Vertical linear vibration motor

Abstract

The invention relates to a vertical linear vibration motor comprising a vibration component, an excitation component and a casing which are buckled together; the casing is hollow and is in a cylindrical shape, and a space is arranged in the casing; the side wall of the casing is provided with a groove, and is provided with a closed upper surface and an open lower surface for covering the vibration component and the excitation component which is arranged below the vibration component; the vibration component comprises an elastic element, a magnet loop and a counterweight; the magnetic loop comprises a magnetic yoke, a magnet body which is fixed onto the inner surface of the magnetic yoke and produces vertical magnetism, and a polar plate which is fixed onto the lower surface of the magnet body; and the magnetic yoke is a hollow cylindrical body. According to the vertical linear vibration motor, the inner space of the motor is best utilized, a stable vibration waveform and a simplified motor structure are realized through the unique structural design of a sheet-type elastic element; and the motor has longer service life through the optimal design of the local stress of the sheet-type elastic element.

Description

technical field [0001] The invention relates to a motor, in particular to a vertical linear vibration motor. Specifically, the vertical linear vibration motor of the present invention generates A kind of forced vibration relative to the vertical direction of the bottom surface of the base; when the predetermined frequency of the electromagnetic field is equal to the natural frequency of the vibrating component, resonance occurs, and the vertical linear vibration motor of the present invention maximizes the use of the internal space of the motor to facilitate vibration Components can have sufficient weight and space to generate maximum vibration amplitude. [0002] More specifically, in the vertical linear vibration motor that does not use the traditional vibration motor mechanism based on the shafting structure and the brush commutator structure, the vertical linear vibration motor of the present invention, through the unique structural design of the sheet type elastic element...

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Problems solved by technology

[0027] However, the above-mentioned vertical linear vibration motor structure 35 has a large number of component parts, which will inevitably increase the material cost of the parts; The lower support element 508 is supported in the casing 503, this structure increases the difficulty of motor assembly, and reduces the stability of the motor structure when the motor generates a drop impact

[0028] In addition, the elastic element 509 of the above-mentioned vertical linear vibration motor structure 35 is a leaf spring, and a plurality of elastic arms are arranged in a circular array between the fixed ring and the fixed plate, and the elastic arms extend in a unidirectional arc. Due to the limitation of the space volume, The extension length of the elastic arm is limited to a certain extent, thereby affecting the elastic coefficient of the elastic element and the vibration amplitude of the vibrating body; when a large vibration amplitude is to be achieved, the elastic arm will have a large displacement, which will make the The local stress at the junction of the arm and the fixed ring or the fixed plate increases, which increases the fatigue of the elastic element during long-term operation, which will seriously reduce the life of the elastic element, cause the fracture of the elastic element, and shorten the life of the motor

[0029] At present, in the manufacture and assembly of vertical linear vibration motors, tooling is often used to determine the gap between the vibrating body and the casing. Due to the size of the parts and components themselves, coupled with the wear and tear of the tooling for a long time, it will cause assembly problems. The rear vibrating body is eccentric and the circumferential gap is uneven, which will cause the vibration coil to be worn and broken or the contact and collision noise with the side wall of the casing during the reciprocating vibration process

[0030] The deficiencies mentioned above will affect the overall quality of the vertical linear vibration motor; it will complicate the production process, reduce production efficiency, and the consistency of product assembly is poor

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