CN204278865U

CN204278865U - With the rope compasses of handle

Info

Publication number: CN204278865U
Application number: CN201420762889.2U
Authority: CN
Inventors: 赵小健
Original assignee: Jiangxi University of Technology
Current assignee: Jiangxi University of Technology
Priority date: 2014-12-08
Filing date: 2014-12-08
Publication date: 2015-04-22
Anticipated expiration: 2024-12-08

Abstract

The utility model relates to a kind of rope compasses with handle, and it comprises: handle (1), it central shaft (10) comprising handle (9) and be fixed in this handle (9) end side; Along away from this central shaft of the direction (10) of handle (9) being provided with successively dial (2) and having the tape device (3) of clamping function, the end of this central shaft (10) is equiped with centring means (4); Wherein, in this tape device (3), be provided with rope (5), can rotate around central shaft (10) by rope (5) tape device (3); The upper position relative with central shaft (10) center of this centring means (4) is provided with centering member (14).The utility model can accurately positioning centre, chalk trace can not be affected, directly can read arc angle, easy to use and repair.

Description

With the rope compasses of handle

Technical field

The utility model relates to a kind of drawing tool for teaching, particularly relates to a kind of rope compasses with handle at blackboard upper drawing circle arc.

Background technology

Traditional educational compasses is formed primarily of handwriting, rotating shaft, compasses leg, compasses point, draws bowlder and fixes on blackboard by compasses point, rotates rotating shaft and carries out picture circle; There is certain problem in the compasses of this traditional structure, such as volume is comparatively large, is inconvenient to carry; Rotating shaft can drive compasses point to rotate when rotating, cause being not steady on one's legs, and easily hurt blackboard; Be fixed on chalk in handwriting and do not there is flexibility, easily fracture.The rope compasses announced at present improve traditional compasses, as the patent of invention " a kind of rope compasses " that application number is 201310185695.0, these compasses to solve in traditional compasses that volume is large, the problem such as to be not steady on one's legs, but still there are following defects: 1) adopt sucker as the center of circle, cause home position inaccurate, and easily wipe the chalk trace of home position; 2) adopt tape measure easily to wipe chalk trace off as making line piece, and once damage, change inconvenience; 3) angle of circular arc cannot directly be determined; 4) lack handle, be inconvenient to hold.

Summary of the invention

The purpose of this utility model, be to provide a kind of can accurately positioning centre, chalk trace can not be affected, directly can read arc angle, the easy to use and compasses repaired.

Above-mentioned purpose of the present utility model is achieved through the following technical solutions: with the rope compasses of handle, it comprises: handle, it central shaft comprising handle and be fixed in this handle end side; Along away from this central shaft of direction of handle being provided with successively dial and having the tape device of clamping function, this center the tip of the axis is equiped with centring means; Wherein, in this tape device, be provided with rope, can rotate around central shaft by rope tape device; Position relative with central shaft center on this centring means is provided with centering member.

Preferably, described tape device also comprises flexible rule box, clamping button; This flexible rule box inside is provided with wind spring, and the one end being positioned at this rope of flexible rule box inside connects this wind spring, and this flexible rule box is provided with the hole passed for this rope.

Preferably, described centring means also comprises compressing tablet, spring, centering member fixture; This centering member to be inserted in the endoporus of this centering member fixture and exposed end; This spring is pressed in this centering member, and this compressing tablet covers this spring and is pressed on the endoporus bottom surface of centering member fixture.Using the centering member with spring as centring means, there is little to blackboard damage, not easily skidding, center of circle accurate positioning advantage.

Preferably, the center hole wall of described dial is provided with draw-in groove, and this central shaft is provided with the fastener coordinating described draw-in groove.

Preferably, described dial is marked with angle index, to facilitate the circular arc drawing special angle.

Preferably, described central shaft and centring means are for being threaded.

The beneficial effects of the utility model are:

(1) using centering member (as draw point) as the center of circle; Home position is accurate, and can not wipe the chalk trace of home position;

(2) using flexible rope as making line piece, there is flexible rotation, shrink freely, not easily wipe the advantage of chalk trace; The words that rope breaks down can be changed at any time; And rope can directly be enclosed within chalk, with holding chalk not frangibility, thus add the practicality of mapping;

(3) design of dial, directly can read the angle of circular arc;

(4) there is handle, convenient assurance;

Below in conjunction with preferred embodiment, the utility model is described in further detail.

Accompanying drawing explanation

Fig. 1 is the structural representation with the rope compasses of handle in the utility model one embodiment;

Fig. 2 is the STRUCTURE DECOMPOSITION figure with the rope compasses of handle in the utility model one embodiment;

Description of reference numerals: 1-handle; 2-dial; 21-draw-in groove; 22-fastener; 3-tape device; 4-centring means; 5-rope; 6-chalk; 7-clamps button; 8-rope sling; 9-handle; 10-central shaft; 11-flexible rule box; 12-compressing tablet; 13-spring; 14-centering member; 15-centering member fixture.

Detailed description of the invention

Below in conjunction with embodiment, to above-mentioned being described in more detail with other technical characteristic and advantage of the utility model.

Fig. 1, Fig. 2 are respectively with the structural representation of the rope compasses of handle and STRUCTURE DECOMPOSITION figure in the utility model one embodiment, and it comprises handle 1, dial 2, the tape device 3 with clamping function and centring means 4 that central shaft 10 is housed; Described dial 2, tape device 3 and centring means 4 are all installed on central shaft 10; Described tape device 3 can rotate around central shaft 10 under the effect of rope 5, and then realizes the function of picture circle.

Described handle 1 comprises handle 9 and central shaft 10; Described handle 9 is fixed on central shaft 10 one end; The other end of described central shaft 10 is threaded.

The center hole wall of described dial 2 is provided with draw-in groove 21, and this central shaft 10 is provided with the fastener 22 coordinating described draw-in groove.Design like this easily can fix dial, prevents it from rotating.

Described tape device 3 comprises flexible rule box 11, rope 5, clamping button 7 and rope sling 8; Described flexible rule box 11 inside is provided with wind spring, and side has aperture; One end of described rope 5 penetrates the aperture of flexible rule box 11 and is connected with the wind spring of its inside, and rope 5 can close at the inside of flexible rule box 11 under the effect of wind spring; The other end of rope 5 is connected with rope sling 8, and rope sling 8 is for entangling chalk 6.

Described centring means 4 comprises compressing tablet 12, spring 13, centering member 14, centering member fixture 15; Centering member 14 can be inserted in the endoporus of centering member fixture 15 and to expose the needle point of certain length; Spring 13 is pressed in centering member 14, and compressing tablet 12 covers spring 13 and can be pressed on the endoporus bottom surface of centering member fixture 15; Under the cushioning effect of spring 13, centering member 14 can be had a certain amount of contraction by during pressure.In the present embodiment, this centering member 14 is draw point.

Rope compasses with handle described in the utility model are in the process used, chalk 6 entangles by first step rope sling 8, then pull out rope 5 be adjusted to arc radius length, then press clamping button 7 rope 5 is clamped, as long as at this moment rope 5 rotates, then flexible rule box 11 does synchronous rotary thereupon; Second step holds handle 1 with one, is pressed on blackboard by the center of circle of the tip alignment circular arc of draw point 14, and another holds chalk 6 can picture circle; As long as determine when drawing circular arc that the original position of rope 5 on dial 2 and final position directly can read the angle of circular arc; After 3rd step arc drafting, first taken out from rope sling 8 by chalk 6, then clicking clamping button 7 can unclamp rope, and rope 5 automatically can be contracted in flexible rule box 11 under the effect of wind spring.

Above-described embodiment is only be described preferred embodiment of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that the utility model claims determine.

Claims

1., with rope compasses for handle, it is characterized in that it comprises:

Handle (1), it central shaft (10) comprising handle (9) and be fixed in this handle (9) end side; Along away from this central shaft of the direction (10) of handle (9) being provided with successively dial (2) and having the tape device (3) of clamping function, the end of this central shaft (10) is equiped with centring means (4);

Wherein, in this tape device (3), be provided with rope (5), can rotate around central shaft (10) by rope (5) tape device (3); The upper position relative with central shaft (10) center of this centring means (4) is provided with centering member (14).

2., as claimed in claim 1 with the rope compasses of handle, it is characterized in that described tape device (3) also comprises flexible rule box (11), clamping button (7); This flexible rule box (11) inside is provided with wind spring, and the one end being positioned at inner this rope (5) of flexible rule box (11) connects this wind spring, and this flexible rule box (11) is provided with the hole passed for this rope (5).

3., as claimed in claim 1 with the rope compasses of handle, it is characterized in that described centring means (4) also comprises compressing tablet (12), spring (13), centering member fixture (15); This centering member (14) to be inserted in the endoporus of this centering member fixture (15) and exposed end; This spring (13) is pressed in this centering member (14), and this compressing tablet (12) covers this spring (13) and is pressed on the endoporus bottom surface of centering member fixture (15).

4. the rope compasses with handle as described in claim 1 or 3, is characterized in that described centering member (14) is draw point.

5., as claimed in claim 1 with the rope compasses of handle, it is characterized in that the center hole wall of described dial (2) is provided with draw-in groove (21), and this central shaft (10) is provided with the fastener (22) coordinating described draw-in groove.

6. the rope compasses with handle as described in claim 1 or 5, is characterized in that described dial (2) is marked with angle index.

7., as claimed in claim 1 with the rope compasses of handle, it is characterized in that described central shaft (10) and centring means (4) are for being threaded.