Pin Pen-20190312 https://worldwide.espacenet.com/patent/search/family/074669722/publication/TWI714443B?q=pn%3DTWI714443 TWI714443B A pushpin pen includes a tube body and a plurality of pushpins. The tube body has a front-end portion and a rear end portion. A storage tube portion is provided between the front-end portion and the rear end portion, and the front-end portion includes a deformable neck and a deformable axial collapse portion. The pins are accommodated in the storage tube portion, having a body and a needle portion. The diameter of the body is smaller than the diameter of the storage tube portion and larger than the neck. The diameter of the portion can be passed by the body after the neck is deformed, and the needle portion can be exposed after the axial collapse portion is deformed. Thereby, pressing the tube body to the object to be pinned can complete the pinning action. TWI675657B https://worldwide.espacenet.com/patent/search/family/069189118/publication/TWI675657B?q=pn%3DTWI675657
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