Circle drawing matched device
A technology for drawing circles and sleeves, applied to circular curve plotters, printing, writing utensils, etc., can solve the problems of lack of convenience, cumbersome use, etc.
Pending Publication Date: 2018-07-31
GUANGZHOU INST OF RAILWAY TECH
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The device lacks the convenience of drawing circles of any size in the operation of drawing circles, and it is too cumbersome to use
Method used
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[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.
[0022] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.
[0023] Unless otherw...
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The invention relates to a circle drawing matched device. The circle drawing matched device comprises a sleeve, an expansion body, an inflating body and a control switch, wherein the expansion body isarranged in the sleeve; an expansion part is arranged at the end of the expansion body; the expansion part is loaded with liquid used for enabling the expansion part to form a standard circle; the inflating body communicates with the expansion body and used for injecting gas into the expansion body and enabling the expansion part to expand into a circular ring; and the control switch is arrangedon the sleeve and is in opening-closing fit with a gas channel in the expansion body. When the circle drawing matched device is used, gas can be injected by the inflating body into the expansion bodyand squeezes the expansion part, due to the fact that the expansion body is loaded with liquid used for enabling the expansion part to form a standard circle, the expansion part expands into the circular ring, and then the circular circumferential line can be drawn by using another pen to draw a line along the outer edge of the expansion part. In this way, the amount of gas entering the expansionpart is controlled through the control switch, circles with any diameter can be drawn, and the demands of circle drawers are met.
Description
technical field [0001] The invention relates to the technical field of circle drawing instruments, in particular to a supporting device for drawing circles. Background technique [0002] At present, the main frame of the circle drawing device in the industry is composed of a centering rod frame, a sliding device, a locking device, and an adjustable line drawing rod frame. The relationship between the devices changes, and the centering rod and the line drawing rod are used to adjust the half-diameter of the circle. This device lacks the convenience of drawing a circle of any size in the operation of realizing drawing a circle, and it is also too cumbersome to use. Contents of the invention [0003] Based on this, it is necessary to provide a supporting device for drawing circles, which is convenient for drawing circles of any size. [0004] Its technical scheme is as follows: [0005] A supporting device for drawing a circle, comprising: a sleeve; an expansion body, the ...
Claims
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Login to View More IPC IPC(8): B43L9/00
CPCB43L9/00
Inventor 李宏
Owner GUANGZHOU INST OF RAILWAY TECH