Vibrating motor and terminal device

Abstract

This disclosure provides a vibration motor and a terminal device, belonging to the field of electronic technology. The vibration motor includes a motor housing, an eccentric rotor assembly, at least two magnets, and a circuit board. The eccentric rotor assembly is located within the motor housing and rotatably connected to it. The at least two magnets are located within the motor housing, on both sides of the eccentric rotor assembly, and connected to the motor housing. The circuit board is connected to the motor housing and electrically connected to the eccentric rotor assembly. By employing this disclosure, the vibration motor incorporates at least two magnets, increasing the magnetic field strength at the eccentric rotor assembly, resulting in denser magnetic field lines, increasing the rotational speed of the eccentric rotor assembly, thereby improving the starting efficiency of the vibration motor, shortening its start-up time, and enhancing the usability of the terminal device.

Description

Technical Field

[0001] This disclosure relates to the field of electronic technology, specifically to a vibration motor and a terminal device. Background Technology

[0002] A vibration motor is a vibrating device in a terminal device. It is used in various scenarios of the terminal device. For example, the terminal device can vibrate when the user is typing, or when a call is received, etc.

[0003] Typically, a vibration motor includes a housing, an eccentric rotor assembly, magnets, and a circuit board. The circuit board supplies power to the eccentric rotor assembly, which drives the eccentric rotor assembly to rotate under the magnetic field of the magnets, thereby generating vibration.

[0004] However, when the aforementioned vibration motor is working, its start-up vibration time is relatively long, which will produce a sense of delay during application and result in poor performance. Utility Model Content

[0005] This disclosure provides a vibration motor and a terminal device, which can solve the technical problems existing in related technologies. The technical solution is as follows:

[0006] On one hand, this disclosure provides a vibration motor, which includes a motor housing, an eccentric rotor assembly, at least two magnets, and a circuit board;

[0007] The eccentric rotor assembly is located inside the motor housing and is rotatably connected to the motor housing;

[0008] The at least two magnets are located inside the motor housing, on both sides of the eccentric rotor assembly, and connected to the motor housing;

[0009] The circuit board is connected to the motor housing and is electrically connected to the eccentric rotor assembly.

[0010] In the technical solution provided in this disclosure, at least two magnets are provided in the vibration motor, which increases the magnetic field strength of the magnets at the eccentric rotor assembly, makes the magnetic field lines more dense, increases the rotational speed of the eccentric rotor assembly, thereby improving the starting efficiency of the vibration motor, shortening the starting time of the vibration motor, and improving the performance of the terminal equipment.

[0011] In some possible implementations, the magnet includes at least one pair of first permanent magnets and at least one pair of second permanent magnets, the first permanent magnets and the second permanent magnets being spaced apart, wherein the polarities of the first permanent magnets and the second permanent magnets are opposite.

[0012] In the technical solution provided in this disclosure, when the circuit board supplies power to the eccentric rotor assembly, the magnetic field generated by the first permanent magnet and the second permanent magnet can drive the eccentric rotor assembly to rotate.

[0013] When the magnet includes multiple pairs of first permanent magnets and multiple pairs of second permanent magnets, its magnetic field strength increases and the magnetic field lines become denser, thereby increasing the rotational speed of the eccentric rotor assembly and thus increasing the starting speed of the vibration motor.

[0014] In some possible implementations, the vibration motor further includes a brush, one end of which is connected and electrically connected to the circuit board, and the other end of which is electrically connected to the eccentric rotor assembly.

[0015] In the technical solution provided in this disclosure, the circuit board can achieve electrical connection with the eccentric rotor assembly through brushes, and can also achieve commutation of current in the eccentric rotor assembly through brushes, thereby realizing the rotation of the eccentric rotor assembly.

[0016] In some possible implementations, the eccentric rotor assembly includes an eccentric wheel and a coil connected together, the eccentric wheel being rotatably connected to the motor housing, and the coil being electrically connected to the other end of the brush.

[0017] In the technical solution provided in this disclosure, the circuit board supplies power to the coil through brushes. After being energized, the coil drives the eccentric wheel to rotate under the magnetic field of multiple magnets. Since the eccentric wheel is an eccentric structure, it will vibrate when it rotates, thereby achieving the vibration effect of the vibration motor.

[0018] In some possible implementations, the vibration motor further includes foam that is connected to the outer wall of the motor housing.

[0019] In the technical solution provided in this disclosure, the vibration motor can better transmit vibration to the terminal device through foam.

[0020] On the other hand, this disclosure provides a terminal device, the terminal device including a terminal housing and a vibration motor as described in any of the above claims, the vibration motor being located inside the terminal housing and connected to the terminal housing.

[0021] In the technical solution provided in this disclosure, at least two magnets are provided in the vibration motor, which increases the magnetic field strength of the magnets at the eccentric rotor assembly, makes the magnetic field lines more dense, increases the rotational speed of the eccentric rotor assembly, thereby improving the starting efficiency of the vibration motor, shortening the starting time of the vibration motor, and improving the performance of the terminal equipment.

[0022] In some possible implementations, the terminal device further includes a motherboard and a battery. The motherboard is electrically connected to the circuit board and the battery, respectively, and is used to control the battery to supply power to the circuit board to drive the eccentric rotor assembly to rotate and vibrate.

[0023] In the technical solution disclosed herein, the eccentric rotor assembly is powered by a battery controlled by a motherboard, thereby achieving the vibration effect.

[0024] In some possible implementations, the motherboard is used to control the battery to provide a preset high-level voltage for a first preset duration to the circuit board in response to a vibration start signal, so as to drive the eccentric rotor assembly to rotate and vibrate.

[0025] In the technical solution provided in this disclosure, while increasing the magnetic field strength by using at least two magnets, a battery is also used to provide a preset high-level voltage to the circuit board. Compared with the low-level voltage in related technologies, the preset high-level voltage in this disclosure increases the magnetic field strength of the eccentric rotor assembly, thereby increasing the rotational speed of the eccentric rotor assembly and shortening the start-up time of the vibration motor.

[0026] In some possible implementations, the motherboard is also used to control the battery to provide a preset reverse voltage to the circuit board for a second preset duration in response to a vibration stop signal.

[0027] In the technical solution provided in this disclosure, when the vibration motor is controlled to stop vibrating, a preset reverse voltage is provided to it, so that the current of the eccentric rotor assembly is reversed. In this way, under the action of the magnetic field, a force opposite to the rotation direction is applied to the eccentric rotor assembly, so that the eccentric rotor assembly stops rotating quickly, shortens its vibration stop time, increases the gap time between each vibration when vibrating continuously, and improves the sense of gap between each vibration.

[0028] In some possible implementations, the motherboard is also configured to recover energy from the vibration motor in response to a vibration stop signal in order to charge the battery.

[0029] In the technical solution provided in this disclosure, during the process of the vibration motor stopping vibration, the eccentric rotor assembly will stop rotating after a certain period of time due to inertia. At this time, the mechanical energy of the eccentric rotor assembly can be converted into electrical energy, thereby recovering energy to charge the battery, making full use of resources and reducing resource waste.

[0030] The technical solution provided in this disclosure includes at least the following beneficial effects:

[0031] This disclosure provides a vibration motor in which at least two magnets are provided, which increases the magnetic field strength of the magnets at the eccentric rotor assembly, makes the magnetic field lines denser, increases the rotational speed of the eccentric rotor assembly, thereby improving the starting efficiency of the vibration motor, shortening the start-up time of the vibration motor, and improving the performance of the terminal equipment.

[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a vibration motor shown in an embodiment of this disclosure;

[0035] Figure 2 This is a schematic diagram of the exploded structure of a vibration motor according to an embodiment of the present disclosure;

[0036] Figure 3 This is a schematic cross-sectional view of a vibration motor according to an embodiment of this disclosure;

[0037] Figure 4 This is a schematic diagram of the structure of a magnet shown in an embodiment of this disclosure;

[0038] Figure 5 This is a schematic diagram of the structure of a magnet shown in an embodiment of this disclosure;

[0039] Figure 6 This is a schematic diagram of the magnetic field when a low-level voltage is provided to an eccentric rotor assembly.

[0040] Figure 7 This is a schematic diagram of the magnetic field when a preset high-level voltage is provided to an eccentric rotor assembly, as shown in an embodiment of this disclosure;

[0041] Figure 8 This is a schematic diagram of a single vibration event of a vibration motor in related technologies;

[0042] Figure 9 This is a schematic diagram illustrating a single vibration of a vibration motor in a terminal device according to an embodiment of this disclosure.

[0043] Legend

[0044] 1. Motor housing; 11. Lower housing; 12. Upper housing;

[0045] 2. Eccentric rotor assembly; 21. Eccentric wheel; 22. Coil;

[0046] 3. Magnet; 31. First permanent magnet; 32. Second permanent magnet;

[0047] 4. Circuit board;

[0048] 5. Brushes;

[0049] 6. Foam;

[0050] 7. Shaft;

[0051] 8. Slider;

[0052] 9. Adhesive backing. Detailed Implementation

[0053] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” encompasses the element or object listed following “comprising” or “including” and its equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0054] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0055] This disclosure provides a vibration motor, see [link to relevant documentation] Figure 1 and Figure 2 The vibration motor includes a motor housing 1, an eccentric rotor assembly 2, at least two magnets 3, and a circuit board 4; see also Figure 3 The eccentric rotor assembly 2 is located inside the motor housing 1 and is rotatably connected to the motor housing 1; at least two magnets 3 are located inside the motor housing 1, on both sides of the eccentric rotor assembly 2, and are connected to the motor housing 1; the circuit board 4 is connected to the motor housing 1 and is electrically connected to the eccentric rotor assembly 2.

[0056] In implementation, see Figure 2 and Figure 3 The motor housing 1 may include a lower housing 11 and an upper housing 12, which are connected to form a receiving space between them for accommodating and protecting other components of the vibration motor.

[0057] See Figure 3 The eccentric rotor assembly 2 is located within the housing space and is rotatably connected to the housing 1 via the rotating shaft 7. Figure 3 It can be seen that the eccentric rotor assembly 2 has an eccentric structure.

[0058] The lower housing 11 has a rotating shaft groove on the side near the magnet 3, and one end of the rotating shaft 7 is located in the rotating shaft groove, which can rotate relative to the inner wall of the rotating shaft groove.

[0059] The vibration motor may also include a slide plate 8, which is located between the other end of the rotating shaft 7 and the upper housing 12. The eccentric rotor assembly 2 has a rotor slot, through which the other end of the rotating shaft 7 passes and abuts against the slide plate 8. The slide plate 8 can fix the rotating shaft 7 when the eccentric rotor assembly 2 rotates, thereby improving the stability of the vibration motor.

[0060] The magnets 3 are all located in the receiving space and connected to the housing 1. These multiple magnets 3 can be respectively arranged on both sides of the eccentric rotor assembly 2.

[0061] Circuit board 4 may be partially located within the housing space, this portion for electrical connection with the eccentric rotor assembly 2. Another portion of circuit board 4 is located outside the housing 1, see [reference needed]. Figure 1 The portion located outside the housing 1 is used for electrical connection with the motherboard of the terminal device.

[0062] When the vibration motor starts, the terminal device supplies power to the eccentric rotor assembly 2 through the circuit board 4. Current flows through the eccentric rotor assembly 2. At this time, the eccentric rotor assembly 2 will be subjected to force in the magnetic field generated by multiple magnets 3, thereby driving the eccentric rotor assembly 2 to rotate. During the rotation of the eccentric rotor assembly 2, it will vibrate due to its eccentric structure, thus realizing the vibration effect of the vibration motor.

[0063] In this embodiment of the disclosure, the vibration motor is provided with at least two magnets 3, which increases the magnetic field strength of the magnets 3 at the eccentric rotor assembly 2, makes the magnetic field lines more dense, increases the rotational speed of the eccentric rotor assembly 2, thereby improving the starting efficiency of the vibration motor, shortening the starting time of the vibration motor, and improving the performance of the terminal device.

[0064] See also some possible implementations. Figure 4The magnet 3 includes at least one pair of first permanent magnets 31 and at least one pair of second permanent magnets 32, the first permanent magnets 31 and the second permanent magnets 32 are arranged at intervals, wherein the polarities of the first permanent magnets 31 and the second permanent magnets 32 are opposite.

[0065] In practice, when the circuit board 4 supplies power to the eccentric rotor assembly 2, the magnetic field generated by the first permanent magnet 31 and the second permanent magnet 32 ​​can drive the eccentric rotor assembly 2 to rotate.

[0066] See Figure 4 The magnet 3 may include a pair of first permanent magnets 31 and a pair of second permanent magnets 32.

[0067] Or see Figure 5 The magnet 3 may include multiple pairs of first permanent magnets 31 and multiple pairs of second permanent magnets 32. When the magnet 3 includes multiple pairs of first permanent magnets 31 and multiple pairs of second permanent magnets 32, its magnetic field strength increases and the magnetic field lines become denser, thereby increasing the rotational speed of the eccentric rotor assembly 2 and thus increasing the starting speed of the vibration motor.

[0068] It is understandable that a pair of first permanent magnets 31 refers to two first permanent magnets 31, and a pair of second permanent magnets 32 refers to two second permanent magnets 32.

[0069] See also some possible implementations. Figure 2 and Figure 3 The vibration motor also includes a brush 5, one end of which is connected to the circuit board 4 and electrically connected, and the other end of which is electrically connected to the eccentric rotor assembly 2.

[0070] In practice, the circuit board 4 can achieve electrical connection with the eccentric rotor assembly 2 through the brush 5, and can also achieve commutation of current in the eccentric rotor assembly 2 through the brush 5, thereby realizing the rotation of the eccentric rotor assembly 2.

[0071] Furthermore, the eccentric rotor assembly 2 includes an eccentric wheel 21 and a coil 22 connected together. The eccentric wheel 21 is rotatably connected to the motor housing 1, and the coil 22 is electrically connected to the other end of the brush 5.

[0072] In practice, the circuit board 4 supplies power to the coil 22 through the brush 5. After being energized, the coil 22 drives the eccentric wheel 21 to rotate under the magnetic field of multiple magnets 3. Since the eccentric wheel 21 is an eccentric structure, it will vibrate when it rotates, thereby achieving the vibration effect of the vibration motor.

[0073] See also some possible implementations. Figure 2 and Figure 3 The vibration motor also includes foam 6, which is connected to the outer wall of the motor housing 1. In this way, the vibration motor can better transmit vibration to the terminal device through the foam 6.

[0074] This disclosure also provides a terminal device, which includes a terminal housing and a vibration motor as described in any of the above embodiments. The vibration motor is located inside the terminal housing and is connected to the terminal housing.

[0075] In practice, when the terminal device is in a scenario that requires vibration, such as typing or receiving a call, the vibration motor vibrates and transmits the vibration effect to the terminal casing, so that the user can feel the vibration.

[0076] Furthermore, since at least two magnets 3 are installed in the vibration motor, the magnetic field strength of the magnets 3 at the eccentric rotor assembly 2 is increased, the magnetic field lines are more dense, the rotational speed of the eccentric rotor assembly 2 is increased, thereby improving the starting efficiency of the vibration motor, shortening the starting time of the vibration motor, and improving the performance of the terminal equipment.

[0077] In some possible implementations, the vibration motor may also include an adhesive backing 9, which is located at one end of the motor housing 1 and connected to the motor housing 1. The vibration motor can be connected to the terminal housing through the adhesive backing 9.

[0078] The vibration motor can be located at any position in the terminal housing. For example, the vibration motor can be connected to the middle frame in the terminal housing, etc. The embodiments disclosed herein do not limit this.

[0079] In some possible implementations, the terminal device also includes a motherboard and a battery. The motherboard is electrically connected to the circuit board 4 and the battery, respectively, and is used to control the battery to supply power to the circuit board 4 to drive the eccentric rotor assembly 2 to rotate and vibrate.

[0080] In practice, the terminal device can control the battery through the motherboard to power the eccentric rotor assembly 2, thereby achieving the vibration effect.

[0081] In some possible implementations, the motherboard is used to control the battery to provide a preset high-level voltage for a first preset duration to the circuit board 4 in response to a vibration start signal, so as to drive the eccentric rotor assembly 2 to rotate and vibrate.

[0082] In practice, while increasing the magnetic field strength by using at least two magnets 3, a battery is also used to provide a preset high-level voltage to the circuit board 4 and the eccentric rotor assembly 2. Compared with the low-level voltage in related technologies, the preset high-level voltage in this disclosure increases the magnetic field strength of the eccentric rotor assembly 2, thereby increasing the rotational speed of the eccentric rotor assembly 2 and shortening the start-up time of the vibration motor.

[0083] See Figure 6 and Figure 7 , Figure 6 It is the magnetic field generated by the eccentric rotor assembly 2 when using a low-level voltage. Figure 7 It is the magnetic field generated by the eccentric rotor assembly 2 when a preset high-level voltage is used, which can be clearly seen. Figure 7 The magnetic field lines are denser and the magnetic field strength is higher, which effectively shortens the start-up time of the vibration motor.

[0084] In this embodiment of the disclosure, the preset high-level voltage can be a reasonable high-level voltage that the terminal device can provide, such as 5V, 6V, 7V, etc. It can be set according to the actual situation and needs, and this embodiment of the disclosure does not limit it.

[0085] The first preset duration can be any reasonable duration, determined according to the required vibration duration, such as 20ms, 40ms, etc.

[0086] In some possible implementations, the motherboard is also used to control the battery to provide a preset reverse voltage to the circuit board 4 for a second preset duration in response to a vibration stop signal.

[0087] In practice, when the terminal device controls the vibration motor to stop vibrating, the main board of the terminal device can provide a reverse voltage to the circuit board 4, i.e., a preset reverse voltage. Thus, through the circuit board 4, a preset reverse voltage is provided to the eccentric rotor assembly 2, so that the current of the eccentric rotor assembly 2 is reversed. In this way, under the action of the magnetic field, a force opposite to the rotation direction is applied to the eccentric rotor assembly 2, so that the eccentric rotor assembly 2 stops rotating quickly, shortens its vibration stopping time, increases the gap time between each vibration when there are multiple consecutive vibrations (especially multiple consecutive short vibrations), and improves the sense of gap between each vibration.

[0088] See Figure 8 and Figure 9 , Figure 8 The diagram illustrates a single vibration event of a vibration motor in a terminal device of the related art. Figure 9 The illustration shows the vibration of the vibration motor in this embodiment under the action of a preset high-level voltage and a preset reverse voltage. It can be clearly seen that the start-up time and stop time of the vibration motor in the terminal device proposed in this embodiment are both shorter, thereby increasing the interval time between each vibration when there are multiple consecutive vibrations.

[0089] In the embodiments of this disclosure, the preset reverse voltage value can be any reasonable value, such as 3V, 5V, 7V, etc., and can be set according to actual conditions and needs. The embodiments of this disclosure do not limit this.

[0090] The second preset duration can be any reasonable duration, determined according to the requirement for the duration of vibration cessation, for example, it can be 10ms, 20ms, etc.

[0091] In some possible implementations, the motherboard is also used to recover energy from the vibration motor in response to a vibration stop signal in order to charge the battery.

[0092] During implementation, when the vibration motor stops vibrating, the eccentric rotor assembly 2 will rotate for a period of time before stopping due to inertia. At this time, the main board can convert the mechanical energy of the eccentric rotor assembly 2 into electrical energy, thereby recovering energy to charge the battery, making full use of resources and reducing waste.

[0093] The technical solution provided in this disclosure includes at least the following beneficial effects:

[0094] This disclosure provides a vibration motor in which at least two magnets 3 are provided, which increases the magnetic field strength of the magnets 3 at the eccentric rotor assembly 2, makes the magnetic field lines more dense, increases the rotational speed of the eccentric rotor assembly 2, thereby improving the starting efficiency of the vibration motor, shortening the starting time of the vibration motor, and improving the performance of the terminal equipment.

[0095] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A vibration motor, characterized in that, The vibration motor includes a motor housing (1), an eccentric rotor assembly (2), at least two magnets (3), and a circuit board (4); The eccentric rotor assembly (2) is located inside the motor housing (1) and is rotatably connected to the motor housing (1); The at least two magnets (3) are located inside the motor housing (1), on both sides of the eccentric rotor assembly (2), and are connected to the motor housing (1); The circuit board (4) is connected to the motor housing (1) and electrically connected to the eccentric rotor assembly (2).

2. The vibration motor according to claim 1, characterized in that, The magnet (3) includes at least one pair of first permanent magnets (31) and at least one pair of second permanent magnets (32), the first permanent magnets (31) and the second permanent magnets (32) are arranged at intervals, wherein the polarities of the first permanent magnets (31) and the second permanent magnets (32) are opposite.

3. The vibration motor according to claim 1, characterized in that, The vibration motor also includes a brush (5), one end of which is connected to the circuit board (4) and electrically connected, and the other end of which is electrically connected to the eccentric rotor assembly (2).

4. The vibration motor according to claim 3, characterized in that, The eccentric rotor assembly (2) includes an eccentric wheel (21) and a coil (22) connected together. The eccentric wheel (21) is rotatably connected to the motor housing (1), and the coil (22) is electrically connected to the other end of the brush (5).

5. The vibration motor according to claim 1, characterized in that, The vibration motor also includes foam (6), which is connected to the outer wall of the motor housing (1).

6. A terminal device, characterized in that, The terminal device includes a terminal housing and a vibration motor as described in any one of claims 1 to 5, wherein the vibration motor is located inside the terminal housing and connected to the terminal housing.

7. The terminal device according to claim 6, characterized in that, The terminal device also includes a motherboard and a battery. The motherboard is electrically connected to the circuit board (4) and the battery, respectively, and is used to control the battery to supply power to the circuit board (4) to drive the eccentric rotor assembly (2) to rotate and vibrate.

8. The terminal device according to claim 7, characterized in that, The mainboard is used to respond to the vibration start signal and control the battery to provide a preset high-level voltage for a first preset duration to the circuit board (4) so ​​as to drive the eccentric rotor assembly (2) to rotate and vibrate.

9. The terminal device according to claim 7, characterized in that, The motherboard is also used to control the battery to provide a preset reverse voltage for a second preset duration to the circuit board (4) in response to a vibration stop signal.

10. The terminal device according to claim 7, characterized in that, The motherboard is also used to recover energy from the vibration motor in response to a vibration stop signal in order to charge the battery.

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