CN2166017Y

CN2166017Y - Teaching multi-function ruler

Info

Publication number: CN2166017Y
Application number: CN 93224409
Authority: CN
Inventors: 张兴武
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-13
Filing date: 1993-09-13
Publication date: 1994-05-25
Anticipated expiration: 2003-09-13

Abstract

The utility model relates to a teaching multi-function ruler. One end of each of a main and a secondary single rulers is respectively provided with a reinforced plate whose thickness is as 1/2 time as thick as the main and the secondary single rulers. A movable turn knob which connects the main and the secondary single rulers together is arranged on the reinforced plate. An angle scale in 180 DEG which uses the turn knob as a dot is marked on the reinforced plate of one single ruler. The centre portion of one single ruler is provided with a chute runner, on which a clamp block is provided. A thin line is arranged at the start position of the graduation line arranged at the outside of the ruler, and a cord clip is arranged on the thin line. The lower ends of the main and the secondary single rulers are respectively provided with a center of a circle fixing needle and a chalk clip. The utility model has the advantages of simple structure, flexible operation, good accuracy and one object with multifunction. Except the functions of general drawing aids, the teaching multi-function ruler can also satisfy the requirement of special drawing (such as an ellipse), and is an ideal teaching tool.

Description

Teaching multi-function ruler

The utility model relates to a kind of drafting instrument.

At present, last how much drawing class hours of teacher, needed with set square, protractor, compasses, ruler, when carrying these drawing tools and these instruments of use inconvenience is arranged: the step of 1. charting is various, as make triangle, ruler generally must move three times, makes the quadrangle ruler and must move four times; 2. poor accuracy as parallelogram, is to adopt the translation method, and the corresponding sides of making are difficult to absolute parallel; 3. very flexible can only be done isosceles and right angled triangle as set square; 4. can not adapt to special drawing requirement, as ellipse, there is not corresponding drawing tool, the teacher is the next definite fixed point of two nails of nail on blackboard often, nail on is that a rope is made ellipse, very inconvenient, and should damage blackboard, when blackboard can not ailing, the teacher has only an end that allows two students pin rope respectively on blackboard, help the teacher to make ellipse, not only trouble and cause student's illusion does not easily reach its intended purposes.At present, a kind of collection compasses, set square, ruler, protractor are not arranged as yet, multiple functions such as drafting ellipse are that the classroom of one occurs with drafting instrument.

The purpose of this utility model is to overcome the deficiencies in the prior art and provides a kind of simple in structure, and is easy to use, and the drawing accurate and flexible can satisfy the teaching multipurpose ruler of the one-object-many-purposes that various special drawing require.

The technical solution of the utility model is: the principle that equates to press from both sides with the triangle both sides one jiao of congruence and tetragonal corner relation according to vertical angles, the plank that equates with two block lengths, width, thickness is the single chi of primary and secondary, single chi one end of primary and secondary is connected with the stiffener that thickness is single chi thickness 1/2 respectively, the single chi stiffener of primary and secondary is superimposed in opposite directions, stiffener one side has a microtia, the swinging arms that the single chi of primary and secondary is linked together is arranged on the microtia, two single chis can be around knob, and it is a long ruler that the single chi of primary and secondary can be set level.The single chi of primary and secondary can draw in.Being marked with the knob at a chi stiffener is 180 ° of angle scales in the center of circle; There is a chute at the middle part of ruler, and a block that can slide along chute is arranged on the chute, and there is a fine rule at ruler graduation mark starting point place, and the fine rule fixing point has wire clips on the fine rule on the same axis of chute; The chalk cangue is arranged on the termination of one chi, and there is the round dot locking pin termination of another chi.

Knob round dot of the present utility model is on the inboard sideline of ruler, the graduation mark of the single chi of primary and secondary inboard is a starting point with the knob center, the other end to two single chis extends respectively, the graduation mark in the primary and secondary ruler outside is that the end with a single chi is a starting point, the terminal point of another single chi is a terminal point and linking to each other successively, and the indexing of angle scale be a counter clockwise direction.

When the utility model is done the protractor use, chi is opened, the inboard of two single chis is overlapped with the limit of measured angle respectively, because vertical angles equate that the visual angle scale can be known the size of measured angle.When making triangle, open ruler, the angle modulation scale is to the angle that requires, screw swinging arms, the primary and secondary ruler is fixed on this angle, make triangle two edge lengths and angle thereof easily, rotate ruler again and connect its both sides end points, can make any angle triangle.Make quadrangle, rectangle, parallelogram, utilize the graduation mark of angle scale and two single chi inboards, determine its both sides and one jiao and make, the rotation ruler is aimed at its two-end-point, and the arm of angle of making symmetry get final product, and is convenient and accurate.Do when oval, two single chi straightening, first slip block utilizes block to determine the distance of ellipse two between fixing a point to the distance between the fine rule fixing point.(block indication scale is) along chi pulling rope, look outside graduation mark and determine at oval moving o'clock to two values of fixing a point, and wire clips is hung on the block again, is close to wire clips with chalk and rotates a week.Do bowlder, open ruler, the distance between two chi terminations is a radius, screws knob and fixes, and points to round dot picture arc with center of circle locking pin and gets final product.Two chi straightening are screwed knob be a long ruler, during use, the single chi of primary and secondary coexists on the plane.

Accompanying drawing is a structural representation of the present utility model.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Among the figure, the single chi 1 of master that length and width, thickness equate, an end of inferior single chi 2 are connected with metal reinforcing plates 4-1, the 4-2 that thickness is single chi thickness 1/2 respectively, two single chi stiffeners are superimposed in opposite directions, stiffener one side has a microtia, the central movable knob 5 that the single chi of primary and secondary is linked together is arranged on the microtia, the center of swinging arms 5 is concordant with the inboard sideline of single chi, and two single chis can rotate around knob 5, are carved with anticlockwise 180 ° of angle scales 3 on main single chi stiffener 4-1.With swinging arms 5 is mid point, is respectively equipped with the corresponding graduation mark 6,7 that extends to the other end in two single chi inboards, during use, can utilize inboard graduation mark 6,7 and angle scale 3 to determine the length and the angle thereof on both sides.It is starting point that there is the lower end with main single chi in the single chi of the primary and secondary outside, the lower end of inferior single chi is the graduation mark that is arranged in order 8 of terminal point, there is fine rule fixing point 9 at main single chi 1 axis, graduation mark 8 starting point places, main single chi outside, be installed with wire clips 11 on the fine rule 10, there is chute 12 at main single chi 1 middle part, and block 13 is arranged in the chute 12, in the lower end of inferior single chi center of circle locking pin 15 is arranged, there is chalk cangue 14 lower end of main single chi, folder chalk when using with affected compasses.

The functions such as the utility model collection ruler, set square, compasses, protractor are all over the body, compared with prior art, have simple in structure, multiple functional, drawing is convenient, use flexibly, accuracy is good, the advantages such as one-object-many-purposes; The function that not only has conventional drafting instrument, and can also satisfy special drawing (such as ellipse) requirement. Not the time spent collapsible, be convenient for carrying.

Claims

1, a kind of teaching multipurpose ruler comprises that both sides indicate the single chi (1) of primary and secondary, (2) of scale, knob (5), and angle scale (3) is characterized in that:

1. primary and secondary chi one end respectively has a stiffener (4) for the single chi thickness 1/2 of primary and secondary, the single chi stiffener of primary and secondary (4) is superimposed in opposite directions, stiffener (4) one sides have a microtia, and the swinging arms (5) that the single chi (1) of primary and secondary, (2) are linked together is arranged on the microtia;

2. being marked with the knob at a single chi stiffener is the anticlockwise 180 ° of angle scales in the center of circle (3);

3. there is a fine rule (10) at graduation mark (8) starting point place, the ruler outside, and there is a chute (12) at the middle part of this chi, and block (13) is arranged on the chute (12), and fine rule fixing point (9) has wire clips (11) on the fine rule (10) on the same axis of chute;

4. the lower end of the single chi of primary and secondary has center of circle locking pin (15) respectively, chalk cangue (14).

2, multipurpose ruler as claimed in claim 1 is characterized in that said knob (5) round dot is on the inboard sideline of ruler.

3, multipurpose ruler as claimed in claim 1, the graduation mark (6), (7) that it is characterized in that the single chi of primary and secondary inboard are starting point with knob (5) central point, the other end to two single chis extends respectively, the graduation mark (8) in the single chi of the primary and secondary outside is that the end with main scale is a starting point, and the terminal point of inferior single chi is a terminal point and linking to each other successively.

4, multipurpose ruler as claimed in claim 1 is characterized in that the single chi length and width of said primary and secondary, thickness are identical.