CN209982301U - Exciter and electronic product - Google Patents

Abstract

The utility model discloses an exciter and an electronic product, wherein the exciter comprises a vibrator component, a stator component and an elastic element; the vibrator component is configured to be connected with external equipment and drive the external equipment to vibrate, the vibrator component comprises a first shell and a vibrator fixed on the first shell, the vibrator is one of a coil or a magnet group, the magnet group comprises two magnets which are mutually connected and have perpendicular magnetic pole directions, and the magnet group is arranged on at least one side of the coil along the axial direction; the stator component comprises the other one of a coil or a magnet group, the magnet group and the coil enable the vibrator component to vibrate through electromagnetic action, and the axis of the coil is perpendicular to the vibration direction of the vibrator component; the elastic element is connected with the vibrator assembly and the stator assembly respectively.

Description

Exciter and electronic product

Technical Field

The utility model discloses electronic product technical field specifically relates to an exciter and electronic product.

Background

Sound generators are important electroacoustic transducer elements in electronic products for converting current signals into sound. Along with the rapid development of electronic products in recent years, sound generating devices applied to the electronic products have been improved correspondingly.

A conventional sound generating device for a mobile phone handset is a Receiver (Receiver), which adopts the principle that a vibrating diaphragm pushes air to vibrate and generate sound. In recent years, as a full screen becomes a main development direction of a mobile phone, how to realize a receiver function under a screen non-opening design and have better listening experience is a current technical problem. In this regard, those skilled in the art have developed a technical solution for sounding by using screen vibration.

Electromagnetic actuators for driving screen sounds are generally classified into resonant type actuators and direct drive type actuators. The direct-drive exciter can directly drive the screen to vibrate and sound, and compared with the resonant exciter, the vibration mode of the direct-drive exciter can reduce energy loss in the vibration process. The direct-drive type exciter can be divided into an integrated type and a split type, and the existing integrated direct-drive exciter is provided with a single magnet at one side of a coil, so that the utilization rate of a magnetic field is very limited; in order to increase the magnetic field density and improve the magnetic field utilization efficiency, a new technical scheme needs to be provided.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a new technical solution for an exciter and an electronic product.

According to a first aspect of the present invention, there is provided an exciter, comprising:

the magnetic coil comprises a coil and a magnet group, wherein the magnet group comprises two magnets which are mutually connected and have perpendicular magnetic pole directions, and the magnet group is arranged on at least one side of the coil along the axial direction;

the vibrator assembly is configured to be connected with an external device and drive the external device to vibrate, the vibrator assembly comprises a first shell and a vibrator fixed on the first shell, and the vibrator is one of a coil or a magnet group;

a stator assembly comprising the other of a coil or a set of magnets;

the magnet group and the coil generate vibration for the vibrator component through electromagnetic action, and the axis of the coil is perpendicular to the vibration direction of the vibrator component;

a resilient element connected with the vibrator assembly and the stator assembly, respectively.

Optionally, the exciter comprises two of the magnet sets, the two magnet sets are oppositely arranged on two sides of the coil, and a magnetic field is formed between the two magnet sets.

Optionally, one of the magnet groups includes a first magnet and a second magnet, where a magnetic pole direction of the first magnet is: the S pole is close to the coil, and the N pole is far away from the coil; the magnetic pole direction of the second magnet is as follows: the S pole is close to the first magnet, and the N pole is far away from the first magnet;

another magnet group includes third magnet and fourth magnet, and wherein the magnetic pole direction of third magnet is: the N pole is close to the coil, and the S pole is far away from the coil; the magnetic pole direction of the fourth magnet is as follows: the N pole is close to the third magnet, and the S pole is far away from the third magnet.

Optionally, the elastic element is a spring plate; the elastic sheet comprises a fixed rod and at least one cantilever extending out of the fixed rod, the fixed rod is connected to the vibrator assembly, and one end, extending out of the cantilever, of the cantilever is connected to the stator assembly.

Optionally, the elastic element is an elastic wave, one end of the elastic wave is connected with the vibrator component, and the other end of the elastic wave is connected with the stator component.

Optionally, the magnetic conduction plate is further included, and the magnetic conduction plate is covered on an end face of one end of the magnet group along the vibration direction of the vibrator assembly.

Optionally, the stator assembly further includes a second housing, and one of the coils or the magnet group belonging to the stator assembly is fixedly connected to the second housing.

Optionally, the first housing is a tubular structure having a bottom wall, one side opposite to the bottom wall is an open end, the vibrator is a magnet set, the magnet set is fixedly connected with the first housing, and the coil extends into the first housing from the open end.

Optionally, the first casing is made of a magnetic conductive material.

Optionally, an avoiding hole is formed in the middle of the bottom wall of the first shell.

According to the utility model discloses an on the other hand provides an electronic product, include:

an actuator as described above;

a fixed part connected with a stator assembly of the exciter;

a vibrating portion configured to be vibratable relative to the fixing portion, the vibrating portion being connected to a first housing of an exciter.

The utility model discloses a set up at least one magnet group in one side of coil, every magnet group includes two blocks of magnet of magnetic pole direction looks vertically, can improve the effective utilization ratio of line is felt to magnetism.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is an exploded schematic view of an exciter according to the present invention;

fig. 2 is a schematic cross-sectional view of an embodiment of an exciter according to the present invention;

fig. 3 is a schematic structural diagram of a spring plate in an actuator according to the present invention;

fig. 4 is a schematic cross-sectional view of another embodiment of an actuator according to the present invention;

fig. 5 is a schematic structural diagram of an electronic product according to the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

An embodiment of the utility model provides an exciter, this exciter is used in electronic product for drive electronic product's at least part is relative to the fixed part vibration sound production. The exciter comprises a vibrator assembly configured for connection with a portion of the electronic product intended for vibration, for example, for bringing a screen of the electronic product and/or a rear cover 3 disposed opposite the screen into vibration sound, as will be described in detail below by way of example with reference to the screen 2. The fixing portion 4 may be a fixing member of an electronic product to which the actuator is applied, or may be a separately disposed fixed component.

Referring to fig. 1 to 4, the vibrator assembly includes a first housing 11 and a vibrator fixedly disposed on the first housing 11, where the vibrator is one of a coil 12 or a magnet set, and the magnet set includes two magnets connected to each other and having perpendicular magnetic pole directions; the exciter further comprises a stator assembly, wherein the stator assembly comprises the other one of the coil 12 or the magnet group, a through hole is formed in the middle of the coil 12, the coil 12 is wound by a conducting wire along one direction to form a closed annular structure, a wiring area of the coil 12 is arranged around the through hole in the middle of the coil, the wiring area refers to an area through which a lead wire in the coil 12 actually passes, and the whole wiring area is annular. The magnet group is located on at least one side of the coil 12 in the axial direction, as shown in fig. 2. The magnet group and the coil 12 generate vibration for the vibrator component through electromagnetic action, and the axis of the coil 12 is perpendicular to the vibration direction of the vibrator component; the exciter further comprises elastic elements respectively connected with the vibrator assembly and the stator assembly, and the elastic elements are used for providing restoring force for vibration of the vibrator assembly. In addition, the stator assembly and the vibrator assembly are connected into an integral structure by the elastic element, so that the exciter is an integral exciter which has the advantages of high whole machine assembly precision and high magnetic field utilization efficiency compared with a split exciter.

Referring to the embodiment shown in fig. 1 and 2, the first housing 11 is a cylindrical structure having a bottom wall, one side opposite to the bottom wall is an open end, the vibrator is a magnet set, and the stator assembly includes a coil 12. The magnet group is used as a vibrator and fixedly connected with the first shell 11, the first shell 11 is connected with a screen of an electronic product, the coil 12 is used as one part of the stator component and positioned on the side surface of the magnet group and extends into the stator component from the opening end of the first shell 11, and the stator component containing the coil 12 is connected with a fixing part of the electronic product. The axis of the coil 12 is perpendicular to the direction of vibration of the magnet assembly, i.e. the axis of the coil 12 is parallel to the surface of the screen 2. The routing areas of the coil 12 include a first routing area 121 close to the first housing 11 and a second routing area 122 far from the first housing 11. The routing directions of the first routing area 121 and the second routing area 122 are parallel to the surface of the screen 2. The magnet assembly is capable of generating a magnetic field, and at least one of the first trace area 121 and the second trace area 122 is configured to pass through the magnetic field generated by the magnet assembly. When the current signal passed through the coil 12 is an alternating signal, an ampere force can be generated between the coil 12 and the magnet groups, and the directions of the generated ampere force are alternately changed in opposite directions, because the magnet groups are arranged on the side surfaces of the coil 12, a part of the magnetic field generated by the magnet groups can cross the coil 12 in the direction parallel to the axis of the coil 12, and further, the ampere force in the direction vertical to the surface of the screen is generated. The alternating oppositely varying ampere force can be transmitted directly to the screen through a vibrator assembly comprising a magnet assembly and the first housing 11. That is to say, the vibrator component can directly drive the screen to vibrate after receiving ampere force. The ampere force can enable the screen and the fixed part to generate relative displacement, and further enable the screen to vibrate and generate sound relative to the fixed part. Stator module including coil 12 and the vibrator subassembly that includes magnet group and first casing 11 directly set up respectively on fixed part and screen, directly form the drive to the screen, have guaranteed efficient vibration transmission efficiency. The direct driving method of directly connecting the portion (for example, screen) for vibration of the electronic product with the vibrator assembly simplifies the principle of driving the screen to vibrate, the screen can directly generate vibration after being subjected to ampere force, and the design method effectively improves the vibration conversion efficiency. In addition, because the coil 12 generates a large amount of heat after current is introduced, the magnet group is preferably used as a vibrator, and the coil 12 is preferably used as a part of the stator assembly, so that the coil 12 is not connected with the screen, and the screen is prevented from being damaged due to heat generated by the coil 12; the outer bottom wall of the first casing 11 directly connected to the screen is connected to the magnet set which does not generate heat, so that the first casing 11 does not transfer heat to the screen while vibrating the screen.

In the prior art, only one magnet is arranged on one side of a coil, if the magnetic field density is to be increased, the size of a single magnet can be increased, and the magnetic induction line may exceed the wiring area of the coil after the size of the single magnet is increased, so that the effective utilization rate of the magnetic induction line is not high, the contribution of increasing the size of the single magnet to the increase of the magnetic field density is very limited, and the utilization efficiency of the magnetic field cannot be effectively improved. In an embodiment of the present invention, the exciter is provided with a magnet set having two magnets, and the magnetic pole directions of the two magnets are perpendicular to each other, and the magnetic pole of one of the magnets faces the coil.

In one embodiment, the actuator includes two magnet sets, the two magnet sets are oppositely arranged on two sides of the coil 12, a gap is arranged between the coil 12 and the magnet sets on two sides, and a magnetic field is formed between the two magnet sets. The magnetic field stability, symmetry, the magnetic field intensity that adopt two magnet groups to produce are better for ampere power that produces between coil 12 and the magnet group is stronger, the difficult slope scheduling problem that appears in the direction of ampere force, makes the vibration effect of screen more stable. Further, by providing two magnet groups, the magnetic field formed between the two magnet groups is more concentrated and the magnetic field intensity is stronger than the magnetic field formed on the side closer to the coil 12 by one magnet group, and the magnetic field utilization efficiency is higher.

Referring to fig. 2, when two magnet sets are provided, one embodiment of the magnet arrangement is:

one of the magnet sets includes a first magnet 13 and a second magnet 14, wherein the magnetic pole direction of the first magnet 13 is: the S pole is close to the coil 12, and the N pole is far from the coil 12; the magnetic pole directions of the second magnet 14 are: the S pole is close to the first magnet 13, and the N pole is far from the first magnet 13; the other magnet group includes a third magnet 15 and a fourth magnet 16, wherein the magnetic pole direction of the third magnet 15 is: the N pole is close to the coil 12, and the S pole is far from the coil 12; the magnetic pole direction of the fourth magnet 16 is: the N pole is close to the third magnet 15 and the S pole is far from the third magnet 15.

The embodiment in which the magnet assembly includes two magnets, and one of the magnets has a magnetic pole oriented toward the coil will be described with reference to the embodiment shown in fig. 2.

The magnet group on the right side of the coil 12 includes a first magnet 13 and a second magnet 14, and the magnet group on the left side includes a third magnet 15 and a fourth magnet 16. The north pole of the second magnet 14, the south pole of the second magnet, the south pole of the first magnet, and the south pole of the fourth magnet 16 all form a magnetic field, and the magnetic field generated between these poles passes through the second trace area 122 of the coil 12. And, the magnetic induction line direction of the magnetic field is nearly perpendicular to the second trace area 122 of the coil 12. On the other hand, the S-pole of the first magnet 13 and the S-pole of the second magnet 14 repel each other, so that the magnetic field generated by the S-pole of the first magnet 13 is forced to radiate to the left side and pass through the first trace area 121 of the coil 12. A strong magnetic field can be formed between the S-pole of the first magnet 13 and the N-pole thereof, between the N-pole of the second magnet 14, and between the N-pole of the third magnet 15. The magnetic field passes through the first track area 121 of the coil 12 approximately perpendicular to said first track area 121.

As can be seen from the above description, the magnet assembly of the dual-magnet type can generate a strong magnetic field extending approximately vertically on one side of the coil, so as to improve the utilization rate of the magnetic field and increase the magnetic field intensity, regardless of whether the magnet assembly is disposed on only one side of the coil or both sides of the coil.

In the embodiment where the first housing 11 is a cylindrical structure, as shown in fig. 1 and 2, the stator assembly may further include a second housing 19. The second housing 19 is disposed opposite to the open end of the first housing 11, and one of the coils 12 or the magnet group belonging to the stator assembly is fixedly connected to the second housing 19. In the embodiment shown in fig. 2, the coil 12 is fixedly connected to the inner surface of the second housing 19, and the outer surface of the second housing 19 is used for connecting to the fixed portion of the electronic product. In one embodiment, the first casing 11 is made of a magnetic conductive material, and magnetic leakage can be reduced by selecting the magnetic conductive first casing. In an alternative embodiment, as shown in fig. 2, an avoiding hole 111 is formed in the middle of the bottom wall of the first housing 11. The avoidance hole 111 is formed at a position corresponding to the coil 12, and the coil 12 may extend out of the first housing 11 from the avoidance hole 111. The design mode controls the thickness of the whole exciter and can avoid collision between the coil and the first shell when the vibrator component vibrates. And the magnetic short circuit can be effectively reduced by arranging the avoiding hole 111.

Referring to fig. 2 and 4, in one embodiment, a magnetic conductive plate 18 is further disposed in the exciter, and the magnetic conductive plate 18 is covered on an end face of one end of the magnet group along the vibration direction of the vibrator assembly. The magnetic conduction plate 18 is connected with the magnet group so as to form the functions of converging and concentrating the magnetic field generated by the magnet group, and correct and gather magnetic induction lines emitted by the magnet group, thereby improving the magnetic field intensity and reducing magnetic leakage.

Referring to fig. 2 and 3, in an embodiment, the elastic element is an elastic sheet 17; the spring plate 17 includes a fixing rod 171 and two cantilevers 172 extending from the fixing rod 171, the fixing rod 171 is connected to the vibrator assembly, and one end of the cantilevers 172 extending from the stator assembly is connected to the stator assembly. In the embodiment shown in fig. 2, the fixing rod 171 is connected to the magnet assembly, and when the magnetic plate is provided, the fixing rod is connected to the magnetic plate 18, and the protruding end of the cantilever 172 is connected to the inner surface of the second housing 19.

Referring to fig. 4, in another embodiment, the elastic element is an elastic wave 17 ', the elastic wave 17' is composed of two segments forming a certain angle with each other and may have a bending structure according to practical circumstances, one segment of the elastic wave 17 'is connected with the vibrator assembly and the other segment of the elastic wave 17' is connected with the stator assembly. In the embodiment shown in fig. 3, one of the sections of the damper 17' is connected to the magnet assembly, and when a magnetic plate is provided, to the magnetic plate 18, while the other section is connected to the side of the coil 12. The elastic sheet 17 or the elastic wave 17' can provide restoring force and buffering effect for the vibration of the vibrator assembly, can also provide restoring force for the reset of the screen of the electronic product after vibration, and reduces the risks of damage to the screen and incorrect reset of the screen. The elastic sheet 17 or the elastic wave 17' can generate damping and buffering effects to buffer the impact force applied to the screen, so that the screen is prevented from being damaged by the frequently-changed ampere force. Moreover, under the condition that the screen is made of a soft material with good deformability and relatively poor elastic recovery capability, the elastic sheet 17 or the elastic wave 17' can provide a return acting force for the screen, so that the screen returns to an initial balance position after finishing a vibration action each time. In this way, the lifetime of the screen can be increased, as well as the acoustic performance of the exciter.

Referring to fig. 5, the embodiment of the present invention further provides an electronic product, which includes the exciter 1 as described above; the exciter further comprises a product body which is divided into a fixed part 4 and a vibrating part, wherein the fixed part 4 is connected with the stator assembly of the exciter 1, and is connected with the outer surface of the second shell 19 in the embodiment shown in fig. 5; the vibrating portion is configured to be capable of vibrating with respect to the fixing portion 4, and the vibrating portion is connected to the outside of the bottom wall of the first housing 11 of the actuator 1. The vibrating portion is a screen 2 for vibrating and sounding of the electronic product and/or a rear cover 3 (the screen 2 is taken as an example for explanation below) disposed opposite to the screen 2, and the fixing portion 4 is a part of the structure of the product main body, in one embodiment, the fixing portion 4 may be a middle frame, a side wall, or a PCB or the like in the product main body. In order to mount other electronic devices in the product body, the product body is often configured with a partition, a middle frame and other structural components, which have good structural stability in the electronic product, and are used for mounting the electronic devices on one hand and protecting the electronic devices on the other hand. Therefore, by using such a structure member in the product body as the fixing portion 4, the conversion rate of the ampere force into the vibration can be improved, and the vibration reliability can be improved. The inner surface of the side wall of the product body may also serve as the fixing portion 4.

The actuator 1 is arranged in the product body. The electronic product can be a mobile phone or a tablet computer and the like, and the utility model discloses do not restrict this. The screen 2 is provided on the product main body and serves as a display screen of an electronic product. The screen 2 can be connected to the product body in a mode that one end is rotatable, and the other end can be freely moved; alternatively, it is also possible to make the screen 2 of a material having good elastic deformability, the screen 2 being arranged in such a way that one end is fixedly connected to the other fixed part and the other end is freely movable, so that the screen 2 can vibrate with respect to the body of the product. The stator assembly of the exciter 1 is fixedly arranged on a component which is equivalent to the fixing part 4 on the product main body, the vibrator assembly is fixedly arranged on the screen 2, and the screen 2 can be driven to vibrate and sound through the magnetic force generated by the vibrator assembly. The utility model provides an electronic product is because of having adopted the utility model provides an exciter, consequently the space that occupies on the thickness direction that is on a parallel with the screen of electronic product still less, more be favorable to the thinness of electronic product design, satisfy the frivolous design demand of electronic product. On the other hand, the design mode of directly driving the screen to vibrate is adopted, so that the processing and assembling processes of the product are simplified, and the cost is reduced.

Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (11)

1. An actuator, comprising:

the magnetic coil comprises a coil and a magnet group, wherein the magnet group comprises two magnets which are mutually connected and have perpendicular magnetic pole directions, and the magnet group is arranged on at least one side of the coil along the axial direction;

the vibrator assembly is configured to be connected with an external device and drive the external device to vibrate, the vibrator assembly comprises a first shell and a vibrator fixed on the first shell, and the vibrator is one of a coil or a magnet group;

a stator assembly comprising the other of a coil or a set of magnets;

the magnet group and the coil generate vibration for the vibrator component through electromagnetic action, and the axis of the coil is perpendicular to the vibration direction of the vibrator component;

a resilient element connected with the vibrator assembly and the stator assembly, respectively.

2. The actuator of claim 1, wherein the actuator comprises two of said magnet sets, the two magnet sets being disposed opposite each other on opposite sides of the coil, the two magnet sets forming a magnetic field therebetween.

3. The actuator of claim 2, wherein one of said magnet sets comprises a first magnet and a second magnet, wherein the first magnet has a magnetic pole orientation of: the S pole is close to the coil, and the N pole is far away from the coil; the magnetic pole direction of the second magnet is as follows: the S pole is close to the first magnet, and the N pole is far away from the first magnet;

another magnet group includes third magnet and fourth magnet, and wherein the magnetic pole direction of third magnet is: the N pole is close to the coil, and the S pole is far away from the coil; the magnetic pole direction of the fourth magnet is as follows: the N pole is close to the third magnet, and the S pole is far away from the third magnet.

4. An actuator according to claim 1, wherein the resilient element is a spring; the elastic sheet comprises a fixed rod and at least one cantilever extending out of the fixed rod, the fixed rod is connected to the vibrator assembly, and one end, extending out of the cantilever, of the cantilever is connected to the stator assembly.

5. An actuator according to claim 1, wherein the resilient member is an elastic wave, one end of the elastic wave being connected to the vibrator assembly and the other end of the elastic wave being connected to the stator assembly.

6. The exciter of claim 1, further comprising a magnetically conductive plate disposed over an end face of one end of the magnet assembly in a direction of vibration of the vibrator assembly.

7. The exciter of claim 1, wherein the stator assembly further comprises a second housing, and wherein one of the coils or magnet sets belonging to the stator assembly is fixedly attached to the second housing.

8. An exciter according to any of claims 1 to 7, wherein the first housing is a cylindrical structure having a bottom wall, the side opposite to the bottom wall is an open end, the vibrator is a magnet set, the magnet set is fixedly connected to the first housing, and the coil extends from the open end of the first housing.

9. The exciter of claim 8, wherein the first housing is magnetically permeable.

10. The exciter of claim 9, wherein an avoiding hole is formed in the middle of the bottom wall of the first housing.

11. An electronic product, comprising:

an actuator of any one of claims 1-10;

a fixed part connected with a stator assembly of the exciter;

a vibrating portion configured to be vibratable relative to the fixing portion, the vibrating portion being connected to a first housing of an exciter.

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