CN2033750U - Adjustable indicating scale - Google Patents

Abstract

The utility model discloses a scale having the function of proportion adjustment; the task is that the disadvantage of little proportional kinds of a present scale is overcome, providing the scale having at least thirty kinds of working standard proportion; the problems that a plurality of time of the scaling in the plotting working is wasted, and the speed of the plotting is difficult to be improved are solved. The utility model is characterized in that a scaling and proportion regulating mechanism with similar triangle type is arranged in the scale. The utility model can be arranged on the plotter or can be used as a single replacing a straightedge and a triangular scale.

Description

Adjustable indicating scale

The utility model relates to a kind of improved engineer's scale, particularly a kind of engineer's scale that is provided with ratiometric conversion and ratio control device.

Existing engineer's scale mainly is a three-square rule, is carved with six kinds of different scale graduations on its three faceted pebbles.But because the ratio that Graphing of Engineering is adopted is a lot, the ratio that every profession and trade is used always is also inconsistent, generally speaking, even standard proportional commonly used also reaches kind more than 20.Therefore, three-square rule can not satisfy the needs of real work.In addition, three-square rule can only be used to measure size, can not be used for setting-out; Its scale does not meet people's visual custom yet, and intuitive is poor.Because three-square rule limitation in use, to cause drawing work to become loaded down with trivial details unusually, when on drawing, painting a certain line segment, the drawing personnel often will convert to actual size earlier in proportion, and the common appearance tens of drawing, hundreds of even thousands of line segments, this extremely conversion of trouble certainly will consume a large amount of time and efforts of drawing personnel, becomes the outstanding problem that influences the engineering design progress.

The purpose of this utility model be to provide a kind of intuitively, can replace ruler and be directly used in engineer's scale setting-out, that have ratiometric conversion and ratio control device, it not only can satisfy the proportion requirement of any Graphing of Engineering, and can reduce the drawing operation, shorten the non-cutting time of drawing.

The utility model designs according to the proportional principle of similar triangles corresponding sides: as shown in Figure 1, two triangle △ ABC with common angles are similar with △ ADE, AD:AB=DE:BC is then arranged, and AB is a constant if make, and DE becomes one-to-one relationship with the ratio of BC with AD so.On the one hand, if change the value of AD, then DE will change with the ratio of BC, that is to say, the variation of DE and BC ratio can realize by changing the AD value, change the AD value and can obtain required a series of ratio.On the other hand, if the value of AD is remained unchanged,, all there is a DE value that converts in proportion corresponding with it no matter then how BC changes; Otherwise,, also all have a BC value that converts in proportion corresponding with it no matter how DE changes.Therefore, as long as two above-mentioned similar triangles are substituted with a kind of concrete mechanism, just can carry out ratio and regulate and ratiometric conversion.The utility model is achieved in that in the both sides of chi frame and connects two rulers, is provided with ratiometric conversion and ratio governor motion between two rulers.The size that ratio is regulated by changing the AD value realizes, show on scale indicators, ratiometric conversion is finished by the similar triangles change-over mechanism, and conversion is the result reflect by ruler, the utility model is simple in structure, can be installed on the draught machine or with T-square to be used.The example structure that will describe in detail below adopting, easy to manufacture.

Below with reference to accompanying drawing the utility model is described in further detail:

Fig. 2 is a structural representation of the present utility model.

With reference to Fig. 2, a chi frame (6) that is made of plastics is connected with ruler (17) and ruler (4) in its both sides, and its end is connected with proportional scale (19).Ruler (17), ruler (4) are made by transparent plastic, and its inside can be made into non-enclosed shape cavity, are beneficial to pointer (14), (3) move in the inside of chi respectively.The scale of ruler (17) and ruler (4) all is 1 millimeter of every lattice, promptly scribe in the ratio of 1:1, its scale starting point is all on the extended line of frame (1) (being actually the part of chi frame (6)), Arabic numerals on 10 graduated scale, numeral is divided two row, first row is at centimeters mark 1, and at 2 centimeters mark 2, the rest may be inferred.The 2nd line number word is the multiple of the first line number word, and promptly at 1 centimeters mark 2, at 2 centimeters mark 4, the rest may be inferred.The scale of proportional scale (19) is to become the principle of one-to-one relationship to scribe by the ratio of slide block (15) to the distance of frame (1) and slide block (20) to the distance of frame (1) and hinge axis (2) to the distance of movable rail (5), the graduated scale of proportional scale (19) be not hinge axis (2) to movable rail (5) apart from size, but directly mark this ratio apart from the size correspondence, mark standard compliant ratio emphatically.Proportional scale (19) is one six a prismatic pipe, on each faceted pebble, all be carved with ratio, if with its expansion, as shown in Figure 3, first three columns and ruler (4), (17) first line number words are corresponding, back three row are corresponding with ruler (4), (17) second line number words, and for the ease of distinguishing, the ruler first line number word is a black, the second line number word is red, equally, the first three columns word is a black among Fig. 3, and back three row words are red.Unit such as target centimetre, decimeter, meter is expression and the unit of ratio number that corresponding ruler is marked among Fig. 3.Rotation proportional scale (19) makes needed ratio up during use.1:1,1:10, these three ratios of 1:100 directly mark on ruler (4), (17).Trapped orbit (10) and slide bar (16) all are fixed on to mould on the chi frame (6) or with chi frame (6) casts integral body.Movable rail (5) one ends are fixed on the nut (23), and the other end connects a roller (7), and roller (7) can roll on the raceway of chi frame (6).Ruler (17) should be parallel to each other with ruler (4) and be parallel with trapped orbit (10), and movable rail (5) should be parallel with trapped orbit (10).Nut (23) forms a screw pair with screw rod (21).Screw rod (21) is bearing on the chi frame (6) with bearing, for the ease of operation, connects a knob (18) at screw rod (21) one ends, and turning knob (18) just can drive movable rail (5) by nut (23) translation takes place.The pointer (22) that is fixed on the nut (23) upward moves at proportional scale (19), indicates the residing position of movable rail (5) and promptly indicates ratio.Oblique track (11) has flexible, makes with the string of a musical instrument, or does not have specifically described telescopic expansion link to make here with a kind of.Its end is connected to form a revolute pair with the hinge axis (2) that is positioned on the frame (1), and the spring (8) that the other end and is fixed on the chi frame (6) is connected, thereby makes oblique track (11) be in tensioning state all the time.Pulley (12) is installed on the operation slide block (13), and fixed pulley (9) is installed on the chi frame (6), and they play the oblique track of guiding (11) trend.At the slide block (15) of oblique track (11) with the intersection point place installation one band pointer (14) of trapped orbit (10), it can slide along these two tracks simultaneously; At the slide block (20) of oblique track (11) with the intersection point place installation one band pointer (3) of movable rail (5), it can slide along these two tracks simultaneously.Slide block (15) is indicated on ruler (17) by pointer (14) to the distance of frame (1), and slide block (20) to the distance of frame (1) is indicated on ruler (4) by pointer (3).If a given ratio of dwindling, ruler (17) is represented actual size, ruler (4) presentation graphic size so; If the ratio of a given amplification, then ruler (4) is represented actual size, ruler (17) presentation graphic size.At first rotating knob (18) during use makes pointer (22) refer to scale graduation place at needs, move the operation slide block (13) that to locate then everywhere, if the ratio of amplifying makes pointer (3) aim at the actual size scale, then pointer (14) indication is exactly dimension of picture; If the ratio of dwindling makes pointer (14) aim at the actual size scale, then pointer (3) indication is exactly dimension of picture.

Claims (2)

1, a kind of proportioning device includes chi frame [6], ruler [4] that is positioned at chi frame [6] both sides and is parallel to each other and ruler [17], it is characterized in that being provided with between two rulers trapped orbit in parallel [10], and movable rail [5] that can relative its translation parallel with trapped orbit [10], the oblique track [11] that intersects with trapped orbit [10] and movable rail [5], be positioned at trapped orbit [10] and oblique track [11] infall and energy while slide block [15] along two orbital motions, be positioned at movable rail [5] and oblique track [11] infall and energy simultaneously along the slide block [20] of two orbital motions, movable rail [5] and chi frame [6] are provided with scale indicators.

2,, it is characterized in that oblique track (11) makes with the string of a musical instrument by the described proportioning device of claim 1.