CN206394329U - Multi-function protractor - Google Patents

Abstract

The utility model discloses a kind of multi-function protractor, including semiorbicular scale ring body and level board, the inner side edge of level board is concordant with the line of 0 ° of graduation mark and 180 ° of graduation marks in scale ring body, the upper surface of level board is concordant with the upper surface of scale ring body, graduation mark is equipped with the lower surface of scale ring body and level board, the middle part of level board medial surface is provided with the fixation ear of semicircular in shape, the upper surface of fixed ear offers counterbore, the center of circle of scale ring body is on the axis of counterbore, the installation axle of overhanging setting is fixed with counterbore, the outer surface for installing shaft end is provided with external screw thread, indicating arm and wing nut are set with installation axle, scale ring body upper surface is respectively equipped with inner groove and outer groove along its inner rim and outer rim, the lower surface of indicating arm is provided with the Nei Kaer that can be caught in inner groove and be slided along inner groove and can be caught in outer groove and the wild card ear slided along outer groove, the lower surface of indicating arm overhanging end is fitted with the upper surface of scale ring body.

Description

Multi-function protractor

Technical field

The utility model is related to a kind of multi-function protractor.

Background technology

Teacher is frequently necessary to draw the angle of various angles on blackboard in teaching process, at present can be very convenient with set square Ground draws 30 °, 45 ° and 60 ° of angle, but, it is necessary to set square first in black lining out, reuse when drawing the angle of other angles Protractor determines the position of another a line on blackboard, finally needs constantly to become during giving lessons by 2 points of connections with set square Educational aid is changed, is lost time, and the working strength of increase teacher.And current protractor only has the sheet in semicircle shape Graduation mark is carved with body, the end of semicircle shape body, and the length of graduation mark is shorter, when measuring angle, if two sides at angle are shorter, Also need two diagonal sides to do extended line so as to be directed at graduation mark, and then read accurate angle, in-convenience in use.

The content of the invention

The technical problems to be solved in the utility model is to provide a kind of multi-function protractor easy to use.

In order to solve the above technical problems, the utility model includes protractor body, it is structurally characterized in that the protractor sheet Body includes semiorbicular scale ring body and the level board being connected with scale ring body bottom two ends, the inner side edge of the level board and quarter The line for spending 0 ° of graduation mark and 180 ° of graduation marks in ring body is concordant, and the upper surface of the level board and the upper surface of scale ring body are flat Together, the level board and scale ring body surround semicircular instruction space, on the lower surface of the scale ring body and level board Provided with graduation mark, the middle part of the level board medial surface is provided with the fixation ear of semicircular in shape, and it is heavy that the upper surface of fixed ear is offered Hole, the center of circle of the scale ring body is fixed with the installation axle of overhanging setting, the installation on the axis of counterbore in the counterbore The outer surface of shaft end, which is provided with, to be set with indicating arm in external screw thread, the installation axle and indicating arm can be pressed on level board Wing nut, the scale ring body upper surface is respectively equipped with inner groove and outer groove along its inner rim and outer rim, the indicating arm Lower surface be provided with the Nei Kaer that can be caught in inner groove and be slided along inner groove and can be caught in outer groove and along outer groove slide it is outer Card ear, the lower surface of the indicating arm overhanging end is fitted with the upper surface of scale ring body.

The indicating arm includes interior indicating arm and outer indicating arm, and the interior indicating arm and outer indicating arm cover successively from inside to outside On the mounting shaft, the thickness of interior overhanging section of the indicating arm and the thickness of overhanging section of outer indicating arm are equal, the interior indicating arm for dress The thickness sum of hinge segment and outer indicating arm hinge segment be equal to overhanging section of interior indicating arm thickness and interior indicating arm hinge segment it is upper The lower surface of surface and outer indicating arm hinge segment is bonded to each other.

The outer peripheral face of the scale ring body is equipped with card holding trough, and the top of the card holding trough is connected with the bottom of inner groove, The depth of the card holding trough is more than the width of inner groove, and card holding trough can be caught in and can by being removably provided with the wild card ear The clamp ear slided along card holding trough.

The clamp ear is in inverted L shape, and the clamp ear is made up of the short support arm and long support arm being arranged in a mutually vertical manner, described short Support arm is fastened on the indentation, there set on the outside of wild card ear end and is fixedly connected by screw with wild card ear.

After said structure, the utility model sets indicating arm on level board, and scale ring body is corresponding with indicating arm to be set Put annular groove and Ka Er, make indicating arm can around scale ring body smooth rotation, in use, rotate indicating arm to required angle when, by butterfly Shape nut is tightened, you can along indicating arm setting-out, and teacher can easily draw the angle of various angles, and simplify the step at picture angle Suddenly.Simultaneously the utility model by indicating arm rotate can quick measurement angle angle, using being more convenient.

Brief description of the drawings

Below in conjunction with the accompanying drawings and embodiment is described in further detail to the utility model：

Fig. 1 is structural representation of the present utility model；

Fig. 2 is structural representations of the Fig. 1 along line A-A section view；

Fig. 3 is the left view of Fig. 1 China and foreign countries indicating arm；

Fig. 4 be Fig. 2 in B place amplification structural representation.

Embodiment

As shown in Figures 1 to 4, multi-function protractor includes protractor body, and protractor body includes semiorbicular scale Ring body 1 and the level board 2 being connected with the bottom two ends of scale ring body 1, inner side edge and the 0 ° of graduation mark in scale ring body 1 of level board 2 Line with 180 ° of graduation marks is concordant, is easy to overlap with one side of angulation to be measured during measurement angle, is easy to reading angular.Level board 2 upper surface is concordant with the upper surface of scale ring body 1, and level board 2 surrounds semicircular instruction space, scale with scale ring body 1 Graduation mark is equipped with the lower surface of ring body 1 and level board 2, the middle part of the medial surface of level board 2 is provided with the fixation ear of semicircular in shape 10, the upper surface of fixed ear 10 offers counterbore, and the center of circle of scale ring body 1 is fixed with overhanging on the axis of counterbore, in counterbore The installation axle 5 of setting, the outer surface of the end of installation axle 5, which is provided with external screw thread, installation axle 5, is set with indicating arm and spiral shell mounted in installation On axle and the wing nut 6 that indicating arm can be pressed on level board 2.

To make indicating arm more preferably along being fitted with scale ring body 1 in the utility model, the upper surface of scale ring body 1 along its inner rim and Outer rim is respectively equipped with inner groove and outer groove, and the lower surface of indicating arm, which is provided with, can be caught in inner groove and the interior card slided along inner groove Ear 7 and outer groove and the wild card ear 8 slided along outer groove can be caught in, the lower surface of indicating arm overhanging end is upper with scale ring body 1 Fit on surface.During to prevent that wing nut 6 is more loose, indicating arm departs from the surface of scale ring body 1, in the periphery face ring of scale ring body 1 Provided with card holding trough, the top of card holding trough is connected with the bottom of inner groove, and the depth h of card holding trough is more than the width d of inner groove, wild card The clamp ear 9 that card holding trough can be caught in and can be slided along card holding trough is removably installed on ear 8.Clamp ear 9 in the present embodiment In inverted L shape, clamp ear 9 is made up of the short support arm and long support arm being arranged in a mutually vertical manner, and short support arm is fastened on the outside of the end of wild card ear 8 The indentation, there of setting is simultaneously fixedly connected by screw with wild card ear 8.In use, clamp ear 9 is stuck in card holding trough all the time, prevent from referring to Show that bar departs from when being slided along scale ring body 1 with scale ring body 1.

Indicating arm is two in the present embodiment, and indicating arm includes interior indicating arm 3 and outer indicating arm 4, interior indicating arm 3 and outer finger Show that bar 4 is sleeved in installation axle 5 successively from inside to outside, the lower surface for the overhanging end of indicating arm 3 and outer indicating arm 4 in ensureing is equal Can be fitted with the upper surface of scale ring body 1, in the present embodiment in overhanging section of indicating arm 3 thickness and overhanging section of outer indicating arm 4 Thickness is equal, and the thickness sum of the interior hinge segment of indicating arm 3 and the hinge segment of outer indicating arm 4 is equal to the thickness of interior overhanging section of indicating arm 3 And the upper surface of the interior hinge segment of indicating arm 3 and the lower surface of the hinge segment of outer indicating arm 4 are bonded to each other, will in indicating arm 3 and outer The corresponding surface of the hinge segment of indicating arm 4 machines away appropriate section, makes interior indicating arm 3 and outer indicating arm 4 be easy to hinge to fill, and ensures both The lower surface of overhanging end can fit with the upper surface of scale ring body 1, and the setting for being hinged segment length determines interior indicating arm 3 and outer finger Show the degree that bar 4 closes up, i.e. interior minimum angles between indicating arm 3 and outer indicating arm 4.Refer to set in the utility model simultaneously in Show bar 3 and outer indicating arm 4, interior indicating arm 3 and outer indicating arm 4 are sleeved in installation axle 5, and available wing nut 6 is tightened, and makes this Utility model can simultaneously measure, indicate different angles, and draw before angle, and the angle of indicating arm 3 and outer indicating arm 4, is used in combination in regulation Wing nut 6 is tightened to fix indicating arm, then can draw suitable angle, be not required to multiple described point, repeatedly converts teaching aid, More intuitive impression is brought to student, teaching is more beneficial for.And turn to can be with after departing from scale ring body 1 for two indicating arms Meaning is rotated, and can be used as ruler etc., be made the utility model occupation mode various, using finishing, then indicating arm is gone back to, clamp Ear 9, interior card ear 7 and wild card ear 8 are caught in corresponding groove.

Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to.Previous embodiment The utility model is described in detail, for those skilled in the art, it still can be to foregoing each implementation Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic.In every case it is new in this practicality Within the scope of the inventive concept of type, any modification, equivalent substitution and improvements done etc. are all contained in protection of the present utility model Within the scope of.

Claims (3)

1. a kind of multi-function protractor, including protractor body, it is characterized in that the protractor body includes semiorbicular scale Ring body and the level board being connected with scale ring body bottom two ends, the inner side edge of the level board and 0 ° of graduation mark in scale ring body and The line of 180 ° of graduation marks is concordant, and the upper surface of the level board is concordant with the upper surface of scale ring body, and the level board is with carving Degree ring body surrounds semicircular instruction space, and graduation mark, the water are equipped with the lower surface of the scale ring body and level board The middle part of flat board medial surface is provided with the fixation ear of semicircular in shape, and the upper surface of fixed ear offers counterbore, the scale ring body The center of circle is fixed with the installation axle of overhanging setting on the axis of counterbore in the counterbore, the outer surface of the installation shaft end is set Have and indicating arm and the wing nut that indicating arm can be pressed on level board, the quarter are set with external screw thread, the installation axle Degree ring body upper surface is respectively equipped with inner groove and outer groove along its inner rim and outer rim, and the lower surface of the indicating arm is provided with and can be caught in Inner groove and the Nei Kaer that is slided along inner groove and it can be caught in outside outer groove and the wild card ear slided along outer groove, the indicating arm The lower surface for stretching end is fitted with the upper surface of scale ring body；The outer peripheral face of the scale ring body is equipped with card holding trough, the clamp The top of groove is connected with the bottom of inner groove, and the depth of the card holding trough is more than removable on the width of inner groove, the wild card ear The clamp ear that card holding trough can be caught in and can be slided along card holding trough is installed with unloading formula.

2. multi-function protractor according to claim 1, it is characterized in that the indicating arm includes interior indicating arm and outer instruction Bar, the interior indicating arm and outer indicating arm are set with the mounting shaft successively from inside to outside, the thickness of interior overhanging section of the indicating arm Equal with overhanging section of thickness of outer indicating arm, the thickness sum of the interior indicating arm hinge segment and outer indicating arm hinge segment is equal to interior The thickness and the lower surface of the upper surface of interior indicating arm hinge segment and outer indicating arm hinge segment that overhanging section of indicating arm are bonded to each other.

3. multi-function protractor according to claim 1 or 2, it is characterized in that the clamp ear is in inverted L shape, the clamp ear It is made up of the short support arm and long support arm that are arranged in a mutually vertical manner, the short support arm is fastened on the indentation, there set on the outside of wild card ear end And be fixedly connected by screw with wild card ear.