CN110972039A

CN110972039A - Auxiliary support and vibration sound production device assembly

Info

Publication number: CN110972039A
Application number: CN201911425516.XA
Authority: CN
Inventors: 毛东升; 史德璋; 刘光辉; 王永强
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-07

Abstract

The invention discloses an auxiliary support and a vibration sounding device assembly, wherein a middle cavity is arranged in the auxiliary support, the middle cavity is provided with a first positioning position and a second positioning position which are arranged on the axis of the middle cavity at intervals, the first positioning position is used for positioning a magnetic circuit assembly of the vibration sounding device, the second positioning position is used for positioning a coil assembly of the vibration sounding device, and the outer periphery of the magnetic circuit assembly and the outer periphery of the coil assembly are both abutted against the cavity wall of the middle cavity. The technical scheme of the invention can improve the assembly efficiency of the vibration sounding device product.

Description

Auxiliary support and vibration sound production device assembly

Technical Field

The invention relates to the technical field of electroacoustic equipment, in particular to an auxiliary support and a vibration sounding device assembly.

Background

At present, the full-screen technology has been successfully applied to electronic devices, and has become a popular trend, wherein the screen sounding technology is the key to realizing the full-screen technology. Implementations of screen sound production include direct drive. The direct-drive screen sounder adopts a split structure, a magnetic circuit component and a coil component are separated, the screen is used as an elastic component, and the screen is pushed to sound by utilizing the electromagnetic principle. For such a direct-drive structure, it is necessary to ensure the magnetic circuit component and the coil component are aligned, otherwise the performance of the product is seriously affected. However, the magnetic circuit component and the coil component are usually stored and transported in a loose piece manner, and are centered when the product is assembled, so that the centering effect is good, the instant centering process between the magnetic circuit component and the coil component is slow, and the assembly efficiency of the product is low.

Disclosure of Invention

The invention mainly aims to provide an auxiliary bracket, aiming at improving the assembly efficiency of a vibration sounding device product.

In order to achieve the above purpose, the auxiliary support provided by the present invention is provided with a middle cavity, the middle cavity has a first positioning position and a second positioning position which are arranged on an axis of the middle cavity at an interval, the first positioning position is used for positioning a magnetic circuit component of the vibration sound-generating device, the second positioning position is used for positioning a coil component of the vibration sound-generating device, and an outer periphery of the magnetic circuit component and an outer periphery of the coil component are both abutted against a cavity wall of the middle cavity.

Optionally, the auxiliary support is in a cylindrical shape with an opening at one end, and the middle cavity is an inner cavity of the auxiliary support.

Optionally, the first positioning position is located at an open end of the auxiliary support, and the second positioning position is located at a closed end of the auxiliary support.

Optionally, the side wall of the auxiliary support is provided with an installation notch penetrating through the end face of the open end of the auxiliary support, and the installation notch is used for the lead wire and/or the extension fixing part of the coil assembly to move in and out.

Optionally, a chamfer is provided between the inner wall surface of the auxiliary support and the open end surface of the auxiliary support, and/or between the opening wall surface of the mounting notch and the open end surface of the auxiliary support.

Optionally, a limiting portion is further disposed in the auxiliary support, the limiting portion has a limiting surface facing the opening end of the auxiliary support, and the limiting surface is used for supporting and limiting a magnet of the magnetic circuit assembly.

Optionally, the limiting part is a supporting boss protruding from the closed end of the auxiliary support towards the open end, and the lower shell of the coil assembly corresponds to the supporting boss and is provided with an avoiding notch.

Optionally, a magnetic element is embedded in the limiting portion, and the magnetic element is magnetically attracted to the magnet of the magnetic circuit component.

Optionally, the magnetic attraction member is a magnetic metal member.

The invention further provides a vibration sounding device assembly which comprises a magnetic circuit assembly, a coil assembly and the auxiliary support, wherein the outer periphery of the magnetic circuit assembly and the outer periphery of the coil assembly are both abutted against the cavity wall of the middle cavity of the auxiliary support, the magnetic circuit assembly is positioned at a first positioning position of the middle cavity, and the coil assembly is positioned at a second positioning position of the middle cavity.

In the technical scheme of the invention, before the vibration sound-generating device product is assembled, the magnetic circuit component and the coil component can be connected into one component through the auxiliary support, and the outer periphery of the magnetic circuit component and the outer periphery of the coil component are both abutted against the cavity wall of the centering cavity, so that the centering cavity of the auxiliary support can simultaneously limit the installation positions of the magnetic circuit component and the coil component and determine the relative position between the magnetic circuit component and the coil component, the magnetic circuit component and the coil component can not slide along the positions except the axial direction of the centering cavity, the phenomenon of misalignment caused by the position slippage of the magnetic circuit component and the coil component along the non-relative movement direction can be avoided in the storage and transportation processes of the magnetic circuit component and the coil component, the magnetic circuit component and the coil component can be assembled in a centered state without the need of immediate centering of the magnetic circuit component and the coil component, and then the assembly efficiency of the vibration sounding device product is improved. Of course, after the magnetic circuit assembly and the coil assembly are assembled on the vibration sound production device product, the auxiliary bracket is usually removed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a vibration sound-generating device according to an embodiment of the present invention;

fig. 2 is an exploded view of the vibration sound-producing device of fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Magnetic circuit assembly	11	Magnet assembly
111	Permanent magnet	12	Upper casing
				20	Coil component	21	Coil
22	Lower casing	23	Lead wire
				221	Avoiding gap	222	Extension fixing part
30	Auxiliary support	31	Limiting part
				32	Magnetic part	301	To the middle cavity
302	Mounting notch	303	Chamfering

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides an auxiliary support.

Referring to fig. 1 and 2, in one embodiment of the present invention, the auxiliary stand is used to assist in the production of a vibration sound-generating device.

The vibration sound generating apparatus generally includes a vibrating member, a fixing member, a magnetic circuit assembly 10, and a coil assembly 20. One of the magnetic circuit assembly 10 and the coil assembly 20 is fixedly connected to the vibrating member, and the other is fixedly connected to the fixing member. In this embodiment, the vibrating member may be a screen of an electronic device to which the vibration sound generating apparatus is applied or a rear cover opposite to the screen. The following description will take the vibrating member as an example of a screen. The fixing member may be a fixing component of the electronic device to which the vibration sound generating apparatus is applied, such as a middle frame, a circuit board, a side wall, and the like of the electronic device, or may be a separately configured fixed component. It will be appreciated that the coil assembly 20 will continue to generate heat during energization. If the coil block 20 is fixedly connected to the screen, the screen is easily damaged by heat. In this embodiment, the magnetic circuit assembly 10 is connected to the screen, and the coil assembly 20 is fixedly connected to the fixing member instead of being connected to the screen, so that the damage to the screen caused by the heat generated by the coil assembly 20 can be effectively avoided.

In this embodiment, a centering cavity 301 is disposed in the auxiliary support 30, and the centering cavity 301 has a first positioning position and a second positioning position that are disposed at an interval on an axis thereof, where the first positioning position is used for positioning the magnetic circuit assembly 10, the second positioning position is used for positioning the coil assembly 20, and an outer periphery of the magnetic circuit assembly 10 and an outer periphery of the coil assembly 20 are both abutted against a cavity wall of the centering cavity 301.

In the technical scheme of the invention, before the vibration sound-generating device product is assembled, the magnetic circuit component 10 and the coil component 20 can be connected into one component through the auxiliary support 30, and because the outer periphery of the magnetic circuit component 10 and the outer periphery of the coil component 20 are both abutted against the cavity wall of the centering cavity 301, so that the centering cavity 301 of the auxiliary support 30 can simultaneously limit the installation positions of the magnetic circuit component 10 and the coil component 20, determine the relative position between the two, can ensure that the magnetic circuit component 10 and the coil component 20 can not slide along the position except the axial direction of the centering cavity 301, thereby avoiding the phenomenon of misalignment caused by the position sliding of the magnetic circuit component 10 and the coil component 20 in the non-relative movement direction in the storage and transportation processes of the magnetic circuit component 10 and the coil component 20, further ensuring that the magnetic circuit component 10 and the coil component 20 can be assembled in a centered state, without the need for immediate centering of the magnetic circuit assembly 10 and the coil assembly 20, which in turn improves the assembly efficiency of the vibration sound generating device product. Of course, after the magnetic circuit assembly 10 and the coil assembly 20 are assembled to the vibration sound generating apparatus product, the auxiliary bracket 30 is usually removed.

Further, the auxiliary support 30 is in a cylindrical shape with one end open, and the middle cavity 301 is an inner cavity of the auxiliary support 30. However, the design is not limited thereto, and in other embodiments, the auxiliary stand 30 may be disposed in a cylindrical shape with two open ends. Of course, when only one end of the auxiliary support 30 is open, only one of the magnetic circuit assembly 10 and the coil assembly 20, which is closer to the open end of the auxiliary support 30, is required to be fixed to the auxiliary support 30, so that the other one can be limited from being separated from the open end of the auxiliary support 30, and the structure is simpler; in addition, the auxiliary support 30 can provide protection for the magnetic circuit assembly 10 and the coil assembly 20.

Further, the first positioning position is located at the open end of the auxiliary support 30, and the second positioning position is located at the closed end of the auxiliary support 30. That is, the magnetic circuit assembly 10 is positioned at the open end of the sub-mount 30, and the coil assembly 20 is positioned at the closed end of the sub-mount 30. It can be understood that, in general, the outer peripheral edge of the magnet assembly 10 has a thicker thickness than the outer peripheral edge of the coil assembly 20, so it is easier to load the coil assembly 20 having a thinner outer peripheral edge into the closed end of the subsidiary bracket 30. Of course, in other embodiments, the first positioning position and the second positioning position may be exchanged.

Further, the side wall of the auxiliary stand 30 is provided with a mounting notch 302 penetrating the end face of the open end thereof. Generally, the coil block 20 includes a lower case 22 and a coil 21 fixedly secured to the lower case 22; it will be appreciated that the provision of the lower shell 22 provides a mounting attachment for the coil 21; alternatively, the lower case 22 is provided in a plate shape, which is simple in structure and easy to manufacture. The periphery of the lower shell 22 abuts the inner cavity of the auxiliary holder 30. Generally, the lower case 22 is further provided with an extension fixing portion 222 fixedly connected with the fixing member, and the extension fixing portion 222 and the lead wire 23 of the coil 21 are movably inserted into and removed from the mounting notch 302. In this embodiment, the leads 23 of the coil 21 are optionally provided as a flexible circuit board, which is convenient for printing a desired circuit thereon, and a plurality of circuits can be integrated together for assembly; of course, it is also possible to use ordinary wires. Optionally, the extension fixing portion 222 may be, but not limited to, provided with a fixing hole for a fixing element such as a screw or a rivet to pass through; of course, other connecting structures such as a snap may be provided on the extension fixing portion 222.

Further, a chamfer 303 is provided between the inner wall surface of the auxiliary support 30 and the end surface of the open end of the auxiliary support 30, so that the magnetic circuit assembly 10 and the coil assembly 20 can enter the centering cavity 301 from the open end of the auxiliary support 30.

Similarly, a chamfer 303 is provided between the opening wall surface of the mounting recess 302 and the end surface of the opening end of the auxiliary holder 30, so as to facilitate the extension of the fixing portion 222 and the lead 23 into the mounting recess 302.

Further, a limiting portion 31 is further disposed in the auxiliary bracket 30, the limiting portion 31 has a limiting surface facing the opening end of the auxiliary bracket 30, and the limiting surface is used for supporting and limiting the magnet of the magnetic circuit assembly 10, so as to limit the distance between the magnet assembly 10 and the lower shell 22.

Further, the limiting portion 31 is a supporting boss protruding from the closed end of the auxiliary bracket 30 toward the open end. However, the design is not limited thereto, and in other embodiments, the position-limiting portion 31 may be a supporting plate protruding from the side wall of the auxiliary stand 30, and a space is formed between the supporting plate and the closed end of the auxiliary stand 30. It can be understood that in the scheme that the limiting portion 31 is arranged as the supporting boss, the auxiliary support 30 can be conveniently subjected to injection molding, the supporting boss can be molded in a direct mold opening mode, and particularly, the supporting boss can be molded without core pulling. Optionally, the supporting boss is further connected with the side wall of the auxiliary support 30, that is, the supporting boss is disposed at the joint of the side wall of the auxiliary support 30 and the closed end wall of the auxiliary support 30, so that the auxiliary support 30 has better structural strength and is less prone to deformation, thereby avoiding deformation of the middle cavity 301, and further ensuring that the centering effect between the magnetic circuit assembly 10 and the coil assembly 20 is good.

In addition, the lower case 22 is provided with an escape notch 221 corresponding to the support boss. In an embodiment, optionally, the cross section of the inner cavity of the auxiliary support 30 (the pair of middle cavities 301) is substantially rectangular, two supporting bosses are respectively formed on two opposite long sides of the inner cavity of the auxiliary support 30, correspondingly, two opposite long sides of the plate-shaped lower shell 22 are respectively provided with one avoidance notch 221, and two short sides of the lower shell 22 and wide ends of the two long sides (the positions where the avoidance notches 221 are provided are narrower) are abutted to the cavity wall of the inner cavity of the auxiliary support 30. Optionally, a gap is formed between the avoiding notch 221 and the supporting boss; in this way, the abutting position of the lower shell 22 with the auxiliary bracket 30 during assembly can be reduced, so that the position where friction is likely to occur is reduced, and the lower shell 22 can enter and exit the middle cavity 301 more conveniently; however, the design is not limited thereto, and in other embodiments, the avoiding notch 221 may abut against the supporting boss.

Further, the limiting portion 31 is embedded with a magnetic member 32, and the magnetic member 32 is magnetically attracted with the magnet of the magnetic circuit assembly 10, so that the magnetic circuit assembly 10 is prevented from being separated from the auxiliary bracket 30 during storage and transportation, and the auxiliary bracket 30 is separated from the magnetic circuit assembly 10 and the coil assembly 20 after the magnetic circuit assembly 10 is assembled with the vibrating member and the coil assembly 20 is assembled with the fixing member, so as to detach the auxiliary bracket 30. In this embodiment, optionally, the magnetic attraction member 32 is a magnetic metal member to reduce the cost; of course, in other embodiments, the magnetic member 32 can be a magnetic member with its own magnetism.

In the present embodiment, the magnetic circuit assembly 10 optionally includes two magnet sets 11, where the two magnet sets 11 are disposed oppositely and spaced apart to form a magnetic gap between the two magnet sets 11; correspondingly, two opposite and spaced limiting parts 31 are arranged in the auxiliary bracket 30, one magnet assembly 11 is abutted with the limiting surface of one limiting part 31, and the other magnet assembly 11 is abutted with the limiting surface of the other limiting part 31. In this embodiment, the coil 21 is movably disposed in the magnetic gap, and one annular end surface of the coil 21 faces one magnet assembly 11, and the other annular end surface faces the other magnet assembly 11.

Optionally, the magnetic circuit assembly 10 further includes an upper case 12 fixedly coupled to the vibrating member, and the two magnet groups 11 are mounted to the upper case 12. It can be understood that the addition of the upper case 12 can improve the assembly efficiency by assembling the magnetic circuit assembly 10 into an integral module and then integrally mounting the magnetic circuit assembly on the auxiliary bracket 30. In addition, when the upper case 12 is made of a magnetic conductive material, the upper case 12 can also perform a magnetic conductive function, thereby improving the performance of the magnetic circuit assembly 10.

Optionally, the upper case 12 is in a cylindrical shape with an open end, the closed end of the upper case 12 is fixedly connected to the vibrating member, and the two magnet assemblies 11 are disposed in the upper case 12, so that the side wall of the upper case 12 can provide positioning and installation for the magnet assemblies 11, the relative positions of the two magnet assemblies 11 are more stable, and in addition, the side wall of the upper case 12 can also provide protection for the magnet assemblies 11. In this embodiment, the open end of the upper casing 12 is inserted into the inner cavity of the auxiliary support 30, and the outer peripheral surface of the upper casing 12 is in contact with the inner peripheral surface of the auxiliary support 30, so that the outer periphery of the magnetic circuit assembly 10 is in contact with the inner wall of the middle cavity 301, and the magnetic circuit assembly 10 is prevented from being inclined, and the centering effect between the magnetic circuit assembly 10 and the coil assembly 20 is improved. However, the design is not limited thereto, and in other embodiments, the upper shell 12 may be disposed in a plate shape.

In this embodiment, optionally, the magnet assembly 11 is a halbach magnet. Further optionally, the magnet assembly 11 includes three permanent magnets 111 stacked one on another, and the magnetization directions of the permanent magnets 111 at two ends are perpendicular to the extending direction (i.e. the vibration direction) of the middle cavity 301, and the magnetization directions are opposite; the magnetizing direction of the permanent magnet 111 in the middle is parallel to the extending direction of the middle cavity 301; therefore, the magnetic field intensity in the magnetic gap is larger, the vibration driving force is larger, and the vibration starting speed is high. Of course, the number of the permanent magnets 111 of the magnet group 11 is not limited to 3, and may be more; the magnetizing directions of the permanent magnets 111 at both ends of each magnet group 11 are perpendicular to the extending direction of the middle cavity 301, and are opposite; the magnetizing direction of the permanent magnet 111 in the middle part is parallel to the extending direction of the middle cavity 301, and the magnetic fields of the permanent magnets 111 are in paramagnetic connection with each other.

The invention further provides a vibration sound-generating device assembly, which comprises a magnetic circuit assembly, a coil assembly and an auxiliary support, the specific structure of the auxiliary support refers to the above embodiments, and the vibration sound-generating device assembly adopts all technical schemes of all the above embodiments, so that the vibration sound-generating device assembly at least has all the beneficial effects brought by the technical schemes of the above embodiments, and the details are not repeated herein. The outer periphery of the magnetic circuit assembly and the outer periphery of the coil assembly are both abutted to the cavity wall of the middle cavity of the auxiliary support, the magnetic circuit assembly is positioned at the first positioning position of the middle cavity, and the coil assembly is positioned at the second positioning position of the middle cavity.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The auxiliary support is characterized in that a middle cavity is arranged in the auxiliary support, the middle cavity is provided with a first positioning position and a second positioning position which are arranged on the axis of the middle cavity at intervals, the first positioning position is used for positioning a magnetic circuit assembly of a vibration sound-generating device, the second positioning position is used for positioning a coil assembly of the vibration sound-generating device, and the outer periphery of the magnetic circuit assembly and the outer periphery of the coil assembly are abutted to the cavity wall of the middle cavity.

2. The auxiliary support of claim 1, wherein the auxiliary support is in a cylindrical shape with one end open, and the centering cavity is an inner cavity of the auxiliary support.

3. The accessory bracket of claim 2, wherein the first detent position is located at an open end of the accessory bracket and the second detent position is located at a closed end of the accessory bracket.

4. The auxiliary support of claim 3, wherein the side wall of the auxiliary support is provided with a mounting notch penetrating through the end face of the open end of the auxiliary support, and the mounting notch is used for the lead wire and/or the extension fixing part of the coil assembly to move in and out.

5. An auxiliary holder according to claim 4, wherein a chamfer is provided between an inner wall surface of the auxiliary holder and an open end surface of the auxiliary holder, and/or between an opening wall surface of the mounting notch and the open end surface of the auxiliary holder.

6. An auxiliary support as claimed in any one of claims 3 to 5, wherein a position-limiting portion is further provided in the auxiliary support, the position-limiting portion has a position-limiting surface facing the opening end of the auxiliary support, and the position-limiting surface is used for supporting and limiting the magnet of the magnetic circuit assembly.

7. The auxiliary support of claim 6, wherein the limiting portion is a supporting boss protruding from the closed end of the auxiliary support toward the open end, and the lower shell of the coil assembly is provided with an avoiding notch corresponding to the supporting boss.

8. The auxiliary stand according to claim 7, wherein a magnetic member is embedded in the position-limiting portion, and the magnetic member is magnetically attracted to the magnet of the magnetic circuit assembly.

9. The accessory bracket of claim 8, wherein the magnetically attractive element is a magnetic metal element.

10. A vibration sound generating device assembly comprising a magnetic circuit assembly, a coil assembly, and the auxiliary support as claimed in any one of claims 1 to 9, wherein the outer periphery of the magnetic circuit assembly and the outer periphery of the coil assembly are in abutment with the cavity wall of the middle cavity of the auxiliary support, and the magnetic circuit assembly is positioned at a first positioning position of the middle cavity and the coil assembly is positioned at a second positioning position of the middle cavity.