Teaching compass capable of drawing dots and lines
A stippling and compass technique, applied in the field of stippling teaching compasses, can solve the problem that teaching compasses cannot directly draw stippling circles or dotted circles, etc., and achieve the effect of convenient, reasonable structure and ingenious conception of drawing stippling circles or dashed circles.
Active Publication Date: 2015-02-04
济宁高新科达科技项目服务有限公司
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Problems solved by technology
[0002] In the teaching process of mechanical drawing and other courses, it is often necessary to draw dotted line circles or dotted line circles on the blackboard. General teaching compasses cannot directly draw dotted line circles or dotted line circles. You can only draw a small dot and then draw a short arc , and then repeatedly intermittently draw dotted line circles or dotted line circles, or first draw a solid line circle and then erase it in small intervals. There is no teaching compasses that can solve this problem better
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[0018] Described a kind of stippling line teaching compasses is mainly by described handle (1), described rotating pin (2), described reinforcing bent piece (3), described screw 1 (4), described drawing circle seat assembly ( 5), the screw II (6) and the center foot (7) constitute. Described drawing circle seat assembly (5) is mainly by described main shaft (8), described round nut (9), described spring (10), described housing (11), described shaft I (12), The walking wheel (13), the bearing (14), the shaft II (15), the cam (17), the one-way bearing (18) and the elastic nut (21) constitute. Described cam (17) has two groups of concave-convex circular arcs of different lengths, which are respectively used for drawing dotted line circles and dotted line circles. The housing (11) has the inner hole I (31), the inner hole II (32) with a cutout, the inner hole III (33), the groove (34), the plane I (35), said inner hole IV (36) and said inner hole V (37). The main shaft (8) has ...
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The invention relates to the field of teaching tools and particularly relates to a teaching compass capable of drawing dots and lines, which is capable of conveniently and regularly drawing dots, lines, circles or dashed circles on a blackboard during teaching. The teaching compass mainly comprises a handle, a rotation pin, a reinforcing bent piece, a bolt I, a circle drawing base assembly, a bolt II and a circle center pin, wherein the circle drawing base assembly mainly comprises a main shaft, a circle nut, a spring, a shell, a shaft I, a walking wheel, a bearing, a shaft II, a cam, a one-way bearing and an elastic nut. The teaching compass is ingenious in design, reasonable in structure and simple to operate, and is capable of drawing full-line circles, dots, lines, circles or dashed circles; the dots, lines, circles or dashed circles can be conveniently drawn; the effect is good.
Description
technical field [0001] The invention relates to the field of teaching tools, in particular to a dotted line teaching compasses which can conveniently and regularly draw dotted line circles or dotted line circles on a blackboard during teaching. Background technique [0002] In the teaching process of mechanical drawing and other courses, it is often necessary to draw dotted line circles or dotted line circles on the blackboard. General teaching compasses cannot directly draw dotted line circles or dotted line circles. You can only draw a small dot and then draw a short arc , and then repeatedly intermittently draw dotted line circles or dotted line circles, or first draw a solid line circle and then wipe it off in a small section. There is no teaching compasses that can solve this problem better. Contents of the invention [0003] In order to solve the above problems, the present invention provides a compass for teaching dot-and-dash lines. [0004] The technical scheme a...
Claims
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Login to View More IPC IPC(8): B43L9/02
CPCB43L9/02
Inventor 杨绍荣
Owner 济宁高新科达科技项目服务有限公司