Abstract: A rotary electric shaver with an outer cutter having a circular shaving top surface with numerous hair introduction openings and an inner cutter having a small cutter slidably rotating in contact with a bottom surface of the outer cutter. The rotary electric shaver includes an outer cutter set wherein the outer cutter is assembled in an outer cutter holding unit and an inner cutter set wherein the inner cutter is assembled in an inner cutter holding unit. The outer cutter set and the inner cutter set are respectively provided with a positioning convex portion on one and a positioning concave portion on the other. The positioning convex portion can fit in the positioning concave portion such that the outer cutter set can be assembled with the inner cutter set only in a case where the outer cutter set and the inner cutter set are in a predetermined assembly position.

Abstract: A rotary electric shaver includes an outer blade whose upper surface functions as annular shaving surfaces and having multiple hair inlets formed therein, and an inner blade that has a small blade which rotates while coming into sliding contact with a lower surface of the outer blade from below the annular shaving surfaces and. At least a portion of the multiple hair inlets is formed in an elongated hole shape extending along a radial direction of the annular shaving surfaces and, and an end portion (alternatively, both end portions and) in the radial direction has a widened portion (alternatively, and) which is open wider in a circumferential direction than a central portion.

Abstract: There is provided a rotary electric shaver whose outer blade can smoothly move along skin, which can reliably catch any type of hair, and which can prevent the skin from being damaged due to deep shaving. A rotary electric shaver includes an outer blade whose upper surface functions as annular shaving surfaces having multiple hair inlets formed therein and an inner blade that has a small blade which rotates while coming into sliding contact with a lower surface of the outer blade from below the annular shaving surfaces. The outer blade is configured so that the hair inlets are juxtaposed by changing the circumferential distance in a predetermined circumferential area on the annular shaving surfaces.

Abstract: A pressing tool in which, according to work content, an exchange tool is held so as to be capable of being exchanged by attachment/detachment by a locking bolt penetrating through a mounting portion provided to the tool main body, and the exchange tool is actuated by a pressing member. The outer periphery of the shank of the locking bolt is provided with: an annular groove for locking, arranged on the bolt-head side so as to be partially discontinuous; a release groove extending from the discontinuous part of the annular groove toward the tip of the bolt along the shank at an incline so as to gradually get shallower; and a retaining annular groove formed on the shank further toward the tip of the bolt than the release groove, the bolt-head side inner wall of the retaining annular groove being formed as a tapered incline. The mounting part is provided with a locking pin that fits into the locking annular groove, the release groove, and the retaining groove and that is capable of moving between the grooves.

Abstract: A reciprocating-type electric shaver includes a head unit that is arranged so as to be capable of oscillating at least forward to and rearward from a main body. The head unit has multiple blade units whose inner blades and come into sliding contact with an inner surface of outer blades and reciprocate rightward and leftward. At least one of the blade units is configured to serve as a movable blade unit which is held by a blade frame of the head unit so as to be vertically movable from the reference position between a predetermined upper position and a predetermined lower position, and the blade frame has a positioning lever which performs positioning by moving the movable blade unit to a desired position.

Abstract: There is provided a rotary electric shaver which can improve cutting quality and can prevent a blade edge from becoming blunt. A rotary electric shaver according to the present invention includes a blade unit which has an outer blade having multiple hair inlets formed therein and an inner blade rotating while coming into sliding contact with a lower surface of the outer blade. The inner blade has multiple small blades, and the small blades are formed in a shape in which rake angles of a blade edge are a small angle and a large angle depending on radial positions.

Abstract: In a reciprocating-type electric shaver, an inner blade has an attachment groove which is open downward in a lower end of a side edge. An inner peripheral portion of the attachment groove has an engagement groove which is recessed in an in-plane direction on a wall surface of the side edge and in a longitudinal direction of the inner blade. An inner blade base has a projection at a position corresponding to the attachment groove. The projection can be elastically deformed in the in-plane direction on the wall surface of the side edge and in the longitudinal direction of the inner blade, and is formed so that an engagement claw disposed in a distal end of the projection can enter and engage with the engagement groove. The engagement claw engages with the engagement groove, thereby causing the inner blade to be fixed to the inner blade base.

Abstract: A pressing tool in which, according to work content, an exchange tool is held so as to be capable of being exchanged by attachment/detachment by a locking bolt penetrating through a mounting portion provided to the tool main body, and the exchange tool is actuated by a pressing member. The outer periphery of the shank of the locking bolt is provided with: an annular groove for locking, arranged on the bolt-head side so as to be partially discontinuous; a release groove extending from the discontinuous part of the annular groove toward the tip of the bolt along the shank at an incline so as to gradually get shallower; and a retaining annular groove formed on the shank further toward the tip of the bolt than the release groove, the bolt-head side inner wall of the retaining annular groove being formed as a tapered incline. The mounting part is provided with a locking pin that fits into the locking annular groove, the release groove, and the retaining groove and that is capable of moving between the grooves.

Abstract: In a rotary electric shaver according to the present invention, a plurality of blade units that include an outer blade having an annular shaving surface on an upper surface and an inner blade rotating in sliding contact with a lower surface of the outer blade are arranged in a head unit held by a main body so as to be tiltable. A main drive shaft outputting drive force of a motor accommodated in the main body and a rotary shaft of any one blade unit out of the plurality of blade units are connected by a movable joint, and a position of the movable joint serves as a tilting fulcrum for tilting the head unit.

Abstract: A rotary electric shaver provided with a plurality of cutter units, each of which has an outer cutter (72) and an inner cutter (84), which rotates while elastically contacting the outer cutter from below. The shaver comprising: a plurality of outer cutter assemblies (70), each of which is made integral with a cutter circumferential rim (74) having the outer cutter of each cutter unit secured thereto and which is movably retained in a mounting port formed in the cutter frame (66), a pushup plate (92) which contacts the outer cutter assembly from below to push up the outer cutter assembly, a cutter retaining plate (90) which is retained by the cutter frame and which is positioned below the pushup plate, and an outer cutter float spring (94) which is compressively interposed between the cutter retaining plate and the pushup plate to impart an upward return tendency to the pushup plate.

Abstract: A rotary electric shaver with an outer cutter having a circular shaving top surface with numerous hair introduction openings and an inner cutter having a small cutter slidably rotating in contact with a bottom surface of the outer cutter. The rotary electric shaver includes an outer cutter set wherein the outer cutter is assembled in an outer cutter holding unit and an inner cutter set wherein the inner cutter is assembled in an inner cutter holding unit. The outer cutter set and the inner cutter set are respectively provided with a positioning convex portion on one and a positioning concave portion on the other. The positioning convex portion can fit in the positioning concave portion such that the outer cutter set can be assembled with the inner cutter set only in a case where the outer cutter set and the inner cutter set are in a predetermined assembly position.

Abstract: A method of manufacturing an outer cutter of a rotary electric shaver that includes the outer cutter and an inner cutter which is slidingly in contact with a bottom surface of the outer cutter and rotates, in which a plurality of the circular shaving surfaces are integrally formed in the outer cutter in a concentric manner, and round hole-shaped hair introduction openings are formed in at least one of the circular shaving surfaces includes (a) a step of grinding or polishing a predetermined position where the round hole-shaped hair introduction openings are formed in the circular shaving surface to obtain a thickness size smaller than an inner diameter size of the round hole; and (b) a step of forming the round hole-shaped hair introduction openings in the position where the grinding or the polishing is performed by pressing, after the step (a).

Abstract: A reciprocating electric shaver with a shaving unit which includes an outer cutter(s) an inner cutter(s), a motor, and a drive mechanism all formed into a single unit and is provided to make a pivot motion in left and right directions, the shaving unit being supported in the grip section of the shaver by a pair of pivot parts provided on the front and back sides of the motor, and the head part, which includes the outer cutter(s), the inner cutter(s), and the drive mechanism, being provided to pivot front and back with respect to the motor.

Abstract: A rotary electric shaver includes an outer cutter case secured to the outer periphery of an outer cutter and having a sliding surface formed on the outer periphery. An outer cutter case holder is fitted in a mounting port to vertically move with an upper limit position restrained and pivotably holds the outer cutter case to guide the sliding surface. A pushup plate imparts an upward return tendency to an outer cutter case assembly including the outer cutter, the outer cutter case and the outer cutter case holder. The outer periphery of the outer cutter case is provided with a projection extending to the upper surface of the outer cutter frame, serving as a stopper which prevents the outer cutter case from sinking into the mounting port. This arrangement prevents the outer cutter from being caught by the inner edge of the mounting port and improves shaving performance.

Abstract: An inner cutter, which is used for a rotary shaver, including a plurality of blade supports formed so as to be raised from an inner cutter main body and provided with cutter blades formed, respectively, at the tip ends of the raised blade supports, with positions where the blade supports are raised being located more forward in the direction of rotation of the inner cutter than the leading edge positions of the cutter blades.

Abstract: A rotary electric shaver including cutter units, each having an outer cutter and an inner cutter rotating in resilient contact with the inner surface of the outer cutter, further including a shaver head which is pivotably provided on the shaver main body; an outer cutter frame attached to the shaver head to support the outer cutters in a depressible fashion; a main drive shaft for transmitting, via a first universal joint, the rotation of a motor housed in the shaver main body to a driving mechanism provided inside the shaver head; inner cutter drive shafts provided in the shaver head and rotationally driven by the driving mechanism; and second universal joints for transmitting the rotation of the inner cutter drive shafts to the inner cutters; and in this shaver the first universal joint being disposed near the pivotal center of the shaver head.