A low Z linear vibrator is described well suited for use in small form factor portable devices such as a smartphone. The low Z vibrator can be configured to include a beam structure that can be attached to a vibratory mass and a low profile actuator. The low profile actuator can cause the vibratory mass to oscillate in a well-defined and predictable manner.

Provided is a device for converting rotary motion into oscillatory axial motion, which device comprises: (a) a rotation element (1); (b) a base element (2); and (c) one or more bearings (3) for facilitating rotary motion of the rotation element relative to the base element;
wherein the rotation element and/or the base element comprise one or more raised portions (4) and/or one or more lowered portions (5) over which portions the one or more bearings (3) pass in order to periodically increase and decrease axial distance between the rotation element (1) and the base element (2) as rotation occurs, thereby imparting an oscillatory axial motion to the rotation element (1) relative to the base element (2).

Provided is a device for converting rotary motion into oscillatory axial motion, which device comprises: (a) a rotation element (1); (b) a base element (2); and (c) one or more bearings (3) for facilitating rotary motion of the rotation element relative to the base element;
wherein the rotation element and/or the base element comprise one or more raised portions (4) and/or one or more lowered portions (5) over which portions the one or more bearings (3) pass in order to periodically increase and decrease axial distance between the rotation element (1) and the base element (2) as rotation occurs, thereby imparting an oscillatory axial motion to the rotation element (1) relative to the base element (2).

The vibration producing device includes a driving shaft being placed under slight rapid vibratory movements in its axial direction, a slight rapid vibratory movements producing member coupled with one end of the driving shaft for causing the driving shaft to be vibrated with the slight rapid vibratory movements, a casing for supporting at least either the driving shaft or the slight rapid vibratory movement producing member in such a manner that the driving shaft can be vibrated with the slight rapid vibratory movements in its axial direction, and a weight member to be coupled with the driving shaft in order to permit the weight member to move in its axial direction under the slight rapid vibratory movements of the driving shaft, wherein the casing is vibrated by allowing the weight member to be moved forwards and backwards alternately along the driving shaft in its axial direction.

The vibration producing device includes a driving shaft being placed under slight rapid vibratory movements in its axial direction, a slight rapid vibratory movements producing member coupled with one end of the driving shaft for causing the driving shaft to be vibrated with the slight rapid vibratory movements, a casing for supporting at least either the driving shaft or the slight rapid vibratory movement producing member in such a manner that the driving shaft can be vibrated with the slight rapid vibratory movements in its axial direction, and a weight member to be coupled with the driving shaft in order to permit the weight member to move in its axial direction under the slight rapid vibratory movements of the driving shaft, wherein the casing is vibrated by allowing the weight member to be moved forwards and backwards alternately along the driving shaft in its axial direction.

A vibration exciter with load compensation for the dynamic excitation of test specimens includes a base, an actuator, an armature which can be moved by the actuator in an excitation direction relative to the base and guided by a linear guiding element parallel to the excitation direction, and a pneumatic load compensator which compensates for the gravity force of at least the armature and the test specimen being excited. A high-quality low-perturbation exciter signal is generated by minimizing friction and other nonlinearities occurring during the load compensation. The linear guiding element of the vibration exciter with load compensation includes an air bearing, and the load compensator includes the linear guiding element.

A vibration exciter with load compensation for the dynamic excitation of test specimens includes a base, an actuator, an armature which can be moved by the actuator in an excitation direction relative to the base and guided by a linear guiding element parallel to the excitation direction, and a pneumatic load compensator which compensates for the gravity force of at least the armature and the test specimen being excited. A high-quality low-perturbation exciter signal is generated by minimizing friction and other nonlinearities occurring during the load compensation. The linear guiding element of the vibration exciter with load compensation includes an air bearing, and the load compensator includes the linear guiding element.

A tip force monitoring and annunciation means which permits maintaining proper tip pressure during treatment of self-applied acoustic wave treatment for various parts of the user's body by an untrained user. The several embodiments of the disclosure employ designs, materials, and manufacturing methods which are inexpensive and consistent with current manufacturing practices. The functionality, size, cost, simplicity, ease of use, reliability and robustness of the proposed designs are all advantageous.

A repetitive moment generating device includes: eccentric weight members provided at shaft bodies in a state where the eccentric weight members intersect the rotatably held shaft bodies and in a state where the eccentric weight members are slidable in a direction that intersects the shaft bodies; sliders that are attached to the shaft bodies in a state where the sliders are slidable in a direction of shaft centers of the shaft bodies and in a state where the shaft bodies are able to idle; link mechanisms that convert sliding motion of the sliders in the directions of the shaft centers into sliding motion in a direction that intersects the shaft bodies and transmit the sliding motion to the eccentric weight members; handle that are operation means for causing the sliders to slide in the directions of the shaft centers of the shaft bodies; and the like.

A repetitive moment generating device includes: eccentric weight members provided at shaft bodies in a state where the eccentric weight members intersect the rotatably held shaft bodies and in a state where the eccentric weight members are slidable in a direction that intersects the shaft bodies; sliders that are attached to the shaft bodies in a state where the sliders are slidable in a direction of shaft centers of the shaft bodies and in a state where the shaft bodies are able to idle; link mechanisms that convert sliding motion of the sliders in the directions of the shaft centers into sliding motion in a direction that intersects the shaft bodies and transmit the sliding motion to the eccentric weight members; handle that are operation means for causing the sliders to slide in the directions of the shaft centers of the shaft bodies; and the like.