ELECTRIC SCISSORS

• US 20130247384A1
• Filed: 05/16/2013
• Published: 09/26/2013
• Est. Priority Date: 01/30/2009
• Status: Active Grant

• Current Assignee: Max Co Limited (., Max)
• Original Assignee: Max Co Limited (., Max)
• Inventors: ISHIGURO, Hiroki
• Granted Patent: US 9,832,936 B2
• Time in Patent Office: Days
• US Class Current: 30/228
• CPC Class Codes: A01G 3/037 the driving means being an electric motor
• CPC Class Codes: A01G 3/08 Other tools for pruning, branching or delimbing standing trees
• CPC Class Codes: B26B 15/00 Hand-held shears with motor-driven blades

Abstract

Electric scissors (1A, 1B) is provided with: a first blade (2A, 2B); a second blade (3A, 3B); a toggle link mechanism (7A, 7B) including a first link (71A, 71B), a second link (72A, 72B), and a drive shaft (70A, 70B); and a drive section (5, 6). One end of the first link (71A, 71B) is rotatably connected to a transmission portion (21A, 21B) of the first blade (2A, 2B). One end of the second link (72A, 72B) is rotatably connected to a transmission portion (31A, 31B) of the second blade (3A, 3B). The other end of the first link (71A, 71B) is rotatably connected to the other end of the second link (72A, 72B) through the drive shaft (70A, 70B). The drive section (5, 6) is configured to open/close the first blade (2A, 2B) and the second blade (3A, 3B) by displacing the drive shaft (70A, 70B) in a direction perpendicular to an axial direction of the drive shaft (70A, 70B).

Claims

1-4. -4. (canceled)

5. Electric scissors comprising:

a first blade including a cutting edge portion and a transmission portion, and rotatably supported by a shaft serving as a fulcrum;

a second blade including a cutting edge portion and a transmission portion, wherein an object between the first blade and the second blade is cut by closing the first blade and the second blade;

a toggle link mechanism including a first link, a second link, and a drive shaft; and

a drive section,

wherein one end of the first link is rotatably connected to said transmission portion of the first blade,

one end of the second link is rotatably connected to said transmission portion of the second blade,

the other end of the first link is rotatably connected to the other end of the second link through the drive shaft, and

the drive section is configured

to close the first blade and the second blade by displacing said drive shaft in a direction of increasing an angle between the first link and the second link, and

to open the first blade and the second blade by displacing said drive shaft in a direction of decreasing said angle between the first link and the second link,

wherein the drive section includes a motor to be rotatably driven, and a ball screw mechanism configured to convert a rotation of the motor into a linear motion and to transmit the linear motion to said drive shaft of said toggle link mechanism,

wherein the ball screw mechanism includes a screw shaft and a nut portion configured to linearly move along the screw shaft by rotating the screw shaft,

wherein the drive shaft is connected to the nut portion via a transmission member,

wherein a guide shaft is provided in the nut portion, and

wherein one end of the transmission member is pivotally connected to the drive shaft and the other end of the transmission member is pivotally connected to the guide shaft such that rotation of the transmission member around the guide shaft moves the drive shaft so as to be off of the longitudinal axis of the screw shaft of the ball screw mechanism when the first blade and the second blade are closed.