Matsushita Electric Industrial Co., Ltd.

Matsushita Electric Industrial

Minebea Motor Manufacturing Corporation

Minebea-matsushita Motor

Toshiaki Tsuzaki

Eiichi Ibata

Kodo Fukuoka

Mikio Umehara

Kazuaki Sato

Koji Kuyama

Shigeru Yoshida

Masaaki Matsubara

Kouji Kuyama

Hideki Shimada

Masaki Matsubara

Hideo Kobayashi

Osamu Furuta

Chee Poh Chua

Noriyoshi Naito

A method for controlling stopping of a vibration generating stepping motor is a method for controlling the stopping of an vibration generating stepping motor by a control unit, characterized in that the method includes: stopping a supply of a driving pulse to the vibration generating stepping motor while applying a driving voltage to the vibration generating stepping motor; applying the driving voltage to the stepping motor, which does not completely stop, for an optimum braking time according to a motor configuration of the stepping motor, so as to brake the stepping motor; and stopping the applying of the driving voltage to the stepping motor which is rotating under inertia after the elapse of the optimum braking time.

Method and apparatus for controlling stopping of vibration generating stepping motor

A stepping motor for generating vibration is provided and includes a stator and a rotor. The rotor includes a shaft, a ring magnet and a rotor frame, and the rotor frame is formed into a substantial cup-shape including a disk portion having an opening at the center and also including a cylindrical portion continuously arranged at the periphery of the disk portion, and a weight portion is arranged in a portion of the rotor frame so that the gravity center of the rotor frame an be located at a position eccentric with respect to the center of the rotor frame.

Stepping motor for generating vibration

A motor includes (a) a cylindrical frame made of ferromagnetic material, (b) a pipe fitted in and disposed within the frame concentrically, (c) a sintered bearing press-fitted into the pipe, (d) a cylindrical magnet fixed on an outer wall of the pipe at an inner wall of the magnet, and (e) a cylindrical coil facing the magnet via an annular space, where the frame and the pipe are welded at a fitted section therebetween. This structure allows the motor to withstand a strong enough shock. An apparatus requiring a vibration motor can employ this motor having a large vibrator, so that great vibrations are available for the apparatus. As a result, the apparatus&mdash;utilizing the great vibrations as various functions&mdash;is obtainable.

Micro-motor and apparatus using the same motor

A slim motor good for a portable device includes a frame, pipe, magnet, coil, shaft, first bearing and a second bearing (inside bearing). The pipe is disposed on an inner wall of the cylindrical magnet, and an outer diameter of the second bearing is set at approx. the same as that of the pipe. The second bearing is aligned to the pipe in an axial direction and fixed on the inner wall of the magnet. This structure allows the magnet to extend axially long enough, and solves conventional problems including power consumption, slant of the shaft, motor efficiency, productivity and the like, thereby contributing to achieving a slimmer motor and a slimmed-down device.

Slim motor and devices mounting the same motor

A motor includes a stator and a rotor facing the stator. The rotor has a magnet and an eccentric weight. The magnet is magnetized in a rotational direction and produces driving magnetic field. The eccentric weight is made of the material having a greater specific gravity than the magnet. The magnet shapes in a cylinder and a part of the cylinder is cut away to form a space. The eccentric weight is placed in the space. A rotational area of the magnet and that of the eccentric weight overlap each other. In this structure, rotation of the rotor spins the eccentric weight, thereby producing large vibrations. The eccentric weight is accommodated by a motor housing for the safety. The thin and compact motor is thus obtainable.

Vibration motor having an eccentric weight and device including the same motor

An electromagnetic vibrator includes a vibration generating mechanism; a case for containing at least part of the vibration generating mechanism; a power supply terminal for supplying power to the vibration generating mechanism, protruding from the case; an elastic body covering at least part of the case; and an elastic pressing body deformable under pressure, formed in part of the elastic body. When the electromagnetic vibrator is incorporated into a device, part of the device presses the case. Correspondingly, the elastic pressing body presses the power supply terminal toward a power supply land disposed on the device side, and the power supply terminal contacts the power supply land thereby electrically connecting itself to the power supply land. With this construction is provided a highly reliable electromagnetic vibrator and device incorporating the electromagnetic vibrator with electric connections having high vibration resistance and impact resistance.

Electromagnetic vibrator and device incorporating the same

A slender-type cylindrical coreless motor for use in battery driven equipment in which power-consumption is low, high reliability is achieved, miniaturization and long-term battery driving of the equipment are realized. The slender-type cylindrical coreless motor includes: a pipe (2) with one end fixed to a frame (1); a cylindrical magnet (3) disposed around the outer surface of the pipe (2); and an inner bearing (7) for holding a fixed portion of a shaft (5) to a rotor assembly body (4). A second end portion of the pipe (2) has a length that does not permit protrusion thereof from an end surface (3b) of the magnet (3), and the inner bearing (7) is located at the end surface (3b) of the magnet (3) concentrically with the outer diameter of the magnet. Portions of the inner bearing (7) and the end surface facing each other are joined with solder material, and portions of the pipe (2) and the magnet (3) facing each other are joined with solder material.

Slender-type cylindrical coreless motor and battery driven equipment

In a motor mounting mechanism, a cylindrical motor includes a frame (6) serving as a stator and an electric power supply terminal (2) attached to a bottom surface of a bracket (1). When the motor is mounted to a motor attachment device, a first external electrode (10) is mechanically and electrically connected to a cylindrical side surface of the frame (6) while a second external electrode (11) is mechanically and electrically connected to the power supply terminal (2). The first and second external electrodes are both located outside the motor, and thus, the process of providing lead wires for connecting the external electrodes to the printed board can be omitted, allowing the total size of the motor mounting mechanism to be reduced.

Motor mounting mechanism for a cylindrical vibration motor

A miniature motor includes a frame which has been solder treated on its surface and which has a closed end and is generally cylindrical-shaped or generally oval-shaped in cross section. The frame includes a projected portion of an outer periphery thereof for insertion into a hole of a printed circuit board. The projecting portion has a notch for holding the printed circuit board therein, wherein the printed circuit board and the projected portion extending through the hole of the printed circuit board are soldered to each other with solder while the printed circuit board is held in the notch of the projected portion.

Miniature motor and method for fixing miniature motor to printed circuit

In a miniature electric motor a hollow cylindrical socket (2) is formed by deep drawing process on a roof plate of a frame (1), and in this socket (2) a bearing housing (4) is tightly fit projecting outwardly and inwardly from its roof plane, and at least one bearing metal (3) is further tightly fitted therein in a manner to project from both ends of the bearing housing (4). By utilizing the draw-worked socket (2) for tightly holding the bearing metal (3), the accuracy of axis or circularity of the bearing hole is assured.

Growing community of inventors

Yonago, Japan

Toshiaki Tsuzaki