CN-115347713-B - Vibration motor

Abstract

The invention provides a vibration motor. The vibration motor includes an insulating housing, a bi-directional coil, and a magnetic ring. The insulating housing is cylindric, and the inside wall of insulating housing epirelief is equipped with at least three spacing sand grip, and each spacing sand grip is parallel to insulating housing's center pin direction and extends respectively, and insulating housing contains a pair of end plate that is located insulating housing both ends, and the end plate is insulating material and makes. The bidirectional coil is accommodated in the insulating shell and is arranged at intervals with the inner side wall of the insulating shell. The magnetic ring is movably accommodated in the insulating shell, is coaxially arranged with the insulating shell and surrounds the bidirectional coil. The limit convex strips are arranged close to the magnetic ring and around the outer edge of the magnetic ring.

Inventors

• CHEN LIQUN
• CAI MINGZHI
• CHEN JIECHENG

Assignees

• 台达电子工业股份有限公司

Dates

Publication Date

20260505

Application Date

20210514

Claims (12)

1. 1. A vibration motor, comprising: The insulating shell is cylindrical, at least three limit protruding strips are arranged on the inner side wall of the insulating shell in a protruding mode, each limit protruding strip extends in parallel to the central axis direction of the insulating shell, the insulating shell comprises a pair of end plates, one end plate is located at one end of the insulating shell, the other end plate is located at the other end of the insulating shell, and the end plates are made of insulating materials; a bidirectional coil accommodated in the insulating housing and spaced apart from the inner side wall of the insulating housing, and A magnetic ring movably accommodated in the insulating housing, the magnetic ring being coaxially disposed with the insulating housing and surrounding the bi-directional coil, Wherein the limit convex strips are closely adjacent to the magnetic ring and are arranged around the outer edge of the magnetic ring; Wherein an elastic ring is arranged in the insulating shell, one side of the elastic ring is convexly provided with a plurality of convex parts, and the convex parts are convexly towards the magnetic ring; Wherein the plurality of convex parts comprise a plurality of convex cones, and the heights of a part of the plurality of convex cones are different from the heights of the rest of the plurality of convex cones.
2. 2. The vibration motor of claim 1, wherein the sidewall of each of the limiting ribs is a cambered surface.
3. 3. The vibration motor of claim 1, wherein a positioning pin is disposed in the insulating housing, the positioning pin is disposed along a central axis of the insulating housing, and the bidirectional coil is sleeved on the positioning pin.
4. 4. The vibration motor of claim 3, wherein the locating pin is integrally formed with the insulating housing.
5. 5. The vibration motor of claim 1, wherein the bi-directional coil is sandwiched between the pair of end plates.
6. 6. The vibration motor of claim 1, wherein each of the protrusions forms a convex cone.
7. 7. The vibration motor according to claim 1 or 6, wherein the tip of each of the convex cones is formed with a flat surface.
8. 8. The vibration motor of claim 1, wherein the bi-directional coil comprises a first winding set and a second winding set coaxially stacked, and the winding directions of the first winding set and the second winding set are opposite.
9. 9. The vibration motor of claim 8, further comprising a control circuit board electrically connected to the first winding set and the second winding set, respectively.
10. 10. The vibration motor of claim 9, wherein the first winding set is electrically connected to the second winding set.
11. 11. The vibration motor of claim 1, wherein an outer edge of the bi-directional coil is spaced from an inner edge of the magnetic ring.
12. 12. The vibration motor of claim 1, wherein the polarities of the two sides of the magnetic ring are different.

Description

Vibration motor Technical Field The present invention relates to vibration motors, and more particularly, to a noise reduction vibration motor. Background The current linear motor needs a winding frame structure or more than two windings to realize bipolar coils to excite the vibrator magnet to achieve repeated motion, and the effective space used in the structure is reduced along with the trend of the linear motor to be thinner and thinner, so that space waste is caused, and the winding space is reduced or a plurality of outgoing lines are led to increase the difficulty of the output wire arrangement process. The traditional design shell uses a metal outer frame, the vibrator magnet is in a ring shape, and the centering and positioning of the vibrator magnet generally depend on a central column, a spring plate or a spring and other components. The relative positions of the vibrator magnet and the coil are two kinds of arrangement. When the vibrator magnet is arranged in the coil, the vibrator magnet is sleeved on a center column and slides along the center column to vibrate. The positioning of the center post easily results in frictional noise of the moving member when actuated. When the coil is placed in the vibrator magnet, since the vibrator magnet does not contact the shell along the transverse direction of the coil, the vibrator magnet is required to be axially provided with an elastic sheet or a spring to clamp the vibrator magnet, besides one more material cost, the elastic member can absorb vibration so as to reduce vibration force generated when the vibrator magnet acts, thereby reducing the touch feeling of a user and easily generating non-preset vibration in the transverse direction. In view of the above, the present inventors have made intensive studies and have made an effort to solve the above-described problems in combination with the application of the theory, which is an object of improvement by the present inventors. Disclosure of Invention The invention aims to provide a noise-reducing vibration motor. The invention provides a vibration motor, which comprises an insulating shell, a bidirectional coil and a magnetic ring. The insulating housing is cylindric, and the inside wall of insulating housing epirelief is equipped with at least three spacing sand grip, and each spacing sand grip is parallel to insulating housing's center pin direction and extends respectively, and insulating housing contains a pair of end plate, and one of them end plate is located insulating housing's one end, and another end plate is located insulating housing's the other end, and the end plate is made for insulating material. The bidirectional coil is accommodated in the insulating shell and is arranged at intervals with the inner side wall of the insulating shell. The magnetic ring is movably accommodated in the insulating shell, is coaxially arranged with the insulating shell and surrounds the bidirectional coil. The limit convex strips are arranged close to the magnetic ring and around the outer edge of the magnetic ring. The side wall surface of each limit convex strip of the vibration motor is an arc surface. The vibration motor of the invention is characterized in that a positioning pin is arranged in an insulating shell, the positioning pin is along the central axis of the insulating shell, and a bidirectional coil is sleeved on the positioning pin. The locating pin and the insulating housing are integrally formed. The vibration motor of the present invention has its bi-directional coil sandwiched between the pair of end plates. The vibration motor is characterized in that an elastic ring is arranged in an insulating shell, one side of the elastic ring is convexly provided with a plurality of convex parts, and the convex parts are convexly towards the magnetic ring. Each convex part forms a convex cone. The convex part comprises a plurality of convex cones, and the heights of a part of the plurality of convex cones are different from the heights of the rest of the plurality of convex cones. The tip of each convex cone is formed with a plane. The invention relates to a vibration motor, wherein a bidirectional coil comprises a first winding group and a second winding group which are coaxially stacked, and the winding directions of the first winding group and the second winding group are opposite. The vibration motor further comprises a control circuit board which is electrically connected with the first winding group and the second winding group respectively. The first winding group is electrically connected with the second winding group. The outer edge of the bidirectional coil and the inner edge of the magnetic ring are arranged at intervals. The polarities of the two sides of the magnetic ring are different. The vibration motor of the invention has at least three limit protruding strips on the inner wall surface of the insulating shell to limit the action space of the magnetic ring, thereby limiting the