CN111726736A

CN111726736A - Exciter and electronic device

Info

Publication number: CN111726736A
Application number: CN202010611596.4A
Authority: CN
Inventors: 李明阳
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-09-29
Anticipated expiration: 2040-06-29
Also published as: CN111726736B

Abstract

The embodiment of the application provides an exciter, be suitable for and set up in electronic equipment, electronic equipment includes the display screen, the exciter includes the exciter body, sheetmetal and support, the sheetmetal includes first binding face and second binding face, first binding face includes bonding area and non-bonding area, the non-bonding area encircles the bonding area setting, the bonding area coating has the viscose and bonds with the vibrator subassembly, the thickness of non-bonding area is greater than the thickness of bonding area, stator module demountable installation is in the support for be connected with electronic equipment. Through setting up the detachable support, when needs maintain, can solitary dismantlement oscillator subassembly or stator module, avoided dismantling whole exciter or maintain the change, practice thrift the cost. Meanwhile, as the vibrator component is attached to the display screen through the metal sheet, the sound effect can be improved in the attaching process. Meanwhile, the embodiment of the application also provides the electronic equipment.

Description

Exciter and electronic device

Technical Field

The application relates to the technical field of electroacoustic equipment, in particular to an exciter and electronic equipment.

Background

With the advent of the mobile internet age, the number of intelligent electronic devices is increasing. Among many electronic devices, the mobile phone is undoubtedly the most common and portable mobile terminal. At present, the functions of the mobile phone are very diverse, one of them is a high-quality music function, and with the increasing popularization of technologies such as full-screen, the space for arranging the sound production structure in the electronic equipment is smaller and smaller, so that a sound production structure through a screen is born.

The screen sound production equipment at present is very inconvenient when installation, maintenance, very easily causes the damage to screen sound production equipment, to the consumer, uses and experiences not good, and this has restricted screen sound production equipment's application.

Disclosure of Invention

It is an object of the present application to provide an actuator and an electronic device to improve the above technical problems.

In a first aspect, an embodiment of the present application provides an exciter, which is suitable for being disposed in an electronic device, the electronic device includes a display screen, the exciter includes an exciter body, a metal sheet and a support, the exciter body includes a vibrator component, an elastic member and a stator component, the vibrator component is connected with the stator component through the elastic member, the vibrator component is configured to vibrate under driving when the stator component is powered on, the metal sheet includes a first attaching surface and a second attaching surface that are opposite to each other, the first attaching surface includes an adhesion area and a non-adhesion area, the non-adhesion area is disposed around the adhesion area, the adhesion area is coated with an adhesive and adheres to the vibrator component, the second attaching surface is suitable for being connected with the display screen, a thickness of the non-adhesion area is greater than a thickness of the adhesion area, the stator component is detachably mounted to the support, and the support is configured.

In a second aspect, an embodiment of the present application provides an electronic device, including center, display screen and foretell exciter, the center includes medium plate and frame, and the frame encloses to locate the medium plate and is connected with the medium plate, and the display screen assembles in the frame, and the support is fixed in the medium plate, and the sheetmetal is laminated in the display screen.

The utility model provides an exciter and electronic equipment through setting up the detachable support, can be so that whole exciter when needs maintain, can solitary dismantlement oscillator subassembly or stator module, has avoided dismantling whole exciter or has maintained the change, practices thrift the cost. Simultaneously because the vibrator subassembly laminates through sheetmetal and display screen, consequently at the laminating in-process, can enlarge the vibration face, improve the audio to the vibrator subassembly does not direct contact screen, reduces the effort to the display screen at the vibration in-process, avoids vibrating the too strong display screen damage that arouses. Meanwhile, the thickness of the non-bonding area is larger, so that the arrangement of viscose is facilitated, and the vibration component directly acts on the bonding area, so that when vibration is transmitted on the metal sheet, the vibration energy from the bonding area to the non-bonding area is gradually reduced, and the phenomenon that the edge of the non-bonding area, which is far away from the bonding area, violently vibrates (forms resonance) to puncture the display screen can be avoided.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;

fig. 2 is a schematic partial cross-sectional structure diagram of an electronic device according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram illustrating a split structure of an exciter according to an embodiment of the present application;

FIG. 4 is a diagram of the method at IV in FIG. 2;

FIG. 5 is a schematic view of an actuator assembly according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a cradle in an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the current screen sounding technology, two vibrator design schemes required by screen sounding are in the mainstream.

The first solution is that the exciter is assembled on the middle frame as a whole, and the vibration of the middle frame is used to drive the screen to vibrate and generate sound. The scheme has poor tone quality and poor privacy. The vibration sense fed back by the display screen is stronger and the experience is poor in the using process of a user. And when the exciter needs to be completely disassembled during maintenance and replacement, the cost is high.

The second scheme is that the upper vibrator and the lower vibrator are combined, fixed and assembled at the same time, the vibrators are firstly attached to a screen, and then the stator is fixed to the middle frame. The assembly deviation of the upper vibrator and the lower vibrator is small, the vibration effect of the screen can be improved, and the sound effect is good. However, when the stator is badly disassembled and replaced, the vibrator needs to be synchronously disassembled, so that the screen bonded with the vibrator is scrapped and cannot be reused, the screen belongs to a valuable device on an electronic product, and the additional cost of the product is greatly increased by the design scheme.

Therefore, the inventors propose an actuator and an electronic device in the embodiments of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the present embodiment provides an electronic device 10, which includes a middle frame 20, a display screen 30 and an exciter 100, wherein the display screen 30 is assembled in the middle frame 20, and the exciter 100 is disposed inside the middle frame 20, below the display screen 30, and attached to the display screen 30 to form a screen sounding structure through vibration.

Referring to fig. 1 and 2, the middle frame 20 includes a middle plate 21 and a frame 22, wherein the middle plate 21 is substantially plate-shaped and is used for mounting various types of components, the frame 22 surrounds the middle plate 21 and is connected to the middle plate 21, the display screen 30 is mounted on the frame 22 during assembly and is substantially spaced from the middle plate 21, in some embodiments, the frame 22 is formed with a step facing inward, and the display screen 30 is mounted on the frame 22 and rises to the step to form an assembly.

Referring to fig. 2 and fig. 4, the midplane 21 includes a first surface 23 and a second surface 24, the first surface 23 and the second surface 24 face away from each other, wherein the display 30 is installed on one side of the first surface 23 of the midplane 21, and the second surface 24 is used for installing a motherboard and other components of the electronic device 10. In some embodiments, the middle plate 21 is provided with a mounting hole 25, and the mounting hole 25 penetrates the first surface 23 and the second surface 24 for passing the exciter 100 therethrough.

In this embodiment, the second surface 24 of the middle plate 21 is provided with a connection post 26, the connection post 26 protrudes towards the second side away from the first surface 23, the connection post 26 is located at the edge of the middle plate 21 close to the mounting hole 25 and may be provided around the mounting hole 25, the connection post 26 is used for connecting with the exciter 100. In one embodiment, the number of the connection posts 26 is two, and the two connection posts 26 are arranged along the diagonal direction of the mounting hole 25. It is understood that in other embodiments, the number of connecting posts 26 can be one, three, or more than three, etc. The attachment post 26 is formed with an attachment hole therein adapted to be secured by an actuator 100 such as a connector (e.g., a screw). The height of the connecting post 26 is determined by the overall thickness of the actuator 100.

In other embodiments, the actuator 100 may be directly disposed on the first surface 23 and attached to the display 30 without the mounting hole 25.

The display screen 30 may be, for example, a touch screen or a non-touch screen, wherein a non-exterior surface of the display screen 30 is located inside the middle frame 20 and is used for being attached to the exciter 100, and an exterior surface opposite to the non-exterior surface is exposed for a user to operate.

Referring to fig. 3 and 4 together, the exciter 100 is used to generate sound by vibration and is adapted to be mounted under the display screen 30, and the exciter 100 includes an exciter body 110, a metal plate 130, and a bracket 120. The exciter body 110 is used for vibrating and sounding, the metal sheet 130 is attached to the display screen 30, and the bracket 120 is used for connecting the exciter body 110 and the middle frame 20.

The exciter body 110 includes a vibrator assembly 112, an elastic member 113, and a stator assembly 111, the vibrator assembly 112 is connected to the stator assembly 111 through the elastic member 113, and the vibrator assembly 112 is configured to be driven to vibrate when the stator assembly 111 is energized. Specifically, the working principle of the vibrator assembly 112 and the stator assembly 111 is as follows: the stator assembly 111 includes a coil, a pole core, magnetic steel, and a housing. The coil and the pole core are electrified to generate an alternating magnetic field to provide power for driving the vibrator assembly 112. The shell plays a supporting role and plays a magnetic conduction role at the same time. The vibrator assembly 112 is composed of magnetic steel and a housing. The polarities of the magnetic steels of the vibrator and the stator are opposite, and the vibrator and the stator are relatively suspended by the principle that like poles repel each other, so that a distance is provided for vibration to avoid noise. The elastic member 113 connects the vibrator assembly 112 and the stator assembly 111 to maintain a predetermined gap between the vibrator assembly 112 and the stator assembly 111, and the vibrator assembly 112 and the stator assembly 111 are relatively suspended during vibration of the vibrator assembly 112.

Referring to fig. 4, the metal plate 130 is attached to the vibrator assembly 112 and is adapted to be attached to the display 30. Specifically, the metal sheet 130 includes a first attaching surface 131 and a second attaching surface 132 opposite to each other, where the first attaching surface 131 and the second attaching surface 132 are parallel to each other, the first attaching surface 131 is attached to the housing of the vibrator assembly 112, and the second attaching surface 132 is attached to the lower side of the display screen 30 and attached to the non-exterior surface of the display screen 30. The metal sheet 130 may be attached to the vibrator assembly 112 and the display 30 by an adhesive, and further, the metal sheet 130 may be attached to the display 30 in a manner parallel to the display 30, so that when the vibrator assembly 112 vibrates, the acting force of the metal sheet 130 on the display 30 is uniform on the whole plane where the metal sheet 130 is located, and damage to the display 30 due to excessive local stress is avoided.

In some embodiments, the area of the metal sheet 130 is larger than the area of the surface of the vibrator assembly 112 for conforming to the metal sheet 130. The advantages of such an arrangement are: because the vibration energy and the vibration amplitude are transmitted to the display screen 30 through the metal sheet 130 when the vibrator assembly 112 vibrates, when the area of the metal sheet 130 is larger than the area of the surface, which is used for being attached to the metal sheet 130, of the vibrator assembly 112, the vibration area of the display screen 30 during vibration can be enhanced, the vibration intensity is further improved, and the sound production effect is improved. Meanwhile, as the area of the metal sheet 130 is increased, the vibration amplitude is dispersed and reduced on the whole metal sheet 130, so that the vibration amplitude of the display screen 30 is reduced, and the situation that a user is at the position of the user is avoidedThe display screen 30 is felt to vibrate violently when in use. As an example, the area of the metal sheet 130 should be larger than 600mm, for example²And the area of the metal sheet 130 is greater than or equal to 3 times the area of the surface of the vibrator assembly 112 for conforming to the metal sheet 130.

Since the area of the metal plate 130 is larger than the area of the surface of the vibrator assembly 112 for the attachment with the metal plate 130, only a portion of the first attachment surface 131 is attached to the vibrator assembly 112 when the first attachment surface 131 is attached to the vibrator assembly 112. The first attaching surface 131 includes an attaching area attached to the vibrator assembly 112 and a non-attaching area where no adhesive is provided. In some embodiments, the non-adhesive region is disposed around the adhesive region such that the vibrator assembly 112 is adhered to the metal plate 130 at substantially a central position thereof, the distance from the edge of the metal plate 130 to the vibrator assembly is substantially the same when the vibrator assembly 112 vibrates, and the vibration energy is substantially equivalent at each point of the edge of the metal plate 130 when the vibration energy is transmitted from the vibrator assembly 112 to the edge of the metal plate 130.

In some embodiments, referring to fig. 5, the bonding region is spaced apart from the plurality of protrusions 134, the non-bonding region is disposed around the bonding region, the bonding region is coated with an adhesive, the adhesive fills gaps between adjacent protrusions 134 and bonds with the vibrator assembly 112, and the protrusions 134 may be integrally formed with the metal sheet 130. The advantages of such an arrangement are: in one aspect, the adhesive fills the gaps between adjacent protrusions 134, such that the adhesive and the protrusions 134 create a "nail" effect, which improves the adhesion between the metal sheet 130 and the vibrator assembly 112. On the other hand, since the protrusions 134 are disposed from the metal plate 130 toward the vibrator assembly 112, when the vibrator assembly 112 vibrates, the vibration energy is transmitted to the metal plate 130 in a direction perpendicular to the metal plate 130, and further transmitted to the display screen 30 to generate sound. Since the protrusions 134 are also arranged in a direction perpendicular to the metal sheet 130, which is the same direction as the vibration direction, the protrusions 134 are spaced apart, and the spaces are filled with a flexible adhesive. The structural strength at the protrusions 134 and the gaps filled with the adhesive therefore has the property of alternating strength and weakness, and during vibration, the energy attenuation of the vibration energy at the flexible adhesive-filled gaps during transmission is greater than the energy attenuation at the protrusions 134, and therefore the vibration energy also exhibits the property of alternating strength and weakness. Therefore, the points on the display screen 30 corresponding to the protrusions 134 are strong in vibration and can keep enough sound-producing sound effects, and a plurality of regions with relatively weak vibration energy are arranged around each point corresponding to the protrusions 134 on the display screen 30, so that when a user uses the display screen 30 in a sound-producing process and touches any point of the display screen 30, the vibration energy is changed in strength, the user experience on vibration is not obvious, and other operation experiences of the user are prevented from being influenced by the screen sound-producing process.

The thickness of the non-adhesive area is greater than the thickness of the adhesive area, i.e. the maximum thickness of the adhesive area is less than the maximum thickness of the non-adhesive area. The advantages of such an arrangement are: on the one hand, the arrangement of the adhesive is more facilitated, on the other hand, because the vibrator component directly acts on the adhesive area, when vibration is transmitted on the metal sheet, the vibration energy from the adhesive area to the non-adhesive area is gradually reduced, and severe vibration (resonance formation) at the edge of the non-adhesive area, which is far away from the adhesive area, can be avoided to puncture the display screen.

Referring to fig. 5, since the metal sheet 130 is usually formed by stamping, the edges of the metal sheet 130 are sharp. Therefore, in some embodiments, the metal sheet 130 further includes a connecting surface 133, the connecting surface 133 is connected between the first abutting surface 131 and the second abutting surface 132, and the second abutting surface 132 protrudes from the first abutting surface 131 so that the connecting surface 133 is inclined with respect to the first abutting surface 131. The connecting surface 133 is disposed obliquely and connects the first bonding surface 131 and the second bonding surface 132, corresponding to the area of the second bonding surface 132 being larger than the area of the first bonding surface 131. The advantages of such an arrangement are: vibration energy is firstly conducted from the first bonding surface 131 to the second bonding surface 132, because the area of the second bonding surface 132 is larger than that of the first bonding surface 131, in the vibration process of the metal sheet 130, the first bonding surface 131 vibrates along the direction perpendicular to the metal sheet 130, and in the projection area of the connecting surface 133 on the second bonding surface 132, the vibration is weaker because the vibration energy is not directly received along the direction perpendicular to the metal sheet 130, namely, the edge part of the second bonding surface 132 vibrates weakly; the first attaching surface 131 vibrates strongly in the projection area of the second attaching surface 132, that is, the center area of the second attaching surface 132 vibrates strongly, and this arrangement can prevent the edge of the metal sheet 130 from damaging the display screen 30 in the vibration process.

Typically, a user will use a portion of the bezel 22 adjacent the center frame 20 adjacent the ear when using the electronic device 10 to listen to a voice call. Therefore, placing the exciter 100 close to the bezel 22 is more beneficial for receiving sounds, but on the other hand, it is desirable to maximize the area of the display screen 30, so that the exciter 100 is placed in the center of the display screen 30 to be more beneficial for the overall sound production of the display screen 30. As an embodiment, at least one side edge of the metal sheet 130 may be abutted against the frame 22, wherein it is understood that the metal sheet 130 may have one or more edges. The advantages of such an arrangement are: on the one hand, sheetmetal 130 offsets and contacts with frame 22, and screen sound production structure extends to frame 22 region at least, therefore screen sound production structure extends to frame 22 at least, and partly vibration energy can transmit to frame 22, and synchronous drive frame 22 vibrates the sound production, does benefit to the receiver. On the other hand, the metal sheet 130 is made of a metal material, and needs to be grounded when being disposed in the middle frame 20, and after at least one side edge of the metal sheet 130 is in contact with the frame 22, the frame 22 can be directly used for grounding, and an additional grounding structure is not needed to be disposed, so that the internal space of the electronic device 10 is saved. As an example, the metal sheet 130 may be in contact with the top of the frame 22, which is the top of the electronic device 10, i.e. the part that is usually used for ear-receiving.

Please refer to fig. 5, as mentioned above, the connecting surface 133 of the edge of the metal sheet 130 is disposed obliquely, so as to improve the contact effect between the metal sheet 130 and the frame 22. The step for disposing the display screen 30 on the frame 22 may be disposed to be inclined to match the connection surface 133, and the edge of the metal sheet 130 is embedded into the step and integrally overlapped on the frame 22 to form a contact on the frame 22, while the second adhesion surface 132 maintains a parallel state with the display screen 30 for supporting the display screen 30. In this embodiment, the metal sheet 130 can be pressed against the frame 22 through the display 30, so as to form a stable grounding structure, and the support of the display 30 is higher.

Stator assembly 111 is removably mounted to bracket 120, and bracket 120 is configured for connection with electronic device 10. When the stator assembly 111 needs to be disassembled, the bracket 120 can be directly disassembled or the stator assembly 111 can be directly disassembled.

In some embodiments, referring to fig. 6, the bracket 120 includes a connecting plate 121 and an ear 122, the stator assembly 111 is detachably connected to the connecting plate 121, and in particular, the connecting plate 121 may fix the stator assembly 111 by screws or the like. The ear portion 122 is connected to an edge of the connection plate 121 and is used for connection with the electronic device 10. In this embodiment, the ear 122 is provided with a through hole for detachably connecting with the middle frame 20 of the electronic device 10 through a connector, the ear 122 is fixedly connected with the connecting post 26 through a connector such as a screw, the connecting plate 121 is located on one side of the second surface 24 of the middle plate 21, and the whole formed by the stator assembly 111 and the vibrator assembly 112 passes through the mounting hole 25, so that the vibrator assembly 112 is attached to the first attaching surface 131 of the metal sheet 130.

Since the connection plate 121 is disposed on the same plane as the ear portion 122, the thickness of the electronic device 10 is not increased by the support structure during the process of disposing the exciter 100. And because the ear 122 extends out of the connecting plate 121 and is connected with the middle frame 20, the connecting position of the stator assembly 111 and the connecting plate 121 can be staggered, and the disassembly is convenient.

In the exciter 100 of the present embodiment, when maintenance and disassembly are required, the stator assembly 111 or the vibrator assembly 112 can be disassembled separately, so that maintenance cost is reduced, and popularization is facilitated. Meanwhile, the sound production efficiency of the exciter 100 can be improved by arranging the metal sheet 130. The electronic device 10 using the actuator 100 has better sound effect of screen sound production.

The electronic device 10 in the present application may be a mobile phone or smart phone (e.g., an iPhone (TM) based, Android (TM) based phone), a Portable gaming device (e.g., a Nintendo DS (TM), a PlayStation Portable (TM), a Game Advance (TM), an iPhone (TM)), a laptop, a PDA, a Portable Internet appliance, a music player and data storage device, other handheld devices and head-mounted devices such as a watch, a headset, a pendant, a headset, etc., the electronic device 10 may also be other wearable devices (e.g., a head-mounted device (HMD) such as electronic glasses, electronic clothing, an electronic bracelet, an electronic necklace, an electronic tattoo, the electronic device 10, or a smart watch).

The electronic device 10 may also be any of a number of electronic devices 10, including, but not limited to, cellular telephones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, vehicle transportation equipment, calculators, programmable remote controls, pagers, laptop computers, desktop computers, printers, netbook computers, Personal Digital Assistants (PDAs), Portable Multimedia Players (PMPs), moving Picture experts group (MPEG-1 or MPEG-2) Audio layer 3(MP3) players, portable medical devices, and digital cameras, and combinations thereof.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An actuator adapted to be disposed in an electronic device, the electronic device including a display screen, comprising:

the exciter body comprises an oscillator assembly, an elastic piece and a stator assembly, wherein the oscillator assembly is connected with the stator assembly through the elastic piece, and the oscillator assembly is used for driven vibration when the stator assembly is electrified;

the metal sheet comprises a first binding surface and a second binding surface which are opposite, the first binding surface comprises an adhesion area and a non-adhesion area, the non-adhesion area is arranged around the adhesion area, the adhesion area is coated with an adhesive and is adhered to the vibrator component, the second binding surface is suitable for being connected with the display screen, and the thickness of the non-adhesion area is larger than that of the adhesion area; and

a bracket to which the stator assembly is removably mounted, the bracket configured for connection with an electronic device.

2. An exciter according to claim 1, wherein the area of the metal sheet is greater than the area of the surface of the vibrator assembly for abutment with the metal sheet.

3. The exciter of claim 2, wherein the bonding areas are spaced apart by a plurality of protrusions, and the adhesive fills gaps between adjacent protrusions and bonds to the vibrator assembly.

4. An actuator according to claim 3, wherein the metal sheet further comprises a connecting face connected between the first abutting face and the second abutting face, the second abutting face protruding from the first abutting face such that the connecting face is inclined with respect to the first abutting face.

5. The exciter of claim 1, wherein the bracket comprises a connecting plate to which the stator assembly is removably attached and an ear attached to an edge of the connecting plate and adapted to be coupled to the electronic device.

6. An actuator according to claim 5, wherein the ear portion is provided with a through hole for detachable connection with the electronic device through a connector.

7. An electronic device, comprising:

the middle frame comprises a middle plate and a frame, and the frame is arranged around the middle plate and connected with the middle plate;

the display screen is assembled on the frame;

the actuator of any one of claims 1 to 6, said support being fixed to said middle plate, said metal sheet being attached to said display screen.

8. The electronic device of claim 7, wherein the middle plate has a mounting hole, the middle plate includes a first surface and a second surface opposite to each other, the display screen is located on one side of the first surface of the middle plate, and the stator assembly passes through the mounting hole and is fixed to the second surface through the bracket.

9. The electronic device of claim 8, wherein the second surface is provided with a connection post, and the stand is mounted to the connection post through a connection member.

10. The electronic device of claim 7, wherein at least one side edge of the metal sheet abuts the bezel.