Rotary vibration motor

Abstract

The utility model relates to vibration motor technical field discloses a kind of rotary vibration motors, including the cylindrical upper shell of one end opening, lower cover, stator assembly, and rotor assembly, the upper shell and lower cover buckle formation accommodating space, stator assembly and rotor assembly are fixed in the accommodating space, the rotor assembly is fixed in the circumcenter position between the upper shell and lower cover;The stator assembly is fixed in the inner surface of the lower cover;The rotor assembly includes eccentric block, the circumcenter position side of the lower cover integrally stamping formation spaced apart splayed baffle, the eccentric block is located between the baffle, and magnetic field is generated by switching coil current direction and mutual attraction and repulsion of permanent magnet, so that rotor assembly reciprocating rotation, vibration is generated by eccentric block, realize more vibration mode and stronger vibration feeling.

Description

Technical Field

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

[0002] With the development of electronic technology, portable consumer electronics products have gradually occupied the global consumer market, such as mobile phones, handheld game consoles, and multimedia entertainment devices. These electronic products generally use vibration motors for haptic feedback, such as incoming call notifications on mobile phones and vibration feedback in game consoles. To meet such a wide range of applications, the vibration performance requirements for vibration motors are becoming increasingly stringent. Existing vibration motors are typically surface-mount cylindrical vibration motors, where an eccentric hammer mounted on the shaft rotates at high speed under the motor's driving force. However, surface-mount cylindrical vibration motors offer a limited vibration mode, resulting in a relatively simple vibration experience for customers. Therefore, it is necessary to provide a vibration motor with more diverse vibration modes and a stronger vibration feel. Utility Model Content

[0003] The purpose of this utility model is to provide a rotary vibration motor with strong vibration feedback, and its specific technical solution is as follows:

[0004] A rotary vibration motor includes a cylindrical upper shell with one end open, a lower cover, a stator assembly, and a rotor assembly. The upper shell and the lower cover are fastened together to form an accommodating space. The stator assembly and the rotor assembly are fixedly spaced within the accommodating space. The rotor assembly is fixed at a central position between the upper shell and the lower cover. The stator assembly is fixed to the inner surface of the lower cover. The rotor assembly includes an eccentric block. A spaced-out V-shaped baffle is integrally stamped on one side of the central position of the lower cover. The eccentric block is spaced between the baffles.

[0005] Preferably, the rotor assembly further includes a fixed shaft, ball bearings, and a permanent magnet. The fixed shaft is fixedly inserted through one side of the eccentric block. The ball bearings are sleeved on the fixed shaft and spaced apart on the upper and lower sides of the eccentric block. The fixed shaft is fixed between the center positions of the upper shell and the lower cover. The permanent magnet is embedded through the eccentric block.

[0006] Preferably, the stator assembly includes a flexible circuit board, coils arranged in a figure-eight pattern on both sides of the flexible circuit board, and an iron core embedded in the coils.

[0007] Preferably, the coils are vertically bonded and fixed to the lower cover and respectively pasted to the outer surface of the baffle; the permanent magnets are correspondingly spaced between the coils.

[0008] Preferably, the center of the upper shell and the lower cover are respectively provided with a first shaft fixing part and a second shaft fixing part symmetrically protruding towards the accommodating space, and the ball bearings are respectively fixed in the first shaft fixing part and the second shaft fixing part.

[0009] Preferably, the eccentric block is in the shape of a cuboid, including a mounting hole extending through its thickness direction, a through hole extending through one of its long sides, and a clearance portion provided above and / or below the side of the eccentric block near the through hole; the permanent magnet is embedded in the mounting hole, and the fixed shaft is sleeved in the through hole.

[0010] Preferably, the flexible circuit board includes an internal power terminal and an external power terminal; the internal power terminal is provided with a positioning hole, which is sleeved on the second shaft fixing part.

[0011] Preferably, a shim is provided between the ball bearing and the eccentric block; the combined thickness of the ball bearing and the shim is greater than the height of the first shaft fixing part.

[0012] Preferably, the outer surface of the lower cover is covered with a dustproof sheet.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: the rotor assembly is confined between the baffles, and the magnetic field generated by the rotor assembly by switching the direction of the current supplied to the coil and the permanent magnet mutually attract and repel each other to generate reciprocating rotation, thereby realizing more diverse vibration modes and stronger vibration. Attached Figure Description

[0014] Figure 1 This is a bottom-view perspective view of this utility model.

[0015] Figure 2 This is a top-view perspective view of this utility model.

[0016] Figure 3 This is an exploded view of the structure of this utility model.

[0017] Figure 4 It is along Figure 2 Cross-sectional view of the vibration motor on line AA.

[0018] Figure 5 It is along Figure 4 Cross-sectional view of the vibration motor on the BB line.

[0019] Figure 6 This is an exploded view of the structure of the lower cover and stator assembly of this utility model.

[0020] Figure 7 This is an exploded view of the rotor assembly of this utility model.

[0021] in:

[0022] 1-Upper shell; 10-First bearing fixing part;

[0023] 2-Lower cover; 20-Second bearing fixing part;

[0024] 3-Rotor assembly; 30-Eccentric block; 31-Permanent magnet; 32-Fixed shaft; 33-Sliding bearing; 34-Shim;

[0025] 300 - Mounting hole; 301 - Clearance portion; 302 - Through hole;

[0026] 4-Stator assembly; 40-Flexible circuit board; 41-Coil; 42-Iron core;

[0027] 401 - Internal power connection terminal; 402 - External power connection terminal. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The structure of a rotary vibration motor is as follows Figures 1 to 7 As shown, the device includes a cylindrical upper shell 1 with one open end, a lower cover 2, a rotor assembly 3, and a stator assembly 4. The upper shell 1 and the lower cover 2 are fastened together to form an accommodating space (not shown). The stator assembly 4 and the rotor assembly 3 are fixedly spaced within the accommodating space. The rotor assembly 3 is fixed at the center position between the upper shell 1 and the lower cover 2. The stator assembly 4 is fixed on the inner surface of the lower cover 2. A first shaft fixing part 10 and a second shaft fixing part 20 are symmetrically protruding from the center positions of the upper shell 1 and the lower cover 2 towards the accommodating space, respectively. An interlocking V-shaped baffle 11 is integrally stamped on one side of the center position of the lower cover 2 to limit the rotor assembly 3. Since the baffle 11 is integrally stamped from the lower cover 2, a punching process cut (not shown) is left next to the baffle 11. Therefore, a dustproof sheet 5 is bonded and covered on the outer surface of the lower cover 2. The dustproof sheet 5 covers the process cut, thereby preventing external impurities from entering the accommodating space through the process cut during storage and transportation and affecting the performance of the vibration motor.

[0030] The structure of rotor assembly 3 is as follows Figure 7As shown, the device includes an eccentric block 30, a fixed shaft 32, a ball bearing 33, and a permanent magnet 31. The fixed shaft 32 is fixedly inserted through one side of the eccentric block 30. The ball bearing 33 is sleeved on the fixed shaft 32 and spaced apart on the upper and lower sides of the eccentric block 30. The fixed shaft 32 is fixed between the center positions of the upper shell 1 and the lower cover 2. The permanent magnet 31 is embedded through the eccentric block 30. The eccentric block 30 is generally rectangular and includes a mounting hole 300 penetrating its thickness direction, a through hole 302 penetrating one side of its long side, and a clearance portion 301 provided above and / or below the side of the eccentric block near the through hole. The permanent magnet 31 is embedded in the mounting hole 300, the fixed shaft 32 is sleeved in the through hole 302, and the clearance portion 301 is used to make way for the first shaft fixing portion 10 and / or the second shaft fixing portion 20. Eccentric blocks 30 are spaced between baffles 11, thus confining the rotor assembly 3 within the baffles 11. Ball bearings 33 are respectively fixed within the first shaft fixing part 10 and the second shaft fixing part 20, and the rotor assembly 3 rotates within the accommodating space around the fixed shaft 32 via the ball bearings 33. Preferably, a shim 34 is also provided between the ball bearings 33 and the eccentric blocks 30 to prevent severe wear and noise generation of the first bearing fixing part 10, the second bearing fixing part 20, or the eccentric blocks 30 due to the reciprocating rotation of the rotor assembly 3. At the same time, the thickness of the ball bearings 33 and the shim 34 is greater than the height of the first bearing fixing part 10 or the second bearing fixing part 20 to prevent severe wear and noise generation of the ball bearings 33 due to the reciprocating rotation of the rotor assembly 3, thereby ensuring the performance of the vibration motor.

[0031] The stator assembly 4 includes a flexible circuit board 40, coils 41 arranged in a figure-eight pattern on both sides of the flexible circuit board, and an iron core 42 embedded in the coils 41. The flexible circuit board 40 is bonded and fixed to the inner surface of the lower cover 2. The flexible circuit board 40 includes an internal power connection terminal (not shown) and an external power connection terminal (not shown). The internal power connection terminal has a positioning hole 400, which is fitted onto the second shaft fixing part 20 to facilitate the positioning of the flexible circuit board 40. When the vibration motor is installed in the end product (not shown), it prevents the flexible circuit board 40 from shifting due to pulling, thereby ensuring the power connection performance of the vibration motor. The internal power connection terminal is electrically connected to the coils 41. The external power connection terminal has an accommodating space and is electrically connected to an external power source. The coils 41 are vertically bonded and fixed to the lower cover 2 and respectively pasted to the outer surface of the baffle 21, thereby improving the assembly stability of the coils 41. The permanent magnets 31 are correspondingly spaced between the coils 41.

[0032] The working principle of the rotary vibration motor of this utility model is as follows:

[0033] When coil 41 is not energized, rotor assembly 3 is located between two baffles 21, and permanent magnet 31 with N and S poles is in any initial position. When coil 41 is energized, coil 41 generates a magnetic field, causing the S poles of the two coils 41 to attract the N pole on one side of the permanent magnet 31 in the initial position, thus driving rotor assembly 3 to rotate clockwise (e.g., ...). Figure 4 (As shown by the arrow in the image), when the eccentric block 30 touches the baffle 21, it switches the current direction of the coil 41 so that the two coils 41 form S poles respectively. The S poles on the other side of the magnet 31 attract each other, pushing the rotor assembly 3 to rotate counterclockwise, thereby forming the rotor assembly 3 to reciprocate around the fixed shaft 32, and the eccentric block 30 generates vibration.

[0034] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "horizontal direction", "vertical direction", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary vibration motor, comprising a cylindrical upper shell with one open end, a lower cover, a stator assembly, and a rotor assembly, wherein the upper shell and the lower cover are fastened together to form an accommodating space, and the stator assembly and the rotor assembly are fixedly spaced within the accommodating space, characterized in that, The rotor assembly is fixed at the center position between the upper shell and the lower cover; the stator assembly is fixed on the inner surface of the lower cover; the rotor assembly includes an eccentric block, and a spaced V-shaped baffle is integrally stamped on one side of the center position of the lower cover, with the eccentric block spaced between the baffles.

2. The rotary vibration motor according to claim 1, characterized in that, The rotor assembly also includes a fixed shaft, ball bearings and permanent magnets. The fixed shaft is fixedly inserted through one side of the eccentric block. The ball bearings are sleeved on the fixed shaft and spaced apart on the upper and lower sides of the eccentric block. The fixed shaft is fixed between the center positions of the upper shell and the lower cover. The permanent magnets are embedded through the eccentric block.

3. The rotary vibration motor according to claim 2, characterized in that, The stator assembly includes a flexible circuit board, coils arranged in a figure-eight pattern on both sides of the flexible circuit board, and an iron core embedded in the coils.

4. The rotary vibration motor according to claim 3, characterized in that, The coils are vertically bonded and fixed to the lower cover and respectively attached to the outer surface of the baffle; the permanent magnets are located at corresponding intervals between the coils.

5. The rotary vibration motor according to claim 4, characterized in that, The upper shell and the lower cover are respectively provided with a first shaft fixing part and a second shaft fixing part symmetrically protruding from the center of the accommodating space, and the ball bearings are respectively fixed in the first shaft fixing part and the second shaft fixing part.

6. The rotary vibration motor according to claim 5, characterized in that, The eccentric block is generally rectangular and includes a mounting hole extending through its thickness direction, a through hole extending through one of its long sides, and a clearance portion provided above and / or below the side of the eccentric block near the through hole; the permanent magnet is embedded in the mounting hole, and the fixed shaft is sleeved in the through hole.

7. The rotary vibration motor according to claim 5, characterized in that, The flexible circuit board includes an internal power terminal and an external power terminal; the internal power terminal is provided with a positioning hole, which is sleeved on the second shaft fixing part.

8. The rotary vibration motor according to claim 5, characterized in that, A shim is also provided between the ball bearing and the eccentric block; the combined thickness of the ball bearing and the shim is greater than the height of the first shaft fixing part.

9. The rotary vibration motor according to claim 1, characterized in that, The outer surface of the lower cover is covered with a dustproof sheet.

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