Seam ripper

Patent metadata

Field	Value
Publication number	US-2019104794-A1
Application number	US-201816134281-A
Country	US
Kind code	A1
Filing date	Sep 18, 2018
Priority date	Oct 6, 2017
Publication date	Apr 11, 2019
Grant date	—

Abstract

A seam ripper includes a metal blade member, a handle and a slider. The blade member is supported by the handle and made of a shaft and a blade part at an end of the shaft. The slider causes the blade member to move between a retracted position and an advanced position. The shaft is housed in the handle at the retracted position. The blade part and at least a portion of the shaft are outside the handle at the advanced position. The blade part includes a cutting blade flanked by a needle portion and a ball-shaped portion. When the blade member is at the retracted position, the entirety of the needle portion is housed in the handle, and a portion of the cutting blade is exposed to the outside of the handle.

First claim

1 . A seam ripper comprising:
a metal blade member including a shaft and a blade part provided at an end of the shaft; a handle supporting the metal blade member; and a slider that slides the metal blade member between a retracted position and an advanced position, the shaft being housed in the handle at the retracted position, the blade part and at least a portion of the shaft being positioned outside the handle at the advanced position, wherein the blade part includes a cutting blade, a needle portion and a ball-shaped portion, the needle portion and the ball-shaped portion being arranged to flank the cutting blade in a first direction perpendicular to an axis of the shaft, when the metal blade member is at the retracted position, an entirety of the needle portion is housed in the handle while at least a portion of the cutting blade is exposed outside the handle.

2 . The seam ripper according to claim 1 , wherein the handle includes a main body to house the shaft, a first housing part to house the needle portion, and a second housing part to house at least part of the ball-shaped portion, the first and the second housing parts being spaced apart from each other in the first direction and both connected to the main body,
the first housing part comprises a first guide surface formed with a first opening to pass the needle portion, the second housing part comprises a second guide surface formed with a second opening to pass the ball-shaped portion, the first guide surface and the second guide surface are configured to approach each other as proceeding toward the main body.

3 . The seam cutter according to claim 1 , wherein the slider comprises: a slide base holding a base end of the shaft; an operating member including a tongue provided outside the handle; and a linkage mechanism that links the slide base and the operating member,
the handle is provided with a first guide and a second guide, the slide base being movable along the first guide, the operating member being movable along the second guide.

4 . The seam ripper according to claim 3 , wherein the first guide extends linearly, and the second guide is spaced apart from the first guide in the first direction and at least partially nonparallel to the first guide.

5 . The seam ripper according to claim 4 , wherein the second guide is curved to be convex outwardly.

6 . The seam ripper according to claim 3 , wherein the linkage mechanism comprises an engagement projection and an engagement recess that engages with the engagement projection, the engagement projection being provided at one of the slide base and the operating member, the engagement projection being provided at the other one of the slide base and the operating member.

7 . The seam ripper according to claim 6 , wherein the engagement projection and the engagement recess have a variable engagement depth depending on a position of the slide base along the first guide.

8 . The seam ripper according to claim 1 , further comprising a holding mechanism configured to releasably hold the metal blade member at the retracted position.

9 . The seam ripper according to claim 8 , wherein the holding mechanism comprises an anchoring projection provided on the slider and an anchoring hole provided in an inner wall of the handle and engaging with the anchoring projection.

Assignees

• Clover Mfg Co Ltd

Inventors

• Iwasaki Chihiro
• Tanaka Atsushi

Classifications

• A41H31/005 Primary

  Thread-cutting or seam-ripping tools · CPC title

• B26B1/08

  with sliding blade {(with detachable blades B26B5/001)} · CPC title

• D05B89/00

  Seam-ripping devices · CPC title