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Compass with telescopic fixed needle

A needle positioning and compass technology, which is applied in the field of shrinkable needle positioning compasses, can solve the problems of stabbing fingers and unsafe retracting and retracting compasses, and achieve the effect of avoiding finger stabbing and safe and reliable retracting and retracting

Inactive Publication Date: 2014-06-11
ZAOYANG NO 2 EXPERIMENTAL ELEMENTARY SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The compasses are used for the positioning of the fixed needle under the fixed needle leg. The cone head of the fixed needle is sharp, and if you are not careful, it will stab your finger. When the compasses are idle, because the fixed needle is exposed, it is difficult to retract the compasses. left a very unsafe hidden danger

Method used

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  • Compass with telescopic fixed needle

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Embodiment Construction

[0008] Attached figure 1 Shown: The compass is a hollow structure on the fixed needle leg 1, and a groove 4 is provided on the side of the fixed needle leg 1. The adjusting slide handle 3 connected above the fixed needle 2 is located in the groove 4, in the fixed needle A screw cap 5 for adjusting the expansion and fixation of the fixed needle 2 is provided under the leg 1.

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Abstract

The invention provides a compass with a telescopic fixed needle. The compass is characterized in that a fixed needle supporting leg is of a hollow structure, one side of the fixed needle supporting leg is provided with a strip-shaped groove, an adjusting sliding handle which is connected to the upper part of the fixed needle is positioned in the strip-shaped groove, and a rotating cap which is used for adjusting the fixed needle to stretch and contract and fixing the fixed needle is arranged under the fixed needle supporting leg. When the compass provided by the invention is in use, the fixed needle can be adjusted to stretch out and contract in the fixed needle supporting leg through the loosening and the fastening of the rotating cap, thus the fixed needle can stretch out when the compass is in use, the fixed needle can contract in the fixed needle supporting leg when the compass is folded, a phenomenon of puncturing a finger can be prevented, and the compass is facilitated to be safely and reliably folded.

Description

Technical field [0001] The invention relates to a compass, in particular to a compass with a retractable fixed needle. Background technique [0002] Compasses are used by relying on the positioning of the fixed needle under the fixed needle leg. The cone of the fixed needle is sharp, and if you are not careful, it will stab your fingers. When the compass is idle, the fixed needle is exposed, which makes the compass retractable. It left a very unsafe hidden danger. Summary of the invention [0003] The invention provides a compass with a retractable fixed needle, which allows the fixed needle to be retracted into the leg when the compass is idle. [0004] The invention includes the fixed needle of the compass and the upper fixed needle leg. The technical solution adopted is that the compass has a hollow structure on the fixed needle leg, and a groove is provided on one side of the fixed needle leg. An adjustment sliding handle connected above the needle is located in the strip groo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L9/02B43L9/24
Inventor 胡煜璠
Owner ZAOYANG NO 2 EXPERIMENTAL ELEMENTARY SCHOOL
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