CN208544016U - A kind of Mathematical picture teaching ruler - Google Patents

Abstract

The utility model discloses a kind of Mathematical picture teaching rulers, including main scale, protractor is installed on rear side of the main scale, the inner cavity of the main scale is equipped with fixing axle, movable sleeve is connected to auxiliary scale in the fixing axle, and first sliding groove is offered in the auxiliary scale, the first graduation mark is etched on the right side of the auxiliary scale, the first chalk renderer is slidably fitted in the first sliding groove, the side of the first chalk renderer offers ledge for chalk on blackboard.The Mathematical picture teaching ruler; by setting positioning mechanism and fixed mechanism, makes the teaching ruler when drawing camber line, can accurately draw out the camber line of regulation radian; and during drawing camber line; the phenomenon that whole process is stable, is not in shaking, secondly; after completing to draw; the mechanisms such as its auxiliary scale can store completely into the inner cavity of main scale, not only carry out good protecting effect to mechanisms such as auxiliary scales, while also reducing space occupancy.

Description

A kind of Mathematical picture teaching ruler

Technical field

The utility model relates to teaching aid technical field, specially a kind of Mathematical picture teaching ruler.

Background technique

In the teaching process of mathematics geometric knowledge, teaching ruler is that one kind must use educational aid, existing teaching ruler, function It is more and more complete, a kind of mathematics picture teaching ruler as disclosed in China Patent No. CN 201520808754.X, by main scale with And the dual drafting function of camber line and straight line may be implemented in auxiliary scale.

But observe by analysis, finding it, there are following defects: one, during drawing camber line, lack Effective positioning mechanism, it is difficult to the camber line of accurate radian is drawn out, and its chalk renderer lacks effective fixed mechanism, The phenomenon that shaking is easy to appear in drawing process；Two, it after its auxiliary scale is completed to store, is still exposed to except main scale, thus not It is only easy to damage auxiliary scale, and also takes up space in storage.

Utility model content

The purpose of this utility model is to provide a kind of Mathematical picture teaching rulers, to solve to mention in above-mentioned background technique Out the problem of.

To achieve the above object, the utility model provides the following technical solutions: a kind of Mathematical picture teaching ruler, including Main scale is equipped with protractor on rear side of the main scale, and the inner cavity of the main scale is equipped with fixing axle, movable sleeve in the fixing axle It is connected to auxiliary scale, first sliding groove is offered in the auxiliary scale, the first graduation mark, the first sliding groove are etched on the right side of the auxiliary scale On be slidably fitted with the first chalk renderer, the side of the first chalk renderer offers ledge for chalk on blackboard, first chalk The left and right sides of renderer is welded with fixed block, and screw thread is equipped with the first clamping screw, the fixing axle on the fixed block On also movable sleeve is connected to left locating rod and right locating rod respectively, the equal screw thread peace in the top of the left locating rod and right locating rod Equipped with the second clamping screw, the bottom of the main scale offers second sliding slot, and sliding block, institute are slidably fitted in the second sliding slot It states and is welded with the second chalk renderer on sliding block, and the bottom of the second chalk renderer extends to outside the bottom of main scale, described The bottom etching of two sliding slots has the second graduation mark.

Preferably, sucker is mounted at left and right sides of the main scale；

Preferably, the bottom of the main scale inner cavity is equipped with by block.

Preferably, indicator is installed on the fixed block on the right side of the auxiliary scale.

Preferably, the fixing axle and protractor are located on same axial line.

Compared with prior art, the utility model has the beneficial effects that the Mathematical picture teaching ruler, fixed by being arranged Position mechanism and fixed mechanism, make the teaching ruler when drawing camber line, can accurately draw out the camber line of regulation radian, and The phenomenon that during drawing camber line, whole process is stable, is not in shaking, secondly, after completing to draw, auxiliary scale etc. Mechanism can store completely into the inner cavity of main scale, not only carry out good protecting effect to mechanisms such as auxiliary scales, while also subtracting Space occupancy is lacked；In use, rotating auxiliary scale first, it will be extracted in its cavity from main scale, while that extracts determines there are also left Position bar and right locating rod, such as need to draw the camber line that radian is 30 degree, so that left locating rod is attached to left side, right locating rod patch Radian between right side, left locating rod and right locating rod is 30 degree, and specific angle is obtained by protractor, then by turning Left locating rod and right locating rod are fixed dynamic second clamping screw, then by sliding the first chalk renderer, according to The registration of first graduation mark after determining radius of curvature, rotates the first clamping screw so that it is determined that the radius of camber line, fixes the The position of one chalk renderer, then rotates auxiliary scale, draws camber line, after having drawn camber line, then successively by auxiliary scale, left locating rod with And right locating rod stores into the inner cavity of main scale (as shown in Figure 4), slides it in second sliding slot by sliding slider, drives Second chalk renderer sliding, so as to draw out straight line.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the structure sectional view of the utility model；

Fig. 3 is the partial enlarged view of Fig. 2 of the utility model；

Fig. 4 is the status diagram after the storage of the utility model auxiliary scale；

Fig. 5 is the first chalk of the utility model renderer structural side view；

Fig. 6 is the utility model fixed axle structure side view.

In figure: 1 main scale, 2 protractors, 3 fixing axles, 4 auxiliary scales, 5 first sliding grooves, 6 first graduation marks, 7 first chalks are drawn Device, 71 ledges for chalk on blackboard, 8 fixed blocks, 9 first clamping screws, 10 left locating rods, 11 right locating rods, 12 second clamping screws, 13 second Block, 19 indicators are leaned in sliding slot, 14 sliding blocks, 15 second chalk renderers, 16 second graduation marks, 17 suckers, 18.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-6 is please referred to, the utility model provides a kind of technical solution: a kind of Mathematical picture teaching ruler, by setting Positioning mechanism and fixed mechanism are set, makes the teaching ruler when drawing camber line, can accurately draw out the camber line of regulation radian, The phenomenon that and during drawing camber line, whole process is stable, is not in shaking, secondly, after completing to draw, it is secondary The mechanisms such as ruler 4 can store completely into the inner cavity of main scale 1, not only carry out good protecting effect to mechanisms such as auxiliary scales 4, together When also reduce space occupancy；Including main scale 1, the rear side of the main scale 1 is equipped with protractor 2, the inner cavity peace of the main scale 1 Equipped with fixing axle 3, movable sleeve is connected to auxiliary scale 4 in the fixing axle 3, and first sliding groove 5, the auxiliary scale 4 are offered in the auxiliary scale 4 Right side be etched with the first graduation mark 6, the first chalk renderer 7, first chalk are slidably fitted in the first sliding groove 5 The side of renderer 7 offers ledge for chalk on blackboard 71, and ledge for chalk on blackboard 71 is provided with chalk and can be drawn, the first chalk renderer 7 The left and right sides be welded with fixed block 8, screw thread is equipped with the first clamping screw 9 on the fixed block 8, in the fixing axle 3 Also movable sleeve is connected to left locating rod 10 and right locating rod 11 respectively, and the top of the left locating rod 10 and right locating rod 11 is equal Screw thread is equipped with the second clamping screw 12, in use, rotating auxiliary scale 4 first, it is extracted out of main scale 1 cavity, is pulled out simultaneously Also left locating rod 10 and right locating rod 11 out, such as need to draw the camber line that radian is 30 degree, make left locating rod 10 It is attached to left side, right locating rod 11 is attached to right side, and the radian between left locating rod 10 and right locating rod 11 is 30 degree, specific angle It is obtained by protractor 2, then left locating rod 10 and right locating rod 11 is fixed by rotating the second clamping screw 12, Then by the first chalk renderer 7 of sliding, according to the registration of the first graduation mark 6, so that it is determined that the radius of camber line, determines arc After line radius, the first clamping screw 9 is rotated, the position of the first chalk renderer 7 is fixed, then rotate auxiliary scale 4, draws camber line, After having drawn camber line, then successively by auxiliary scale 4, left locating rod 10 and right locating rod 11 storage (such as Fig. 4 into the inner cavity of main scale 1 It is shown), the bottom of the main scale 1 offers second sliding slot 13, and sliding block 14, the cunning are slidably fitted in the second sliding slot 13 The second chalk renderer 15 is welded on block 14, and the bottom of the second chalk renderer 15 extends to outside the bottom of main scale 1, second Also ledge for chalk on blackboard is offered on chalk renderer 15, ledge for chalk on blackboard is provided with chalk and can be drawn, the bottom of the second sliding slot 13 It is etched with the second graduation mark 16, slides it in second sliding slot 13 by sliding slider 14, drives the second chalk renderer 15 Sliding so as to draw out straight line, and passes through the length of the determining straight line of the second graduation mark 16.

Specifically, the left and right sides of the main scale 1 is mounted on sucker 17, by the way that sucker 17 is arranged, impart knowledge to students at one's leisure Ruler is adsorbed on blackboard.

Specifically, the bottom of 1 inner cavity of main scale is equipped with by block 18, block 18 is leaned on by setting, facilitate auxiliary scale 4 according to It leans on.

Specifically, indicator 19 is installed on the fixed block 8 on 4 right side of auxiliary scale, it is convenient by the way that indicator 19 is arranged Determine the radius of camber line.

Specifically, the fixing axle 3 is located on same axial line with protractor 2, to make the camber line radian drawn out Accurately.

Working principle: rotation auxiliary scale 4 first extracts it out of main scale 1 cavity, while the also left locating rod extracted 10 and right locating rod 11, such as need to draw the camber line that radian is 30 degree, make on the left of left locating rod 10 is attached to, right locating rod 11 are attached to right side, and the radian between left locating rod 10 and right locating rod 11 is 30 degree, and specific angle is obtained by protractor 2, Then left locating rod 10 and right locating rod 11 are fixed by rotating the second clamping screw 12, then pass through sliding first Chalk renderer 7, according to the registration of the first graduation mark 6, so that it is determined that the radius of camber line, after determining radius of curvature, rotation the One clamping screw 9 fixes the position of the first chalk renderer 7, then rotates auxiliary scale 4, draws camber line, after having drawn camber line, then Successively the storage of auxiliary scale 4, left locating rod 10 and right locating rod 11 is slided into the inner cavity of main scale 1 (as shown in Figure 4) by sliding Block 14 slides it in second sliding slot 13, the sliding of the second chalk renderer 15 is driven, so as to draw out straight line.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (5)

1. a kind of Mathematical picture teaching ruler, including main scale (1), it is characterised in that: the amount of being equipped on rear side of the main scale (1) The inner cavity of angle device (2), the main scale (1) is equipped with fixing axle (3), and movable sleeve is connected to auxiliary scale (4), institute on the fixing axle (3) It states and is offered on auxiliary scale (4) first sliding groove (5), is etched with the first graduation mark (6) on the right side of the auxiliary scale (4), described first is sliding The first chalk renderer (7) is slidably fitted on slot (5), the side of the first chalk renderer (7) offers ledge for chalk on blackboard (71), the left and right sides of the first chalk renderer (7) is welded with fixed block (8), and screw thread is installed on the fixed block (8) Have the first clamping screw (9), also movable sleeve is connected to left locating rod (10) and right locating rod respectively on the fixing axle (3) (11), the equal screw thread in top of the left locating rod (10) and right locating rod (11) is equipped with the second clamping screw (12), described The bottom of main scale (1) offers second sliding slot (13), is slidably fitted with sliding block (14), the sliding block on the second sliding slot (13) (14) the second chalk renderer (15) is welded on, and the bottom of the second chalk renderer (15) extends to the bottom of main scale (1) Outside, the bottom etching of the second sliding slot (13) has the second graduation mark (16).

2. a kind of Mathematical picture teaching ruler according to claim 1, it is characterised in that: the left and right of the main scale (1) Two sides are mounted on sucker (17).

3. a kind of Mathematical picture teaching ruler according to claim 1, it is characterised in that: main scale (1) inner cavity Bottom is equipped with by block (18).

4. a kind of Mathematical picture teaching ruler according to claim 1, it is characterised in that: on the right side of the auxiliary scale (4) Indicator (19) are installed on fixed block (8).

5. a kind of Mathematical picture teaching ruler according to claim 1, it is characterised in that: the fixing axle (3) and amount Angle device (2) is located on same axial line.