CN201587239U

CN201587239U - Compass and caliper with ruler

Info

Publication number: CN201587239U
Application number: CN2009201111580U
Authority: CN
Inventors: 施方良
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-28
Filing date: 2009-03-28
Publication date: 2010-09-22
Anticipated expiration: 2019-03-28

Abstract

The utility model provides a compass and a caliper with a ruler. A high intensity arc graduated scale is added at the middle point of a longer compass leg of the compass, two sets of graduations are arranged on the scale surface, and numbers of one set of graduations are relative to the radius of a drawn circle; and the other set of graduations are relative to a field angle of the inner side of two compass legs, thereby conveniently reading and measuring the radius and using for measuring and drawing an angle. The caliper with the ruler can also save a step that the inside diameter and the outside diameter can be obtained only by using a ruler. A magnifying glass or an adjusting plate made of transparent materials is inlaid just above an adjusting plate graduated scale, a magnifying glass is manufactured on the corresponding position, and an adjusting screw can be loosened to control both legs of the compass and the caliper to move or fix.

Description

Campass with rule and clamp

Technical field

The utility model belongs to a kind of compasses and clamp of mark, can reduce and draw bowlder earlier with ruler amount radius, during the amount workpiece, uses the step of ruler again.Also can be used for angulation, draw the angle.Improve precision by magnifying glass.

Background technology

I am when in one's early years teaching Junior High School Geometry, and teaching aid lacks, and has made compasses by oneself, find that the student can draw circle on homework book, and when demonstrating to blackboard, because the compasses size, power thrusts changes, and the center of circle is at the hardboard superior displacement etc., and mapping is painstaking.Added a fixed head on compasses, made student's one hand steered programming round, another hand is the center of circle fixedly, and then has made Campass with rule and clamp.

Summary of the invention

The people of being to be solved in the utility model want to measure radius with ruler earlier making the picture bowlder, get the problem of using ruler again with clamp amount part.The arc chi also is a protractor on compasses, and it is made with steel or highstrenghtpiston.Can increase work efficiency after reducing step as stationery, instrument, specific range of application is arranged.

Campass with rule of the present utility model and clamp, it is characterized in that it has installed an arc chi additional on traditional compasses and clamp, chi one end is fixed on the mid point of a compass foot or clamp one pin, another rule or pincers pin mid point have sliding tray, chi is put in the groove, the chi face has two groups of scales and numeral on compasses, one group of subtended angle corresponding to rule pin inboard, and another is organized corresponding to drawn radius of a circle; Scale and numeral are corresponding to the interior external diameter of measuring object in clamp.

The utility model has a pressing board on the sliding tray of compasses or clamp, pressing board one end is fixed on rule pin or pincers pin, and the other end has set screw, the movable or fixing arc chi by the set screw degree of tightness, thus make rule or pincers bipod folding or fixing.

Campass with rule of the present utility model and clamp is characterized in that pressing board inlays the little magnifying glass of one side above just at rule, or do pressing board with transparent material, and make magnifying glass in the relevant position.The magnifying glass guiding ruler simultaneously has a datum line.

The utility model mapping pen needs the chalk with rule except that blackboard, and other compasses refill for ball-point pen is in order to avoid abrasion reduce precision.Compasses rule pin inboard is done straightly, so that draw angle, angulation.

Description of drawings

Fig. 1 is the structural representation of the utility model Campass with rule, is to see figure in the magnifying glass in the circle.The digital writing direction is convenient to reading.

Fig. 2 is the structural representation of mark bow compass.

Fig. 3 is the structural representation of mark inside plain calipers.

Fig. 4 is the texture edge schematic diagram that Campass with rule and clamp have the sliding tray part.Among the figure, sliding tray 1, magnifying glass 2, set screw 3.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing and compasses and clamp application principle.

Embodiment 1: angulation, picture angle.Angulation is put in the angle on one side with compasses one pin inboard, moves another pin, and when bipod inboard and the coincidence of this angle, the number of degrees on the rule are exactly the number of degrees of institute's angulation.Draw the angle, separately the compasses bipod is found out the number of degrees that will draw the angle on rule, along the inboard angle of drawing.

Embodiment 2: with external diameter in the clamp amount.The amount external diameter opens bow compass, and is directly mobile along institute's beyond the region of objective existence of measure, in the time of can just passing through, sees rule numerical value, is exactly the external diameter of the object of measuring.The amount internal diameter is put into the thing inside of measuring to inside plain calipers, separates inside plain calipers outward, and when reaching maximum, the numerical value of chi is exactly internal diameter.

Claims

1. Campass with rule, it is characterized in that it has installed an arc chi additional on traditional compasses, chi one end is fixed on the mid point of a compass foot, another rule pin mid point has sliding tray, chi is put in the groove, the chi face has two groups of scales and numeral, one group of subtended angle corresponding to rule pin inboard, and another is organized corresponding to drawn radius of a circle.

2. Campass with rule according to claim 1, it is characterized in that above the sliding tray of compasses a pressing board being arranged, pressing board one end is fixed on compass foot, and the other end has set screw, movable or the fixing arc chi by the set screw degree of tightness, thus make rule bipod folding or fixing.

3. Campass with rule according to claim 1 is characterized in that pressing board inlays the little magnifying glass of one side above just at rule, or does pressing board with transparent material, and makes magnifying glass in the relevant position.

4. the mark clamp is characterized in that it has installed an arc chi additional on traditional clamp, and chi one end is fixed on the mid point of a clamp pin, and another pincers pin mid point has sliding tray, and chi is put in the groove, and the scale of chi face and numeral are corresponding to the interior external diameter of measuring object.

5. mark clamp according to claim 4, it is characterized in that above the sliding tray of clamp a pressing board being arranged, pressing board one end is fixed on the clamp pin, and the other end has set screw, movable or the fixing arc chi by the set screw degree of tightness, thus make pincers bipod folding or fixing.

6. mark clamp according to claim 4 is characterized in that pressing board inlays the little magnifying glass of one side above just at rule, or do pressing board with transparent material, and make magnifying glass in the relevant position.