摘要:
A loudspeaker with low-frequency oscillation, comprising: a housing (21) with a ring portion (211) extending inwardly from the bottom thereof; and a reed element (22) having a top end attached to an oscillatable sound assembly, the reed element (22) further having an external ring (221) and two vibration arms (222) symmetrically extending from the internal side of the external ring (221) to the internal side of the loudspeaker in a bent manner, each of the vibration arms (222) having a free end (223) extending to the center of the reed element (22), the oscillatable sound assembly including either a magnetic ring (25) or a coil (28) disposed within the housing (21), the ring portion (211) being attached to either another coil corresponding to the magnetic ring (25) or another magnetic ring corresponding to the coil (28), whereby, when the coil (28) is fed with electric current, a magnetic force is created to impart an up and down vibration to the oscillatable sound assembly, thereby enhancing the effect of the low-frequency sound field as well as the resonance effect.
摘要:
An amount of movement of an air passing through a clearance G2 is adjusted by adjusting the clearance G2 by placing an outer shape surface 35 of a yoke 3 in proximity of an inner side surface of a housing 1. Accordingly, a vibration characteristic having a wide frequency bandwidth can be obtained, thereby improving stability and convenience of body-sensible vibration characteristic of a multifunctional vibration actuator.
摘要:
An improved electromagnetic actuator which is provided with a coil (10) for impressing current, a magnet (20) which forms a magnetic circuit while keeping a magnetic gap (G) against a magnetic yoke (21), a diaphragm (11) which oscillates when a high-frequency current is impressed, and another diaphragm (22) which oscillates when a low-frequency current is impressed and wherein each section is housed in an enclosure (3) with the coil (10) being arranged in the magnetic gap (G). In one of the embodiments, a bottom plate composed of radially oriented magnets, diaphragms with a double-suspended structure, and a magnetic shield member is attached to the enclosure so as to suppress the leakage of magnetic fluxes from the enclosure and elastic packings (5 and 7) are put not only between the enclosure of the actuator and the housing case of portable electronic equipment, but also between the enclosure of the actuator and a mounting substrate so as to further improve the frequency characteristics of the actuator from the side of the mounting structure of the actuator.
摘要:
In a vibration actuator having a magnetic circuit component (10) and a coil (17) arranged in a gap (14) which is made at one side of the magnetic circuit in a predetermined direction, a space defining member (31,32,19) defines an accommodation space (34) to accommodate the magnetic circuit component and the coil. A supporting unit (16,18) supports the magnetic circuit component and the coil so that they are separately movable in the predetermined direction. The space defining member has a sound release hole (33) faced to the other side of the magnetic circuit component in the predetermined direction.
摘要:
The present invention relates to an electric-mechanical-acoustic converter used mainly in a mobile telephone and the like, and its objective is to provide a high-quality product in which damage and degradation of performance caused by shock due to a drop are prevented. In order to achieve this objective, the present invention includes at least one suspension (14) supporting a movable portion (19) formed of the magnetic circuit portion (17) and a weight portion (13) , and a frame (9) supporting a diaphragm (8) and the suspension (14) , a space in an elastic deformation range of the suspension (14) being provided between the outer periphery of the movable portion (19) and the frame (9) . Even in the case where a portable terminal apparatus is dropped, and the electric-mechanical-acoustic converter built therein is subjected to shock, the outer periphery of the movable portion (19) is received by the frame (9) , whereby the suspension (14) can be prevented from being permanently deformed.
摘要:
The present invention provides for a surface acoustic transducer optimally structured to produce sound within an aircraft cabin by vibrating the interior cabin walls. Specifically, the surface acoustic transducer comprises a primary assembly comprising a voice coil assembly having a voice coil former and wire, and a transducer housing for retaining said primary assembly and a magnet therein such in movable relations. The present surface acoustic transducer may further include a spider structured to provide an improved excursion. An external housing may additionally be provided comprising a rigid retaining wall for protecting the surface acoustic transducer from potential externally applied forces and a malleable excursion cover allowing for an excursion of the primary assembly thereof.