Abstract: A ratchet wrench handle includes an operation piece which is composed of two partial members including a claw member and a receiving member. The ratchet wrench handle is configured such that, when positive rotation-aimed operation teeth of the claw member are engaged with ratchet teeth of a rotation member, a wedge effect produced by the positive rotation-aimed operation teeth of the claw member and a positive rotation-aimed sloping face of the claw member is configured to make the rotation member stop rotation, which allows an adapter to be rotated in a positive direction.

Abstract: A false triggering prevention device for a spindle self-locking mechanism of an electric tool, includes a blocking member and an elastic element, where the blocking member includes a rotating portion, a connecting portion and a blocking portion that are sequentially connected to one another; one end of the elastic element is connected to a gear; the other end of the elastic element is connected to the connecting portion; the rotating portion is rotatably connected to a self-locking surface of the gear, such that the blocking member has a rotating state and a static state; when the blocking member is in the rotating state, the blocking portion covers a self-locking hole to prevent insertion of the self-locking pin into the self-locking hole; and when the blocking member is in the static state, the blocking portion does not cover the self-locking hole.

Abstract: A miter saw including a base having a plurality of grooves formed in a bottom surface thereof, a table rotatable with respect to the base, a rotary indexing mechanism and a locking mechanism. The rotary indexing mechanism includes a body fixedly connected to and rotatable with the table and a protrusion provided on the body. The protrusion can be received within one of the plurality of grooves in the base and thereby angularly index the table at a desired position with respect to the base. The locking mechanism is operably coupled to the table and is configured to lock the table at the desired position. The miter saw has a more reasonable and practical structure that allows angular indexing and interlocking of the table with respect to the base to be accomplished by a single hand.

Abstract: A working tool includes a housing (10) and a lever (3) having a gap defined therein for accommodating a rotatable switch lock (1). The switch lock has a first engagement portion (1a) defined on a first side and a stopper portion (1b) defined on a second side, and the lever has a support portion (3a) proximal to the first engagement portion. A handle portion of the housing has a left push button (8) and a right push button (5) inserted therein, a first groove (8a) and a second groove (8b) of the left push button (8) and right push button (5) each having a second engagement portion formed on a groove wall thereof, each of a first extension section (3a-2) and second extension sections (3a-1) being provided with, at a side facing a corresponding second engagement portion, a third engagement portion engageable with the corresponding second engagement portion.

Abstract: A working tool includes a housing (10) and a lever (3) having a gap defined therein for accommodating a rotatable switch lock (1). The switch lock has a first engagement portion (1a) defined on a first side and a stopper portion (1b) defined on a second side, and the lever has a support portion (3a) proximal to the first engagement portion. A handle portion of the housing has a left push button (8) and a right push button (5) inserted therein, a first groove (8a) and a second groove (8b) of the left push button (8) and right push button (5) each having a second engagement portion formed on a groove wall thereof, each of a first extension section (3a-2) and second extension sections (3a-1) being provided with, at a side facing a corresponding second engagement portion, a third engagement portion engageable with the corresponding second engagement portion.

Abstract: A cutting-off saw with a safety protection device, including a base; a support arm arranged on the base; a cutting blade coupled to the support arm by a driving head; a fan-shaped fixed guard and a movable guard configured to enclose the cutting blade and can be combined into a single disc; an extension arm coupled to a top portion of the support arm; the movable guard coupled to one end of a guard connecting rod; the other end of the guard connecting rod formed into an arc-shaped elbow and coupled to a stop button and the extension arm. An arc-shaped bayonet having a radian matching with that of the arc-shaped elbow of the guard connecting rod is arranged on a lower portion of the stop button. It ensures that the movable guard will never be turned upwards during the operation of loading or unloading a workpiece.

Abstract: A socket wrench in which a supporting hole is formed in a drive disposed at an operating handle, and a steel ball pressed by a coiled spring is movably engaged with the supporting hole. A recess part for allowing the steel ball to partly engage therein is formed in an inner wall of an assembling hole of a wrench body for allowing the drive to engage therein. A connecting hole engageable with a polygonal head part of a bolt to be operated is formed in the wrench body in such a manner as to be coaxial with the drive. The recess part has a pair of contacting walls for the steel ball to contact therewith, the pair of contacting walls being disposed in mutually intersecting directions.

Abstract: In a ratchet wrench handle, an operation piece is swingably supported by an axis in a handle head. Positive and reverse rotation claws are disposed on one and the other portions of a distal end surface of an operation piece. The operation piece is provided with a cam edge at its backward end surface. A pressing pin is provided in a switch member such that the pressing pin can freely move into and out of the switch member. The distal end of the pressing pin pressurely contacts with the cam edge through a force of a spring. The switch member is located on a line extended from an imaginary straight line running between the rotation axis of the rotation member and the axis of the operation piece.

Abstract: The present invention provides a plug wrench in which a plug can be fitted securely to a wrench body and the plug is not damaged in fitting. The plug wrench comprises a concave fitting portion for inserting the plug in the cylindrical wrench body operated by a rotating handle, a fixing member made of a metal sheet fitted in the concave fitting portion, and a guide member with less hardness fitted on the bottom face of the fitting member.

Abstract: Tire tool of the tire iron type formed entirely by forging from previously unforged steel bar stock having a reverse curved centifuration and depending integral elements formed only by forging operations.