132results about How to "Improve fastening strength" patented technology

A blind bolt and a blind nut system wherein the blind bolt comprises a bolt main body having an oblong hole and a locking piece rotatably supported within the oblong hole. The locking piece is provided with a pair of rotary protrusions and a pair of pieces holding rotary protrusions projecting outwardly. The oblong hole includes a pair of rotation supporting grooves to accommodate the rotary protrusions and support rotary motion, and a pair of piece holding grooves to accommodate the piece holding the piece holding protrusions.

A bicycle fastener includes a fixing assembly (1) and a fastener assembly (3). The fixing assembly (1) is fixedly mounted to the frame (5) of the bicycle, and the fastener assembly (3) is used for supporting an article. The first moveable seat (31) and the second moveable seat (32) of the fastener assembly (3) are snapped into the first fixing seat (11) and the second fixing seat (12) of the fixing assembly (1) correspondingly, so that the fastener assembly (3) and the supported article are detachedly mounted to the frame (5) of the bicycle. The bicycle fastener can facilitate the disengaging and engaging of the article, prevent wear of the surface of the article, and enhance the fixing strength of the fastener assembly.

Provided are: an exchangeable tip cutting tool in which breakage of the threaded section and breakage of the thread ridges during installation of the machining head and under increased cutting load during cutting are limited and which is capable of performing machining with high efficiency; and a machining head and a holder to be used in the exchangeable tip cutting tool. The flank angle (α) of the pressure flank (11) is set to be larger than the flank angle (β) of the clearance flank (12); and a holder (2, 2a) having a female threaded fastening section (8) wherein the angle of the screwing surface of the pressure flank is set to be larger than the angle of the screwing surface of the clearance flank.

A terminal processing structure of a coaxial cable includes a core wire, an insulator with which an outer periphery of the core wire is covered, a braid with which an outer periphery of the insulator is covered, and an outer sheath with which an outer periphery of the braid is covered. The outer sheath is divided into a distal piece and a proximal piece by being notched along a circumferential direction in a cable distal end and the distal piece is held in a position separate from the proximal piece and thereby an exposed part of the braid to which a braid crimp part of a shield terminal is crimped is formed between the distal piece and the proximal piece and also a distal end of the braid is covered with the distal piece.

A panel member 10 for an automobile includes a hem portion 18 roll-fastened in a state of overlapping an outer panel 14 and an inner panel 16. At the hem portion 18 of the panel member 10, the outer panel 14 and the inner panel 16 are roll-fastened in a state that a front end face 14a of the outer panel 14 and a front end face 16a of the inner panel 16 are respectively rolled-in by the inner panel 16 and the outer panel 14.

A scanning microscope probe in which a palladium covering film is formed on the surface of the protruding portion of a cantilever, and the base end portion of a nanotube is disposed in contact with the palladium covering film with the tip end portion of the nanotube protruding to the outside, thus allowing the tip end to be used as a probe needle end for detecting signals. A coating film is formed to cover all or part of the surface of this base end portion, and the nanotube is thus firmly fastened to the cantilever. Since the base end portion adheres tightly to the palladium covering film, both of them are electrically continuous. This palladium covering film allows, as an electrode film, the application of a voltage to the nanotube or the passage of an electric current through the nanotube, showing also good adhesion to the nanotube and cantilever.

In a fastening method of press-fitting and fixing an axial end section of a second-stage pinion (1) into a circular opening (21) of a first-stage planetary carrier (2), at first press-fitting external teeth (13a), which have an addendum circle larger than an addendum circle of the other pinion part and has a sharp tooth top, are generated through manufacturing of tooth-cutting at an outer circumferential section of the axial end portion of the second-stage pinion (1). Then, a press-fit bore (22) that has a smaller diameter than the addendum circle of the press-fitting external teeth (13a), is formed at the circular opening (21) of the first-stage planetary carrier (2). The press-fitting external teeth (13a) are then press-fitted into the press-fit bore (22) so that tooth tops thereof cut into an inner circumference surface of the press-fit bore (22) to secure fastening strength between the second-stage pinion (1) and the first-stage planetary carrier (2).

The invention provides a guidewire, which can make sure bonding strength between a coil and a core shaft containing tungsten having bad wettability with brazing metal, and can enhance torque transmission performance. The guidewire (1) includes a core shaft (2) and a coil body (3) that covers the core shaft (2). The guidewire also includes a tip portion, an intermediate fixing portion, and a proximal-end fixing portion that fix the core shaft (2) and the coil body (3) to each other. The coil body (3) includes a single core wire formed of a tungsten wire and a single side wire formed of a stainless steel wire. The side wire is wound around the core wire so as to cover the outer periphery of the core wire.

A vehicle structure body includes: a vehicle interior member; an exterior member; and a fastening portion in which a first fastening seat of the vehicle interior member and a second fastening seat of the exterior member are fastened and fixed to each other in a state of being disposed to face each other. A first fastening part to which a first fastener is attached with a shaft portion of the first fastener, and a second fastening part to which a second fastener is attached with a shaft portion of the second fastener are provided adjacent to each other. An input direction of a shear load that is applied to the shaft portion of the first fastener in an orthogonal direction and an input direction of a shear load that is applied to the shaft portion of the second fastener in an orthogonal direction differ from each other.

The transformer has a bobbin, a coil assembly and a magnetic core assembly. The bobbin is mounted in the magnetic core assembly and has multiple connecting pins being formed on at least one side of a bottom surface of the bobbin. Each connecting pin has a top surface as a soldering surface that corresponds to a solder pad on a back of a circuit board. At least one fastener is further formed on the bottom surface of the circuit board. Therefore, when the transformer is mounted through the circuit board, the connecting pins are soldered on the back of the circuit board to reduce the total thickness of the combination of the transformer and the circuit board.

The invention discloses a bidirectional-fastened ultrasonic osteotomy knife, which comprises a shell, wherein a piezoelectric actuator and an ultrasonic vibrator are arranged at one end of the interior of the shell, and the ultrasonic vibrator is connected to the piezoelectric actuator; a sleeve is arranged on the ultrasonic vibrator; and the sleeve extends from the other end of the shell. According to the osteotomy knife disclosed by the invention, a long through slot is arranged on the sleeve and a connecting pillar which is arranged on a knife rod is capable of extending out of the long through slot, therefore the knife rod can be moved inside the sleeve as a sliding block is moved so as to remove the length of the knife rod; when the sliding block is moved nearby some limiting groove, the connecting pillar can be screwed into the limiting groove by rotating the knife rod, at which time two tension springs at the tail end of the moving knife rod are gradually tightened and winding force, which is in the radial direction of the knife rod, is generated between the two tension springs, so that the connecting pillar on the knife rod is firmly fastened in a semicircular clamping groove under the action of force in two directions; and the osteotomy knife is high in fastening strength and is also quite convenient in adjusting mode.

A fuel cell includes: two end plates that sandwich a cell stack from both ends thereof in a stacking direction; a side member that defines a distance between the two end plates; a connecting bolt that connects the end plates and the side member by a bolt axial force acting substantially in the stacking direction; and a stopper portion that is provided in at least one of the end plates, and that contacts a surface of the side member that extends in the stacking direction and that is located substantially opposite from the cell stack.