CN211089954U

CN211089954U - Exciter and electronic product

Info

Publication number: CN211089954U
Application number: CN201922495864.6U
Authority: CN
Inventors: 毛东升; 史德璋; 王永强; 高文花
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-24
Anticipated expiration: 2029-12-31

Abstract

The utility model provides an exciter and electronic product. The exciter includes: a magnetic circuit assembly including a first housing and a magnet assembly disposed within the first housing; the coil assembly comprises a second shell and a coil, the magnet assembly forms a magnetic gap, and the coil penetrates through the magnetic gap and is connected to the second shell; the coil assembly is configured to generate vibration relative to the magnetic circuit assembly; at least one fixing frame, the fixing frame is respectively connected with the coil and the second shell. The utility model discloses a mount of being connected with coil and second casing respectively increases the area of being connected of coil and second casing to improve the joint strength of coil and second casing.

Description

Exciter and electronic product

Technical Field

The utility model relates to an acoustics technical field, more specifically, the utility model relates to an exciter and electronic product.

Background

With the advent of the mobile internet era, the number of smart devices has increased. People have stronger requirements on the full-face screen of the intelligent equipment. No matter it is split type or integral type directly drive screen sound production exciter, owing to can produce superstrong stereo effect, experience for the user provides the acoustics of high-quality, can not occupy the screen space of smart machine moreover, consequently directly drive the application of screen sound production exciter more and more extensively.

At present, the assembly modes of coils in a direct-drive screen sounding exciter are divided into vertical assembly and horizontal assembly, and the different assembly modes can cause different structures of the whole product. In the vertical assembly, the connecting area of the coil and the shell or other parts is small, so that the connecting strength of the coil is low, the risk of coil falling exists, and the use reliability of the direct-drive screen sound-generating exciter is greatly reduced.

Therefore, it is necessary to improve the conventional exciter to solve the problem of low connection strength of the vertical coil.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an exciter solves the problem that current vertical coil connection reliability is low.

Another object of the present invention is to provide an electronic product, which includes the above-mentioned exciter.

An actuator, comprising:

a magnetic circuit assembly including a first housing and a magnet assembly disposed within the first housing;

the coil assembly comprises a second shell and a coil, the magnet assembly forms a magnetic gap, and the coil penetrates through the magnetic gap and is connected to the second shell;

the coil assembly is configured to generate vibration relative to the magnetic circuit assembly;

at least one fixing frame, the fixing frame is respectively connected with the coil and the second shell.

Optionally, the fixing frame includes a coil connecting portion and at least one supporting leg, which are integrally disposed, at least one surface of the coil connecting portion is connected to the coil, and the supporting leg is connected to the second housing.

Optionally, the coil connecting part is connected to the coil by an adhesive, and the supporting leg is connected and fixed to the second housing by a welding method.

Optionally, the coil connecting portion is configured to be an L-shaped structure, the transverse side of the L-shaped structure is attached to the inner side of the winding hole of the coil, the vertical side of the L-shaped structure is attached to the outer side of the coil, and the outer side is perpendicular to the inner side of the winding hole.

Optionally, the coil connecting portion is configured as a flat plate structure, and a flat plate surface of the flat plate structure is attached to the coil.

Optionally, the fixing frame includes a plurality of supporting legs, and the plurality of supporting legs are distributed on two sides of the flat plate structure.

Optionally, the coil connecting portion is a groove structure, and the coil is inserted into the groove structure.

Optionally, a blind groove is formed in the second shell at the joint of the supporting legs, and the supporting legs are embedded into the blind groove.

Optionally, the exciter comprises two fixing frames, and the two fixing frames are arranged on two sides of the coil and symmetrically arranged relative to the coil.

An electronic product, comprising the above-mentioned exciter,

a fixing member;

a vibrating member configured to be capable of vibrating with respect to the fixing member;

one of the first case and the second case is connected to the vibrating member, and the other of the first case and the second case is connected to the fixing member.

Technical scheme's beneficial effect lies in: the fixed frames respectively connected with the coil and the second shell are arranged in the exciter to increase the connection area of the coil and the second shell, so that the connection strength of the coil and the second shell is improved.

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

Drawings

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

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

fig. 2 is a cross-sectional view of an exciter according to an embodiment of the present invention without a first housing installed;

fig. 3 is a schematic structural view of an upper avoidance groove of a second magnet pair according to an embodiment of the present invention;

fig. 4 is a schematic view of a magnetizing direction of a magnet according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a fixing frame according to an embodiment of the present invention;

fig. 6 is a partial exploded view of an actuator according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of an exciter according to an embodiment of the present invention without a first housing installed;

fig. 8 is a partial exploded view of an actuator according to an embodiment of the present invention;

fig. 9 is a cross-sectional view of an exciter according to an embodiment of the present invention without a first housing installed;

fig. 10 is a partial exploded view of an actuator according to an embodiment of the present invention;

fig. 11 is a cross-sectional view of an exciter according to an embodiment of the present invention without a first housing installed;

the figures are labeled as follows: 10 a first housing; 20 coils; 30 magnets; 301 a first pair of magnets; 302 a second magnet pair; 3021, mixing the components together; a first avoidance slot; 3022, mixing the components together; a second avoidance slot; 40 magnetic conductive plates; 50 an elastic member; 60 fixing frames; 601 a coil connecting portion; 602 supporting a foot; 70 a second housing; 701 blind grooves; 80 a flexible circuit board; 90 stop blocks.

Detailed Description

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

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

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

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

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

At present, the assembly modes of coils in a direct-drive screen sounding exciter are divided into vertical assembly and horizontal assembly, and the different assembly modes can cause different structures of the whole product. In the vertical assembly, the connecting area of the coil and the shell or other parts is small, so that the connecting strength of the coil is low, the risk of coil falling exists, and the use reliability of the direct-drive screen sound-generating exciter is greatly reduced. Therefore, it is necessary to improve the conventional exciter to solve the problem of low connection strength of the vertical coil.

The utility model provides an exciter, include: a magnetic circuit assembly including a first housing and a magnet assembly disposed within the first housing; the coil assembly comprises a second shell and a coil, the magnet assembly forms a magnetic gap, and the coil penetrates through the magnetic gap and is connected to the second shell; the coil assembly is configured to generate vibration relative to the magnetic circuit assembly; at least one fixing frame, the fixing frame is respectively connected with the coil and the second shell.

As an embodiment of the present invention, the exciter may be a split type. The split exciter comprises a magnetic circuit assembly and a coil assembly. The magnetic circuit assembly includes a first housing and a magnet assembly. The magnet assembly is disposed within the first housing. Optionally, the magnet assembly comprises a magnet and a magnetically permeable plate. The first housing may constitute an outer shell of the exciter for protecting the internal components of the exciter. The magnets are used to generate the magnetic field required for vibration and form a magnetic gap. The coil assembly includes a coil and a second housing. The coil is connected to the second housing through the magnetic gap. After the electric signal is introduced into the coil, the coil vibrates in the magnetic gap under the action of the magnetic field, and simultaneously drives the second shell connected with the coil to vibrate. I.e. the coil assembly is capable of generating vibrations relative to the magnetic circuit assembly.

As another embodiment of the present invention, the exciter may also be an integral exciter. As shown in fig. 1, the integrated actuator includes a magnetic circuit assembly and a coil assembly. Wherein the magnetic circuit assembly comprises a first housing 10 and a magnet assembly, the magnet assembly being arranged within the first housing. Optionally, the magnet assembly includes a magnet 30 and a magnetically permeable plate 40. The first housing may constitute an outer shell of the exciter for protecting the internal components of the exciter. The magnets are used to generate the magnetic field required for vibration and form a magnetic gap. Optionally, the magnetic conductive plate is made of low-carbon steel material and used for magnetic conduction. The magnet 30 is connected to the first casing 10, and the magnetic conductive plate 40 is connected to the magnet. In one embodiment, the magnet is connected to the first housing through an upper surface thereof, and the magnetic conductive plate is connected to a surface of the magnet away from the first housing. The coil assembly of the present invention includes a second housing 70 and a coil 60. The second housing also forms the housing of the exciter. The utility model discloses in, the coil adopts vertical assembly. The coil is connected to the second housing through a magnetic gap formed by the magnet. After the electric signal is introduced into the coil, the coil vibrates in the magnetic gap under the action of the magnetic field, and simultaneously drives the second shell connected with the coil to vibrate. Optionally, the actuator further comprises a resilient member 50. The magnetic circuit component is connected to the elastic component through the magnet component. In one embodiment, the magnet is connected to the elastic member by a magnetic conductive plate 40. The coil assembly is connected to the elastic member through the second housing 70. Optionally, the elastic member is provided with a middle fixing area and a corner fixing area. The middle fixing area is used for connecting the magnetic conduction plate, and the corner fixing areas are used for being connected with the second shell. Optionally, the integrated exciter further comprises a stopper 90, and the upper and lower end surfaces of the stopper are respectively connected to the corner fixing area of the elastic member and the second housing. The stopper is used for increasing the height difference between the elastic piece and the second shell. The middle fixing area and the corner fixing area are connected through a narrow strip structure capable of generating elastic deformation. The elastic member allows the magnetic circuit assembly and the coil assembly to be relatively displaced by being elastically deformed. That is, the coil vibrates with respect to the magnet, so that the elastic member is elastically deformed.

Optionally, the exciter further comprises at least one mount 60 connecting the coil 20 and the second housing 70. The fixing frame is used for increasing the connecting area of the coil and the second shell and improving the connecting strength of the coil and the second shell.

Optionally, the actuator further includes a flexible circuit board (FPCB)80 forming an integrated circuit with integrated electrical components for circuit control of the actuator. As an embodiment, the FPCB may be disposed between the coil 20 and the second housing 70, the coil being first connected to the FPCB, and then the side of the FPCB remote from the coil being connected to the second housing. The use of the FPCB can make good use of irregular spaces in the exciter, contributing to improvement of space utilization.

The utility model discloses in, increase the area of being connected of coil and second casing through the mount 60 that sets up respectively to be connected with coil 20 and second casing 70 in the exciter to improve the joint strength of coil and second casing, improve the use reliability of exciter.

Alternatively, the magnet assembly comprises two pairs of magnets arranged one above the other, that is, the magnet assembly comprises four magnets of the same shape in pairs, as shown in fig. 4. Wherein, the two magnets arranged above, that is, the first magnet pair 301 in fig. 4 have the same magnetizing direction, and are both perpendicular to the vibration direction of the coil 20; the two magnets arranged below, i.e. the second magnet pair 302 in fig. 4, are oppositely charged and are parallel to the vibration direction of the coil. The magnetizing directions of the four magnets follow the halbach principle and can generate the strongest magnetic field intensity acting on the coil. Under the arrangement mode, the vibration amplitude of the coil can be increased, and the vibration performance of the exciter is improved.

Alternatively, as shown in fig. 3, the second magnet pair 302 is provided with an escape groove on a side surface close to the coil 20. That is, the escape grooves are formed on the surfaces of the two magnets on the side close to the coil. A first avoidance groove 3021 is provided for avoiding the leading and trailing ends of the coil. The coil is wound from a wire so that the coil presents a start end and an end. The start terminal and the end terminal need to be led out from the coil to be electrically connected with an external circuit so as to provide electric signals for the coil. Set up first dodge the groove on magnet and can draw out for the end of a thread end and end of a thread end follow coil and provide the space, reduce coil and magnet electricity and connect the risk. Optionally, the first avoiding groove is arranged on the magnet at a position close to two ends of the magnet. Therefore, the starting line end and the tail line end of the coil can be arranged at two ends of the coil, and the influence of the starting line end and the tail line end on the vibration of the coil is reduced. Optionally, the avoidance groove comprises a second avoidance groove 3022 for avoiding the mount. The opening position of the second avoiding groove on the magnet is matched with the mounting position of the fixing frame.

In the present invention, as shown in fig. 5, the fixing frame 60 includes a coil connecting portion 601 and at least one supporting leg 602. As an embodiment, the coil connecting portion is provided integrally with the support leg. Optionally, at least one surface of the coil connecting portion is connected to the coil 20, and the supporting leg is connected to the second housing 70. The coil connecting part is used for clamping the coil and providing support for the coil. The supporting legs are used for increasing the connecting area of the coil and the second shell so as to improve the connecting stability of the coil and the second shell.

In one embodiment, the coil connecting portion 601 is connected to the coil 20 by gluing, and the supporting leg 602 is connected and fixed to the second housing 70 by welding. The coil connecting part and the coil are connected in an adhesive mode, so that the connecting mode of the fixing frame and the coil can be simplified. The supporting legs are fixedly connected with the second shell in a welding mode, so that the connection strength of the fixing frame and the second shell can be obviously improved, and the fixing frame can stably support the coil.

The technical solution of the present invention will be further illustrated by the following examples.

Example one

As shown in fig. 1 or 2, the actuator includes a first housing 10, a magnet assembly, an elastic member 50, a coil 20, a second housing 70, a flexible circuit board 80, and the like. Wherein the magnet assembly is disposed within the first housing. The coil is connected to the second housing through the flexible circuit board. The magnet assembly is connected to the elastic member. The relative displacement of the magnetic circuit assembly and the coil assembly is achieved by elastic deformation of the elastic member.

In this embodiment, the exciter further includes two fixing frames 60, which are respectively disposed at two sides of the coil 20 in the thickness direction and symmetrically disposed with respect to the coil, optionally, the fixing frames include a coil connecting portion 601 and a supporting leg 602, optionally, as shown in fig. 1, 2, or 5, the coil connecting portion is set in a L-shaped structure, and a transverse side of a L-shaped structure is attached to an inner side surface of a winding hole of the coil, the winding hole of the coil is a hole left in a portion of the coil when the coil is wound, a vertical side of a L-shaped structure is attached to an outer side surface of the coil, and the outer side surface is adjacent to and perpendicular to the inner side surface of the winding hole.

The supporting legs 602 of the fixing frame are connected to the second casing 70, and the positions of the flexible circuit board 80 corresponding to the supporting legs form a concave structure for avoiding the supporting legs. Optionally, in the second magnet pair 302, a second avoiding groove 3022 is provided on a side surface of the magnet close to the coil. The second avoidance groove is used for providing an installation space for the fixing frame. Optionally, referring to fig. 1 or 6, a blind groove 701 is formed at a joint of the support leg on the second housing, and the support leg is embedded in the blind groove. The number of the blind grooves is adapted to the number of the supporting feet. The depth of the blind groove can be set to be equal to the thickness of the supporting leg, so that after the supporting leg is embedded and installed in the blind groove, the supporting leg does not protrude out of the surface of the second shell, and a space can be provided for installing other components in the exciter. Optionally, as shown in fig. 1 or fig. 6, each fixing frame is provided with only one supporting foot, and at this time, the size of the supporting foot is larger, that is, the connecting area with the second housing is larger, and this design mode can improve the connecting strength between the supporting foot and the second housing. Optionally, after the supporting legs are embedded into the blind grooves, the supporting legs and the second shell are fixedly connected through a welding process. The supporting legs and the second shell are welded, so that the connecting strength of the supporting legs and the second shell can be further improved. The person skilled in the art can also adopt other processes to make the supporting legs and the second shell form a fixed connection, and the present invention does not limit this.

The fixing frame 60 in this embodiment can not only increase the connection area between the coil 20 and the second housing 70 and improve the connection strength of the coil, but also effectively prevent the coil from deflecting, thereby forming a stable support for the coil and improving the reliability of the coil connection. In addition, the fixing frame is simple in structure, low in manufacturing cost, good in using effect and beneficial to popularization and application.

Example two

In this embodiment, the exciter differs from the first embodiment in the structure of the fixing frame.

Specifically, as shown in fig. 8 or 9, the exciter includes a fixing frame 60, which includes a coil connecting portion 601 and a plurality of supporting legs 602, as an embodiment, the coil connecting portion is configured in an L-shaped structure, a lateral edge of the L-shaped structure is attached to an inner side of a winding hole of the coil 20, a vertical edge of the L-shaped structure is attached to an outer side of the coil, and the outer side is adjacent to and perpendicular to the inner side of the winding hole, so that two adjacent surfaces of the coil can be attached to the coil connecting portion of the L-shaped structure more closely, and the supporting area of the coil and the fixing frame is increased.

Alternatively, a plurality of support legs 602 are respectively disposed at both sides of the coil connecting portion 601, which can improve the installation stability of the fixing frame 60 itself, thereby enhancing the supporting function of the coil 20. As an implementation mode, the shape and the size of the supporting legs are completely the same, and the number of the supporting legs is even, so that the supporting legs can be equally arranged on two sides of the coil connecting part, the supporting legs on the two sides can generate approximately equal supporting force on the coil connecting part, and the deflection of the fixing frame is avoided. Optionally, two supporting legs are arranged on two sides of the coil connecting portion, the coil is arranged to be in an oblong shape, and the two supporting legs are distributed on two arc sections of the oblong coil on one side where the coil connecting portion is connected with the coil. Under the structural design, the connecting area of the coil and the second shell can be maximized. Meanwhile, the fixing frame can also provide stable support for the coil. Optionally, the supporting legs are fixedly connected with the second housing by welding.

In this embodiment, the coil 20 is supported by the fixing frame 60 disposed at a single side, and the supporting legs distributed at two sides form a stable supporting function of the fixing frame itself, which is beneficial to the fixing frame to provide reliable support for the coil. The arrangement of the fixing frame not only increases the connection area of the coil and the second housing 70, but also improves the stability of the connection of the coil and the second housing.

EXAMPLE III

Specifically, the structure of the fixing frame 60 is as shown in fig. 10 or 11. The fixing frame includes a coil connecting portion 601 and a supporting leg 602. Optionally, the coil connecting part is of a groove structure. When the coil clamp is used, the coil 20 is partially inserted into the groove structure, and the clamping phenomenon of the groove structure to the coil is formed. Optionally, the bottom surface of the groove structure is attached to a surface of the coil parallel to the thickness direction, and the side surface of the groove structure is attached to two surfaces of the coil perpendicular to the thickness direction. Alternatively, the exciter may include two fixing frames respectively provided at both ends of the coil, symmetrically with respect to a middle plane of the coil in the thickness direction. The two symmetrically arranged fixing frames 60 can form stable support for the coil. The coil can be arranged to be long circular, the bottom surface of the groove structure is attached to the arc-shaped section of the long circular coil, and therefore the plane between the two arc-shaped sections of the coil is connected with the second shell 70, and the connection strength of the coil and the second shell can be increased. Optionally, the coil connecting part and the coil are fixedly connected by gluing. At this time, the support leg is an outer surface of the coil connecting portion. The outer surface of the coil connecting part is connected to the second shell, so that the fixed frame and the second shell form fixed connection. Optionally, the outer surface of the coil connecting portion is connected with the second shell in a welding mode, and the improvement of the connecting strength of the fixing frame and the second shell is facilitated.

In this embodiment, the groove structure is supported on the arc-shaped section of the coil, the outer surface of the groove structure is fixedly connected with the second shell, the connection area of the coil and the second shell is increased, and therefore the connection stability of the coil is improved.

The utility model also provides an electronic product. The electronic product comprises the exciter as described above, and further comprises a product main body, wherein the product main body is divided into a fixed part and a vibrating part, one of the first shell and the second shell is connected with the vibrating part, the other of the first shell and the second shell is connected with the fixed part, and the vibrating part is configured to be capable of vibrating relative to the fixed part. The vibrating part may be a screen and a rear cover of an electronic product for vibrating and sounding (hereinafter, the screen is taken as an example for description), and the fixing part may be a part of a structure of the product main body, and the fixing part may be a middle frame, a side wall, or a PCB of the product main body. In order to mount other electronic devices in the product body, the product body is often configured with a partition, a middle frame and other structural components, which have good structural stability in the electronic product, and are used for mounting the electronic devices on one hand and protecting the electronic devices on the other hand. Therefore, the vibration reliability can be improved by using such a structural member in the product body as a fixing member.

The exciter sets up in the product main part, and the electronic product can be cell-phone, panel computer etc. this the utility model discloses do not limit to this. The screen is disposed on the product main body and serves as a display screen of the electronic product. And the screen is driven to vibrate and sound through the interaction force of the coil and the magnetic circuit component.

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

Claims

1. An actuator, comprising:

2. The actuator according to claim 1, wherein said fixing frame comprises a coil connecting portion and at least one supporting leg integrally formed with said coil connecting portion, said coil connecting portion having at least one surface connected to said coil, said supporting leg being connected to said second housing.

3. The exciter according to claim 2, wherein the coil connecting part is connected to the coil by gluing, and the supporting leg is fixedly connected to the second housing by welding.

4. An actuator as claimed in claim 2, wherein said coil connecting portion is formed in an L-shaped configuration, the lateral side of said L-shaped configuration is attached to the inner side of the winding hole of said coil, and the vertical side of said L-shaped configuration is attached to the outer side of said coil, said outer side being perpendicular to the inner side of said winding hole.

5. An actuator according to claim 2, wherein the coil connection portion is provided as a flat plate structure having a flat plate surface that is fitted to the coil.

6. An actuator according to claim 5, wherein the mounting frame comprises a plurality of support feet distributed on both sides of the plate structure.

7. An actuator according to claim 2, wherein the coil connecting portion is a groove structure into which the coil is inserted.

8. The exciter of claim 2, wherein the second housing defines a blind groove at a junction of the support legs, and the support legs are embedded in the blind groove.

9. An actuator according to claim 1, comprising two mounts, arranged on either side of the coil, symmetrically with respect to the coil.

10. An electronic product, characterized by the actuator of any one of claims 1-9;

a fixing member;