Swinging vibration motor

Abstract

The utility model relates to the technical field of vibration motors, and discloses a swing vibration motor, which comprises a shell with an opening at one end, a plate-shaped cover body, a stator assembly, a rotor assembly, a fixed shaft and a springback mechanism, the shell and the cover body are matched and buckled to form an accommodating space, the fixed shaft is fixed on the cover body, and the springback mechanism is fixed on the fixed shaft. The stator assembly is sleeved on the fixed shaft and rotates around the fixed shaft, the stator assembly, the rotor assembly, the fixed shaft and the springback mechanism are accommodated in the accommodating space, and the shell comprises a rectangular bottom wall and side walls formed by vertically bending four sides of the bottom wall in the same direction; the springback mechanism comprises a torsional spring part and connecting arms which extend in parallel from the free ends of the upper side and the lower side in the axial direction of the torsional spring part. The torsional spring part is limited in the rotor assembly, and the free end of the connecting arm extends and is fixed on the side wall. The swing vibration motor is novel in structure, more diversified vibration modes of the swing vibration motor can be realized, and the vibration sense is stronger.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration motors, and particularly to a swinging vibration motor. Background Art

[0002] With the development of electronic technology, portable consumer electronic products have gradually occupied the global consumer market, such as mobile phones, handheld game consoles, multimedia entertainment devices, etc. These electronic products generally use vibration motors for tactile feedback, such as incoming call reminders on mobile phones, vibration feedback on game consoles, etc. To meet such a wide range of applications, the requirements for the vibration performance of vibration motors are getting higher and higher.

[0003] Existing vibration motors usually include surface-mounted columnar vibration motors. The eccentric hammer provided on the rotating shaft rotates at high speed under the driving force of the motor. However, the vibration mode of the surface-mounted columnar vibration motor is single, and the vibration experience obtained by customers is also relatively single. Therefore, it is necessary to provide a vibration motor with more diverse vibration modes and stronger vibration sensations. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a swinging vibration motor with more diverse vibration modes and stronger vibration sensations. The specific technical solution is as follows:

[0005] A swinging vibration motor includes a housing with an open end, a plate-shaped cover, a stator assembly, a rotor assembly, a fixed shaft, and a spring-back mechanism. The housing and the cover are fitted and buckled to form an accommodation space. The fixed shaft is fixed on the cover. The rotor assembly is sleeved on the fixed shaft and rotates around it. The stator assembly, the rotor assembly, the fixed shaft, and the spring-back mechanism are accommodated in the accommodation space. The housing includes a rectangular bottom wall and side walls perpendicularly bent in the same direction from the four sides of the bottom wall. The spring-back mechanism includes a torsion spring part and connecting arms extending parallel from the free ends on the upper and lower axial sides of the torsion spring part. The torsion spring part is limited in the rotor assembly, and the free ends of the connecting arms extend and are fixed on the side walls.

[0006] Preferably, the rotor assembly includes a cuboid mass block, a permanent magnet, and a sliding bearing. The mass block includes a first through hole penetrating its axial thickness and located at the central position, second through holes symmetrically located on both sides of the first through hole, and a blind groove communicating with the first through hole and penetrating the lower surface of the mass block. The sliding bearing is fixed in the first through hole. The torsion spring part is limited in the first through hole. The sliding bearing and the torsion spring part are axially sleeved on the fixed shaft up and down, and the connecting arms are embedded in the blind groove.

[0007] Preferably, the connecting arms are located on the same side of the torsion spring part, and the axial projections of the connecting arms on the upper and lower sides of the torsion spring part are on the same straight line.

[0008] Preferably, the blind slots are located between the second through holes, and the axial depth of the blind slots is adapted to the axial height of the connecting arms.

[0009] Preferably, the center line of the blind slots is perpendicular to the center connection line of the first through hole and the second through hole slots.

[0010] Preferably, fixing parts are arranged corresponding to the blind slots at the free ends of the long sides of the side walls.

[0011] Preferably, the fixing parts are formed by punching and bending the side walls, the fixing parts are perpendicular to the side walls, and the connecting arms pass through the blind slots and extend to the fixing parts and are flush with the outer surfaces of the side walls.

[0012] Preferably, the stator assembly includes two coils and a flexible circuit board. The flexible circuit board is fixedly attached to the inner surface of the cover body, and the coils are fixed to the inner surfaces at two diagonal positions of the side walls and are arranged corresponding to the permanent magnets.

[0013] Preferably, damping sheets are arranged on the inner surfaces at the four corners of the long sides of the side walls. The damping sheets are arranged on the same side as the coils and are located outside the coils; a limiting part is protruded on the inner surface of the bottom wall corresponding to the fixed shaft.

[0014] Preferably, the fixing parts are arranged as grooves adapted to the connecting arms.

[0015] Compared with the prior art, the utility model not only has a novel structure, but also can realize more diverse vibration modes of the swing vibration motor and has a stronger vibration feeling. Description of the Drawings

[0016] Figure 1 is an exploded view of the structure of the first embodiment of the utility model.

[0017] Figure 2 is an exploded view of the structure of the rotor assembly and the spring-back mechanism of the first embodiment of the utility model.

[0018] Figure 3 is an assembly schematic diagram of the rotor assembly, the spring-back mechanism and the housing of the first embodiment of the utility model.

[0019] Figure 4 is a schematic diagram of the housing structure of the first embodiment of the utility model.

[0020] Figure 5 is a schematic diagram of the housing structure of the second embodiment of the utility model.

[0021] Wherein:

[0022] 1 - housing; 10 - first bottom wall; 1OO - limiting part; 11 - side wall; 110 - fixing part;

[0023] 2 - Cover body:

[0024] 30 - Flexible circuit board; 31 - Coil;

[0025] 4 - Rotor assembly; 40 - Mass block; 41 - Permanent magnet; 42 - Sliding bearing;

[0026] 400 - First through - hole; 401 - Second through - hole;

[0027] 5 - Fixed shaft:

[0028] 6 - Rebound mechanism; 60 - Torsion spring part; 61 - Connecting arm;

[0029] 7 - Damping piece. Detailed implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] A swing vibration motor structure according to the first embodiment of the present invention is as Figures 1 to 4 shown, including a housing 1 with one end open, a plate - shaped cover body 2, a stator assembly (not labeled), a rotor assembly 4, a fixed shaft 5, and a rebound mechanism 6. The housing 1 and the cover body 2 are fitted and fastened to form a receiving space. One end of the fixed shaft 5 is fixed at the central position of the inner surface of the cover body 2. The rotor assembly 4 is sleeved on the fixed shaft 5 and rotates around it. The stator assembly, the rotor assembly 4, the fixed shaft 5, and the rebound mechanism 6 are received in the receiving space. Among them, one side of the housing 1 in the present invention is set as the upper part of the swing vibration motor, and the cover body 2 side is the lower part of the swing vibration motor.

[0032] The housing 1 includes a rectangular bottom wall 10 and side walls 11 vertically bent in the same direction from the four sides of the bottom wall 10; a limiting portion 100 corresponding to the fixed shaft 5 is provided on the inner surface of the bottom wall 10. The limiting portion 100 is a convex annular groove to axially limit the fixed shaft 5 in the receiving space.

[0033] The rebound mechanism 6 includes a torsion spring part 60 and connecting arms 61 extending parallel from the free ends on the upper and lower sides of the torsion spring part 60 axially; among them, the connecting arms 61 are located on the same side of the torsion spring part 60, and the axial projections of the connecting arms 61 on the upper and lower sides of the torsion spring part 60 are on the same straight line; the torsion spring part 60 is limited in the rotor assembly 4, and the free ends of the connecting arms 61 extend and are fixed on the long - side side wall 11 of the housing 1.

[0034] The rotor assembly 4 includes a rectangular mass block 40, a permanent magnet 41 fixed in the mass block 40, and a sliding bearing 42. The rotor assembly rotates around the fixed axis 5 between the sliding bearing 42, wherein the mass block 40 includes a first through hole 400 that runs through its axial thickness and is located at the center, second through holes 401 that are symmetrically located on both sides of the first through hole 400, and a blind groove 402 that is connected to the first through hole 400 and runs through the lower surface of the mass block, wherein the blind groove 402 is located between the second through holes 401, and the center line (not marked) of the blind groove 402 is aligned with the first through hole 400 and the second through hole 401. The center line (not marked) of the groove 1 is vertical, thereby shortening the length of the connecting arm 61 in the width direction of the swing vibration motor as much as possible; the sliding bearing 42 is fixed in the first through hole 400, the torsion spring portion 60 is limited in the first through hole 400, the sliding bearing 42 and the torsion spring portion 60 are axially sleeved on the fixed shaft 5 in the upper and lower directions, thereby saving the axial space utilization of the swing vibration motor, and the connecting arm 61 is embedded in the blind groove 402, and the axial depth of the blind groove 402 is adapted to the axial height of the connecting arm 61, thereby optimizing the space utilization rate of the rebound mechanism 6 in the accommodating space of the swing vibration motor as a whole. A fixing portion 110 is provided at the free end of the long side wall 11 of the shell 1 corresponding to the blind groove 402. The fixing portion 110 is formed by punching and bending the side wall 11. The fixing portion 110 is perpendicular to the side wall 11. Therefore, the setting of the fixing portion 110 forms a notch (not marked) in the side wall 11 corresponding to the position of the fixing portion 110. The free end of the connecting arm 61 extends through the blind groove 402 to the fixing portion 110 and is flush with the outer surface of the side wall 11. The connection and fixation of the connecting arm 61 of the rebound structure 6 to the shell 1 is achieved by welding and fixing the free end of the connecting arm 61 to the fixing portion 110. The length of the fixing portion 110 is less than the distance between the long side surface of the rotor assembly 4 and the inner surface of the side wall 11, so as not to affect the rotation of the rotor assembly 4. The setting of the fixing portion 110 can increase the welding area between the side wall 11 and the connecting arm 61, and optimize the connection strength between the connecting arm 61 and the shell 1.

[0035] The stator assembly includes a flexible circuit board 30 and a coil 31 electrically connected to the flexible circuit board 30. One end (not marked) of the flexible circuit board 30 is fixedly attached to the inner surface of the cover 2, and the other end (not marked) extends out of the accommodation space to electrically connect to an external power source (not marked). The coil 31 is fixed at the diagonal position on the inner surface of the long side wall 11 of the housing 1 and is arranged corresponding to the permanent magnet 41 of the rotor assembly 4. The swing vibration motor uses a square wave current. The magnetic field generated by the energization of the coil 31 acts on the magnet 41 to cause the rotor assembly 4 to rotate. By switching the current input to the coil 31, the magnetic field generated by the energization of the coil 31 attracts and repels the magnet 41, causing the rotor assembly 4 to rotate reciprocally. The rebound mechanism 6 is provided to keep the rotor assembly 4 at the initial position in the accommodation space, that is, the distances between the two long side surfaces of the rotor assembly 4 and the long side wall 11 of the housing 1 are equal. Preferably, damping sheets 7 are provided on the inner surfaces at the four corners of the long side of the side wall 11. The damping sheets 7 are arranged on the same side as the coil 31 and are located outside the coil 31. When the rotor assembly 4 rotates in the accommodation space, the damping sheets 7 prevent the four corners of the mass block 40 of the rotor assembly 4 from directly hitting the side wall 11 of the housing 1, preventing the housing 1 from deforming due to impact and generating noise, thereby improving the service life of the vibration and ensuring the vibration performance of the swing vibration motor.

[0036] The structure of the housing 1 of a swing vibration motor according to the second embodiment of the present invention is as Figure 5 shown. The housing 1 in the second embodiment has a more simplified structure and saves processing procedures compared to the housing 1 in the first embodiment. The fixing portion 110 on the side wall 11 is provided as a groove 110 adapted to the connecting arm 61. Specifically, the connecting arm 61 extends and is clamped in the groove 110, and then the connecting arm 61 is welded in the groove 110. The free end surface of the connecting arm 61 is flush with the outer surface of the side wall 11 to ensure the contact area between the connecting arm 61 and the housing 1 to achieve effective connection strength. At the same time, it does not affect the overall occupied space of the swing vibration motor.

[0037] A swing vibration motor of the present utility model generates strong vibrations through the reciprocating rotation of the rotor assembly 3, enabling users to experience high-quality vibration feedback. The rebound mechanism 6 is used to maintain the initial position of the rotor assembly 4 when the stator assembly 3 is not powered on, and to provide a restoring force for the rotor assembly 3 to reset after the stator assembly 3 is powered off. Among them, the rebound mechanism 6 is limited within the rotor assembly 4 by its torsion spring portion 60 and is sleeved on the fixed shaft 5 together with the rotor assembly 4. The connecting arm 61 is adapted to the blind slot 402 of the rotor assembly 4, and the free end of the connecting arm 61 is fixedly connected to the fixing portion 110 on the long side side wall 11 of the housing 1. When the coil 31 is not powered on, the rebound mechanism 6 holds the rotor assembly 4 at the initial position within the accommodating space through its connecting arm 61. At this time, the torsion spring portion 60 is in its original undeformed state. When the coil 31 is powered on, the rotor assembly 4 reciprocally rotates within the accommodating space, and the connecting arm 61 adapted to the blind slot of the rotor assembly 4 rotates reciprocally with the rotor assembly 4, thereby causing the torsion spring portion 60 to be subjected to clockwise and counterclockwise torques by the connecting arm 61 within the first through hole 400. The torsion spring portion 60 thus generates positive and negative deformations; especially when the current of the coil 31 is commutated, the rotor assembly 4 rotates in the reverse direction, driving the connecting arm 61 of the rebound mechanism 6 to deform in the reverse direction, enabling the positive deformation energy accumulated by the torsion spring portion 60 to drive the rotor assembly 4 to quickly rotate back, thereby outputting a stronger vibration sensation; when the coil 31 is powered off, the rotor assembly 4 stops rotating, causing the external force deforming the torsion spring portion 60 to disappear, and the torsion spring portion 60 returns to its original state due to its own property, thereby driving the connecting arm 61 to hold the rotor assembly 4 at the initial position within the accommodating space.

[0038] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "horizontal direction", "vertical direction", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0039] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A swing vibration motor, comprising a housing with an opening at one end, a plate-shaped cover, a stator assembly, a rotor assembly, a fixed shaft and a rebound mechanism, wherein the housing and the cover are adapted to be buckled to form a receiving space, the fixed shaft is fixed on the cover, the rotor assembly is sleeved on the fixed shaft and rotates around the fixed shaft, the stator assembly, the rotor assembly, the fixed shaft and the rebound mechanism are received in the receiving space, and characterized in that: The shell includes a rectangular bottom wall and side walls formed by vertically bending the four sides of the bottom wall in the same direction; the rebound mechanism includes a torsion spring portion and connecting arms extending parallel to the free ends of the upper and lower sides of the torsion spring portion axially; the torsion spring portion is confined in the rotor assembly, and the free end of the connecting arm extends and is fixed on the side wall.

2. The oscillating vibration motor according to claim 1, characterized in that: The rotor assembly includes a rectangular mass block, a permanent magnet and a sliding bearing. The mass block includes a first through hole that runs through its axial thickness and is located at the center, second through holes that are symmetrically located on both sides of the first through hole, and a blind groove that is connected to the first through hole and runs through the lower surface of the mass block. The sliding bearing is fixed in the first through hole, and the torsion spring part is limited to the first through hole. The sliding bearing and the torsion spring part are axially sleeved on the fixed shaft in the upper and lower directions, and the connecting arm is embedded in the blind groove.

3. The oscillating vibration motor according to claim 2, characterized in that: The connecting arms are located on the same side of the torsion spring portion, and axial projections of the connecting arms on the upper and lower sides of the torsion spring portion are on the same straight line.

4. The oscillating vibration motor according to claim 3, characterized in that: The blind groove is located between the second through holes, and the axial depth of the blind groove is adapted to the axial height of the connecting arm.

5. The oscillating vibration motor according to claim 4, characterized in that: The center line of the blind groove is perpendicular to the center line of the first through hole and the second through hole groove.

6. The oscillating vibration motor according to claim 5, characterized in that: A fixing portion is provided at the free end of the long side of the side wall corresponding to the blind groove.

7. The oscillating vibration motor according to claim 6, characterized in that: The fixing portion is formed by punching and bending the side wall, the fixing portion is perpendicular to the side wall, and the connecting arm passes through the blind groove, extends to the fixing portion and is flush with the outer surface of the side wall.

8. The oscillating vibration motor according to claim 7, characterized in that: The stator assembly includes two coils and a flexible circuit board. The flexible circuit board is adhered and fixed to the inner surface of the cover body. The coils are fixed to the inner surfaces of two diagonal positions of the side wall and are arranged corresponding to the permanent magnets.

9. The oscillating vibration motor according to claim 8, characterized in that: The inner surface of the four corners of the long side of the side wall is provided with damping plates, which are arranged on the same side as the coil and located outside the coil; the inner surface of the bottom wall is provided with a limiting portion corresponding to the fixed axis protrusion.

10. The oscillating vibration motor according to claim 6, characterized in that: The fixing portion is configured as a groove adapted to the connecting arm.

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