CN201304821Y

CN201304821Y - Multi-purpose folding ruler for blackboard teaching

Info

Publication number: CN201304821Y
Application number: CNU2008202179961U
Authority: CN
Inventors: 刘华
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-18
Filing date: 2008-11-18
Publication date: 2009-09-09
Anticipated expiration: 2018-11-18

Abstract

The utility model relates to a multi-purpose folding ruler for blackboard teaching. The multi-purpose folding ruler is formed by connecting a hanging ruler, a graduated ruler, an additional ruler and a circle drawing ruler, and the graduated ruler is connected with the hanging ruler and the circle drawing ruler, a sliding groove is respectively arranged on the hanging ruler, the graduated ruler and the additional ruler; the additional ruler is connected between the hanging ruler and the graduated ruler in an overlapping way, and a bisectrix graduated circle is arranged at the end part of the graduated ruler; and a chalk inserting hole is arranged on the circle drawing ruler. The utility model can finish various drawing at any place on a blackboard, such as vertical, horizontal, oblique lines and other straight lines, a square grid, a grid shaped like a Chinese character 'tian', a grid shaped like a Chinese character 'mi', a circle, an ellipse, and various deformation triangles and quadrilaterals, measure the length of line segment and the included angle, and also be used for hanging teaching maps; teachers show various demonstrations in the process of drawing, thereby improving the thinking ability and the level of innovation of students; and the multi-purpose ruler facilitates the teaching of teachers.

Description

Black board teaching is used folding rule more

Technical field

The utility model relates to teaching aid, and particularly a kind of black board teaching is used folding rule more.

Background technology

For to student's impart knowledge, the teacher must carry out multiple teaching demonstration on blackboard.Especially went up for how much class hours, teacher must be by drawing a picture, and methods such as reasoning from logic are resolved the generation and the application thereof of various laws.Students has the good mathematical basis, with make they on deeper study and work road from now on so that the life in all can lifelong benefit.Black board teaching drawing demonstration be unable to do without various teaching aids such as ruler, set square, compasses, protractor, also need adopt wall chart to do explanation in detail in depth sometimes.So far, instructors is still continued to use traditional method, promptly before the class according to saying content, is ready to be carried on the classroom with a pile teaching aids such as the big or small chi that mates of blackboard, rule, devices, so that be used at any time.Thereby the upper and lower class of teacher all must held in both hands these teaching aids, and is convenient inadequately really.And for the student, watch teacher to use single ruler, compasses, set square, protractor to finish and draw a picture, also be difficult to from the process of system picture obtain associative thinking, and then enhance memory, improve learning interest.

Summary of the invention

The utility model proposes a kind of black board teaching and use folding rule more, purpose is to substitute all functions of finishing multiple single teaching aid, to provide convenience for teacher imparts knowledge to students by using this to use the folding rule teaching aid one more, and understanding for student's study provides help.

The utility model technical solution:

The utility model is formed by connecting by a plurality of monomer chis, and the junction is provided with rotating shaft, and described monomer chi is mainly and hangs chi, rule, additional chi, draws the circle chi.Wherein, rule is connected in and hangs between chi and the picture circle chi, hang chi, rule, additional chi along long to center line respectively be provided with chute, the two ends of additional chi are connected between suspension chi and the rule by placing the screw stack in the chute, rule and the end semicircular in shape of drawing circle chi junction, the center of circle of this semicircle coincide with the center of circle of the rounded ends of drawing the circle chi and are connected.

Further technical solution of the present utility model:

Described suspender is formed by being inverted " U " ring and pivot pin, and pivot pin passes the end that hangs chi, and two ends are connected with collar extension; Set translation suspension member is " U " ring-type on the blackboard, and collar extension is established the hole, and the iron wire or the thin bar that are provided with horizontal drawing between the both sides on blackboard top penetrate in the hole, and suspender is connected by the nail axle with the translation suspension member.The end of described rule semicircular in shape is set to branch angle line calibration circles such as circumference, and the scale related scale is provided with the length value graduation mark; Being parallel to chute on the chi face of additional chi is provided with and is provided with the standby figure that can move rotation in chute that is connecting screw in fixing standby figure folder or the chute and presss from both sides and standby screw; Draw circle chi and rule when rotating shaft is rotated into mutual vertical configuration, one of them chi limit of drawing the circle chi engages with the semicircular diameter in rule end, and the front of drawing round chi is fixed with valve rubber, and valve rubber is provided with several chalk jacks along length to center line.In addition: the utility model for convenience, the screw that maybe need move adjusting to need rotations (rotating shaft) all adopts the goat's horn screw, screw has pad.

The beneficial effects of the utility model:

(1) the utility model one chi is used more.It hangs the rotation that chi, rule, picture circle chi all can be made any direction around the rotating shaft that interconnects, cooperate additional chi of utilization and acknowledgment copy thereof, the teacher can finish the optional position on blackboard various drawing, as various straight lines such as it is longitudinal and transverse, oblique to draw on blackboard as required and grid, matts, double check with a core etc.; Can also substitute the circle that compasses draw and differ in size on blackboard, and draw oval; Can demonstrate or draw various deformation triangles, quadrangle, trapezoidal etc.; Can record the length of line segment and the angle of tolerance angle; And do leg-of-mutton stability and tetragonal unstability research etc.In addition: also can be used as and hang the school wall map that uses on the classroom.

All demonstrations when (two) the utility model passes through teacher's drawing have increased students ' thinking ability, help improving their innovation level.

(3) the utility model has reduced and has prepared the trouble of multiple drawing teaching aid before the class for teacher's teaching provides convenience, and has prevented that the teacher from because of in case carelessness is omitted, leaving behind the harmful effect that a certain teaching aid causes.

Description of drawings

Accompanying drawing 1 is a structural representation of the present utility model:

Accompanying drawing 2 is split state diagram of the present utility model;

Accompanying drawing 3 is received for the utility model and is disturbed view;

Accompanying drawing 4 hangs the connection status figure of chi suspension member and blackboard translation suspension member for the utility model.

The specific embodiment

As shown in Figure 1,

The utility model mainly is made up of suspension chi 1, rule 2, additional chi 3, picture circle chi 4.The two ends of rule are connected in by screw rotating shaft 5 and hang chi and draw between the circle chi, hang chi and rule and additional chi along long to center line respectively be provided with suspension chi chute 11, rule chute 21, add chi chute 31.Additional chi is connected by the set screw stack that places two ends in the additional chi chute and hangs between chi and the rule.

As shown in Figure 1, 2,

The end semicircular in shape of rule, and be provided with circumference sub-multiple angle graduation mark circle; Draw the circle chi and be " b " shape, promptly draw circle chi chi body inboard chi limit, with the circle footpath of its rounded ends on same straight line.The front of drawing the circle chi is fixed with valve rubber 42, and valve rubber is provided with several chalk jack 43 along long to center line together with the chi body.Seen in the figure, what be provided with on the chi face of additional chi is that the standby figure that fixes presss from both sides 32.

As shown in Figure 3,

Suspension chi of the present utility model, rule, picture circle chi all can be around connecting rotating shaft in omnibearing rotation, additional chi can be superimposed upon by set screw and hang on the chi, therefore the utility model becomes the folding rule of tackling all problems at once again, and can erectly hang up abreast with blackboard surface by suspender.Seen in the figure, be provided with the standby figure folder that is connecting screw in the chute of additional chi.

As shown in Figure 4,

The suspender of described suspension chi is made up of split ring 12 and pivot pin 13, and pivot pin passes the end that hangs chi, and two ends are connected with the collar extension of split ring.But suspender is connected with set translation suspension member 6 on the blackboard by nail axle 14; This translation suspension member also is an opening " U " ring, and collar extension is established the hole, and the iron wire or the thin bar that are provided with horizontal drawing between the both sides on blackboard top penetrate in the hole.

Below in conjunction with accompanying drawing, sketch using method of the present utility model:

(1) draw long vertical line: this folding rule of move left and right is to the needs position, and the expansion folding rule is stretching, can optionally draw vertical line on blackboard.

(2) draw horizontal line, oblique line: adopt rule up and down or angular movement is arranged, can on blackboard, arbitrarily draw horizontal line and oblique line.

(3) draw square, matts, double check with a core: the method for employing picture vertical line, horizontal line, oblique line is used and gets final product.

(4) draw circle: chalk is cut into segment, fill in the slotting chalk hole from drawing the round chi back side, because the toughness of front rubber blanket, chalk can displacement in slotting chalk hole, left hand is pinned the rotating shaft axle between rule and the picture circle chi, the right hand is controlled picture circle chi, is rotated counterclockwise from the rule lower left to get final product in a week; Just operate again if draw several concentric circles at a few budgust pens of picture circle chi top plug; Or with a certain slotting chalk hole as the center of circle, operate the picture circle with the distance in this center of circle to another slotting chalk hole again as radius.

(5) draw ellipse: one of line taking, take off two standby screws from additional chi again, and be equal to distance between two-screw, institute's line taking is enclosed within lopping on two screws according to two focal lengths will making ellipse, left hand is pinned picture circle chi then, and the right hand is held chalk sleeve and strained rotation in coil and get final product.

(6) draw triangle or deforming triangle: use and hang chi, rule, additional chi operation, as long as move the additional set set screw of chi, one ruler is wherein appointed in push-and-pull, just can get various triangles.

(7) picture quadrangle or distortion quadrangle: will hang chi, rule, additional chi, draw the expansion of circle chi, additional chi one end is connected and hangs on the chi, the other end is connected on the picture circle chi, because of all tie points all movable, so the square that can draw, rectangle, trapezoidal, parallelogram figures.

(8) angle of tolerance length and the angle and a certain angle value that draws: adopt rule just can finish.

(9) wall chart: adopt the set standby figure folder that is connected with the goat's horn screw of additional chi, and the clamping plate length direction that rotation goat's horn screw presss from both sides figure is parallel to ground, just can presss from both sides school wall map.

To sum up, the utility model has reached the goal of the invention of expection.

Claims

1, black board teaching is used folding rule more, be formed by connecting by a plurality of monomer chis, the junction is provided with rotating shaft, it is characterized in that: described monomer chi is mainly the suspension chi, rule, additional chi, draw the circle chi, wherein, rule is connected in and hangs between chi and the picture circle chi, hang chi, rule, additional chi along long to center line respectively be provided with chute, the two ends of additional chi are connected between suspension chi and the rule by placing the screw stack in the chute, rule and the end semicircular in shape of drawing circle chi junction, the center of circle of this semicircle coincide with the center of circle of a rounded ends of drawing the circle chi and are connected.

2, black board teaching according to claim 1 is used folding rule more, it is characterized in that: the front of motor of described suspension chi and rule is provided with suspender, and this suspender is connected with set translation suspension member on the blackboard.

3, black board teaching according to claim 2 is used folding rule more, it is characterized in that: described suspender is formed by being inverted " U " ring and pivot pin, and pivot pin passes the end that hangs chi, and two ends are connected with collar extension; Set translation suspension member is " U " ring-type on the blackboard, and collar extension is established the hole, and the iron wire or the thin bar that are provided with horizontal drawing between the both sides on blackboard top penetrate in the hole, and suspender is connected by the nail axle with the translation suspension member.

4, black board teaching according to claim 1 is used folding rule more, it is characterized in that: the end of described rule semicircular in shape is set to branch angle line calibration circles such as circumference, and the scale related scale is provided with the length value graduation mark.

5, black board teaching according to claim 1 is used folding rule more, it is characterized in that: described described picture circle chi is " b " shape, promptly draw circle chi chi body inboard chi limit, with the circle footpath of its rounded ends on same straight line.

6, black board teaching is used folding rule more according to claim 1 or 5, it is characterized in that: the front of described picture circle chi is fixed with valve rubber, and valve rubber is provided with several chalk jack along long to center line together with the chi body.

7, black board teaching according to claim 1 is used folding rule more, it is characterized in that: be parallel to chute on the chi face of described additional chi and be provided with in fixing standby figure folder or the chute and be provided with standby figure folder and the standby screw that is connecting screw.

8, black board teaching according to claim 1 is used folding rule more, it is characterized in that: described revolve the axle or screw be the goat's horn screw.

9, black board teaching according to claim 1 is used folding rule more, it is characterized in that: the screw that the standby figure that is provided with in the described additional chi chute presss from both sides connection is the goat's horn screw.