摘要:
A dustproof structure for a sleeve bearing includes an axial tube, a sleeve bearing and a dustproof cushion. The axial tube accommodates the sleeve bearing which bears an axial hole through which a shaft of a motor rotor is freely extended. The dustproof cushion is attached to an end surface of the sleeve bearing to prevent from entering foreign dust. At least one oil-returning groove is formed between the sleeve bearing and the dustproof cushion to ensure cycling lubricant so that sufficient lubricity between the sleeve bearing and the shaft is ensured.
摘要:
A brushless dc motor includes a fan motor drive circuit, an over-current-detecting/current-limiting circuit and a multi-functional speed control circuit. The fan motor drive circuit is connected to the over-current-detecting/current-limiting circuit which is further connected to the multi-functional speed control circuit. The over-current-detecting/current-limiting circuit is adapted to detect a rotational speed and an over-current. Detecting an over-current, the over-current-detecting/current-limiting circuit controls a current at a low voltage level for passing through the fan motor drive circuit and inadequate to destroy it. The multi-functional speed control circuit sends a predetermined speed signal to control the over-current-detecting/current-limiting circuit for carrying out speed control of the brushless dc motor.
摘要:
A heat-dissipating fan includes a casing having an air outlet, a base mounted in the air outlet, and a plurality of guiding plates in the air outlet. An impeller is mounted on the base that is supported in the air outlet by the guiding plates. The guiding plates are parallel to one another and extend in a direction having an inclining angle with respect to an axial direction of the air outlet. The guiding plates guide airflow and increase wind pressure when the impeller turns.
摘要:
A device includes a casing having a plurality of equispaced openings formed around, and a plurality of spring-loaded radial tongues partially extended out from and retractable into the openings. Each of the radial tongues has a lower curved surface with a constant curvature in any imaginary contour line throughout at least one area of the lower curved surface. Furthermore, the constant curvature is exactly the same as the curvature of the rounded inner edge of the optical disk to be held.
摘要:
A casing for a heat-dissipating fan includes an annular wall and a base. The annular wall includes an air inlet in a first end thereof and an air outlet in a second end thereof. The base is securely mounted in the air inlet of the base, with a plurality of ribs extending between the annular wall and the base. A plurality of mounting portions are provided between the annular wall and the base to allow the heat-dissipating fan to be fixed to an object. Since the mounting portions are located inside the annular wall, minimization of the casing is realized.
摘要:
A motor includes a base, a stator mounted on the base, a rotor having a bottom end face, a metal ring mounted to the bottom end face of the rotor, and a balancing magnetic ring. The stator creates alternating magnetic fields when energized. A ring magnet is securely mounted to the rotor. The alternating magnetic fields drive the ring magnet and the rotor to turn. The balancing magnetic ring is mounted on the base and faces the metal ring. The balancing magnetic ring continuously attracts the metal ring when the rotor turns, thereby maintaining rotational balance of the rotor.
摘要:
A disc carrier for an optical disc drive includes a recession integrally formed thereon and an axial tube projecting from a central portion of a bottom wall of the recession. A shaft extends through the axial tube. An engaging length between the axial tube and the shaft is increased to improve rotating stability of the disc carrier. A support member is fixed in the recession and includes a peripheral support edge along a periphery thereof. The support member is in contact with and thus supports plural clamping members of a clamping device.
摘要:
An axial tube assembly of a motor includes an axial tube around which a stator assembly is mounted, an engaging member, and a sleeve in which a bearing is mounted. The engaging member includes a base and a plurality of resilient legs projecting from the base. Each resilient leg has a hook on a distal end thereof. The base of the engaging member is engaged with and thus seals a bottom end of an axial hole of the axial tube. The sleeve is mounted in the engaging member and has a base portion. The hook of each resilient leg is pressed outward to thereby retain the stator assembly in place when the sleeve and the engaging member are received in the axial tube, with the resilient legs of the engaging member together holding the sleeve to thereby allow tight engagement between the sleeve and the bearing.
摘要:
A heat sink device having light-emitting components comprises a heat sink, a fan and a plurality of light-emitting components. The heat sink is made of heat conductive material. The fan is received in a recession of the heat sink. The light-emitting components are symmetrically arranged in equi-spaced manner around the recession of the heat sink. Thus, when the fan is rotated, the light-emitting components can emit light performing various colors, flash frequency, reflection and refraction.
摘要:
An optical disk drive motor includes a stator and a main board. At least one adjusting member is provided between the stator and the main board. The adjusting member is adjustable to adjust a pressing force exerted on one of the stator and the main board, thereby keeping the stator and the main board in a parallel relationship.