CN202011276U

CN202011276U - Multifunctional telescopic compasses

Info

Publication number: CN202011276U
Application number: CN2011200432789U
Authority: CN
Inventors: 张曼泽
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-02-19
Filing date: 2011-02-19
Publication date: 2011-10-19
Anticipated expiration: 2021-02-19

Abstract

The utility model relates to multifunctional telescopic compasses, which belong to the technical filed of compasses and aim at providing the multifunctional telescopic compasses capable of utilizing chalk heads. The technical scheme is that a frame is in the shape of a reversed U, a handle is installed at the top of the frame through threads, two rotating wheels are hinged inside the frame through a spindle, teeth are processed on one third of the circle of each rotating wheel, and the portions of the rotating wheels with teeth are meshed with each other. A telescopic rod is fixed on the lower portion of the rotating wheel, and a straight rod is fixed on the lower portion of the other rotating wheel. The lower portion of the telescopic rod is hollow-out, a hollow rod is movably sleeved in the lower half portion of the telescopic rod, a set screw is installed in a screw through hole at the lower end of the telescopic rod, the set screw abuts against the hollow rod, and the lower portion of the hollow rod is in a four-claw shape and connected with a clamping ring through threads. The multifunctional telescopic compasses can be used by teachers in teaching.

Description

The multifunction retractable compasses

Technical field

The utility model multifunction retractable compasses belong to the compasses technical field.

Background technology

In the present school, in especially junior middle school, math teachers will be used a lot of educational aids on class, and as rule, compasses, protractor, set square etc., like this, teachers must have a lot of instruments in arms and go to class, and are pretty troublesome also very tired.

Now, most of schools also all are the chalks of usefulness on class, and every chalk is last 1st/3rd, can't use, and in addition, because chalk is easily broken, the little budgust pen that breaks also can't use, and so just makes a lot of chalk heads be not used, and has caused waste.

The utility model content

The utility model overcomes the deficiencies in the prior art, and technical problem to be solved is for providing a kind of multifunction retractable compasses that have multiple function and can utilize the chalk head.

In order to solve the problems of the technologies described above, the technical scheme that the utility model adopted is: the multifunction retractable compasses, comprise support body, runner, expansion link, straight-bar and handle, support body is inverted U-shaped, handle is installed in the top of support body by screw thread, two runners are hinged on the inside of support body by rotating shaft, and two runners all are processed with tooth on 1/3rd circumference, and two runners have the part of tooth to be meshing with each other; In two runners, the below of one of them runner is fixed with expansion link, and the below of another runner is fixed with straight-bar;

The latter half of described expansion link is hollow, the lower end of expansion link has a tapped through hole, be movably installed with hollow stem in the latter half of described expansion link, holding screw is installed in the tapped through hole of expansion link lower end, and described holding screw withstands on the hollow stem, the pintongs claw type of the bottom of described hollow stem for shrinking, and the bottom of described hollow stem is by being threaded retaining ring;

The lower end of described straight-bar is fixed with connecting rod, and the lower end of described connecting rod is spherical, and the lower end and the sucker of described connecting rod pass through globular hinge.

Described straight-bar replaces with rule.

The top of described straight-bar has semicircular mouthful, and protractor is fixed in described semicircle mouthful.

Described rule is folding chi, and the lower end of described rule is connected with the lengthening chi by rotating shaft.

The beneficial effect that the utility model is compared with prior art had is:

1, the utility model is provided with expansion link, can make full use of the chalk of all lengths, makes the chalk head also can be utilized, and has saved resource.

2, straight-bar of the present utility model lower end has replaced traditional thimble with sucker, has avoided the infringement to blackboard.

3, the utility model is provided with protractor and rule on straight-bar, and function of the present utility model like this is more, makes that last class hour of teacher was lighter.

Description of drawings

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

Fig. 1 is the structural representation of the utility model multifunction retractable compasses;

Among the figure: 1 is support body, and 2 is runner, and 3 is expansion link, and 4 is straight-bar, and 5 is handle, and 6 is hollow stem, and 7 is holding screw, and 8 is retaining ring, and 9 is connecting rod, and 10 is sucker, and 11 is protractor, and 12 are the lengthening chi.

The specific embodiment

As shown in Figure 1, the utility model multifunction retractable compasses, comprise support body 1, runner 2, expansion link 3, straight-bar 4 and handle 5, support body 1 is inverted U-shaped, handle 5 is installed in the top of support body 1 by screw thread, two runners 2 are hinged on the inside of support body 1 by rotating shaft, and two runners 2 all are processed with tooth on 1/3rd circumference, and two runners 2 have the part of tooth to be meshing with each other; In two runners 2, the below of one of them runner 2 is fixed with expansion link 3, and the below of another runner 2 is fixed with straight-bar 4;

The latter half of described expansion link 3 is hollow, the lower end of expansion link 3 has a tapped through hole, be movably installed with hollow stem 6 in the latter half of described expansion link 3, holding screw 7 is installed in the tapped through hole of expansion link 3 lower ends, and described holding screw 7 withstands on the hollow stem 6, the pintongs claw type of the bottom of described hollow stem 6 for shrinking, and the bottom of described hollow stem 6 is by being threaded retaining ring 8;

The lower end of described straight-bar 4 is fixed with connecting rod 9, and the lower end of described connecting rod 9 is spherical, and the lower end of described connecting rod 9 and sucker 10 pass through globular hinge.

Described straight-bar 4 usefulness rules replace.

The top of described straight-bar 4 has semicircular mouthful, and protractor 11 is fixed in described semicircle mouthful.

Described rule is connected with lengthening chi 12 for folding chi, the lower end of described rule by rotating shaft.

Using method of the present utility model is: at first, twist retaining ring 8 downwards, chalk is inserted in the hollow stem 6, reserve an amount of length outside hollow stem 6, retaining ring 8 is upwards turned, make the bottom chucking chalk of hollow stem 6; Regulate the position of hollow stem 6 again by holding screw 7, after mixing up, tighten holding screw 7; At last, expansion link 3 and straight-bar 4 are opened certain angle, sucker 10 is adsorbed on the blackboard, can the picture circle.

Straight-bar 4 in the utility model can be folding chi, length that can metric segment, and the chi 12 Rotate 180 degree that will extend can be with original rule lengthening, make when the long line segment of tolerance convenient.

Claims

1. multifunction retractable compasses, it is characterized in that: comprise support body (1), runner (2), expansion link (3), straight-bar (4) and handle (5), support body (1) is inverted U-shaped, handle (5) is installed in the top of support body (1) by screw thread, two runners (2) are hinged on the inside of support body (1) by rotating shaft, two runners (2) all are processed with tooth on 1/3rd circumference, two runners (2) have the part of tooth to be meshing with each other; In two runners (2), the below of one of them runner (2) is fixed with expansion link (3), and the below of another runner (2) is fixed with straight-bar (4);

The latter half of described expansion link (3) is hollow, the lower end of expansion link (3) has a tapped through hole, be movably installed with hollow stem (6) in the latter half of described expansion link (3), holding screw (7) is installed in the tapped through hole of expansion link (3) lower end, and described holding screw (7) withstands on the hollow stem (6), the pintongs claw type of the bottom of described hollow stem (6) for shrinking, and the bottom of described hollow stem (6) is by the retaining ring that has been threaded (8);

The lower end of described straight-bar (4) is fixed with connecting rod (9), and the lower end of described connecting rod (9) is spherical, and the lower end of described connecting rod (9) and sucker (10) pass through globular hinge.

2. multifunction retractable compasses according to claim 1 is characterized in that: described straight-bar (4) replaces with rule.

3. multifunction retractable compasses according to claim 1 and 2 is characterized in that: the top of described straight-bar (4) has semicircular mouthful, and protractor (11) is fixed in described semicircle mouthful.

4. multifunction retractable compasses according to claim 2 is characterized in that: described rule is connected with lengthening chi (12) for folding chi, the lower end of described rule by rotating shaft.