CN203651278U

CN203651278U - Multi-purpose ruler for mathematical drawing and measurement

Info

Publication number: CN203651278U
Application number: CN201320850458.7U
Authority: CN
Inventors: 冯之涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-23
Filing date: 2013-12-23
Publication date: 2014-06-18
Anticipated expiration: 2023-12-23

Abstract

The utility model discloses a multi-purpose ruler for mathematical drawing and measurement. The multi-purpose ruler comprises a straight edge and a protractor. Angle indexes are arranged on the protractor, the straight edge comprises a rotating ruler and a locating ruler, the locating ruler comprises two long edges and two short edges for connecting the two long edges, and one end of the locating ruler is hinged to a fixing tip. A kidney slot parallel to the long edges is formed in the middle of the locating ruler, one end of the rotating ruler is connected with a cylinder serving as a slider, the cylinder is clamped in the kidney slot, and chalk is mounted at the other end of the rotating ruler by the aid of a chalk sleeve. The two long edges of the locating ruler are a top edge and a bottom edge respectively, length scales are marked on the bottom edge, and a boss is arranged at the top edge. The protractor is provided with a groove matched with the boss, and the boss is embedded in the groove to allow the protractor to move on the locating ruler. The multi-purpose ruler can be used independently as well as used in combination, and can be used for drawing lines and arcs and measuring angles as well, thereby being multifunctional.

Description

Mathematics is drawn and is measured multipurpose ruler

Technical field

The utility model belongs to teaching apparatus, refers in particular to a kind of Multifunctional mathematics teaching device.

Background technology

In mathematical education, particularly in the mathematical education process of middle and primary schools, in order to make the class teaching content of understanding that student is more prone to, teacher need to carry out manual drawing on blackboard, and so just causing ruler, compasses and protractor to become is one of instrument indispensable in mathematical education.But, traditional mathematics drawing instrument is for example: ruler, compasses, protractor normally independently arrange, and teacher, in the time of graphing, need to change drawing apparatus according to the needs of drawing conventionally, mapping will cumbersome complexity like this, brings a lot of inconvenience to teacher's picture.

For above-mentioned technical problem, patent ZL201020509229.5 Multifunctional rule, ZL201220549029.1 mathematical education are as angle instrument, ZL201020658566.0 Multi-purpose ruler for teaching, all providing a kind of combines ruler with protractor, realize the multiplex function of a chi, solve to a certain extent the problem that need change utensil when mathematics teacher does angle, but, serve as a teacher and need to draw circular arc or bowlder, still need to change drawing appliance, and provide a kind of multifunctional teaching compasses at patent ZL201020509229.5, comprise fixed bar, swingle, the top of fixed bar and swingle is connected and fixed by rotating shaft, the top of fixed bar is as the straight flange of graphometer, above-mentioned rotating shaft is arranged on the center of graphometer straight flange, install and fix a sucker at the end pin place of fixed bar, described swingle is around the arc-shaped side rotation of graphometer, end pin place at swingle is mounted with chalk sleeve, although this device can be realized ruler, the function that protractor combines with compasses, but, because graphometer and ruler are made of one, when the straight line that only needs picture to grow or while only needing to take measurement of an angle, to draw a picture on the blackboard of vertical level because teacher uses, being fixedly connected with due to both like this, can make teacher in the time of graphing, expend a large amount of muscle power, use inconvenient.

Utility model content

For solving the problems of the technologies described above, the purpose of this utility model be to provide a kind of easy to use, both can be used in combination, multipurpose ruler is measured in can mathematics drawing of also can independently using.

For achieving the above object, the utility model comprises ruler, protractor, described protractor is provided with angle index, it is characterized in that: described ruler comprises rotary ruler and positioning rule, this positioning rule comprises two long limits and two minor faces that are connected two long limits, the hinged fixing point in one end of this positioning rule; The centre of described positioning rule is provided with the kidney slot paralleling with long limit, described rotary ruler one end slide block that is hinged, and slide block is stuck in kidney slot, the detachable chalk that is equipped with of the other end of described rotary ruler; Two long limits of described positioning rule are respectively top margin and base, and described base is marked with length scale, and described top margin is provided with a boss; This protractor is provided with the groove matching with described boss, and described boss is embedded in described groove, and described protractor can be moved in described positioning rule.

On the basis of such scheme, preferably, described protractor comprises the module extender board that is the Angle protractor of semi-annular shape and connects described Angle protractor two ends, and described groove is arranged on this module extender board.

On the basis of such scheme, preferably, described positioning rule is positioned at the back side, fixing sharp one end and is provided with half arc surface, surrounds for holding fixing sharp accommodation space with the positioning rule back side.

On the basis of such scheme, preferably, described slide block is cylinder.

On the basis of such scheme, preferably, described chalk is arranged on the pen cap, and the pen cap is arranged on rotary ruler end.

The utility model compared with prior art, its beneficial effect is: the utility model has overcome mathematics drawing instrument in traditional concept to be separated the artificial combination that needs that independent design causes and use the difficulty of bringing, simultaneously, having solved existing combined type mathematics drawing instrument can not dismantle caused teacher and use for a long time, the defect consuming one's strength, by the groove of the straightway setting of protractor of the present utility model and the boss arranging on the top margin of positioning rule, by protractor and positioning rule is detachable links together, thereby not only can realize can being used in combination of ruler and protractor and draw quantitative angle, but also can realize ruler and protractor separate independent measurement and use, simultaneously, in the centre of positioning rule, one kidney slot is set, what can relative positioning chi move by hinge rotary ruler one end is arranged in this kidney slot, the detachable chalk that is equipped with of the other end of this rotary ruler, and be provided with a fixing point in positioning rule one end, thereby not only can complete the drafting of circle or radian, and, in the time that rotary ruler is turned to described positioning rule at same linear position around hinge, also can increase the drafting of straight line or measure length, avoided when user is in the time drawing longer straight line, that need move ruler causes the not straight problem of setting-out.

Brief description of the drawings

Fig. 1 is front view of the present utility model;

Fig. 2 is side view of the present utility model;

In figure: 10. ruler, 11. rotary rulers, 12. positioning rules, 13. kidney slots, 14. fixing points, 15. cylinders, 16. chalks, 17. boss, 18. accommodation spaces, 19. semicircle cambered surfaces, 20. protractors, 21. grooves.

Detailed description of the invention

By describe in detail the utility model technology contents, structural feature, reached object and effect, below hereby exemplify embodiment and coordinate accompanying drawing to be explained in detail.

Refer to Fig. 1, and in conjunction with consulting shown in Fig. 2, the utility model comprises ruler 10, protractor 20, protractor 20 is provided with angle index, ruler 10 comprises rotary ruler 11 and positioning rule 12, positioning rule 12 comprises two long limits and two minor faces that are connected two long limits, one end hinged fixing sharp 14 of positioning rule 12; The centre of positioning rule 12 is provided with the kidney slot 13 paralleling with long limit, and rotary ruler 11 one end connect a cylinder 15 as slide block, and cylinder 15 is stuck in kidney slot 13, and the other end of rotary ruler 11 utilizes the pen cap that chalk 16 is installed; Two long limits of positioning rule 12 are respectively top margin and base, and base is marked with length scale, and top margin is provided with a boss; Protractor 20 is provided with the groove 21 matching with boss, and boss is embedded in 21 grooves, and protractor 20 can be moved in positioning rule 12.

Protractor 20 comprises the module extender board that is the Angle protractor of semi-annular shape and connects described Angle protractor two ends, and groove 21 is arranged on this module extender board.

Positioning rule 12 is positioned at fixing sharp 14 back sides, one end of installation and is provided with half arc surface 19; surround the accommodation space 18 for holding fixing point 14 with positioning rule 12 back sides; fixing sharp 14 of hinged positioning rule 12 can be rotated and be entered accommodation space 18, and protection fixing point 14, also can prevent the injury to people.

In sum, be only the preferred embodiment of the utility model, do not limit protection domain of the present utility model with this, all equivalences of doing according to the utility model the scope of the claims and description change and modify, within being all the scope that the utility model patent contains.

Claims

1. mathematics is drawn and is measured multipurpose ruler, comprise ruler, protractor, described protractor is provided with angle index, it is characterized in that: described ruler comprises rotary ruler and positioning rule, this positioning rule comprises two long limits and two minor faces that are connected two long limits, the hinged fixing point in one end of this positioning rule; The centre of described positioning rule is provided with the kidney slot paralleling with long limit, described rotary ruler one end slide block that is hinged, and slide block is stuck in kidney slot, the detachable chalk that is equipped with of the other end of described rotary ruler; Two long limits of described positioning rule are respectively top margin and base, and described base is marked with length scale, and described top margin is provided with a boss; This protractor is provided with the groove matching with described boss, and described boss is embedded in described groove, and described protractor can be moved in described positioning rule.

2. mathematics according to claim 1 is drawn and is measured multipurpose ruler, it is characterized in that: described protractor comprises the module extender board that is the Angle protractor of semi-annular shape and connects described Angle protractor two ends, and described groove is arranged on this module extender board.

3. mathematics according to claim 1 is drawn and is measured multipurpose ruler, it is characterized in that: described positioning rule is positioned at the back side, fixing sharp one end and is provided with half arc surface, surrounds for holding fixing sharp accommodation space with the positioning rule back side.

4. mathematics according to claim 1 is drawn and is measured multipurpose ruler, it is characterized in that: described slide block is cylinder.

5. mathematics according to claim 1 is drawn and is measured multipurpose ruler, it is characterized in that: described chalk is arranged on the pen cap, and the pen cap is arranged on rotary ruler end.