Vibration motor and electronic equipment

Abstract

The present invention belongs to the technical field of vibration devices, and specifically relates to a vibration motor and an electronic device having the vibration motor, wherein the vibration motor comprises a housing, a vibration unit, a damping member and a partition, wherein a housing is provided with a receiving space; the vibration unit is accommodated in the receiving space, and comprises a stator assembly having a coil and a vibrator assembly having a magnetic circuit system, wherein the stator assembly is suitable for driving the vibrator assembly to vibrate; the damping member is arranged between the vibrator assembly and the stator assembly along the vibration direction of the vibrator assembly; the partition is arranged between the damping member and the stator assembly, and has a first side surface and a second side surface which are opposite to each other, wherein the first side surface is connected to the coil, and the second side surface is connected to the damping member. The above structure prevents the damping member from being directly contacted by the coil through the partition, thereby reducing the influence of the increase in coil temperature on the damping member, and preventing the damping member from shrinking or melting due to high temperature and high size, thereby ensuring the service life of the vibration motor and its use experience.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration devices, and in particular relates to a vibration motor and an electronic device having the vibration motor. Background Art

[0002] A vibration motor is a component that converts electrical energy into mechanical energy using the principle of electromagnetic drive. Vibration motors are usually installed in portable mobile devices to generate vibration feedback.

[0003] Linear motors are widely used in mobile phones and other electronic devices due to their fast response and excellent vibration. In order to provide users with a better experience, the motor is often given ultra-high voltage and short-term excitation signals to achieve maximum vibration in the fastest cycle. However, under the excitation of high voltage, the coil temperature will rise sharply, which puts higher requirements on the structure and reliability of the motor itself. The foam of existing motor products is in direct contact with the coil. Under the excitation of high voltage, the coil temperature rises. If it works for a long time, the temperature will even rise to 180°C. High temperature will cause the foam size to shrink or even melt, which will reduce the service life of the vibration motor and worsen the user experience. Summary of the invention

[0004] The object of the present invention is to provide a vibration motor and an electronic device to solve the problem in the prior art that the damping member in the vibration motor is damaged due to the high temperature of the coil.

[0005] In one aspect, the present invention provides a vibration motor, comprising:

[0006] A housing, wherein a receiving space is provided in the housing;

[0007] a vibration unit, which is accommodated in the accommodation space and comprises a stator assembly having a coil and a vibrator assembly having a magnetic circuit system, wherein the stator assembly is suitable for driving the vibrator assembly to vibrate;

[0008] A damping member, the damping member is arranged between the vibrator assembly and the stator assembly along the vibration direction of the vibrator assembly;

[0009] The spacer is arranged between the damping member and the stator assembly and has a first side surface and a second side surface which are separated from each other. The first side surface is connected to the coil, and the second side surface is connected to the damping member.

[0010] The vibration motor provided by the present invention may also have the following additional technical features:

[0011] In a specific embodiment of the present invention, the partition frame includes a first plate having a first side, a second plate having a second side, and a connecting plate connecting the first plate and the second plate; the connecting plate is connected to the shell, or the first plate and the second plate are connected to the shell.

[0012] In a specific embodiment of the present invention, the first plate, the connecting plate and the second plate are connected in a U-shape, and the connecting plate is connected to the shell; or the first plate, the second plate and the second plate are connected in an H-shape, and the first plate and the connecting plate are connected to the shell.

[0013] In a specific embodiment of the present invention, the stator assembly also includes an iron core around which the coil is wound, and the two ends of the iron core are respectively bonded to the first side surfaces of the two partition frames; or the first plate is provided with a mounting groove, and the end of the iron core is inserted into the mounting groove.

[0014] In a specific embodiment of the present invention, the damping member is made of foam material, and there are two of them, and the two damping members are connected to the partition frames at the outer sides of the two partition frames respectively.

[0015] In a specific embodiment of the present invention, the vibrator assembly also includes two mass blocks suspended in sequence in the accommodation space along the vibration direction, and the magnetic circuit system includes two relatively arranged magnetic circuit structures, and the two ends of each of the magnetic circuit structures are respectively connected to the two mass blocks to form a central cavity that can accommodate the stator assembly, the damping element and the partition frame.

[0016] In a specific embodiment of the present invention, the magnetic circuit structure includes a first magnetic conductive plate, a second magnetic conductive plate, a central magnetic steel and side magnetic steels, the two ends of the first magnetic conductive plate are respectively connected to the two mass blocks, the second magnetic conductive plate is connected to the inner side of the first magnetic conductive plate, and along the vibration direction, the second magnetic conductive plate is provided with the central magnetic steel and two side magnetic steels located on both sides of the central magnetic steel.

[0017] In a specific embodiment of the present invention, grooves are provided on opposite sides of the two mass blocks, and the bottoms of the grooves are correspondingly connected to the damping members.

[0018] In a specific embodiment of the present invention, two stop blocks are further included in the accommodating space, the two stop blocks are respectively connected to the top walls of the shell at both ends of the vibrator assembly, and are suitable for stopping the two mass blocks of the vibrator assembly respectively.

[0019] Another aspect of the present invention provides an electronic device, comprising the vibration motor described in any one of the above.

[0020] Compared with the prior art, in the vibration motor provided by the present invention, a spacer is provided between the coil of the stator and the damping element to separate the coil and the damping element, thereby preventing the damping element from being directly contacted by the coil, thereby reducing the effect of the temperature increase of the coil due to high-voltage excitation on the damping element, and preventing the damping element from shrinking or melting due to high temperature, thereby ensuring the service life of the vibration motor and its usage experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 An exploded view of a vibration motor in a specific embodiment of the present invention;

[0023] Figure 2 A diagram showing the connection structure of a stator assembly, a spacer and a damping element in a specific implementation manner;

[0024] Figure 3 A diagram showing the connection structure of a stator assembly, a spacer and a damping element in another specific implementation manner;

[0025] Figure 4 for Figure 1 Schematic diagram of the combined structure of the middle part structure;

[0026] Figure 5 for Figure 4 The main view of

[0027] Figure 6 It is a schematic diagram of the structure of an elastic member in a specific implementation manner;

[0028] Figure 7 It is a schematic diagram of the magnetization direction of the magnetic circuit system in a specific implementation manner.

[0029] Description of reference numerals:

[0030] 100-vibration motor;

[0031] 10-housing, 11-open box body, 12-bottom wall;

[0032] 20-stator assembly, 21-coil, 22-iron core;

[0033] 30-vibrator assembly, 31-mass block, 32-magnetic circuit structure, 321-center magnetic steel, 322-side magnetic steel, 323-second magnetic conductive plate, 324-first magnetic conductive plate;

[0034] 40-damping element;

[0035] 50-partition frame, 51-first plate, 52-second plate, 53-connecting plate, 54-installation slot;

[0036] 60-elastic member, 61-spring sheet, 62-first connecting portion, 63-second connecting portion;

[0037] 70-Flexible printed circuit board. DETAILED DESCRIPTION

[0038] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0039] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0040] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0041] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0042] Please refer to Figure 1-7 The present invention provides a vibration motor 100, which is arranged in an electronic device and is used to provide vibration feedback for the electronic device.

[0043] Specifically, in a specific embodiment of the present invention, the vibration motor 100 includes a shell 10, a vibration unit, a damping member 40 and a partition frame 50, wherein the shell 10 is provided with a receiving space; the vibration unit is accommodated in the receiving space, and includes a stator assembly 20 having a coil 21 and a vibrator assembly 30 having a magnetic circuit system, and the stator assembly 20 is suitable for driving the vibrator assembly 30 to vibrate; the damping member 40 is arranged between the vibrator assembly 30 and the stator assembly 20 along the vibration direction of the vibrator assembly 30; the partition frame 50 is arranged between the damping member 40 and the stator assembly 20, and has a first side surface and a second side surface that are opposite to each other, the first side surface is connected to the coil 21, and the second side surface is connected to the damping member 40.

[0044] The housing 10 includes an open box body 11 and a bottom wall 12 adapted to the open box body 11, wherein the open box body 11 includes a bottom wall 12 arranged opposite to the bottom wall 12 and a side wall connecting the top wall and the bottom wall 12, and the top wall, the bottom wall 12 and the side wall cooperate to form a receiving space for accommodating the vibration unit, the damping member 40 and the partition frame 50. The side wall includes two parallel long sides arranged at intervals and two short sides arranged at both ends of the long sides and connecting the two long sides, and the long sides, the short sides and the top wall are an integrally formed structure.

[0045] The vibration unit includes a stator assembly 20 and a vibrator assembly 30 arranged relative to the stator assembly 20. Specifically, the stator assembly 20 is relatively fixed to the housing 10 and includes a coil 21. The vibrator assembly 30 is suspended in the housing 10 and includes a magnetic circuit system. When power is turned on, there is an electromagnetic force between the magnetic circuit system and the coil 21, and relative movement occurs under the drive of the electromagnetic force. When the current flowing through the coil 21 changes, the direction and strength of the electromagnetic force will also change, and the vibrator assembly 30 will reciprocate in the changing magnetic field. This movement can produce a vibration effect and be perceived by the user. In this embodiment, the vibration unit is set so that the vibrator assembly 30 vibrates in a direction parallel to the long side of the housing 10.

[0046] The damping member 40 is arranged between the vibrator assembly 30 and the stator assembly 20 along the vibration direction. On the one hand, it is suitable for buffering the vibration of the vibrator assembly 30 and reducing the vibration impact of the vibrator assembly 30. On the other hand, it is also suitable for absorbing the vibration energy of the vibrator assembly 30 to avoid excessive dissipation of energy, thereby accurately controlling the vibration performance of the vibration motor 100.

[0047] The spacer 50 is arranged between the stator assembly 20 and the damping member 40, and has a first side surface and a second side surface that are opposite to each other. The spacer 50 is respectively connected to the coil 21 and the damping member 40 through the first side surface and the second side surface that are opposite to each other, and can effectively isolate the coil 21 and the damping member 40, thereby reducing the impact of the increased temperature of the coil 21 under high voltage excitation on the damping member 40, and avoiding the damping member 40 from shrinking or melting due to high temperature, thereby extending the life of the vibration motor 100 and ensuring the consistency of the user experience.

[0048] In a specific embodiment of the present invention, the spacer 50 includes a first plate 51 having a first side surface, a second plate 52 having a second side surface, and a connecting plate 53 connecting the first plate 51 and the second plate 52, and the first plate 51, the connecting plate 53, and the second plate 52 are connected in a U-shape. Specifically, the spacer 50 is made of metal material, and there are two of them. The two spacers 50 are respectively arranged at both ends of the stator assembly 20, and are fixed to the bottom wall 12 by bonding or welding through the connecting plate 53. After the two spacers 50 are fixed, the two first plates 51 are located on the inner side, suitable for connecting to the stator assembly 20, and the two second plates 52 are located on the outer side, suitable for connecting to the damping member 40.

[0049] Of course, the connection method of the first plate 51, the second plate 52 and the connecting plate 53 is not limited to the above-mentioned U-type connection method, and H-type or other connection methods can also be adopted. At this time, the ends of the first plate 51 and the second plate 52 are glued or welded to the bottom wall 12.

[0050] In a specific embodiment of the present invention, the stator assembly 20 further includes an iron core 22 around which the coil 21 is wound, and the two ends of the iron core 22 are respectively bonded to the first side surfaces of the two spacers 50; or the first plate 51 is provided with a mounting groove 54, and the end of the iron core 22 is inserted into the mounting groove 54. The stator assembly 20 includes the iron core 22 and the coil 21 wound around the iron core 22, and is connected to the spacer 50 through the iron core 22 to be fixed to the bottom wall 12 of the housing 10. Specifically, the iron core 22 can be directly connected to the first side surface of the first plate 51 of the spacer 50 by bonding or welding, or can be mounted in the mounting groove 54 opened on the first plate 51 of the spacer 50. By connecting the stator assembly 20 to the spacer 50, on the one hand, the stator assembly 20 can be fixed to the housing 10, and on the other hand, the heat of the coil 21 can be transferred to the housing 10 through the spacer 50, thereby achieving heat dissipation of the vibration motor 100.

[0051] In a specific embodiment of the present invention, the damping member 40 is made of foam material and is two in number. The two damping members 40 are respectively connected to the second side surface of the second plate 52 of the partition frame 50 on the outside of the two partition frames 50, and are further separated from the coil 21 disposed on the inside of the two partition frames 50. Specifically, the damping member 40 can be fixedly abutted against the second side surface, or can be directly fixedly bonded to the second side surface.

[0052] In a specific embodiment of the present invention, the vibrator assembly 30 also includes two mass blocks 31 suspended in sequence in the receiving space along the vibration direction, and the magnetic circuit system includes two magnetic circuit structures 32 arranged opposite to each other, and the two ends of each magnetic circuit structure 32 are respectively connected to the two mass blocks 31, and form a central cavity that can accommodate the stator assembly 20, the damping member 40 and the partition frame 50. Further, the magnetic circuit structure 32 includes a first magnetic conductive plate 324, a second magnetic conductive plate 323, a central magnetic steel 321 and side magnetic steel 322, the two ends of the first magnetic conductive plate 324 are respectively connected to the two mass blocks 31, the second magnetic conductive plate 323 is connected to the inner side of the first magnetic conductive plate 324, and along the vibration direction, the second magnetic conductive plate 323 is provided with a central magnetic steel 321 and two side magnetic steels 322 located on both sides of the central magnetic steel 321.

[0053] Specifically, in the same magnetic circuit structure 32, along the vibration direction, the side magnetic steels 322 are attached to the second magnetic conductive plate 323 in a manner of being located at both ends of the central magnetic steel 321, and the magnetic field directions of the central magnetic steel 321 and the side magnetic steels 322 are opposite and both are perpendicular to the plane where the second magnetic conductive plate 323 is located; the two magnetic circuit structures 32 are arranged oppositely in a manner of being parallel to the second magnetic conductive plates 323, the central magnetic steel 321 and the side magnetic steels 322 are located between the two second magnetic conductive plates 323, and the magnetic field directions of the two opposite central magnetic steels 321 are opposite, thereby forming a magnetic structure. The second magnetic conductive plate 323 is welded to the inner surface of the first magnetic conductive plate 324, and the two ends of the first magnetic conductive plate 324 are respectively welded to the two mass blocks 31, thereby forming a complete vibrator assembly 30, and in the vibrator assembly 30, the opposite sides of the two mass blocks 31 are both in contact with the side magnetic steels 322, thereby forming a central cavity for accommodating the stator assembly 20.

[0054] In a specific embodiment of the present invention, two elastic members 60 are also included. The elastic member 60 includes a first connecting portion 62, a second connecting portion 63 and an elastic arm portion. The elastic arm portion includes two elastic sheets 61 connected in a U shape. The free ends of the two elastic sheets 61 are bent to the same side. The first connecting portion 62 is respectively connected to the mass block 31 and one elastic sheet 61, and the second connecting portion 63 is respectively connected to the shell 10 and another elastic sheet 61.

[0055] The free ends of the two spring pieces 61 are bent toward the same side, so that the first connection part 62 and the second connection part 63 respectively connected to the free ends of the two spring pieces 61 are substantially parallel to each other in the natural state. The two elastic members 60 are respectively arranged at the two ends of the vibrator assembly 30, and connect the mass and the housing 10 at the diagonal points of the vibrator assembly 30. Specifically, the two second connection parts 63 are respectively welded or bonded to the diagonal points of the two long sides of the side wall of the housing 10, and the two first connection parts 62 are respectively welded or bonded to the side surfaces of the two mass blocks 31 parallel to the two long sides, so that the vibrator assembly 30 is suspended in the housing 10 and can vibrate relative to the stator assembly 20.

[0056] In a specific embodiment of the present invention, grooves are provided on opposite sides of the two mass blocks 31 , and the bottoms of the grooves are correspondingly connected to the damping member 40 .

[0057] Specifically, in order to make the structure of the vibrator assembly 30 more compact, a plurality of avoidance portions are provided on the periphery of the mass block 31 to avoid the elastic member 60, the first magnetic conductive plate 324 and the damping member 40, and the grooves on the opposite sides of the mass block 31 are used to avoid the damping member 40, wherein the groove width is the same as the width between the two magnetic circuit structures 32, and the groove bottom is bonded to the damping member 40 accordingly.

[0058] In a specific embodiment of the present invention, the vibration motor 100 also includes two stop blocks arranged in the accommodating space, and the two stop blocks are respectively connected to the top walls of the shell 10 at both ends of the vibrator assembly 30, and are suitable for stopping the two mass blocks 31 of the vibrator assembly 30 respectively.

[0059] In a specific embodiment of the present invention, the vibration motor 100 further includes a flexible printed circuit board 70 disposed on the bottom wall 12 of the housing 10 , one end of the flexible printed circuit board 70 is connected to the coil 21 , and the other end thereof extends out of the housing 10 .

[0060] The present invention further provides an electronic device, which includes any one of the vibration motors 100 described above and can perform the functions of the vibration motor 100 to produce vibrations.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vibration motor, characterized in that: include: A housing, wherein a receiving space is provided in the housing; a vibration unit, which is accommodated in the accommodation space and comprises a stator assembly having a coil and a vibrator assembly having a magnetic circuit system, wherein the stator assembly is suitable for driving the vibrator assembly to vibrate; A damping member, the damping member is arranged between the vibrator assembly and the stator assembly along the vibration direction of the vibrator assembly; A spacer, disposed between the damping member and the stator assembly, and having a first side surface and a second side surface that are separated from each other, wherein the first side surface is connected to the coil, and the second side surface is connected to the damping member; The partition frame includes a first plate having a first side surface, a second plate having a second side surface, and a connecting plate connecting the first plate and the second plate; the connecting plate is connected to the shell, or the first plate and the second plate are connected to the shell.

2. The vibration motor according to claim 1, characterized in that: The first plate, the connecting plate and the second plate are connected in a U-shape, and the connecting plate is connected to the housing; or The first plate, the connecting plate, and the second plate are connected in an H-shape, and the first plate and the second plate are connected to the shell.

3. The vibration motor according to claim 1, characterized in that: The stator assembly also includes an iron core around which the coil is wound, and two ends of the iron core are respectively bonded to the first side surfaces of the two partitions; or a mounting groove is provided on the first plate, and the end of the iron core is inserted into the mounting groove.

4. The vibration motor according to claim 1, characterized in that: The damping member is made of foam material and is two in number. The two damping members are respectively connected to the partition frames at the outer sides of the two partition frames.

5. The vibration motor according to claim 1, characterized in that: The vibrator assembly also includes two mass blocks suspended in sequence in the accommodation space along the vibration direction, and the magnetic circuit system includes two magnetic circuit structures arranged opposite to each other, and the two ends of each magnetic circuit structure are respectively connected to the two mass blocks to form a central cavity that can accommodate the stator assembly, the damping element and the partition frame.

6. The vibration motor according to claim 5, characterized in that: The magnetic circuit structure includes a first magnetic conductive plate, a second magnetic conductive plate, a central magnetic steel and side magnetic steels. The two ends of the first magnetic conductive plate are respectively connected to the two mass blocks. The second magnetic conductive plate is connected to the inner side of the first magnetic conductive plate, and along the vibration direction, the second magnetic conductive plate is provided with the central magnetic steel and two side magnetic steels located on both sides of the central magnetic steel.

7. The vibration motor according to claim 5, characterized in that: Grooves are arranged on opposite sides of the two mass blocks, and the bottoms of the grooves are correspondingly connected to the damping members.

8. The vibration motor according to claim 5, characterized in that: It also includes two stop blocks arranged in the receiving space. The two stop blocks are respectively connected to the top walls of the shell at both ends of the vibrator assembly and are suitable for stopping the two mass blocks of the vibrator assembly respectively.

9. An electronic device, characterized in that: A vibration motor comprising any one of claims 1-8.

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