VIBRATION MOTOR WITH VIBRATION IN THE DIRECTION OF Z-AXIS

Abstract

A vibration motor with vibration in the direction of Z-axis is provided, including a mover carrier and a stator part; wherein, the mover carrier includes a suspension spring and a coil set, the stator part includes a stator part body and a flexible printed circuit board. The suspension spring is arranged on two opposite sides of the mover carrier, with one end connected to the mover carrier and the other end to the stator part. The coil set includes a coil, wound around the vibration axis, and a magnetically conductive member located at the center of the coil. The two opposite sides of the stator part are connected to suspension spring to form an air gap between the stator part and the mover carrier. The stator part body accommodates the mover carrier. The flexible printed circuit board is arranged on the stator body and electrically connected to the coil set.

Claims

1. A vibration motor with vibration in the direction of Z-axis, comprising: a mover carrier, made of magnetically conductive material, and further comprising: a suspension spring, in the shape of a long piece and arranged on opposite sides of the mover carrier, with one end connected to the mover carrier and the other end connected to a stator part; and a coil set, arranged on the mover carrier, and having a coil and a magnetic conductive member, the vibration axis of the coil being wound around a central axis, and the magnetic conductive member being located at the center of a range around which the coil being wound; and the stator part, having two opposite sides connected with suspension elastic pieces to form an air gap between the stator part and the mover carrier, and further comprising: a stator part body, box-shaped to accommodate the mover carrier, and made of magnetically conductive material; and a flexible circuit board, provided on the stator body to electrically connect the coil set to supply a driving voltage; wherein, the driving voltage has a driving frequency, causing the coil set to form an oscillating magnetic field in the vibration axis direction, the driving frequency changes the driving voltage to change the intensity of the oscillating magnetic field, thereby controlling and changing the attraction between the coil and the stator part to cause vibration.

2. The vibration motor with vibration in the direction of Z-axis according to claim 1, wherein the suspension spring comprises: a connecting part, the one end of the suspension spring connected to the mover carrier; a free end, located at the other end of the suspension spring opposite to the connecting part; and a bent part, located between the connecting part and the free end; wherein the bending part enables the suspension spring to form an upper elastic piece and a lower elastic piece, the upper elastic piece is located between the connecting part and the bent part, the lower elastic piece is located between the bent part and the free end, the lower elastic piece is closer to the stator body than the upper elastic piece, and the free end and the connecting part are connected and fixed to each other; wherein the connecting parts of the suspension springs connects the two opposite sides of the mover carrier in opposite directions.

3. The vibration motor with vibration in the direction of Z-axis according to claim 2, wherein the bent part, the upper elastic piece, and the lower elastic piece together form a fitting space, a fixed block is placed in the fitting space; Wherein, after the fixed block is placed in the fitting space, the upper elastic piece and the lower elastic piece are welded to be fixed to the fixed block respectively.

4. The vibration motor with vibration in the direction of Z-axis according to claim 3, wherein the side of the fixed block away from the mover carrier is the fitting surface, the fitting surface is in contact with the inner side walls of two opposite sides on the stator body corresponding to the suspension springe, and the mover carrier and the stator are fixedly connected by welding and assembly.

5. The vibration motor with vibration in the direction of Z-axis according to claim 4, wherein the mover carrier and the suspension spring are integrally formed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be apparent to those skilled in the art by reading the following detailed description of a preferred embodiment thereof, with reference to the attached drawings, in which:

[0019] FIG. 1 is an exploded perspective view of an embodiment of the present invention;

[0020] FIG. 2 is a perspective bottom view of the mover carrier according to the embodiment of the present invention;

[0021] FIG. 3 is a schematic top view of the stator part and coil according to the embodiment of the present invention;

[0022] FIG. 4 is a top view of an embodiment of the present invention;

[0023] FIG. 5 is a cross-sectional view of the application of the embodiment of the present invention along the V-V direction of FIG. 4; and

[0024] FIG. 6 is a top perspective view of the mover carrier according to the embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0025] The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0026] FIGS. 1 to 6 are schematic view of an embodiment of the present invention. As shown in FIG. 1, an exploded perspective view of the embodiment of the present invention, the vibration motor with vibration in the direction of Z-axis according to the present invention includes: a mover carrier 1 and a stator part 2. FIG. 1 and FIG. 2 show the perspective bottom view of the mover carrier 1 according to the embodiment of the present invention. The mover carrier 1 has: a suspension spring 11 and a coil set 12; and the stator part 2 has: a stator part body 21 and a flexible printed circuit board 22. The suspension spring 11 is a long piece and is arranged on two opposite sides of the mover carrier 1, and one end of the suspension spring 11 is connected to the mover carrier 1 and the other end is connected to the stator part 2; and the coil set 12 is arranged on the mover carrier 1 and further includes a coil 121 and a magnetic conductive member 122. The coil 121 is wound with the vibration axis as the central axis, and the magnetic conductive member 122 is located at the center of a range around which the coil 121 is wound.

[0027] As shown in the top view of the stator part 2 and the coil set 12 of the embodiment of the present invention in FIG. 3 and the top view of the embodiment of the present invention in FIG. 4, the two opposite sides of the stator part 2 are connected with suspension spring 11 and an air gap is formed between the stator part 2 and the mover carrier 1. Both the stator part 2 and the mover carrier 1 are made of magnetically conductive materials. The stator part body 21 is box-shaped and can accommodate the mover carrier 1. The flexible printed circuit board 22 is disposed on the stator body 21 and is electrically connected to the coil set 12 for supplying driving voltage to the coil set 12.

[0028] Specifically, the driving voltage has a driving frequency, causing the coil set 12 to generate a vibration magnetic field. The direction of the vibration magnetic field is the same as the vibration axis, and the intensity of the vibration magnetic field changes according to the driving frequency. As shown in the cross-sectional view of the embodiment of the present invention in the V-V direction of FIG. 5 and FIG. 4, the coil set 12 becomes an electromagnet to attract the stator body 21 and changes the intensity of the vibrating magnetic field by changing the driving voltage generated by the driving frequency, thereby driving the mover carrier 1 to move close to the stator part 2. Also, the intensity of the vibration magnetic field changes, hence causing the mover carrier 1 to vibrate.

[0029] As shown in FIG. 6, which is a top perspective view of the mover carrier 1 according to the embodiment of the present invention, the suspension spring 11 is in the shape of a long piece and is bent toward the stator part 2. The suspension spring 11 includes a connecting part 111, a bent part 112 and a free end 113, wherein the connecting part 111 is the end of the suspension spring 11 connected to the mover carrier 1; the free end 113 is located at the other end of the suspension spring 11 opposite to the connecting part 111; and the bent part 112 is located in the middle section of the suspension spring 11.

[0030] Furthermore, the bent part 112 enables the suspension spring 11 to form an upper elastic piece 114 and a lower elastic piece 115. The upper elastic piece 114 is located between the connecting part 111 and the bent part 112, the lower elastic piece 115 is located between the bent part 112 and the free end 113, and the lower elastic piece 115 is closer to the stator body 21 than the upper elastic piece 114. The free end 113 needs to be welded and fixed to the connecting part 111 so that the upper elastic piece 114 and the lower elastic piece 115 of the suspension spring 11 are parallel to each other.

[0031] Specifically, by bending the suspension spring 11 to form an upper elastic piece 114 and a lower elastic piece 115, the air gap distance between the mover carrier 1 and the stator part 2 can be increased. At the same time, the bent structure of the suspension spring 11 can also increase the elastic deformation range of the mover carrier 1, and enable the mover carrier 1 to vibrate in the vibration axis direction.

[0032] In a preferred application, as shown in FIG. 4, the connecting part 111 of the suspension spring 11 connects the two opposite sides of the mover carrier 1 in opposite directions.

[0033] Specifically, the suspension springs 11 are connected to the opposite sides of the mover carrier 1, providing a mechanism for the mover carrier 1 to move parallel in the vibration direction, so that the mover carrier 1 will not vibrate in deviation to one side causes elastic fatigue of the suspension spring 11 during the vibration process.

[0034] As shown in FIGS. 2 and 6, the bent part 112, the upper elastic piece 114, and the lower elastic piece 115 together form a fitting space 110. The suspension spring 11 also has a fixed block 10, which can be placed in the fitting space 110. After the fixed block 10 is placed into the fitting space 110, the upper elastic piece 114 and the lower elastic piece 115 are welded and fixed to the fixed block 10 respectively, and the side of the fixed block 10 away from the mover carrier 1 is defined as the fitting surface 101.

[0035] As shown in FIG. 4, when the mover carrier 1 is installed into the stator body 21, the fitting surface 101 and the inner wall surfaces of the stator body 21 corresponding to the two opposite sides of the suspension spring 11 are in contact with each other.

[0036] Specifically, when assembling the vibration motor with vibration in the direction of Z-axis according to the present invention, the fitting surface 101 and the wall surface can be welded and assembled to fix the mover carrier 1 and the stator part 2. No other additional welding is required.

[0037] Preferably, the mover carrier 1 and the suspension spring 11 are integrally formed in one piece.

[0038] In a preferred embodiment, whether it is a positive voltage or a negative voltage, the coil group 12 generates magnetic attraction to the stator part 2. Therefore, when the driving frequency is a continuous sine wave, the vibration frequency of the mover carrier 1 is twice the driving frequency.

[0039] Although the present invention has been described with reference to the preferred embodiments thereof, it is apparent to those skilled in the art that a variety of modifications and changes may be made without departing from the scope of the present invention which is intended to be defined by the appended claims.