CN111031451B

CN111031451B - Exciter and electronic product

Info

Publication number: CN111031451B
Application number: CN201911245757.6A
Authority: CN
Inventors: 毛东升; 高文花; 王永强; 高志明
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2019-12-07
Filing date: 2019-12-07
Publication date: 2022-04-05
Anticipated expiration: 2039-12-07
Also published as: CN111031451A

Abstract

The invention discloses an exciter and an electronic product, wherein the exciter comprises a coil and a magnet; the vibration generator comprises a first shell and a vibrator fixed on the first shell, wherein the vibrator is one of a coil or a magnet; the stator assembly comprises a second shell and a stator fixed on the inner surface of the second shell, and the stator is the other one of a coil or a magnet; the magnet and the coil generate vibration for the vibrator component through electromagnetic action; the elastic element is respectively connected with the vibrator assembly and the stator assembly; the bracket is detachably coupled at an outer surface of the second housing, and is configured to be coupled with a fixing portion of an external device.

Description

Exciter and electronic product

Technical Field

The invention relates to the technical field of electronic products, in particular to an exciter and an 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 exciter can be divided into an integrated exciter and a split exciter, the existing integrated direct-drive exciter is of a complete integrated structure, when the exciter needs to be disassembled by optimizing and adjusting the installation of the mobile phone again, the exciter is difficult to disassemble, the whole exciter is easy to damage and scrap during disassembly, and cost control is not facilitated.

In view of the above, a new technical solution is needed to solve the above technical problems.

Disclosure of Invention

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 actuator comprising:

a coil and a magnet;

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

the stator assembly comprises a second shell and a stator fixed on the inner surface of the second shell, and the stator is the other one of a coil or a magnet;

the magnet and the coil generate vibration for the vibrator component through electromagnetic action;

an elastic element connected with the vibrator assembly and the stator assembly, respectively;

a bracket detachably connected at an outer surface of the second case, the bracket configured to be connected with a fixing portion of an external device.

Optionally, the actuator includes two of the brackets, and the two brackets are respectively attached to both end positions of the outer surface of the second housing.

Optionally, one of the bracket and the second housing has a gear shaping and the other has a slot, and the gear shaping is inserted into the slot in an interference fit manner so that the bracket and the second housing are detachably connected.

Optionally, the bracket is detachably connected to the second housing by a bolt.

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

Optionally, the elastic element is a spring plate, the spring plate includes a fixing frame and at least one suspension plate extending from the fixing frame, the fixing frame is connected with the stator assembly, and the suspension plate is connected with the mover assembly.

Optionally, the exciter further includes a magnetic conductive plate, and the magnetic conductive plate is covered on an end face of one end of the magnet along the vibration direction of the vibrator assembly.

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, the magnet is fixedly connected to an inner surface of the first housing, and the coil extends into the first housing from the open end of the first housing.

According to another aspect of the present invention, there is provided an electronic product including:

an actuator as described above;

a fixed part connected with a bracket 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.

Optionally, the fixing portion is connected to the bracket of the exciter by a bolt.

According to the exciter provided by the embodiment of the invention, the bracket is arranged between the second shell and the fixing part of the external equipment, and is detachably connected to the outer surface of the second shell and is connected with the fixing part of the external equipment through the bracket, so that when the exciter needs to be detached from the external equipment, the bracket and the second shell are firstly detached, the exciter can be conveniently separated from the fixing part of the external equipment, the detaching difficulty is reduced, and the second shell and the stator are prevented from being damaged in the detaching process.

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

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this 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 view of a first embodiment of the present invention, in which a bracket is connected to a second housing;

fig. 3 is an exploded view of a first embodiment of the present invention, wherein the bracket is connected to the second housing;

FIG. 4 is a schematic view of another embodiment of an actuator according to the present invention, in which a bracket is coupled to a second housing;

fig. 5 is an exploded view of an actuator according to another embodiment of the present invention, in which a bracket is coupled to a second housing;

fig. 6 is a schematic structural diagram of a spring plate in an actuator according to the present invention;

fig. 7 is a schematic structural diagram of an electronic product provided by 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: 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 unless specifically stated otherwise.

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 present invention provides an actuator, as shown in fig. 1, including a coil 11 and a magnet 12; the vibration generator comprises a vibrator component, a stator component and an elastic element, wherein the vibrator component is configured to be connected with a vibration part of external equipment so as to drive the vibration part of the external equipment to vibrate, the vibrator component comprises a first shell 13 and a vibrator fixed on the first shell 13, and the vibrator is one of a coil 11 or a magnet 12; the stator assembly comprises a second shell 14 and a stator fixed on the inner surface of the second shell 14, wherein the stator is the other one of the coil 11 or the magnet 12; the magnet 12 and the coil 11 generate vibration to the vibrator assembly through electromagnetic action, and the axis of the coil 11 is perpendicular to the vibration direction of the vibrator assembly; the coil 11 is provided with a through hole in the middle, the coil 11 is wound by a wire in one direction to form a closed annular structure, the periphery of the through hole in the middle is a wiring area of the coil 11, the wiring area refers to an area through which a lead wire in the coil 11 actually passes, and the whole wiring area is annular. The magnet 12 is located on at least one side of the coil 11 in the axial direction. The elastic element is respectively connected with the vibrator assembly and the stator assembly and is 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. The actuator further comprises a bracket 15, said bracket 15 being detachably connected at the outer surface of the second housing 14, said bracket 15 being configured to be connected with a fixed part of an external device.

The exciter in the prior art is generally directly connected to the fixed portion of the external device by using the second housing 14, and since the second housing 14 is also directly and fixedly connected to the stator of the exciter, when the exciter needs to be detached from the external device, the second housing 14 is easily damaged, and even further damage to the stator may be caused. According to the exciter provided by the embodiment of the invention, the bracket 15 is arranged between the second shell 14 and the fixed part of the external equipment, and the bracket 15 is detachably connected to the outer surface of the second shell 14 and is connected with the fixed part of the external equipment through the bracket 15, so that when the exciter needs to be detached from the external equipment, the bracket 15 is firstly detached from the second shell 14, and the exciter can be conveniently separated from the fixed part of the external equipment, thereby reducing the difficulty of detachment and avoiding damaging the second shell 14 and the stator in the detaching process.

In one embodiment, the actuator includes two brackets 15, and the two brackets 15 are respectively attached to both end positions of the outer surface of the second housing 14.

The brackets 15 are respectively provided at both end positions of the outer surface of the second housing 14, so that the connection can be more balanced and stable when the brackets 15 are used for connection with the fixed portion of the external device. The two supports 15 may be arranged in the same direction, or the two supports 15 may be arranged in different directions as shown in fig. 1, according to the actual application of the product.

Referring to fig. 2 and 3, in one embodiment, one of the rack 15 and the second housing 14 has a gear shaping 141, and the other has a slot 151, and the gear shaping 141 is inserted into the slot 151 in an interference fit manner to detachably connect the rack 15 and the second housing 14. That is, the gear shaping 141 may be provided on the second housing 14, while the insertion groove 151 is correspondingly provided on the bracket 15; it is also possible to provide the slots 151 on the second housing 14 with the gear teeth 141 on the holder 15 accordingly.

In this embodiment, the bracket 15 is detachably connected to the second housing 14 by plugging. The interference fit and insertion of the gear shaping 141 and the slot 151 can ensure the firm stability of the connection between the bracket 15 and the second housing 14. When the removal is necessary, the gear 141 may be separated from the slot 151 by a tool.

Referring to fig. 4 and 5, in one embodiment, the bracket 15 is detachably connected to the second housing 14 by bolts. A first threaded hole 152 is formed in the bracket 15, a second threaded hole 142 matched with the first threaded hole 152 is formed in the second shell 14, and the bracket 15 and the second shell 14 can be connected through bolts penetrating through the first threaded hole 152 and the second threaded hole 142; when disassembly is required, the bracket 15 can be separated from the second housing 14 by unscrewing the bolts. The threaded connection mode is very convenient and reliable to install and disassemble.

In one embodiment, the actuator comprises two magnets 12, the two magnets 12 are oppositely arranged on two sides of the coil 11, and a magnetic field is formed between the two magnets 12. When an alternating current signal is applied to the coil 11, an ampere force can be generated between the coil 11 and the two magnets 12, and the direction of the generated ampere force is alternately changed in a reverse direction, and the vibrator assembly vibrates under the action of the alternately changed ampere force in the reverse direction.

Referring to fig. 6, in one embodiment, the elastic element is a spring 16, the spring 16 includes a fixing frame 161 and at least one hanging plate 162 extending from the fixing frame 161, the fixing frame 161 is connected to the stator assembly, and the hanging plate 162 is connected to the mover assembly.

The elastic element can provide restoring force and a buffering effect for the vibration of the vibrator assembly, can also provide restoring force for the reset of the vibrating part of the external equipment after vibration, and reduces the risk that the vibrating part is damaged or cannot be reset correctly. The elastic element can generate damping and buffering functions to buffer the impact force on the vibration part of the external equipment, so that the vibration part is prevented from being damaged by the frequently-changed ampere force.

Referring to fig. 1, in one embodiment, the exciter further includes a magnetic conductive plate 17, and the magnetic conductive plate 17 is covered on an end surface of one end of the magnet 12 along the vibration direction of the vibrator assembly. The magnetic conduction plate 17 is connected with the magnet 12 so as to form the functions of converging and concentrating the magnetic field generated by the magnet 12, and correct and gather magnetic induction lines emitted by the magnet 12, thereby improving the magnetic field intensity and reducing magnetic leakage.

Referring to fig. 1, in one embodiment, the stator assembly further includes a stopper 18, a lower surface of the fixing frame 161 of the resilient plate 16 is connected (e.g., welded) to the stopper 18, and the stopper 18 may be provided in two pieces, and the two stoppers 18 are respectively connected to both ends of the lower surface of the fixing frame 161 of the resilient member; the upper surface of the suspended plate 162 of the elastic element is connected (e.g., welded) to the magnetic conductive plate 17.

In one embodiment, the first housing 13 is a cylindrical structure having a bottom wall, one side opposite to the bottom wall is an open end, the vibrator is a magnet 12, the magnet 12 is fixedly connected with an inner surface of the first housing 13, the stator is a coil 11, and the coil 11 extends from the open end of the first housing 13. In this embodiment, the second casing 14 is a flat plate-like shape, and the flat plate-like second casing 14 is correspondingly provided at the open end of the first casing 13. Since the coil 11 generates a large amount of heat after current is applied thereto, it is preferable that the magnet 12 is used as a vibrator and the coil 11 is used as a stator, and thus the first case 13 directly connected to the vibration part of the external device is connected to the magnet 12 which does not generate heat, so that the first case 13 does not transmit heat to the vibration part while vibrating the vibration part, thereby protecting the vibration part from heat damage.

In one embodiment, the first casing 13 is made of a magnetic conductive material, and the magnetic leakage can be reduced by selecting the first casing 13 made of the magnetic conductive material. An avoiding hole can be formed in the middle of the bottom wall of the first shell 13, the avoiding hole is formed in a position corresponding to the coil 11, and the coil 11 can extend out of the first shell 13 from the avoiding hole. This design not only controls the thickness of the whole exciter, but also prevents the coil 11 from colliding with the first housing 13 when the vibrator assembly vibrates. And the magnetic short circuit can be effectively reduced by arranging the avoiding hole.

Referring to fig. 1, in one embodiment, the actuator further includes an FPCB19, a portion of the FPCB19 is connected to the coil 11, and another portion of the FPCB19 is used for connection to an external circuit.

The FPCB19 is a flexible circuit board having high wiring density, light weight, thin thickness, and good bendability; bending parts can be arranged on the FPCB19 according to requirements so as to facilitate circuit connection with external equipment.

Referring to fig. 7, an embodiment of the present invention further provides an electronic product, which includes the exciter 1 described above; the exciter also comprises a product main body, wherein the product main body is divided into a fixed part and a vibrating part, and the fixed part is connected with a bracket 15 of the exciter 1; the vibrating portion is configured to be capable of vibrating with respect to the fixed portion, and the vibrating portion is connected to the first housing 13 of the actuator 1.

The vibrating part may be, for example, a screen 2 of an electronic product and/or a rear cover 3 disposed opposite to the screen 2, and the screen 2 is explained as an example below. The fixing portion may be a fixing member in the electronic product, or may be a separately disposed fixed component. The magnet 12 of the exciter 1 is used as a vibrator and fixedly connected with the first shell 13, the first shell 13 is connected with the screen 2 of the electronic product, the coil 11 is used as a stator and positioned on the side surface of the magnet 12 and extends into the first shell 13 from the opening end, and the stator assembly comprising the coil 11 is connected with the fixing part of the electronic product. The axis of the coil 11 is perpendicular to the vibration direction of the magnet 12, that is, the axis of the coil 11 is parallel to the surface of the screen 2. The routing areas of the coil 11 include a first routing area close to the first housing 13 and a second routing area far away from the first housing 13. The wiring directions of the first wiring area and the second wiring area are parallel to the surface of the screen 2. The magnet 12 is capable of generating a magnetic field, and at least one of the first and second track regions is configured to pass through the magnetic field generated by the magnet 12. When the current signal passing through the coil 11 is an alternating signal, an ampere force can be generated between the coil 11 and the magnet 12, and the direction of the generated ampere force is alternately changed in the opposite direction, because the magnet 12 is arranged on the side surface of the coil 11, a part of the magnetic field generated by the magnet 12 can cross the coil 11 in the direction parallel to the axis of the coil 11, and further, the ampere force in the direction vertical to the surface of the screen 2 is generated. The alternating oppositely varying ampere force can be transmitted directly to the screen 2 through a vibrator assembly comprising the magnet 12 and the first housing 13. That is to say, the vibrator subassembly can directly drive screen 2 vibration after receiving ampere's power, and then makes screen 2 vibrate the sound production for the fixed part.

The fixing part is a part of the electronic product main body, and in one embodiment, the fixing part may be a middle frame 4, a side wall, or a PCB 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 4 and other structural components, which have good structural stability in the electronic product, on one hand, for mounting the electronic devices and on the other hand, for protecting the electronic devices. Therefore, by using such a structure member in the product body as the fixing portion, the conversion rate of the ampere force into the vibration can be increased, 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.

The electronic product may be a mobile phone or a tablet computer, and the invention is not limited thereto. 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 fixed part 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 electronic product provided by the invention adopts the exciter 1 provided by the invention, so that the occupied space in the thickness direction of the electronic product parallel to the screen 2 is less, the electronic product is more favorably designed to be thinner, and the design requirement of lightening and thinning the electronic product is met. On the other hand, the design mode of directly driving the screen 2 to vibrate is adopted, so that the processing and assembling processes of the product are simplified, and the cost is reduced.

Referring to fig. 2-5, in one embodiment, the fixed portion is bolted to the bracket 15 of the exciter 1. A flange structure 153 may be disposed on the bracket 15, a third threaded hole 154 is disposed on the flange structure 153, and a threaded hole matched with the third threaded hole 154 is disposed on the fixing portion, so as to connect the bracket 15 and the fixing portion by means of a bolt connection. Not only connect reliably convenient like this to also can separate support 15 and fixed part very conveniently when dismantling exciter 1, simultaneously because support 15 also can separate very conveniently with second casing 14, consequently when carrying out exciter 1 and dismantling, can guarantee at least that support 15 is simple and convenient and undamaged dismantles out, can reduce the whole destruction to exciter 1, thereby can carry out recycle to support 15, the reuse rate of part has been improved, manufacturing cost has been practiced thrift.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present 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

1. An actuator, comprising:

a coil and a magnet;

a bracket detachably connected at an outer surface of the second housing, the bracket configured to be detachably connected with a fixing part of an external device;

the first shell is of a cylindrical structure with a bottom wall, one side opposite to the bottom wall is an opening end, the second shell is of a flat plate shape, and the flat plate-shaped second shell is correspondingly arranged at the opening end of the first shell;

an avoidance hole is formed in the middle of the bottom wall of the first shell, the avoidance hole is formed in a position corresponding to the coil, and the coil can extend out of the first shell from the avoidance hole;

one of the bracket and the second shell is provided with a gear shaping, the other one of the bracket and the second shell is provided with a slot, and the gear shaping is inserted into the slot in an interference fit manner so that the bracket and the second shell can be detachably connected.

2. An actuator according to claim 1, comprising two of said brackets attached at respective end positions of an outer surface of the second housing.

3. An actuator according to claim 1, wherein the actuator comprises two of said magnets, said magnets being disposed opposite each other on either side of a coil, a magnetic field being formed between said magnets.

4. The exciter of claim 1, wherein the resilient element is a spring plate, the spring plate comprising a fixed frame and at least one suspended plate extending from the fixed frame, the fixed frame being coupled to the stator assembly, the suspended plate being coupled to the mover assembly.

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

6. The exciter of claim 1, wherein the vibrator is a magnet, the magnet is fixedly attached to an inner surface of the first housing, and the coil extends from an open end of the first housing.

7. An electronic product, comprising:

the actuator of any one of claims 1-6;

a fixed part connected with a bracket of the exciter;

8. The electronic product according to claim 7, wherein the fixing portion is connected to a bracket of the actuator by a bolt.