CN2612546Y

CN2612546Y - Automatic rotating calipers

Info

Publication number: CN2612546Y
Application number: CN 03239002
Authority: CN
Inventors: 加娜尔·阿哈什
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-02-19
Filing date: 2003-02-19
Publication date: 2004-04-21
Anticipated expiration: 2013-02-19

Abstract

The utility model belongs to a teaching tool, which relates to an auto-motive compass. The problem of fast measuring radius without rotating the compass by hands is solved. The utility model comprises a compass shaft, a needle bar, an adjustable shelf and a reduction gearbox. The compass shaft is cylindric solid body, and a handle is arranged on top of the compass shaft. The needle bar is arranged on bottom of the compass shaft. The side beam of the adjustable shelf is arranged on the needle bar, and the reduction gearbox is arranged on side of the compass shaft. The utility model has the advantages that carriage and storage are both convenient, and measuring radius is fast. The time of automatic drawing up circles is saved, and work effeciency is improved. Refill exchanging is effortless.

Description

Automatically rotate compasses

Technical field

The utility model belongs to educational aid, relates to a kind of automatic rotation compasses.

Background technology

Draw when circular with existing compasses, measure radius earlier with a yardstick,,, rotate compasses many times with hand if the different a lot of circles of the radius that draws simultaneously need a lot of energy to remove one by one amount radius so with hand slewing circle programming circle.Because the compasses circle that whenever draws must be adjusted once again, so always instability is easy to generate error, occurs one both lost time, energy, strength, the problem such as circular undesirable of drawing sometimes, while change-fountain pen core also is the trouble assignment.

Summary of the invention

The purpose of this utility model is to address the above problem, and a kind of automatic rotation compasses are provided, and it can measure radius easily.

The purpose of this utility model is achieved in that a kind of automatic rotation compasses, and it includes compass shaft, prong bar, adjustable shelf, reduction box; Compass shaft is for being cylindric solid, and its top is provided with handle, and its lower end is provided with the prong bar, and the curb girder of adjustable shelf is sleeved on the prong bar, and reduction box is fixed on the compass shaft side.

The beneficial effects of the utility model are: use, carry, deposit all and make things convenient for, rotate without hand during use, the structure of circle rail own is light and correct during the amount radius, measure radius fast,, save time from the animation circle, increase work efficiency, effortlessly can also change pen core, very big economic and social benefit is arranged, and very big promotional value is arranged.

Description of drawings

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

Fig. 1 is a main TV structure schematic diagram of the present utility model, and Fig. 2 is the utility model A-A sectional structure schematic diagram.

Among the figure 1, handle; 2, reduction box; 3, ratchet mechanism; 4, spring; 5, compass shaft; 6, ratchet shaft; 7 _Ab, big small transmission gear; 8, power transmission shaft; 9, small transmission gear; 10, helical gear; 11, power transmission shaft; 12, prong bar; 13, helical gear; 14 _Ab, crossbeam; 15, tape measure; 16, cylindric curb girder; 17, flexible rule box; 18, control button; 19, base; 20, prong; 21, start writing certainly; 22, adjustable shelf; 23, handle.

The specific embodiment

In Fig. 1,2, it includes compass shaft 5 the utility model, prong bar 12, adjustable shelf 22, reduction box 2; Compass shaft 5 is for being cylindric solid, and its top is provided with handle 1, and compass shaft 5 lower ends are provided with prong bar 12, and the curb girder of adjustable shelf 22 is sleeved on the prong bar 12, and reduction box 2 is fixed on compass shaft 5 sides.Prong bar 12 is a lever-like, and its lower end is provided with prong 20, and adjustable shelf 22 bases 19 are located on the prong bar 12 on prong 20 tops.Adjustable shelf 22 is rectangle rack upper end and the as a whole rectangle rack 22 cylindric curb girders 16 of helical gear 13, is sleeved on prong bar 12 and the base 19 on it.Two parallel crossbeams 14 of rectangle rack 22 _AbBe the expansion link of socket, make to portably use conveniently.The one end is inserted in the rectangle rack 22 cylindric curb girders 16, and the other end connects 21 curb girders of starting writing certainly that stretch out pen core automatically, and two curb girder 16,21 lower ends are connected with tape measure 15, and its flexible rule box 17 is sleeved on rectangle rack 22 cylindric curb girder 16 lower end outer walls.Reduction box 2 is for being upright shape casing, be provided with ratchet mechanism 3 in its upper end, its axle 6 stretches out outside the casing 2, casing 2 outsides are provided with handle 23, the other end is provided with rolling spring 4 in axle 6 casings, and the one end is fixed on the casing 2 end face inwalls, and reduction box 2 ratchet mechanisms 3 bottoms are provided with two parallel power transmission shafts 8,11, jackshaft 8 wherein is provided with the big small transmission gear 7 that is connected as a single entity _Ab, small transmission gear 7 _bWith the engagement of ratchet mechanism 3 gear wheels, big travelling gear 7 _a Helical gear 13 engagements in small transmission gear 9 engagements that are connected as a single entity with transmission helical gear 10 on its following axle 11, transmission helical gear 10 and adjustable shelf 22.Adjustable shelf 22 bases 19 bottoms are discoid, and its top is cylindric, and it is sleeved on prong bar lower end, and is very smooth, make adjustable shelf 22 free and relaxed rotations, and flexible rule box 17 is provided with the button 18 of control tape measure, make the tape measure outreach fixing at any time.

Ratchet mechanism 3 it by excircle band ruler, each the 120 ° axles 6 that are provided with a thrust projection are formed on the excircle of the gear wheel that wherein intracardiac circular hole is the thrust tooth and its assembling, during use the crossbeam 14 of the socket on the adjustable shelf 22 _AbStretch out, prepare the radius of picture circle with tape measure 15 amounts, with control button 18 stationary positioned, do a good job of it handle 1, after prong 20 inserts circular central, turning handle 23 spring 4 rolling-in after, the openhanded of handle 23 opens, at this moment the elastic force of spring 4 makes the gear wheel of ratchet mechanism 3 rotate, and it drives the small transmission gear 7 on the jackshaft 8 _b, big travelling gear 7 _aRotate simultaneously, it drives the small transmission gear 9 on the following axle 11, and helical gear 10 rotates the helical gear 13 that just drives adjustable shelf 22 simultaneously, and whole adjustable shelf rotates the circle of just drawing simultaneously.Draw a plurality of circles and unclamp control button 18, adjust radius distance again after, draw next circularly after the gauge tap stationary positioned again, remaining also is above-mentioned equally operation, not the time spent, the flexible crossbeam of adjustable shelf has contracted and has got final product, at this moment tape measure 15 is involved in the flexible rule box 17.

Claims

1. one kind is rotated compasses automatically, and it includes compass shaft, prong bar, adjustable shelf, reduction box; It is characterized in that: compass shaft is for being cylindric solid, and its top is provided with handle, and its lower end is provided with the prong bar, and the curb girder of adjustable shelf is sleeved on the prong bar, and reduction box is fixed on the compass shaft side.

2. automatic rotation compasses according to claim 1 is characterized in that: the prong bar is a lever-like, and its lower end is provided with prong, and the adjustable shelf base is located on the prong bar on prong top.

3. automatic rotation compasses according to claim 1, it is characterized in that: adjustable shelf is a rectangle rack, the as a whole cylindric curb girder of rectangle rack of upper end and helical gear is sleeved on prong bar and the base on it, two expansion links that parallel crossbeam is socket of rectangle rack, the one end is inserted in the cylindric curb girder of rectangle rack, the other end connects the curb girder of starting writing certainly that stretches out pencil lead automatically, and two curb girder lower ends are connected with tape measure, and its flexible rule box is sleeved on the cylindric curb girder of rectangle rack lower end outer wall.

4. automatic rotation compasses according to claim 1, it is characterized in that: reduction box is for being upright shape casing, be provided with ratchet mechanism in its upper end, its shaft extension outlet external body is provided with handle, the other end is provided with the rolling spring in the axle box, the one end is fixed on the box top inwall, reduction box ratchet mechanism bottom is provided with two parallel power transmission shafts, jackshaft wherein is provided with the big small transmission gear that is connected as a single entity, small transmission gear and the engagement of ratchet mechanism gear wheel, the small transmission gear engagement that is connected as a single entity with the transmission helical gear on its following axle of big travelling gear, the helical gear on transmission helical gear and the adjustable shelf meshes.

5. automatic rotation compasses according to claim 3 is characterized in that: adjustable shelf base bottom is discoid, and its top is cylindric, and it is sleeved on prong bar lower end, and flexible rule box is provided with the button of control tape measure.

6. automatic rotation compasses according to claim 4 is characterized in that: ratchet mechanism it by excircle band ruler, each the 120 ° axles that are provided with a thrust projection are formed on the excircle of the gear wheel that wherein intracardiac circular hole is the thrust tooth and its assembling.