Novel bow compass
A compass, a new type of technology, used in circular curve plotters, devices to prevent slippage, printing, etc., can solve the problems of difficulty in aligning the center of the circle, inconvenient use, and large size of the compasses. Round center, not easy to break effect
Inactive Publication Date: 2010-06-23
陈干忠
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Problems solved by technology
[0002] In teaching, it is difficult to determine the center of the circle when the compass used by the teacher to demonstrate the drawing is inconvenient to use, and the compasses are large in size
Method used
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Embodiment Construction
[0008] The structure of the present invention is as figure 1 As shown, a new type of compasses, including a scale 1, one end of the scale 1 is provided with a suction cup 2, the suction cup 2 is connected with the scale 1 through a universal joint 3, the scale 1 is provided with a pen cover 4, and the scale 1 adopts a telescopic structure .
[0009] When in use, suck the suction cup 2 on the blackboard, put chalk in the pen cover 4, adjust the length of the scale 1 according to the required circle radius to draw a circle, shrink the scale 1 for easy placement when not in use.
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The invention discloses a novel bow compass which comprises a dividing rule, wherein one end of the dividing rule is provided with a sucking disc, the sucking disc is connected with the dividing rule by a cardan joint, a pen cap is arranged on the dividing rule, and the dividing rule adopts a telescopic structure. The invention has the characteristics of convenient alignment of the center of a circle and convenient circle description and carrying.
Description
technical field [0001] The invention relates to a compass, in particular to a novel compasses. Background technique [0002] It is difficult to determine the center of the circle when the compass used by the teacher to demonstrate drawing is used in teaching, which is inconvenient to use, and the compasses are large in size. Contents of the invention [0003] The purpose of the present invention is to provide a novel compasses with good fixity and small volume. [0004] The purpose of the present invention is achieved in that a novel compass includes a scale, one end of the scale is provided with a suction cup, the suction cup is connected with the scale through a universal joint, the scale is provided with a pen cap, and the scale adopts a telescopic structure. [0005] Because the present invention adopts the above structure, it is easier to determine the center of the circle than ordinary compasses, and the chalk is not easy to break, and the retractable scale is easy ...
Claims
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IPC IPC(8): B43L9/04B43L12/00G01B3/10
Inventor 陈乾忠
Owner 陈干忠