CN209980124U

CN209980124U - Sound production driving device

Info

Publication number: CN209980124U
Application number: CN201920694453.7U
Authority: CN
Inventors: 严绪东; 周科勇; 刘威; 张鹏飞
Original assignee: RUISHENG PHOTOELECTRIC TECHNOLOGY (CHANGZHOU) Co Ltd
Current assignee: RUISHENG PHOTOELECTRIC TECHNOLOGY (CHANGZHOU) Co Ltd
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2020-01-21
Anticipated expiration: 2029-05-15

Abstract

The utility model provides a sound production drive arrangement, it includes frame, screen, back of the body lid, center and exciter, the exciter includes relative first casing that has first accommodating space and the second casing that has second accommodating space that sets up, be equipped with the orientation in the first casing the first magnet of second casing, be equipped with second magnet and coil in the second casing, the second casing is including being used for fixing the magnetic conduction post of coil, second magnet interval set up in coil week side, the exciter include certainly first casing is to keeping away from first accommodating space extends or certainly the second casing is to keeping away from the fixed arm that second accommodating space extends, first casing or the second casing passes through the fixed arm is fixed in the center can dismantle the connection with the formation. Compared with the prior art, the utility model discloses a sound production drive arrangement's simple structure, easily equipment and dismouting and good reliability.

Description

Sound production driving device

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic conversion field especially relates to a sound production drive arrangement.

[ background of the invention ]

With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among many mobile devices, the mobile phone is undoubtedly the most common and portable sound-generating driving device. At present, the functions of mobile phones are very diverse, one of them is a high-quality music function, and therefore, a sound generating device for playing sound is widely applied to the current smart mobile devices. With the upgrading of functions and the limited volume of the sound production driving device, the hardware needs to be disconnected and optimized, and therefore, a structure for driving a screen to produce sound through an exciter to replace a sound production device to produce sound is provided.

The sound production driving device in the related art comprises a shell, a screen and an exciter, wherein the screen is covered on the shell and encloses an accommodating space, the exciter is arranged in the accommodating space and is abutted to the screen, a magnetic gap is formed between the exciter and the screen, and the exciter vibrates to drive the screen to vibrate and produce sound.

However, in the related art, in order to ensure the magnetic gap, the assembly precision of the exciter is high, which increases the application cost, and in addition, due to the existence of the magnetic circuit attraction of the exciter, the reliability of the screen is also affected, and the requirements of different kinds of screens, such as OLED hard screens, soft screens, LCD and the like, on the exciter are different.

Therefore, there is a need to provide a new sound-emitting driving device to solve the above-mentioned technical problems.

[ Utility model ] content

An object of the utility model is to provide a simple structure, easily equipment and dismouting and good reliability's sound production drive arrangement.

In order to achieve the above object, the present invention provides a sound driving device, which comprises a frame having an accommodation space, a screen and a back cover respectively covering opposite sides of the frame, a middle frame extending from the frame into the accommodation space and located between the screen and the back cover, and an exciter fixed in the accommodation space, wherein the exciter comprises a first housing having a first accommodation space and a second housing having a second accommodation space, the first housing is provided with a first magnet facing the second housing, the second housing is provided with a second magnet and a coil, the second housing comprises a magnetic conductive column for fixing the coil, the second magnet is disposed around the coil at an interval, the exciter comprises a fixing arm extending from the first housing to a position away from the first accommodation space or extending from the second housing to a position away from the second accommodation space, the first shell or the second shell is fixed on the middle frame through the fixing arm and forms detachable connection.

Preferably, the second housing includes a bottom wall located at a middle position, and a side wall extending from an edge of the bottom wall toward the first housing in a bending manner, and the fixing arm is formed by extending from the side wall toward a direction away from the coil.

Preferably, the fixed arm abuts against one side of the middle frame close to the screen.

Preferably, the fixed arm abuts against one side of the middle frame close to the back cover.

Preferably, the fixing arm and the middle frame are fixedly connected through a screw.

Preferably, the fixing arm is provided with a positioning hole, and the screw is inserted into the middle frame from one side of the middle frame close to the back cover and penetrates through the positioning hole, so that the fixing arm is fixed on the middle frame.

Preferably, the fixing arm is arranged at one end of the side wall close to the first shell along the vibration direction.

Preferably, the second casing is rectangular, the side wall includes a first side wall and a second side wall, the first side wall and the second side wall are arranged in parallel, and the first side wall is provided with one fixing arm.

Preferably, the middle frame is provided with a through hole penetrating through the middle frame, and at least part of the second shell is accommodated in the through hole.

Preferably, the actuator further comprises a spring plate connecting the first housing and the second housing.

Preferably, an orthographic projection of one of the fixing arms to the second housing along the direction perpendicular to the vibration direction at least partially coincides with an orthographic projection of the other fixing arm to the second housing along the direction perpendicular to the vibration direction.

Preferably, the first magnet and the second magnet are both permanent magnets.

Preferably, the magnetic conduction column is made of soft magnetic materials.

Compared with the prior art, the utility model discloses a sound production drive arrangement passes through the exciter set up with center fixed connection the second casing, and pass through the second casing the fixed arm with the center is fixed and form and to dismantle the connection, simultaneously, first casing with the screen is connected fixedly. The structure is used for fixing the exciter on the sounding driving device, and the fixed arm and the detachable connecting structure of the middle frame enable the exciter to be easily assembled and disassembled, so that the sounding driving device is good in reliability.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings 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 invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a schematic three-dimensional structure diagram of the sound-producing driving device of the present invention;

fig. 2 is an exploded view of a part of a three-dimensional structure of a sound-generating driving device according to a first embodiment of the present invention;

fig. 3 is a cross-sectional view taken along the line a-a in fig. 1 according to a first embodiment of the present invention;

FIG. 4 is an enlarged partial view of the portion indicated by B in FIG. 3;

fig. 5 is an assembly view of the three-dimensional structure of the exciter and the screen of the sound-generating driving device according to the first embodiment of the present invention;

fig. 6 is an assembly view of the three-dimensional structure of the exciter and the housing of the sound-generating driving device according to the first embodiment of the present invention;

fig. 7 is an exploded view of a part of a three-dimensional structure of a sound-generating driving device according to a second embodiment of the present invention;

fig. 8 is a sectional view taken along the line a-a in fig. 1 according to a second embodiment of the present invention;

FIG. 9 is an enlarged partial view of the portion indicated by C in FIG. 8;

fig. 10 is an assembly view of the three-dimensional structure of the exciter and the screen of the sound-generating driving device according to the second embodiment of the present invention;

fig. 11 is an assembly view of the three-dimensional structure of the exciter and the housing of the sound-generating driving device according to the second embodiment of the present invention;

fig. 12 is a schematic perspective view of an exciter of the sound-generating driving device according to the present invention;

fig. 13 is an exploded perspective view of a part of an exciter of the sound-generating driving device according to the present invention.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-13, the present invention provides a sound driving device 100, which includes a frame 1, a screen 2, a back cover 3, a middle frame 4 and an exciter 5.

The frame 1 has a receiving space 10.

The screen 2 is covered on the frame 1. The screen 2 can be different kinds of screens, such as an OLED hard screen, a soft screen, an LCD, and the like.

The back cover 3 covers the frame 1. The back cover 3 and the screen 2 are respectively covered on two opposite sides of the frame 1. The back cover 3, the screen 2 and the frame 1 together enclose the accommodating space 10.

The middle frame 4 extends from the frame 1 into the accommodating space 10. The middle frame 4 is located between the screen 2 and the back cover 3. The middle frame 4 is used for supporting the exciter 5. Specifically, the middle frame 4 is provided with a through hole 40 penetrating through the middle frame, and the exciter 5 is at least partially accommodated in the through hole 40. The through hole 40 is used for partially penetrating or accommodating the exciter 5 therein, so as to conveniently fix the exciter 5 to the middle frame 4, save space and facilitate assembly and optimization of the whole machine design.

The exciter 5 is fixedly installed in the accommodating space 10. The exciter 5 is used for generating vibration to drive the screen 2 to make sound. Specifically, the exciter 5 includes a first housing 511 having a first receiving space 51 and a second housing 521 having a second receiving space 52, which are oppositely disposed, and in this embodiment, the exciter 5 further includes a spring piece 53 connecting the first housing 511 and the second housing 512.

The first housing 511 is fixed to the screen 2. Specifically, the exciter 5 further includes a first magnet 512 housed in the first housing 511. In this embodiment, the first housing 511 is fixed to the screen 2 by foam or double-sided tape. Of course, the present invention is not limited thereto, and other pasting methods capable of achieving the fixing effect, such as glue, silica gel, etc., are all possible.

In this embodiment, the second housing 521 is fixed to the middle frame 4. Specifically, the actuator 5 further includes a second magnet 522 and a coil 523. In other embodiments, the first housing 511 may be fixed to the middle frame 4.

The second housing 521 is fixedly connected to the middle frame 4. Wherein the second housing 521 is at least partially received in the through hole 40. The second housing 521 includes a bottom wall 5211, a side wall 5212, a fixed arm 5213, and a flux post 5214.

The bottom wall 5211 is positioned at a middle position of the second housing 521.

The side wall 5212 is formed by bending and extending from the edge of the bottom wall 5211 toward the first housing 511. In the present embodiment, the second case 521 has a rectangular shape. The sidewalls 5212 include first sidewalls 5212a arranged in parallel and second sidewalls 5212b connecting the first sidewalls 5212 a. A space formed by the bottom wall 5211 and the side wall 5212 is used for accommodating the second magnet 522 and the coil 523.

The fixed arm 5213 is formed by extending the side wall 5212 away from the coil 523. Specifically, the fixed arm 5213 is disposed at one end of the side wall 5212 close to the first housing 511 in the vibration direction. Wherein each of the first side walls 5212a is provided with one of the fixing arms 5213. That is, the fixed arm 5213 includes two fixed arms 5213, and two fixed arms 5213 are respectively connected to the adjacent one of the first side walls 5212 a. In this embodiment, the fixing arm 5213 and the first side wall 5212a are integrally formed, which facilitates the fixing arm 5213 to fix the exciter 5 to the middle frame 4. Of course, the fixing arm 5213 and the first sidewall 5212a are separate structures, and may be formed by bonding, mortise and tenon joint, or snap-fit.

Preferably, an orthographic projection of one of the fixing arms 5213 on the second housing 521 along the direction perpendicular to the vibration direction at least partially coincides with an orthographic projection of the other fixing arm 5213 on the second housing 521 along the direction perpendicular to the vibration direction. This structure makes the exciter 5 more firmly fixed and simple in structure. In addition, the fixing arm 5213 is fixed to the middle frame 4 along a direction perpendicular to the vibration direction, so that the actuator 5 is not prone to deviation and displacement, and the actuator 5 is more stable in vibration, so that the sound-generating driving device 100 generates sound more optimally.

The actuator 5 is fixed to and detachably connected to the center frame 4 by the fixing arm 5213. This structure makes it easy to assemble, disassemble and replace the exciter 5 in the sound-generating driving device 100. The fixing of the fixing arm 5213 to the middle frame 4 is illustrated by two embodiments.

The first embodiment is as follows: referring to fig. 2-6, the fixed arm 5213 abuts against a side of the middle frame 4 close to the screen 2.

Example two: referring to fig. 7-11, the fixing arm 5213 abuts against a side of the middle frame 4 close to the back cover 3.

Above two kinds of embodiments all can make sound production drive arrangement 100 is easy dismouting, wherein, including whole dismouting or dismouting alone exciter 5 to avoid the risk of damage, improve sound production drive arrangement 100's reliability.

In the present embodiment, the sound-generating drive device 100 further includes a screw 6 to facilitate assembly, disassembly, and replacement of the exciter 5. The fixing arm 5213 is fixedly connected to the middle frame 4 by a screw 6. Through the screw 6 is assembled and disassembled, the operation is simple, and the fixing effect is good. Of course, without limitation, the fixing arm 5213 and the middle frame 4 may be fixed in a tenon-and-mortise structure, a clamping manner, or the like.

Preferably, the fixing arm 5213 is provided with a positioning hole 5210, and the screw 6 is inserted into the middle frame 4 from a side of the middle frame 4 close to the back cover 3 and passes through the positioning hole 5210, so that the fixing arm 5213 is fixed to the middle frame 4. This structure makes the sound-generating drive device 100 easy to mount, and in the assembly process of the sound-generating drive device 100, the side of the screen 2 close to the center frame 4 is first fixed to the first housing 511 of the exciter 5 by adhesion, so that it is difficult to insert the screw 6 from the side of the center frame 4 close to the screen 2, and therefore, the operation of inserting from the side of the center frame 4 close to the back cover 3 is easier, and after the screw 6 is inserted and fixed, the back cover 3 is finally covered.

In order to increase the area of the first housing 511 attached to the screen 2 and to fit the screw 6, in the present embodiment, the first housing 511 includes a first fixing portion 5111 facing the bottom wall 5211 and two second fixing portions 511b extending from opposite sides of the first fixing portion 511 a. This structure makes the first housing 511 be attached to the screen 2 more firmly, and drives the screen 2 to sound more optimally. Preferably, the second fixing portion 511b is provided with an avoiding opening 5110 penetrating therethrough, and the avoiding opening 5110 faces the screw 6. This configuration is advantageous in increasing the area of the first housing 511 attached to the screen 2, and also in preventing the screw 6 from contacting the first housing 511 when the actuator 5 vibrates, thereby improving the reliability of the sound-generating driving device 100.

The magnetically permeable post 5214 is fixed to the bottom wall 5211. In this embodiment, the magnetically permeable pillars 5214 are soft magnetic material.

The second magnet 522 is accommodated in the second case 521.

The coil 523 is housed in the second case 521. The coil 523 is coupled to the magnetically conductive post 5214, in this embodiment, the coil 523 is wound on the magnetically conductive post 5214. The second magnet 522 is disposed at an interval on the periphery side of the coil 523. The first magnet 512 and the second magnet 522 are both permanent magnets and have opposite homopolarities, and before the power is turned on, a repulsive force is generated between the first magnet 512 and the second magnet 522. The coil 523 is energized to generate an electromagnetic field with the second magnet 522, and since the second casing 521 is fixed to the middle frame 4 and is relatively immobile, the coil 523 drives the first casing 511 to vibrate due to electromagnetic force, so that the first casing 511 drives the screen 2 to vibrate and sound.

The elastic piece 53 connects the first housing 511 and the second housing 521. Since the magnetic conductive post 5214 is made of soft magnetic material, an attractive force is generated between the first magnet 512 and the magnetic conductive post 5214, and the supporting force provided by the spring 53 is used for balancing the attractive force with the repulsive force between the first magnet 512 and the second magnet 522 to achieve a balanced state. The elastic sheet 53 makes the magnetic circuit attraction of the exciter 5, so that the first shell 5111 is in a force balance state, the requirement on the screen 2 is reduced, and the screen can adapt to different types of screens, such as an OLED hard screen, a soft screen, an LCD and the like. This structure enables the sound emission driving apparatus 100 to realize applicability to different kinds of screens. Therefore, the exciter 5 has the elasticity of the elastic sheet 53, and is attached to the screen 2 through the first shell 5111, and the second shell 521 and the middle frame 4 have a certain amplitude expansion range due to the structure, so that the exciter 5 is connected like a spring on the whole, and the precision requirement for assembling the screen 2 is reduced. Thereby making the sound-generating driving device 100 more widely applicable.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A sound-producing driving device comprises a frame with an accommodating space, a screen and a back cover which are respectively arranged at two opposite sides of the frame, an exciter which is arranged in the accommodating space and comprises a first shell with a first accommodating space and a second shell with a second accommodating space, wherein the frame extends in the accommodating space and is positioned in the screen and the middle frame between the back cover, the exciter is arranged in the accommodating space, the exciter is characterized in that the exciter comprises a first shell with a first accommodating space and a second shell with a second accommodating space which are oppositely arranged, a first magnet facing the second shell is arranged in the first shell, a second magnet and a coil are arranged in the second shell, the second shell comprises a magnetic conductive column for fixing the coil, the second magnet is arranged at the periphery of the coil at intervals, the exciter comprises a fixed arm which is used for fixing the first shell to be far away from the first accommodating space or is used for fixing the second shell to be far away from the second accommodating space, the first shell or the second shell is fixed on the middle frame through the fixing arm and forms detachable connection.

2. The device according to claim 1, wherein the second housing includes a bottom wall at a middle position, a side wall extending from an edge of the bottom wall in a bending manner toward the first housing, and the fixing arm is formed by extending from the side wall in a direction away from the coil.

3. The sound-emitting driving device according to claim 1, wherein the fixed arm abuts against a side of the middle frame near the screen.

4. The sound-generating driving device as claimed in claim 1, wherein the fixing arm abuts against a side of the middle frame close to the back cover.

5. The sound-emitting driving device according to any one of claims 1-4, wherein the fixed arm is fixed to the middle frame by a screw.

6. The sound-generating driving device as claimed in claim 5, wherein the fixing arm is provided with a positioning hole, and the screw is inserted into the middle frame from a side of the middle frame close to the back cover and passes through the positioning hole, so that the fixing arm is fixed to the middle frame.

7. The apparatus according to claim 2, wherein said fixing arm is provided at an end of said side wall adjacent to said first housing in the vibration direction.

8. The apparatus according to claim 2, wherein said second housing is rectangular, said sidewalls include a first sidewall and a second sidewall, said first sidewall being disposed in parallel with each other and connected to said first sidewall, and each of said first sidewalls is provided with one of said fixing arms.

9. The apparatus according to claim 1, wherein the center frame has a through hole extending therethrough, and the second housing is at least partially received in the through hole.

10. The apparatus according to claim 1, wherein the actuator further comprises a spring connecting the first housing and the second housing.

11. The sound-producing drive device according to claim 8, wherein an orthographic projection of one of said fixed arms to said second housing in a direction perpendicular to the direction of vibration at least partially coincides with an orthographic projection of the other of said fixed arms to said second housing in a direction perpendicular to the direction of vibration.

12. The apparatus according to claim 1, wherein said first and second magnets are permanent magnets.

13. The voice activated device of claim 1, wherein the magnetically permeable posts are made of a soft magnetic material.