CN2484543Y - Universal angle gauge without parallax - Google Patents

Abstract

The utility model relates to a universal angle gauge without parallax. A side edge of the angle gauge connects with a side edge of a staff through the first block and adjustable positioning bolt. A side edge of a main scale is fixed on, and connected with a side edge of an arc main scale. A pointed end of the main scale is located at the center of the arc main scale, which connects with the angle gauge by adjustable positioning bolt through the second block and fan-form board. A side edge of the fan-form board is equal with a side edge of the angle gauge. An arc vernier piece connects with the fan-form board through a fixing bolt, and a fan-form edge of the arc vernier piece is equal with the fan-form edge of the fan-form board. The arc vernier piece and the dial scale of the arc main scale are in a same plane. The utility model has the advantages of no reading parallax, etc.

Description

The no parallax universal protractor

The utility model belongs to a kind of measurement of angle instrument, relates in particular to a kind of no parallax universal protractor.

The universal protractor that uses in the measuring technique adopts common vernier metering system as shown in Figure 1 at present, and promptly circular arc vernier slice 11 covers reading on circular arc main scale 12.Fig. 2 provides the A-A ' partial cutaway schematic of this universal protractor, from figure, find out easily, the scale limit of circular arc vernier slice 11 places on the scale limit of circular arc main scale 12, circular arc vernier slice 11 is fixed on fill block 14 sides, the consistency of thickness of fill block 14 and circular arc main scale 12, set screw 16 by fanning strip 13 back is combined as a whole with fanning strip 13, from figure, obviously find out, scale mark on scale mark on the circular arc vernier slice 11 and the circular arc main scale 12 is not on same plane, and the appearance of step difference 15 is because the discrepancy in elevation between circular arc vernier slice 11 and the circular arc main scale 12 produces.When people's reading, can observe residing different angles because of it like this, reading value is different, and the difference of this difference reading value is exactly people's so-called " parallaxes ".Just because of the existence of this parallax, so existing universal protractor often brings the low shortcoming of reading accuracy.

The purpose of this utility model is, at the above-mentioned universal protractor structure reason that jump occurs of appearing on the stage, adopt industrial wedge-like engagement structure commonly used, the circular arc vernier slice is cooperated preferably with circular arc main scale surface of contact, thereby make the scale on it all be positioned at same plane.

Another purpose of the present utility model is, textural, makes the consistency of thickness of circular arc vernier slice and circular arc main scale, realizes good location, reduces part, is convenient to assembling.

The utility model is achieved in that a kind of no parallax universal protractor, comprise main scale, the base chi, angle square and circular arc vernier slice, the circular arc main scale, fixture block, fanning strip is connected adjustable bolt with some, one side of described angle square is connected with the side of basic chi with adjustable bolt by first fixture block, the side of described main scale is fixedly connected on a side of circular arc main scale, one tip of described main scale is positioned on the center of circle of circular arc main scale, described circular arc main scale is linked to each other with angle square with fanning strip by second fixture block by adjustable bolt, one side of described fanning strip is mutually concordant with a side of angle square, described circular arc vernier slice links to each other with described fanning strip by set bolt, the scallop of described circular arc vernier slice is mutually concordant with the scallop of described fanning strip, it is characterized in that the dial face of described circular arc vernier slice and circular arc main scale is in the same plane.

Below, with reference to accompanying drawing, for those skilled in the art that, to the detailed description of the present utility model, above-mentioned and other purposes of the present utility model, feature and advantage will be apparent.

Fig. 1 is the structural representation of the universal protractor that uses in the prior art;

Fig. 2 is the A-A ' partial cutaway schematic among Fig. 1;

Fig. 3 is the structural representation of no parallax universal protractor of the present utility model;

Fig. 4 is the N-N ' diagrammatic cross-section among Fig. 3;

Fig. 5 is the partial cutaway schematic of N-N ' among Fig. 3.

As can be seen from Figure 3, no parallax universal protractor of the present utility model mainly is made up of angle square 31, circular arc vernier slice 32, circular arc main scale 33, main scale 35 and basic chi 38, circular arc vernier slice 32 and circular arc main scale 33 are installed on the fanning strip 34, lower end by fixture block 151 insertion angle squares 31, be used for the one that mobile circular arc main scale 33, main scale 35 and fanning strip 34 constitute, by fixture block 152 same insertions in the basic chi 38, realize moving the relative motion between basic chi 38 and the angle square 31.Main scale 35 is fixed in a side of circular arc main scale 33, the tip of main scale 35 is positioned on the center of circle of circular arc main scale 33, when rotating the knob 43 of fanning strip 34 back, by the arc rack 47 behind the circular arc main scale 33 that is installed in band angle index plate, the circular arc scaleplate that drives on the circular arc main scale 33 rotates, between main scale 35 and basic chi 38, form an angle, thereby reach the purpose of measuring or obtaining required angle.

Fig. 4 provides the N-N ' cut-open view of this no parallax universal protractor, the consistency of thickness of circular arc vernier slice 32 and circular arc main scale 33.Make the scale on circular arc vernier slice 32 and the circular arc main scale 33 in the same plane like this.In the partial enlarged drawing of Fig. 5, can know the situation that combines of understanding circular arc vernier slice 32, circular arc main scale 33 and fanning strip 34.In position one hollow part is set at circular arc vernier slice 32, circular arc main scale 33 faying faces and divides 41 near fanning strip 34, hollow part divides 41 to be in order to prevent the location, with the circular arc vernier slice 32 and the circular arc main scale 33 faying face positions of fanning strip 34 opposite sides, what adopt is the inclined-plane fit system, just in the same plane at circular arc vernier slice 32 like this with the scaleplate plate face of circular arc main scale 33, eliminated the influence of parallax.In addition, the circular arc vernier slice 32 and the excessively positioning phenomenon of circular arc main scale 33 in assembling process of this structure have also been eliminated.And saved the part fill block 14 of existing no parallax universal protractor.

The no parallax universal protractor of the utility model structure has the reading no parallax, good looking appearance, advantage such as part is few, and is easy to assembly.

More than all embodiment only for the explanation the utility model usefulness, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or variation, so all technical schemes that are equal to also should belong to category of the present utility model and should be limited by each claim.

Claims (3)

1, a kind of no parallax universal protractor, comprise main scale, the base chi, angle square and circular arc vernier slice, the circular arc main scale, fixture block, fanning strip is connected adjustable bolt with some, one side of described angle square is connected with the side of basic chi with adjustable bolt by first fixture block, the side of described main scale is fixedly connected on a side of circular arc main scale, one tip of described main scale is positioned on the center of circle of circular arc main scale, described circular arc main scale is linked to each other with angle square with fanning strip by second fixture block by adjustable bolt, one side of described fanning strip is mutually concordant with a side of angle square, described circular arc vernier slice links to each other with described fanning strip by set bolt, the scallop of described circular arc vernier slice is mutually concordant with the scallop of described fanning strip, it is characterized in that the dial face of described circular arc vernier slice and circular arc main scale is in the same plane.

2, no parallax universal protractor according to claim 1 is characterized in that, the end face that described circular arc vernier slice combines with the circular arc main scale is adopting the inclined-plane fit structure away from the fanning strip place.

3, no parallax universal protractor according to claim 2 is characterized in that, the end face that described circular arc vernier slice combines with the circular arc main scale is being provided with a hollow part position near the fanning strip place,

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