Abstract: A ball joint, which is composed of a ball pin, a retainer connected with the ball pin and an elastic joint seal having first and second apertures for covering the ball pin and the retainer. The ball joint is assembled very easily by pressing the ball pin against the second aperture of the joint seal which has been previously set on the retainer, at a predetermined relative speed higher than 20 cm/s after applying lubricant on the inner peripheral face of the second aperture of the joint seal.

Abstract: A claw-pole stepping motor with rotor, including a vibration reducing magnet. Vibration in the axial direction is suppressed by having a correction force, which overcomes a force produced by a vertical motion caused when the rotor is pulse-driven, and keeps the rotor attracted to one side. The corrective force is generated between an index generating magnetized portion in a lower area of the rotor and a soft magnetic material base. Magnetic flux leakage produced by the excitation of the stator coils of the motor is suppressed by providing a shield ring made of a magnetic material on an inner side of the rotor magnet, which minimizes the magnetic flux flowing from the coils to the revolving shaft, and noises on the recording and reproducing head are thereby greatly reduced.

Abstract: A magnetic tape having formed on its backcoating layer 5 a recess 10 of prescribed shape capable of yielding an optical contrast to provide optical information with which servo tracking of data tracks on the magnetic layer is effected, the recess having a depth of 0.05 to 1 .mu.m and a width of 0.25 to 30 .mu.m, and the backcoating layer 5 having an arithmetic mean roughness Ra of 4 to 20 nm.

Abstract: A magnetic recording medium comprising a substrate having an uppermost magnetic layer containing ferromagnetic metal powder and a lower magnetic layer which is adjacent to the uppermost magnetic layer, wherein the uppermost magnetic layer has an average dry thickness of 0.03 to 0.5 .mu.m, the ferromagnetic metal powder in the uppermost magnetic layer is orientated in the horizontal direction of the magnetic recording medium, the magnetic recording medium has a coercive force of 120 kA/m or higher in the horizontal direction thereof, and a ratio of a maximum magnetic susceptibility .chi..sub.max with an external magnetic field applied in the direction perpendicular to the magnetic recording medium to a magnetic susceptibility .chi..sub.8 with an external magnetic field of 8 kA/m applied in the same direction, .chi..sub.max /.chi..sub.8, is 1.3 or higher.

Abstract: A housing 3 of a female connector 1 has a receiving space 5 for a slide lock member 15 and a resilient member 17, and this receiving space 5 is provided near to a terminal receiving chamber 7 for receiving a connection terminal. The slide lock member 15 is slidable in a fitting direction, and retains a mating connector, and has a release projection 16 which is pressed when releasing the fitting. The receiving space 5 has an opening 6 through which part of the slide lock member 15 is exposed to the exterior. Half-fitting prevention lock stoppers 8 for limiting the movement of the mating connector are formed respectively at opposed sides of the receiving space 5.

Abstract: A lamp socket is disclosed. The lamp socket comprises a socket body engaged with a lamp, a cylindrical hood accommodating a light emitting portion of the lamp, the hood having a first end portion formed integrally with the lamp socket, and a second end portion forming a peripheral edge of an opening in which the lamp can be inserted therefrom, a flange provided on an outer peripheral face of the hood and abutting against a peripheral edge of a mounting hole in a panel, an elastic engaging portion disposed on the outer peripheral face of the hood and engaging with the peripheral edge of the mounting hole in the panel, and a protecting portion provided at both sides of the elastic engaging portion on the outer peripheral face of the hood and preventing the elastic engaging portion from deforming by external force.

Abstract: A low inserting force terminal is provided. An elastic contact arm for a male terminal is formed inside the electrical contact unit, and the free edge portion of the elastic contact portion is slidable along the inner wall of the electrical contact unit. An inclined surface which is inclined in the sliding direction of the free edge portion is formed on the inner wall. The free edge portion is situated at the front edge of the inclined surface when the male terminal is in a non-inserted state. A contact surface for preventing excessive displacement of the elastic contact arm is formed at the rear edge of the inclined surface.

Abstract: An half-fitting prevention connector includes a pair of female and male connectors to be fitted and connected to each other, an elastic member disposed in a housing of one of said female and male connectors, a repulsion force of said elastic member preventing said female and male connectors from half-fitting to each other, a lock member disposed in said housing so as to be slidable in a direction of mutual fitting of said female and male connectors for locking the other one of said female and male connector in said housing on the basis of function of said elastic member; and a support mechanism for supporting said lock member so that said lock member is slidable in said housing.

Abstract: A lever-type connector is provided. A connector housing is provided with support axes. A stopper is formed on the tip of each support axis. Axis holes 4 for receiving the support axes are formed on a lever for connector engagement. The lever is rotatably supported by the connector housing. A stopper is formed by bending and protruding the tip portion of each support axis in one direction. The stopper is bent or protrudes in a direction opposite to the moving direction of the lever. A guide surface for each axis hole is formed on the opposite side of the bent or protruding portion of each stopper. Thus, the support axes of the connector housing and the axis holes of the connector engaging lever can be simplified.

Abstract: A method of adjusting pre-arcing time-current characteristic for a fuse is performed in a manner that a fusible portion I serving in a dead short-circuit area and a fusible portion II serving in a rare short-circuit area are coupled in series to form a fuse element, and entire pre-arcing time-current characteristic for the fuse is adjusted by combining pre-arcing time-current characteristic of the respective fusible portions I and II. A fuse structure is formed by a fusible portion I serving in a dead short-circuit, and a fusible portion II serving in a rare short-circuit area coupled in series with the fusible portion I serving in a dead short-circuit area. The fusible portion II serving in a rare short-circuit area is formed by material which is different in conductivity and melting point from those of material forming the fusible portion I serving in a dead short-circuit area.

Abstract: A fuse comprising: a fusible portion constituted by a connection portion which is formed of the same metal base material as a pair of terminals so as to connect the pain of terminals to each other, and a low-melting metal having a melting point lower than that of the connection portion and stacked by welding on at least a portion of the connection portion; and at least one protrusion formed on the fusible portion by making the connection portion and the low-melting metal project in a direction parallel to the plane of an interface between the connection portion and the low-melting metal. Further disclosed is a method of manufacturing the fuse. The fuse can be manufactured with a simple manufacturing process in comparison with a conventional method, and in the fuse, only the fusing-off time in a layer short-circuit range can be shortened by use of diffusion between the low-melting metal and base material.

Abstract: A fan speed controller of an automotive vehicle air conditioning device is usually placed in an air flow duct to be effectively cooled. Thus, compact construction of the speed controller is needed to obtain a larger air flow in the air flow duct. For this purpose, various compact resistor units for the speed controller have been proposed. However, some of them are poor in durability against shocks. In view of this, a compact resistor unit for a speed controller includes a resistor block that has a flat resistor, a flat insulating plate and a flat radiation plate which are respectively positioned against one another. The compact resistor unit further includes a holder block of molded plastic on which the resistor block is mounted. The compact resistor unit also includes a plurality of metal terminals partially embedded in the holder block, where the terminals are connected to particular portions of the flat resistor.

Abstract: In a connector locking structure, a locking protrusion 1b is formed on the upper surface of a flexible locking arm 1 of a male connector, and insufficient engagement preventing protrusions 1c are extended from both sides of the locking protrusion, the housing 2 of a female connector has a cut 8, into which the flexible locking arm is inserted, displacement preventing stoppers 8a are provided which are confronted with the cut 8 to support the insufficient engagement preventing protrusion, and in the housing 2, a locking confirming slider 3 having an engaging portion 3b which is to be engaged with the locking protrusion 1b is provided in such a manner that the locking confirming slider 3 is movable back and forth, being kept urged forwardly by springs 4.

Abstract: A shield plate for preventing the leakage of a magnetic flux and for reducing acoustic/electromagnetic noise leaking out from the interior of the motor is arranged so as to cover the corresponding end surface of an armature. The inner diameter of the shield plate is made smaller than the outer diameter of a rotor in order to prevent the rotor from being detached from a stator assembly.

Abstract: There is provided a fusing portion constituted by a high-melting point fusible metal element for coupling a pair of box-type terminals in the form of a link, and a low-melting point fusible metal element disposed at a substantially center portion of the high-melting point fusible metal element and containing a reducing element.

Abstract: A female terminal which enables a tab of a male terminal to be fitted into a female terminal even if the tab is bent when a connector housing receiving the male terminal is fitted relative to a connector housing receiving the female terminal. An elastic engagement arm is provided within a terminal receiving chamber in a connector housing. A female terminal includes a fitting portion for receiving a male terminal, an engagement portion for being retained by the engagement arm, and a wire connection portion. A guide projection is formed on the fitting portion of the female terminal, the guide projection projecting forwardly beyond the front end surface of the female terminal. There is provided a slanting guide surface extending from the guide projection 18 to an inlet of the fitting portion. A groove for allowing the passage of the guide projection therethrough is formed in the engagement arm.

Abstract: A female terminal comprises a square cylindrical electric contact portion having an opening into which a male terminal is inserted, an elastic contact piece housed in the electric contact portion and brought into elastic contact with the inserted male terminal, the elastic contact piece being formed with two side lug portions, and at least one supporting portion formed on at least one of side walls of the electric contact portion for supporting at least one of the lug portions formed in the elastic contact piece. In order to prevent the elastic contact piece from being dislocated from the supporting portion without increasing the external size of the female terminal, the supporting portion is elastically bent around a vertical axis, or around both horizontal and vertical axes, inwardly over the side wall of the electric contact portion.

Abstract: Disclosed is an ultra multiple connector for use in connecting of a wire harness, etc., having a frame for mounting a plurality of connectors and adapted to connect the frame to a mating connector, the ultra multiple connector being capable of securing mounting of connector housing onto the frame and mounting of rear holder onto the housing. A plurality of hollows each opened upwardly and downwardly are formed on the frame, and one or more connector housing connected to a wire harness is loaded into each of the hollows. The depth of the hollow of the frame is shorter than the length of the connector housing so that a portion of the connector housing in its mounted state is exposed from the frame, and an engaging aperture is formed on a side surface of the portion of the connector housing to be exposed. A rear holder is removably mounted on an end surface of the housing and an engaging click for engaging the engaging aperture of the connector housing is formed on the rear holder.

Abstract: A protective cover is mounted on a connector in which a plurality of terminals are received within a housing. The housing has a hood section having an opening, and electrical contact portions of the terminals are arranged in a predetermined arrangement within the hood section. The protective cover includes a cover body fitted in the opening in the hood section. The protective cover has an arrangement confirming portion for confirming whether or not the electrical contact portions are properly arranged. The arrangement confirming portion is formed so as to correspond to the arrangement of the electrical contact portions.

Abstract: To provide a multi-pole connector in which projected male connectors are protected from interference from the outside, and a smooth fitting of the connectors can be achieved. In the multi-pole connector, male connectors are mounted on one frame in such a manner that the male connectors are projected from the frame, and female connectors for the male connectors are mounted on the other frame. Connector-protecting ribs are formed at a peripheral portion of the one frame, and are projected to a height equal to or higher than a height of distal ends of the male connectors, and rib reception guides for the ribs are formed on the other frame.