CN204788116U - Micrometer protractor - Google Patents

Abstract

The utility model discloses a micrometer protractor belongs to measuring tool technical field. The utility model discloses a micrometer protractor, its transparent plastic shell surface one end is provided with 0 to 180 calibrated scale, inside this transparent plastic shell, sets gradually digitated lantern gear, an intermediate gear, accurate adjustment gear, the 2nd intermediate gear and coarse adjusting gear from the one end that sets up the calibrated scale, two adjacent gear meshing transmission, the pointer gear is concentric with the calibrated scale, in transparent plastic shell outside, the pivot fixed connection of accurate adjustment knob and accurate adjustment gear, transparent plastic shell surface on, outer along being carved with the circumference bisectrix along the accurate adjustment knob, the pivot fixed connection of coarse adjusting knob and coarse adjusting gear. The utility model discloses a not high disadvantage of ordinary protractor measurement accuracy has been solved in the change of the other scale density of the cooperation regulation of accurate adjustment gear and pointer gear and accurate adjustment knob, and in addition, this protractor has with low costsly, convenient and practical's characteristics.

Description

A kind of micrometer protractor

Technical field

The utility model relates to survey instrument technical field, more particularly, relates to a kind of micrometer protractor.

Background technology

Protractor is study and the indispensable instrument taken measurement of an angle in engineering survey.In existing technology, the instrument taken measurement of an angle has multiple, as: set square, protractor (graphometer), angle square duplex measurement instrument etc., although above-mentioned angulometer utensil has the simple feature of structure, but there is the disadvantage that measuring accuracy is not high, therefore, needing to measure in the occasion of High-precision angle, common angulation instrument is just inapplicable.

Through retrieval, Chinese Patent Application No.: 201020195156.7, the applying date: on May 19th, 2010, invention and created name is: a kind of novel angle gauge, this application case discloses a kind of novel angle gauge, comprise primaries hornwork, secondary protractor, central shaft, buckle, annulus, 360 degree of angular bisectors, 89 degree be divided into the little angular bisector of 60 parts, primaries hornwork center is provided with central shaft, secondary protractor by being located at the circular hole on the annulus of secondary protractor O point, the central shaft on primaries hornwork is connected with primaries hornwork with buckle; Primaries hornwork is a transparent circular plastic plate, is carved with the angular bisector of 360 degree above; Secondary protractor is a transparent circular arc plastic plate, is carved with the little angular bisector 89 degree being divided into 60 parts above, thus forms a kind of novel angle gauge.This application case can improve measuring accuracy to a certain extent, and its weak point is, needs in some cases data to be carried out conversion process after reading, just can obtain result, waste time and energy, make troubles to user.

Utility model content

1. the utility model technical matters that will solve

The purpose of this utility model is to overcome the deficiency that in prior art, protractor measuring accuracy is not high, and provide a kind of micrometer protractor, the technical scheme that the utility model provides improves measuring accuracy, convenient to use.

2. technical scheme

For achieving the above object, the technical scheme that the utility model provides is:

A kind of micrometer protractor of the present utility model, comprise transparent plastic shell, pointer gear, the first neutral gear, accurate adjustment gear, the second neutral gear, accurate adjustment knob, coarse adjustment gear and coarse adjustment knob, wherein, described transparent plastic shell outside surface one end is provided with the index dial of 0 to 180 °, inner at this transparent plastic shell, pointer gear, the first neutral gear, accurate adjustment gear, the second neutral gear and coarse adjustment gear is disposed with, adjacent two meshed transmission gear from one end that index dial is set; Described pointer gear is carved with a cursor line, this pointer gear is concentric with index dial; Described accurate adjustment knob and coarse adjustment knob are arranged at the outside of transparent plastic shell, accurate adjustment knob is fixedly connected with the rotating shaft of accurate adjustment gear, the upper surface of this accurate adjustment knob is carved with a cursor line, on described transparent plastic shell outside surface, is carved with circumference equal dividing line along accurate adjustment knob outer; Described coarse adjustment knob is then fixedly connected with the rotating shaft of coarse adjustment gear, and the radius of coarse adjustment gear is greater than the radius of accurate adjustment gear.

Further, the radius of accurate adjustment gear is the 1/n of pointer gear radius, and described n is 36,360 or 3600.

Further, on transparent plastic shell outside surface, be carved with k bar circumference equal dividing line along accurate adjustment knob outer, described k is 100 or 1000.

Further, the center of circle of pointer gear, the first neutral gear, accurate adjustment gear, the second neutral gear, coarse adjustment gear point-blank.

Further, the material of pointer gear is transparent plastic.

3. beneficial effect

The technical scheme adopting the utility model to provide, compared with prior art, has following beneficial effect:

(1) a kind of micrometer protractor of the present utility model, described transparent plastic shell outside surface one end is provided with the index dial of 0 to 180 °, inner at this transparent plastic shell, pointer gear, the first neutral gear, accurate adjustment gear, the second neutral gear, coarse adjustment gear is disposed with, adjacent two meshed transmission gear from one end that index dial is set; The radius of accurate adjustment gear is the 1/n of pointer gear radius, described n is 36,360 or 3600, and k bar circumference equal dividing line is carved with on the transparent plastic shell surface of accurate adjustment knob outer, described k is 100 or 1000, by rotating accurate adjustment gear and coarse adjustment gear, make 0 scale mark on index dial, the scale mark on pointer gear overlaps with the both sides of measured angular respectively, can be accurate to thus the reading of degree, improves the precision of surveying instrument;

(2) a kind of micrometer protractor of the present utility model, the radius of coarse adjustment gear is greater than the radius of accurate adjustment gear, and this structural design can make coarse adjustment gear play the effect of coarse adjustment in use, easy to use; The center of circle of pointer gear, the first neutral gear, accurate adjustment gear, the second neutral gear, coarse adjustment gear, makes this protractor appearance looks elegant, succinct point-blank;

(3) a kind of micrometer protractor of the present utility model, pointer gear is meshed with accurate adjustment gear by the first neutral gear, accurate adjustment gear is meshed with coarse adjustment gear by the second neutral gear, when accurate adjustment gear or coarse adjustment pinion rotation, this structural design can make pointer gear and accurate adjustment gear, coarse adjustment gear sense of rotation identical, meet the use habit of user, easy to use;

(4) a kind of micrometer protractor of the present utility model, operation, convenient reading, cost is low, reasonable in design, and principle is simple, is convenient to promote the use of.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of micrometer protractor of the present utility model;

Fig. 2 is the side view of a kind of micrometer protractor of the present utility model.

Label declaration in schematic diagram:

1, transparent plastic shell; 2, pointer gear; 3, the first neutral gear; 4, accurate adjustment gear; 5, the second neutral gear; 6, accurate adjustment knob; 7, coarse adjustment gear; 8, coarse adjustment knob.

Embodiment

For understanding content of the present utility model further, in conjunction with the accompanying drawings and embodiments the utility model is described in detail.

Embodiment 1

Composition graphs 1 and Fig. 2, a kind of micrometer protractor of the present embodiment, comprise transparent plastic shell 1, pointer gear 2, first neutral gear 3, accurate adjustment gear 4, second neutral gear 5, accurate adjustment knob 6, coarse adjustment gear 7 and coarse adjustment knob 8, wherein, described transparent plastic shell 1 outside surface one end is provided with the index dial of 0 to 180 °, inner at this transparent plastic shell 1, pointer gear 2 is disposed with from one end that index dial is set, first neutral gear 3, accurate adjustment gear 4, second neutral gear 5 and coarse adjustment gear 7, adjacent two meshed transmission gear, and pointer gear 2, first neutral gear 3, accurate adjustment gear 4, second neutral gear 5, the center of circle of coarse adjustment gear 7 point-blank, make this protractor appearance looks elegant, succinctly, in use, rotate coarse adjustment gear 7 and accurate adjustment gear 4, pointer gear 2 and their rotating Vortexes, more meet the use habit of people, the material of described pointer gear 2 is transparent plastic, and is carved with a cursor line, and more practical, convenient, this pointer gear 2 is concentric with index dial, and in the present embodiment, the radius of accurate adjustment gear 4 is 1/36 of pointer gear 2 radius, described accurate adjustment knob 6 and coarse adjustment knob 8 are arranged at the outside of transparent plastic shell 1, accurate adjustment knob 6 is fixedly connected with the rotating shaft of accurate adjustment gear 4, the upper surface of this accurate adjustment knob 6 is carved with a cursor line, on described transparent plastic shell 1 outside surface, be carved with circumference equal dividing line along accurate adjustment knob 6 outer, in the present embodiment, the number of circumference equal dividing line is 100, described coarse adjustment knob 8 is fixedly connected with the rotating shaft of coarse adjustment gear 7, and the radius of coarse adjustment gear 7 is greater than the radius of accurate adjustment gear 4, in use plays the effect of coarse adjustment.In the present embodiment, accurate adjustment gear 4 rotates one week, and pointer gear 2 rotates 10 °, 100 circumference equal dividing lines are carved with on transparent plastic shell 1 surface of accurate adjustment knob 6 outer, adjacent two circumference equal dividing lines be spaced apart 0.1 °, therefore, when taking measurement of an angle, can be as accurate as 0.1 °.

Embodiment 2

Composition graphs 1 and Fig. 2, a kind of micrometer protractor of the present embodiment, basic with embodiment 1, its difference is: in the present embodiment, the radius of accurate adjustment gear 4 is 1/360 of pointer gear 2 radius, on transparent plastic shell 1 outside surface, the number being carved with circumference equal dividing line circumference equal dividing line along accurate adjustment knob 6 outer is 100, in the present embodiment, accurate adjustment gear 4 rotates one week, pointer gear 2 rotates 1 °, the circumference equal dividing line that transparent plastic shell 1 surface of accurate adjustment knob 6 outer is carved with, the time interval 0.01 ° of adjacent two circumference equal dividing lines, 0.01 ° is just can be as accurate as during measured angular.

Embodiment 3

Composition graphs 1 and Fig. 2, a kind of micrometer protractor of the present embodiment, basic with embodiment 1, its difference is: in the present embodiment, the radius of accurate adjustment gear 4 is 1/36 of pointer gear 2 radius, on transparent plastic shell 1 outside surface, the number being carved with circumference equal dividing line circumference equal dividing line along accurate adjustment knob 6 outer is 1000, in the present embodiment, accurate adjustment gear 4 rotates one week, pointer gear 2 rotates 10 °, the circumference equal dividing line that transparent plastic shell 1 surface of accurate adjustment knob 6 outer is carved with, the time interval 0.01 ° of adjacent two circumference equal dividing lines, 0.01 ° is just can be as accurate as during measured angular.

Embodiment 1 ~ 3 in use, first, allows the drift angle of measured angular and pointer gear 2 center superposition, overlapping with 0 ° of line of transparent plastic shell 1 figure dish of measured angular; Then, rotate coarse adjustment knob 8, drive coarse adjustment gear 7 to rotate, then through the transmission of the second neutral gear 5, accurate adjustment gear 4, first neutral gear 3, thus pointer gear 2 is rotated; When the cursor line that pointer gear 2 is carved rotates near another limit of measured angular, rotate accurate adjustment knob 6, accurate adjustment gear 4 is rotated, drives pointer gear 2 to rotate by the first neutral gear 3 transmission, the cursor line that pointer gear 2 is carved is overlapped with measured angular this edge; On the index dial of the cursor line indication finally reading pointer gear 2 carved, precision is the reading of 1 °, obtains final result.Because the ratio of accurate adjustment gear 4 radius and pointer gear 2 radius is 1/n, so when accurate adjustment gear 4 rotates one week, pointer gear 2 rotates 360/n °, again due to there is k bar circumference equal dividing line at the cursor line indication edge on accurate adjustment knob 6, and being now spaced apart of adjacent two circumference equal dividing lines degree, so can be accurately the reading of degree.

Schematically above be described the utility model and embodiment thereof, this description does not have restricted, and also just one of the embodiment of the present utility model shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the utility model and creating aim, design the frame mode similar to this technical scheme and embodiment without creationary, protection domain of the present utility model all should be belonged to.

Claims (5)

1. a micrometer protractor, it is characterized in that: comprise transparent plastic shell (1), pointer gear (2), the first neutral gear (3), accurate adjustment gear (4), the second neutral gear (5), accurate adjustment knob (6), coarse adjustment gear (7) and coarse adjustment knob (8), wherein:

Described transparent plastic shell (1) outside surface one end is provided with the index dial of 0 to 180 °, inner at this transparent plastic shell (1), pointer gear (2), the first neutral gear (3), accurate adjustment gear (4), the second neutral gear (5) and coarse adjustment gear (7) is disposed with, adjacent two meshed transmission gear from one end that index dial is set; Described pointer gear (2) is carved with a cursor line, and this pointer gear (2) is concentric with index dial; Described accurate adjustment knob (6) and coarse adjustment knob (8) are arranged at the outside of transparent plastic shell (1), accurate adjustment knob (6) is fixedly connected with the rotating shaft of accurate adjustment gear (4), the upper surface of this accurate adjustment knob (6) is carved with a cursor line, on described transparent plastic shell (1) outside surface, be carved with circumference equal dividing line along accurate adjustment knob (6) outer; Described coarse adjustment knob (8) is then fixedly connected with the rotating shaft of coarse adjustment gear (7), and the radius of coarse adjustment gear (7) is greater than the radius of accurate adjustment gear (4).

2. a kind of micrometer protractor according to claim 1, is characterized in that: the radius of accurate adjustment gear (4) is the 1/n of pointer gear (2) radius, and described n is 36,360 or 3600.

3. a kind of micrometer protractor according to claim 1 and 2, is characterized in that: on transparent plastic shell (1) outside surface, be carved with k bar circumference equal dividing line along accurate adjustment knob (6) outer, described k is 100 or 1000.

4. a kind of micrometer protractor according to claim 3, is characterized in that: the center of circle of pointer gear (2), the first neutral gear (3), accurate adjustment gear (4), the second neutral gear (5), coarse adjustment gear (7) point-blank.

5. a kind of micrometer protractor according to claim 4, is characterized in that: the material of pointer gear (2) is transparent plastic.