摘要:
A fixing device includes a stationary frame and a number of elongated resilient tabs. The stationary frame defines a central axis and includes four sidewalls for receiving a number of magnets. Each sidewall includes a receiving hole and at least one protrusion formed on each sidewall at a lower portion thereof. A slot is defined in each protrusion. The tabs correspond to the magnets. Each tab includes an engagement portion, an angled portion, and a contact portion. The angled portion is interconnected between the engagement portion and the contact portion. The engagement portions engage in the respective slots. The contact portions resiliently abut against the corresponding magnets. Each tab is configured to apply a force on the corresponding magnet in a direction toward the central axis.
摘要:
A voice coil motor includes a stationary member, a moveable member, a base, and two guide posts. The stationary member includes a stationary frame and a number of magnets fixed on the stationary frame. The stationary frame defines a first receiving room. The moveable member is received in the first receiving room and includes a barrel holder and a coil. The barrel holder defines a second receiving room for receiving a lens barrel. The coil wraps around the barrel holder. Two through holes extend from a top surface to a bottom surface of the barrel holder. The base supports the stationary member and the moveable member. The guide posts are perpendicularly fixed on the base and pass through the through holes of the moveable member.
摘要:
First and second projections are formed to protrude toward a guide rail from both sides of a slide table. Third and fourth projections are formed to protrude toward the slide table from both sides of the guide rail. A plurality of balls are arranged in clearances between the first and second projections and the third and fourth projections.
摘要:
A lens actuator includes a box-shaped housing, a prism-shaped carrier, magnets, and coils. The housing accommodates the carrier to be movable along a first direction therein, and the carrier includes a hollow space where a lens can be mounted. The magnets are disposed at one of the carrier or the housing. The coils are disposed at one of the housing or the carrier such that the coils confront the magnets. When the magnets are disposed at the carrier, the coils are disposed at the housing, and when the magnets are disposed at the housing, the coils are disposed at the carrier. The carrier includes first flat guide section formed on a corner of the outer wall, and the housing includes second flat guide section formed on a corner of the inner wall, and the first guide section confront to and slide along the second guide section.
摘要:
The present invention is directed to an inductively driven electromagnetic linear actuator arrangement employing eddy currents induced by a fixed drive coil to drive its armature. Eddy current focusing fields are employed to direct the eddy currents using Lorentz forces to maximize armature speed. The armature includes a shorted driven coil in a DC magnetic field. This can be supplied by a permanent magnet. When current is applied, a force is felt by the coil in a direction perpendicular to the magnetic field. Such an actuator is well suited for electrical switching applications including transfer switching applications, circuit breaker applications, and ground fault interrupter applications.
摘要:
A lens drive device may include a support body, a movable body having a lens, a magnetic drive mechanism having a coil mounted on the movable body and a magnet mounted on the support body for magnetically driving the movable body in a lens optical axis direction, two spring pieces which are connected between the movable body and the support body for supporting the movable body and which is used as a power supply member to the coil, and two binding pins which are provided in the movable body and around which coil ends of winding start and winding end of the coil are wound. Portions of the coil ends which are wound around the binding pins are electrically connected with the spring pieces.
摘要:
A reciprocating linear actuator in which a slide and a counter slide are arranged for linear movement within a hollow guide. The actuator has driving force generating means for generating a driving force between the slide and the counter slide and also has bearing structures formed individually between the guide and the slide and between the guide and the counter slide. If an external force acts on the slide, the external force is transmitted from the slide to the guide through the bearing structure between them.
摘要:
An objective lens actuator comprises a lens holder for attaching an objective lens thereon, a piece of focusing coil, being wound along side surface of the lens holder around the objective lens, and three magnets, being disposed opposing to two surfaces each having a normal line perpendicular to both a focusing direction and a tracking direction, among four side surfaces of the lens holder, wherein the three magnets are aligned, continuously, along the tracking direction, differing a polarity thereof from one another, and width of the magnets on both outsides is wider than width of the magnet inside, or alternately, one magnet, being disposed opposing to two surfaces each having a normal line perpendicular to both a focusing direction and a tracking direction, among four side surfaces of the lens holder, wherein the magnet is magnetized into three poles along the tracking direction, and among the three poles, width of the poles on both outsides is wider than width of the pole inside.
摘要:
A linear stepper motor is used for the displacement of an armature parallel to a stator having N steps. The stator includes (N+2) stator pole pieces which are enclosed by a magnetic guiding element and are each approximately the same distance from neighboring stator pole pieces. Furthermore, at least one coil is located between two stator pole pieces. The armature is enclosed by the stator in the radial direction and has a permanent magnet magnetized parallel to the stator which is disposed between two armature pole pieces. As a result of the reluctance forces, the armature occupies stable idle positions inside the stator in which the stator pole pieces lie opposite the armature pole pieces. By energizing the coils with a short current pulse, the armature can be displaced inside the stator between the different stable idle positions.
摘要:
An exemplary image stabilizer includes an outer housing, an inner housing, an upper cover and a driving assembly. The inner housing is moveably received in the outer housing. The upper cover is fixedly mounted on the inner housing and moveably supported by the outer housing. The driving assembly includes a first magnetic member and a second magnetic member. The first magnetic member is positioned on the inner housing. The second magnetic member is positioned on the outer housing. The driving assembly is configured for driving the inner housing and the upper cover to move relative to the outer housing in a plane substantially perpendicular to a central axis of the outer housing through interaction between the first magnetic member and the second magnetic member.