CN209869861U

CN209869861U - Teaching compasses with length measurement

Info

Publication number: CN209869861U
Application number: CN201920519640.1U
Authority: CN
Inventors: 徐金亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-17
Filing date: 2019-04-17
Publication date: 2019-12-31
Anticipated expiration: 2029-04-17

Abstract

The utility model discloses a teaching compasses with length measurement, including the compasses main part, the compasses main part is including scribbling the draw bar, and the rear end of scribbling the draw bar is equipped with the bracing piece, and the front surface of scribbling the draw bar is equipped with chalk installation device, and the front surface of bracing piece is equipped with positioner, and the upper surface spiro union of scribbling the draw bar has fastener, the utility model discloses a compasses main part with positioner, chalk installation device and fastener is provided, when using, fixes a position the compasses main part through positioner, rotates fastening bolt and makes things convenient for location angle, then uses the compasses to draw a circle, in the use of chalk, after the chalk weared and torn the position of fixed rod, the front end of ejector pin pushes up at the surface of blackboard, and the ejector pin moves backward and drives the meshing claw and open and shut, the length of automatic compensation chalk, effectual easy fracture that the unable automatically regulated of length of teaching compasses in the past lead to in the use, Poor drawing effect.

Description

Teaching compasses with length measurement

Technical Field

The utility model relates to a teaching field, specific teaching compasses with length measurement that says so.

Background

The teaching aid is used for explaining a model, a real object, a specimen, an instrument, a chart, a slide show and the like for explaining something, is used for assisting teaching work, comprises teaching equipment, a teaching instrument, practical training equipment, education equipment, experimental equipment, a teaching specimen, a teaching model and the like, and helps students to understand and learn.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a not enough to prior art, the utility model aims at providing a teaching compasses with length measurement, the effectual chalk that has solved the unable automatically regulated of length of chalk in the use in the past of teaching compasses cracked easily, the relatively poor problem of drawing effect.

The utility model provides a technical scheme that its technical problem adopted is: a teaching compass with length measurement comprises a compass main body, the compass main body comprises a painting rod, the rear end of the painting rod is provided with a supporting rod, the front surface of the painting rod is provided with a chalk mounting device, the front surface of the supporting rod is provided with a positioning device, the upper surface of the painting rod is screwed with a fastening device, the chalk mounting device comprises a shell, a sleeve is sleeved on the inner surface of the shell, meshing teeth are arranged on the right surface of the sleeve, the outer surface of the meshing tooth is clamped with a meshing claw, the right surface of the meshing claw is provided with a guide rod, an ejector rod is assembled on the left surface of the front end of the engaging claw, a baffle plate is fixedly installed on the rear surface of the sleeve, a clamping block is fixedly installed on the right side of the ejector rod, and springs are sleeved on the rear surface of the clamping block, the outer surfaces of the baffle and the guide rod, and chalk is assembled on the inner surface of the sleeve.

Furthermore, the front surface of the painting rod is provided with a sleeve opening which is sleeved on the outer surface of the separation blade.

Further, the rear end fixed mounting who scribbles the drawing pole has first connecting axle, trepanning has been seted up to the upper surface center department of first connecting axle, the rear end of bracing piece is equipped with the second connecting axle, the upper surface center department of second connecting axle is equipped with the fixed axle, the last fixed surface of fixed axle installs the separation blade, the screw has been seted up to the upper surface center department of fixed axle.

Further, a rear surface of the second connecting shaft is equipped with a pointer.

Further, positioner includes the connecting rod, the front surface fixed mounting of connecting rod has the sucking disc, the cover groove has been seted up to the rear surface of connecting rod, the dead lever has been cup jointed to the internal surface in cover groove, the rear surface assembly of dead lever is at the front surface of bracing piece, the central department internal surface assembly of sucking disc has magnet.

Further, fastener includes first resistance piece and second resistance piece, the lower fixed surface of first resistance piece installs the upper surface at first connecting axle, the lower surface of second resistance piece closely laminates the upper surface at first resistance piece, the upper surface of second resistance piece closely laminates fastening bolt, fastening bolt's bottom spiro union is at the internal surface of screw.

The utility model has the advantages that: the utility model discloses a compasses main part with positioner, chalk installation device and fastener has been set up, when using, sucking disc and magnet through positioner adsorb on the blackboard surface, insert the chalk to sheathed tube internal surface afterwards, and confirm to scribble the angle that opens of draw bar and bracing piece according to the diameter of certain length, and through rotating fastening bolt, it compresses tightly first resistance piece and the meshing of second resistance piece, thereby make things convenient for the location angle, then use the compasses to draw a circle, in the use of chalk, after the chalk weares and teares the position of fixed rod, the front end of ejector pin pushes up the surface at the blackboard, the ejector pin moves backward and drives the meshing claw and remove to the right side, loosen the meshing tooth, the spring drives sleeve pipe and the chalk and moves one section distance to the outside, thereby reach the purpose of the length of automatic compensation chalk, effectual easy fracture that teaching compasses in the past can's length automatically regulated lead to in the use, Poor drawing effect.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an assembly schematic diagram of the present invention.

Fig. 3 is an enlarged schematic view of the structure at a in fig. 2.

Fig. 4 is an enlarged schematic view of the structure at b in fig. 2.

Fig. 5 is the sectional structure of the positioning device of the present invention.

Fig. 6 is a schematic view of the painting rod structure of the present invention.

Fig. 7 is an enlarged view of the structure at c in fig. 6.

Fig. 8 is a chalk mounting device of the present invention.

Description of reference numerals: 1. the compasses comprise a compasses main body, 11, a painting rod, 12, a first connecting shaft, 13, a sleeve hole, 14, a supporting rod, 15, a second connecting shaft, 16, a fixed shaft, 17, a baffle, 18, a screw hole, 19, a pointer, 110, a sleeve opening, 2, a chalk mounting device, 21, a shell, 22, a sleeve, 23, a meshing tooth, 24, a baffle, 25, a meshing claw, 26, a guide rod, 27, a push rod, 28, a spring, 29, chalk, 3, a positioning device, 31, a connecting rod, 32, a sucker, 33, a sleeve groove, 34, a fixed rod, 35, a magnet, 4, a fastening device, 41, a first resistance sheet, 42, a second resistance sheet, 43 and a fastening bolt.

Detailed Description

The invention will be further described with reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents also fall within the scope of the appended claims.

Referring to fig. 1-8, which are schematic structural diagrams of the present invention, a teaching compass with length measurement comprises a compass main body 1, the compass main body 1 comprises a painting rod 11, a support rod 14 is assembled at the rear end of the painting rod 11, a chalk mounting device 2 is assembled on the front surface of the painting rod 11, a positioning device 3 is assembled on the front surface of the support rod 14, a fastening device 4 is screwed on the upper surface of the painting rod 11, the chalk mounting device 2 comprises a housing 21, a sleeve 22 is sleeved on the inner surface of the housing 21, a meshing tooth 23 is arranged on the right surface of the sleeve 22, a meshing claw 25 is clamped on the outer surface of the meshing tooth 23, a guide rod 26 is assembled on the right surface of the meshing claw 25, a push rod 27 is assembled on the left surface of the front end of the meshing claw 25, a baffle 24 is fixedly installed on the rear surface of the sleeve 22, a fixture block is fixedly installed on the right side of the push rod 27, and, the inner surface of the sleeve 22 is fitted with chalk 29;

the utility model provides a compasses main part 1 with positioner 3, chalk installation device 2 and fastener 4, when using, adsorb on the blackboard surface through positioner's sucking disc 32 and magnet 35, insert chalk 29 to the internal surface of sleeve pipe 22 afterwards, and confirm according to the diameter of certain length and scribble the angle that opens of drawing pole 11 and bracing piece 14, and through rotating fastening bolt 43, mesh first resistance piece 41 and second resistance piece 42 and compress tightly, thereby make things convenient for the location angle, then use the compasses to draw a circle, in the use of chalk 29, after chalk 29 weares and teares the position of fixed rod 27, the front end of ejector pin 27 pushes up at the surface of blackboard, ejector pin 27 moves backward and drives meshing claw 25 and move to the right side, loosen meshing tooth 23, spring 28 drives sleeve pipe 22 and chalk 29 and moves a section distance to the outside, thereby reach the purpose of automatic compensation chalk 29's length, the problems that chalk is easy to break and the drawing effect is poor due to the fact that the length of chalk cannot be automatically adjusted in the using process of the conventional teaching compasses are effectively solved.

Scribble the front surface of drawing pole 11 and seted up the cuff 110, cuff 110 cup joints at the surface of separation blade 24, through the positioning action of separation blade 24, avoids sleeve pipe 22 and chalk 29 to pop out, guarantees the utility model discloses a normal use.

Scribble the rear end fixed mounting of drawing pole 11 and have a first connecting axle 12, trepanning 13 has been seted up to the upper surface center department of first connecting axle 12, the rear end of bracing piece 14 is equipped with second connecting axle 15, the upper surface center department of second connecting axle 15 is equipped with fixed axle 16, the upper surface fixed mounting of fixed axle 16 has separation blade 17, screw 18 has been seted up to the upper surface center department of fixed axle 16, as shown in fig. 2, first connecting axle 12 and second connecting axle 15 are installed at the medial extremity of scribbling drawing pole 11 and bracing piece 14, when using the compasses, after overturning one hundred eighty degrees around fixed axle 16 with bracing piece 14, scribble the outside end rear surface of drawing pole 11 and bracing piece 14 and closely paste together, form the ruler shape, use as the ruler, it is more convenient to use.

The rear surface of the second connecting shaft 15 is provided with a pointer 19, the outer surface of the first connecting shaft 12 is printed with angle scales which correspond to the state shown in fig. 1 as a starting point, the pointer 19 indicates the outer surface of the scales, scale reading of the compasses in the using process can be obtained, and calculation and teaching are facilitated.

Positioner 3 includes connecting rod 31, the front surface fixed mounting of connecting rod 31 has sucking disc 32, trepanning 33 has been seted up to the rear surface of connecting rod 31, dead lever 34 has been cup jointed to the internal surface of trepanning 33, the rear surface assembly of dead lever 34 is at the front surface of bracing piece 14, the internal surface assembly of center department of sucking disc 32 has magnet 35, through the fixed effect of the absorption of magnet 35 and sucking disc 32, make things convenient for positioner 3 to fix at the blackboard surface, the locate mode is nimble reliable.

Fastening device 4 includes first resistance piece 41 and second resistance piece 42, and the lower fixed surface of first resistance piece 41 installs at the upper surface of first connecting shaft 12, and the lower surface of second resistance piece 42 closely laminates at the upper surface of first resistance piece 41, and the upper surface of second resistance piece 42 closely laminates fastening bolt 43, and fastening bolt 43's bottom spiro union is at the internal surface of screw 18.

The utility model discloses the during operation, when using, sucking disc 32 and magnet 35 through positioner adsorb on the blackboard surface, insert chalk 29 to sleeve pipe 22's internal surface afterwards, and confirm to scribble the angle that opens of drawing pole 11 and bracing piece 14 according to the diameter of certain length, and through rotating fastening bolt 43, compress tightly first resistance piece 41 and the meshing of second resistance piece 42, thereby make things convenient for the location angle, then use the compasses to draw the circle, in chalk 29's use, chalk 29 wears to the position back of fixed rod 27, ejector pin 27's front end top is at the surface of blackboard, ejector pin 27 moves backward and drives meshing claw 25 and remove to the right side, loosen meshing tooth 23, spring 28 drives sleeve pipe 22 and chalk 29 and moves one section distance to the outside, thereby reach the purpose of the length of automatic compensation chalk 29.

Claims

1. The utility model provides a teaching compasses with length measurement, includes the compasses main part, its characterized in that: the compasses main part is including scribbling the drawing pole, the rear end of scribbling the drawing pole is equipped with the bracing piece, the front surface of scribbling the drawing pole is equipped with chalk installation device, the front surface of bracing piece is equipped with positioner, the upper surface spiro union of scribbling the drawing pole has fastener, chalk installation device includes the shell, the sleeve pipe has been cup jointed to the internal surface of shell, the meshing tooth has been seted up on sheathed tube right side surface, the surface joint of meshing tooth has the meshing claw, the right surface of meshing claw is equipped with the guide arm, the front end left surface of meshing claw is equipped with the ejector pin, sheathed tube rear fixed surface installs the baffle, the right side fixed mounting of ejector pin has the fixture block, and the surface of the rear surface of fixture block, baffle and guide arm all has cup jointed the spring, sheathed tube internal surface is equipped with the chalk.

2. The teaching compass with length measurement as claimed in claim 1, wherein: the front surface of the painting rod is provided with a sleeve opening which is sleeved on the outer surface of the separation blade.

3. The teaching compass with length measurement as claimed in claim 1, wherein: scribble the rear end fixed mounting of drawing pole and have first connecting axle, the upper surface center department of first connecting axle has seted up the trepanning, the rear end of bracing piece is equipped with the second connecting axle, the upper surface center department of second connecting axle is equipped with the fixed axle, the last fixed surface of fixed axle installs the separation blade, the screw has been seted up to the upper surface center department of fixed axle.

4. The teaching compass with length measurement as claimed in claim 3, wherein: the rear surface of the second connecting shaft is provided with a pointer.

5. The teaching compass with length measurement as claimed in claim 1, wherein: the positioning device comprises a connecting rod, a sucker is fixedly mounted on the front surface of the connecting rod, a sleeve groove is formed in the rear surface of the connecting rod, a fixing rod is sleeved on the inner surface of the sleeve groove, the rear surface of the fixing rod is assembled on the front surface of the supporting rod, and a magnet is assembled on the inner surface of the center of the sucker.

6. The teaching compass with length measurement as claimed in claim 3, wherein: fastening device includes first resistance piece and second resistance piece, the lower fixed surface of first resistance piece installs the upper surface at first connecting shaft, the lower surface of second resistance piece closely laminates the upper surface at first resistance piece, the upper surface of second resistance piece closely laminates fastening bolt, fastening bolt's bottom spiro union is at the internal surface of screw.