thickness 0.115mm is a benchmark, thickness reduces or increases 0.015mm (be about 0.115mm 13%), and when becoming 0.100mm or 0.130mm, its chi band degree of standing upright is corresponding to be reduced approximately or increase by 9 " length (be about 98 " 9%).Another concrete instance is the chi band of width 41.3mm, if the ground strip material of used thickness 0.115mm, its degree of standing upright is about 132 " about; but when using thickness instead and being the ground strip material of 0.130mm or 0.145mm; its degree of standing upright will extend 12 " or 24 " to about 144 " or 156 " degree, similarly, be as the criterion; during the about 0.015mm of the every increase of thickness (13%) the corresponding rough increase by 12 of understanding of degree of standing upright with 0.115mm thickness " length of (9%).
Two examples can simply be summarized as follows the result, are exactly chi band when using identical concavo-convex crooked radian configuration, and the C value is fixed, and works as thickness T
1When being 0.115mm, L/C ratio is about 200, when variation in thickness about 13%, when i.e. increase or minimizing 0.015mm, it is about 9% that degree of standing upright can increase relatively or reduce, and the ratio of expression L/C also needs to be changed to relatively 218 (increasing by 9%) or 182 (reducing 9%), and these conditions are utilized the linear regression method of mathematics, L/C ratio relation formula in the time of can obtaining considering the thickness factor simply is expressed as follows:
L/C＝62+1200T
1?or?C＝L/(62+1200T
1)
This shows, at different chi band ground thickness of strips, if equally need degree of standing upright 9ft or more than the 10ft, the value of so total gradient parameters C just should need to revise accordingly, has so just obtained the total gradient parameters C and the T of chi band at least
1Between need satisfy C 〉=108/ (62+1200T
1) or C 〉=120/ (62+1200T
1) conclusion.
In addition, we find that also the W/C value is an important ratio.At first we explain the meaning of this ratio representative, W is that the chi band launches to shakeout the width under the state, C is total gradient parameter value, and the concavo-convex crooked radian of the big more expression chi of C value band can be big more, and in fact the C value under the certain situation of chi band ground thickness of strips is and an irrelevant constant of size.The front we have found that, if require higher degree of standing upright, so also just needs bigger C value.But for the wide inadequately chi band of width, if its concavo-convex arc constructure is crooked excessive, then the chi band can't be launched into plane configuration at all smoothly, and just the chi band is difficult to be furled on runner swimmingly.Based on this reason, the chi band wants safety to be recovered in the housing smoothly, we find, at chi band ground thickness of strips is under the 0.115mm situation, the ratio of W/C should not be less than 50, too small W/C value, the danger that will cause the chi band to be difficult to be recovered strengthens, after setting like this, as the degree of standing upright of wishing the chi band is at least more than the 9ft, or perhaps the C value is more than at least 0.54, the plane configuration width that then can reason out the chi band is at least more than the 27mm, and as the degree of standing upright of wishing the chi band at least more than the 10ft, or perhaps the C value is more than at least 0.60, the plane configuration width that then can reason out the chi band is at least more than the 30mm.Therefore, ratio W/C is not less than the condition of a certain definite value, can assist us to find better chi band radian basically, and does not worry because crooked radian is excessive, to such an extent as to it is smooth and easy and efficient by rolling to cause the chi band to be difficult to.
Beneath we also have concrete instance can verify this point, and each dimensional parameters of the concavo-convex radian configuration of chi band is as follows: width W=35mm, T1=0.115mm, center section radius R
1=11.5mm, angle α=45 °, both sides radius R
2=45mm, S can be calculated in angle theta=10.78 °
1=9.03mm, S
2=8.47mm, t
1=0.414, t
2=1.208, its total gradient parameter of such configuration is C=0.798, and degree of standing upright length almost can reach the length of 4m.Equal 43.86 so calculate the ratio of W/C.Actual the chi band is assembled up, can find that the chi band is difficult to be shakeout into fully plane at all, runner is difficult to round and round with smooth the winding of chi band.
Identical reason, whether can thickness also influence the smooth degree that chi is taken back receipts? be actually, under the identical concavo-convex arc constructure of chi band, under the identical chi band baking vanish or other clad condition, chi band ground thickness of strips is thick more, difficultly more be launched into planely, just be difficult to more by rolling successfully on runner.Same is that the chi band of 0.115mm is a benchmark with the ground thickness of strips, and we set the condition that will be able to reclaim the chi band smoothly is that W/C ratio must not be less than 50.When the thickness of ground steel band increased, its difficulty of shakeouing increased, and has been exactly the ratio of representing this W/C, should relatively adjust increase; When the ground thickness of strips reduced, this ratio just can reduce again, and similarly, we can utilize the variation relation of ground thickness of strips and degree of standing upright, the adjustment of W/C value when handling because of the variation of ground thickness of strips.For example: the ground thickness of strips becomes at 0.130 o'clock by 0.115, increases by 0.015 (about 13%), and this moment, the ratio 50 of W/C can increase approximately 9% relatively, and promptly Δ (W/C)=50 * 0.09=4.5 extrapolates Δ (W/C)/Δ T thus
1=4.5/0.015=300.Therefore drawing the width W under the chi band horizontal development state and the ratio of described total gradient parameters C need satisfy: W/C 〉=15.5+300T
1Or C≤W/ (15.5+300T
1).In fact this ratio just furnishes us with the reference in when design, avoids because raising degree of standing upright simply, and ignores the problem that chi is taken back receipts.
Compared with prior art, the invention has the advantages that: even 1, the chi band degree of standing upright of tape measure reaches at least 9 feet at least 10 feet, also can guarantee simultaneously the chi band swimmingly rolling on runner; 2, the concavo-convex arc constructure of chi band at the chi band is under the configuration situation of the present invention, can be by the calculating of total gradient parameters C value and W/C value, adjust concrete dimensional parameters, reach at least 9 feet at least 10 feet even make the chi band of the tape measure of manufacturing out have default crooked radian configuration to guarantee its degree of standing upright, also can guarantee simultaneously the chi band swimmingly rolling on runner.And at the concrete concavo-convex radian of chi band of chi band also is under the concrete dimensional parameters situation about determining, also can by in the concrete production run to the selection of chi band ground thickness of strips, on same mould, manufacture out tape measure with different chi band degree of standing upright, thus both economical.
Description of drawings
Fig. 1 is the structural representation of embodiment of the invention tape measure;
Fig. 2 is the right view of tape measure shown in Figure 1;
Fig. 3 is that the chi band level of tape measure among Fig. 1 is pulled out the cross sectional representation under the state;
Fig. 4 launches to shakeout cross sectional representation under the state for chi band among Fig. 3.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
By Fig. 1, as seen shown in Figure 2, embodiment of the invention tape measure has housing 1, is provided with runner 2 in the housing 1 and (please marks each component names in the figure that you provide, thanks! ), preset nest rolling spring band 3 in the runner 2, stretch out outside the runner 2 outer end of spring band 3, and interconnect with chi band 4 ends, chi band 4 be provided with chi hook 5 foremost.With reference to figure 3, Fig. 4 as seen, chi band 4 is pulled out outside housing 1, is the configuration that concavo-convex radian is arranged, and on the runner 2 of rolling in housing 1, then be unfolded spread out into plane.As seen from Figure 3, the crooked radian configuration of chi band 4 is monosymmetric, and the centre is a less circular-arc line segment, has a radius value R
1And angle 2 α that launch.Both sides extend to the bigger circular-arc of symmetry, use radius R
2And start point θ represents; Also can adopt the line segment of linearity, just radius R
2Be infinitely great, start point θ is 0 degree.See with reference to shown in Figure 3 middle arc radius R partly again
1The center of circle be O
1, angle [alpha] is exactly line segment O
1A and line segment O
1The angle of B.The radius R of the extension, both sides of symmetry
2, its center of circle is at O
2On, angle θ is exactly line segment O
2B and line segment O
2The angle of C.S
1What represent is to have radius R from the A point to the B point
1Arc length, S
2What represent is to have radius R from the B point to the C point
2Arc length, if straight-line segment, S
2Be exactly the length of line segment BC.The horizontal width that the A point is ordered to B is W
1, vertical height is H
1The horizontal width that the B point is ordered to C is W
2Vertical height is H
2H represents the overall height of radian.In addition, with reference to as can be known shown in Figure 4, W represents the width of chi band 4 chi band 4 when launching to spread out into plane configuration, and T represents that chi band 4 contains the gross thickness of baking vanish or other clad 6, T
1Representative does not have the thickness of the chi band ground steel band 7 of baking vanish or other clad 6.
Following structure according to above-mentioned tape measure provides 9 specific embodiments and 8 Comparative Examples at the configuration of chi band, lists in table 1 and the table 2 respectively.
By in the table as seen, in the table 1 degree of standing upright of all specific embodiment tape measures all more than 9ft, the long 13ft that reaches, and through the reality use, it all can be furled on runner swimmingly.
Comparative Examples shown in the table 2 is used, is measured through reality, finds: the Comparative Examples 1～4 in the Comparative Examples, though it can be furled on runner swimmingly, degree of standing upright is undesirable; 5 of Comparative Examples not only degree of standing upright have deficiency slightly, and can not be furled swimmingly on runner at all; Though 6～8 degree of standing upright of Comparative Examples meet the requirements, be difficult to be furled on runner swimmingly.
Table 1 specific embodiment
| ? No. | W ? (mm) | R 1? (mm) | α ? (°) | R 2? (mm) | θ ? (°) | S 1? (mm) | S 2? (mm) | T 1? (mm) | ? t 1 | ? t 2 | ? C | ? L Measured value(in) | ?L’ Calculated value? ?(in) | ? L/C(in) | W/C ? (mm) |
| 1 | 27 | 12 | 39 | ∞ | 0 | 8.168 | 5.332 | 0.115 | 0.354 | 0.810 | 0.534 | 108(9ft) | 106.8 | 202.2 | 50.6 |
| 2 | 28 | 12.75 | 39 | 60 | 4.87 | 8.679 | 5.100 | 0.115 | 0.354 | 0.883 | 0.550 | 110(9.2ft) | 110 | 200 | 50.9 |
| 3 | 32 | 12 | 42 | 80 | 5.16 | 8.796 | 7.205 | 0.115 | 0.384 | 0.900 | 0.616 | 124(10.3ft) | 123.2 | 201.3 | 51.9 |
| 4 | 32 | 12 | 40.5 | 50 | 8.62 | 8.482 | 7.522 | 0.100 | 0.369 | 0.993 | 0.662 | 120(10ft) | 120.5 | 181.3 | 48.3 |
| 5 | 32 | 13 | 40 | ∞ | 0 | 9.076 | 6.920 | 0.130 | 0.364 | 0.839 | 0.570 | 123(10.3ft) | 124.3 | 215.8 | 56.1 |
| 6 | 35 | 13 | 40 | 50 | 9.65 | 9.076 | 8.421 | 0.100 | 0.364 | 0.994 | 0.667 | 122(10.2ft) | 121.4 | 182.9 | 52.5 |
| 7 | 41.3 | 15 | 40.5 | 75 | 7.68 | 10.60 | 10.05 | 0.115 | 0.369 | 0.977 | 0.665 | 132(11ft) | 133 | 198.5 | 62.1 |
| 8 | 41.3 | 15 | 40.5 | 75 | 7.68 | 10.60 | 10.05 | 0.130 | 0.369 | 0.977 | 0.665 | 144(12ft) | 145 | 216.5 | 62.1 |
| 9 | 41.3 | 15 | 40.5 | 75 | 7.68 | 10.60 | 10.05 | 0.145 | 0.369 | 0.977 | 0.665 | 156(13ft) | 156.9 | 234.6 | 62.1 |
Table 2 Comparative Examples
| ? No. | W ? (mm) | R 1? (mm) | α ? (°) | R 2? (mm) | θ ? (°) | S 1? (mm) | S 2? (mm) | T 1? (mm) | ? t 1 | ? t 2 | ? C | ? L Measured value(in) | ?L’ Calculated value? ?(in) | ? L/C(in) | W/C ? (mm) |
| 1 | 19 | 11.5 | 27.5 | ∞ | 0 | 5.520 | 3.980 | 0.115 | 0.245 | 0.521 | 0.360 | 72(6ft) | 72.0 | 200 | 52.8 |
| 2 | 22 | 11.5 | 31.5 | ∞ | 0 | 6.322 | 4.678 | 0.115 | 0.282 | 0.613 | 0.423 | 85(7.1ft) | 84.6 | 200.9 | 52.0 |
| 3 | 25 | 12 | 36 | ∞ | 0 | 7.540 | 4.960 | 0.100 | 0.325 | 0.727 | 0.484 | 88(7.3ft) | 88.1 | 181.8 | 51.7 |
| 4 | 25 | 12 | 36 | ∞ | 0 | 7.540 | 4.960 | 0.115 | 0.325 | 0.727 | 0.484 | 97(8.1ft) | 96.8 | 200.4 | 51.7 |
| 5 | 25 | 12 | 36 | ∞ | 0 | 7.540 | 4.960 | 0.130 | 0.325 | 0.727 | 0.484 | 106(8.9ft) | 105.6 | 219.0 | 51.7 |
| 6 | 28 | 12.75 | 39 | 60 | 4.87 | 8.679 | 5.100 | 0.130 | 0.354 | 0.883 | 0.550 | 120(10ft) | 119.9 | 218.2 | 50.9 |
| 7 | 35 | 11.5 | 45 | 45 | 10.78 | 9.03 | 8.47 | 0.115 | 0.414 | 1.208 | 0.798 | 158(13.2ft) | 159.6 | 198 | 43.86 |
| 8 | 35 | 13 | 40 | 50 | 9.65 | 9.076 | 8.421 | 0.145 | 0.364 | 0.994 | 0.667 | 156(13ft) | 157.4 | 233.9 | 52.5 |
Claims (3)
1, a kind of tape measure with high degree of stand firm, it has housing, is provided with runner in the housing, presets nest rolling spring band in the runner, stretch out outside the runner outer end of spring band, and interconnect with the chi end of tape, the chi band be provided with the chi hook foremost; The chi band is pulled out outside housing, is the configuration that concavo-convex radian is arranged, and on the runner of rolling in housing, then be unfolded spread out into plane; The configuration of chi band is symmetria bilateralis, and it is characterized in that described chi band pulls out being configured as under the state: the center section in chi band cross section is one section small-radius arc, and it has radius value R
1And start point 2 α, symmetria bilateralis is extended with straight-line segment or one section large radius arc, and it uses radius R
2And start point θ represents that the situation of straight-line segment is R then
2Be infinity, start point is 0 degree; Chi band ground thickness of strips T
1For: 0.100mm≤T
1≤ 0.145mm, and total gradient parameters C of chi band and chi band ground thickness of strips T
1Between satisfy:
C≥108/(62+1200T
1) (1)
Total gradient parameters C is in the formula (1): C=2 (S
1t
1+ S
2t
2)/W (2)
T in the formula (2)
1Become the gradient of line segment AB: t with the terminal B line of small-radius arc one side for the mid point A of small-radius arc
1=tan β
1(3)
T in the formula (2)
2Become the gradient of line segment BC: t with another end points C line of described straight-line segment or large radius arc for described terminal B
2=tan β
2(4)
S in the formula (2)
1The arc length of ordering to B for described A point: S
1=R
1α (5)
S in the formula (2)
2The arc length of ordering to C for described B point: S
2=R
2θ (6)
Perhaps, the situation of straight-line segment S then
2Length for described line segment BC: S
2=W/2-S
1(7)
W is the width under the described chi band horizontal development state in the formula (2): W=2 (S
1+ S
2) (8)
β in the formula (3)
1Angle for line segment AB and surface level;
β in the formula (4)
2Angle for line segment BC and surface level;
Above-mentioned various in the unit of each length, width, arc length and radius parameter be mm, the unit of angle parameter is a radian.
2, the tape measure with high degree of stand firm according to claim 1 is characterized in that described total gradient parameters C and chi band ground thickness of strips T
1Between satisfy: C 〉=120/ (62+1200T
1).
3, the tape measure with high degree of stand firm according to claim 1 and 2 is characterized in that the ratio of width W under the described chi band horizontal development state and described total gradient parameters C satisfies: W/C 〉=15.5+300T
1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510061466 CN1760628A (en) | 2005-11-08 | 2005-11-08 | Flexible rule possessing high degree of stand firm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510061466 CN1760628A (en) | 2005-11-08 | 2005-11-08 | Flexible rule possessing high degree of stand firm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1760628A true CN1760628A (en) | 2006-04-19 |
Family
ID=36706786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510061466 Pending CN1760628A (en) | 2005-11-08 | 2005-11-08 | Flexible rule possessing high degree of stand firm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1760628A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108917653A (en) * | 2018-03-20 | 2018-11-30 | 刘红阳 | Rotational angle measurement method and device |
| CN111758011A (en) * | 2018-02-13 | 2020-10-09 | 米沃奇电动工具公司 | Tape measure with tear resistant tape edge |
-
2005
- 2005-11-08 CN CN 200510061466 patent/CN1760628A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111758011A (en) * | 2018-02-13 | 2020-10-09 | 米沃奇电动工具公司 | Tape measure with tear resistant tape edge |
| US11566879B2 (en) | 2018-02-13 | 2023-01-31 | Milwaukee Electric Tool Corporation | Tape measure with tear resistant tape blade edge |
| US11846503B2 (en) | 2018-02-13 | 2023-12-19 | Milwaukee Electric Tool Corporation | Tape measure with tear resistant tape blade edge |
| CN108917653A (en) * | 2018-03-20 | 2018-11-30 | 刘红阳 | Rotational angle measurement method and device |
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