A linear vibration motor is provided that includes a housing, a vibrator, and a coil. The vibrator includes a weight portion and a first magnet, and the vibrator is accommodated inside the housing. The weight portion includes a multilayer body in which multiple sheets including metal sheets are laminated in a thickness direction. The multilayer body has a first principal surface and a second principal surface opposite to the first principal surface, and a first accommodation section is formed in the multilayer body so as to open at the first principal surface and at the second principal surface. The first magnet is fixed in the first accommodation section and the coil is fixed to the housing so as to oppose the first magnet. In addition, an electronic device is provided that uses the linear vibration motor. A vibrator and a method of manufacturing the vibrator is also provided.

An electronic device includes a housing having a plurality of surfaces and a plurality of vibration portions provided in the housing so as to be in contact with at least one of the plurality of surfaces. The plurality of vibration portions include a first vibration portion, which vibrates at a frequency included in a first frequency band, and a second vibration portion, which vibrates at a frequency included in a second frequency band that is different from the first frequency band.

A linear actuator may include a movable element including a cylindrical permanent magnet; a stationary element including a coil bobbin that surrounds the permanent magnet at an outside in a radial direction; a spring member connected to the movable element and the coil bobbin, and supporting the movable element to be movable in an axial direction in relation to the coil bobbin; a coil wound around the coil bobbin, for configuring a magnetic drive mechanism together with the permanent magnet, the magnetic drive mechanism being structured to drive the movable element in the axial direction; and a gel damper member being sandwiched between the stationary element and the movable element in the axial direction.

The present invention guides the linear vibrations of a needle, obtains stable vibrations and exhibits excellent impact strength, and makes thinness or widthwise compactness possible. A linear vibration motor equipped with: a needle equipped with a magnet and a spindle part; a frame for slidably supporting the needle in one axial direction; a coil for driving the magnet in the one axial direction, and affixed to the frame; and an elastic member for imparting an elastic force to the needle in opposition to the driving force imparted on the magnet. Furthermore, a guide groove extending in the one axial direction is provided in the needle or the frame, and a rolling body for rolling and being guided by the guide groove is provided in the other of the needle and the frame.

The present disclosure provides a linear vibration motor. The linear vibration motor comprises a shell having a housing space, a vibration unit housed in the housing space, an elastic member suspending the vibration unit in the housing space, and a driving unit driving the vibration unit to vibrate. The vibration unit comprises a housing portion recessed inwardly on two sides perpendicular to the vibration direction. The housing portion includes respective inner walls constituting the housing portion. The linear vibration motor further includes a blocking piece housing in the housing portion and fixedly connected to the inner wall, and a foamed cotton fixedly connected to the blocking piece and at least partially received in the housing portion, the blocking piece carrying and supporting the foamed cotton, and the blocking piece cooperating with the foamed cotton to limit the displacement of the vibration unit in the vibration direction.

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 device and method for the non-invasive measurement of state of tension, biomechanical and viscoelastic properties of surfaces of soft biological tissues includes electronic, digital and mechanical elements and sensors, and a testing end. The elements within the housing can subject the testing end to a mechanical impulse force, and can sense the movement of the testing end. The testing end has a contact surface which can be adhered to the surface of the soft biological tissue, and subjected to a mechanical force in a direction parallel to the surface.

A device and method for the non-invasive measurement of state of tension, biomechanical and viscoelastic properties of surfaces of soft biological tissues includes electronic, digital and mechanical elements and sensors, and a testing end. The elements within the housing can subject the testing end to a mechanical impulse force, and can sense the movement of the testing end. The testing end has a contact surface which can be adhered to the surface of the soft biological tissue, and subjected to a mechanical force in a direction parallel to the surface.

The invention relates to the field of transducers, in particular linear vibration generators. It concerns a vibration generator, devices comprising such a vibration generator and a related treatment method.

A vibration generator comprising a mass, a coil, a permanent magnet and a housing, wherein the mass can be set in an oscillatory motion with respect to the housing by applying a current to the coil, and the vibration generator further comprising an axle, wherein the oscillatory motion is along the axle, and in that the mass comprises the permanent magnet and the coil is fixed to the housing.

A linear vibration motor is provided that includes a housing, a vibrator, a first shaft, and a second shaft. The vibrator vibrates along a first direction, and has a first through-hole and a space extending along the first direction. The first shaft and the second shaft, which are guides, are disposed along a second direction and are fixed to the housing so as to support the vibrator slidably along the first direction. In the linear vibration motor, the first shaft is fitted together by insertion into the first through-hole, and the second shaft is inserted into the space. The second shaft and part of a wall determining the space are in contact with each other in a third direction.