A vibrating actuator is disclosed, comprising: a magnet arrangement including at least one magnet (1); a hollow member (4) comprising at least one coil member (2) with a coil transversally surrounding a cavity (5) forming a longitudinal passageway for receiving the magnet arrangement and permitting a longitudinal relative movement between the hollow member (4) and the magnet arrangement; and elastic means (6) interconnecting the magnet arrangement and the hollow member (4). In one aspect, the elastic means (6) are thin membranes having an oblong shape with transversal indentations (10) on their opposite long sides. In another aspect, at least two magnets (1) are arranged with same polarities facing each other inside a magnet frame (8) at least partially surrounding the magnets (1). Furthermore, methods for assembling the magnet arrangement of a vibrating actuator, the hollow member of a vibrating actuator, and the overall vibrating actuator are disclosed.

The present disclosure provides a linear motor having a housing with an accommodation space; a vibrator accommodated in the accommodation space; and a first stator locating opposite to the vibrator and fixed to the housing. The first stator includes a first circuit board opposite to the vibrator, a first coil on a the side of the first circuit board close to the vibrator, and a first magnetic conductive sheet locating on a side of the first circuit board away from the vibrator. The linear motor further has a spring bracket supporting the vibrator in the accommodation space. The present invention is to provide a linear motor which improves the space utilization of the linear motor in a thickness direction.

A mounting substrate includes a resin layer and a first conductor including a contact surface in contact with the resin layer. The first conductor includes a first surface facing toward the mounting surface and a second surface on a side opposite to the first surface and extends in a direction parallel or substantially parallel to the mounting surface. The first conductor has a difference of a maximum value and a minimum value of a distance between the first surface and the mounting surface smaller than a difference of a maximum value and a minimum value of a distance between the second surface and the mounting surface. The resin layer includes a resin wall portion surrounding an opening portion partially exposing the first conductor on the mounting surface side, and the first conductor includes an exposed portion defining a mounting electrode.

A haptic actuator includes mechanical links defining a first J-trajectory and mechanical links defining a second J-trajectory as well as a motor coupled to the mechanical links so as to synchronously accelerate a first mass over the first J-trajectory and a second mass over the second J-trajectory. During a first time interval, reactive forces of the first mass accelerating substantially balance reactive forces of the second mass accelerating and during a second time interval reactive forces of the first mass accelerating do not substantially balance reactive forces of the second mass accelerating. This un-balanced condition results in a tap signal being produced.

A mechanical vibration source for a shear wave elastography system has a contact surface shaped to provide a point source of mechanical energy when striking a target surface of a medium. This point source usefully mitigates high frequency components and other artifacts in an induced shear wave. Other techniques may be used in combination with this mechanical energy source to improve shear wave elastography and facilitate miniaturization for deployment, e.g., within a handheld imaging device.

A linear actuator, comprising: a base; a fixed part support mechanism attached to the base; a fixed part elastically supported by the fixed part support mechanism; and a movable part driven to reciprocate in a predetermined drive direction with respect to the fixed part, wherein the fixed part support mechanism comprises: a movable block attached to the fixed part; a linear guide that couples the movable block with the base to be slidable in the predetermined drive direction; and an elastic member that is disposed between the base and the movable block and prevents transmission of a high frequency component of vibration in the predetermined drive direction.

A linear vibration motor, comprising a stator assembly and a vibrator assembly. The stator assembly comprises a housing (1) having a receiving cavity, a magnet (2) located in the receiving cavity and jointly fixed to the housing (1), and a central magnetic yoke (3) of which at least one end is jointly fixed to the housing (1). The magnet (2) comprises a hollow portion (21) extending along the vibration direction of the vibrator assembly. The vibrator assembly comprises a coil (4) and a mass block (9). When the vibrator assembly vibrates, the coil (4) vibrates along with the vibrator assembly and is inserted into the hollow portion (21) of the magnet (2). The central magnetic yoke (3) runs through the coil (4). An resilient support member (5) is configured to suspend the vibrator assembly in the receiving cavity of the housing (1). According to the linear vibration motor, the magnetism of the magnet can be utilized to the greatest extent, thereby improving the efficiency of utilizing the magnetic line of force of the magnet by the coil, the central magnetic yoke functions as a guide shaft, thereby ensuring the vibration coaxiality of the vibrator assembly.

A vibration generation device includes: a base configured to transmit vibration to an object; a pendulum supported by the base swingably around a rotation axis; and a driving unit including a magnet, and a coil disposed to face the magnet in a non-contact manner, and configured to swing the pendulum. One member of the magnet and the coil is provided at a position on the pendulum away from the rotation axis. The base includes a support portion supporting the pendulum swingably around the rotation axis. A part of an extension surface of a facing surface of the support portion facing the pendulum is included in a swingable range of the pendulum. The support portion is provided outside the swingable range of the pendulum when viewed along the rotation axis.

An actuator according to various embodiments of the present invention comprises: a stator including a bracket, a yoke located on the bracket, and a coil for encompassing the circumference of the yoke; a permanent magnet encompassing the circumference of the coil; a vibrator including a weight encompassing the circumference of the permanent magnet, and a plate for supporting the permanent magnet and the weight; an elastic member located between the bracket and the vibrator so as to support the vibrator; and a magnetic fluid which is located between the vibrator and the stator, and which provides damping stability when the vibrator vibrates, wherein the weight of the magnetic fluid can be between 0.24% to 0.71% on the basis of the weight of the vibrator. Other various embodiments are possible.

A holder is used while attached to a chassis of a vibration generator that moves a vibrator to generate a vibration. The holder includes a vibrator retention unit retaining the vibrator, a fixed unit fixed to the chassis, and an arm. The arm connects the fixed unit and the vibrator retention unit, and the arm supports the vibrator retention unit while the vibrator retention unit can be displaced with respect to the fixed unit. The fixed unit, the arm, and the vibrator retention unit are integrally formed using resin.