CN-122001170-A - Z-axis vibration motor

Abstract

The invention provides a Z-axis vibration motor, which comprises a rotor carrying seat and a stator part. The rotor carrier comprises a suspension spring plate and a coil set, and the stator part comprises a stator part body and a flexible circuit board. The suspension spring plate is long and arranged on two opposite sides of the rotor carrying seat, one end of the suspension spring plate is connected with the rotor carrying seat, the other opposite end is connected with the stator part, and the coil group is arranged on the rotor carrying seat and is provided with a coil and a magnetic conduction piece. The coil is wound around the vibration axis as a central axis, and the magnetic conductive member is positioned at the center of the coil. The stator part body is box-shaped and can accommodate the rotor carrying seat, the stator part and the rotor carrying seat are made of magnetic conduction materials, and the flexible circuit board is arranged on the stator part body and is electrically connected with the coil group for supplying driving voltage.

Inventors

• LIU JINSONG
• ZHANG QILIN
• JIAN XIAOMING

Assignees

• 台睿精工股份有限公司

Dates

Publication Date

20260508

Application Date

20241111

Priority Date

20241104

Claims (5)

1. 1. A Z-axis vibration motor, comprising: The rotor carrier is made of magnetic conductive material and comprises: a suspension spring piece in the shape of long piece and arranged on two opposite sides of the rotor carrier, one end of the suspension spring piece is connected with the rotor carrier, the other opposite end is connected with a stator part, and A coil set disposed on the rotor carrier and having a coil wound around a vibration axis and a magnetic conductive member disposed at the center of the range surrounded by the coil, and The opposite sides of the stator part are connected with the suspension spring plate, so that an air gap is formed between the stator part and the rotor carrier; the stator part comprises: A stator part body which is box-shaped and made of magnetic conductive material, and The flexible circuit board is arranged on the stator part body and is electrically connected with the coil set for supplying a driving voltage to the coil set; The driving voltage has a driving frequency which enables the coil set to form a vibrating magnetic field in the vibrating axial direction, and the intensity of the vibrating magnetic field is changed by the change of the driving voltage formed by the driving frequency, so that the magnetic attraction between the coil and the stator part is controlled and changed to generate vibration.
2. 2. The Z-axis vibration motor of claim 1, wherein the suspension spring has: a connecting part connected with one end of the rotor carrier; A free end which is the other end of the suspension spring plate opposite to the connecting part, and A bending part between the connecting part and the free end, and The bending part enables the suspension spring plate to form an upper spring plate and a lower spring plate, the upper spring plate is positioned between the connecting part and the bending part, the lower spring plate is positioned between the bending part and the free end, the lower spring plate is closer to the stator part body relative to the upper spring plate, and the free end and the connecting part are connected and fixed with each other; wherein the connecting parts of the pair of suspension spring plates are positioned in opposite directions of two opposite sides of the rotor carrying seat.
3. 3. The Z-axis vibration motor of claim 2, wherein the bending portion, the upper spring plate and the lower spring plate together form a fitting space, and a fixing block is disposed in the fitting space; After the fixing block is placed in the embedding space, the upper elastic sheet and the lower elastic sheet are welded and fixed with the fixing block respectively.
4. 4. A Z-axis vibration motor according to claim 3, wherein a side surface of the fixing block away from the mover mount is a fitting surface, the fitting surface is in contact with inner side wall surfaces of opposite sides of the stator portion body corresponding to the suspension spring, and the mover mount and the stator portion are fixedly connected by welding and assembling.
5. 5. The Z-axis vibration motor of claim 4, wherein the mover carriage and the suspension spring are integrally formed.

Description

Z-axis vibration motor Technical Field The invention relates to the field of vibration motors, in particular to a Z-axis vibration motor with a magnet-free structure. Background With the development of the touch device, the touch device gradually replaces the traditional key device on the portable device, so that the portable device can have larger space for placing the screen, and the screen occupation ratio is improved. However, after the key is completely replaced, the disadvantage of the ice-cold hard screen not giving tactile feedback is gradually lifted up the table. In order to increase the user experience, manufacturers of portable devices have begun to study how to give the user click feedback on a touch device using a vibration motor. The conventional vibration motor is mainly classified into a rotor motor, which generates vibration by rotating an asymmetric cam, and a linear motor, which generates vibration by repeatedly moving a mover back and forth in a specific direction. Since the linear motor does not need to rotate, which means that there is no start delay, the linear motor is a motor which enables the mover to move relatively based on a magnet group, a coil and an air gap between the coil and a magnetic pole which provide an ambient magnetic field. However, most of touch devices are thin flat-plate-shaped, a motor is vibrated in the direction of movement of a rotor parallel to the X axis or Y axis of a screen of the device, the rotor can have sufficient space for a stroke, and a magnet group can be arranged parallel to the direction of movement of the rotor. The Z-axis vibration motor with a normal movement direction of the screen can limit the movement stroke due to the thinning device, and the structure of the magnet group arranged in the movement direction of the rotor can further compress the stroke space. The present inventors have considered the drawbacks of the conventional Z-axis vibration motor, such as the limited mover operation space and the compressed mover operation space of the magnet set. Technical schemes capable of improving the above problems are being actively and continuously developed. Disclosure of Invention The main purpose of the present invention is to increase the actuating stroke by using the magnetic field generated by the coil assembly to attract the stator body made of magnetic conductive material instead of the conventional magnet assembly. And vibration is generated by controlling the variation of the driving voltage. The Z-axis vibration motor comprises a rotor carrier and a stator part. The rotor carrier comprises a suspension spring plate and a coil set, and the stator part comprises a stator part body and a flexible circuit board. The suspension spring plate is long and arranged on two opposite sides of the rotor carrying seat, one end of the suspension spring plate is connected with the rotor carrying seat, the other opposite end is connected with the stator part, the coil group is arranged on the rotor carrying seat and is provided with a coil and a magnetic conduction piece, the vibration axis of the coil is wound by taking the central axis as the center of the winding range of the coil, and the magnetic conduction piece is positioned in the center of the winding range of the coil. The stator part body is box-shaped and can accommodate the rotor carrying seat, the stator part and the rotor carrying seat are made of magnetic conduction materials, and the flexible circuit board is arranged on the stator part body and is electrically connected with the coil group for supplying driving voltage. In a preferred embodiment of the present invention, the driving voltage has a driving frequency, so that the coil assembly forms a vibration magnetic field, the direction of the vibration magnetic field is the same as the vibration axial direction, and the intensity of the vibration magnetic field is changed according to the driving frequency. The coil assembly becomes an electromagnet to attract the stator part body, approaches the stator part by driving the mover carrier, and vibrates due to the intensity change of the vibration magnetic field. In a preferred embodiment of the present invention, the suspension spring is formed in a long sheet shape and is bent in a direction toward the stator portion. The suspension elastic sheet is provided with a connecting part, a bending part and a free end, wherein the connecting part is one end of the suspension elastic sheet, which is connected with the rotor carrier, the free end is positioned at the other end of the suspension elastic sheet, which is opposite to the connecting part, and the bending part is positioned between the connecting part and the free end. Furthermore, the bending part enables the suspension spring plate to form an upper spring plate and a lower spring plate, and the free end and the connecting part are welded and fixed, so that the upper spring plate and the lower spring plate of the suspension s