Vibration motor

Abstract

The vibration motor comprises a shell, a swing seat and an elastic piece, a swing cavity is arranged in the shell, a top swing port communicated with the swing cavity is arranged at the top end of the shell, a front swing port communicated with the swing cavity is arranged on the front side wall of the bottom end of the shell, a stator assembly is fixedly arranged at the bottom of the shell, and the swing seat is movably arranged in the swing cavity. The middle of the swing seat is rotatably connected with the shell, the top end of the swing seat penetrates out of the top swing opening to the outside, the bottom end of the swing seat is provided with a rotor assembly corresponding to the stator assembly, the front side wall of the bottom end of the swing seat is provided with an elastic pressing block, the elastic pressing block is located in the front swing opening, and the two elastic pieces are symmetrically arranged on the left side and the right side of the elastic pressing block. As the elastic pressing block is located at the bottom end of the swing seat, the force arm of the elastic piece relative to the rotating end of the swing seat is increased, the torque applied to the swing seat by the elastic piece is increased accordingly, the output end of the swing seat swings faster at the same swing angle, the torque is larger, and the efficiency of the motor is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a vibration motor. Background Technology

[0002] Vibration motors, as core driving components that convert electrical energy into mechanical vibration, are widely used in consumer electronics, smart wearables, medical devices, and human-computer interaction. In existing technologies, vibration motors typically employ a structural design combining electromagnetic drive and elastic reset. A typical structure includes a housing, a pendulum rod partially rotatably mounted within the housing, a stator assembly located at the bottom of the housing, a mover assembly fixed to the bottom wall of the pendulum rod, and a spring component to assist in the pendulum rod's reset. Specifically, the stator assembly generates a periodically changing magnetic field through alternating current, creating a magnetic repulsion force with the mover assembly, thereby driving the pendulum rod to oscillate around its axis at high frequency. Simultaneously, the spring component applies a restoring force to the pendulum rod through elastic deformation, enabling it to reciprocate under the combined action of magnetic and elastic forces.

[0003] However, the springs in these traditional vibration motors are usually located near the connection end of the swing arm close to the shaft, resulting in a small lever arm between the spring and the connection end of the swing arm, which limits the driving torque at the output end of the swing arm. Utility Model Content

[0004] In view of this, the present invention provides a vibration motor to solve the problem of insufficient driving torque at the output end of the swing arm in the existing vibration motor due to unreasonable spring layout.

[0005] To achieve one, some, or all of the above objectives or other objectives, this utility model proposes a vibration motor, including a housing, a swing seat, and elastic elements. The housing has a swing cavity, a top swing port connecting to the swing cavity is opened at the top of the housing, and a front swing port connecting to the swing cavity is opened on the front side wall of the bottom end of the housing. A stator assembly is fixedly installed at the bottom of the housing. The swing seat is movably disposed in the swing cavity, and the middle part of the swing seat is rotatably connected to the housing. The top of the swing seat extends to the outside through the top swing port. A mover assembly is provided at the bottom end of the swing seat corresponding to the stator assembly, and a spring block is provided on the front side wall of the bottom end of the swing seat. The spring block is located inside the front swing port. Two elastic elements are provided and symmetrically arranged on the left and right sides of the spring block. One end of the elastic element is connected to the spring block, and the other end is connected to the corresponding side of the housing.

[0006] Preferably, the elastic element is a spring.

[0007] Preferably, the bottom front sidewall of the housing is provided with two protrusions, which are symmetrically arranged on the left and right sides of the lower swing opening. One end of the elastic element is connected to the spring block, and the other end is connected to the corresponding protrusion.

[0008] Preferably, rotating shafts are connected to the inner walls on the front and rear sides of the swing cavity, and the middle part of the swing seat is rotatably sleeved on the rotating shafts.

[0009] Preferably, the swing seat and the rotating shaft are rotatably connected through a bearing.

[0010] Preferably, the mover assembly includes a mover and a yoke. There are two yokes, which are symmetrically arranged on both sides of the bottom end of the swing seat, and the mover is clamped between the two yokes.

[0011] Preferably, an installation cavity is provided at the bottom end of the swing seat. An upper through hole connecting to the installation cavity is opened on the rear side wall of the swing seat. Card slots are provided on both the left and right side walls of the installation cavity. Lower through holes are opened on the left half and the right half of the lower side wall of the installation cavity. The mover and the two yokes are both arranged in the installation cavity. The two yokes are symmetrically arranged on the left and right sides of the installation cavity. A clamping block is provided on one side of the yoke, and the clamping block is clamped in the corresponding card slot. The mover is clamped between the two yokes.

[0012] Preferably, the stator assembly includes a stator and a coil. The stator is fixedly arranged at the bottom of the housing, and the coil is wound around the stator.

[0013] Preferably, the housing is assembled by a front frame and a rear frame. The bottom ends of the front frame and the rear frame clamp the top end of the stator inside.

[0014] Preferably, a lever is connected to the top end of the swing seat.

[0015] Implementing the embodiments of the present invention will have the following beneficial effects:

[0016] After adopting the above vibration motor, during use, the stator assembly will frequently reverse the magnetic poles under the commutation control of the current. By attracting and repelling the mover assembly, it drives the mover assembly to drive the swing seat to swing frequently. When the swing seat swings, the elastic pressing block at the bottom end of the swing seat will alternately squeeze the elastic members on both sides of it, causing the two elastic members to continuously deform and store energy or release energy and reset, providing assistance for the swing of the swing seat. And because the elastic pressing block is at the bottom end of the swing seat, the force arm of the elastic member relative to the rotating end of the swing seat increases, and the torque exerted by the elastic member on the swing seat increases accordingly, making the output end of the swing seat swing faster and have greater torque at the same swing angle, improving the efficiency of the motor. At the same time, it is also convenient for users to select short springs, reducing the lateral size of the motor, and facilitating making the device thinner to conform to ergonomics. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] in:

[0019] Figure 1 This is a perspective view of the present utility model;

[0020] Figure 2 This is an exploded view of the present invention;

[0021] Figure 3 This is a cross-sectional view of the present invention;

[0022] Figure 4 This is a perspective view of the swing seat in this utility model.

[0023] In the diagram: 1. Housing; 11. Swinging cavity; 12. Top swing opening; 13. Front swing opening; 14. Protrusion; 2. Front frame; 3. Rear frame; 4. Swing seat; 41. Spring block; 42. Mounting cavity; 43. Upper passage; 44. Slot; 45. Lower passage; 46. Lever; 5. Elastic element; 6. Shaft; 7. Bearing; 81. Mover; 82. Magnetic yoke; 83. Locking block; 91. Stator. Detailed Implementation

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0025] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0027] like Figure 1-4 As shown, a vibration motor includes a housing 1, a swing seat 4, and elastic elements 5. The housing 1 has a swing cavity 11 inside. A top swing opening 12, connecting to the swing cavity 11, is opened at the top of the housing 1. A front swing opening 13, also connecting to the swing cavity 11, is opened on the front side wall of the bottom end of the housing 1. A stator assembly is fixedly mounted at the bottom of the housing 1. The swing seat 4 is movably disposed within the swing cavity 11, with its middle portion rotatably connected to the housing 1. The top of the swing seat 4 extends through the top swing opening 12 to the outside. A mover assembly is correspondingly provided at the bottom end of the swing seat 4 to the stator assembly. A spring-loaded block 41 is provided on the front side wall of the bottom end of the swing seat 4, located within the front swing opening 13. Two elastic elements 5 are provided, symmetrically arranged on the left and right sides of the spring-loaded block 41. One end of each elastic element 5 is connected to the spring-loaded block 41, and the other end is connected to the front side wall of the housing 1. When connected to the corresponding side, the stator assembly will frequently swap the magnetic poles under the commutation control of the current. This attracts and repels the mover assembly, driving the mover assembly to drive the swing seat 4 to swing at high frequency. When the swing seat 4 swings, the spring block 41 at the bottom of the swing seat 4 will alternately squeeze the elastic elements 5 on both sides, causing the two elastic elements 5 to continuously deform and store or release energy to reset, providing assistance for the swing of the swing seat 4. Since the spring block 41 is located at the bottom of the swing seat 4, the lever arm of the elastic element 5 relative to the rotating end of the swing seat 4 increases, and the torque applied by the elastic element 5 to the swing seat 4 increases accordingly. This makes the output end of the swing seat 4 swing faster and with greater torque at the same swing angle, improving the efficiency of the motor. It also makes it easier for users to select short springs, reduce the lateral size of the motor, and make the equipment more compact to meet ergonomic requirements.

[0028] In one embodiment, the mover assembly consists of two permanent magnets with opposite magnetic poles (not shown in the figures).

[0029] In one embodiment, the elastic element 5 is an elastic paddle (not shown in the attached drawings).

[0030] Specifically, the rotation axis of the swing seat 4 is parallel to the opening direction of the front swing port 13.

[0031] Furthermore, the elastic element 5 is a spring, which has good elasticity and is easy to use repeatedly.

[0032] Furthermore, two protrusions 14 are provided on the front side wall of the bottom end of the housing 1. The two protrusions 14 are symmetrically arranged on the left and right sides of the lower swing opening. One end of the elastic element 5 is connected to the spring block 41, and the other end is connected to the corresponding protrusion 14. When the swing seat 4 swings toward one of the protrusions 14, the corresponding protrusion 14 will squeeze the corresponding elastic element 5 together with the spring block 41, while the protrusion 14 on the other side will pull the corresponding elastic element 5 together with the spring block 41, so that the two elastic elements 5 deform at the same time and generate a force to drive the spring block 41 to reset, thus providing assistance for the reset of the swing seat 4. This cycle repeats, driving the swing seat 4 to swing at high frequency.

[0033] Furthermore, a rotating shaft 6 is connected to the inner walls of the front and rear sides of the swing cavity 11. The middle part of the swing seat 4 is rotatably sleeved on the rotating shaft 6. The two ends of the rotating shaft 6 are connected to the inner walls of the corresponding swing cavity 11 by insertion, so as to facilitate the assembly of the swing seat 4 and the rotating shaft 6.

[0034] Furthermore, the swing seat 4 and the rotating shaft 6 are rotatably connected by the bearing 7 to reduce the rotational resistance of the swing seat 4 and make its swing smoother.

[0035] Furthermore, the mover assembly includes a mover 81 and a magnetic yoke 82. There are two magnetic yokes 82, which are symmetrically arranged on both sides of the bottom end of the swing seat 4. The mover 81 is sandwiched between the two magnetic yokes 82, and the two ends of the mover 81 abut against the corresponding magnetic yokes 82 respectively, so as to magnetize the corresponding magnetic yokes 82 by the mover 81, and use the two magnetic yokes 82 as the two magnetic poles of the mover 81, thereby increasing the distance between the magnetic poles of the mover 81, so that the swing seat 4 swings more accurately when the magnetic poles of the stator assembly change.

[0036] Furthermore, the bottom end of the swing seat 4 is provided with a mounting cavity 42, and the rear side wall of the swing seat 4 is provided with an upper passage 43 that connects to the mounting cavity 42. The left and right side walls of the mounting cavity 42 are provided with slots 44, and the left and right halves of the lower side wall of the mounting cavity 42 are provided with lower passages 45. The mover 81 and the two magnetic yokes 82 are all arranged in the mounting cavity 42. The two magnetic yokes 82 are symmetrically arranged on the left and right sides of the mounting cavity 42. One side of the magnetic yoke 82 is provided with a locking block 83, which is engaged in the corresponding slot 44. The mover 81 is clamped between the two magnetic yokes 82.

[0037] In this embodiment, during installation, the two magnetic yokes 82 are first inserted into the mounting cavity 42 through the two lower access ports 45, and the locking block 83 on one side of the magnetic yoke 82 is engaged with the corresponding slot 44 on the inner wall of the mounting cavity 42. After the two magnetic yokes 82 are placed in the same way, the mover 81 is inserted into the mounting cavity 42 through the upper access port 43 and placed between the two magnetic yokes 82. The mover 81 can be fixed in the mounting cavity 42 by adhesive. At this time, the two ends of the mover 81 abut against the magnetic yokes 82 on both sides to magnetize the magnetic yokes 82 and restrict the swing of the magnetic yokes 82, so that the locking block 83 on the magnetic yoke 82 is stably engaged in the slot 44, preventing the magnetic yoke 82 from falling off from the corresponding lower access port 45, and fixing the magnetic yoke 82 in the mounting cavity 42, making the installation of the magnetic yoke 82 and the mover 81 more convenient.

[0038] Furthermore, the stator assembly includes a stator 91 and a coil (not shown), the stator 91 being fixed to the bottom of the housing 1, and the coil being wound on the stator 91.

[0039] In this embodiment, the stator 91 is a "mountain" shaped silicon steel, and the mover 81 is a permanent magnet. The magnetic poles of the mover 81 are distributed along the tangential direction of the swing seat 4. In use, a positive current is first passed into the coil. Under the magnetic effect of the current, the coil and the stator 91 form an induced magnetic field. At this time, the magnetic poles of the end of the stator 91 with the coil are opposite to the magnetic poles of the two outer ends. Therefore, one end of the mover 81 will repel the outer end of the stator 91 and attract the end of the stator 91 with the coil. The other end of the mover 81 will attract the other outer end of the stator 91, thereby causing the bottom end of the swing seat 4 to swing in one direction. When the direction of the current in the coil changes, similarly, the magnetic poles of the end of the stator 91 with the coil and the two outer ends will be reversed, thereby driving the swing seat 4 to move in the opposite direction. By changing the direction of the current in the coil at high frequency, the swing seat 4 is driven to swing at high frequency.

[0040] Furthermore, the housing 1 is assembled from a front frame 2 and a rear frame 3. The bottom end of the front frame 2 and the bottom end of the rear frame 3 clamp the top end of the stator 91 inside, so as to facilitate the assembly of the vibration motor.

[0041] Furthermore, the top of the swing seat 4 is connected to a lever 46. Taking the vibrating motor as the power source of the hair clipper as an example, when the vibrating motor is installed and used, the lever 46 can be connected to the drive end of the hair clipper's blade holder so that the top of the swing seat 4 can drive the blade holder to move back and forth at a high frequency through the lever 46 to achieve the cutting function.

[0042] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A vibration motor, characterized by, include; The housing has a swing cavity inside, a top swing port that connects to the swing cavity is opened at the top of the housing, a front swing port that connects to the swing cavity is opened on the front side wall of the bottom of the housing, and a stator assembly is fixed at the bottom of the housing. A swing seat is movably disposed in a swing cavity. The middle part of the swing seat is rotatably connected to the housing. The top of the swing seat extends to the outside through the top swing opening. The bottom end of the swing seat is provided with a moving part assembly corresponding to the stator assembly. A spring-loaded block is provided on the front side wall of the bottom end of the swing seat. The spring-loaded block is located in the front swing opening. Two elastic elements are provided and symmetrically arranged on the left and right sides of the spring-loaded block. One end of the elastic element is connected to the spring-loaded block and the other end is connected to the corresponding side of the housing.

2. A vibration motor according to claim 1, wherein The elastic element is a spring.

3. A vibration motor according to claim 1, wherein The bottom front sidewall of the housing has two protrusions, which are symmetrically arranged on the left and right sides of the lower swing opening. One end of the elastic element is connected to the spring block, and the other end is connected to the corresponding protrusion.

4. The vibration motor of claim 1, wherein, The inner walls of the front and rear sides of the swing cavity are connected to a rotating shaft, and the middle part of the swing seat is rotatably sleeved on the rotating shaft.

5. A vibration motor according to claim 4, wherein The swing seat and the rotating shaft are rotatably connected by bearings.

6. A vibration motor according to claim 1, characterized in that, The mover assembly includes a mover and a magnetic yoke. There are two magnetic yokes, which are symmetrically arranged on both sides of the bottom end of the swing seat. The mover is sandwiched between the two magnetic yokes.

7. A vibration motor according to claim 6, wherein The bottom end of the swing seat is provided with a mounting cavity, the rear side wall of the swing seat is provided with an upper passage opening that connects to the mounting cavity, the left and right side walls of the mounting cavity are provided with slots, and the left and right halves of the lower side wall of the mounting cavity are provided with lower passage openings. The mover and the two magnetic yokes are all disposed in the mounting cavity. The two magnetic yokes are symmetrically disposed on the left and right sides of the mounting cavity. A locking block is provided on one side of the magnetic yoke. The locking block is engaged in the corresponding locking slot. The mover is clamped between the two magnetic yokes.

8. The vibration motor of claim 1, wherein, The stator assembly includes a stator and a coil, the stator being fixed to the bottom of the housing and the coil being wound around the stator.

9. A vibration motor according to claim 8, wherein The housing is assembled from a front frame and a rear frame, with the bottom ends of the front frame and the rear frame clamping the top end of the stator inside.

10. The vibration motor of claim 1, wherein, A lever is connected to the top of the swing seat.

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