Foldable miter saw having a safety device

Patent metadata

Field	Value
Publication number	US-9925688-B2
Application number	US-201514872548-A
Country	US
Kind code	B2
Filing date	Oct 1, 2015
Priority date	Feb 3, 2015
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A foldable miter saw includes a base unit, a worktable, a cutting unit, and a safety device. The cutting unit can be set between a working position where the saw blade and the worktable define therebetween a contained angle within 90°˜45° angle and a folded position where a stoppage signal is provided to power off the driver. The arrangement of the safety device enables a power supply to be cut off from the driver automatically when the cutting unit is moved to the folded position.

First claim

What is claimed is:

1. A foldable miter saw, comprising:
a base unit comprising a front edge, a rear edge opposite to said front edge, a bottom wall extended from said front edge to said rear edge, and a top wall opposite to said bottom wall;
a worktable rotatably mounted at said base unit, said worktable comprising a work surface disposed opposite to said bottom wall and corresponding to said top wall and an axle holder facing toward said rear edge and connected to said work surface, said axle holder comprising an axis extending in a direction from said rear edge toward said front edge disposed in parallel to said work surface;
a cutting unit comprising a rotating member axially mounted at said axle holder of said worktable and rotatable relative to said base unit and said worktable, a support arm pivotally connected to said axle holder, a saw blade mounted at said support arm, and a driver mounted at said support arm and adapted for driving said saw blade to rotate, wherein said cutting unit is convertible between a working position and a folded position such that in the working position, a contained angle within 90° to 45° is formed between the saw blade and said work surface, and in the folded position, a peripheral edge of said saw blade is disposed in proximity to said work surface and facing toward said work surface; and
a safety device connected to said rear edge of said base unit and adapted for cutting off a power supply from said driver when said cutting unit is set in said folded position,
wherein said safety device comprises a pressing member fixed relative to one of said worktable or said base unit, and a sensor connected to said rotating member of said cutting unit and wherein said sensor is located away from said pressing member when said cutting unit is in said working position, said sensor is moved into contact with said pressing member and triggered by said pressing member to cut off the power supply of said driver when said cutting unit is moved to said folded position, and
wherein the pressing member comprises a contact portion protruded from a peripheral edge of the pressing member, and the sensor is rotated away from the contact portion in the working position and rotated toward the contact portion in the folded position to contact said contact portion.

2. The foldable miter saw as claimed in claim 1 , wherein said sensor is one of a micro switch, a limit switch, or a toggle switch.

3. The foldable miter saw as claimed in claim 1 , wherein the rotating member has a plurality of locating holes spaced from one another at predetermined angles for locking the cutting unit at predetermined contained angles.

4. The foldable miter saw as claimed in claim 1 , wherein said axle holder of said worktable further comprises a shaft extending along said axis adapted for accommodating said rotating member of said cutting unit; said pressing member comprises a non-circular positioning hole configured to be mounted to said shaft; said sensor comprising a sensing portion facing toward said contact portion and pressable by said contact portion.

Assignees

• Rexon Ind Corp Ltd

Inventors

• Lin Ju Zhen
• Kuo Ya Pin

Classifications

• B23D45/14

  for cutting otherwise than in a plane perpendicular to the axis of the stock, e.g. for making a mitred cut · CPC title

• B23D45/044

  the saw blade being adjustable according to angle of cut (B23D45/025 takes precedence) · CPC title

• B27B5/29

  Details; Component parts; Accessories · CPC title

• B27G19/02 Primary

  for circular saws · CPC title